From 1aeca3947d7c938b9d14334d74f0fecd57a4eaf5 Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@status.net>
Date: Thu, 18 Feb 2010 01:47:44 +0000
Subject: [PATCH 01/97] Fix for cross site OMB posting problem

---
 lib/omb.php | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/lib/omb.php b/lib/omb.php
index 0f38a49369..17132a594f 100644
--- a/lib/omb.php
+++ b/lib/omb.php
@@ -29,11 +29,9 @@ require_once 'Auth/Yadis/Yadis.php';
 
 function omb_oauth_consumer()
 {
-    static $con = null;
-    if (is_null($con)) {
-        $con = new OAuthConsumer(common_root_url(), '');
-    }
-    return $con;
+    // Don't try to make this static. Leads to issues in
+    // multi-site setups - Z
+    return new OAuthConsumer(common_root_url(), '');
 }
 
 function omb_oauth_server()

From 16a43b1154baf967183279c5e291a080cb2d5868 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 14:14:45 -0500
Subject: [PATCH 02/97] slightly more robust remote profile creation

---
 plugins/OStatus/classes/Ostatus_profile.php | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index aab316c347..3b79f32c62 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -709,7 +709,7 @@ class Ostatus_profile extends Memcached_DataObject
     protected static function getActivityObjectProfile($object)
     {
         $uri = self::getActivityObjectProfileURI($object);
-        return Ostatus_profile::staticGet('homeuri', $uri);
+        return Ostatus_profile::staticGet('uri', $uri);
     }
 
     protected static function getActorProfileURI($activity)
@@ -747,9 +747,9 @@ class Ostatus_profile extends Memcached_DataObject
 
     protected static function createActivityObjectProfile($object, $feeduri=null, $salmonuri=null)
     {
-        $homeuri = self::getActivityObjectProfileURI($object);
+        $homeuri  = $object->id;
         $nickname = self::getActivityObjectNickname($object);
-        $avatar = self::getActivityObjectAvatar($object);
+        $avatar   = self::getActivityObjectAvatar($object);
 
         if (!$homeuri) {
             common_log(LOG_DEBUG, __METHOD__ . " empty actor profile URI: " . var_export($activity, true));
@@ -782,9 +782,9 @@ class Ostatus_profile extends Memcached_DataObject
         // @todo tags from categories
         // @todo lat/lon/location?
 
-        $ok = $profile->insert();
+        $profile_id = $profile->insert();
 
-        if (!$ok) {
+        if (!$profile_id) {
             throw new ServerException("Can't save local profile");
         }
 
@@ -797,7 +797,7 @@ class Ostatus_profile extends Memcached_DataObject
         $oprofile->uri        = $homeuri;
         $oprofile->feeduri    = $feeduri;
         $oprofile->salmonuri  = $salmonuri;
-        $oprofile->profile_id = $profile->id;
+        $oprofile->profile_id = $profile_id;
 
         $oprofile->created    = common_sql_now();
         $oprofile->modified   = common_sql_now();

From ad3406a919d950315ed1381ffb4dd8d47baf2c24 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 14:17:37 -0500
Subject: [PATCH 03/97] use Ostatus_profile::ensureActivityObjectProfile() in
 SalmonAction::ensureProfile()

---
 plugins/OStatus/lib/salmonaction.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/plugins/OStatus/lib/salmonaction.php b/plugins/OStatus/lib/salmonaction.php
index abd8d4c833..87e98ad354 100644
--- a/plugins/OStatus/lib/salmonaction.php
+++ b/plugins/OStatus/lib/salmonaction.php
@@ -155,10 +155,11 @@ class SalmonAction extends Action
         $actor = $this->act->actor;
         if (empty($actor->id)) {
             common_log(LOG_ERR, "broken actor: " . var_export($actor, true));
+            common_log(LOG_ERR, "activity with no actor: " . var_export($this->act, true));
             throw new Exception("Received a salmon slap from unidentified actor.");
         }
 
-        return Ostatus_profile::ensureActorProfile($this->act);
+        return Ostatus_profile::ensureActivityObjectProfile($actor);
     }
 
     function saveNotice()

From ab3db8c89971fc6148fbc8e0c031f9518c280bf1 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 16:20:30 -0500
Subject: [PATCH 04/97] Combine code that finds mentions into one place and add
 hook points

Combined the code that finds mentions of other profiles into one place.

common_find_mentions() finds mentions and calls hooks to allow
supplemental syntax for mentions (like OStatus).

common_linkify_mentions() links mentions.

common_linkify_mention() links a mention.

Notice::saveReplies() now uses common_find_mentions() instead of
trying to parse everything again.
---
 EVENTS.txt         |  15 ++++
 classes/Notice.php |  93 +++++++--------------
 lib/util.php       | 195 ++++++++++++++++++++++++++++++++-------------
 3 files changed, 184 insertions(+), 119 deletions(-)

diff --git a/EVENTS.txt b/EVENTS.txt
index c108606ce2..d3c2fb7bf6 100644
--- a/EVENTS.txt
+++ b/EVENTS.txt
@@ -748,3 +748,18 @@ EndDisfavorNotice: After saving a notice as a favorite
 - $profile: profile of the person faving (can be remote!)
 - $notice: notice being faved
 
+StartFindMentions: start finding mentions in a block of text
+- $sender: sender profile
+- $text: plain text version of the notice
+- &$mentions: mentions found so far. Array of arrays; each array
+  has 'mentioned' (array of mentioned profiles), 'url' (url to link as),
+  'title' (title of the link), 'position' (position of the text to
+  replace), 'text' (text to replace)
+
+EndFindMentions: end finding mentions in a block of text
+- $sender: sender profile
+- $text: plain text version of the notice
+- &$mentions: mentions found so far. Array of arrays; each array
+  has 'mentioned' (array of mentioned profiles), 'url' (url to link as),
+  'title' (title of the link), 'position' (position of the text to
+  replace), 'text' (text to replace)
diff --git a/classes/Notice.php b/classes/Notice.php
index 7e524cacd4..6f1ef81fc5 100644
--- a/classes/Notice.php
+++ b/classes/Notice.php
@@ -820,6 +820,7 @@ class Notice extends Memcached_DataObject
     /**
      * @return array of integer profile IDs
      */
+
     function saveReplies()
     {
         // Don't save reply data for repeats
@@ -828,76 +829,44 @@ class Notice extends Memcached_DataObject
             return array();
         }
 
-        // Alternative reply format
-        $tname = false;
-        if (preg_match('/^T ([A-Z0-9]{1,64}) /', $this->content, $match)) {
-            $tname = $match[1];
-        }
-        // extract all @messages
-        $cnt = preg_match_all('/(?:^|\s)@([a-z0-9]{1,64})/', $this->content, $match);
-
-        $names = array();
-
-        if ($cnt || $tname) {
-            // XXX: is there another way to make an array copy?
-            $names = ($tname) ? array_unique(array_merge(array(strtolower($tname)), $match[1])) : array_unique($match[1]);
-        }
-
         $sender = Profile::staticGet($this->profile_id);
 
+        $mentions = common_find_mentions($this->profile_id, $this->content);
+
         $replied = array();
 
         // store replied only for first @ (what user/notice what the reply directed,
         // we assume first @ is it)
 
-        for ($i=0; $i<count($names); $i++) {
-            $nickname = $names[$i];
-            $recipient = common_relative_profile($sender, $nickname, $this->created);
-            if (empty($recipient)) {
-                continue;
-            }
-            // Don't save replies from blocked profile to local user
-            $recipient_user = User::staticGet('id', $recipient->id);
-            if (!empty($recipient_user) && $recipient_user->hasBlocked($sender)) {
-                continue;
-            }
-            $reply = new Reply();
-            $reply->notice_id = $this->id;
-            $reply->profile_id = $recipient->id;
-            $id = $reply->insert();
-            if (!$id) {
-                $last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
-                common_log(LOG_ERR, 'DB error inserting reply: ' . $last_error->message);
-                common_server_error(sprintf(_('DB error inserting reply: %s'), $last_error->message));
-                return array();
-            } else {
-                $replied[$recipient->id] = 1;
-            }
-        }
+        foreach ($mentions as $mention) {
 
-        // Hash format replies, too
-        $cnt = preg_match_all('/(?:^|\s)@#([a-z0-9]{1,64})/', $this->content, $match);
-        if ($cnt) {
-            foreach ($match[1] as $tag) {
-                $tagged = Profile_tag::getTagged($sender->id, $tag);
-                foreach ($tagged as $t) {
-                    if (!$replied[$t->id]) {
-                        // Don't save replies from blocked profile to local user
-                        $t_user = User::staticGet('id', $t->id);
-                        if ($t_user && $t_user->hasBlocked($sender)) {
-                            continue;
-                        }
-                        $reply = new Reply();
-                        $reply->notice_id = $this->id;
-                        $reply->profile_id = $t->id;
-                        $id = $reply->insert();
-                        if (!$id) {
-                            common_log_db_error($reply, 'INSERT', __FILE__);
-                            return array();
-                        } else {
-                            $replied[$recipient->id] = 1;
-                        }
-                    }
+            foreach ($mention['mentioned'] as $mentioned) {
+
+                // skip if they're already covered
+
+                if (!empty($replied[$mentioned->id])) {
+                    continue;
+                }
+
+                // Don't save replies from blocked profile to local user
+
+                $mentioned_user = User::staticGet('id', $mentioned->id);
+                if (!empty($mentioned_user) && $mentioned_user->hasBlocked($sender)) {
+                    continue;
+                }
+
+                $reply = new Reply();
+
+                $reply->notice_id  = $this->id;
+                $reply->profile_id = $mentioned->id;
+
+                $id = $reply->insert();
+
+                if (!$id) {
+                    common_log_db_error($reply, 'INSERT', __FILE__);
+                    throw new ServerException("Couldn't save reply for {$this->id}, {$mentioned->id}");
+                } else {
+                    $replied[$mentioned->id] = 1;
                 }
             }
         }
diff --git a/lib/util.php b/lib/util.php
index ae812e8cf4..7fb2c6c4b0 100644
--- a/lib/util.php
+++ b/lib/util.php
@@ -426,13 +426,148 @@ function common_render_content($text, $notice)
 {
     $r = common_render_text($text);
     $id = $notice->profile_id;
-    $r = preg_replace('/(^|\s+)@(['.NICKNAME_FMT.']{1,64})/e', "'\\1@'.common_at_link($id, '\\2')", $r);
-    $r = preg_replace('/^T ([A-Z0-9]{1,64}) /e', "'T '.common_at_link($id, '\\1').' '", $r);
-    $r = preg_replace('/(^|[\s\.\,\:\;]+)@#([A-Za-z0-9]{1,64})/e', "'\\1@#'.common_at_hash_link($id, '\\2')", $r);
+    $r = common_linkify_mentions($id, $r);
     $r = preg_replace('/(^|[\s\.\,\:\;]+)!([A-Za-z0-9]{1,64})/e', "'\\1!'.common_group_link($id, '\\2')", $r);
     return $r;
 }
 
+function common_linkify_mentions($profile_id, $text)
+{
+    $mentions = common_find_mentions($profile_id, $text);
+
+    // We need to go through in reverse order by position,
+    // so our positions stay valid despite our fudging with the
+    // string!
+
+    $points = array();
+
+    foreach ($mentions as $mention)
+    {
+        $points[$mention['position']] = $mention;
+    }
+
+    krsort($points);
+
+    foreach ($points as $position => $mention) {
+
+        $linkText = common_linkify_mention($mention);
+
+        $text = substr_replace($text, $linkText, $position, mb_strlen($mention['text']));
+    }
+
+    return $text;
+}
+
+function common_linkify_mention($mention)
+{
+    $output = null;
+
+    if (Event::handle('StartLinkifyMention', array($mention, &$output))) {
+
+        $xs = new XMLStringer(false);
+
+        $attrs = array('href' => $mention['url'],
+                       'class' => 'url');
+
+        if (!empty($mention['title'])) {
+            $attrs['title'] = $mention['title'];
+        }
+
+        $xs->elementStart('span', 'vcard');
+        $xs->elementStart('a', $attrs);
+        $xs->element('span', 'fn nickname', $mention['text']);
+        $xs->elementEnd('a');
+        $xs->elementEnd('span');
+
+        $output = $xs->getString();
+
+        Event::handle('EndLinkifyMention', array($mention, &$output));
+    }
+
+    return $output;
+}
+
+function common_find_mentions($profile_id, $text)
+{
+    $mentions = array();
+
+    $sender = Profile::staticGet('id', $profile_id);
+
+    if (empty($sender)) {
+        return $mentions;
+    }
+
+    if (Event::handle('StartFindMentions', array($sender, $text, &$mentions))) {
+
+        preg_match_all('/^T ([A-Z0-9]{1,64}) /',
+                       $text,
+                       $tmatches,
+                       PREG_OFFSET_CAPTURE);
+
+        preg_match_all('/(?:^|\s+)@(['.NICKNAME_FMT.']{1,64})/',
+                       $text,
+                       $atmatches,
+                       PREG_OFFSET_CAPTURE);
+
+        $matches = array_merge($tmatches[1], $atmatches[1]);
+
+        foreach ($matches as $match) {
+
+            $nickname = common_canonical_nickname($match[0]);
+            $mentioned = common_relative_profile($sender, $nickname);
+
+            if (!empty($mentioned)) {
+
+                $user = User::staticGet('id', $mentioned->id);
+
+                if ($user) {
+                    $url = common_local_url('userbyid', array('id' => $user->id));
+                } else {
+                    $url = $mentioned->profileurl;
+                }
+
+                $mention = array('mentioned' => array($mentioned),
+                                 'text' => $match[0],
+                                 'position' => $match[1],
+                                 'url' => $url);
+
+                if (!empty($mentioned->fullname)) {
+                    $mention['title'] = $mentioned->fullname;
+                }
+
+                $mentions[] = $mention;
+            }
+        }
+
+        // @#tag => mention of all subscriptions tagged 'tag'
+
+        preg_match_all('/(?:^|[\s\.\,\:\;]+)@#([\pL\pN_\-\.]{1,64})/',
+                       $text,
+                       $hmatches,
+                       PREG_OFFSET_CAPTURE);
+
+        foreach ($hmatches[1] as $hmatch) {
+
+            $tag = common_canonical_tag($hmatch[0]);
+
+            $tagged = Profile_tag::getTagged($sender->id, $tag);
+
+            $url = common_local_url('subscriptions',
+                                    array('nickname' => $sender->nickname,
+                                          'tag' => $tag));
+
+            $mentions[] = array('mentioned' => $tagged,
+                                'text' => $hmatch[0],
+                                'position' => $hmatch[1],
+                                'url' => $url);
+        }
+
+        Event::handle('EndFindMentions', array($sender, $text, &$mentions));
+    }
+
+    return $mentions;
+}
+
 function common_render_text($text)
 {
     $r = htmlspecialchars($text);
@@ -663,37 +798,6 @@ function common_valid_profile_tag($str)
     return preg_match('/^[A-Za-z0-9_\-\.]{1,64}$/', $str);
 }
 
-function common_at_link($sender_id, $nickname)
-{
-    $sender = Profile::staticGet($sender_id);
-    if (!$sender) {
-        return $nickname;
-    }
-    $recipient = common_relative_profile($sender, common_canonical_nickname($nickname));
-    if ($recipient) {
-        $user = User::staticGet('id', $recipient->id);
-        if ($user) {
-            $url = common_local_url('userbyid', array('id' => $user->id));
-        } else {
-            $url = $recipient->profileurl;
-        }
-        $xs = new XMLStringer(false);
-        $attrs = array('href' => $url,
-                       'class' => 'url');
-        if (!empty($recipient->fullname)) {
-            $attrs['title'] = $recipient->fullname . ' (' . $recipient->nickname . ')';
-        }
-        $xs->elementStart('span', 'vcard');
-        $xs->elementStart('a', $attrs);
-        $xs->element('span', 'fn nickname', $nickname);
-        $xs->elementEnd('a');
-        $xs->elementEnd('span');
-        return $xs->getString();
-    } else {
-        return $nickname;
-    }
-}
-
 function common_group_link($sender_id, $nickname)
 {
     $sender = Profile::staticGet($sender_id);
@@ -716,29 +820,6 @@ function common_group_link($sender_id, $nickname)
     }
 }
 
-function common_at_hash_link($sender_id, $tag)
-{
-    $user = User::staticGet($sender_id);
-    if (!$user) {
-        return $tag;
-    }
-    $tagged = Profile_tag::getTagged($user->id, common_canonical_tag($tag));
-    if ($tagged) {
-        $url = common_local_url('subscriptions',
-                                array('nickname' => $user->nickname,
-                                      'tag' => $tag));
-        $xs = new XMLStringer();
-        $xs->elementStart('span', 'tag');
-        $xs->element('a', array('href' => $url,
-                                'rel' => $tag),
-                     $tag);
-        $xs->elementEnd('span');
-        return $xs->getString();
-    } else {
-        return $tag;
-    }
-}
-
 function common_relative_profile($sender, $nickname, $dt=null)
 {
     // Try to find profiles this profile is subscribed to that have this nickname

From 10f6c023f4573868326c4b6599bdfb66cffdd7d6 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 16:23:55 -0500
Subject: [PATCH 05/97] include namespaces in posted activities in
 notifyActivity()

---
 plugins/OStatus/classes/Ostatus_profile.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 3b79f32c62..b67e202026 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -361,7 +361,7 @@ class Ostatus_profile extends Memcached_DataObject
     {
         if ($this->salmonuri) {
 
-            $xml = $activity->asString();
+            $xml = $activity->asString(true);
 
             $salmon = new Salmon(); // ?
 

From 5349aa420ed45c2f5bf773d10c7709826ae6babd Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Sun, 21 Feb 2010 13:40:59 -0800
Subject: [PATCH 06/97] OStatus feedsub fixlets: - actually udpate
 feedsub.last_update when we get a new PuSH update in - move incoming PuSH
 processing to a queue handler to minimize time spent before POST return, as
 recommended by PuSH spec. When queues are disabled this'll still be handled
 immediately.

---
 plugins/OStatus/OStatusPlugin.php             |  4 ++
 plugins/OStatus/actions/pushcallback.php      |  9 +++-
 plugins/OStatus/classes/FeedSub.php           | 10 ++++
 plugins/OStatus/lib/pushinputqueuehandler.php | 49 +++++++++++++++++++
 4 files changed, 70 insertions(+), 2 deletions(-)
 create mode 100644 plugins/OStatus/lib/pushinputqueuehandler.php

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index b966661db6..c5a2db3d84 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -78,9 +78,13 @@ class OStatusPlugin extends Plugin
      */
     function onEndInitializeQueueManager(QueueManager $qm)
     {
+        // Outgoing from our internal PuSH hub
         $qm->connect('hubverify', 'HubVerifyQueueHandler');
         $qm->connect('hubdistrib', 'HubDistribQueueHandler');
         $qm->connect('hubout', 'HubOutQueueHandler');
+
+        // Incoming from a foreign PuSH hub
+        $qm->connect('pushinput', 'PushInputQueueHandler');
         return true;
     }
 
diff --git a/plugins/OStatus/actions/pushcallback.php b/plugins/OStatus/actions/pushcallback.php
index 7e1227a66a..9e976a80de 100644
--- a/plugins/OStatus/actions/pushcallback.php
+++ b/plugins/OStatus/actions/pushcallback.php
@@ -60,9 +60,14 @@ class PushCallbackAction extends Action
 
         $post = file_get_contents('php://input');
 
-        // @fixme Queue this to a background process; we should return
+        // Queue this to a background process; we should return
         // as quickly as possible from a distribution POST.
-        $feedsub->receive($post, $hmac);
+        // If queues are disabled this'll process immediately.
+        $data = array('feedsub_id' => $feedsub->id,
+                      'post' => $post,
+                      'hmac' => $hmac);
+        $qm = QueueManager::get();
+        $qm->enqueue($data, 'pushinput');
     }
     
     /**
diff --git a/plugins/OStatus/classes/FeedSub.php b/plugins/OStatus/classes/FeedSub.php
index bf9d063fa1..31241d3de7 100644
--- a/plugins/OStatus/classes/FeedSub.php
+++ b/plugins/OStatus/classes/FeedSub.php
@@ -372,6 +372,12 @@ class FeedSub extends Memcached_DataObject
      * feed (as a DOMDocument) will be passed to the StartFeedSubHandleFeed
      * and EndFeedSubHandleFeed events for processing.
      *
+     * Not guaranteed to be running in an immediate POST context; may be run
+     * from a queue handler.
+     *
+     * Side effects: the feedsub record's lastupdate field will be updated
+     * to the current time (not published time) if we got a legit update.
+     *
      * @param string $post source of Atom or RSS feed
      * @param string $hmac X-Hub-Signature header, if present
      */
@@ -402,6 +408,10 @@ class FeedSub extends Memcached_DataObject
             return;
         }
 
+        $orig = clone($this);
+        $this->last_update = common_sql_now();
+        $this->update($orig);
+
         Event::handle('StartFeedSubReceive', array($this, $feed));
         Event::handle('EndFeedSubReceive', array($this, $feed));
     }
diff --git a/plugins/OStatus/lib/pushinputqueuehandler.php b/plugins/OStatus/lib/pushinputqueuehandler.php
new file mode 100644
index 0000000000..cbd9139b50
--- /dev/null
+++ b/plugins/OStatus/lib/pushinputqueuehandler.php
@@ -0,0 +1,49 @@
+<?php
+/*
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Process a feed distribution POST from a PuSH hub.
+ * @package FeedSub
+ * @author Brion Vibber <brion@status.net>
+ */
+
+class PushInputQueueHandler extends QueueHandler
+{
+    function transport()
+    {
+        return 'pushinput';
+    }
+
+    function handle($data)
+    {
+        assert(is_array($data));
+
+        $feedsub_id = $data['feedsub_id'];
+        $post = $data['post'];
+        $hmac = $data['hmac'];
+
+        $feedsub = FeedSub::staticGet('id', $feedsub_id);
+        if ($feedsub) {
+            $feedsub->receive($post, $hmac);
+        } else {
+            common_log(LOG_ERR, "Discarding POST to unknown feed subscription id $feedsub_id");
+        }
+        return true;
+    }
+}

From 1c22bf20f1e99664b02d71318592b73e7fb4d4b5 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 17:00:05 -0500
Subject: [PATCH 07/97] fixup activity serialization so salmon notifications
 work

---
 plugins/OStatus/lib/activity.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/plugins/OStatus/lib/activity.php b/plugins/OStatus/lib/activity.php
index f25a843c36..af83f8bc66 100644
--- a/plugins/OStatus/lib/activity.php
+++ b/plugins/OStatus/lib/activity.php
@@ -392,7 +392,7 @@ class ActivityObject
 
         if (!empty($this->content)) {
             // XXX: assuming HTML content here
-            $xs->element(self::CONTENT, array('type' => 'html'), $this->content);
+            $xs->element(ActivityUtils::CONTENT, array('type' => 'html'), $this->content);
         }
 
         if (!empty($this->link)) {
@@ -700,7 +700,7 @@ class Activity
         // XXX: add context
         // XXX: add target
 
-        $xs->raw($this->actor->asString());
+        $xs->raw($this->actor->asString('activity:actor'));
         $xs->element('activity:verb', null, $this->verb);
         $xs->raw($this->object->asString());
 

From aa0b2ce81ad4a99fb55a36feda54e70bcd0808be Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Sun, 21 Feb 2010 14:28:06 -0800
Subject: [PATCH 08/97] OStatus PuSH fixlets: - set minimal error page output
 on PuSH callback - allow hub to retry ($config['ostatus']['hub_retries']),
 simplify internal iface a bit. Retries are pushed to end of queue but
 otherwise not delayed yet; makes delivery more robust to one-off transitory
 errors but not yet against downtime.

---
 plugins/OStatus/actions/pushcallback.php      |  1 +
 plugins/OStatus/classes/HubSub.php            | 47 ++++++++++++-------
 .../OStatus/lib/hubdistribqueuehandler.php    |  5 +-
 plugins/OStatus/lib/huboutqueuehandler.php    | 18 +++++--
 4 files changed, 46 insertions(+), 25 deletions(-)

diff --git a/plugins/OStatus/actions/pushcallback.php b/plugins/OStatus/actions/pushcallback.php
index 9e976a80de..35c92c7323 100644
--- a/plugins/OStatus/actions/pushcallback.php
+++ b/plugins/OStatus/actions/pushcallback.php
@@ -29,6 +29,7 @@ class PushCallbackAction extends Action
 {
     function handle()
     {
+        StatusNet::setApi(true); // Minimize error messages to aid in debugging
         parent::handle();
         if ($_SERVER['REQUEST_METHOD'] == 'POST') {
             $this->handlePost();
diff --git a/plugins/OStatus/classes/HubSub.php b/plugins/OStatus/classes/HubSub.php
index 0cd4281f8f..a81de68e69 100644
--- a/plugins/OStatus/classes/HubSub.php
+++ b/plugins/OStatus/classes/HubSub.php
@@ -226,6 +226,26 @@ class HubSub extends Memcached_DataObject
         return parent::insert();
     }
 
+    /**
+     * Schedule delivery of a 'fat ping' to the subscriber's callback
+     * endpoint. If queues are disabled, this will run immediately.
+     *
+     * @param string $atom well-formed Atom feed
+     * @param int $retries optional count of retries if POST fails; defaults to hub_retries from config or 0 if unset
+     */
+    function distribute($atom, $retries=null)
+    {
+        if ($retries === null) {
+            $retries = intval(common_config('ostatus', 'hub_retries'));
+        }
+
+        $data = array('sub' => clone($this),
+                      'atom' => $atom,
+                      'retries' => $retries);
+        $qm = QueueManager::get();
+        $qm->enqueue($data, 'hubout');
+    }
+
     /**
      * Send a 'fat ping' to the subscriber's callback endpoint
      * containing the given Atom feed chunk.
@@ -234,6 +254,7 @@ class HubSub extends Memcached_DataObject
      * a higher level; don't just shove in a complete feed!
      *
      * @param string $atom well-formed Atom feed
+     * @throws Exception (HTTP or general)
      */
     function push($atom)
     {
@@ -245,24 +266,18 @@ class HubSub extends Memcached_DataObject
             $hmac = '(none)';
         }
         common_log(LOG_INFO, "About to push feed to $this->callback for $this->topic, HMAC $hmac");
-        try {
-            $request = new HTTPClient();
-            $request->setBody($atom);
-            $response = $request->post($this->callback, $headers);
 
-            if ($response->isOk()) {
-                return true;
-            }
-            common_log(LOG_ERR, "Error sending PuSH content " .
-                                "to $this->callback for $this->topic: " .
-                                $response->getStatus());
-            return false;
+        $request = new HTTPClient();
+        $request->setBody($atom);
+        $response = $request->post($this->callback, $headers);
 
-        } catch (Exception $e) {
-            common_log(LOG_ERR, "Error sending PuSH content " .
-                                "to $this->callback for $this->topic: " .
-                                $e->getMessage());
-            return false;
+        if ($response->isOk()) {
+            return true;
+        } else {
+            throw new Exception("Callback returned status: " .
+                                $response->getStatus() .
+                                "; body: " .
+                                trim($response->getBody()));
         }
     }
 }
diff --git a/plugins/OStatus/lib/hubdistribqueuehandler.php b/plugins/OStatus/lib/hubdistribqueuehandler.php
index 245a57f720..30a427e3fc 100644
--- a/plugins/OStatus/lib/hubdistribqueuehandler.php
+++ b/plugins/OStatus/lib/hubdistribqueuehandler.php
@@ -124,10 +124,7 @@ class HubDistribQueueHandler extends QueueHandler
         common_log(LOG_INFO, "Preparing $sub->N PuSH distribution(s) for $sub->topic");
         $qm = QueueManager::get();
         while ($sub->fetch()) {
-            common_log(LOG_INFO, "Prepping PuSH distribution to $sub->callback for $sub->topic");
-            $data = array('sub' => clone($sub),
-                          'atom' => $atom);
-            $qm->enqueue($data, 'hubout');
+            $sub->distribute($atom);
         }
     }
 
diff --git a/plugins/OStatus/lib/huboutqueuehandler.php b/plugins/OStatus/lib/huboutqueuehandler.php
index 0791c7e5db..3ad94646e6 100644
--- a/plugins/OStatus/lib/huboutqueuehandler.php
+++ b/plugins/OStatus/lib/huboutqueuehandler.php
@@ -33,6 +33,7 @@ class HubOutQueueHandler extends QueueHandler
     {
         $sub = $data['sub'];
         $atom = $data['atom'];
+        $retries = $data['retries'];
 
         assert($sub instanceof HubSub);
         assert(is_string($atom));
@@ -40,13 +41,20 @@ class HubOutQueueHandler extends QueueHandler
         try {
             $sub->push($atom);
         } catch (Exception $e) {
-            common_log(LOG_ERR, "Failed PuSH to $sub->callback for $sub->topic: " .
-                                $e->getMessage());
-            // @fixme Reschedule a later delivery?
-            return true;
+            $retries--;
+            $msg = "Failed PuSH to $sub->callback for $sub->topic: " .
+                   $e->getMessage();
+            if ($retries > 0) {
+                common_log(LOG_ERR, "$msg; scheduling for $retries more tries");
+
+                // @fixme when we have infrastructure to schedule a retry
+                // after a delay, use it.
+                $sub->distribute($atom, $retries);
+            } else {
+                common_log(LOG_ERR, "$msg; discarding");
+            }
         }
 
         return true;
     }
 }
-

From 10281d59f4bf8298ff65792d1a7826913d96fafa Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@status.net>
Date: Sun, 21 Feb 2010 14:43:28 -0800
Subject: [PATCH 09/97] Add PoCo namespace to notice feeds

---
 lib/atomnoticefeed.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/atomnoticefeed.php b/lib/atomnoticefeed.php
index 7653f91544..d2bf2a416f 100644
--- a/lib/atomnoticefeed.php
+++ b/lib/atomnoticefeed.php
@@ -64,6 +64,11 @@ class AtomNoticeFeed extends Atom10Feed
             'http://activitystrea.ms/spec/1.0/'
         );
 
+        $this->addNamespace(
+            'poco',
+            'http://portablecontacts.net/spec/1.0'
+        );
+
         // XXX: What should the uri be?
         $this->addNamespace(
             'ostatus',

From f6ebe815382a61574df5f9452ee9a0ea4ae38f0c Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Sun, 21 Feb 2010 15:21:18 -0800
Subject: [PATCH 10/97] Performance fix for FriendFeed sup interface: MySQL
 query optimizer was doing a table scan on notice; explicit subquery makes it
 run much more efficiently, only scanning items within the period under
 consideration. Standard subquery should be PostgreSQL-compatible.

---
 actions/sup.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/actions/sup.php b/actions/sup.php
index 5daf0a1c1d..4e428dfa58 100644
--- a/actions/sup.php
+++ b/actions/sup.php
@@ -66,10 +66,12 @@ class SupAction extends Action
         $divider = common_sql_date(time() - $seconds);
 
         $notice->query('SELECT profile_id, max(id) AS max_id ' .
-                       'FROM notice ' .
+                       'FROM ( ' .
+                       'SELECT profile_id, id FROM notice ' .
                         ((common_config('db','type') == 'pgsql') ?
                        'WHERE extract(epoch from created) > (extract(epoch from now()) - ' . $seconds . ') ' :
                        'WHERE created > "'.$divider.'" ' ) .
+                       ') AS latest ' .
                        'GROUP BY profile_id');
 
         $updates = array();

From fde64ddf2688fa0bd78e3d59f4003c3392fe2d30 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 21:36:36 -0500
Subject: [PATCH 11/97] make some of the Webfinger magic strings constants

---
 plugins/OStatus/lib/webfinger.php | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/plugins/OStatus/lib/webfinger.php b/plugins/OStatus/lib/webfinger.php
index 417d54904b..0386881d14 100644
--- a/plugins/OStatus/lib/webfinger.php
+++ b/plugins/OStatus/lib/webfinger.php
@@ -32,11 +32,16 @@ define('WEBFINGER_SERVICE_REL_VALUE', 'lrdd');
 /**
  * Implement the webfinger protocol.
  */
+
 class Webfinger
 {
+    const PROFILEPAGE = 'http://webfinger.net/rel/profile-page';
+    const UPDATESFROM = 'http://schemas.google.com/g/2010#updates-from';
+
     /**
      * Perform a webfinger lookup given an account.
-     */ 
+     */
+
     public function lookup($id)
     {
         $id = $this->normalize($id);
@@ -46,7 +51,7 @@ class Webfinger
         if (!$links) {
             return false;
         }
-        
+
         $services = array();
         foreach ($links as $link) {
             if ($link['template']) {
@@ -64,7 +69,7 @@ class Webfinger
     function normalize($id)
     {
         if (substr($id, 0, 7) == 'acct://') {
-            return substr($id, 7); 
+            return substr($id, 7);
         } else if (substr($id, 0, 5) == 'acct:') {
             return substr($id, 5);
         }
@@ -86,7 +91,7 @@ class Webfinger
         if ($result->host != $domain) {
             return false;
         }
-        
+
         $links = array();
         foreach ($result->links as $link) {
             if ($link['rel'] == WEBFINGER_SERVICE_REL_VALUE) {
@@ -140,4 +145,3 @@ class Webfinger
     }
 }
 
-

From bf23c35495bf713ec662649b2e8964e90da93239 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 21:37:12 -0500
Subject: [PATCH 12/97] Add OStatus_profile::ensureWebfinger()

---
 plugins/OStatus/classes/Ostatus_profile.php | 103 ++++++++++++++++++++
 1 file changed, 103 insertions(+)

diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index b67e202026..700168c118 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -845,4 +845,107 @@ class Ostatus_profile extends Memcached_DataObject
             return null;
         }
     }
+
+    public static function ensureWebfinger($addr)
+    {
+        // First, look it up
+
+        $oprofile = Ostatus_profile::staticGet('uri', 'acct:'.$addr);
+
+        if (!empty($oprofile)) {
+            return $oprofile;
+        }
+
+        // Now, try some discovery
+
+        $wf = new Webfinger();
+
+        $result = $wf->lookup($addr);
+
+        if (!$result) {
+            return null;
+        }
+
+        foreach ($result->links as $link) {
+            switch ($link['rel']) {
+            case Webfinger::PROFILEPAGE:
+                $profileUrl = $link['href'];
+                break;
+            case 'salmon':
+                $salmonEndpoint = $link['href'];
+                break;
+            case Webfinger::UPDATESFROM:
+                $feedUrl = $link['href'];
+                break;
+            default:
+                common_log(LOG_NOTICE, "Don't know what to do with rel = '{$link['rel']}'");
+                break;
+            }
+        }
+
+        // If we got a feed URL, try that
+
+        if (isset($feedUrl)) {
+            try {
+                $oprofile = self::ensureProfile($feedUrl);
+                return $oprofile;
+            } catch (Exception $e) {
+                common_log(LOG_WARNING, "Failed creating profile from feed URL '$feedUrl': " . $e->getMessage());
+                // keep looking
+            }
+        }
+
+        // If we got a profile page, try that!
+
+        if (isset($profileUrl)) {
+            try {
+                $oprofile = self::ensureProfile($profileUrl);
+                return $oprofile;
+            } catch (Exception $e) {
+                common_log(LOG_WARNING, "Failed creating profile from profile URL '$profileUrl': " . $e->getMessage());
+                // keep looking
+            }
+        }
+
+        // XXX: try hcard
+        // XXX: try FOAF
+
+        if (isset($salmonEndpoint)) {
+
+            // An account URL, a salmon endpoint, and a dream? Not much to go
+            // on, but let's give it a try
+
+            $uri = 'acct:'.$addr;
+
+            $profile = new Profile();
+
+            $profile->nickname = self::nicknameFromUri($uri);
+            $profile->created  = common_sql_now();
+
+            $profile_id = $profile->insert();
+
+            if (!$profile_id) {
+                common_log_db_error($profile, 'INSERT', __FILE__);
+                throw new Exception("Couldn't save profile for '$addr'");
+            }
+
+            $oprofile = new Ostatus_profile();
+
+            $oprofile->uri        = $uri;
+            $oprofile->salmonuri  = $salmonEndpoint;
+            $oprofile->profile_id = $profile_id;
+            $oprofile->created    = common_sql_now();
+
+            $result = $oprofile->insert();
+
+            if (!$result) {
+                common_log_db_error($oprofile, 'INSERT', __FILE__);
+                throw new Exception("Couldn't save ostatus_profile for '$addr'");
+            }
+
+            return $oprofile;
+        }
+
+        return null;
+    }
 }

From bd74f05a665df73078134c37f059cc1797d1a0ea Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 21:38:16 -0500
Subject: [PATCH 13/97] Do mention lookup for Webfinger accounts in
 OStatusPlugin

---
 plugins/OStatus/OStatusPlugin.php | 79 +++++++++++++++----------------
 1 file changed, 37 insertions(+), 42 deletions(-)

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index c5a2db3d84..60bb144a83 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -136,25 +136,6 @@ class OStatusPlugin extends Plugin
         return true;
     }
 
-    /**
-     * Add the feed settings page to the Connect Settings menu
-     *
-     * @param Action &$action The calling page
-     *
-     * @return boolean hook return
-     */
-    function onEndConnectSettingsNav(&$action)
-    {
-        $action_name = $action->trimmed('action');
-
-        $action->menuItem(common_local_url('feedsubsettings'),
-                          _m('Feeds'),
-                          _m('Feed subscription options'),
-                          $action_name === 'feedsubsettings');
-
-        return true;
-    }
-
     /**
      * Automatically load the actions and libraries used by the plugin
      *
@@ -215,33 +196,16 @@ class OStatusPlugin extends Plugin
      * @fixme push webfinger lookup & sending to a background queue
      * @fixme also detect short-form name for remote subscribees where not ambiguous
      */
+
     function onEndNoticeSave($notice)
     {
-        $count = preg_match_all('/(\w+\.)*\w+@(\w+\.)*\w+(\w+\-\w+)*\.\w+/', $notice->content, $matches);
-        if ($count) {
-            foreach ($matches[0] as $webfinger) {
+        $mentioned = $notice->getReplies();
 
-                // FIXME: look up locally first
+        foreach ($mentioned as $profile) {
 
-                // Check to see if we've got an actual webfinger
-                $w = new Webfinger;
+            $oprofile = Ostatus_profile::staticGet('profile_id', $profile->id);
 
-                $endpoint_uri = '';
-
-                $result = $w->lookup($webfinger);
-                if (empty($result)) {
-                    continue;
-                }
-
-                foreach ($result->links as $link) {
-                    if ($link['rel'] == 'salmon') {
-                        $endpoint_uri = $link['href'];
-                    }
-                }
-
-                if (empty($endpoint_uri)) {
-                    continue;
-                }
+            if (!empty($oprofile) && !empty($oprofile->salmonuri)) {
 
                 // FIXME: this needs to go out in a queue handler
 
@@ -249,11 +213,42 @@ class OStatusPlugin extends Plugin
                 $xml .= $notice->asAtomEntry();
 
                 $salmon = new Salmon();
-                $salmon->post($endpoint_uri, $xml);
+                $salmon->post($oprofile->salmonuri, $xml);
             }
         }
     }
 
+    /**
+     *
+     */
+
+    function onEndFindMentions($sender, $text, &$mentions)
+    {
+        preg_match_all('/(?:^|\s+)@((?:\w+\.)*\w+@(?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+)/',
+                       $text,
+                       $wmatches,
+                       PREG_OFFSET_CAPTURE);
+
+        foreach ($wmatches[1] as $wmatch) {
+
+            $webfinger = $wmatch[0];
+
+            $oprofile = Ostatus_profile::ensureWebfinger($webfinger);
+
+            if (!empty($oprofile)) {
+
+                $profile = $oprofile->localProfile();
+
+                $mentions[] = array('mentioned' => array($profile),
+                                    'text' => $wmatch[0],
+                                    'position' => $wmatch[1],
+                                    'url' => $profile->profileurl);
+            }
+        }
+
+        return true;
+    }
+
     /**
      * Notify remote server and garbage collect unused feeds on unsubscribe.
      * @fixme send these operations to background queues

From 912814fb7f3580e6925b5fae7092966df9bf3aab Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 21:38:59 -0500
Subject: [PATCH 14/97] use some constants and do some extra output in
 webfinger output

---
 plugins/OStatus/actions/webfinger.php | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/plugins/OStatus/actions/webfinger.php b/plugins/OStatus/actions/webfinger.php
index f4dc61b7d1..cf60b8069d 100644
--- a/plugins/OStatus/actions/webfinger.php
+++ b/plugins/OStatus/actions/webfinger.php
@@ -37,7 +37,7 @@ class WebfingerAction extends Action
 
         return true;
     }
-        
+
     function handle()
     {
         $acct = Webfinger::normalize($this->uri);
@@ -55,16 +55,22 @@ class WebfingerAction extends Action
 
         $xrd->subject = $this->uri;
         $xrd->alias[] = common_profile_url($nick);
-        $xrd->links[] = array('rel' => 'http://webfinger.net/rel/profile-page',
+        $xrd->links[] = array('rel' => Webfinger::PROFILEPAGE,
                               'type' => 'text/html',
                               'href' => common_profile_url($nick));
 
+        $xrd->links[] = array('rel' => Webfinger::UPDATESFROM,
+                              'href' => common_local_url('ApiTimelineUser',
+                                                         array('id' => $this->user->id,
+                                                               'format' => 'atom')),
+                              'type' => 'application/atom+xml');
+
         $salmon_url = common_local_url('salmon',
                                        array('id' => $this->user->id));
 
         $xrd->links[] = array('rel' => 'salmon',
                               'href' => $salmon_url);
-        
+
         // TODO - finalize where the redirect should go on the publisher
         $url = common_local_url('ostatussub') . '?profile={uri}';
         $xrd->links[] = array('rel' => 'http://ostatus.org/schema/1.0/subscribe',

From 78ca45c7a05dea911c58097a8c57be470dafee01 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Sun, 21 Feb 2010 14:46:26 -0800
Subject: [PATCH 15/97] OStatus PuSH fixes: - hub now defers subscription state
 updates until after verification, per spec - hub now supports synchronous
 verification when requested (if async is not requested after) - client now
 requests synchronous verification (it's a bit safer) - cleanup on
 subscription logging/error responses

---
 plugins/OStatus/actions/pushcallback.php |  38 +++---
 plugins/OStatus/actions/pushhub.php      | 151 +++++++++++++----------
 plugins/OStatus/classes/FeedSub.php      |  11 +-
 plugins/OStatus/classes/HubSub.php       | 125 +++++++++++--------
 4 files changed, 185 insertions(+), 140 deletions(-)

diff --git a/plugins/OStatus/actions/pushcallback.php b/plugins/OStatus/actions/pushcallback.php
index 35c92c7323..4184f0e0c0 100644
--- a/plugins/OStatus/actions/pushcallback.php
+++ b/plugins/OStatus/actions/pushcallback.php
@@ -72,7 +72,7 @@ class PushCallbackAction extends Action
     }
     
     /**
-     * Handler for GET verification requests from the hub
+     * Handler for GET verification requests from the hub.
      */
     function handleGet()
     {
@@ -81,31 +81,37 @@ class PushCallbackAction extends Action
         $challenge = $this->arg('hub_challenge');
         $lease_seconds = $this->arg('hub_lease_seconds');
         $verify_token = $this->arg('hub_verify_token');
-        
+
         if ($mode != 'subscribe' && $mode != 'unsubscribe') {
-            common_log(LOG_WARNING, __METHOD__ . ": bogus hub callback with mode \"$mode\"");
-            throw new ServerException("Bogus hub callback: bad mode", 404);
+            throw new ClientException("Bad hub.mode $mode", 404);
         }
-        
+
         $feedsub = FeedSub::staticGet('uri', $topic);
         if (!$feedsub) {
-            common_log(LOG_WARNING, __METHOD__ . ": bogus hub callback for unknown feed $topic");
-            throw new ServerException("Bogus hub callback: unknown feed", 404);
+            throw new ClientException("Bad hub.topic feed $topic", 404);
         }
 
         if ($feedsub->verify_token !== $verify_token) {
-            common_log(LOG_WARNING, __METHOD__ . ": bogus hub callback with bad token \"$verify_token\" for feed $topic");
-            throw new ServerException("Bogus hub callback: bad token", 404);
+            throw new ClientException("Bad hub.verify_token $token for $topic", 404);
         }
 
-        if ($mode != $feedsub->sub_state) {
-            common_log(LOG_WARNING, __METHOD__ . ": bogus hub callback with bad mode \"$mode\" for feed $topic in state \"{$feedsub->sub_state}\"");
-            throw new ServerException("Bogus hub callback: mode doesn't match subscription state.", 404);
-        }
-
-        // OK!
         if ($mode == 'subscribe') {
-            common_log(LOG_INFO, __METHOD__ . ': sub confirmed');
+            // We may get re-sub requests legitimately.
+            if ($feedsub->sub_state != 'subscribe' && $feedsub->sub_state != 'active') {
+                throw new ClientException("Unexpected subscribe request for $topic.", 404);
+            }
+        } else {
+            if ($feedsub->sub_state != 'unsubscribe') {
+                throw new ClientException("Unexpected unsubscribe request for $topic.", 404);
+            }
+        }
+
+        if ($mode == 'subscribe') {
+            if ($feedsub->sub_state == 'active') {
+                common_log(LOG_INFO, __METHOD__ . ': sub update confirmed');
+            } else {
+                common_log(LOG_INFO, __METHOD__ . ': sub confirmed');
+            }
             $feedsub->confirmSubscribe($lease_seconds);
         } else {
             common_log(LOG_INFO, __METHOD__ . ": unsub confirmed; deleting sub record for $topic");
diff --git a/plugins/OStatus/actions/pushhub.php b/plugins/OStatus/actions/pushhub.php
index 19599d815f..f33690bc49 100644
--- a/plugins/OStatus/actions/pushhub.php
+++ b/plugins/OStatus/actions/pushhub.php
@@ -59,102 +59,121 @@ class PushHubAction extends Action
         $mode = $this->trimmed('hub.mode');
         switch ($mode) {
         case "subscribe":
-            $this->subscribe();
-            break;
         case "unsubscribe":
-            $this->unsubscribe();
+            $this->subunsub($mode);
             break;
         case "publish":
-            throw new ServerException("Publishing outside feeds not supported.", 400);
+            throw new ClientException("Publishing outside feeds not supported.", 400);
         default:
-            throw new ServerException("Unrecognized mode '$mode'.", 400);
+            throw new ClientException("Unrecognized mode '$mode'.", 400);
         }
     }
 
     /**
-     * Process a PuSH feed subscription request.
+     * Process a request for a new or modified PuSH feed subscription.
+     * If asynchronous verification is requested, updates won't be saved immediately.
      *
      * HTTP return codes:
      *   202 Accepted - request saved and awaiting verification
      *   204 No Content - already subscribed
-     *   403 Forbidden - rejecting this (not specifically spec'd)
+     *   400 Bad Request - rejecting this (not specifically spec'd)
      */
-    function subscribe()
+    function subunsub($mode)
     {
-        $feed = $this->argUrl('hub.topic');
         $callback = $this->argUrl('hub.callback');
+
+        $topic = $this->argUrl('hub.topic');
+        if (!$this->recognizedFeed($topic)) {
+            throw new ClientException("Unsupported hub.topic $topic; this hub only serves local user and group Atom feeds.");
+        }
+
+        $verify = $this->arg('hub.verify'); // @fixme may be multiple
+        if ($verify != 'sync' && $verify != 'async') {
+            throw new ClientException("Invalid hub.verify $verify; must be sync or async.");
+        }
+
+        $lease = $this->arg('hub.lease_seconds', null);
+        if ($mode == 'subscribe' && $lease != '' && !preg_match('/^\d+$/', $lease)) {
+            throw new ClientException("Invalid hub.lease $lease; must be empty or positive integer.");
+        }
+
         $token = $this->arg('hub.verify_token', null);
 
-        common_log(LOG_DEBUG, __METHOD__ . ": checking sub'd to $feed $callback");
-        if ($this->getSub($feed, $callback)) {
-            // Already subscribed; return 204 per spec.
+        $secret = $this->arg('hub.secret', null);
+        if ($secret != '' && strlen($secret) >= 200) {
+            throw new ClientException("Invalid hub.secret $secret; must be under 200 bytes.");
+        }
+
+        $sub = HubSub::staticGet($sub->topic, $sub->callback);
+        if (!$sub) {
+            // Creating a new one!
+            $sub = new HubSub();
+            $sub->topic = $topic;
+            $sub->callback = $callback;
+        }
+        if ($mode == 'subscribe') {
+            if ($secret) {
+                $sub->secret = $secret;
+            }
+            if ($lease) {
+                $sub->setLease(intval($lease));
+            }
+        }
+
+        if (!common_config('queue', 'enabled')) {
+            // Won't be able to background it.
+            $verify = 'sync';
+        }
+        if ($verify == 'async') {
+            $sub->scheduleVerify($mode, $token);
+            header('HTTP/1.1 202 Accepted');
+        } else {
+            $sub->verify($mode, $token);
             header('HTTP/1.1 204 No Content');
-            common_log(LOG_DEBUG, __METHOD__ . ': already subscribed');
-            return;
         }
-
-        common_log(LOG_DEBUG, __METHOD__ . ': setting up');
-        $sub = new HubSub();
-        $sub->topic = $feed;
-        $sub->callback = $callback;
-        $sub->secret = $this->arg('hub.secret', null);
-        if (strlen($sub->secret) > 200) {
-            throw new ClientException("hub.secret must be no longer than 200 chars", 400);
-        }
-        $sub->setLease(intval($this->arg('hub.lease_seconds')));
-
-        // @fixme check for feeds we don't manage
-        // @fixme check the verification mode, might want a return immediately?
-
-        common_log(LOG_DEBUG, __METHOD__ . ': inserting');
-        $ok = $sub->insert();
-        
-        if (!$ok) {
-            throw new ServerException("Failed to save subscription record", 500);
-        }
-
-        // @fixme check errors ;)
-
-        $data = array('sub' => $sub, 'mode' => 'subscribe', 'token' => $token);
-        $qm = QueueManager::get();
-        $qm->enqueue($data, 'hubverify');
-        
-        header('HTTP/1.1 202 Accepted');
-        common_log(LOG_DEBUG, __METHOD__ . ': done');
     }
 
     /**
-     * Process a PuSH feed unsubscription request.
+     * Check whether the given URL represents one of our canonical
+     * user or group Atom feeds.
      *
-     * HTTP return codes:
-     *   202 Accepted - request saved and awaiting verification
-     *   204 No Content - already subscribed
-     *   400 Bad Request - invalid params or rejected feed
-     *
-     * @fixme background this
+     * @param string $feed URL
+     * @return boolean true if it matches
      */
-    function unsubscribe()
+    function recognizedFeed($feed)
     {
-        $feed = $this->argUrl('hub.topic');
-        $callback = $this->argUrl('hub.callback');
-        $sub = $this->getSub($feed, $callback);
-        
-        if ($sub) {
-            $token = $this->arg('hub.verify_token', null);
-            if ($sub->verify('unsubscribe', $token)) {
-                $sub->delete();
-                common_log(LOG_INFO, "PuSH unsubscribed $feed for $callback");
-            } else {
-                throw new ServerException("Failed PuSH unsubscription: verification failed! $feed for $callback");
+        $matches = array();
+        if (preg_match('!/(\d+)\.atom$!', $feed, $matches)) {
+            $id = $matches[1];
+            $params = array('id' => $id, 'format' => 'atom');
+            $userFeed = common_local_url('ApiTimelineUser', $params);
+            $groupFeed = common_local_url('ApiTimelineGroup', $params);
+
+            if ($feed == $userFeed) {
+                $user = User::staticGet('id', $id);
+                if (!$user) {
+                    throw new ClientException("Invalid hub.topic $feed; user doesn't exist.");
+                } else {
+                    return true;
+                }
             }
-        } else {
-            throw new ServerException("Failed PuSH unsubscription: not subscribed! $feed for $callback");
+            if ($feed == $groupFeed) {
+                $user = User_group::staticGet('id', $id);
+                if (!$user) {
+                    throw new ClientException("Invalid hub.topic $feed; group doesn't exist.");
+                } else {
+                    return true;
+                }
+            }
+            common_log(LOG_DEBUG, "Not a user or group feed? $feed $userFeed $groupFeed");
         }
+        common_log(LOG_DEBUG, "LOST $feed");
+        return false;
     }
 
     /**
      * Grab and validate a URL from POST parameters.
-     * @throws ServerException for malformed or non-http/https URLs
+     * @throws ClientException for malformed or non-http/https URLs
      */
     protected function argUrl($arg)
     {
@@ -164,7 +183,7 @@ class PushHubAction extends Action
         if (Validate::uri($url, $params)) {
             return $url;
         } else {
-            throw new ServerException("Invalid URL passed for $arg: '$url'", 400);
+            throw new ClientException("Invalid URL passed for $arg: '$url'");
         }
     }
 
diff --git a/plugins/OStatus/classes/FeedSub.php b/plugins/OStatus/classes/FeedSub.php
index 31241d3de7..b848b6b1d3 100644
--- a/plugins/OStatus/classes/FeedSub.php
+++ b/plugins/OStatus/classes/FeedSub.php
@@ -291,10 +291,9 @@ class FeedSub extends Memcached_DataObject
             $headers = array('Content-Type: application/x-www-form-urlencoded');
             $post = array('hub.mode' => $mode,
                           'hub.callback' => $callback,
-                          'hub.verify' => 'async',
+                          'hub.verify' => 'sync',
                           'hub.verify_token' => $this->verify_token,
                           'hub.secret' => $this->secret,
-                          //'hub.lease_seconds' => 0,
                           'hub.topic' => $this->uri);
             $client = new HTTPClient();
             $response = $client->post($this->huburi, $headers, $post);
@@ -317,8 +316,8 @@ class FeedSub extends Memcached_DataObject
             common_log(LOG_ERR, __METHOD__ . ": error \"{$e->getMessage()}\" hitting hub $this->huburi subscribing to $this->uri");
 
             $orig = clone($this);
-            $this->verify_token = null;
-            $this->sub_state = null;
+            $this->verify_token = '';
+            $this->sub_state = 'inactive';
             $this->update($orig);
             unset($orig);
 
@@ -343,7 +342,7 @@ class FeedSub extends Memcached_DataObject
         } else {
             $this->sub_end = null;
         }
-        $this->lastupdate = common_sql_now();
+        $this->modified = common_sql_now();
 
         return $this->update($original);
     }
@@ -362,7 +361,7 @@ class FeedSub extends Memcached_DataObject
         $this->sub_state = '';
         $this->sub_start = '';
         $this->sub_end = '';
-        $this->lastupdate = common_sql_now();
+        $this->modified = common_sql_now();
 
         return $this->update($original);
     }
diff --git a/plugins/OStatus/classes/HubSub.php b/plugins/OStatus/classes/HubSub.php
index a81de68e69..eae2928c32 100644
--- a/plugins/OStatus/classes/HubSub.php
+++ b/plugins/OStatus/classes/HubSub.php
@@ -30,11 +30,11 @@ class HubSub extends Memcached_DataObject
     public $topic;
     public $callback;
     public $secret;
-    public $challenge;
     public $lease;
     public $sub_start;
     public $sub_end;
     public $created;
+    public $modified;
 
     public /*static*/ function staticGet($topic, $callback)
     {
@@ -61,11 +61,11 @@ class HubSub extends Memcached_DataObject
                      'topic' => DB_DATAOBJECT_STR + DB_DATAOBJECT_NOTNULL,
                      'callback' => DB_DATAOBJECT_STR + DB_DATAOBJECT_NOTNULL,
                      'secret' => DB_DATAOBJECT_STR,
-                     'challenge' => DB_DATAOBJECT_STR,
                      'lease' =>  DB_DATAOBJECT_INT,
                      'sub_start' => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME,
                      'sub_end' => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME,
-                     'created' => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME + DB_DATAOBJECT_NOTNULL);
+                     'created' => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME + DB_DATAOBJECT_NOTNULL,
+                     'modified' => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME + DB_DATAOBJECT_NOTNULL);
     }
 
     static function schemaDef()
@@ -82,8 +82,6 @@ class HubSub extends Memcached_DataObject
                                    255, false),
                      new ColumnDef('secret', 'text',
                                    null, true),
-                     new ColumnDef('challenge', 'varchar',
-                                   32, true),
                      new ColumnDef('lease', 'int',
                                    null, true),
                      new ColumnDef('sub_start', 'datetime',
@@ -91,6 +89,8 @@ class HubSub extends Memcached_DataObject
                      new ColumnDef('sub_end', 'datetime',
                                    null, true),
                      new ColumnDef('created', 'datetime',
+                                   null, false),
+                     new ColumnDef('modified', 'datetime',
                                    null, false));
     }
 
@@ -148,84 +148,105 @@ class HubSub extends Memcached_DataObject
     }
 
     /**
-     * Send a verification ping to subscriber
+     * Schedule a future verification ping to the subscriber.
+     * If queues are disabled, will be immediate.
+     *
      * @param string $mode 'subscribe' or 'unsubscribe'
      * @param string $token hub.verify_token value, if provided by client
      */
+    function scheduleVerify($mode, $token=null, $retries=null)
+    {
+        if ($retries === null) {
+            $retries = intval(common_config('ostatus', 'hub_retries'));
+        }
+        $data = array('sub' => clone($this),
+                      'mode' => $mode,
+                      'token' => $token,
+                      'retries' => $retries);
+        $qm = QueueManager::get();
+        $qm->enqueue($data, 'hubverify');
+    }
+
+    /**
+     * Send a verification ping to subscriber, and if confirmed apply the changes.
+     * This may create, update, or delete the database record.
+     *
+     * @param string $mode 'subscribe' or 'unsubscribe'
+     * @param string $token hub.verify_token value, if provided by client
+     * @throws ClientException on failure
+     */
     function verify($mode, $token=null)
     {
         assert($mode == 'subscribe' || $mode == 'unsubscribe');
 
-        // Is this needed? data object fun...
-        $clone = clone($this);
-        $clone->challenge = common_good_rand(16);
-        $clone->update($this);
-        $this->challenge = $clone->challenge;
-        unset($clone);
-
+        $challenge = common_good_rand(32);
         $params = array('hub.mode' => $mode,
                         'hub.topic' => $this->topic,
-                        'hub.challenge' => $this->challenge);
+                        'hub.challenge' => $challenge);
         if ($mode == 'subscribe') {
             $params['hub.lease_seconds'] = $this->lease;
         }
         if ($token !== null) {
             $params['hub.verify_token'] = $token;
         }
-        $url = $this->callback . '?' . http_build_query($params, '', '&'); // @fixme ugly urls
 
-        try {
-            $request = new HTTPClient();
-            $response = $request->get($url);
-            $status = $response->getStatus();
-
-            if ($status >= 200 && $status < 300) {
-                $fail = false;
-            } else {
-                // @fixme how can we schedule a second attempt?
-                // Or should we?
-                $fail = "Returned HTTP $status";
-            }
-        } catch (Exception $e) {
-            $fail = $e->getMessage();
-        }
-        if ($fail) {
-            // @fixme how can we schedule a second attempt?
-            // or save a fail count?
-            // Or should we?
-            common_log(LOG_ERR, "Failed to verify $mode for $this->topic at $this->callback: $fail");
-            return false;
+        // Any existing query string parameters must be preserved
+        $url = $this->callback;
+        if (strpos('?', $url) !== false) {
+            $url .= '&';
         } else {
-            if ($mode == 'subscribe') {
-                // Establish or renew the subscription!
-                // This seems unnecessary... dataobject fun!
-                $clone = clone($this);
-                $clone->challenge = null;
-                $clone->setLease($this->lease);
-                $clone->update($this);
-                unset($clone);
+            $url .= '?';
+        }
+        $url .= http_build_query($params, '', '&');
 
-                $this->challenge = null;
-                $this->setLease($this->lease);
-                common_log(LOG_ERR, "Verified $mode of $this->callback:$this->topic for $this->lease seconds");
-            } else if ($mode == 'unsubscribe') {
-                common_log(LOG_ERR, "Verified $mode of $this->callback:$this->topic");
-                $this->delete();
+        $request = new HTTPClient();
+        $response = $request->get($url);
+        $status = $response->getStatus();
+
+        if ($status >= 200 && $status < 300) {
+            common_log(LOG_INFO, "Verified $mode of $this->callback:$this->topic");
+        } else {
+            throw new ClientException("Hub subscriber verification returned HTTP $status");
+        }
+
+        $old = HubSub::staticGet($this->topic, $this->callback);
+        if ($mode == 'subscribe') {
+            if ($old) {
+                $this->update($old);
+            } else {
+                $ok = $this->insert();
+            }
+        } else if ($mode == 'unsubscribe') {
+            if ($old) {
+                $old->delete();
+            } else {
+                // That's ok, we're already unsubscribed.
             }
-            return true;
         }
     }
 
     /**
      * Insert wrapper; transparently set the hash key from topic and callback columns.
-     * @return boolean success
+     * @return mixed success
      */
     function insert()
     {
         $this->hashkey = self::hashkey($this->topic, $this->callback);
+        $this->created = common_sql_now();
+        $this->modified = common_sql_now();
         return parent::insert();
     }
 
+    /**
+     * Update wrapper; transparently update modified column.
+     * @return boolean success
+     */
+    function update($old=null)
+    {
+        $this->modified = common_sql_now();
+        return parent::update($old);
+    }
+
     /**
      * Schedule delivery of a 'fat ping' to the subscriber's callback
      * endpoint. If queues are disabled, this will run immediately.

From be70dd3677242fe46d41a0a8882abe6e46428b5f Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 21:57:09 -0500
Subject: [PATCH 16/97] work harder to preserve info when creating new
 Ostatus_profile

---
 plugins/OStatus/classes/Ostatus_profile.php | 67 +++++++++++++++++----
 1 file changed, 54 insertions(+), 13 deletions(-)

diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 700168c118..3bed1c2aa0 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -522,7 +522,7 @@ class Ostatus_profile extends Memcached_DataObject
      * @return Ostatus_profile
      * @throws FeedSubException
      */
-    public static function ensureProfile($profile_uri)
+    public static function ensureProfile($profile_uri, $hints=array())
     {
         // Get the canonical feed URI and check it
         $discover = new FeedDiscovery();
@@ -545,7 +545,7 @@ class Ostatus_profile extends Memcached_DataObject
 
         if (!empty($subject)) {
             $subjObject = new ActivityObject($subject);
-            return self::ensureActivityObjectProfile($subjObject, $feeduri, $salmonuri);
+            return self::ensureActivityObjectProfile($subjObject, $feeduri, $salmonuri, $hints);
         }
 
         // Otherwise, try the feed author
@@ -554,7 +554,7 @@ class Ostatus_profile extends Memcached_DataObject
 
         if (!empty($author)) {
             $authorObject = new ActivityObject($author);
-            return self::ensureActivityObjectProfile($authorObject, $feeduri, $salmonuri);
+            return self::ensureActivityObjectProfile($authorObject, $feeduri, $salmonuri, $hints);
         }
 
         // Sheesh. Not a very nice feed! Let's try fingerpoken in the
@@ -570,7 +570,7 @@ class Ostatus_profile extends Memcached_DataObject
 
             if (!empty($actor)) {
                 $actorObject = new ActivityObject($actor);
-                return self::ensureActivityObjectProfile($actorObject, $feeduri, $salmonuri);
+                return self::ensureActivityObjectProfile($actorObject, $feeduri, $salmonuri, $hints);
 
             }
 
@@ -578,7 +578,7 @@ class Ostatus_profile extends Memcached_DataObject
 
             if (!empty($author)) {
                 $authorObject = new ActivityObject($author);
-                return self::ensureActivityObjectProfile($authorObject, $feeduri, $salmonuri);
+                return self::ensureActivityObjectProfile($authorObject, $feeduri, $salmonuri, $hints);
             }
         }
 
@@ -688,11 +688,11 @@ class Ostatus_profile extends Memcached_DataObject
         return self::ensureActivityObjectProfile($activity->actor, $feeduri, $salmonuri);
     }
 
-    public static function ensureActivityObjectProfile($object, $feeduri=null, $salmonuri=null)
+    public static function ensureActivityObjectProfile($object, $feeduri=null, $salmonuri=null, $hints=array())
     {
         $profile = self::getActivityObjectProfile($object);
         if (!$profile) {
-            $profile = self::createActivityObjectProfile($object, $feeduri, $salmonuri);
+            $profile = self::createActivityObjectProfile($object, $feeduri, $salmonuri, $hints);
         }
         return $profile;
     }
@@ -745,10 +745,10 @@ class Ostatus_profile extends Memcached_DataObject
         self::createActivityObjectProfile($actor, $feeduri, $salmonuri);
     }
 
-    protected static function createActivityObjectProfile($object, $feeduri=null, $salmonuri=null)
+    protected static function createActivityObjectProfile($object, $feeduri=null, $salmonuri=null, $hints=array())
     {
         $homeuri  = $object->id;
-        $nickname = self::getActivityObjectNickname($object);
+        $nickname = self::getActivityObjectNickname($object, $hints);
         $avatar   = self::getActivityObjectAvatar($object);
 
         if (!$homeuri) {
@@ -756,6 +756,18 @@ class Ostatus_profile extends Memcached_DataObject
             throw new ServerException("No profile URI");
         }
 
+        if (empty($feeduri)) {
+            if (array_key_exists('feedurl', $hints)) {
+                $feeduri = $hints['feedurl'];
+            }
+        }
+
+        if (empty($salmonuri)) {
+            if (array_key_exists('salmon', $hints)) {
+                $salmonuri = $hints['salmon'];
+            }
+        }
+
         if (!$feeduri || !$salmonuri) {
             // Get the canonical feed URI and check it
             $discover = new FeedDiscovery();
@@ -773,7 +785,11 @@ class Ostatus_profile extends Memcached_DataObject
         $profile = new Profile();
         $profile->nickname   = $nickname;
         $profile->fullname   = $object->title;
-        $profile->profileurl = $object->link;
+        if (!empty($object->link)) {
+            $profile->profileurl = $object->link;
+        } else if (array_key_exists('profileurl', $hints)) {
+            $profile->profileurl = $hints['profileurl'];
+        }
         $profile->created    = common_sql_now();
 
         // @fixme bio
@@ -812,12 +828,24 @@ class Ostatus_profile extends Memcached_DataObject
         }
     }
 
-    protected static function getActivityObjectNickname($object)
+    protected static function getActivityObjectNickname($object, $hints=array())
     {
         // XXX: check whatever PoCo calls a nickname first
 
+        // Try the definitive ID
+
         $nickname = self::nicknameFromURI($object->id);
 
+        // Try a Webfinger if one was passed (way) down
+
+        if (empty($nickname)) {
+            if (array_key_exists('webfinger', $hints)) {
+                $nickname = self::nicknameFromURI($hints['webfinger']);
+            }
+        }
+
+        // Try the name
+
         if (empty($nickname)) {
             $nickname = common_nicknamize($object->title);
         }
@@ -883,11 +911,16 @@ class Ostatus_profile extends Memcached_DataObject
             }
         }
 
+        $hints = array('webfinger' => $addr,
+                       'profileurl' => $profileUrl,
+                       'feedurl' => $feedUrl,
+                       'salmon' => $salmonEndpoint);
+
         // If we got a feed URL, try that
 
         if (isset($feedUrl)) {
             try {
-                $oprofile = self::ensureProfile($feedUrl);
+                $oprofile = self::ensureProfile($feedUrl, $hints);
                 return $oprofile;
             } catch (Exception $e) {
                 common_log(LOG_WARNING, "Failed creating profile from feed URL '$feedUrl': " . $e->getMessage());
@@ -899,7 +932,7 @@ class Ostatus_profile extends Memcached_DataObject
 
         if (isset($profileUrl)) {
             try {
-                $oprofile = self::ensureProfile($profileUrl);
+                $oprofile = self::ensureProfile($profileUrl, $hints);
                 return $oprofile;
             } catch (Exception $e) {
                 common_log(LOG_WARNING, "Failed creating profile from profile URL '$profileUrl': " . $e->getMessage());
@@ -922,6 +955,10 @@ class Ostatus_profile extends Memcached_DataObject
             $profile->nickname = self::nicknameFromUri($uri);
             $profile->created  = common_sql_now();
 
+            if (isset($profileUrl)) {
+                $profile->profileurl = $profileUrl;
+            }
+
             $profile_id = $profile->insert();
 
             if (!$profile_id) {
@@ -936,6 +973,10 @@ class Ostatus_profile extends Memcached_DataObject
             $oprofile->profile_id = $profile_id;
             $oprofile->created    = common_sql_now();
 
+            if (isset($feedUrl)) {
+                $profile->feeduri = $feedUrl;
+            }
+
             $result = $oprofile->insert();
 
             if (!$result) {

From ad10e6e8da5d1bc238fb90d7d9ef168c2525ceb4 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Sun, 21 Feb 2010 19:01:32 -0800
Subject: [PATCH 17/97] OStatus: drop the remnants of feedsubsettings, replaced
 by ostatussub and no longer linked in UI

---
 plugins/OStatus/OStatusPlugin.php           |   2 -
 plugins/OStatus/actions/feedsubsettings.php | 230 --------------------
 2 files changed, 232 deletions(-)
 delete mode 100644 plugins/OStatus/actions/feedsubsettings.php

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 60bb144a83..304cf14aef 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -58,8 +58,6 @@ class OStatusPlugin extends Plugin
         $m->connect('main/push/callback/:feed',
                     array('action' => 'pushcallback'),
                     array('feed' => '[0-9]+'));
-        $m->connect('settings/feedsub',
-                    array('action' => 'feedsubsettings'));
 
         // Salmon endpoint
         $m->connect('main/salmon/user/:id',
diff --git a/plugins/OStatus/actions/feedsubsettings.php b/plugins/OStatus/actions/feedsubsettings.php
deleted file mode 100644
index aee4cee9af..0000000000
--- a/plugins/OStatus/actions/feedsubsettings.php
+++ /dev/null
@@ -1,230 +0,0 @@
-<?php
-/*
- * StatusNet - the distributed open-source microblogging tool
- * Copyright (C) 2009, StatusNet, Inc.
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-/**
- * @package FeedSubPlugin
- * @maintainer Brion Vibber <brion@status.net>
- */
-
-if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
-
-class FeedSubSettingsAction extends ConnectSettingsAction
-{
-    protected $profile_uri;
-    protected $preview;
-    protected $munger;
-
-    /**
-     * Title of the page
-     *
-     * @return string Title of the page
-     */
-
-    function title()
-    {
-        return _m('Feed subscriptions');
-    }
-
-    /**
-     * Instructions for use
-     *
-     * @return instructions for use
-     */
-
-    function getInstructions()
-    {
-        return _m('You can subscribe to feeds from other sites; ' .
-                  'updates will appear in your personal timeline.');
-    }
-
-    /**
-     * Content area of the page
-     *
-     * Shows a form for associating a Twitter account with this
-     * StatusNet account. Also lets the user set preferences.
-     *
-     * @return void
-     */
-
-    function showContent()
-    {
-        $user = common_current_user();
-
-        $profile = $user->getProfile();
-
-        $this->elementStart('form', array('method' => 'post',
-                                          'id' => 'form_settings_feedsub',
-                                          'class' => 'form_settings',
-                                          'action' =>
-                                          common_local_url('feedsubsettings')));
-
-        $this->hidden('token', common_session_token());
-
-        $this->elementStart('fieldset', array('id' => 'settings_feeds'));
-
-        $this->elementStart('ul', 'form_data');
-        $this->elementStart('li', array('id' => 'settings_twitter_login_button'));
-        $this->input('profile_uri',
-                     _m('Feed URL'),
-                     $this->profile_uri,
-                     _m('Enter the profile URL of a PubSubHubbub-enabled feed'));
-        $this->elementEnd('li');
-        $this->elementEnd('ul');
-
-        if ($this->preview) {
-            $this->submit('subscribe', _m('Subscribe'));
-        } else {
-            $this->submit('validate', _m('Continue'));
-        }
-
-        $this->elementEnd('fieldset');
-
-        $this->elementEnd('form');
-
-        if ($this->preview) {
-            $this->previewFeed();
-        }
-    }
-
-    /**
-     * Handle posts to this form
-     *
-     * Based on the button that was pressed, muxes out to other functions
-     * to do the actual task requested.
-     *
-     * All sub-functions reload the form with a message -- success or failure.
-     *
-     * @return void
-     */
-
-    function handlePost()
-    {
-        // CSRF protection
-        $token = $this->trimmed('token');
-        if (!$token || $token != common_session_token()) {
-            $this->showForm(_('There was a problem with your session token. '.
-                              'Try again, please.'));
-            return;
-        }
-
-        if ($this->arg('validate')) {
-            $this->validateAndPreview();
-        } else if ($this->arg('subscribe')) {
-            $this->saveFeed();
-        } else {
-            $this->showForm(_('Unexpected form submission.'));
-        }
-    }
-
-    /**
-     * Set up and add a feed
-     *
-     * @return boolean true if feed successfully read
-     * Sends you back to input form if not.
-     */
-    function validateFeed()
-    {
-        $profile_uri = trim($this->arg('profile_uri'));
-        
-        if ($profile_uri == '') {
-            $this->showForm(_m('Empty remote profile URL!'));
-            return;
-        }
-        $this->profile_uri = $profile_uri;
-        
-        // @fixme validate, normalize bla bla
-        try {
-            $oprofile = Ostatus_profile::ensureProfile($this->profile_uri);
-            $this->oprofile = $oprofile;
-            return true;
-        } catch (FeedSubBadURLException $e) {
-            $err = _m('Invalid URL or could not reach server.');
-        } catch (FeedSubBadResponseException $e) {
-            $err = _m('Cannot read feed; server returned error.');
-        } catch (FeedSubEmptyException $e) {
-            $err = _m('Cannot read feed; server returned an empty page.');
-        } catch (FeedSubBadHTMLException $e) {
-            $err = _m('Bad HTML, could not find feed link.');
-        } catch (FeedSubNoFeedException $e) {
-            $err = _m('Could not find a feed linked from this URL.');
-        } catch (FeedSubUnrecognizedTypeException $e) {
-            $err = _m('Not a recognized feed type.');
-        } catch (FeedSubException $e) {
-            // Any new ones we forgot about
-            $err = sprintf(_m('Bad feed URL: %s %s'), get_class($e), $e->getMessage());
-        }
-
-        $this->showForm($err);
-        return false;
-    }
-
-    function saveFeed()
-    {
-        if ($this->validateFeed()) {
-            $this->preview = true;
-
-            // And subscribe the current user to the local profile
-            $user = common_current_user();
-
-            if (!$this->oprofile->subscribe()) {
-                $this->showForm(_m("Failed to set up server-to-server subscription."));
-                return;
-            }
-
-            if ($this->oprofile->isGroup()) {
-                $group = $this->oprofile->localGroup();
-                if ($user->isMember($group)) {
-                    $this->showForm(_m('Already a member!'));
-                } elseif (Group_member::join($this->profile->group_id, $user->id)) {
-                    $this->showForm(_m('Joined remote group!'));
-                } else {
-                    $this->showForm(_m('Remote group join failed!'));
-                }
-            } else {
-                $local = $this->oprofile->localProfile();
-                if ($user->isSubscribed($local)) {
-                    $this->showForm(_m('Already subscribed!'));
-                } elseif ($this->oprofile->subscribeLocalToRemote($user)) {
-                    $this->showForm(_m('Remote user subscribed!'));
-                } else {
-                    $this->showForm(_m('Remote subscription failed!'));
-                }
-            }
-        }
-    }
-
-    function validateAndPreview()
-    {
-        if ($this->validateFeed()) {
-            $this->preview = true;
-            $this->showForm(_m('Previewing feed:'));
-        }
-    }
-
-    function previewFeed()
-    {
-        $this->text('Profile preview should go here');
-    }
-
-    function showScripts()
-    {
-        parent::showScripts();
-        $this->autofocus('feedurl');
-    }
-}

From bd21f48ceed83699ca4c4613805b1edc1bf49f8c Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 22:34:40 -0500
Subject: [PATCH 18/97] Notice::getReplies() returns array of profile IDs

---
 plugins/OStatus/OStatusPlugin.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 60bb144a83..fdc07b813f 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -201,9 +201,9 @@ class OStatusPlugin extends Plugin
     {
         $mentioned = $notice->getReplies();
 
-        foreach ($mentioned as $profile) {
+        foreach ($mentioned as $profile_id) {
 
-            $oprofile = Ostatus_profile::staticGet('profile_id', $profile->id);
+            $oprofile = Ostatus_profile::staticGet('profile_id', $profile_id);
 
             if (!empty($oprofile) && !empty($oprofile->salmonuri)) {
 

From de522d7978e0a843e338561b35a98b3e47a1e93c Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 22:38:18 -0500
Subject: [PATCH 19/97] Wasn't putting in namespaces for reply salmons

---
 plugins/OStatus/OStatusPlugin.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index ec6f3f3b0a..641765daeb 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -208,7 +208,7 @@ class OStatusPlugin extends Plugin
                 // FIXME: this needs to go out in a queue handler
 
                 $xml = '<?xml version="1.0" encoding="UTF-8" ?>';
-                $xml .= $notice->asAtomEntry();
+                $xml .= $notice->asAtomEntry(true, true);
 
                 $salmon = new Salmon();
                 $salmon->post($oprofile->salmonuri, $xml);

From 13fb7bef783faae497069485546b92b897662987 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 22:41:02 -0500
Subject: [PATCH 20/97] reversed in_array() arguments in UsersalmonAction

---
 plugins/OStatus/actions/usersalmon.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/OStatus/actions/usersalmon.php b/plugins/OStatus/actions/usersalmon.php
index 12c74798f2..3c0f72855b 100644
--- a/plugins/OStatus/actions/usersalmon.php
+++ b/plugins/OStatus/actions/usersalmon.php
@@ -80,7 +80,7 @@ class UsersalmonAction extends SalmonAction
                 throw new ClientException("In reply to a notice not by this user");
             }
         } else if (!empty($context->attention)) {
-            if (!in_array($context->attention, $this->user->uri)) {
+            if (!in_array($this->user->uri, $context->attention)) {
                 throw new ClientException("To the attention of user(s) not including this one!");
             }
         } else {

From 232b5efa7e5d2771ef50b8a5da90147bbff7af3f Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 22:44:58 -0500
Subject: [PATCH 21/97] Add error info for missing URI in attention

---
 plugins/OStatus/actions/usersalmon.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/plugins/OStatus/actions/usersalmon.php b/plugins/OStatus/actions/usersalmon.php
index 3c0f72855b..ca0370bb4e 100644
--- a/plugins/OStatus/actions/usersalmon.php
+++ b/plugins/OStatus/actions/usersalmon.php
@@ -81,6 +81,7 @@ class UsersalmonAction extends SalmonAction
             }
         } else if (!empty($context->attention)) {
             if (!in_array($this->user->uri, $context->attention)) {
+                common_log(LOG_ERR, "{$this->user->uri} not in attention list (".implode(',', $context->attention).")");
                 throw new ClientException("To the attention of user(s) not including this one!");
             }
         } else {

From a745d38d6d1ff336898b24decb54549c72ad1f99 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 22:52:27 -0500
Subject: [PATCH 22/97] slight rearrangement of getting profile URIs

---
 classes/Profile.php | 22 ++++++++--------------
 1 file changed, 8 insertions(+), 14 deletions(-)

diff --git a/classes/Profile.php b/classes/Profile.php
index 6b396c8c34..5ff746e309 100644
--- a/classes/Profile.php
+++ b/classes/Profile.php
@@ -841,28 +841,22 @@ class Profile extends Memcached_DataObject
     {
         $uri = null;
 
-        // check for a local user first
-        $user = User::staticGet('id', $this->id);
+        // give plugins a chance to set the URI
+        if (Event::handle('StartGetProfileUri', array($this, &$uri))) {
 
-        if (!empty($user)) {
-            $uri = common_local_url(
-                'userbyid',
-                array('id' => $user->id)
-            );
-        } else {
-
-            // give plugins a chance to set the URI
-            if (Event::handle('StartGetProfileUri', array($this, &$uri))) {
+            // check for a local user first
+            $user = User::staticGet('id', $this->id);
 
+            if (!empty($user)) {
+                $uri = $user->uri;
+            } else {
                 // return OMB profile if any
                 $remote = Remote_profile::staticGet('id', $this->id);
-
                 if (!empty($remote)) {
                     $uri = $remote->uri;
                 }
-
-                Event::handle('EndGetProfileUri', array($this, &$uri));
             }
+            Event::handle('EndGetProfileUri', array($this, &$uri));
         }
 
         return $uri;

From cc18f757a8e6ef854cae89d8947efac505b1fd7c Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 22:52:52 -0500
Subject: [PATCH 23/97] hook in OStatusPlugin to return Ostatus_profile URIs
 where applicable

---
 plugins/OStatus/OStatusPlugin.php | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 641765daeb..a8c292301d 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -484,4 +484,14 @@ class OStatusPlugin extends Plugin
 
         return true;
     }
+
+    function onStartGetProfileUri($profile, &$uri)
+    {
+        $oprofile = Ostatus_profile::staticGet('profile_id', $profile->id);
+        if (!empty($oprofile)) {
+            $uri = $oprofile->uri;
+            return false;
+        }
+        return true;
+    }
 }

From 5207783765328a3d6f0101f143edb8807247bcfe Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Sun, 21 Feb 2010 19:51:11 -0800
Subject: [PATCH 24/97] OStatus: record source profile & saving method in
 ostatus_source table; this allows us to distinguish posts that have come
 through an unverified group feed

---
 plugins/OStatus/OStatusPlugin.php           |   1 +
 plugins/OStatus/classes/Ostatus_profile.php |   4 +-
 plugins/OStatus/classes/Ostatus_source.php  | 114 ++++++++++++++++++++
 plugins/OStatus/lib/salmonaction.php        |  13 ++-
 4 files changed, 127 insertions(+), 5 deletions(-)
 create mode 100644 plugins/OStatus/classes/Ostatus_source.php

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 641765daeb..5b9e3be2bc 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -305,6 +305,7 @@ class OStatusPlugin extends Plugin
     function onCheckSchema() {
         $schema = Schema::get();
         $schema->ensureTable('ostatus_profile', Ostatus_profile::schemaDef());
+        $schema->ensureTable('ostatus_source', Ostatus_source::schemaDef());
         $schema->ensureTable('feedsub', FeedSub::schemaDef());
         $schema->ensureTable('hubsub', HubSub::schemaDef());
         return true;
diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 3bed1c2aa0..71885bcdce 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -508,13 +508,15 @@ class Ostatus_profile extends Memcached_DataObject
             }
         }
 
-        // @fixme save detailed ostatus source info
         // @fixme ensure that groups get handled correctly
 
         $saved = Notice::saveNew($oprofile->localProfile()->id,
                                  $content,
                                  'ostatus',
                                  $params);
+
+        // Record which feed this came through...
+        Ostatus_source::saveNew($saved, $this, 'push');
     }
 
     /**
diff --git a/plugins/OStatus/classes/Ostatus_source.php b/plugins/OStatus/classes/Ostatus_source.php
new file mode 100644
index 0000000000..e6ce7d442b
--- /dev/null
+++ b/plugins/OStatus/classes/Ostatus_source.php
@@ -0,0 +1,114 @@
+<?php
+/*
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @package OStatusPlugin
+ * @maintainer Brion Vibber <brion@status.net>
+ */
+
+class Ostatus_source extends Memcached_DataObject
+{
+    public $__table = 'ostatus_source';
+
+    public $notice_id; // notice we're referring to
+    public $profile_uri; // uri of the ostatus_profile this came through -- may be a group feed
+    public $method; // push or salmon
+
+    public /*static*/ function staticGet($k, $v=null)
+    {
+        return parent::staticGet(__CLASS__, $k, $v);
+    }
+
+    /**
+     * return table definition for DB_DataObject
+     *
+     * DB_DataObject needs to know something about the table to manipulate
+     * instances. This method provides all the DB_DataObject needs to know.
+     *
+     * @return array array of column definitions
+     */
+
+    function table()
+    {
+        return array('notice_id' => DB_DATAOBJECT_INT + DB_DATAOBJECT_NOTNULL,
+                     'profile_uri' => DB_DATAOBJECT_STR,
+                     'method' => DB_DATAOBJECT_STR);
+    }
+
+    static function schemaDef()
+    {
+        return array(new ColumnDef('notice_id', 'integer',
+                                   null, false, 'PRI'),
+                     new ColumnDef('profile_uri', 'varchar',
+                                   255, false),
+                     new ColumnDef('method', "ENUM('push','salmon')",
+                                   null, false));
+    }
+
+    /**
+     * return key definitions for DB_DataObject
+     *
+     * DB_DataObject needs to know about keys that the table has; this function
+     * defines them.
+     *
+     * @return array key definitions
+     */
+
+    function keys()
+    {
+        return array_keys($this->keyTypes());
+    }
+
+    /**
+     * return key definitions for Memcached_DataObject
+     *
+     * Our caching system uses the same key definitions, but uses a different
+     * method to get them.
+     *
+     * @return array key definitions
+     */
+
+    function keyTypes()
+    {
+        return array('notice_id' => 'K');
+    }
+
+    function sequenceKey()
+    {
+        return array(false, false, false);
+    }
+
+    /**
+     * Save a remote notice source record; this helps indicate how trusted we are.
+     * @param string $method
+     */
+    public static function saveNew(Notice $notice, Ostatus_profile $oprofile, $method)
+    {
+        $osource = new Ostatus_source();
+        $osource->notice_id = $notice->id;
+        $osource->profile_uri = $oprofile->uri;
+        $osource->method = $method;
+        if ($osource->insert()) {
+           return true;
+        } else {
+            common_log_db_error($osource, 'INSERT', __FILE__);
+            return false;
+        }
+    }
+}
diff --git a/plugins/OStatus/lib/salmonaction.php b/plugins/OStatus/lib/salmonaction.php
index 11c411c7db..d93cc9aa4a 100644
--- a/plugins/OStatus/lib/salmonaction.php
+++ b/plugins/OStatus/lib/salmonaction.php
@@ -202,9 +202,14 @@ class SalmonAction extends Action
             $options['created'] = common_sql_time($this->act->time);
         }
 
-        return Notice::saveNew($oprofile->profile_id,
-                               $content,
-                               'ostatus+salmon',
-                               $options);
+        $saved = Notice::saveNew($oprofile->profile_id,
+                                 $content,
+                                 'ostatus+salmon',
+                                 $options);
+
+        // Record that this was saved through a validated Salmon source
+        // @fixme actually do the signature validation!
+        Ostatus_source::saveNew($saved, $oprofile, 'salmon');
+        return $saved;
     }
 }

From 17c329ba89f575c7fcbf05522a0cf50db6d6a74a Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 23:07:46 -0500
Subject: [PATCH 25/97] add HTMLPurifier config

---
 plugins/OStatus/lib/salmonaction.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/plugins/OStatus/lib/salmonaction.php b/plugins/OStatus/lib/salmonaction.php
index 11c411c7db..8734223c62 100644
--- a/plugins/OStatus/lib/salmonaction.php
+++ b/plugins/OStatus/lib/salmonaction.php
@@ -173,7 +173,10 @@ class SalmonAction extends Action
 
         $html = $this->act->object->content;
 
-        $rendered = HTMLPurifier::purify($html);
+        $htmlConfig = HTMLPurifier_Config::createDefault();
+
+        $rendered = HTMLPurifier::purify($html, $htmlConfig);
+
         $content = html_entity_decode(strip_tags($rendered));
 
         $options = array('is_local' => Notice::REMOTE_OMB,

From e39e6cdcc590a5330ab5a20a2519346bfc7965e0 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 23:16:42 -0500
Subject: [PATCH 26/97] was using HTMLPurifier::purify() as a static method,
 which it is not

---
 plugins/OStatus/lib/salmonaction.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/plugins/OStatus/lib/salmonaction.php b/plugins/OStatus/lib/salmonaction.php
index 273be588b6..08bfa332fa 100644
--- a/plugins/OStatus/lib/salmonaction.php
+++ b/plugins/OStatus/lib/salmonaction.php
@@ -173,9 +173,9 @@ class SalmonAction extends Action
 
         $html = $this->act->object->content;
 
-        $htmlConfig = HTMLPurifier_Config::createDefault();
+        $purifier = new HTMLPurifier();
 
-        $rendered = HTMLPurifier::purify($html, $htmlConfig);
+        $rendered = $purifier->purify($html);
 
         $content = html_entity_decode(strip_tags($rendered));
 

From 48839a1fcf0c94b877c7c3232cf3e34eb0a9f23e Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 23:19:29 -0500
Subject: [PATCH 27/97] change erroneous common_sql_time() to common_sql_date()

---
 plugins/OStatus/lib/salmonaction.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/OStatus/lib/salmonaction.php b/plugins/OStatus/lib/salmonaction.php
index 08bfa332fa..b128cbd13f 100644
--- a/plugins/OStatus/lib/salmonaction.php
+++ b/plugins/OStatus/lib/salmonaction.php
@@ -202,7 +202,7 @@ class SalmonAction extends Action
         }
 
         if (!empty($this->act->time)) {
-            $options['created'] = common_sql_time($this->act->time);
+            $options['created'] = common_sql_date($this->act->time);
         }
 
         $saved = Notice::saveNew($oprofile->profile_id,

From e4c4f90c8a303e566fa117fadb0004694b89ccc8 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 23:32:20 -0500
Subject: [PATCH 28/97] don't save Notices that already exist in Salmon

---
 plugins/OStatus/actions/usersalmon.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/plugins/OStatus/actions/usersalmon.php b/plugins/OStatus/actions/usersalmon.php
index ca0370bb4e..8368eeccf0 100644
--- a/plugins/OStatus/actions/usersalmon.php
+++ b/plugins/OStatus/actions/usersalmon.php
@@ -88,6 +88,12 @@ class UsersalmonAction extends SalmonAction
             throw new ClientException("Not to anyone in reply to anything!");
         }
 
+        $existing = Notice::staticGet('uri', $this->act->object->id);
+
+        if (!empty($existing)) {
+            common_log(LOG_ERR, "Not saving notice '{$existing->uri}'; already exists.");
+        }
+
         $this->saveNotice();
     }
 

From a9599d53c5e33eff2927f02393b9ae6984ba3a6e Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 23:39:52 -0500
Subject: [PATCH 29/97] some info code for usersalmon.php

---
 plugins/OStatus/OStatusPlugin.php      | 2 ++
 plugins/OStatus/actions/usersalmon.php | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 548c877118..3ac2bb87d7 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -205,6 +205,8 @@ class OStatusPlugin extends Plugin
 
             if (!empty($oprofile) && !empty($oprofile->salmonuri)) {
 
+                common_log(LOG_INFO, "Sending notice '{$notice->uri}' to remote profile '{$oprofile->uri}'.");
+
                 // FIXME: this needs to go out in a queue handler
 
                 $xml = '<?xml version="1.0" encoding="UTF-8" ?>';
diff --git a/plugins/OStatus/actions/usersalmon.php b/plugins/OStatus/actions/usersalmon.php
index 8368eeccf0..c8a16e06fa 100644
--- a/plugins/OStatus/actions/usersalmon.php
+++ b/plugins/OStatus/actions/usersalmon.php
@@ -55,6 +55,8 @@ class UsersalmonAction extends SalmonAction
      */
     function handlePost()
     {
+        common_log(LOG_INFO, "Received post of '{$this->act->object->id}' from '{$this->act->actor->id}'");
+
         switch ($this->act->object->type) {
         case ActivityObject::ARTICLE:
         case ActivityObject::BLOGENTRY:
@@ -92,6 +94,7 @@ class UsersalmonAction extends SalmonAction
 
         if (!empty($existing)) {
             common_log(LOG_ERR, "Not saving notice '{$existing->uri}'; already exists.");
+            return;
         }
 
         $this->saveNotice();

From 891e0028838e51788e917d947cc280dbd53c1792 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Sun, 21 Feb 2010 23:56:48 -0500
Subject: [PATCH 30/97] don't calculate replies for remote notices

---
 classes/Notice.php                   | 27 +++++++++++++++++++++++++++
 lib/distribqueuehandler.php          |  4 ++--
 plugins/OStatus/lib/salmonaction.php |  3 ++-
 3 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/classes/Notice.php b/classes/Notice.php
index 6f1ef81fc5..a12839d729 100644
--- a/classes/Notice.php
+++ b/classes/Notice.php
@@ -333,8 +333,15 @@ class Notice extends Memcached_DataObject
 
         # Clear the cache for subscribed users, so they'll update at next request
         # XXX: someone clever could prepend instead of clearing the cache
+
         $notice->blowOnInsert();
 
+        if (isset($replies)) {
+            $notice->saveKnownReplies($replies);
+        } else {
+            $notice->saveReplies();
+        }
+
         $notice->distribute();
 
         return $notice;
@@ -817,6 +824,26 @@ class Notice extends Memcached_DataObject
         return true;
     }
 
+    function saveKnownReplies($uris)
+    {
+        foreach ($uris as $uri) {
+
+            $user = User::staticGet('uri', $uri);
+
+            if (!empty($user)) {
+
+                $reply = new Reply();
+
+                $reply->notice_id  = $this->id;
+                $reply->profile_id = $user->id;
+
+                $id = $reply->insert();
+            }
+        }
+
+        return;
+    }
+
     /**
      * @return array of integer profile IDs
      */
diff --git a/lib/distribqueuehandler.php b/lib/distribqueuehandler.php
index 4477468d0a..c31b675c1a 100644
--- a/lib/distribqueuehandler.php
+++ b/lib/distribqueuehandler.php
@@ -75,7 +75,7 @@ class DistribQueueHandler
         }
 
         try {
-            $recipients = $notice->saveReplies();
+            $recipients = $notice->getReplies();
         } catch (Exception $e) {
             $this->logit($notice, $e);
         }
@@ -107,7 +107,7 @@ class DistribQueueHandler
 
         return true;
     }
-    
+
     protected function logit($notice, $e)
     {
         common_log(LOG_ERR, "Distrib queue exception saving notice $notice->id: " .
diff --git a/plugins/OStatus/lib/salmonaction.php b/plugins/OStatus/lib/salmonaction.php
index b128cbd13f..4aba20cc40 100644
--- a/plugins/OStatus/lib/salmonaction.php
+++ b/plugins/OStatus/lib/salmonaction.php
@@ -182,7 +182,8 @@ class SalmonAction extends Action
         $options = array('is_local' => Notice::REMOTE_OMB,
                          'uri' => $this->act->object->id,
                          'url' => $this->act->object->link,
-                         'rendered' => $rendered);
+                         'rendered' => $rendered,
+                         'replies' => $this->act->context->attention);
 
         if (!empty($this->act->context->location)) {
             $options['lat'] = $location->lat;

From 17ed30dffc1c05259baf2f0387089547e39684d7 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Mon, 22 Feb 2010 06:00:13 +0000
Subject: [PATCH 31/97] OStatus: fix remote subscription when putting webfinger
 address in the little box

---
 plugins/OStatus/actions/ostatusinit.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/plugins/OStatus/actions/ostatusinit.php b/plugins/OStatus/actions/ostatusinit.php
index 4afde2c36e..abd8cb5419 100644
--- a/plugins/OStatus/actions/ostatusinit.php
+++ b/plugins/OStatus/actions/ostatusinit.php
@@ -119,7 +119,7 @@ class OStatusInitAction extends Action
             } else {
                 $this->connectProfile($this->acct);
             }
-        } elseif (strpos('@', $this->acct) !== false) {
+        } elseif (strpos($this->acct, '@') !== false) {
             $this->connectWebfinger($this->acct);
         }
     }
@@ -139,7 +139,7 @@ class OStatusInitAction extends Action
                 $user = User::staticGet('nickname', $this->nickname);
                 $target_profile = common_local_url('userbyid', array('id' => $user->id));
 
-                $url = $w->applyTemplate($link['template'], $feed_url);
+                $url = $w->applyTemplate($link['template'], $target_profile);
 
                 common_redirect($url, 303);
             }

From effa4f5d1efffcb52d4a95562e0b4831f7bd3435 Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Mon, 22 Feb 2010 01:39:00 -0500
Subject: [PATCH 32/97] adding extlib for Crypt_RSA

---
 plugins/OStatus/OStatusPlugin.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 60bb144a83..24ed23a002 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -24,6 +24,8 @@
 
 if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
 
+set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__FILE__) . '/extlib/');
+
 class FeedSubException extends Exception
 {
 }

From 47300a2ae9a51108fbf59a57cf5ab6e8867b54a6 Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@status.net>
Date: Mon, 22 Feb 2010 01:21:34 -0800
Subject: [PATCH 33/97] Upgrade profile-based activity noun to have more
 complete set of profile fields

---
 classes/Profile.php        | 45 ++++++++++++++++++++++++++++++++++++--
 lib/atom10feed.php         |  4 ++--
 lib/atomusernoticefeed.php |  3 +--
 3 files changed, 46 insertions(+), 6 deletions(-)

diff --git a/classes/Profile.php b/classes/Profile.php
index 6b396c8c34..4f67fc0bcc 100644
--- a/classes/Profile.php
+++ b/classes/Profile.php
@@ -792,9 +792,11 @@ class Profile extends Memcached_DataObject
      * Returns an XML string fragment with profile information as an
      * Activity Streams noun object with the given element type.
      *
-     * Assumes that 'activity' namespace has been previously defined.
+     * Assumes that 'activity', 'georss', and 'poco' namespace has been
+     * previously defined.
      *
      * @param string $element one of 'actor', 'subject', 'object', 'target'
+     *
      * @return string
      */
     function asActivityNoun($element)
@@ -811,9 +813,46 @@ class Profile extends Memcached_DataObject
             'id',
             null,
             $this->getUri()
-            );
+        );
+
+        // title should contain fullname
         $xs->element('title', null, $this->getBestName());
 
+        // Portable Contacts stuff
+
+        if (isset($this->bio)) {
+
+            // XXX: Possible to use OpenSocial's aboutMe?
+
+            $xs->element('poco:note', null, $this->bio);
+        }
+
+        if (isset($this->homepage)) {
+
+            $xs->elementStart('poco:urls');
+            $xs->element('poco:value', null, $this->homepage);
+            $xs->element('poco:type', null, 'homepage');
+            $xs->element('poco:primary', null, 'true');
+            $xs->elementEnd('poco:urls');
+        }
+
+        if (isset($this->location)) {
+            $xs->elementStart('poco:address');
+            $xs->element('poco:formatted', null, $this->location);
+            $xs->elementEnd('poco:address');
+        }
+
+        if (isset($this->lat) && isset($this->lon)) {
+            $this->element(
+                'georss:point',
+                null,
+                (float)$this->lat . ' ' . (float)$this->lon
+            );
+        }
+
+        // XXX: Should we send all avatar sizes we have?  I think
+        // cliqset does -Z
+
         $avatar = $this->getAvatar(AVATAR_PROFILE_SIZE);
 
         $xs->element(
@@ -829,6 +868,8 @@ class Profile extends Memcached_DataObject
 
         $xs->elementEnd('activity:' . $element);
 
+        // XXX: Add people tags with <poco:tags> plural?
+
         return $xs->getString();
     }
 
diff --git a/lib/atom10feed.php b/lib/atom10feed.php
index 5e17b20d3a..8842840d56 100644
--- a/lib/atom10feed.php
+++ b/lib/atom10feed.php
@@ -109,11 +109,11 @@ class Atom10Feed extends XMLStringer
             );
         }
 
-        if (!is_null($uri)) {
+        if (isset($uri)) {
             $xs->element('uri', null, $uri);
         }
 
-        if (!is_null(email)) {
+        if (isset($email)) {
             $xs->element('email', null, $email);
         }
 
diff --git a/lib/atomusernoticefeed.php b/lib/atomusernoticefeed.php
index f71c721fec..2ad8de4550 100644
--- a/lib/atomusernoticefeed.php
+++ b/lib/atomusernoticefeed.php
@@ -60,8 +60,7 @@ class AtomUserNoticeFeed extends AtomNoticeFeed
         $this->user = $user;
         if (!empty($user)) {
             $profile = $user->getProfile();
-            $this->addAuthor($profile->getBestName(),
-                             $user->uri);
+            $this->addAuthor($profile->nickname, $user->uri);
         }
     }
 

From f54c9b70dbabb70de93fcdd896297adfff5494f4 Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Mon, 22 Feb 2010 11:53:34 +0100
Subject: [PATCH 34/97] Fixed error/warning message location in OStatus
 autorize subscription page

---
 plugins/OStatus/actions/ostatussub.php | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/plugins/OStatus/actions/ostatussub.php b/plugins/OStatus/actions/ostatussub.php
index bbbd1b7e69..8cb8e2ae7c 100644
--- a/plugins/OStatus/actions/ostatussub.php
+++ b/plugins/OStatus/actions/ostatussub.php
@@ -58,6 +58,13 @@ class OStatusSubAction extends Action
         $this->showPage();
     }
 
+    function showPageNotice()
+    {
+        if ($this->error) {
+            $this->element('p', 'error', $this->error);
+        }
+    }
+
     /**
      * Content area of the page
      *
@@ -69,11 +76,6 @@ class OStatusSubAction extends Action
 
     function showContent()
     {
-        // @fixme is this right place?
-        if ($this->error) {
-            $this->text($this->error);
-        }
-
         $user = common_current_user();
 
         $profile = $user->getProfile();
@@ -255,7 +257,7 @@ class OStatusSubAction extends Action
     {
         if ($this->validateFeed()) {
             $this->preview = true;
-            $this->showForm(_m('Previewing feed:'));
+            $this->showForm();
         }
     }
 

From e94800ced9884f20df73cd6325d0fefb33ac2236 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Mon, 22 Feb 2010 07:08:57 -0500
Subject: [PATCH 35/97] fix broken link in OpenID documentation

---
 plugins/OpenID/doc-src/openid | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/OpenID/doc-src/openid b/plugins/OpenID/doc-src/openid
index c741e36741..f2dc610a55 100644
--- a/plugins/OpenID/doc-src/openid
+++ b/plugins/OpenID/doc-src/openid
@@ -3,7 +3,7 @@
 If you already have an account on %%site.name%%, you can [login](%%action.login%%) with your username and password as usual.
 To use OpenID in the future, you can [add an OpenID to your account](%%action.openidsettings%%) after you have logged in normally.
 
-There are many [Public OpenID providers](http://wiki.openid.net/Public_OpenID_providers), and you may already have an OpenID-enabled account on another service.
+There are many [Public OpenID providers](http://wiki.openid.net/OpenID-Providers), and you may already have an OpenID-enabled account on another service.
 
 * On wikis: If you have an account on an OpenID-enabled wiki, like [Wikitravel](http://wikitravel.org/), [wikiHow](http://www.wikihow.com/), [Vinismo](http://vinismo.com/), [AboutUs](http://aboutus.org/) or [Keiki](http://kei.ki/), you can log in to %%site.name%% by entering the **full URL** of your user page on that other wiki in the box above. For example, *http://kei.ki/en/User:Evan*.
 * [Yahoo!](http://openid.yahoo.com/) : If you have an account with Yahoo!, you can log in to this site by entering your Yahoo!-provided OpenID in the box above. Yahoo! OpenID URLs have the form *https://me.yahoo.com/yourusername*.

From fae5a15a885b0c108efc4c5e28094f15ffbe8694 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Mon, 22 Feb 2010 07:40:20 -0500
Subject: [PATCH 36/97] add strongly-suggested link to
 Profile::asActivityNoun()

---
 classes/Profile.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/classes/Profile.php b/classes/Profile.php
index 1ba3281ff6..faa6367b9c 100644
--- a/classes/Profile.php
+++ b/classes/Profile.php
@@ -818,6 +818,10 @@ class Profile extends Memcached_DataObject
         // title should contain fullname
         $xs->element('title', null, $this->getBestName());
 
+        $xs->element('link', array('rel' => 'alternate',
+                                   'type' => 'text/html'),
+                     $this->profileurl);
+
         // Portable Contacts stuff
 
         if (isset($this->bio)) {

From b79d4ed6a1e61c600fdd382f3bdfde62aaa15b3d Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Mon, 22 Feb 2010 07:43:12 -0500
Subject: [PATCH 37/97] add PoCo preferredUsername for nickname in
 Profile::asActivityNoun()

---
 classes/Profile.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/classes/Profile.php b/classes/Profile.php
index faa6367b9c..7fb2b87bc3 100644
--- a/classes/Profile.php
+++ b/classes/Profile.php
@@ -822,6 +822,8 @@ class Profile extends Memcached_DataObject
                                    'type' => 'text/html'),
                      $this->profileurl);
 
+        $xs->element('poco:preferredUsername', null, $this->nickname);
+
         // Portable Contacts stuff
 
         if (isset($this->bio)) {

From 75fdef209245bf9424d4b995a42e4dfd980469d2 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Mon, 22 Feb 2010 07:57:44 -0500
Subject: [PATCH 38/97] handle poco nicknames in Ostatus_profile

---
 plugins/OStatus/classes/Ostatus_profile.php | 4 +++-
 plugins/OStatus/lib/activity.php            | 9 ++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 71885bcdce..0e12f8fc6e 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -832,7 +832,9 @@ class Ostatus_profile extends Memcached_DataObject
 
     protected static function getActivityObjectNickname($object, $hints=array())
     {
-        // XXX: check whatever PoCo calls a nickname first
+        if (!empty($object->nickname)) {
+            return common_nicknamize($object->nickname);
+        }
 
         // Try the definitive ID
 
diff --git a/plugins/OStatus/lib/activity.php b/plugins/OStatus/lib/activity.php
index af83f8bc66..a26248f199 100644
--- a/plugins/OStatus/lib/activity.php
+++ b/plugins/OStatus/lib/activity.php
@@ -31,6 +31,12 @@ if (!defined('STATUSNET')) {
     exit(1);
 }
 
+class PoCo
+{
+    const NS = 'http://portablecontacts.net/spec/1.0';
+    const USERNAME = 'preferredUsername';
+}
+
 /**
  * Utilities for turning DOMish things into Activityish things
  *
@@ -319,7 +325,8 @@ class ActivityObject
             $this->displayName = $this->title;
 
             // @fixme we may have multiple avatars with different resolutions specified
-            $this->avatar = ActivityUtils::getLink($element, 'avatar');
+            $this->avatar   = ActivityUtils::getLink($element, 'avatar');
+            $this->nickname = ActivityUtils::childContent($element, PoCo::USERNAME, PoCo::NS);
         }
     }
 

From e0388cc1d3922002596c2ec0531ac2f06d91806a Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Mon, 22 Feb 2010 09:05:32 -0500
Subject: [PATCH 39/97] adding magic sig stuff

---
 plugins/OStatus/extlib/Crypt/RSA.php          | 524 ++++++++++++
 .../OStatus/extlib/Crypt/RSA/ErrorHandler.php | 234 +++++
 plugins/OStatus/extlib/Crypt/RSA/Key.php      | 315 +++++++
 plugins/OStatus/extlib/Crypt/RSA/KeyPair.php  | 804 ++++++++++++++++++
 .../OStatus/extlib/Crypt/RSA/Math/BCMath.php  | 482 +++++++++++
 .../OStatus/extlib/Crypt/RSA/Math/BigInt.php  | 313 +++++++
 plugins/OStatus/extlib/Crypt/RSA/Math/GMP.php | 361 ++++++++
 .../OStatus/extlib/Crypt/RSA/MathLoader.php   | 135 +++
 plugins/OStatus/lib/magicenvelope.php         | 174 ++++
 plugins/OStatus/lib/magicsig.php              | 159 ++++
 10 files changed, 3501 insertions(+)
 create mode 100644 plugins/OStatus/extlib/Crypt/RSA.php
 create mode 100644 plugins/OStatus/extlib/Crypt/RSA/ErrorHandler.php
 create mode 100644 plugins/OStatus/extlib/Crypt/RSA/Key.php
 create mode 100644 plugins/OStatus/extlib/Crypt/RSA/KeyPair.php
 create mode 100644 plugins/OStatus/extlib/Crypt/RSA/Math/BCMath.php
 create mode 100644 plugins/OStatus/extlib/Crypt/RSA/Math/BigInt.php
 create mode 100644 plugins/OStatus/extlib/Crypt/RSA/Math/GMP.php
 create mode 100644 plugins/OStatus/extlib/Crypt/RSA/MathLoader.php
 create mode 100644 plugins/OStatus/lib/magicenvelope.php
 create mode 100644 plugins/OStatus/lib/magicsig.php

diff --git a/plugins/OStatus/extlib/Crypt/RSA.php b/plugins/OStatus/extlib/Crypt/RSA.php
new file mode 100644
index 0000000000..16dfa54d48
--- /dev/null
+++ b/plugins/OStatus/extlib/Crypt/RSA.php
@@ -0,0 +1,524 @@
+<?php
+/**
+ * Crypt_RSA allows to do following operations:
+ *     - key pair generation
+ *     - encryption and decryption
+ *     - signing and sign validation
+ *
+ * PHP versions 4 and 5
+ *
+ * LICENSE: This source file is subject to version 3.0 of the PHP license
+ * that is available through the world-wide-web at the following URI:
+ * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
+ * the PHP License and are unable to obtain it through the web, please
+ * send a note to license@php.net so we can mail you a copy immediately.
+ *
+ * @category   Encryption
+ * @package    Crypt_RSA
+ * @author     Alexander Valyalkin <valyala@gmail.com>
+ * @copyright  2005, 2006 Alexander Valyalkin
+ * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @version    1.2.0b
+ * @link       http://pear.php.net/package/Crypt_RSA
+ */
+
+/**
+ * RSA error handling facilities
+ */
+require_once 'Crypt/RSA/ErrorHandler.php';
+
+/**
+ * loader for math wrappers
+ */
+require_once 'Crypt/RSA/MathLoader.php';
+
+/**
+ * helper class for mange single key
+ */
+require_once 'Crypt/RSA/Key.php';
+
+/**
+ * helper class for manage key pair
+ */
+require_once 'Crypt/RSA/KeyPair.php';
+
+/**
+ * Crypt_RSA class, derived from Crypt_RSA_ErrorHandler
+ *
+ * Provides the following functions:
+ *  - setParams($params) - sets parameters of current object
+ *  - encrypt($plain_data, $key = null) - encrypts data
+ *  - decrypt($enc_data, $key = null) - decrypts data
+ *  - createSign($doc, $private_key = null) - signs document by private key
+ *  - validateSign($doc, $signature, $public_key = null) - validates signature of document
+ *
+ * Example usage:
+ *     // creating an error handler
+ *     $error_handler = create_function('$obj', 'echo "error: ", $obj->getMessage(), "\n"');
+ *
+ *     // 1024-bit key pair generation
+ *     $key_pair = new Crypt_RSA_KeyPair(1024);
+ *
+ *     // check consistence of Crypt_RSA_KeyPair object
+ *     $error_handler($key_pair);
+ *
+ *     // creating Crypt_RSA object
+ *     $rsa_obj = new Crypt_RSA;
+ *
+ *     // check consistence of Crypt_RSA object
+ *     $error_handler($rsa_obj);
+ *
+ *     // set error handler on Crypt_RSA object ( see Crypt/RSA/ErrorHandler.php for details )
+ *     $rsa_obj->setErrorHandler($error_handler);
+ *
+ *     // encryption (usually using public key)
+ *     $enc_data = $rsa_obj->encrypt($plain_data, $key_pair->getPublicKey());
+ *
+ *     // decryption (usually using private key)
+ *     $plain_data = $rsa_obj->decrypt($enc_data, $key_pair->getPrivateKey());
+ *
+ *     // signing
+ *     $signature = $rsa_obj->createSign($document, $key_pair->getPrivateKey());
+ *
+ *     // signature checking
+ *     $is_valid = $rsa_obj->validateSign($document, $signature, $key_pair->getPublicKey());
+ *
+ *     // signing many documents by one private key
+ *     $rsa_obj = new Crypt_RSA(array('private_key' => $key_pair->getPrivateKey()));
+ *     // check consistence of Crypt_RSA object
+ *     $error_handler($rsa_obj);
+ *     // set error handler ( see Crypt/RSA/ErrorHandler.php for details )
+ *     $rsa_obj->setErrorHandler($error_handler);
+ *     // sign many documents
+ *     $sign_1 = $rsa_obj->sign($doc_1);
+ *     $sign_2 = $rsa_obj->sign($doc_2);
+ *     //...
+ *     $sign_n = $rsa_obj->sign($doc_n);
+ *
+ *     // changing default hash function, which is used for sign
+ *     // creating/validation
+ *     $rsa_obj->setParams(array('hash_func' => 'md5'));
+ *
+ *     // using factory() method instead of constructor (it returns PEAR_Error object on failure)
+ *     $rsa_obj = &Crypt_RSA::factory();
+ *     if (PEAR::isError($rsa_obj)) {
+ *         echo "error: ", $rsa_obj->getMessage(), "\n";
+ *     }
+ *
+ * @category   Encryption
+ * @package    Crypt_RSA
+ * @author     Alexander Valyalkin <valyala@gmail.com>
+ * @copyright  2005, 2006 Alexander Valyalkin
+ * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @link       http://pear.php.net/package/Crypt_RSA
+ * @version    @package_version@
+ * @access     public
+ */
+class Crypt_RSA extends Crypt_RSA_ErrorHandler
+{
+    /**
+     * Reference to math wrapper, which is used to
+     * manipulate large integers in RSA algorithm.
+     *
+     * @var object of Crypt_RSA_Math_* class
+     * @access private
+     */
+    var $_math_obj;
+
+    /**
+     * key for encryption, which is used by encrypt() method
+     *
+     * @var object of Crypt_RSA_KEY class
+     * @access private
+     */
+    var $_enc_key;
+
+    /**
+     * key for decryption, which is used by decrypt() method
+     *
+     * @var object of Crypt_RSA_KEY class
+     * @access private
+     */
+    var $_dec_key;
+
+    /**
+     * public key, which is used by validateSign() method
+     *
+     * @var object of Crypt_RSA_KEY class
+     * @access private
+     */
+    var $_public_key;
+
+    /**
+     * private key, which is used by createSign() method
+     *
+     * @var object of Crypt_RSA_KEY class
+     * @access private
+     */
+    var $_private_key;
+
+    /**
+     * name of hash function, which is used by validateSign()
+     * and createSign() methods. Default hash function is SHA-1
+     *
+     * @var string
+     * @access private
+     */
+    var $_hash_func = 'sha1';
+
+    /**
+     * Crypt_RSA constructor.
+     *
+     * @param array $params
+     *        Optional associative array of parameters, such as:
+     *        enc_key, dec_key, private_key, public_key, hash_func.
+     *        See setParams() method for more detailed description of
+     *        these parameters.
+     * @param string $wrapper_name
+     *        Name of math wrapper, which will be used to
+     *        perform different operations with big integers.
+     *        See contents of Crypt/RSA/Math folder for examples of wrappers.
+     *        Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
+     * @param string $error_handler   name of error handler function
+     *
+     * @access public
+     */
+    function Crypt_RSA($params = null, $wrapper_name = 'default', $error_handler = '')
+    {
+        // set error handler
+        $this->setErrorHandler($error_handler);
+        // try to load math wrapper
+        $obj = &Crypt_RSA_MathLoader::loadWrapper($wrapper_name);
+        if ($this->isError($obj)) {
+            // error during loading of math wrapper
+            // Crypt_RSA object is partially constructed.
+            $this->pushError($obj);
+            return;
+        }
+        $this->_math_obj = &$obj;
+
+        if (!is_null($params)) {
+            if (!$this->setParams($params)) {
+                // error in Crypt_RSA::setParams() function
+                return;
+            }
+        }
+    }
+
+    /**
+     * Crypt_RSA factory.
+     *
+     * @param array $params
+     *        Optional associative array of parameters, such as:
+     *        enc_key, dec_key, private_key, public_key, hash_func.
+     *        See setParams() method for more detailed description of
+     *        these parameters.
+     * @param string $wrapper_name
+     *        Name of math wrapper, which will be used to
+     *        perform different operations with big integers.
+     *        See contents of Crypt/RSA/Math folder for examples of wrappers.
+     *        Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
+     * @param string $error_handler   name of error handler function
+     *
+     * @return object  new Crypt_RSA object on success or PEAR_Error object on failure
+     * @access public
+     */
+    function &factory($params = null, $wrapper_name = 'default', $error_handler = '')
+    {
+        $obj = &new Crypt_RSA($params, $wrapper_name, $error_handler);
+        if ($obj->isError()) {
+            // error during creating a new object. Retrurn PEAR_Error object
+            return $obj->getLastError();
+        }
+        // object created successfully. Return it
+        return $obj;
+    }
+
+    /**
+     * Accepts any combination of available parameters as associative array:
+     *     enc_key - encryption key for encrypt() method
+     *     dec_key - decryption key for decrypt() method
+     *     public_key - key for validateSign() method
+     *     private_key - key for createSign() method
+     *     hash_func - name of hash function, which will be used to create and validate sign
+     *
+     * @param array $params
+     *        associative array of permitted parameters (see above)
+     *
+     * @return bool   true on success or false on error
+     * @access public
+     */
+    function setParams($params)
+    {
+        if (!is_array($params)) {
+            $this->pushError('parameters must be passed to function as associative array', CRYPT_RSA_ERROR_WRONG_PARAMS);
+            return false;
+        }
+
+        if (isset($params['enc_key'])) {
+            if (Crypt_RSA_Key::isValid($params['enc_key'])) {
+                $this->_enc_key = $params['enc_key'];
+            }
+            else {
+                $this->pushError('wrong encryption key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
+                return false;
+            }
+        }
+        if (isset($params['dec_key'])) {
+            if (Crypt_RSA_Key::isValid($params['dec_key'])) {
+                $this->_dec_key = $params['dec_key'];
+            }
+            else {
+                $this->pushError('wrong decryption key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
+                return false;
+            }
+        }
+        if (isset($params['private_key'])) {
+            if (Crypt_RSA_Key::isValid($params['private_key'])) {
+                if ($params['private_key']->getKeyType() != 'private') {
+                    $this->pushError('private key must have "private" attribute', CRYPT_RSA_ERROR_WRONG_KEY_TYPE);
+                    return false;
+                }
+                $this->_private_key = $params['private_key'];
+            }
+            else {
+                $this->pushError('wrong private key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
+                return false;
+            }
+        }
+        if (isset($params['public_key'])) {
+            if (Crypt_RSA_Key::isValid($params['public_key'])) {
+                if ($params['public_key']->getKeyType() != 'public') {
+                    $this->pushError('public key must have "public" attribute', CRYPT_RSA_ERROR_WRONG_KEY_TYPE);
+                    return false;
+                }
+                $this->_public_key = $params['public_key'];
+            }
+            else {
+                $this->pushError('wrong public key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
+                return false;
+            }
+        }
+        if (isset($params['hash_func'])) {
+            if (!function_exists($params['hash_func'])) {
+                $this->pushError('cannot find hash function with name [' . $params['hash_func'] . ']', CRYPT_RSA_ERROR_WRONG_HASH_FUNC);
+                return false;
+            }
+            $this->_hash_func = $params['hash_func'];
+        }
+        return true; // all ok
+    }
+
+    /**
+     * Ecnrypts $plain_data by the key $this->_enc_key or $key.
+     *
+     * @param string $plain_data  data, which must be encrypted
+     * @param object $key         encryption key (object of Crypt_RSA_Key class)
+     * @return mixed
+     *         encrypted data as string on success or false on error
+     *
+     * @access public
+     */
+    function encrypt($plain_data, $key = null)
+    {
+        $enc_data = $this->encryptBinary($plain_data, $key);
+        if ($enc_data !== false) {
+            return base64_encode($enc_data);
+        }
+        // error during encripting data
+        return false;
+    }
+
+    /**
+     * Ecnrypts $plain_data by the key $this->_enc_key or $key.
+     *
+     * @param string $plain_data  data, which must be encrypted
+     * @param object $key         encryption key (object of Crypt_RSA_Key class)
+     * @return mixed
+     *         encrypted data as binary string on success or false on error
+     *
+     * @access public
+     */
+    function encryptBinary($plain_data, $key = null)
+    {
+        if (is_null($key)) {
+            // use current encryption key
+            $key = $this->_enc_key;
+        }
+        else if (!Crypt_RSA_Key::isValid($key)) {
+            $this->pushError('invalid encryption key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
+            return false;
+        }
+
+        // append tail \x01 to plain data. It needs for correctly decrypting of data
+        $plain_data .= "\x01";
+
+        $plain_data = $this->_math_obj->bin2int($plain_data);
+        $exp = $this->_math_obj->bin2int($key->getExponent());
+        $modulus = $this->_math_obj->bin2int($key->getModulus());
+
+        // divide plain data into chunks
+        $data_len = $this->_math_obj->bitLen($plain_data);
+        $chunk_len = $key->getKeyLength() - 1;
+        $block_len = (int) ceil($chunk_len / 8);
+        $curr_pos = 0;
+        $enc_data = '';
+        while ($curr_pos < $data_len) {
+            $tmp = $this->_math_obj->subint($plain_data, $curr_pos, $chunk_len);
+            $enc_data .= str_pad(
+                $this->_math_obj->int2bin($this->_math_obj->powmod($tmp, $exp, $modulus)),
+                $block_len,
+                "\0"
+            );
+            $curr_pos += $chunk_len;
+        }
+        return $enc_data;
+    }
+
+    /**
+     * Decrypts $enc_data by the key $this->_dec_key or $key.
+     *
+     * @param string $enc_data  encrypted data as string
+     * @param object $key       decryption key (object of RSA_Crypt_Key class)
+     * @return mixed
+     *         decrypted data as string on success or false on error
+     *
+     * @access public
+     */
+    function decrypt($enc_data, $key = null)
+    {
+        $enc_data = base64_decode($enc_data);
+        return $this->decryptBinary($enc_data, $key);
+    }
+
+    /**
+     * Decrypts $enc_data by the key $this->_dec_key or $key.
+     *
+     * @param string $enc_data  encrypted data as binary string
+     * @param object $key       decryption key (object of RSA_Crypt_Key class)
+     * @return mixed
+     *         decrypted data as string on success or false on error
+     *
+     * @access public
+     */
+    function decryptBinary($enc_data, $key = null)
+    {
+        if (is_null($key)) {
+            // use current decryption key
+            $key = $this->_dec_key;
+        }
+        else if (!Crypt_RSA_Key::isValid($key)) {
+            $this->pushError('invalid decryption key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
+            return false;
+        }
+
+        $exp = $this->_math_obj->bin2int($key->getExponent());
+        $modulus = $this->_math_obj->bin2int($key->getModulus());
+
+        $data_len = strlen($enc_data);
+        $chunk_len = $key->getKeyLength() - 1;
+        $block_len = (int) ceil($chunk_len / 8);
+        $curr_pos = 0;
+        $bit_pos = 0;
+        $plain_data = $this->_math_obj->bin2int("\0");
+        while ($curr_pos < $data_len) {
+            $tmp = $this->_math_obj->bin2int(substr($enc_data, $curr_pos, $block_len));
+            $tmp = $this->_math_obj->powmod($tmp, $exp, $modulus);
+            $plain_data = $this->_math_obj->bitOr($plain_data, $tmp, $bit_pos);
+            $bit_pos += $chunk_len;
+            $curr_pos += $block_len;
+        }
+        $result = $this->_math_obj->int2bin($plain_data);
+
+        // delete tail, containing of \x01
+        $tail = ord($result{strlen($result) - 1});
+        if ($tail != 1) {
+            $this->pushError("Error tail of decrypted text = {$tail}. Expected 1", CRYPT_RSA_ERROR_WRONG_TAIL);
+            return false;
+        }
+        return substr($result, 0, -1);
+    }
+
+    /**
+     * Creates sign for document $document, using $this->_private_key or $private_key
+     * as private key and $this->_hash_func or $hash_func as hash function.
+     *
+     * @param string $document     document, which must be signed
+     * @param object $private_key  private key (object of Crypt_RSA_Key type)
+     * @param string $hash_func    name of hash function, which will be used during signing
+     * @return mixed
+     *         signature of $document as string on success or false on error
+     *
+     * @access public
+     */
+    function createSign($document, $private_key = null, $hash_func = null)
+    {
+        // check private key
+        if (is_null($private_key)) {
+            $private_key = $this->_private_key;
+        }
+        else if (!Crypt_RSA_Key::isValid($private_key)) {
+            $this->pushError('invalid private key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
+            return false;
+        }
+        if ($private_key->getKeyType() != 'private') {
+            $this->pushError('signing key must be private', CRYPT_RSA_ERROR_NEED_PRV_KEY);
+            return false;
+        }
+
+        // check hash_func
+        if (is_null($hash_func)) {
+            $hash_func = $this->_hash_func;
+        }
+        if (!function_exists($hash_func)) {
+            $this->pushError("cannot find hash function with name [$hash_func]", CRYPT_RSA_ERROR_WRONG_HASH_FUNC);
+            return false;
+        }
+
+        return $this->encrypt($hash_func($document), $private_key);
+    }
+
+    /**
+     * Validates $signature for document $document with public key $this->_public_key
+     * or $public_key and hash function $this->_hash_func or $hash_func.
+     *
+     * @param string $document    document, signature of which must be validated
+     * @param string $signature   signature, which must be validated
+     * @param object $public_key  public key (object of Crypt_RSA_Key class)
+     * @param string $hash_func   hash function, which will be used during validating signature
+     * @return mixed
+     *         true, if signature of document is valid
+     *         false, if signature of document is invalid
+     *         null on error
+     *
+     * @access public
+     */
+    function validateSign($document, $signature, $public_key = null, $hash_func = null)
+    {
+        // check public key
+        if (is_null($public_key)) {
+            $public_key = $this->_public_key;
+        }
+        else if (!Crypt_RSA_Key::isValid($public_key)) {
+            $this->pushError('invalid public key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
+            return null;
+        }
+        if ($public_key->getKeyType() != 'public') {
+            $this->pushError('validating key must be public', CRYPT_RSA_ERROR_NEED_PUB_KEY);
+            return null;
+        }
+
+        // check hash_func
+        if (is_null($hash_func)) {
+            $hash_func = $this->_hash_func;
+        }
+        if (!function_exists($hash_func)) {
+            $this->pushError("cannot find hash function with name [$hash_func]", CRYPT_RSA_ERROR_WRONG_HASH_FUNC);
+            return null;
+        }
+
+        return $hash_func($document) == $this->decrypt($signature, $public_key);
+    }
+}
+
+?>
\ No newline at end of file
diff --git a/plugins/OStatus/extlib/Crypt/RSA/ErrorHandler.php b/plugins/OStatus/extlib/Crypt/RSA/ErrorHandler.php
new file mode 100644
index 0000000000..8f39741e02
--- /dev/null
+++ b/plugins/OStatus/extlib/Crypt/RSA/ErrorHandler.php
@@ -0,0 +1,234 @@
+<?php
+/**
+ * Crypt_RSA allows to do following operations:
+ *     - key pair generation
+ *     - encryption and decryption
+ *     - signing and sign validation
+ *
+ * PHP versions 4 and 5
+ *
+ * LICENSE: This source file is subject to version 3.0 of the PHP license
+ * that is available through the world-wide-web at the following URI:
+ * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
+ * the PHP License and are unable to obtain it through the web, please
+ * send a note to license@php.net so we can mail you a copy immediately.
+ *
+ * @category  Encryption
+ * @package   Crypt_RSA
+ * @author    Alexander Valyalkin <valyala@gmail.com>
+ * @copyright 2005 Alexander Valyalkin
+ * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @version   CVS: $Id: ErrorHandler.php,v 1.4 2009/01/05 08:30:29 clockwerx Exp $
+ * @link      http://pear.php.net/package/Crypt_RSA
+ */
+
+/**
+ * uses PEAR's error handling
+ */
+require_once 'PEAR.php';
+
+/**
+ * cannot load required extension for math wrapper
+ */
+define('CRYPT_RSA_ERROR_NO_EXT', 1);
+
+/**
+ * cannot load any math wrappers.
+ * Possible reasons:
+ *  - there is no any wrappers (they must exist in Crypt/RSA/Math folder )
+ *  - all available wrappers are incorrect (read docs/Crypt_RSA/docs/math_wrappers.txt )
+ *  - cannot load any extension, required by available wrappers
+ */
+define('CRYPT_RSA_ERROR_NO_WRAPPERS', 2);
+
+/**
+ * cannot find file, containing requested math wrapper
+ */
+define('CRYPT_RSA_ERROR_NO_FILE', 3);
+
+/**
+ * cannot find math wrapper class in the math wrapper file
+ */
+define('CRYPT_RSA_ERROR_NO_CLASS', 4);
+
+/**
+ * invalid key type passed to function (it must be 'public' or 'private')
+ */
+define('CRYPT_RSA_ERROR_WRONG_KEY_TYPE', 5);
+
+/**
+ * key modulus must be greater than key exponent
+ */
+define('CRYPT_RSA_ERROR_EXP_GE_MOD', 6);
+
+/**
+ * missing $key_len parameter in Crypt_RSA_KeyPair::generate($key_len) function
+ */
+define('CRYPT_RSA_ERROR_MISSING_KEY_LEN', 7);
+
+/**
+ * wrong key object passed to function (it must be an object of Crypt_RSA_Key class)
+ */
+define('CRYPT_RSA_ERROR_WRONG_KEY', 8);
+
+/**
+ * wrong name of hash function passed to Crypt_RSA::setParams() function
+ */
+define('CRYPT_RSA_ERROR_WRONG_HASH_FUNC', 9);
+
+/**
+ * key, used for signing, must be private
+ */
+define('CRYPT_RSA_ERROR_NEED_PRV_KEY', 10);
+
+/**
+ * key, used for sign validating, must be public
+ */
+define('CRYPT_RSA_ERROR_NEED_PUB_KEY', 11);
+
+/**
+ * parameters must be passed to function as associative array
+ */
+define('CRYPT_RSA_ERROR_WRONG_PARAMS', 12);
+
+/**
+ * error tail of decrypted text. Maybe, wrong decryption key?
+ */
+define('CRYPT_RSA_ERROR_WRONG_TAIL', 13);
+
+/**
+ * Crypt_RSA_ErrorHandler class.
+ *
+ * This class is used as base for Crypt_RSA, Crypt_RSA_Key
+ * and Crypt_RSA_KeyPair classes.
+ *
+ * It provides following functions:
+ *   - isError() - returns true, if list contains errors, else returns false
+ *   - getErrorList() - returns error list
+ *   - getLastError() - returns last error from error list or false, if list is empty
+ *   - pushError($errstr) - pushes $errstr into the error list
+ *   - setErrorHandler($new_error_handler) - sets error handler function
+ *   - getErrorHandler() - returns name of error handler function
+ *
+ * @category  Encryption
+ * @package   Crypt_RSA
+ * @author    Alexander Valyalkin <valyala@gmail.com>
+ * @copyright 2005 Alexander Valyalkin
+ * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @version   Release: @package_version@
+ * @link      http://pear.php.net/package/Crypt_RSA
+ * @access    public
+ */
+class Crypt_RSA_ErrorHandler
+{
+    /**
+     * array of error objects, pushed by $this->pushError()
+     *
+     * @var array
+     * @access private
+     */
+    var $_errors = array();
+
+    /**
+     * name of error handler - function, which calls on $this->pushError() call
+     *
+     * @var string
+     * @access private
+     */
+    var $_error_handler = '';
+
+    /**
+     * Returns true if list of errors is not empty, else returns false
+     *
+     * @param mixed $err Check if the object is an error
+     *
+     * @return bool    true, if list of errors is not empty or $err is PEAR_Error object, else false
+     * @access public
+     */
+    function isError($err = null)
+    {
+        return is_null($err) ? (sizeof($this->_errors) > 0) : PEAR::isError($err);
+    }
+
+    /**
+     * Returns list of all errors, pushed to error list by $this->pushError()
+     *
+     * @return array    list of errors (usually it contains objects of PEAR_Error class)
+     * @access public
+     */
+    function getErrorList()
+    {
+        return $this->_errors;
+    }
+
+    /**
+     * Returns last error from errors list or false, if list is empty
+     *
+     * @return mixed
+     *         last error from errors list (usually it is PEAR_Error object)
+     *         or false, if list is empty.
+     *
+     * @access public
+     */
+    function getLastError()
+    {
+        $len = sizeof($this->_errors);
+        return $len ? $this->_errors[$len - 1] : false;
+    }
+
+    /**
+     * pushes error object $error to the error list
+     *
+     * @param string $errstr error string
+     * @param int    $errno  error number
+     *
+     * @return bool          true on success, false on error
+     * @access public
+     */
+    function pushError($errstr, $errno = 0)
+    {
+        $this->_errors[] = PEAR::raiseError($errstr, $errno);
+
+        if ($this->_error_handler != '') {
+            // call user defined error handler
+            $func = $this->_error_handler;
+            $func($this);
+        }
+        return true;
+    }
+
+    /**
+     * sets error handler to function with name $func_name.
+     * Function $func_name must accept one parameter - current
+     * object, which triggered error.
+     *
+     * @param string $func_name name of error handler function
+     *
+     * @return bool             true on success, false on error
+     * @access public
+     */
+    function setErrorHandler($func_name = '')
+    {
+        if ($func_name == '') {
+            $this->_error_handler = '';
+        }
+        if (!function_exists($func_name)) {
+            return false;
+        }
+        $this->_error_handler = $func_name;
+        return true;
+    }
+
+    /**
+     * returns name of current error handler, or null if there is no error handler
+     *
+     * @return mixed  error handler name as string or null, if there is no error handler
+     * @access public
+     */
+    function getErrorHandler()
+    {
+        return $this->_error_handler;
+    }
+}
+
+?>
diff --git a/plugins/OStatus/extlib/Crypt/RSA/Key.php b/plugins/OStatus/extlib/Crypt/RSA/Key.php
new file mode 100644
index 0000000000..6595302291
--- /dev/null
+++ b/plugins/OStatus/extlib/Crypt/RSA/Key.php
@@ -0,0 +1,315 @@
+<?php
+/**
+ * Crypt_RSA allows to do following operations:
+ *     - key pair generation
+ *     - encryption and decryption
+ *     - signing and sign validation
+ *
+ * PHP versions 4 and 5
+ *
+ * LICENSE: This source file is subject to version 3.0 of the PHP license
+ * that is available through the world-wide-web at the following URI:
+ * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
+ * the PHP License and are unable to obtain it through the web, please
+ * send a note to license@php.net so we can mail you a copy immediately.
+ *
+ * @category  Encryption
+ * @package   Crypt_RSA
+ * @author    Alexander Valyalkin <valyala@gmail.com>
+ * @copyright 2005 Alexander Valyalkin
+ * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @version   CVS: $Id: Key.php,v 1.6 2009/01/05 08:30:29 clockwerx Exp $
+ * @link      http://pear.php.net/package/Crypt_RSA
+ */
+
+/**
+ * RSA error handling facilities
+ */
+require_once 'Crypt/RSA/ErrorHandler.php';
+
+/**
+ * loader for RSA math wrappers
+ */
+require_once 'Crypt/RSA/MathLoader.php';
+
+/**
+ * Crypt_RSA_Key class, derived from Crypt_RSA_ErrorHandler
+ *
+ * Provides the following functions:
+ *  - getKeyLength() - returns bit key length
+ *  - getExponent() - returns key exponent as binary string
+ *  - getModulus() - returns key modulus as binary string
+ *  - getKeyType() - returns type of the key (public or private)
+ *  - toString() - returns serialized key as string
+ *  - fromString($key_str) - static function; returns key, unserialized from string
+ *  - isValid($key) - static function for validating of $key
+ *
+ * Example usage:
+ *    // create new 1024-bit key pair
+ *    $key_pair = new Crypt_RSA_KeyPair(1024);
+ * 
+ *    // get public key (its class is Crypt_RSA_Key)
+ *    $key = $key_pair->getPublicKey();
+ *
+ *    // get key length
+ *    $len = $key->getKeyLength();
+ *
+ *    // get modulus as string
+ *    $modulus = $key->getModulus();
+ *
+ *    // get exponent as string
+ *    $exponent = $key->getExponent();
+ *
+ *    // get string represenation of key (use it instead of serialization of Crypt_RSA_Key object)
+ *    $key_in_str = $key->toString();
+ *
+ *    // restore key object from string using 'BigInt' math wrapper
+ *    $key = Crypt_RSA_Key::fromString($key_in_str, 'BigInt');
+ *
+ *    // error check
+ *    if ($key->isError()) {
+ *        echo "error while unserializing key object:\n";
+ *        $erorr = $key->getLastError();
+ *        echo $error->getMessage(), "\n";
+ *    }
+ *
+ *    // validate key
+ *    if (Crypt_RSA_Key::isValid($key)) echo 'valid key';
+ *    else echo 'invalid key';
+ *
+ *    // using factory() method instead of constructor (it returns PEAR_Error object on failure)
+ *    $rsa_obj = &Crypt_RSA_Key::factory($modulus, $exp, $key_type);
+ *    if (PEAR::isError($rsa_obj)) {
+ *        echo "error: ", $rsa_obj->getMessage(), "\n";
+ *    }
+ *
+ * @category  Encryption
+ * @package   Crypt_RSA
+ * @author    Alexander Valyalkin <valyala@gmail.com>
+ * @copyright 2005 Alexander Valyalkin
+ * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @version   Release: @package_version@
+ * @link      http://pear.php.net/package/Crypt_RSA
+ * @access    public
+ */
+class Crypt_RSA_Key extends Crypt_RSA_ErrorHandler
+{
+    /**
+     * Reference to math wrapper object, which is used to
+     * manipulate large integers in RSA algorithm.
+     *
+     * @var object of Crypt_RSA_Math_* class
+     * @access private
+     */
+    var $_math_obj;
+
+    /**
+     * shared modulus
+     *
+     * @var string
+     * @access private
+     */
+    var $_modulus;
+
+    /**
+     * exponent
+     *
+     * @var string
+     * @access private
+     */
+    var $_exp;
+
+    /**
+     * key type (private or public)
+     *
+     * @var string
+     * @access private
+     */
+    var $_key_type;
+
+    /**
+     * key length in bits
+     *
+     * @var int
+     * @access private
+     */
+    var $_key_len;
+
+    /**
+     * Crypt_RSA_Key constructor.
+     *
+     * You should pass in the name of math wrapper, which will be used to
+     *        perform different operations with big integers.
+     *        See contents of Crypt/RSA/Math folder for examples of wrappers.
+     *        Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
+     *
+     * @param string $modulus       key modulus
+     * @param string $exp           key exponent
+     * @param string $key_type      type of the key (public or private)
+     * @param string $wrapper_name  wrapper to use
+     * @param string $error_handler name of error handler function
+     *
+     * @access public
+     */
+    function Crypt_RSA_Key($modulus, $exp, $key_type, $wrapper_name = 'default', $error_handler = '')
+    {
+        // set error handler
+        $this->setErrorHandler($error_handler);
+        // try to load math wrapper $wrapper_name
+        $obj = &Crypt_RSA_MathLoader::loadWrapper($wrapper_name);
+        if ($this->isError($obj)) {
+            // error during loading of math wrapper
+            $this->pushError($obj); // push error object into error list
+            return;
+        }
+        $this->_math_obj = &$obj;
+
+        $this->_modulus = $modulus;
+        $this->_exp = $exp;
+
+        if (!in_array($key_type, array('private', 'public'))) {
+            $this->pushError('invalid key type. It must be private or public', CRYPT_RSA_ERROR_WRONG_KEY_TYPE);
+            return;
+        }
+        $this->_key_type = $key_type;
+
+        /* check length of modulus & exponent ( abs(modulus) > abs(exp) ) */
+        $mod_num = $this->_math_obj->bin2int($this->_modulus);
+        $exp_num = $this->_math_obj->bin2int($this->_exp);
+
+        if ($this->_math_obj->cmpAbs($mod_num, $exp_num) <= 0) {
+            $this->pushError('modulus must be greater than exponent', CRYPT_RSA_ERROR_EXP_GE_MOD);
+            return;
+        }
+
+        // determine key length
+        $this->_key_len = $this->_math_obj->bitLen($mod_num);
+    }
+
+    /**
+     * Crypt_RSA_Key factory.
+     *
+     * @param string $modulus       key modulus
+     * @param string $exp           key exponent
+     * @param string $key_type      type of the key (public or private)
+     * @param string $wrapper_name  wrapper to use
+     * @param string $error_handler name of error handler function
+     *
+     * @return object   new Crypt_RSA_Key object on success or PEAR_Error object on failure
+     * @access public
+     */
+    function factory($modulus, $exp, $key_type, $wrapper_name = 'default', $error_handler = '')
+    {
+        $obj = new Crypt_RSA_Key($modulus, $exp, $key_type, $wrapper_name, $error_handler);
+        if ($obj->isError()) {
+            // error during creating a new object. Retrurn PEAR_Error object
+            return $obj->getLastError();
+        }
+        // object created successfully. Return it
+        return $obj;
+    }
+
+    /**
+     * Calculates bit length of the key
+     *
+     * @return int    bit length of key
+     * @access public
+     */
+    function getKeyLength()
+    {
+        return $this->_key_len;
+    }
+
+    /**
+     * Returns modulus part of the key as binary string,
+     * which can be used to construct new Crypt_RSA_Key object.
+     *
+     * @return string  modulus as binary string
+     * @access public
+     */
+    function getModulus()
+    {
+        return $this->_modulus;
+    }
+
+    /**
+     * Returns exponent part of the key as binary string,
+     * which can be used to construct new Crypt_RSA_Key object.
+     *
+     * @return string  exponent as binary string
+     * @access public
+     */
+    function getExponent()
+    {
+        return $this->_exp;
+    }
+
+    /**
+     * Returns key type (public, private)
+     *
+     * @return string  key type (public, private)
+     * @access public
+     */
+    function getKeyType()
+    {
+        return $this->_key_type;
+    }
+
+    /**
+     * Returns string representation of key
+     *
+     * @return string  key, serialized to string
+     * @access public
+     */
+    function toString()
+    {
+        return base64_encode(
+            serialize(
+                array($this->_modulus, $this->_exp, $this->_key_type)
+            )
+        );
+    }
+
+    /**
+     * Returns Crypt_RSA_Key object, unserialized from
+     * string representation of key.
+     *
+     * optional parameter $wrapper_name - is the name of math wrapper,
+     * which will be used during unserialization of this object.
+     *
+     * This function can be called statically:
+     *     $key = Crypt_RSA_Key::fromString($key_in_string, 'BigInt');
+     *
+     * @param string $key_str      RSA key, serialized into string
+     * @param string $wrapper_name optional math wrapper name
+     *
+     * @return object        key as Crypt_RSA_Key object
+     * @access public
+     * @static
+     */
+    function fromString($key_str, $wrapper_name = 'default')
+    {
+        list($modulus, $exponent, $key_type) = unserialize(base64_decode($key_str));
+        $obj = new Crypt_RSA_Key($modulus, $exponent, $key_type, $wrapper_name);
+        return $obj;
+    }
+
+    /**
+     * Validates key
+     * This function can be called statically:
+     *    $is_valid = Crypt_RSA_Key::isValid($key)
+     *
+     * Returns true, if $key is valid Crypt_RSA key, else returns false
+     *
+     * @param object $key Crypt_RSA_Key object for validating
+     *
+     * @return bool        true if $key is valid, else false
+     * @access public
+     */
+    function isValid($key)
+    {
+        return (is_object($key) && strtolower(get_class($key)) === strtolower(__CLASS__));
+    }
+}
+
+?>
diff --git a/plugins/OStatus/extlib/Crypt/RSA/KeyPair.php b/plugins/OStatus/extlib/Crypt/RSA/KeyPair.php
new file mode 100644
index 0000000000..ecc0b7dc7e
--- /dev/null
+++ b/plugins/OStatus/extlib/Crypt/RSA/KeyPair.php
@@ -0,0 +1,804 @@
+<?php
+/**
+ * Crypt_RSA allows to do following operations:
+ *     - key pair generation
+ *     - encryption and decryption
+ *     - signing and sign validation
+ *
+ * PHP versions 4 and 5
+ *
+ * LICENSE: This source file is subject to version 3.0 of the PHP license
+ * that is available through the world-wide-web at the following URI:
+ * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
+ * the PHP License and are unable to obtain it through the web, please
+ * send a note to license@php.net so we can mail you a copy immediately.
+ *
+ * @category  Encryption
+ * @package   Crypt_RSA
+ * @author    Alexander Valyalkin <valyala@gmail.com>
+ * @copyright 2005 Alexander Valyalkin
+ * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @version   CVS: $Id: KeyPair.php,v 1.7 2009/01/05 08:30:29 clockwerx Exp $
+ * @link      http://pear.php.net/package/Crypt_RSA
+ */
+
+/**
+ * RSA error handling facilities
+ */
+require_once 'Crypt/RSA/ErrorHandler.php';
+
+/**
+ * loader for RSA math wrappers
+ */
+require_once 'Crypt/RSA/MathLoader.php';
+
+/**
+ * helper class for single key managing
+ */
+require_once 'Crypt/RSA/Key.php';
+
+/**
+ * Crypt_RSA_KeyPair class, derived from Crypt_RSA_ErrorHandler
+ *
+ * Provides the following functions:
+ *  - generate($key) - generates new key pair
+ *  - getPublicKey() - returns public key
+ *  - getPrivateKey() - returns private key
+ *  - getKeyLength() - returns bit key length
+ *  - setRandomGenerator($func_name) - sets random generator to $func_name
+ *  - fromPEMString($str) - retrieves keypair from PEM-encoded string
+ *  - toPEMString() - stores keypair to PEM-encoded string
+ *  - isEqual($keypair2) - compares current keypair to $keypair2
+ *
+ * Example usage:
+ *    // create new 1024-bit key pair
+ *    $key_pair = new Crypt_RSA_KeyPair(1024);
+ *
+ *    // error check
+ *    if ($key_pair->isError()) {
+ *        echo "error while initializing Crypt_RSA_KeyPair object:\n";
+ *        $erorr = $key_pair->getLastError();
+ *        echo $error->getMessage(), "\n";
+ *    }
+ *
+ *    // get public key
+ *    $public_key = $key_pair->getPublicKey();
+ * 
+ *    // get private key
+ *    $private_key = $key_pair->getPrivateKey();
+ * 
+ *    // generate new 512-bit key pair
+ *    $key_pair->generate(512);
+ *
+ *    // error check
+ *    if ($key_pair->isError()) {
+ *        echo "error while generating key pair:\n";
+ *        $erorr = $key_pair->getLastError();
+ *        echo $error->getMessage(), "\n";
+ *    }
+ *
+ *    // get key pair length
+ *    $length = $key_pair->getKeyLength();
+ *
+ *    // set random generator to $func_name, where $func_name
+ *    // consists name of random generator function. See comments
+ *    // before setRandomGenerator() method for details
+ *    $key_pair->setRandomGenerator($func_name);
+ *
+ *    // error check
+ *    if ($key_pair->isError()) {
+ *        echo "error while changing random generator:\n";
+ *        $erorr = $key_pair->getLastError();
+ *        echo $error->getMessage(), "\n";
+ *    }
+ *
+ *    // using factory() method instead of constructor (it returns PEAR_Error object on failure)
+ *    $rsa_obj = &Crypt_RSA_KeyPair::factory($key_len);
+ *    if (PEAR::isError($rsa_obj)) {
+ *        echo "error: ", $rsa_obj->getMessage(), "\n";
+ *    }
+ *
+ *    // read key pair from PEM-encoded string:
+ *    $str = "-----BEGIN RSA PRIVATE KEY-----"
+ *         . "MCsCAQACBHr5LDkCAwEAAQIEBc6jbQIDAOCfAgMAjCcCAk3pAgJMawIDAL41"
+ *         . "-----END RSA PRIVATE KEY-----";
+ *    $keypair = Crypt_RSA_KeyPair::fromPEMString($str);
+ *
+ *    // read key pair from .pem file 'private.pem':
+ *    $str = file_get_contents('private.pem');
+ *    $keypair = Crypt_RSA_KeyPair::fromPEMString($str);
+ *
+ *    // generate and write 1024-bit key pair to .pem file 'private_new.pem'
+ *    $keypair = new Crypt_RSA_KeyPair(1024);
+ *    $str = $keypair->toPEMString();
+ *    file_put_contents('private_new.pem', $str);
+ *
+ *    // compare $keypair1 to $keypair2
+ *    if ($keypair1->isEqual($keypair2)) {
+ *        echo "keypair1 = keypair2\n";
+ *    }
+ *    else {
+ *        echo "keypair1 != keypair2\n";
+ *    }
+ *
+ * @category  Encryption
+ * @package   Crypt_RSA
+ * @author    Alexander Valyalkin <valyala@gmail.com>
+ * @copyright 2005 Alexander Valyalkin
+ * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @version   Release: @package_version@
+ * @link      http://pear.php.net/package/Crypt_RSA
+ * @access    public
+ */
+class Crypt_RSA_KeyPair extends Crypt_RSA_ErrorHandler
+{
+    /**
+     * Reference to math wrapper object, which is used to
+     * manipulate large integers in RSA algorithm.
+     *
+     * @var object of Crypt_RSA_Math_* class
+     * @access private
+     */
+    var $_math_obj;
+
+    /**
+     * length of each key in the key pair
+     *
+     * @var int
+     * @access private
+     */
+    var $_key_len;
+
+    /**
+     * public key
+     *
+     * @var object of Crypt_RSA_KEY class
+     * @access private
+     */
+    var $_public_key;
+
+    /**
+     * private key
+     *
+     * @var object of Crypt_RSA_KEY class
+     * @access private
+     */
+    var $_private_key;
+
+    /**
+     * name of function, which is used as random generator
+     *
+     * @var string
+     * @access private
+     */
+    var $_random_generator;
+
+    /**
+     * RSA keypair attributes [version, n, e, d, p, q, dmp1, dmq1, iqmp] as associative array
+     *
+     * @var array
+     * @access private
+     */
+    var $_attrs;
+
+    /**
+     * Returns names of keypair attributes from $this->_attrs array
+     *
+     * @return array  Array of keypair attributes names
+     * @access private
+     */
+    function _get_attr_names() 
+    {
+        return array('version', 'n', 'e', 'd', 'p', 'q', 'dmp1', 'dmq1', 'iqmp');
+    }
+
+    /**
+     * Parses ASN.1 string [$str] starting form position [$pos].
+     * Returns tag and string value of parsed object.
+     *
+     * @param string                 $str
+     * @param int                    &$pos
+     * @param Crypt_RSA_ErrorHandler &$err_handler
+     *
+     * @return mixed    Array('tag' => ..., 'str' => ...) on success, false on error
+     * @access private
+     */
+    function _ASN1Parse($str, &$pos, &$err_handler)
+    {
+        $max_pos = strlen($str);
+        if ($max_pos < 2) {
+            $err_handler->pushError("ASN.1 string too short");
+            return false;
+        }
+
+        // get ASN.1 tag value
+        $tag = ord($str[$pos++]) & 0x1f;
+        if ($tag == 0x1f) {
+            $tag = 0;
+            do {
+                $n = ord($str[$pos++]);
+                $tag <<= 7;
+                $tag |= $n & 0x7f;
+            } while (($n & 0x80) && $pos < $max_pos);
+        }
+        if ($pos >= $max_pos) {
+            $err_handler->pushError("ASN.1 string too short");
+            return false;
+        }
+
+        // get ASN.1 object length
+        $len = ord($str[$pos++]);
+        if ($len & 0x80) {
+            $n = $len & 0x1f;
+            $len = 0;
+            while ($n-- && $pos < $max_pos) {
+                $len <<= 8;
+                $len |= ord($str[$pos++]);
+            }
+        }
+        if ($pos >= $max_pos || $len > $max_pos - $pos) {
+            $err_handler->pushError("ASN.1 string too short");
+            return false;
+        }
+
+        // get string value of ASN.1 object
+        $str = substr($str, $pos, $len);
+
+        return array(
+            'tag' => $tag,
+            'str' => $str,
+        );
+    }
+
+    /**
+     * Parses ASN.1 sting [$str] starting from position [$pos].
+     * Returns string representation of number, which can be passed
+     * in bin2int() function of math wrapper.
+     *
+     * @param string                 $str
+     * @param int                    &$pos
+     * @param Crypt_RSA_ErrorHandler &$err_handler
+     *
+     * @return mixed   string representation of parsed number on success, false on error
+     * @access private
+     */
+    function _ASN1ParseInt($str, &$pos, &$err_handler)
+    {
+        $tmp = Crypt_RSA_KeyPair::_ASN1Parse($str, $pos, $err_handler);
+        if ($err_handler->isError()) {
+            return false;
+        }
+        if ($tmp['tag'] != 0x02) {
+            $errstr = sprintf("wrong ASN tag value: 0x%02x. Expected 0x02 (INTEGER)", $tmp['tag']);
+            $err_handler->pushError($errstr);
+            return false;
+        }
+        $pos += strlen($tmp['str']);
+
+        return strrev($tmp['str']);
+    }
+
+    /**
+     * Constructs ASN.1 string from tag $tag and object $str
+     *
+     * @param string $str            ASN.1 object string
+     * @param int    $tag            ASN.1 tag value
+     * @param bool   $is_constructed 
+     * @param bool   $is_private 
+     *
+     * @return ASN.1-encoded string
+     * @access private
+     */
+    function _ASN1Store($str, $tag, $is_constructed = false, $is_private = false)
+    {
+        $out = '';
+
+        // encode ASN.1 tag value
+        $tag_ext = ($is_constructed ? 0x20 : 0) | ($is_private ? 0xc0 : 0);
+        if ($tag < 0x1f) {
+            $out .= chr($tag | $tag_ext);
+        } else {
+            $out .= chr($tag_ext | 0x1f);
+            $tmp = chr($tag & 0x7f);
+            $tag >>= 7;
+            while ($tag) {
+                $tmp .= chr(($tag & 0x7f) | 0x80);
+                $tag >>= 7;
+            }
+            $out .= strrev($tmp);
+        }
+
+        // encode ASN.1 object length
+        $len = strlen($str);
+        if ($len < 0x7f) {
+            $out .= chr($len);
+        } else {
+            $tmp = '';
+            $n = 0;
+            while ($len) {
+                $tmp .= chr($len & 0xff);
+                $len >>= 8;
+                $n++;
+            }
+            $out .= chr($n | 0x80);
+            $out .= strrev($tmp);
+        }
+
+        return $out . $str;
+    }
+
+    /**
+     * Constructs ASN.1 string from binary representation of big integer
+     *
+     * @param string $str binary representation of big integer
+     *
+     * @return ASN.1-encoded string
+     * @access private
+     */
+    function _ASN1StoreInt($str)
+    {
+        $str = strrev($str);
+        return Crypt_RSA_KeyPair::_ASN1Store($str, 0x02);
+    }
+
+    /**
+     * Crypt_RSA_KeyPair constructor.
+     *
+     * Wrapper: name of math wrapper, which will be used to
+     *        perform different operations with big integers.
+     *        See contents of Crypt/RSA/Math folder for examples of wrappers.
+     *        Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
+     *
+     * @param int      $key_len          bit length of key pair, which will be generated in constructor
+     * @param string   $wrapper_name     wrapper name
+     * @param string   $error_handler    name of error handler function
+     * @param callback $random_generator function which will be used as random generator
+     *
+     * @access public
+     */
+    function Crypt_RSA_KeyPair($key_len, $wrapper_name = 'default', $error_handler = '', $random_generator = null)
+    {
+        // set error handler
+        $this->setErrorHandler($error_handler);
+        // try to load math wrapper
+        $obj = &Crypt_RSA_MathLoader::loadWrapper($wrapper_name);
+        if ($this->isError($obj)) {
+            // error during loading of math wrapper
+            $this->pushError($obj);
+            return;
+        }
+        $this->_math_obj = &$obj;
+
+        // set random generator
+        if (!$this->setRandomGenerator($random_generator)) {
+            // error in setRandomGenerator() function
+            return;
+        }
+
+        if (is_array($key_len)) {
+            // ugly BC hack - it is possible to pass RSA private key attributes [version, n, e, d, p, q, dmp1, dmq1, iqmp]
+            // as associative array instead of key length to Crypt_RSA_KeyPair constructor
+            $rsa_attrs = $key_len;
+
+            // convert attributes to big integers
+            $attr_names = $this->_get_attr_names();
+            foreach ($attr_names as $attr) {
+                if (!isset($rsa_attrs[$attr])) {
+                    $this->pushError("missing required RSA attribute [$attr]");
+                    return;
+                }
+                ${$attr} = $this->_math_obj->bin2int($rsa_attrs[$attr]);
+            }
+
+            // check primality of p and q
+            if (!$this->_math_obj->isPrime($p)) {
+                $this->pushError("[p] must be prime");
+                return;
+            }
+            if (!$this->_math_obj->isPrime($q)) {
+                $this->pushError("[q] must be prime");
+                return;
+            }
+
+            // check n = p * q
+            $n1 = $this->_math_obj->mul($p, $q);
+            if ($this->_math_obj->cmpAbs($n, $n1)) {
+                $this->pushError("n != p * q");
+                return;
+            }
+
+            // check e * d = 1 mod (p-1) * (q-1)
+            $p1 = $this->_math_obj->dec($p);
+            $q1 = $this->_math_obj->dec($q);
+            $p1q1 = $this->_math_obj->mul($p1, $q1);
+            $ed = $this->_math_obj->mul($e, $d);
+            $one = $this->_math_obj->mod($ed, $p1q1);
+            if (!$this->_math_obj->isOne($one)) {
+                $this->pushError("e * d != 1 mod (p-1)*(q-1)");
+                return;
+            }
+
+            // check dmp1 = d mod (p-1)
+            $dmp = $this->_math_obj->mod($d, $p1);
+            if ($this->_math_obj->cmpAbs($dmp, $dmp1)) {
+                $this->pushError("dmp1 != d mod (p-1)");
+                return;
+            }
+
+            // check dmq1 = d mod (q-1)
+            $dmq = $this->_math_obj->mod($d, $q1);
+            if ($this->_math_obj->cmpAbs($dmq, $dmq1)) {
+                $this->pushError("dmq1 != d mod (q-1)");
+                return;
+            }
+
+            // check iqmp = 1/q mod p
+            $q1 = $this->_math_obj->invmod($iqmp, $p);
+            if ($this->_math_obj->cmpAbs($q, $q1)) {
+                $this->pushError("iqmp != 1/q mod p");
+                return;
+            }
+
+            // try to create public key object
+            $public_key = &new Crypt_RSA_Key($rsa_attrs['n'], $rsa_attrs['e'], 'public', $wrapper_name, $error_handler);
+            if ($public_key->isError()) {
+                // error during creating public object
+                $this->pushError($public_key->getLastError());
+                return;
+            }
+
+            // try to create private key object
+            $private_key = &new Crypt_RSA_Key($rsa_attrs['n'], $rsa_attrs['d'], 'private', $wrapper_name, $error_handler);
+            if ($private_key->isError()) {
+                // error during creating private key object
+                $this->pushError($private_key->getLastError());
+                return;
+            }
+
+            $this->_public_key = $public_key;
+            $this->_private_key = $private_key;
+            $this->_key_len = $public_key->getKeyLength();
+            $this->_attrs = $rsa_attrs;
+        } else {
+            // generate key pair
+            if (!$this->generate($key_len)) {
+                // error during generating key pair
+                return;
+            }
+        }
+    }
+
+    /**
+     * Crypt_RSA_KeyPair factory.
+     *
+     * Wrapper - Name of math wrapper, which will be used to
+     *        perform different operations with big integers.
+     *        See contents of Crypt/RSA/Math folder for examples of wrappers.
+     *        Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
+     *
+     * @param int      $key_len          bit length of key pair, which will be generated in constructor
+     * @param string   $wrapper_name     wrapper name
+     * @param string   $error_handler    name of error handler function
+     * @param callback $random_generator function which will be used as random generator
+     *
+     * @return object   new Crypt_RSA_KeyPair object on success or PEAR_Error object on failure
+     * @access public
+     */
+    function &factory($key_len, $wrapper_name = 'default', $error_handler = '', $random_generator = null)
+    {
+        $obj = &new Crypt_RSA_KeyPair($key_len, $wrapper_name, $error_handler, $random_generator);
+        if ($obj->isError()) {
+            // error during creating a new object. Return PEAR_Error object
+            return $obj->getLastError();
+        }
+        // object created successfully. Return it
+        return $obj;
+    }
+
+    /**
+     * Generates new Crypt_RSA key pair with length $key_len.
+     * If $key_len is missed, use an old key length from $this->_key_len
+     *
+     * @param int $key_len bit length of key pair, which will be generated
+     *
+     * @return bool         true on success or false on error
+     * @access public
+     */
+    function generate($key_len = null)
+    {
+        if (is_null($key_len)) {
+            // use an old key length
+            $key_len = $this->_key_len;
+            if (is_null($key_len)) {
+                $this->pushError('missing key_len parameter', CRYPT_RSA_ERROR_MISSING_KEY_LEN);
+                return false;
+            }
+        }
+
+        // minimal key length is 8 bit ;)
+        if ($key_len < 8) {
+            $key_len = 8;
+        }
+        // store key length in the _key_len property
+        $this->_key_len = $key_len;
+
+        // set [e] to 0x10001 (65537)
+        $e = $this->_math_obj->bin2int("\x01\x00\x01");
+
+        // generate [p], [q] and [n]
+        $p_len = intval(($key_len + 1) / 2);
+        $q_len = $key_len - $p_len;
+        $p1 = $q1 = 0;
+        do {
+            // generate prime number [$p] with length [$p_len] with the following condition:
+            // GCD($e, $p - 1) = 1
+            do {
+                $p = $this->_math_obj->getPrime($p_len, $this->_random_generator);
+                $p1 = $this->_math_obj->dec($p);
+                $tmp = $this->_math_obj->GCD($e, $p1);
+            } while (!$this->_math_obj->isOne($tmp));
+            // generate prime number [$q] with length [$q_len] with the following conditions:
+            // GCD($e, $q - 1) = 1
+            // $q != $p
+            do {
+                $q = $this->_math_obj->getPrime($q_len, $this->_random_generator);
+                $q1 = $this->_math_obj->dec($q);
+                $tmp = $this->_math_obj->GCD($e, $q1);
+            } while (!$this->_math_obj->isOne($tmp) && !$this->_math_obj->cmpAbs($q, $p));
+            // if (p < q), then exchange them
+            if ($this->_math_obj->cmpAbs($p, $q) < 0) {
+                $tmp = $p;
+                $p = $q;
+                $q = $tmp;
+                $tmp = $p1;
+                $p1 = $q1;
+                $q1 = $tmp;
+            }
+            // calculate n = p * q
+            $n = $this->_math_obj->mul($p, $q);
+        } while ($this->_math_obj->bitLen($n) != $key_len);
+
+        // calculate d = 1/e mod (p - 1) * (q - 1)
+        $pq = $this->_math_obj->mul($p1, $q1);
+        $d = $this->_math_obj->invmod($e, $pq);
+
+        // calculate dmp1 = d mod (p - 1)
+        $dmp1 = $this->_math_obj->mod($d, $p1);
+
+        // calculate dmq1 = d mod (q - 1)
+        $dmq1 = $this->_math_obj->mod($d, $q1);
+
+        // calculate iqmp = 1/q mod p
+        $iqmp = $this->_math_obj->invmod($q, $p);
+
+        // store RSA keypair attributes
+        $this->_attrs = array(
+            'version' => "\x00",
+            'n' => $this->_math_obj->int2bin($n),
+            'e' => $this->_math_obj->int2bin($e),
+            'd' => $this->_math_obj->int2bin($d),
+            'p' => $this->_math_obj->int2bin($p),
+            'q' => $this->_math_obj->int2bin($q),
+            'dmp1' => $this->_math_obj->int2bin($dmp1),
+            'dmq1' => $this->_math_obj->int2bin($dmq1),
+            'iqmp' => $this->_math_obj->int2bin($iqmp),
+        );
+
+        $n = $this->_attrs['n'];
+        $e = $this->_attrs['e'];
+        $d = $this->_attrs['d'];
+
+        // try to create public key object
+        $obj = &new Crypt_RSA_Key($n, $e, 'public', $this->_math_obj->getWrapperName(), $this->_error_handler);
+        if ($obj->isError()) {
+            // error during creating public object
+            $this->pushError($obj->getLastError());
+            return false;
+        }
+        $this->_public_key = &$obj;
+
+        // try to create private key object
+        $obj = &new Crypt_RSA_Key($n, $d, 'private', $this->_math_obj->getWrapperName(), $this->_error_handler);
+        if ($obj->isError()) {
+            // error during creating private key object
+            $this->pushError($obj->getLastError());
+            return false;
+        }
+        $this->_private_key = &$obj;
+
+        return true; // key pair successfully generated
+    }
+
+    /**
+     * Returns public key from the pair
+     *
+     * @return object  public key object of class Crypt_RSA_Key
+     * @access public
+     */
+    function getPublicKey()
+    {
+        return $this->_public_key;
+    }
+
+    /**
+     * Returns private key from the pair
+     *
+     * @return object   private key object of class Crypt_RSA_Key
+     * @access public
+     */
+    function getPrivateKey()
+    {
+        return $this->_private_key;
+    }
+
+    /**
+     * Sets name of random generator function for key generation.
+     * If parameter is skipped, then sets to default random generator.
+     *
+     * Random generator function must return integer with at least 8 lower
+     * significant bits, which will be used as random values.
+     *
+     * @param string $random_generator name of random generator function
+     *
+     * @return bool                     true on success or false on error
+     * @access public
+     */
+    function setRandomGenerator($random_generator = null)
+    {
+        static $default_random_generator = null;
+
+        if (is_string($random_generator)) {
+            // set user's random generator
+            if (!function_exists($random_generator)) {
+                $this->pushError("can't find random generator function with name [{$random_generator}]");
+                return false;
+            }
+            $this->_random_generator = $random_generator;
+        } else {
+            // set default random generator
+            $this->_random_generator = is_null($default_random_generator) ?
+                ($default_random_generator = create_function('', '$a=explode(" ",microtime());return(int)($a[0]*1000000);')) :
+                $default_random_generator;
+        }
+        return true;
+    }
+
+    /**
+     * Returns length of each key in the key pair
+     *
+     * @return int  bit length of each key in key pair
+     * @access public
+     */
+    function getKeyLength()
+    {
+        return $this->_key_len;
+    }
+
+    /**
+     * Retrieves RSA keypair from PEM-encoded string, containing RSA private key.
+     * Example of such string:
+     * -----BEGIN RSA PRIVATE KEY-----
+     * MCsCAQACBHtvbSECAwEAAQIEeYrk3QIDAOF3AgMAjCcCAmdnAgJMawIDALEk
+     * -----END RSA PRIVATE KEY-----
+     *
+     * Wrapper: Name of math wrapper, which will be used to
+     * perform different operations with big integers.
+     * See contents of Crypt/RSA/Math folder for examples of wrappers.
+     * Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
+     *
+     * @param string $str           PEM-encoded string
+     * @param string $wrapper_name  Wrapper name
+     * @param string $error_handler name of error handler function
+     *
+     * @return Crypt_RSA_KeyPair object on success, PEAR_Error object on error
+     * @access public
+     * @static
+     */
+    function &fromPEMString($str, $wrapper_name = 'default', $error_handler = '')
+    {
+        if (isset($this)) {
+            if ($wrapper_name == 'default') {
+                $wrapper_name = $this->_math_obj->getWrapperName();
+            }
+            if ($error_handler == '') {
+                $error_handler = $this->_error_handler;
+            }
+        }
+        $err_handler = &new Crypt_RSA_ErrorHandler;
+        $err_handler->setErrorHandler($error_handler);
+
+        // search for base64-encoded private key
+        if (!preg_match('/-----BEGIN RSA PRIVATE KEY-----([^-]+)-----END RSA PRIVATE KEY-----/', $str, $matches)) {
+            $err_handler->pushError("can't find RSA private key in the string [{$str}]");
+            return $err_handler->getLastError();
+        }
+
+        // parse private key. It is ASN.1-encoded
+        $str = base64_decode($matches[1]);
+        $pos = 0;
+        $tmp = Crypt_RSA_KeyPair::_ASN1Parse($str, $pos, $err_handler);
+        if ($err_handler->isError()) {
+            return $err_handler->getLastError();
+        }
+        if ($tmp['tag'] != 0x10) {
+            $errstr = sprintf("wrong ASN tag value: 0x%02x. Expected 0x10 (SEQUENCE)", $tmp['tag']);
+            $err_handler->pushError($errstr);
+            return $err_handler->getLastError();
+        }
+
+        // parse ASN.1 SEQUENCE for RSA private key
+        $attr_names = Crypt_RSA_KeyPair::_get_attr_names();
+        $n = sizeof($attr_names);
+        $rsa_attrs = array();
+        for ($i = 0; $i < $n; $i++) {
+            $tmp = Crypt_RSA_KeyPair::_ASN1ParseInt($str, $pos, $err_handler);
+            if ($err_handler->isError()) {
+                return $err_handler->getLastError();
+            }
+            $attr = $attr_names[$i];
+            $rsa_attrs[$attr] = $tmp;
+        }
+
+        // create Crypt_RSA_KeyPair object.
+        $keypair = &new Crypt_RSA_KeyPair($rsa_attrs, $wrapper_name, $error_handler);
+        if ($keypair->isError()) {
+            return $keypair->getLastError();
+        }
+
+        return $keypair;
+    }
+
+    /**
+     * converts keypair to PEM-encoded string, which can be stroed in 
+     * .pem compatible files, contianing RSA private key.
+     *
+     * @return string PEM-encoded keypair on success, false on error
+     * @access public
+     */
+    function toPEMString()
+    {
+        // store RSA private key attributes into ASN.1 string
+        $str = '';
+        $attr_names = $this->_get_attr_names();
+        $n = sizeof($attr_names);
+        $rsa_attrs = $this->_attrs;
+        for ($i = 0; $i < $n; $i++) {
+            $attr = $attr_names[$i];
+            if (!isset($rsa_attrs[$attr])) {
+                $this->pushError("Cannot find value for ASN.1 attribute [$attr]");
+                return false;
+            }
+            $tmp = $rsa_attrs[$attr];
+            $str .= Crypt_RSA_KeyPair::_ASN1StoreInt($tmp);
+        }
+
+        // prepend $str by ASN.1 SEQUENCE (0x10) header
+        $str = Crypt_RSA_KeyPair::_ASN1Store($str, 0x10, true);
+
+        // encode and format PEM string
+        $str = base64_encode($str);
+        $str = chunk_split($str, 64, "\n");
+        return "-----BEGIN RSA PRIVATE KEY-----\n$str-----END RSA PRIVATE KEY-----\n";
+    }
+
+    /**
+     * Compares keypairs in Crypt_RSA_KeyPair objects $this and $key_pair
+     *
+     * @param Crypt_RSA_KeyPair $key_pair  keypair to compare
+     *
+     * @return bool  true, if keypair stored in $this equal to keypair stored in $key_pair
+     * @access public
+     */
+    function isEqual($key_pair)
+    {
+        $attr_names = $this->_get_attr_names();
+        foreach ($attr_names as $attr) {
+            if ($this->_attrs[$attr] != $key_pair->_attrs[$attr]) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
+
+?>
diff --git a/plugins/OStatus/extlib/Crypt/RSA/Math/BCMath.php b/plugins/OStatus/extlib/Crypt/RSA/Math/BCMath.php
new file mode 100644
index 0000000000..646ff67103
--- /dev/null
+++ b/plugins/OStatus/extlib/Crypt/RSA/Math/BCMath.php
@@ -0,0 +1,482 @@
+<?php
+/**
+ * Crypt_RSA allows to do following operations:
+ *     - key pair generation
+ *     - encryption and decryption
+ *     - signing and sign validation
+ *
+ * PHP versions 4 and 5
+ *
+ * LICENSE: This source file is subject to version 3.0 of the PHP license
+ * that is available through the world-wide-web at the following URI:
+ * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
+ * the PHP License and are unable to obtain it through the web, please
+ * send a note to license@php.net so we can mail you a copy immediately.
+ *
+ * @category   Encryption
+ * @package    Crypt_RSA
+ * @author     Alexander Valyalkin <valyala@gmail.com>
+ * @copyright  2006 Alexander Valyalkin
+ * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @version    1.2.0b
+ * @link       http://pear.php.net/package/Crypt_RSA
+ */
+
+/**
+ * Crypt_RSA_Math_BCMath class.
+ *
+ * Provides set of math functions, which are used by Crypt_RSA package
+ * This class is a wrapper for PHP BCMath extension.
+ * See http://php.net/manual/en/ref.bc.php for details.
+ *
+ * @category   Encryption
+ * @package    Crypt_RSA
+ * @author     Alexander Valyalkin <valyala@gmail.com>
+ * @copyright  2005, 2006 Alexander Valyalkin
+ * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @link       http://pear.php.net/package/Crypt_RSA
+ * @version    @package_version@
+ * @access     public
+ */
+class Crypt_RSA_Math_BCMath
+{
+    /**
+     * error description
+     *
+     * @var string
+     * @access public
+     */
+    var $errstr = '';
+
+    /**
+     * Performs Miller-Rabin primality test for number $num 
+     * with base $base. Returns true, if $num is strong pseudoprime
+     * by base $base. Else returns false.
+     *
+     * @param string $num
+     * @param string $base
+     * @return bool
+     * @access private
+     */
+    function _millerTest($num, $base)
+    {
+        if (!bccomp($num, '1')) {
+            // 1 is not prime ;)
+            return false;
+        }
+        $tmp = bcsub($num, '1');
+
+        $zero_bits = 0;
+        while (!bccomp(bcmod($tmp, '2'), '0')) {
+            $zero_bits++;
+            $tmp = bcdiv($tmp, '2');
+        }
+
+        $tmp = $this->powmod($base, $tmp, $num);
+        if (!bccomp($tmp, '1')) {
+            // $num is probably prime
+            return true;
+        }
+
+        while ($zero_bits--) {
+            if (!bccomp(bcadd($tmp, '1'), $num)) {
+                // $num is probably prime
+                return true;
+            }
+            $tmp = $this->powmod($tmp, '2', $num);
+        }
+        // $num is composite
+        return false;
+    }
+
+    /**
+     * Crypt_RSA_Math_BCMath constructor.
+     * Checks an existance of PHP BCMath extension.
+     * On failure saves error description in $this->errstr
+     *
+     * @access public
+     */
+    function Crypt_RSA_Math_BCMath()
+    {
+        if (!extension_loaded('bcmath')) {
+            if (!@dl('bcmath.' . PHP_SHLIB_SUFFIX) && !@dl('php_bcmath.' . PHP_SHLIB_SUFFIX)) {
+                // cannot load BCMath extension. Set error string
+                $this->errstr = 'Crypt_RSA package requires the BCMath extension. See http://php.net/manual/en/ref.bc.php for details';
+                return;
+            }
+        }
+    }
+
+    /**
+     * Transforms binary representation of large integer into its native form.
+     * 
+     * Example of transformation:
+     *    $str = "\x12\x34\x56\x78\x90";
+     *    $num = 0x9078563412;
+     *
+     * @param string $str
+     * @return string
+     * @access public
+     */
+    function bin2int($str)
+    {
+        $result = '0';
+        $n = strlen($str);
+        do {
+            $result = bcadd(bcmul($result, '256'), ord($str{--$n}));
+        } while ($n > 0);
+        return $result;
+    }
+
+    /**
+     * Transforms large integer into binary representation.
+     * 
+     * Example of transformation:
+     *    $num = 0x9078563412;
+     *    $str = "\x12\x34\x56\x78\x90";
+     *
+     * @param string $num
+     * @return string
+     * @access public
+     */
+    function int2bin($num)
+    {
+        $result = '';
+        do {
+            $result .= chr(bcmod($num, '256'));
+            $num = bcdiv($num, '256');
+        } while (bccomp($num, '0'));
+        return $result;
+    }
+
+    /**
+     * Calculates pow($num, $pow) (mod $mod)
+     *
+     * @param string $num
+     * @param string $pow
+     * @param string $mod
+     * @return string
+     * @access public
+     */
+    function powmod($num, $pow, $mod)
+    {
+        if (function_exists('bcpowmod')) {
+            // bcpowmod is only available under PHP5
+            return bcpowmod($num, $pow, $mod);
+        }
+
+        // emulate bcpowmod
+        $result = '1';
+        do {
+            if (!bccomp(bcmod($pow, '2'), '1')) {
+                $result = bcmod(bcmul($result, $num), $mod);
+            }
+            $num = bcmod(bcpow($num, '2'), $mod);
+            $pow = bcdiv($pow, '2');
+        } while (bccomp($pow, '0'));
+        return $result;
+    }
+
+    /**
+     * Calculates $num1 * $num2
+     *
+     * @param string $num1
+     * @param string $num2
+     * @return string
+     * @access public
+     */
+    function mul($num1, $num2)
+    {
+        return bcmul($num1, $num2);
+    }
+
+    /**
+     * Calculates $num1 % $num2
+     *
+     * @param string $num1
+     * @param string $num2
+     * @return string
+     * @access public
+     */
+    function mod($num1, $num2)
+    {
+        return bcmod($num1, $num2);
+    }
+
+    /**
+     * Compares abs($num1) to abs($num2).
+     * Returns:
+     *   -1, if abs($num1) < abs($num2)
+     *   0, if abs($num1) == abs($num2)
+     *   1, if abs($num1) > abs($num2)
+     *
+     * @param string $num1
+     * @param string $num2
+     * @return int
+     * @access public
+     */
+    function cmpAbs($num1, $num2)
+    {
+        return bccomp($num1, $num2);
+    }
+
+    /**
+     * Tests $num on primality. Returns true, if $num is strong pseudoprime.
+     * Else returns false.
+     *
+     * @param string $num
+     * @return bool
+     * @access private
+     */
+    function isPrime($num)
+    {
+        static $primes = null;
+        static $primes_cnt = 0;
+        if (is_null($primes)) {
+            // generate all primes up to 10000
+            $primes = array();
+            for ($i = 0; $i < 10000; $i++) {
+                $primes[] = $i;
+            }
+            $primes[0] = $primes[1] = 0;
+            for ($i = 2; $i < 100; $i++) {
+                while (!$primes[$i]) {
+                    $i++;
+                }
+                $j = $i;
+                for ($j += $i; $j < 10000; $j += $i) {
+                    $primes[$j] = 0;
+                }
+            }
+            $j = 0;
+            for ($i = 0; $i < 10000; $i++) {
+                if ($primes[$i]) {
+                    $primes[$j++] = $primes[$i];
+                }
+            }
+            $primes_cnt = $j;
+        }
+
+        // try to divide number by small primes
+        for ($i = 0; $i < $primes_cnt; $i++) {
+            if (bccomp($num, $primes[$i]) <= 0) {
+                // number is prime
+                return true;
+            }
+            if (!bccomp(bcmod($num, $primes[$i]), '0')) {
+                // number divides by $primes[$i]
+                return false;
+            }
+        }
+
+        /*
+            try Miller-Rabin's probable-primality test for first
+            7 primes as bases
+        */
+        for ($i = 0; $i < 7; $i++) {
+            if (!$this->_millerTest($num, $primes[$i])) {
+                // $num is composite
+                return false;
+            }
+        }
+        // $num is strong pseudoprime
+        return true;
+    }
+
+    /**
+     * Generates prime number with length $bits_cnt
+     * using $random_generator as random generator function.
+     *
+     * @param int $bits_cnt
+     * @param string $rnd_generator
+     * @access public
+     */
+    function getPrime($bits_cnt, $random_generator)
+    {
+        $bytes_n = intval($bits_cnt / 8);
+        $bits_n = $bits_cnt % 8;
+        do {
+            $str = '';
+            for ($i = 0; $i < $bytes_n; $i++) {
+                $str .= chr(call_user_func($random_generator) & 0xff);
+            }
+            $n = call_user_func($random_generator) & 0xff;
+            $n |= 0x80;
+            $n >>= 8 - $bits_n;
+            $str .= chr($n);
+            $num = $this->bin2int($str);
+
+            // search for the next closest prime number after [$num]
+            if (!bccomp(bcmod($num, '2'), '0')) {
+                $num = bcadd($num, '1');
+            }
+            while (!$this->isPrime($num)) {
+                $num = bcadd($num, '2');
+            }
+        } while ($this->bitLen($num) != $bits_cnt);
+        return $num;
+    }
+
+    /**
+     * Calculates $num - 1
+     *
+     * @param string $num
+     * @return string
+     * @access public
+     */
+    function dec($num)
+    {
+        return bcsub($num, '1');
+    }
+
+    /**
+     * Returns true, if $num is equal to one. Else returns false
+     *
+     * @param string $num
+     * @return bool
+     * @access public
+     */
+    function isOne($num)
+    {
+        return !bccomp($num, '1');
+    }
+
+    /**
+     * Finds greatest common divider (GCD) of $num1 and $num2
+     *
+     * @param string $num1
+     * @param string $num2
+     * @return string
+     * @access public
+     */
+    function GCD($num1, $num2)
+    {
+        do {
+            $tmp = bcmod($num1, $num2);
+            $num1 = $num2;
+            $num2 = $tmp;
+        } while (bccomp($num2, '0'));
+        return $num1;
+    }
+
+    /**
+     * Finds inverse number $inv for $num by modulus $mod, such as:
+     *     $inv * $num = 1 (mod $mod)
+     *
+     * @param string $num
+     * @param string $mod
+     * @return string
+     * @access public
+     */
+    function invmod($num, $mod)
+    {
+        $x = '1';
+        $y = '0';
+        $num1 = $mod;
+        do {
+            $tmp = bcmod($num, $num1);
+            $q = bcdiv($num, $num1);
+            $num = $num1;
+            $num1 = $tmp;
+
+            $tmp = bcsub($x, bcmul($y, $q));
+            $x = $y;
+            $y = $tmp;
+        } while (bccomp($num1, '0'));
+        if (bccomp($x, '0') < 0) {
+            $x = bcadd($x, $mod);
+        }
+        return $x;
+    }
+
+    /**
+     * Returns bit length of number $num
+     *
+     * @param string $num
+     * @return int
+     * @access public
+     */
+    function bitLen($num)
+    {
+        $tmp = $this->int2bin($num);
+        $bit_len = strlen($tmp) * 8;
+        $tmp = ord($tmp{strlen($tmp) - 1});
+        if (!$tmp) {
+            $bit_len -= 8;
+        }
+        else {
+            while (!($tmp & 0x80)) {
+                $bit_len--;
+                $tmp <<= 1;
+            }
+        }
+        return $bit_len;
+    }
+
+    /**
+     * Calculates bitwise or of $num1 and $num2,
+     * starting from bit $start_pos for number $num1
+     *
+     * @param string $num1
+     * @param string $num2
+     * @param int $start_pos
+     * @return string
+     * @access public
+     */
+    function bitOr($num1, $num2, $start_pos)
+    {
+        $start_byte = intval($start_pos / 8);
+        $start_bit = $start_pos % 8;
+        $tmp1 = $this->int2bin($num1);
+
+        $num2 = bcmul($num2, 1 << $start_bit);
+        $tmp2 = $this->int2bin($num2);
+        if ($start_byte < strlen($tmp1)) {
+            $tmp2 |= substr($tmp1, $start_byte);
+            $tmp1 = substr($tmp1, 0, $start_byte) . $tmp2;
+        }
+        else {
+            $tmp1 = str_pad($tmp1, $start_byte, "\0") . $tmp2;
+        }
+        return $this->bin2int($tmp1);
+    }
+
+    /**
+     * Returns part of number $num, starting at bit
+     * position $start with length $length
+     *
+     * @param string $num
+     * @param int start
+     * @param int length
+     * @return string
+     * @access public
+     */
+    function subint($num, $start, $length)
+    {
+        $start_byte = intval($start / 8);
+        $start_bit = $start % 8;
+        $byte_length = intval($length / 8);
+        $bit_length = $length % 8;
+        if ($bit_length) {
+            $byte_length++;
+        }
+        $num = bcdiv($num, 1 << $start_bit);
+        $tmp = substr($this->int2bin($num), $start_byte, $byte_length);
+        $tmp = str_pad($tmp, $byte_length, "\0");
+        $tmp = substr_replace($tmp, $tmp{$byte_length - 1} & chr(0xff >> (8 - $bit_length)), $byte_length - 1, 1);
+        return $this->bin2int($tmp);
+    }
+
+    /**
+     * Returns name of current wrapper
+     *
+     * @return string name of current wrapper
+     * @access public
+     */
+    function getWrapperName()
+    {
+        return 'BCMath';
+    }
+}
+
+?>
\ No newline at end of file
diff --git a/plugins/OStatus/extlib/Crypt/RSA/Math/BigInt.php b/plugins/OStatus/extlib/Crypt/RSA/Math/BigInt.php
new file mode 100644
index 0000000000..b7ac24cb66
--- /dev/null
+++ b/plugins/OStatus/extlib/Crypt/RSA/Math/BigInt.php
@@ -0,0 +1,313 @@
+<?php
+/**
+ * Crypt_RSA allows to do following operations:
+ *     - key pair generation
+ *     - encryption and decryption
+ *     - signing and sign validation
+ *
+ * PHP versions 4 and 5
+ *
+ * LICENSE: This source file is subject to version 3.0 of the PHP license
+ * that is available through the world-wide-web at the following URI:
+ * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
+ * the PHP License and are unable to obtain it through the web, please
+ * send a note to license@php.net so we can mail you a copy immediately.
+ *
+ * @category   Encryption
+ * @package    Crypt_RSA
+ * @author     Alexander Valyalkin <valyala@gmail.com>
+ * @copyright  2005, 2006 Alexander Valyalkin
+ * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @version    1.2.0b
+ * @link       http://pear.php.net/package/Crypt_RSA
+ */
+
+/**
+ * Crypt_RSA_Math_BigInt class.
+ *
+ * Provides set of math functions, which are used by Crypt_RSA package
+ * This class is a wrapper for big_int PECL extension,
+ * which could be loaded from http://pecl.php.net/packages/big_int
+ *
+ * @category   Encryption
+ * @package    Crypt_RSA
+ * @author     Alexander Valyalkin <valyala@gmail.com>
+ * @copyright  2005, 2006 Alexander Valyalkin
+ * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @link       http://pear.php.net/package/Crypt_RSA
+ * @version    @package_version@
+ * @access     public
+ */
+class Crypt_RSA_Math_BigInt
+{
+    /**
+     * error description
+     *
+     * @var string
+     * @access public
+     */
+    var $errstr = '';
+
+    /**
+     * Crypt_RSA_Math_BigInt constructor.
+     * Checks an existance of big_int PECL math package.
+     * This package is available at http://pecl.php.net/packages/big_int
+     * On failure saves error description in $this->errstr
+     *
+     * @access public
+     */
+    function Crypt_RSA_Math_BigInt()
+    {
+        if (!extension_loaded('big_int')) {
+            if (!@dl('big_int.' . PHP_SHLIB_SUFFIX) && !@dl('php_big_int.' . PHP_SHLIB_SUFFIX)) {
+                // cannot load big_int extension
+                $this->errstr = 'Crypt_RSA package requires big_int PECL package. ' .
+                     'It is available at http://pecl.php.net/packages/big_int';
+                return;
+            }
+        }
+
+        // check version of big_int extension ( Crypt_RSA requires version 1.0.2 and higher )
+        if (!in_array('bi_info', get_extension_funcs('big_int'))) {
+            // there is no bi_info() function in versions, older than 1.0.2
+            $this->errstr = 'Crypt_RSA package requires big_int package version 1.0.2 and higher';
+        }
+    }
+
+    /**
+     * Transforms binary representation of large integer into its native form.
+     * 
+     * Example of transformation:
+     *    $str = "\x12\x34\x56\x78\x90";
+     *    $num = 0x9078563412;
+     *
+     * @param string $str
+     * @return big_int resource
+     * @access public
+     */
+    function bin2int($str)
+    {
+        return bi_unserialize($str);
+    }
+
+    /**
+     * Transforms large integer into binary representation.
+     * 
+     * Example of transformation:
+     *    $num = 0x9078563412;
+     *    $str = "\x12\x34\x56\x78\x90";
+     *
+     * @param big_int resource $num
+     * @return string
+     * @access public
+     */
+    function int2bin($num)
+    {
+        return bi_serialize($num);
+    }
+
+    /**
+     * Calculates pow($num, $pow) (mod $mod)
+     *
+     * @param big_int resource $num
+     * @param big_int resource $pow
+     * @param big_int resource $mod
+     * @return big_int resource
+     * @access public
+     */
+    function powmod($num, $pow, $mod)
+    {
+        return bi_powmod($num, $pow, $mod);
+    }
+
+    /**
+     * Calculates $num1 * $num2
+     *
+     * @param big_int resource $num1
+     * @param big_int resource $num2
+     * @return big_int resource
+     * @access public
+     */
+    function mul($num1, $num2)
+    {
+        return bi_mul($num1, $num2);
+    }
+
+    /**
+     * Calculates $num1 % $num2
+     *
+     * @param string $num1
+     * @param string $num2
+     * @return string
+     * @access public
+     */
+    function mod($num1, $num2)
+    {
+        return bi_mod($num1, $num2);
+    }
+
+    /**
+     * Compares abs($num1) to abs($num2).
+     * Returns:
+     *   -1, if abs($num1) < abs($num2)
+     *   0, if abs($num1) == abs($num2)
+     *   1, if abs($num1) > abs($num2)
+     *
+     * @param big_int resource $num1
+     * @param big_int resource $num2
+     * @return int
+     * @access public
+     */
+    function cmpAbs($num1, $num2)
+    {
+        return bi_cmp_abs($num1, $num2);
+    }
+
+    /**
+     * Tests $num on primality. Returns true, if $num is strong pseudoprime.
+     * Else returns false.
+     *
+     * @param string $num
+     * @return bool
+     * @access private
+     */
+    function isPrime($num)
+    {
+        return bi_is_prime($num) ? true : false;
+    }
+
+    /**
+     * Generates prime number with length $bits_cnt
+     * using $random_generator as random generator function.
+     *
+     * @param int $bits_cnt
+     * @param string $rnd_generator
+     * @access public
+     */
+    function getPrime($bits_cnt, $random_generator)
+    {
+        $bytes_n = intval($bits_cnt / 8);
+        $bits_n = $bits_cnt % 8;
+        do {
+            $str = '';
+            for ($i = 0; $i < $bytes_n; $i++) {
+                $str .= chr(call_user_func($random_generator) & 0xff);
+            }
+            $n = call_user_func($random_generator) & 0xff;
+            $n |= 0x80;
+            $n >>= 8 - $bits_n;
+            $str .= chr($n);
+            $num = $this->bin2int($str);
+
+            // search for the next closest prime number after [$num]
+            $num = bi_next_prime($num);
+        } while ($this->bitLen($num) != $bits_cnt);
+        return $num;
+    }
+
+    /**
+     * Calculates $num - 1
+     *
+     * @param big_int resource $num
+     * @return big_int resource
+     * @access public
+     */
+    function dec($num)
+    {
+        return bi_dec($num);
+    }
+
+    /**
+     * Returns true, if $num is equal to 1. Else returns false
+     *
+     * @param big_int resource $num
+     * @return bool
+     * @access public
+     */
+    function isOne($num)
+    {
+        return bi_is_one($num);
+    }
+
+    /**
+     * Finds greatest common divider (GCD) of $num1 and $num2
+     *
+     * @param big_int resource $num1
+     * @param big_int resource $num2
+     * @return big_int resource
+     * @access public
+     */
+    function GCD($num1, $num2)
+    {
+        return bi_gcd($num1, $num2);
+    }
+
+    /**
+     * Finds inverse number $inv for $num by modulus $mod, such as:
+     *     $inv * $num = 1 (mod $mod)
+     *
+     * @param big_int resource $num
+     * @param big_int resource $mod
+     * @return big_int resource
+     * @access public
+     */
+    function invmod($num, $mod)
+    {
+        return bi_invmod($num, $mod);
+    }
+
+    /**
+     * Returns bit length of number $num
+     *
+     * @param big_int resource $num
+     * @return int
+     * @access public
+     */
+    function bitLen($num)
+    {
+        return bi_bit_len($num);
+    }
+
+    /**
+     * Calculates bitwise or of $num1 and $num2,
+     * starting from bit $start_pos for number $num1
+     *
+     * @param big_int resource $num1
+     * @param big_int resource $num2
+     * @param int $start_pos
+     * @return big_int resource
+     * @access public
+     */
+    function bitOr($num1, $num2, $start_pos)
+    {
+        return bi_or($num1, $num2, $start_pos);
+    }
+
+    /**
+     * Returns part of number $num, starting at bit
+     * position $start with length $length
+     *
+     * @param big_int resource $num
+     * @param int start
+     * @param int length
+     * @return big_int resource
+     * @access public
+     */
+    function subint($num, $start, $length)
+    {
+        return bi_subint($num, $start, $length);
+    }
+
+    /**
+     * Returns name of current wrapper
+     *
+     * @return string name of current wrapper
+     * @access public
+     */
+    function getWrapperName()
+    {
+        return 'BigInt';
+    }
+}
+
+?>
\ No newline at end of file
diff --git a/plugins/OStatus/extlib/Crypt/RSA/Math/GMP.php b/plugins/OStatus/extlib/Crypt/RSA/Math/GMP.php
new file mode 100644
index 0000000000..54e4c34fce
--- /dev/null
+++ b/plugins/OStatus/extlib/Crypt/RSA/Math/GMP.php
@@ -0,0 +1,361 @@
+<?php
+/**
+ * Crypt_RSA allows to do following operations:
+ *     - key pair generation
+ *     - encryption and decryption
+ *     - signing and sign validation
+ *
+ * PHP versions 4 and 5
+ *
+ * LICENSE: This source file is subject to version 3.0 of the PHP license
+ * that is available through the world-wide-web at the following URI:
+ * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
+ * the PHP License and are unable to obtain it through the web, please
+ * send a note to license@php.net so we can mail you a copy immediately.
+ *
+ * @category   Encryption
+ * @package    Crypt_RSA
+ * @author     Alexander Valyalkin <valyala@gmail.com>
+ * @copyright  2005, 2006 Alexander Valyalkin
+ * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @version    1.2.0b
+ * @link       http://pear.php.net/package/Crypt_RSA
+ */
+
+/**
+ * Crypt_RSA_Math_GMP class.
+ *
+ * Provides set of math functions, which are used by Crypt_RSA package
+ * This class is a wrapper for PHP GMP extension.
+ * See http://php.net/gmp for details.
+ *
+ * @category   Encryption
+ * @package    Crypt_RSA
+ * @author     Alexander Valyalkin <valyala@gmail.com>
+ * @copyright  2005, 2006 Alexander Valyalkin
+ * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @link       http://pear.php.net/package/Crypt_RSA
+ * @version    @package_version@
+ * @access     public
+ */
+class Crypt_RSA_Math_GMP
+{
+    /**
+     * error description
+     *
+     * @var string
+     * @access public
+     */
+    var $errstr = '';
+
+    /**
+     * Crypt_RSA_Math_GMP constructor.
+     * Checks an existance of PHP GMP package.
+     * See http://php.net/gmp for details.
+     *
+     * On failure saves error description in $this->errstr
+     *
+     * @access public
+     */
+    function Crypt_RSA_Math_GMP()
+    {
+        if (!extension_loaded('gmp')) {
+            if (!@dl('gmp.' . PHP_SHLIB_SUFFIX) && !@dl('php_gmp.' . PHP_SHLIB_SUFFIX)) {
+                // cannot load GMP extension
+                $this->errstr = 'Crypt_RSA package requires PHP GMP package. ' .
+                     'See http://php.net/gmp for details';
+                return;
+            }
+        }
+    }
+
+    /**
+     * Transforms binary representation of large integer into its native form.
+     * 
+     * Example of transformation:
+     *    $str = "\x12\x34\x56\x78\x90";
+     *    $num = 0x9078563412;
+     *
+     * @param string $str
+     * @return gmp resource
+     * @access public
+     */
+    function bin2int($str)
+    {
+        $result = 0;
+        $n = strlen($str);
+        do {
+            // dirty hack: GMP returns FALSE, when second argument equals to int(0).
+            // so, it must be converted to string '0'
+            $result = gmp_add(gmp_mul($result, 256), strval(ord($str{--$n})));
+        } while ($n > 0);
+        return $result;
+    }
+
+    /**
+     * Transforms large integer into binary representation.
+     * 
+     * Example of transformation:
+     *    $num = 0x9078563412;
+     *    $str = "\x12\x34\x56\x78\x90";
+     *
+     * @param gmp resource $num
+     * @return string
+     * @access public
+     */
+    function int2bin($num)
+    {
+        $result = '';
+        do {
+            $result .= chr(gmp_intval(gmp_mod($num, 256)));
+            $num = gmp_div($num, 256);
+        } while (gmp_cmp($num, 0));
+        return $result;
+    }
+
+    /**
+     * Calculates pow($num, $pow) (mod $mod)
+     *
+     * @param gmp resource $num
+     * @param gmp resource $pow
+     * @param gmp resource $mod
+     * @return gmp resource
+     * @access public
+     */
+    function powmod($num, $pow, $mod)
+    {
+        return gmp_powm($num, $pow, $mod);
+    }
+
+    /**
+     * Calculates $num1 * $num2
+     *
+     * @param gmp resource $num1
+     * @param gmp resource $num2
+     * @return gmp resource
+     * @access public
+     */
+    function mul($num1, $num2)
+    {
+        return gmp_mul($num1, $num2);
+    }
+
+    /**
+     * Calculates $num1 % $num2
+     *
+     * @param string $num1
+     * @param string $num2
+     * @return string
+     * @access public
+     */
+    function mod($num1, $num2)
+    {
+        return gmp_mod($num1, $num2);
+    }
+
+    /**
+     * Compares abs($num1) to abs($num2).
+     * Returns:
+     *   -1, if abs($num1) < abs($num2)
+     *   0, if abs($num1) == abs($num2)
+     *   1, if abs($num1) > abs($num2)
+     *
+     * @param gmp resource $num1
+     * @param gmp resource $num2
+     * @return int
+     * @access public
+     */
+    function cmpAbs($num1, $num2)
+    {
+        return gmp_cmp($num1, $num2);
+    }
+
+    /**
+     * Tests $num on primality. Returns true, if $num is strong pseudoprime.
+     * Else returns false.
+     *
+     * @param string $num
+     * @return bool
+     * @access private
+     */
+    function isPrime($num)
+    {
+        return gmp_prob_prime($num) ? true : false;
+    }
+
+    /**
+     * Generates prime number with length $bits_cnt
+     * using $random_generator as random generator function.
+     *
+     * @param int $bits_cnt
+     * @param string $rnd_generator
+     * @access public
+     */
+    function getPrime($bits_cnt, $random_generator)
+    {
+        $bytes_n = intval($bits_cnt / 8);
+        $bits_n = $bits_cnt % 8;
+        do {
+            $str = '';
+            for ($i = 0; $i < $bytes_n; $i++) {
+                $str .= chr(call_user_func($random_generator) & 0xff);
+            }
+            $n = call_user_func($random_generator) & 0xff;
+            $n |= 0x80;
+            $n >>= 8 - $bits_n;
+            $str .= chr($n);
+            $num = $this->bin2int($str);
+
+            // search for the next closest prime number after [$num]
+            if (!gmp_cmp(gmp_mod($num, '2'), '0')) {
+                $num = gmp_add($num, '1');
+            }
+            while (!gmp_prob_prime($num)) {
+                $num = gmp_add($num, '2');
+            }
+        } while ($this->bitLen($num) != $bits_cnt);
+        return $num;
+    }
+
+    /**
+     * Calculates $num - 1
+     *
+     * @param gmp resource $num
+     * @return gmp resource
+     * @access public
+     */
+    function dec($num)
+    {
+        return gmp_sub($num, 1);
+    }
+
+    /**
+     * Returns true, if $num is equal to one. Else returns false
+     *
+     * @param gmp resource $num
+     * @return bool
+     * @access public
+     */
+    function isOne($num)
+    {
+        return !gmp_cmp($num, 1);
+    }
+
+    /**
+     * Finds greatest common divider (GCD) of $num1 and $num2
+     *
+     * @param gmp resource $num1
+     * @param gmp resource $num2
+     * @return gmp resource
+     * @access public
+     */
+    function GCD($num1, $num2)
+    {
+        return gmp_gcd($num1, $num2);
+    }
+
+    /**
+     * Finds inverse number $inv for $num by modulus $mod, such as:
+     *     $inv * $num = 1 (mod $mod)
+     *
+     * @param gmp resource $num
+     * @param gmp resource $mod
+     * @return gmp resource
+     * @access public
+     */
+    function invmod($num, $mod)
+    {
+        return gmp_invert($num, $mod);
+    }
+
+    /**
+     * Returns bit length of number $num
+     *
+     * @param gmp resource $num
+     * @return int
+     * @access public
+     */
+    function bitLen($num)
+    {
+        $tmp = $this->int2bin($num);
+        $bit_len = strlen($tmp) * 8;
+        $tmp = ord($tmp{strlen($tmp) - 1});
+        if (!$tmp) {
+            $bit_len -= 8;
+        }
+        else {
+            while (!($tmp & 0x80)) {
+                $bit_len--;
+                $tmp <<= 1;
+            }
+        }
+        return $bit_len;
+    }
+
+    /**
+     * Calculates bitwise or of $num1 and $num2,
+     * starting from bit $start_pos for number $num1
+     *
+     * @param gmp resource $num1
+     * @param gmp resource $num2
+     * @param int $start_pos
+     * @return gmp resource
+     * @access public
+     */
+    function bitOr($num1, $num2, $start_pos)
+    {
+        $start_byte = intval($start_pos / 8);
+        $start_bit = $start_pos % 8;
+        $tmp1 = $this->int2bin($num1);
+
+        $num2 = gmp_mul($num2, 1 << $start_bit);
+        $tmp2 = $this->int2bin($num2);
+        if ($start_byte < strlen($tmp1)) {
+            $tmp2 |= substr($tmp1, $start_byte);
+            $tmp1 = substr($tmp1, 0, $start_byte) . $tmp2;
+        }
+        else {
+            $tmp1 = str_pad($tmp1, $start_byte, "\0") . $tmp2;
+        }
+        return $this->bin2int($tmp1);
+    }
+
+    /**
+     * Returns part of number $num, starting at bit
+     * position $start with length $length
+     *
+     * @param gmp resource $num
+     * @param int start
+     * @param int length
+     * @return gmp resource
+     * @access public
+     */
+    function subint($num, $start, $length)
+    {
+        $start_byte = intval($start / 8);
+        $start_bit = $start % 8;
+        $byte_length = intval($length / 8);
+        $bit_length = $length % 8;
+        if ($bit_length) {
+            $byte_length++;
+        }
+        $num = gmp_div($num, 1 << $start_bit);
+        $tmp = substr($this->int2bin($num), $start_byte, $byte_length);
+        $tmp = str_pad($tmp, $byte_length, "\0");
+        $tmp = substr_replace($tmp, $tmp{$byte_length - 1} & chr(0xff >> (8 - $bit_length)), $byte_length - 1, 1);
+        return $this->bin2int($tmp);
+    }
+
+    /**
+     * Returns name of current wrapper
+     *
+     * @return string name of current wrapper
+     * @access public
+     */
+    function getWrapperName()
+    {
+        return 'GMP';
+    }
+}
+
+?>
\ No newline at end of file
diff --git a/plugins/OStatus/extlib/Crypt/RSA/MathLoader.php b/plugins/OStatus/extlib/Crypt/RSA/MathLoader.php
new file mode 100644
index 0000000000..de6c94642f
--- /dev/null
+++ b/plugins/OStatus/extlib/Crypt/RSA/MathLoader.php
@@ -0,0 +1,135 @@
+<?php
+/**
+ * Crypt_RSA allows to do following operations:
+ *     - key pair generation
+ *     - encryption and decryption
+ *     - signing and sign validation
+ *
+ * PHP versions 4 and 5
+ *
+ * LICENSE: This source file is subject to version 3.0 of the PHP license
+ * that is available through the world-wide-web at the following URI:
+ * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
+ * the PHP License and are unable to obtain it through the web, please
+ * send a note to license@php.net so we can mail you a copy immediately.
+ *
+ * @category  Encryption
+ * @package   Crypt_RSA
+ * @author    Alexander Valyalkin <valyala@gmail.com>
+ * @copyright Alexander Valyalkin 2005
+ * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @version   CVS: $Id: MathLoader.php,v 1.5 2009/01/05 08:30:29 clockwerx Exp $
+ * @link      http://pear.php.net/package/Crypt_RSA
+ */
+
+/**
+ * RSA error handling facilities
+ */
+require_once 'Crypt/RSA/ErrorHandler.php';
+
+/**
+ * Crypt_RSA_MathLoader class.
+ *
+ * Provides static function:
+ *  - loadWrapper($wrapper_name) - loads RSA math wrapper with name $wrapper_name
+ *                                 or most suitable wrapper if $wrapper_name == 'default'
+ *
+ * Example usage:
+ *    // load BigInt wrapper
+ *    $big_int_wrapper = Crypt_RSA_MathLoader::loadWrapper('BigInt');
+ * 
+ *    // load BCMath wrapper
+ *    $bcmath_wrapper = Crypt_RSA_MathLoader::loadWrapper('BCMath');
+ * 
+ *    // load the most suitable wrapper
+ *    $bcmath_wrapper = Crypt_RSA_MathLoader::loadWrapper();
+ * 
+ * @category  Encryption
+ * @package   Crypt_RSA
+ * @author    Alexander Valyalkin <valyala@gmail.com>
+ * @copyright Alexander Valyalkin 2005
+ * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
+ * @version   Release: @package_version@
+ * @link      http://pear.php.net/package/Crypt_RSA
+ * @access    public
+ */
+class Crypt_RSA_MathLoader
+{
+    /**
+     * Loads RSA math wrapper with name $wrapper_name.
+     * Implemented wrappers can be found at Crypt/RSA/Math folder.
+     * Read docs/Crypt_RSA/docs/math_wrappers.txt for details
+     *
+     * This is a static function:
+     *    // load BigInt wrapper
+     *    $big_int_wrapper = &Crypt_RSA_MathLoader::loadWrapper('BigInt');
+     *
+     *    // load BCMath wrapper
+     *    $bcmath_wrapper = &Crypt_RSA_MathLoader::loadWrapper('BCMath');
+     *
+     * @param string $wrapper_name Name of wrapper
+     *
+     * @return object
+     *         Reference to object of wrapper with name $wrapper_name on success
+     *         or PEAR_Error object on error
+     *
+     * @access public
+     */
+    function loadWrapper($wrapper_name = 'default')
+    {
+        static $math_objects = array();
+        // ordered by performance. GMP is the fastest math library, BCMath - the slowest.
+        static $math_wrappers = array('GMP', 'BigInt', 'BCMath',);
+
+        if (isset($math_objects[$wrapper_name])) {
+            /*
+                wrapper with name $wrapper_name is already loaded and created.
+                Return reference to existing copy of wrapper
+            */
+            return $math_objects[$wrapper_name];
+        }
+
+        $err_handler = new Crypt_RSA_ErrorHandler();
+
+        if ($wrapper_name === 'default') {
+            // try to load the most suitable wrapper
+            $n = sizeof($math_wrappers);
+            for ($i = 0; $i < $n; $i++) {
+                $obj = Crypt_RSA_MathLoader::loadWrapper($math_wrappers[$i]);
+                if (!$err_handler->isError($obj)) {
+                    // wrapper for $math_wrappers[$i] successfully loaded
+                    // register it as default wrapper and return reference to it
+                    return $math_objects['default'] = $obj;
+                }
+            }
+            // can't load any wrapper
+            $err_handler->pushError("can't load any wrapper for existing math libraries", CRYPT_RSA_ERROR_NO_WRAPPERS);
+            return $err_handler->getLastError();
+        }
+
+        $class_name = 'Crypt_RSA_Math_' . $wrapper_name;
+        $class_filename = dirname(__FILE__) . '/Math/' . $wrapper_name . '.php';
+
+        if (!is_file($class_filename)) {
+            $err_handler->pushError("can't find file [{$class_filename}] for RSA math wrapper [{$wrapper_name}]", CRYPT_RSA_ERROR_NO_FILE);
+            return $err_handler->getLastError();
+        }
+
+        include_once $class_filename;
+        if (!class_exists($class_name)) {
+            $err_handler->pushError("can't find class [{$class_name}] in file [{$class_filename}]", CRYPT_RSA_ERROR_NO_CLASS);
+            return $err_handler->getLastError();
+        }
+
+        // create and return wrapper object on success or PEAR_Error object on error
+        $obj = new $class_name;
+        if ($obj->errstr) {
+            // cannot load required extension for math wrapper
+            $err_handler->pushError($obj->errstr, CRYPT_RSA_ERROR_NO_EXT);
+            return $err_handler->getLastError();
+        }
+        return $math_objects[$wrapper_name] = $obj;
+    }
+}
+
+?>
diff --git a/plugins/OStatus/lib/magicenvelope.php b/plugins/OStatus/lib/magicenvelope.php
new file mode 100644
index 0000000000..1ae80d70c1
--- /dev/null
+++ b/plugins/OStatus/lib/magicenvelope.php
@@ -0,0 +1,174 @@
+<?php
+/**
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * A sample module to show best practices for StatusNet plugins
+ *
+ * PHP version 5
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @package   StatusNet
+ * @author    James Walker <james@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
+ */
+
+require_once 'magicsig.php';
+
+class MagicEnvelope
+{
+    const ENCODING = 'base64url';
+
+    const NS = 'http://salmon-protocol.org/ns/magic-env';
+    
+    private function normalizeUser($user_id)
+    {
+        if (substr($user_id, 0, 5) == 'http:' ||
+            substr($user_id, 0, 6) == 'https:' ||
+            substr($user_id, 0, 5) == 'acct:') {
+            return $user_id;
+        }
+
+        if (strpos($user_id, '@') !== FALSE) {
+            return 'acct:' . $user_id;
+        }
+
+        return 'http://' . $user_id;
+    }
+
+    public function getKeyPair($signer_uri)
+    {
+        return 'RSA.79_L2gq-TD72Nsb5yGS0r9stLLpJZF5AHXyxzWmQmlqKl276LEJEs8CppcerLcR90MbYQUwt-SX9slx40Yq3vA==.AQAB.AR-jo5KMfSISmDAT2iMs2_vNFgWRjl5rbJVvA0SpGIEWyPdCGxlPtCbTexp8-0ZEIe8a4SyjatBECH5hxgMTpw==';
+    }
+
+
+    public function signMessage($text, $mimetype, $signer_uri)
+    {
+        $signer_uri = $this->normalizeUser($signer_uri);
+
+        if (!$this->checkAuthor($text, $signer_uri)) {
+            return false;
+        }
+
+        $signature_alg = new MagicsigRsaSha256($this->getKeyPair($signer_uri));
+        $armored_text = base64_encode($text);
+
+        return array(
+            'data' => $armored_text,
+            'encoding' => MagicEnvelope::ENCODING,
+            'data_type' => $mimetype,
+            'sig' => $signature_alg->sign($armored_text),
+            'alg' => $signature_alg->getName()
+        );
+            
+            
+    }
+
+    public function unfold($env)
+    {
+        $dom = new DOMDocument();
+        $dom->loadXML(base64_decode($env['data']));
+
+        if ($dom->documentElement->tagName != 'entry') {
+            return false;
+        }
+
+        $prov = $dom->createElementNS(MagicEnvelope::NS, 'me:provenance');
+        $prov->setAttribute('xmlns:me', MagicEnvelope::NS);
+        $data = $dom->createElementNS(MagicEnvelope::NS, 'me:data', $env['data']);
+        $data->setAttribute('type', $env['data_type']);
+        $prov->appendChild($data);
+        $enc = $dom->createElementNS(MagicEnvelope::NS, 'me:encoding', $env['encoding']);
+        $prov->appendChild($enc);
+        $alg = $dom->createElementNS(MagicEnvelope::NS, 'me:alg', $env['alg']);
+        $prov->appendChild($alg);
+        $sig = $dom->createElementNS(MagicEnvelope::NS, 'me:sig', $env['sig']);
+        $prov->appendChild($sig);
+
+        $dom->documentElement->appendChild($prov);
+
+        return $dom->saveXML();
+    }
+    
+    public function getAuthor($text) {
+        $doc = new DOMDocument();
+        if (!$doc->loadXML($text)) {
+            return FALSE;
+        }
+
+        if ($doc->documentElement->tagName == 'entry') {
+            $authors = $doc->documentElement->getElementsByTagName('author');
+            foreach ($authors as $author) {
+                $uris = $author->getElementsByTagName('uri');
+                foreach ($uris as $uri) {
+                    return $this->normalizeUser($uri->nodeValue);
+                }
+            }
+        }
+    }
+    
+    public function checkAuthor($text, $signer_uri)
+    {
+        return ($this->getAuthor($text) == $signer_uri);
+    }
+    
+    public function verify($env)
+    {
+        if ($env['alg'] != 'RSA-SHA256') {
+            return false;
+        }
+
+        if ($env['encoding'] != MagicEnvelope::ENCODING) {
+            return false;
+        }
+
+        $text = base64_decode($env['data']);
+        $signer_uri = $this->getAuthor($text);
+
+        $verifier = new MagicsigRsaSha256($this->getKeyPair($signer_uri));
+
+        return $verifier->verify($env['data'], $env['sig']);
+    }
+
+    public function parse($text)
+    {
+        $dom = DOMDocument::loadXML($text);
+        return $this->fromDom($dom);
+    }
+
+    public function fromDom($dom)
+    {
+        if ($dom->documentElement->tagName == 'entry') {
+            $env_element = $dom->getElementsByTagNameNS(MagicEnvelope::NS, 'provenance')->item(0);
+        } else if ($dom->documentElement->tagName == 'me:env') {
+            $env_element = $dom->documentElement;
+        } else {
+            return false;
+        }
+
+        $data_element = $env_element->getElementsByTagNameNS(MagicEnvelope::NS, 'data')->item(0);
+        
+        return array(
+            'data' => trim($data_element->nodeValue),
+            'data_type' => $data_element->getAttribute('type'),
+            'encoding' => $env_element->getElementsByTagNameNS(MagicEnvelope::NS, 'encoding')->item(0)->nodeValue,
+            'alg' => $env_element->getElementsByTagNameNS(MagicEnvelope::NS, 'alg')->item(0)->nodeValue,
+            'sig' => $env_element->getElementsByTagNameNS(MagicEnvelope::NS, 'sig')->item(0)->nodeValue,
+        );
+    }
+
+}
diff --git a/plugins/OStatus/lib/magicsig.php b/plugins/OStatus/lib/magicsig.php
new file mode 100644
index 0000000000..af65bad046
--- /dev/null
+++ b/plugins/OStatus/lib/magicsig.php
@@ -0,0 +1,159 @@
+<?php
+/**
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * A sample module to show best practices for StatusNet plugins
+ *
+ * PHP version 5
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @package   StatusNet
+ * @author    James Walker <james@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
+ */
+
+require_once 'Crypt/RSA.php';
+
+interface Magicsig
+{
+
+    public function sign($bytes);
+
+    public function verify($signed, $signature_b64);
+}
+
+class MagicsigRsaSha256
+{
+
+    public $keypair;
+    
+    public function __construct($init = null)
+    {
+        if (is_null($init)) {
+            $this->generate();
+        } else {
+            $this->fromString($init);
+        }
+    }
+
+
+    public function generate($key_length = 512)
+    {
+        $keypair = new Crypt_RSA_KeyPair($key_length);
+        $params['public_key'] = $keypair->getPublicKey();
+        $params['private_key'] = $keypair->getPrivateKey();
+        
+        $this->keypair = new Crypt_RSA($params);
+    }
+
+
+    public function toString($full_pair = true)
+    {
+        $public_key = $this->keypair->_public_key;
+        $private_key = $this->keypair->_private_key;
+
+        $mod = base64_url_encode($public_key->getModulus());
+        $exp = base64_url_encode($public_key->getExponent());
+        $private_exp = '';
+        if ($full_pair && $private_key->getExponent()) {
+            $private_exp = '.' . base64_url_encode($private_key->getExponent());
+        }
+
+        return 'RSA.' . $mod . '.' . $exp . $private_exp; 
+    }
+    
+    public function fromString($text)
+    {
+        // remove whitespace
+        $text = preg_replace('/\s+/', '', $text);
+
+        // parse components
+        if (!preg_match('/RSA\.([^\.]+)\.([^\.]+)(.([^\.]+))?/', $text, $matches)) {
+            return false;
+        }
+
+        
+        $mod = base64_url_decode($matches[1]);
+        $exp = base64_url_decode($matches[2]);
+        if ($matches[4]) {
+            $private_exp = base64_url_decode($matches[4]);
+        }
+
+        $params['public_key'] = new Crypt_RSA_KEY($mod, $exp, 'public');
+        if ($params['public_key']->isError()) {
+            $error = $params['public_key']->getLastError();
+            print $error->getMessage();
+            exit;
+        }
+        if ($private_exp) {
+            $params['private_key'] = new Crypt_RSA_KEY($mod, $private_exp, 'private');
+            if ($params['private_key']->isError()) {
+                $error = $params['private_key']->getLastError();
+                print $error->getMessage();
+                exit;
+            }
+        }
+
+        $this->keypair = new Crypt_RSA($params);
+    }
+
+    public function getName()
+    {
+        return 'RSA-SHA256';
+    }
+
+    public function sign($bytes)
+    {
+        $sig = $this->keypair->createSign($bytes, null, 'sha256');
+        if ($this->keypair->isError()) {
+            $error = $this->keypair->getLastError();
+            common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
+        }
+
+        return $sig;
+    }
+
+    public function verify($signed_bytes, $signature)
+    {
+        $result =  $this->keypair->validateSign($signed_bytes, $signature, null, 'sha256');
+        if ($this->keypair->isError()) {
+            $error = $this->keypair->getLastError();
+            //common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
+            print $error->getMessage();
+        }
+        return $result;
+    }
+        
+}
+
+// Define a sha256 function for hashing
+// (Crypt_RSA should really be updated to use hash() )
+function sha256($bytes)
+{
+    return hash('sha256', $bytes);
+}
+
+function base64_url_encode($input)
+{
+    return strtr(base64_encode($input), '+/', '-_');
+}
+
+function base64_url_decode($input)
+{
+    return base64_decode(strtr($input, '-_', '+/'));
+}
\ No newline at end of file

From 2f65fa646acc9a0739e779de9e472b9957c2e7eb Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Mon, 22 Feb 2010 09:05:52 -0500
Subject: [PATCH 40/97] wiring in magicsig

---
 plugins/OStatus/lib/salmon.php       | 17 ++++++++++++++---
 plugins/OStatus/lib/salmonaction.php |  8 +++++++-
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/plugins/OStatus/lib/salmon.php b/plugins/OStatus/lib/salmon.php
index df17a70068..53925dc3f4 100644
--- a/plugins/OStatus/lib/salmon.php
+++ b/plugins/OStatus/lib/salmon.php
@@ -34,6 +34,8 @@ class Salmon
             return FALSE;
         }
 
+        $xml = $this->createMagicEnv($xml);
+        
         $headers = array('Content-type: application/atom+xml');
 
         try {
@@ -52,16 +54,25 @@ class Salmon
 
     }
 
-    public function createMagicEnv($text, $userid)
+    public function createMagicEnv($text)
     {
+        $magic_env = new MagicEnvelope();
 
+        // TODO: Should probably be getting the signer uri as an argument?
+        $signer_uri = $magic_env->getAuthor($text);
 
+        $env = $magic_env->signMessage($text, 'application/atom+xml', $signer_uri);
+
+        return $magic_env->unfold($env);
     }
 
 
-    public function verifyMagicEnv($env)
+    public function verifyMagicEnv($dom)
     {
+        $magic_env = new MagicEnvelope();
+        
+        $env = $magic_env->fromDom($dom);
 
-
+        return $magic_env->verify($env);
     }
 }
diff --git a/plugins/OStatus/lib/salmonaction.php b/plugins/OStatus/lib/salmonaction.php
index 4aba20cc40..09a042975d 100644
--- a/plugins/OStatus/lib/salmonaction.php
+++ b/plugins/OStatus/lib/salmonaction.php
@@ -54,8 +54,14 @@ class SalmonAction extends Action
             common_log(LOG_DEBUG, "Got invalid Salmon post: $xml");
             $this->clientError(_m('Salmon post must be an Atom entry.'));
         }
-        // XXX: check the signature
 
+        // Check the signature
+        $salmon = new Salmon;
+        if (!$salmon->verifyMagicEnv($dom)) {
+            common_log(LOG_DEBUG, "Salmon signature verification failed.");
+            $this->clientError(_m('Salmon signature verification failed.'));
+        }
+            
         $this->act = new Activity($dom->documentElement);
         return true;
     }

From 8ccc9e2c386824c71aca2da7ae311d2787338483 Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Mon, 22 Feb 2010 17:03:28 +0100
Subject: [PATCH 41/97] Added before and after event hooks for subscriptions
 content

---
 EVENTS.txt                |  6 +++++
 actions/subscriptions.php | 47 ++++++++++++++++++++++-----------------
 2 files changed, 32 insertions(+), 21 deletions(-)

diff --git a/EVENTS.txt b/EVENTS.txt
index d3c2fb7bf6..c387274c03 100644
--- a/EVENTS.txt
+++ b/EVENTS.txt
@@ -763,3 +763,9 @@ EndFindMentions: end finding mentions in a block of text
   has 'mentioned' (array of mentioned profiles), 'url' (url to link as),
   'title' (title of the link), 'position' (position of the text to
   replace), 'text' (text to replace)
+
+StartShowSubscriptionsContent: before showing the subscriptions content
+- $action: the current action
+
+EndShowSubscriptionsContent: after showing the subscriptions content
+- $action: the current action
diff --git a/actions/subscriptions.php b/actions/subscriptions.php
index 0ef31aa9f1..ba6171ef4c 100644
--- a/actions/subscriptions.php
+++ b/actions/subscriptions.php
@@ -79,32 +79,37 @@ class SubscriptionsAction extends GalleryAction
 
     function showContent()
     {
-        parent::showContent();
+        if (Event::handle('StartShowSubscriptionsContent', array($this))) {
+            parent::showContent();
 
-        $offset = ($this->page-1) * PROFILES_PER_PAGE;
-        $limit =  PROFILES_PER_PAGE + 1;
+            $offset = ($this->page-1) * PROFILES_PER_PAGE;
+            $limit =  PROFILES_PER_PAGE + 1;
 
-        $cnt = 0;
+            $cnt = 0;
 
-        if ($this->tag) {
-            $subscriptions = $this->user->getTaggedSubscriptions($this->tag, $offset, $limit);
-        } else {
-            $subscriptions = $this->user->getSubscriptions($offset, $limit);
-        }
-
-        if ($subscriptions) {
-            $subscriptions_list = new SubscriptionsList($subscriptions, $this->user, $this);
-            $cnt = $subscriptions_list->show();
-            if (0 == $cnt) {
-                $this->showEmptyListMessage();
+            if ($this->tag) {
+                $subscriptions = $this->user->getTaggedSubscriptions($this->tag, $offset, $limit);
+            } else {
+                $subscriptions = $this->user->getSubscriptions($offset, $limit);
             }
+
+            if ($subscriptions) {
+                $subscriptions_list = new SubscriptionsList($subscriptions, $this->user, $this);
+                $cnt = $subscriptions_list->show();
+                if (0 == $cnt) {
+                    $this->showEmptyListMessage();
+                }
+            }
+
+            $subscriptions->free();
+
+            $this->pagination($this->page > 1, $cnt > PROFILES_PER_PAGE,
+                              $this->page, 'subscriptions',
+                              array('nickname' => $this->user->nickname));
+
+
+            Event::handle('EndShowSubscriptionsContent', array($this));
         }
-
-        $subscriptions->free();
-
-        $this->pagination($this->page > 1, $cnt > PROFILES_PER_PAGE,
-                          $this->page, 'subscriptions',
-                          array('nickname' => $this->user->nickname));
     }
 
     function showScripts()

From 5a6967db6cbe0e864c8d542700008bba99a7b095 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Mon, 22 Feb 2010 11:03:56 -0500
Subject: [PATCH 42/97] clear the site owner when profile changes

---
 actions/profilesettings.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/actions/profilesettings.php b/actions/profilesettings.php
index 0d67778791..161e35b111 100644
--- a/actions/profilesettings.php
+++ b/actions/profilesettings.php
@@ -285,6 +285,10 @@ class ProfilesettingsAction extends AccountSettingsAction
                 } else {
                     // Re-initialize language environment if it changed
                     common_init_language();
+                    // Clear the site owner, in case nickname changed
+                    if ($user->hasRole(Profile_role::OWNER)) {
+                        User::blow('user:site_owner');
+                    }
                 }
             }
 

From e6ce04cbce08b9f7d0d74f6fbf86e199af8b865d Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Mon, 22 Feb 2010 17:05:43 +0100
Subject: [PATCH 43/97] Generalised Subscription XHR dialogbox

---
 plugins/OStatus/js/ostatus.js | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/plugins/OStatus/js/ostatus.js b/plugins/OStatus/js/ostatus.js
index 6717955582..4b4c329102 100644
--- a/plugins/OStatus/js/ostatus.js
+++ b/plugins/OStatus/js/ostatus.js
@@ -1,14 +1,15 @@
 SN.U.DialogBox = {
     Subscribe: function(a) {
-        var f = a.parent().find('#form_ostatus_connect');
+        var f = a.parent().find('.form_settings');
         if (f.length > 0) {
             f.show();
         }
         else {
+            a[0].href = (a[0].href.match(/[\\?]/) == null) ? a[0].href+'?' : a[0].href+'&';
             $.ajax({
                 type: 'GET',
                 dataType: 'xml',
-                url: a[0].href+'&ajax=1',
+                url: a[0].href+'ajax=1',
                 beforeSend: function(formData) {
                     a.addClass('processing');
                 },
@@ -19,7 +20,7 @@ SN.U.DialogBox = {
                     if (typeof($('form', data)[0]) != 'undefined') {
                         a.after(document._importNode($('form', data)[0], true));
 
-                        var form = a.parent().find('#form_ostatus_connect');
+                        var form = a.parent().find('.form_settings');
 
                         form
                             .addClass('dialogbox')
@@ -40,6 +41,7 @@ SN.U.DialogBox = {
                         });
 
                         form.find('#acct').focus();
+                        form.find('#profile').focus();
                     }
 
                     a.removeClass('processing');
@@ -50,11 +52,9 @@ SN.U.DialogBox = {
 };
 
 SN.Init.Subscribe = function() {
-    $('.entity_subscribe a').live('click', function() { SN.U.DialogBox.Subscribe($(this)); return false; });
+    $('.entity_subscribe .entity_remote_subscribe').live('click', function() { SN.U.DialogBox.Subscribe($(this)); return false; });
 };
 
 $(document).ready(function() {
-    if ($('.entity_subscribe .entity_remote_subscribe').length > 0) {
-        SN.Init.Subscribe();
-    }
+    SN.Init.Subscribe();
 });

From 3569493ba7e77a1a9f19bdbbf3f2d5f262ea8484 Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Mon, 22 Feb 2010 17:07:48 +0100
Subject: [PATCH 44/97] Added link to Subscriptions page to XHR get the ostatus
 sub form

---
 plugins/OStatus/OStatusPlugin.php          | 17 ++++++++++++
 plugins/OStatus/actions/ostatussub.php     | 19 +++++++++++---
 plugins/OStatus/theme/base/css/ostatus.css | 30 +++++++++++++++++-----
 3 files changed, 57 insertions(+), 9 deletions(-)

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 3ac2bb87d7..0b0317316c 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -497,4 +497,21 @@ class OStatusPlugin extends Plugin
         }
         return true;
     }
+
+    function onStartShowSubscriptionsContent($action)
+    {
+        $user = common_current_user();
+        if ($user && ($user->id == $action->profile->id)) {
+            $action->elementStart('div', 'entity_actions');
+            $action->elementStart('p', array('id' => 'entity_remote_subscribe',
+                                             'class' => 'entity_subscribe'));
+            $action->element('a', array('href' => common_local_url('ostatussub'),
+                                        'class' => 'entity_remote_subscribe')
+                                , _m('Subscribe to remote user'));
+            $action->elementEnd('p');
+            $action->elementEnd('div');
+        }
+
+        return true;
+    }
 }
diff --git a/plugins/OStatus/actions/ostatussub.php b/plugins/OStatus/actions/ostatussub.php
index 8cb8e2ae7c..95dec19afc 100644
--- a/plugins/OStatus/actions/ostatussub.php
+++ b/plugins/OStatus/actions/ostatussub.php
@@ -55,7 +55,20 @@ class OStatusSubAction extends Action
     function showForm($error=null)
     {
         $this->error = $error;
-        $this->showPage();
+        if ($this->boolean('ajax')) {
+            header('Content-Type: text/xml;charset=utf-8');
+            $this->xw->startDocument('1.0', 'UTF-8');
+            $this->elementStart('html');
+            $this->elementStart('head');
+            $this->element('title', null, _m('Subscribe to user'));
+            $this->elementEnd('head');
+            $this->elementStart('body');
+            $this->showContent();
+            $this->elementEnd('body');
+            $this->elementEnd('html');
+        } else {
+            $this->showPage();
+        }
     }
 
     function showPageNotice()
@@ -81,7 +94,7 @@ class OStatusSubAction extends Action
         $profile = $user->getProfile();
 
         $this->elementStart('form', array('method' => 'post',
-                                          'id' => 'ostatus_sub',
+                                          'id' => 'form_ostatus_sub',
                                           'class' => 'form_settings',
                                           'action' =>
                                           common_local_url('ostatussub')));
@@ -141,7 +154,7 @@ class OStatusSubAction extends Action
             if ($this->profile_uri) {
                 $this->validateAndPreview();
             } else {
-                $this->showPage();
+                $this->showForm();
             }
         }
     }
diff --git a/plugins/OStatus/theme/base/css/ostatus.css b/plugins/OStatus/theme/base/css/ostatus.css
index 9bc90a7315..feeeb47d38 100644
--- a/plugins/OStatus/theme/base/css/ostatus.css
+++ b/plugins/OStatus/theme/base/css/ostatus.css
@@ -7,24 +7,42 @@
  * @link      http://status.net/
  */
 
-#form_ostatus_connect.dialogbox {
+#form_ostatus_connect.dialogbox,
+#form_ostatus_sub.dialogbox {
 width:70%;
 background-image:none;
 }
-#form_ostatus_connect.dialogbox .form_data label {
+#form_ostatus_sub.dialogbox {
+width:65%;
+}
+#form_ostatus_connect.dialogbox .form_data label,
+#form_ostatus_sub.dialogbox .form_data label {
 width:34%;
 }
-#form_ostatus_connect.dialogbox .form_data input {
+#form_ostatus_connect.dialogbox .form_data input,
+#form_ostatus_sub.dialogbox .form_data input {
 width:57%;
 }
-#form_ostatus_connect.dialogbox .form_data .form_guide {
+#form_ostatus_connect.dialogbox .form_data .form_guide,
+#form_ostatus_sub.dialogbox .form_data .form_guide {
 margin-left:36%;
 }
 
-#form_ostatus_connect.dialogbox #ostatus_nickname {
+#form_ostatus_connect.dialogbox #ostatus_nickname,
+#form_ostatus_sub.dialogbox #ostatus_nickname {
 display:none;
 }
 
-#form_ostatus_connect.dialogbox .submit_dialogbox  {
+#form_ostatus_connect.dialogbox .submit_dialogbox,
+#form_ostatus_sub.dialogbox .submit_dialogbox {
 min-width:96px;
 }
+
+#subscriptions #entity_remote_subscribe {
+padding:0;
+float:right;
+}
+
+#subscriptions .entity_remote_subscribe {
+float:right;
+}

From 2b16532ffb77d683d32ca6a399b80949d7e6b1e4 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Mon, 22 Feb 2010 10:03:34 -0800
Subject: [PATCH 45/97] OStatus: use 'profile' consistently as param on
 ostatussub and ostatusinit to help us stay sane.

---
 plugins/OStatus/actions/ostatusinit.php | 28 +++++++++++++++----------
 plugins/OStatus/js/ostatus.js           |  1 -
 2 files changed, 17 insertions(+), 12 deletions(-)

diff --git a/plugins/OStatus/actions/ostatusinit.php b/plugins/OStatus/actions/ostatusinit.php
index abd8cb5419..3f2f6368f6 100644
--- a/plugins/OStatus/actions/ostatusinit.php
+++ b/plugins/OStatus/actions/ostatusinit.php
@@ -29,7 +29,7 @@ class OStatusInitAction extends Action
 {
 
     var $nickname;
-    var $acct;
+    var $profile;
     var $err;
 
     function prepare($args)
@@ -41,8 +41,11 @@ class OStatusInitAction extends Action
             return false;
         }
 
-        $this->nickname    = $this->trimmed('nickname');
-        $this->acct = $this->trimmed('acct');
+        // Local user the remote wants to subscribe to
+        $this->nickname = $this->trimmed('nickname');
+        
+        // Webfinger or profile URL of the remote user
+        $this->profile = $this->trimmed('profile');
 
         return true;
     }
@@ -100,7 +103,7 @@ class OStatusInitAction extends Action
                      _m('Nickname of the user you want to follow'));
         $this->elementEnd('li');
         $this->elementStart('li', array('id' => 'ostatus_profile'));
-        $this->input('acct', _m('Profile Account'), $this->acct,
+        $this->input('profile', _m('Profile Account'), $this->profile,
                      _m('Your account id (i.e. user@identi.ca)'));
         $this->elementEnd('li');
         $this->elementEnd('ul');
@@ -112,15 +115,17 @@ class OStatusInitAction extends Action
     function ostatusConnect()
     {
         $opts = array('allowed_schemes' => array('http', 'https', 'acct'));
-        if (Validate::uri($this->acct, $opts)) {
-            $bits = parse_url($this->acct);
+        if (Validate::uri($this->profile, $opts)) {
+            $bits = parse_url($this->profile);
             if ($bits['scheme'] == 'acct') {
                 $this->connectWebfinger($bits['path']);
             } else {
-                $this->connectProfile($this->acct);
+                $this->connectProfile($this->profile);
             }
-        } elseif (strpos($this->acct, '@') !== false) {
-            $this->connectWebfinger($this->acct);
+        } elseif (strpos($this->profile, '@') !== false) {
+            $this->connectWebfinger($this->profile);
+        } else {
+            $this->clientError(_m("Must provide a remote profile."));
         }
     }
 
@@ -140,12 +145,12 @@ class OStatusInitAction extends Action
                 $target_profile = common_local_url('userbyid', array('id' => $user->id));
 
                 $url = $w->applyTemplate($link['template'], $target_profile);
-
+                common_log(LOG_INFO, "Sending remote subscriber $acct to $url");
                 common_redirect($url, 303);
             }
 
         }
-
+        $this->clientError(_m("Couldn't confirm remote profile address."));
     }
 
     function connectProfile($subscriber_profile)
@@ -157,6 +162,7 @@ class OStatusInitAction extends Action
         $suburl = preg_replace('!^(.*)/(.*?)$!', '$1/main/ostatussub', $subscriber_profile);
         $suburl .= '?profile=' . urlencode($target_profile);
 
+        common_log(LOG_INFO, "Sending remote subscriber $subscriber_profile to $suburl");
         common_redirect($suburl, 303);
     }
 
diff --git a/plugins/OStatus/js/ostatus.js b/plugins/OStatus/js/ostatus.js
index 4b4c329102..0daeb1a8b0 100644
--- a/plugins/OStatus/js/ostatus.js
+++ b/plugins/OStatus/js/ostatus.js
@@ -40,7 +40,6 @@ SN.U.DialogBox = {
                             return false;
                         });
 
-                        form.find('#acct').focus();
                         form.find('#profile').focus();
                     }
 

From 85cb850cd5fe4b2edd61a86c6020f246f71e8306 Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Mon, 22 Feb 2010 19:13:30 +0100
Subject: [PATCH 46/97] Set and reuse a cookie with own profile value at a
 StatusNet instance

---
 plugins/OStatus/js/ostatus.js | 45 ++++++++++++++++++++++++++++++++++-
 1 file changed, 44 insertions(+), 1 deletion(-)

diff --git a/plugins/OStatus/js/ostatus.js b/plugins/OStatus/js/ostatus.js
index 0daeb1a8b0..dc1925cb93 100644
--- a/plugins/OStatus/js/ostatus.js
+++ b/plugins/OStatus/js/ostatus.js
@@ -1,3 +1,36 @@
+SN.C.S.StatusNetInstance = 'StatusNetInstance';
+
+SN.U.StatusNetInstance = {
+    Set: function(value) {
+        $.cookie(
+            SN.C.S.StatusNetInstance,
+            JSON.stringify(value),
+            {
+                path: '/',
+                expires: SN.U.GetFullYear(2029, 0, 1)
+            });
+    },
+
+    Get: function() {
+        var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
+        if (cookieValue !== null) {
+            return JSON.parse(cookieValue);
+        }
+        return null;
+    },
+
+    Delete: function() {
+        $.cookie(SN.C.S.StatusNetInstance, null);
+    }
+};
+
+SN.Init.OStatusCookie = function() {
+    if (SN.U.StatusNetInstance.Get() === null) {
+        SN.C.I.OStatusProfile = SN.C.I.OStatusProfile || null;
+        SN.U.StatusNetInstance.Set({profile: SN.C.I.OStatusProfile});
+    }
+};
+
 SN.U.DialogBox = {
     Subscribe: function(a) {
         var f = a.parent().find('.form_settings');
@@ -41,13 +74,23 @@ SN.U.DialogBox = {
                         });
 
                         form.find('#profile').focus();
+
+                        if (form.attr('id') == 'form_ostatus_connect') {
+                            SN.Init.OStatusCookie();
+                            form.find('#profile').val(SN.U.StatusNetInstance.Get().profile)
+
+                            form.find("[type=submit]").bind('click', function() {
+                                SN.U.StatusNetInstance.Set({profile: form.find('#profile').val()});
+                                return true;
+                            });
+                        }
                     }
 
                     a.removeClass('processing');
                 }
             });
         }
-    }
+    },
 };
 
 SN.Init.Subscribe = function() {

From 3ed379613598645f75a402baa2c4abcf78984639 Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Mon, 22 Feb 2010 19:18:32 +0100
Subject: [PATCH 47/97] Added licensing info and a note about migrating

---
 plugins/OStatus/js/ostatus.js | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/plugins/OStatus/js/ostatus.js b/plugins/OStatus/js/ostatus.js
index dc1925cb93..5521583de2 100644
--- a/plugins/OStatus/js/ostatus.js
+++ b/plugins/OStatus/js/ostatus.js
@@ -1,3 +1,29 @@
+/*
+ * StatusNet - a distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  OStatus UI interaction
+ * @package   StatusNet
+ * @author    Sarven Capadisli <csarven@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://status.net/
+ * @note      Everything in here should eventually migrate over to /js/util.js's SN.
+ */
+
 SN.C.S.StatusNetInstance = 'StatusNetInstance';
 
 SN.U.StatusNetInstance = {

From a1549ebf87b7c1629c23704b1ec733c1e7c2a57d Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Mon, 22 Feb 2010 19:36:03 +0100
Subject: [PATCH 48/97] Minor JSLinting

---
 plugins/OStatus/js/ostatus.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/plugins/OStatus/js/ostatus.js b/plugins/OStatus/js/ostatus.js
index 5521583de2..473f1540a4 100644
--- a/plugins/OStatus/js/ostatus.js
+++ b/plugins/OStatus/js/ostatus.js
@@ -64,7 +64,7 @@ SN.U.DialogBox = {
             f.show();
         }
         else {
-            a[0].href = (a[0].href.match(/[\\?]/) == null) ? a[0].href+'?' : a[0].href+'&';
+            a[0].href = (a[0].href.match(/[\\?]/) === null) ? a[0].href+'?' : a[0].href+'&';
             $.ajax({
                 type: 'GET',
                 dataType: 'xml',
@@ -103,7 +103,7 @@ SN.U.DialogBox = {
 
                         if (form.attr('id') == 'form_ostatus_connect') {
                             SN.Init.OStatusCookie();
-                            form.find('#profile').val(SN.U.StatusNetInstance.Get().profile)
+                            form.find('#profile').val(SN.U.StatusNetInstance.Get().profile);
 
                             form.find("[type=submit]").bind('click', function() {
                                 SN.U.StatusNetInstance.Set({profile: form.find('#profile').val()});

From 7e8c3ea418796152151a5780e52dd095ca4e114b Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Mon, 22 Feb 2010 19:37:42 +0100
Subject: [PATCH 49/97] Removed extra comma

---
 plugins/OStatus/js/ostatus.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/OStatus/js/ostatus.js b/plugins/OStatus/js/ostatus.js
index 473f1540a4..8ba424a530 100644
--- a/plugins/OStatus/js/ostatus.js
+++ b/plugins/OStatus/js/ostatus.js
@@ -116,7 +116,7 @@ SN.U.DialogBox = {
                 }
             });
         }
-    },
+    }
 };
 
 SN.Init.Subscribe = function() {

From 06f155c02df91ae81eb4401c738815ee46b802a6 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Mon, 22 Feb 2010 09:43:27 -0800
Subject: [PATCH 50/97] OStatus: initial hookup of remote group membership
 (notice delivery not yet working quite right) - added a temp config var to
 disable salmon magic signatures until they're working consistently

---
 plugins/OStatus/OStatusPlugin.php           |  93 ++++++++++-
 plugins/OStatus/actions/groupsalmon.php     |  77 ++++++++-
 plugins/OStatus/actions/ostatussub.php      |   2 +-
 plugins/OStatus/classes/Ostatus_profile.php | 169 +++++++++++++++-----
 plugins/OStatus/lib/activity.php            |   6 +
 plugins/OStatus/lib/salmon.php              |  21 ++-
 plugins/OStatus/lib/salmonaction.php        |  23 ++-
 7 files changed, 336 insertions(+), 55 deletions(-)

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 7c6c0c69f3..061ed4bd1b 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -211,7 +211,7 @@ class OStatusPlugin extends Plugin
 
                 // FIXME: this needs to go out in a queue handler
 
-                $xml = '<?xml version="1.0" encoding="UTF-8" ?>';
+                $xml = '<?xml version="1.0" encoding="UTF-8" ?' . '>';
                 $xml .= $notice->asAtomEntry(true, true);
 
                 $salmon = new Salmon();
@@ -402,6 +402,97 @@ class OStatusPlugin extends Plugin
         return true;
     }
 
+    /**
+     * When one of our local users tries to join a remote group,
+     * notify the remote server. If the notification is rejected,
+     * deny the join.
+     *
+     * @param User_group $group
+     * @param User $user
+     *
+     * @return mixed hook return value
+     */
+
+    function onStartJoinGroup($group, $user)
+    {
+        $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
+        if ($oprofile) {
+            $member = Profile::staticGet($user->id);
+
+            $act = new Activity();
+            $act->id = TagURI::mint('join:%d:%d:%s',
+                                    $member->id,
+                                    $group->id,
+                                    common_date_iso8601(time()));
+
+            $act->actor = ActivityObject::fromProfile($member);
+            $act->verb = ActivityVerb::JOIN;
+            $act->object = $oprofile->asActivityObject();
+
+            $act->time = time();
+            $act->title = _m("Join");
+            $act->content = sprintf(_m("%s has joined group %s."),
+                                    $member->getBestName(),
+                                    $oprofile->getBestName());
+
+            if ($oprofile->notifyActivity($act)) {
+                return true;
+            } else {
+                throw new ServerException(_m("Failed joining remote group."));
+            }
+        }
+    }
+
+    /**
+     * When one of our local users leaves a remote group, notify the remote
+     * server.
+     *
+     * @fixme Might be good to schedule a resend of the leave notification
+     * if it failed due to a transitory error. We've canceled the local
+     * membership already anyway, but if the remote server comes back up
+     * it'll be left with a stray membership record.
+     *
+     * @param User_group $group
+     * @param User $user
+     *
+     * @return mixed hook return value
+     */
+
+    function onEndLeaveGroup($group, $user)
+    {
+        $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
+        if ($oprofile) {
+            // Drop the PuSH subscription if there are no other subscribers.
+    
+            $members = $group->getMembers(0, 1);
+            if ($members->N == 0) {
+                common_log(LOG_INFO, "Unsubscribing from now-unused group feed $oprofile->feeduri");
+                $oprofile->unsubscribe();
+            }
+
+
+            $member = Profile::staticGet($user->id);
+
+            $act = new Activity();
+            $act->id = TagURI::mint('leave:%d:%d:%s',
+                                    $member->id,
+                                    $group->id,
+                                    common_date_iso8601(time()));
+
+            $act->actor = ActivityObject::fromProfile($member);
+            $act->verb = ActivityVerb::LEAVE;
+            $act->object = $oprofile->asActivityObject();
+
+            $act->time = time();
+            $act->title = _m("Leave");
+            $act->content = sprintf(_m("%s has left group %s."),
+                                    $member->getBestName(),
+                                    $oprofile->getBestName());
+
+            $oprofile->notifyActivity($act);
+        }
+    }
+
     /**
      * Notify remote users when their notices get favorited.
      *
diff --git a/plugins/OStatus/actions/groupsalmon.php b/plugins/OStatus/actions/groupsalmon.php
index 64ae9f3cc0..2e4fe94436 100644
--- a/plugins/OStatus/actions/groupsalmon.php
+++ b/plugins/OStatus/actions/groupsalmon.php
@@ -88,21 +88,96 @@ class GroupsalmonAction extends SalmonAction
      * Save a subscription relationship for them.
      */
 
+    /**
+     * Postel's law: consider a "follow" notification as a "join".
+     */
     function handleFollow()
     {
-        $this->handleJoin(); // ???
+        $this->handleJoin();
     }
 
+    /**
+     * Postel's law: consider an "unfollow" notification as a "leave".
+     */
     function handleUnfollow()
     {
+        $this->handleLeave();
     }
 
     /**
      * A remote user joined our group.
+     * @fixme move permission checks and event call into common code,
+     *        currently we're doing the main logic in joingroup action
+     *        and so have to repeat it here.
      */
 
     function handleJoin()
     {
+        $oprofile = $this->ensureProfile();
+        if (!$oprofile) {
+            $this->clientError(_m("Can't read profile to set up group membership."));
+        }
+        if ($oprofile->isGroup()) {
+            $this->clientError(_m("Groups can't join groups."));
+        }
+
+        common_log(LOG_INFO, "Remote profile {$oprofile->uri} joining local group {$this->group->nickname}");
+        $profile = $oprofile->localProfile();
+
+        if ($profile->isMember($this->group)) {
+            // Already a member; we'll take it silently to aid in resolving
+            // inconsistencies on the other side.
+            return true;
+        }
+
+        if (Group_block::isBlocked($this->group, $profile)) {
+            $this->clientError(_('You have been blocked from that group by the admin.'), 403);
+            return false;
+        }
+
+        try {
+            // @fixme that event currently passes a user from main UI
+            // Event should probably move into Group_member::join
+            // and take a Profile object.
+            //
+            //if (Event::handle('StartJoinGroup', array($this->group, $profile))) {
+                Group_member::join($this->group->id, $profile->id);
+                //Event::handle('EndJoinGroup', array($this->group, $profile));
+            //}
+        } catch (Exception $e) {
+            $this->serverError(sprintf(_m('Could not join remote user %1$s to group %2$s.'),
+                                       $oprofile->uri, $this->group->nickname));
+        }
+    }
+
+    /**
+     * A remote user left our group.
+     */
+
+    function handleLeave()
+    {
+        $oprofile = $this->ensureProfile();
+        if (!$oprofile) {
+            $this->clientError(_m("Can't read profile to cancel group membership."));
+        }
+        if ($oprofile->isGroup()) {
+            $this->clientError(_m("Groups can't join groups."));
+        }
+
+        common_log(LOG_INFO, "Remote profile {$oprofile->uri} leaving local group {$this->group->nickname}");
+        $profile = $oprofile->localProfile();
+
+        try {
+            // @fixme event needs to be refactored as above
+            //if (Event::handle('StartLeaveGroup', array($this->group, $profile))) {
+                Group_member::leave($this->group->id, $profile->id);
+                //Event::handle('EndLeaveGroup', array($this->group, $profile));
+            //}
+        } catch (Exception $e) {
+            $this->serverError(sprintf(_m('Could not remove remote user %1$s from group %2$s.'),
+                                       $oprofile->uri, $this->group->nickname));
+            return;
+        }
     }
 
 }
diff --git a/plugins/OStatus/actions/ostatussub.php b/plugins/OStatus/actions/ostatussub.php
index 95dec19afc..592ae387ea 100644
--- a/plugins/OStatus/actions/ostatussub.php
+++ b/plugins/OStatus/actions/ostatussub.php
@@ -248,7 +248,7 @@ class OStatusSubAction extends Action
                 $group = $this->oprofile->localGroup();
                 if ($user->isMember($group)) {
                     $this->showForm(_m('Already a member!'));
-                } elseif (Group_member::join($this->profile->group_id, $user->id)) {
+                } elseif (Group_member::join($this->oprofile->group_id, $user->id)) {
                     $this->showForm(_m('Joined remote group!'));
                 } else {
                     $this->showForm(_m('Remote group join failed!'));
diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 0e12f8fc6e..c0e39add8f 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -137,12 +137,49 @@ class Ostatus_profile extends Memcached_DataObject
         return null;
     }
 
+    /**
+     * Returns an ActivityObject describing this remote user or group profile.
+     * Can then be used to generate Atom chunks.
+     *
+     * @return ActivityObject
+     */
+    function asActivityObject()
+    {
+        if ($this->isGroup()) {
+            $object = new ActivityObject();
+            $object->type = 'http://activitystrea.ms/schema/1.0/group';
+            $object->id = $this->uri;
+            $self = $this->localGroup();
+
+            // @fixme put a standard getAvatar() interface on groups too
+            if ($self->homepage_logo) {
+                $object->avatar = $self->homepage_logo;
+                $map = array('png' => 'image/png',
+                             'jpg' => 'image/jpeg',
+                             'jpeg' => 'image/jpeg',
+                             'gif' => 'image/gif');
+                $extension = pathinfo(parse_url($avatarHref, PHP_URL_PATH), PATHINFO_EXTENSION);
+                if (isset($map[$extension])) {
+                    // @fixme this ain't used/saved yet
+                    $object->avatarType = $map[$extension];
+                }
+            }
+
+            $object->link = $this->uri; // @fixme accurate?
+            return $object;
+        } else {
+            return ActivityObject::fromProfile($this->localProfile());
+        }
+    }
+
     /**
      * Returns an XML string fragment with profile information as an
      * Activity Streams noun object with the given element type.
      *
      * Assumes that 'activity' namespace has been previously defined.
      *
+     * @fixme replace with wrappers on asActivityObject when it's got everything.
+     *
      * @param string $element one of 'actor', 'subject', 'object', 'target'
      * @return string
      */
@@ -202,11 +239,19 @@ class Ostatus_profile extends Memcached_DataObject
     }
 
     /**
-     * Damn dirty hack!
+     * @return boolean true if this is a remote group
      */
     function isGroup()
     {
-        return (strpos($this->feeduri, '/groups/') !== false);
+        if ($this->profile_id && !$this->group_id) {
+            return false;
+        } else if ($this->group_id && !$this->profile_id) {
+            return true;
+        } else if ($this->group_id && $this->profile_id) {
+            throw new ServerException("Invalid ostatus_profile state: both group and profile IDs set for $this->uri");
+        } else {
+            throw new ServerException("Invalid ostatus_profile state: both group and profile IDs empty for $this->uri");
+        }
     }
 
     /**
@@ -353,22 +398,24 @@ class Ostatus_profile extends Memcached_DataObject
             common_log(LOG_INFO, "Posting to Salmon endpoint $this->salmonuri: $xml");
 
             $salmon = new Salmon(); // ?
-            $salmon->post($this->salmonuri, $xml);
+            return $salmon->post($this->salmonuri, $xml);
         }
+        return false;
     }
 
     public function notifyActivity($activity)
     {
         if ($this->salmonuri) {
 
-            $xml = $activity->asString(true);
+            $xml = '<?xml version="1.0" encoding="UTF-8" ?' . '>' .
+                          $activity->asString(true);
 
             $salmon = new Salmon(); // ?
 
-            $salmon->post($this->salmonuri, $xml);
+            return $salmon->post($this->salmonuri, $xml);
         }
 
-        return;
+        return false;
     }
 
     function getBestName()
@@ -597,10 +644,23 @@ class Ostatus_profile extends Memcached_DataObject
      */
     protected function updateAvatar($url)
     {
+        if ($this->isGroup()) {
+            $self = $this->localGroup();
+        } else {
+            $self = $this->localProfile();
+        }
+        if (!$self) {
+            throw new ServerException(sprintf(
+                _m("Tried to update avatar for unsaved remote profile %s"),
+                $this->uri));
+        }
+
         // @fixme this should be better encapsulated
         // ripped from oauthstore.php (for old OMB client)
         $temp_filename = tempnam(sys_get_temp_dir(), 'listener_avatar');
-        copy($url, $temp_filename);
+        if (!copy($url, $temp_filename)) {
+            throw new ServerException(sprintf(_m("Unable to fetch avatar from %s"), $url));
+        }
 
         if ($this->isGroup()) {
             $id = $this->group_id;
@@ -614,13 +674,7 @@ class Ostatus_profile extends Memcached_DataObject
                                      null,
                                      common_timestamp());
         rename($temp_filename, Avatar::path($filename));
-        if ($this->isGroup()) {
-            $group = $this->localGroup();
-            $group->setOriginal($filename);
-        } else {
-            $profile = $this->localProfile();
-            $profile->setOriginal($filename);
-        }
+        $self->setOriginal($filename);
     }
 
     protected static function getActivityObjectAvatar($object)
@@ -747,6 +801,18 @@ class Ostatus_profile extends Memcached_DataObject
         self::createActivityObjectProfile($actor, $feeduri, $salmonuri);
     }
 
+    /**
+     * Create local ostatus_profile and profile/user_group entries for
+     * the provided remote user or group.
+     *
+     * @param ActivityObject $object
+     * @param string $feeduri
+     * @param string $salmonuri
+     * @param array $hints
+     *
+     * @fixme fold $feeduri/$salmonuri into $hints
+     * @return Ostatus_profile
+     */
     protected static function createActivityObjectProfile($object, $feeduri=null, $salmonuri=null, $hints=array())
     {
         $homeuri  = $object->id;
@@ -784,46 +850,65 @@ class Ostatus_profile extends Memcached_DataObject
             }
         }
 
-        $profile = new Profile();
-        $profile->nickname   = $nickname;
-        $profile->fullname   = $object->title;
-        if (!empty($object->link)) {
-            $profile->profileurl = $object->link;
-        } else if (array_key_exists('profileurl', $hints)) {
-            $profile->profileurl = $hints['profileurl'];
-        }
-        $profile->created    = common_sql_now();
-
-        // @fixme bio
-        // @fixme tags/categories
-        // @fixme location?
-        // @todo tags from categories
-        // @todo lat/lon/location?
-
-        $profile_id = $profile->insert();
-
-        if (!$profile_id) {
-            throw new ServerException("Can't save local profile");
-        }
-
-        // @fixme either need to do feed discovery here
-        // or need to split out some of the feed stuff
-        // so we can leave it empty until later.
-
         $oprofile = new Ostatus_profile();
 
         $oprofile->uri        = $homeuri;
         $oprofile->feeduri    = $feeduri;
         $oprofile->salmonuri  = $salmonuri;
-        $oprofile->profile_id = $profile_id;
 
         $oprofile->created    = common_sql_now();
         $oprofile->modified   = common_sql_now();
 
+        if ($object->type == ActivityObject::PERSON) {
+            $profile = new Profile();
+            $profile->nickname   = $nickname;
+            $profile->fullname   = $object->title;
+            if (!empty($object->link)) {
+                $profile->profileurl = $object->link;
+            } else if (array_key_exists('profileurl', $hints)) {
+                $profile->profileurl = $hints['profileurl'];
+            }
+            $profile->created    = common_sql_now();
+    
+            // @fixme bio
+            // @fixme tags/categories
+            // @fixme location?
+            // @todo tags from categories
+            // @todo lat/lon/location?
+    
+            $oprofile->profile_id = $profile->insert();
+    
+            if (!$oprofile->profile_id) {
+                throw new ServerException("Can't save local profile");
+            }
+        } else {
+            $group = new User_group();
+            $group->nickname = $nickname;
+            $group->fullname = $object->title;
+            // @fixme no canonical profileurl; using homepage instead for now
+            $group->homepage = $homeuri;
+            $group->created = common_sql_now();
+
+            // @fixme homepage
+            // @fixme bio
+            // @fixme tags/categories
+            // @fixme location?
+            // @todo tags from categories
+            // @todo lat/lon/location?
+
+            $oprofile->group_id = $group->insert();
+
+            if (!$oprofile->group_id) {
+                throw new ServerException("Can't save local profile");
+            }
+        }
+
         $ok = $oprofile->insert();
 
         if ($ok) {
-            $oprofile->updateAvatar($avatar);
+            if ($avatar) {
+                $oprofile->updateAvatar($avatar);
+            }
             return $oprofile;
         } else {
             throw new ServerException("Can't save OStatus profile");
diff --git a/plugins/OStatus/lib/activity.php b/plugins/OStatus/lib/activity.php
index a26248f199..6cb9881bf6 100644
--- a/plugins/OStatus/lib/activity.php
+++ b/plugins/OStatus/lib/activity.php
@@ -367,6 +367,9 @@ class ActivityObject
         return $object;
     }
 
+    /**
+     * @fixme missing avatar, bio info, etc
+     */
     static function fromProfile($profile)
     {
         $object = new ActivityObject();
@@ -379,6 +382,9 @@ class ActivityObject
         return $object;
     }
 
+    /**
+     * @fixme missing avatar, bio info, etc
+     */
     function asString($tag='activity:object')
     {
         $xs = new XMLStringer(true);
diff --git a/plugins/OStatus/lib/salmon.php b/plugins/OStatus/lib/salmon.php
index 53925dc3f4..b5f178cc6a 100644
--- a/plugins/OStatus/lib/salmon.php
+++ b/plugins/OStatus/lib/salmon.php
@@ -28,15 +28,26 @@
  */
 class Salmon
 {
+    /**
+     * Sign and post the given Atom entry as a Salmon message.
+     *
+     * @fixme pass through the actor for signing?
+     *
+     * @param string $endpoint_uri
+     * @param string $xml
+     * @return boolean success
+     */
     public function post($endpoint_uri, $xml)
     {
         if (empty($endpoint_uri)) {
-            return FALSE;
+            return false;
         }
 
-        $xml = $this->createMagicEnv($xml);
-        
-        $headers = array('Content-type: application/atom+xml');
+        if (!common_config('ostatus', 'skip_signatures')) {
+            $xml = $this->createMagicEnv($xml);
+        }
+
+        $headers = array('Content-Type: application/atom+xml');
 
         try {
             $client = new HTTPClient();
@@ -51,7 +62,7 @@ class Salmon
                 $response->getStatus() . ': ' . $response->getBody());
             return false;
         }
-
+        return true;
     }
 
     public function createMagicEnv($text)
diff --git a/plugins/OStatus/lib/salmonaction.php b/plugins/OStatus/lib/salmonaction.php
index 09a042975d..83cf0b8f8a 100644
--- a/plugins/OStatus/lib/salmonaction.php
+++ b/plugins/OStatus/lib/salmonaction.php
@@ -41,7 +41,7 @@ class SalmonAction extends Action
             $this->clientError(_('This method requires a POST.'));
         }
 
-        if ($_SERVER['CONTENT_TYPE'] != 'application/atom+xml') {
+        if (empty($_SERVER['CONTENT_TYPE']) || $_SERVER['CONTENT_TYPE'] != 'application/atom+xml') {
             $this->clientError(_('Salmon requires application/atom+xml'));
         }
 
@@ -57,11 +57,13 @@ class SalmonAction extends Action
 
         // Check the signature
         $salmon = new Salmon;
-        if (!$salmon->verifyMagicEnv($dom)) {
-            common_log(LOG_DEBUG, "Salmon signature verification failed.");
-            $this->clientError(_m('Salmon signature verification failed.'));
+        if (!common_config('ostatus', 'skip_signatures')) {
+            if (!$salmon->verifyMagicEnv($dom)) {
+                common_log(LOG_DEBUG, "Salmon signature verification failed.");
+                $this->clientError(_m('Salmon signature verification failed.'));
+            }
         }
-            
+
         $this->act = new Activity($dom->documentElement);
         return true;
     }
@@ -101,6 +103,9 @@ class SalmonAction extends Action
             case ActivityVerb::JOIN:
                 $this->handleJoin();
                 break;
+            case ActivityVerb::LEAVE:
+                $this->handleLeave();
+                break;
             default:
                 throw new ClientException(_("Unimplemented."));
             }
@@ -154,6 +159,14 @@ class SalmonAction extends Action
         throw new ClientException(_("Unimplemented!"));
     }
 
+    /**
+     * Hmmmm
+     */
+    function handleLeave()
+    {
+        throw new ClientException(_("Unimplemented!"));
+    }
+
     /**
      * @return Ostatus_profile
      */

From 3c004729999f3f1a25ecb723a07af07c4b4c2bc8 Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Mon, 22 Feb 2010 22:23:37 +0100
Subject: [PATCH 51/97] Removed unnecessary assignment to
 SN.C.I.OStatusProfile. It can be brought back in the future if the value is
 to be set directly from the HTML script output.

---
 plugins/OStatus/js/ostatus.js | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/plugins/OStatus/js/ostatus.js b/plugins/OStatus/js/ostatus.js
index 8ba424a530..148a05f6f6 100644
--- a/plugins/OStatus/js/ostatus.js
+++ b/plugins/OStatus/js/ostatus.js
@@ -52,8 +52,7 @@ SN.U.StatusNetInstance = {
 
 SN.Init.OStatusCookie = function() {
     if (SN.U.StatusNetInstance.Get() === null) {
-        SN.C.I.OStatusProfile = SN.C.I.OStatusProfile || null;
-        SN.U.StatusNetInstance.Set({profile: SN.C.I.OStatusProfile});
+        SN.U.StatusNetInstance.Set({profile: null});
     }
 };
 

From 3b823f8fbde531b00f9770fb214543b965851036 Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Tue, 23 Feb 2010 00:27:41 +0100
Subject: [PATCH 52/97] Leaves the original URL alone and adds ? or & when it
 does the XHR.

---
 plugins/OStatus/js/ostatus.js | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/plugins/OStatus/js/ostatus.js b/plugins/OStatus/js/ostatus.js
index 148a05f6f6..1fc44b21b6 100644
--- a/plugins/OStatus/js/ostatus.js
+++ b/plugins/OStatus/js/ostatus.js
@@ -63,11 +63,10 @@ SN.U.DialogBox = {
             f.show();
         }
         else {
-            a[0].href = (a[0].href.match(/[\\?]/) === null) ? a[0].href+'?' : a[0].href+'&';
             $.ajax({
                 type: 'GET',
                 dataType: 'xml',
-                url: a[0].href+'ajax=1',
+                url: a[0].href + ((a[0].href.match(/[\\?]/) === null)?'?':'&') + 'ajax=1',
                 beforeSend: function(formData) {
                     a.addClass('processing');
                 },

From caad5859b51e8d9be87f234ebc91fdf2802816f1 Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Mon, 22 Feb 2010 19:00:27 -0500
Subject: [PATCH 53/97] swapping pear error handling so Crypt_RSA can properly
 detect available math libraries

---
 plugins/OStatus/lib/magicsig.php | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/plugins/OStatus/lib/magicsig.php b/plugins/OStatus/lib/magicsig.php
index af65bad046..50eb301ab3 100644
--- a/plugins/OStatus/lib/magicsig.php
+++ b/plugins/OStatus/lib/magicsig.php
@@ -57,8 +57,10 @@ class MagicsigRsaSha256
         $keypair = new Crypt_RSA_KeyPair($key_length);
         $params['public_key'] = $keypair->getPublicKey();
         $params['private_key'] = $keypair->getPrivateKey();
-        
+
+        PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
         $this->keypair = new Crypt_RSA($params);
+        PEAR::popErrorHandling();
     }
 
 
@@ -79,6 +81,8 @@ class MagicsigRsaSha256
     
     public function fromString($text)
     {
+        PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
+
         // remove whitespace
         $text = preg_replace('/\s+/', '', $text);
 
@@ -86,7 +90,6 @@ class MagicsigRsaSha256
         if (!preg_match('/RSA\.([^\.]+)\.([^\.]+)(.([^\.]+))?/', $text, $matches)) {
             return false;
         }
-
         
         $mod = base64_url_decode($matches[1]);
         $exp = base64_url_decode($matches[2]);
@@ -110,6 +113,7 @@ class MagicsigRsaSha256
         }
 
         $this->keypair = new Crypt_RSA($params);
+        PEAR::popErrorHandling();
     }
 
     public function getName()

From d410df040684f443d14bd921c450ca464d52c9d4 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Tue, 23 Feb 2010 00:44:45 +0000
Subject: [PATCH 54/97] OStatus group delivery initial implementation. - added
 rel="ostatus:attention" links for group delivery - added events for plugins
 to override group profile/permalink pages - pulled Notice::saveGroups up to
 save-time so we can override;   it's relatively cheap and gives us a clean
 list of target   groups for distrib time even with customized delivery. -
 fixed notice::getGroups to return group objects as expected - added some doc
 on new parameters to Notice::saveNew  - 'groups' list of group IDs to push to
 in place of parsing - messages that come in via PuSH and contain local group
 targets   are delivered to local group members - messages that come in via
 PuSH and contain remote group targets   are delivered to local members of the
 remote group

Todo:
- handle group posts that only come through Salmon
- handle conflicts in case something comes in both through Salmon and PuSH
- better source verification
- need a cleaner interface to look up groups by URI
- need a way to handle remote groups with conflicting names
---
 actions/apitimelinegroup.php                  |   3 +-
 classes/Notice.php                            | 111 +++++++++++++++++-
 classes/User_group.php                        |  18 ++-
 lib/distribqueuehandler.php                   |  14 +--
 plugins/OStatus/OStatusPlugin.php             |  16 +++
 plugins/OStatus/classes/Ostatus_profile.php   |  75 ++++++++++--
 .../OStatus/lib/hubdistribqueuehandler.php    |   2 +-
 7 files changed, 207 insertions(+), 32 deletions(-)

diff --git a/actions/apitimelinegroup.php b/actions/apitimelinegroup.php
index 1d0c4afdd0..0bb4860ea7 100644
--- a/actions/apitimelinegroup.php
+++ b/actions/apitimelinegroup.php
@@ -176,7 +176,8 @@ class ApiTimelineGroupAction extends ApiPrivateAuthAction
 
                 $atom->addEntryFromNotices($this->notices);
 
-                $this->raw($atom->getString());
+                //$this->raw($atom->getString());
+                print $atom->getString(); // temp hack until PuSH feeds are redone cleanly
 
             } catch (Atom10FeedException $e) {
                 $this->serverError(
diff --git a/classes/Notice.php b/classes/Notice.php
index a12839d729..754c126ed1 100644
--- a/classes/Notice.php
+++ b/classes/Notice.php
@@ -187,7 +187,14 @@ class Notice extends Memcached_DataObject
      *              int 'location_ns' geoname namespace to interpret location_id
      *              int 'reply_to'; notice ID this is a reply to
      *              int 'repeat_of'; notice ID this is a repeat of
-     *              string 'uri' permalink to notice; defaults to local notice URL
+     *              string 'uri' unique ID for notice; defaults to local notice URL
+     *              string 'url' permalink to notice; defaults to local notice URL
+     *              string 'rendered' rendered HTML version of content
+     *              array 'replies' list of profile URIs for reply delivery in
+     *                              place of extracting @-replies from content.
+     *              array 'groups' list of group IDs to deliver to, in place of
+     *                              extracting ! tags from content
+     * @fixme tag override
      *
      * @return Notice
      * @throws ClientException
@@ -342,6 +349,12 @@ class Notice extends Memcached_DataObject
             $notice->saveReplies();
         }
 
+        if (isset($groups)) {
+            $notice->saveKnownGroups($groups);
+        } else {
+            $notice->saveGroups();
+        }
+
         $notice->distribute();
 
         return $notice;
@@ -692,7 +705,22 @@ class Notice extends Memcached_DataObject
         return $ni;
     }
 
-    function addToInboxes($groups, $recipients)
+    /**
+     * Adds this notice to the inboxes of each local user who should receive
+     * it, based on author subscriptions, group memberships, and @-replies.
+     *
+     * Warning: running a second time currently will make items appear
+     * multiple times in users' inboxes.
+     *
+     * @fixme make more robust against errors
+     * @fixme break up massive deliveries to smaller background tasks
+     *
+     * @param array $groups optional list of Group objects;
+     *              if left empty, will be loaded from group_inbox records
+     * @param array $recipient optional list of reply profile ids
+     *              if left empty, will be loaded from reply records
+     */
+    function addToInboxes($groups=null, $recipients=null)
     {
         $ni = $this->whoGets($groups, $recipients);
 
@@ -742,6 +770,42 @@ class Notice extends Memcached_DataObject
     }
 
     /**
+     * Record this notice to the given group inboxes for delivery.
+     * Overrides the regular parsing of !group markup.
+     *
+     * @param string $group_ids
+     * @fixme might prefer URIs as identifiers, as for replies?
+     *        best with generalizations on user_group to support
+     *        remote groups better.
+     */
+    function saveKnownGroups($group_ids)
+    {
+        if (!is_array($group_ids)) {
+            throw new ServerException("Bad type provided to saveKnownGroups");
+        }
+
+        $groups = array();
+        foreach ($group_ids as $id) {
+            $group = User_group::staticGet('id', $id);
+            if ($group) {
+                common_log(LOG_ERR, "Local delivery to group id $id, $group->nickname");
+                $result = $this->addToGroupInbox($group);
+                if (!$result) {
+                    common_log_db_error($gi, 'INSERT', __FILE__);
+                }
+
+                // @fixme should we save the tags here or not?
+                $groups[] = clone($group);
+            } else {
+                common_log(LOG_ERR, "Local delivery to group id $id skipped, doesn't exist");
+            }
+        }
+
+        return $groups;
+    }
+
+    /**
+     * Parse !group delivery and record targets into group_inbox.
      * @return array of Group objects
      */
     function saveGroups()
@@ -824,6 +888,19 @@ class Notice extends Memcached_DataObject
         return true;
     }
 
+    /**
+     * Save reply records indicating that this notice needs to be
+     * delivered to the local users with the given URIs.
+     *
+     * Since this is expected to be used when saving foreign-sourced
+     * messages, we won't deliver to any remote targets as that's the
+     * source service's responsibility.
+     *
+     * @fixme Unlike saveReplies() there's no mail notification here.
+     *        Move that to distrib queue handler?
+     *
+     * @param array of unique identifier URIs for recipients
+     */
     function saveKnownReplies($uris)
     {
         foreach ($uris as $uri) {
@@ -845,6 +922,13 @@ class Notice extends Memcached_DataObject
     }
 
     /**
+     * Pull @-replies from this message's content in StatusNet markup format
+     * and save reply records indicating that this message needs to be
+     * delivered to those users.
+     *
+     * Side effect: local recipients get e-mail notifications here.
+     * @fixme move mail notifications to distrib?
+     *
      * @return array of integer profile IDs
      */
 
@@ -934,9 +1018,10 @@ class Notice extends Memcached_DataObject
     }
 
     /**
-     * Same calculation as saveGroups but without the saving
-     * @fixme merge the functions
-     * @return array of Group_inbox objects
+     * Pull list of groups this notice needs to be delivered to,
+     * as previously recorded by saveGroups() or saveKnownGroups().
+     *
+     * @return array of Group objects
      */
     function getGroups()
     {
@@ -959,7 +1044,10 @@ class Notice extends Memcached_DataObject
 
         if ($gi->find()) {
             while ($gi->fetch()) {
-                $groups[] = clone($gi);
+                $group = User_group::staticGet('id', $gi->group_id);
+                if ($group) {
+                    $groups[] = $group;
+                }
             }
         }
 
@@ -1063,6 +1151,17 @@ class Notice extends Memcached_DataObject
             }
         }
 
+        $groups = $this->getGroups();
+
+        foreach ($groups as $group) {
+            $xs->element(
+                'link', array(
+                    'rel' => 'ostatus:attention',
+                    'href' => $group->permalink()
+                )
+            );
+        }
+
         if (!empty($this->repeat_of)) {
             $repeat = Notice::staticGet('id', $this->repeat_of);
             if (!empty($repeat)) {
diff --git a/classes/User_group.php b/classes/User_group.php
index 379e6b7219..1382aa407c 100644
--- a/classes/User_group.php
+++ b/classes/User_group.php
@@ -39,14 +39,24 @@ class User_group extends Memcached_DataObject
 
     function homeUrl()
     {
-        return common_local_url('showgroup',
-                                array('nickname' => $this->nickname));
+        $url = null;
+        if (Event::handle('StartUserGroupHomeUrl', array($this, &$url))) {
+            $url = common_local_url('showgroup',
+                                    array('nickname' => $this->nickname));
+        }
+        Event::handle('EndUserGroupHomeUrl', array($this, &$url));
+        return $url;
     }
 
     function permalink()
     {
-        return common_local_url('groupbyid',
-                                array('id' => $this->id));
+        $url = null;
+        if (Event::handle('StartUserGroupPermalink', array($this, &$url))) {
+            $url = common_local_url('groupbyid',
+                                    array('id' => $this->id));
+        }
+        Event::handle('EndUserGroupPermalink', array($this, &$url));
+        return $url;
     }
 
     function getNotices($offset, $limit, $since_id=null, $max_id=null)
diff --git a/lib/distribqueuehandler.php b/lib/distribqueuehandler.php
index c31b675c1a..dc183fb36a 100644
--- a/lib/distribqueuehandler.php
+++ b/lib/distribqueuehandler.php
@@ -69,19 +69,7 @@ class DistribQueueHandler
         }
 
         try {
-            $groups = $notice->saveGroups();
-        } catch (Exception $e) {
-            $this->logit($notice, $e);
-        }
-
-        try {
-            $recipients = $notice->getReplies();
-        } catch (Exception $e) {
-            $this->logit($notice, $e);
-        }
-
-        try {
-            $notice->addToInboxes($groups, $recipients);
+            $notice->addToInboxes();
         } catch (Exception $e) {
             $this->logit($notice, $e);
         }
diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 061ed4bd1b..472008419a 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -591,6 +591,22 @@ class OStatusPlugin extends Plugin
         return true;
     }
 
+    function onStartUserGroupHomeUrl($group, &$url)
+    {
+        return $this->onStartUserGroupPermalink($group, &$url);
+    }
+
+    function onStartUserGroupPermalink($group, &$url)
+    {
+        $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
+        if ($oprofile) {
+            // @fixme this should probably be in the user_group table
+            // @fixme this uri not guaranteed to be a profile page
+            $url = $oprofile->uri;
+            return false;
+        }
+    }
+
     function onStartShowSubscriptionsContent($action)
     {
         $user = common_current_user();
diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index c0e39add8f..e8cc13c6c1 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -501,6 +501,7 @@ class Ostatus_profile extends Memcached_DataObject
     /**
      * Process an incoming post activity from this remote feed.
      * @param Activity $activity
+     * @fixme break up this function, it's getting nasty long
      */
     protected function processPost($activity)
     {
@@ -518,7 +519,6 @@ class Ostatus_profile extends Memcached_DataObject
             }
             $oprofile = $this;
         }
-
         $sourceUri = $activity->object->id;
 
         $dupe = Notice::staticGet('uri', $sourceUri);
@@ -555,15 +555,76 @@ class Ostatus_profile extends Memcached_DataObject
             }
         }
 
-        // @fixme ensure that groups get handled correctly
+        $profile = $oprofile->localProfile();
+        $params['groups'] = array();
+        $params['replies'] = array();
+        if ($activity->context) {
+            foreach ($activity->context->attention as $recipient) {
+                $roprofile = Ostatus_profile::staticGet('uri', $recipient);
+                if ($roprofile) {
+                    if ($roprofile->isGroup()) {
+                        // Deliver to local recipients of this remote group.
+                        // @fixme sender verification?
+                        $params['groups'][] = $roprofile->group_id;
+                        continue;
+                    } else {
+                        // Delivery to remote users is the source service's job.
+                        continue;
+                    }
+                }
+    
+                $user = User::staticGet('uri', $recipient);
+                if ($user) {
+                    // An @-reply directed to a local user.
+                    // @fixme sender verification, spam etc?
+                    $params['replies'][] = $recipient;
+                    continue;
+                }
+    
+                // @fixme we need a uri on user_group
+                // $group = User_group::staticGet('uri', $recipient);
+                $template = common_local_url('groupbyid', array('id' => '31337'));
+                $template = preg_quote($template, '/');
+                $template = str_replace('31337', '(\d+)', $template);
+                common_log(LOG_DEBUG, $template);
+                if (preg_match("/$template/", $recipient, $matches)) {
+                    $id = $matches[1];
+                    $group = User_group::staticGet('id', $id);
+                    if ($group) {
+                        // Deliver to all members of this local group.
+                        // @fixme sender verification?
+                        if ($profile->isMember($group)) {
+                            common_log(LOG_DEBUG, "delivering to group $id $group->nickname");
+                            $params['groups'][] = $group->id;
+                        } else {
+                            common_log(LOG_DEBUG, "not delivering to group $id $group->nickname because sender $profile->nickname is not a member");
+                        }
+                        continue;
+                    } else {
+                        common_log(LOG_DEBUG, "not delivering to missing group $id");
+                    }
+                } else {
+                    common_log(LOG_DEBUG, "not delivering to groups for $recipient");
+                }
+            }
+        }
 
-        $saved = Notice::saveNew($oprofile->localProfile()->id,
-                                 $content,
-                                 'ostatus',
-                                 $params);
+        try {
+            $saved = Notice::saveNew($profile->id,
+                                     $content,
+                                     'ostatus',
+                                     $params);
+        } catch (Exception $e) {
+            common_log(LOG_ERR, "Failed saving notice entry for $sourceUri: " . $e->getMessage());
+            return;
+        }
 
         // Record which feed this came through...
-        Ostatus_source::saveNew($saved, $this, 'push');
+        try {
+            Ostatus_source::saveNew($saved, $this, 'push');
+        } catch (Exception $e) {
+            common_log(LOG_ERR, "Failed saving ostatus_source entry for $saved->notice_id: " . $e->getMessage());
+        }
     }
 
     /**
diff --git a/plugins/OStatus/lib/hubdistribqueuehandler.php b/plugins/OStatus/lib/hubdistribqueuehandler.php
index 30a427e3fc..c2bd630f9c 100644
--- a/plugins/OStatus/lib/hubdistribqueuehandler.php
+++ b/plugins/OStatus/lib/hubdistribqueuehandler.php
@@ -36,7 +36,7 @@ class HubDistribQueueHandler extends QueueHandler
 
         $this->pushUser($notice);
         foreach ($notice->getGroups() as $group) {
-            $this->pushGroup($notice, $group->group_id);
+            $this->pushGroup($notice, $group->id);
         }
         return true;
     }

From a3e800e67c8ced785a1ca6c2628cc5116ef44730 Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@status.net>
Date: Mon, 22 Feb 2010 16:46:54 -0800
Subject: [PATCH 55/97] Add PoCo bits, avatar link, geo point, etc. to person
 activity obj output

---
 plugins/OStatus/lib/activity.php | 152 +++++++++++++++++++++++++++++--
 1 file changed, 146 insertions(+), 6 deletions(-)

diff --git a/plugins/OStatus/lib/activity.php b/plugins/OStatus/lib/activity.php
index a26248f199..585028318d 100644
--- a/plugins/OStatus/lib/activity.php
+++ b/plugins/OStatus/lib/activity.php
@@ -31,10 +31,117 @@ if (!defined('STATUSNET')) {
     exit(1);
 }
 
+class PoCoURL
+{
+    const TYPE      = 'type';
+    const VALUE     = 'value';
+    const PRIMARY   = 'primary';
+
+    public $type;
+    public $value;
+    public $primary;
+
+    function __construct($type, $value, $primary = false)
+    {
+        $this->type    = $type;
+        $this->value   = $value;
+        $this->primary = $primary;
+    }
+
+    function asString()
+    {
+        $xs = new XMLStringer(true);
+        $xs->elementStart('poco:urls');
+        $xs->element('poco:type', null, $this->type);
+        $xs->element('poco:value', null, $this->value);
+        if ($this->primary) {
+            $xs->element('poco:primary', null, 'true');
+        }
+        $xs->elementEnd('poco:urls');
+        return $xs->getString();
+    }
+}
+
+class PoCoAddress
+{
+    const ADDRESS   = 'address';
+    const FORMATTED = 'formatted';
+
+    public $formatted;
+
+    function __construct($formatted)
+    {
+        if (empty($formatted)) {
+            return null;
+        }
+        $this->formatted = $formatted;
+    }
+
+    function asString()
+    {
+        $xs = new XMLStringer(true);
+        $xs->elementStart('poco:address');
+        $xs->element('poco:formatted', null, $this->formatted);
+        $xs->elementEnd('poco:address');
+        return $xs->getString();
+    }
+}
+
 class PoCo
 {
     const NS = 'http://portablecontacts.net/spec/1.0';
-    const USERNAME = 'preferredUsername';
+
+    const USERNAME  = 'preferredUsername';
+    const NOTE      = 'note';
+    const URLS      = 'urls';
+
+    public $preferredUsername;
+    public $note;
+    public $address;
+    public $urls = array();
+
+    function __construct($profile)
+    {
+        $this->preferredUsername = $profile->nickname;
+
+        $this->note    = $profile->bio;
+        $this->address = new PoCoAddress($profile->location);
+
+        if (!empty($profile->homepage)) {
+            array_push(
+                $this->urls,
+                new PoCoURL(
+                    'homepage',
+                    $profile->homepage,
+                    true
+                )
+            );
+        }
+    }
+
+    function asString()
+    {
+        $xs = new XMLStringer(true);
+        $xs->element(
+            'poco:preferredUsername',
+            null,
+            $this->preferredUsername
+        );
+
+        if (!empty($this->note)) {
+            $xs->element('poco:note', null, $this->note);
+        }
+
+        if (!empty($this->address)) {
+            $xs->raw($this->address->asString());
+        }
+
+        foreach ($this->urls as $url) {
+            $xs->raw($url->asString());
+        }
+
+        return $xs->getString();
+    }
 }
 
 /**
@@ -265,6 +372,7 @@ class ActivityObject
     public $link;
     public $source;
     public $avatar;
+    public $geopoint;
 
     /**
      * Constructor
@@ -371,10 +479,17 @@ class ActivityObject
     {
         $object = new ActivityObject();
 
-        $object->type  = ActivityObject::PERSON;
-        $object->id    = $profile->getUri();
-        $object->title = $profile->getBestName();
-        $object->link  = $profile->profileurl;
+        $object->type   = ActivityObject::PERSON;
+        $object->id     = $profile->getUri();
+        $object->title  = $profile->getBestName();
+        $object->link   = $profile->profileurl;
+        $object->avatar = $profile->getAvatar(AVATAR_PROFILE_SIZE);
+
+        if (isset($profile->lat) && isset($profile->lon)) {
+            $object->geopoint = (float)$profile->lat . ' ' . (float)$profile->lon;
+        }
+
+        $object->poco = new PoCo($profile);
 
         return $object;
     }
@@ -404,7 +519,32 @@ class ActivityObject
 
         if (!empty($this->link)) {
             $xs->element('link', array('rel' => 'alternate', 'type' => 'text/html'),
-                         $this->content);
+                         $this->link);
+        }
+
+        if ($this->type == ActivityObject::PERSON) {
+            $xs->element(
+                'link', array(
+                    'type' => empty($this->avatar) ? 'image/png' : $this->avatar->mediatype,
+                    'rel'  => 'avatar',
+                    'href' => empty($this->avatar)
+                    ? Avatar::defaultImage(AVATAR_PROFILE_SIZE)
+                    : $this->avatar->displayUrl()
+                ),
+                ''
+            );
+        }
+
+        if (!empty($this->geopoint)) {
+            $xs->element(
+                'georss:point',
+                null,
+                $this->geopoint
+            );
+        }
+
+        if (!empty($this->poco)) {
+            $xs->raw($this->poco->asString());
         }
 
         $xs->elementEnd($tag);

From 6a711c6cdc5d1e1b1a64e5858b12e6964a0abe9c Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@status.net>
Date: Mon, 22 Feb 2010 17:10:50 -0800
Subject: [PATCH 56/97] Move ActivityObject and related stuff to core

---
 classes/Notice.php                        | 21 +-----
 classes/Profile.php                       | 78 +----------------------
 {plugins/OStatus/lib => lib}/activity.php |  3 +-
 3 files changed, 6 insertions(+), 96 deletions(-)
 rename {plugins/OStatus/lib => lib}/activity.php (99%)

diff --git a/classes/Notice.php b/classes/Notice.php
index a12839d729..ba8646f68e 100644
--- a/classes/Notice.php
+++ b/classes/Notice.php
@@ -1119,25 +1119,8 @@ class Notice extends Memcached_DataObject
      */
     function asActivityNoun($element)
     {
-        $xs = new XMLStringer(true);
-
-        $xs->elementStart('activity:' . $element);
-        $xs->element('activity:object-type',
-                     null,
-                     'http://activitystrea.ms/schema/1.0/note');
-        $xs->element('id',
-                     null,
-                     $this->uri);
-        $xs->element('content',
-                     array('type' => 'text/html'),
-                     $this->rendered);
-        $xs->element('link',
-                     array('type' => 'text/html',
-                           'rel'  => 'alternate',
-                           'href' => $this->bestUrl()));
-        $xs->elementEnd('activity:' . $element);
-
-        return $xs->getString();
+        $noun = ActivityObject::fromNotice($this);
+        return $noun->asString('activity:' . $element);
     }
 
     function bestUrl()
diff --git a/classes/Profile.php b/classes/Profile.php
index 7fb2b87bc3..78223b34a1 100644
--- a/classes/Profile.php
+++ b/classes/Profile.php
@@ -801,82 +801,8 @@ class Profile extends Memcached_DataObject
      */
     function asActivityNoun($element)
     {
-        $xs = new XMLStringer(true);
-
-        $xs->elementStart('activity:' . $element);
-        $xs->element(
-            'activity:object-type',
-            null,
-            'http://activitystrea.ms/schema/1.0/person'
-        );
-        $xs->element(
-            'id',
-            null,
-            $this->getUri()
-        );
-
-        // title should contain fullname
-        $xs->element('title', null, $this->getBestName());
-
-        $xs->element('link', array('rel' => 'alternate',
-                                   'type' => 'text/html'),
-                     $this->profileurl);
-
-        $xs->element('poco:preferredUsername', null, $this->nickname);
-
-        // Portable Contacts stuff
-
-        if (isset($this->bio)) {
-
-            // XXX: Possible to use OpenSocial's aboutMe?
-
-            $xs->element('poco:note', null, $this->bio);
-        }
-
-        if (isset($this->homepage)) {
-
-            $xs->elementStart('poco:urls');
-            $xs->element('poco:value', null, $this->homepage);
-            $xs->element('poco:type', null, 'homepage');
-            $xs->element('poco:primary', null, 'true');
-            $xs->elementEnd('poco:urls');
-        }
-
-        if (isset($this->location)) {
-            $xs->elementStart('poco:address');
-            $xs->element('poco:formatted', null, $this->location);
-            $xs->elementEnd('poco:address');
-        }
-
-        if (isset($this->lat) && isset($this->lon)) {
-            $this->element(
-                'georss:point',
-                null,
-                (float)$this->lat . ' ' . (float)$this->lon
-            );
-        }
-
-        // XXX: Should we send all avatar sizes we have?  I think
-        // cliqset does -Z
-
-        $avatar = $this->getAvatar(AVATAR_PROFILE_SIZE);
-
-        $xs->element(
-            'link', array(
-                'type' => empty($avatar) ? 'image/png' : $avatar->mediatype,
-                'rel'  => 'avatar',
-                'href' => empty($avatar)
-                ? Avatar::defaultImage(AVATAR_PROFILE_SIZE)
-                : $avatar->displayUrl()
-            ),
-            ''
-        );
-
-        $xs->elementEnd('activity:' . $element);
-
-        // XXX: Add people tags with <poco:tags> plural?
-
-        return $xs->getString();
+        $noun = ActivityObject::fromProfile($this);
+        return $noun->asString('activity:' . $element);
     }
 
     /**
diff --git a/plugins/OStatus/lib/activity.php b/lib/activity.php
similarity index 99%
rename from plugins/OStatus/lib/activity.php
rename to lib/activity.php
index 585028318d..3689dac385 100644
--- a/plugins/OStatus/lib/activity.php
+++ b/lib/activity.php
@@ -19,9 +19,10 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
- * @category  OStatus
+ * @category  Feed
  * @package   StatusNet
  * @author    Evan Prodromou <evan@status.net>
+ * @author    Zach Copley <zach@status.net>
  * @copyright 2010 StatusNet, Inc.
  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
  * @link      http://status.net/

From 1f859e72a205807ca15cc8e22e82e8e112979de9 Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@status.net>
Date: Mon, 22 Feb 2010 17:47:40 -0800
Subject: [PATCH 57/97] Add activity.php to common includes

---
 lib/activity.php | 6 ------
 lib/common.php   | 1 +
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/lib/activity.php b/lib/activity.php
index d91e04260c..3689dac385 100644
--- a/lib/activity.php
+++ b/lib/activity.php
@@ -476,9 +476,6 @@ class ActivityObject
         return $object;
     }
 
-    /**
-     * @fixme missing avatar, bio info, etc
-     */
     static function fromProfile($profile)
     {
         $object = new ActivityObject();
@@ -498,9 +495,6 @@ class ActivityObject
         return $object;
     }
 
-    /**
-     * @fixme missing avatar, bio info, etc
-     */
     function asString($tag='activity:object')
     {
         $xs = new XMLStringer(true);
diff --git a/lib/common.php b/lib/common.php
index b95cd11752..68723955ec 100644
--- a/lib/common.php
+++ b/lib/common.php
@@ -123,6 +123,7 @@ require_once INSTALLDIR.'/lib/util.php';
 require_once INSTALLDIR.'/lib/action.php';
 require_once INSTALLDIR.'/lib/mail.php';
 require_once INSTALLDIR.'/lib/subs.php';
+require_once INSTALLDIR.'/lib/activity.php';
 
 require_once INSTALLDIR.'/lib/clientexception.php';
 require_once INSTALLDIR.'/lib/serverexception.php';

From 89dc6dee01b08a2dc529449e6006fe772d46b72d Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@status.net>
Date: Mon, 22 Feb 2010 17:56:43 -0800
Subject: [PATCH 58/97] Add PoCo namespace to optional ns output in
 Notice::asAtomEntry()

---
 classes/Notice.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/classes/Notice.php b/classes/Notice.php
index 92d959dc56..e8d5c45cb2 100644
--- a/classes/Notice.php
+++ b/classes/Notice.php
@@ -1067,6 +1067,7 @@ class Notice extends Memcached_DataObject
                            'xmlns:thr' => 'http://purl.org/syndication/thread/1.0',
                            'xmlns:georss' => 'http://www.georss.org/georss',
                            'xmlns:activity' => 'http://activitystrea.ms/spec/1.0/',
+                           'xmlns:poco' => 'http://portablecontacts.net/spec/1.0',
                            'xmlns:ostatus' => 'http://ostatus.org/schema/1.0');
         } else {
             $attrs = array();

From 193448d1be53e27232477bed4d3fa7c2c6f39fbf Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Tue, 23 Feb 2010 01:58:05 +0000
Subject: [PATCH 59/97] OStatus: cleanup on ostatussub preparing for final UI
 work on the remote sub/join forms.

---
 plugins/OStatus/actions/ostatussub.php | 397 +++++++++++++++----------
 1 file changed, 242 insertions(+), 155 deletions(-)

diff --git a/plugins/OStatus/actions/ostatussub.php b/plugins/OStatus/actions/ostatussub.php
index 592ae387ea..ffa88cb088 100644
--- a/plugins/OStatus/actions/ostatussub.php
+++ b/plugins/OStatus/actions/ostatussub.php
@@ -24,70 +24,29 @@
 
 if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
 
+/**
+ * Key UI methods:
+ *
+ *  showInputForm() - form asking for a remote profile account or URL
+ *                    We end up back here on errors
+ *
+ *  showPreviewForm() - surrounding form for preview-and-confirm
+ *    previewUser() - display profile for a remote user
+ *    previewGroup() - display profile for a remote group
+ *
+ *  successUser() - redirects to subscriptions page on subscribe
+ *  successGroup() - redirects to groups page on join
+ */
 class OStatusSubAction extends Action
 {
-    protected $profile_uri;
-    protected $preview;
-    protected $munger;
+    protected $profile_uri; // provided acct: or URI of remote entity
+    protected $oprofile; // Ostatus_profile of remote entity, if valid
 
     /**
-     * Title of the page
-     *
-     * @return string Title of the page
+     * Show the initial form, when we haven't yet been given a valid
+     * remote profile.
      */
-
-    function title()
-    {
-        return _m('Authorize subscription');
-    }
-
-    /**
-     * Instructions for use
-     *
-     * @return instructions for use
-     */
-
-    function getInstructions()
-    {
-        return _m('You can subscribe to users from other supported sites. Paste their address or profile URI below:');
-    }
-
-    function showForm($error=null)
-    {
-        $this->error = $error;
-        if ($this->boolean('ajax')) {
-            header('Content-Type: text/xml;charset=utf-8');
-            $this->xw->startDocument('1.0', 'UTF-8');
-            $this->elementStart('html');
-            $this->elementStart('head');
-            $this->element('title', null, _m('Subscribe to user'));
-            $this->elementEnd('head');
-            $this->elementStart('body');
-            $this->showContent();
-            $this->elementEnd('body');
-            $this->elementEnd('html');
-        } else {
-            $this->showPage();
-        }
-    }
-
-    function showPageNotice()
-    {
-        if ($this->error) {
-            $this->element('p', 'error', $this->error);
-        }
-    }
-
-    /**
-     * Content area of the page
-     *
-     * Shows a form for associating a remote OStatus account with this
-     * StatusNet account.
-     *
-     * @return void
-     */
-
-    function showContent()
+    function showInputForm()
     {
         $user = common_current_user();
 
@@ -112,18 +71,167 @@ class OStatusSubAction extends Action
         $this->elementEnd('li');
         $this->elementEnd('ul');
 
-        if ($this->preview) {
-            $this->submit('subscribe', _m('Subscribe'));
-        } else {
-            $this->submit('validate', _m('Continue'));
-        }
+        $this->submit('validate', _m('Continue'));
 
         $this->elementEnd('fieldset');
 
         $this->elementEnd('form');
+    }
 
-        if ($this->preview) {
-            $this->previewFeed();
+    /**
+     * Show the preview-and-confirm form. We've got a valid remote
+     * profile and are ready to poke it!
+     *
+     * This controls the wrapper form; actual profile display will
+     * be in previewUser() or previewGroup() depending on the type.
+     */
+    function showPreviewForm()
+    {
+        $this->elementStart('form', array('method' => 'post',
+                                          'id' => 'form_ostatus_sub',
+                                          'class' => 'form_settings',
+                                          'action' =>
+                                          common_local_url('ostatussub')));
+
+        $this->hidden('token', common_session_token());
+        $this->hidden('profile', $this->profile_uri);
+
+        $this->elementStart('fieldset', array('id' => 'settings_feeds'));
+
+        if ($this->oprofile->isGroup()) {
+            $this->previewGroup();
+            $this->submit('subscribe', _m('Join'));
+        } else {
+            $this->previewUser();
+            $this->submit('subscribe', _m('Subscribe'));
+        }
+
+
+        $this->elementEnd('fieldset');
+
+        $this->elementEnd('form');
+    }
+
+    /**
+     * Show a preview for a remote user's profile
+     */
+    function previewUser()
+    {
+        $oprofile = $this->oprofile;
+        $profile = $oprofile->localProfile();
+
+        $this->text(sprintf(_m("Remote user %s"), $profile->nickname));
+        // ...
+    }
+
+    /**
+     * Show a preview for a remote group's profile
+     */
+    function previewGroup()
+    {
+        $oprofile = $this->oprofile;
+        $group = $oprofile->localGroup();
+
+        $this->text(sprintf(_m("Remote group %s"), $group->nickname));
+        // ..
+    }
+
+    /**
+     * Redirect on successful remote user subscription
+     */
+    function successUser()
+    {
+        $cur = common_current_user();
+        $url = common_local_url('subscriptions', array('nickname' => $cur->nickname));
+        common_redirect($url, 303);
+    }
+
+    /**
+     * Redirect on successful remote group join
+     */
+    function successGroup()
+    {
+        $cur = common_current_user();
+        $url = common_local_url('usergroups', array('nickname' => $cur->nickname));
+        common_redirect($url, 303);
+    }
+
+    /**
+     * Pull data for a remote profile and check if it's valid.
+     * Fills out error UI string in $this->error
+     * Fills out $this->oprofile on success.
+     *
+     * @return boolean
+     */
+    function validateFeed()
+    {
+        $profile_uri = trim($this->arg('profile'));
+
+        if ($profile_uri == '') {
+            $this->showForm(_m('Empty remote profile URL!'));
+            return;
+        }
+        $this->profile_uri = $profile_uri;
+
+        // @fixme validate, normalize bla bla
+        try {
+            $oprofile = Ostatus_profile::ensureProfile($this->profile_uri);
+            $this->oprofile = $oprofile;
+            return true;
+        } catch (FeedSubBadURLException $e) {
+            $this->error = _m('Invalid URL or could not reach server.');
+        } catch (FeedSubBadResponseException $e) {
+            $this->error = _m('Cannot read feed; server returned error.');
+        } catch (FeedSubEmptyException $e) {
+            $this->error = _m('Cannot read feed; server returned an empty page.');
+        } catch (FeedSubBadHTMLException $e) {
+            $this->error = _m('Bad HTML, could not find feed link.');
+        } catch (FeedSubNoFeedException $e) {
+            $this->error = _m('Could not find a feed linked from this URL.');
+        } catch (FeedSubUnrecognizedTypeException $e) {
+            $this->error = _m('Not a recognized feed type.');
+        } catch (FeedSubException $e) {
+            // Any new ones we forgot about
+            $this->error = sprintf(_m('Bad feed URL: %s %s'), get_class($e), $e->getMessage());
+        }
+
+        return false;
+    }
+
+    /**
+     * Attempt to finalize subscription.
+     * validateFeed must have been run first.
+     *
+     * Calls showForm on failure or successUser/successGroup on success.
+     */
+    function saveFeed()
+    {
+        // And subscribe the current user to the local profile
+        $user = common_current_user();
+
+        if (!$this->oprofile->subscribe()) {
+            $this->showForm(_m("Failed to set up server-to-server subscription."));
+            return;
+        }
+
+        if ($this->oprofile->isGroup()) {
+            $group = $this->oprofile->localGroup();
+            if ($user->isMember($group)) {
+                $this->showForm(_m('Already a member!'));
+            } elseif (Group_member::join($this->oprofile->group_id, $user->id)) {
+                $this->successGroup();
+            } else {
+                $this->showForm(_m('Remote group join failed!'));
+            }
+        } else {
+            $local = $this->oprofile->localProfile();
+            if ($user->isSubscribed($local)) {
+                $this->showForm(_m('Already subscribed!'));
+            } elseif ($this->oprofile->subscribeLocalToRemote($user)) {
+                $this->successUser();
+            } else {
+                $this->showForm(_m('Remote subscription failed!'));
+            }
         }
     }
 
@@ -145,28 +253,26 @@ class OStatusSubAction extends Action
         return true;
     }
 
+    /**
+     * Handle the submission.
+     */
     function handle($args)
     {
         parent::handle($args);
         if ($_SERVER['REQUEST_METHOD'] == 'POST') {
             $this->handlePost();
         } else {
-            if ($this->profile_uri) {
-                $this->validateAndPreview();
-            } else {
-                $this->showForm();
+            if ($this->arg('profile')) {
+                $this->validateFeed();
             }
+            $this->showForm();
         }
     }
 
+
     /**
      * Handle posts to this form
      *
-     * Based on the button that was pressed, muxes out to other functions
-     * to do the actual task requested.
-     *
-     * All sub-functions reload the form with a message -- success or failure.
-     *
      * @return void
      */
 
@@ -180,103 +286,84 @@ class OStatusSubAction extends Action
             return;
         }
 
-        if ($this->arg('validate')) {
-            $this->validateAndPreview();
-        } else if ($this->arg('subscribe')) {
-            $this->saveFeed();
+        if ($this->validateFeed()) {
+            if ($this->arg('subscribe')) {
+                $this->saveFeed();
+                return;
+            }
+        }
+        $this->showForm();
+    }
+
+    /**
+     * Show the appropriate form based on our input state.
+     */
+    function showForm($err=null)
+    {
+        if ($err) {
+            $this->error = $err;
+        }
+        if ($this->boolean('ajax')) {
+            header('Content-Type: text/xml;charset=utf-8');
+            $this->xw->startDocument('1.0', 'UTF-8');
+            $this->elementStart('html');
+            $this->elementStart('head');
+            $this->element('title', null, _m('Subscribe to user'));
+            $this->elementEnd('head');
+            $this->elementStart('body');
+            $this->showContent();
+            $this->elementEnd('body');
+            $this->elementEnd('html');
         } else {
-            $this->showForm(_('Unexpected form submission.'));
+            $this->showPage();
         }
     }
 
     /**
-     * Set up and add a feed
+     * Title of the page
      *
-     * @return boolean true if feed successfully read
-     * Sends you back to input form if not.
+     * @return string Title of the page
      */
-    function validateFeed()
+
+    function title()
     {
-        $profile_uri = trim($this->arg('profile'));
-
-        if ($profile_uri == '') {
-            $this->showForm(_m('Empty remote profile URL!'));
-            return;
-        }
-        $this->profile_uri = $profile_uri;
-
-        // @fixme validate, normalize bla bla
-        try {
-            $oprofile = Ostatus_profile::ensureProfile($this->profile_uri);
-            $this->oprofile = $oprofile;
-            return true;
-        } catch (FeedSubBadURLException $e) {
-            $err = _m('Invalid URL or could not reach server.');
-        } catch (FeedSubBadResponseException $e) {
-            $err = _m('Cannot read feed; server returned error.');
-        } catch (FeedSubEmptyException $e) {
-            $err = _m('Cannot read feed; server returned an empty page.');
-        } catch (FeedSubBadHTMLException $e) {
-            $err = _m('Bad HTML, could not find feed link.');
-        } catch (FeedSubNoFeedException $e) {
-            $err = _m('Could not find a feed linked from this URL.');
-        } catch (FeedSubUnrecognizedTypeException $e) {
-            $err = _m('Not a recognized feed type.');
-        } catch (FeedSubException $e) {
-            // Any new ones we forgot about
-            $err = sprintf(_m('Bad feed URL: %s %s'), get_class($e), $e->getMessage());
-        }
-
-        $this->showForm($err);
-        return false;
+        return _m('Authorize subscription');
     }
 
-    function saveFeed()
+    /**
+     * Instructions for use
+     *
+     * @return instructions for use
+     */
+
+    function getInstructions()
     {
-        if ($this->validateFeed()) {
-            $this->preview = true;
+        return _m('You can subscribe to users from other supported sites. Paste their address or profile URI below:');
+    }
 
-            // And subscribe the current user to the local profile
-            $user = common_current_user();
-
-            if (!$this->oprofile->subscribe()) {
-                $this->showForm(_m("Failed to set up server-to-server subscription."));
-                return;
-            }
-
-            if ($this->oprofile->isGroup()) {
-                $group = $this->oprofile->localGroup();
-                if ($user->isMember($group)) {
-                    $this->showForm(_m('Already a member!'));
-                } elseif (Group_member::join($this->oprofile->group_id, $user->id)) {
-                    $this->showForm(_m('Joined remote group!'));
-                } else {
-                    $this->showForm(_m('Remote group join failed!'));
-                }
-            } else {
-                $local = $this->oprofile->localProfile();
-                if ($user->isSubscribed($local)) {
-                    $this->showForm(_m('Already subscribed!'));
-                } elseif ($this->oprofile->subscribeLocalToRemote($user)) {
-                    $this->showForm(_m('Remote user subscribed!'));
-                } else {
-                    $this->showForm(_m('Remote subscription failed!'));
-                }
-            }
+    function showPageNotice()
+    {
+        if ($this->error) {
+            $this->element('p', 'error', $this->error);
         }
     }
 
-    function validateAndPreview()
-    {
-        if ($this->validateFeed()) {
-            $this->preview = true;
-            $this->showForm();
-        }
-    }
+    /**
+     * Content area of the page
+     *
+     * Shows a form for associating a remote OStatus account with this
+     * StatusNet account.
+     *
+     * @return void
+     */
 
-    function previewFeed()
+    function showContent()
     {
-        $this->text('Profile preview should go here');
+        if ($this->oprofile) {
+            $this->showPreviewForm();
+        } else {
+            $this->showInputForm();
+        }
     }
 
     function showScripts()

From a306ac39768ff6cbae4f14b565acf2850c979f8b Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Tue, 23 Feb 2010 04:58:58 +0100
Subject: [PATCH 60/97] Added a general classname for remote authorization

---
 theme/default/css/display.css  | 3 +++
 theme/identica/css/display.css | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/theme/default/css/display.css b/theme/default/css/display.css
index 71470d55d2..deb985909e 100644
--- a/theme/default/css/display.css
+++ b/theme/default/css/display.css
@@ -184,6 +184,7 @@ button.close,
 .form_user_unsubscribe input.submit,
 .form_group_join input.submit,
 .form_user_subscribe input.submit,
+.form_remote_authorize input.submit,
 .entity_subscribe a,
 .entity_moderation p,
 .entity_sandbox input.submit,
@@ -291,6 +292,7 @@ background-position:0 1px;
 .form_group_leave input.submit,
 .form_user_subscribe input.submit,
 .form_user_unsubscribe input.submit,
+.form_remote_authorize input.submit,
 .entity_subscribe a {
 background-color:#AAAAAA;
 color:#FFFFFF;
@@ -301,6 +303,7 @@ background-position:5px -1246px;
 }
 .form_group_join input.submit,
 .form_user_subscribe input.submit,
+.form_remote_authorize input.submit,
 .entity_subscribe a {
 background-position:5px -1181px;
 }
diff --git a/theme/identica/css/display.css b/theme/identica/css/display.css
index 14a82a8def..0e54d82e2f 100644
--- a/theme/identica/css/display.css
+++ b/theme/identica/css/display.css
@@ -184,6 +184,7 @@ button.close,
 .form_user_unsubscribe input.submit,
 .form_group_join input.submit,
 .form_user_subscribe input.submit,
+.form_remote_authorize input.submit,
 .entity_subscribe a,
 .entity_moderation p,
 .entity_sandbox input.submit,
@@ -290,6 +291,7 @@ background-position:0 1px;
 .form_group_leave input.submit,
 .form_user_subscribe input.submit,
 .form_user_unsubscribe input.submit,
+.form_remote_authorize input.submit,
 .entity_subscribe a {
 background-color:#AAAAAA;
 color:#FFFFFF;
@@ -300,6 +302,7 @@ background-position:5px -1246px;
 }
 .form_group_join input.submit,
 .form_user_subscribe input.submit,
+.form_remote_authorize input.submit,
 .entity_subscribe a {
 background-position:5px -1181px;
 }

From b67bb182b008b5f7b66d39df7bb8dab449b7002a Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Tue, 23 Feb 2010 04:59:34 +0100
Subject: [PATCH 61/97] Refactored preview info and form for authorizing a
 remote subscription

---
 plugins/OStatus/actions/ostatussub.php | 119 +++++++++++++++++++++----
 1 file changed, 100 insertions(+), 19 deletions(-)

diff --git a/plugins/OStatus/actions/ostatussub.php b/plugins/OStatus/actions/ostatussub.php
index ffa88cb088..206fb309d2 100644
--- a/plugins/OStatus/actions/ostatussub.php
+++ b/plugins/OStatus/actions/ostatussub.php
@@ -87,29 +87,35 @@ class OStatusSubAction extends Action
      */
     function showPreviewForm()
     {
-        $this->elementStart('form', array('method' => 'post',
-                                          'id' => 'form_ostatus_sub',
-                                          'class' => 'form_settings',
-                                          'action' =>
-                                          common_local_url('ostatussub')));
-
-        $this->hidden('token', common_session_token());
-        $this->hidden('profile', $this->profile_uri);
-
-        $this->elementStart('fieldset', array('id' => 'settings_feeds'));
-
         if ($this->oprofile->isGroup()) {
             $this->previewGroup();
-            $this->submit('subscribe', _m('Join'));
         } else {
             $this->previewUser();
-            $this->submit('subscribe', _m('Subscribe'));
         }
 
-
+        $this->elementStart('div', 'entity_actions');
+        $this->elementStart('ul');
+        $this->elementStart('li', 'entity_subscribe');
+        $this->elementStart('form', array('method' => 'post',
+                                          'id' => 'form_ostatus_sub',
+                                          'class' => 'form_remote_authorize',
+                                          'action' =>
+                                          common_local_url('ostatussub')));
+        $this->elementStart('fieldset');
+        $this->hidden('token', common_session_token());
+        $this->hidden('profile', $this->profile_uri);
+        if ($this->oprofile->isGroup()) {
+            $this->submit('submit', _m('Join'), 'submit', null,
+                         _m('Join this group'));
+        } else {
+            $this->submit('submit', _m('Subscribe'), 'submit', null,
+                         _m('Subscribe to this user'));
+        }
         $this->elementEnd('fieldset');
-
         $this->elementEnd('form');
+        $this->elementEnd('li');
+        $this->elementEnd('ul');
+        $this->elementEnd('div');
     }
 
     /**
@@ -120,8 +126,7 @@ class OStatusSubAction extends Action
         $oprofile = $this->oprofile;
         $profile = $oprofile->localProfile();
 
-        $this->text(sprintf(_m("Remote user %s"), $profile->nickname));
-        // ...
+        $this->showEntity($profile);
     }
 
     /**
@@ -132,8 +137,84 @@ class OStatusSubAction extends Action
         $oprofile = $this->oprofile;
         $group = $oprofile->localGroup();
 
-        $this->text(sprintf(_m("Remote group %s"), $group->nickname));
-        // ..
+        $this->showEntity($group);
+    }
+
+
+    function showEntity($entity)
+    {
+        $nickname = $entity->nickname;
+        $profile  = $entity->profileurl;
+        $fullname = $entity->fullname;
+        $homepage = $entity->homepage;
+        $bio      = $entity->bio;
+        $location = $entity->location;
+        $avatar   = $entity->avatarurl;
+
+        $this->elementStart('div', 'entity_profile vcard');
+        $this->elementStart('dl', 'entity_depiction');
+        $this->element('dt', null, _('Photo'));
+        $this->elementStart('dd');
+        if ($avatar) {
+            $this->element('img', array('src' => $avatar,
+                                        'class' => 'photo avatar',
+                                        'width' => AVATAR_PROFILE_SIZE,
+                                        'height' => AVATAR_PROFILE_SIZE,
+                                        'alt' => $nickname));
+        }
+        $this->elementEnd('dd');
+        $this->elementEnd('dl');
+
+        $this->elementStart('dl', 'entity_nickname');
+        $this->element('dt', null, _('Nickname'));
+        $this->elementStart('dd');
+        $hasFN = ($fullname !== '') ? 'nickname' : 'fn nickname';
+        $this->elementStart('a', array('href' => $profile,
+                                       'class' => 'url '.$hasFN));
+        $this->raw($nickname);
+        $this->elementEnd('a');
+        $this->elementEnd('dd');
+        $this->elementEnd('dl');
+
+        if (!is_null($fullname)) {
+            $this->elementStart('dl', 'entity_fn');
+            $this->elementStart('dd');
+            $this->elementStart('span', 'fn');
+            $this->raw($fullname);
+            $this->elementEnd('span');
+            $this->elementEnd('dd');
+            $this->elementEnd('dl');
+        }
+        if (!is_null($location)) {
+            $this->elementStart('dl', 'entity_location');
+            $this->element('dt', null, _('Location'));
+            $this->elementStart('dd', 'label');
+            $this->raw($location);
+            $this->elementEnd('dd');
+            $this->elementEnd('dl');
+        }
+
+        if (!is_null($homepage)) {
+            $this->elementStart('dl', 'entity_url');
+            $this->element('dt', null, _('URL'));
+            $this->elementStart('dd');
+            $this->elementStart('a', array('href' => $homepage,
+                                                'class' => 'url'));
+            $this->raw($homepage);
+            $this->elementEnd('a');
+            $this->elementEnd('dd');
+            $this->elementEnd('dl');
+        }
+
+        if (!is_null($bio)) {
+            $this->elementStart('dl', 'entity_note');
+            $this->element('dt', null, _('Note'));
+            $this->elementStart('dd', 'note');
+            $this->raw($bio);
+            $this->elementEnd('dd');
+            $this->elementEnd('dl');
+        }
+        $this->elementEnd('div');
     }
 
     /**

From cb32b676fa4d7e95ec32c3e8968d0ccddbfa42fa Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Mon, 22 Feb 2010 20:56:11 -0500
Subject: [PATCH 62/97] moving magicsig.php to classes - to add storage

---
 .../OStatus/{lib/magicsig.php => classes/Magicsig.php} | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)
 rename plugins/OStatus/{lib/magicsig.php => classes/Magicsig.php} (97%)

diff --git a/plugins/OStatus/lib/magicsig.php b/plugins/OStatus/classes/Magicsig.php
similarity index 97%
rename from plugins/OStatus/lib/magicsig.php
rename to plugins/OStatus/classes/Magicsig.php
index 50eb301ab3..9d9d327447 100644
--- a/plugins/OStatus/lib/magicsig.php
+++ b/plugins/OStatus/classes/Magicsig.php
@@ -29,15 +29,7 @@
 
 require_once 'Crypt/RSA.php';
 
-interface Magicsig
-{
-
-    public function sign($bytes);
-
-    public function verify($signed, $signature_b64);
-}
-
-class MagicsigRsaSha256
+class Magicsig
 {
 
     public $keypair;

From 74f5c1e16968110caefeeb8431869897f2f8ddfb Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Mon, 22 Feb 2010 22:55:26 -0500
Subject: [PATCH 63/97] db_objectified magic sig - for persistence of local
 keypairs

---
 plugins/OStatus/classes/Magicsig.php | 46 +++++++++++++++++++++++-----
 1 file changed, 39 insertions(+), 7 deletions(-)

diff --git a/plugins/OStatus/classes/Magicsig.php b/plugins/OStatus/classes/Magicsig.php
index 9d9d327447..6d09c54ecb 100644
--- a/plugins/OStatus/classes/Magicsig.php
+++ b/plugins/OStatus/classes/Magicsig.php
@@ -29,21 +29,53 @@
 
 require_once 'Crypt/RSA.php';
 
-class Magicsig
+class Magicsig extends Memcached_DataObject
 {
 
+    public $__table = 'magicsig';
+
+    public $user_id;
     public $keypair;
+    public $alg;
     
-    public function __construct($init = null)
+    private $_rsa;
+
+    public /*static*/ function staticGet($k, $v=null)
     {
-        if (is_null($init)) {
-            $this->generate();
-        } else {
-            $this->fromString($init);
-        }
+        return parent::staticGet(__CLASS__, $k, $v);
     }
 
 
+    function table()
+    {
+        return array(
+            'user_id' => DB_DATAOBJECT_INT,
+            'keypair' => DB_DATAOBJECT_STR + DB_DATAOBJECT_NOTNULL,
+            'alg'     => DB_DATAOBJECT_STR
+        );
+    }
+
+    static function schemaDef()
+    {
+        return array(new ColumnDef('user_id', 'integer',
+                                   null, true, 'PRI'),
+                     new ColumnDef('keypair', 'varchar',
+                                   255, false),
+                     new ColumnDef('alg', 'varchar',
+                                   64, false));
+    }
+
+
+    function keys()
+    {
+        return array_keys($this->keyTypes());
+    }
+
+    function keyTypes()
+    {
+        return array('user_id' => 'K');
+    }
+    
     public function generate($key_length = 512)
     {
         $keypair = new Crypt_RSA_KeyPair($key_length);

From f4b34d67c54022b70185e83fe628c17e3656d91f Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Mon, 22 Feb 2010 23:11:40 -0500
Subject: [PATCH 64/97] generate keypairs for users, and put them in the XRD
 for discovery

---
 plugins/OStatus/OStatusPlugin.php     |  1 +
 plugins/OStatus/actions/webfinger.php | 11 ++++++
 plugins/OStatus/classes/Magicsig.php  | 55 +++++++++++++++++++++------
 3 files changed, 55 insertions(+), 12 deletions(-)

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 472008419a..db4a0af358 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -312,6 +312,7 @@ class OStatusPlugin extends Plugin
         $schema->ensureTable('ostatus_source', Ostatus_source::schemaDef());
         $schema->ensureTable('feedsub', FeedSub::schemaDef());
         $schema->ensureTable('hubsub', HubSub::schemaDef());
+        $schema->ensureTable('magicsig', Magicsig::schemaDef());
         return true;
     }
 
diff --git a/plugins/OStatus/actions/webfinger.php b/plugins/OStatus/actions/webfinger.php
index cf60b8069d..fbbd8d0397 100644
--- a/plugins/OStatus/actions/webfinger.php
+++ b/plugins/OStatus/actions/webfinger.php
@@ -71,6 +71,17 @@ class WebfingerAction extends Action
         $xrd->links[] = array('rel' => 'salmon',
                               'href' => $salmon_url);
 
+        // Get this user's keypair
+        $magickey = Magicsig::staticGet('user_id', $this->user->id);
+        if (!$magickey) {
+            // No keypair yet, let's generate one.
+            $magickey = new Magicsig();
+            $magickey->generate();
+        }
+        
+        $xrd->links[] = array('rel' => Magicsig::PUBLICKEYREL,
+                              'href' => 'data:application/magic-public-key;'. $magickey->keypair);
+        
         // TODO - finalize where the redirect should go on the publisher
         $url = common_local_url('ostatussub') . '?profile={uri}';
         $xrd->links[] = array('rel' => 'http://ostatus.org/schema/1.0/subscribe',
diff --git a/plugins/OStatus/classes/Magicsig.php b/plugins/OStatus/classes/Magicsig.php
index 6d09c54ecb..85664bbf9d 100644
--- a/plugins/OStatus/classes/Magicsig.php
+++ b/plugins/OStatus/classes/Magicsig.php
@@ -32,6 +32,8 @@ require_once 'Crypt/RSA.php';
 class Magicsig extends Memcached_DataObject
 {
 
+    const PUBLICKEYREL = 'magic-public-key';
+    
     public $__table = 'magicsig';
 
     public $user_id;
@@ -40,6 +42,11 @@ class Magicsig extends Memcached_DataObject
     
     private $_rsa;
 
+    public function __construct($alg = 'RSA-SHA256')
+    {
+        $this->alg = $alg;
+    }
+    
     public /*static*/ function staticGet($k, $v=null)
     {
         return parent::staticGet(__CLASS__, $k, $v);
@@ -75,23 +82,33 @@ class Magicsig extends Memcached_DataObject
     {
         return array('user_id' => 'K');
     }
+
+    function insert()
+    {
+        $this->keypair = $this->toString();
+
+        return parent::insert();
+    }
     
     public function generate($key_length = 512)
     {
+        PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
+
         $keypair = new Crypt_RSA_KeyPair($key_length);
         $params['public_key'] = $keypair->getPublicKey();
         $params['private_key'] = $keypair->getPrivateKey();
 
-        PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
-        $this->keypair = new Crypt_RSA($params);
+        $this->_rsa = new Crypt_RSA($params);
         PEAR::popErrorHandling();
+
+        $this->insert();
     }
 
 
     public function toString($full_pair = true)
     {
-        $public_key = $this->keypair->_public_key;
-        $private_key = $this->keypair->_private_key;
+        $public_key = $this->_rsa->_public_key;
+        $private_key = $this->_rsa->_private_key;
 
         $mod = base64_url_encode($public_key->getModulus());
         $exp = base64_url_encode($public_key->getExponent());
@@ -103,10 +120,12 @@ class Magicsig extends Memcached_DataObject
         return 'RSA.' . $mod . '.' . $exp . $private_exp; 
     }
     
-    public function fromString($text)
+    public static function fromString($text)
     {
         PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
 
+        $magic_sig = new Magicsig();
+        
         // remove whitespace
         $text = preg_replace('/\s+/', '', $text);
 
@@ -136,20 +155,32 @@ class Magicsig extends Memcached_DataObject
             }
         }
 
-        $this->keypair = new Crypt_RSA($params);
+        $magic_sig->_rsa = new Crypt_RSA($params);
         PEAR::popErrorHandling();
+
+        return $magic_sig;
     }
 
     public function getName()
     {
-        return 'RSA-SHA256';
+        $this->alg;
     }
 
+    public function getHash()
+    {
+        switch ($this->alg) {
+
+        case 'RSA-SHA256':
+            return 'sha256';
+        }
+
+    }
+    
     public function sign($bytes)
     {
-        $sig = $this->keypair->createSign($bytes, null, 'sha256');
-        if ($this->keypair->isError()) {
-            $error = $this->keypair->getLastError();
+        $sig = $this->_rsa->createSign($bytes, null, 'sha256');
+        if ($this->_rsa->isError()) {
+            $error = $this->_rsa->getLastError();
             common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
         }
 
@@ -158,8 +189,8 @@ class Magicsig extends Memcached_DataObject
 
     public function verify($signed_bytes, $signature)
     {
-        $result =  $this->keypair->validateSign($signed_bytes, $signature, null, 'sha256');
-        if ($this->keypair->isError()) {
+        $result =  $this->_rsa->validateSign($signed_bytes, $signature, null, 'sha256');
+        if ($this->_rsa->isError()) {
             $error = $this->keypair->getLastError();
             //common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
             print $error->getMessage();

From cd561657c2bea873f6916cec0e957a9973fa990e Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Mon, 22 Feb 2010 23:28:15 -0500
Subject: [PATCH 65/97] missing return value check

---
 plugins/OStatus/lib/webfinger.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/plugins/OStatus/lib/webfinger.php b/plugins/OStatus/lib/webfinger.php
index 0386881d14..8a50376294 100644
--- a/plugins/OStatus/lib/webfinger.php
+++ b/plugins/OStatus/lib/webfinger.php
@@ -108,6 +108,10 @@ class Webfinger
 
         $content = $this->fetchURL($url);
 
+        if (!$content) {
+            return false;
+        }
+
         return XRD::parse($content);
     }
 

From 17b8020d2585ce248d12ad1a2b8f57a4ab250f82 Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Mon, 22 Feb 2010 23:30:05 -0500
Subject: [PATCH 66/97] clean up error logging

---
 plugins/OStatus/classes/Magicsig.php | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/plugins/OStatus/classes/Magicsig.php b/plugins/OStatus/classes/Magicsig.php
index 85664bbf9d..c9f6182b5b 100644
--- a/plugins/OStatus/classes/Magicsig.php
+++ b/plugins/OStatus/classes/Magicsig.php
@@ -89,7 +89,7 @@ class Magicsig extends Memcached_DataObject
 
         return parent::insert();
     }
-    
+
     public function generate($key_length = 512)
     {
         PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
@@ -143,15 +143,15 @@ class Magicsig extends Memcached_DataObject
         $params['public_key'] = new Crypt_RSA_KEY($mod, $exp, 'public');
         if ($params['public_key']->isError()) {
             $error = $params['public_key']->getLastError();
-            print $error->getMessage();
-            exit;
+            common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
+            return false;
         }
         if ($private_exp) {
             $params['private_key'] = new Crypt_RSA_KEY($mod, $private_exp, 'private');
             if ($params['private_key']->isError()) {
                 $error = $params['private_key']->getLastError();
-                print $error->getMessage();
-                exit;
+                common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
+                return false;
             }
         }
 
@@ -182,6 +182,7 @@ class Magicsig extends Memcached_DataObject
         if ($this->_rsa->isError()) {
             $error = $this->_rsa->getLastError();
             common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
+            return false;
         }
 
         return $sig;
@@ -192,8 +193,8 @@ class Magicsig extends Memcached_DataObject
         $result =  $this->_rsa->validateSign($signed_bytes, $signature, null, 'sha256');
         if ($this->_rsa->isError()) {
             $error = $this->keypair->getLastError();
-            //common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
-            print $error->getMessage();
+            common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
+            return false;
         }
         return $result;
     }

From 9494b0e5d79601b339bf28967a65ffdfe9458532 Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Mon, 22 Feb 2010 23:30:21 -0500
Subject: [PATCH 67/97] magicsig shuffling

---
 plugins/OStatus/lib/magicenvelope.php | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/plugins/OStatus/lib/magicenvelope.php b/plugins/OStatus/lib/magicenvelope.php
index 1ae80d70c1..81f4609c5c 100644
--- a/plugins/OStatus/lib/magicenvelope.php
+++ b/plugins/OStatus/lib/magicenvelope.php
@@ -27,8 +27,6 @@
  * @link      http://status.net/
  */
 
-require_once 'magicsig.php';
-
 class MagicEnvelope
 {
     const ENCODING = 'base64url';
@@ -64,7 +62,7 @@ class MagicEnvelope
             return false;
         }
 
-        $signature_alg = new MagicsigRsaSha256($this->getKeyPair($signer_uri));
+        $signature_alg = Magicsig::fromString($this->getKeyPair($signer_uri));
         $armored_text = base64_encode($text);
 
         return array(
@@ -139,7 +137,7 @@ class MagicEnvelope
         $text = base64_decode($env['data']);
         $signer_uri = $this->getAuthor($text);
 
-        $verifier = new MagicsigRsaSha256($this->getKeyPair($signer_uri));
+        $verifier = Magicsig::fromString($this->getKeyPair($signer_uri));
 
         return $verifier->verify($env['data'], $env['sig']);
     }

From 1fe031844c136d503074e23e0d0a50056dc224dc Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Mon, 22 Feb 2010 23:44:33 -0500
Subject: [PATCH 68/97] er typo

---
 plugins/OStatus/classes/Magicsig.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/OStatus/classes/Magicsig.php b/plugins/OStatus/classes/Magicsig.php
index c9f6182b5b..681aec184d 100644
--- a/plugins/OStatus/classes/Magicsig.php
+++ b/plugins/OStatus/classes/Magicsig.php
@@ -163,7 +163,7 @@ class Magicsig extends Memcached_DataObject
 
     public function getName()
     {
-        $this->alg;
+        return $this->alg;
     }
 
     public function getHash()

From 1bffe424131dfa2c7a85fd9cf782e8c806326bbe Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Tue, 23 Feb 2010 08:38:23 -0500
Subject: [PATCH 69/97] Drop user-only requirement for subscribe action

I removed the check for local users in the subscribe button. I replaced
it with a more specific check for OMB 0.1 remote profiles, which you
can't use with this action.

I also took the opportunity to split the handle() method into
prepare() and handle(), and added PHPCS clean documentation.
---
 actions/subscribe.php | 132 +++++++++++++++++++++++++++++++++---------
 1 file changed, 104 insertions(+), 28 deletions(-)

diff --git a/actions/subscribe.php b/actions/subscribe.php
index a90d7facdf..3745311b66 100644
--- a/actions/subscribe.php
+++ b/actions/subscribe.php
@@ -1,7 +1,9 @@
 <?php
-/*
+/**
  * StatusNet - the distributed open-source microblogging tool
- * Copyright (C) 2008, 2009, StatusNet, Inc.
+ * Copyright (C) 2008-2010, StatusNet, Inc.
+ *
+ * Subscription action.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
@@ -15,68 +17,142 @@
  *
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * PHP version 5
+ *
+ * @category  Action
+ * @package   StatusNet
+ * @author    Evan Prodromou <evan@status.net>
+ * @copyright 2008-2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
+ * @link      http://status.net/
  */
 
-if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
+if (!defined('STATUSNET')) {
+    exit(1);
+}
+
+/**
+ * Subscription action
+ *
+ * Subscribing to a profile. Does not work for OMB 0.1 remote subscriptions,
+ * but may work for other remote subscription protocols, like OStatus.
+ *
+ * Takes parameters:
+ *
+ *    - subscribeto: a profile ID
+ *    - token: session token to prevent CSRF attacks
+ *    - ajax: boolean; whether to return Ajax or full-browser results
+ *
+ * Only works if the current user is logged in.
+ *
+ * @category  Action
+ * @package   StatusNet
+ * @author    Evan Prodromou <evan@status.net>
+ * @copyright 2008-2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
+ * @link      http://status.net/
+ */
 
 class SubscribeAction extends Action
 {
+    var $user;
+    var $other;
 
-    function handle($args)
+    /**
+     * Check pre-requisites and instantiate attributes
+     *
+     * @param Array $args array of arguments (URL, GET, POST)
+     *
+     * @return boolean success flag
+     */
+
+    function prepare($args)
     {
-        parent::handle($args);
+        parent::prepare($args);
 
-        if (!common_logged_in()) {
-            $this->clientError(_('Not logged in.'));
-            return;
-        }
-
-        $user = common_current_user();
+        // Only allow POST requests
 
         if ($_SERVER['REQUEST_METHOD'] != 'POST') {
-            common_redirect(common_local_url('subscriptions', array('nickname' => $user->nickname)));
-            return;
+            $this->clientError(_('This action only accepts POST requests.'));
+            return false;
         }
 
-        # CSRF protection
+        // CSRF protection
 
         $token = $this->trimmed('token');
 
         if (!$token || $token != common_session_token()) {
-            $this->clientError(_('There was a problem with your session token. Try again, please.'));
-            return;
+            $this->clientError(_('There was a problem with your session token.'.
+                                 ' Try again, please.'));
+            return false;
         }
 
+        // Only for logged-in users
+
+        $this->user = common_current_user();
+
+        if (empty($this->user)) {
+            $this->clientError(_('Not logged in.'));
+            return false;
+        }
+
+        // Profile to subscribe to
+
         $other_id = $this->arg('subscribeto');
 
-        $other = User::staticGet('id', $other_id);
+        $this->other = Profile::staticGet('id', $other_id);
 
-        if (!$other) {
-            $this->clientError(_('Not a local user.'));
-            return;
+        if (empty($this->other)) {
+            $this->clientError(_('No such profile.'));
+            return false;
         }
 
-        $result = subs_subscribe_to($user, $other);
+        // OMB 0.1 doesn't have a mechanism for local-server-
+        // originated subscription.
 
-        if (is_string($result)) {
-            $this->clientError($result);
-            return;
+        $omb01 = Remote_profile::staticGet('id', $other_id);
+
+        if (!empty($omb01)) {
+            $this->clientError(_('You cannot subscribe to an OMB 0.1'.
+                                 ' remote profile with this action.'));
+            return false;
         }
 
+        return true;
+    }
+
+    /**
+     * Handle request
+     *
+     * Does the subscription and returns results.
+     *
+     * @param Array $args unused.
+     *
+     * @return void
+     */
+
+    function handle($args)
+    {
+        // Throws exception on error
+
+        Subscription::start($this->user->getProfile(),
+                            $this->other);
+
         if ($this->boolean('ajax')) {
             $this->startHTML('text/xml;charset=utf-8');
             $this->elementStart('head');
             $this->element('title', null, _('Subscribed'));
             $this->elementEnd('head');
             $this->elementStart('body');
-            $unsubscribe = new UnsubscribeForm($this, $other->getProfile());
+            $unsubscribe = new UnsubscribeForm($this, $this->other->getProfile());
             $unsubscribe->show();
             $this->elementEnd('body');
             $this->elementEnd('html');
         } else {
-            common_redirect(common_local_url('subscriptions', array('nickname' =>
-                                                                $user->nickname)),
-                            303);
+            $url = common_local_url('subscriptions',
+                                    array('nickname' => $this->user->nickname));
+            common_redirect($url, 303);
         }
     }
 }

From e070fcaaae3e6ac1fef1f9b066c5335fddb9376b Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Tue, 23 Feb 2010 11:37:49 -0800
Subject: [PATCH 70/97] OStatus: fix for avatars, submit button in updated
 remote profile preview

---
 plugins/OStatus/actions/ostatussub.php | 42 +++++++++++++++-----------
 1 file changed, 25 insertions(+), 17 deletions(-)

diff --git a/plugins/OStatus/actions/ostatussub.php b/plugins/OStatus/actions/ostatussub.php
index 206fb309d2..0d786fac90 100644
--- a/plugins/OStatus/actions/ostatussub.php
+++ b/plugins/OStatus/actions/ostatussub.php
@@ -126,7 +126,13 @@ class OStatusSubAction extends Action
         $oprofile = $this->oprofile;
         $profile = $oprofile->localProfile();
 
-        $this->showEntity($profile);
+        $avatar = $profile->getAvatar(AVATAR_PROFILE_SIZE);
+        $avatarUrl = $avatar ? $avatar->displayUrl() : false;
+
+        $this->showEntity($profile,
+                          $profile->profileurl,
+                          $avatarUrl,
+                          $profile->bio);
     }
 
     /**
@@ -137,31 +143,33 @@ class OStatusSubAction extends Action
         $oprofile = $this->oprofile;
         $group = $oprofile->localGroup();
 
-        $this->showEntity($group);
+        $this->showEntity($group,
+                          $group->getProfileUrl(),
+                          $group->homepage_logo,
+                          $group->description);
     }
 
 
-    function showEntity($entity)
+    function showEntity($entity, $profile, $avatar, $note)
     {
         $nickname = $entity->nickname;
-        $profile  = $entity->profileurl;
         $fullname = $entity->fullname;
         $homepage = $entity->homepage;
-        $bio      = $entity->bio;
         $location = $entity->location;
-        $avatar   = $entity->avatarurl;
+        
+        if (!$avatar) {
+            $avatar = Avatar::defaultImage(AVATAR_PROFILE_SIZE);
+        }
 
         $this->elementStart('div', 'entity_profile vcard');
         $this->elementStart('dl', 'entity_depiction');
         $this->element('dt', null, _('Photo'));
         $this->elementStart('dd');
-        if ($avatar) {
-            $this->element('img', array('src' => $avatar,
-                                        'class' => 'photo avatar',
-                                        'width' => AVATAR_PROFILE_SIZE,
-                                        'height' => AVATAR_PROFILE_SIZE,
-                                        'alt' => $nickname));
-        }
+        $this->element('img', array('src' => $avatar,
+                                    'class' => 'photo avatar',
+                                    'width' => AVATAR_PROFILE_SIZE,
+                                    'height' => AVATAR_PROFILE_SIZE,
+                                    'alt' => $nickname));
         $this->elementEnd('dd');
         $this->elementEnd('dl');
 
@@ -206,11 +214,11 @@ class OStatusSubAction extends Action
             $this->elementEnd('dl');
         }
 
-        if (!is_null($bio)) {
+        if (!is_null($note)) {
             $this->elementStart('dl', 'entity_note');
             $this->element('dt', null, _('Note'));
             $this->elementStart('dd', 'note');
-            $this->raw($bio);
+            $this->raw($note);
             $this->elementEnd('dd');
             $this->elementEnd('dl');
         }
@@ -368,7 +376,7 @@ class OStatusSubAction extends Action
         }
 
         if ($this->validateFeed()) {
-            if ($this->arg('subscribe')) {
+            if ($this->arg('submit')) {
                 $this->saveFeed();
                 return;
             }
@@ -424,7 +432,7 @@ class OStatusSubAction extends Action
 
     function showPageNotice()
     {
-        if ($this->error) {
+        if (!empty($this->error)) {
             $this->element('p', 'error', $this->error);
         }
     }

From c79c70ea2c2dadafa72c65dc4593a66fecb070e3 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Tue, 23 Feb 2010 11:56:17 -0800
Subject: [PATCH 71/97] OStatus subscription UI tweak: if we're already
 subscribed/joined, say so and don't offer a 'subscribe'/'join' button on the
 profile preview page.

---
 plugins/OStatus/actions/ostatussub.php | 30 ++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/plugins/OStatus/actions/ostatussub.php b/plugins/OStatus/actions/ostatussub.php
index 0d786fac90..df9aa80b01 100644
--- a/plugins/OStatus/actions/ostatussub.php
+++ b/plugins/OStatus/actions/ostatussub.php
@@ -88,9 +88,13 @@ class OStatusSubAction extends Action
     function showPreviewForm()
     {
         if ($this->oprofile->isGroup()) {
-            $this->previewGroup();
+            $ok = $this->previewGroup();
         } else {
-            $this->previewUser();
+            $ok = $this->previewUser();
+        }
+        if (!$ok) {
+            // @fixme maybe provide a cancel button or link back?
+            return;
         }
 
         $this->elementStart('div', 'entity_actions');
@@ -120,12 +124,22 @@ class OStatusSubAction extends Action
 
     /**
      * Show a preview for a remote user's profile
+     * @return boolean true if we're ok to try subscribing
      */
     function previewUser()
     {
         $oprofile = $this->oprofile;
         $profile = $oprofile->localProfile();
 
+        $cur = common_current_user();
+        if ($cur->isSubscribed($profile)) {
+            $this->element('div', array('class' => 'error'),
+                           _m("You are already subscribed to this user."));
+            $ok = false;
+        } else {
+            $ok = true;
+        }
+
         $avatar = $profile->getAvatar(AVATAR_PROFILE_SIZE);
         $avatarUrl = $avatar ? $avatar->displayUrl() : false;
 
@@ -133,20 +147,32 @@ class OStatusSubAction extends Action
                           $profile->profileurl,
                           $avatarUrl,
                           $profile->bio);
+        return $ok;
     }
 
     /**
      * Show a preview for a remote group's profile
+     * @return boolean true if we're ok to try joining
      */
     function previewGroup()
     {
         $oprofile = $this->oprofile;
         $group = $oprofile->localGroup();
 
+        $cur = common_current_user();
+        if ($cur->isMember($group)) {
+            $this->element('div', array('class' => 'error'),
+                           _m("You are already a member of this group."));
+            $ok = false;
+        } else {
+            $ok = true;
+        }
+
         $this->showEntity($group,
                           $group->getProfileUrl(),
                           $group->homepage_logo,
                           $group->description);
+        return $ok;
     }
 
 

From 90d34b26c66ceb5d37a9c2782356b46361a523cc Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Tue, 23 Feb 2010 20:44:27 +0000
Subject: [PATCH 72/97] OStatus: do PuSH subscription setup from subscribe/join
 event hooks, so resubscribing directly from a profile/group list works
 correctly if there aren't active subscriptions at the moment.

---
 lib/activity.php                            |   4 +-
 plugins/OStatus/OStatusPlugin.php           | 158 ++++++++++++--------
 plugins/OStatus/actions/ostatussub.php      |   5 -
 plugins/OStatus/classes/Ostatus_profile.php |  26 +++-
 4 files changed, 127 insertions(+), 66 deletions(-)

diff --git a/lib/activity.php b/lib/activity.php
index 3689dac385..04c57c561c 100644
--- a/lib/activity.php
+++ b/lib/activity.php
@@ -823,7 +823,9 @@ class Activity
         if ($namespace) {
             $attrs = array('xmlns' => 'http://www.w3.org/2005/Atom',
                            'xmlns:activity' => 'http://activitystrea.ms/spec/1.0/',
-                           'xmlns:ostatus' => 'http://ostatus.org/schema/1.0');
+                           'xmlns:georss' => 'http://www.georss.org/georss',
+                           'xmlns:ostatus' => 'http://ostatus.org/schema/1.0',
+                           'xmlns:poco' => 'http://portablecontacts.net/spec/1.0');
         } else {
             $attrs = array();
         }
diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index db4a0af358..629645767f 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -251,58 +251,6 @@ class OStatusPlugin extends Plugin
         return true;
     }
 
-    /**
-     * Notify remote server and garbage collect unused feeds on unsubscribe.
-     * @fixme send these operations to background queues
-     *
-     * @param User $user
-     * @param Profile $other
-     * @return hook return value
-     */
-    function onEndUnsubscribe($profile, $other)
-    {
-        $user = User::staticGet('id', $profile->id);
-
-        if (empty($user)) {
-            return true;
-        }
-
-        $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
-
-        if (empty($oprofile)) {
-            return true;
-        }
-
-        // Drop the PuSH subscription if there are no other subscribers.
-
-        if ($other->subscriberCount() == 0) {
-            common_log(LOG_INFO, "Unsubscribing from now-unused feed $oprofile->feeduri");
-            $oprofile->unsubscribe();
-        }
-
-        $act = new Activity();
-
-        $act->verb = ActivityVerb::UNFOLLOW;
-
-        $act->id   = TagURI::mint('unfollow:%d:%d:%s',
-                                  $profile->id,
-                                  $other->id,
-                                  common_date_iso8601(time()));
-
-        $act->time    = time();
-        $act->title   = _("Unfollow");
-        $act->content = sprintf(_("%s stopped following %s."),
-                               $profile->getBestName(),
-                               $other->getBestName());
-
-        $act->actor   = ActivityObject::fromProfile($profile);
-        $act->object  = ActivityObject::fromProfile($other);
-
-        $oprofile->notifyActivity($act);
-
-        return true;
-    }
-
     /**
      * Make sure necessary tables are filled out.
      */
@@ -366,6 +314,50 @@ class OStatusPlugin extends Plugin
         }
     }
 
+    /**
+     * When about to subscribe to a remote user, start a server-to-server
+     * PuSH subscription if needed. If we can't establish that, abort.
+     *
+     * @fixme If something else aborts later, we could end up with a stray
+     *        PuSH subscription. This is relatively harmless, though.
+     *
+     * @param Profile $subscriber
+     * @param Profile $other
+     *
+     * @return hook return code
+     *
+     * @throws Exception
+     */
+    function onStartSubscribe($subscriber, $other)
+    {
+        $user = User::staticGet('id', $subscriber->id);
+
+        if (empty($user)) {
+            return true;
+        }
+
+        $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
+
+        if (empty($oprofile)) {
+            return true;
+        }
+
+        if (!$oprofile->subscribe()) {
+            throw new Exception(_m('Could not set up remote subscription.'));
+        }
+    }
+
+    /**
+     * Having established a remote subscription, send a notification to the
+     * remote OStatus profile's endpoint.
+     *
+     * @param Profile $subscriber
+     * @param Profile $other
+     *
+     * @return hook return code
+     *
+     * @throws Exception
+     */
     function onEndSubscribe($subscriber, $other)
     {
         $user = User::staticGet('id', $subscriber->id);
@@ -403,6 +395,54 @@ class OStatusPlugin extends Plugin
         return true;
     }
 
+    /**
+     * Notify remote server and garbage collect unused feeds on unsubscribe.
+     * @fixme send these operations to background queues
+     *
+     * @param User $user
+     * @param Profile $other
+     * @return hook return value
+     */
+    function onEndUnsubscribe($profile, $other)
+    {
+        $user = User::staticGet('id', $profile->id);
+
+        if (empty($user)) {
+            return true;
+        }
+
+        $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
+
+        if (empty($oprofile)) {
+            return true;
+        }
+
+        // Drop the PuSH subscription if there are no other subscribers.
+        $oprofile->garbageCollect();
+
+        $act = new Activity();
+
+        $act->verb = ActivityVerb::UNFOLLOW;
+
+        $act->id   = TagURI::mint('unfollow:%d:%d:%s',
+                                  $profile->id,
+                                  $other->id,
+                                  common_date_iso8601(time()));
+
+        $act->time    = time();
+        $act->title   = _("Unfollow");
+        $act->content = sprintf(_("%s stopped following %s."),
+                               $profile->getBestName(),
+                               $other->getBestName());
+
+        $act->actor   = ActivityObject::fromProfile($profile);
+        $act->object  = ActivityObject::fromProfile($other);
+
+        $oprofile->notifyActivity($act);
+
+        return true;
+    }
+
     /**
      * When one of our local users tries to join a remote group,
      * notify the remote server. If the notification is rejected,
@@ -418,6 +458,10 @@ class OStatusPlugin extends Plugin
     {
         $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
         if ($oprofile) {
+            if (!$oprofile->subscribe()) {
+                throw new Exception(_m('Could not set up remote group membership.'));
+            }
+
             $member = Profile::staticGet($user->id);
 
             $act = new Activity();
@@ -439,7 +483,8 @@ class OStatusPlugin extends Plugin
             if ($oprofile->notifyActivity($act)) {
                 return true;
             } else {
-                throw new ServerException(_m("Failed joining remote group."));
+                $oprofile->garbageCollect();
+                throw new Exception(_m("Failed joining remote group."));
             }
         }
     }
@@ -464,12 +509,7 @@ class OStatusPlugin extends Plugin
         $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
         if ($oprofile) {
             // Drop the PuSH subscription if there are no other subscribers.
-    
-            $members = $group->getMembers(0, 1);
-            if ($members->N == 0) {
-                common_log(LOG_INFO, "Unsubscribing from now-unused group feed $oprofile->feeduri");
-                $oprofile->unsubscribe();
-            }
+            $oprofile->garbageCollect();
 
 
             $member = Profile::staticGet($user->id);
diff --git a/plugins/OStatus/actions/ostatussub.php b/plugins/OStatus/actions/ostatussub.php
index df9aa80b01..b3569e6951 100644
--- a/plugins/OStatus/actions/ostatussub.php
+++ b/plugins/OStatus/actions/ostatussub.php
@@ -324,11 +324,6 @@ class OStatusSubAction extends Action
         // And subscribe the current user to the local profile
         $user = common_current_user();
 
-        if (!$this->oprofile->subscribe()) {
-            $this->showForm(_m("Failed to set up server-to-server subscription."));
-            return;
-        }
-
         if ($this->oprofile->isGroup()) {
             $group = $this->oprofile->localGroup();
             if ($user->isMember($group)) {
diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index e8cc13c6c1..91b957fa23 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -346,6 +346,29 @@ class Ostatus_profile extends Memcached_DataObject
         }
     }
 
+    /**
+     * Check if this remote profile has any active local subscriptions, and
+     * if not drop the PuSH subscription feed.
+     *
+     * @return boolean
+     */
+    public function garbageCollect()
+    {
+        if ($this->isGroup()) {
+            $members = $this->localGroup()->getMembers(0, 1);
+            $count = $members->N;
+        } else {
+            $count = $this->localProfile()->subscriberCount();
+        }
+        if ($count == 0) {
+            common_log(LOG_INFO, "Unsubscribing from now-unused remote feed $oprofile->feeduri");
+            $this->unsubscribe();
+            return true;
+        } else {
+            return false;
+        }
+    }
+
     /**
      * Send an Activity Streams notification to the remote Salmon endpoint,
      * if so configured.
@@ -379,7 +402,8 @@ class Ostatus_profile extends Memcached_DataObject
                                 'xmlns:activity' => 'http://activitystrea.ms/spec/1.0/',
                                 'xmlns:thr' => 'http://purl.org/syndication/thread/1.0',
                                 'xmlns:georss' => 'http://www.georss.org/georss',
-                                'xmlns:ostatus' => 'http://ostatus.org/schema/1.0');
+                                'xmlns:ostatus' => 'http://ostatus.org/schema/1.0',
+                                'xmlns:poco' => 'http://portablecontacts.net/spec/1.0');
 
             $entry = new XMLStringer();
             $entry->elementStart('entry', $attributes);

From a0c255e231a84cf77554cc3c0a095eae7b0ffd9c Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Tue, 23 Feb 2010 15:59:10 -0500
Subject: [PATCH 73/97] move mention detection before default in OStatusPlugin

---
 plugins/OStatus/OStatusPlugin.php | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index db4a0af358..679857f897 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -224,7 +224,7 @@ class OStatusPlugin extends Plugin
      *
      */
 
-    function onEndFindMentions($sender, $text, &$mentions)
+    function onStartFindMentions($sender, $text, &$mentions)
     {
         preg_match_all('/(?:^|\s+)@((?:\w+\.)*\w+@(?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+)/',
                        $text,
@@ -464,14 +464,13 @@ class OStatusPlugin extends Plugin
         $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
         if ($oprofile) {
             // Drop the PuSH subscription if there are no other subscribers.
-    
+
             $members = $group->getMembers(0, 1);
             if ($members->N == 0) {
                 common_log(LOG_INFO, "Unsubscribing from now-unused group feed $oprofile->feeduri");
                 $oprofile->unsubscribe();
             }
 
-
             $member = Profile::staticGet($user->id);
 
             $act = new Activity();

From 5f9a8ca64bee5247358238c26b4f54003337d11b Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Tue, 23 Feb 2010 21:11:44 +0000
Subject: [PATCH 74/97] OStatus: accept webfinger addresses as well as profile
 URLs in the explicit remote subscribe form.

---
 plugins/OStatus/actions/ostatussub.php | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/plugins/OStatus/actions/ostatussub.php b/plugins/OStatus/actions/ostatussub.php
index b3569e6951..12832cdcfb 100644
--- a/plugins/OStatus/actions/ostatussub.php
+++ b/plugins/OStatus/actions/ostatussub.php
@@ -288,10 +288,15 @@ class OStatusSubAction extends Action
         }
         $this->profile_uri = $profile_uri;
 
-        // @fixme validate, normalize bla bla
         try {
-            $oprofile = Ostatus_profile::ensureProfile($this->profile_uri);
-            $this->oprofile = $oprofile;
+            if (Validate::email($this->profile_uri)) {
+                $this->oprofile = Ostatus_profile::ensureWebfinger($this->profile_uri);
+            } else if (Validate::uri($this->profile_uri)) {
+                $this->oprofile = Ostatus_profile::ensureProfile($this->profile_uri);
+            } else {
+                $this->error = _m("Invalid address format.");
+                return false;
+            }
             return true;
         } catch (FeedSubBadURLException $e) {
             $this->error = _m('Invalid URL or could not reach server.');

From f5ec7c27070dac4ac28ba860f4cc9a808b5f7c30 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Tue, 23 Feb 2010 16:13:24 -0500
Subject: [PATCH 75/97] some logging for OStatusPlugin::onStartFindMentions()

---
 plugins/OStatus/OStatusPlugin.php | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 3a9e77c2a6..934c858ac1 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -235,9 +235,17 @@ class OStatusPlugin extends Plugin
 
             $webfinger = $wmatch[0];
 
+            $this->log(LOG_INFO, "Checking Webfinger for address '$webfinger'");
+
             $oprofile = Ostatus_profile::ensureWebfinger($webfinger);
 
-            if (!empty($oprofile)) {
+            if (empty($oprofile)) {
+
+                $this->log(LOG_INFO, "No Ostatus_profile found for address '$webfinger'");
+
+            } else {
+
+                $this->log(LOG_INFO, "Ostatus_profile found for address '$webfinger'");
 
                 $profile = $oprofile->localProfile();
 

From d6ad7332475f1cc4ab45d55fc04ef491d5f3999d Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Tue, 23 Feb 2010 21:47:14 +0000
Subject: [PATCH 76/97] OStatus: fixes for link/id and text extraction gets
 import of Buzz feeds working.

---
 plugins/OStatus/OStatusPlugin.php           | 24 +++++++++++----------
 plugins/OStatus/classes/Ostatus_profile.php | 17 ++++++++++++---
 2 files changed, 27 insertions(+), 14 deletions(-)

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 3a9e77c2a6..724634924d 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -287,13 +287,19 @@ class OStatusPlugin extends Plugin
     function onStartNoticeSourceLink($notice, &$name, &$url, &$title)
     {
         if ($notice->source == 'ostatus') {
-            $bits = parse_url($notice->uri);
-            $domain = $bits['host'];
+            if ($notice->url) {
+                $bits = parse_url($notice->url);
+                $domain = $bits['host'];
+                if (substr($domain, 0, 4) == 'www.') {
+                    $name = substr($domain, 4);
+                } else {
+                    $name = $domain;
+                }
 
-            $name = $domain;
-            $url = $notice->uri;
-            $title = sprintf(_m("Sent from %s via OStatus"), $domain);
-            return false;
+                $url = $notice->url;
+                $title = sprintf(_m("Sent from %s via OStatus"), $domain);
+                return false;
+            }
         }
     }
 
@@ -509,12 +515,8 @@ class OStatusPlugin extends Plugin
         $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
         if ($oprofile) {
             // Drop the PuSH subscription if there are no other subscribers.
+            $oprofile->garbageCollect();
 
-            $members = $group->getMembers(0, 1);
-            if ($members->N == 0) {
-                common_log(LOG_INFO, "Unsubscribing from now-unused group feed $oprofile->feeduri");
-                $oprofile->unsubscribe();
-            }
 
             $member = Profile::staticGet($user->id);
 
diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 91b957fa23..4998809bc8 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -556,17 +556,28 @@ class Ostatus_profile extends Memcached_DataObject
 
         if ($activity->object->link) {
             $sourceUrl = $activity->object->link;
+        } else if ($activity->link) {
+            $sourceUrl = $activity->link;
         } else if (preg_match('!^https?://!', $activity->object->id)) {
             $sourceUrl = $activity->object->id;
         }
 
-        // @fixme sanitize and save HTML content if available
+        // Get (safe!) HTML and text versions of the content
 
-        $content = $activity->object->title;
+        require_once(INSTALLDIR.'/extlib/HTMLPurifier/HTMLPurifier.auto.php');
+
+        $html = $activity->object->content;
+
+        $purifier = new HTMLPurifier();
+
+        $rendered = $purifier->purify($html);
+
+        $content = html_entity_decode(strip_tags($rendered));
 
         $params = array('is_local' => Notice::REMOTE_OMB,
                         'url' => $sourceUrl,
-                        'uri' => $sourceUri);
+                        'uri' => $sourceUri,
+                        'rendered' => $rendered);
 
         $location = $activity->context->location;
 

From fa178a8aa7d6e5ade76eef12ac0ca49aa10f5cdc Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@status.net>
Date: Tue, 23 Feb 2010 14:26:34 -0800
Subject: [PATCH 77/97] Add poco:displayName to Atom output for person object

---
 lib/activity.php | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/activity.php b/lib/activity.php
index 04c57c561c..853741a9a1 100644
--- a/lib/activity.php
+++ b/lib/activity.php
@@ -104,6 +104,7 @@ class PoCo
     function __construct($profile)
     {
         $this->preferredUsername = $profile->nickname;
+        $this->displayName       = $profile->getBestName();
 
         $this->note    = $profile->bio;
         $this->address = new PoCoAddress($profile->location);
@@ -129,6 +130,12 @@ class PoCo
             $this->preferredUsername
         );
 
+        $xs->element(
+            'poco:displayName',
+            null,
+            $this->displayName
+        );
+
         if (!empty($this->note)) {
             $xs->element('poco:note', null, $this->note);
         }

From 391b45949f6fabef0427aa99d4123fe6ef5ef49d Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Tue, 23 Feb 2010 18:25:31 -0500
Subject: [PATCH 78/97] adding xfn, foaf and hcard rel's to our webfinger
 output

---
 plugins/OStatus/actions/webfinger.php | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/plugins/OStatus/actions/webfinger.php b/plugins/OStatus/actions/webfinger.php
index fbbd8d0397..34336a9039 100644
--- a/plugins/OStatus/actions/webfinger.php
+++ b/plugins/OStatus/actions/webfinger.php
@@ -65,6 +65,21 @@ class WebfingerAction extends Action
                                                                'format' => 'atom')),
                               'type' => 'application/atom+xml');
 
+        // hCard
+        $xrd->links[] = array('rel' => 'http://microformats.org/profile/hcard',
+                              'type' => 'text/html',
+                              'href' => common_profile_url($nick));
+
+        // XFN
+        $xrd->links[] = array('rel' => 'http://gmpg.org/xfn/11',
+                              'type' => 'text/html',
+                              'href' => common_profile_url($nick));
+        // FOAF
+        $xrd->links[] = array('rel' => 'describedby',
+                              'type' => 'application/rdf+xml',
+                              'href' => common_local_url('foaf',
+                                                         array('nickname' => $nick)));                        
+        
         $salmon_url = common_local_url('salmon',
                                        array('id' => $this->user->id));
 

From 25864aea9dd81ebcdb8c7386af3662eda800ccc3 Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Wed, 24 Feb 2010 00:59:00 +0100
Subject: [PATCH 79/97] Using the default abbr class pattern for geo
 microformats instead of the shorthand that I've proposed at
 http://microformats.org/wiki/geo-brainstorming#latitude_longitude_shorthand_and_geo_link

If anyone wants to pick up on where the discussion was left off or
get more implementation support by other sites and software, and be
recognized by parsers, I'd be happy to go back to the shorthand.
Because you know, it actually makes a lot of sense.
---
 lib/noticelist.php | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/noticelist.php b/lib/noticelist.php
index 837cb90faa..dcf17be08c 100644
--- a/lib/noticelist.php
+++ b/lib/noticelist.php
@@ -438,14 +438,15 @@ class NoticeListItem extends Widget
         $this->out->text(_('at'));
         $this->out->text(' ');
         if (empty($url)) {
-            $this->out->element('span', array('class' => 'geo',
+            $this->out->element('abbr', array('class' => 'geo',
                                               'title' => $latlon),
                                 $name);
         } else {
-            $this->out->element('a', array('class' => 'geo',
-                                           'title' => $latlon,
-                                           'href' => $url),
+            $this->out->elementStart('a', array('href' => $url));
+            $this->out->element('abbr', array('class' => 'geo',
+                                              'title' => $latlon),
                                 $name);
+            $this->out->elementEnd('a');
         }
         $this->out->elementEnd('span');
     }

From 2aaf8d4e308d49d072a6c43e43cb99c373deca2e Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Wed, 24 Feb 2010 01:09:12 +0000
Subject: [PATCH 80/97] Add class and (if present) id to DB_DataObject error
 exceptions; often they're VERRRRRY vague, and it helps to know what type of
 item is failing!

---
 classes/Memcached_DataObject.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/classes/Memcached_DataObject.php b/classes/Memcached_DataObject.php
index 40576dc717..bc4c3a000c 100644
--- a/classes/Memcached_DataObject.php
+++ b/classes/Memcached_DataObject.php
@@ -501,7 +501,11 @@ class Memcached_DataObject extends Safe_DataObject
 
     function raiseError($message, $type = null, $behaviour = null)
     {
-        throw new ServerException("DB_DataObject error [$type]: $message");
+        $id = get_class($this);
+        if ($this->id) {
+            $id .= ':' . $this->id;
+        }
+        throw new ServerException("[$id] DB_DataObject error [$type]: $message");
     }
 
     static function cacheGet($keyPart)

From 584b87cfe57bd2d683101194040e3563f0706536 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Wed, 24 Feb 2010 01:09:52 +0000
Subject: [PATCH 81/97] OStatus: consolidate the low-level notice save code
 between Salmon and PuSH input paths. Validation etc remains at higher levels.

---
 plugins/OStatus/OStatusPlugin.php           |   2 +-
 plugins/OStatus/classes/Ostatus_profile.php | 214 +++++++++++---------
 plugins/OStatus/lib/salmonaction.php        |  50 +----
 3 files changed, 125 insertions(+), 141 deletions(-)

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 724634924d..35f9529355 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -314,7 +314,7 @@ class OStatusPlugin extends Plugin
     {
         $oprofile = Ostatus_profile::staticGet('feeduri', $feedsub->uri);
         if ($oprofile) {
-            $oprofile->processFeed($feed);
+            $oprofile->processFeed($feed, 'push');
         } else {
             common_log(LOG_DEBUG, "No ostatus profile for incoming feed $feedsub->uri");
         }
diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 4998809bc8..6beaf0f5d0 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -488,7 +488,7 @@ class Ostatus_profile extends Memcached_DataObject
      *
      * @param DOMDocument $feed
      */
-    public function processFeed($feed)
+    public function processFeed($feed, $source)
     {
         $entries = $feed->getElementsByTagNameNS(Activity::ATOM, 'entry');
         if ($entries->length == 0) {
@@ -498,7 +498,7 @@ class Ostatus_profile extends Memcached_DataObject
 
         for ($i = 0; $i < $entries->length; $i++) {
             $entry = $entries->item($i);
-            $this->processEntry($entry, $feed);
+            $this->processEntry($entry, $feed, $source);
         }
     }
 
@@ -508,15 +508,12 @@ class Ostatus_profile extends Memcached_DataObject
      * @param DOMElement $entry
      * @param DOMElement $feed for context
      */
-    protected function processEntry($entry, $feed)
+    public function processEntry($entry, $feed, $source)
     {
         $activity = new Activity($entry, $feed);
 
-        $debug = var_export($activity, true);
-        common_log(LOG_DEBUG, $debug);
-
         if ($activity->verb == ActivityVerb::POST) {
-            $this->processPost($activity);
+            $this->processPost($activity, $source);
         } else {
             common_log(LOG_INFO, "Ignoring activity with unrecognized verb $activity->verb");
         }
@@ -525,35 +522,47 @@ class Ostatus_profile extends Memcached_DataObject
     /**
      * Process an incoming post activity from this remote feed.
      * @param Activity $activity
+     * @param string $method 'push' or 'salmon'
+     * @return mixed saved Notice or false
      * @fixme break up this function, it's getting nasty long
      */
-    protected function processPost($activity)
+    public function processPost($activity, $method)
     {
         if ($this->isGroup()) {
+            // A group feed will contain posts from multiple authors.
             // @fixme validate these profiles in some way!
             $oprofile = self::ensureActorProfile($activity);
+            if ($oprofile->isGroup()) {
+                // Groups can't post notices in StatusNet.
+                common_log(LOG_WARNING, "OStatus: skipping post with group listed as author: $oprofile->uri in feed from $this->uri");
+                return false;
+            }
         } else {
+            // Individual user feeds may contain only posts from themselves.
+            // Authorship is validated against the profile URI on upper layers,
+            // through PuSH setup or Salmon signature checks.
             $actorUri = self::getActorProfileURI($activity);
             if ($actorUri == $this->uri) {
                 // @fixme check if profile info has changed and update it
             } else {
-                // @fixme drop or reject the messages once we've got the canonical profile URI recorded sanely
-                common_log(LOG_INFO, "OStatus: Warning: non-group post with unexpected author: $actorUri expected $this->uri");
-                //return;
+                common_log(LOG_WARNING, "OStatus: skipping post with bad author: got $actorUri expected $this->uri");
+                return false;
             }
             $oprofile = $this;
         }
+
+        // The id URI will be used as a unique identifier for for the notice,
+        // protecting against duplicate saves. It isn't required to be a URL;
+        // tag: URIs for instance are found in Google Buzz feeds.
         $sourceUri = $activity->object->id;
-
         $dupe = Notice::staticGet('uri', $sourceUri);
-
         if ($dupe) {
             common_log(LOG_INFO, "OStatus: ignoring duplicate post: $sourceUri");
-            return;
+            return false;
         }
 
+        // We'll also want to save a web link to the original notice, if provided.
         $sourceUrl = null;
-
         if ($activity->object->link) {
             $sourceUrl = $activity->object->link;
         } else if ($activity->link) {
@@ -563,103 +572,126 @@ class Ostatus_profile extends Memcached_DataObject
         }
 
         // Get (safe!) HTML and text versions of the content
-
-        require_once(INSTALLDIR.'/extlib/HTMLPurifier/HTMLPurifier.auto.php');
-
-        $html = $activity->object->content;
-
-        $purifier = new HTMLPurifier();
-
-        $rendered = $purifier->purify($html);
-
+        $rendered = $this->purify($activity->object->content);
         $content = html_entity_decode(strip_tags($rendered));
 
-        $params = array('is_local' => Notice::REMOTE_OMB,
+        $options = array('is_local' => Notice::REMOTE_OMB,
                         'url' => $sourceUrl,
                         'uri' => $sourceUri,
-                        'rendered' => $rendered);
+                        'rendered' => $rendered,
+                        'replies' => array(),
+                        'groups' => array());
 
-        $location = $activity->context->location;
+        // Check for optional attributes...
 
-        if ($location) {
-            $params['lat'] = $location->lat;
-            $params['lon'] = $location->lon;
-            if ($location->location_id) {
-                $params['location_ns'] = $location->location_ns;
-                $params['location_id'] = $location->location_id;
-            }
+        if (!empty($activity->time)) {
+            $options['created'] = common_sql_date($activity->time);
         }
 
-        $profile = $oprofile->localProfile();
-        $params['groups'] = array();
-        $params['replies'] = array();
         if ($activity->context) {
-            foreach ($activity->context->attention as $recipient) {
-                $roprofile = Ostatus_profile::staticGet('uri', $recipient);
-                if ($roprofile) {
-                    if ($roprofile->isGroup()) {
-                        // Deliver to local recipients of this remote group.
-                        // @fixme sender verification?
-                        $params['groups'][] = $roprofile->group_id;
-                        continue;
-                    } else {
-                        // Delivery to remote users is the source service's job.
-                        continue;
-                    }
+            // Any individual or group attn: targets?
+            $replies = $activity->context->attention;
+            $options['groups'] = $this->filterReplies($oprofile, $replies);
+            $options['replies'] = $replies;
+
+            // Maintain direct reply associations
+            // @fixme what about conversation ID?
+            if (!empty($activity->context->replyToID)) {
+                $orig = Notice::staticGet('uri',
+                                          $activity->context->replyToID);
+                if (!empty($orig)) {
+                    $options['reply_to'] = $orig->id;
                 }
-    
-                $user = User::staticGet('uri', $recipient);
-                if ($user) {
-                    // An @-reply directed to a local user.
-                    // @fixme sender verification, spam etc?
-                    $params['replies'][] = $recipient;
-                    continue;
-                }
-    
-                // @fixme we need a uri on user_group
-                // $group = User_group::staticGet('uri', $recipient);
-                $template = common_local_url('groupbyid', array('id' => '31337'));
-                $template = preg_quote($template, '/');
-                $template = str_replace('31337', '(\d+)', $template);
-                common_log(LOG_DEBUG, $template);
-                if (preg_match("/$template/", $recipient, $matches)) {
-                    $id = $matches[1];
-                    $group = User_group::staticGet('id', $id);
-                    if ($group) {
-                        // Deliver to all members of this local group.
-                        // @fixme sender verification?
-                        if ($profile->isMember($group)) {
-                            common_log(LOG_DEBUG, "delivering to group $id $group->nickname");
-                            $params['groups'][] = $group->id;
-                        } else {
-                            common_log(LOG_DEBUG, "not delivering to group $id $group->nickname because sender $profile->nickname is not a member");
-                        }
-                        continue;
-                    } else {
-                        common_log(LOG_DEBUG, "not delivering to missing group $id");
-                    }
-                } else {
-                    common_log(LOG_DEBUG, "not delivering to groups for $recipient");
+            }
+
+            $location = $activity->context->location;
+            if ($location) {
+                $options['lat'] = $location->lat;
+                $options['lon'] = $location->lon;
+                if ($location->location_id) {
+                    $options['location_ns'] = $location->location_ns;
+                    $options['location_id'] = $location->location_id;
                 }
             }
         }
 
         try {
-            $saved = Notice::saveNew($profile->id,
+            $saved = Notice::saveNew($oprofile->profile_id,
                                      $content,
                                      'ostatus',
-                                     $params);
+                                     $options);
+            if ($saved) {
+                Ostatus_source::saveNew($saved, $this, $method);
+            }
         } catch (Exception $e) {
-            common_log(LOG_ERR, "Failed saving notice entry for $sourceUri: " . $e->getMessage());
-            return;
+            common_log(LOG_ERR, "OStatus save of remote message $sourceUri failed: " . $e->getMessage());
+            throw $e;
         }
+        common_log(LOG_INFO, "OStatus saved remote message $sourceUri as notice id $saved->id");
+        return $saved;
+    }
 
-        // Record which feed this came through...
-        try {
-            Ostatus_source::saveNew($saved, $this, 'push');
-        } catch (Exception $e) {
-            common_log(LOG_ERR, "Failed saving ostatus_source entry for $saved->notice_id: " . $e->getMessage());
+    /**
+     * Clean up HTML
+     */
+    protected function purify($html)
+    {
+        // @fixme disable caching or set a sane temp dir
+        require_once(INSTALLDIR.'/extlib/HTMLPurifier/HTMLPurifier.auto.php');
+        $purifier = new HTMLPurifier();
+        return $purifier->purify($html);
+    }
+
+    /**
+     * Filters a list of recipient ID URIs to just those for local delivery.
+     * @param Ostatus_profile local profile of sender
+     * @param array in/out &$attention_uris set of URIs, will be pruned on output
+     * @return array of group IDs
+     */
+    protected function filterReplies($sender, &$attention_uris)
+    {
+        $groups = array();
+        $replies = array();
+        foreach ($attention_uris as $recipient) {
+            // Is the recipient a local user?
+            $user = User::staticGet('uri', $recipient);
+            if ($user) {
+                // @fixme sender verification, spam etc?
+                $replies[] = $recipient;
+                continue;
+            }
+
+            // Is the recipient a remote group?
+            $oprofile = Ostatus_profile::staticGet('uri', $recipient);
+            if ($oprofile) {
+                if ($oprofile->isGroup()) {
+                    // Deliver to local members of this remote group.
+                    // @fixme sender verification?
+                    $groups[] = $oprofile->group_id;
+                }
+                continue;
+            }
+
+            // Is the recipient a local group?
+            // @fixme we need a uri on user_group
+            // $group = User_group::staticGet('uri', $recipient);
+            $template = common_local_url('groupbyid', array('id' => '31337'));
+            $template = preg_quote($template, '/');
+            $template = str_replace('31337', '(\d+)', $template);
+            if (preg_match("/$template/", $recipient, $matches)) {
+                $id = $matches[1];
+                $group = User_group::staticGet('id', $id);
+                if ($group) {
+                    // Deliver to all members of this local group if allowed.
+                    if ($sender->localProfile()->isMember($group)) {
+                        $groups[] = $group->id;
+                    }
+                    continue;
+                }
+            }
         }
+        $attention_uris = $replies;
+        return $groups;
     }
 
     /**
diff --git a/plugins/OStatus/lib/salmonaction.php b/plugins/OStatus/lib/salmonaction.php
index 83cf0b8f8a..9aac2ed52f 100644
--- a/plugins/OStatus/lib/salmonaction.php
+++ b/plugins/OStatus/lib/salmonaction.php
@@ -185,54 +185,6 @@ class SalmonAction extends Action
     function saveNotice()
     {
         $oprofile = $this->ensureProfile();
-
-        // Get (safe!) HTML and text versions of the content
-
-        require_once(INSTALLDIR.'/extlib/HTMLPurifier/HTMLPurifier.auto.php');
-
-        $html = $this->act->object->content;
-
-        $purifier = new HTMLPurifier();
-
-        $rendered = $purifier->purify($html);
-
-        $content = html_entity_decode(strip_tags($rendered));
-
-        $options = array('is_local' => Notice::REMOTE_OMB,
-                         'uri' => $this->act->object->id,
-                         'url' => $this->act->object->link,
-                         'rendered' => $rendered,
-                         'replies' => $this->act->context->attention);
-
-        if (!empty($this->act->context->location)) {
-            $options['lat'] = $location->lat;
-            $options['lon'] = $location->lon;
-            if ($location->location_id) {
-                $options['location_ns'] = $location->location_ns;
-                $options['location_id'] = $location->location_id;
-            }
-        }
-
-        if (!empty($this->act->context->replyToID)) {
-            $orig = Notice::staticGet('uri',
-                                      $this->act->context->replyToID);
-            if (!empty($orig)) {
-                $options['reply_to'] = $orig->id;
-            }
-        }
-
-        if (!empty($this->act->time)) {
-            $options['created'] = common_sql_date($this->act->time);
-        }
-
-        $saved = Notice::saveNew($oprofile->profile_id,
-                                 $content,
-                                 'ostatus+salmon',
-                                 $options);
-
-        // Record that this was saved through a validated Salmon source
-        // @fixme actually do the signature validation!
-        Ostatus_source::saveNew($saved, $oprofile, 'salmon');
-        return $saved;
+        return $oprofile->processPost($this->act, 'salmon');
     }
 }

From 2e58802cc9959763f28e2f43c8e0cd0dbe7bcd8e Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Wed, 24 Feb 2010 02:19:13 +0000
Subject: [PATCH 82/97] OStatus: fix group delivery, send reply/group Salmon
 pings from background.

---
 plugins/OStatus/OStatusPlugin.php             | 28 ++----
 plugins/OStatus/actions/groupsalmon.php       |  9 +-
 plugins/OStatus/classes/Ostatus_profile.php   | 15 ++-
 ...euehandler.php => ostatusqueuehandler.php} | 95 +++++++++++++------
 plugins/OStatus/lib/salmonoutqueuehandler.php | 44 +++++++++
 5 files changed, 140 insertions(+), 51 deletions(-)
 rename plugins/OStatus/lib/{hubdistribqueuehandler.php => ostatusqueuehandler.php} (65%)
 create mode 100644 plugins/OStatus/lib/salmonoutqueuehandler.php

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 35f9529355..9376c048de 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -78,11 +78,16 @@ class OStatusPlugin extends Plugin
      */
     function onEndInitializeQueueManager(QueueManager $qm)
     {
+        // Prepare outgoing distributions after notice save.
+        $qm->connect('ostatus', 'OStatusQueueHandler');
+
         // Outgoing from our internal PuSH hub
         $qm->connect('hubverify', 'HubVerifyQueueHandler');
-        $qm->connect('hubdistrib', 'HubDistribQueueHandler');
         $qm->connect('hubout', 'HubOutQueueHandler');
 
+        // Outgoing Salmon replies (when we don't need a return value)
+        $qm->connect('salmonout', 'SalmonOutQueueHandler');
+
         // Incoming from a foreign PuSH hub
         $qm->connect('pushinput', 'PushInputQueueHandler');
         return true;
@@ -93,7 +98,7 @@ class OStatusPlugin extends Plugin
      */
     function onStartEnqueueNotice($notice, &$transports)
     {
-        $transports[] = 'hubdistrib';
+        $transports[] = 'ostatus';
         return true;
     }
 
@@ -199,25 +204,6 @@ class OStatusPlugin extends Plugin
 
     function onEndNoticeSave($notice)
     {
-        $mentioned = $notice->getReplies();
-
-        foreach ($mentioned as $profile_id) {
-
-            $oprofile = Ostatus_profile::staticGet('profile_id', $profile_id);
-
-            if (!empty($oprofile) && !empty($oprofile->salmonuri)) {
-
-                common_log(LOG_INFO, "Sending notice '{$notice->uri}' to remote profile '{$oprofile->uri}'.");
-
-                // FIXME: this needs to go out in a queue handler
-
-                $xml = '<?xml version="1.0" encoding="UTF-8" ?' . '>';
-                $xml .= $notice->asAtomEntry(true, true);
-
-                $salmon = new Salmon();
-                $salmon->post($oprofile->salmonuri, $xml);
-            }
-        }
     }
 
     /**
diff --git a/plugins/OStatus/actions/groupsalmon.php b/plugins/OStatus/actions/groupsalmon.php
index 2e4fe94436..29377b5fa0 100644
--- a/plugins/OStatus/actions/groupsalmon.php
+++ b/plugins/OStatus/actions/groupsalmon.php
@@ -46,6 +46,11 @@ class GroupsalmonAction extends SalmonAction
             $this->clientError(_('No such group.'));
         }
 
+        $oprofile = Ostatus_profile::staticGet('group_id', $id);
+        if ($oprofile) {
+            $this->clientError(_m("Can't accept remote posts for a remote group."));
+        }
+
         return true;
     }
 
@@ -74,13 +79,13 @@ class GroupsalmonAction extends SalmonAction
             throw new ClientException("Not to the attention of anyone.");
         } else {
             $uri = common_local_url('groupbyid', array('id' => $this->group->id));
-            if (!in_array($context->attention, $uri)) {
+            if (!in_array($uri, $context->attention)) {
                 throw new ClientException("Not to the attention of this group.");
             }
         }
 
         $profile = $this->ensureProfile();
-        // @fixme save the post
+        $this->saveNotice();
     }
 
     /**
diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 6beaf0f5d0..82dbf773dd 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -650,6 +650,7 @@ class Ostatus_profile extends Memcached_DataObject
      */
     protected function filterReplies($sender, &$attention_uris)
     {
+        common_log(LOG_DEBUG, "Original reply recipients: " . implode(', ', $attention_uris));
         $groups = array();
         $replies = array();
         foreach ($attention_uris as $recipient) {
@@ -668,6 +669,8 @@ class Ostatus_profile extends Memcached_DataObject
                     // Deliver to local members of this remote group.
                     // @fixme sender verification?
                     $groups[] = $oprofile->group_id;
+                } else {
+                    common_log(LOG_DEBUG, "Skipping reply to remote profile $recipient");
                 }
                 continue;
             }
@@ -683,14 +686,24 @@ class Ostatus_profile extends Memcached_DataObject
                 $group = User_group::staticGet('id', $id);
                 if ($group) {
                     // Deliver to all members of this local group if allowed.
-                    if ($sender->localProfile()->isMember($group)) {
+                    $profile = $sender->localProfile();
+                    if ($profile->isMember($group)) {
                         $groups[] = $group->id;
+                    } else {
+                        common_log(LOG_DEBUG, "Skipping reply to local group $group->nickname as sender $profile->id is not a member");
                     }
                     continue;
+                } else {
+                    common_log(LOG_DEBUG, "Skipping reply to bogus group $recipient");
                 }
             }
+
+            common_log(LOG_DEBUG, "Skipping reply to unrecognized profile $recipient");
+
         }
         $attention_uris = $replies;
+        common_log(LOG_DEBUG, "Local reply recipients: " . implode(', ', $replies));
+        common_log(LOG_DEBUG, "Local group recipients: " . implode(', ', $groups));
         return $groups;
     }
 
diff --git a/plugins/OStatus/lib/hubdistribqueuehandler.php b/plugins/OStatus/lib/ostatusqueuehandler.php
similarity index 65%
rename from plugins/OStatus/lib/hubdistribqueuehandler.php
rename to plugins/OStatus/lib/ostatusqueuehandler.php
index c2bd630f9c..c1e50bffa1 100644
--- a/plugins/OStatus/lib/hubdistribqueuehandler.php
+++ b/plugins/OStatus/lib/ostatusqueuehandler.php
@@ -18,46 +18,89 @@
  */
 
 /**
- * Send a PuSH subscription verification from our internal hub.
- * Queue up final distribution for 
- * @package Hub
+ * Prepare PuSH and Salmon distributions for an outgoing message.
+ *
+ * @package OStatusPlugin
  * @author Brion Vibber <brion@status.net>
  */
-class HubDistribQueueHandler extends QueueHandler
+class OStatusQueueHandler extends QueueHandler
 {
     function transport()
     {
-        return 'hubdistrib';
+        return 'ostatus';
     }
 
     function handle($notice)
     {
         assert($notice instanceof Notice);
 
-        $this->pushUser($notice);
+        $this->notice = $notice;
+        $this->user = User::staticGet($notice->profile_id);
+
+        $this->pushUser();
+
         foreach ($notice->getGroups() as $group) {
-            $this->pushGroup($notice, $group->id);
+            $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
+            if ($oprofile) {
+                $this->pingReply($oprofile);
+            } else {
+                $this->pushGroup($group->id);
+            }
         }
+
+        foreach ($notice->getReplies() as $profile_id) {
+            $oprofile = Ostatus_profile::staticGet('profile_id', $profile_id);
+            if ($oprofile) {
+                $this->pingReply($oprofile);
+            }
+        }
+
         return true;
     }
-    
-    function pushUser($notice)
+
+    function pushUser()
     {
-        // See if there's any PuSH subscriptions, including OStatus clients.
-        // @fixme handle group subscriptions as well
-        // http://identi.ca/api/statuses/user_timeline/1.atom
-        $feed = common_local_url('ApiTimelineUser',
-                                 array('id' => $notice->profile_id,
-                                       'format' => 'atom'));
-        $this->pushFeed($feed, array($this, 'userFeedForNotice'), $notice);
+        if ($this->user) {
+            // For local posts, ping the PuSH hub to update their feed.
+            // http://identi.ca/api/statuses/user_timeline/1.atom
+            $feed = common_local_url('ApiTimelineUser',
+                                     array('id' => $this->user->id,
+                                           'format' => 'atom'));
+            $this->pushFeed($feed, array($this, 'userFeedForNotice'));
+        }
     }
 
-    function pushGroup($notice, $group_id)
+    function pushGroup($group_id)
     {
+        // For a local group, ping the PuSH hub to update its feed.
+        // Updates may come from either a local or a remote user.
         $feed = common_local_url('ApiTimelineGroup',
                                  array('id' => $group_id,
                                        'format' => 'atom'));
-        $this->pushFeed($feed, array($this, 'groupFeedForNotice'), $group_id, $notice);
+        $this->pushFeed($feed, array($this, 'groupFeedForNotice'), $group_id);
+    }
+
+    function pingReply($oprofile)
+    {
+        if ($this->user) {
+            if (!empty($oprofile->salmonuri)) {
+                // For local posts, send a Salmon ping to the mentioned
+                // remote user or group.
+                // @fixme as an optimization we can skip this if the
+                // remote profile is subscribed to the author.
+
+                common_log(LOG_INFO, "Prepping to send notice '{$this->notice->uri}' to remote profile '{$oprofile->uri}'.");
+
+                $xml = '<?xml version="1.0" encoding="UTF-8" ?' . '>';
+                $xml .= $this->notice->asAtomEntry(true, true);
+
+                $data = array('salmonuri' => $oprofile->salmonuri,
+                              'entry' => $xml);
+
+                $qm = QueueManager::get();
+                $qm->enqueue($data, 'salmonout');
+            }
+        }
     }
 
     /**
@@ -122,7 +165,6 @@ class HubDistribQueueHandler extends QueueHandler
     function pushFeedInternal($atom, $sub)
     {
         common_log(LOG_INFO, "Preparing $sub->N PuSH distribution(s) for $sub->topic");
-        $qm = QueueManager::get();
         while ($sub->fetch()) {
             $sub->distribute($atom);
         }
@@ -130,20 +172,19 @@ class HubDistribQueueHandler extends QueueHandler
 
     /**
      * Build a single-item version of the sending user's Atom feed.
-     * @param Notice $notice
      * @return string
      */
-    function userFeedForNotice($notice)
+    function userFeedForNotice()
     {
         // @fixme this feels VERY hacky...
         // should probably be a cleaner way to do it
 
         ob_start();
         $api = new ApiTimelineUserAction();
-        $api->prepare(array('id' => $notice->profile_id,
+        $api->prepare(array('id' => $this->notice->profile_id,
                             'format' => 'atom',
-                            'max_id' => $notice->id,
-                            'since_id' => $notice->id - 1));
+                            'max_id' => $this->notice->id,
+                            'since_id' => $this->notice->id - 1));
         $api->showTimeline();
         $feed = ob_get_clean();
         
@@ -155,7 +196,7 @@ class HubDistribQueueHandler extends QueueHandler
         return $feed;
     }
 
-    function groupFeedForNotice($group_id, $notice)
+    function groupFeedForNotice($group_id)
     {
         // @fixme this feels VERY hacky...
         // should probably be a cleaner way to do it
@@ -164,8 +205,8 @@ class HubDistribQueueHandler extends QueueHandler
         $api = new ApiTimelineGroupAction();
         $args = array('id' => $group_id,
                       'format' => 'atom',
-                      'max_id' => $notice->id,
-                      'since_id' => $notice->id - 1);
+                      'max_id' => $this->notice->id,
+                      'since_id' => $this->notice->id - 1);
         $api->prepare($args);
         $api->handle($args);
         $feed = ob_get_clean();
diff --git a/plugins/OStatus/lib/salmonoutqueuehandler.php b/plugins/OStatus/lib/salmonoutqueuehandler.php
new file mode 100644
index 0000000000..536ff94af6
--- /dev/null
+++ b/plugins/OStatus/lib/salmonoutqueuehandler.php
@@ -0,0 +1,44 @@
+<?php
+/*
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Send a Salmon notification in the background.
+ * @package OStatusPlugin
+ * @author Brion Vibber <brion@status.net>
+ */
+class SalmonOutQueueHandler extends QueueHandler
+{
+    function transport()
+    {
+        return 'salmonout';
+    }
+
+    function handle($data)
+    {
+        assert(is_array($data));
+        assert(is_string($data['salmonuri']));
+        assert(is_string($data['entry']));
+
+        $salmon = new Salmon();
+        $salmon->post($data['salmonuri'], $data['entry']);
+
+        // @fixme detect failure and attempt to resend
+        return true;
+    }
+}

From 3a3af6782a82ca3512680a276b76d1d10de47d94 Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@status.net>
Date: Tue, 23 Feb 2010 22:35:48 -0800
Subject: [PATCH 83/97] Add PoCo parsing and some other fixes.

---
 lib/activity.php | 162 ++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 132 insertions(+), 30 deletions(-)

diff --git a/lib/activity.php b/lib/activity.php
index 853741a9a1..5cbab8d5f3 100644
--- a/lib/activity.php
+++ b/lib/activity.php
@@ -34,6 +34,7 @@ if (!defined('STATUSNET')) {
 
 class PoCoURL
 {
+    const URLS      = 'urls';
     const TYPE      = 'type';
     const VALUE     = 'value';
     const PRIMARY   = 'primary';
@@ -55,7 +56,7 @@ class PoCoURL
         $xs->elementStart('poco:urls');
         $xs->element('poco:type', null, $this->type);
         $xs->element('poco:value', null, $this->value);
-        if ($this->primary) {
+        if (!empty($this->primary)) {
             $xs->element('poco:primary', null, 'true');
         }
         $xs->elementEnd('poco:urls');
@@ -70,21 +71,19 @@ class PoCoAddress
 
     public $formatted;
 
-    function __construct($formatted)
-    {
-        if (empty($formatted)) {
-            return null;
-        }
-        $this->formatted = $formatted;
-    }
+    // @todo Other address fields
 
     function asString()
     {
-        $xs = new XMLStringer(true);
-        $xs->elementStart('poco:address');
-        $xs->element('poco:formatted', null, $this->formatted);
-        $xs->elementEnd('poco:address');
-        return $xs->getString();
+        if (!empty($this->formatted)) {
+            $xs = new XMLStringer(true);
+            $xs->elementStart('poco:address');
+            $xs->element('poco:formatted', null, $this->formatted);
+            $xs->elementEnd('poco:address');
+            return $xs->getString();
+        }
+
+        return null;
     }
 }
 
@@ -92,26 +91,117 @@ class PoCo
 {
     const NS = 'http://portablecontacts.net/spec/1.0';
 
-    const USERNAME  = 'preferredUsername';
-    const NOTE      = 'note';
-    const URLS      = 'urls';
+    const USERNAME     = 'preferredUsername';
+    const DISPLAYNAME  = 'displayName';
+    const NOTE         = 'note';
 
     public $preferredUsername;
+    public $displayName;
     public $note;
     public $address;
     public $urls = array();
 
-    function __construct($profile)
+    function __construct($element = null)
     {
-        $this->preferredUsername = $profile->nickname;
-        $this->displayName       = $profile->getBestName();
+        if (empty($element)) {
+            return;
+        }
 
-        $this->note    = $profile->bio;
-        $this->address = new PoCoAddress($profile->location);
+        $this->preferredUsername = ActivityUtils::childContent(
+            $element,
+            self::USERNAME,
+            self::NS
+        );
+
+        $this->displayName = ActivityUtils::childContent(
+            $element,
+            self::DISPLAYNAME,
+            self::NS
+        );
+
+        $this->note = ActivityUtils::childContent(
+            $element,
+            self::NOTE,
+            self::NS
+        );
+
+        $this->address = $this->_getAddress($element);
+        $this->urls = $this->_getURLs($element);
+    }
+
+    private function _getURLs($element)
+    {
+        $urlEls = $element->getElementsByTagnameNS(self::NS, PoCoURL::URLS);
+        $urls = array();
+
+        foreach ($urlEls as $urlEl) {
+
+            $type = ActivityUtils::childContent(
+                $urlEl,
+                PoCoURL::TYPE,
+                PoCo::NS
+            );
+
+            $value = ActivityUtils::childContent(
+                $urlEl,
+                PoCoURL::VALUE,
+                PoCo::NS
+            );
+
+            $primary = ActivityUtils::childContent(
+                $urlEl,
+                PoCoURL::PRIMARY,
+                PoCo::NS
+            );
+
+            array_push($urls, new PoCoURL($type, $value, $primary));
+        }
+        return $urls;
+    }
+
+    private function _getAddress($element)
+    {
+        $addressEl = ActivityUtils::child(
+            $element,
+            PoCoAddress::ADDRESS,
+            PoCo::NS
+        );
+
+        $formatted = ActivityUtils::childContent(
+            $addressEl,
+            PoCoAddress::FORMATTED,
+            self::NS
+        );
+
+        if (!empty($formatted)) {
+            $address = new PoCoAddress();
+            $address->formatted = $formatted;
+            return $address;
+        }
+
+        return null;
+    }
+
+    function fromProfile($profile)
+    {
+        if (empty($profile)) {
+            return null;
+        }
+
+        $poco = new PoCo();
+
+        $poco->preferredUsername = $profile->nickname;
+        $poco->displayName       = $profile->getBestName();
+
+        $poco->note = $profile->bio;
+
+        $paddy = new PoCoAddress();
+        $paddy->formatted = $profile->location;
+        $poco->address = $paddy;
 
         if (!empty($profile->homepage)) {
             array_push(
-                $this->urls,
+                $poco->urls,
                 new PoCoURL(
                     'homepage',
                     $profile->homepage,
@@ -119,6 +209,8 @@ class PoCo
                 )
             );
         }
+
+        return $poco;
     }
 
     function asString()
@@ -381,6 +473,8 @@ class ActivityObject
     public $source;
     public $avatar;
     public $geopoint;
+    public $poco;
+    public $displayName;
 
     /**
      * Constructor
@@ -433,7 +527,6 @@ class ActivityObject
 
             $this->link = ActivityUtils::getPermalink($element);
 
-            // XXX: grab PoCo stuff
         }
 
         // Some per-type attributes...
@@ -441,8 +534,9 @@ class ActivityObject
             $this->displayName = $this->title;
 
             // @fixme we may have multiple avatars with different resolutions specified
-            $this->avatar   = ActivityUtils::getLink($element, 'avatar');
-            $this->nickname = ActivityUtils::childContent($element, PoCo::USERNAME, PoCo::NS);
+            $this->avatar = ActivityUtils::getLink($element, 'avatar');
+
+            $this->poco = new PoCo($element);
         }
     }
 
@@ -497,7 +591,7 @@ class ActivityObject
             $object->geopoint = (float)$profile->lat . ' ' . (float)$profile->lon;
         }
 
-        $object->poco = new PoCo($profile);
+        $object->poco = PoCo::fromProfile($profile);
 
         return $object;
     }
@@ -526,11 +620,19 @@ class ActivityObject
         }
 
         if (!empty($this->link)) {
-            $xs->element('link', array('rel' => 'alternate', 'type' => 'text/html'),
-                         $this->link);
+            $xs->element(
+                'link',
+                array(
+                    'rel' => 'alternate',
+                    'type' => 'text/html',
+                    'href' => $this->link
+                ),
+                null
+            );
         }
 
-        if ($this->type == ActivityObject::PERSON) {
+        if ($this->type == ActivityObject::PERSON
+            || $this->type == ActivityObject::GROUP) {
             $xs->element(
                 'link', array(
                     'type' => empty($this->avatar) ? 'image/png' : $this->avatar->mediatype,
@@ -539,7 +641,7 @@ class ActivityObject
                     ? Avatar::defaultImage(AVATAR_PROFILE_SIZE)
                     : $this->avatar->displayUrl()
                 ),
-                ''
+                null
             );
         }
 

From 618ce6a855330f424d54c3dedf10acb60f7e3001 Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@status.net>
Date: Tue, 23 Feb 2010 23:58:21 -0800
Subject: [PATCH 84/97] - Move ActivityParseTests to core - Add test for
 Portable Contacts stuff

---
 .../tests => tests}/ActivityParseTests.php    | 159 +++++++++++++++---
 1 file changed, 138 insertions(+), 21 deletions(-)
 rename {plugins/OStatus/tests => tests}/ActivityParseTests.php (57%)

diff --git a/plugins/OStatus/tests/ActivityParseTests.php b/tests/ActivityParseTests.php
similarity index 57%
rename from plugins/OStatus/tests/ActivityParseTests.php
rename to tests/ActivityParseTests.php
index d7305dedea..5de97d2e2e 100644
--- a/plugins/OStatus/tests/ActivityParseTests.php
+++ b/tests/ActivityParseTests.php
@@ -7,11 +7,10 @@ if (isset($_SERVER) && array_key_exists('REQUEST_METHOD', $_SERVER)) {
 
 // XXX: we should probably have some common source for this stuff
 
-define('INSTALLDIR', realpath(dirname(__FILE__) . '/../../..'));
+define('INSTALLDIR', realpath(dirname(__FILE__) . '/..'));
 define('STATUSNET', true);
 
 require_once INSTALLDIR . '/lib/common.php';
-require_once INSTALLDIR . '/plugins/OStatus/lib/activity.php';
 
 class ActivityParseTests extends PHPUnit_Framework_TestCase
 {
@@ -97,6 +96,45 @@ class ActivityParseTests extends PHPUnit_Framework_TestCase
 
         $this->assertFalse(empty($act->actor));
     }
+
+    public function testExample5()
+    {
+        global $_example5;
+        $dom = DOMDocument::loadXML($_example5);
+
+        $feed = $dom->documentElement;
+
+        // @todo Test feed elements
+
+        $entries = $feed->getElementsByTagName('entry');
+        $entry = $entries->item(0);
+
+        $act = new Activity($entry, $feed);
+
+        // Post
+        $this->assertEquals($act->verb, ActivityVerb::POST);
+        $this->assertFalse(empty($act->context));
+
+        // Actor w/Portable Contacts stuff
+        $this->assertFalse(empty($act->actor));
+        $this->assertEquals($act->actor->type, ActivityObject::PERSON);
+        $this->assertEquals($act->actor->title, 'Test User');
+        $this->assertEquals($act->actor->id, 'http://example.net/mysite/user/3');
+        $this->assertEquals($act->actor->link, 'http://example.net/mysite/testuser');
+        $this->assertEquals(
+            $act->actor->avatar,
+            'http://example.net/mysite/avatar/3-96-20100224004207.jpeg'
+        );
+        $this->assertEquals($act->actor->displayName, 'Test User');
+
+        $poco = $act->actor->poco;
+        $this->assertEquals($poco->preferredUsername, 'testuser');
+        $this->assertEquals($poco->address->formatted, 'San Francisco, CA');
+        $this->assertEquals($poco->urls[0]->type, 'homepage');
+        $this->assertEquals($poco->urls[0]->value, 'http://example.com/blog.html');
+        $this->assertEquals($poco->urls[0]->primary, 'true');
+    }
+
 }
 
 $_example1 = <<<EXAMPLE1
@@ -156,26 +194,26 @@ $_example3 = <<<EXAMPLE3
 
 <feed xmlns="http://www.w3.org/2005/Atom">
 
-	<title>Example Feed</title>
-	<subtitle>A subtitle.</subtitle>
-	<link href="http://example.org/feed/" rel="self" />
-	<link href="http://example.org/" />
-	<id>urn:uuid:60a76c80-d399-11d9-b91C-0003939e0af6</id>
-	<updated>2003-12-13T18:30:02Z</updated>
-	<author>
-		<name>John Doe</name>
-		<email>johndoe@example.com</email>
-	</author>
+    <title>Example Feed</title>
+    <subtitle>A subtitle.</subtitle>
+    <link href="http://example.org/feed/" rel="self" />
+    <link href="http://example.org/" />
+    <id>urn:uuid:60a76c80-d399-11d9-b91C-0003939e0af6</id>
+    <updated>2003-12-13T18:30:02Z</updated>
+    <author>
+        <name>John Doe</name>
+        <email>johndoe@example.com</email>
+    </author>
 
-	<entry>
-		<title>Atom-Powered Robots Run Amok</title>
-		<link href="http://example.org/2003/12/13/atom03" />
-		<link rel="alternate" type="text/html" href="http://example.org/2003/12/13/atom03.html"/>
-		<link rel="edit" href="http://example.org/2003/12/13/atom03/edit"/>
-		<id>urn:uuid:1225c695-cfb8-4ebb-aaaa-80da344efa6a</id>
-		<updated>2003-12-13T18:30:02Z</updated>
-		<summary>Some text.</summary>
-	</entry>
+    <entry>
+        <title>Atom-Powered Robots Run Amok</title>
+        <link href="http://example.org/2003/12/13/atom03" />
+        <link rel="alternate" type="text/html" href="http://example.org/2003/12/13/atom03.html"/>
+        <link rel="edit" href="http://example.org/2003/12/13/atom03/edit"/>
+        <id>urn:uuid:1225c695-cfb8-4ebb-aaaa-80da344efa6a</id>
+        <updated>2003-12-13T18:30:02Z</updated>
+        <summary>Some text.</summary>
+    </entry>
 
 </feed>
 EXAMPLE3;
@@ -207,3 +245,82 @@ $_example4 = <<<EXAMPLE4
  <category term="thetime"></category>
 </entry>
 EXAMPLE4;
+
+$_example5 = <<<EXAMPLE5
+<?xml version="1.0" encoding="UTF-8"?>
+<feed xml:lang="en-US" xmlns="http://www.w3.org/2005/Atom" xmlns:thr="http://purl.org/syndication/thread/1.0" xmlns:georss="http://www.georss.org/georss" xmlns:activity="http://activitystrea.ms/spec/1.0/" xmlns:poco="http://portablecontacts.net/spec/1.0" xmlns:ostatus="http://ostatus.org/schema/1.0">
+ <id>3</id>
+ <title>testuser timeline</title>
+ <subtitle>Updates from testuser on Zach Dev!</subtitle>
+ <logo>http://example.net/mysite/avatar/3-96-20100224004207.jpeg</logo>
+ <updated>2010-02-24T06:38:49+00:00</updated>
+<author>
+ <name>testuser</name>
+ <uri>http://example.net/mysite/user/3</uri>
+
+</author>
+ <link href="http://example.net/mysite/testuser" rel="alternate" type="text/html"/>
+ <link href="http://example.net/mysite/api/statuses/user_timeline/3.atom" rel="self" type="application/atom+xml"/>
+ <link href="http://example.net/mysite/main/sup#3" rel="http://api.friendfeed.com/2008/03#sup" type="application/json"/>
+ <link href="http://example.net/mysite/main/push/hub" rel="hub"/>
+ <link href="http://example.net/mysite/main/salmon/user/3" rel="salmon"/>
+<activity:subject>
+ <activity:object-type>http://activitystrea.ms/schema/1.0/person</activity:object-type>
+ <id>http://example.net/mysite/user/3</id>
+ <title>Test User</title>
+ <link rel="alternate" type="text/html" href="http://example.net/mysite/testuser"/>
+ <link type="image/jpeg" rel="avatar" href="http://example.net/mysite/avatar/3-96-20100224004207.jpeg"/>
+ <georss:point>37.7749295 -122.4194155</georss:point>
+
+<poco:preferredUsername>testuser</poco:preferredUsername>
+<poco:displayName>Test User</poco:displayName>
+<poco:note>Just another test user.</poco:note>
+<poco:address>
+ <poco:formatted>San Francisco, CA</poco:formatted>
+</poco:address>
+<poco:urls>
+ <poco:type>homepage</poco:type>
+ <poco:value>http://example.com/blog.html</poco:value>
+ <poco:primary>true</poco:primary>
+
+</poco:urls>
+</activity:subject>
+<entry>
+ <title>Hey man, is that Freedom Code?! #freedom #hippy</title>
+ <summary>Hey man, is that Freedom Code?! #freedom #hippy</summary>
+<author>
+ <name>testuser</name>
+ <uri>http://example.net/mysite/user/3</uri>
+</author>
+<activity:actor>
+ <activity:object-type>http://activitystrea.ms/schema/1.0/person</activity:object-type>
+ <id>http://example.net/mysite/user/3</id>
+ <title>Test User</title>
+ <link rel="alternate" type="text/html" href="http://example.net/mysite/testuser"/>
+ <link type="image/jpeg" rel="avatar" href="http://example.net/mysite/avatar/3-96-20100224004207.jpeg"/>
+ <georss:point>37.7749295 -122.4194155</georss:point>
+
+<poco:preferredUsername>testuser</poco:preferredUsername>
+<poco:displayName>Test User</poco:displayName>
+<poco:note>Just another test user.</poco:note>
+<poco:address>
+ <poco:formatted>San Francisco, CA</poco:formatted>
+</poco:address>
+<poco:urls>
+ <poco:type>homepage</poco:type>
+ <poco:value>http://example.com/blog.html</poco:value>
+ <poco:primary>true</poco:primary>
+
+</poco:urls>
+</activity:actor>
+ <link rel="alternate" type="text/html" href="http://example.net/mysite/notice/7"/>
+ <id>http://example.net/mysite/notice/7</id>
+ <published>2010-02-24T00:53:06+00:00</published>
+ <updated>2010-02-24T00:53:06+00:00</updated>
+ <link rel="ostatus:conversation" href="http://example.net/mysite/conversation/7"/>
+ <content type="html">Hey man, is that Freedom Code?! #&lt;span class=&quot;tag&quot;&gt;&lt;a href=&quot;http://example.net/mysite/tag/freedom&quot; rel=&quot;tag&quot;&gt;freedom&lt;/a&gt;&lt;/span&gt; #&lt;span class=&quot;tag&quot;&gt;&lt;a href=&quot;http://example.net/mysite/tag/hippy&quot; rel=&quot;tag&quot;&gt;hippy&lt;/a&gt;&lt;/span&gt;</content>
+ <georss:point>37.8313160 -122.2852473</georss:point>
+
+</entry>
+</feed>
+EXAMPLE5;

From 2466dbfc97e81144d005fa546b387c9747ce00ad Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Wed, 24 Feb 2010 14:55:35 +0100
Subject: [PATCH 85/97] Break long strings in tagcloud

---
 theme/base/css/display.css | 1 +
 1 file changed, 1 insertion(+)

diff --git a/theme/base/css/display.css b/theme/base/css/display.css
index 380975e324..52f97f6b12 100644
--- a/theme/base/css/display.css
+++ b/theme/base/css/display.css
@@ -1490,6 +1490,7 @@ text-align:center;
 }
 .aside .tag-cloud {
 font-size:0.8em;
+word-wrap:break-word;
 }
 .tag-cloud li {
 display:inline;

From 8e7606cc8d9003cb5d58410678c2be0f812d0ed1 Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Wed, 24 Feb 2010 15:20:44 +0100
Subject: [PATCH 86/97] Added processing indicator for .form_remote_authorize
 on ostatussub page

---
 plugins/OStatus/js/ostatus.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/plugins/OStatus/js/ostatus.js b/plugins/OStatus/js/ostatus.js
index 1fc44b21b6..3637b8725b 100644
--- a/plugins/OStatus/js/ostatus.js
+++ b/plugins/OStatus/js/ostatus.js
@@ -123,4 +123,6 @@ SN.Init.Subscribe = function() {
 
 $(document).ready(function() {
     SN.Init.Subscribe();
+
+    $('.form_remote_authorize').bind('submit', function() { $(this).addClass(SN.C.S.Processing); return true; });
 });

From 1f45273d5303e98430a02d4480278c24733a5be9 Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Wed, 24 Feb 2010 16:35:20 +0100
Subject: [PATCH 87/97] Moved StatusNetInstance into SN in util.js

---
 js/util.js                    | 32 +++++++++++++++++++++++++++++++-
 plugins/OStatus/js/ostatus.js | 32 +++-----------------------------
 2 files changed, 34 insertions(+), 30 deletions(-)

diff --git a/js/util.js b/js/util.js
index 3623337b9f..78533ab731 100644
--- a/js/util.js
+++ b/js/util.js
@@ -54,7 +54,8 @@ var SN = { // StatusNet
             NoticeGeoName: 'notice_data-geo_name',
             NoticeDataGeo: 'notice_data-geo',
             NoticeDataGeoCookie: 'notice_data-geo_cookie',
-            NoticeDataGeoSelected: 'notice_data-geo_selected'
+            NoticeDataGeoSelected: 'notice_data-geo_selected',
+            StatusNetInstance:'StatusNetInstance'
         }
     },
 
@@ -670,6 +671,35 @@ var SN = { // StatusNet
             date.setFullYear(year, month, day);
 
             return date;
+        },
+
+        StatusNetInstance: {
+            Set: function(value) {
+                var SNI = SN.U.StatusNetInstance.Get();
+                if (SNI !== null) {
+                    value = $.extend(SNI, value);
+                }
+
+                $.cookie(
+                    SN.C.S.StatusNetInstance,
+                    JSON.stringify(value),
+                    {
+                        path: '/',
+                        expires: SN.U.GetFullYear(2029, 0, 1)
+                    });
+            },
+
+            Get: function() {
+                var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
+                if (cookieValue !== null) {
+                    return JSON.parse(cookieValue);
+                }
+                return null;
+            },
+
+            Delete: function() {
+                $.cookie(SN.C.S.StatusNetInstance, null);
+            }
         }
     },
 
diff --git a/plugins/OStatus/js/ostatus.js b/plugins/OStatus/js/ostatus.js
index 3637b8725b..bd29b5c0cf 100644
--- a/plugins/OStatus/js/ostatus.js
+++ b/plugins/OStatus/js/ostatus.js
@@ -24,35 +24,9 @@
  * @note      Everything in here should eventually migrate over to /js/util.js's SN.
  */
 
-SN.C.S.StatusNetInstance = 'StatusNetInstance';
-
-SN.U.StatusNetInstance = {
-    Set: function(value) {
-        $.cookie(
-            SN.C.S.StatusNetInstance,
-            JSON.stringify(value),
-            {
-                path: '/',
-                expires: SN.U.GetFullYear(2029, 0, 1)
-            });
-    },
-
-    Get: function() {
-        var cookieValue = $.cookie(SN.C.S.StatusNetInstance);
-        if (cookieValue !== null) {
-            return JSON.parse(cookieValue);
-        }
-        return null;
-    },
-
-    Delete: function() {
-        $.cookie(SN.C.S.StatusNetInstance, null);
-    }
-};
-
 SN.Init.OStatusCookie = function() {
     if (SN.U.StatusNetInstance.Get() === null) {
-        SN.U.StatusNetInstance.Set({profile: null});
+        SN.U.StatusNetInstance.Set({RemoteProfile: null});
     }
 };
 
@@ -101,10 +75,10 @@ SN.U.DialogBox = {
 
                         if (form.attr('id') == 'form_ostatus_connect') {
                             SN.Init.OStatusCookie();
-                            form.find('#profile').val(SN.U.StatusNetInstance.Get().profile);
+                            form.find('#profile').val(SN.U.StatusNetInstance.Get().RemoteProfile);
 
                             form.find("[type=submit]").bind('click', function() {
-                                SN.U.StatusNetInstance.Set({profile: form.find('#profile').val()});
+                                SN.U.StatusNetInstance.Set({RemoteProfile: form.find('#profile').val()});
                                 return true;
                             });
                         }

From 959171acac5abc3716119f7d5a7918e7497fdbfd Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Wed, 24 Feb 2010 16:39:16 +0100
Subject: [PATCH 88/97] Added a cookie for the nickname cookie for the login
 page and prefill the input field.

---
 js/util.js | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/js/util.js b/js/util.js
index 78533ab731..4b6c39a1dc 100644
--- a/js/util.js
+++ b/js/util.js
@@ -737,6 +737,20 @@ var SN = { // StatusNet
 
                 SN.U.NewDirectMessage();
             }
+        },
+
+        Login: function() {
+            if (SN.U.StatusNetInstance.Get() !== null) {
+                var nickname = SN.U.StatusNetInstance.Get().Nickname;
+                if (nickname !== null) {
+                    $('#form_login #nickname').val(nickname);
+                }
+            }
+
+            $('#form_login').bind('submit', function() {
+                SN.U.StatusNetInstance.Set({Nickname: $('#form_login #nickname').val()});
+                return true;
+            });
         }
     }
 };
@@ -751,5 +765,8 @@ $(document).ready(function(){
     if ($('#content .entity_actions').length > 0) {
         SN.Init.EntityActions();
     }
+    if ($('#form_login').length > 0) {
+        SN.Init.Login();
+    }
 });
 

From 5cabb63e4eaf7cd3642bf7a0c4beb3fef2e1ba07 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Wed, 24 Feb 2010 17:36:31 +0000
Subject: [PATCH 89/97] Include <author> with actor ID and name in
 Activity::asString(); fixes Salmon signature on OStatus unsub pings

---
 lib/activity.php | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/lib/activity.php b/lib/activity.php
index 5cbab8d5f3..fa4ae02748 100644
--- a/lib/activity.php
+++ b/lib/activity.php
@@ -957,11 +957,24 @@ class Activity
         }
 
         // XXX: add context
-        // XXX: add target
 
+        $xs->elementStart('author');
+        $xs->element('uri', array(), $this->actor->id);
+        if ($this->actor->title) {
+            $xs->element('name', array(), $this->actor->title);
+        }
+        $xs->elementEnd('author');
         $xs->raw($this->actor->asString('activity:actor'));
+
         $xs->element('activity:verb', null, $this->verb);
-        $xs->raw($this->object->asString());
+
+        if ($this->object) {
+            $xs->raw($this->object->asString());
+        }
+
+        if ($this->target) {
+            $xs->raw($this->target->asString('activity:target'));
+        }
 
         $xs->elementEnd('entry');
 

From 07214f1370547fcc64db34ce8c8a84ec70e0d5bd Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Wed, 24 Feb 2010 19:06:10 +0000
Subject: [PATCH 90/97] OStatus: save updated profile bits when they come in
 over the wire; fix up nicknames

---
 plugins/OStatus/classes/Ostatus_profile.php | 147 +++++++++++++++-----
 1 file changed, 112 insertions(+), 35 deletions(-)

diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 82dbf773dd..9f9efb96ee 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -33,6 +33,7 @@ class Ostatus_profile extends Memcached_DataObject
 
     public $feeduri;
     public $salmonuri;
+    public $avatar; // remote URL of the last avatar we saved
 
     public $created;
     public $modified;
@@ -58,6 +59,7 @@ class Ostatus_profile extends Memcached_DataObject
                      'group_id' => DB_DATAOBJECT_INT,
                      'feeduri' => DB_DATAOBJECT_STR,
                      'salmonuri' =>  DB_DATAOBJECT_STR,
+                     'avatar' =>  DB_DATAOBJECT_STR,
                      'created' => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME + DB_DATAOBJECT_NOTNULL,
                      'modified' => DB_DATAOBJECT_STR + DB_DATAOBJECT_DATE + DB_DATAOBJECT_TIME + DB_DATAOBJECT_NOTNULL);
     }
@@ -74,6 +76,8 @@ class Ostatus_profile extends Memcached_DataObject
                                    255, true, 'UNI'),
                      new ColumnDef('salmonuri', 'text',
                                    null, true),
+                     new ColumnDef('avatar', 'text',
+                                   null, true),
                      new ColumnDef('created', 'datetime',
                                    null, false),
                      new ColumnDef('modified', 'datetime',
@@ -543,7 +547,8 @@ class Ostatus_profile extends Memcached_DataObject
             // through PuSH setup or Salmon signature checks.
             $actorUri = self::getActorProfileURI($activity);
             if ($actorUri == $this->uri) {
-                // @fixme check if profile info has changed and update it
+                // Check if profile info has changed and update it
+                $this->updateFromActivityObject($activity->actor);
             } else {
                 common_log(LOG_WARNING, "OStatus: skipping post with bad author: got $actorUri expected $this->uri");
                 return false;
@@ -785,6 +790,11 @@ class Ostatus_profile extends Memcached_DataObject
      */
     protected function updateAvatar($url)
     {
+        if ($url == $this->avatar) {
+            // We've already got this one.
+            return;
+        }
+
         if ($this->isGroup()) {
             $self = $this->localGroup();
         } else {
@@ -816,12 +826,28 @@ class Ostatus_profile extends Memcached_DataObject
                                      common_timestamp());
         rename($temp_filename, Avatar::path($filename));
         $self->setOriginal($filename);
+
+        $orig = clone($this);
+        $this->avatar = $url;
+        $this->update($orig);
     }
 
-    protected static function getActivityObjectAvatar($object)
+    /**
+     * Pull avatar URL from ActivityObject or profile hints
+     *
+     * @param ActivityObject $object
+     * @param array $hints
+     * @return mixed URL string or false
+     */
+
+    protected static function getActivityObjectAvatar($object, $hints=array())
     {
-        // XXX: go poke around in the feed
-        return $object->avatar;
+        if ($object->avatar) {
+            return $object->avatar;
+        } else if (array_key_exists('avatar', $hints)) {
+            return $hints['avatar'];
+        }
+        return false;
     }
 
     /**
@@ -888,7 +914,9 @@ class Ostatus_profile extends Memcached_DataObject
     public static function ensureActivityObjectProfile($object, $feeduri=null, $salmonuri=null, $hints=array())
     {
         $profile = self::getActivityObjectProfile($object);
-        if (!$profile) {
+        if ($profile) {
+            $profile->updateFromActivityObject($object, $hints);
+        } else {
             $profile = self::createActivityObjectProfile($object, $feeduri, $salmonuri, $hints);
         }
         return $profile;
@@ -957,8 +985,6 @@ class Ostatus_profile extends Memcached_DataObject
     protected static function createActivityObjectProfile($object, $feeduri=null, $salmonuri=null, $hints=array())
     {
         $homeuri  = $object->id;
-        $nickname = self::getActivityObjectNickname($object, $hints);
-        $avatar   = self::getActivityObjectAvatar($object);
 
         if (!$homeuri) {
             common_log(LOG_DEBUG, __METHOD__ . " empty actor profile URI: " . var_export($activity, true));
@@ -1002,43 +1028,19 @@ class Ostatus_profile extends Memcached_DataObject
 
         if ($object->type == ActivityObject::PERSON) {
             $profile = new Profile();
-            $profile->nickname   = $nickname;
-            $profile->fullname   = $object->title;
-            if (!empty($object->link)) {
-                $profile->profileurl = $object->link;
-            } else if (array_key_exists('profileurl', $hints)) {
-                $profile->profileurl = $hints['profileurl'];
-            }
-            $profile->created    = common_sql_now();
-    
-            // @fixme bio
-            // @fixme tags/categories
-            // @fixme location?
-            // @todo tags from categories
-            // @todo lat/lon/location?
-    
+            self::updateProfile($profile, $object, $hints);
+            $profile->created  = common_sql_now();
+
             $oprofile->profile_id = $profile->insert();
-    
             if (!$oprofile->profile_id) {
                 throw new ServerException("Can't save local profile");
             }
         } else {
             $group = new User_group();
-            $group->nickname = $nickname;
-            $group->fullname = $object->title;
-            // @fixme no canonical profileurl; using homepage instead for now
-            $group->homepage = $homeuri;
             $group->created = common_sql_now();
-
-            // @fixme homepage
-            // @fixme bio
-            // @fixme tags/categories
-            // @fixme location?
-            // @todo tags from categories
-            // @todo lat/lon/location?
+            self::updateGroup($group, $object, $hints);
 
             $oprofile->group_id = $group->insert();
-
             if (!$oprofile->group_id) {
                 throw new ServerException("Can't save local profile");
             }
@@ -1047,6 +1049,7 @@ class Ostatus_profile extends Memcached_DataObject
         $ok = $oprofile->insert();
 
         if ($ok) {
+            $avatar = self::getActivityObjectAvatar($object, $hints);
             if ($avatar) {
                 $oprofile->updateAvatar($avatar);
             }
@@ -1056,8 +1059,82 @@ class Ostatus_profile extends Memcached_DataObject
         }
     }
 
+    /**
+     * Save any updated profile information to our local copy.
+     * @param ActivityObject $object
+     * @param array $hints
+     */
+    protected function updateFromActivityObject($object, $hints=array())
+    {
+        if ($this->isGroup()) {
+            $group = $this->localGroup();
+            self::updateGroup($group, $object, $hints);
+        } else {
+            $profile = $this->localProfile();
+            self::updateProfile($profile, $object, $hints);
+        }
+        $avatar = self::getActivityObjectAvatar($object, $hints);
+        if ($avatar) {
+            $this->updateAvatar($avatar);
+        }
+    }
+
+    protected static function updateProfile($profile, $object, $hints=array())
+    {
+        $orig = clone($profile);
+
+        $profile->nickname = self::getActivityObjectNickname($object, $hints);
+        $profile->fullname = $object->title;
+        if (!empty($object->link)) {
+            $profile->profileurl = $object->link;
+        } else if (array_key_exists('profileurl', $hints)) {
+            $profile->profileurl = $hints['profileurl'];
+        }
+
+        // @fixme bio
+        // @fixme tags/categories
+        // @fixme location?
+        // @todo tags from categories
+        // @todo lat/lon/location?
+
+        if ($profile->id) {
+            common_log(LOG_DEBUG, "Updating OStatus profile $profile->id from remote info $object->id: " . var_export($object, true) . var_export($hints, true));
+            $profile->update($orig);
+        }
+    }
+
+    protected static function updateGroup($group, $object, $hints=array())
+    {
+        $orig = clone($group);
+
+        // @fixme need to make nick unique etc *hack hack*
+        $group->nickname = self::getActivityObjectNickname($object, $hints);
+        $group->fullname = $object->title;
+
+        // @fixme no canonical profileurl; using homepage instead for now
+        $group->homepage = $object->id;
+
+        // @fixme homepage
+        // @fixme bio
+        // @fixme tags/categories
+        // @fixme location?
+        // @todo tags from categories
+        // @todo lat/lon/location?
+
+        if ($group->id) {
+            common_log(LOG_DEBUG, "Updating OStatus group $group->id from remote info $object->id: " . var_export($object, true) . var_export($hints, true));
+            $group->update($orig);
+        }
+    }
+
+
     protected static function getActivityObjectNickname($object, $hints=array())
     {
+        if ($object->poco) {
+            if (!empty($object->poco->preferredUsername)) {
+                return common_nicknamize($object->poco->preferredUsername);
+            }
+        }
         if (!empty($object->nickname)) {
             return common_nicknamize($object->nickname);
         }

From 269d567d9440e3c943f67aad428efce9d112385c Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Wed, 24 Feb 2010 15:20:06 -0500
Subject: [PATCH 91/97] use Subscription::start() for remote subscribes

---
 plugins/OStatus/classes/Ostatus_profile.php | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 9f9efb96ee..e8ab065224 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -299,18 +299,9 @@ class Ostatus_profile extends Memcached_DataObject
             throw new ServerException("Remote groups can't subscribe to local users");
         }
 
-        // @fixme use regular channels for subbing, once they accept remote profiles
-        $sub = new Subscription();
-        $sub->subscriber = $this->profile_id;
-        $sub->subscribed = $user->id;
-        $sub->created = common_sql_now(); // current time
+        Subscription::start($this->localProfile(), $user->getProfile());
 
-        if ($sub->insert()) {
-            // @fixme use subs_notify() if refactored to take profiles?
-            mail_subscribe_notify_profile($user, $this->localProfile());
-            return true;
-        }
-        return false;
+        return true;
     }
 
     /**
@@ -1127,7 +1118,6 @@ class Ostatus_profile extends Memcached_DataObject
         }
     }
 
-
     protected static function getActivityObjectNickname($object, $hints=array())
     {
         if ($object->poco) {

From c36bdc1ba535dc3e2dc9098dbe40735b1955d96d Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Wed, 24 Feb 2010 20:36:36 +0000
Subject: [PATCH 92/97] - break OMB profile update pings to a background queue
 - add event hooks to profile update pings - send Salmon pings with custom
 update-profile event to OStatus subscribees and groups (subscribers will see
 it on your next post) - fix OStatus queues with overlong transport names,
 should work on DB queues now - Ostatus_profile::notifyActivity() and
 ::notifyDeferred() now can take XML, Notice, or Activity for convenience

---
 lib/activity.php                              |  3 ++
 lib/profilequeuehandler.php                   | 48 +++++++++++++++++
 lib/queuemanager.php                          |  3 ++
 lib/util.php                                  | 14 +++--
 plugins/OStatus/OStatusPlugin.php             | 53 +++++++++++++++++--
 plugins/OStatus/actions/pushcallback.php      |  2 +-
 plugins/OStatus/classes/HubSub.php            |  2 +-
 plugins/OStatus/classes/Ostatus_profile.php   | 52 +++++++++++++++---
 ...euehandler.php => hubconfqueuehandler.php} |  4 +-
 plugins/OStatus/lib/ostatusqueuehandler.php   | 22 ++------
 ...ueuehandler.php => pushinqueuehandler.php} |  4 +-
 ...ueuehandler.php => salmonqueuehandler.php} |  4 +-
 12 files changed, 170 insertions(+), 41 deletions(-)
 create mode 100644 lib/profilequeuehandler.php
 rename plugins/OStatus/lib/{hubverifyqueuehandler.php => hubconfqueuehandler.php} (95%)
 rename plugins/OStatus/lib/{pushinputqueuehandler.php => pushinqueuehandler.php} (94%)
 rename plugins/OStatus/lib/{salmonoutqueuehandler.php => salmonqueuehandler.php} (94%)

diff --git a/lib/activity.php b/lib/activity.php
index fa4ae02748..33932ad0ef 100644
--- a/lib/activity.php
+++ b/lib/activity.php
@@ -691,6 +691,9 @@ class ActivityVerb
     const UNFAVORITE = 'http://ostatus.org/schema/1.0/unfavorite';
     const UNFOLLOW   = 'http://ostatus.org/schema/1.0/unfollow';
     const LEAVE      = 'http://ostatus.org/schema/1.0/leave';
+
+    // For simple profile-update pings; no content to share.
+    const UPDATE_PROFILE = 'http://ostatus.org/schema/1.0/update-profile';
 }
 
 class ActivityContext
diff --git a/lib/profilequeuehandler.php b/lib/profilequeuehandler.php
new file mode 100644
index 0000000000..e8a00aef30
--- /dev/null
+++ b/lib/profilequeuehandler.php
@@ -0,0 +1,48 @@
+<?php
+/*
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @package QueueHandler
+ * @maintainer Brion Vibber <brion@status.net>
+ */
+
+class ProfileQueueHandler extends QueueHandler
+{
+
+    function transport()
+    {
+        return 'profile';
+    }
+
+    function handle($profile)
+    {
+        if (!($profile instanceof Profile)) {
+            common_log(LOG_ERR, "Got a bogus profile, not broadcasting");
+            return true;
+        }
+
+        if (Event::handle('StartBroadcastProfile', array($profile))) {
+            require_once(INSTALLDIR.'/lib/omb.php');
+            omb_broadcast_profile($profile);
+        }
+        Event::handle('EndBroadcastProfile', array($profile));
+        return true;
+    }
+
+}
diff --git a/lib/queuemanager.php b/lib/queuemanager.php
index 8f8c8f133f..9fdc801100 100644
--- a/lib/queuemanager.php
+++ b/lib/queuemanager.php
@@ -262,6 +262,9 @@ abstract class QueueManager extends IoManager
                 $this->connect('sms', 'SmsQueueHandler');
             }
 
+            // Broadcasting profile updates to OMB remote subscribers
+            $this->connect('profile', 'ProfileQueueHandler');
+
             // XMPP output handlers...
             if (common_config('xmpp', 'enabled')) {
                 // Delivery prep, read by queuedaemon.php:
diff --git a/lib/util.php b/lib/util.php
index 7fb2c6c4b0..9354431f27 100644
--- a/lib/util.php
+++ b/lib/util.php
@@ -1119,12 +1119,16 @@ function common_enqueue_notice($notice)
     return true;
 }
 
-function common_broadcast_profile($profile)
+/**
+ * Broadcast profile updates to OMB and other remote subscribers.
+ *
+ * Since this may be slow with a lot of subscribers or bad remote sites,
+ * this is run through the background queues if possible.
+ */
+function common_broadcast_profile(Profile $profile)
 {
-    // XXX: optionally use a queue system like http://code.google.com/p/microapps/wiki/NQDQ
-    require_once(INSTALLDIR.'/lib/omb.php');
-    omb_broadcast_profile($profile);
-    // XXX: Other broadcasts...?
+    $qm = QueueManager::get();
+    $qm->enqueue($profile, "profile");
     return true;
 }
 
diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 9376c048de..90abe034de 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -82,14 +82,14 @@ class OStatusPlugin extends Plugin
         $qm->connect('ostatus', 'OStatusQueueHandler');
 
         // Outgoing from our internal PuSH hub
-        $qm->connect('hubverify', 'HubVerifyQueueHandler');
+        $qm->connect('hubconf', 'HubConfQueueHandler');
         $qm->connect('hubout', 'HubOutQueueHandler');
 
         // Outgoing Salmon replies (when we don't need a return value)
-        $qm->connect('salmonout', 'SalmonOutQueueHandler');
+        $qm->connect('salmon', 'SalmonQueueHandler');
 
         // Incoming from a foreign PuSH hub
-        $qm->connect('pushinput', 'PushInputQueueHandler');
+        $qm->connect('pushin', 'PushInQueueHandler');
         return true;
     }
 
@@ -656,4 +656,51 @@ class OStatusPlugin extends Plugin
 
         return true;
     }
+
+    /**
+     * Ping remote profiles with updates to this profile.
+     * Salmon pings are queued for background processing.
+     */
+    function onEndBroadcastProfile(Profile $profile)
+    {
+        $user = User::staticGet('id', $profile->id);
+
+        // Find foreign accounts I'm subscribed to that support Salmon pings.
+        //
+        // @fixme we could run updates through the PuSH feed too,
+        // in which case we can skip Salmon pings to folks who
+        // are also subscribed to me.
+        $sql = "SELECT * FROM ostatus_profile " .
+               "WHERE profile_id IN " .
+               "(SELECT subscribed FROM subscription WHERE subscriber=%d) " .
+               "OR group_id IN " .
+               "(SELECT group_id FROM group_member WHERE profile_id=%d)";
+        $oprofile = new Ostatus_profile();
+        $oprofile->query(sprintf($sql, $profile->id, $profile->id));
+
+        if ($oprofile->N == 0) {
+            common_log(LOG_DEBUG, "No OStatus remote subscribees for $profile->nickname");
+            return true;
+        }
+
+        $act = new Activity();
+
+        $act->verb = ActivityVerb::UPDATE_PROFILE;
+        $act->id   = TagURI::mint('update-profile:%d:%s',
+                                  $profile->id,
+                                  common_date_iso8601(time()));
+        $act->time    = time();
+        $act->title   = _m("Profile update");
+        $act->content = sprintf(_m("%s has updated their profile page."),
+                               $profile->getBestName());
+
+        $act->actor   = ActivityObject::fromProfile($profile);
+        $act->object  = $act->actor;
+
+        while ($oprofile->fetch()) {
+            $oprofile->notifyDeferred($act);
+        }
+
+        return true;
+    }
 }
diff --git a/plugins/OStatus/actions/pushcallback.php b/plugins/OStatus/actions/pushcallback.php
index 4184f0e0c0..9a2067b8ca 100644
--- a/plugins/OStatus/actions/pushcallback.php
+++ b/plugins/OStatus/actions/pushcallback.php
@@ -68,7 +68,7 @@ class PushCallbackAction extends Action
                       'post' => $post,
                       'hmac' => $hmac);
         $qm = QueueManager::get();
-        $qm->enqueue($data, 'pushinput');
+        $qm->enqueue($data, 'pushin');
     }
     
     /**
diff --git a/plugins/OStatus/classes/HubSub.php b/plugins/OStatus/classes/HubSub.php
index eae2928c32..1ac181feeb 100644
--- a/plugins/OStatus/classes/HubSub.php
+++ b/plugins/OStatus/classes/HubSub.php
@@ -164,7 +164,7 @@ class HubSub extends Memcached_DataObject
                       'token' => $token,
                       'retries' => $retries);
         $qm = QueueManager::get();
-        $qm->enqueue($data, 'hubverify');
+        $qm->enqueue($data, 'hubconf');
     }
 
     /**
diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 9f9efb96ee..61505206ec 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -431,21 +431,57 @@ class Ostatus_profile extends Memcached_DataObject
         return false;
     }
 
-    public function notifyActivity($activity)
+    /**
+     * Send a Salmon notification ping immediately, and confirm that we got
+     * an acceptable response from the remote site.
+     *
+     * @param mixed $entry XML string, Notice, or Activity
+     * @return boolean success
+     */
+    public function notifyActivity($entry)
     {
         if ($this->salmonuri) {
-
-            $xml = '<?xml version="1.0" encoding="UTF-8" ?' . '>' .
-                          $activity->asString(true);
-
-            $salmon = new Salmon(); // ?
-
-            return $salmon->post($this->salmonuri, $xml);
+            $salmon = new Salmon();
+            return $salmon->post($this->salmonuri, $this->notifyPrepXml($entry));
         }
 
         return false;
     }
 
+    /**
+     * Queue a Salmon notification for later. If queues are disabled we'll
+     * send immediately but won't get the return value.
+     *
+     * @param mixed $entry XML string, Notice, or Activity
+     * @return boolean success
+     */
+    public function notifyDeferred($entry)
+    {
+        if ($this->salmonuri) {
+            $data = array('salmonuri' => $this->salmonuri,
+                          'entry' => $this->notifyPrepXml($entry));
+
+            $qm = QueueManager::get();
+            return $qm->enqueue($data, 'salmon');
+        }
+
+        return false;
+    }
+
+    protected function notifyPrepXml($entry)
+    {
+        $preamble = '<?xml version="1.0" encoding="UTF-8" ?' . '>';
+        if (is_string($entry)) {
+            return $entry;
+        } else if ($entry instanceof Activity) {
+            return $preamble . $entry->asString(true);
+        } else if ($entry instanceof Notice) {
+            return $preamble . $entry->asAtomEntry(true, true);
+        } else {
+            throw new ServerException("Invalid type passed to Ostatus_profile::notify; must be XML string or Activity entry");
+        }
+    }
+
     function getBestName()
     {
         if ($this->isGroup()) {
diff --git a/plugins/OStatus/lib/hubverifyqueuehandler.php b/plugins/OStatus/lib/hubconfqueuehandler.php
similarity index 95%
rename from plugins/OStatus/lib/hubverifyqueuehandler.php
rename to plugins/OStatus/lib/hubconfqueuehandler.php
index 7ce9e14312..c8e0b72fee 100644
--- a/plugins/OStatus/lib/hubverifyqueuehandler.php
+++ b/plugins/OStatus/lib/hubconfqueuehandler.php
@@ -22,11 +22,11 @@
  * @package Hub
  * @author Brion Vibber <brion@status.net>
  */
-class HubVerifyQueueHandler extends QueueHandler
+class HubConfQueueHandler extends QueueHandler
 {
     function transport()
     {
-        return 'hubverify';
+        return 'hubconf';
     }
 
     function handle($data)
diff --git a/plugins/OStatus/lib/ostatusqueuehandler.php b/plugins/OStatus/lib/ostatusqueuehandler.php
index c1e50bffa1..0da85600fb 100644
--- a/plugins/OStatus/lib/ostatusqueuehandler.php
+++ b/plugins/OStatus/lib/ostatusqueuehandler.php
@@ -83,23 +83,11 @@ class OStatusQueueHandler extends QueueHandler
     function pingReply($oprofile)
     {
         if ($this->user) {
-            if (!empty($oprofile->salmonuri)) {
-                // For local posts, send a Salmon ping to the mentioned
-                // remote user or group.
-                // @fixme as an optimization we can skip this if the
-                // remote profile is subscribed to the author.
-
-                common_log(LOG_INFO, "Prepping to send notice '{$this->notice->uri}' to remote profile '{$oprofile->uri}'.");
-
-                $xml = '<?xml version="1.0" encoding="UTF-8" ?' . '>';
-                $xml .= $this->notice->asAtomEntry(true, true);
-
-                $data = array('salmonuri' => $oprofile->salmonuri,
-                              'entry' => $xml);
-
-                $qm = QueueManager::get();
-                $qm->enqueue($data, 'salmonout');
-            }
+            // For local posts, send a Salmon ping to the mentioned
+            // remote user or group.
+            // @fixme as an optimization we can skip this if the
+            // remote profile is subscribed to the author.
+            $oprofile->notifyDeferred($this->notice);
         }
     }
 
diff --git a/plugins/OStatus/lib/pushinputqueuehandler.php b/plugins/OStatus/lib/pushinqueuehandler.php
similarity index 94%
rename from plugins/OStatus/lib/pushinputqueuehandler.php
rename to plugins/OStatus/lib/pushinqueuehandler.php
index cbd9139b50..a90f52df26 100644
--- a/plugins/OStatus/lib/pushinputqueuehandler.php
+++ b/plugins/OStatus/lib/pushinqueuehandler.php
@@ -23,11 +23,11 @@
  * @author Brion Vibber <brion@status.net>
  */
 
-class PushInputQueueHandler extends QueueHandler
+class PushInQueueHandler extends QueueHandler
 {
     function transport()
     {
-        return 'pushinput';
+        return 'pushin';
     }
 
     function handle($data)
diff --git a/plugins/OStatus/lib/salmonoutqueuehandler.php b/plugins/OStatus/lib/salmonqueuehandler.php
similarity index 94%
rename from plugins/OStatus/lib/salmonoutqueuehandler.php
rename to plugins/OStatus/lib/salmonqueuehandler.php
index 536ff94af6..aa97018dc9 100644
--- a/plugins/OStatus/lib/salmonoutqueuehandler.php
+++ b/plugins/OStatus/lib/salmonqueuehandler.php
@@ -22,11 +22,11 @@
  * @package OStatusPlugin
  * @author Brion Vibber <brion@status.net>
  */
-class SalmonOutQueueHandler extends QueueHandler
+class SalmonQueueHandler extends QueueHandler
 {
     function transport()
     {
-        return 'salmonout';
+        return 'salmon';
     }
 
     function handle($data)

From c0d13097dd96b3596b43e34e7fff0acd97a838f0 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Wed, 24 Feb 2010 15:54:13 -0500
Subject: [PATCH 93/97] use Notice::bestUrl() to determine notice url in
 NoticeListItem::showNoticeLink()

---
 lib/noticelist.php | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/lib/noticelist.php b/lib/noticelist.php
index dcf17be08c..28a563d875 100644
--- a/lib/noticelist.php
+++ b/lib/noticelist.php
@@ -380,12 +380,12 @@ class NoticeListItem extends Widget
 
     function showNoticeLink()
     {
-        if($this->notice->is_local == Notice::LOCAL_PUBLIC || $this->notice->is_local == Notice::LOCAL_NONPUBLIC){
-            $noticeurl = common_local_url('shownotice',
-                                      array('notice' => $this->notice->id));
-        }else{
-            $noticeurl = $this->notice->uri;
-        }
+        $noticeurl = $this->notice->bestUrl();
+
+        // above should always return an URL
+
+        assert(!empty($noticeurl));
+
         $this->out->elementStart('a', array('rel' => 'bookmark',
                                             'class' => 'timestamp',
                                             'href' => $noticeurl));

From ec4899e6179f2d9b368e6fc04041dd72c2ac2596 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Wed, 24 Feb 2010 22:16:17 +0000
Subject: [PATCH 94/97] OStatus: disable HTMLPurify cache unless we've
 configured a writable path for it. Updated plugin README with available
 config options. Cleanup for a bad element fallback lookup in Activity

---
 lib/activity.php                            | 26 ++++++-----
 plugins/OStatus/README                      | 50 +++++++++++++--------
 plugins/OStatus/classes/Ostatus_profile.php | 22 ++++++++-
 3 files changed, 66 insertions(+), 32 deletions(-)

diff --git a/lib/activity.php b/lib/activity.php
index 33932ad0ef..25727bf2b5 100644
--- a/lib/activity.php
+++ b/lib/activity.php
@@ -167,16 +167,18 @@ class PoCo
             PoCo::NS
         );
 
-        $formatted = ActivityUtils::childContent(
-            $addressEl,
-            PoCoAddress::FORMATTED,
-            self::NS
-        );
+        if (!empty($addressEl)) {
+            $formatted = ActivityUtils::childContent(
+                $addressEl,
+                PoCoAddress::FORMATTED,
+                self::NS
+            );
 
-        if (!empty($formatted)) {
-            $address = new PoCoAddress();
-            $address->formatted = $formatted;
-            return $address;
+            if (!empty($formatted)) {
+                $address = new PoCoAddress();
+                $address->formatted = $formatted;
+                return $address;
+            }
         }
 
         return null;
@@ -292,7 +294,7 @@ class ActivityUtils
      * @return string related link, if any
      */
 
-    static function getLink($element, $rel, $type=null)
+    static function getLink(DOMNode $element, $rel, $type=null)
     {
         $links = $element->getElementsByTagnameNS(self::ATOM, self::LINK);
 
@@ -320,7 +322,7 @@ class ActivityUtils
      * @return DOMElement found element or null
      */
 
-    static function child($element, $tag, $namespace=self::ATOM)
+    static function child(DOMNode $element, $tag, $namespace=self::ATOM)
     {
         $els = $element->childNodes;
         if (empty($els) || $els->length == 0) {
@@ -345,7 +347,7 @@ class ActivityUtils
      * @return string content of the child
      */
 
-    static function childContent($element, $tag, $namespace=self::ATOM)
+    static function childContent(DOMNode $element, $tag, $namespace=self::ATOM)
     {
         $el = self::child($element, $tag, $namespace);
 
diff --git a/plugins/OStatus/README b/plugins/OStatus/README
index cbf3adbb9c..09a59e3497 100644
--- a/plugins/OStatus/README
+++ b/plugins/OStatus/README
@@ -2,23 +2,37 @@ Plugin to support importing updates from external RSS and Atom feeds into your t
 
 Uses PubSubHubbub for push feed updates; currently non-PuSH feeds cannot be subscribed.
 
+Configuration options available:
+
+$config['ostatus']['hub']
+    (default internal hub)
+    Set to URL of an external PuSH hub to use it instead of our internal hub.
+
+$config['ostatus']['hub_retries']
+    (default 0)
+    Number of times to retry a PuSH send to consumers if using internal hub
+
+$config['ostatus']['purify_cache']
+    (default cache disabled)
+    Set to a writable cache directory for HTMLPurifier's configuration settings, can speed up processing of remote messages (have not tested by how much)
+
+
+For testing, shouldn't be used in production:
+
+$config['ostatus']['skip_signatures']
+    (default use signatures)
+    Disable generation and validation of Salmon magicenv signatures
+
+$config['feedsub']['nohub']
+    (default require hub)
+    Allow low-level feed subscription setup for feeds without hubs.
+    Not actually usable at this stage, OStatus will check for hubs too
+    and we have no polling backend.
+
+
 Todo:
-* set feed icon avatar for actual profiles as well as for preview
-* use channel image and/or favicon for avatar?
-* garbage-collect subscriptions that are no longer being used
-* administrative way to kill feeds?
-* functional l10n
-* clean up subscription form look and workflow
-* use ajax for test/preview in subscription form
-* rssCloud support? (Does anything use it that doesn't support PuSH as well?)
-* possibly a polling daemon to support non-PuSH feeds?
-* likely problems with multiple feeds from the same site, such as category feeds on a blog
-  (currently each feed would publish a separate notice on a separate profile, but pointing to the same post URI.)
-  (could use the local URI I guess, but that's so icky!)
-* problems with Atom feeds that list <link rel="alternate" href="..."/> but don't have the type
-  (such as http://atomgen.appspot.com/feed/5 demo feed); currently it's not recognized and we end up with the feed's master URI
-* make it easier to see what you're subscribed to and unsub from things
-* saner treatment of fullname/nickname?
+* fully functional l10n
+* redo non-OStatus feed support
+** rssCloud support?
+** possibly a polling daemon to support non-PuSH feeds?
 * make use of tags/categories from feeds
-* update feed profile data when it changes
-* XML_Feed_Parser has major problems with category and link tags; consider replacing?
diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 5e38a523ea..c755a094e6 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -668,9 +668,27 @@ class Ostatus_profile extends Memcached_DataObject
      */
     protected function purify($html)
     {
-        // @fixme disable caching or set a sane temp dir
         require_once(INSTALLDIR.'/extlib/HTMLPurifier/HTMLPurifier.auto.php');
-        $purifier = new HTMLPurifier();
+
+        // By default Purifier wants to cache data to its own code directories,
+        // and spews error messages if they're not writable.
+        $config = HTMLPurifier_Config::createDefault();
+        if (common_config('ostatus', 'purify_cache')) {
+            $config->set('Cache.SerializerPath', common_config('ostatus', 'purify_cache'));
+        } else {
+            // Although recommended in the documentation, this produces a notice:
+            //    "Core.DefinitionCache is an alias, preferred directive name is Cache.DefinitionImpl"
+            // If I then follow *those* directions, I get a warning and it doesn't work:
+            //    "Cannot set undefined directive Core.DefinitionImpl"
+            // So... lesser of two evils. Suppressing the notice from output,
+            // though it'll still be seen and logged by StatusNet's error handler.
+            $old = error_reporting();
+            error_reporting($old & ~E_NOTICE);
+            $config->set('Core.DefinitionCache', null);
+            error_reporting($old);
+        }
+
+        $purifier = new HTMLPurifier($config);
         return $purifier->purify($html);
     }
 

From b782225ade7ac213222882513d89008902910256 Mon Sep 17 00:00:00 2001
From: Sarven Capadisli <csarven@status.net>
Date: Thu, 25 Feb 2010 00:10:36 +0100
Subject: [PATCH 95/97] Revert "Updated jQuery Form Plugin from v2.17 to v2.36"

This reverts commit 72037d61436978daa1edbd19d52b7e6fc6ae1fa8.

Until some of the XHR notice related bugs are sorted out in Opera and
Chromium, reverting back to the previous version. It throws slightly
less errors. XHR file attachments is still a bit problematic in
Opera 10.10/Ubuntu, Opera 10.10/Windows, and Chrome 4/Ubuntu. But this
revert will at least allow regular XHR notices to work okay in Opera
and Chromium.

Standards suck!
---
 js/jquery.form.js | 1292 ++++++++++++++++++++++-----------------------
 1 file changed, 632 insertions(+), 660 deletions(-)

diff --git a/js/jquery.form.js b/js/jquery.form.js
index dde394270f..936b847abe 100644
--- a/js/jquery.form.js
+++ b/js/jquery.form.js
@@ -1,660 +1,632 @@
-/*
- * jQuery Form Plugin
- * version: 2.36 (07-NOV-2009)
- * @requires jQuery v1.2.6 or later
- *
- * Examples and documentation at: http://malsup.com/jquery/form/
- * Dual licensed under the MIT and GPL licenses:
- *   http://www.opensource.org/licenses/mit-license.php
- *   http://www.gnu.org/licenses/gpl.html
- */
-;(function($) {
-
-/*
-	Usage Note:
-	-----------
-	Do not use both ajaxSubmit and ajaxForm on the same form.  These
-	functions are intended to be exclusive.  Use ajaxSubmit if you want
-	to bind your own submit handler to the form.  For example,
-
-	$(document).ready(function() {
-		$('#myForm').bind('submit', function() {
-			$(this).ajaxSubmit({
-				target: '#output'
-			});
-			return false; // <-- important!
-		});
-	});
-
-	Use ajaxForm when you want the plugin to manage all the event binding
-	for you.  For example,
-
-	$(document).ready(function() {
-		$('#myForm').ajaxForm({
-			target: '#output'
-		});
-	});
-
-	When using ajaxForm, the ajaxSubmit function will be invoked for you
-	at the appropriate time.
-*/
-
-/**
- * ajaxSubmit() provides a mechanism for immediately submitting
- * an HTML form using AJAX.
- */
-$.fn.ajaxSubmit = function(options) {
-	// fast fail if nothing selected (http://dev.jquery.com/ticket/2752)
-	if (!this.length) {
-		log('ajaxSubmit: skipping submit process - no element selected');
-		return this;
-	}
-
-	if (typeof options == 'function')
-		options = { success: options };
-
-	var url = $.trim(this.attr('action'));
-	if (url) {
-		// clean url (don't include hash vaue)
-		url = (url.match(/^([^#]+)/)||[])[1];
-   	}
-   	url = url || window.location.href || '';
-
-	options = $.extend({
-		url:  url,
-		type: this.attr('method') || 'GET',
-		iframeSrc: /^https/i.test(window.location.href || '') ? 'javascript:false' : 'about:blank'
-	}, options || {});
-
-	// hook for manipulating the form data before it is extracted;
-	// convenient for use with rich editors like tinyMCE or FCKEditor
-	var veto = {};
-	this.trigger('form-pre-serialize', [this, options, veto]);
-	if (veto.veto) {
-		log('ajaxSubmit: submit vetoed via form-pre-serialize trigger');
-		return this;
-	}
-
-	// provide opportunity to alter form data before it is serialized
-	if (options.beforeSerialize && options.beforeSerialize(this, options) === false) {
-		log('ajaxSubmit: submit aborted via beforeSerialize callback');
-		return this;
-	}
-
-	var a = this.formToArray(options.semantic);
-	if (options.data) {
-		options.extraData = options.data;
-		for (var n in options.data) {
-		  if(options.data[n] instanceof Array) {
-			for (var k in options.data[n])
-			  a.push( { name: n, value: options.data[n][k] } );
-		  }
-		  else
-			 a.push( { name: n, value: options.data[n] } );
-		}
-	}
-
-	// give pre-submit callback an opportunity to abort the submit
-	if (options.beforeSubmit && options.beforeSubmit(a, this, options) === false) {
-		log('ajaxSubmit: submit aborted via beforeSubmit callback');
-		return this;
-	}
-
-	// fire vetoable 'validate' event
-	this.trigger('form-submit-validate', [a, this, options, veto]);
-	if (veto.veto) {
-		log('ajaxSubmit: submit vetoed via form-submit-validate trigger');
-		return this;
-	}
-
-	var q = $.param(a);
-
-	if (options.type.toUpperCase() == 'GET') {
-		options.url += (options.url.indexOf('?') >= 0 ? '&' : '?') + q;
-		options.data = null;  // data is null for 'get'
-	}
-	else
-		options.data = q; // data is the query string for 'post'
-
-	var $form = this, callbacks = [];
-	if (options.resetForm) callbacks.push(function() { $form.resetForm(); });
-	if (options.clearForm) callbacks.push(function() { $form.clearForm(); });
-
-	// perform a load on the target only if dataType is not provided
-	if (!options.dataType && options.target) {
-		var oldSuccess = options.success || function(){};
-		callbacks.push(function(data) {
-			$(options.target).html(data).each(oldSuccess, arguments);
-		});
-	}
-	else if (options.success)
-		callbacks.push(options.success);
-
-	options.success = function(data, status) {
-		for (var i=0, max=callbacks.length; i < max; i++)
-			callbacks[i].apply(options, [data, status, $form]);
-	};
-
-	// are there files to upload?
-	var files = $('input:file', this).fieldValue();
-	var found = false;
-	for (var j=0; j < files.length; j++)
-		if (files[j])
-			found = true;
-
-	var multipart = false;
-//	var mp = 'multipart/form-data';
-//	multipart = ($form.attr('enctype') == mp || $form.attr('encoding') == mp);
-
-	// options.iframe allows user to force iframe mode
-	// 06-NOV-09: now defaulting to iframe mode if file input is detected
-   if ((files.length && options.iframe !== false) || options.iframe || found || multipart) {
-	   // hack to fix Safari hang (thanks to Tim Molendijk for this)
-	   // see:  http://groups.google.com/group/jquery-dev/browse_thread/thread/36395b7ab510dd5d
-	   if (options.closeKeepAlive)
-		   $.get(options.closeKeepAlive, fileUpload);
-	   else
-		   fileUpload();
-	   }
-   else
-	   $.ajax(options);
-
-	// fire 'notify' event
-	this.trigger('form-submit-notify', [this, options]);
-	return this;
-
-
-	// private function for handling file uploads (hat tip to YAHOO!)
-	function fileUpload() {
-		var form = $form[0];
-
-		if ($(':input[name=submit]', form).length) {
-			alert('Error: Form elements must not be named "submit".');
-			return;
-		}
-
-		var opts = $.extend({}, $.ajaxSettings, options);
-		var s = $.extend(true, {}, $.extend(true, {}, $.ajaxSettings), opts);
-
-		var id = 'jqFormIO' + (new Date().getTime());
-		var $io = $('<iframe id="' + id + '" name="' + id + '" src="'+ opts.iframeSrc +'" />');
-		var io = $io[0];
-
-		$io.css({ position: 'absolute', top: '-1000px', left: '-1000px' });
-
-		var xhr = { // mock object
-			aborted: 0,
-			responseText: null,
-			responseXML: null,
-			status: 0,
-			statusText: 'n/a',
-			getAllResponseHeaders: function() {},
-			getResponseHeader: function() {},
-			setRequestHeader: function() {},
-			abort: function() {
-				this.aborted = 1;
-				$io.attr('src', opts.iframeSrc); // abort op in progress
-			}
-		};
-
-		var g = opts.global;
-		// trigger ajax global events so that activity/block indicators work like normal
-		if (g && ! $.active++) $.event.trigger("ajaxStart");
-		if (g) $.event.trigger("ajaxSend", [xhr, opts]);
-
-		if (s.beforeSend && s.beforeSend(xhr, s) === false) {
-			s.global && $.active--;
-			return;
-		}
-		if (xhr.aborted)
-			return;
-
-		var cbInvoked = 0;
-		var timedOut = 0;
-
-		// add submitting element to data if we know it
-		var sub = form.clk;
-		if (sub) {
-			var n = sub.name;
-			if (n && !sub.disabled) {
-				options.extraData = options.extraData || {};
-				options.extraData[n] = sub.value;
-				if (sub.type == "image") {
-					options.extraData[name+'.x'] = form.clk_x;
-					options.extraData[name+'.y'] = form.clk_y;
-				}
-			}
-		}
-
-		// take a breath so that pending repaints get some cpu time before the upload starts
-		setTimeout(function() {
-			// make sure form attrs are set
-			var t = $form.attr('target'), a = $form.attr('action');
-
-			// update form attrs in IE friendly way
-			form.setAttribute('target',id);
-			if (form.getAttribute('method') != 'POST')
-				form.setAttribute('method', 'POST');
-			if (form.getAttribute('action') != opts.url)
-				form.setAttribute('action', opts.url);
-
-			// ie borks in some cases when setting encoding
-			if (! options.skipEncodingOverride) {
-				$form.attr({
-					encoding: 'multipart/form-data',
-					enctype:  'multipart/form-data'
-				});
-			}
-
-			// support timout
-			if (opts.timeout)
-				setTimeout(function() { timedOut = true; cb(); }, opts.timeout);
-
-			// add "extra" data to form if provided in options
-			var extraInputs = [];
-			try {
-				if (options.extraData)
-					for (var n in options.extraData)
-						extraInputs.push(
-							$('<input type="hidden" name="'+n+'" value="'+options.extraData[n]+'" />')
-								.appendTo(form)[0]);
-
-				// add iframe to doc and submit the form
-				$io.appendTo('body');
-				io.attachEvent ? io.attachEvent('onload', cb) : io.addEventListener('load', cb, false);
-				form.submit();
-			}
-			finally {
-				// reset attrs and remove "extra" input elements
-				form.setAttribute('action',a);
-				t ? form.setAttribute('target', t) : $form.removeAttr('target');
-				$(extraInputs).remove();
-			}
-		}, 10);
-
-		var domCheckCount = 50;
-
-		function cb() {
-			if (cbInvoked++) return;
-
-			io.detachEvent ? io.detachEvent('onload', cb) : io.removeEventListener('load', cb, false);
-
-			var ok = true;
-			try {
-				if (timedOut) throw 'timeout';
-				// extract the server response from the iframe
-				var data, doc;
-
-				doc = io.contentWindow ? io.contentWindow.document : io.contentDocument ? io.contentDocument : io.document;
-				
-				var isXml = opts.dataType == 'xml' || doc.XMLDocument || $.isXMLDoc(doc);
-				log('isXml='+isXml);
-				if (!isXml && (doc.body == null || doc.body.innerHTML == '')) {
-				 	if (--domCheckCount) {
-						// in some browsers (Opera) the iframe DOM is not always traversable when
-						// the onload callback fires, so we loop a bit to accommodate
-						cbInvoked = 0;
-						setTimeout(cb, 100);
-						return;
-					}
-					log('Could not access iframe DOM after 50 tries.');
-					return;
-				}
-
-				xhr.responseText = doc.body ? doc.body.innerHTML : null;
-				xhr.responseXML = doc.XMLDocument ? doc.XMLDocument : doc;
-				xhr.getResponseHeader = function(header){
-					var headers = {'content-type': opts.dataType};
-					return headers[header];
-				};
-
-				if (opts.dataType == 'json' || opts.dataType == 'script') {
-					// see if user embedded response in textarea
-					var ta = doc.getElementsByTagName('textarea')[0];
-					if (ta)
-						xhr.responseText = ta.value;
-					else {
-						// account for browsers injecting pre around json response
-						var pre = doc.getElementsByTagName('pre')[0];
-						if (pre)
-							xhr.responseText = pre.innerHTML;
-					}			  
-				}
-				else if (opts.dataType == 'xml' && !xhr.responseXML && xhr.responseText != null) {
-					xhr.responseXML = toXml(xhr.responseText);
-				}
-				data = $.httpData(xhr, opts.dataType);
-			}
-			catch(e){
-				ok = false;
-				$.handleError(opts, xhr, 'error', e);
-			}
-
-			// ordering of these callbacks/triggers is odd, but that's how $.ajax does it
-			if (ok) {
-				opts.success(data, 'success');
-				if (g) $.event.trigger("ajaxSuccess", [xhr, opts]);
-			}
-			if (g) $.event.trigger("ajaxComplete", [xhr, opts]);
-			if (g && ! --$.active) $.event.trigger("ajaxStop");
-			if (opts.complete) opts.complete(xhr, ok ? 'success' : 'error');
-
-			// clean up
-			setTimeout(function() {
-				$io.remove();
-				xhr.responseXML = null;
-			}, 100);
-		};
-
-		function toXml(s, doc) {
-			if (window.ActiveXObject) {
-				doc = new ActiveXObject('Microsoft.XMLDOM');
-				doc.async = 'false';
-				doc.loadXML(s);
-			}
-			else
-				doc = (new DOMParser()).parseFromString(s, 'text/xml');
-			return (doc && doc.documentElement && doc.documentElement.tagName != 'parsererror') ? doc : null;
-		};
-	};
-};
-
-/**
- * ajaxForm() provides a mechanism for fully automating form submission.
- *
- * The advantages of using this method instead of ajaxSubmit() are:
- *
- * 1: This method will include coordinates for <input type="image" /> elements (if the element
- *	is used to submit the form).
- * 2. This method will include the submit element's name/value data (for the element that was
- *	used to submit the form).
- * 3. This method binds the submit() method to the form for you.
- *
- * The options argument for ajaxForm works exactly as it does for ajaxSubmit.  ajaxForm merely
- * passes the options argument along after properly binding events for submit elements and
- * the form itself.
- */
-$.fn.ajaxForm = function(options) {
-	return this.ajaxFormUnbind().bind('submit.form-plugin', function() {
-		$(this).ajaxSubmit(options);
-		return false;
-	}).bind('click.form-plugin', function(e) {
-		var target = e.target;
-		var $el = $(target);
-		if (!($el.is(":submit,input:image"))) {
-			// is this a child element of the submit el?  (ex: a span within a button)
-			var t = $el.closest(':submit');
-			if (t.length == 0)
-				return;
-			target = t[0];
-		}
-		var form = this;
-		form.clk = target;
-		if (target.type == 'image') {
-			if (e.offsetX != undefined) {
-				form.clk_x = e.offsetX;
-				form.clk_y = e.offsetY;
-			} else if (typeof $.fn.offset == 'function') { // try to use dimensions plugin
-				var offset = $el.offset();
-				form.clk_x = e.pageX - offset.left;
-				form.clk_y = e.pageY - offset.top;
-			} else {
-				form.clk_x = e.pageX - target.offsetLeft;
-				form.clk_y = e.pageY - target.offsetTop;
-			}
-		}
-		// clear form vars
-		setTimeout(function() { form.clk = form.clk_x = form.clk_y = null; }, 100);
-	});
-};
-
-// ajaxFormUnbind unbinds the event handlers that were bound by ajaxForm
-$.fn.ajaxFormUnbind = function() {
-	return this.unbind('submit.form-plugin click.form-plugin');
-};
-
-/**
- * formToArray() gathers form element data into an array of objects that can
- * be passed to any of the following ajax functions: $.get, $.post, or load.
- * Each object in the array has both a 'name' and 'value' property.  An example of
- * an array for a simple login form might be:
- *
- * [ { name: 'username', value: 'jresig' }, { name: 'password', value: 'secret' } ]
- *
- * It is this array that is passed to pre-submit callback functions provided to the
- * ajaxSubmit() and ajaxForm() methods.
- */
-$.fn.formToArray = function(semantic) {
-	var a = [];
-	if (this.length == 0) return a;
-
-	var form = this[0];
-	var els = semantic ? form.getElementsByTagName('*') : form.elements;
-	if (!els) return a;
-	for(var i=0, max=els.length; i < max; i++) {
-		var el = els[i];
-		var n = el.name;
-		if (!n) continue;
-
-		if (semantic && form.clk && el.type == "image") {
-			// handle image inputs on the fly when semantic == true
-			if(!el.disabled && form.clk == el) {
-				a.push({name: n, value: $(el).val()});
-				a.push({name: n+'.x', value: form.clk_x}, {name: n+'.y', value: form.clk_y});
-			}
-			continue;
-		}
-
-		var v = $.fieldValue(el, true);
-		if (v && v.constructor == Array) {
-			for(var j=0, jmax=v.length; j < jmax; j++)
-				a.push({name: n, value: v[j]});
-		}
-		else if (v !== null && typeof v != 'undefined')
-			a.push({name: n, value: v});
-	}
-
-	if (!semantic && form.clk) {
-		// input type=='image' are not found in elements array! handle it here
-		var $input = $(form.clk), input = $input[0], n = input.name;
-		if (n && !input.disabled && input.type == 'image') {
-			a.push({name: n, value: $input.val()});
-			a.push({name: n+'.x', value: form.clk_x}, {name: n+'.y', value: form.clk_y});
-		}
-	}
-	return a;
-};
-
-/**
- * Serializes form data into a 'submittable' string. This method will return a string
- * in the format: name1=value1&amp;name2=value2
- */
-$.fn.formSerialize = function(semantic) {
-	//hand off to jQuery.param for proper encoding
-	return $.param(this.formToArray(semantic));
-};
-
-/**
- * Serializes all field elements in the jQuery object into a query string.
- * This method will return a string in the format: name1=value1&amp;name2=value2
- */
-$.fn.fieldSerialize = function(successful) {
-	var a = [];
-	this.each(function() {
-		var n = this.name;
-		if (!n) return;
-		var v = $.fieldValue(this, successful);
-		if (v && v.constructor == Array) {
-			for (var i=0,max=v.length; i < max; i++)
-				a.push({name: n, value: v[i]});
-		}
-		else if (v !== null && typeof v != 'undefined')
-			a.push({name: this.name, value: v});
-	});
-	//hand off to jQuery.param for proper encoding
-	return $.param(a);
-};
-
-/**
- * Returns the value(s) of the element in the matched set.  For example, consider the following form:
- *
- *  <form><fieldset>
- *	  <input name="A" type="text" />
- *	  <input name="A" type="text" />
- *	  <input name="B" type="checkbox" value="B1" />
- *	  <input name="B" type="checkbox" value="B2"/>
- *	  <input name="C" type="radio" value="C1" />
- *	  <input name="C" type="radio" value="C2" />
- *  </fieldset></form>
- *
- *  var v = $(':text').fieldValue();
- *  // if no values are entered into the text inputs
- *  v == ['','']
- *  // if values entered into the text inputs are 'foo' and 'bar'
- *  v == ['foo','bar']
- *
- *  var v = $(':checkbox').fieldValue();
- *  // if neither checkbox is checked
- *  v === undefined
- *  // if both checkboxes are checked
- *  v == ['B1', 'B2']
- *
- *  var v = $(':radio').fieldValue();
- *  // if neither radio is checked
- *  v === undefined
- *  // if first radio is checked
- *  v == ['C1']
- *
- * The successful argument controls whether or not the field element must be 'successful'
- * (per http://www.w3.org/TR/html4/interact/forms.html#successful-controls).
- * The default value of the successful argument is true.  If this value is false the value(s)
- * for each element is returned.
- *
- * Note: This method *always* returns an array.  If no valid value can be determined the
- *	   array will be empty, otherwise it will contain one or more values.
- */
-$.fn.fieldValue = function(successful) {
-	for (var val=[], i=0, max=this.length; i < max; i++) {
-		var el = this[i];
-		var v = $.fieldValue(el, successful);
-		if (v === null || typeof v == 'undefined' || (v.constructor == Array && !v.length))
-			continue;
-		v.constructor == Array ? $.merge(val, v) : val.push(v);
-	}
-	return val;
-};
-
-/**
- * Returns the value of the field element.
- */
-$.fieldValue = function(el, successful) {
-	var n = el.name, t = el.type, tag = el.tagName.toLowerCase();
-	if (typeof successful == 'undefined') successful = true;
-
-	if (successful && (!n || el.disabled || t == 'reset' || t == 'button' ||
-		(t == 'checkbox' || t == 'radio') && !el.checked ||
-		(t == 'submit' || t == 'image') && el.form && el.form.clk != el ||
-		tag == 'select' && el.selectedIndex == -1))
-			return null;
-
-	if (tag == 'select') {
-		var index = el.selectedIndex;
-		if (index < 0) return null;
-		var a = [], ops = el.options;
-		var one = (t == 'select-one');
-		var max = (one ? index+1 : ops.length);
-		for(var i=(one ? index : 0); i < max; i++) {
-			var op = ops[i];
-			if (op.selected) {
-				var v = op.value;
-				if (!v) // extra pain for IE...
-					v = (op.attributes && op.attributes['value'] && !(op.attributes['value'].specified)) ? op.text : op.value;
-				if (one) return v;
-				a.push(v);
-			}
-		}
-		return a;
-	}
-	return el.value;
-};
-
-/**
- * Clears the form data.  Takes the following actions on the form's input fields:
- *  - input text fields will have their 'value' property set to the empty string
- *  - select elements will have their 'selectedIndex' property set to -1
- *  - checkbox and radio inputs will have their 'checked' property set to false
- *  - inputs of type submit, button, reset, and hidden will *not* be effected
- *  - button elements will *not* be effected
- */
-$.fn.clearForm = function() {
-	return this.each(function() {
-		$('input,select,textarea', this).clearFields();
-	});
-};
-
-/**
- * Clears the selected form elements.
- */
-$.fn.clearFields = $.fn.clearInputs = function() {
-	return this.each(function() {
-		var t = this.type, tag = this.tagName.toLowerCase();
-		if (t == 'text' || t == 'password' || tag == 'textarea')
-			this.value = '';
-		else if (t == 'checkbox' || t == 'radio')
-			this.checked = false;
-		else if (tag == 'select')
-			this.selectedIndex = -1;
-	});
-};
-
-/**
- * Resets the form data.  Causes all form elements to be reset to their original value.
- */
-$.fn.resetForm = function() {
-	return this.each(function() {
-		// guard against an input with the name of 'reset'
-		// note that IE reports the reset function as an 'object'
-		if (typeof this.reset == 'function' || (typeof this.reset == 'object' && !this.reset.nodeType))
-			this.reset();
-	});
-};
-
-/**
- * Enables or disables any matching elements.
- */
-$.fn.enable = function(b) {
-	if (b == undefined) b = true;
-	return this.each(function() {
-		this.disabled = !b;
-	});
-};
-
-/**
- * Checks/unchecks any matching checkboxes or radio buttons and
- * selects/deselects and matching option elements.
- */
-$.fn.selected = function(select) {
-	if (select == undefined) select = true;
-	return this.each(function() {
-		var t = this.type;
-		if (t == 'checkbox' || t == 'radio')
-			this.checked = select;
-		else if (this.tagName.toLowerCase() == 'option') {
-			var $sel = $(this).parent('select');
-			if (select && $sel[0] && $sel[0].type == 'select-one') {
-				// deselect all other options
-				$sel.find('option').selected(false);
-			}
-			this.selected = select;
-		}
-	});
-};
-
-// helper fn for console logging
-// set $.fn.ajaxSubmit.debug to true to enable debug logging
-function log() {
-	if ($.fn.ajaxSubmit.debug && window.console && window.console.log)
-		window.console.log('[jquery.form] ' + Array.prototype.join.call(arguments,''));
-};
-
-})(jQuery);
+/*
+ * jQuery Form Plugin
+ * version: 2.17 (06-NOV-2008)
+ * @requires jQuery v1.2.2 or later
+ *
+ * Examples and documentation at: http://malsup.com/jquery/form/
+ * Dual licensed under the MIT and GPL licenses:
+ *   http://www.opensource.org/licenses/mit-license.php
+ *   http://www.gnu.org/licenses/gpl.html
+ *
+ * Revision: $Id$
+ */
+;(function($) {
+
+/*
+    Usage Note:  
+    -----------
+    Do not use both ajaxSubmit and ajaxForm on the same form.  These
+    functions are intended to be exclusive.  Use ajaxSubmit if you want
+    to bind your own submit handler to the form.  For example,
+
+    $(document).ready(function() {
+        $('#myForm').bind('submit', function() {
+            $(this).ajaxSubmit({
+                target: '#output'
+            });
+            return false; // <-- important!
+        });
+    });
+
+    Use ajaxForm when you want the plugin to manage all the event binding
+    for you.  For example,
+
+    $(document).ready(function() {
+        $('#myForm').ajaxForm({
+            target: '#output'
+        });
+    });
+        
+    When using ajaxForm, the ajaxSubmit function will be invoked for you
+    at the appropriate time.  
+*/
+
+/**
+ * ajaxSubmit() provides a mechanism for immediately submitting 
+ * an HTML form using AJAX.
+ */
+$.fn.ajaxSubmit = function(options) {
+    // fast fail if nothing selected (http://dev.jquery.com/ticket/2752)
+    if (!this.length) {
+        log('ajaxSubmit: skipping submit process - no element selected');
+        return this;
+    }
+
+    if (typeof options == 'function')
+        options = { success: options };
+
+    options = $.extend({
+        url:  this.attr('action') || window.location.toString(),
+        type: this.attr('method') || 'GET'
+    }, options || {});
+
+    // hook for manipulating the form data before it is extracted;
+    // convenient for use with rich editors like tinyMCE or FCKEditor
+    var veto = {};
+    this.trigger('form-pre-serialize', [this, options, veto]);
+    if (veto.veto) {
+        log('ajaxSubmit: submit vetoed via form-pre-serialize trigger');
+        return this;
+    }
+
+    // provide opportunity to alter form data before it is serialized
+    if (options.beforeSerialize && options.beforeSerialize(this, options) === false) {
+        log('ajaxSubmit: submit aborted via beforeSerialize callback');
+        return this;
+    }    
+   
+    var a = this.formToArray(options.semantic);
+    if (options.data) {
+        options.extraData = options.data;
+        for (var n in options.data) {
+          if(options.data[n] instanceof Array) {
+            for (var k in options.data[n])
+              a.push( { name: n, value: options.data[n][k] } )
+          }  
+          else
+             a.push( { name: n, value: options.data[n] } );
+        }
+    }
+
+    // give pre-submit callback an opportunity to abort the submit
+    if (options.beforeSubmit && options.beforeSubmit(a, this, options) === false) {
+        log('ajaxSubmit: submit aborted via beforeSubmit callback');
+        return this;
+    }    
+
+    // fire vetoable 'validate' event
+    this.trigger('form-submit-validate', [a, this, options, veto]);
+    if (veto.veto) {
+        log('ajaxSubmit: submit vetoed via form-submit-validate trigger');
+        return this;
+    }    
+
+    var q = $.param(a);
+
+    if (options.type.toUpperCase() == 'GET') {
+        options.url += (options.url.indexOf('?') >= 0 ? '&' : '?') + q;
+        options.data = null;  // data is null for 'get'
+    }
+    else
+        options.data = q; // data is the query string for 'post'
+
+    var $form = this, callbacks = [];
+    if (options.resetForm) callbacks.push(function() { $form.resetForm(); });
+    if (options.clearForm) callbacks.push(function() { $form.clearForm(); });
+
+    // perform a load on the target only if dataType is not provided
+    if (!options.dataType && options.target) {
+        var oldSuccess = options.success || function(){};
+        callbacks.push(function(data) {
+            $(options.target).html(data).each(oldSuccess, arguments);
+        });
+    }
+    else if (options.success)
+        callbacks.push(options.success);
+
+    options.success = function(data, status) {
+        for (var i=0, max=callbacks.length; i < max; i++)
+            callbacks[i].apply(options, [data, status, $form]);
+    };
+
+    // are there files to upload?
+    var files = $('input:file', this).fieldValue();
+    var found = false;
+    for (var j=0; j < files.length; j++)
+        if (files[j])
+            found = true;
+
+    // options.iframe allows user to force iframe mode
+   if (options.iframe || found) { 
+       // hack to fix Safari hang (thanks to Tim Molendijk for this)
+       // see:  http://groups.google.com/group/jquery-dev/browse_thread/thread/36395b7ab510dd5d
+       if ($.browser.safari && options.closeKeepAlive)
+           $.get(options.closeKeepAlive, fileUpload);
+       else
+           fileUpload();
+       }
+   else
+       $.ajax(options);
+
+    // fire 'notify' event
+    this.trigger('form-submit-notify', [this, options]);
+    return this;
+
+
+    // private function for handling file uploads (hat tip to YAHOO!)
+    function fileUpload() {
+        var form = $form[0];
+        
+        if ($(':input[name=submit]', form).length) {
+            alert('Error: Form elements must not be named "submit".');
+            return;
+        }
+        
+        var opts = $.extend({}, $.ajaxSettings, options);
+		var s = jQuery.extend(true, {}, $.extend(true, {}, $.ajaxSettings), opts);
+
+        var id = 'jqFormIO' + (new Date().getTime());
+        var $io = $('<iframe id="' + id + '" name="' + id + '" />');
+        var io = $io[0];
+
+        if ($.browser.msie || $.browser.opera) 
+            io.src = 'javascript:false;document.write("");';
+        $io.css({ position: 'absolute', top: '-1000px', left: '-1000px' });
+
+        var xhr = { // mock object
+            aborted: 0,
+            responseText: null,
+            responseXML: null,
+            status: 0,
+            statusText: 'n/a',
+            getAllResponseHeaders: function() {},
+            getResponseHeader: function() {},
+            setRequestHeader: function() {},
+            abort: function() { 
+                this.aborted = 1; 
+                $io.attr('src','about:blank'); // abort op in progress
+            }
+        };
+
+        var g = opts.global;
+        // trigger ajax global events so that activity/block indicators work like normal
+        if (g && ! $.active++) $.event.trigger("ajaxStart");
+        if (g) $.event.trigger("ajaxSend", [xhr, opts]);
+
+		if (s.beforeSend && s.beforeSend(xhr, s) === false) {
+			s.global && jQuery.active--;
+			return;
+        }
+        if (xhr.aborted)
+            return;
+        
+        var cbInvoked = 0;
+        var timedOut = 0;
+
+        // add submitting element to data if we know it
+        var sub = form.clk;
+        if (sub) {
+            var n = sub.name;
+            if (n && !sub.disabled) {
+                options.extraData = options.extraData || {};
+                options.extraData[n] = sub.value;
+                if (sub.type == "image") {
+                    options.extraData[name+'.x'] = form.clk_x;
+                    options.extraData[name+'.y'] = form.clk_y;
+                }
+            }
+        }
+
+        // take a breath so that pending repaints get some cpu time before the upload starts
+        setTimeout(function() {
+            // make sure form attrs are set
+            var t = $form.attr('target'), a = $form.attr('action');
+            $form.attr({
+                target:   id,
+                method:   'POST',
+                action:   opts.url
+            });
+            
+            // ie borks in some cases when setting encoding
+            if (! options.skipEncodingOverride) {
+                $form.attr({
+                    encoding: 'multipart/form-data',
+                    enctype:  'multipart/form-data'
+                });
+            }
+
+            // support timout
+            if (opts.timeout)
+                setTimeout(function() { timedOut = true; cb(); }, opts.timeout);
+
+            // add "extra" data to form if provided in options
+            var extraInputs = [];
+            try {
+                if (options.extraData)
+                    for (var n in options.extraData)
+                        extraInputs.push(
+                            $('<input type="hidden" name="'+n+'" value="'+options.extraData[n]+'" />')
+                                .appendTo(form)[0]);
+            
+                // add iframe to doc and submit the form
+                $io.appendTo('body');
+                io.attachEvent ? io.attachEvent('onload', cb) : io.addEventListener('load', cb, false);
+                form.submit();
+            }
+            finally {
+                // reset attrs and remove "extra" input elements
+                $form.attr('action', a);
+                t ? $form.attr('target', t) : $form.removeAttr('target');
+                $(extraInputs).remove();
+            }
+        }, 10);
+
+        function cb() {
+            if (cbInvoked++) return;
+            
+            io.detachEvent ? io.detachEvent('onload', cb) : io.removeEventListener('load', cb, false);
+
+            var operaHack = 0;
+            var ok = true;
+            try {
+                if (timedOut) throw 'timeout';
+                // extract the server response from the iframe
+                var data, doc;
+
+                doc = io.contentWindow ? io.contentWindow.document : io.contentDocument ? io.contentDocument : io.document;
+                
+                if (doc.body == null && !operaHack && $.browser.opera) {
+                    // In Opera 9.2.x the iframe DOM is not always traversable when
+                    // the onload callback fires so we give Opera 100ms to right itself
+                    operaHack = 1;
+                    cbInvoked--;
+                    setTimeout(cb, 100);
+                    return;
+                }
+                
+                xhr.responseText = doc.body ? doc.body.innerHTML : null;
+                xhr.responseXML = doc.XMLDocument ? doc.XMLDocument : doc;
+                xhr.getResponseHeader = function(header){
+                    var headers = {'content-type': opts.dataType};
+                    return headers[header];
+                };
+
+                if (opts.dataType == 'json' || opts.dataType == 'script') {
+                    var ta = doc.getElementsByTagName('textarea')[0];
+                    xhr.responseText = ta ? ta.value : xhr.responseText;
+                }
+                else if (opts.dataType == 'xml' && !xhr.responseXML && xhr.responseText != null) {
+                    xhr.responseXML = toXml(xhr.responseText);
+                }
+                data = $.httpData(xhr, opts.dataType);
+            }
+            catch(e){
+                ok = false;
+                $.handleError(opts, xhr, 'error', e);
+            }
+
+            // ordering of these callbacks/triggers is odd, but that's how $.ajax does it
+            if (ok) {
+                opts.success(data, 'success');
+                if (g) $.event.trigger("ajaxSuccess", [xhr, opts]);
+            }
+            if (g) $.event.trigger("ajaxComplete", [xhr, opts]);
+            if (g && ! --$.active) $.event.trigger("ajaxStop");
+            if (opts.complete) opts.complete(xhr, ok ? 'success' : 'error');
+
+            // clean up
+            setTimeout(function() {
+                $io.remove();
+                xhr.responseXML = null;
+            }, 100);
+        };
+
+        function toXml(s, doc) {
+            if (window.ActiveXObject) {
+                doc = new ActiveXObject('Microsoft.XMLDOM');
+                doc.async = 'false';
+                doc.loadXML(s);
+            }
+            else
+                doc = (new DOMParser()).parseFromString(s, 'text/xml');
+            return (doc && doc.documentElement && doc.documentElement.tagName != 'parsererror') ? doc : null;
+        };
+    };
+};
+
+/**
+ * ajaxForm() provides a mechanism for fully automating form submission.
+ *
+ * The advantages of using this method instead of ajaxSubmit() are:
+ *
+ * 1: This method will include coordinates for <input type="image" /> elements (if the element
+ *    is used to submit the form).
+ * 2. This method will include the submit element's name/value data (for the element that was
+ *    used to submit the form).
+ * 3. This method binds the submit() method to the form for you.
+ *
+ * The options argument for ajaxForm works exactly as it does for ajaxSubmit.  ajaxForm merely
+ * passes the options argument along after properly binding events for submit elements and
+ * the form itself.
+ */ 
+$.fn.ajaxForm = function(options) {
+    return this.ajaxFormUnbind().bind('submit.form-plugin',function() {
+        $(this).ajaxSubmit(options);
+        return false;
+    }).each(function() {
+        // store options in hash
+        $(":submit,input:image", this).bind('click.form-plugin',function(e) {
+            var form = this.form;
+            form.clk = this;
+            if (this.type == 'image') {
+                if (e.offsetX != undefined) {
+                    form.clk_x = e.offsetX;
+                    form.clk_y = e.offsetY;
+                } else if (typeof $.fn.offset == 'function') { // try to use dimensions plugin
+                    var offset = $(this).offset();
+                    form.clk_x = e.pageX - offset.left;
+                    form.clk_y = e.pageY - offset.top;
+                } else {
+                    form.clk_x = e.pageX - this.offsetLeft;
+                    form.clk_y = e.pageY - this.offsetTop;
+                }
+            }
+            // clear form vars
+            setTimeout(function() { form.clk = form.clk_x = form.clk_y = null; }, 10);
+        });
+    });
+};
+
+// ajaxFormUnbind unbinds the event handlers that were bound by ajaxForm
+$.fn.ajaxFormUnbind = function() {
+    this.unbind('submit.form-plugin');
+    return this.each(function() {
+        $(":submit,input:image", this).unbind('click.form-plugin');
+    });
+
+};
+
+/**
+ * formToArray() gathers form element data into an array of objects that can
+ * be passed to any of the following ajax functions: $.get, $.post, or load.
+ * Each object in the array has both a 'name' and 'value' property.  An example of
+ * an array for a simple login form might be:
+ *
+ * [ { name: 'username', value: 'jresig' }, { name: 'password', value: 'secret' } ]
+ *
+ * It is this array that is passed to pre-submit callback functions provided to the
+ * ajaxSubmit() and ajaxForm() methods.
+ */
+$.fn.formToArray = function(semantic) {
+    var a = [];
+    if (this.length == 0) return a;
+
+    var form = this[0];
+    var els = semantic ? form.getElementsByTagName('*') : form.elements;
+    if (!els) return a;
+    for(var i=0, max=els.length; i < max; i++) {
+        var el = els[i];
+        var n = el.name;
+        if (!n) continue;
+
+        if (semantic && form.clk && el.type == "image") {
+            // handle image inputs on the fly when semantic == true
+            if(!el.disabled && form.clk == el)
+                a.push({name: n+'.x', value: form.clk_x}, {name: n+'.y', value: form.clk_y});
+            continue;
+        }
+
+        var v = $.fieldValue(el, true);
+        if (v && v.constructor == Array) {
+            for(var j=0, jmax=v.length; j < jmax; j++)
+                a.push({name: n, value: v[j]});
+        }
+        else if (v !== null && typeof v != 'undefined')
+            a.push({name: n, value: v});
+    }
+
+    if (!semantic && form.clk) {
+        // input type=='image' are not found in elements array! handle them here
+        var inputs = form.getElementsByTagName("input");
+        for(var i=0, max=inputs.length; i < max; i++) {
+            var input = inputs[i];
+            var n = input.name;
+            if(n && !input.disabled && input.type == "image" && form.clk == input)
+                a.push({name: n+'.x', value: form.clk_x}, {name: n+'.y', value: form.clk_y});
+        }
+    }
+    return a;
+};
+
+/**
+ * Serializes form data into a 'submittable' string. This method will return a string
+ * in the format: name1=value1&amp;name2=value2
+ */
+$.fn.formSerialize = function(semantic) {
+    //hand off to jQuery.param for proper encoding
+    return $.param(this.formToArray(semantic));
+};
+
+/**
+ * Serializes all field elements in the jQuery object into a query string.
+ * This method will return a string in the format: name1=value1&amp;name2=value2
+ */
+$.fn.fieldSerialize = function(successful) {
+    var a = [];
+    this.each(function() {
+        var n = this.name;
+        if (!n) return;
+        var v = $.fieldValue(this, successful);
+        if (v && v.constructor == Array) {
+            for (var i=0,max=v.length; i < max; i++)
+                a.push({name: n, value: v[i]});
+        }
+        else if (v !== null && typeof v != 'undefined')
+            a.push({name: this.name, value: v});
+    });
+    //hand off to jQuery.param for proper encoding
+    return $.param(a);
+};
+
+/**
+ * Returns the value(s) of the element in the matched set.  For example, consider the following form:
+ *
+ *  <form><fieldset>
+ *      <input name="A" type="text" />
+ *      <input name="A" type="text" />
+ *      <input name="B" type="checkbox" value="B1" />
+ *      <input name="B" type="checkbox" value="B2"/>
+ *      <input name="C" type="radio" value="C1" />
+ *      <input name="C" type="radio" value="C2" />
+ *  </fieldset></form>
+ *
+ *  var v = $(':text').fieldValue();
+ *  // if no values are entered into the text inputs
+ *  v == ['','']
+ *  // if values entered into the text inputs are 'foo' and 'bar'
+ *  v == ['foo','bar']
+ *
+ *  var v = $(':checkbox').fieldValue();
+ *  // if neither checkbox is checked
+ *  v === undefined
+ *  // if both checkboxes are checked
+ *  v == ['B1', 'B2']
+ *
+ *  var v = $(':radio').fieldValue();
+ *  // if neither radio is checked
+ *  v === undefined
+ *  // if first radio is checked
+ *  v == ['C1']
+ *
+ * The successful argument controls whether or not the field element must be 'successful'
+ * (per http://www.w3.org/TR/html4/interact/forms.html#successful-controls).
+ * The default value of the successful argument is true.  If this value is false the value(s)
+ * for each element is returned.
+ *
+ * Note: This method *always* returns an array.  If no valid value can be determined the
+ *       array will be empty, otherwise it will contain one or more values.
+ */
+$.fn.fieldValue = function(successful) {
+    for (var val=[], i=0, max=this.length; i < max; i++) {
+        var el = this[i];
+        var v = $.fieldValue(el, successful);
+        if (v === null || typeof v == 'undefined' || (v.constructor == Array && !v.length))
+            continue;
+        v.constructor == Array ? $.merge(val, v) : val.push(v);
+    }
+    return val;
+};
+
+/**
+ * Returns the value of the field element.
+ */
+$.fieldValue = function(el, successful) {
+    var n = el.name, t = el.type, tag = el.tagName.toLowerCase();
+    if (typeof successful == 'undefined') successful = true;
+
+    if (successful && (!n || el.disabled || t == 'reset' || t == 'button' ||
+        (t == 'checkbox' || t == 'radio') && !el.checked ||
+        (t == 'submit' || t == 'image') && el.form && el.form.clk != el ||
+        tag == 'select' && el.selectedIndex == -1))
+            return null;
+
+    if (tag == 'select') {
+        var index = el.selectedIndex;
+        if (index < 0) return null;
+        var a = [], ops = el.options;
+        var one = (t == 'select-one');
+        var max = (one ? index+1 : ops.length);
+        for(var i=(one ? index : 0); i < max; i++) {
+            var op = ops[i];
+            if (op.selected) {
+                // extra pain for IE...
+                var v = $.browser.msie && !(op.attributes['value'].specified) ? op.text : op.value;
+                if (one) return v;
+                a.push(v);
+            }
+        }
+        return a;
+    }
+    return el.value;
+};
+
+/**
+ * Clears the form data.  Takes the following actions on the form's input fields:
+ *  - input text fields will have their 'value' property set to the empty string
+ *  - select elements will have their 'selectedIndex' property set to -1
+ *  - checkbox and radio inputs will have their 'checked' property set to false
+ *  - inputs of type submit, button, reset, and hidden will *not* be effected
+ *  - button elements will *not* be effected
+ */
+$.fn.clearForm = function() {
+    return this.each(function() {
+        $('input,select,textarea', this).clearFields();
+    });
+};
+
+/**
+ * Clears the selected form elements.
+ */
+$.fn.clearFields = $.fn.clearInputs = function() {
+    return this.each(function() {
+        var t = this.type, tag = this.tagName.toLowerCase();
+        if (t == 'file' || t == 'text' || t == 'password' || tag == 'textarea')
+            this.value = '';
+        else if (t == 'checkbox' || t == 'radio')
+            this.checked = false;
+        else if (tag == 'select')
+            this.selectedIndex = -1;
+    });
+};
+
+/**
+ * Resets the form data.  Causes all form elements to be reset to their original value.
+ */
+$.fn.resetForm = function() {
+    return this.each(function() {
+        // guard against an input with the name of 'reset'
+        // note that IE reports the reset function as an 'object'
+        if (typeof this.reset == 'function' || (typeof this.reset == 'object' && !this.reset.nodeType))
+            this.reset();
+    });
+};
+
+/**
+ * Enables or disables any matching elements.
+ */
+$.fn.enable = function(b) { 
+    if (b == undefined) b = true;
+    return this.each(function() { 
+        this.disabled = !b 
+    });
+};
+
+/**
+ * Checks/unchecks any matching checkboxes or radio buttons and
+ * selects/deselects and matching option elements.
+ */
+$.fn.selected = function(select) {
+    if (select == undefined) select = true;
+    return this.each(function() { 
+        var t = this.type;
+        if (t == 'checkbox' || t == 'radio')
+            this.checked = select;
+        else if (this.tagName.toLowerCase() == 'option') {
+            var $sel = $(this).parent('select');
+            if (select && $sel[0] && $sel[0].type == 'select-one') {
+                // deselect all other options
+                $sel.find('option').selected(false);
+            }
+            this.selected = select;
+        }
+    });
+};
+
+// helper fn for console logging
+// set $.fn.ajaxSubmit.debug to true to enable debug logging
+function log() {
+    if ($.fn.ajaxSubmit.debug && window.console && window.console.log)
+        window.console.log('[jquery.form] ' + Array.prototype.join.call(arguments,''));
+};
+
+})(jQuery);

From 93507a192755494417eb0433edd315880752c857 Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Wed, 24 Feb 2010 23:28:01 +0000
Subject: [PATCH 96/97] OStatus: handle update-profile Salmon pings

---
 plugins/OStatus/classes/Ostatus_profile.php |  4 +-
 plugins/OStatus/lib/salmonaction.php        | 55 +++++++++++----------
 2 files changed, 31 insertions(+), 28 deletions(-)

diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index c755a094e6..33b0ceb9ef 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -971,7 +971,7 @@ class Ostatus_profile extends Memcached_DataObject
      * @param Activity $activity
      * @return mixed matching Ostatus_profile or false if none known
      */
-    protected static function getActorProfile($activity)
+    public static function getActorProfile($activity)
     {
         return self::getActivityObjectProfile($activity->actor);
     }
@@ -1109,7 +1109,7 @@ class Ostatus_profile extends Memcached_DataObject
      * @param ActivityObject $object
      * @param array $hints
      */
-    protected function updateFromActivityObject($object, $hints=array())
+    public function updateFromActivityObject($object, $hints=array())
     {
         if ($this->isGroup()) {
             $group = $this->localGroup();
diff --git a/plugins/OStatus/lib/salmonaction.php b/plugins/OStatus/lib/salmonaction.php
index 9aac2ed52f..a03169101b 100644
--- a/plugins/OStatus/lib/salmonaction.php
+++ b/plugins/OStatus/lib/salmonaction.php
@@ -38,11 +38,11 @@ class SalmonAction extends Action
         parent::prepare($args);
 
         if ($_SERVER['REQUEST_METHOD'] != 'POST') {
-            $this->clientError(_('This method requires a POST.'));
+            $this->clientError(_m('This method requires a POST.'));
         }
 
         if (empty($_SERVER['CONTENT_TYPE']) || $_SERVER['CONTENT_TYPE'] != 'application/atom+xml') {
-            $this->clientError(_('Salmon requires application/atom+xml'));
+            $this->clientError(_m('Salmon requires application/atom+xml'));
         }
 
         $xml = file_get_contents('php://input');
@@ -76,8 +76,7 @@ class SalmonAction extends Action
     {
         StatusNet::setApi(true); // Send smaller error pages
 
-        // TODO : Insert new $xml -> notice code
-
+        common_log(LOG_DEBUG, "Got a " . $this->act->verb);
         if (Event::handle('StartHandleSalmon', array($this->activity))) {
             switch ($this->act->verb)
             {
@@ -106,8 +105,11 @@ class SalmonAction extends Action
             case ActivityVerb::LEAVE:
                 $this->handleLeave();
                 break;
+            case ActivityVerb::UPDATE_PROFILE:
+                $this->handleUpdateProfile();
+                break;
             default:
-                throw new ClientException(_("Unimplemented."));
+                throw new ClientException(_m("Unrecognized activity type."));
             }
             Event::handle('EndHandleSalmon', array($this->activity));
         }
@@ -115,56 +117,57 @@ class SalmonAction extends Action
 
     function handlePost()
     {
-        throw new ClientException(_("Unimplemented!"));
+        throw new ClientException(_m("This target doesn't understand posts."));
     }
 
     function handleFollow()
     {
-        throw new ClientException(_("Unimplemented!"));
+        throw new ClientException(_m("This target doesn't understand follows."));
     }
 
     function handleUnfollow()
     {
-        throw new ClientException(_("Unimplemented!"));
+        throw new ClientException(_m("This target doesn't understand unfollows."));
     }
 
     function handleFavorite()
     {
-        throw new ClientException(_("Unimplemented!"));
+        throw new ClientException(_m("This target doesn't understand favorites."));
     }
 
-    /**
-     * Remote user doesn't like one of our posts after all!
-     * Confirm the post is ours, and delete a local favorite event.
-     */
-
     function handleUnfavorite()
     {
-        throw new ClientException(_("Unimplemented!"));
+        throw new ClientException(_m("This target doesn't understand unfavorites."));
     }
 
-    /**
-     * Hmmmm
-     */
     function handleShare()
     {
-        throw new ClientException(_("Unimplemented!"));
+        throw new ClientException(_m("This target doesn't understand share events."));
     }
 
-    /**
-     * Hmmmm
-     */
     function handleJoin()
     {
-        throw new ClientException(_("Unimplemented!"));
+        throw new ClientException(_m("This target doesn't understand joins."));
+    }
+
+    function handleLeave()
+    {
+        throw new ClientException(_m("This target doesn't understand leave events."));
     }
 
     /**
-     * Hmmmm
+     * Remote user sent us an update to their profile.
+     * If we already know them, accept the updates.
      */
-    function handleLeave()
+    function handleUpdateProfile()
     {
-        throw new ClientException(_("Unimplemented!"));
+        $oprofile = Ostatus_profile::getActorProfile($this->act);
+        if ($oprofile) {
+            common_log(LOG_INFO, "Got a profile-update ping from $oprofile->uri");
+            $oprofile->updateFromActivityObject($this->act->actor);
+        } else {
+            common_log(LOG_INFO, "Ignoring profile-update ping from unknown " . $this->act->actor->id);
+        }
     }
 
     /**

From e18e659ca3b40ade283f51c91a263507d7c6694e Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Wed, 24 Feb 2010 23:39:40 +0000
Subject: [PATCH 97/97] Drop HTMLPurifier; we don't need its extra capabilities
 and we're already using htmLawed which is lighter-weight.

---
 extlib/HTMLPurifier/HTMLPurifier.auto.php     |   11 -
 extlib/HTMLPurifier/HTMLPurifier.autoload.php |   21 -
 extlib/HTMLPurifier/HTMLPurifier.func.php     |   23 -
 extlib/HTMLPurifier/HTMLPurifier.includes.php |  208 -
 extlib/HTMLPurifier/HTMLPurifier.kses.php     |   30 -
 extlib/HTMLPurifier/HTMLPurifier.path.php     |   11 -
 extlib/HTMLPurifier/HTMLPurifier.php          |  237 -
 .../HTMLPurifier.safe-includes.php            |  202 -
 .../HTMLPurifier/AttrCollections.php          |  128 -
 extlib/HTMLPurifier/HTMLPurifier/AttrDef.php  |   87 -
 .../HTMLPurifier/HTMLPurifier/AttrDef/CSS.php |   87 -
 .../HTMLPurifier/AttrDef/CSS/AlphaValue.php   |   21 -
 .../HTMLPurifier/AttrDef/CSS/Background.php   |   87 -
 .../AttrDef/CSS/BackgroundPosition.php        |  126 -
 .../HTMLPurifier/AttrDef/CSS/Border.php       |   43 -
 .../HTMLPurifier/AttrDef/CSS/Color.php        |   78 -
 .../HTMLPurifier/AttrDef/CSS/Composite.php    |   38 -
 .../AttrDef/CSS/DenyElementDecorator.php      |   28 -
 .../HTMLPurifier/AttrDef/CSS/Filter.php       |   54 -
 .../HTMLPurifier/AttrDef/CSS/Font.php         |  149 -
 .../HTMLPurifier/AttrDef/CSS/FontFamily.php   |   90 -
 .../AttrDef/CSS/ImportantDecorator.php        |   40 -
 .../HTMLPurifier/AttrDef/CSS/Length.php       |   47 -
 .../HTMLPurifier/AttrDef/CSS/ListStyle.php    |   78 -
 .../HTMLPurifier/AttrDef/CSS/Multiple.php     |   58 -
 .../HTMLPurifier/AttrDef/CSS/Number.php       |   69 -
 .../HTMLPurifier/AttrDef/CSS/Percentage.php   |   40 -
 .../AttrDef/CSS/TextDecoration.php            |   38 -
 .../HTMLPurifier/AttrDef/CSS/URI.php          |   56 -
 .../HTMLPurifier/AttrDef/Enum.php             |   65 -
 .../HTMLPurifier/AttrDef/HTML/Bool.php        |   28 -
 .../HTMLPurifier/AttrDef/HTML/Class.php       |   34 -
 .../HTMLPurifier/AttrDef/HTML/Color.php       |   32 -
 .../HTMLPurifier/AttrDef/HTML/FrameTarget.php |   21 -
 .../HTMLPurifier/AttrDef/HTML/ID.php          |   70 -
 .../HTMLPurifier/AttrDef/HTML/Length.php      |   41 -
 .../HTMLPurifier/AttrDef/HTML/LinkTypes.php   |   53 -
 .../HTMLPurifier/AttrDef/HTML/MultiLength.php |   41 -
 .../HTMLPurifier/AttrDef/HTML/Nmtokens.php    |   52 -
 .../HTMLPurifier/AttrDef/HTML/Pixels.php      |   48 -
 .../HTMLPurifier/AttrDef/Integer.php          |   73 -
 .../HTMLPurifier/AttrDef/Lang.php             |   73 -
 .../HTMLPurifier/AttrDef/Switch.php           |   34 -
 .../HTMLPurifier/AttrDef/Text.php             |   15 -
 .../HTMLPurifier/HTMLPurifier/AttrDef/URI.php |   77 -
 .../HTMLPurifier/AttrDef/URI/Email.php        |   17 -
 .../AttrDef/URI/Email/SimpleCheck.php         |   21 -
 .../HTMLPurifier/AttrDef/URI/Host.php         |   62 -
 .../HTMLPurifier/AttrDef/URI/IPv4.php         |   39 -
 .../HTMLPurifier/AttrDef/URI/IPv6.php         |   99 -
 .../HTMLPurifier/AttrTransform.php            |   56 -
 .../HTMLPurifier/AttrTransform/Background.php |   23 -
 .../HTMLPurifier/AttrTransform/BdoDir.php     |   19 -
 .../HTMLPurifier/AttrTransform/BgColor.php    |   23 -
 .../HTMLPurifier/AttrTransform/BoolToCSS.php  |   36 -
 .../HTMLPurifier/AttrTransform/Border.php     |   18 -
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diff --git a/extlib/HTMLPurifier/HTMLPurifier.auto.php b/extlib/HTMLPurifier/HTMLPurifier.auto.php
deleted file mode 100644
index 1960c399f8..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier.auto.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-/**
- * This is a stub include that automatically configures the include path.
- */
-
-set_include_path(dirname(__FILE__) . PATH_SEPARATOR . get_include_path() );
-require_once 'HTMLPurifier/Bootstrap.php';
-require_once 'HTMLPurifier.autoload.php';
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier.autoload.php b/extlib/HTMLPurifier/HTMLPurifier.autoload.php
deleted file mode 100644
index 8d40176406..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier.autoload.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-/**
- * @file
- * Convenience file that registers autoload handler for HTML Purifier.
- */
-
-if (function_exists('spl_autoload_register') && function_exists('spl_autoload_unregister')) {
-    // We need unregister for our pre-registering functionality
-    HTMLPurifier_Bootstrap::registerAutoload();
-    if (function_exists('__autoload')) {
-        // Be polite and ensure that userland autoload gets retained
-        spl_autoload_register('__autoload');
-    }
-} elseif (!function_exists('__autoload')) {
-    function __autoload($class) {
-        return HTMLPurifier_Bootstrap::autoload($class);
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier.func.php b/extlib/HTMLPurifier/HTMLPurifier.func.php
deleted file mode 100644
index 56a55b2fed..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier.func.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-/**
- * @file
- * Defines a function wrapper for HTML Purifier for quick use.
- * @note ''HTMLPurifier()'' is NOT the same as ''new HTMLPurifier()''
- */
-
-/**
- * Purify HTML.
- * @param $html String HTML to purify
- * @param $config Configuration to use, can be any value accepted by
- *        HTMLPurifier_Config::create()
- */
-function HTMLPurifier($html, $config = null) {
-    static $purifier = false;
-    if (!$purifier) {
-        $purifier = new HTMLPurifier();
-    }
-    return $purifier->purify($html, $config);
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier.includes.php b/extlib/HTMLPurifier/HTMLPurifier.includes.php
deleted file mode 100644
index 7cfb970601..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier.includes.php
+++ /dev/null
@@ -1,208 +0,0 @@
-<?php
-
-/**
- * @file
- * This file was auto-generated by generate-includes.php and includes all of
- * the core files required by HTML Purifier. Use this if performance is a
- * primary concern and you are using an opcode cache. PLEASE DO NOT EDIT THIS
- * FILE, changes will be overwritten the next time the script is run.
- *
- * @version 4.0.0
- *
- * @warning
- *      You must *not* include any other HTML Purifier files before this file,
- *      because 'require' not 'require_once' is used.
- *
- * @warning
- *      This file requires that the include path contains the HTML Purifier
- *      library directory; this is not auto-set.
- */
-
-require 'HTMLPurifier.php';
-require 'HTMLPurifier/AttrCollections.php';
-require 'HTMLPurifier/AttrDef.php';
-require 'HTMLPurifier/AttrTransform.php';
-require 'HTMLPurifier/AttrTypes.php';
-require 'HTMLPurifier/AttrValidator.php';
-require 'HTMLPurifier/Bootstrap.php';
-require 'HTMLPurifier/Definition.php';
-require 'HTMLPurifier/CSSDefinition.php';
-require 'HTMLPurifier/ChildDef.php';
-require 'HTMLPurifier/Config.php';
-require 'HTMLPurifier/ConfigSchema.php';
-require 'HTMLPurifier/ContentSets.php';
-require 'HTMLPurifier/Context.php';
-require 'HTMLPurifier/DefinitionCache.php';
-require 'HTMLPurifier/DefinitionCacheFactory.php';
-require 'HTMLPurifier/Doctype.php';
-require 'HTMLPurifier/DoctypeRegistry.php';
-require 'HTMLPurifier/ElementDef.php';
-require 'HTMLPurifier/Encoder.php';
-require 'HTMLPurifier/EntityLookup.php';
-require 'HTMLPurifier/EntityParser.php';
-require 'HTMLPurifier/ErrorCollector.php';
-require 'HTMLPurifier/ErrorStruct.php';
-require 'HTMLPurifier/Exception.php';
-require 'HTMLPurifier/Filter.php';
-require 'HTMLPurifier/Generator.php';
-require 'HTMLPurifier/HTMLDefinition.php';
-require 'HTMLPurifier/HTMLModule.php';
-require 'HTMLPurifier/HTMLModuleManager.php';
-require 'HTMLPurifier/IDAccumulator.php';
-require 'HTMLPurifier/Injector.php';
-require 'HTMLPurifier/Language.php';
-require 'HTMLPurifier/LanguageFactory.php';
-require 'HTMLPurifier/Length.php';
-require 'HTMLPurifier/Lexer.php';
-require 'HTMLPurifier/PercentEncoder.php';
-require 'HTMLPurifier/PropertyList.php';
-require 'HTMLPurifier/PropertyListIterator.php';
-require 'HTMLPurifier/Strategy.php';
-require 'HTMLPurifier/StringHash.php';
-require 'HTMLPurifier/StringHashParser.php';
-require 'HTMLPurifier/TagTransform.php';
-require 'HTMLPurifier/Token.php';
-require 'HTMLPurifier/TokenFactory.php';
-require 'HTMLPurifier/URI.php';
-require 'HTMLPurifier/URIDefinition.php';
-require 'HTMLPurifier/URIFilter.php';
-require 'HTMLPurifier/URIParser.php';
-require 'HTMLPurifier/URIScheme.php';
-require 'HTMLPurifier/URISchemeRegistry.php';
-require 'HTMLPurifier/UnitConverter.php';
-require 'HTMLPurifier/VarParser.php';
-require 'HTMLPurifier/VarParserException.php';
-require 'HTMLPurifier/AttrDef/CSS.php';
-require 'HTMLPurifier/AttrDef/Enum.php';
-require 'HTMLPurifier/AttrDef/Integer.php';
-require 'HTMLPurifier/AttrDef/Lang.php';
-require 'HTMLPurifier/AttrDef/Switch.php';
-require 'HTMLPurifier/AttrDef/Text.php';
-require 'HTMLPurifier/AttrDef/URI.php';
-require 'HTMLPurifier/AttrDef/CSS/Number.php';
-require 'HTMLPurifier/AttrDef/CSS/AlphaValue.php';
-require 'HTMLPurifier/AttrDef/CSS/Background.php';
-require 'HTMLPurifier/AttrDef/CSS/BackgroundPosition.php';
-require 'HTMLPurifier/AttrDef/CSS/Border.php';
-require 'HTMLPurifier/AttrDef/CSS/Color.php';
-require 'HTMLPurifier/AttrDef/CSS/Composite.php';
-require 'HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php';
-require 'HTMLPurifier/AttrDef/CSS/Filter.php';
-require 'HTMLPurifier/AttrDef/CSS/Font.php';
-require 'HTMLPurifier/AttrDef/CSS/FontFamily.php';
-require 'HTMLPurifier/AttrDef/CSS/ImportantDecorator.php';
-require 'HTMLPurifier/AttrDef/CSS/Length.php';
-require 'HTMLPurifier/AttrDef/CSS/ListStyle.php';
-require 'HTMLPurifier/AttrDef/CSS/Multiple.php';
-require 'HTMLPurifier/AttrDef/CSS/Percentage.php';
-require 'HTMLPurifier/AttrDef/CSS/TextDecoration.php';
-require 'HTMLPurifier/AttrDef/CSS/URI.php';
-require 'HTMLPurifier/AttrDef/HTML/Bool.php';
-require 'HTMLPurifier/AttrDef/HTML/Nmtokens.php';
-require 'HTMLPurifier/AttrDef/HTML/Class.php';
-require 'HTMLPurifier/AttrDef/HTML/Color.php';
-require 'HTMLPurifier/AttrDef/HTML/FrameTarget.php';
-require 'HTMLPurifier/AttrDef/HTML/ID.php';
-require 'HTMLPurifier/AttrDef/HTML/Pixels.php';
-require 'HTMLPurifier/AttrDef/HTML/Length.php';
-require 'HTMLPurifier/AttrDef/HTML/LinkTypes.php';
-require 'HTMLPurifier/AttrDef/HTML/MultiLength.php';
-require 'HTMLPurifier/AttrDef/URI/Email.php';
-require 'HTMLPurifier/AttrDef/URI/Host.php';
-require 'HTMLPurifier/AttrDef/URI/IPv4.php';
-require 'HTMLPurifier/AttrDef/URI/IPv6.php';
-require 'HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php';
-require 'HTMLPurifier/AttrTransform/Background.php';
-require 'HTMLPurifier/AttrTransform/BdoDir.php';
-require 'HTMLPurifier/AttrTransform/BgColor.php';
-require 'HTMLPurifier/AttrTransform/BoolToCSS.php';
-require 'HTMLPurifier/AttrTransform/Border.php';
-require 'HTMLPurifier/AttrTransform/EnumToCSS.php';
-require 'HTMLPurifier/AttrTransform/ImgRequired.php';
-require 'HTMLPurifier/AttrTransform/ImgSpace.php';
-require 'HTMLPurifier/AttrTransform/Input.php';
-require 'HTMLPurifier/AttrTransform/Lang.php';
-require 'HTMLPurifier/AttrTransform/Length.php';
-require 'HTMLPurifier/AttrTransform/Name.php';
-require 'HTMLPurifier/AttrTransform/NameSync.php';
-require 'HTMLPurifier/AttrTransform/SafeEmbed.php';
-require 'HTMLPurifier/AttrTransform/SafeObject.php';
-require 'HTMLPurifier/AttrTransform/SafeParam.php';
-require 'HTMLPurifier/AttrTransform/ScriptRequired.php';
-require 'HTMLPurifier/AttrTransform/Textarea.php';
-require 'HTMLPurifier/ChildDef/Chameleon.php';
-require 'HTMLPurifier/ChildDef/Custom.php';
-require 'HTMLPurifier/ChildDef/Empty.php';
-require 'HTMLPurifier/ChildDef/Required.php';
-require 'HTMLPurifier/ChildDef/Optional.php';
-require 'HTMLPurifier/ChildDef/StrictBlockquote.php';
-require 'HTMLPurifier/ChildDef/Table.php';
-require 'HTMLPurifier/DefinitionCache/Decorator.php';
-require 'HTMLPurifier/DefinitionCache/Null.php';
-require 'HTMLPurifier/DefinitionCache/Serializer.php';
-require 'HTMLPurifier/DefinitionCache/Decorator/Cleanup.php';
-require 'HTMLPurifier/DefinitionCache/Decorator/Memory.php';
-require 'HTMLPurifier/HTMLModule/Bdo.php';
-require 'HTMLPurifier/HTMLModule/CommonAttributes.php';
-require 'HTMLPurifier/HTMLModule/Edit.php';
-require 'HTMLPurifier/HTMLModule/Forms.php';
-require 'HTMLPurifier/HTMLModule/Hypertext.php';
-require 'HTMLPurifier/HTMLModule/Image.php';
-require 'HTMLPurifier/HTMLModule/Legacy.php';
-require 'HTMLPurifier/HTMLModule/List.php';
-require 'HTMLPurifier/HTMLModule/Name.php';
-require 'HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php';
-require 'HTMLPurifier/HTMLModule/Object.php';
-require 'HTMLPurifier/HTMLModule/Presentation.php';
-require 'HTMLPurifier/HTMLModule/Proprietary.php';
-require 'HTMLPurifier/HTMLModule/Ruby.php';
-require 'HTMLPurifier/HTMLModule/SafeEmbed.php';
-require 'HTMLPurifier/HTMLModule/SafeObject.php';
-require 'HTMLPurifier/HTMLModule/Scripting.php';
-require 'HTMLPurifier/HTMLModule/StyleAttribute.php';
-require 'HTMLPurifier/HTMLModule/Tables.php';
-require 'HTMLPurifier/HTMLModule/Target.php';
-require 'HTMLPurifier/HTMLModule/Text.php';
-require 'HTMLPurifier/HTMLModule/Tidy.php';
-require 'HTMLPurifier/HTMLModule/XMLCommonAttributes.php';
-require 'HTMLPurifier/HTMLModule/Tidy/Name.php';
-require 'HTMLPurifier/HTMLModule/Tidy/Proprietary.php';
-require 'HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php';
-require 'HTMLPurifier/HTMLModule/Tidy/Strict.php';
-require 'HTMLPurifier/HTMLModule/Tidy/Transitional.php';
-require 'HTMLPurifier/HTMLModule/Tidy/XHTML.php';
-require 'HTMLPurifier/Injector/AutoParagraph.php';
-require 'HTMLPurifier/Injector/DisplayLinkURI.php';
-require 'HTMLPurifier/Injector/Linkify.php';
-require 'HTMLPurifier/Injector/PurifierLinkify.php';
-require 'HTMLPurifier/Injector/RemoveEmpty.php';
-require 'HTMLPurifier/Injector/SafeObject.php';
-require 'HTMLPurifier/Lexer/DOMLex.php';
-require 'HTMLPurifier/Lexer/DirectLex.php';
-require 'HTMLPurifier/Strategy/Composite.php';
-require 'HTMLPurifier/Strategy/Core.php';
-require 'HTMLPurifier/Strategy/FixNesting.php';
-require 'HTMLPurifier/Strategy/MakeWellFormed.php';
-require 'HTMLPurifier/Strategy/RemoveForeignElements.php';
-require 'HTMLPurifier/Strategy/ValidateAttributes.php';
-require 'HTMLPurifier/TagTransform/Font.php';
-require 'HTMLPurifier/TagTransform/Simple.php';
-require 'HTMLPurifier/Token/Comment.php';
-require 'HTMLPurifier/Token/Tag.php';
-require 'HTMLPurifier/Token/Empty.php';
-require 'HTMLPurifier/Token/End.php';
-require 'HTMLPurifier/Token/Start.php';
-require 'HTMLPurifier/Token/Text.php';
-require 'HTMLPurifier/URIFilter/DisableExternal.php';
-require 'HTMLPurifier/URIFilter/DisableExternalResources.php';
-require 'HTMLPurifier/URIFilter/HostBlacklist.php';
-require 'HTMLPurifier/URIFilter/MakeAbsolute.php';
-require 'HTMLPurifier/URIFilter/Munge.php';
-require 'HTMLPurifier/URIScheme/ftp.php';
-require 'HTMLPurifier/URIScheme/http.php';
-require 'HTMLPurifier/URIScheme/https.php';
-require 'HTMLPurifier/URIScheme/mailto.php';
-require 'HTMLPurifier/URIScheme/news.php';
-require 'HTMLPurifier/URIScheme/nntp.php';
-require 'HTMLPurifier/VarParser/Flexible.php';
-require 'HTMLPurifier/VarParser/Native.php';
diff --git a/extlib/HTMLPurifier/HTMLPurifier.kses.php b/extlib/HTMLPurifier/HTMLPurifier.kses.php
deleted file mode 100644
index 3143feb17f..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier.kses.php
+++ /dev/null
@@ -1,30 +0,0 @@
-<?php
-
-/**
- * @file
- * Emulation layer for code that used kses(), substituting in HTML Purifier.
- */
-
-require_once dirname(__FILE__) . '/HTMLPurifier.auto.php';
-
-function kses($string, $allowed_html, $allowed_protocols = null) {
-    $config = HTMLPurifier_Config::createDefault();
-    $allowed_elements = array();
-    $allowed_attributes = array();
-    foreach ($allowed_html as $element => $attributes) {
-        $allowed_elements[$element] = true;
-        foreach ($attributes as $attribute => $x) {
-            $allowed_attributes["$element.$attribute"] = true;
-        }
-    }
-    $config->set('HTML.AllowedElements', $allowed_elements);
-    $config->set('HTML.AllowedAttributes', $allowed_attributes);
-    $allowed_schemes = array();
-    if ($allowed_protocols !== null) {
-        $config->set('URI.AllowedSchemes', $allowed_protocols);
-    }
-    $purifier = new HTMLPurifier($config);
-    return $purifier->purify($string);
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier.path.php b/extlib/HTMLPurifier/HTMLPurifier.path.php
deleted file mode 100644
index 39b1b65319..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier.path.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-/**
- * @file
- * Convenience stub file that adds HTML Purifier's library file to the path
- * without any other side-effects.
- */
-
-set_include_path(dirname(__FILE__) . PATH_SEPARATOR . get_include_path() );
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier.php b/extlib/HTMLPurifier/HTMLPurifier.php
deleted file mode 100644
index e3fce9c2a3..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier.php
+++ /dev/null
@@ -1,237 +0,0 @@
-<?php
-
-/*! @mainpage
- *
- * HTML Purifier is an HTML filter that will take an arbitrary snippet of
- * HTML and rigorously test, validate and filter it into a version that
- * is safe for output onto webpages. It achieves this by:
- *
- *  -# Lexing (parsing into tokens) the document,
- *  -# Executing various strategies on the tokens:
- *      -# Removing all elements not in the whitelist,
- *      -# Making the tokens well-formed,
- *      -# Fixing the nesting of the nodes, and
- *      -# Validating attributes of the nodes; and
- *  -# Generating HTML from the purified tokens.
- *
- * However, most users will only need to interface with the HTMLPurifier
- * and HTMLPurifier_Config.
- */
-
-/*
-    HTML Purifier 4.0.0 - Standards Compliant HTML Filtering
-    Copyright (C) 2006-2008 Edward Z. Yang
-
-    This library is free software; you can redistribute it and/or
-    modify it under the terms of the GNU Lesser General Public
-    License as published by the Free Software Foundation; either
-    version 2.1 of the License, or (at your option) any later version.
-
-    This library is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-    Lesser General Public License for more details.
-
-    You should have received a copy of the GNU Lesser General Public
-    License along with this library; if not, write to the Free Software
-    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-/**
- * Facade that coordinates HTML Purifier's subsystems in order to purify HTML.
- *
- * @note There are several points in which configuration can be specified
- *       for HTML Purifier.  The precedence of these (from lowest to
- *       highest) is as follows:
- *          -# Instance: new HTMLPurifier($config)
- *          -# Invocation: purify($html, $config)
- *       These configurations are entirely independent of each other and
- *       are *not* merged (this behavior may change in the future).
- *
- * @todo We need an easier way to inject strategies using the configuration
- *       object.
- */
-class HTMLPurifier
-{
-
-    /** Version of HTML Purifier */
-    public $version = '4.0.0';
-
-    /** Constant with version of HTML Purifier */
-    const VERSION = '4.0.0';
-
-    /** Global configuration object */
-    public $config;
-
-    /** Array of extra HTMLPurifier_Filter objects to run on HTML, for backwards compatibility */
-    private $filters = array();
-
-    /** Single instance of HTML Purifier */
-    private static $instance;
-
-    protected $strategy, $generator;
-
-    /**
-     * Resultant HTMLPurifier_Context of last run purification. Is an array
-     * of contexts if the last called method was purifyArray().
-     */
-    public $context;
-
-    /**
-     * Initializes the purifier.
-     * @param $config Optional HTMLPurifier_Config object for all instances of
-     *                the purifier, if omitted, a default configuration is
-     *                supplied (which can be overridden on a per-use basis).
-     *                The parameter can also be any type that
-     *                HTMLPurifier_Config::create() supports.
-     */
-    public function __construct($config = null) {
-
-        $this->config = HTMLPurifier_Config::create($config);
-
-        $this->strategy     = new HTMLPurifier_Strategy_Core();
-
-    }
-
-    /**
-     * Adds a filter to process the output. First come first serve
-     * @param $filter HTMLPurifier_Filter object
-     */
-    public function addFilter($filter) {
-        trigger_error('HTMLPurifier->addFilter() is deprecated, use configuration directives in the Filter namespace or Filter.Custom', E_USER_WARNING);
-        $this->filters[] = $filter;
-    }
-
-    /**
-     * Filters an HTML snippet/document to be XSS-free and standards-compliant.
-     *
-     * @param $html String of HTML to purify
-     * @param $config HTMLPurifier_Config object for this operation, if omitted,
-     *                defaults to the config object specified during this
-     *                object's construction. The parameter can also be any type
-     *                that HTMLPurifier_Config::create() supports.
-     * @return Purified HTML
-     */
-    public function purify($html, $config = null) {
-
-        // :TODO: make the config merge in, instead of replace
-        $config = $config ? HTMLPurifier_Config::create($config) : $this->config;
-
-        // implementation is partially environment dependant, partially
-        // configuration dependant
-        $lexer = HTMLPurifier_Lexer::create($config);
-
-        $context = new HTMLPurifier_Context();
-
-        // setup HTML generator
-        $this->generator = new HTMLPurifier_Generator($config, $context);
-        $context->register('Generator', $this->generator);
-
-        // set up global context variables
-        if ($config->get('Core.CollectErrors')) {
-            // may get moved out if other facilities use it
-            $language_factory = HTMLPurifier_LanguageFactory::instance();
-            $language = $language_factory->create($config, $context);
-            $context->register('Locale', $language);
-
-            $error_collector = new HTMLPurifier_ErrorCollector($context);
-            $context->register('ErrorCollector', $error_collector);
-        }
-
-        // setup id_accumulator context, necessary due to the fact that
-        // AttrValidator can be called from many places
-        $id_accumulator = HTMLPurifier_IDAccumulator::build($config, $context);
-        $context->register('IDAccumulator', $id_accumulator);
-
-        $html = HTMLPurifier_Encoder::convertToUTF8($html, $config, $context);
-
-        // setup filters
-        $filter_flags = $config->getBatch('Filter');
-        $custom_filters = $filter_flags['Custom'];
-        unset($filter_flags['Custom']);
-        $filters = array();
-        foreach ($filter_flags as $filter => $flag) {
-            if (!$flag) continue;
-            if (strpos($filter, '.') !== false) continue;
-            $class = "HTMLPurifier_Filter_$filter";
-            $filters[] = new $class;
-        }
-        foreach ($custom_filters as $filter) {
-            // maybe "HTMLPurifier_Filter_$filter", but be consistent with AutoFormat
-            $filters[] = $filter;
-        }
-        $filters = array_merge($filters, $this->filters);
-        // maybe prepare(), but later
-
-        for ($i = 0, $filter_size = count($filters); $i < $filter_size; $i++) {
-            $html = $filters[$i]->preFilter($html, $config, $context);
-        }
-
-        // purified HTML
-        $html =
-            $this->generator->generateFromTokens(
-                // list of tokens
-                $this->strategy->execute(
-                    // list of un-purified tokens
-                    $lexer->tokenizeHTML(
-                        // un-purified HTML
-                        $html, $config, $context
-                    ),
-                    $config, $context
-                )
-            );
-
-        for ($i = $filter_size - 1; $i >= 0; $i--) {
-            $html = $filters[$i]->postFilter($html, $config, $context);
-        }
-
-        $html = HTMLPurifier_Encoder::convertFromUTF8($html, $config, $context);
-        $this->context =& $context;
-        return $html;
-    }
-
-    /**
-     * Filters an array of HTML snippets
-     * @param $config Optional HTMLPurifier_Config object for this operation.
-     *                See HTMLPurifier::purify() for more details.
-     * @return Array of purified HTML
-     */
-    public function purifyArray($array_of_html, $config = null) {
-        $context_array = array();
-        foreach ($array_of_html as $key => $html) {
-            $array_of_html[$key] = $this->purify($html, $config);
-            $context_array[$key] = $this->context;
-        }
-        $this->context = $context_array;
-        return $array_of_html;
-    }
-
-    /**
-     * Singleton for enforcing just one HTML Purifier in your system
-     * @param $prototype Optional prototype HTMLPurifier instance to
-     *                   overload singleton with, or HTMLPurifier_Config
-     *                   instance to configure the generated version with.
-     */
-    public static function instance($prototype = null) {
-        if (!self::$instance || $prototype) {
-            if ($prototype instanceof HTMLPurifier) {
-                self::$instance = $prototype;
-            } elseif ($prototype) {
-                self::$instance = new HTMLPurifier($prototype);
-            } else {
-                self::$instance = new HTMLPurifier();
-            }
-        }
-        return self::$instance;
-    }
-
-    /**
-     * @note Backwards compatibility, see instance()
-     */
-    public static function getInstance($prototype = null) {
-        return HTMLPurifier::instance($prototype);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier.safe-includes.php b/extlib/HTMLPurifier/HTMLPurifier.safe-includes.php
deleted file mode 100644
index cf2c1d617a..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier.safe-includes.php
+++ /dev/null
@@ -1,202 +0,0 @@
-<?php
-
-/**
- * @file
- * This file was auto-generated by generate-includes.php and includes all of
- * the core files required by HTML Purifier. This is a convenience stub that
- * includes all files using dirname(__FILE__) and require_once. PLEASE DO NOT
- * EDIT THIS FILE, changes will be overwritten the next time the script is run.
- *
- * Changes to include_path are not necessary.
- */
-
-$__dir = dirname(__FILE__);
-
-require_once $__dir . '/HTMLPurifier.php';
-require_once $__dir . '/HTMLPurifier/AttrCollections.php';
-require_once $__dir . '/HTMLPurifier/AttrDef.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform.php';
-require_once $__dir . '/HTMLPurifier/AttrTypes.php';
-require_once $__dir . '/HTMLPurifier/AttrValidator.php';
-require_once $__dir . '/HTMLPurifier/Bootstrap.php';
-require_once $__dir . '/HTMLPurifier/Definition.php';
-require_once $__dir . '/HTMLPurifier/CSSDefinition.php';
-require_once $__dir . '/HTMLPurifier/ChildDef.php';
-require_once $__dir . '/HTMLPurifier/Config.php';
-require_once $__dir . '/HTMLPurifier/ConfigSchema.php';
-require_once $__dir . '/HTMLPurifier/ContentSets.php';
-require_once $__dir . '/HTMLPurifier/Context.php';
-require_once $__dir . '/HTMLPurifier/DefinitionCache.php';
-require_once $__dir . '/HTMLPurifier/DefinitionCacheFactory.php';
-require_once $__dir . '/HTMLPurifier/Doctype.php';
-require_once $__dir . '/HTMLPurifier/DoctypeRegistry.php';
-require_once $__dir . '/HTMLPurifier/ElementDef.php';
-require_once $__dir . '/HTMLPurifier/Encoder.php';
-require_once $__dir . '/HTMLPurifier/EntityLookup.php';
-require_once $__dir . '/HTMLPurifier/EntityParser.php';
-require_once $__dir . '/HTMLPurifier/ErrorCollector.php';
-require_once $__dir . '/HTMLPurifier/ErrorStruct.php';
-require_once $__dir . '/HTMLPurifier/Exception.php';
-require_once $__dir . '/HTMLPurifier/Filter.php';
-require_once $__dir . '/HTMLPurifier/Generator.php';
-require_once $__dir . '/HTMLPurifier/HTMLDefinition.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule.php';
-require_once $__dir . '/HTMLPurifier/HTMLModuleManager.php';
-require_once $__dir . '/HTMLPurifier/IDAccumulator.php';
-require_once $__dir . '/HTMLPurifier/Injector.php';
-require_once $__dir . '/HTMLPurifier/Language.php';
-require_once $__dir . '/HTMLPurifier/LanguageFactory.php';
-require_once $__dir . '/HTMLPurifier/Length.php';
-require_once $__dir . '/HTMLPurifier/Lexer.php';
-require_once $__dir . '/HTMLPurifier/PercentEncoder.php';
-require_once $__dir . '/HTMLPurifier/PropertyList.php';
-require_once $__dir . '/HTMLPurifier/PropertyListIterator.php';
-require_once $__dir . '/HTMLPurifier/Strategy.php';
-require_once $__dir . '/HTMLPurifier/StringHash.php';
-require_once $__dir . '/HTMLPurifier/StringHashParser.php';
-require_once $__dir . '/HTMLPurifier/TagTransform.php';
-require_once $__dir . '/HTMLPurifier/Token.php';
-require_once $__dir . '/HTMLPurifier/TokenFactory.php';
-require_once $__dir . '/HTMLPurifier/URI.php';
-require_once $__dir . '/HTMLPurifier/URIDefinition.php';
-require_once $__dir . '/HTMLPurifier/URIFilter.php';
-require_once $__dir . '/HTMLPurifier/URIParser.php';
-require_once $__dir . '/HTMLPurifier/URIScheme.php';
-require_once $__dir . '/HTMLPurifier/URISchemeRegistry.php';
-require_once $__dir . '/HTMLPurifier/UnitConverter.php';
-require_once $__dir . '/HTMLPurifier/VarParser.php';
-require_once $__dir . '/HTMLPurifier/VarParserException.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/Enum.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/Integer.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/Lang.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/Switch.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/Text.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/URI.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Number.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/AlphaValue.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Background.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/BackgroundPosition.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Border.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Color.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Composite.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Filter.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Font.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/FontFamily.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/ImportantDecorator.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Length.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/ListStyle.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Multiple.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Percentage.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/TextDecoration.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/CSS/URI.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/HTML/Bool.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/HTML/Nmtokens.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/HTML/Class.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/HTML/Color.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/HTML/FrameTarget.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/HTML/ID.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/HTML/Pixels.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/HTML/Length.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/HTML/LinkTypes.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/HTML/MultiLength.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/URI/Email.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/URI/Host.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/URI/IPv4.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/URI/IPv6.php';
-require_once $__dir . '/HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/Background.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/BdoDir.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/BgColor.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/BoolToCSS.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/Border.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/EnumToCSS.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/ImgRequired.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/ImgSpace.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/Input.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/Lang.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/Length.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/Name.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/NameSync.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/SafeEmbed.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/SafeObject.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/SafeParam.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/ScriptRequired.php';
-require_once $__dir . '/HTMLPurifier/AttrTransform/Textarea.php';
-require_once $__dir . '/HTMLPurifier/ChildDef/Chameleon.php';
-require_once $__dir . '/HTMLPurifier/ChildDef/Custom.php';
-require_once $__dir . '/HTMLPurifier/ChildDef/Empty.php';
-require_once $__dir . '/HTMLPurifier/ChildDef/Required.php';
-require_once $__dir . '/HTMLPurifier/ChildDef/Optional.php';
-require_once $__dir . '/HTMLPurifier/ChildDef/StrictBlockquote.php';
-require_once $__dir . '/HTMLPurifier/ChildDef/Table.php';
-require_once $__dir . '/HTMLPurifier/DefinitionCache/Decorator.php';
-require_once $__dir . '/HTMLPurifier/DefinitionCache/Null.php';
-require_once $__dir . '/HTMLPurifier/DefinitionCache/Serializer.php';
-require_once $__dir . '/HTMLPurifier/DefinitionCache/Decorator/Cleanup.php';
-require_once $__dir . '/HTMLPurifier/DefinitionCache/Decorator/Memory.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Bdo.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/CommonAttributes.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Edit.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Forms.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Hypertext.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Image.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Legacy.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/List.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Name.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Object.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Presentation.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Proprietary.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Ruby.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/SafeEmbed.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/SafeObject.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Scripting.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/StyleAttribute.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Tables.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Target.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Text.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/XMLCommonAttributes.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy/Name.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy/Proprietary.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy/Strict.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy/Transitional.php';
-require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy/XHTML.php';
-require_once $__dir . '/HTMLPurifier/Injector/AutoParagraph.php';
-require_once $__dir . '/HTMLPurifier/Injector/DisplayLinkURI.php';
-require_once $__dir . '/HTMLPurifier/Injector/Linkify.php';
-require_once $__dir . '/HTMLPurifier/Injector/PurifierLinkify.php';
-require_once $__dir . '/HTMLPurifier/Injector/RemoveEmpty.php';
-require_once $__dir . '/HTMLPurifier/Injector/SafeObject.php';
-require_once $__dir . '/HTMLPurifier/Lexer/DOMLex.php';
-require_once $__dir . '/HTMLPurifier/Lexer/DirectLex.php';
-require_once $__dir . '/HTMLPurifier/Strategy/Composite.php';
-require_once $__dir . '/HTMLPurifier/Strategy/Core.php';
-require_once $__dir . '/HTMLPurifier/Strategy/FixNesting.php';
-require_once $__dir . '/HTMLPurifier/Strategy/MakeWellFormed.php';
-require_once $__dir . '/HTMLPurifier/Strategy/RemoveForeignElements.php';
-require_once $__dir . '/HTMLPurifier/Strategy/ValidateAttributes.php';
-require_once $__dir . '/HTMLPurifier/TagTransform/Font.php';
-require_once $__dir . '/HTMLPurifier/TagTransform/Simple.php';
-require_once $__dir . '/HTMLPurifier/Token/Comment.php';
-require_once $__dir . '/HTMLPurifier/Token/Tag.php';
-require_once $__dir . '/HTMLPurifier/Token/Empty.php';
-require_once $__dir . '/HTMLPurifier/Token/End.php';
-require_once $__dir . '/HTMLPurifier/Token/Start.php';
-require_once $__dir . '/HTMLPurifier/Token/Text.php';
-require_once $__dir . '/HTMLPurifier/URIFilter/DisableExternal.php';
-require_once $__dir . '/HTMLPurifier/URIFilter/DisableExternalResources.php';
-require_once $__dir . '/HTMLPurifier/URIFilter/HostBlacklist.php';
-require_once $__dir . '/HTMLPurifier/URIFilter/MakeAbsolute.php';
-require_once $__dir . '/HTMLPurifier/URIFilter/Munge.php';
-require_once $__dir . '/HTMLPurifier/URIScheme/ftp.php';
-require_once $__dir . '/HTMLPurifier/URIScheme/http.php';
-require_once $__dir . '/HTMLPurifier/URIScheme/https.php';
-require_once $__dir . '/HTMLPurifier/URIScheme/mailto.php';
-require_once $__dir . '/HTMLPurifier/URIScheme/news.php';
-require_once $__dir . '/HTMLPurifier/URIScheme/nntp.php';
-require_once $__dir . '/HTMLPurifier/VarParser/Flexible.php';
-require_once $__dir . '/HTMLPurifier/VarParser/Native.php';
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrCollections.php b/extlib/HTMLPurifier/HTMLPurifier/AttrCollections.php
deleted file mode 100644
index 555b86d042..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrCollections.php
+++ /dev/null
@@ -1,128 +0,0 @@
-<?php
-
-/**
- * Defines common attribute collections that modules reference
- */
-
-class HTMLPurifier_AttrCollections
-{
-
-    /**
-     * Associative array of attribute collections, indexed by name
-     */
-    public $info = array();
-
-    /**
-     * Performs all expansions on internal data for use by other inclusions
-     * It also collects all attribute collection extensions from
-     * modules
-     * @param $attr_types HTMLPurifier_AttrTypes instance
-     * @param $modules Hash array of HTMLPurifier_HTMLModule members
-     */
-    public function __construct($attr_types, $modules) {
-        // load extensions from the modules
-        foreach ($modules as $module) {
-            foreach ($module->attr_collections as $coll_i => $coll) {
-                if (!isset($this->info[$coll_i])) {
-                    $this->info[$coll_i] = array();
-                }
-                foreach ($coll as $attr_i => $attr) {
-                    if ($attr_i === 0 && isset($this->info[$coll_i][$attr_i])) {
-                        // merge in includes
-                        $this->info[$coll_i][$attr_i] = array_merge(
-                            $this->info[$coll_i][$attr_i], $attr);
-                        continue;
-                    }
-                    $this->info[$coll_i][$attr_i] = $attr;
-                }
-            }
-        }
-        // perform internal expansions and inclusions
-        foreach ($this->info as $name => $attr) {
-            // merge attribute collections that include others
-            $this->performInclusions($this->info[$name]);
-            // replace string identifiers with actual attribute objects
-            $this->expandIdentifiers($this->info[$name], $attr_types);
-        }
-    }
-
-    /**
-     * Takes a reference to an attribute associative array and performs
-     * all inclusions specified by the zero index.
-     * @param &$attr Reference to attribute array
-     */
-    public function performInclusions(&$attr) {
-        if (!isset($attr[0])) return;
-        $merge = $attr[0];
-        $seen  = array(); // recursion guard
-        // loop through all the inclusions
-        for ($i = 0; isset($merge[$i]); $i++) {
-            if (isset($seen[$merge[$i]])) continue;
-            $seen[$merge[$i]] = true;
-            // foreach attribute of the inclusion, copy it over
-            if (!isset($this->info[$merge[$i]])) continue;
-            foreach ($this->info[$merge[$i]] as $key => $value) {
-                if (isset($attr[$key])) continue; // also catches more inclusions
-                $attr[$key] = $value;
-            }
-            if (isset($this->info[$merge[$i]][0])) {
-                // recursion
-                $merge = array_merge($merge, $this->info[$merge[$i]][0]);
-            }
-        }
-        unset($attr[0]);
-    }
-
-    /**
-     * Expands all string identifiers in an attribute array by replacing
-     * them with the appropriate values inside HTMLPurifier_AttrTypes
-     * @param &$attr Reference to attribute array
-     * @param $attr_types HTMLPurifier_AttrTypes instance
-     */
-    public function expandIdentifiers(&$attr, $attr_types) {
-
-        // because foreach will process new elements we add, make sure we
-        // skip duplicates
-        $processed = array();
-
-        foreach ($attr as $def_i => $def) {
-            // skip inclusions
-            if ($def_i === 0) continue;
-
-            if (isset($processed[$def_i])) continue;
-
-            // determine whether or not attribute is required
-            if ($required = (strpos($def_i, '*') !== false)) {
-                // rename the definition
-                unset($attr[$def_i]);
-                $def_i = trim($def_i, '*');
-                $attr[$def_i] = $def;
-            }
-
-            $processed[$def_i] = true;
-
-            // if we've already got a literal object, move on
-            if (is_object($def)) {
-                // preserve previous required
-                $attr[$def_i]->required = ($required || $attr[$def_i]->required);
-                continue;
-            }
-
-            if ($def === false) {
-                unset($attr[$def_i]);
-                continue;
-            }
-
-            if ($t = $attr_types->get($def)) {
-                $attr[$def_i] = $t;
-                $attr[$def_i]->required = $required;
-            } else {
-                unset($attr[$def_i]);
-            }
-        }
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef.php
deleted file mode 100644
index d32fa62d6a..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef.php
+++ /dev/null
@@ -1,87 +0,0 @@
-<?php
-
-/**
- * Base class for all validating attribute definitions.
- *
- * This family of classes forms the core for not only HTML attribute validation,
- * but also any sort of string that needs to be validated or cleaned (which
- * means CSS properties and composite definitions are defined here too).
- * Besides defining (through code) what precisely makes the string valid,
- * subclasses are also responsible for cleaning the code if possible.
- */
-
-abstract class HTMLPurifier_AttrDef
-{
-
-    /**
-     * Tells us whether or not an HTML attribute is minimized. Has no
-     * meaning in other contexts.
-     */
-    public $minimized = false;
-
-    /**
-     * Tells us whether or not an HTML attribute is required. Has no
-     * meaning in other contexts
-     */
-    public $required = false;
-
-    /**
-     * Validates and cleans passed string according to a definition.
-     *
-     * @param $string String to be validated and cleaned.
-     * @param $config Mandatory HTMLPurifier_Config object.
-     * @param $context Mandatory HTMLPurifier_AttrContext object.
-     */
-    abstract public function validate($string, $config, $context);
-
-    /**
-     * Convenience method that parses a string as if it were CDATA.
-     *
-     * This method process a string in the manner specified at
-     * <http://www.w3.org/TR/html4/types.html#h-6.2> by removing
-     * leading and trailing whitespace, ignoring line feeds, and replacing
-     * carriage returns and tabs with spaces.  While most useful for HTML
-     * attributes specified as CDATA, it can also be applied to most CSS
-     * values.
-     *
-     * @note This method is not entirely standards compliant, as trim() removes
-     *       more types of whitespace than specified in the spec. In practice,
-     *       this is rarely a problem, as those extra characters usually have
-     *       already been removed by HTMLPurifier_Encoder.
-     *
-     * @warning This processing is inconsistent with XML's whitespace handling
-     *          as specified by section 3.3.3 and referenced XHTML 1.0 section
-     *          4.7.  However, note that we are NOT necessarily
-     *          parsing XML, thus, this behavior may still be correct. We
-     *          assume that newlines have been normalized.
-     */
-    public function parseCDATA($string) {
-        $string = trim($string);
-        $string = str_replace(array("\n", "\t", "\r"), ' ', $string);
-        return $string;
-    }
-
-    /**
-     * Factory method for creating this class from a string.
-     * @param $string String construction info
-     * @return Created AttrDef object corresponding to $string
-     */
-    public function make($string) {
-        // default implementation, return a flyweight of this object.
-        // If $string has an effect on the returned object (i.e. you
-        // need to overload this method), it is best
-        // to clone or instantiate new copies. (Instantiation is safer.)
-        return $this;
-    }
-
-    /**
-     * Removes spaces from rgb(0, 0, 0) so that shorthand CSS properties work
-     * properly. THIS IS A HACK!
-     */
-    protected function mungeRgb($string) {
-        return preg_replace('/rgb\((\d+)\s*,\s*(\d+)\s*,\s*(\d+)\)/', 'rgb(\1,\2,\3)', $string);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS.php
deleted file mode 100644
index 953e706755..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS.php
+++ /dev/null
@@ -1,87 +0,0 @@
-<?php
-
-/**
- * Validates the HTML attribute style, otherwise known as CSS.
- * @note We don't implement the whole CSS specification, so it might be
- *       difficult to reuse this component in the context of validating
- *       actual stylesheet declarations.
- * @note If we were really serious about validating the CSS, we would
- *       tokenize the styles and then parse the tokens. Obviously, we
- *       are not doing that. Doing that could seriously harm performance,
- *       but would make these components a lot more viable for a CSS
- *       filtering solution.
- */
-class HTMLPurifier_AttrDef_CSS extends HTMLPurifier_AttrDef
-{
-
-    public function validate($css, $config, $context) {
-
-        $css = $this->parseCDATA($css);
-
-        $definition = $config->getCSSDefinition();
-
-        // we're going to break the spec and explode by semicolons.
-        // This is because semicolon rarely appears in escaped form
-        // Doing this is generally flaky but fast
-        // IT MIGHT APPEAR IN URIs, see HTMLPurifier_AttrDef_CSSURI
-        // for details
-
-        $declarations = explode(';', $css);
-        $propvalues = array();
-
-        /**
-         * Name of the current CSS property being validated.
-         */
-        $property = false;
-        $context->register('CurrentCSSProperty', $property);
-
-        foreach ($declarations as $declaration) {
-            if (!$declaration) continue;
-            if (!strpos($declaration, ':')) continue;
-            list($property, $value) = explode(':', $declaration, 2);
-            $property = trim($property);
-            $value    = trim($value);
-            $ok = false;
-            do {
-                if (isset($definition->info[$property])) {
-                    $ok = true;
-                    break;
-                }
-                if (ctype_lower($property)) break;
-                $property = strtolower($property);
-                if (isset($definition->info[$property])) {
-                    $ok = true;
-                    break;
-                }
-            } while(0);
-            if (!$ok) continue;
-            // inefficient call, since the validator will do this again
-            if (strtolower(trim($value)) !== 'inherit') {
-                // inherit works for everything (but only on the base property)
-                $result = $definition->info[$property]->validate(
-                    $value, $config, $context );
-            } else {
-                $result = 'inherit';
-            }
-            if ($result === false) continue;
-            $propvalues[$property] = $result;
-        }
-
-        $context->destroy('CurrentCSSProperty');
-
-        // procedure does not write the new CSS simultaneously, so it's
-        // slightly inefficient, but it's the only way of getting rid of
-        // duplicates. Perhaps config to optimize it, but not now.
-
-        $new_declarations = '';
-        foreach ($propvalues as $prop => $value) {
-            $new_declarations .= "$prop:$value;";
-        }
-
-        return $new_declarations ? $new_declarations : false;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/AlphaValue.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/AlphaValue.php
deleted file mode 100644
index 292c040d4b..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/AlphaValue.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-class HTMLPurifier_AttrDef_CSS_AlphaValue extends HTMLPurifier_AttrDef_CSS_Number
-{
-
-    public function __construct() {
-        parent::__construct(false); // opacity is non-negative, but we will clamp it
-    }
-
-    public function validate($number, $config, $context) {
-        $result = parent::validate($number, $config, $context);
-        if ($result === false) return $result;
-        $float = (float) $result;
-        if ($float < 0.0) $result = '0';
-        if ($float > 1.0) $result = '1';
-        return $result;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Background.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Background.php
deleted file mode 100644
index 3a3d20cd6a..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Background.php
+++ /dev/null
@@ -1,87 +0,0 @@
-<?php
-
-/**
- * Validates shorthand CSS property background.
- * @warning Does not support url tokens that have internal spaces.
- */
-class HTMLPurifier_AttrDef_CSS_Background extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Local copy of component validators.
-     * @note See HTMLPurifier_AttrDef_Font::$info for a similar impl.
-     */
-    protected $info;
-
-    public function __construct($config) {
-        $def = $config->getCSSDefinition();
-        $this->info['background-color'] = $def->info['background-color'];
-        $this->info['background-image'] = $def->info['background-image'];
-        $this->info['background-repeat'] = $def->info['background-repeat'];
-        $this->info['background-attachment'] = $def->info['background-attachment'];
-        $this->info['background-position'] = $def->info['background-position'];
-    }
-
-    public function validate($string, $config, $context) {
-
-        // regular pre-processing
-        $string = $this->parseCDATA($string);
-        if ($string === '') return false;
-
-        // munge rgb() decl if necessary
-        $string = $this->mungeRgb($string);
-
-        // assumes URI doesn't have spaces in it
-        $bits = explode(' ', strtolower($string)); // bits to process
-
-        $caught = array();
-        $caught['color']    = false;
-        $caught['image']    = false;
-        $caught['repeat']   = false;
-        $caught['attachment'] = false;
-        $caught['position'] = false;
-
-        $i = 0; // number of catches
-        $none = false;
-
-        foreach ($bits as $bit) {
-            if ($bit === '') continue;
-            foreach ($caught as $key => $status) {
-                if ($key != 'position') {
-                    if ($status !== false) continue;
-                    $r = $this->info['background-' . $key]->validate($bit, $config, $context);
-                } else {
-                    $r = $bit;
-                }
-                if ($r === false) continue;
-                if ($key == 'position') {
-                    if ($caught[$key] === false) $caught[$key] = '';
-                    $caught[$key] .= $r . ' ';
-                } else {
-                    $caught[$key] = $r;
-                }
-                $i++;
-                break;
-            }
-        }
-
-        if (!$i) return false;
-        if ($caught['position'] !== false) {
-            $caught['position'] = $this->info['background-position']->
-                validate($caught['position'], $config, $context);
-        }
-
-        $ret = array();
-        foreach ($caught as $value) {
-            if ($value === false) continue;
-            $ret[] = $value;
-        }
-
-        if (empty($ret)) return false;
-        return implode(' ', $ret);
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/BackgroundPosition.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/BackgroundPosition.php
deleted file mode 100644
index 35df3985e2..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/BackgroundPosition.php
+++ /dev/null
@@ -1,126 +0,0 @@
-<?php
-
-/* W3C says:
-    [ // adjective and number must be in correct order, even if
-      // you could switch them without introducing ambiguity.
-      // some browsers support that syntax
-        [
-            <percentage> | <length> | left | center | right
-        ]
-        [
-            <percentage> | <length> | top | center | bottom
-        ]?
-    ] |
-    [ // this signifies that the vertical and horizontal adjectives
-      // can be arbitrarily ordered, however, there can only be two,
-      // one of each, or none at all
-        [
-            left | center | right
-        ] ||
-        [
-            top | center | bottom
-        ]
-    ]
-    top, left = 0%
-    center, (none) = 50%
-    bottom, right = 100%
-*/
-
-/* QuirksMode says:
-    keyword + length/percentage must be ordered correctly, as per W3C
-
-    Internet Explorer and Opera, however, support arbitrary ordering. We
-    should fix it up.
-
-    Minor issue though, not strictly necessary.
-*/
-
-// control freaks may appreciate the ability to convert these to
-// percentages or something, but it's not necessary
-
-/**
- * Validates the value of background-position.
- */
-class HTMLPurifier_AttrDef_CSS_BackgroundPosition extends HTMLPurifier_AttrDef
-{
-
-    protected $length;
-    protected $percentage;
-
-    public function __construct() {
-        $this->length     = new HTMLPurifier_AttrDef_CSS_Length();
-        $this->percentage = new HTMLPurifier_AttrDef_CSS_Percentage();
-    }
-
-    public function validate($string, $config, $context) {
-        $string = $this->parseCDATA($string);
-        $bits = explode(' ', $string);
-
-        $keywords = array();
-        $keywords['h'] = false; // left, right
-        $keywords['v'] = false; // top, bottom
-        $keywords['c'] = false; // center
-        $measures = array();
-
-        $i = 0;
-
-        $lookup = array(
-            'top' => 'v',
-            'bottom' => 'v',
-            'left' => 'h',
-            'right' => 'h',
-            'center' => 'c'
-        );
-
-        foreach ($bits as $bit) {
-            if ($bit === '') continue;
-
-            // test for keyword
-            $lbit = ctype_lower($bit) ? $bit : strtolower($bit);
-            if (isset($lookup[$lbit])) {
-                $status = $lookup[$lbit];
-                $keywords[$status] = $lbit;
-                $i++;
-            }
-
-            // test for length
-            $r = $this->length->validate($bit, $config, $context);
-            if ($r !== false) {
-                $measures[] = $r;
-                $i++;
-            }
-
-            // test for percentage
-            $r = $this->percentage->validate($bit, $config, $context);
-            if ($r !== false) {
-                $measures[] = $r;
-                $i++;
-            }
-
-        }
-
-        if (!$i) return false; // no valid values were caught
-
-
-        $ret = array();
-
-        // first keyword
-        if     ($keywords['h'])     $ret[] = $keywords['h'];
-        elseif (count($measures))   $ret[] = array_shift($measures);
-        elseif ($keywords['c']) {
-            $ret[] = $keywords['c'];
-            $keywords['c'] = false; // prevent re-use: center = center center
-        }
-
-        if     ($keywords['v'])     $ret[] = $keywords['v'];
-        elseif (count($measures))   $ret[] = array_shift($measures);
-        elseif ($keywords['c'])     $ret[] = $keywords['c'];
-
-        if (empty($ret)) return false;
-        return implode(' ', $ret);
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Border.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Border.php
deleted file mode 100644
index 42a1d1b4ae..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Border.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php
-
-/**
- * Validates the border property as defined by CSS.
- */
-class HTMLPurifier_AttrDef_CSS_Border extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Local copy of properties this property is shorthand for.
-     */
-    protected $info = array();
-
-    public function __construct($config) {
-        $def = $config->getCSSDefinition();
-        $this->info['border-width'] = $def->info['border-width'];
-        $this->info['border-style'] = $def->info['border-style'];
-        $this->info['border-top-color'] = $def->info['border-top-color'];
-    }
-
-    public function validate($string, $config, $context) {
-        $string = $this->parseCDATA($string);
-        $string = $this->mungeRgb($string);
-        $bits = explode(' ', $string);
-        $done = array(); // segments we've finished
-        $ret = ''; // return value
-        foreach ($bits as $bit) {
-            foreach ($this->info as $propname => $validator) {
-                if (isset($done[$propname])) continue;
-                $r = $validator->validate($bit, $config, $context);
-                if ($r !== false) {
-                    $ret .= $r . ' ';
-                    $done[$propname] = true;
-                    break;
-                }
-            }
-        }
-        return rtrim($ret);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Color.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Color.php
deleted file mode 100644
index 07f95a6719..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Color.php
+++ /dev/null
@@ -1,78 +0,0 @@
-<?php
-
-/**
- * Validates Color as defined by CSS.
- */
-class HTMLPurifier_AttrDef_CSS_Color extends HTMLPurifier_AttrDef
-{
-
-    public function validate($color, $config, $context) {
-
-        static $colors = null;
-        if ($colors === null) $colors = $config->get('Core.ColorKeywords');
-
-        $color = trim($color);
-        if ($color === '') return false;
-
-        $lower = strtolower($color);
-        if (isset($colors[$lower])) return $colors[$lower];
-
-        if (strpos($color, 'rgb(') !== false) {
-            // rgb literal handling
-            $length = strlen($color);
-            if (strpos($color, ')') !== $length - 1) return false;
-            $triad = substr($color, 4, $length - 4 - 1);
-            $parts = explode(',', $triad);
-            if (count($parts) !== 3) return false;
-            $type = false; // to ensure that they're all the same type
-            $new_parts = array();
-            foreach ($parts as $part) {
-                $part = trim($part);
-                if ($part === '') return false;
-                $length = strlen($part);
-                if ($part[$length - 1] === '%') {
-                    // handle percents
-                    if (!$type) {
-                        $type = 'percentage';
-                    } elseif ($type !== 'percentage') {
-                        return false;
-                    }
-                    $num = (float) substr($part, 0, $length - 1);
-                    if ($num < 0) $num = 0;
-                    if ($num > 100) $num = 100;
-                    $new_parts[] = "$num%";
-                } else {
-                    // handle integers
-                    if (!$type) {
-                        $type = 'integer';
-                    } elseif ($type !== 'integer') {
-                        return false;
-                    }
-                    $num = (int) $part;
-                    if ($num < 0) $num = 0;
-                    if ($num > 255) $num = 255;
-                    $new_parts[] = (string) $num;
-                }
-            }
-            $new_triad = implode(',', $new_parts);
-            $color = "rgb($new_triad)";
-        } else {
-            // hexadecimal handling
-            if ($color[0] === '#') {
-                $hex = substr($color, 1);
-            } else {
-                $hex = $color;
-                $color = '#' . $color;
-            }
-            $length = strlen($hex);
-            if ($length !== 3 && $length !== 6) return false;
-            if (!ctype_xdigit($hex)) return false;
-        }
-
-        return $color;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Composite.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Composite.php
deleted file mode 100644
index de1289cba8..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Composite.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-
-/**
- * Allows multiple validators to attempt to validate attribute.
- *
- * Composite is just what it sounds like: a composite of many validators.
- * This means that multiple HTMLPurifier_AttrDef objects will have a whack
- * at the string.  If one of them passes, that's what is returned.  This is
- * especially useful for CSS values, which often are a choice between
- * an enumerated set of predefined values or a flexible data type.
- */
-class HTMLPurifier_AttrDef_CSS_Composite extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * List of HTMLPurifier_AttrDef objects that may process strings
-     * @todo Make protected
-     */
-    public $defs;
-
-    /**
-     * @param $defs List of HTMLPurifier_AttrDef objects
-     */
-    public function __construct($defs) {
-        $this->defs = $defs;
-    }
-
-    public function validate($string, $config, $context) {
-        foreach ($this->defs as $i => $def) {
-            $result = $this->defs[$i]->validate($string, $config, $context);
-            if ($result !== false) return $result;
-        }
-        return false;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php
deleted file mode 100644
index 6599c5b2dd..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-
-/**
- * Decorator which enables CSS properties to be disabled for specific elements.
- */
-class HTMLPurifier_AttrDef_CSS_DenyElementDecorator extends HTMLPurifier_AttrDef
-{
-    public $def, $element;
-
-    /**
-     * @param $def Definition to wrap
-     * @param $element Element to deny
-     */
-    public function __construct($def, $element) {
-        $this->def = $def;
-        $this->element = $element;
-    }
-    /**
-     * Checks if CurrentToken is set and equal to $this->element
-     */
-    public function validate($string, $config, $context) {
-        $token = $context->get('CurrentToken', true);
-        if ($token && $token->name == $this->element) return false;
-        return $this->def->validate($string, $config, $context);
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Filter.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Filter.php
deleted file mode 100644
index 147894b861..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Filter.php
+++ /dev/null
@@ -1,54 +0,0 @@
-<?php
-
-/**
- * Microsoft's proprietary filter: CSS property
- * @note Currently supports the alpha filter. In the future, this will
- *       probably need an extensible framework
- */
-class HTMLPurifier_AttrDef_CSS_Filter extends HTMLPurifier_AttrDef
-{
-
-    protected $intValidator;
-
-    public function __construct() {
-        $this->intValidator = new HTMLPurifier_AttrDef_Integer();
-    }
-
-    public function validate($value, $config, $context) {
-        $value = $this->parseCDATA($value);
-        if ($value === 'none') return $value;
-        // if we looped this we could support multiple filters
-        $function_length = strcspn($value, '(');
-        $function = trim(substr($value, 0, $function_length));
-        if ($function !== 'alpha' &&
-            $function !== 'Alpha' &&
-            $function !== 'progid:DXImageTransform.Microsoft.Alpha'
-            ) return false;
-        $cursor = $function_length + 1;
-        $parameters_length = strcspn($value, ')', $cursor);
-        $parameters = substr($value, $cursor, $parameters_length);
-        $params = explode(',', $parameters);
-        $ret_params = array();
-        $lookup = array();
-        foreach ($params as $param) {
-            list($key, $value) = explode('=', $param);
-            $key   = trim($key);
-            $value = trim($value);
-            if (isset($lookup[$key])) continue;
-            if ($key !== 'opacity') continue;
-            $value = $this->intValidator->validate($value, $config, $context);
-            if ($value === false) continue;
-            $int = (int) $value;
-            if ($int > 100) $value = '100';
-            if ($int < 0) $value = '0';
-            $ret_params[] = "$key=$value";
-            $lookup[$key] = true;
-        }
-        $ret_parameters = implode(',', $ret_params);
-        $ret_function = "$function($ret_parameters)";
-        return $ret_function;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Font.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Font.php
deleted file mode 100644
index 699ee0b701..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Font.php
+++ /dev/null
@@ -1,149 +0,0 @@
-<?php
-
-/**
- * Validates shorthand CSS property font.
- */
-class HTMLPurifier_AttrDef_CSS_Font extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Local copy of component validators.
-     *
-     * @note If we moved specific CSS property definitions to their own
-     *       classes instead of having them be assembled at run time by
-     *       CSSDefinition, this wouldn't be necessary.  We'd instantiate
-     *       our own copies.
-     */
-    protected $info = array();
-
-    public function __construct($config) {
-        $def = $config->getCSSDefinition();
-        $this->info['font-style']   = $def->info['font-style'];
-        $this->info['font-variant'] = $def->info['font-variant'];
-        $this->info['font-weight']  = $def->info['font-weight'];
-        $this->info['font-size']    = $def->info['font-size'];
-        $this->info['line-height']  = $def->info['line-height'];
-        $this->info['font-family']  = $def->info['font-family'];
-    }
-
-    public function validate($string, $config, $context) {
-
-        static $system_fonts = array(
-            'caption' => true,
-            'icon' => true,
-            'menu' => true,
-            'message-box' => true,
-            'small-caption' => true,
-            'status-bar' => true
-        );
-
-        // regular pre-processing
-        $string = $this->parseCDATA($string);
-        if ($string === '') return false;
-
-        // check if it's one of the keywords
-        $lowercase_string = strtolower($string);
-        if (isset($system_fonts[$lowercase_string])) {
-            return $lowercase_string;
-        }
-
-        $bits = explode(' ', $string); // bits to process
-        $stage = 0; // this indicates what we're looking for
-        $caught = array(); // which stage 0 properties have we caught?
-        $stage_1 = array('font-style', 'font-variant', 'font-weight');
-        $final = ''; // output
-
-        for ($i = 0, $size = count($bits); $i < $size; $i++) {
-            if ($bits[$i] === '') continue;
-            switch ($stage) {
-
-                // attempting to catch font-style, font-variant or font-weight
-                case 0:
-                    foreach ($stage_1 as $validator_name) {
-                        if (isset($caught[$validator_name])) continue;
-                        $r = $this->info[$validator_name]->validate(
-                                                $bits[$i], $config, $context);
-                        if ($r !== false) {
-                            $final .= $r . ' ';
-                            $caught[$validator_name] = true;
-                            break;
-                        }
-                    }
-                    // all three caught, continue on
-                    if (count($caught) >= 3) $stage = 1;
-                    if ($r !== false) break;
-
-                // attempting to catch font-size and perhaps line-height
-                case 1:
-                    $found_slash = false;
-                    if (strpos($bits[$i], '/') !== false) {
-                        list($font_size, $line_height) =
-                                                    explode('/', $bits[$i]);
-                        if ($line_height === '') {
-                            // ooh, there's a space after the slash!
-                            $line_height = false;
-                            $found_slash = true;
-                        }
-                    } else {
-                        $font_size = $bits[$i];
-                        $line_height = false;
-                    }
-                    $r = $this->info['font-size']->validate(
-                                              $font_size, $config, $context);
-                    if ($r !== false) {
-                        $final .= $r;
-                        // attempt to catch line-height
-                        if ($line_height === false) {
-                            // we need to scroll forward
-                            for ($j = $i + 1; $j < $size; $j++) {
-                                if ($bits[$j] === '') continue;
-                                if ($bits[$j] === '/') {
-                                    if ($found_slash) {
-                                        return false;
-                                    } else {
-                                        $found_slash = true;
-                                        continue;
-                                    }
-                                }
-                                $line_height = $bits[$j];
-                                break;
-                            }
-                        } else {
-                            // slash already found
-                            $found_slash = true;
-                            $j = $i;
-                        }
-                        if ($found_slash) {
-                            $i = $j;
-                            $r = $this->info['line-height']->validate(
-                                              $line_height, $config, $context);
-                            if ($r !== false) {
-                                $final .= '/' . $r;
-                            }
-                        }
-                        $final .= ' ';
-                        $stage = 2;
-                        break;
-                    }
-                    return false;
-
-                // attempting to catch font-family
-                case 2:
-                    $font_family =
-                        implode(' ', array_slice($bits, $i, $size - $i));
-                    $r = $this->info['font-family']->validate(
-                                              $font_family, $config, $context);
-                    if ($r !== false) {
-                        $final .= $r . ' ';
-                        // processing completed successfully
-                        return rtrim($final);
-                    }
-                    return false;
-            }
-        }
-        return false;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/FontFamily.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/FontFamily.php
deleted file mode 100644
index 705ac893d1..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/FontFamily.php
+++ /dev/null
@@ -1,90 +0,0 @@
-<?php
-
-/**
- * Validates a font family list according to CSS spec
- * @todo whitelisting allowed fonts would be nice
- */
-class HTMLPurifier_AttrDef_CSS_FontFamily extends HTMLPurifier_AttrDef
-{
-
-    public function validate($string, $config, $context) {
-        static $generic_names = array(
-            'serif' => true,
-            'sans-serif' => true,
-            'monospace' => true,
-            'fantasy' => true,
-            'cursive' => true
-        );
-
-        // assume that no font names contain commas in them
-        $fonts = explode(',', $string);
-        $final = '';
-        foreach($fonts as $font) {
-            $font = trim($font);
-            if ($font === '') continue;
-            // match a generic name
-            if (isset($generic_names[$font])) {
-                $final .= $font . ', ';
-                continue;
-            }
-            // match a quoted name
-            if ($font[0] === '"' || $font[0] === "'") {
-                $length = strlen($font);
-                if ($length <= 2) continue;
-                $quote = $font[0];
-                if ($font[$length - 1] !== $quote) continue;
-                $font = substr($font, 1, $length - 2);
-
-                $new_font = '';
-                for ($i = 0, $c = strlen($font); $i < $c; $i++) {
-                    if ($font[$i] === '\\') {
-                        $i++;
-                        if ($i >= $c) {
-                            $new_font .= '\\';
-                            break;
-                        }
-                        if (ctype_xdigit($font[$i])) {
-                            $code = $font[$i];
-                            for ($a = 1, $i++; $i < $c && $a < 6; $i++, $a++) {
-                                if (!ctype_xdigit($font[$i])) break;
-                                $code .= $font[$i];
-                            }
-                            // We have to be extremely careful when adding
-                            // new characters, to make sure we're not breaking
-                            // the encoding.
-                            $char = HTMLPurifier_Encoder::unichr(hexdec($code));
-                            if (HTMLPurifier_Encoder::cleanUTF8($char) === '') continue;
-                            $new_font .= $char;
-                            if ($i < $c && trim($font[$i]) !== '') $i--;
-                            continue;
-                        }
-                        if ($font[$i] === "\n") continue;
-                    }
-                    $new_font .= $font[$i];
-                }
-
-                $font = $new_font;
-            }
-            // $font is a pure representation of the font name
-
-            if (ctype_alnum($font) && $font !== '') {
-                // very simple font, allow it in unharmed
-                $final .= $font . ', ';
-                continue;
-            }
-
-            // complicated font, requires quoting
-
-            // armor single quotes and new lines
-            $font = str_replace("\\", "\\\\", $font);
-            $font = str_replace("'", "\\'", $font);
-            $final .= "'$font', ";
-        }
-        $final = rtrim($final, ', ');
-        if ($final === '') return false;
-        return $final;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/ImportantDecorator.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/ImportantDecorator.php
deleted file mode 100644
index 4e6b35e5a0..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/ImportantDecorator.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-
-/**
- * Decorator which enables !important to be used in CSS values.
- */
-class HTMLPurifier_AttrDef_CSS_ImportantDecorator extends HTMLPurifier_AttrDef
-{
-    public $def, $allow;
-
-    /**
-     * @param $def Definition to wrap
-     * @param $allow Whether or not to allow !important
-     */
-    public function __construct($def, $allow = false) {
-        $this->def = $def;
-        $this->allow = $allow;
-    }
-    /**
-     * Intercepts and removes !important if necessary
-     */
-    public function validate($string, $config, $context) {
-        // test for ! and important tokens
-        $string = trim($string);
-        $is_important = false;
-        // :TODO: optimization: test directly for !important and ! important
-        if (strlen($string) >= 9 && substr($string, -9) === 'important') {
-            $temp = rtrim(substr($string, 0, -9));
-            // use a temp, because we might want to restore important
-            if (strlen($temp) >= 1 && substr($temp, -1) === '!') {
-                $string = rtrim(substr($temp, 0, -1));
-                $is_important = true;
-            }
-        }
-        $string = $this->def->validate($string, $config, $context);
-        if ($this->allow && $is_important) $string .= ' !important';
-        return $string;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Length.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Length.php
deleted file mode 100644
index a07ec58135..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Length.php
+++ /dev/null
@@ -1,47 +0,0 @@
-<?php
-
-/**
- * Represents a Length as defined by CSS.
- */
-class HTMLPurifier_AttrDef_CSS_Length extends HTMLPurifier_AttrDef
-{
-
-    protected $min, $max;
-
-    /**
-     * @param HTMLPurifier_Length $max Minimum length, or null for no bound. String is also acceptable.
-     * @param HTMLPurifier_Length $max Maximum length, or null for no bound. String is also acceptable.
-     */
-    public function __construct($min = null, $max = null) {
-        $this->min = $min !== null ? HTMLPurifier_Length::make($min) : null;
-        $this->max = $max !== null ? HTMLPurifier_Length::make($max) : null;
-    }
-
-    public function validate($string, $config, $context) {
-        $string = $this->parseCDATA($string);
-
-        // Optimizations
-        if ($string === '') return false;
-        if ($string === '0') return '0';
-        if (strlen($string) === 1) return false;
-
-        $length = HTMLPurifier_Length::make($string);
-        if (!$length->isValid()) return false;
-
-        if ($this->min) {
-            $c = $length->compareTo($this->min);
-            if ($c === false) return false;
-            if ($c < 0) return false;
-        }
-        if ($this->max) {
-            $c = $length->compareTo($this->max);
-            if ($c === false) return false;
-            if ($c > 0) return false;
-        }
-
-        return $length->toString();
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/ListStyle.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/ListStyle.php
deleted file mode 100644
index 4406868c08..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/ListStyle.php
+++ /dev/null
@@ -1,78 +0,0 @@
-<?php
-
-/**
- * Validates shorthand CSS property list-style.
- * @warning Does not support url tokens that have internal spaces.
- */
-class HTMLPurifier_AttrDef_CSS_ListStyle extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Local copy of component validators.
-     * @note See HTMLPurifier_AttrDef_CSS_Font::$info for a similar impl.
-     */
-    protected $info;
-
-    public function __construct($config) {
-        $def = $config->getCSSDefinition();
-        $this->info['list-style-type']     = $def->info['list-style-type'];
-        $this->info['list-style-position'] = $def->info['list-style-position'];
-        $this->info['list-style-image'] = $def->info['list-style-image'];
-    }
-
-    public function validate($string, $config, $context) {
-
-        // regular pre-processing
-        $string = $this->parseCDATA($string);
-        if ($string === '') return false;
-
-        // assumes URI doesn't have spaces in it
-        $bits = explode(' ', strtolower($string)); // bits to process
-
-        $caught = array();
-        $caught['type']     = false;
-        $caught['position'] = false;
-        $caught['image']    = false;
-
-        $i = 0; // number of catches
-        $none = false;
-
-        foreach ($bits as $bit) {
-            if ($i >= 3) return; // optimization bit
-            if ($bit === '') continue;
-            foreach ($caught as $key => $status) {
-                if ($status !== false) continue;
-                $r = $this->info['list-style-' . $key]->validate($bit, $config, $context);
-                if ($r === false) continue;
-                if ($r === 'none') {
-                    if ($none) continue;
-                    else $none = true;
-                    if ($key == 'image') continue;
-                }
-                $caught[$key] = $r;
-                $i++;
-                break;
-            }
-        }
-
-        if (!$i) return false;
-
-        $ret = array();
-
-        // construct type
-        if ($caught['type']) $ret[] = $caught['type'];
-
-        // construct image
-        if ($caught['image']) $ret[] = $caught['image'];
-
-        // construct position
-        if ($caught['position']) $ret[] = $caught['position'];
-
-        if (empty($ret)) return false;
-        return implode(' ', $ret);
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Multiple.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Multiple.php
deleted file mode 100644
index 4d62a40d7f..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Multiple.php
+++ /dev/null
@@ -1,58 +0,0 @@
-<?php
-
-/**
- * Framework class for strings that involve multiple values.
- *
- * Certain CSS properties such as border-width and margin allow multiple
- * lengths to be specified.  This class can take a vanilla border-width
- * definition and multiply it, usually into a max of four.
- *
- * @note Even though the CSS specification isn't clear about it, inherit
- *       can only be used alone: it will never manifest as part of a multi
- *       shorthand declaration.  Thus, this class does not allow inherit.
- */
-class HTMLPurifier_AttrDef_CSS_Multiple extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Instance of component definition to defer validation to.
-     * @todo Make protected
-     */
-    public $single;
-
-    /**
-     * Max number of values allowed.
-     * @todo Make protected
-     */
-    public $max;
-
-    /**
-     * @param $single HTMLPurifier_AttrDef to multiply
-     * @param $max Max number of values allowed (usually four)
-     */
-    public function __construct($single, $max = 4) {
-        $this->single = $single;
-        $this->max = $max;
-    }
-
-    public function validate($string, $config, $context) {
-        $string = $this->parseCDATA($string);
-        if ($string === '') return false;
-        $parts = explode(' ', $string); // parseCDATA replaced \r, \t and \n
-        $length = count($parts);
-        $final = '';
-        for ($i = 0, $num = 0; $i < $length && $num < $this->max; $i++) {
-            if (ctype_space($parts[$i])) continue;
-            $result = $this->single->validate($parts[$i], $config, $context);
-            if ($result !== false) {
-                $final .= $result . ' ';
-                $num++;
-            }
-        }
-        if ($final === '') return false;
-        return rtrim($final);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Number.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Number.php
deleted file mode 100644
index 3f99e12ec2..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Number.php
+++ /dev/null
@@ -1,69 +0,0 @@
-<?php
-
-/**
- * Validates a number as defined by the CSS spec.
- */
-class HTMLPurifier_AttrDef_CSS_Number extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Bool indicating whether or not only positive values allowed.
-     */
-    protected $non_negative = false;
-
-    /**
-     * @param $non_negative Bool indicating whether negatives are forbidden
-     */
-    public function __construct($non_negative = false) {
-        $this->non_negative = $non_negative;
-    }
-
-    /**
-     * @warning Some contexts do not pass $config, $context. These
-     *          variables should not be used without checking HTMLPurifier_Length
-     */
-    public function validate($number, $config, $context) {
-
-        $number = $this->parseCDATA($number);
-
-        if ($number === '') return false;
-        if ($number === '0') return '0';
-
-        $sign = '';
-        switch ($number[0]) {
-            case '-':
-                if ($this->non_negative) return false;
-                $sign = '-';
-            case '+':
-                $number = substr($number, 1);
-        }
-
-        if (ctype_digit($number)) {
-            $number = ltrim($number, '0');
-            return $number ? $sign . $number : '0';
-        }
-
-        // Period is the only non-numeric character allowed
-        if (strpos($number, '.') === false) return false;
-
-        list($left, $right) = explode('.', $number, 2);
-
-        if ($left === '' && $right === '') return false;
-        if ($left !== '' && !ctype_digit($left)) return false;
-
-        $left  = ltrim($left,  '0');
-        $right = rtrim($right, '0');
-
-        if ($right === '') {
-            return $left ? $sign . $left : '0';
-        } elseif (!ctype_digit($right)) {
-            return false;
-        }
-
-        return $sign . $left . '.' . $right;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Percentage.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Percentage.php
deleted file mode 100644
index c34b8fc3c3..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/Percentage.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-
-/**
- * Validates a Percentage as defined by the CSS spec.
- */
-class HTMLPurifier_AttrDef_CSS_Percentage extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Instance of HTMLPurifier_AttrDef_CSS_Number to defer number validation
-     */
-    protected $number_def;
-
-    /**
-     * @param Bool indicating whether to forbid negative values
-     */
-    public function __construct($non_negative = false) {
-        $this->number_def = new HTMLPurifier_AttrDef_CSS_Number($non_negative);
-    }
-
-    public function validate($string, $config, $context) {
-
-        $string = $this->parseCDATA($string);
-
-        if ($string === '') return false;
-        $length = strlen($string);
-        if ($length === 1) return false;
-        if ($string[$length - 1] !== '%') return false;
-
-        $number = substr($string, 0, $length - 1);
-        $number = $this->number_def->validate($number, $config, $context);
-
-        if ($number === false) return false;
-        return "$number%";
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/TextDecoration.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/TextDecoration.php
deleted file mode 100644
index 772c922d80..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/TextDecoration.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-
-/**
- * Validates the value for the CSS property text-decoration
- * @note This class could be generalized into a version that acts sort of
- *       like Enum except you can compound the allowed values.
- */
-class HTMLPurifier_AttrDef_CSS_TextDecoration extends HTMLPurifier_AttrDef
-{
-
-    public function validate($string, $config, $context) {
-
-        static $allowed_values = array(
-            'line-through' => true,
-            'overline' => true,
-            'underline' => true,
-        );
-
-        $string = strtolower($this->parseCDATA($string));
-
-        if ($string === 'none') return $string;
-
-        $parts = explode(' ', $string);
-        $final = '';
-        foreach ($parts as $part) {
-            if (isset($allowed_values[$part])) {
-                $final .= $part . ' ';
-            }
-        }
-        $final = rtrim($final);
-        if ($final === '') return false;
-        return $final;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/URI.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/URI.php
deleted file mode 100644
index 435d7930bb..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/CSS/URI.php
+++ /dev/null
@@ -1,56 +0,0 @@
-<?php
-
-/**
- * Validates a URI in CSS syntax, which uses url('http://example.com')
- * @note While theoretically speaking a URI in a CSS document could
- *       be non-embedded, as of CSS2 there is no such usage so we're
- *       generalizing it. This may need to be changed in the future.
- * @warning Since HTMLPurifier_AttrDef_CSS blindly uses semicolons as
- *          the separator, you cannot put a literal semicolon in
- *          in the URI. Try percent encoding it, in that case.
- */
-class HTMLPurifier_AttrDef_CSS_URI extends HTMLPurifier_AttrDef_URI
-{
-
-    public function __construct() {
-        parent::__construct(true); // always embedded
-    }
-
-    public function validate($uri_string, $config, $context) {
-        // parse the URI out of the string and then pass it onto
-        // the parent object
-
-        $uri_string = $this->parseCDATA($uri_string);
-        if (strpos($uri_string, 'url(') !== 0) return false;
-        $uri_string = substr($uri_string, 4);
-        $new_length = strlen($uri_string) - 1;
-        if ($uri_string[$new_length] != ')') return false;
-        $uri = trim(substr($uri_string, 0, $new_length));
-
-        if (!empty($uri) && ($uri[0] == "'" || $uri[0] == '"')) {
-            $quote = $uri[0];
-            $new_length = strlen($uri) - 1;
-            if ($uri[$new_length] !== $quote) return false;
-            $uri = substr($uri, 1, $new_length - 1);
-        }
-
-        $keys   = array(  '(',   ')',   ',',   ' ',   '"',   "'");
-        $values = array('\\(', '\\)', '\\,', '\\ ', '\\"', "\\'");
-        $uri = str_replace($values, $keys, $uri);
-
-        $result = parent::validate($uri, $config, $context);
-
-        if ($result === false) return false;
-
-        // escape necessary characters according to CSS spec
-        // except for the comma, none of these should appear in the
-        // URI at all
-        $result = str_replace($keys, $values, $result);
-
-        return "url($result)";
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Enum.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Enum.php
deleted file mode 100644
index 5d603ebcc6..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Enum.php
+++ /dev/null
@@ -1,65 +0,0 @@
-<?php
-
-// Enum = Enumerated
-/**
- * Validates a keyword against a list of valid values.
- * @warning The case-insensitive compare of this function uses PHP's
- *          built-in strtolower and ctype_lower functions, which may
- *          cause problems with international comparisons
- */
-class HTMLPurifier_AttrDef_Enum extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Lookup table of valid values.
-     * @todo Make protected
-     */
-    public $valid_values   = array();
-
-    /**
-     * Bool indicating whether or not enumeration is case sensitive.
-     * @note In general this is always case insensitive.
-     */
-    protected $case_sensitive = false; // values according to W3C spec
-
-    /**
-     * @param $valid_values List of valid values
-     * @param $case_sensitive Bool indicating whether or not case sensitive
-     */
-    public function __construct(
-        $valid_values = array(), $case_sensitive = false
-    ) {
-        $this->valid_values = array_flip($valid_values);
-        $this->case_sensitive = $case_sensitive;
-    }
-
-    public function validate($string, $config, $context) {
-        $string = trim($string);
-        if (!$this->case_sensitive) {
-            // we may want to do full case-insensitive libraries
-            $string = ctype_lower($string) ? $string : strtolower($string);
-        }
-        $result = isset($this->valid_values[$string]);
-
-        return $result ? $string : false;
-    }
-
-    /**
-     * @param $string In form of comma-delimited list of case-insensitive
-     *      valid values. Example: "foo,bar,baz". Prepend "s:" to make
-     *      case sensitive
-     */
-    public function make($string) {
-        if (strlen($string) > 2 && $string[0] == 's' && $string[1] == ':') {
-            $string = substr($string, 2);
-            $sensitive = true;
-        } else {
-            $sensitive = false;
-        }
-        $values = explode(',', $string);
-        return new HTMLPurifier_AttrDef_Enum($values, $sensitive);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Bool.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Bool.php
deleted file mode 100644
index e06987eb8d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Bool.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-
-/**
- * Validates a boolean attribute
- */
-class HTMLPurifier_AttrDef_HTML_Bool extends HTMLPurifier_AttrDef
-{
-
-    protected $name;
-    public $minimized = true;
-
-    public function __construct($name = false) {$this->name = $name;}
-
-    public function validate($string, $config, $context) {
-        if (empty($string)) return false;
-        return $this->name;
-    }
-
-    /**
-     * @param $string Name of attribute
-     */
-    public function make($string) {
-        return new HTMLPurifier_AttrDef_HTML_Bool($string);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Class.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Class.php
deleted file mode 100644
index 370068d975..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Class.php
+++ /dev/null
@@ -1,34 +0,0 @@
-<?php
-
-/**
- * Implements special behavior for class attribute (normally NMTOKENS)
- */
-class HTMLPurifier_AttrDef_HTML_Class extends HTMLPurifier_AttrDef_HTML_Nmtokens
-{
-    protected function split($string, $config, $context) {
-        // really, this twiddle should be lazy loaded
-        $name = $config->getDefinition('HTML')->doctype->name;
-        if ($name == "XHTML 1.1" || $name == "XHTML 2.0") {
-            return parent::split($string, $config, $context);
-        } else {
-            return preg_split('/\s+/', $string);
-        }
-    }
-    protected function filter($tokens, $config, $context) {
-        $allowed = $config->get('Attr.AllowedClasses');
-        $forbidden = $config->get('Attr.ForbiddenClasses');
-        $ret = array();
-        foreach ($tokens as $token) {
-            if (
-                ($allowed === null || isset($allowed[$token])) &&
-                !isset($forbidden[$token]) &&
-                // We need this O(n) check because of PHP's array
-                // implementation that casts -0 to 0.
-                !in_array($token, $ret, true)
-            ) {
-                $ret[] = $token;
-            }
-        }
-        return $ret;
-    }
-}
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Color.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Color.php
deleted file mode 100644
index d01e20454e..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Color.php
+++ /dev/null
@@ -1,32 +0,0 @@
-<?php
-
-/**
- * Validates a color according to the HTML spec.
- */
-class HTMLPurifier_AttrDef_HTML_Color extends HTMLPurifier_AttrDef
-{
-
-    public function validate($string, $config, $context) {
-
-        static $colors = null;
-        if ($colors === null) $colors = $config->get('Core.ColorKeywords');
-
-        $string = trim($string);
-
-        if (empty($string)) return false;
-        if (isset($colors[$string])) return $colors[$string];
-        if ($string[0] === '#') $hex = substr($string, 1);
-        else $hex = $string;
-
-        $length = strlen($hex);
-        if ($length !== 3 && $length !== 6) return false;
-        if (!ctype_xdigit($hex)) return false;
-        if ($length === 3) $hex = $hex[0].$hex[0].$hex[1].$hex[1].$hex[2].$hex[2];
-
-        return "#$hex";
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/FrameTarget.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/FrameTarget.php
deleted file mode 100644
index ae6ea7c01d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/FrameTarget.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-/**
- * Special-case enum attribute definition that lazy loads allowed frame targets
- */
-class HTMLPurifier_AttrDef_HTML_FrameTarget extends HTMLPurifier_AttrDef_Enum
-{
-
-    public $valid_values = false; // uninitialized value
-    protected $case_sensitive = false;
-
-    public function __construct() {}
-
-    public function validate($string, $config, $context) {
-        if ($this->valid_values === false) $this->valid_values = $config->get('Attr.AllowedFrameTargets');
-        return parent::validate($string, $config, $context);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/ID.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/ID.php
deleted file mode 100644
index 81d03762de..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/ID.php
+++ /dev/null
@@ -1,70 +0,0 @@
-<?php
-
-/**
- * Validates the HTML attribute ID.
- * @warning Even though this is the id processor, it
- *          will ignore the directive Attr:IDBlacklist, since it will only
- *          go according to the ID accumulator. Since the accumulator is
- *          automatically generated, it will have already absorbed the
- *          blacklist. If you're hacking around, make sure you use load()!
- */
-
-class HTMLPurifier_AttrDef_HTML_ID extends HTMLPurifier_AttrDef
-{
-
-    // ref functionality disabled, since we also have to verify
-    // whether or not the ID it refers to exists
-
-    public function validate($id, $config, $context) {
-
-        if (!$config->get('Attr.EnableID')) return false;
-
-        $id = trim($id); // trim it first
-
-        if ($id === '') return false;
-
-        $prefix = $config->get('Attr.IDPrefix');
-        if ($prefix !== '') {
-            $prefix .= $config->get('Attr.IDPrefixLocal');
-            // prevent re-appending the prefix
-            if (strpos($id, $prefix) !== 0) $id = $prefix . $id;
-        } elseif ($config->get('Attr.IDPrefixLocal') !== '') {
-            trigger_error('%Attr.IDPrefixLocal cannot be used unless '.
-                '%Attr.IDPrefix is set', E_USER_WARNING);
-        }
-
-        //if (!$this->ref) {
-            $id_accumulator =& $context->get('IDAccumulator');
-            if (isset($id_accumulator->ids[$id])) return false;
-        //}
-
-        // we purposely avoid using regex, hopefully this is faster
-
-        if (ctype_alpha($id)) {
-            $result = true;
-        } else {
-            if (!ctype_alpha(@$id[0])) return false;
-            $trim = trim( // primitive style of regexps, I suppose
-                $id,
-                'A..Za..z0..9:-._'
-              );
-            $result = ($trim === '');
-        }
-
-        $regexp = $config->get('Attr.IDBlacklistRegexp');
-        if ($regexp && preg_match($regexp, $id)) {
-            return false;
-        }
-
-        if (/*!$this->ref && */$result) $id_accumulator->add($id);
-
-        // if no change was made to the ID, return the result
-        // else, return the new id if stripping whitespace made it
-        //     valid, or return false.
-        return $result ? $id : false;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Length.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Length.php
deleted file mode 100644
index a242f9c238..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Length.php
+++ /dev/null
@@ -1,41 +0,0 @@
-<?php
-
-/**
- * Validates the HTML type length (not to be confused with CSS's length).
- *
- * This accepts integer pixels or percentages as lengths for certain
- * HTML attributes.
- */
-
-class HTMLPurifier_AttrDef_HTML_Length extends HTMLPurifier_AttrDef_HTML_Pixels
-{
-
-    public function validate($string, $config, $context) {
-
-        $string = trim($string);
-        if ($string === '') return false;
-
-        $parent_result = parent::validate($string, $config, $context);
-        if ($parent_result !== false) return $parent_result;
-
-        $length = strlen($string);
-        $last_char = $string[$length - 1];
-
-        if ($last_char !== '%') return false;
-
-        $points = substr($string, 0, $length - 1);
-
-        if (!is_numeric($points)) return false;
-
-        $points = (int) $points;
-
-        if ($points < 0) return '0%';
-        if ($points > 100) return '100%';
-
-        return ((string) $points) . '%';
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/LinkTypes.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/LinkTypes.php
deleted file mode 100644
index 76d25ed088..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/LinkTypes.php
+++ /dev/null
@@ -1,53 +0,0 @@
-<?php
-
-/**
- * Validates a rel/rev link attribute against a directive of allowed values
- * @note We cannot use Enum because link types allow multiple
- *       values.
- * @note Assumes link types are ASCII text
- */
-class HTMLPurifier_AttrDef_HTML_LinkTypes extends HTMLPurifier_AttrDef
-{
-
-    /** Name config attribute to pull. */
-    protected $name;
-
-    public function __construct($name) {
-        $configLookup = array(
-            'rel' => 'AllowedRel',
-            'rev' => 'AllowedRev'
-        );
-        if (!isset($configLookup[$name])) {
-            trigger_error('Unrecognized attribute name for link '.
-                'relationship.', E_USER_ERROR);
-            return;
-        }
-        $this->name = $configLookup[$name];
-    }
-
-    public function validate($string, $config, $context) {
-
-        $allowed = $config->get('Attr.' . $this->name);
-        if (empty($allowed)) return false;
-
-        $string = $this->parseCDATA($string);
-        $parts = explode(' ', $string);
-
-        // lookup to prevent duplicates
-        $ret_lookup = array();
-        foreach ($parts as $part) {
-            $part = strtolower(trim($part));
-            if (!isset($allowed[$part])) continue;
-            $ret_lookup[$part] = true;
-        }
-
-        if (empty($ret_lookup)) return false;
-        $string = implode(' ', array_keys($ret_lookup));
-
-        return $string;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/MultiLength.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/MultiLength.php
deleted file mode 100644
index c72fc76e4d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/MultiLength.php
+++ /dev/null
@@ -1,41 +0,0 @@
-<?php
-
-/**
- * Validates a MultiLength as defined by the HTML spec.
- *
- * A multilength is either a integer (pixel count), a percentage, or
- * a relative number.
- */
-class HTMLPurifier_AttrDef_HTML_MultiLength extends HTMLPurifier_AttrDef_HTML_Length
-{
-
-    public function validate($string, $config, $context) {
-
-        $string = trim($string);
-        if ($string === '') return false;
-
-        $parent_result = parent::validate($string, $config, $context);
-        if ($parent_result !== false) return $parent_result;
-
-        $length = strlen($string);
-        $last_char = $string[$length - 1];
-
-        if ($last_char !== '*') return false;
-
-        $int = substr($string, 0, $length - 1);
-
-        if ($int == '') return '*';
-        if (!is_numeric($int)) return false;
-
-        $int = (int) $int;
-
-        if ($int < 0) return false;
-        if ($int == 0) return '0';
-        if ($int == 1) return '*';
-        return ((string) $int) . '*';
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Nmtokens.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Nmtokens.php
deleted file mode 100644
index aa34120bd2..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Nmtokens.php
+++ /dev/null
@@ -1,52 +0,0 @@
-<?php
-
-/**
- * Validates contents based on NMTOKENS attribute type.
- */
-class HTMLPurifier_AttrDef_HTML_Nmtokens extends HTMLPurifier_AttrDef
-{
-
-    public function validate($string, $config, $context) {
-
-        $string = trim($string);
-
-        // early abort: '' and '0' (strings that convert to false) are invalid
-        if (!$string) return false;
-
-        $tokens = $this->split($string, $config, $context);
-        $tokens = $this->filter($tokens, $config, $context);
-        if (empty($tokens)) return false;
-        return implode(' ', $tokens);
-
-    }
-
-    /**
-     * Splits a space separated list of tokens into its constituent parts.
-     */
-    protected function split($string, $config, $context) {
-        // OPTIMIZABLE!
-        // do the preg_match, capture all subpatterns for reformulation
-
-        // we don't support U+00A1 and up codepoints or
-        // escaping because I don't know how to do that with regexps
-        // and plus it would complicate optimization efforts (you never
-        // see that anyway).
-        $pattern = '/(?:(?<=\s)|\A)'. // look behind for space or string start
-                   '((?:--|-?[A-Za-z_])[A-Za-z_\-0-9]*)'.
-                   '(?:(?=\s)|\z)/'; // look ahead for space or string end
-        preg_match_all($pattern, $string, $matches);
-        return $matches[1];
-    }
-
-    /**
-     * Template method for removing certain tokens based on arbitrary criteria.
-     * @note If we wanted to be really functional, we'd do an array_filter
-     *       with a callback. But... we're not.
-     */
-    protected function filter($tokens, $config, $context) {
-        return $tokens;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Pixels.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Pixels.php
deleted file mode 100644
index 4cb2c1b857..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/HTML/Pixels.php
+++ /dev/null
@@ -1,48 +0,0 @@
-<?php
-
-/**
- * Validates an integer representation of pixels according to the HTML spec.
- */
-class HTMLPurifier_AttrDef_HTML_Pixels extends HTMLPurifier_AttrDef
-{
-
-    protected $max;
-
-    public function __construct($max = null) {
-        $this->max = $max;
-    }
-
-    public function validate($string, $config, $context) {
-
-        $string = trim($string);
-        if ($string === '0') return $string;
-        if ($string === '')  return false;
-        $length = strlen($string);
-        if (substr($string, $length - 2) == 'px') {
-            $string = substr($string, 0, $length - 2);
-        }
-        if (!is_numeric($string)) return false;
-        $int = (int) $string;
-
-        if ($int < 0) return '0';
-
-        // upper-bound value, extremely high values can
-        // crash operating systems, see <http://ha.ckers.org/imagecrash.html>
-        // WARNING, above link WILL crash you if you're using Windows
-
-        if ($this->max !== null && $int > $this->max) return (string) $this->max;
-
-        return (string) $int;
-
-    }
-
-    public function make($string) {
-        if ($string === '') $max = null;
-        else $max = (int) $string;
-        $class = get_class($this);
-        return new $class($max);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Integer.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Integer.php
deleted file mode 100644
index d59738d2a2..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Integer.php
+++ /dev/null
@@ -1,73 +0,0 @@
-<?php
-
-/**
- * Validates an integer.
- * @note While this class was modeled off the CSS definition, no currently
- *       allowed CSS uses this type.  The properties that do are: widows,
- *       orphans, z-index, counter-increment, counter-reset.  Some of the
- *       HTML attributes, however, find use for a non-negative version of this.
- */
-class HTMLPurifier_AttrDef_Integer extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Bool indicating whether or not negative values are allowed
-     */
-    protected $negative = true;
-
-    /**
-     * Bool indicating whether or not zero is allowed
-     */
-    protected $zero = true;
-
-    /**
-     * Bool indicating whether or not positive values are allowed
-     */
-    protected $positive = true;
-
-    /**
-     * @param $negative Bool indicating whether or not negative values are allowed
-     * @param $zero Bool indicating whether or not zero is allowed
-     * @param $positive Bool indicating whether or not positive values are allowed
-     */
-    public function __construct(
-        $negative = true, $zero = true, $positive = true
-    ) {
-        $this->negative = $negative;
-        $this->zero     = $zero;
-        $this->positive = $positive;
-    }
-
-    public function validate($integer, $config, $context) {
-
-        $integer = $this->parseCDATA($integer);
-        if ($integer === '') return false;
-
-        // we could possibly simply typecast it to integer, but there are
-        // certain fringe cases that must not return an integer.
-
-        // clip leading sign
-        if ( $this->negative && $integer[0] === '-' ) {
-            $digits = substr($integer, 1);
-            if ($digits === '0') $integer = '0'; // rm minus sign for zero
-        } elseif( $this->positive && $integer[0] === '+' ) {
-            $digits = $integer = substr($integer, 1); // rm unnecessary plus
-        } else {
-            $digits = $integer;
-        }
-
-        // test if it's numeric
-        if (!ctype_digit($digits)) return false;
-
-        // perform scope tests
-        if (!$this->zero     && $integer == 0) return false;
-        if (!$this->positive && $integer > 0) return false;
-        if (!$this->negative && $integer < 0) return false;
-
-        return $integer;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Lang.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Lang.php
deleted file mode 100644
index 10e6da56db..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Lang.php
+++ /dev/null
@@ -1,73 +0,0 @@
-<?php
-
-/**
- * Validates the HTML attribute lang, effectively a language code.
- * @note Built according to RFC 3066, which obsoleted RFC 1766
- */
-class HTMLPurifier_AttrDef_Lang extends HTMLPurifier_AttrDef
-{
-
-    public function validate($string, $config, $context) {
-
-        $string = trim($string);
-        if (!$string) return false;
-
-        $subtags = explode('-', $string);
-        $num_subtags = count($subtags);
-
-        if ($num_subtags == 0) return false; // sanity check
-
-        // process primary subtag : $subtags[0]
-        $length = strlen($subtags[0]);
-        switch ($length) {
-            case 0:
-                return false;
-            case 1:
-                if (! ($subtags[0] == 'x' || $subtags[0] == 'i') ) {
-                    return false;
-                }
-                break;
-            case 2:
-            case 3:
-                if (! ctype_alpha($subtags[0]) ) {
-                    return false;
-                } elseif (! ctype_lower($subtags[0]) ) {
-                    $subtags[0] = strtolower($subtags[0]);
-                }
-                break;
-            default:
-                return false;
-        }
-
-        $new_string = $subtags[0];
-        if ($num_subtags == 1) return $new_string;
-
-        // process second subtag : $subtags[1]
-        $length = strlen($subtags[1]);
-        if ($length == 0 || ($length == 1 && $subtags[1] != 'x') || $length > 8 || !ctype_alnum($subtags[1])) {
-            return $new_string;
-        }
-        if (!ctype_lower($subtags[1])) $subtags[1] = strtolower($subtags[1]);
-
-        $new_string .= '-' . $subtags[1];
-        if ($num_subtags == 2) return $new_string;
-
-        // process all other subtags, index 2 and up
-        for ($i = 2; $i < $num_subtags; $i++) {
-            $length = strlen($subtags[$i]);
-            if ($length == 0 || $length > 8 || !ctype_alnum($subtags[$i])) {
-                return $new_string;
-            }
-            if (!ctype_lower($subtags[$i])) {
-                $subtags[$i] = strtolower($subtags[$i]);
-            }
-            $new_string .= '-' . $subtags[$i];
-        }
-
-        return $new_string;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Switch.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Switch.php
deleted file mode 100644
index c9e3ed193e..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Switch.php
+++ /dev/null
@@ -1,34 +0,0 @@
-<?php
-
-/**
- * Decorator that, depending on a token, switches between two definitions.
- */
-class HTMLPurifier_AttrDef_Switch
-{
-
-    protected $tag;
-    protected $withTag, $withoutTag;
-
-    /**
-     * @param string $tag Tag name to switch upon
-     * @param HTMLPurifier_AttrDef $with_tag Call if token matches tag
-     * @param HTMLPurifier_AttrDef $without_tag Call if token doesn't match, or there is no token
-     */
-    public function __construct($tag, $with_tag, $without_tag) {
-        $this->tag = $tag;
-        $this->withTag = $with_tag;
-        $this->withoutTag = $without_tag;
-    }
-
-    public function validate($string, $config, $context) {
-        $token = $context->get('CurrentToken', true);
-        if (!$token || $token->name !== $this->tag) {
-            return $this->withoutTag->validate($string, $config, $context);
-        } else {
-            return $this->withTag->validate($string, $config, $context);
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Text.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Text.php
deleted file mode 100644
index c6216cc531..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/Text.php
+++ /dev/null
@@ -1,15 +0,0 @@
-<?php
-
-/**
- * Validates arbitrary text according to the HTML spec.
- */
-class HTMLPurifier_AttrDef_Text extends HTMLPurifier_AttrDef
-{
-
-    public function validate($string, $config, $context) {
-        return $this->parseCDATA($string);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI.php
deleted file mode 100644
index 01a6d83e95..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI.php
+++ /dev/null
@@ -1,77 +0,0 @@
-<?php
-
-/**
- * Validates a URI as defined by RFC 3986.
- * @note Scheme-specific mechanics deferred to HTMLPurifier_URIScheme
- */
-class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
-{
-
-    protected $parser;
-    protected $embedsResource;
-
-    /**
-     * @param $embeds_resource_resource Does the URI here result in an extra HTTP request?
-     */
-    public function __construct($embeds_resource = false) {
-        $this->parser = new HTMLPurifier_URIParser();
-        $this->embedsResource = (bool) $embeds_resource;
-    }
-
-    public function make($string) {
-        $embeds = (bool) $string;
-        return new HTMLPurifier_AttrDef_URI($embeds);
-    }
-
-    public function validate($uri, $config, $context) {
-
-        if ($config->get('URI.Disable')) return false;
-
-        $uri = $this->parseCDATA($uri);
-
-        // parse the URI
-        $uri = $this->parser->parse($uri);
-        if ($uri === false) return false;
-
-        // add embedded flag to context for validators
-        $context->register('EmbeddedURI', $this->embedsResource);
-
-        $ok = false;
-        do {
-
-            // generic validation
-            $result = $uri->validate($config, $context);
-            if (!$result) break;
-
-            // chained filtering
-            $uri_def = $config->getDefinition('URI');
-            $result = $uri_def->filter($uri, $config, $context);
-            if (!$result) break;
-
-            // scheme-specific validation
-            $scheme_obj = $uri->getSchemeObj($config, $context);
-            if (!$scheme_obj) break;
-            if ($this->embedsResource && !$scheme_obj->browsable) break;
-            $result = $scheme_obj->validate($uri, $config, $context);
-            if (!$result) break;
-
-            // Post chained filtering
-            $result = $uri_def->postFilter($uri, $config, $context);
-            if (!$result) break;
-
-            // survived gauntlet
-            $ok = true;
-
-        } while (false);
-
-        $context->destroy('EmbeddedURI');
-        if (!$ok) return false;
-
-        // back to string
-        return $uri->toString();
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/Email.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/Email.php
deleted file mode 100644
index bfee9d166c..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/Email.php
+++ /dev/null
@@ -1,17 +0,0 @@
-<?php
-
-abstract class HTMLPurifier_AttrDef_URI_Email extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Unpacks a mailbox into its display-name and address
-     */
-    function unpack($string) {
-        // needs to be implemented
-    }
-
-}
-
-// sub-implementations
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php
deleted file mode 100644
index 94c715ab43..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-/**
- * Primitive email validation class based on the regexp found at
- * http://www.regular-expressions.info/email.html
- */
-class HTMLPurifier_AttrDef_URI_Email_SimpleCheck extends HTMLPurifier_AttrDef_URI_Email
-{
-
-    public function validate($string, $config, $context) {
-        // no support for named mailboxes i.e. "Bob <bob@example.com>"
-        // that needs more percent encoding to be done
-        if ($string == '') return false;
-        $string = trim($string);
-        $result = preg_match('/^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i', $string);
-        return $result ? $string : false;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/Host.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/Host.php
deleted file mode 100644
index 2156c10c66..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/Host.php
+++ /dev/null
@@ -1,62 +0,0 @@
-<?php
-
-/**
- * Validates a host according to the IPv4, IPv6 and DNS (future) specifications.
- */
-class HTMLPurifier_AttrDef_URI_Host extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * Instance of HTMLPurifier_AttrDef_URI_IPv4 sub-validator
-     */
-    protected $ipv4;
-
-    /**
-     * Instance of HTMLPurifier_AttrDef_URI_IPv6 sub-validator
-     */
-    protected $ipv6;
-
-    public function __construct() {
-        $this->ipv4 = new HTMLPurifier_AttrDef_URI_IPv4();
-        $this->ipv6 = new HTMLPurifier_AttrDef_URI_IPv6();
-    }
-
-    public function validate($string, $config, $context) {
-        $length = strlen($string);
-        if ($string === '') return '';
-        if ($length > 1 && $string[0] === '[' && $string[$length-1] === ']') {
-            //IPv6
-            $ip = substr($string, 1, $length - 2);
-            $valid = $this->ipv6->validate($ip, $config, $context);
-            if ($valid === false) return false;
-            return '['. $valid . ']';
-        }
-
-        // need to do checks on unusual encodings too
-        $ipv4 = $this->ipv4->validate($string, $config, $context);
-        if ($ipv4 !== false) return $ipv4;
-
-        // A regular domain name.
-
-        // This breaks I18N domain names, but we don't have proper IRI support,
-        // so force users to insert Punycode. If there's complaining we'll
-        // try to fix things into an international friendly form.
-
-        // The productions describing this are:
-        $a   = '[a-z]';     // alpha
-        $an  = '[a-z0-9]';  // alphanum
-        $and = '[a-z0-9-]'; // alphanum | "-"
-        // domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
-        $domainlabel   = "$an($and*$an)?";
-        // toplabel    = alpha | alpha *( alphanum | "-" ) alphanum
-        $toplabel      = "$a($and*$an)?";
-        // hostname    = *( domainlabel "." ) toplabel [ "." ]
-        $match = preg_match("/^($domainlabel\.)*$toplabel\.?$/i", $string);
-        if (!$match) return false;
-
-        return $string;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/IPv4.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/IPv4.php
deleted file mode 100644
index ec4cf591b8..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/IPv4.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-/**
- * Validates an IPv4 address
- * @author Feyd @ forums.devnetwork.net (public domain)
- */
-class HTMLPurifier_AttrDef_URI_IPv4 extends HTMLPurifier_AttrDef
-{
-
-    /**
-     * IPv4 regex, protected so that IPv6 can reuse it
-     */
-    protected $ip4;
-
-    public function validate($aIP, $config, $context) {
-
-        if (!$this->ip4) $this->_loadRegex();
-
-        if (preg_match('#^' . $this->ip4 . '$#s', $aIP))
-        {
-                return $aIP;
-        }
-
-        return false;
-
-    }
-
-    /**
-     * Lazy load function to prevent regex from being stuffed in
-     * cache.
-     */
-    protected function _loadRegex() {
-        $oct = '(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]|[0-9])'; // 0-255
-        $this->ip4 = "(?:{$oct}\\.{$oct}\\.{$oct}\\.{$oct})";
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/IPv6.php b/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/IPv6.php
deleted file mode 100644
index 9454e9be50..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrDef/URI/IPv6.php
+++ /dev/null
@@ -1,99 +0,0 @@
-<?php
-
-/**
- * Validates an IPv6 address.
- * @author Feyd @ forums.devnetwork.net (public domain)
- * @note This function requires brackets to have been removed from address
- *       in URI.
- */
-class HTMLPurifier_AttrDef_URI_IPv6 extends HTMLPurifier_AttrDef_URI_IPv4
-{
-
-    public function validate($aIP, $config, $context) {
-
-        if (!$this->ip4) $this->_loadRegex();
-
-        $original = $aIP;
-
-        $hex = '[0-9a-fA-F]';
-        $blk = '(?:' . $hex . '{1,4})';
-        $pre = '(?:/(?:12[0-8]|1[0-1][0-9]|[1-9][0-9]|[0-9]))';   // /0 - /128
-
-        //      prefix check
-        if (strpos($aIP, '/') !== false)
-        {
-                if (preg_match('#' . $pre . '$#s', $aIP, $find))
-                {
-                        $aIP = substr($aIP, 0, 0-strlen($find[0]));
-                        unset($find);
-                }
-                else
-                {
-                        return false;
-                }
-        }
-
-        //      IPv4-compatiblity check
-        if (preg_match('#(?<=:'.')' . $this->ip4 . '$#s', $aIP, $find))
-        {
-                $aIP = substr($aIP, 0, 0-strlen($find[0]));
-                $ip = explode('.', $find[0]);
-                $ip = array_map('dechex', $ip);
-                $aIP .= $ip[0] . $ip[1] . ':' . $ip[2] . $ip[3];
-                unset($find, $ip);
-        }
-
-        //      compression check
-        $aIP = explode('::', $aIP);
-        $c = count($aIP);
-        if ($c > 2)
-        {
-                return false;
-        }
-        elseif ($c == 2)
-        {
-                list($first, $second) = $aIP;
-                $first = explode(':', $first);
-                $second = explode(':', $second);
-
-                if (count($first) + count($second) > 8)
-                {
-                        return false;
-                }
-
-                while(count($first) < 8)
-                {
-                        array_push($first, '0');
-                }
-
-                array_splice($first, 8 - count($second), 8, $second);
-                $aIP = $first;
-                unset($first,$second);
-        }
-        else
-        {
-                $aIP = explode(':', $aIP[0]);
-        }
-        $c = count($aIP);
-
-        if ($c != 8)
-        {
-                return false;
-        }
-
-        //      All the pieces should be 16-bit hex strings. Are they?
-        foreach ($aIP as $piece)
-        {
-                if (!preg_match('#^[0-9a-fA-F]{4}$#s', sprintf('%04s', $piece)))
-                {
-                        return false;
-                }
-        }
-
-        return $original;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform.php
deleted file mode 100644
index e61d3e01b6..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform.php
+++ /dev/null
@@ -1,56 +0,0 @@
-<?php
-
-/**
- * Processes an entire attribute array for corrections needing multiple values.
- *
- * Occasionally, a certain attribute will need to be removed and popped onto
- * another value.  Instead of creating a complex return syntax for
- * HTMLPurifier_AttrDef, we just pass the whole attribute array to a
- * specialized object and have that do the special work.  That is the
- * family of HTMLPurifier_AttrTransform.
- *
- * An attribute transformation can be assigned to run before or after
- * HTMLPurifier_AttrDef validation.  See HTMLPurifier_HTMLDefinition for
- * more details.
- */
-
-abstract class HTMLPurifier_AttrTransform
-{
-
-    /**
-     * Abstract: makes changes to the attributes dependent on multiple values.
-     *
-     * @param $attr Assoc array of attributes, usually from
-     *              HTMLPurifier_Token_Tag::$attr
-     * @param $config Mandatory HTMLPurifier_Config object.
-     * @param $context Mandatory HTMLPurifier_Context object
-     * @returns Processed attribute array.
-     */
-    abstract public function transform($attr, $config, $context);
-
-    /**
-     * Prepends CSS properties to the style attribute, creating the
-     * attribute if it doesn't exist.
-     * @param $attr Attribute array to process (passed by reference)
-     * @param $css CSS to prepend
-     */
-    public function prependCSS(&$attr, $css) {
-        $attr['style'] = isset($attr['style']) ? $attr['style'] : '';
-        $attr['style'] = $css . $attr['style'];
-    }
-
-    /**
-     * Retrieves and removes an attribute
-     * @param $attr Attribute array to process (passed by reference)
-     * @param $key Key of attribute to confiscate
-     */
-    public function confiscateAttr(&$attr, $key) {
-        if (!isset($attr[$key])) return null;
-        $value = $attr[$key];
-        unset($attr[$key]);
-        return $value;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Background.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Background.php
deleted file mode 100644
index 0e1ff24a3e..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Background.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-/**
- * Pre-transform that changes proprietary background attribute to CSS.
- */
-class HTMLPurifier_AttrTransform_Background extends HTMLPurifier_AttrTransform {
-
-    public function transform($attr, $config, $context) {
-
-        if (!isset($attr['background'])) return $attr;
-
-        $background = $this->confiscateAttr($attr, 'background');
-        // some validation should happen here
-
-        $this->prependCSS($attr, "background-image:url($background);");
-
-        return $attr;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/BdoDir.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/BdoDir.php
deleted file mode 100644
index 4d1a05665e..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/BdoDir.php
+++ /dev/null
@@ -1,19 +0,0 @@
-<?php
-
-// this MUST be placed in post, as it assumes that any value in dir is valid
-
-/**
- * Post-trasnform that ensures that bdo tags have the dir attribute set.
- */
-class HTMLPurifier_AttrTransform_BdoDir extends HTMLPurifier_AttrTransform
-{
-
-    public function transform($attr, $config, $context) {
-        if (isset($attr['dir'])) return $attr;
-        $attr['dir'] = $config->get('Attr.DefaultTextDir');
-        return $attr;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/BgColor.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/BgColor.php
deleted file mode 100644
index ad3916bb96..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/BgColor.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-/**
- * Pre-transform that changes deprecated bgcolor attribute to CSS.
- */
-class HTMLPurifier_AttrTransform_BgColor extends HTMLPurifier_AttrTransform {
-
-    public function transform($attr, $config, $context) {
-
-        if (!isset($attr['bgcolor'])) return $attr;
-
-        $bgcolor = $this->confiscateAttr($attr, 'bgcolor');
-        // some validation should happen here
-
-        $this->prependCSS($attr, "background-color:$bgcolor;");
-
-        return $attr;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/BoolToCSS.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/BoolToCSS.php
deleted file mode 100644
index 51159b6715..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/BoolToCSS.php
+++ /dev/null
@@ -1,36 +0,0 @@
-<?php
-
-/**
- * Pre-transform that changes converts a boolean attribute to fixed CSS
- */
-class HTMLPurifier_AttrTransform_BoolToCSS extends HTMLPurifier_AttrTransform {
-
-    /**
-     * Name of boolean attribute that is trigger
-     */
-    protected $attr;
-
-    /**
-     * CSS declarations to add to style, needs trailing semicolon
-     */
-    protected $css;
-
-    /**
-     * @param $attr string attribute name to convert from
-     * @param $css string CSS declarations to add to style (needs semicolon)
-     */
-    public function __construct($attr, $css) {
-        $this->attr = $attr;
-        $this->css  = $css;
-    }
-
-    public function transform($attr, $config, $context) {
-        if (!isset($attr[$this->attr])) return $attr;
-        unset($attr[$this->attr]);
-        $this->prependCSS($attr, $this->css);
-        return $attr;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Border.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Border.php
deleted file mode 100644
index 476b0b079b..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Border.php
+++ /dev/null
@@ -1,18 +0,0 @@
-<?php
-
-/**
- * Pre-transform that changes deprecated border attribute to CSS.
- */
-class HTMLPurifier_AttrTransform_Border extends HTMLPurifier_AttrTransform {
-
-    public function transform($attr, $config, $context) {
-        if (!isset($attr['border'])) return $attr;
-        $border_width = $this->confiscateAttr($attr, 'border');
-        // some validation should happen here
-        $this->prependCSS($attr, "border:{$border_width}px solid;");
-        return $attr;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/EnumToCSS.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/EnumToCSS.php
deleted file mode 100644
index 2a5b4514ab..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/EnumToCSS.php
+++ /dev/null
@@ -1,58 +0,0 @@
-<?php
-
-/**
- * Generic pre-transform that converts an attribute with a fixed number of
- * values (enumerated) to CSS.
- */
-class HTMLPurifier_AttrTransform_EnumToCSS extends HTMLPurifier_AttrTransform {
-
-    /**
-     * Name of attribute to transform from
-     */
-    protected $attr;
-
-    /**
-     * Lookup array of attribute values to CSS
-     */
-    protected $enumToCSS = array();
-
-    /**
-     * Case sensitivity of the matching
-     * @warning Currently can only be guaranteed to work with ASCII
-     *          values.
-     */
-    protected $caseSensitive = false;
-
-    /**
-     * @param $attr String attribute name to transform from
-     * @param $enumToCSS Lookup array of attribute values to CSS
-     * @param $case_sensitive Boolean case sensitivity indicator, default false
-     */
-    public function __construct($attr, $enum_to_css, $case_sensitive = false) {
-        $this->attr = $attr;
-        $this->enumToCSS = $enum_to_css;
-        $this->caseSensitive = (bool) $case_sensitive;
-    }
-
-    public function transform($attr, $config, $context) {
-
-        if (!isset($attr[$this->attr])) return $attr;
-
-        $value = trim($attr[$this->attr]);
-        unset($attr[$this->attr]);
-
-        if (!$this->caseSensitive) $value = strtolower($value);
-
-        if (!isset($this->enumToCSS[$value])) {
-            return $attr;
-        }
-
-        $this->prependCSS($attr, $this->enumToCSS[$value]);
-
-        return $attr;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/ImgRequired.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/ImgRequired.php
deleted file mode 100644
index a219479a02..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/ImgRequired.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-
-// must be called POST validation
-
-/**
- * Transform that supplies default values for the src and alt attributes
- * in img tags, as well as prevents the img tag from being removed
- * because of a missing alt tag. This needs to be registered as both
- * a pre and post attribute transform.
- */
-class HTMLPurifier_AttrTransform_ImgRequired extends HTMLPurifier_AttrTransform
-{
-
-    public function transform($attr, $config, $context) {
-
-        $src = true;
-        if (!isset($attr['src'])) {
-            if ($config->get('Core.RemoveInvalidImg')) return $attr;
-            $attr['src'] = $config->get('Attr.DefaultInvalidImage');
-            $src = false;
-        }
-
-        if (!isset($attr['alt'])) {
-            if ($src) {
-                $alt = $config->get('Attr.DefaultImageAlt');
-                if ($alt === null) {
-                    $attr['alt'] = basename($attr['src']);
-                } else {
-                    $attr['alt'] = $alt;
-                }
-            } else {
-                $attr['alt'] = $config->get('Attr.DefaultInvalidImageAlt');
-            }
-        }
-
-        return $attr;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/ImgSpace.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/ImgSpace.php
deleted file mode 100644
index fd84c10c36..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/ImgSpace.php
+++ /dev/null
@@ -1,44 +0,0 @@
-<?php
-
-/**
- * Pre-transform that changes deprecated hspace and vspace attributes to CSS
- */
-class HTMLPurifier_AttrTransform_ImgSpace extends HTMLPurifier_AttrTransform {
-
-    protected $attr;
-    protected $css = array(
-        'hspace' => array('left', 'right'),
-        'vspace' => array('top', 'bottom')
-    );
-
-    public function __construct($attr) {
-        $this->attr = $attr;
-        if (!isset($this->css[$attr])) {
-            trigger_error(htmlspecialchars($attr) . ' is not valid space attribute');
-        }
-    }
-
-    public function transform($attr, $config, $context) {
-
-        if (!isset($attr[$this->attr])) return $attr;
-
-        $width = $this->confiscateAttr($attr, $this->attr);
-        // some validation could happen here
-
-        if (!isset($this->css[$this->attr])) return $attr;
-
-        $style = '';
-        foreach ($this->css[$this->attr] as $suffix) {
-            $property = "margin-$suffix";
-            $style .= "$property:{$width}px;";
-        }
-
-        $this->prependCSS($attr, $style);
-
-        return $attr;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Input.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Input.php
deleted file mode 100644
index 16829552d1..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Input.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-
-/**
- * Performs miscellaneous cross attribute validation and filtering for
- * input elements. This is meant to be a post-transform.
- */
-class HTMLPurifier_AttrTransform_Input extends HTMLPurifier_AttrTransform {
-
-    protected $pixels;
-
-    public function __construct() {
-        $this->pixels = new HTMLPurifier_AttrDef_HTML_Pixels();
-    }
-
-    public function transform($attr, $config, $context) {
-        if (!isset($attr['type'])) $t = 'text';
-        else $t = strtolower($attr['type']);
-        if (isset($attr['checked']) && $t !== 'radio' && $t !== 'checkbox') {
-            unset($attr['checked']);
-        }
-        if (isset($attr['maxlength']) && $t !== 'text' && $t !== 'password') {
-            unset($attr['maxlength']);
-        }
-        if (isset($attr['size']) && $t !== 'text' && $t !== 'password') {
-            $result = $this->pixels->validate($attr['size'], $config, $context);
-            if ($result === false) unset($attr['size']);
-            else $attr['size'] = $result;
-        }
-        if (isset($attr['src']) && $t !== 'image') {
-            unset($attr['src']);
-        }
-        if (!isset($attr['value']) && ($t === 'radio' || $t === 'checkbox')) {
-            $attr['value'] = '';
-        }
-        return $attr;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Lang.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Lang.php
deleted file mode 100644
index 5869e7f820..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Lang.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-
-/**
- * Post-transform that copies lang's value to xml:lang (and vice-versa)
- * @note Theoretically speaking, this could be a pre-transform, but putting
- *       post is more efficient.
- */
-class HTMLPurifier_AttrTransform_Lang extends HTMLPurifier_AttrTransform
-{
-
-    public function transform($attr, $config, $context) {
-
-        $lang     = isset($attr['lang']) ? $attr['lang'] : false;
-        $xml_lang = isset($attr['xml:lang']) ? $attr['xml:lang'] : false;
-
-        if ($lang !== false && $xml_lang === false) {
-            $attr['xml:lang'] = $lang;
-        } elseif ($xml_lang !== false) {
-            $attr['lang'] = $xml_lang;
-        }
-
-        return $attr;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Length.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Length.php
deleted file mode 100644
index ea2f30473d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Length.php
+++ /dev/null
@@ -1,27 +0,0 @@
-<?php
-
-/**
- * Class for handling width/height length attribute transformations to CSS
- */
-class HTMLPurifier_AttrTransform_Length extends HTMLPurifier_AttrTransform
-{
-
-    protected $name;
-    protected $cssName;
-
-    public function __construct($name, $css_name = null) {
-        $this->name = $name;
-        $this->cssName = $css_name ? $css_name : $name;
-    }
-
-    public function transform($attr, $config, $context) {
-        if (!isset($attr[$this->name])) return $attr;
-        $length = $this->confiscateAttr($attr, $this->name);
-        if(ctype_digit($length)) $length .= 'px';
-        $this->prependCSS($attr, $this->cssName . ":$length;");
-        return $attr;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Name.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Name.php
deleted file mode 100644
index 15315bc735..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Name.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-/**
- * Pre-transform that changes deprecated name attribute to ID if necessary
- */
-class HTMLPurifier_AttrTransform_Name extends HTMLPurifier_AttrTransform
-{
-
-    public function transform($attr, $config, $context) {
-        // Abort early if we're using relaxed definition of name
-        if ($config->get('HTML.Attr.Name.UseCDATA')) return $attr;
-        if (!isset($attr['name'])) return $attr;
-        $id = $this->confiscateAttr($attr, 'name');
-        if ( isset($attr['id']))   return $attr;
-        $attr['id'] = $id;
-        return $attr;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/NameSync.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/NameSync.php
deleted file mode 100644
index a95638c140..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/NameSync.php
+++ /dev/null
@@ -1,27 +0,0 @@
-<?php
-
-/**
- * Post-transform that performs validation to the name attribute; if
- * it is present with an equivalent id attribute, it is passed through;
- * otherwise validation is performed.
- */
-class HTMLPurifier_AttrTransform_NameSync extends HTMLPurifier_AttrTransform
-{
-
-    public function __construct() {
-        $this->idDef = new HTMLPurifier_AttrDef_HTML_ID();
-    }
-
-    public function transform($attr, $config, $context) {
-        if (!isset($attr['name'])) return $attr;
-        $name = $attr['name'];
-        if (isset($attr['id']) && $attr['id'] === $name) return $attr;
-        $result = $this->idDef->validate($name, $config, $context);
-        if ($result === false) unset($attr['name']);
-        else $attr['name'] = $result;
-        return $attr;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/SafeEmbed.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/SafeEmbed.php
deleted file mode 100644
index 4da449981f..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/SafeEmbed.php
+++ /dev/null
@@ -1,15 +0,0 @@
-<?php
-
-class HTMLPurifier_AttrTransform_SafeEmbed extends HTMLPurifier_AttrTransform
-{
-    public $name = "SafeEmbed";
-
-    public function transform($attr, $config, $context) {
-        $attr['allowscriptaccess'] = 'never';
-        $attr['allownetworking'] = 'internal';
-        $attr['type'] = 'application/x-shockwave-flash';
-        return $attr;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/SafeObject.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/SafeObject.php
deleted file mode 100644
index 1ed74898ba..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/SafeObject.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-
-/**
- * Writes default type for all objects. Currently only supports flash.
- */
-class HTMLPurifier_AttrTransform_SafeObject extends HTMLPurifier_AttrTransform
-{
-    public $name = "SafeObject";
-
-    function transform($attr, $config, $context) {
-        if (!isset($attr['type'])) $attr['type'] = 'application/x-shockwave-flash';
-        return $attr;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/SafeParam.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/SafeParam.php
deleted file mode 100644
index 94e8052a9d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/SafeParam.php
+++ /dev/null
@@ -1,50 +0,0 @@
-<?php
-
-/**
- * Validates name/value pairs in param tags to be used in safe objects. This
- * will only allow name values it recognizes, and pre-fill certain attributes
- * with required values.
- *
- * @note
- *      This class only supports Flash. In the future, Quicktime support
- *      may be added.
- *
- * @warning
- *      This class expects an injector to add the necessary parameters tags.
- */
-class HTMLPurifier_AttrTransform_SafeParam extends HTMLPurifier_AttrTransform
-{
-    public $name = "SafeParam";
-    private $uri;
-
-    public function __construct() {
-        $this->uri = new HTMLPurifier_AttrDef_URI(true); // embedded
-    }
-
-    public function transform($attr, $config, $context) {
-        // If we add support for other objects, we'll need to alter the
-        // transforms.
-        switch ($attr['name']) {
-            // application/x-shockwave-flash
-            // Keep this synchronized with Injector/SafeObject.php
-            case 'allowScriptAccess':
-                $attr['value'] = 'never';
-                break;
-            case 'allowNetworking':
-                $attr['value'] = 'internal';
-                break;
-            case 'wmode':
-                $attr['value'] = 'window';
-                break;
-            case 'movie':
-                $attr['value'] = $this->uri->validate($attr['value'], $config, $context);
-                break;
-            // add other cases to support other param name/value pairs
-            default:
-                $attr['name'] = $attr['value'] = null;
-        }
-        return $attr;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/ScriptRequired.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/ScriptRequired.php
deleted file mode 100644
index 4499050a22..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/ScriptRequired.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-
-/**
- * Implements required attribute stipulation for <script>
- */
-class HTMLPurifier_AttrTransform_ScriptRequired extends HTMLPurifier_AttrTransform
-{
-    public function transform($attr, $config, $context) {
-        if (!isset($attr['type'])) {
-            $attr['type'] = 'text/javascript';
-        }
-        return $attr;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Textarea.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Textarea.php
deleted file mode 100644
index 81ac3488ba..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTransform/Textarea.php
+++ /dev/null
@@ -1,18 +0,0 @@
-<?php
-
-/**
- * Sets height/width defaults for <textarea>
- */
-class HTMLPurifier_AttrTransform_Textarea extends HTMLPurifier_AttrTransform
-{
-
-    public function transform($attr, $config, $context) {
-        // Calculated from Firefox
-        if (!isset($attr['cols'])) $attr['cols'] = '22';
-        if (!isset($attr['rows'])) $attr['rows'] = '3';
-        return $attr;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrTypes.php b/extlib/HTMLPurifier/HTMLPurifier/AttrTypes.php
deleted file mode 100644
index fc2ea4e588..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrTypes.php
+++ /dev/null
@@ -1,77 +0,0 @@
-<?php
-
-/**
- * Provides lookup array of attribute types to HTMLPurifier_AttrDef objects
- */
-class HTMLPurifier_AttrTypes
-{
-    /**
-     * Lookup array of attribute string identifiers to concrete implementations
-     */
-    protected $info = array();
-
-    /**
-     * Constructs the info array, supplying default implementations for attribute
-     * types.
-     */
-    public function __construct() {
-        // pseudo-types, must be instantiated via shorthand
-        $this->info['Enum']    = new HTMLPurifier_AttrDef_Enum();
-        $this->info['Bool']    = new HTMLPurifier_AttrDef_HTML_Bool();
-
-        $this->info['CDATA']    = new HTMLPurifier_AttrDef_Text();
-        $this->info['ID']       = new HTMLPurifier_AttrDef_HTML_ID();
-        $this->info['Length']   = new HTMLPurifier_AttrDef_HTML_Length();
-        $this->info['MultiLength'] = new HTMLPurifier_AttrDef_HTML_MultiLength();
-        $this->info['NMTOKENS'] = new HTMLPurifier_AttrDef_HTML_Nmtokens();
-        $this->info['Pixels']   = new HTMLPurifier_AttrDef_HTML_Pixels();
-        $this->info['Text']     = new HTMLPurifier_AttrDef_Text();
-        $this->info['URI']      = new HTMLPurifier_AttrDef_URI();
-        $this->info['LanguageCode'] = new HTMLPurifier_AttrDef_Lang();
-        $this->info['Color']    = new HTMLPurifier_AttrDef_HTML_Color();
-
-        // unimplemented aliases
-        $this->info['ContentType'] = new HTMLPurifier_AttrDef_Text();
-        $this->info['ContentTypes'] = new HTMLPurifier_AttrDef_Text();
-        $this->info['Charsets'] = new HTMLPurifier_AttrDef_Text();
-        $this->info['Character'] = new HTMLPurifier_AttrDef_Text();
-
-        // "proprietary" types
-        $this->info['Class'] = new HTMLPurifier_AttrDef_HTML_Class();
-
-        // number is really a positive integer (one or more digits)
-        // FIXME: ^^ not always, see start and value of list items
-        $this->info['Number']   = new HTMLPurifier_AttrDef_Integer(false, false, true);
-    }
-
-    /**
-     * Retrieves a type
-     * @param $type String type name
-     * @return Object AttrDef for type
-     */
-    public function get($type) {
-
-        // determine if there is any extra info tacked on
-        if (strpos($type, '#') !== false) list($type, $string) = explode('#', $type, 2);
-        else $string = '';
-
-        if (!isset($this->info[$type])) {
-            trigger_error('Cannot retrieve undefined attribute type ' . $type, E_USER_ERROR);
-            return;
-        }
-
-        return $this->info[$type]->make($string);
-
-    }
-
-    /**
-     * Sets a new implementation for a type
-     * @param $type String type name
-     * @param $impl Object AttrDef for type
-     */
-    public function set($type, $impl) {
-        $this->info[$type] = $impl;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/AttrValidator.php b/extlib/HTMLPurifier/HTMLPurifier/AttrValidator.php
deleted file mode 100644
index 829a0f8f22..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/AttrValidator.php
+++ /dev/null
@@ -1,162 +0,0 @@
-<?php
-
-/**
- * Validates the attributes of a token. Doesn't manage required attributes
- * very well. The only reason we factored this out was because RemoveForeignElements
- * also needed it besides ValidateAttributes.
- */
-class HTMLPurifier_AttrValidator
-{
-
-    /**
-     * Validates the attributes of a token, returning a modified token
-     * that has valid tokens
-     * @param $token Reference to token to validate. We require a reference
-     *     because the operation this class performs on the token are
-     *     not atomic, so the context CurrentToken to be updated
-     *     throughout
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     */
-    public function validateToken(&$token, &$config, $context) {
-
-        $definition = $config->getHTMLDefinition();
-        $e =& $context->get('ErrorCollector', true);
-
-        // initialize IDAccumulator if necessary
-        $ok =& $context->get('IDAccumulator', true);
-        if (!$ok) {
-            $id_accumulator = HTMLPurifier_IDAccumulator::build($config, $context);
-            $context->register('IDAccumulator', $id_accumulator);
-        }
-
-        // initialize CurrentToken if necessary
-        $current_token =& $context->get('CurrentToken', true);
-        if (!$current_token) $context->register('CurrentToken', $token);
-
-        if (
-            !$token instanceof HTMLPurifier_Token_Start &&
-            !$token instanceof HTMLPurifier_Token_Empty
-        ) return $token;
-
-        // create alias to global definition array, see also $defs
-        // DEFINITION CALL
-        $d_defs = $definition->info_global_attr;
-
-        // don't update token until the very end, to ensure an atomic update
-        $attr = $token->attr;
-
-        // do global transformations (pre)
-        // nothing currently utilizes this
-        foreach ($definition->info_attr_transform_pre as $transform) {
-            $attr = $transform->transform($o = $attr, $config, $context);
-            if ($e) {
-                if ($attr != $o) $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
-            }
-        }
-
-        // do local transformations only applicable to this element (pre)
-        // ex. <p align="right"> to <p style="text-align:right;">
-        foreach ($definition->info[$token->name]->attr_transform_pre as $transform) {
-            $attr = $transform->transform($o = $attr, $config, $context);
-            if ($e) {
-                if ($attr != $o) $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
-            }
-        }
-
-        // create alias to this element's attribute definition array, see
-        // also $d_defs (global attribute definition array)
-        // DEFINITION CALL
-        $defs = $definition->info[$token->name]->attr;
-
-        $attr_key = false;
-        $context->register('CurrentAttr', $attr_key);
-
-        // iterate through all the attribute keypairs
-        // Watch out for name collisions: $key has previously been used
-        foreach ($attr as $attr_key => $value) {
-
-            // call the definition
-            if ( isset($defs[$attr_key]) ) {
-                // there is a local definition defined
-                if ($defs[$attr_key] === false) {
-                    // We've explicitly been told not to allow this element.
-                    // This is usually when there's a global definition
-                    // that must be overridden.
-                    // Theoretically speaking, we could have a
-                    // AttrDef_DenyAll, but this is faster!
-                    $result = false;
-                } else {
-                    // validate according to the element's definition
-                    $result = $defs[$attr_key]->validate(
-                                    $value, $config, $context
-                               );
-                }
-            } elseif ( isset($d_defs[$attr_key]) ) {
-                // there is a global definition defined, validate according
-                // to the global definition
-                $result = $d_defs[$attr_key]->validate(
-                                $value, $config, $context
-                           );
-            } else {
-                // system never heard of the attribute? DELETE!
-                $result = false;
-            }
-
-            // put the results into effect
-            if ($result === false || $result === null) {
-                // this is a generic error message that should replaced
-                // with more specific ones when possible
-                if ($e) $e->send(E_ERROR, 'AttrValidator: Attribute removed');
-
-                // remove the attribute
-                unset($attr[$attr_key]);
-            } elseif (is_string($result)) {
-                // generally, if a substitution is happening, there
-                // was some sort of implicit correction going on. We'll
-                // delegate it to the attribute classes to say exactly what.
-
-                // simple substitution
-                $attr[$attr_key] = $result;
-            } else {
-                // nothing happens
-            }
-
-            // we'd also want slightly more complicated substitution
-            // involving an array as the return value,
-            // although we're not sure how colliding attributes would
-            // resolve (certain ones would be completely overriden,
-            // others would prepend themselves).
-        }
-
-        $context->destroy('CurrentAttr');
-
-        // post transforms
-
-        // global (error reporting untested)
-        foreach ($definition->info_attr_transform_post as $transform) {
-            $attr = $transform->transform($o = $attr, $config, $context);
-            if ($e) {
-                if ($attr != $o) $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
-            }
-        }
-
-        // local (error reporting untested)
-        foreach ($definition->info[$token->name]->attr_transform_post as $transform) {
-            $attr = $transform->transform($o = $attr, $config, $context);
-            if ($e) {
-                if ($attr != $o) $e->send(E_NOTICE, 'AttrValidator: Attributes transformed', $o, $attr);
-            }
-        }
-
-        $token->attr = $attr;
-
-        // destroy CurrentToken if we made it ourselves
-        if (!$current_token) $context->destroy('CurrentToken');
-
-    }
-
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Bootstrap.php b/extlib/HTMLPurifier/HTMLPurifier/Bootstrap.php
deleted file mode 100644
index 559f61a232..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Bootstrap.php
+++ /dev/null
@@ -1,98 +0,0 @@
-<?php
-
-// constants are slow, so we use as few as possible
-if (!defined('HTMLPURIFIER_PREFIX')) {
-    define('HTMLPURIFIER_PREFIX', realpath(dirname(__FILE__) . '/..'));
-}
-
-// accomodations for versions earlier than 5.0.2
-// borrowed from PHP_Compat, LGPL licensed, by Aidan Lister <aidan@php.net>
-if (!defined('PHP_EOL')) {
-    switch (strtoupper(substr(PHP_OS, 0, 3))) {
-        case 'WIN':
-            define('PHP_EOL', "\r\n");
-            break;
-        case 'DAR':
-            define('PHP_EOL', "\r");
-            break;
-        default:
-            define('PHP_EOL', "\n");
-    }
-}
-
-/**
- * Bootstrap class that contains meta-functionality for HTML Purifier such as
- * the autoload function.
- *
- * @note
- *      This class may be used without any other files from HTML Purifier.
- */
-class HTMLPurifier_Bootstrap
-{
-
-    /**
-     * Autoload function for HTML Purifier
-     * @param $class Class to load
-     */
-    public static function autoload($class) {
-        $file = HTMLPurifier_Bootstrap::getPath($class);
-        if (!$file) return false;
-        require HTMLPURIFIER_PREFIX . '/' . $file;
-        return true;
-    }
-
-    /**
-     * Returns the path for a specific class.
-     */
-    public static function getPath($class) {
-        if (strncmp('HTMLPurifier', $class, 12) !== 0) return false;
-        // Custom implementations
-        if (strncmp('HTMLPurifier_Language_', $class, 22) === 0) {
-            $code = str_replace('_', '-', substr($class, 22));
-            $file = 'HTMLPurifier/Language/classes/' . $code . '.php';
-        } else {
-            $file = str_replace('_', '/', $class) . '.php';
-        }
-        if (!file_exists(HTMLPURIFIER_PREFIX . '/' . $file)) return false;
-        return $file;
-    }
-
-    /**
-     * "Pre-registers" our autoloader on the SPL stack.
-     */
-    public static function registerAutoload() {
-        $autoload = array('HTMLPurifier_Bootstrap', 'autoload');
-        if ( ($funcs = spl_autoload_functions()) === false ) {
-            spl_autoload_register($autoload);
-        } elseif (function_exists('spl_autoload_unregister')) {
-            $compat = version_compare(PHP_VERSION, '5.1.2', '<=') &&
-                      version_compare(PHP_VERSION, '5.1.0', '>=');
-            foreach ($funcs as $func) {
-                if (is_array($func)) {
-                    // :TRICKY: There are some compatibility issues and some
-                    // places where we need to error out
-                    $reflector = new ReflectionMethod($func[0], $func[1]);
-                    if (!$reflector->isStatic()) {
-                        throw new Exception('
-                            HTML Purifier autoloader registrar is not compatible
-                            with non-static object methods due to PHP Bug #44144;
-                            Please do not use HTMLPurifier.autoload.php (or any
-                            file that includes this file); instead, place the code:
-                            spl_autoload_register(array(\'HTMLPurifier_Bootstrap\', \'autoload\'))
-                            after your own autoloaders.
-                        ');
-                    }
-                    // Suprisingly, spl_autoload_register supports the
-                    // Class::staticMethod callback format, although call_user_func doesn't
-                    if ($compat) $func = implode('::', $func);
-                }
-                spl_autoload_unregister($func);
-            }
-            spl_autoload_register($autoload);
-            foreach ($funcs as $func) spl_autoload_register($func);
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/CSSDefinition.php b/extlib/HTMLPurifier/HTMLPurifier/CSSDefinition.php
deleted file mode 100644
index 6a2e6f56d9..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/CSSDefinition.php
+++ /dev/null
@@ -1,292 +0,0 @@
-<?php
-
-/**
- * Defines allowed CSS attributes and what their values are.
- * @see HTMLPurifier_HTMLDefinition
- */
-class HTMLPurifier_CSSDefinition extends HTMLPurifier_Definition
-{
-
-    public $type = 'CSS';
-
-    /**
-     * Assoc array of attribute name to definition object.
-     */
-    public $info = array();
-
-    /**
-     * Constructs the info array.  The meat of this class.
-     */
-    protected function doSetup($config) {
-
-        $this->info['text-align'] = new HTMLPurifier_AttrDef_Enum(
-            array('left', 'right', 'center', 'justify'), false);
-
-        $border_style =
-        $this->info['border-bottom-style'] =
-        $this->info['border-right-style'] =
-        $this->info['border-left-style'] =
-        $this->info['border-top-style'] =  new HTMLPurifier_AttrDef_Enum(
-            array('none', 'hidden', 'dotted', 'dashed', 'solid', 'double',
-            'groove', 'ridge', 'inset', 'outset'), false);
-
-        $this->info['border-style'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_style);
-
-        $this->info['clear'] = new HTMLPurifier_AttrDef_Enum(
-            array('none', 'left', 'right', 'both'), false);
-        $this->info['float'] = new HTMLPurifier_AttrDef_Enum(
-            array('none', 'left', 'right'), false);
-        $this->info['font-style'] = new HTMLPurifier_AttrDef_Enum(
-            array('normal', 'italic', 'oblique'), false);
-        $this->info['font-variant'] = new HTMLPurifier_AttrDef_Enum(
-            array('normal', 'small-caps'), false);
-
-        $uri_or_none = new HTMLPurifier_AttrDef_CSS_Composite(
-            array(
-                new HTMLPurifier_AttrDef_Enum(array('none')),
-                new HTMLPurifier_AttrDef_CSS_URI()
-            )
-        );
-
-        $this->info['list-style-position'] = new HTMLPurifier_AttrDef_Enum(
-            array('inside', 'outside'), false);
-        $this->info['list-style-type'] = new HTMLPurifier_AttrDef_Enum(
-            array('disc', 'circle', 'square', 'decimal', 'lower-roman',
-            'upper-roman', 'lower-alpha', 'upper-alpha', 'none'), false);
-        $this->info['list-style-image'] = $uri_or_none;
-
-        $this->info['list-style'] = new HTMLPurifier_AttrDef_CSS_ListStyle($config);
-
-        $this->info['text-transform'] = new HTMLPurifier_AttrDef_Enum(
-            array('capitalize', 'uppercase', 'lowercase', 'none'), false);
-        $this->info['color'] = new HTMLPurifier_AttrDef_CSS_Color();
-
-        $this->info['background-image'] = $uri_or_none;
-        $this->info['background-repeat'] = new HTMLPurifier_AttrDef_Enum(
-            array('repeat', 'repeat-x', 'repeat-y', 'no-repeat')
-        );
-        $this->info['background-attachment'] = new HTMLPurifier_AttrDef_Enum(
-            array('scroll', 'fixed')
-        );
-        $this->info['background-position'] = new HTMLPurifier_AttrDef_CSS_BackgroundPosition();
-
-        $border_color =
-        $this->info['border-top-color'] =
-        $this->info['border-bottom-color'] =
-        $this->info['border-left-color'] =
-        $this->info['border-right-color'] =
-        $this->info['background-color'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('transparent')),
-            new HTMLPurifier_AttrDef_CSS_Color()
-        ));
-
-        $this->info['background'] = new HTMLPurifier_AttrDef_CSS_Background($config);
-
-        $this->info['border-color'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_color);
-
-        $border_width =
-        $this->info['border-top-width'] =
-        $this->info['border-bottom-width'] =
-        $this->info['border-left-width'] =
-        $this->info['border-right-width'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('thin', 'medium', 'thick')),
-            new HTMLPurifier_AttrDef_CSS_Length('0') //disallow negative
-        ));
-
-        $this->info['border-width'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_width);
-
-        $this->info['letter-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('normal')),
-            new HTMLPurifier_AttrDef_CSS_Length()
-        ));
-
-        $this->info['word-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('normal')),
-            new HTMLPurifier_AttrDef_CSS_Length()
-        ));
-
-        $this->info['font-size'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('xx-small', 'x-small',
-                'small', 'medium', 'large', 'x-large', 'xx-large',
-                'larger', 'smaller')),
-            new HTMLPurifier_AttrDef_CSS_Percentage(),
-            new HTMLPurifier_AttrDef_CSS_Length()
-        ));
-
-        $this->info['line-height'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('normal')),
-            new HTMLPurifier_AttrDef_CSS_Number(true), // no negatives
-            new HTMLPurifier_AttrDef_CSS_Length('0'),
-            new HTMLPurifier_AttrDef_CSS_Percentage(true)
-        ));
-
-        $margin =
-        $this->info['margin-top'] =
-        $this->info['margin-bottom'] =
-        $this->info['margin-left'] =
-        $this->info['margin-right'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_CSS_Length(),
-            new HTMLPurifier_AttrDef_CSS_Percentage(),
-            new HTMLPurifier_AttrDef_Enum(array('auto'))
-        ));
-
-        $this->info['margin'] = new HTMLPurifier_AttrDef_CSS_Multiple($margin);
-
-        // non-negative
-        $padding =
-        $this->info['padding-top'] =
-        $this->info['padding-bottom'] =
-        $this->info['padding-left'] =
-        $this->info['padding-right'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_CSS_Length('0'),
-            new HTMLPurifier_AttrDef_CSS_Percentage(true)
-        ));
-
-        $this->info['padding'] = new HTMLPurifier_AttrDef_CSS_Multiple($padding);
-
-        $this->info['text-indent'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_CSS_Length(),
-            new HTMLPurifier_AttrDef_CSS_Percentage()
-        ));
-
-        $trusted_wh = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_CSS_Length('0'),
-            new HTMLPurifier_AttrDef_CSS_Percentage(true),
-            new HTMLPurifier_AttrDef_Enum(array('auto'))
-        ));
-        $max = $config->get('CSS.MaxImgLength');
-
-        $this->info['width'] =
-        $this->info['height'] =
-            $max === null ?
-            $trusted_wh :
-            new HTMLPurifier_AttrDef_Switch('img',
-                // For img tags:
-                new HTMLPurifier_AttrDef_CSS_Composite(array(
-                    new HTMLPurifier_AttrDef_CSS_Length('0', $max),
-                    new HTMLPurifier_AttrDef_Enum(array('auto'))
-                )),
-                // For everyone else:
-                $trusted_wh
-            );
-
-        $this->info['text-decoration'] = new HTMLPurifier_AttrDef_CSS_TextDecoration();
-
-        $this->info['font-family'] = new HTMLPurifier_AttrDef_CSS_FontFamily();
-
-        // this could use specialized code
-        $this->info['font-weight'] = new HTMLPurifier_AttrDef_Enum(
-            array('normal', 'bold', 'bolder', 'lighter', '100', '200', '300',
-            '400', '500', '600', '700', '800', '900'), false);
-
-        // MUST be called after other font properties, as it references
-        // a CSSDefinition object
-        $this->info['font'] = new HTMLPurifier_AttrDef_CSS_Font($config);
-
-        // same here
-        $this->info['border'] =
-        $this->info['border-bottom'] =
-        $this->info['border-top'] =
-        $this->info['border-left'] =
-        $this->info['border-right'] = new HTMLPurifier_AttrDef_CSS_Border($config);
-
-        $this->info['border-collapse'] = new HTMLPurifier_AttrDef_Enum(array(
-            'collapse', 'separate'));
-
-        $this->info['caption-side'] = new HTMLPurifier_AttrDef_Enum(array(
-            'top', 'bottom'));
-
-        $this->info['table-layout'] = new HTMLPurifier_AttrDef_Enum(array(
-            'auto', 'fixed'));
-
-        $this->info['vertical-align'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
-            new HTMLPurifier_AttrDef_Enum(array('baseline', 'sub', 'super',
-                'top', 'text-top', 'middle', 'bottom', 'text-bottom')),
-            new HTMLPurifier_AttrDef_CSS_Length(),
-            new HTMLPurifier_AttrDef_CSS_Percentage()
-        ));
-
-        $this->info['border-spacing'] = new HTMLPurifier_AttrDef_CSS_Multiple(new HTMLPurifier_AttrDef_CSS_Length(), 2);
-
-        // partial support
-        $this->info['white-space'] = new HTMLPurifier_AttrDef_Enum(array('nowrap'));
-
-        if ($config->get('CSS.Proprietary')) {
-            $this->doSetupProprietary($config);
-        }
-
-        if ($config->get('CSS.AllowTricky')) {
-            $this->doSetupTricky($config);
-        }
-
-        $allow_important = $config->get('CSS.AllowImportant');
-        // wrap all attr-defs with decorator that handles !important
-        foreach ($this->info as $k => $v) {
-            $this->info[$k] = new HTMLPurifier_AttrDef_CSS_ImportantDecorator($v, $allow_important);
-        }
-
-        $this->setupConfigStuff($config);
-    }
-
-    protected function doSetupProprietary($config) {
-        // Internet Explorer only scrollbar colors
-        $this->info['scrollbar-arrow-color']        = new HTMLPurifier_AttrDef_CSS_Color();
-        $this->info['scrollbar-base-color']         = new HTMLPurifier_AttrDef_CSS_Color();
-        $this->info['scrollbar-darkshadow-color']   = new HTMLPurifier_AttrDef_CSS_Color();
-        $this->info['scrollbar-face-color']         = new HTMLPurifier_AttrDef_CSS_Color();
-        $this->info['scrollbar-highlight-color']    = new HTMLPurifier_AttrDef_CSS_Color();
-        $this->info['scrollbar-shadow-color']       = new HTMLPurifier_AttrDef_CSS_Color();
-
-        // technically not proprietary, but CSS3, and no one supports it
-        $this->info['opacity']          = new HTMLPurifier_AttrDef_CSS_AlphaValue();
-        $this->info['-moz-opacity']     = new HTMLPurifier_AttrDef_CSS_AlphaValue();
-        $this->info['-khtml-opacity']   = new HTMLPurifier_AttrDef_CSS_AlphaValue();
-
-        // only opacity, for now
-        $this->info['filter'] = new HTMLPurifier_AttrDef_CSS_Filter();
-
-    }
-
-    protected function doSetupTricky($config) {
-        $this->info['display'] = new HTMLPurifier_AttrDef_Enum(array(
-            'inline', 'block', 'list-item', 'run-in', 'compact',
-            'marker', 'table', 'inline-table', 'table-row-group',
-            'table-header-group', 'table-footer-group', 'table-row',
-            'table-column-group', 'table-column', 'table-cell', 'table-caption', 'none'
-        ));
-        $this->info['visibility'] = new HTMLPurifier_AttrDef_Enum(array(
-            'visible', 'hidden', 'collapse'
-        ));
-        $this->info['overflow'] = new HTMLPurifier_AttrDef_Enum(array('visible', 'hidden', 'auto', 'scroll'));
-    }
-
-
-    /**
-     * Performs extra config-based processing. Based off of
-     * HTMLPurifier_HTMLDefinition.
-     * @todo Refactor duplicate elements into common class (probably using
-     *       composition, not inheritance).
-     */
-    protected function setupConfigStuff($config) {
-
-        // setup allowed elements
-        $support = "(for information on implementing this, see the ".
-                   "support forums) ";
-        $allowed_attributes = $config->get('CSS.AllowedProperties');
-        if ($allowed_attributes !== null) {
-            foreach ($this->info as $name => $d) {
-                if(!isset($allowed_attributes[$name])) unset($this->info[$name]);
-                unset($allowed_attributes[$name]);
-            }
-            // emit errors
-            foreach ($allowed_attributes as $name => $d) {
-                // :TODO: Is this htmlspecialchars() call really necessary?
-                $name = htmlspecialchars($name);
-                trigger_error("Style attribute '$name' is not supported $support", E_USER_WARNING);
-            }
-        }
-
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ChildDef.php b/extlib/HTMLPurifier/HTMLPurifier/ChildDef.php
deleted file mode 100644
index c5d5216dab..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ChildDef.php
+++ /dev/null
@@ -1,48 +0,0 @@
-<?php
-
-/**
- * Defines allowed child nodes and validates tokens against it.
- */
-abstract class HTMLPurifier_ChildDef
-{
-    /**
-     * Type of child definition, usually right-most part of class name lowercase.
-     * Used occasionally in terms of context.
-     */
-    public $type;
-
-    /**
-     * Bool that indicates whether or not an empty array of children is okay
-     *
-     * This is necessary for redundant checking when changes affecting
-     * a child node may cause a parent node to now be disallowed.
-     */
-    public $allow_empty;
-
-    /**
-     * Lookup array of all elements that this definition could possibly allow
-     */
-    public $elements = array();
-
-    /**
-     * Get lookup of tag names that should not close this element automatically.
-     * All other elements will do so.
-     */
-    public function getAllowedElements($config) {
-        return $this->elements;
-    }
-
-    /**
-     * Validates nodes according to definition and returns modification.
-     *
-     * @param $tokens_of_children Array of HTMLPurifier_Token
-     * @param $config HTMLPurifier_Config object
-     * @param $context HTMLPurifier_Context object
-     * @return bool true to leave nodes as is
-     * @return bool false to remove parent node
-     * @return array of replacement child tokens
-     */
-    abstract public function validateChildren($tokens_of_children, $config, $context);
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Chameleon.php b/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Chameleon.php
deleted file mode 100644
index 15c364ee33..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Chameleon.php
+++ /dev/null
@@ -1,48 +0,0 @@
-<?php
-
-/**
- * Definition that uses different definitions depending on context.
- *
- * The del and ins tags are notable because they allow different types of
- * elements depending on whether or not they're in a block or inline context.
- * Chameleon allows this behavior to happen by using two different
- * definitions depending on context.  While this somewhat generalized,
- * it is specifically intended for those two tags.
- */
-class HTMLPurifier_ChildDef_Chameleon extends HTMLPurifier_ChildDef
-{
-
-    /**
-     * Instance of the definition object to use when inline. Usually stricter.
-     */
-    public $inline;
-
-    /**
-     * Instance of the definition object to use when block.
-     */
-    public $block;
-
-    public $type = 'chameleon';
-
-    /**
-     * @param $inline List of elements to allow when inline.
-     * @param $block List of elements to allow when block.
-     */
-    public function __construct($inline, $block) {
-        $this->inline = new HTMLPurifier_ChildDef_Optional($inline);
-        $this->block  = new HTMLPurifier_ChildDef_Optional($block);
-        $this->elements = $this->block->elements;
-    }
-
-    public function validateChildren($tokens_of_children, $config, $context) {
-        if ($context->get('IsInline') === false) {
-            return $this->block->validateChildren(
-                $tokens_of_children, $config, $context);
-        } else {
-            return $this->inline->validateChildren(
-                $tokens_of_children, $config, $context);
-        }
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Custom.php b/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Custom.php
deleted file mode 100644
index b68047b4b5..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Custom.php
+++ /dev/null
@@ -1,90 +0,0 @@
-<?php
-
-/**
- * Custom validation class, accepts DTD child definitions
- *
- * @warning Currently this class is an all or nothing proposition, that is,
- *          it will only give a bool return value.
- */
-class HTMLPurifier_ChildDef_Custom extends HTMLPurifier_ChildDef
-{
-    public $type = 'custom';
-    public $allow_empty = false;
-    /**
-     * Allowed child pattern as defined by the DTD
-     */
-    public $dtd_regex;
-    /**
-     * PCRE regex derived from $dtd_regex
-     * @private
-     */
-    private $_pcre_regex;
-    /**
-     * @param $dtd_regex Allowed child pattern from the DTD
-     */
-    public function __construct($dtd_regex) {
-        $this->dtd_regex = $dtd_regex;
-        $this->_compileRegex();
-    }
-    /**
-     * Compiles the PCRE regex from a DTD regex ($dtd_regex to $_pcre_regex)
-     */
-    protected function _compileRegex() {
-        $raw = str_replace(' ', '', $this->dtd_regex);
-        if ($raw{0} != '(') {
-            $raw = "($raw)";
-        }
-        $el = '[#a-zA-Z0-9_.-]+';
-        $reg = $raw;
-
-        // COMPLICATED! AND MIGHT BE BUGGY! I HAVE NO CLUE WHAT I'M
-        // DOING! Seriously: if there's problems, please report them.
-
-        // collect all elements into the $elements array
-        preg_match_all("/$el/", $reg, $matches);
-        foreach ($matches[0] as $match) {
-            $this->elements[$match] = true;
-        }
-
-        // setup all elements as parentheticals with leading commas
-        $reg = preg_replace("/$el/", '(,\\0)', $reg);
-
-        // remove commas when they were not solicited
-        $reg = preg_replace("/([^,(|]\(+),/", '\\1', $reg);
-
-        // remove all non-paranthetical commas: they are handled by first regex
-        $reg = preg_replace("/,\(/", '(', $reg);
-
-        $this->_pcre_regex = $reg;
-    }
-    public function validateChildren($tokens_of_children, $config, $context) {
-        $list_of_children = '';
-        $nesting = 0; // depth into the nest
-        foreach ($tokens_of_children as $token) {
-            if (!empty($token->is_whitespace)) continue;
-
-            $is_child = ($nesting == 0); // direct
-
-            if ($token instanceof HTMLPurifier_Token_Start) {
-                $nesting++;
-            } elseif ($token instanceof HTMLPurifier_Token_End) {
-                $nesting--;
-            }
-
-            if ($is_child) {
-                $list_of_children .= $token->name . ',';
-            }
-        }
-        // add leading comma to deal with stray comma declarations
-        $list_of_children = ',' . rtrim($list_of_children, ',');
-        $okay =
-            preg_match(
-                '/^,?'.$this->_pcre_regex.'$/',
-                $list_of_children
-            );
-
-        return (bool) $okay;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Empty.php b/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Empty.php
deleted file mode 100644
index 13171f6651..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Empty.php
+++ /dev/null
@@ -1,20 +0,0 @@
-<?php
-
-/**
- * Definition that disallows all elements.
- * @warning validateChildren() in this class is actually never called, because
- *          empty elements are corrected in HTMLPurifier_Strategy_MakeWellFormed
- *          before child definitions are parsed in earnest by
- *          HTMLPurifier_Strategy_FixNesting.
- */
-class HTMLPurifier_ChildDef_Empty extends HTMLPurifier_ChildDef
-{
-    public $allow_empty = true;
-    public $type = 'empty';
-    public function __construct() {}
-    public function validateChildren($tokens_of_children, $config, $context) {
-        return array();
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Optional.php b/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Optional.php
deleted file mode 100644
index 32bcb9898e..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Optional.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-
-/**
- * Definition that allows a set of elements, and allows no children.
- * @note This is a hack to reuse code from HTMLPurifier_ChildDef_Required,
- *       really, one shouldn't inherit from the other.  Only altered behavior
- *       is to overload a returned false with an array.  Thus, it will never
- *       return false.
- */
-class HTMLPurifier_ChildDef_Optional extends HTMLPurifier_ChildDef_Required
-{
-    public $allow_empty = true;
-    public $type = 'optional';
-    public function validateChildren($tokens_of_children, $config, $context) {
-        $result = parent::validateChildren($tokens_of_children, $config, $context);
-        // we assume that $tokens_of_children is not modified
-        if ($result === false) {
-            if (empty($tokens_of_children)) return true;
-            elseif ($this->whitespace) return $tokens_of_children;
-            else return array();
-        }
-        return $result;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Required.php b/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Required.php
deleted file mode 100644
index 4889f249b8..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Required.php
+++ /dev/null
@@ -1,117 +0,0 @@
-<?php
-
-/**
- * Definition that allows a set of elements, but disallows empty children.
- */
-class HTMLPurifier_ChildDef_Required extends HTMLPurifier_ChildDef
-{
-    /**
-     * Lookup table of allowed elements.
-     * @public
-     */
-    public $elements = array();
-    /**
-     * Whether or not the last passed node was all whitespace.
-     */
-    protected $whitespace = false;
-    /**
-     * @param $elements List of allowed element names (lowercase).
-     */
-    public function __construct($elements) {
-        if (is_string($elements)) {
-            $elements = str_replace(' ', '', $elements);
-            $elements = explode('|', $elements);
-        }
-        $keys = array_keys($elements);
-        if ($keys == array_keys($keys)) {
-            $elements = array_flip($elements);
-            foreach ($elements as $i => $x) {
-                $elements[$i] = true;
-                if (empty($i)) unset($elements[$i]); // remove blank
-            }
-        }
-        $this->elements = $elements;
-    }
-    public $allow_empty = false;
-    public $type = 'required';
-    public function validateChildren($tokens_of_children, $config, $context) {
-        // Flag for subclasses
-        $this->whitespace = false;
-
-        // if there are no tokens, delete parent node
-        if (empty($tokens_of_children)) return false;
-
-        // the new set of children
-        $result = array();
-
-        // current depth into the nest
-        $nesting = 0;
-
-        // whether or not we're deleting a node
-        $is_deleting = false;
-
-        // whether or not parsed character data is allowed
-        // this controls whether or not we silently drop a tag
-        // or generate escaped HTML from it
-        $pcdata_allowed = isset($this->elements['#PCDATA']);
-
-        // a little sanity check to make sure it's not ALL whitespace
-        $all_whitespace = true;
-
-        // some configuration
-        $escape_invalid_children = $config->get('Core.EscapeInvalidChildren');
-
-        // generator
-        $gen = new HTMLPurifier_Generator($config, $context);
-
-        foreach ($tokens_of_children as $token) {
-            if (!empty($token->is_whitespace)) {
-                $result[] = $token;
-                continue;
-            }
-            $all_whitespace = false; // phew, we're not talking about whitespace
-
-            $is_child = ($nesting == 0);
-
-            if ($token instanceof HTMLPurifier_Token_Start) {
-                $nesting++;
-            } elseif ($token instanceof HTMLPurifier_Token_End) {
-                $nesting--;
-            }
-
-            if ($is_child) {
-                $is_deleting = false;
-                if (!isset($this->elements[$token->name])) {
-                    $is_deleting = true;
-                    if ($pcdata_allowed && $token instanceof HTMLPurifier_Token_Text) {
-                        $result[] = $token;
-                    } elseif ($pcdata_allowed && $escape_invalid_children) {
-                        $result[] = new HTMLPurifier_Token_Text(
-                            $gen->generateFromToken($token)
-                        );
-                    }
-                    continue;
-                }
-            }
-            if (!$is_deleting || ($pcdata_allowed && $token instanceof HTMLPurifier_Token_Text)) {
-                $result[] = $token;
-            } elseif ($pcdata_allowed && $escape_invalid_children) {
-                $result[] =
-                    new HTMLPurifier_Token_Text(
-                        $gen->generateFromToken($token)
-                    );
-            } else {
-                // drop silently
-            }
-        }
-        if (empty($result)) return false;
-        if ($all_whitespace) {
-            $this->whitespace = true;
-            return false;
-        }
-        if ($tokens_of_children == $result) return true;
-        return $result;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/StrictBlockquote.php b/extlib/HTMLPurifier/HTMLPurifier/ChildDef/StrictBlockquote.php
deleted file mode 100644
index dfae8a6e5e..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/StrictBlockquote.php
+++ /dev/null
@@ -1,88 +0,0 @@
-<?php
-
-/**
- * Takes the contents of blockquote when in strict and reformats for validation.
- */
-class HTMLPurifier_ChildDef_StrictBlockquote extends HTMLPurifier_ChildDef_Required
-{
-    protected $real_elements;
-    protected $fake_elements;
-    public $allow_empty = true;
-    public $type = 'strictblockquote';
-    protected $init = false;
-
-    /**
-     * @note We don't want MakeWellFormed to auto-close inline elements since
-     *       they might be allowed.
-     */
-    public function getAllowedElements($config) {
-        $this->init($config);
-        return $this->fake_elements;
-    }
-
-    public function validateChildren($tokens_of_children, $config, $context) {
-
-        $this->init($config);
-
-        // trick the parent class into thinking it allows more
-        $this->elements = $this->fake_elements;
-        $result = parent::validateChildren($tokens_of_children, $config, $context);
-        $this->elements = $this->real_elements;
-
-        if ($result === false) return array();
-        if ($result === true) $result = $tokens_of_children;
-
-        $def = $config->getHTMLDefinition();
-        $block_wrap_start = new HTMLPurifier_Token_Start($def->info_block_wrapper);
-        $block_wrap_end   = new HTMLPurifier_Token_End(  $def->info_block_wrapper);
-        $is_inline = false;
-        $depth = 0;
-        $ret = array();
-
-        // assuming that there are no comment tokens
-        foreach ($result as $i => $token) {
-            $token = $result[$i];
-            // ifs are nested for readability
-            if (!$is_inline) {
-                if (!$depth) {
-                     if (
-                        ($token instanceof HTMLPurifier_Token_Text && !$token->is_whitespace) ||
-                        (!$token instanceof HTMLPurifier_Token_Text && !isset($this->elements[$token->name]))
-                     ) {
-                        $is_inline = true;
-                        $ret[] = $block_wrap_start;
-                     }
-                }
-            } else {
-                if (!$depth) {
-                    // starting tokens have been inline text / empty
-                    if ($token instanceof HTMLPurifier_Token_Start || $token instanceof HTMLPurifier_Token_Empty) {
-                        if (isset($this->elements[$token->name])) {
-                            // ended
-                            $ret[] = $block_wrap_end;
-                            $is_inline = false;
-                        }
-                    }
-                }
-            }
-            $ret[] = $token;
-            if ($token instanceof HTMLPurifier_Token_Start) $depth++;
-            if ($token instanceof HTMLPurifier_Token_End)   $depth--;
-        }
-        if ($is_inline) $ret[] = $block_wrap_end;
-        return $ret;
-    }
-
-    private function init($config) {
-        if (!$this->init) {
-            $def = $config->getHTMLDefinition();
-            // allow all inline elements
-            $this->real_elements = $this->elements;
-            $this->fake_elements = $def->info_content_sets['Flow'];
-            $this->fake_elements['#PCDATA'] = true;
-            $this->init = true;
-        }
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Table.php b/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Table.php
deleted file mode 100644
index 34f0227dd2..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ChildDef/Table.php
+++ /dev/null
@@ -1,142 +0,0 @@
-<?php
-
-/**
- * Definition for tables
- */
-class HTMLPurifier_ChildDef_Table extends HTMLPurifier_ChildDef
-{
-    public $allow_empty = false;
-    public $type = 'table';
-    public $elements = array('tr' => true, 'tbody' => true, 'thead' => true,
-        'tfoot' => true, 'caption' => true, 'colgroup' => true, 'col' => true);
-    public function __construct() {}
-    public function validateChildren($tokens_of_children, $config, $context) {
-        if (empty($tokens_of_children)) return false;
-
-        // this ensures that the loop gets run one last time before closing
-        // up. It's a little bit of a hack, but it works! Just make sure you
-        // get rid of the token later.
-        $tokens_of_children[] = false;
-
-        // only one of these elements is allowed in a table
-        $caption = false;
-        $thead   = false;
-        $tfoot   = false;
-
-        // as many of these as you want
-        $cols    = array();
-        $content = array();
-
-        $nesting = 0; // current depth so we can determine nodes
-        $is_collecting = false; // are we globbing together tokens to package
-                                // into one of the collectors?
-        $collection = array(); // collected nodes
-        $tag_index = 0; // the first node might be whitespace,
-                            // so this tells us where the start tag is
-
-        foreach ($tokens_of_children as $token) {
-            $is_child = ($nesting == 0);
-
-            if ($token === false) {
-                // terminating sequence started
-            } elseif ($token instanceof HTMLPurifier_Token_Start) {
-                $nesting++;
-            } elseif ($token instanceof HTMLPurifier_Token_End) {
-                $nesting--;
-            }
-
-            // handle node collection
-            if ($is_collecting) {
-                if ($is_child) {
-                    // okay, let's stash the tokens away
-                    // first token tells us the type of the collection
-                    switch ($collection[$tag_index]->name) {
-                        case 'tr':
-                        case 'tbody':
-                            $content[] = $collection;
-                            break;
-                        case 'caption':
-                            if ($caption !== false) break;
-                            $caption = $collection;
-                            break;
-                        case 'thead':
-                        case 'tfoot':
-                            // access the appropriate variable, $thead or $tfoot
-                            $var = $collection[$tag_index]->name;
-                            if ($$var === false) {
-                                $$var = $collection;
-                            } else {
-                                // transmutate the first and less entries into
-                                // tbody tags, and then put into content
-                                $collection[$tag_index]->name = 'tbody';
-                                $collection[count($collection)-1]->name = 'tbody';
-                                $content[] = $collection;
-                            }
-                            break;
-                         case 'colgroup':
-                            $cols[] = $collection;
-                            break;
-                    }
-                    $collection = array();
-                    $is_collecting = false;
-                    $tag_index = 0;
-                } else {
-                    // add the node to the collection
-                    $collection[] = $token;
-                }
-            }
-
-            // terminate
-            if ($token === false) break;
-
-            if ($is_child) {
-                // determine what we're dealing with
-                if ($token->name == 'col') {
-                    // the only empty tag in the possie, we can handle it
-                    // immediately
-                    $cols[] = array_merge($collection, array($token));
-                    $collection = array();
-                    $tag_index = 0;
-                    continue;
-                }
-                switch($token->name) {
-                    case 'caption':
-                    case 'colgroup':
-                    case 'thead':
-                    case 'tfoot':
-                    case 'tbody':
-                    case 'tr':
-                        $is_collecting = true;
-                        $collection[] = $token;
-                        continue;
-                    default:
-                        if (!empty($token->is_whitespace)) {
-                            $collection[] = $token;
-                            $tag_index++;
-                        }
-                        continue;
-                }
-            }
-        }
-
-        if (empty($content)) return false;
-
-        $ret = array();
-        if ($caption !== false) $ret = array_merge($ret, $caption);
-        if ($cols !== false)    foreach ($cols as $token_array) $ret = array_merge($ret, $token_array);
-        if ($thead !== false)   $ret = array_merge($ret, $thead);
-        if ($tfoot !== false)   $ret = array_merge($ret, $tfoot);
-        foreach ($content as $token_array) $ret = array_merge($ret, $token_array);
-        if (!empty($collection) && $is_collecting == false){
-            // grab the trailing space
-            $ret = array_merge($ret, $collection);
-        }
-
-        array_pop($tokens_of_children); // remove phantom token
-
-        return ($ret === $tokens_of_children) ? true : $ret;
-
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Config.php b/extlib/HTMLPurifier/HTMLPurifier/Config.php
deleted file mode 100644
index a01706043a..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Config.php
+++ /dev/null
@@ -1,580 +0,0 @@
-<?php
-
-/**
- * Configuration object that triggers customizable behavior.
- *
- * @warning This class is strongly defined: that means that the class
- *          will fail if an undefined directive is retrieved or set.
- *
- * @note Many classes that could (although many times don't) use the
- *       configuration object make it a mandatory parameter.  This is
- *       because a configuration object should always be forwarded,
- *       otherwise, you run the risk of missing a parameter and then
- *       being stumped when a configuration directive doesn't work.
- *
- * @todo Reconsider some of the public member variables
- */
-class HTMLPurifier_Config
-{
-
-    /**
-     * HTML Purifier's version
-     */
-    public $version = '4.0.0';
-
-    /**
-     * Bool indicator whether or not to automatically finalize
-     * the object if a read operation is done
-     */
-    public $autoFinalize = true;
-
-    // protected member variables
-
-    /**
-     * Namespace indexed array of serials for specific namespaces (see
-     * getSerial() for more info).
-     */
-    protected $serials = array();
-
-    /**
-     * Serial for entire configuration object
-     */
-    protected $serial;
-
-    /**
-     * Parser for variables
-     */
-    protected $parser;
-
-    /**
-     * Reference HTMLPurifier_ConfigSchema for value checking
-     * @note This is public for introspective purposes. Please don't
-     *       abuse!
-     */
-    public $def;
-
-    /**
-     * Indexed array of definitions
-     */
-    protected $definitions;
-
-    /**
-     * Bool indicator whether or not config is finalized
-     */
-    protected $finalized = false;
-
-    /**
-     * Property list containing configuration directives.
-     */
-    protected $plist;
-
-    /**
-     * Whether or not a set is taking place due to an
-     * alias lookup.
-     */
-    private $aliasMode;
-
-    /**
-     * Set to false if you do not want line and file numbers in errors
-     * (useful when unit testing)
-     */
-    public $chatty = true;
-
-    /**
-     * Current lock; only gets to this namespace are allowed.
-     */
-    private $lock;
-
-    /**
-     * @param $definition HTMLPurifier_ConfigSchema that defines what directives
-     *                    are allowed.
-     */
-    public function __construct($definition, $parent = null) {
-        $parent = $parent ? $parent : $definition->defaultPlist;
-        $this->plist = new HTMLPurifier_PropertyList($parent);
-        $this->def = $definition; // keep a copy around for checking
-        $this->parser = new HTMLPurifier_VarParser_Flexible();
-    }
-
-    /**
-     * Convenience constructor that creates a config object based on a mixed var
-     * @param mixed $config Variable that defines the state of the config
-     *                      object. Can be: a HTMLPurifier_Config() object,
-     *                      an array of directives based on loadArray(),
-     *                      or a string filename of an ini file.
-     * @param HTMLPurifier_ConfigSchema Schema object
-     * @return Configured HTMLPurifier_Config object
-     */
-    public static function create($config, $schema = null) {
-        if ($config instanceof HTMLPurifier_Config) {
-            // pass-through
-            return $config;
-        }
-        if (!$schema) {
-            $ret = HTMLPurifier_Config::createDefault();
-        } else {
-            $ret = new HTMLPurifier_Config($schema);
-        }
-        if (is_string($config)) $ret->loadIni($config);
-        elseif (is_array($config)) $ret->loadArray($config);
-        return $ret;
-    }
-
-    /**
-     * Creates a new config object that inherits from a previous one.
-     * @param HTMLPurifier_Config $config Configuration object to inherit
-     *        from.
-     * @return HTMLPurifier_Config object with $config as its parent.
-     */
-    public static function inherit(HTMLPurifier_Config $config) {
-        return new HTMLPurifier_Config($config->def, $config->plist);
-    }
-
-    /**
-     * Convenience constructor that creates a default configuration object.
-     * @return Default HTMLPurifier_Config object.
-     */
-    public static function createDefault() {
-        $definition = HTMLPurifier_ConfigSchema::instance();
-        $config = new HTMLPurifier_Config($definition);
-        return $config;
-    }
-
-    /**
-     * Retreives a value from the configuration.
-     * @param $key String key
-     */
-    public function get($key, $a = null) {
-        if ($a !== null) {
-            $this->triggerError("Using deprecated API: use \$config->get('$key.$a') instead", E_USER_WARNING);
-            $key = "$key.$a";
-        }
-        if (!$this->finalized) $this->autoFinalize();
-        if (!isset($this->def->info[$key])) {
-            // can't add % due to SimpleTest bug
-            $this->triggerError('Cannot retrieve value of undefined directive ' . htmlspecialchars($key),
-                E_USER_WARNING);
-            return;
-        }
-        if (isset($this->def->info[$key]->isAlias)) {
-            $d = $this->def->info[$key];
-            $this->triggerError('Cannot get value from aliased directive, use real name ' . $d->key,
-                E_USER_ERROR);
-            return;
-        }
-        if ($this->lock) {
-            list($ns) = explode('.', $key);
-            if ($ns !== $this->lock) {
-                $this->triggerError('Cannot get value of namespace ' . $ns . ' when lock for ' . $this->lock . ' is active, this probably indicates a Definition setup method is accessing directives that are not within its namespace', E_USER_ERROR);
-                return;
-            }
-        }
-        return $this->plist->get($key);
-    }
-
-    /**
-     * Retreives an array of directives to values from a given namespace
-     * @param $namespace String namespace
-     */
-    public function getBatch($namespace) {
-        if (!$this->finalized) $this->autoFinalize();
-        $full = $this->getAll();
-        if (!isset($full[$namespace])) {
-            $this->triggerError('Cannot retrieve undefined namespace ' . htmlspecialchars($namespace),
-                E_USER_WARNING);
-            return;
-        }
-        return $full[$namespace];
-    }
-
-    /**
-     * Returns a md5 signature of a segment of the configuration object
-     * that uniquely identifies that particular configuration
-     * @note Revision is handled specially and is removed from the batch
-     *       before processing!
-     * @param $namespace Namespace to get serial for
-     */
-    public function getBatchSerial($namespace) {
-        if (empty($this->serials[$namespace])) {
-            $batch = $this->getBatch($namespace);
-            unset($batch['DefinitionRev']);
-            $this->serials[$namespace] = md5(serialize($batch));
-        }
-        return $this->serials[$namespace];
-    }
-
-    /**
-     * Returns a md5 signature for the entire configuration object
-     * that uniquely identifies that particular configuration
-     */
-    public function getSerial() {
-        if (empty($this->serial)) {
-            $this->serial = md5(serialize($this->getAll()));
-        }
-        return $this->serial;
-    }
-
-    /**
-     * Retrieves all directives, organized by namespace
-     * @warning This is a pretty inefficient function, avoid if you can
-     */
-    public function getAll() {
-        if (!$this->finalized) $this->autoFinalize();
-        $ret = array();
-        foreach ($this->plist->squash() as $name => $value) {
-            list($ns, $key) = explode('.', $name, 2);
-            $ret[$ns][$key] = $value;
-        }
-        return $ret;
-    }
-
-    /**
-     * Sets a value to configuration.
-     * @param $key String key
-     * @param $value Mixed value
-     */
-    public function set($key, $value, $a = null) {
-        if (strpos($key, '.') === false) {
-            $namespace = $key;
-            $directive = $value;
-            $value = $a;
-            $key = "$key.$directive";
-            $this->triggerError("Using deprecated API: use \$config->set('$key', ...) instead", E_USER_NOTICE);
-        } else {
-            list($namespace) = explode('.', $key);
-        }
-        if ($this->isFinalized('Cannot set directive after finalization')) return;
-        if (!isset($this->def->info[$key])) {
-            $this->triggerError('Cannot set undefined directive ' . htmlspecialchars($key) . ' to value',
-                E_USER_WARNING);
-            return;
-        }
-        $def = $this->def->info[$key];
-
-        if (isset($def->isAlias)) {
-            if ($this->aliasMode) {
-                $this->triggerError('Double-aliases not allowed, please fix '.
-                    'ConfigSchema bug with' . $key, E_USER_ERROR);
-                return;
-            }
-            $this->aliasMode = true;
-            $this->set($def->key, $value);
-            $this->aliasMode = false;
-            $this->triggerError("$key is an alias, preferred directive name is {$def->key}", E_USER_NOTICE);
-            return;
-        }
-
-        // Raw type might be negative when using the fully optimized form
-        // of stdclass, which indicates allow_null == true
-        $rtype = is_int($def) ? $def : $def->type;
-        if ($rtype < 0) {
-            $type = -$rtype;
-            $allow_null = true;
-        } else {
-            $type = $rtype;
-            $allow_null = isset($def->allow_null);
-        }
-
-        try {
-            $value = $this->parser->parse($value, $type, $allow_null);
-        } catch (HTMLPurifier_VarParserException $e) {
-            $this->triggerError('Value for ' . $key . ' is of invalid type, should be ' . HTMLPurifier_VarParser::getTypeName($type), E_USER_WARNING);
-            return;
-        }
-        if (is_string($value) && is_object($def)) {
-            // resolve value alias if defined
-            if (isset($def->aliases[$value])) {
-                $value = $def->aliases[$value];
-            }
-            // check to see if the value is allowed
-            if (isset($def->allowed) && !isset($def->allowed[$value])) {
-                $this->triggerError('Value not supported, valid values are: ' .
-                    $this->_listify($def->allowed), E_USER_WARNING);
-                return;
-            }
-        }
-        $this->plist->set($key, $value);
-
-        // reset definitions if the directives they depend on changed
-        // this is a very costly process, so it's discouraged
-        // with finalization
-        if ($namespace == 'HTML' || $namespace == 'CSS' || $namespace == 'URI') {
-            $this->definitions[$namespace] = null;
-        }
-
-        $this->serials[$namespace] = false;
-    }
-
-    /**
-     * Convenience function for error reporting
-     */
-    private function _listify($lookup) {
-        $list = array();
-        foreach ($lookup as $name => $b) $list[] = $name;
-        return implode(', ', $list);
-    }
-
-    /**
-     * Retrieves object reference to the HTML definition.
-     * @param $raw Return a copy that has not been setup yet. Must be
-     *             called before it's been setup, otherwise won't work.
-     */
-    public function getHTMLDefinition($raw = false) {
-        return $this->getDefinition('HTML', $raw);
-    }
-
-    /**
-     * Retrieves object reference to the CSS definition
-     * @param $raw Return a copy that has not been setup yet. Must be
-     *             called before it's been setup, otherwise won't work.
-     */
-    public function getCSSDefinition($raw = false) {
-        return $this->getDefinition('CSS', $raw);
-    }
-
-    /**
-     * Retrieves a definition
-     * @param $type Type of definition: HTML, CSS, etc
-     * @param $raw  Whether or not definition should be returned raw
-     */
-    public function getDefinition($type, $raw = false) {
-        if (!$this->finalized) $this->autoFinalize();
-        // temporarily suspend locks, so we can handle recursive definition calls
-        $lock = $this->lock;
-        $this->lock = null;
-        $factory = HTMLPurifier_DefinitionCacheFactory::instance();
-        $cache = $factory->create($type, $this);
-        $this->lock = $lock;
-        if (!$raw) {
-            // see if we can quickly supply a definition
-            if (!empty($this->definitions[$type])) {
-                if (!$this->definitions[$type]->setup) {
-                    $this->definitions[$type]->setup($this);
-                    $cache->set($this->definitions[$type], $this);
-                }
-                return $this->definitions[$type];
-            }
-            // memory check missed, try cache
-            $this->definitions[$type] = $cache->get($this);
-            if ($this->definitions[$type]) {
-                // definition in cache, return it
-                return $this->definitions[$type];
-            }
-        } elseif (
-            !empty($this->definitions[$type]) &&
-            !$this->definitions[$type]->setup
-        ) {
-            // raw requested, raw in memory, quick return
-            return $this->definitions[$type];
-        }
-        // quick checks failed, let's create the object
-        if ($type == 'HTML') {
-            $this->definitions[$type] = new HTMLPurifier_HTMLDefinition();
-        } elseif ($type == 'CSS') {
-            $this->definitions[$type] = new HTMLPurifier_CSSDefinition();
-        } elseif ($type == 'URI') {
-            $this->definitions[$type] = new HTMLPurifier_URIDefinition();
-        } else {
-            throw new HTMLPurifier_Exception("Definition of $type type not supported");
-        }
-        // quick abort if raw
-        if ($raw) {
-            if (is_null($this->get($type . '.DefinitionID'))) {
-                // fatally error out if definition ID not set
-                throw new HTMLPurifier_Exception("Cannot retrieve raw version without specifying %$type.DefinitionID");
-            }
-            return $this->definitions[$type];
-        }
-        // set it up
-        $this->lock = $type;
-        $this->definitions[$type]->setup($this);
-        $this->lock = null;
-        // save in cache
-        $cache->set($this->definitions[$type], $this);
-        return $this->definitions[$type];
-    }
-
-    /**
-     * Loads configuration values from an array with the following structure:
-     * Namespace.Directive => Value
-     * @param $config_array Configuration associative array
-     */
-    public function loadArray($config_array) {
-        if ($this->isFinalized('Cannot load directives after finalization')) return;
-        foreach ($config_array as $key => $value) {
-            $key = str_replace('_', '.', $key);
-            if (strpos($key, '.') !== false) {
-                $this->set($key, $value);
-            } else {
-                $namespace = $key;
-                $namespace_values = $value;
-                foreach ($namespace_values as $directive => $value) {
-                    $this->set($namespace .'.'. $directive, $value);
-                }
-            }
-        }
-    }
-
-    /**
-     * Returns a list of array(namespace, directive) for all directives
-     * that are allowed in a web-form context as per an allowed
-     * namespaces/directives list.
-     * @param $allowed List of allowed namespaces/directives
-     */
-    public static function getAllowedDirectivesForForm($allowed, $schema = null) {
-        if (!$schema) {
-            $schema = HTMLPurifier_ConfigSchema::instance();
-        }
-        if ($allowed !== true) {
-             if (is_string($allowed)) $allowed = array($allowed);
-             $allowed_ns = array();
-             $allowed_directives = array();
-             $blacklisted_directives = array();
-             foreach ($allowed as $ns_or_directive) {
-                 if (strpos($ns_or_directive, '.') !== false) {
-                     // directive
-                     if ($ns_or_directive[0] == '-') {
-                         $blacklisted_directives[substr($ns_or_directive, 1)] = true;
-                     } else {
-                         $allowed_directives[$ns_or_directive] = true;
-                     }
-                 } else {
-                     // namespace
-                     $allowed_ns[$ns_or_directive] = true;
-                 }
-             }
-        }
-        $ret = array();
-        foreach ($schema->info as $key => $def) {
-            list($ns, $directive) = explode('.', $key, 2);
-            if ($allowed !== true) {
-                if (isset($blacklisted_directives["$ns.$directive"])) continue;
-                if (!isset($allowed_directives["$ns.$directive"]) && !isset($allowed_ns[$ns])) continue;
-            }
-            if (isset($def->isAlias)) continue;
-            if ($directive == 'DefinitionID' || $directive == 'DefinitionRev') continue;
-            $ret[] = array($ns, $directive);
-        }
-        return $ret;
-    }
-
-    /**
-     * Loads configuration values from $_GET/$_POST that were posted
-     * via ConfigForm
-     * @param $array $_GET or $_POST array to import
-     * @param $index Index/name that the config variables are in
-     * @param $allowed List of allowed namespaces/directives
-     * @param $mq_fix Boolean whether or not to enable magic quotes fix
-     * @param $schema Instance of HTMLPurifier_ConfigSchema to use, if not global copy
-     */
-    public static function loadArrayFromForm($array, $index = false, $allowed = true, $mq_fix = true, $schema = null) {
-        $ret = HTMLPurifier_Config::prepareArrayFromForm($array, $index, $allowed, $mq_fix, $schema);
-        $config = HTMLPurifier_Config::create($ret, $schema);
-        return $config;
-    }
-
-    /**
-     * Merges in configuration values from $_GET/$_POST to object. NOT STATIC.
-     * @note Same parameters as loadArrayFromForm
-     */
-    public function mergeArrayFromForm($array, $index = false, $allowed = true, $mq_fix = true) {
-         $ret = HTMLPurifier_Config::prepareArrayFromForm($array, $index, $allowed, $mq_fix, $this->def);
-         $this->loadArray($ret);
-    }
-
-    /**
-     * Prepares an array from a form into something usable for the more
-     * strict parts of HTMLPurifier_Config
-     */
-    public static function prepareArrayFromForm($array, $index = false, $allowed = true, $mq_fix = true, $schema = null) {
-        if ($index !== false) $array = (isset($array[$index]) && is_array($array[$index])) ? $array[$index] : array();
-        $mq = $mq_fix && function_exists('get_magic_quotes_gpc') && get_magic_quotes_gpc();
-
-        $allowed = HTMLPurifier_Config::getAllowedDirectivesForForm($allowed, $schema);
-        $ret = array();
-        foreach ($allowed as $key) {
-            list($ns, $directive) = $key;
-            $skey = "$ns.$directive";
-            if (!empty($array["Null_$skey"])) {
-                $ret[$ns][$directive] = null;
-                continue;
-            }
-            if (!isset($array[$skey])) continue;
-            $value = $mq ? stripslashes($array[$skey]) : $array[$skey];
-            $ret[$ns][$directive] = $value;
-        }
-        return $ret;
-    }
-
-    /**
-     * Loads configuration values from an ini file
-     * @param $filename Name of ini file
-     */
-    public function loadIni($filename) {
-        if ($this->isFinalized('Cannot load directives after finalization')) return;
-        $array = parse_ini_file($filename, true);
-        $this->loadArray($array);
-    }
-
-    /**
-     * Checks whether or not the configuration object is finalized.
-     * @param $error String error message, or false for no error
-     */
-    public function isFinalized($error = false) {
-        if ($this->finalized && $error) {
-            $this->triggerError($error, E_USER_ERROR);
-        }
-        return $this->finalized;
-    }
-
-    /**
-     * Finalizes configuration only if auto finalize is on and not
-     * already finalized
-     */
-    public function autoFinalize() {
-        if ($this->autoFinalize) {
-            $this->finalize();
-        } else {
-            $this->plist->squash(true);
-        }
-    }
-
-    /**
-     * Finalizes a configuration object, prohibiting further change
-     */
-    public function finalize() {
-        $this->finalized = true;
-        unset($this->parser);
-    }
-
-    /**
-     * Produces a nicely formatted error message by supplying the
-     * stack frame information from two levels up and OUTSIDE of
-     * HTMLPurifier_Config.
-     */
-    protected function triggerError($msg, $no) {
-        // determine previous stack frame
-        $backtrace = debug_backtrace();
-        if ($this->chatty && isset($backtrace[1])) {
-            $frame = $backtrace[1];
-            $extra = " on line {$frame['line']} in file {$frame['file']}";
-        } else {
-            $extra = '';
-        }
-        trigger_error($msg . $extra, $no);
-    }
-
-    /**
-     * Returns a serialized form of the configuration object that can
-     * be reconstituted.
-     */
-    public function serialize() {
-        $this->getDefinition('HTML');
-        $this->getDefinition('CSS');
-        $this->getDefinition('URI');
-        return serialize($this);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema.php b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema.php
deleted file mode 100644
index 67be5c71fd..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema.php
+++ /dev/null
@@ -1,158 +0,0 @@
-<?php
-
-/**
- * Configuration definition, defines directives and their defaults.
- */
-class HTMLPurifier_ConfigSchema {
-
-    /**
-     * Defaults of the directives and namespaces.
-     * @note This shares the exact same structure as HTMLPurifier_Config::$conf
-     */
-    public $defaults = array();
-
-    /**
-     * The default property list. Do not edit this property list.
-     */
-    public $defaultPlist;
-
-    /**
-     * Definition of the directives. The structure of this is:
-     *
-     *  array(
-     *      'Namespace' => array(
-     *          'Directive' => new stdclass(),
-     *      )
-     *  )
-     *
-     * The stdclass may have the following properties:
-     *
-     *  - If isAlias isn't set:
-     *      - type: Integer type of directive, see HTMLPurifier_VarParser for definitions
-     *      - allow_null: If set, this directive allows null values
-     *      - aliases: If set, an associative array of value aliases to real values
-     *      - allowed: If set, a lookup array of allowed (string) values
-     *  - If isAlias is set:
-     *      - namespace: Namespace this directive aliases to
-     *      - name: Directive name this directive aliases to
-     *
-     * In certain degenerate cases, stdclass will actually be an integer. In
-     * that case, the value is equivalent to an stdclass with the type
-     * property set to the integer. If the integer is negative, type is
-     * equal to the absolute value of integer, and allow_null is true.
-     *
-     * This class is friendly with HTMLPurifier_Config. If you need introspection
-     * about the schema, you're better of using the ConfigSchema_Interchange,
-     * which uses more memory but has much richer information.
-     */
-    public $info = array();
-
-    /**
-     * Application-wide singleton
-     */
-    static protected $singleton;
-
-    public function __construct() {
-        $this->defaultPlist = new HTMLPurifier_PropertyList();
-    }
-
-    /**
-     * Unserializes the default ConfigSchema.
-     */
-    public static function makeFromSerial() {
-        return unserialize(file_get_contents(HTMLPURIFIER_PREFIX . '/HTMLPurifier/ConfigSchema/schema.ser'));
-    }
-
-    /**
-     * Retrieves an instance of the application-wide configuration definition.
-     */
-    public static function instance($prototype = null) {
-        if ($prototype !== null) {
-            HTMLPurifier_ConfigSchema::$singleton = $prototype;
-        } elseif (HTMLPurifier_ConfigSchema::$singleton === null || $prototype === true) {
-            HTMLPurifier_ConfigSchema::$singleton = HTMLPurifier_ConfigSchema::makeFromSerial();
-        }
-        return HTMLPurifier_ConfigSchema::$singleton;
-    }
-
-    /**
-     * Defines a directive for configuration
-     * @warning Will fail of directive's namespace is defined.
-     * @warning This method's signature is slightly different from the legacy
-     *          define() static method! Beware!
-     * @param $namespace Namespace the directive is in
-     * @param $name Key of directive
-     * @param $default Default value of directive
-     * @param $type Allowed type of the directive. See
-     *      HTMLPurifier_DirectiveDef::$type for allowed values
-     * @param $allow_null Whether or not to allow null values
-     */
-    public function add($key, $default, $type, $allow_null) {
-        $obj = new stdclass();
-        $obj->type = is_int($type) ? $type : HTMLPurifier_VarParser::$types[$type];
-        if ($allow_null) $obj->allow_null = true;
-        $this->info[$key] = $obj;
-        $this->defaults[$key] = $default;
-        $this->defaultPlist->set($key, $default);
-    }
-
-    /**
-     * Defines a directive value alias.
-     *
-     * Directive value aliases are convenient for developers because it lets
-     * them set a directive to several values and get the same result.
-     * @param $namespace Directive's namespace
-     * @param $name Name of Directive
-     * @param $aliases Hash of aliased values to the real alias
-     */
-    public function addValueAliases($key, $aliases) {
-        if (!isset($this->info[$key]->aliases)) {
-            $this->info[$key]->aliases = array();
-        }
-        foreach ($aliases as $alias => $real) {
-            $this->info[$key]->aliases[$alias] = $real;
-        }
-    }
-
-    /**
-     * Defines a set of allowed values for a directive.
-     * @warning This is slightly different from the corresponding static
-     *          method definition.
-     * @param $namespace Namespace of directive
-     * @param $name Name of directive
-     * @param $allowed Lookup array of allowed values
-     */
-    public function addAllowedValues($key, $allowed) {
-        $this->info[$key]->allowed = $allowed;
-    }
-
-    /**
-     * Defines a directive alias for backwards compatibility
-     * @param $namespace
-     * @param $name Directive that will be aliased
-     * @param $new_namespace
-     * @param $new_name Directive that the alias will be to
-     */
-    public function addAlias($key, $new_key) {
-        $obj = new stdclass;
-        $obj->key = $new_key;
-        $obj->isAlias = true;
-        $this->info[$key] = $obj;
-    }
-
-    /**
-     * Replaces any stdclass that only has the type property with type integer.
-     */
-    public function postProcess() {
-        foreach ($this->info as $key => $v) {
-            if (count((array) $v) == 1) {
-                $this->info[$key] = $v->type;
-            } elseif (count((array) $v) == 2 && isset($v->allow_null)) {
-                $this->info[$key] = -$v->type;
-            }
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Builder/ConfigSchema.php b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Builder/ConfigSchema.php
deleted file mode 100644
index c05668a706..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Builder/ConfigSchema.php
+++ /dev/null
@@ -1,44 +0,0 @@
-<?php
-
-/**
- * Converts HTMLPurifier_ConfigSchema_Interchange to our runtime
- * representation used to perform checks on user configuration.
- */
-class HTMLPurifier_ConfigSchema_Builder_ConfigSchema
-{
-
-    public function build($interchange) {
-        $schema = new HTMLPurifier_ConfigSchema();
-        foreach ($interchange->directives as $d) {
-            $schema->add(
-                $d->id->key,
-                $d->default,
-                $d->type,
-                $d->typeAllowsNull
-            );
-            if ($d->allowed !== null) {
-                $schema->addAllowedValues(
-                    $d->id->key,
-                    $d->allowed
-                );
-            }
-            foreach ($d->aliases as $alias) {
-                $schema->addAlias(
-                    $alias->key,
-                    $d->id->key
-                );
-            }
-            if ($d->valueAliases !== null) {
-                $schema->addValueAliases(
-                    $d->id->key,
-                    $d->valueAliases
-                );
-            }
-        }
-        $schema->postProcess();
-        return $schema;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Builder/Xml.php b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Builder/Xml.php
deleted file mode 100644
index 244561a372..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Builder/Xml.php
+++ /dev/null
@@ -1,106 +0,0 @@
-<?php
-
-/**
- * Converts HTMLPurifier_ConfigSchema_Interchange to an XML format,
- * which can be further processed to generate documentation.
- */
-class HTMLPurifier_ConfigSchema_Builder_Xml extends XMLWriter
-{
-
-    protected $interchange;
-    private $namespace;
-
-    protected function writeHTMLDiv($html) {
-        $this->startElement('div');
-
-        $purifier = HTMLPurifier::getInstance();
-        $html = $purifier->purify($html);
-        $this->writeAttribute('xmlns', 'http://www.w3.org/1999/xhtml');
-        $this->writeRaw($html);
-
-        $this->endElement(); // div
-    }
-
-    protected function export($var) {
-        if ($var === array()) return 'array()';
-        return var_export($var, true);
-    }
-
-    public function build($interchange) {
-        // global access, only use as last resort
-        $this->interchange = $interchange;
-
-        $this->setIndent(true);
-        $this->startDocument('1.0', 'UTF-8');
-        $this->startElement('configdoc');
-        $this->writeElement('title', $interchange->name);
-
-        foreach ($interchange->directives as $directive) {
-            $this->buildDirective($directive);
-        }
-
-        if ($this->namespace) $this->endElement(); // namespace
-
-        $this->endElement(); // configdoc
-        $this->flush();
-    }
-
-    public function buildDirective($directive) {
-
-        // Kludge, although I suppose having a notion of a "root namespace"
-        // certainly makes things look nicer when documentation is built.
-        // Depends on things being sorted.
-        if (!$this->namespace || $this->namespace !== $directive->id->getRootNamespace()) {
-            if ($this->namespace) $this->endElement(); // namespace
-            $this->namespace = $directive->id->getRootNamespace();
-            $this->startElement('namespace');
-            $this->writeAttribute('id', $this->namespace);
-            $this->writeElement('name', $this->namespace);
-        }
-
-        $this->startElement('directive');
-        $this->writeAttribute('id', $directive->id->toString());
-
-        $this->writeElement('name', $directive->id->getDirective());
-
-        $this->startElement('aliases');
-            foreach ($directive->aliases as $alias) $this->writeElement('alias', $alias->toString());
-        $this->endElement(); // aliases
-
-        $this->startElement('constraints');
-            if ($directive->version) $this->writeElement('version', $directive->version);
-            $this->startElement('type');
-                if ($directive->typeAllowsNull) $this->writeAttribute('allow-null', 'yes');
-                $this->text($directive->type);
-            $this->endElement(); // type
-            if ($directive->allowed) {
-                $this->startElement('allowed');
-                    foreach ($directive->allowed as $value => $x) $this->writeElement('value', $value);
-                $this->endElement(); // allowed
-            }
-            $this->writeElement('default', $this->export($directive->default));
-            $this->writeAttribute('xml:space', 'preserve');
-            if ($directive->external) {
-                $this->startElement('external');
-                    foreach ($directive->external as $project) $this->writeElement('project', $project);
-                $this->endElement();
-            }
-        $this->endElement(); // constraints
-
-        if ($directive->deprecatedVersion) {
-            $this->startElement('deprecated');
-                $this->writeElement('version', $directive->deprecatedVersion);
-                $this->writeElement('use', $directive->deprecatedUse->toString());
-            $this->endElement(); // deprecated
-        }
-
-        $this->startElement('description');
-            $this->writeHTMLDiv($directive->description);
-        $this->endElement(); // description
-
-        $this->endElement(); // directive
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Exception.php b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Exception.php
deleted file mode 100644
index 2671516c58..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Exception.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-/**
- * Exceptions related to configuration schema
- */
-class HTMLPurifier_ConfigSchema_Exception extends HTMLPurifier_Exception
-{
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Interchange.php b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Interchange.php
deleted file mode 100644
index 91a5aa7303..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Interchange.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-
-/**
- * Generic schema interchange format that can be converted to a runtime
- * representation (HTMLPurifier_ConfigSchema) or HTML documentation. Members
- * are completely validated.
- */
-class HTMLPurifier_ConfigSchema_Interchange
-{
-
-    /**
-     * Name of the application this schema is describing.
-     */
-    public $name;
-
-    /**
-     * Array of Directive ID => array(directive info)
-     */
-    public $directives = array();
-
-    /**
-     * Adds a directive array to $directives
-     */
-    public function addDirective($directive) {
-        if (isset($this->directives[$i = $directive->id->toString()])) {
-            throw new HTMLPurifier_ConfigSchema_Exception("Cannot redefine directive '$i'");
-        }
-        $this->directives[$i] = $directive;
-    }
-
-    /**
-     * Convenience function to perform standard validation. Throws exception
-     * on failed validation.
-     */
-    public function validate() {
-        $validator = new HTMLPurifier_ConfigSchema_Validator();
-        return $validator->validate($this);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Interchange/Directive.php b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Interchange/Directive.php
deleted file mode 100644
index ac8be0d970..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Interchange/Directive.php
+++ /dev/null
@@ -1,77 +0,0 @@
-<?php
-
-/**
- * Interchange component class describing configuration directives.
- */
-class HTMLPurifier_ConfigSchema_Interchange_Directive
-{
-
-    /**
-     * ID of directive, instance of HTMLPurifier_ConfigSchema_Interchange_Id.
-     */
-    public $id;
-
-    /**
-     * String type, e.g. 'integer' or 'istring'.
-     */
-    public $type;
-
-    /**
-     * Default value, e.g. 3 or 'DefaultVal'.
-     */
-    public $default;
-
-    /**
-     * HTML description.
-     */
-    public $description;
-
-    /**
-     * Boolean whether or not null is allowed as a value.
-     */
-    public $typeAllowsNull = false;
-
-    /**
-     * Lookup table of allowed scalar values, e.g. array('allowed' => true).
-     * Null if all values are allowed.
-     */
-    public $allowed;
-
-    /**
-     * List of aliases for the directive,
-     * e.g. array(new HTMLPurifier_ConfigSchema_Interchange_Id('Ns', 'Dir'))).
-     */
-    public $aliases = array();
-
-    /**
-     * Hash of value aliases, e.g. array('alt' => 'real'). Null if value
-     * aliasing is disabled (necessary for non-scalar types).
-     */
-    public $valueAliases;
-
-    /**
-     * Version of HTML Purifier the directive was introduced, e.g. '1.3.1'.
-     * Null if the directive has always existed.
-     */
-    public $version;
-
-    /**
-     * ID of directive that supercedes this old directive, is an instance
-     * of HTMLPurifier_ConfigSchema_Interchange_Id. Null if not deprecated.
-     */
-    public $deprecatedUse;
-
-    /**
-     * Version of HTML Purifier this directive was deprecated. Null if not
-     * deprecated.
-     */
-    public $deprecatedVersion;
-
-    /**
-     * List of external projects this directive depends on, e.g. array('CSSTidy').
-     */
-    public $external = array();
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Interchange/Id.php b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Interchange/Id.php
deleted file mode 100644
index b9b3c6f5cf..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Interchange/Id.php
+++ /dev/null
@@ -1,37 +0,0 @@
-<?php
-
-/**
- * Represents a directive ID in the interchange format.
- */
-class HTMLPurifier_ConfigSchema_Interchange_Id
-{
-
-    public $key;
-
-    public function __construct($key) {
-        $this->key = $key;
-    }
-
-    /**
-     * @warning This is NOT magic, to ensure that people don't abuse SPL and
-     *          cause problems for PHP 5.0 support.
-     */
-    public function toString() {
-        return $this->key;
-    }
-
-    public function getRootNamespace() {
-        return substr($this->key, 0, strpos($this->key, "."));
-    }
-
-    public function getDirective() {
-        return substr($this->key, strpos($this->key, ".") + 1);
-    }
-
-    public static function make($id) {
-        return new HTMLPurifier_ConfigSchema_Interchange_Id($id);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/InterchangeBuilder.php b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/InterchangeBuilder.php
deleted file mode 100644
index 785b72ce8e..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/InterchangeBuilder.php
+++ /dev/null
@@ -1,180 +0,0 @@
-<?php
-
-class HTMLPurifier_ConfigSchema_InterchangeBuilder
-{
-
-    /**
-     * Used for processing DEFAULT, nothing else.
-     */
-    protected $varParser;
-
-    public function __construct($varParser = null) {
-        $this->varParser = $varParser ? $varParser : new HTMLPurifier_VarParser_Native();
-    }
-
-    public static function buildFromDirectory($dir = null) {
-        $builder     = new HTMLPurifier_ConfigSchema_InterchangeBuilder();
-        $interchange = new HTMLPurifier_ConfigSchema_Interchange();
-        return $builder->buildDir($interchange, $dir);
-    }
-
-    public function buildDir($interchange, $dir = null) {
-        if (!$dir) $dir = HTMLPURIFIER_PREFIX . '/HTMLPurifier/ConfigSchema/schema';
-        if (file_exists($dir . '/info.ini')) {
-            $info = parse_ini_file($dir . '/info.ini');
-            $interchange->name = $info['name'];
-        }
-
-        $files = array();
-        $dh = opendir($dir);
-        while (false !== ($file = readdir($dh))) {
-            if (!$file || $file[0] == '.' || strrchr($file, '.') !== '.txt') {
-                continue;
-            }
-            $files[] = $file;
-        }
-        closedir($dh);
-
-        sort($files);
-        foreach ($files as $file) {
-            $this->buildFile($interchange, $dir . '/' . $file);
-        }
-
-        return $interchange;
-    }
-
-    public function buildFile($interchange, $file) {
-        $parser = new HTMLPurifier_StringHashParser();
-        $this->build(
-            $interchange,
-            new HTMLPurifier_StringHash( $parser->parseFile($file) )
-        );
-    }
-
-    /**
-     * Builds an interchange object based on a hash.
-     * @param $interchange HTMLPurifier_ConfigSchema_Interchange object to build
-     * @param $hash HTMLPurifier_ConfigSchema_StringHash source data
-     */
-    public function build($interchange, $hash) {
-        if (!$hash instanceof HTMLPurifier_StringHash) {
-            $hash = new HTMLPurifier_StringHash($hash);
-        }
-        if (!isset($hash['ID'])) {
-            throw new HTMLPurifier_ConfigSchema_Exception('Hash does not have any ID');
-        }
-        if (strpos($hash['ID'], '.') === false) {
-            if (count($hash) == 2 && isset($hash['DESCRIPTION'])) {
-                $hash->offsetGet('DESCRIPTION'); // prevent complaining
-            } else {
-                throw new HTMLPurifier_ConfigSchema_Exception('All directives must have a namespace');
-            }
-        } else {
-            $this->buildDirective($interchange, $hash);
-        }
-        $this->_findUnused($hash);
-    }
-
-    public function buildDirective($interchange, $hash) {
-        $directive = new HTMLPurifier_ConfigSchema_Interchange_Directive();
-
-        // These are required elements:
-        $directive->id = $this->id($hash->offsetGet('ID'));
-        $id = $directive->id->toString(); // convenience
-
-        if (isset($hash['TYPE'])) {
-            $type = explode('/', $hash->offsetGet('TYPE'));
-            if (isset($type[1])) $directive->typeAllowsNull = true;
-            $directive->type = $type[0];
-        } else {
-            throw new HTMLPurifier_ConfigSchema_Exception("TYPE in directive hash '$id' not defined");
-        }
-
-        if (isset($hash['DEFAULT'])) {
-            try {
-                $directive->default = $this->varParser->parse($hash->offsetGet('DEFAULT'), $directive->type, $directive->typeAllowsNull);
-            } catch (HTMLPurifier_VarParserException $e) {
-                throw new HTMLPurifier_ConfigSchema_Exception($e->getMessage() . " in DEFAULT in directive hash '$id'");
-            }
-        }
-
-        if (isset($hash['DESCRIPTION'])) {
-            $directive->description = $hash->offsetGet('DESCRIPTION');
-        }
-
-        if (isset($hash['ALLOWED'])) {
-            $directive->allowed = $this->lookup($this->evalArray($hash->offsetGet('ALLOWED')));
-        }
-
-        if (isset($hash['VALUE-ALIASES'])) {
-            $directive->valueAliases = $this->evalArray($hash->offsetGet('VALUE-ALIASES'));
-        }
-
-        if (isset($hash['ALIASES'])) {
-            $raw_aliases = trim($hash->offsetGet('ALIASES'));
-            $aliases = preg_split('/\s*,\s*/', $raw_aliases);
-            foreach ($aliases as $alias) {
-                $directive->aliases[] = $this->id($alias);
-            }
-        }
-
-        if (isset($hash['VERSION'])) {
-            $directive->version = $hash->offsetGet('VERSION');
-        }
-
-        if (isset($hash['DEPRECATED-USE'])) {
-            $directive->deprecatedUse = $this->id($hash->offsetGet('DEPRECATED-USE'));
-        }
-
-        if (isset($hash['DEPRECATED-VERSION'])) {
-            $directive->deprecatedVersion = $hash->offsetGet('DEPRECATED-VERSION');
-        }
-
-        if (isset($hash['EXTERNAL'])) {
-            $directive->external = preg_split('/\s*,\s*/', trim($hash->offsetGet('EXTERNAL')));
-        }
-
-        $interchange->addDirective($directive);
-    }
-
-    /**
-     * Evaluates an array PHP code string without array() wrapper
-     */
-    protected function evalArray($contents) {
-        return eval('return array('. $contents .');');
-    }
-
-    /**
-     * Converts an array list into a lookup array.
-     */
-    protected function lookup($array) {
-        $ret = array();
-        foreach ($array as $val) $ret[$val] = true;
-        return $ret;
-    }
-
-    /**
-     * Convenience function that creates an HTMLPurifier_ConfigSchema_Interchange_Id
-     * object based on a string Id.
-     */
-    protected function id($id) {
-        return HTMLPurifier_ConfigSchema_Interchange_Id::make($id);
-    }
-
-    /**
-     * Triggers errors for any unused keys passed in the hash; such keys
-     * may indicate typos, missing values, etc.
-     * @param $hash Instance of ConfigSchema_StringHash to check.
-     */
-    protected function _findUnused($hash) {
-        $accessed = $hash->getAccessed();
-        foreach ($hash as $k => $v) {
-            if (!isset($accessed[$k])) {
-                trigger_error("String hash key '$k' not used by builder", E_USER_NOTICE);
-            }
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Validator.php b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Validator.php
deleted file mode 100644
index f374f6a022..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/Validator.php
+++ /dev/null
@@ -1,206 +0,0 @@
-<?php
-
-/**
- * Performs validations on HTMLPurifier_ConfigSchema_Interchange
- *
- * @note If you see '// handled by InterchangeBuilder', that means a
- *       design decision in that class would prevent this validation from
- *       ever being necessary. We have them anyway, however, for
- *       redundancy.
- */
-class HTMLPurifier_ConfigSchema_Validator
-{
-
-    /**
-     * Easy to access global objects.
-     */
-    protected $interchange, $aliases;
-
-    /**
-     * Context-stack to provide easy to read error messages.
-     */
-    protected $context = array();
-
-    /**
-     * HTMLPurifier_VarParser to test default's type.
-     */
-    protected $parser;
-
-    public function __construct() {
-        $this->parser = new HTMLPurifier_VarParser();
-    }
-
-    /**
-     * Validates a fully-formed interchange object. Throws an
-     * HTMLPurifier_ConfigSchema_Exception if there's a problem.
-     */
-    public function validate($interchange) {
-        $this->interchange = $interchange;
-        $this->aliases = array();
-        // PHP is a bit lax with integer <=> string conversions in
-        // arrays, so we don't use the identical !== comparison
-        foreach ($interchange->directives as $i => $directive) {
-            $id = $directive->id->toString();
-            if ($i != $id) $this->error(false, "Integrity violation: key '$i' does not match internal id '$id'");
-            $this->validateDirective($directive);
-        }
-        return true;
-    }
-
-    /**
-     * Validates a HTMLPurifier_ConfigSchema_Interchange_Id object.
-     */
-    public function validateId($id) {
-        $id_string = $id->toString();
-        $this->context[] = "id '$id_string'";
-        if (!$id instanceof HTMLPurifier_ConfigSchema_Interchange_Id) {
-            // handled by InterchangeBuilder
-            $this->error(false, 'is not an instance of HTMLPurifier_ConfigSchema_Interchange_Id');
-        }
-        // keys are now unconstrained (we might want to narrow down to A-Za-z0-9.)
-        // we probably should check that it has at least one namespace
-        $this->with($id, 'key')
-            ->assertNotEmpty()
-            ->assertIsString(); // implicit assertIsString handled by InterchangeBuilder
-        array_pop($this->context);
-    }
-
-    /**
-     * Validates a HTMLPurifier_ConfigSchema_Interchange_Directive object.
-     */
-    public function validateDirective($d) {
-        $id = $d->id->toString();
-        $this->context[] = "directive '$id'";
-        $this->validateId($d->id);
-
-        $this->with($d, 'description')
-            ->assertNotEmpty();
-
-        // BEGIN - handled by InterchangeBuilder
-        $this->with($d, 'type')
-            ->assertNotEmpty();
-        $this->with($d, 'typeAllowsNull')
-            ->assertIsBool();
-        try {
-            // This also tests validity of $d->type
-            $this->parser->parse($d->default, $d->type, $d->typeAllowsNull);
-        } catch (HTMLPurifier_VarParserException $e) {
-            $this->error('default', 'had error: ' . $e->getMessage());
-        }
-        // END - handled by InterchangeBuilder
-
-        if (!is_null($d->allowed) || !empty($d->valueAliases)) {
-            // allowed and valueAliases require that we be dealing with
-            // strings, so check for that early.
-            $d_int = HTMLPurifier_VarParser::$types[$d->type];
-            if (!isset(HTMLPurifier_VarParser::$stringTypes[$d_int])) {
-                $this->error('type', 'must be a string type when used with allowed or value aliases');
-            }
-        }
-
-        $this->validateDirectiveAllowed($d);
-        $this->validateDirectiveValueAliases($d);
-        $this->validateDirectiveAliases($d);
-
-        array_pop($this->context);
-    }
-
-    /**
-     * Extra validation if $allowed member variable of
-     * HTMLPurifier_ConfigSchema_Interchange_Directive is defined.
-     */
-    public function validateDirectiveAllowed($d) {
-        if (is_null($d->allowed)) return;
-        $this->with($d, 'allowed')
-            ->assertNotEmpty()
-            ->assertIsLookup(); // handled by InterchangeBuilder
-        if (is_string($d->default) && !isset($d->allowed[$d->default])) {
-            $this->error('default', 'must be an allowed value');
-        }
-        $this->context[] = 'allowed';
-        foreach ($d->allowed as $val => $x) {
-            if (!is_string($val)) $this->error("value $val", 'must be a string');
-        }
-        array_pop($this->context);
-    }
-
-    /**
-     * Extra validation if $valueAliases member variable of
-     * HTMLPurifier_ConfigSchema_Interchange_Directive is defined.
-     */
-    public function validateDirectiveValueAliases($d) {
-        if (is_null($d->valueAliases)) return;
-        $this->with($d, 'valueAliases')
-            ->assertIsArray(); // handled by InterchangeBuilder
-        $this->context[] = 'valueAliases';
-        foreach ($d->valueAliases as $alias => $real) {
-            if (!is_string($alias)) $this->error("alias $alias", 'must be a string');
-            if (!is_string($real))  $this->error("alias target $real from alias '$alias'",  'must be a string');
-            if ($alias === $real) {
-                $this->error("alias '$alias'", "must not be an alias to itself");
-            }
-        }
-        if (!is_null($d->allowed)) {
-            foreach ($d->valueAliases as $alias => $real) {
-                if (isset($d->allowed[$alias])) {
-                    $this->error("alias '$alias'", 'must not be an allowed value');
-                } elseif (!isset($d->allowed[$real])) {
-                    $this->error("alias '$alias'", 'must be an alias to an allowed value');
-                }
-            }
-        }
-        array_pop($this->context);
-    }
-
-    /**
-     * Extra validation if $aliases member variable of
-     * HTMLPurifier_ConfigSchema_Interchange_Directive is defined.
-     */
-    public function validateDirectiveAliases($d) {
-        $this->with($d, 'aliases')
-            ->assertIsArray(); // handled by InterchangeBuilder
-        $this->context[] = 'aliases';
-        foreach ($d->aliases as $alias) {
-            $this->validateId($alias);
-            $s = $alias->toString();
-            if (isset($this->interchange->directives[$s])) {
-                $this->error("alias '$s'", 'collides with another directive');
-            }
-            if (isset($this->aliases[$s])) {
-                $other_directive = $this->aliases[$s];
-                $this->error("alias '$s'", "collides with alias for directive '$other_directive'");
-            }
-            $this->aliases[$s] = $d->id->toString();
-        }
-        array_pop($this->context);
-    }
-
-    // protected helper functions
-
-    /**
-     * Convenience function for generating HTMLPurifier_ConfigSchema_ValidatorAtom
-     * for validating simple member variables of objects.
-     */
-    protected function with($obj, $member) {
-        return new HTMLPurifier_ConfigSchema_ValidatorAtom($this->getFormattedContext(), $obj, $member);
-    }
-
-    /**
-     * Emits an error, providing helpful context.
-     */
-    protected function error($target, $msg) {
-        if ($target !== false) $prefix = ucfirst($target) . ' in ' .  $this->getFormattedContext();
-        else $prefix = ucfirst($this->getFormattedContext());
-        throw new HTMLPurifier_ConfigSchema_Exception(trim($prefix . ' ' . $msg));
-    }
-
-    /**
-     * Returns a formatted context string.
-     */
-    protected function getFormattedContext() {
-        return implode(' in ', array_reverse($this->context));
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/ValidatorAtom.php b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/ValidatorAtom.php
deleted file mode 100644
index b95aea18cc..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/ValidatorAtom.php
+++ /dev/null
@@ -1,66 +0,0 @@
-<?php
-
-/**
- * Fluent interface for validating the contents of member variables.
- * This should be immutable. See HTMLPurifier_ConfigSchema_Validator for
- * use-cases. We name this an 'atom' because it's ONLY for validations that
- * are independent and usually scalar.
- */
-class HTMLPurifier_ConfigSchema_ValidatorAtom
-{
-
-    protected $context, $obj, $member, $contents;
-
-    public function __construct($context, $obj, $member) {
-        $this->context     = $context;
-        $this->obj         = $obj;
-        $this->member      = $member;
-        $this->contents    =& $obj->$member;
-    }
-
-    public function assertIsString() {
-        if (!is_string($this->contents)) $this->error('must be a string');
-        return $this;
-    }
-
-    public function assertIsBool() {
-        if (!is_bool($this->contents)) $this->error('must be a boolean');
-        return $this;
-    }
-
-    public function assertIsArray() {
-        if (!is_array($this->contents)) $this->error('must be an array');
-        return $this;
-    }
-
-    public function assertNotNull() {
-        if ($this->contents === null) $this->error('must not be null');
-        return $this;
-    }
-
-    public function assertAlnum() {
-        $this->assertIsString();
-        if (!ctype_alnum($this->contents)) $this->error('must be alphanumeric');
-        return $this;
-    }
-
-    public function assertNotEmpty() {
-        if (empty($this->contents)) $this->error('must not be empty');
-        return $this;
-    }
-
-    public function assertIsLookup() {
-        $this->assertIsArray();
-        foreach ($this->contents as $v) {
-            if ($v !== true) $this->error('must be a lookup array');
-        }
-        return $this;
-    }
-
-    protected function error($msg) {
-        throw new HTMLPurifier_ConfigSchema_Exception(ucfirst($this->member) . ' in ' . $this->context . ' ' . $msg);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema.ser b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema.ser
deleted file mode 100644
index bbf12f9c3e7392aa8143727d2485f6f9ad1f97e1..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

literal 12999
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diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.AllowedClasses.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.AllowedClasses.txt
deleted file mode 100644
index 0517fed0a1..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.AllowedClasses.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-Attr.AllowedClasses
-TYPE: lookup/null
-VERSION: 4.0.0
-DEFAULT: null
---DESCRIPTION--
-List of allowed class values in the class attribute. By default, this is null,
-which means all classes are allowed.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.AllowedFrameTargets.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.AllowedFrameTargets.txt
deleted file mode 100644
index 249edd647b..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.AllowedFrameTargets.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-Attr.AllowedFrameTargets
-TYPE: lookup
-DEFAULT: array()
---DESCRIPTION--
-Lookup table of all allowed link frame targets.  Some commonly used link
-targets include _blank, _self, _parent and _top. Values should be
-lowercase, as validation will be done in a case-sensitive manner despite
-W3C's recommendation. XHTML 1.0 Strict does not permit the target attribute
-so this directive will have no effect in that doctype. XHTML 1.1 does not
-enable the Target module by default, you will have to manually enable it
-(see the module documentation for more details.)
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRel.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRel.txt
deleted file mode 100644
index 9a8fa6a2e2..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRel.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-Attr.AllowedRel
-TYPE: lookup
-VERSION: 1.6.0
-DEFAULT: array()
---DESCRIPTION--
-List of allowed forward document relationships in the rel attribute. Common
-values may be nofollow or print. By default, this is empty, meaning that no
-document relationships are allowed.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRev.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRev.txt
deleted file mode 100644
index b017883485..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.AllowedRev.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-Attr.AllowedRev
-TYPE: lookup
-VERSION: 1.6.0
-DEFAULT: array()
---DESCRIPTION--
-List of allowed reverse document relationships in the rev attribute. This
-attribute is a bit of an edge-case; if you don't know what it is for, stay
-away.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.ClassUseCDATA.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.ClassUseCDATA.txt
deleted file mode 100644
index e774b823b1..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.ClassUseCDATA.txt
+++ /dev/null
@@ -1,19 +0,0 @@
-Attr.ClassUseCDATA
-TYPE: bool/null
-DEFAULT: null
-VERSION: 4.0.0
---DESCRIPTION--
-If null, class will auto-detect the doctype and, if matching XHTML 1.1 or
-XHTML 2.0, will use the restrictive NMTOKENS specification of class. Otherwise,
-it will use a relaxed CDATA definition.  If true, the relaxed CDATA definition
-is forced; if false, the NMTOKENS definition is forced.  To get behavior
-of HTML Purifier prior to 4.0.0, set this directive to false.
-
-Some rational behind the auto-detection:
-in previous versions of HTML Purifier, it was assumed that the form of
-class was NMTOKENS, as specified by the XHTML Modularization (representing
-XHTML 1.1 and XHTML 2.0).  The DTDs for HTML 4.01 and XHTML 1.0, however
-specify class as CDATA.  HTML 5 effectively defines it as CDATA, but
-with the additional constraint that each name should be unique (this is not
-explicitly outlined in previous specifications).
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.DefaultImageAlt.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.DefaultImageAlt.txt
deleted file mode 100644
index 533165e175..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.DefaultImageAlt.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-Attr.DefaultImageAlt
-TYPE: string/null
-DEFAULT: null
-VERSION: 3.2.0
---DESCRIPTION--
-This is the content of the alt tag of an image if the user had not
-previously specified an alt attribute.  This applies to all images without
-a valid alt attribute, as opposed to %Attr.DefaultInvalidImageAlt, which
-only applies to invalid images, and overrides in the case of an invalid image.
-Default behavior with null is to use the basename of the src tag for the alt.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImage.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImage.txt
deleted file mode 100644
index 9eb7e38469..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImage.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-Attr.DefaultInvalidImage
-TYPE: string
-DEFAULT: ''
---DESCRIPTION--
-This is the default image an img tag will be pointed to if it does not have
-a valid src attribute.  In future versions, we may allow the image tag to
-be removed completely, but due to design issues, this is not possible right
-now.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImageAlt.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImageAlt.txt
deleted file mode 100644
index 2f17bf477a..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.DefaultInvalidImageAlt.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-Attr.DefaultInvalidImageAlt
-TYPE: string
-DEFAULT: 'Invalid image'
---DESCRIPTION--
-This is the content of the alt tag of an invalid image if the user had not
-previously specified an alt attribute.  It has no effect when the image is
-valid but there was no alt attribute present.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.DefaultTextDir.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.DefaultTextDir.txt
deleted file mode 100644
index 52654b53ae..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.DefaultTextDir.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-Attr.DefaultTextDir
-TYPE: string
-DEFAULT: 'ltr'
---DESCRIPTION--
-Defines the default text direction (ltr or rtl) of the document being
-parsed.  This generally is the same as the value of the dir attribute in
-HTML, or ltr if that is not specified.
---ALLOWED--
-'ltr', 'rtl'
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.EnableID.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.EnableID.txt
deleted file mode 100644
index 6440d21032..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.EnableID.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-Attr.EnableID
-TYPE: bool
-DEFAULT: false
-VERSION: 1.2.0
---DESCRIPTION--
-Allows the ID attribute in HTML.  This is disabled by default due to the
-fact that without proper configuration user input can easily break the
-validation of a webpage by specifying an ID that is already on the
-surrounding HTML.  If you don't mind throwing caution to the wind, enable
-this directive, but I strongly recommend you also consider blacklisting IDs
-you use (%Attr.IDBlacklist) or prefixing all user supplied IDs
-(%Attr.IDPrefix).  When set to true HTML Purifier reverts to the behavior of
-pre-1.2.0 versions.
---ALIASES--
-HTML.EnableAttrID
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.ForbiddenClasses.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.ForbiddenClasses.txt
deleted file mode 100644
index f31d226f58..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.ForbiddenClasses.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-Attr.ForbiddenClasses
-TYPE: lookup
-VERSION: 4.0.0
-DEFAULT: array()
---DESCRIPTION--
-List of forbidden class values in the class attribute. By default, this is
-empty, which means that no classes are forbidden. See also %Attr.AllowedClasses.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklist.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklist.txt
deleted file mode 100644
index 5f2b5e3d2c..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklist.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-Attr.IDBlacklist
-TYPE: list
-DEFAULT: array()
-DESCRIPTION: Array of IDs not allowed in the document.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklistRegexp.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklistRegexp.txt
deleted file mode 100644
index 6f5824586e..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.IDBlacklistRegexp.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-Attr.IDBlacklistRegexp
-TYPE: string/null
-VERSION: 1.6.0
-DEFAULT: NULL
---DESCRIPTION--
-PCRE regular expression to be matched against all IDs. If the expression is
-matches, the ID is rejected. Use this with care: may cause significant
-degradation. ID matching is done after all other validation.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefix.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefix.txt
deleted file mode 100644
index cc49d43fd0..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefix.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-Attr.IDPrefix
-TYPE: string
-VERSION: 1.2.0
-DEFAULT: ''
---DESCRIPTION--
-String to prefix to IDs.  If you have no idea what IDs your pages may use,
-you may opt to simply add a prefix to all user-submitted ID attributes so
-that they are still usable, but will not conflict with core page IDs.
-Example: setting the directive to 'user_' will result in a user submitted
-'foo' to become 'user_foo'  Be sure to set %HTML.EnableAttrID to true
-before using this.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefixLocal.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefixLocal.txt
deleted file mode 100644
index 2c5924a7ad..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Attr.IDPrefixLocal.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-Attr.IDPrefixLocal
-TYPE: string
-VERSION: 1.2.0
-DEFAULT: ''
---DESCRIPTION--
-Temporary prefix for IDs used in conjunction with %Attr.IDPrefix.  If you
-need to allow multiple sets of user content on web page, you may need to
-have a seperate prefix that changes with each iteration.  This way,
-seperately submitted user content displayed on the same page doesn't
-clobber each other. Ideal values are unique identifiers for the content it
-represents (i.e. the id of the row in the database). Be sure to add a
-seperator (like an underscore) at the end.  Warning: this directive will
-not work unless %Attr.IDPrefix is set to a non-empty value!
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.AutoParagraph.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.AutoParagraph.txt
deleted file mode 100644
index d5caa1bb97..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.AutoParagraph.txt
+++ /dev/null
@@ -1,31 +0,0 @@
-AutoFormat.AutoParagraph
-TYPE: bool
-VERSION: 2.0.1
-DEFAULT: false
---DESCRIPTION--
-
-<p>
-  This directive turns on auto-paragraphing, where double newlines are
-  converted in to paragraphs whenever possible. Auto-paragraphing:
-</p>
-<ul>
-  <li>Always applies to inline elements or text in the root node,</li>
-  <li>Applies to inline elements or text with double newlines in nodes
-      that allow paragraph tags,</li>
-  <li>Applies to double newlines in paragraph tags</li>
-</ul>
-<p>
-  <code>p</code> tags must be allowed for this directive to take effect.
-  We do not use <code>br</code> tags for paragraphing, as that is
-  semantically incorrect.
-</p>
-<p>
-  To prevent auto-paragraphing as a content-producer, refrain from using
-  double-newlines except to specify a new paragraph or in contexts where
-  it has special meaning (whitespace usually has no meaning except in
-  tags like <code>pre</code>, so this should not be difficult.) To prevent
-  the paragraphing of inline text adjacent to block elements, wrap them
-  in <code>div</code> tags (the behavior is slightly different outside of
-  the root node.)
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.Custom.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.Custom.txt
deleted file mode 100644
index 2a476481af..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.Custom.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-AutoFormat.Custom
-TYPE: list
-VERSION: 2.0.1
-DEFAULT: array()
---DESCRIPTION--
-
-<p>
-  This directive can be used to add custom auto-format injectors.
-  Specify an array of injector names (class name minus the prefix)
-  or concrete implementations. Injector class must exist.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.DisplayLinkURI.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.DisplayLinkURI.txt
deleted file mode 100644
index 663064a344..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.DisplayLinkURI.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-AutoFormat.DisplayLinkURI
-TYPE: bool
-VERSION: 3.2.0
-DEFAULT: false
---DESCRIPTION--
-<p>
-  This directive turns on the in-text display of URIs in &lt;a&gt; tags, and disables
-  those links. For example, <a href="http://example.com">example</a> becomes
-  example (<a>http://example.com</a>).
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.Linkify.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.Linkify.txt
deleted file mode 100644
index 3a48ba960e..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.Linkify.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-AutoFormat.Linkify
-TYPE: bool
-VERSION: 2.0.1
-DEFAULT: false
---DESCRIPTION--
-
-<p>
-  This directive turns on linkification, auto-linking http, ftp and
-  https URLs. <code>a</code> tags with the <code>href</code> attribute
-  must be allowed.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.DocURL.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.DocURL.txt
deleted file mode 100644
index db58b13464..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.DocURL.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-AutoFormat.PurifierLinkify.DocURL
-TYPE: string
-VERSION: 2.0.1
-DEFAULT: '#%s'
-ALIASES: AutoFormatParam.PurifierLinkifyDocURL
---DESCRIPTION--
-<p>
-  Location of configuration documentation to link to, let %s substitute
-  into the configuration's namespace and directive names sans the percent
-  sign.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.txt
deleted file mode 100644
index 7996488be0..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.PurifierLinkify.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-AutoFormat.PurifierLinkify
-TYPE: bool
-VERSION: 2.0.1
-DEFAULT: false
---DESCRIPTION--
-
-<p>
-  Internal auto-formatter that converts configuration directives in
-  syntax <a>%Namespace.Directive</a> to links. <code>a</code> tags
-  with the <code>href</code> attribute must be allowed.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions.txt
deleted file mode 100644
index 35c393b4e6..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions
-TYPE: lookup
-VERSION: 4.0.0
-DEFAULT: array('td' => true, 'th' => true)
---DESCRIPTION--
-<p>
-  When %AutoFormat.RemoveEmpty and %AutoFormat.RemoveEmpty.RemoveNbsp
-  are enabled, this directive defines what HTML elements should not be
-  removede if they have only a non-breaking space in them.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.txt
deleted file mode 100644
index ca17eb1dc4..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.RemoveNbsp.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-AutoFormat.RemoveEmpty.RemoveNbsp
-TYPE: bool
-VERSION: 4.0.0
-DEFAULT: false
---DESCRIPTION--
-<p>
-  When enabled, HTML Purifier will treat any elements that contain only
-  non-breaking spaces as well as regular whitespace as empty, and remove
-  them when %AutoForamt.RemoveEmpty is enabled.
-</p>
-<p>
-  See %AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions for a list of elements
-  that don't have this behavior applied to them.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.txt
deleted file mode 100644
index 34657ba47b..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/AutoFormat.RemoveEmpty.txt
+++ /dev/null
@@ -1,46 +0,0 @@
-AutoFormat.RemoveEmpty
-TYPE: bool
-VERSION: 3.2.0
-DEFAULT: false
---DESCRIPTION--
-<p>
-  When enabled, HTML Purifier will attempt to remove empty elements that
-  contribute no semantic information to the document. The following types
-  of nodes will be removed:
-</p>
-<ul><li>
-    Tags with no attributes and no content, and that are not empty
-    elements (remove <code>&lt;a&gt;&lt;/a&gt;</code> but not
-    <code>&lt;br /&gt;</code>), and
-  </li>
-  <li>
-    Tags with no content, except for:<ul>
-      <li>The <code>colgroup</code> element, or</li>
-      <li>
-        Elements with the <code>id</code> or <code>name</code> attribute,
-        when those attributes are permitted on those elements.
-      </li>
-    </ul></li>
-</ul>
-<p>
-  Please be very careful when using this functionality; while it may not
-  seem that empty elements contain useful information, they can alter the
-  layout of a document given appropriate styling. This directive is most
-  useful when you are processing machine-generated HTML, please avoid using
-  it on regular user HTML.
-</p>
-<p>
-  Elements that contain only whitespace will be treated as empty. Non-breaking
-  spaces, however, do not count as whitespace. See
-  %AutoFormat.RemoveEmpty.RemoveNbsp for alternate behavior.
-</p>
-<p>
-  This algorithm is not perfect; you may still notice some empty tags,
-  particularly if a node had elements, but those elements were later removed
-  because they were not permitted in that context, or tags that, after
-  being auto-closed by another tag, where empty. This is for safety reasons
-  to prevent clever code from breaking validation. The general rule of thumb:
-  if a tag looked empty on the way in, it will get removed; if HTML Purifier
-  made it empty, it will stay.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.AllowImportant.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.AllowImportant.txt
deleted file mode 100644
index b324608f76..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.AllowImportant.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-CSS.AllowImportant
-TYPE: bool
-DEFAULT: false
-VERSION: 3.1.0
---DESCRIPTION--
-This parameter determines whether or not !important cascade modifiers should
-be allowed in user CSS. If false, !important will stripped.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.AllowTricky.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.AllowTricky.txt
deleted file mode 100644
index 748be0eec8..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.AllowTricky.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-CSS.AllowTricky
-TYPE: bool
-DEFAULT: false
-VERSION: 3.1.0
---DESCRIPTION--
-This parameter determines whether or not to allow "tricky" CSS properties and
-values. Tricky CSS properties/values can drastically modify page layout or
-be used for deceptive practices but do not directly constitute a security risk.
-For example, <code>display:none;</code> is considered a tricky property that
-will only be allowed if this directive is set to true.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.AllowedProperties.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.AllowedProperties.txt
deleted file mode 100644
index 460112ebe0..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.AllowedProperties.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-CSS.AllowedProperties
-TYPE: lookup/null
-VERSION: 3.1.0
-DEFAULT: NULL
---DESCRIPTION--
-
-<p>
-    If HTML Purifier's style attributes set is unsatisfactory for your needs,
-    you can overload it with your own list of tags to allow.  Note that this
-    method is subtractive: it does its job by taking away from HTML Purifier
-    usual feature set, so you cannot add an attribute that HTML Purifier never
-    supported in the first place.
-</p>
-<p>
-    <strong>Warning:</strong> If another directive conflicts with the
-    elements here, <em>that</em> directive will win and override.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.DefinitionRev.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.DefinitionRev.txt
deleted file mode 100644
index 5cb7dda3ba..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.DefinitionRev.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-CSS.DefinitionRev
-TYPE: int
-VERSION: 2.0.0
-DEFAULT: 1
---DESCRIPTION--
-
-<p>
-    Revision identifier for your custom definition. See
-    %HTML.DefinitionRev for details.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.MaxImgLength.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.MaxImgLength.txt
deleted file mode 100644
index 7a3291470c..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.MaxImgLength.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-CSS.MaxImgLength
-TYPE: string/null
-DEFAULT: '1200px'
-VERSION: 3.1.1
---DESCRIPTION--
-<p>
- This parameter sets the maximum allowed length on <code>img</code> tags,
- effectively the <code>width</code> and <code>height</code> properties.
- Only absolute units of measurement (in, pt, pc, mm, cm) and pixels (px) are allowed. This is
- in place to prevent imagecrash attacks, disable with null at your own risk.
- This directive is similar to %HTML.MaxImgLength, and both should be
- concurrently edited, although there are
- subtle differences in the input format (the CSS max is a number with
- a unit).
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.Proprietary.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.Proprietary.txt
deleted file mode 100644
index 148eedb8be..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/CSS.Proprietary.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-CSS.Proprietary
-TYPE: bool
-VERSION: 3.0.0
-DEFAULT: false
---DESCRIPTION--
-
-<p>
-    Whether or not to allow safe, proprietary CSS values.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Cache.DefinitionImpl.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Cache.DefinitionImpl.txt
deleted file mode 100644
index c486724c88..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Cache.DefinitionImpl.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-Cache.DefinitionImpl
-TYPE: string/null
-VERSION: 2.0.0
-DEFAULT: 'Serializer'
---DESCRIPTION--
-
-This directive defines which method to use when caching definitions,
-the complex data-type that makes HTML Purifier tick. Set to null
-to disable caching (not recommended, as you will see a definite
-performance degradation).
-
---ALIASES--
-Core.DefinitionCache
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Cache.SerializerPath.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Cache.SerializerPath.txt
deleted file mode 100644
index 54036507d6..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Cache.SerializerPath.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-Cache.SerializerPath
-TYPE: string/null
-VERSION: 2.0.0
-DEFAULT: NULL
---DESCRIPTION--
-
-<p>
-    Absolute path with no trailing slash to store serialized definitions in.
-    Default is within the
-    HTML Purifier library inside DefinitionCache/Serializer. This
-    path must be writable by the webserver.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.AggressivelyFixLt.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.AggressivelyFixLt.txt
deleted file mode 100644
index 568cbf3b32..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.AggressivelyFixLt.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-Core.AggressivelyFixLt
-TYPE: bool
-VERSION: 2.1.0
-DEFAULT: true
---DESCRIPTION--
-<p>
-    This directive enables aggressive pre-filter fixes HTML Purifier can
-    perform in order to ensure that open angled-brackets do not get killed
-    during parsing stage. Enabling this will result in two preg_replace_callback
-    calls and at least two preg_replace calls for every HTML document parsed;
-    if your users make very well-formed HTML, you can set this directive false.
-    This has no effect when DirectLex is used.
-</p>
-<p>
-    <strong>Notice:</strong> This directive's default turned from false to true
-    in HTML Purifier 3.2.0.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.CollectErrors.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.CollectErrors.txt
deleted file mode 100644
index d7317911fa..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.CollectErrors.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-Core.CollectErrors
-TYPE: bool
-VERSION: 2.0.0
-DEFAULT: false
---DESCRIPTION--
-
-Whether or not to collect errors found while filtering the document. This
-is a useful way to give feedback to your users. <strong>Warning:</strong>
-Currently this feature is very patchy and experimental, with lots of
-possible error messages not yet implemented. It will not cause any
-problems, but it may not help your users either.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.ColorKeywords.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.ColorKeywords.txt
deleted file mode 100644
index 08b381d34c..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.ColorKeywords.txt
+++ /dev/null
@@ -1,28 +0,0 @@
-Core.ColorKeywords
-TYPE: hash
-VERSION: 2.0.0
---DEFAULT--
-array (
-  'maroon' => '#800000',
-  'red' => '#FF0000',
-  'orange' => '#FFA500',
-  'yellow' => '#FFFF00',
-  'olive' => '#808000',
-  'purple' => '#800080',
-  'fuchsia' => '#FF00FF',
-  'white' => '#FFFFFF',
-  'lime' => '#00FF00',
-  'green' => '#008000',
-  'navy' => '#000080',
-  'blue' => '#0000FF',
-  'aqua' => '#00FFFF',
-  'teal' => '#008080',
-  'black' => '#000000',
-  'silver' => '#C0C0C0',
-  'gray' => '#808080',
-)
---DESCRIPTION--
-
-Lookup array of color names to six digit hexadecimal number corresponding
-to color, with preceding hash mark. Used when parsing colors.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.ConvertDocumentToFragment.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.ConvertDocumentToFragment.txt
deleted file mode 100644
index 64b114fce2..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.ConvertDocumentToFragment.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-Core.ConvertDocumentToFragment
-TYPE: bool
-DEFAULT: true
---DESCRIPTION--
-
-This parameter determines whether or not the filter should convert
-input that is a full document with html and body tags to a fragment
-of just the contents of a body tag. This parameter is simply something
-HTML Purifier can do during an edge-case: for most inputs, this
-processing is not necessary.
-
---ALIASES--
-Core.AcceptFullDocuments
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.DirectLexLineNumberSyncInterval.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.DirectLexLineNumberSyncInterval.txt
deleted file mode 100644
index 36f16e07ea..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.DirectLexLineNumberSyncInterval.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-Core.DirectLexLineNumberSyncInterval
-TYPE: int
-VERSION: 2.0.0
-DEFAULT: 0
---DESCRIPTION--
-
-<p>
-  Specifies the number of tokens the DirectLex line number tracking
-  implementations should process before attempting to resyncronize the
-  current line count by manually counting all previous new-lines. When
-  at 0, this functionality is disabled. Lower values will decrease
-  performance, and this is only strictly necessary if the counting
-  algorithm is buggy (in which case you should report it as a bug).
-  This has no effect when %Core.MaintainLineNumbers is disabled or DirectLex is
-  not being used.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.Encoding.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.Encoding.txt
deleted file mode 100644
index 8bfb47c3ac..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.Encoding.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-Core.Encoding
-TYPE: istring
-DEFAULT: 'utf-8'
---DESCRIPTION--
-If for some reason you are unable to convert all webpages to UTF-8, you can
-use this directive as a stop-gap compatibility change to let HTML Purifier
-deal with non UTF-8 input.  This technique has notable deficiencies:
-absolutely no characters outside of the selected character encoding will be
-preserved, not even the ones that have been ampersand escaped (this is due
-to a UTF-8 specific <em>feature</em> that automatically resolves all
-entities), making it pretty useless for anything except the most I18N-blind
-applications, although %Core.EscapeNonASCIICharacters offers fixes this
-trouble with another tradeoff. This directive only accepts ISO-8859-1 if
-iconv is not enabled.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidChildren.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidChildren.txt
deleted file mode 100644
index 4d5b5055cd..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidChildren.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-Core.EscapeInvalidChildren
-TYPE: bool
-DEFAULT: false
---DESCRIPTION--
-When true, a child is found that is not allowed in the context of the
-parent element will be transformed into text as if it were ASCII. When
-false, that element and all internal tags will be dropped, though text will
-be preserved.  There is no option for dropping the element but preserving
-child nodes.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidTags.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidTags.txt
deleted file mode 100644
index a7a5b249bb..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.EscapeInvalidTags.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-Core.EscapeInvalidTags
-TYPE: bool
-DEFAULT: false
---DESCRIPTION--
-When true, invalid tags will be written back to the document as plain text.
-Otherwise, they are silently dropped.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.EscapeNonASCIICharacters.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.EscapeNonASCIICharacters.txt
deleted file mode 100644
index abb499948a..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.EscapeNonASCIICharacters.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-Core.EscapeNonASCIICharacters
-TYPE: bool
-VERSION: 1.4.0
-DEFAULT: false
---DESCRIPTION--
-This directive overcomes a deficiency in %Core.Encoding by blindly
-converting all non-ASCII characters into decimal numeric entities before
-converting it to its native encoding. This means that even characters that
-can be expressed in the non-UTF-8 encoding will be entity-ized, which can
-be a real downer for encodings like Big5. It also assumes that the ASCII
-repetoire is available, although this is the case for almost all encodings.
-Anyway, use UTF-8!
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.HiddenElements.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.HiddenElements.txt
deleted file mode 100644
index 915391edb7..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.HiddenElements.txt
+++ /dev/null
@@ -1,19 +0,0 @@
-Core.HiddenElements
-TYPE: lookup
---DEFAULT--
-array (
-  'script' => true,
-  'style' => true,
-)
---DESCRIPTION--
-
-<p>
-  This directive is a lookup array of elements which should have their
-  contents removed when they are not allowed by the HTML definition.
-  For example, the contents of a <code>script</code> tag are not
-  normally shown in a document, so if script tags are to be removed,
-  their contents should be removed to. This is opposed to a <code>b</code>
-  tag, which defines some presentational changes but does not hide its
-  contents.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.Language.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.Language.txt
deleted file mode 100644
index 233fca14f8..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.Language.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-Core.Language
-TYPE: string
-VERSION: 2.0.0
-DEFAULT: 'en'
---DESCRIPTION--
-
-ISO 639 language code for localizable things in HTML Purifier to use,
-which is mainly error reporting. There is currently only an English (en)
-translation, so this directive is currently useless.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.LexerImpl.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.LexerImpl.txt
deleted file mode 100644
index 8983e2cca9..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.LexerImpl.txt
+++ /dev/null
@@ -1,34 +0,0 @@
-Core.LexerImpl
-TYPE: mixed/null
-VERSION: 2.0.0
-DEFAULT: NULL
---DESCRIPTION--
-
-<p>
-  This parameter determines what lexer implementation can be used. The
-  valid values are:
-</p>
-<dl>
-  <dt><em>null</em></dt>
-  <dd>
-    Recommended, the lexer implementation will be auto-detected based on
-    your PHP-version and configuration.
-  </dd>
-  <dt><em>string</em> lexer identifier</dt>
-  <dd>
-    This is a slim way of manually overridding the implementation.
-    Currently recognized values are: DOMLex (the default PHP5
-implementation)
-    and DirectLex (the default PHP4 implementation). Only use this if
-    you know what you are doing: usually, the auto-detection will
-    manage things for cases you aren't even aware of.
-  </dd>
-  <dt><em>object</em> lexer instance</dt>
-  <dd>
-    Super-advanced: you can specify your own, custom, implementation that
-    implements the interface defined by <code>HTMLPurifier_Lexer</code>.
-    I may remove this option simply because I don't expect anyone
-    to use it.
-  </dd>
-</dl>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.MaintainLineNumbers.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.MaintainLineNumbers.txt
deleted file mode 100644
index eb841a7597..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.MaintainLineNumbers.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-Core.MaintainLineNumbers
-TYPE: bool/null
-VERSION: 2.0.0
-DEFAULT: NULL
---DESCRIPTION--
-
-<p>
-  If true, HTML Purifier will add line number information to all tokens.
-  This is useful when error reporting is turned on, but can result in
-  significant performance degradation and should not be used when
-  unnecessary. This directive must be used with the DirectLex lexer,
-  as the DOMLex lexer does not (yet) support this functionality.
-  If the value is null, an appropriate value will be selected based
-  on other configuration.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.RemoveInvalidImg.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.RemoveInvalidImg.txt
deleted file mode 100644
index 4070c2a0de..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.RemoveInvalidImg.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-Core.RemoveInvalidImg
-TYPE: bool
-DEFAULT: true
-VERSION: 1.3.0
---DESCRIPTION--
-
-<p>
-  This directive enables pre-emptive URI checking in <code>img</code>
-  tags, as the attribute validation strategy is not authorized to
-  remove elements from the document. Revert to pre-1.3.0 behavior by setting to false.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.RemoveScriptContents.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.RemoveScriptContents.txt
deleted file mode 100644
index a4cd966df8..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Core.RemoveScriptContents.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-Core.RemoveScriptContents
-TYPE: bool/null
-DEFAULT: NULL
-VERSION: 2.0.0
-DEPRECATED-VERSION: 2.1.0
-DEPRECATED-USE: Core.HiddenElements
---DESCRIPTION--
-<p>
-  This directive enables HTML Purifier to remove not only script tags
-  but all of their contents.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.Custom.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.Custom.txt
deleted file mode 100644
index 3db50ef204..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.Custom.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-Filter.Custom
-TYPE: list
-VERSION: 3.1.0
-DEFAULT: array()
---DESCRIPTION--
-<p>
-  This directive can be used to add custom filters; it is nearly the
-  equivalent of the now deprecated <code>HTMLPurifier-&gt;addFilter()</code>
-  method. Specify an array of concrete implementations.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Escaping.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Escaping.txt
deleted file mode 100644
index 16829bcda0..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Escaping.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-Filter.ExtractStyleBlocks.Escaping
-TYPE: bool
-VERSION: 3.0.0
-DEFAULT: true
-ALIASES: Filter.ExtractStyleBlocksEscaping, FilterParam.ExtractStyleBlocksEscaping
---DESCRIPTION--
-
-<p>
-  Whether or not to escape the dangerous characters &lt;, &gt; and &amp;
-  as \3C, \3E and \26, respectively. This is can be safely set to false
-  if the contents of StyleBlocks will be placed in an external stylesheet,
-  where there is no risk of it being interpreted as HTML.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Scope.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Scope.txt
deleted file mode 100644
index 7f95f54d12..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.Scope.txt
+++ /dev/null
@@ -1,29 +0,0 @@
-Filter.ExtractStyleBlocks.Scope
-TYPE: string/null
-VERSION: 3.0.0
-DEFAULT: NULL
-ALIASES: Filter.ExtractStyleBlocksScope, FilterParam.ExtractStyleBlocksScope
---DESCRIPTION--
-
-<p>
-  If you would like users to be able to define external stylesheets, but
-  only allow them to specify CSS declarations for a specific node and
-  prevent them from fiddling with other elements, use this directive.
-  It accepts any valid CSS selector, and will prepend this to any
-  CSS declaration extracted from the document. For example, if this
-  directive is set to <code>#user-content</code> and a user uses the
-  selector <code>a:hover</code>, the final selector will be
-  <code>#user-content a:hover</code>.
-</p>
-<p>
-  The comma shorthand may be used; consider the above example, with
-  <code>#user-content, #user-content2</code>, the final selector will
-  be <code>#user-content a:hover, #user-content2 a:hover</code>.
-</p>
-<p>
-  <strong>Warning:</strong> It is possible for users to bypass this measure
-  using a naughty + selector. This is a bug in CSS Tidy 1.3, not HTML
-  Purifier, and I am working to get it fixed. Until then, HTML Purifier
-  performs a basic check to prevent this.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.TidyImpl.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.TidyImpl.txt
deleted file mode 100644
index 6c231b2d7f..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.TidyImpl.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-Filter.ExtractStyleBlocks.TidyImpl
-TYPE: mixed/null
-VERSION: 3.1.0
-DEFAULT: NULL
-ALIASES: FilterParam.ExtractStyleBlocksTidyImpl
---DESCRIPTION--
-<p>
-  If left NULL, HTML Purifier will attempt to instantiate a <code>csstidy</code>
-  class to use for internal cleaning. This will usually be good enough.
-</p>
-<p>
-  However, for trusted user input, you can set this to <code>false</code> to
-  disable cleaning. In addition, you can supply your own concrete implementation
-  of Tidy's interface to use, although I don't know why you'd want to do that.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.txt
deleted file mode 100644
index 078d087417..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.ExtractStyleBlocks.txt
+++ /dev/null
@@ -1,74 +0,0 @@
-Filter.ExtractStyleBlocks
-TYPE: bool
-VERSION: 3.1.0
-DEFAULT: false
-EXTERNAL: CSSTidy
---DESCRIPTION--
-<p>
-  This directive turns on the style block extraction filter, which removes
-  <code>style</code> blocks from input HTML, cleans them up with CSSTidy,
-  and places them in the <code>StyleBlocks</code> context variable, for further
-  use by you, usually to be placed in an external stylesheet, or a
-  <code>style</code> block in the <code>head</code> of your document.
-</p>
-<p>
-  Sample usage:
-</p>
-<pre><![CDATA[
-<?php
-    header('Content-type: text/html; charset=utf-8');
-    echo '<?xml version="1.0" encoding="UTF-8"?>';
-?>
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
-  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
-<head>
-  <title>Filter.ExtractStyleBlocks</title>
-<?php
-    require_once '/path/to/library/HTMLPurifier.auto.php';
-    require_once '/path/to/csstidy.class.php';
-
-    $dirty = '<style>body {color:#F00;}</style> Some text';
-
-    $config = HTMLPurifier_Config::createDefault();
-    $config->set('Filter', 'ExtractStyleBlocks', true);
-    $purifier = new HTMLPurifier($config);
-
-    $html = $purifier->purify($dirty);
-
-    // This implementation writes the stylesheets to the styles/ directory.
-    // You can also echo the styles inside the document, but it's a bit
-    // more difficult to make sure they get interpreted properly by
-    // browsers; try the usual CSS armoring techniques.
-    $styles = $purifier->context->get('StyleBlocks');
-    $dir = 'styles/';
-    if (!is_dir($dir)) mkdir($dir);
-    $hash = sha1($_GET['html']);
-    foreach ($styles as $i => $style) {
-        file_put_contents($name = $dir . $hash . "_$i");
-        echo '<link rel="stylesheet" type="text/css" href="'.$name.'" />';
-    }
-?>
-</head>
-<body>
-  <div>
-    <?php echo $html; ?>
-  </div>
-</b]]><![CDATA[ody>
-</html>
-]]></pre>
-<p>
-  <strong>Warning:</strong> It is possible for a user to mount an
-  imagecrash attack using this CSS. Counter-measures are difficult;
-  it is not simply enough to limit the range of CSS lengths (using
-  relative lengths with many nesting levels allows for large values
-  to be attained without actually specifying them in the stylesheet),
-  and the flexible nature of selectors makes it difficult to selectively
-  disable lengths on image tags (HTML Purifier, however, does disable
-  CSS width and height in inline styling). There are probably two effective
-  counter measures: an explicit width and height set to auto in all
-  images in your document (unlikely) or the disabling of width and
-  height (somewhat reasonable). Whether or not these measures should be
-  used is left to the reader.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.YouTube.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.YouTube.txt
deleted file mode 100644
index 7fa6536b2c..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Filter.YouTube.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-Filter.YouTube
-TYPE: bool
-VERSION: 3.1.0
-DEFAULT: false
---DESCRIPTION--
-<p>
-  This directive enables YouTube video embedding in HTML Purifier. Check
-  <a href="http://htmlpurifier.org/docs/enduser-youtube.html">this document
-  on embedding videos</a> for more information on what this filter does.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Allowed.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Allowed.txt
deleted file mode 100644
index 3e231d2d16..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Allowed.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-HTML.Allowed
-TYPE: itext/null
-VERSION: 2.0.0
-DEFAULT: NULL
---DESCRIPTION--
-
-<p>
-    This is a convenience directive that rolls the functionality of
-    %HTML.AllowedElements and %HTML.AllowedAttributes into one directive.
-    Specify elements and attributes that are allowed using:
-    <code>element1[attr1|attr2],element2...</code>. You can also use
-    newlines instead of commas to separate elements.
-</p>
-<p>
-    <strong>Warning</strong>:
-    All of the constraints on the component directives are still enforced.
-    The syntax is a <em>subset</em> of TinyMCE's <code>valid_elements</code>
-    whitelist: directly copy-pasting it here will probably result in
-    broken whitelists. If %HTML.AllowedElements or %HTML.AllowedAttributes
-    are set, this directive has no effect.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.AllowedAttributes.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.AllowedAttributes.txt
deleted file mode 100644
index fcf093f17d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.AllowedAttributes.txt
+++ /dev/null
@@ -1,19 +0,0 @@
-HTML.AllowedAttributes
-TYPE: lookup/null
-VERSION: 1.3.0
-DEFAULT: NULL
---DESCRIPTION--
-
-<p>
-    If HTML Purifier's attribute set is unsatisfactory, overload it!
-    The syntax is "tag.attr" or "*.attr" for the global attributes
-    (style, id, class, dir, lang, xml:lang).
-</p>
-<p>
-    <strong>Warning:</strong> If another directive conflicts with the
-    elements here, <em>that</em> directive will win and override. For
-    example, %HTML.EnableAttrID will take precedence over *.id in this
-    directive.  You must set that directive to true before you can use
-    IDs at all.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.AllowedElements.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.AllowedElements.txt
deleted file mode 100644
index 888d558196..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.AllowedElements.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-HTML.AllowedElements
-TYPE: lookup/null
-VERSION: 1.3.0
-DEFAULT: NULL
---DESCRIPTION--
-<p>
-    If HTML Purifier's tag set is unsatisfactory for your needs, you
-    can overload it with your own list of tags to allow.  Note that this
-    method is subtractive: it does its job by taking away from HTML Purifier
-    usual feature set, so you cannot add a tag that HTML Purifier never
-    supported in the first place (like embed, form or head).  If you
-    change this, you probably also want to change %HTML.AllowedAttributes.
-</p>
-<p>
-    <strong>Warning:</strong> If another directive conflicts with the
-    elements here, <em>that</em> directive will win and override.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.AllowedModules.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.AllowedModules.txt
deleted file mode 100644
index 5a59a55c08..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.AllowedModules.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-HTML.AllowedModules
-TYPE: lookup/null
-VERSION: 2.0.0
-DEFAULT: NULL
---DESCRIPTION--
-
-<p>
-    A doctype comes with a set of usual modules to use. Without having
-    to mucking about with the doctypes, you can quickly activate or
-    disable these modules by specifying which modules you wish to allow
-    with this directive. This is most useful for unit testing specific
-    modules, although end users may find it useful for their own ends.
-</p>
-<p>
-    If you specify a module that does not exist, the manager will silently
-    fail to use it, so be careful! User-defined modules are not affected
-    by this directive. Modules defined in %HTML.CoreModules are not
-    affected by this directive.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Attr.Name.UseCDATA.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Attr.Name.UseCDATA.txt
deleted file mode 100644
index 151fb7b826..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Attr.Name.UseCDATA.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-HTML.Attr.Name.UseCDATA
-TYPE: bool
-DEFAULT: false
-VERSION: 4.0.0
---DESCRIPTION--
-The W3C specification DTD defines the name attribute to be CDATA, not ID, due
-to limitations of DTD.  In certain documents, this relaxed behavior is desired,
-whether it is to specify duplicate names, or to specify names that would be
-illegal IDs (for example, names that begin with a digit.) Set this configuration
-directive to true to use the relaxed parsing rules.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.BlockWrapper.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.BlockWrapper.txt
deleted file mode 100644
index 45ae469ec9..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.BlockWrapper.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-HTML.BlockWrapper
-TYPE: string
-VERSION: 1.3.0
-DEFAULT: 'p'
---DESCRIPTION--
-
-<p>
-    String name of element to wrap inline elements that are inside a block
-    context.  This only occurs in the children of blockquote in strict mode.
-</p>
-<p>
-    Example: by default value,
-    <code>&lt;blockquote&gt;Foo&lt;/blockquote&gt;</code> would become
-    <code>&lt;blockquote&gt;&lt;p&gt;Foo&lt;/p&gt;&lt;/blockquote&gt;</code>.
-    The <code>&lt;p&gt;</code> tags can be replaced with whatever you desire,
-    as long as it is a block level element.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.CoreModules.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.CoreModules.txt
deleted file mode 100644
index 5246188795..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.CoreModules.txt
+++ /dev/null
@@ -1,23 +0,0 @@
-HTML.CoreModules
-TYPE: lookup
-VERSION: 2.0.0
---DEFAULT--
-array (
-  'Structure' => true,
-  'Text' => true,
-  'Hypertext' => true,
-  'List' => true,
-  'NonXMLCommonAttributes' => true,
-  'XMLCommonAttributes' => true,
-  'CommonAttributes' => true,
-)
---DESCRIPTION--
-
-<p>
-    Certain modularized doctypes (XHTML, namely), have certain modules
-    that must be included for the doctype to be an conforming document
-    type: put those modules here. By default, XHTML's core modules
-    are used. You can set this to a blank array to disable core module
-    protection, but this is not recommended.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.CustomDoctype.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.CustomDoctype.txt
deleted file mode 100644
index a64e3d7c36..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.CustomDoctype.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-HTML.CustomDoctype
-TYPE: string/null
-VERSION: 2.0.1
-DEFAULT: NULL
---DESCRIPTION--
-
-A custom doctype for power-users who defined there own document
-type. This directive only applies when %HTML.Doctype is blank.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionID.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionID.txt
deleted file mode 100644
index 103db754a2..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionID.txt
+++ /dev/null
@@ -1,33 +0,0 @@
-HTML.DefinitionID
-TYPE: string/null
-DEFAULT: NULL
-VERSION: 2.0.0
---DESCRIPTION--
-
-<p>
-    Unique identifier for a custom-built HTML definition. If you edit
-    the raw version of the HTMLDefinition, introducing changes that the
-    configuration object does not reflect, you must specify this variable.
-    If you change your custom edits, you should change this directive, or
-    clear your cache. Example:
-</p>
-<pre>
-$config = HTMLPurifier_Config::createDefault();
-$config->set('HTML', 'DefinitionID', '1');
-$def = $config->getHTMLDefinition();
-$def->addAttribute('a', 'tabindex', 'Number');
-</pre>
-<p>
-    In the above example, the configuration is still at the defaults, but
-    using the advanced API, an extra attribute has been added. The
-    configuration object normally has no way of knowing that this change
-    has taken place, so it needs an extra directive: %HTML.DefinitionID.
-    If someone else attempts to use the default configuration, these two
-    pieces of code will not clobber each other in the cache, since one has
-    an extra directive attached to it.
-</p>
-<p>
-    You <em>must</em> specify a value to this directive to use the
-    advanced API features.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionRev.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionRev.txt
deleted file mode 100644
index 229ae0267a..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.DefinitionRev.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-HTML.DefinitionRev
-TYPE: int
-VERSION: 2.0.0
-DEFAULT: 1
---DESCRIPTION--
-
-<p>
-    Revision identifier for your custom definition specified in
-    %HTML.DefinitionID.  This serves the same purpose: uniquely identifying
-    your custom definition, but this one does so in a chronological
-    context: revision 3 is more up-to-date then revision 2.  Thus, when
-    this gets incremented, the cache handling is smart enough to clean
-    up any older revisions of your definition as well as flush the
-    cache.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Doctype.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Doctype.txt
deleted file mode 100644
index 9dab497f2f..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Doctype.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-HTML.Doctype
-TYPE: string/null
-DEFAULT: NULL
---DESCRIPTION--
-Doctype to use during filtering. Technically speaking this is not actually
-a doctype (as it does not identify a corresponding DTD), but we are using
-this name for sake of simplicity. When non-blank, this will override any
-older directives like %HTML.XHTML or %HTML.Strict.
---ALLOWED--
-'HTML 4.01 Transitional', 'HTML 4.01 Strict', 'XHTML 1.0 Transitional', 'XHTML 1.0 Strict', 'XHTML 1.1'
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenAttributes.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenAttributes.txt
deleted file mode 100644
index 57358f9bad..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenAttributes.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-HTML.ForbiddenAttributes
-TYPE: lookup
-VERSION: 3.1.0
-DEFAULT: array()
---DESCRIPTION--
-<p>
-    While this directive is similar to %HTML.AllowedAttributes, for
-    forwards-compatibility with XML, this attribute has a different syntax. Instead of
-    <code>tag.attr</code>, use <code>tag@attr</code>. To disallow <code>href</code>
-    attributes in <code>a</code> tags, set this directive to
-    <code>a@href</code>. You can also disallow an attribute globally with
-    <code>attr</code> or <code>*@attr</code> (either syntax is fine; the latter
-    is provided for consistency with %HTML.AllowedAttributes).
-</p>
-<p>
-    <strong>Warning:</strong> This directive complements %HTML.ForbiddenElements,
-    accordingly, check
-    out that directive for a discussion of why you
-    should think twice before using this directive.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenElements.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenElements.txt
deleted file mode 100644
index 93a53e14fb..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.ForbiddenElements.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-HTML.ForbiddenElements
-TYPE: lookup
-VERSION: 3.1.0
-DEFAULT: array()
---DESCRIPTION--
-<p>
-    This was, perhaps, the most requested feature ever in HTML
-    Purifier. Please don't abuse it! This is the logical inverse of
-    %HTML.AllowedElements, and it will override that directive, or any
-    other directive.
-</p>
-<p>
-    If possible, %HTML.Allowed is recommended over this directive, because it
-    can sometimes be difficult to tell whether or not you've forbidden all of
-    the behavior you would like to disallow. If you forbid <code>img</code>
-    with the expectation of preventing images on your site, you'll be in for
-    a nasty surprise when people start using the <code>background-image</code>
-    CSS property.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.MaxImgLength.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.MaxImgLength.txt
deleted file mode 100644
index e424c386ec..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.MaxImgLength.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-HTML.MaxImgLength
-TYPE: int/null
-DEFAULT: 1200
-VERSION: 3.1.1
---DESCRIPTION--
-<p>
- This directive controls the maximum number of pixels in the width and
- height attributes in <code>img</code> tags. This is
- in place to prevent imagecrash attacks, disable with null at your own risk.
- This directive is similar to %CSS.MaxImgLength, and both should be
- concurrently edited, although there are
- subtle differences in the input format (the HTML max is an integer).
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Parent.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Parent.txt
deleted file mode 100644
index 62e8e160c7..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Parent.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-HTML.Parent
-TYPE: string
-VERSION: 1.3.0
-DEFAULT: 'div'
---DESCRIPTION--
-
-<p>
-    String name of element that HTML fragment passed to library will be
-    inserted in.  An interesting variation would be using span as the
-    parent element, meaning that only inline tags would be allowed.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Proprietary.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Proprietary.txt
deleted file mode 100644
index dfb720496d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Proprietary.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-HTML.Proprietary
-TYPE: bool
-VERSION: 3.1.0
-DEFAULT: false
---DESCRIPTION--
-<p>
-    Whether or not to allow proprietary elements and attributes in your
-    documents, as per <code>HTMLPurifier_HTMLModule_Proprietary</code>.
-    <strong>Warning:</strong> This can cause your documents to stop
-    validating!
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.SafeEmbed.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.SafeEmbed.txt
deleted file mode 100644
index f635a68548..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.SafeEmbed.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-HTML.SafeEmbed
-TYPE: bool
-VERSION: 3.1.1
-DEFAULT: false
---DESCRIPTION--
-<p>
-    Whether or not to permit embed tags in documents, with a number of extra
-    security features added to prevent script execution. This is similar to
-    what websites like MySpace do to embed tags. Embed is a proprietary
-    element and will cause your website to stop validating. You probably want
-    to enable this with %HTML.SafeObject.
-    <strong>Highly experimental.</strong>
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.SafeObject.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.SafeObject.txt
deleted file mode 100644
index 32967b88fb..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.SafeObject.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-HTML.SafeObject
-TYPE: bool
-VERSION: 3.1.1
-DEFAULT: false
---DESCRIPTION--
-<p>
-    Whether or not to permit object tags in documents, with a number of extra
-    security features added to prevent script execution. This is similar to
-    what websites like MySpace do to object tags. You may also want to
-    enable %HTML.SafeEmbed for maximum interoperability with Internet Explorer,
-    although embed tags will cause your website to stop validating.
-    <strong>Highly experimental.</strong>
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Strict.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Strict.txt
deleted file mode 100644
index a8b1de56be..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Strict.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-HTML.Strict
-TYPE: bool
-VERSION: 1.3.0
-DEFAULT: false
-DEPRECATED-VERSION: 1.7.0
-DEPRECATED-USE: HTML.Doctype
---DESCRIPTION--
-Determines whether or not to use Transitional (loose) or Strict rulesets.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.TidyAdd.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.TidyAdd.txt
deleted file mode 100644
index b4c271b7fa..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.TidyAdd.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-HTML.TidyAdd
-TYPE: lookup
-VERSION: 2.0.0
-DEFAULT: array()
---DESCRIPTION--
-
-Fixes to add to the default set of Tidy fixes as per your level.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.TidyLevel.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.TidyLevel.txt
deleted file mode 100644
index 4186ccd0d1..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.TidyLevel.txt
+++ /dev/null
@@ -1,24 +0,0 @@
-HTML.TidyLevel
-TYPE: string
-VERSION: 2.0.0
-DEFAULT: 'medium'
---DESCRIPTION--
-
-<p>General level of cleanliness the Tidy module should enforce.
-There are four allowed values:</p>
-<dl>
-    <dt>none</dt>
-    <dd>No extra tidying should be done</dd>
-    <dt>light</dt>
-    <dd>Only fix elements that would be discarded otherwise due to
-    lack of support in doctype</dd>
-    <dt>medium</dt>
-    <dd>Enforce best practices</dd>
-    <dt>heavy</dt>
-    <dd>Transform all deprecated elements and attributes to standards
-    compliant equivalents</dd>
-</dl>
-
---ALLOWED--
-'none', 'light', 'medium', 'heavy'
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.TidyRemove.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.TidyRemove.txt
deleted file mode 100644
index 996762bd1d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.TidyRemove.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-HTML.TidyRemove
-TYPE: lookup
-VERSION: 2.0.0
-DEFAULT: array()
---DESCRIPTION--
-
-Fixes to remove from the default set of Tidy fixes as per your level.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Trusted.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Trusted.txt
deleted file mode 100644
index 89133b1a38..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.Trusted.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-HTML.Trusted
-TYPE: bool
-VERSION: 2.0.0
-DEFAULT: false
---DESCRIPTION--
-Indicates whether or not the user input is trusted or not. If the input is
-trusted, a more expansive set of allowed tags and attributes will be used.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.XHTML.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.XHTML.txt
deleted file mode 100644
index 2a47e384f4..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/HTML.XHTML.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-HTML.XHTML
-TYPE: bool
-DEFAULT: true
-VERSION: 1.1.0
-DEPRECATED-VERSION: 1.7.0
-DEPRECATED-USE: HTML.Doctype
---DESCRIPTION--
-Determines whether or not output is XHTML 1.0 or HTML 4.01 flavor.
---ALIASES--
-Core.XHTML
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Output.CommentScriptContents.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Output.CommentScriptContents.txt
deleted file mode 100644
index 08921fde70..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Output.CommentScriptContents.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-Output.CommentScriptContents
-TYPE: bool
-VERSION: 2.0.0
-DEFAULT: true
---DESCRIPTION--
-Determines whether or not HTML Purifier should attempt to fix up the
-contents of script tags for legacy browsers with comments.
---ALIASES--
-Core.CommentScriptContents
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Output.Newline.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Output.Newline.txt
deleted file mode 100644
index 79f8ad82cf..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Output.Newline.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-Output.Newline
-TYPE: string/null
-VERSION: 2.0.1
-DEFAULT: NULL
---DESCRIPTION--
-
-<p>
-    Newline string to format final output with. If left null, HTML Purifier
-    will auto-detect the default newline type of the system and use that;
-    you can manually override it here. Remember, \r\n is Windows, \r
-    is Mac, and \n is Unix.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Output.SortAttr.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Output.SortAttr.txt
deleted file mode 100644
index 232b02362a..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Output.SortAttr.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-Output.SortAttr
-TYPE: bool
-VERSION: 3.2.0
-DEFAULT: false
---DESCRIPTION--
-<p>
-  If true, HTML Purifier will sort attributes by name before writing them back
-  to the document, converting a tag like: <code>&lt;el b="" a="" c="" /&gt;</code>
-  to <code>&lt;el a="" b="" c="" /&gt;</code>. This is a workaround for
-  a bug in FCKeditor which causes it to swap attributes order, adding noise
-  to text diffs. If you're not seeing this bug, chances are, you don't need
-  this directive.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Output.TidyFormat.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Output.TidyFormat.txt
deleted file mode 100644
index 06bab00a0a..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Output.TidyFormat.txt
+++ /dev/null
@@ -1,25 +0,0 @@
-Output.TidyFormat
-TYPE: bool
-VERSION: 1.1.1
-DEFAULT: false
---DESCRIPTION--
-<p>
-    Determines whether or not to run Tidy on the final output for pretty
-    formatting reasons, such as indentation and wrap.
-</p>
-<p>
-    This can greatly improve readability for editors who are hand-editing
-    the HTML, but is by no means necessary as HTML Purifier has already
-    fixed all major errors the HTML may have had. Tidy is a non-default
-    extension, and this directive will silently fail if Tidy is not
-    available.
-</p>
-<p>
-    If you are looking to make the overall look of your page's source
-    better, I recommend running Tidy on the entire page rather than just
-    user-content (after all, the indentation relative to the containing
-    blocks will be incorrect).
-</p>
---ALIASES--
-Core.TidyFormat
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Test.ForceNoIconv.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Test.ForceNoIconv.txt
deleted file mode 100644
index 071bc0295d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/Test.ForceNoIconv.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-Test.ForceNoIconv
-TYPE: bool
-DEFAULT: false
---DESCRIPTION--
-When set to true, HTMLPurifier_Encoder will act as if iconv does not exist
-and use only pure PHP implementations.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.AllowedSchemes.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.AllowedSchemes.txt
deleted file mode 100644
index 98fdfe9222..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.AllowedSchemes.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-URI.AllowedSchemes
-TYPE: lookup
---DEFAULT--
-array (
-  'http' => true,
-  'https' => true,
-  'mailto' => true,
-  'ftp' => true,
-  'nntp' => true,
-  'news' => true,
-)
---DESCRIPTION--
-Whitelist that defines the schemes that a URI is allowed to have.  This
-prevents XSS attacks from using pseudo-schemes like javascript or mocha.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.Base.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.Base.txt
deleted file mode 100644
index 876f0680cf..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.Base.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-URI.Base
-TYPE: string/null
-VERSION: 2.1.0
-DEFAULT: NULL
---DESCRIPTION--
-
-<p>
-    The base URI is the URI of the document this purified HTML will be
-    inserted into.  This information is important if HTML Purifier needs
-    to calculate absolute URIs from relative URIs, such as when %URI.MakeAbsolute
-    is on.  You may use a non-absolute URI for this value, but behavior
-    may vary (%URI.MakeAbsolute deals nicely with both absolute and
-    relative paths, but forwards-compatibility is not guaranteed).
-    <strong>Warning:</strong> If set, the scheme on this URI
-    overrides the one specified by %URI.DefaultScheme.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DefaultScheme.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DefaultScheme.txt
deleted file mode 100644
index 728e378cbe..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DefaultScheme.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-URI.DefaultScheme
-TYPE: string
-DEFAULT: 'http'
---DESCRIPTION--
-
-<p>
-    Defines through what scheme the output will be served, in order to
-    select the proper object validator when no scheme information is present.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DefinitionID.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DefinitionID.txt
deleted file mode 100644
index f05312ba86..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DefinitionID.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-URI.DefinitionID
-TYPE: string/null
-VERSION: 2.1.0
-DEFAULT: NULL
---DESCRIPTION--
-
-<p>
-    Unique identifier for a custom-built URI definition. If you  want
-    to add custom URIFilters, you must specify this value.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DefinitionRev.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DefinitionRev.txt
deleted file mode 100644
index 80cfea93f7..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DefinitionRev.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-URI.DefinitionRev
-TYPE: int
-VERSION: 2.1.0
-DEFAULT: 1
---DESCRIPTION--
-
-<p>
-    Revision identifier for your custom definition. See
-    %HTML.DefinitionRev for details.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.Disable.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.Disable.txt
deleted file mode 100644
index 71ce025a2d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.Disable.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-URI.Disable
-TYPE: bool
-VERSION: 1.3.0
-DEFAULT: false
---DESCRIPTION--
-
-<p>
-    Disables all URIs in all forms. Not sure why you'd want to do that
-    (after all, the Internet's founded on the notion of a hyperlink).
-</p>
-
---ALIASES--
-Attr.DisableURI
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DisableExternal.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DisableExternal.txt
deleted file mode 100644
index 13c122c8ce..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DisableExternal.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-URI.DisableExternal
-TYPE: bool
-VERSION: 1.2.0
-DEFAULT: false
---DESCRIPTION--
-Disables links to external websites.  This is a highly effective anti-spam
-and anti-pagerank-leech measure, but comes at a hefty price: nolinks or
-images outside of your domain will be allowed.  Non-linkified URIs will
-still be preserved.  If you want to be able to link to subdomains or use
-absolute URIs, specify %URI.Host for your website.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DisableExternalResources.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DisableExternalResources.txt
deleted file mode 100644
index abcc1efd61..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DisableExternalResources.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-URI.DisableExternalResources
-TYPE: bool
-VERSION: 1.3.0
-DEFAULT: false
---DESCRIPTION--
-Disables the embedding of external resources, preventing users from
-embedding things like images from other hosts. This prevents access
-tracking (good for email viewers), bandwidth leeching, cross-site request
-forging, goatse.cx posting, and other nasties, but also results in a loss
-of end-user functionality (they can't directly post a pic they posted from
-Flickr anymore). Use it if you don't have a robust user-content moderation
-team.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DisableResources.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DisableResources.txt
deleted file mode 100644
index 51e6ea91f7..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.DisableResources.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-URI.DisableResources
-TYPE: bool
-VERSION: 1.3.0
-DEFAULT: false
---DESCRIPTION--
-
-<p>
-    Disables embedding resources, essentially meaning no pictures. You can
-    still link to them though. See %URI.DisableExternalResources for why
-    this might be a good idea.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.Host.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.Host.txt
deleted file mode 100644
index ee83b121de..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.Host.txt
+++ /dev/null
@@ -1,19 +0,0 @@
-URI.Host
-TYPE: string/null
-VERSION: 1.2.0
-DEFAULT: NULL
---DESCRIPTION--
-
-<p>
-    Defines the domain name of the server, so we can determine whether or
-    an absolute URI is from your website or not.  Not strictly necessary,
-    as users should be using relative URIs to reference resources on your
-    website.  It will, however, let you use absolute URIs to link to
-    subdomains of the domain you post here: i.e. example.com will allow
-    sub.example.com.  However, higher up domains will still be excluded:
-    if you set %URI.Host to sub.example.com, example.com will be blocked.
-    <strong>Note:</strong> This directive overrides %URI.Base because
-    a given page may be on a sub-domain, but you wish HTML Purifier to be
-    more relaxed and allow some of the parent domains too.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.HostBlacklist.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.HostBlacklist.txt
deleted file mode 100644
index 0b6df7625d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.HostBlacklist.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-URI.HostBlacklist
-TYPE: list
-VERSION: 1.3.0
-DEFAULT: array()
---DESCRIPTION--
-List of strings that are forbidden in the host of any URI. Use it to kill
-domain names of spam, etc. Note that it will catch anything in the domain,
-so <tt>moo.com</tt> will catch <tt>moo.com.example.com</tt>.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.MakeAbsolute.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.MakeAbsolute.txt
deleted file mode 100644
index 4214900a59..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.MakeAbsolute.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-URI.MakeAbsolute
-TYPE: bool
-VERSION: 2.1.0
-DEFAULT: false
---DESCRIPTION--
-
-<p>
-    Converts all URIs into absolute forms. This is useful when the HTML
-    being filtered assumes a specific base path, but will actually be
-    viewed in a different context (and setting an alternate base URI is
-    not possible). %URI.Base must be set for this directive to work.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.Munge.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.Munge.txt
deleted file mode 100644
index 58c81dcc44..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.Munge.txt
+++ /dev/null
@@ -1,83 +0,0 @@
-URI.Munge
-TYPE: string/null
-VERSION: 1.3.0
-DEFAULT: NULL
---DESCRIPTION--
-
-<p>
-    Munges all browsable (usually http, https and ftp)
-    absolute URIs into another URI, usually a URI redirection service.
-    This directive accepts a URI, formatted with a <code>%s</code> where
-    the url-encoded original URI should be inserted (sample:
-    <code>http://www.google.com/url?q=%s</code>).
-</p>
-<p>
-    Uses for this directive:
-</p>
-<ul>
-    <li>
-        Prevent PageRank leaks, while being fairly transparent
-        to users (you may also want to add some client side JavaScript to
-        override the text in the statusbar). <strong>Notice</strong>:
-        Many security experts believe that this form of protection does not deter spam-bots.
-    </li>
-    <li>
-        Redirect users to a splash page telling them they are leaving your
-        website. While this is poor usability practice, it is often mandated
-        in corporate environments.
-    </li>
-</ul>
-<p>
-    Prior to HTML Purifier 3.1.1, this directive also enabled the munging
-    of browsable external resources, which could break things if your redirection
-    script was a splash page or used <code>meta</code> tags. To revert to
-    previous behavior, please use %URI.MungeResources.
-</p>
-<p>
-    You may want to also use %URI.MungeSecretKey along with this directive
-    in order to enforce what URIs your redirector script allows. Open
-    redirector scripts can be a security risk and negatively affect the
-    reputation of your domain name.
-</p>
-<p>
-    Starting with HTML Purifier 3.1.1, there is also these substitutions:
-</p>
-<table>
-    <thead>
-        <tr>
-            <th>Key</th>
-            <th>Description</th>
-            <th>Example <code>&lt;a href=""&gt;</code></th>
-        </tr>
-    </thead>
-    <tbody>
-        <tr>
-            <td>%r</td>
-            <td>1 - The URI embeds a resource<br />(blank) - The URI is merely a link</td>
-            <td></td>
-        </tr>
-        <tr>
-            <td>%n</td>
-            <td>The name of the tag this URI came from</td>
-            <td>a</td>
-        </tr>
-        <tr>
-            <td>%m</td>
-            <td>The name of the attribute this URI came from</td>
-            <td>href</td>
-        </tr>
-        <tr>
-            <td>%p</td>
-            <td>The name of the CSS property this URI came from, or blank if irrelevant</td>
-            <td></td>
-        </tr>
-    </tbody>
-</table>
-<p>
-    Admittedly, these letters are somewhat arbitrary; the only stipulation
-    was that they couldn't be a through f. r is for resource (I would have preferred
-    e, but you take what you can get), n is for name, m
-    was picked because it came after n (and I couldn't use a), p is for
-    property.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.MungeResources.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.MungeResources.txt
deleted file mode 100644
index 6fce0fdc37..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.MungeResources.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-URI.MungeResources
-TYPE: bool
-VERSION: 3.1.1
-DEFAULT: false
---DESCRIPTION--
-<p>
-    If true, any URI munging directives like %URI.Munge
-    will also apply to embedded resources, such as <code>&lt;img src=""&gt;</code>.
-    Be careful enabling this directive if you have a redirector script
-    that does not use the <code>Location</code> HTTP header; all of your images
-    and other embedded resources will break.
-</p>
-<p>
-    <strong>Warning:</strong> It is strongly advised you use this in conjunction
-    %URI.MungeSecretKey to mitigate the security risk of an open redirector.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.MungeSecretKey.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.MungeSecretKey.txt
deleted file mode 100644
index 0d00f62ea8..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.MungeSecretKey.txt
+++ /dev/null
@@ -1,30 +0,0 @@
-URI.MungeSecretKey
-TYPE: string/null
-VERSION: 3.1.1
-DEFAULT: NULL
---DESCRIPTION--
-<p>
-    This directive enables secure checksum generation along with %URI.Munge.
-    It should be set to a secure key that is not shared with anyone else.
-    The checksum can be placed in the URI using %t. Use of this checksum
-    affords an additional level of protection by allowing a redirector
-    to check if a URI has passed through HTML Purifier with this line:
-</p>
-
-<pre>$checksum === sha1($secret_key . ':' . $url)</pre>
-
-<p>
-    If the output is TRUE, the redirector script should accept the URI.
-</p>
-
-<p>
-    Please note that it would still be possible for an attacker to procure
-    secure hashes en-mass by abusing your website's Preview feature or the
-    like, but this service affords an additional level of protection
-    that should be combined with website blacklisting.
-</p>
-
-<p>
-    Remember this has no effect if %URI.Munge is not on.
-</p>
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.OverrideAllowedSchemes.txt b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.OverrideAllowedSchemes.txt
deleted file mode 100644
index 23331a4e79..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/URI.OverrideAllowedSchemes.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-URI.OverrideAllowedSchemes
-TYPE: bool
-DEFAULT: true
---DESCRIPTION--
-If this is set to true (which it is by default), you can override
-%URI.AllowedSchemes by simply registering a HTMLPurifier_URIScheme to the
-registry.  If false, you will also have to update that directive in order
-to add more schemes.
---# vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/info.ini b/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/info.ini
deleted file mode 100644
index 5de4505e1b..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ConfigSchema/schema/info.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-name = "HTML Purifier"
-
-; vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ContentSets.php b/extlib/HTMLPurifier/HTMLPurifier/ContentSets.php
deleted file mode 100644
index 3b6e96f5f5..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ContentSets.php
+++ /dev/null
@@ -1,155 +0,0 @@
-<?php
-
-/**
- * @todo Unit test
- */
-class HTMLPurifier_ContentSets
-{
-
-    /**
-     * List of content set strings (pipe seperators) indexed by name.
-     */
-    public $info = array();
-
-    /**
-     * List of content set lookups (element => true) indexed by name.
-     * @note This is in HTMLPurifier_HTMLDefinition->info_content_sets
-     */
-    public $lookup = array();
-
-    /**
-     * Synchronized list of defined content sets (keys of info)
-     */
-    protected $keys = array();
-    /**
-     * Synchronized list of defined content values (values of info)
-     */
-    protected $values = array();
-
-    /**
-     * Merges in module's content sets, expands identifiers in the content
-     * sets and populates the keys, values and lookup member variables.
-     * @param $modules List of HTMLPurifier_HTMLModule
-     */
-    public function __construct($modules) {
-        if (!is_array($modules)) $modules = array($modules);
-        // populate content_sets based on module hints
-        // sorry, no way of overloading
-        foreach ($modules as $module_i => $module) {
-            foreach ($module->content_sets as $key => $value) {
-                $temp = $this->convertToLookup($value);
-                if (isset($this->lookup[$key])) {
-                    // add it into the existing content set
-                    $this->lookup[$key] = array_merge($this->lookup[$key], $temp);
-                } else {
-                    $this->lookup[$key] = $temp;
-                }
-            }
-        }
-        $old_lookup = false;
-        while ($old_lookup !== $this->lookup) {
-            $old_lookup = $this->lookup;
-            foreach ($this->lookup as $i => $set) {
-                $add = array();
-                foreach ($set as $element => $x) {
-                    if (isset($this->lookup[$element])) {
-                        $add += $this->lookup[$element];
-                        unset($this->lookup[$i][$element]);
-                    }
-                }
-                $this->lookup[$i] += $add;
-            }
-        }
-
-        foreach ($this->lookup as $key => $lookup) {
-            $this->info[$key] = implode(' | ', array_keys($lookup));
-        }
-        $this->keys   = array_keys($this->info);
-        $this->values = array_values($this->info);
-    }
-
-    /**
-     * Accepts a definition; generates and assigns a ChildDef for it
-     * @param $def HTMLPurifier_ElementDef reference
-     * @param $module Module that defined the ElementDef
-     */
-    public function generateChildDef(&$def, $module) {
-        if (!empty($def->child)) return; // already done!
-        $content_model = $def->content_model;
-        if (is_string($content_model)) {
-            // Assume that $this->keys is alphanumeric
-            $def->content_model = preg_replace_callback(
-                '/\b(' . implode('|', $this->keys) . ')\b/',
-                array($this, 'generateChildDefCallback'),
-                $content_model
-            );
-            //$def->content_model = str_replace(
-            //    $this->keys, $this->values, $content_model);
-        }
-        $def->child = $this->getChildDef($def, $module);
-    }
-
-    public function generateChildDefCallback($matches) {
-        return $this->info[$matches[0]];
-    }
-
-    /**
-     * Instantiates a ChildDef based on content_model and content_model_type
-     * member variables in HTMLPurifier_ElementDef
-     * @note This will also defer to modules for custom HTMLPurifier_ChildDef
-     *       subclasses that need content set expansion
-     * @param $def HTMLPurifier_ElementDef to have ChildDef extracted
-     * @return HTMLPurifier_ChildDef corresponding to ElementDef
-     */
-    public function getChildDef($def, $module) {
-        $value = $def->content_model;
-        if (is_object($value)) {
-            trigger_error(
-                'Literal object child definitions should be stored in '.
-                'ElementDef->child not ElementDef->content_model',
-                E_USER_NOTICE
-            );
-            return $value;
-        }
-        switch ($def->content_model_type) {
-            case 'required':
-                return new HTMLPurifier_ChildDef_Required($value);
-            case 'optional':
-                return new HTMLPurifier_ChildDef_Optional($value);
-            case 'empty':
-                return new HTMLPurifier_ChildDef_Empty();
-            case 'custom':
-                return new HTMLPurifier_ChildDef_Custom($value);
-        }
-        // defer to its module
-        $return = false;
-        if ($module->defines_child_def) { // save a func call
-            $return = $module->getChildDef($def);
-        }
-        if ($return !== false) return $return;
-        // error-out
-        trigger_error(
-            'Could not determine which ChildDef class to instantiate',
-            E_USER_ERROR
-        );
-        return false;
-    }
-
-    /**
-     * Converts a string list of elements separated by pipes into
-     * a lookup array.
-     * @param $string List of elements
-     * @return Lookup array of elements
-     */
-    protected function convertToLookup($string) {
-        $array = explode('|', str_replace(' ', '', $string));
-        $ret = array();
-        foreach ($array as $i => $k) {
-            $ret[$k] = true;
-        }
-        return $ret;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Context.php b/extlib/HTMLPurifier/HTMLPurifier/Context.php
deleted file mode 100644
index 9ddf0c5476..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Context.php
+++ /dev/null
@@ -1,82 +0,0 @@
-<?php
-
-/**
- * Registry object that contains information about the current context.
- * @warning Is a bit buggy when variables are set to null: it thinks
- *          they don't exist! So use false instead, please.
- * @note Since the variables Context deals with may not be objects,
- *       references are very important here! Do not remove!
- */
-class HTMLPurifier_Context
-{
-
-    /**
-     * Private array that stores the references.
-     */
-    private $_storage = array();
-
-    /**
-     * Registers a variable into the context.
-     * @param $name String name
-     * @param $ref Reference to variable to be registered
-     */
-    public function register($name, &$ref) {
-        if (isset($this->_storage[$name])) {
-            trigger_error("Name $name produces collision, cannot re-register",
-                          E_USER_ERROR);
-            return;
-        }
-        $this->_storage[$name] =& $ref;
-    }
-
-    /**
-     * Retrieves a variable reference from the context.
-     * @param $name String name
-     * @param $ignore_error Boolean whether or not to ignore error
-     */
-    public function &get($name, $ignore_error = false) {
-        if (!isset($this->_storage[$name])) {
-            if (!$ignore_error) {
-                trigger_error("Attempted to retrieve non-existent variable $name",
-                              E_USER_ERROR);
-            }
-            $var = null; // so we can return by reference
-            return $var;
-        }
-        return $this->_storage[$name];
-    }
-
-    /**
-     * Destorys a variable in the context.
-     * @param $name String name
-     */
-    public function destroy($name) {
-        if (!isset($this->_storage[$name])) {
-            trigger_error("Attempted to destroy non-existent variable $name",
-                          E_USER_ERROR);
-            return;
-        }
-        unset($this->_storage[$name]);
-    }
-
-    /**
-     * Checks whether or not the variable exists.
-     * @param $name String name
-     */
-    public function exists($name) {
-        return isset($this->_storage[$name]);
-    }
-
-    /**
-     * Loads a series of variables from an associative array
-     * @param $context_array Assoc array of variables to load
-     */
-    public function loadArray($context_array) {
-        foreach ($context_array as $key => $discard) {
-            $this->register($key, $context_array[$key]);
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Definition.php b/extlib/HTMLPurifier/HTMLPurifier/Definition.php
deleted file mode 100644
index a7408c9749..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Definition.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-/**
- * Super-class for definition datatype objects, implements serialization
- * functions for the class.
- */
-abstract class HTMLPurifier_Definition
-{
-
-    /**
-     * Has setup() been called yet?
-     */
-    public $setup = false;
-
-    /**
-     * What type of definition is it?
-     */
-    public $type;
-
-    /**
-     * Sets up the definition object into the final form, something
-     * not done by the constructor
-     * @param $config HTMLPurifier_Config instance
-     */
-    abstract protected function doSetup($config);
-
-    /**
-     * Setup function that aborts if already setup
-     * @param $config HTMLPurifier_Config instance
-     */
-    public function setup($config) {
-        if ($this->setup) return;
-        $this->setup = true;
-        $this->doSetup($config);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache.php b/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache.php
deleted file mode 100644
index c6e1e388c6..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache.php
+++ /dev/null
@@ -1,108 +0,0 @@
-<?php
-
-/**
- * Abstract class representing Definition cache managers that implements
- * useful common methods and is a factory.
- * @todo Create a separate maintenance file advanced users can use to
- *       cache their custom HTMLDefinition, which can be loaded
- *       via a configuration directive
- * @todo Implement memcached
- */
-abstract class HTMLPurifier_DefinitionCache
-{
-
-    public $type;
-
-    /**
-     * @param $name Type of definition objects this instance of the
-     *      cache will handle.
-     */
-    public function __construct($type) {
-        $this->type = $type;
-    }
-
-    /**
-     * Generates a unique identifier for a particular configuration
-     * @param Instance of HTMLPurifier_Config
-     */
-    public function generateKey($config) {
-        return $config->version . ',' . // possibly replace with function calls
-               $config->getBatchSerial($this->type) . ',' .
-               $config->get($this->type . '.DefinitionRev');
-    }
-
-    /**
-     * Tests whether or not a key is old with respect to the configuration's
-     * version and revision number.
-     * @param $key Key to test
-     * @param $config Instance of HTMLPurifier_Config to test against
-     */
-    public function isOld($key, $config) {
-        if (substr_count($key, ',') < 2) return true;
-        list($version, $hash, $revision) = explode(',', $key, 3);
-        $compare = version_compare($version, $config->version);
-        // version mismatch, is always old
-        if ($compare != 0) return true;
-        // versions match, ids match, check revision number
-        if (
-            $hash == $config->getBatchSerial($this->type) &&
-            $revision < $config->get($this->type . '.DefinitionRev')
-        ) return true;
-        return false;
-    }
-
-    /**
-     * Checks if a definition's type jives with the cache's type
-     * @note Throws an error on failure
-     * @param $def Definition object to check
-     * @return Boolean true if good, false if not
-     */
-    public function checkDefType($def) {
-        if ($def->type !== $this->type) {
-            trigger_error("Cannot use definition of type {$def->type} in cache for {$this->type}");
-            return false;
-        }
-        return true;
-    }
-
-    /**
-     * Adds a definition object to the cache
-     */
-    abstract public function add($def, $config);
-
-    /**
-     * Unconditionally saves a definition object to the cache
-     */
-    abstract public function set($def, $config);
-
-    /**
-     * Replace an object in the cache
-     */
-    abstract public function replace($def, $config);
-
-    /**
-     * Retrieves a definition object from the cache
-     */
-    abstract public function get($config);
-
-    /**
-     * Removes a definition object to the cache
-     */
-    abstract public function remove($config);
-
-    /**
-     * Clears all objects from cache
-     */
-    abstract public function flush($config);
-
-    /**
-     * Clears all expired (older version or revision) objects from cache
-     * @note Be carefuly implementing this method as flush. Flush must
-     *       not interfere with other Definition types, and cleanup()
-     *       should not be repeatedly called by userland code.
-     */
-    abstract public function cleanup($config);
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Decorator.php b/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Decorator.php
deleted file mode 100644
index b0fb6d0cd6..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Decorator.php
+++ /dev/null
@@ -1,62 +0,0 @@
-<?php
-
-class HTMLPurifier_DefinitionCache_Decorator extends HTMLPurifier_DefinitionCache
-{
-
-    /**
-     * Cache object we are decorating
-     */
-    public $cache;
-
-    public function __construct() {}
-
-    /**
-     * Lazy decorator function
-     * @param $cache Reference to cache object to decorate
-     */
-    public function decorate(&$cache) {
-        $decorator = $this->copy();
-        // reference is necessary for mocks in PHP 4
-        $decorator->cache =& $cache;
-        $decorator->type  = $cache->type;
-        return $decorator;
-    }
-
-    /**
-     * Cross-compatible clone substitute
-     */
-    public function copy() {
-        return new HTMLPurifier_DefinitionCache_Decorator();
-    }
-
-    public function add($def, $config) {
-        return $this->cache->add($def, $config);
-    }
-
-    public function set($def, $config) {
-        return $this->cache->set($def, $config);
-    }
-
-    public function replace($def, $config) {
-        return $this->cache->replace($def, $config);
-    }
-
-    public function get($config) {
-        return $this->cache->get($config);
-    }
-
-    public function remove($config) {
-        return $this->cache->remove($config);
-    }
-
-    public function flush($config) {
-        return $this->cache->flush($config);
-    }
-
-    public function cleanup($config) {
-        return $this->cache->cleanup($config);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Decorator/Cleanup.php b/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Decorator/Cleanup.php
deleted file mode 100644
index d4cc35c4bc..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Decorator/Cleanup.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php
-
-/**
- * Definition cache decorator class that cleans up the cache
- * whenever there is a cache miss.
- */
-class HTMLPurifier_DefinitionCache_Decorator_Cleanup extends
-      HTMLPurifier_DefinitionCache_Decorator
-{
-
-    public $name = 'Cleanup';
-
-    public function copy() {
-        return new HTMLPurifier_DefinitionCache_Decorator_Cleanup();
-    }
-
-    public function add($def, $config) {
-        $status = parent::add($def, $config);
-        if (!$status) parent::cleanup($config);
-        return $status;
-    }
-
-    public function set($def, $config) {
-        $status = parent::set($def, $config);
-        if (!$status) parent::cleanup($config);
-        return $status;
-    }
-
-    public function replace($def, $config) {
-        $status = parent::replace($def, $config);
-        if (!$status) parent::cleanup($config);
-        return $status;
-    }
-
-    public function get($config) {
-        $ret = parent::get($config);
-        if (!$ret) parent::cleanup($config);
-        return $ret;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Decorator/Memory.php b/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Decorator/Memory.php
deleted file mode 100644
index 18f16d32b6..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Decorator/Memory.php
+++ /dev/null
@@ -1,46 +0,0 @@
-<?php
-
-/**
- * Definition cache decorator class that saves all cache retrievals
- * to PHP's memory; good for unit tests or circumstances where
- * there are lots of configuration objects floating around.
- */
-class HTMLPurifier_DefinitionCache_Decorator_Memory extends
-      HTMLPurifier_DefinitionCache_Decorator
-{
-
-    protected $definitions;
-    public $name = 'Memory';
-
-    public function copy() {
-        return new HTMLPurifier_DefinitionCache_Decorator_Memory();
-    }
-
-    public function add($def, $config) {
-        $status = parent::add($def, $config);
-        if ($status) $this->definitions[$this->generateKey($config)] = $def;
-        return $status;
-    }
-
-    public function set($def, $config) {
-        $status = parent::set($def, $config);
-        if ($status) $this->definitions[$this->generateKey($config)] = $def;
-        return $status;
-    }
-
-    public function replace($def, $config) {
-        $status = parent::replace($def, $config);
-        if ($status) $this->definitions[$this->generateKey($config)] = $def;
-        return $status;
-    }
-
-    public function get($config) {
-        $key = $this->generateKey($config);
-        if (isset($this->definitions[$key])) return $this->definitions[$key];
-        $this->definitions[$key] = parent::get($config);
-        return $this->definitions[$key];
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Decorator/Template.php.in b/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Decorator/Template.php.in
deleted file mode 100644
index 21a8fcfda2..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Decorator/Template.php.in
+++ /dev/null
@@ -1,47 +0,0 @@
-<?php
-
-require_once 'HTMLPurifier/DefinitionCache/Decorator.php';
-
-/**
- * Definition cache decorator template.
- */
-class HTMLPurifier_DefinitionCache_Decorator_Template extends
-      HTMLPurifier_DefinitionCache_Decorator
-{
-
-    var $name = 'Template'; // replace this
-
-    function copy() {
-        // replace class name with yours
-        return new HTMLPurifier_DefinitionCache_Decorator_Template();
-    }
-
-    // remove methods you don't need
-
-    function add($def, $config) {
-        return parent::add($def, $config);
-    }
-
-    function set($def, $config) {
-        return parent::set($def, $config);
-    }
-
-    function replace($def, $config) {
-        return parent::replace($def, $config);
-    }
-
-    function get($config) {
-        return parent::get($config);
-    }
-
-    function flush() {
-        return parent::flush();
-    }
-
-    function cleanup($config) {
-        return parent::cleanup($config);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Null.php b/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Null.php
deleted file mode 100644
index 41d97e734f..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Null.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-/**
- * Null cache object to use when no caching is on.
- */
-class HTMLPurifier_DefinitionCache_Null extends HTMLPurifier_DefinitionCache
-{
-
-    public function add($def, $config) {
-        return false;
-    }
-
-    public function set($def, $config) {
-        return false;
-    }
-
-    public function replace($def, $config) {
-        return false;
-    }
-
-    public function remove($config) {
-        return false;
-    }
-
-    public function get($config) {
-        return false;
-    }
-
-    public function flush($config) {
-        return false;
-    }
-
-    public function cleanup($config) {
-        return false;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Serializer.php b/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Serializer.php
deleted file mode 100644
index 7a6aa93f02..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Serializer.php
+++ /dev/null
@@ -1,172 +0,0 @@
-<?php
-
-class HTMLPurifier_DefinitionCache_Serializer extends
-      HTMLPurifier_DefinitionCache
-{
-
-    public function add($def, $config) {
-        if (!$this->checkDefType($def)) return;
-        $file = $this->generateFilePath($config);
-        if (file_exists($file)) return false;
-        if (!$this->_prepareDir($config)) return false;
-        return $this->_write($file, serialize($def));
-    }
-
-    public function set($def, $config) {
-        if (!$this->checkDefType($def)) return;
-        $file = $this->generateFilePath($config);
-        if (!$this->_prepareDir($config)) return false;
-        return $this->_write($file, serialize($def));
-    }
-
-    public function replace($def, $config) {
-        if (!$this->checkDefType($def)) return;
-        $file = $this->generateFilePath($config);
-        if (!file_exists($file)) return false;
-        if (!$this->_prepareDir($config)) return false;
-        return $this->_write($file, serialize($def));
-    }
-
-    public function get($config) {
-        $file = $this->generateFilePath($config);
-        if (!file_exists($file)) return false;
-        return unserialize(file_get_contents($file));
-    }
-
-    public function remove($config) {
-        $file = $this->generateFilePath($config);
-        if (!file_exists($file)) return false;
-        return unlink($file);
-    }
-
-    public function flush($config) {
-        if (!$this->_prepareDir($config)) return false;
-        $dir = $this->generateDirectoryPath($config);
-        $dh  = opendir($dir);
-        while (false !== ($filename = readdir($dh))) {
-            if (empty($filename)) continue;
-            if ($filename[0] === '.') continue;
-            unlink($dir . '/' . $filename);
-        }
-    }
-
-    public function cleanup($config) {
-        if (!$this->_prepareDir($config)) return false;
-        $dir = $this->generateDirectoryPath($config);
-        $dh  = opendir($dir);
-        while (false !== ($filename = readdir($dh))) {
-            if (empty($filename)) continue;
-            if ($filename[0] === '.') continue;
-            $key = substr($filename, 0, strlen($filename) - 4);
-            if ($this->isOld($key, $config)) unlink($dir . '/' . $filename);
-        }
-    }
-
-    /**
-     * Generates the file path to the serial file corresponding to
-     * the configuration and definition name
-     * @todo Make protected
-     */
-    public function generateFilePath($config) {
-        $key = $this->generateKey($config);
-        return $this->generateDirectoryPath($config) . '/' . $key . '.ser';
-    }
-
-    /**
-     * Generates the path to the directory contain this cache's serial files
-     * @note No trailing slash
-     * @todo Make protected
-     */
-    public function generateDirectoryPath($config) {
-        $base = $this->generateBaseDirectoryPath($config);
-        return $base . '/' . $this->type;
-    }
-
-    /**
-     * Generates path to base directory that contains all definition type
-     * serials
-     * @todo Make protected
-     */
-    public function generateBaseDirectoryPath($config) {
-        $base = $config->get('Cache.SerializerPath');
-        $base = is_null($base) ? HTMLPURIFIER_PREFIX . '/HTMLPurifier/DefinitionCache/Serializer' : $base;
-        return $base;
-    }
-
-    /**
-     * Convenience wrapper function for file_put_contents
-     * @param $file File name to write to
-     * @param $data Data to write into file
-     * @return Number of bytes written if success, or false if failure.
-     */
-    private function _write($file, $data) {
-        return file_put_contents($file, $data);
-    }
-
-    /**
-     * Prepares the directory that this type stores the serials in
-     * @return True if successful
-     */
-    private function _prepareDir($config) {
-        $directory = $this->generateDirectoryPath($config);
-        if (!is_dir($directory)) {
-            $base = $this->generateBaseDirectoryPath($config);
-            if (!is_dir($base)) {
-                trigger_error('Base directory '.$base.' does not exist,
-                    please create or change using %Cache.SerializerPath',
-                    E_USER_WARNING);
-                return false;
-            } elseif (!$this->_testPermissions($base)) {
-                return false;
-            }
-            $old = umask(0022); // disable group and world writes
-            mkdir($directory);
-            umask($old);
-        } elseif (!$this->_testPermissions($directory)) {
-            return false;
-        }
-        return true;
-    }
-
-    /**
-     * Tests permissions on a directory and throws out friendly
-     * error messages and attempts to chmod it itself if possible
-     */
-    private function _testPermissions($dir) {
-        // early abort, if it is writable, everything is hunky-dory
-        if (is_writable($dir)) return true;
-        if (!is_dir($dir)) {
-            // generally, you'll want to handle this beforehand
-            // so a more specific error message can be given
-            trigger_error('Directory '.$dir.' does not exist',
-                E_USER_WARNING);
-            return false;
-        }
-        if (function_exists('posix_getuid')) {
-            // POSIX system, we can give more specific advice
-            if (fileowner($dir) === posix_getuid()) {
-                // we can chmod it ourselves
-                chmod($dir, 0755);
-                return true;
-            } elseif (filegroup($dir) === posix_getgid()) {
-                $chmod = '775';
-            } else {
-                // PHP's probably running as nobody, so we'll
-                // need to give global permissions
-                $chmod = '777';
-            }
-            trigger_error('Directory '.$dir.' not writable, '.
-                'please chmod to ' . $chmod,
-                E_USER_WARNING);
-        } else {
-            // generic error message
-            trigger_error('Directory '.$dir.' not writable, '.
-                'please alter file permissions',
-                E_USER_WARNING);
-        }
-        return false;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Serializer/README b/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Serializer/README
deleted file mode 100755
index 2e35c1c3d0..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCache/Serializer/README
+++ /dev/null
@@ -1,3 +0,0 @@
-This is a dummy file to prevent Git from ignoring this empty directory.
-
-    vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCacheFactory.php b/extlib/HTMLPurifier/HTMLPurifier/DefinitionCacheFactory.php
deleted file mode 100644
index a6ead62818..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/DefinitionCacheFactory.php
+++ /dev/null
@@ -1,91 +0,0 @@
-<?php
-
-/**
- * Responsible for creating definition caches.
- */
-class HTMLPurifier_DefinitionCacheFactory
-{
-
-    protected $caches = array('Serializer' => array());
-    protected $implementations = array();
-    protected $decorators = array();
-
-    /**
-     * Initialize default decorators
-     */
-    public function setup() {
-        $this->addDecorator('Cleanup');
-    }
-
-    /**
-     * Retrieves an instance of global definition cache factory.
-     */
-    public static function instance($prototype = null) {
-        static $instance;
-        if ($prototype !== null) {
-            $instance = $prototype;
-        } elseif ($instance === null || $prototype === true) {
-            $instance = new HTMLPurifier_DefinitionCacheFactory();
-            $instance->setup();
-        }
-        return $instance;
-    }
-
-    /**
-     * Registers a new definition cache object
-     * @param $short Short name of cache object, for reference
-     * @param $long Full class name of cache object, for construction
-     */
-    public function register($short, $long) {
-        $this->implementations[$short] = $long;
-    }
-
-    /**
-     * Factory method that creates a cache object based on configuration
-     * @param $name Name of definitions handled by cache
-     * @param $config Instance of HTMLPurifier_Config
-     */
-    public function create($type, $config) {
-        $method = $config->get('Cache.DefinitionImpl');
-        if ($method === null) {
-            return new HTMLPurifier_DefinitionCache_Null($type);
-        }
-        if (!empty($this->caches[$method][$type])) {
-            return $this->caches[$method][$type];
-        }
-        if (
-          isset($this->implementations[$method]) &&
-          class_exists($class = $this->implementations[$method], false)
-        ) {
-            $cache = new $class($type);
-        } else {
-            if ($method != 'Serializer') {
-                trigger_error("Unrecognized DefinitionCache $method, using Serializer instead", E_USER_WARNING);
-            }
-            $cache = new HTMLPurifier_DefinitionCache_Serializer($type);
-        }
-        foreach ($this->decorators as $decorator) {
-            $new_cache = $decorator->decorate($cache);
-            // prevent infinite recursion in PHP 4
-            unset($cache);
-            $cache = $new_cache;
-        }
-        $this->caches[$method][$type] = $cache;
-        return $this->caches[$method][$type];
-    }
-
-    /**
-     * Registers a decorator to add to all new cache objects
-     * @param
-     */
-    public function addDecorator($decorator) {
-        if (is_string($decorator)) {
-            $class = "HTMLPurifier_DefinitionCache_Decorator_$decorator";
-            $decorator = new $class;
-        }
-        $this->decorators[$decorator->name] = $decorator;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Doctype.php b/extlib/HTMLPurifier/HTMLPurifier/Doctype.php
deleted file mode 100644
index 1e3c574c06..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Doctype.php
+++ /dev/null
@@ -1,60 +0,0 @@
-<?php
-
-/**
- * Represents a document type, contains information on which modules
- * need to be loaded.
- * @note This class is inspected by Printer_HTMLDefinition->renderDoctype.
- *       If structure changes, please update that function.
- */
-class HTMLPurifier_Doctype
-{
-    /**
-     * Full name of doctype
-     */
-    public $name;
-
-    /**
-     * List of standard modules (string identifiers or literal objects)
-     * that this doctype uses
-     */
-    public $modules = array();
-
-    /**
-     * List of modules to use for tidying up code
-     */
-    public $tidyModules = array();
-
-    /**
-     * Is the language derived from XML (i.e. XHTML)?
-     */
-    public $xml = true;
-
-    /**
-     * List of aliases for this doctype
-     */
-    public $aliases = array();
-
-    /**
-     * Public DTD identifier
-     */
-    public $dtdPublic;
-
-    /**
-     * System DTD identifier
-     */
-    public $dtdSystem;
-
-    public function __construct($name = null, $xml = true, $modules = array(),
-        $tidyModules = array(), $aliases = array(), $dtd_public = null, $dtd_system = null
-    ) {
-        $this->name         = $name;
-        $this->xml          = $xml;
-        $this->modules      = $modules;
-        $this->tidyModules  = $tidyModules;
-        $this->aliases      = $aliases;
-        $this->dtdPublic    = $dtd_public;
-        $this->dtdSystem    = $dtd_system;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/DoctypeRegistry.php b/extlib/HTMLPurifier/HTMLPurifier/DoctypeRegistry.php
deleted file mode 100644
index 86049e9391..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/DoctypeRegistry.php
+++ /dev/null
@@ -1,103 +0,0 @@
-<?php
-
-class HTMLPurifier_DoctypeRegistry
-{
-
-    /**
-     * Hash of doctype names to doctype objects
-     */
-    protected $doctypes;
-
-    /**
-     * Lookup table of aliases to real doctype names
-     */
-    protected $aliases;
-
-    /**
-     * Registers a doctype to the registry
-     * @note Accepts a fully-formed doctype object, or the
-     *       parameters for constructing a doctype object
-     * @param $doctype Name of doctype or literal doctype object
-     * @param $modules Modules doctype will load
-     * @param $modules_for_modes Modules doctype will load for certain modes
-     * @param $aliases Alias names for doctype
-     * @return Editable registered doctype
-     */
-    public function register($doctype, $xml = true, $modules = array(),
-        $tidy_modules = array(), $aliases = array(), $dtd_public = null, $dtd_system = null
-    ) {
-        if (!is_array($modules)) $modules = array($modules);
-        if (!is_array($tidy_modules)) $tidy_modules = array($tidy_modules);
-        if (!is_array($aliases)) $aliases = array($aliases);
-        if (!is_object($doctype)) {
-            $doctype = new HTMLPurifier_Doctype(
-                $doctype, $xml, $modules, $tidy_modules, $aliases, $dtd_public, $dtd_system
-            );
-        }
-        $this->doctypes[$doctype->name] = $doctype;
-        $name = $doctype->name;
-        // hookup aliases
-        foreach ($doctype->aliases as $alias) {
-            if (isset($this->doctypes[$alias])) continue;
-            $this->aliases[$alias] = $name;
-        }
-        // remove old aliases
-        if (isset($this->aliases[$name])) unset($this->aliases[$name]);
-        return $doctype;
-    }
-
-    /**
-     * Retrieves reference to a doctype of a certain name
-     * @note This function resolves aliases
-     * @note When possible, use the more fully-featured make()
-     * @param $doctype Name of doctype
-     * @return Editable doctype object
-     */
-    public function get($doctype) {
-        if (isset($this->aliases[$doctype])) $doctype = $this->aliases[$doctype];
-        if (!isset($this->doctypes[$doctype])) {
-            trigger_error('Doctype ' . htmlspecialchars($doctype) . ' does not exist', E_USER_ERROR);
-            $anon = new HTMLPurifier_Doctype($doctype);
-            return $anon;
-        }
-        return $this->doctypes[$doctype];
-    }
-
-    /**
-     * Creates a doctype based on a configuration object,
-     * will perform initialization on the doctype
-     * @note Use this function to get a copy of doctype that config
-     *       can hold on to (this is necessary in order to tell
-     *       Generator whether or not the current document is XML
-     *       based or not).
-     */
-    public function make($config) {
-        return clone $this->get($this->getDoctypeFromConfig($config));
-    }
-
-    /**
-     * Retrieves the doctype from the configuration object
-     */
-    public function getDoctypeFromConfig($config) {
-        // recommended test
-        $doctype = $config->get('HTML.Doctype');
-        if (!empty($doctype)) return $doctype;
-        $doctype = $config->get('HTML.CustomDoctype');
-        if (!empty($doctype)) return $doctype;
-        // backwards-compatibility
-        if ($config->get('HTML.XHTML')) {
-            $doctype = 'XHTML 1.0';
-        } else {
-            $doctype = 'HTML 4.01';
-        }
-        if ($config->get('HTML.Strict')) {
-            $doctype .= ' Strict';
-        } else {
-            $doctype .= ' Transitional';
-        }
-        return $doctype;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ElementDef.php b/extlib/HTMLPurifier/HTMLPurifier/ElementDef.php
deleted file mode 100644
index aede2c3bb4..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ElementDef.php
+++ /dev/null
@@ -1,176 +0,0 @@
-<?php
-
-/**
- * Structure that stores an HTML element definition. Used by
- * HTMLPurifier_HTMLDefinition and HTMLPurifier_HTMLModule.
- * @note This class is inspected by HTMLPurifier_Printer_HTMLDefinition.
- *       Please update that class too.
- * @warning If you add new properties to this class, you MUST update
- *          the mergeIn() method.
- */
-class HTMLPurifier_ElementDef
-{
-
-    /**
-     * Does the definition work by itself, or is it created solely
-     * for the purpose of merging into another definition?
-     */
-    public $standalone = true;
-
-    /**
-     * Associative array of attribute name to HTMLPurifier_AttrDef
-     * @note Before being processed by HTMLPurifier_AttrCollections
-     *       when modules are finalized during
-     *       HTMLPurifier_HTMLDefinition->setup(), this array may also
-     *       contain an array at index 0 that indicates which attribute
-     *       collections to load into the full array. It may also
-     *       contain string indentifiers in lieu of HTMLPurifier_AttrDef,
-     *       see HTMLPurifier_AttrTypes on how they are expanded during
-     *       HTMLPurifier_HTMLDefinition->setup() processing.
-     */
-    public $attr = array();
-
-    /**
-     * Indexed list of tag's HTMLPurifier_AttrTransform to be done before validation
-     */
-    public $attr_transform_pre = array();
-
-    /**
-     * Indexed list of tag's HTMLPurifier_AttrTransform to be done after validation
-     */
-    public $attr_transform_post = array();
-
-    /**
-     * HTMLPurifier_ChildDef of this tag.
-     */
-    public $child;
-
-    /**
-     * Abstract string representation of internal ChildDef rules. See
-     * HTMLPurifier_ContentSets for how this is parsed and then transformed
-     * into an HTMLPurifier_ChildDef.
-     * @warning This is a temporary variable that is not available after
-     *      being processed by HTMLDefinition
-     */
-    public $content_model;
-
-    /**
-     * Value of $child->type, used to determine which ChildDef to use,
-     * used in combination with $content_model.
-     * @warning This must be lowercase
-     * @warning This is a temporary variable that is not available after
-     *      being processed by HTMLDefinition
-     */
-    public $content_model_type;
-
-
-
-    /**
-     * Does the element have a content model (#PCDATA | Inline)*? This
-     * is important for chameleon ins and del processing in
-     * HTMLPurifier_ChildDef_Chameleon. Dynamically set: modules don't
-     * have to worry about this one.
-     */
-    public $descendants_are_inline = false;
-
-    /**
-     * List of the names of required attributes this element has. Dynamically
-     * populated by HTMLPurifier_HTMLDefinition::getElement
-     */
-    public $required_attr = array();
-
-    /**
-     * Lookup table of tags excluded from all descendants of this tag.
-     * @note SGML permits exclusions for all descendants, but this is
-     *       not possible with DTDs or XML Schemas. W3C has elected to
-     *       use complicated compositions of content_models to simulate
-     *       exclusion for children, but we go the simpler, SGML-style
-     *       route of flat-out exclusions, which correctly apply to
-     *       all descendants and not just children. Note that the XHTML
-     *       Modularization Abstract Modules are blithely unaware of such
-     *       distinctions.
-     */
-    public $excludes = array();
-
-    /**
-     * This tag is explicitly auto-closed by the following tags.
-     */
-    public $autoclose = array();
-
-    /**
-     * Whether or not this is a formatting element affected by the
-     * "Active Formatting Elements" algorithm.
-     */
-    public $formatting;
-
-    /**
-     * Low-level factory constructor for creating new standalone element defs
-     */
-    public static function create($content_model, $content_model_type, $attr) {
-        $def = new HTMLPurifier_ElementDef();
-        $def->content_model = $content_model;
-        $def->content_model_type = $content_model_type;
-        $def->attr = $attr;
-        return $def;
-    }
-
-    /**
-     * Merges the values of another element definition into this one.
-     * Values from the new element def take precedence if a value is
-     * not mergeable.
-     */
-    public function mergeIn($def) {
-
-        // later keys takes precedence
-        foreach($def->attr as $k => $v) {
-            if ($k === 0) {
-                // merge in the includes
-                // sorry, no way to override an include
-                foreach ($v as $v2) {
-                    $this->attr[0][] = $v2;
-                }
-                continue;
-            }
-            if ($v === false) {
-                if (isset($this->attr[$k])) unset($this->attr[$k]);
-                continue;
-            }
-            $this->attr[$k] = $v;
-        }
-        $this->_mergeAssocArray($this->attr_transform_pre, $def->attr_transform_pre);
-        $this->_mergeAssocArray($this->attr_transform_post, $def->attr_transform_post);
-        $this->_mergeAssocArray($this->excludes, $def->excludes);
-
-        if(!empty($def->content_model)) {
-            $this->content_model =
-                str_replace("#SUPER", $this->content_model, $def->content_model);
-            $this->child = false;
-        }
-        if(!empty($def->content_model_type)) {
-            $this->content_model_type = $def->content_model_type;
-            $this->child = false;
-        }
-        if(!is_null($def->child)) $this->child = $def->child;
-        if(!is_null($def->formatting)) $this->formatting = $def->formatting;
-        if($def->descendants_are_inline) $this->descendants_are_inline = $def->descendants_are_inline;
-
-    }
-
-    /**
-     * Merges one array into another, removes values which equal false
-     * @param $a1 Array by reference that is merged into
-     * @param $a2 Array that merges into $a1
-     */
-    private function _mergeAssocArray(&$a1, $a2) {
-        foreach ($a2 as $k => $v) {
-            if ($v === false) {
-                if (isset($a1[$k])) unset($a1[$k]);
-                continue;
-            }
-            $a1[$k] = $v;
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Encoder.php b/extlib/HTMLPurifier/HTMLPurifier/Encoder.php
deleted file mode 100644
index 2b3140caaf..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Encoder.php
+++ /dev/null
@@ -1,426 +0,0 @@
-<?php
-
-/**
- * A UTF-8 specific character encoder that handles cleaning and transforming.
- * @note All functions in this class should be static.
- */
-class HTMLPurifier_Encoder
-{
-
-    /**
-     * Constructor throws fatal error if you attempt to instantiate class
-     */
-    private function __construct() {
-        trigger_error('Cannot instantiate encoder, call methods statically', E_USER_ERROR);
-    }
-
-    /**
-     * Error-handler that mutes errors, alternative to shut-up operator.
-     */
-    public static function muteErrorHandler() {}
-
-    /**
-     * Cleans a UTF-8 string for well-formedness and SGML validity
-     *
-     * It will parse according to UTF-8 and return a valid UTF8 string, with
-     * non-SGML codepoints excluded.
-     *
-     * @note Just for reference, the non-SGML code points are 0 to 31 and
-     *       127 to 159, inclusive.  However, we allow code points 9, 10
-     *       and 13, which are the tab, line feed and carriage return
-     *       respectively. 128 and above the code points map to multibyte
-     *       UTF-8 representations.
-     *
-     * @note Fallback code adapted from utf8ToUnicode by Henri Sivonen and
-     *       hsivonen@iki.fi at <http://iki.fi/hsivonen/php-utf8/> under the
-     *       LGPL license.  Notes on what changed are inside, but in general,
-     *       the original code transformed UTF-8 text into an array of integer
-     *       Unicode codepoints. Understandably, transforming that back to
-     *       a string would be somewhat expensive, so the function was modded to
-     *       directly operate on the string.  However, this discourages code
-     *       reuse, and the logic enumerated here would be useful for any
-     *       function that needs to be able to understand UTF-8 characters.
-     *       As of right now, only smart lossless character encoding converters
-     *       would need that, and I'm probably not going to implement them.
-     *       Once again, PHP 6 should solve all our problems.
-     */
-    public static function cleanUTF8($str, $force_php = false) {
-
-        // UTF-8 validity is checked since PHP 4.3.5
-        // This is an optimization: if the string is already valid UTF-8, no
-        // need to do PHP stuff. 99% of the time, this will be the case.
-        // The regexp matches the XML char production, as well as well as excluding
-        // non-SGML codepoints U+007F to U+009F
-        if (preg_match('/^[\x{9}\x{A}\x{D}\x{20}-\x{7E}\x{A0}-\x{D7FF}\x{E000}-\x{FFFD}\x{10000}-\x{10FFFF}]*$/Du', $str)) {
-            return $str;
-        }
-
-        $mState = 0; // cached expected number of octets after the current octet
-                     // until the beginning of the next UTF8 character sequence
-        $mUcs4  = 0; // cached Unicode character
-        $mBytes = 1; // cached expected number of octets in the current sequence
-
-        // original code involved an $out that was an array of Unicode
-        // codepoints.  Instead of having to convert back into UTF-8, we've
-        // decided to directly append valid UTF-8 characters onto a string
-        // $out once they're done.  $char accumulates raw bytes, while $mUcs4
-        // turns into the Unicode code point, so there's some redundancy.
-
-        $out = '';
-        $char = '';
-
-        $len = strlen($str);
-        for($i = 0; $i < $len; $i++) {
-            $in = ord($str{$i});
-            $char .= $str[$i]; // append byte to char
-            if (0 == $mState) {
-                // When mState is zero we expect either a US-ASCII character
-                // or a multi-octet sequence.
-                if (0 == (0x80 & ($in))) {
-                    // US-ASCII, pass straight through.
-                    if (($in <= 31 || $in == 127) &&
-                        !($in == 9 || $in == 13 || $in == 10) // save \r\t\n
-                    ) {
-                        // control characters, remove
-                    } else {
-                        $out .= $char;
-                    }
-                    // reset
-                    $char = '';
-                    $mBytes = 1;
-                } elseif (0xC0 == (0xE0 & ($in))) {
-                    // First octet of 2 octet sequence
-                    $mUcs4 = ($in);
-                    $mUcs4 = ($mUcs4 & 0x1F) << 6;
-                    $mState = 1;
-                    $mBytes = 2;
-                } elseif (0xE0 == (0xF0 & ($in))) {
-                    // First octet of 3 octet sequence
-                    $mUcs4 = ($in);
-                    $mUcs4 = ($mUcs4 & 0x0F) << 12;
-                    $mState = 2;
-                    $mBytes = 3;
-                } elseif (0xF0 == (0xF8 & ($in))) {
-                    // First octet of 4 octet sequence
-                    $mUcs4 = ($in);
-                    $mUcs4 = ($mUcs4 & 0x07) << 18;
-                    $mState = 3;
-                    $mBytes = 4;
-                } elseif (0xF8 == (0xFC & ($in))) {
-                    // First octet of 5 octet sequence.
-                    //
-                    // This is illegal because the encoded codepoint must be
-                    // either:
-                    // (a) not the shortest form or
-                    // (b) outside the Unicode range of 0-0x10FFFF.
-                    // Rather than trying to resynchronize, we will carry on
-                    // until the end of the sequence and let the later error
-                    // handling code catch it.
-                    $mUcs4 = ($in);
-                    $mUcs4 = ($mUcs4 & 0x03) << 24;
-                    $mState = 4;
-                    $mBytes = 5;
-                } elseif (0xFC == (0xFE & ($in))) {
-                    // First octet of 6 octet sequence, see comments for 5
-                    // octet sequence.
-                    $mUcs4 = ($in);
-                    $mUcs4 = ($mUcs4 & 1) << 30;
-                    $mState = 5;
-                    $mBytes = 6;
-                } else {
-                    // Current octet is neither in the US-ASCII range nor a
-                    // legal first octet of a multi-octet sequence.
-                    $mState = 0;
-                    $mUcs4  = 0;
-                    $mBytes = 1;
-                    $char = '';
-                }
-            } else {
-                // When mState is non-zero, we expect a continuation of the
-                // multi-octet sequence
-                if (0x80 == (0xC0 & ($in))) {
-                    // Legal continuation.
-                    $shift = ($mState - 1) * 6;
-                    $tmp = $in;
-                    $tmp = ($tmp & 0x0000003F) << $shift;
-                    $mUcs4 |= $tmp;
-
-                    if (0 == --$mState) {
-                        // End of the multi-octet sequence. mUcs4 now contains
-                        // the final Unicode codepoint to be output
-
-                        // Check for illegal sequences and codepoints.
-
-                        // From Unicode 3.1, non-shortest form is illegal
-                        if (((2 == $mBytes) && ($mUcs4 < 0x0080)) ||
-                            ((3 == $mBytes) && ($mUcs4 < 0x0800)) ||
-                            ((4 == $mBytes) && ($mUcs4 < 0x10000)) ||
-                            (4 < $mBytes) ||
-                            // From Unicode 3.2, surrogate characters = illegal
-                            (($mUcs4 & 0xFFFFF800) == 0xD800) ||
-                            // Codepoints outside the Unicode range are illegal
-                            ($mUcs4 > 0x10FFFF)
-                        ) {
-
-                        } elseif (0xFEFF != $mUcs4 && // omit BOM
-                            // check for valid Char unicode codepoints
-                            (
-                                0x9 == $mUcs4 ||
-                                0xA == $mUcs4 ||
-                                0xD == $mUcs4 ||
-                                (0x20 <= $mUcs4 && 0x7E >= $mUcs4) ||
-                                // 7F-9F is not strictly prohibited by XML,
-                                // but it is non-SGML, and thus we don't allow it
-                                (0xA0 <= $mUcs4 && 0xD7FF >= $mUcs4) ||
-                                (0x10000 <= $mUcs4 && 0x10FFFF >= $mUcs4)
-                            )
-                        ) {
-                            $out .= $char;
-                        }
-                        // initialize UTF8 cache (reset)
-                        $mState = 0;
-                        $mUcs4  = 0;
-                        $mBytes = 1;
-                        $char = '';
-                    }
-                } else {
-                    // ((0xC0 & (*in) != 0x80) && (mState != 0))
-                    // Incomplete multi-octet sequence.
-                    // used to result in complete fail, but we'll reset
-                    $mState = 0;
-                    $mUcs4  = 0;
-                    $mBytes = 1;
-                    $char ='';
-                }
-            }
-        }
-        return $out;
-    }
-
-    /**
-     * Translates a Unicode codepoint into its corresponding UTF-8 character.
-     * @note Based on Feyd's function at
-     *       <http://forums.devnetwork.net/viewtopic.php?p=191404#191404>,
-     *       which is in public domain.
-     * @note While we're going to do code point parsing anyway, a good
-     *       optimization would be to refuse to translate code points that
-     *       are non-SGML characters.  However, this could lead to duplication.
-     * @note This is very similar to the unichr function in
-     *       maintenance/generate-entity-file.php (although this is superior,
-     *       due to its sanity checks).
-     */
-
-    // +----------+----------+----------+----------+
-    // | 33222222 | 22221111 | 111111   |          |
-    // | 10987654 | 32109876 | 54321098 | 76543210 | bit
-    // +----------+----------+----------+----------+
-    // |          |          |          | 0xxxxxxx | 1 byte 0x00000000..0x0000007F
-    // |          |          | 110yyyyy | 10xxxxxx | 2 byte 0x00000080..0x000007FF
-    // |          | 1110zzzz | 10yyyyyy | 10xxxxxx | 3 byte 0x00000800..0x0000FFFF
-    // | 11110www | 10wwzzzz | 10yyyyyy | 10xxxxxx | 4 byte 0x00010000..0x0010FFFF
-    // +----------+----------+----------+----------+
-    // | 00000000 | 00011111 | 11111111 | 11111111 | Theoretical upper limit of legal scalars: 2097151 (0x001FFFFF)
-    // | 00000000 | 00010000 | 11111111 | 11111111 | Defined upper limit of legal scalar codes
-    // +----------+----------+----------+----------+
-
-    public static function unichr($code) {
-        if($code > 1114111 or $code < 0 or
-          ($code >= 55296 and $code <= 57343) ) {
-            // bits are set outside the "valid" range as defined
-            // by UNICODE 4.1.0
-            return '';
-        }
-
-        $x = $y = $z = $w = 0;
-        if ($code < 128) {
-            // regular ASCII character
-            $x = $code;
-        } else {
-            // set up bits for UTF-8
-            $x = ($code & 63) | 128;
-            if ($code < 2048) {
-                $y = (($code & 2047) >> 6) | 192;
-            } else {
-                $y = (($code & 4032) >> 6) | 128;
-                if($code < 65536) {
-                    $z = (($code >> 12) & 15) | 224;
-                } else {
-                    $z = (($code >> 12) & 63) | 128;
-                    $w = (($code >> 18) & 7)  | 240;
-                }
-            }
-        }
-        // set up the actual character
-        $ret = '';
-        if($w) $ret .= chr($w);
-        if($z) $ret .= chr($z);
-        if($y) $ret .= chr($y);
-        $ret .= chr($x);
-
-        return $ret;
-    }
-
-    /**
-     * Converts a string to UTF-8 based on configuration.
-     */
-    public static function convertToUTF8($str, $config, $context) {
-        $encoding = $config->get('Core.Encoding');
-        if ($encoding === 'utf-8') return $str;
-        static $iconv = null;
-        if ($iconv === null) $iconv = function_exists('iconv');
-        set_error_handler(array('HTMLPurifier_Encoder', 'muteErrorHandler'));
-        if ($iconv && !$config->get('Test.ForceNoIconv')) {
-            $str = iconv($encoding, 'utf-8//IGNORE', $str);
-            if ($str === false) {
-                // $encoding is not a valid encoding
-                restore_error_handler();
-                trigger_error('Invalid encoding ' . $encoding, E_USER_ERROR);
-                return '';
-            }
-            // If the string is bjorked by Shift_JIS or a similar encoding
-            // that doesn't support all of ASCII, convert the naughty
-            // characters to their true byte-wise ASCII/UTF-8 equivalents.
-            $str = strtr($str, HTMLPurifier_Encoder::testEncodingSupportsASCII($encoding));
-            restore_error_handler();
-            return $str;
-        } elseif ($encoding === 'iso-8859-1') {
-            $str = utf8_encode($str);
-            restore_error_handler();
-            return $str;
-        }
-        trigger_error('Encoding not supported, please install iconv', E_USER_ERROR);
-    }
-
-    /**
-     * Converts a string from UTF-8 based on configuration.
-     * @note Currently, this is a lossy conversion, with unexpressable
-     *       characters being omitted.
-     */
-    public static function convertFromUTF8($str, $config, $context) {
-        $encoding = $config->get('Core.Encoding');
-        if ($encoding === 'utf-8') return $str;
-        static $iconv = null;
-        if ($iconv === null) $iconv = function_exists('iconv');
-        if ($escape = $config->get('Core.EscapeNonASCIICharacters')) {
-            $str = HTMLPurifier_Encoder::convertToASCIIDumbLossless($str);
-        }
-        set_error_handler(array('HTMLPurifier_Encoder', 'muteErrorHandler'));
-        if ($iconv && !$config->get('Test.ForceNoIconv')) {
-            // Undo our previous fix in convertToUTF8, otherwise iconv will barf
-            $ascii_fix = HTMLPurifier_Encoder::testEncodingSupportsASCII($encoding);
-            if (!$escape && !empty($ascii_fix)) {
-                $clear_fix = array();
-                foreach ($ascii_fix as $utf8 => $native) $clear_fix[$utf8] = '';
-                $str = strtr($str, $clear_fix);
-            }
-            $str = strtr($str, array_flip($ascii_fix));
-            // Normal stuff
-            $str = iconv('utf-8', $encoding . '//IGNORE', $str);
-            restore_error_handler();
-            return $str;
-        } elseif ($encoding === 'iso-8859-1') {
-            $str = utf8_decode($str);
-            restore_error_handler();
-            return $str;
-        }
-        trigger_error('Encoding not supported', E_USER_ERROR);
-    }
-
-    /**
-     * Lossless (character-wise) conversion of HTML to ASCII
-     * @param $str UTF-8 string to be converted to ASCII
-     * @returns ASCII encoded string with non-ASCII character entity-ized
-     * @warning Adapted from MediaWiki, claiming fair use: this is a common
-     *       algorithm. If you disagree with this license fudgery,
-     *       implement it yourself.
-     * @note Uses decimal numeric entities since they are best supported.
-     * @note This is a DUMB function: it has no concept of keeping
-     *       character entities that the projected character encoding
-     *       can allow. We could possibly implement a smart version
-     *       but that would require it to also know which Unicode
-     *       codepoints the charset supported (not an easy task).
-     * @note Sort of with cleanUTF8() but it assumes that $str is
-     *       well-formed UTF-8
-     */
-    public static function convertToASCIIDumbLossless($str) {
-        $bytesleft = 0;
-        $result = '';
-        $working = 0;
-        $len = strlen($str);
-        for( $i = 0; $i < $len; $i++ ) {
-            $bytevalue = ord( $str[$i] );
-            if( $bytevalue <= 0x7F ) { //0xxx xxxx
-                $result .= chr( $bytevalue );
-                $bytesleft = 0;
-            } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
-                $working = $working << 6;
-                $working += ($bytevalue & 0x3F);
-                $bytesleft--;
-                if( $bytesleft <= 0 ) {
-                    $result .= "&#" . $working . ";";
-                }
-            } elseif( $bytevalue <= 0xDF ) { //110x xxxx
-                $working = $bytevalue & 0x1F;
-                $bytesleft = 1;
-            } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
-                $working = $bytevalue & 0x0F;
-                $bytesleft = 2;
-            } else { //1111 0xxx
-                $working = $bytevalue & 0x07;
-                $bytesleft = 3;
-            }
-        }
-        return $result;
-    }
-
-    /**
-     * This expensive function tests whether or not a given character
-     * encoding supports ASCII. 7/8-bit encodings like Shift_JIS will
-     * fail this test, and require special processing. Variable width
-     * encodings shouldn't ever fail.
-     *
-     * @param string $encoding Encoding name to test, as per iconv format
-     * @param bool $bypass Whether or not to bypass the precompiled arrays.
-     * @return Array of UTF-8 characters to their corresponding ASCII,
-     *      which can be used to "undo" any overzealous iconv action.
-     */
-    public static function testEncodingSupportsASCII($encoding, $bypass = false) {
-        static $encodings = array();
-        if (!$bypass) {
-            if (isset($encodings[$encoding])) return $encodings[$encoding];
-            $lenc = strtolower($encoding);
-            switch ($lenc) {
-                case 'shift_jis':
-                    return array("\xC2\xA5" => '\\', "\xE2\x80\xBE" => '~');
-                case 'johab':
-                    return array("\xE2\x82\xA9" => '\\');
-            }
-            if (strpos($lenc, 'iso-8859-') === 0) return array();
-        }
-        $ret = array();
-        set_error_handler(array('HTMLPurifier_Encoder', 'muteErrorHandler'));
-        if (iconv('UTF-8', $encoding, 'a') === false) return false;
-        for ($i = 0x20; $i <= 0x7E; $i++) { // all printable ASCII chars
-            $c = chr($i); // UTF-8 char
-            $r = iconv('UTF-8', "$encoding//IGNORE", $c); // initial conversion
-            if (
-                $r === '' ||
-                // This line is needed for iconv implementations that do not
-                // omit characters that do not exist in the target character set
-                ($r === $c && iconv($encoding, 'UTF-8//IGNORE', $r) !== $c)
-            ) {
-                // Reverse engineer: what's the UTF-8 equiv of this byte
-                // sequence? This assumes that there's no variable width
-                // encoding that doesn't support ASCII.
-                $ret[iconv($encoding, 'UTF-8//IGNORE', $c)] = $c;
-            }
-        }
-        restore_error_handler();
-        $encodings[$encoding] = $ret;
-        return $ret;
-    }
-
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/EntityLookup.php b/extlib/HTMLPurifier/HTMLPurifier/EntityLookup.php
deleted file mode 100644
index b4dfce94c3..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/EntityLookup.php
+++ /dev/null
@@ -1,44 +0,0 @@
-<?php
-
-/**
- * Object that provides entity lookup table from entity name to character
- */
-class HTMLPurifier_EntityLookup {
-
-    /**
-     * Assoc array of entity name to character represented.
-     */
-    public $table;
-
-    /**
-     * Sets up the entity lookup table from the serialized file contents.
-     * @note The serialized contents are versioned, but were generated
-     *       using the maintenance script generate_entity_file.php
-     * @warning This is not in constructor to help enforce the Singleton
-     */
-    public function setup($file = false) {
-        if (!$file) {
-            $file = HTMLPURIFIER_PREFIX . '/HTMLPurifier/EntityLookup/entities.ser';
-        }
-        $this->table = unserialize(file_get_contents($file));
-    }
-
-    /**
-     * Retrieves sole instance of the object.
-     * @param Optional prototype of custom lookup table to overload with.
-     */
-    public static function instance($prototype = false) {
-        // no references, since PHP doesn't copy unless modified
-        static $instance = null;
-        if ($prototype) {
-            $instance = $prototype;
-        } elseif (!$instance) {
-            $instance = new HTMLPurifier_EntityLookup();
-            $instance->setup();
-        }
-        return $instance;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/EntityLookup/entities.ser b/extlib/HTMLPurifier/HTMLPurifier/EntityLookup/entities.ser
deleted file mode 100644
index f2b8b8f2db..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/EntityLookup/entities.ser
+++ /dev/null
@@ -1 +0,0 @@
-a:246:{s:4:"nbsp";s:2:" ";s:5:"iexcl";s:2:"¡";s:4:"cent";s:2:"¢";s:5:"pound";s:2:"£";s:6:"curren";s:2:"¤";s:3:"yen";s:2:"¥";s:6:"brvbar";s:2:"¦";s:4:"sect";s:2:"§";s:3:"uml";s:2:"¨";s:4:"copy";s:2:"©";s:4:"ordf";s:2:"ª";s:5:"laquo";s:2:"«";s:3:"not";s:2:"¬";s:3:"shy";s:2:"­";s:3:"reg";s:2:"®";s:4:"macr";s:2:"¯";s:3:"deg";s:2:"°";s:6:"plusmn";s:2:"±";s:5:"acute";s:2:"´";s:5:"micro";s:2:"µ";s:4:"para";s:2:"¶";s:6:"middot";s:2:"·";s:5:"cedil";s:2:"¸";s:4:"ordm";s:2:"º";s:5:"raquo";s:2:"»";s:6:"iquest";s:2:"¿";s:6:"Agrave";s:2:"À";s:6:"Aacute";s:2:"Á";s:5:"Acirc";s:2:"Â";s:6:"Atilde";s:2:"Ã";s:4:"Auml";s:2:"Ä";s:5:"Aring";s:2:"Å";s:5:"AElig";s:2:"Æ";s:6:"Ccedil";s:2:"Ç";s:6:"Egrave";s:2:"È";s:6:"Eacute";s:2:"É";s:5:"Ecirc";s:2:"Ê";s:4:"Euml";s:2:"Ë";s:6:"Igrave";s:2:"Ì";s:6:"Iacute";s:2:"Í";s:5:"Icirc";s:2:"Î";s:4:"Iuml";s:2:"Ï";s:3:"ETH";s:2:"Ð";s:6:"Ntilde";s:2:"Ñ";s:6:"Ograve";s:2:"Ò";s:6:"Oacute";s:2:"Ó";s:5:"Ocirc";s:2:"Ô";s:6:"Otilde";s:2:"Õ";s:4:"Ouml";s:2:"Ö";s:5:"times";s:2:"×";s:6:"Oslash";s:2:"Ø";s:6:"Ugrave";s:2:"Ù";s:6:"Uacute";s:2:"Ú";s:5:"Ucirc";s:2:"Û";s:4:"Uuml";s:2:"Ü";s:6:"Yacute";s:2:"Ý";s:5:"THORN";s:2:"Þ";s:5:"szlig";s:2:"ß";s:6:"agrave";s:2:"à";s:6:"aacute";s:2:"á";s:5:"acirc";s:2:"â";s:6:"atilde";s:2:"ã";s:4:"auml";s:2:"ä";s:5:"aring";s:2:"å";s:5:"aelig";s:2:"æ";s:6:"ccedil";s:2:"ç";s:6:"egrave";s:2:"è";s:6:"eacute";s:2:"é";s:5:"ecirc";s:2:"ê";s:4:"euml";s:2:"ë";s:6:"igrave";s:2:"ì";s:6:"iacute";s:2:"í";s:5:"icirc";s:2:"î";s:4:"iuml";s:2:"ï";s:3:"eth";s:2:"ð";s:6:"ntilde";s:2:"ñ";s:6:"ograve";s:2:"ò";s:6:"oacute";s:2:"ó";s:5:"ocirc";s:2:"ô";s:6:"otilde";s:2:"õ";s:4:"ouml";s:2:"ö";s:6:"divide";s:2:"÷";s:6:"oslash";s:2:"ø";s:6:"ugrave";s:2:"ù";s:6:"uacute";s:2:"ú";s:5:"ucirc";s:2:"û";s:4:"uuml";s:2:"ü";s:6:"yacute";s:2:"ý";s:5:"thorn";s:2:"þ";s:4:"yuml";s:2:"ÿ";s:4:"quot";s:1:""";s:3:"amp";s:1:"&";s:2:"lt";s:1:"<";s:2:"gt";s:1:">";s:4:"apos";s:1:"'";s:5:"OElig";s:2:"Œ";s:5:"oelig";s:2:"œ";s:6:"Scaron";s:2:"Š";s:6:"scaron";s:2:"š";s:4:"Yuml";s:2:"Ÿ";s:4:"circ";s:2:"ˆ";s:5:"tilde";s:2:"˜";s:4:"ensp";s:3:" ";s:4:"emsp";s:3:" ";s:6:"thinsp";s:3:" ";s:4:"zwnj";s:3:"‌";s:3:"zwj";s:3:"‍";s:3:"lrm";s:3:"‎";s:3:"rlm";s:3:"‏";s:5:"ndash";s:3:"–";s:5:"mdash";s:3:"—";s:5:"lsquo";s:3:"‘";s:5:"rsquo";s:3:"’";s:5:"sbquo";s:3:"‚";s:5:"ldquo";s:3:"“";s:5:"rdquo";s:3:"”";s:5:"bdquo";s:3:"„";s:6:"dagger";s:3:"†";s:6:"Dagger";s:3:"‡";s:6:"permil";s:3:"‰";s:6:"lsaquo";s:3:"‹";s:6:"rsaquo";s:3:"›";s:4:"euro";s:3:"€";s:4:"fnof";s:2:"ƒ";s:5:"Alpha";s:2:"Α";s:4:"Beta";s:2:"Β";s:5:"Gamma";s:2:"Γ";s:5:"Delta";s:2:"Δ";s:7:"Epsilon";s:2:"Ε";s:4:"Zeta";s:2:"Ζ";s:3:"Eta";s:2:"Η";s:5:"Theta";s:2:"Θ";s:4:"Iota";s:2:"Ι";s:5:"Kappa";s:2:"Κ";s:6:"Lambda";s:2:"Λ";s:2:"Mu";s:2:"Μ";s:2:"Nu";s:2:"Ν";s:2:"Xi";s:2:"Ξ";s:7:"Omicron";s:2:"Ο";s:2:"Pi";s:2:"Π";s:3:"Rho";s:2:"Ρ";s:5:"Sigma";s:2:"Σ";s:3:"Tau";s:2:"Τ";s:7:"Upsilon";s:2:"Υ";s:3:"Phi";s:2:"Φ";s:3:"Chi";s:2:"Χ";s:3:"Psi";s:2:"Ψ";s:5:"Omega";s:2:"Ω";s:5:"alpha";s:2:"α";s:4:"beta";s:2:"β";s:5:"gamma";s:2:"γ";s:5:"delta";s:2:"δ";s:7:"epsilon";s:2:"ε";s:4:"zeta";s:2:"ζ";s:3:"eta";s:2:"η";s:5:"theta";s:2:"θ";s:4:"iota";s:2:"ι";s:5:"kappa";s:2:"κ";s:6:"lambda";s:2:"λ";s:2:"mu";s:2:"μ";s:2:"nu";s:2:"ν";s:2:"xi";s:2:"ξ";s:7:"omicron";s:2:"ο";s:2:"pi";s:2:"π";s:3:"rho";s:2:"ρ";s:6:"sigmaf";s:2:"ς";s:5:"sigma";s:2:"σ";s:3:"tau";s:2:"τ";s:7:"upsilon";s:2:"υ";s:3:"phi";s:2:"φ";s:3:"chi";s:2:"χ";s:3:"psi";s:2:"ψ";s:5:"omega";s:2:"ω";s:8:"thetasym";s:2:"ϑ";s:5:"upsih";s:2:"ϒ";s:3:"piv";s:2:"ϖ";s:4:"bull";s:3:"•";s:6:"hellip";s:3:"…";s:5:"prime";s:3:"′";s:5:"Prime";s:3:"″";s:5:"oline";s:3:"‾";s:5:"frasl";s:3:"⁄";s:6:"weierp";s:3:"℘";s:5:"image";s:3:"ℑ";s:4:"real";s:3:"ℜ";s:5:"trade";s:3:"™";s:7:"alefsym";s:3:"ℵ";s:4:"larr";s:3:"←";s:4:"uarr";s:3:"↑";s:4:"rarr";s:3:"→";s:4:"darr";s:3:"↓";s:4:"harr";s:3:"↔";s:5:"crarr";s:3:"↵";s:4:"lArr";s:3:"⇐";s:4:"uArr";s:3:"⇑";s:4:"rArr";s:3:"⇒";s:4:"dArr";s:3:"⇓";s:4:"hArr";s:3:"⇔";s:6:"forall";s:3:"∀";s:4:"part";s:3:"∂";s:5:"exist";s:3:"∃";s:5:"empty";s:3:"∅";s:5:"nabla";s:3:"∇";s:4:"isin";s:3:"∈";s:5:"notin";s:3:"∉";s:2:"ni";s:3:"∋";s:4:"prod";s:3:"∏";s:3:"sum";s:3:"∑";s:5:"minus";s:3:"−";s:6:"lowast";s:3:"∗";s:5:"radic";s:3:"√";s:4:"prop";s:3:"∝";s:5:"infin";s:3:"∞";s:3:"ang";s:3:"∠";s:3:"and";s:3:"∧";s:2:"or";s:3:"∨";s:3:"cap";s:3:"∩";s:3:"cup";s:3:"∪";s:3:"int";s:3:"∫";s:3:"sim";s:3:"∼";s:4:"cong";s:3:"≅";s:5:"asymp";s:3:"≈";s:2:"ne";s:3:"≠";s:5:"equiv";s:3:"≡";s:2:"le";s:3:"≤";s:2:"ge";s:3:"≥";s:3:"sub";s:3:"⊂";s:3:"sup";s:3:"⊃";s:4:"nsub";s:3:"⊄";s:4:"sube";s:3:"⊆";s:4:"supe";s:3:"⊇";s:5:"oplus";s:3:"⊕";s:6:"otimes";s:3:"⊗";s:4:"perp";s:3:"⊥";s:4:"sdot";s:3:"⋅";s:5:"lceil";s:3:"⌈";s:5:"rceil";s:3:"⌉";s:6:"lfloor";s:3:"⌊";s:6:"rfloor";s:3:"⌋";s:4:"lang";s:3:"〈";s:4:"rang";s:3:"〉";s:3:"loz";s:3:"◊";s:6:"spades";s:3:"♠";s:5:"clubs";s:3:"♣";s:6:"hearts";s:3:"♥";s:5:"diams";s:3:"♦";}
\ No newline at end of file
diff --git a/extlib/HTMLPurifier/HTMLPurifier/EntityParser.php b/extlib/HTMLPurifier/HTMLPurifier/EntityParser.php
deleted file mode 100644
index 8c384472dc..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/EntityParser.php
+++ /dev/null
@@ -1,144 +0,0 @@
-<?php
-
-// if want to implement error collecting here, we'll need to use some sort
-// of global data (probably trigger_error) because it's impossible to pass
-// $config or $context to the callback functions.
-
-/**
- * Handles referencing and derefencing character entities
- */
-class HTMLPurifier_EntityParser
-{
-
-    /**
-     * Reference to entity lookup table.
-     */
-    protected $_entity_lookup;
-
-    /**
-     * Callback regex string for parsing entities.
-     */
-    protected $_substituteEntitiesRegex =
-'/&(?:[#]x([a-fA-F0-9]+)|[#]0*(\d+)|([A-Za-z_:][A-Za-z0-9.\-_:]*));?/';
-//     1. hex             2. dec      3. string (XML style)
-
-
-    /**
-     * Decimal to parsed string conversion table for special entities.
-     */
-    protected $_special_dec2str =
-            array(
-                    34 => '"',
-                    38 => '&',
-                    39 => "'",
-                    60 => '<',
-                    62 => '>'
-            );
-
-    /**
-     * Stripped entity names to decimal conversion table for special entities.
-     */
-    protected $_special_ent2dec =
-            array(
-                    'quot' => 34,
-                    'amp'  => 38,
-                    'lt'   => 60,
-                    'gt'   => 62
-            );
-
-    /**
-     * Substitutes non-special entities with their parsed equivalents. Since
-     * running this whenever you have parsed character is t3h 5uck, we run
-     * it before everything else.
-     *
-     * @param $string String to have non-special entities parsed.
-     * @returns Parsed string.
-     */
-    public function substituteNonSpecialEntities($string) {
-        // it will try to detect missing semicolons, but don't rely on it
-        return preg_replace_callback(
-            $this->_substituteEntitiesRegex,
-            array($this, 'nonSpecialEntityCallback'),
-            $string
-            );
-    }
-
-    /**
-     * Callback function for substituteNonSpecialEntities() that does the work.
-     *
-     * @param $matches  PCRE matches array, with 0 the entire match, and
-     *                  either index 1, 2 or 3 set with a hex value, dec value,
-     *                  or string (respectively).
-     * @returns Replacement string.
-     */
-
-    protected function nonSpecialEntityCallback($matches) {
-        // replaces all but big five
-        $entity = $matches[0];
-        $is_num = (@$matches[0][1] === '#');
-        if ($is_num) {
-            $is_hex = (@$entity[2] === 'x');
-            $code = $is_hex ? hexdec($matches[1]) : (int) $matches[2];
-
-            // abort for special characters
-            if (isset($this->_special_dec2str[$code]))  return $entity;
-
-            return HTMLPurifier_Encoder::unichr($code);
-        } else {
-            if (isset($this->_special_ent2dec[$matches[3]])) return $entity;
-            if (!$this->_entity_lookup) {
-                $this->_entity_lookup = HTMLPurifier_EntityLookup::instance();
-            }
-            if (isset($this->_entity_lookup->table[$matches[3]])) {
-                return $this->_entity_lookup->table[$matches[3]];
-            } else {
-                return $entity;
-            }
-        }
-    }
-
-    /**
-     * Substitutes only special entities with their parsed equivalents.
-     *
-     * @notice We try to avoid calling this function because otherwise, it
-     * would have to be called a lot (for every parsed section).
-     *
-     * @param $string String to have non-special entities parsed.
-     * @returns Parsed string.
-     */
-    public function substituteSpecialEntities($string) {
-        return preg_replace_callback(
-            $this->_substituteEntitiesRegex,
-            array($this, 'specialEntityCallback'),
-            $string);
-    }
-
-    /**
-     * Callback function for substituteSpecialEntities() that does the work.
-     *
-     * This callback has same syntax as nonSpecialEntityCallback().
-     *
-     * @param $matches  PCRE-style matches array, with 0 the entire match, and
-     *                  either index 1, 2 or 3 set with a hex value, dec value,
-     *                  or string (respectively).
-     * @returns Replacement string.
-     */
-    protected function specialEntityCallback($matches) {
-        $entity = $matches[0];
-        $is_num = (@$matches[0][1] === '#');
-        if ($is_num) {
-            $is_hex = (@$entity[2] === 'x');
-            $int = $is_hex ? hexdec($matches[1]) : (int) $matches[2];
-            return isset($this->_special_dec2str[$int]) ?
-                $this->_special_dec2str[$int] :
-                $entity;
-        } else {
-            return isset($this->_special_ent2dec[$matches[3]]) ?
-                $this->_special_ent2dec[$matches[3]] :
-                $entity;
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ErrorCollector.php b/extlib/HTMLPurifier/HTMLPurifier/ErrorCollector.php
deleted file mode 100644
index 6713eaf773..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ErrorCollector.php
+++ /dev/null
@@ -1,209 +0,0 @@
-<?php
-
-/**
- * Error collection class that enables HTML Purifier to report HTML
- * problems back to the user
- */
-class HTMLPurifier_ErrorCollector
-{
-
-    /**
-     * Identifiers for the returned error array. These are purposely numeric
-     * so list() can be used.
-     */
-    const LINENO   = 0;
-    const SEVERITY = 1;
-    const MESSAGE  = 2;
-    const CHILDREN = 3;
-
-    protected $errors;
-    protected $_current;
-    protected $_stacks = array(array());
-    protected $locale;
-    protected $generator;
-    protected $context;
-
-    protected $lines = array();
-
-    public function __construct($context) {
-        $this->locale    =& $context->get('Locale');
-        $this->context   = $context;
-        $this->_current  =& $this->_stacks[0];
-        $this->errors    =& $this->_stacks[0];
-    }
-
-    /**
-     * Sends an error message to the collector for later use
-     * @param $severity int Error severity, PHP error style (don't use E_USER_)
-     * @param $msg string Error message text
-     * @param $subst1 string First substitution for $msg
-     * @param $subst2 string ...
-     */
-    public function send($severity, $msg) {
-
-        $args = array();
-        if (func_num_args() > 2) {
-            $args = func_get_args();
-            array_shift($args);
-            unset($args[0]);
-        }
-
-        $token = $this->context->get('CurrentToken', true);
-        $line  = $token ? $token->line : $this->context->get('CurrentLine', true);
-        $col   = $token ? $token->col  : $this->context->get('CurrentCol',  true);
-        $attr  = $this->context->get('CurrentAttr', true);
-
-        // perform special substitutions, also add custom parameters
-        $subst = array();
-        if (!is_null($token)) {
-            $args['CurrentToken'] = $token;
-        }
-        if (!is_null($attr)) {
-            $subst['$CurrentAttr.Name'] = $attr;
-            if (isset($token->attr[$attr])) $subst['$CurrentAttr.Value'] = $token->attr[$attr];
-        }
-
-        if (empty($args)) {
-            $msg = $this->locale->getMessage($msg);
-        } else {
-            $msg = $this->locale->formatMessage($msg, $args);
-        }
-
-        if (!empty($subst)) $msg = strtr($msg, $subst);
-
-        // (numerically indexed)
-        $error = array(
-            self::LINENO   => $line,
-            self::SEVERITY => $severity,
-            self::MESSAGE  => $msg,
-            self::CHILDREN => array()
-        );
-        $this->_current[] = $error;
-
-
-        // NEW CODE BELOW ...
-
-        $struct = null;
-        // Top-level errors are either:
-        //  TOKEN type, if $value is set appropriately, or
-        //  "syntax" type, if $value is null
-        $new_struct = new HTMLPurifier_ErrorStruct();
-        $new_struct->type = HTMLPurifier_ErrorStruct::TOKEN;
-        if ($token) $new_struct->value = clone $token;
-        if (is_int($line) && is_int($col)) {
-            if (isset($this->lines[$line][$col])) {
-                $struct = $this->lines[$line][$col];
-            } else {
-                $struct = $this->lines[$line][$col] = $new_struct;
-            }
-            // These ksorts may present a performance problem
-            ksort($this->lines[$line], SORT_NUMERIC);
-        } else {
-            if (isset($this->lines[-1])) {
-                $struct = $this->lines[-1];
-            } else {
-                $struct = $this->lines[-1] = $new_struct;
-            }
-        }
-        ksort($this->lines, SORT_NUMERIC);
-
-        // Now, check if we need to operate on a lower structure
-        if (!empty($attr)) {
-            $struct = $struct->getChild(HTMLPurifier_ErrorStruct::ATTR, $attr);
-            if (!$struct->value) {
-                $struct->value = array($attr, 'PUT VALUE HERE');
-            }
-        }
-        if (!empty($cssprop)) {
-            $struct = $struct->getChild(HTMLPurifier_ErrorStruct::CSSPROP, $cssprop);
-            if (!$struct->value) {
-                // if we tokenize CSS this might be a little more difficult to do
-                $struct->value = array($cssprop, 'PUT VALUE HERE');
-            }
-        }
-
-        // Ok, structs are all setup, now time to register the error
-        $struct->addError($severity, $msg);
-    }
-
-    /**
-     * Retrieves raw error data for custom formatter to use
-     * @param List of arrays in format of array(line of error,
-     *        error severity, error message,
-     *        recursive sub-errors array)
-     */
-    public function getRaw() {
-        return $this->errors;
-    }
-
-    /**
-     * Default HTML formatting implementation for error messages
-     * @param $config Configuration array, vital for HTML output nature
-     * @param $errors Errors array to display; used for recursion.
-     */
-    public function getHTMLFormatted($config, $errors = null) {
-        $ret = array();
-
-        $this->generator = new HTMLPurifier_Generator($config, $this->context);
-        if ($errors === null) $errors = $this->errors;
-
-        // 'At line' message needs to be removed
-
-        // generation code for new structure goes here. It needs to be recursive.
-        foreach ($this->lines as $line => $col_array) {
-            if ($line == -1) continue;
-            foreach ($col_array as $col => $struct) {
-                $this->_renderStruct($ret, $struct, $line, $col);
-            }
-        }
-        if (isset($this->lines[-1])) {
-            $this->_renderStruct($ret, $this->lines[-1]);
-        }
-
-        if (empty($errors)) {
-            return '<p>' . $this->locale->getMessage('ErrorCollector: No errors') . '</p>';
-        } else {
-            return '<ul><li>' . implode('</li><li>', $ret) . '</li></ul>';
-        }
-
-    }
-
-    private function _renderStruct(&$ret, $struct, $line = null, $col = null) {
-        $stack = array($struct);
-        $context_stack = array(array());
-        while ($current = array_pop($stack)) {
-            $context = array_pop($context_stack);
-            foreach ($current->errors as $error) {
-                list($severity, $msg) = $error;
-                $string = '';
-                $string .= '<div>';
-                // W3C uses an icon to indicate the severity of the error.
-                $error = $this->locale->getErrorName($severity);
-                $string .= "<span class=\"error e$severity\"><strong>$error</strong></span> ";
-                if (!is_null($line) && !is_null($col)) {
-                    $string .= "<em class=\"location\">Line $line, Column $col: </em> ";
-                } else {
-                    $string .= '<em class="location">End of Document: </em> ';
-                }
-                $string .= '<strong class="description">' . $this->generator->escape($msg) . '</strong> ';
-                $string .= '</div>';
-                // Here, have a marker for the character on the column appropriate.
-                // Be sure to clip extremely long lines.
-                //$string .= '<pre>';
-                //$string .= '';
-                //$string .= '</pre>';
-                $ret[] = $string;
-            }
-            foreach ($current->children as $type => $array) {
-                $context[] = $current;
-                $stack = array_merge($stack, array_reverse($array, true));
-                for ($i = count($array); $i > 0; $i--) {
-                    $context_stack[] = $context;
-                }
-            }
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/ErrorStruct.php b/extlib/HTMLPurifier/HTMLPurifier/ErrorStruct.php
deleted file mode 100644
index 9bc8996ec1..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/ErrorStruct.php
+++ /dev/null
@@ -1,60 +0,0 @@
-<?php
-
-/**
- * Records errors for particular segments of an HTML document such as tokens,
- * attributes or CSS properties. They can contain error structs (which apply
- * to components of what they represent), but their main purpose is to hold
- * errors applying to whatever struct is being used.
- */
-class HTMLPurifier_ErrorStruct
-{
-
-    /**
-     * Possible values for $children first-key. Note that top-level structures
-     * are automatically token-level.
-     */
-    const TOKEN     = 0;
-    const ATTR      = 1;
-    const CSSPROP   = 2;
-
-    /**
-     * Type of this struct.
-     */
-    public $type;
-
-    /**
-     * Value of the struct we are recording errors for. There are various
-     * values for this:
-     *  - TOKEN: Instance of HTMLPurifier_Token
-     *  - ATTR: array('attr-name', 'value')
-     *  - CSSPROP: array('prop-name', 'value')
-     */
-    public $value;
-
-    /**
-     * Errors registered for this structure.
-     */
-    public $errors = array();
-
-    /**
-     * Child ErrorStructs that are from this structure. For example, a TOKEN
-     * ErrorStruct would contain ATTR ErrorStructs. This is a multi-dimensional
-     * array in structure: [TYPE]['identifier']
-     */
-    public $children = array();
-
-    public function getChild($type, $id) {
-        if (!isset($this->children[$type][$id])) {
-            $this->children[$type][$id] = new HTMLPurifier_ErrorStruct();
-            $this->children[$type][$id]->type = $type;
-        }
-        return $this->children[$type][$id];
-    }
-
-    public function addError($severity, $message) {
-        $this->errors[] = array($severity, $message);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Exception.php b/extlib/HTMLPurifier/HTMLPurifier/Exception.php
deleted file mode 100644
index be85b4c560..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Exception.php
+++ /dev/null
@@ -1,12 +0,0 @@
-<?php
-
-/**
- * Global exception class for HTML Purifier; any exceptions we throw
- * are from here.
- */
-class HTMLPurifier_Exception extends Exception
-{
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Filter.php b/extlib/HTMLPurifier/HTMLPurifier/Filter.php
deleted file mode 100644
index 9a0e7b09f3..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Filter.php
+++ /dev/null
@@ -1,46 +0,0 @@
-<?php
-
-/**
- * Represents a pre or post processing filter on HTML Purifier's output
- *
- * Sometimes, a little ad-hoc fixing of HTML has to be done before
- * it gets sent through HTML Purifier: you can use filters to acheive
- * this effect. For instance, YouTube videos can be preserved using
- * this manner. You could have used a decorator for this task, but
- * PHP's support for them is not terribly robust, so we're going
- * to just loop through the filters.
- *
- * Filters should be exited first in, last out. If there are three filters,
- * named 1, 2 and 3, the order of execution should go 1->preFilter,
- * 2->preFilter, 3->preFilter, purify, 3->postFilter, 2->postFilter,
- * 1->postFilter.
- *
- * @note Methods are not declared abstract as it is perfectly legitimate
- *       for an implementation not to want anything to happen on a step
- */
-
-class HTMLPurifier_Filter
-{
-
-    /**
-     * Name of the filter for identification purposes
-     */
-    public $name;
-
-    /**
-     * Pre-processor function, handles HTML before HTML Purifier
-     */
-    public function preFilter($html, $config, $context) {
-        return $html;
-    }
-
-    /**
-     * Post-processor function, handles HTML after HTML Purifier
-     */
-    public function postFilter($html, $config, $context) {
-        return $html;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Filter/ExtractStyleBlocks.php b/extlib/HTMLPurifier/HTMLPurifier/Filter/ExtractStyleBlocks.php
deleted file mode 100644
index bbf78a6630..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Filter/ExtractStyleBlocks.php
+++ /dev/null
@@ -1,135 +0,0 @@
-<?php
-
-/**
- * This filter extracts <style> blocks from input HTML, cleans them up
- * using CSSTidy, and then places them in $purifier->context->get('StyleBlocks')
- * so they can be used elsewhere in the document.
- *
- * @note
- *      See tests/HTMLPurifier/Filter/ExtractStyleBlocksTest.php for
- *      sample usage.
- *
- * @note
- *      This filter can also be used on stylesheets not included in the
- *      document--something purists would probably prefer. Just directly
- *      call HTMLPurifier_Filter_ExtractStyleBlocks->cleanCSS()
- */
-class HTMLPurifier_Filter_ExtractStyleBlocks extends HTMLPurifier_Filter
-{
-
-    public $name = 'ExtractStyleBlocks';
-    private $_styleMatches = array();
-    private $_tidy;
-
-    public function __construct() {
-        $this->_tidy = new csstidy();
-    }
-
-    /**
-     * Save the contents of CSS blocks to style matches
-     * @param $matches preg_replace style $matches array
-     */
-    protected function styleCallback($matches) {
-        $this->_styleMatches[] = $matches[1];
-    }
-
-    /**
-     * Removes inline <style> tags from HTML, saves them for later use
-     * @todo Extend to indicate non-text/css style blocks
-     */
-    public function preFilter($html, $config, $context) {
-        $tidy = $config->get('Filter.ExtractStyleBlocks.TidyImpl');
-        if ($tidy !== null) $this->_tidy = $tidy;
-        $html = preg_replace_callback('#<style(?:\s.*)?>(.+)</style>#isU', array($this, 'styleCallback'), $html);
-        $style_blocks = $this->_styleMatches;
-        $this->_styleMatches = array(); // reset
-        $context->register('StyleBlocks', $style_blocks); // $context must not be reused
-        if ($this->_tidy) {
-            foreach ($style_blocks as &$style) {
-                $style = $this->cleanCSS($style, $config, $context);
-            }
-        }
-        return $html;
-    }
-
-    /**
-     * Takes CSS (the stuff found in <style>) and cleans it.
-     * @warning Requires CSSTidy <http://csstidy.sourceforge.net/>
-     * @param $css     CSS styling to clean
-     * @param $config  Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return Cleaned CSS
-     */
-    public function cleanCSS($css, $config, $context) {
-        // prepare scope
-        $scope = $config->get('Filter.ExtractStyleBlocks.Scope');
-        if ($scope !== null) {
-            $scopes = array_map('trim', explode(',', $scope));
-        } else {
-            $scopes = array();
-        }
-        // remove comments from CSS
-        $css = trim($css);
-        if (strncmp('<!--', $css, 4) === 0) {
-            $css = substr($css, 4);
-        }
-        if (strlen($css) > 3 && substr($css, -3) == '-->') {
-            $css = substr($css, 0, -3);
-        }
-        $css = trim($css);
-        $this->_tidy->parse($css);
-        $css_definition = $config->getDefinition('CSS');
-        foreach ($this->_tidy->css as $k => $decls) {
-            // $decls are all CSS declarations inside an @ selector
-            $new_decls = array();
-            foreach ($decls as $selector => $style) {
-                $selector = trim($selector);
-                if ($selector === '') continue; // should not happen
-                if ($selector[0] === '+') {
-                    if ($selector !== '' && $selector[0] === '+') continue;
-                }
-                if (!empty($scopes)) {
-                    $new_selector = array(); // because multiple ones are possible
-                    $selectors = array_map('trim', explode(',', $selector));
-                    foreach ($scopes as $s1) {
-                        foreach ($selectors as $s2) {
-                            $new_selector[] = "$s1 $s2";
-                        }
-                    }
-                    $selector = implode(', ', $new_selector); // now it's a string
-                }
-                foreach ($style as $name => $value) {
-                    if (!isset($css_definition->info[$name])) {
-                        unset($style[$name]);
-                        continue;
-                    }
-                    $def = $css_definition->info[$name];
-                    $ret = $def->validate($value, $config, $context);
-                    if ($ret === false) unset($style[$name]);
-                    else $style[$name] = $ret;
-                }
-                $new_decls[$selector] = $style;
-            }
-            $this->_tidy->css[$k] = $new_decls;
-        }
-        // remove stuff that shouldn't be used, could be reenabled
-        // after security risks are analyzed
-        $this->_tidy->import = array();
-        $this->_tidy->charset = null;
-        $this->_tidy->namespace = null;
-        $css = $this->_tidy->print->plain();
-        // we are going to escape any special characters <>& to ensure
-        // that no funny business occurs (i.e. </style> in a font-family prop).
-        if ($config->get('Filter.ExtractStyleBlocks.Escaping')) {
-            $css = str_replace(
-                array('<',    '>',    '&'),
-                array('\3C ', '\3E ', '\26 '),
-                $css
-            );
-        }
-        return $css;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Filter/YouTube.php b/extlib/HTMLPurifier/HTMLPurifier/Filter/YouTube.php
deleted file mode 100644
index aca972f6c5..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Filter/YouTube.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-class HTMLPurifier_Filter_YouTube extends HTMLPurifier_Filter
-{
-
-    public $name = 'YouTube';
-
-    public function preFilter($html, $config, $context) {
-        $pre_regex = '#<object[^>]+>.+?'.
-            'http://www.youtube.com/v/([A-Za-z0-9\-_]+).+?</object>#s';
-        $pre_replace = '<span class="youtube-embed">\1</span>';
-        return preg_replace($pre_regex, $pre_replace, $html);
-    }
-
-    public function postFilter($html, $config, $context) {
-        $post_regex = '#<span class="youtube-embed">([A-Za-z0-9\-_]+)</span>#';
-        return preg_replace_callback($post_regex, array($this, 'postFilterCallback'), $html);
-    }
-
-    protected function armorUrl($url) {
-        return str_replace('--', '-&#45;', $url);
-    }
-
-    protected function postFilterCallback($matches) {
-        $url = $this->armorUrl($matches[1]);
-        return '<object width="425" height="350" type="application/x-shockwave-flash" '.
-            'data="http://www.youtube.com/v/'.$url.'">'.
-            '<param name="movie" value="http://www.youtube.com/v/'.$url.'"></param>'.
-            '<!--[if IE]>'.
-            '<embed src="http://www.youtube.com/v/'.$url.'"'.
-            'type="application/x-shockwave-flash"'.
-            'wmode="transparent" width="425" height="350" />'.
-            '<![endif]-->'.
-            '</object>';
-
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Generator.php b/extlib/HTMLPurifier/HTMLPurifier/Generator.php
deleted file mode 100644
index 24bd8a54ed..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Generator.php
+++ /dev/null
@@ -1,183 +0,0 @@
-<?php
-
-/**
- * Generates HTML from tokens.
- * @todo Refactor interface so that configuration/context is determined
- *       upon instantiation, no need for messy generateFromTokens() calls
- * @todo Make some of the more internal functions protected, and have
- *       unit tests work around that
- */
-class HTMLPurifier_Generator
-{
-
-    /**
-     * Whether or not generator should produce XML output
-     */
-    private $_xhtml = true;
-
-    /**
-     * :HACK: Whether or not generator should comment the insides of <script> tags
-     */
-    private $_scriptFix = false;
-
-    /**
-     * Cache of HTMLDefinition during HTML output to determine whether or
-     * not attributes should be minimized.
-     */
-    private $_def;
-
-    /**
-     * Cache of %Output.SortAttr
-     */
-    private $_sortAttr;
-
-    /**
-     * Configuration for the generator
-     */
-    protected $config;
-
-    /**
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     */
-    public function __construct($config, $context) {
-        $this->config = $config;
-        $this->_scriptFix = $config->get('Output.CommentScriptContents');
-        $this->_sortAttr = $config->get('Output.SortAttr');
-        $this->_def = $config->getHTMLDefinition();
-        $this->_xhtml = $this->_def->doctype->xml;
-    }
-
-    /**
-     * Generates HTML from an array of tokens.
-     * @param $tokens Array of HTMLPurifier_Token
-     * @param $config HTMLPurifier_Config object
-     * @return Generated HTML
-     */
-    public function generateFromTokens($tokens) {
-        if (!$tokens) return '';
-
-        // Basic algorithm
-        $html = '';
-        for ($i = 0, $size = count($tokens); $i < $size; $i++) {
-            if ($this->_scriptFix && $tokens[$i]->name === 'script'
-                && $i + 2 < $size && $tokens[$i+2] instanceof HTMLPurifier_Token_End) {
-                // script special case
-                // the contents of the script block must be ONE token
-                // for this to work.
-                $html .= $this->generateFromToken($tokens[$i++]);
-                $html .= $this->generateScriptFromToken($tokens[$i++]);
-            }
-            $html .= $this->generateFromToken($tokens[$i]);
-        }
-
-        // Tidy cleanup
-        if (extension_loaded('tidy') && $this->config->get('Output.TidyFormat')) {
-            $tidy = new Tidy;
-            $tidy->parseString($html, array(
-               'indent'=> true,
-               'output-xhtml' => $this->_xhtml,
-               'show-body-only' => true,
-               'indent-spaces' => 2,
-               'wrap' => 68,
-            ), 'utf8');
-            $tidy->cleanRepair();
-            $html = (string) $tidy; // explicit cast necessary
-        }
-
-        // Normalize newlines to system defined value
-        $nl = $this->config->get('Output.Newline');
-        if ($nl === null) $nl = PHP_EOL;
-        if ($nl !== "\n") $html = str_replace("\n", $nl, $html);
-        return $html;
-    }
-
-    /**
-     * Generates HTML from a single token.
-     * @param $token HTMLPurifier_Token object.
-     * @return Generated HTML
-     */
-    public function generateFromToken($token) {
-        if (!$token instanceof HTMLPurifier_Token) {
-            trigger_error('Cannot generate HTML from non-HTMLPurifier_Token object', E_USER_WARNING);
-            return '';
-
-        } elseif ($token instanceof HTMLPurifier_Token_Start) {
-            $attr = $this->generateAttributes($token->attr, $token->name);
-            return '<' . $token->name . ($attr ? ' ' : '') . $attr . '>';
-
-        } elseif ($token instanceof HTMLPurifier_Token_End) {
-            return '</' . $token->name . '>';
-
-        } elseif ($token instanceof HTMLPurifier_Token_Empty) {
-            $attr = $this->generateAttributes($token->attr, $token->name);
-             return '<' . $token->name . ($attr ? ' ' : '') . $attr .
-                ( $this->_xhtml ? ' /': '' ) // <br /> v. <br>
-                . '>';
-
-        } elseif ($token instanceof HTMLPurifier_Token_Text) {
-            return $this->escape($token->data, ENT_NOQUOTES);
-
-        } elseif ($token instanceof HTMLPurifier_Token_Comment) {
-            return '<!--' . $token->data . '-->';
-        } else {
-            return '';
-
-        }
-    }
-
-    /**
-     * Special case processor for the contents of script tags
-     * @warning This runs into problems if there's already a literal
-     *          --> somewhere inside the script contents.
-     */
-    public function generateScriptFromToken($token) {
-        if (!$token instanceof HTMLPurifier_Token_Text) return $this->generateFromToken($token);
-        // Thanks <http://lachy.id.au/log/2005/05/script-comments>
-        $data = preg_replace('#//\s*$#', '', $token->data);
-        return '<!--//--><![CDATA[//><!--' . "\n" . trim($data) . "\n" . '//--><!]]>';
-    }
-
-    /**
-     * Generates attribute declarations from attribute array.
-     * @note This does not include the leading or trailing space.
-     * @param $assoc_array_of_attributes Attribute array
-     * @param $element Name of element attributes are for, used to check
-     *        attribute minimization.
-     * @return Generate HTML fragment for insertion.
-     */
-    public function generateAttributes($assoc_array_of_attributes, $element = false) {
-        $html = '';
-        if ($this->_sortAttr) ksort($assoc_array_of_attributes);
-        foreach ($assoc_array_of_attributes as $key => $value) {
-            if (!$this->_xhtml) {
-                // Remove namespaced attributes
-                if (strpos($key, ':') !== false) continue;
-                // Check if we should minimize the attribute: val="val" -> val
-                if ($element && !empty($this->_def->info[$element]->attr[$key]->minimized)) {
-                    $html .= $key . ' ';
-                    continue;
-                }
-            }
-            $html .= $key.'="'.$this->escape($value).'" ';
-        }
-        return rtrim($html);
-    }
-
-    /**
-     * Escapes raw text data.
-     * @todo This really ought to be protected, but until we have a facility
-     *       for properly generating HTML here w/o using tokens, it stays
-     *       public.
-     * @param $string String data to escape for HTML.
-     * @param $quote Quoting style, like htmlspecialchars. ENT_NOQUOTES is
-     *               permissible for non-attribute output.
-     * @return String escaped data.
-     */
-    public function escape($string, $quote = ENT_COMPAT) {
-        return htmlspecialchars($string, $quote, 'UTF-8');
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLDefinition.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLDefinition.php
deleted file mode 100644
index c99ac11eb2..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLDefinition.php
+++ /dev/null
@@ -1,420 +0,0 @@
-<?php
-
-/**
- * Definition of the purified HTML that describes allowed children,
- * attributes, and many other things.
- *
- * Conventions:
- *
- * All member variables that are prefixed with info
- * (including the main $info array) are used by HTML Purifier internals
- * and should not be directly edited when customizing the HTMLDefinition.
- * They can usually be set via configuration directives or custom
- * modules.
- *
- * On the other hand, member variables without the info prefix are used
- * internally by the HTMLDefinition and MUST NOT be used by other HTML
- * Purifier internals. Many of them, however, are public, and may be
- * edited by userspace code to tweak the behavior of HTMLDefinition.
- *
- * @note This class is inspected by Printer_HTMLDefinition; please
- *       update that class if things here change.
- *
- * @warning Directives that change this object's structure must be in
- *          the HTML or Attr namespace!
- */
-class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
-{
-
-    // FULLY-PUBLIC VARIABLES ---------------------------------------------
-
-    /**
-     * Associative array of element names to HTMLPurifier_ElementDef
-     */
-    public $info = array();
-
-    /**
-     * Associative array of global attribute name to attribute definition.
-     */
-    public $info_global_attr = array();
-
-    /**
-     * String name of parent element HTML will be going into.
-     */
-    public $info_parent = 'div';
-
-    /**
-     * Definition for parent element, allows parent element to be a
-     * tag that's not allowed inside the HTML fragment.
-     */
-    public $info_parent_def;
-
-    /**
-     * String name of element used to wrap inline elements in block context
-     * @note This is rarely used except for BLOCKQUOTEs in strict mode
-     */
-    public $info_block_wrapper = 'p';
-
-    /**
-     * Associative array of deprecated tag name to HTMLPurifier_TagTransform
-     */
-    public $info_tag_transform = array();
-
-    /**
-     * Indexed list of HTMLPurifier_AttrTransform to be performed before validation.
-     */
-    public $info_attr_transform_pre = array();
-
-    /**
-     * Indexed list of HTMLPurifier_AttrTransform to be performed after validation.
-     */
-    public $info_attr_transform_post = array();
-
-    /**
-     * Nested lookup array of content set name (Block, Inline) to
-     * element name to whether or not it belongs in that content set.
-     */
-    public $info_content_sets = array();
-
-    /**
-     * Indexed list of HTMLPurifier_Injector to be used.
-     */
-    public $info_injector = array();
-
-    /**
-     * Doctype object
-     */
-    public $doctype;
-
-
-
-    // RAW CUSTOMIZATION STUFF --------------------------------------------
-
-    /**
-     * Adds a custom attribute to a pre-existing element
-     * @note This is strictly convenience, and does not have a corresponding
-     *       method in HTMLPurifier_HTMLModule
-     * @param $element_name String element name to add attribute to
-     * @param $attr_name String name of attribute
-     * @param $def Attribute definition, can be string or object, see
-     *             HTMLPurifier_AttrTypes for details
-     */
-    public function addAttribute($element_name, $attr_name, $def) {
-        $module = $this->getAnonymousModule();
-        if (!isset($module->info[$element_name])) {
-            $element = $module->addBlankElement($element_name);
-        } else {
-            $element = $module->info[$element_name];
-        }
-        $element->attr[$attr_name] = $def;
-    }
-
-    /**
-     * Adds a custom element to your HTML definition
-     * @note See HTMLPurifier_HTMLModule::addElement for detailed
-     *       parameter and return value descriptions.
-     */
-    public function addElement($element_name, $type, $contents, $attr_collections, $attributes = array()) {
-        $module = $this->getAnonymousModule();
-        // assume that if the user is calling this, the element
-        // is safe. This may not be a good idea
-        $element = $module->addElement($element_name, $type, $contents, $attr_collections, $attributes);
-        return $element;
-    }
-
-    /**
-     * Adds a blank element to your HTML definition, for overriding
-     * existing behavior
-     * @note See HTMLPurifier_HTMLModule::addBlankElement for detailed
-     *       parameter and return value descriptions.
-     */
-    public function addBlankElement($element_name) {
-        $module  = $this->getAnonymousModule();
-        $element = $module->addBlankElement($element_name);
-        return $element;
-    }
-
-    /**
-     * Retrieves a reference to the anonymous module, so you can
-     * bust out advanced features without having to make your own
-     * module.
-     */
-    public function getAnonymousModule() {
-        if (!$this->_anonModule) {
-            $this->_anonModule = new HTMLPurifier_HTMLModule();
-            $this->_anonModule->name = 'Anonymous';
-        }
-        return $this->_anonModule;
-    }
-
-    private $_anonModule;
-
-
-    // PUBLIC BUT INTERNAL VARIABLES --------------------------------------
-
-    public $type = 'HTML';
-    public $manager; /**< Instance of HTMLPurifier_HTMLModuleManager */
-
-    /**
-     * Performs low-cost, preliminary initialization.
-     */
-    public function __construct() {
-        $this->manager = new HTMLPurifier_HTMLModuleManager();
-    }
-
-    protected function doSetup($config) {
-        $this->processModules($config);
-        $this->setupConfigStuff($config);
-        unset($this->manager);
-
-        // cleanup some of the element definitions
-        foreach ($this->info as $k => $v) {
-            unset($this->info[$k]->content_model);
-            unset($this->info[$k]->content_model_type);
-        }
-    }
-
-    /**
-     * Extract out the information from the manager
-     */
-    protected function processModules($config) {
-
-        if ($this->_anonModule) {
-            // for user specific changes
-            // this is late-loaded so we don't have to deal with PHP4
-            // reference wonky-ness
-            $this->manager->addModule($this->_anonModule);
-            unset($this->_anonModule);
-        }
-
-        $this->manager->setup($config);
-        $this->doctype = $this->manager->doctype;
-
-        foreach ($this->manager->modules as $module) {
-            foreach($module->info_tag_transform as $k => $v) {
-                if ($v === false) unset($this->info_tag_transform[$k]);
-                else $this->info_tag_transform[$k] = $v;
-            }
-            foreach($module->info_attr_transform_pre as $k => $v) {
-                if ($v === false) unset($this->info_attr_transform_pre[$k]);
-                else $this->info_attr_transform_pre[$k] = $v;
-            }
-            foreach($module->info_attr_transform_post as $k => $v) {
-                if ($v === false) unset($this->info_attr_transform_post[$k]);
-                else $this->info_attr_transform_post[$k] = $v;
-            }
-            foreach ($module->info_injector as $k => $v) {
-                if ($v === false) unset($this->info_injector[$k]);
-                else $this->info_injector[$k] = $v;
-            }
-        }
-
-        $this->info = $this->manager->getElements();
-        $this->info_content_sets = $this->manager->contentSets->lookup;
-
-    }
-
-    /**
-     * Sets up stuff based on config. We need a better way of doing this.
-     */
-    protected function setupConfigStuff($config) {
-
-        $block_wrapper = $config->get('HTML.BlockWrapper');
-        if (isset($this->info_content_sets['Block'][$block_wrapper])) {
-            $this->info_block_wrapper = $block_wrapper;
-        } else {
-            trigger_error('Cannot use non-block element as block wrapper',
-                E_USER_ERROR);
-        }
-
-        $parent = $config->get('HTML.Parent');
-        $def = $this->manager->getElement($parent, true);
-        if ($def) {
-            $this->info_parent = $parent;
-            $this->info_parent_def = $def;
-        } else {
-            trigger_error('Cannot use unrecognized element as parent',
-                E_USER_ERROR);
-            $this->info_parent_def = $this->manager->getElement($this->info_parent, true);
-        }
-
-        // support template text
-        $support = "(for information on implementing this, see the ".
-                   "support forums) ";
-
-        // setup allowed elements -----------------------------------------
-
-        $allowed_elements = $config->get('HTML.AllowedElements');
-        $allowed_attributes = $config->get('HTML.AllowedAttributes'); // retrieve early
-
-        if (!is_array($allowed_elements) && !is_array($allowed_attributes)) {
-            $allowed = $config->get('HTML.Allowed');
-            if (is_string($allowed)) {
-                list($allowed_elements, $allowed_attributes) = $this->parseTinyMCEAllowedList($allowed);
-            }
-        }
-
-        if (is_array($allowed_elements)) {
-            foreach ($this->info as $name => $d) {
-                if(!isset($allowed_elements[$name])) unset($this->info[$name]);
-                unset($allowed_elements[$name]);
-            }
-            // emit errors
-            foreach ($allowed_elements as $element => $d) {
-                $element = htmlspecialchars($element); // PHP doesn't escape errors, be careful!
-                trigger_error("Element '$element' is not supported $support", E_USER_WARNING);
-            }
-        }
-
-        // setup allowed attributes ---------------------------------------
-
-        $allowed_attributes_mutable = $allowed_attributes; // by copy!
-        if (is_array($allowed_attributes)) {
-
-            // This actually doesn't do anything, since we went away from
-            // global attributes. It's possible that userland code uses
-            // it, but HTMLModuleManager doesn't!
-            foreach ($this->info_global_attr as $attr => $x) {
-                $keys = array($attr, "*@$attr", "*.$attr");
-                $delete = true;
-                foreach ($keys as $key) {
-                    if ($delete && isset($allowed_attributes[$key])) {
-                        $delete = false;
-                    }
-                    if (isset($allowed_attributes_mutable[$key])) {
-                        unset($allowed_attributes_mutable[$key]);
-                    }
-                }
-                if ($delete) unset($this->info_global_attr[$attr]);
-            }
-
-            foreach ($this->info as $tag => $info) {
-                foreach ($info->attr as $attr => $x) {
-                    $keys = array("$tag@$attr", $attr, "*@$attr", "$tag.$attr", "*.$attr");
-                    $delete = true;
-                    foreach ($keys as $key) {
-                        if ($delete && isset($allowed_attributes[$key])) {
-                            $delete = false;
-                        }
-                        if (isset($allowed_attributes_mutable[$key])) {
-                            unset($allowed_attributes_mutable[$key]);
-                        }
-                    }
-                    if ($delete) unset($this->info[$tag]->attr[$attr]);
-                }
-            }
-            // emit errors
-            foreach ($allowed_attributes_mutable as $elattr => $d) {
-                $bits = preg_split('/[.@]/', $elattr, 2);
-                $c = count($bits);
-                switch ($c) {
-                    case 2:
-                        if ($bits[0] !== '*') {
-                            $element = htmlspecialchars($bits[0]);
-                            $attribute = htmlspecialchars($bits[1]);
-                            if (!isset($this->info[$element])) {
-                                trigger_error("Cannot allow attribute '$attribute' if element '$element' is not allowed/supported $support");
-                            } else {
-                                trigger_error("Attribute '$attribute' in element '$element' not supported $support",
-                                    E_USER_WARNING);
-                            }
-                            break;
-                        }
-                        // otherwise fall through
-                    case 1:
-                        $attribute = htmlspecialchars($bits[0]);
-                        trigger_error("Global attribute '$attribute' is not ".
-                            "supported in any elements $support",
-                            E_USER_WARNING);
-                        break;
-                }
-            }
-
-        }
-
-        // setup forbidden elements ---------------------------------------
-
-        $forbidden_elements   = $config->get('HTML.ForbiddenElements');
-        $forbidden_attributes = $config->get('HTML.ForbiddenAttributes');
-
-        foreach ($this->info as $tag => $info) {
-            if (isset($forbidden_elements[$tag])) {
-                unset($this->info[$tag]);
-                continue;
-            }
-            foreach ($info->attr as $attr => $x) {
-                if (
-                    isset($forbidden_attributes["$tag@$attr"]) ||
-                    isset($forbidden_attributes["*@$attr"]) ||
-                    isset($forbidden_attributes[$attr])
-                ) {
-                    unset($this->info[$tag]->attr[$attr]);
-                    continue;
-                } // this segment might get removed eventually
-                elseif (isset($forbidden_attributes["$tag.$attr"])) {
-                    // $tag.$attr are not user supplied, so no worries!
-                    trigger_error("Error with $tag.$attr: tag.attr syntax not supported for HTML.ForbiddenAttributes; use tag@attr instead", E_USER_WARNING);
-                }
-            }
-        }
-        foreach ($forbidden_attributes as $key => $v) {
-            if (strlen($key) < 2) continue;
-            if ($key[0] != '*') continue;
-            if ($key[1] == '.') {
-                trigger_error("Error with $key: *.attr syntax not supported for HTML.ForbiddenAttributes; use attr instead", E_USER_WARNING);
-            }
-        }
-
-        // setup injectors -----------------------------------------------------
-        foreach ($this->info_injector as $i => $injector) {
-            if ($injector->checkNeeded($config) !== false) {
-                // remove injector that does not have it's required
-                // elements/attributes present, and is thus not needed.
-                unset($this->info_injector[$i]);
-            }
-        }
-    }
-
-    /**
-     * Parses a TinyMCE-flavored Allowed Elements and Attributes list into
-     * separate lists for processing. Format is element[attr1|attr2],element2...
-     * @warning Although it's largely drawn from TinyMCE's implementation,
-     *      it is different, and you'll probably have to modify your lists
-     * @param $list String list to parse
-     * @param array($allowed_elements, $allowed_attributes)
-     * @todo Give this its own class, probably static interface
-     */
-    public function parseTinyMCEAllowedList($list) {
-
-        $list = str_replace(array(' ', "\t"), '', $list);
-
-        $elements = array();
-        $attributes = array();
-
-        $chunks = preg_split('/(,|[\n\r]+)/', $list);
-        foreach ($chunks as $chunk) {
-            if (empty($chunk)) continue;
-            // remove TinyMCE element control characters
-            if (!strpos($chunk, '[')) {
-                $element = $chunk;
-                $attr = false;
-            } else {
-                list($element, $attr) = explode('[', $chunk);
-            }
-            if ($element !== '*') $elements[$element] = true;
-            if (!$attr) continue;
-            $attr = substr($attr, 0, strlen($attr) - 1); // remove trailing ]
-            $attr = explode('|', $attr);
-            foreach ($attr as $key) {
-                $attributes["$element.$key"] = true;
-            }
-        }
-
-        return array($elements, $attributes);
-
-    }
-
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule.php
deleted file mode 100644
index 072cf68084..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule.php
+++ /dev/null
@@ -1,244 +0,0 @@
-<?php
-
-/**
- * Represents an XHTML 1.1 module, with information on elements, tags
- * and attributes.
- * @note Even though this is technically XHTML 1.1, it is also used for
- *       regular HTML parsing. We are using modulization as a convenient
- *       way to represent the internals of HTMLDefinition, and our
- *       implementation is by no means conforming and does not directly
- *       use the normative DTDs or XML schemas.
- * @note The public variables in a module should almost directly
- *       correspond to the variables in HTMLPurifier_HTMLDefinition.
- *       However, the prefix info carries no special meaning in these
- *       objects (include it anyway if that's the correspondence though).
- * @todo Consider making some member functions protected
- */
-
-class HTMLPurifier_HTMLModule
-{
-
-    // -- Overloadable ----------------------------------------------------
-
-    /**
-     * Short unique string identifier of the module
-     */
-    public $name;
-
-    /**
-     * Informally, a list of elements this module changes. Not used in
-     * any significant way.
-     */
-    public $elements = array();
-
-    /**
-     * Associative array of element names to element definitions.
-     * Some definitions may be incomplete, to be merged in later
-     * with the full definition.
-     */
-    public $info = array();
-
-    /**
-     * Associative array of content set names to content set additions.
-     * This is commonly used to, say, add an A element to the Inline
-     * content set. This corresponds to an internal variable $content_sets
-     * and NOT info_content_sets member variable of HTMLDefinition.
-     */
-    public $content_sets = array();
-
-    /**
-     * Associative array of attribute collection names to attribute
-     * collection additions. More rarely used for adding attributes to
-     * the global collections. Example is the StyleAttribute module adding
-     * the style attribute to the Core. Corresponds to HTMLDefinition's
-     * attr_collections->info, since the object's data is only info,
-     * with extra behavior associated with it.
-     */
-    public $attr_collections = array();
-
-    /**
-     * Associative array of deprecated tag name to HTMLPurifier_TagTransform
-     */
-    public $info_tag_transform = array();
-
-    /**
-     * List of HTMLPurifier_AttrTransform to be performed before validation.
-     */
-    public $info_attr_transform_pre = array();
-
-    /**
-     * List of HTMLPurifier_AttrTransform to be performed after validation.
-     */
-    public $info_attr_transform_post = array();
-
-    /**
-     * List of HTMLPurifier_Injector to be performed during well-formedness fixing.
-     * An injector will only be invoked if all of it's pre-requisites are met;
-     * if an injector fails setup, there will be no error; it will simply be
-     * silently disabled.
-     */
-    public $info_injector = array();
-
-    /**
-     * Boolean flag that indicates whether or not getChildDef is implemented.
-     * For optimization reasons: may save a call to a function. Be sure
-     * to set it if you do implement getChildDef(), otherwise it will have
-     * no effect!
-     */
-    public $defines_child_def = false;
-
-    /**
-     * Boolean flag whether or not this module is safe. If it is not safe, all
-     * of its members are unsafe. Modules are safe by default (this might be
-     * slightly dangerous, but it doesn't make much sense to force HTML Purifier,
-     * which is based off of safe HTML, to explicitly say, "This is safe," even
-     * though there are modules which are "unsafe")
-     *
-     * @note Previously, safety could be applied at an element level granularity.
-     *       We've removed this ability, so in order to add "unsafe" elements
-     *       or attributes, a dedicated module with this property set to false
-     *       must be used.
-     */
-    public $safe = true;
-
-    /**
-     * Retrieves a proper HTMLPurifier_ChildDef subclass based on
-     * content_model and content_model_type member variables of
-     * the HTMLPurifier_ElementDef class. There is a similar function
-     * in HTMLPurifier_HTMLDefinition.
-     * @param $def HTMLPurifier_ElementDef instance
-     * @return HTMLPurifier_ChildDef subclass
-     */
-    public function getChildDef($def) {return false;}
-
-    // -- Convenience -----------------------------------------------------
-
-    /**
-     * Convenience function that sets up a new element
-     * @param $element Name of element to add
-     * @param $type What content set should element be registered to?
-     *              Set as false to skip this step.
-     * @param $contents Allowed children in form of:
-     *              "$content_model_type: $content_model"
-     * @param $attr_includes What attribute collections to register to
-     *              element?
-     * @param $attr What unique attributes does the element define?
-     * @note See ElementDef for in-depth descriptions of these parameters.
-     * @return Created element definition object, so you
-     *         can set advanced parameters
-     */
-    public function addElement($element, $type, $contents, $attr_includes = array(), $attr = array()) {
-        $this->elements[] = $element;
-        // parse content_model
-        list($content_model_type, $content_model) = $this->parseContents($contents);
-        // merge in attribute inclusions
-        $this->mergeInAttrIncludes($attr, $attr_includes);
-        // add element to content sets
-        if ($type) $this->addElementToContentSet($element, $type);
-        // create element
-        $this->info[$element] = HTMLPurifier_ElementDef::create(
-            $content_model, $content_model_type, $attr
-        );
-        // literal object $contents means direct child manipulation
-        if (!is_string($contents)) $this->info[$element]->child = $contents;
-        return $this->info[$element];
-    }
-
-    /**
-     * Convenience function that creates a totally blank, non-standalone
-     * element.
-     * @param $element Name of element to create
-     * @return Created element
-     */
-    public function addBlankElement($element) {
-        if (!isset($this->info[$element])) {
-            $this->elements[] = $element;
-            $this->info[$element] = new HTMLPurifier_ElementDef();
-            $this->info[$element]->standalone = false;
-        } else {
-            trigger_error("Definition for $element already exists in module, cannot redefine");
-        }
-        return $this->info[$element];
-    }
-
-    /**
-     * Convenience function that registers an element to a content set
-     * @param Element to register
-     * @param Name content set (warning: case sensitive, usually upper-case
-     *        first letter)
-     */
-    public function addElementToContentSet($element, $type) {
-        if (!isset($this->content_sets[$type])) $this->content_sets[$type] = '';
-        else $this->content_sets[$type] .= ' | ';
-        $this->content_sets[$type] .= $element;
-    }
-
-    /**
-     * Convenience function that transforms single-string contents
-     * into separate content model and content model type
-     * @param $contents Allowed children in form of:
-     *                  "$content_model_type: $content_model"
-     * @note If contents is an object, an array of two nulls will be
-     *       returned, and the callee needs to take the original $contents
-     *       and use it directly.
-     */
-    public function parseContents($contents) {
-        if (!is_string($contents)) return array(null, null); // defer
-        switch ($contents) {
-            // check for shorthand content model forms
-            case 'Empty':
-                return array('empty', '');
-            case 'Inline':
-                return array('optional', 'Inline | #PCDATA');
-            case 'Flow':
-                return array('optional', 'Flow | #PCDATA');
-        }
-        list($content_model_type, $content_model) = explode(':', $contents);
-        $content_model_type = strtolower(trim($content_model_type));
-        $content_model = trim($content_model);
-        return array($content_model_type, $content_model);
-    }
-
-    /**
-     * Convenience function that merges a list of attribute includes into
-     * an attribute array.
-     * @param $attr Reference to attr array to modify
-     * @param $attr_includes Array of includes / string include to merge in
-     */
-    public function mergeInAttrIncludes(&$attr, $attr_includes) {
-        if (!is_array($attr_includes)) {
-            if (empty($attr_includes)) $attr_includes = array();
-            else $attr_includes = array($attr_includes);
-        }
-        $attr[0] = $attr_includes;
-    }
-
-    /**
-     * Convenience function that generates a lookup table with boolean
-     * true as value.
-     * @param $list List of values to turn into a lookup
-     * @note You can also pass an arbitrary number of arguments in
-     *       place of the regular argument
-     * @return Lookup array equivalent of list
-     */
-    public function makeLookup($list) {
-        if (is_string($list)) $list = func_get_args();
-        $ret = array();
-        foreach ($list as $value) {
-            if (is_null($value)) continue;
-            $ret[$value] = true;
-        }
-        return $ret;
-    }
-
-    /**
-     * Lazy load construction of the module after determining whether
-     * or not it's needed, and also when a finalized configuration object
-     * is available.
-     * @param $config Instance of HTMLPurifier_Config
-     */
-    public function setup($config) {}
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Bdo.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Bdo.php
deleted file mode 100644
index 3d66f1b4e1..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Bdo.php
+++ /dev/null
@@ -1,31 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Bi-directional Text Module, defines elements that
- * declare directionality of content. Text Extension Module.
- */
-class HTMLPurifier_HTMLModule_Bdo extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'Bdo';
-    public $attr_collections = array(
-        'I18N' => array('dir' => false)
-    );
-
-    public function setup($config) {
-        $bdo = $this->addElement(
-            'bdo', 'Inline', 'Inline', array('Core', 'Lang'),
-            array(
-                'dir' => 'Enum#ltr,rtl', // required
-                // The Abstract Module specification has the attribute
-                // inclusions wrong for bdo: bdo allows Lang
-            )
-        );
-        $bdo->attr_transform_post['required-dir'] = new HTMLPurifier_AttrTransform_BdoDir();
-
-        $this->attr_collections['I18N']['dir'] = 'Enum#ltr,rtl';
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/CommonAttributes.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/CommonAttributes.php
deleted file mode 100644
index 7c15da84fc..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/CommonAttributes.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-
-class HTMLPurifier_HTMLModule_CommonAttributes extends HTMLPurifier_HTMLModule
-{
-    public $name = 'CommonAttributes';
-
-    public $attr_collections = array(
-        'Core' => array(
-            0 => array('Style'),
-            // 'xml:space' => false,
-            'class' => 'Class',
-            'id' => 'ID',
-            'title' => 'CDATA',
-        ),
-        'Lang' => array(),
-        'I18N' => array(
-            0 => array('Lang'), // proprietary, for xml:lang/lang
-        ),
-        'Common' => array(
-            0 => array('Core', 'I18N')
-        )
-    );
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Edit.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Edit.php
deleted file mode 100644
index ff93690555..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Edit.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Edit Module, defines editing-related elements. Text Extension
- * Module.
- */
-class HTMLPurifier_HTMLModule_Edit extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'Edit';
-
-    public function setup($config) {
-        $contents = 'Chameleon: #PCDATA | Inline ! #PCDATA | Flow';
-        $attr = array(
-            'cite' => 'URI',
-            // 'datetime' => 'Datetime', // not implemented
-        );
-        $this->addElement('del', 'Inline', $contents, 'Common', $attr);
-        $this->addElement('ins', 'Inline', $contents, 'Common', $attr);
-    }
-
-    // HTML 4.01 specifies that ins/del must not contain block
-    // elements when used in an inline context, chameleon is
-    // a complicated workaround to acheive this effect
-
-    // Inline context ! Block context (exclamation mark is
-    // separator, see getChildDef for parsing)
-
-    public $defines_child_def = true;
-    public function getChildDef($def) {
-        if ($def->content_model_type != 'chameleon') return false;
-        $value = explode('!', $def->content_model);
-        return new HTMLPurifier_ChildDef_Chameleon($value[0], $value[1]);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Forms.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Forms.php
deleted file mode 100644
index 44c22f6f8b..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Forms.php
+++ /dev/null
@@ -1,118 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Forms module, defines all form-related elements found in HTML 4.
- */
-class HTMLPurifier_HTMLModule_Forms extends HTMLPurifier_HTMLModule
-{
-    public $name = 'Forms';
-    public $safe = false;
-
-    public $content_sets = array(
-        'Block' => 'Form',
-        'Inline' => 'Formctrl',
-    );
-
-    public function setup($config) {
-        $form = $this->addElement('form', 'Form',
-          'Required: Heading | List | Block | fieldset', 'Common', array(
-            'accept' => 'ContentTypes',
-            'accept-charset' => 'Charsets',
-            'action*' => 'URI',
-            'method' => 'Enum#get,post',
-            // really ContentType, but these two are the only ones used today
-            'enctype' => 'Enum#application/x-www-form-urlencoded,multipart/form-data',
-        ));
-        $form->excludes = array('form' => true);
-
-        $input = $this->addElement('input', 'Formctrl', 'Empty', 'Common', array(
-            'accept' => 'ContentTypes',
-            'accesskey' => 'Character',
-            'alt' => 'Text',
-            'checked' => 'Bool#checked',
-            'disabled' => 'Bool#disabled',
-            'maxlength' => 'Number',
-            'name' => 'CDATA',
-            'readonly' => 'Bool#readonly',
-            'size' => 'Number',
-            'src' => 'URI#embeds',
-            'tabindex' => 'Number',
-            'type' => 'Enum#text,password,checkbox,button,radio,submit,reset,file,hidden,image',
-            'value' => 'CDATA',
-        ));
-        $input->attr_transform_post[] = new HTMLPurifier_AttrTransform_Input();
-
-        $this->addElement('select', 'Formctrl', 'Required: optgroup | option', 'Common', array(
-            'disabled' => 'Bool#disabled',
-            'multiple' => 'Bool#multiple',
-            'name' => 'CDATA',
-            'size' => 'Number',
-            'tabindex' => 'Number',
-        ));
-
-        $this->addElement('option', false, 'Optional: #PCDATA', 'Common', array(
-            'disabled' => 'Bool#disabled',
-            'label' => 'Text',
-            'selected' => 'Bool#selected',
-            'value' => 'CDATA',
-        ));
-        // It's illegal for there to be more than one selected, but not
-        // be multiple. Also, no selected means undefined behavior. This might
-        // be difficult to implement; perhaps an injector, or a context variable.
-
-        $textarea = $this->addElement('textarea', 'Formctrl', 'Optional: #PCDATA', 'Common', array(
-            'accesskey' => 'Character',
-            'cols*' => 'Number',
-            'disabled' => 'Bool#disabled',
-            'name' => 'CDATA',
-            'readonly' => 'Bool#readonly',
-            'rows*' => 'Number',
-            'tabindex' => 'Number',
-        ));
-        $textarea->attr_transform_pre[] = new HTMLPurifier_AttrTransform_Textarea();
-
-        $button = $this->addElement('button', 'Formctrl', 'Optional: #PCDATA | Heading | List | Block | Inline', 'Common', array(
-            'accesskey' => 'Character',
-            'disabled' => 'Bool#disabled',
-            'name' => 'CDATA',
-            'tabindex' => 'Number',
-            'type' => 'Enum#button,submit,reset',
-            'value' => 'CDATA',
-        ));
-
-        // For exclusions, ideally we'd specify content sets, not literal elements
-        $button->excludes = $this->makeLookup(
-            'form', 'fieldset', // Form
-            'input', 'select', 'textarea', 'label', 'button', // Formctrl
-            'a' // as per HTML 4.01 spec, this is omitted by modularization
-        );
-
-        // Extra exclusion: img usemap="" is not permitted within this element.
-        // We'll omit this for now, since we don't have any good way of
-        // indicating it yet.
-
-        // This is HIGHLY user-unfriendly; we need a custom child-def for this
-        $this->addElement('fieldset', 'Form', 'Custom: (#WS?,legend,(Flow|#PCDATA)*)', 'Common');
-
-        $label = $this->addElement('label', 'Formctrl', 'Optional: #PCDATA | Inline', 'Common', array(
-            'accesskey' => 'Character',
-            // 'for' => 'IDREF', // IDREF not implemented, cannot allow
-        ));
-        $label->excludes = array('label' => true);
-
-        $this->addElement('legend', false, 'Optional: #PCDATA | Inline', 'Common', array(
-            'accesskey' => 'Character',
-        ));
-
-        $this->addElement('optgroup', false, 'Required: option', 'Common', array(
-            'disabled' => 'Bool#disabled',
-            'label*' => 'Text',
-        ));
-
-        // Don't forget an injector for <isindex>. This one's a little complex
-        // because it maps to multiple elements.
-
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Hypertext.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Hypertext.php
deleted file mode 100644
index d7e9bdd27e..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Hypertext.php
+++ /dev/null
@@ -1,31 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Hypertext Module, defines hypertext links. Core Module.
- */
-class HTMLPurifier_HTMLModule_Hypertext extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'Hypertext';
-
-    public function setup($config) {
-        $a = $this->addElement(
-            'a', 'Inline', 'Inline', 'Common',
-            array(
-                // 'accesskey' => 'Character',
-                // 'charset' => 'Charset',
-                'href' => 'URI',
-                // 'hreflang' => 'LanguageCode',
-                'rel' => new HTMLPurifier_AttrDef_HTML_LinkTypes('rel'),
-                'rev' => new HTMLPurifier_AttrDef_HTML_LinkTypes('rev'),
-                // 'tabindex' => 'Number',
-                // 'type' => 'ContentType',
-            )
-        );
-        $a->formatting = true;
-        $a->excludes = array('a' => true);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Image.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Image.php
deleted file mode 100644
index 948d435bcd..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Image.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Image Module provides basic image embedding.
- * @note There is specialized code for removing empty images in
- *       HTMLPurifier_Strategy_RemoveForeignElements
- */
-class HTMLPurifier_HTMLModule_Image extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'Image';
-
-    public function setup($config) {
-        $max = $config->get('HTML.MaxImgLength');
-        $img = $this->addElement(
-            'img', 'Inline', 'Empty', 'Common',
-            array(
-                'alt*' => 'Text',
-                // According to the spec, it's Length, but percents can
-                // be abused, so we allow only Pixels.
-                'height' => 'Pixels#' . $max,
-                'width'  => 'Pixels#' . $max,
-                'longdesc' => 'URI',
-                'src*' => new HTMLPurifier_AttrDef_URI(true), // embedded
-            )
-        );
-        if ($max === null || $config->get('HTML.Trusted')) {
-            $img->attr['height'] =
-            $img->attr['width'] = 'Length';
-        }
-
-        // kind of strange, but splitting things up would be inefficient
-        $img->attr_transform_pre[] =
-        $img->attr_transform_post[] =
-            new HTMLPurifier_AttrTransform_ImgRequired();
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Legacy.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Legacy.php
deleted file mode 100644
index df33927ba6..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Legacy.php
+++ /dev/null
@@ -1,143 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Legacy module defines elements that were previously
- * deprecated.
- *
- * @note Not all legacy elements have been implemented yet, which
- *       is a bit of a reverse problem as compared to browsers! In
- *       addition, this legacy module may implement a bit more than
- *       mandated by XHTML 1.1.
- *
- * This module can be used in combination with TransformToStrict in order
- * to transform as many deprecated elements as possible, but retain
- * questionably deprecated elements that do not have good alternatives
- * as well as transform elements that don't have an implementation.
- * See docs/ref-strictness.txt for more details.
- */
-
-class HTMLPurifier_HTMLModule_Legacy extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'Legacy';
-
-    public function setup($config) {
-
-        $this->addElement('basefont', 'Inline', 'Empty', false, array(
-            'color' => 'Color',
-            'face' => 'Text', // extremely broad, we should
-            'size' => 'Text', // tighten it
-            'id' => 'ID'
-        ));
-        $this->addElement('center', 'Block', 'Flow', 'Common');
-        $this->addElement('dir', 'Block', 'Required: li', 'Common', array(
-            'compact' => 'Bool#compact'
-        ));
-        $this->addElement('font', 'Inline', 'Inline', array('Core', 'I18N'), array(
-            'color' => 'Color',
-            'face' => 'Text', // extremely broad, we should
-            'size' => 'Text', // tighten it
-        ));
-        $this->addElement('menu', 'Block', 'Required: li', 'Common', array(
-            'compact' => 'Bool#compact'
-        ));
-
-        $s = $this->addElement('s', 'Inline', 'Inline', 'Common');
-        $s->formatting = true;
-
-        $strike = $this->addElement('strike', 'Inline', 'Inline', 'Common');
-        $strike->formatting = true;
-
-        $u = $this->addElement('u', 'Inline', 'Inline', 'Common');
-        $u->formatting = true;
-
-        // setup modifications to old elements
-
-        $align = 'Enum#left,right,center,justify';
-
-        $address = $this->addBlankElement('address');
-        $address->content_model = 'Inline | #PCDATA | p';
-        $address->content_model_type = 'optional';
-        $address->child = false;
-
-        $blockquote = $this->addBlankElement('blockquote');
-        $blockquote->content_model = 'Flow | #PCDATA';
-        $blockquote->content_model_type = 'optional';
-        $blockquote->child = false;
-
-        $br = $this->addBlankElement('br');
-        $br->attr['clear'] = 'Enum#left,all,right,none';
-
-        $caption = $this->addBlankElement('caption');
-        $caption->attr['align'] = 'Enum#top,bottom,left,right';
-
-        $div = $this->addBlankElement('div');
-        $div->attr['align'] = $align;
-
-        $dl = $this->addBlankElement('dl');
-        $dl->attr['compact'] = 'Bool#compact';
-
-        for ($i = 1; $i <= 6; $i++) {
-            $h = $this->addBlankElement("h$i");
-            $h->attr['align'] = $align;
-        }
-
-        $hr = $this->addBlankElement('hr');
-        $hr->attr['align'] = $align;
-        $hr->attr['noshade'] = 'Bool#noshade';
-        $hr->attr['size'] = 'Pixels';
-        $hr->attr['width'] = 'Length';
-
-        $img = $this->addBlankElement('img');
-        $img->attr['align'] = 'Enum#top,middle,bottom,left,right';
-        $img->attr['border'] = 'Pixels';
-        $img->attr['hspace'] = 'Pixels';
-        $img->attr['vspace'] = 'Pixels';
-
-        // figure out this integer business
-
-        $li = $this->addBlankElement('li');
-        $li->attr['value'] = new HTMLPurifier_AttrDef_Integer();
-        $li->attr['type']  = 'Enum#s:1,i,I,a,A,disc,square,circle';
-
-        $ol = $this->addBlankElement('ol');
-        $ol->attr['compact'] = 'Bool#compact';
-        $ol->attr['start'] = new HTMLPurifier_AttrDef_Integer();
-        $ol->attr['type'] = 'Enum#s:1,i,I,a,A';
-
-        $p = $this->addBlankElement('p');
-        $p->attr['align'] = $align;
-
-        $pre = $this->addBlankElement('pre');
-        $pre->attr['width'] = 'Number';
-
-        // script omitted
-
-        $table = $this->addBlankElement('table');
-        $table->attr['align'] = 'Enum#left,center,right';
-        $table->attr['bgcolor'] = 'Color';
-
-        $tr = $this->addBlankElement('tr');
-        $tr->attr['bgcolor'] = 'Color';
-
-        $th = $this->addBlankElement('th');
-        $th->attr['bgcolor'] = 'Color';
-        $th->attr['height'] = 'Length';
-        $th->attr['nowrap'] = 'Bool#nowrap';
-        $th->attr['width'] = 'Length';
-
-        $td = $this->addBlankElement('td');
-        $td->attr['bgcolor'] = 'Color';
-        $td->attr['height'] = 'Length';
-        $td->attr['nowrap'] = 'Bool#nowrap';
-        $td->attr['width'] = 'Length';
-
-        $ul = $this->addBlankElement('ul');
-        $ul->attr['compact'] = 'Bool#compact';
-        $ul->attr['type'] = 'Enum#square,disc,circle';
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/List.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/List.php
deleted file mode 100644
index 1d15f27293..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/List.php
+++ /dev/null
@@ -1,35 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 List Module, defines list-oriented elements. Core Module.
- */
-class HTMLPurifier_HTMLModule_List extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'List';
-
-    // According to the abstract schema, the List content set is a fully formed
-    // one or more expr, but it invariably occurs in an optional declaration
-    // so we're not going to do that subtlety. It might cause trouble
-    // if a user defines "List" and expects that multiple lists are
-    // allowed to be specified, but then again, that's not very intuitive.
-    // Furthermore, the actual XML Schema may disagree. Regardless,
-    // we don't have support for such nested expressions without using
-    // the incredibly inefficient and draconic Custom ChildDef.
-
-    public $content_sets = array('Flow' => 'List');
-
-    public function setup($config) {
-        $this->addElement('ol', 'List', 'Required: li', 'Common');
-        $this->addElement('ul', 'List', 'Required: li', 'Common');
-        $this->addElement('dl', 'List', 'Required: dt | dd', 'Common');
-
-        $this->addElement('li', false, 'Flow', 'Common');
-
-        $this->addElement('dd', false, 'Flow', 'Common');
-        $this->addElement('dt', false, 'Inline', 'Common');
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Name.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Name.php
deleted file mode 100644
index 05694b4504..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Name.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-class HTMLPurifier_HTMLModule_Name extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'Name';
-
-    public function setup($config) {
-        $elements = array('a', 'applet', 'form', 'frame', 'iframe', 'img', 'map');
-        foreach ($elements as $name) {
-            $element = $this->addBlankElement($name);
-            $element->attr['name'] = 'CDATA';
-            if (!$config->get('HTML.Attr.Name.UseCDATA')) {
-                $element->attr_transform_post['NameSync'] = new HTMLPurifier_AttrTransform_NameSync();
-            }
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php
deleted file mode 100644
index 5f1b14abb8..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php
+++ /dev/null
@@ -1,14 +0,0 @@
-<?php
-
-class HTMLPurifier_HTMLModule_NonXMLCommonAttributes extends HTMLPurifier_HTMLModule
-{
-    public $name = 'NonXMLCommonAttributes';
-
-    public $attr_collections = array(
-        'Lang' => array(
-            'lang' => 'LanguageCode',
-        )
-    );
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Object.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Object.php
deleted file mode 100644
index 193c1011f8..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Object.php
+++ /dev/null
@@ -1,47 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Object Module, defines elements for generic object inclusion
- * @warning Users will commonly use <embed> to cater to legacy browsers: this
- *      module does not allow this sort of behavior
- */
-class HTMLPurifier_HTMLModule_Object extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'Object';
-    public $safe = false;
-
-    public function setup($config) {
-
-        $this->addElement('object', 'Inline', 'Optional: #PCDATA | Flow | param', 'Common',
-            array(
-                'archive' => 'URI',
-                'classid' => 'URI',
-                'codebase' => 'URI',
-                'codetype' => 'Text',
-                'data' => 'URI',
-                'declare' => 'Bool#declare',
-                'height' => 'Length',
-                'name' => 'CDATA',
-                'standby' => 'Text',
-                'tabindex' => 'Number',
-                'type' => 'ContentType',
-                'width' => 'Length'
-            )
-        );
-
-        $this->addElement('param', false, 'Empty', false,
-            array(
-                'id' => 'ID',
-                'name*' => 'Text',
-                'type' => 'Text',
-                'value' => 'Text',
-                'valuetype' => 'Enum#data,ref,object'
-           )
-        );
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Presentation.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Presentation.php
deleted file mode 100644
index 8ff0b5ed78..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Presentation.php
+++ /dev/null
@@ -1,36 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Presentation Module, defines simple presentation-related
- * markup. Text Extension Module.
- * @note The official XML Schema and DTD specs further divide this into
- *       two modules:
- *          - Block Presentation (hr)
- *          - Inline Presentation (b, big, i, small, sub, sup, tt)
- *       We have chosen not to heed this distinction, as content_sets
- *       provides satisfactory disambiguation.
- */
-class HTMLPurifier_HTMLModule_Presentation extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'Presentation';
-
-    public function setup($config) {
-        $this->addElement('hr',     'Block',  'Empty',  'Common');
-        $this->addElement('sub',    'Inline', 'Inline', 'Common');
-        $this->addElement('sup',    'Inline', 'Inline', 'Common');
-        $b = $this->addElement('b',      'Inline', 'Inline', 'Common');
-        $b->formatting = true;
-        $big = $this->addElement('big',    'Inline', 'Inline', 'Common');
-        $big->formatting = true;
-        $i = $this->addElement('i',      'Inline', 'Inline', 'Common');
-        $i->formatting = true;
-        $small = $this->addElement('small',  'Inline', 'Inline', 'Common');
-        $small->formatting = true;
-        $tt = $this->addElement('tt',     'Inline', 'Inline', 'Common');
-        $tt->formatting = true;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Proprietary.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Proprietary.php
deleted file mode 100644
index dd36a3de0e..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Proprietary.php
+++ /dev/null
@@ -1,33 +0,0 @@
-<?php
-
-/**
- * Module defines proprietary tags and attributes in HTML.
- * @warning If this module is enabled, standards-compliance is off!
- */
-class HTMLPurifier_HTMLModule_Proprietary extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'Proprietary';
-
-    public function setup($config) {
-
-        $this->addElement('marquee', 'Inline', 'Flow', 'Common',
-            array(
-                'direction' => 'Enum#left,right,up,down',
-                'behavior' => 'Enum#alternate',
-                'width' => 'Length',
-                'height' => 'Length',
-                'scrolldelay' => 'Number',
-                'scrollamount' => 'Number',
-                'loop' => 'Number',
-                'bgcolor' => 'Color',
-                'hspace' => 'Pixels',
-                'vspace' => 'Pixels',
-            )
-        );
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Ruby.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Ruby.php
deleted file mode 100644
index b26a0a30a0..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Ruby.php
+++ /dev/null
@@ -1,27 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Ruby Annotation Module, defines elements that indicate
- * short runs of text alongside base text for annotation or pronounciation.
- */
-class HTMLPurifier_HTMLModule_Ruby extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'Ruby';
-
-    public function setup($config) {
-        $this->addElement('ruby', 'Inline',
-            'Custom: ((rb, (rt | (rp, rt, rp))) | (rbc, rtc, rtc?))',
-            'Common');
-        $this->addElement('rbc', false, 'Required: rb', 'Common');
-        $this->addElement('rtc', false, 'Required: rt', 'Common');
-        $rb = $this->addElement('rb', false, 'Inline', 'Common');
-        $rb->excludes = array('ruby' => true);
-        $rt = $this->addElement('rt', false, 'Inline', 'Common', array('rbspan' => 'Number'));
-        $rt->excludes = array('ruby' => true);
-        $this->addElement('rp', false, 'Optional: #PCDATA', 'Common');
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/SafeEmbed.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/SafeEmbed.php
deleted file mode 100644
index 8fc03cb1c7..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/SafeEmbed.php
+++ /dev/null
@@ -1,33 +0,0 @@
-<?php
-
-/**
- * A "safe" embed module. See SafeObject. This is a proprietary element.
- */
-class HTMLPurifier_HTMLModule_SafeEmbed extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'SafeEmbed';
-
-    public function setup($config) {
-
-        $max = $config->get('HTML.MaxImgLength');
-        $embed = $this->addElement(
-            'embed', 'Inline', 'Empty', 'Common',
-            array(
-                'src*' => 'URI#embedded',
-                'type' => 'Enum#application/x-shockwave-flash',
-                'width' => 'Pixels#' . $max,
-                'height' => 'Pixels#' . $max,
-                'allowscriptaccess' => 'Enum#never',
-                'allownetworking' => 'Enum#internal',
-                'wmode' => 'Enum#window',
-                'name' => 'ID',
-            )
-        );
-        $embed->attr_transform_post[] = new HTMLPurifier_AttrTransform_SafeEmbed();
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/SafeObject.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/SafeObject.php
deleted file mode 100644
index 33bac00cf2..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/SafeObject.php
+++ /dev/null
@@ -1,50 +0,0 @@
-<?php
-
-/**
- * A "safe" object module. In theory, objects permitted by this module will
- * be safe, and untrusted users can be allowed to embed arbitrary flash objects
- * (maybe other types too, but only Flash is supported as of right now).
- * Highly experimental.
- */
-class HTMLPurifier_HTMLModule_SafeObject extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'SafeObject';
-
-    public function setup($config) {
-
-        // These definitions are not intrinsically safe: the attribute transforms
-        // are a vital part of ensuring safety.
-
-        $max = $config->get('HTML.MaxImgLength');
-        $object = $this->addElement(
-            'object',
-            'Inline',
-            'Optional: param | Flow | #PCDATA',
-            'Common',
-            array(
-                // While technically not required by the spec, we're forcing
-                // it to this value.
-                'type'   => 'Enum#application/x-shockwave-flash',
-                'width'  => 'Pixels#' . $max,
-                'height' => 'Pixels#' . $max,
-                'data'   => 'URI#embedded'
-            )
-        );
-        $object->attr_transform_post[] = new HTMLPurifier_AttrTransform_SafeObject();
-
-        $param = $this->addElement('param', false, 'Empty', false,
-            array(
-                'id' => 'ID',
-                'name*' => 'Text',
-                'value' => 'Text'
-            )
-        );
-        $param->attr_transform_post[] = new HTMLPurifier_AttrTransform_SafeParam();
-        $this->info_injector[] = 'SafeObject';
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Scripting.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Scripting.php
deleted file mode 100644
index cecdea6c30..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Scripting.php
+++ /dev/null
@@ -1,54 +0,0 @@
-<?php
-
-/*
-
-WARNING: THIS MODULE IS EXTREMELY DANGEROUS AS IT ENABLES INLINE SCRIPTING
-INSIDE HTML PURIFIER DOCUMENTS. USE ONLY WITH TRUSTED USER INPUT!!!
-
-*/
-
-/**
- * XHTML 1.1 Scripting module, defines elements that are used to contain
- * information pertaining to executable scripts or the lack of support
- * for executable scripts.
- * @note This module does not contain inline scripting elements
- */
-class HTMLPurifier_HTMLModule_Scripting extends HTMLPurifier_HTMLModule
-{
-    public $name = 'Scripting';
-    public $elements = array('script', 'noscript');
-    public $content_sets = array('Block' => 'script | noscript', 'Inline' => 'script | noscript');
-    public $safe = false;
-
-    public function setup($config) {
-        // TODO: create custom child-definition for noscript that
-        // auto-wraps stray #PCDATA in a similar manner to
-        // blockquote's custom definition (we would use it but
-        // blockquote's contents are optional while noscript's contents
-        // are required)
-
-        // TODO: convert this to new syntax, main problem is getting
-        // both content sets working
-
-        // In theory, this could be safe, but I don't see any reason to
-        // allow it.
-        $this->info['noscript'] = new HTMLPurifier_ElementDef();
-        $this->info['noscript']->attr = array( 0 => array('Common') );
-        $this->info['noscript']->content_model = 'Heading | List | Block';
-        $this->info['noscript']->content_model_type = 'required';
-
-        $this->info['script'] = new HTMLPurifier_ElementDef();
-        $this->info['script']->attr = array(
-            'defer' => new HTMLPurifier_AttrDef_Enum(array('defer')),
-            'src'   => new HTMLPurifier_AttrDef_URI(true),
-            'type'  => new HTMLPurifier_AttrDef_Enum(array('text/javascript'))
-        );
-        $this->info['script']->content_model = '#PCDATA';
-        $this->info['script']->content_model_type = 'optional';
-        $this->info['script']->attr_transform_pre['type'] =
-        $this->info['script']->attr_transform_post['type'] =
-            new HTMLPurifier_AttrTransform_ScriptRequired();
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/StyleAttribute.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/StyleAttribute.php
deleted file mode 100644
index eb78464cc0..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/StyleAttribute.php
+++ /dev/null
@@ -1,24 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Edit Module, defines editing-related elements. Text Extension
- * Module.
- */
-class HTMLPurifier_HTMLModule_StyleAttribute extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'StyleAttribute';
-    public $attr_collections = array(
-        // The inclusion routine differs from the Abstract Modules but
-        // is in line with the DTD and XML Schemas.
-        'Style' => array('style' => false), // see constructor
-        'Core' => array(0 => array('Style'))
-    );
-
-    public function setup($config) {
-        $this->attr_collections['Style']['style'] = new HTMLPurifier_AttrDef_CSS();
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tables.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tables.php
deleted file mode 100644
index f314ced3f8..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tables.php
+++ /dev/null
@@ -1,66 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Tables Module, fully defines accessible table elements.
- */
-class HTMLPurifier_HTMLModule_Tables extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'Tables';
-
-    public function setup($config) {
-
-        $this->addElement('caption', false, 'Inline', 'Common');
-
-        $this->addElement('table', 'Block',
-            new HTMLPurifier_ChildDef_Table(),  'Common',
-            array(
-                'border' => 'Pixels',
-                'cellpadding' => 'Length',
-                'cellspacing' => 'Length',
-                'frame' => 'Enum#void,above,below,hsides,lhs,rhs,vsides,box,border',
-                'rules' => 'Enum#none,groups,rows,cols,all',
-                'summary' => 'Text',
-                'width' => 'Length'
-            )
-        );
-
-        // common attributes
-        $cell_align = array(
-            'align' => 'Enum#left,center,right,justify,char',
-            'charoff' => 'Length',
-            'valign' => 'Enum#top,middle,bottom,baseline',
-        );
-
-        $cell_t = array_merge(
-            array(
-                'abbr'    => 'Text',
-                'colspan' => 'Number',
-                'rowspan' => 'Number',
-            ),
-            $cell_align
-        );
-        $this->addElement('td', false, 'Flow', 'Common', $cell_t);
-        $this->addElement('th', false, 'Flow', 'Common', $cell_t);
-
-        $this->addElement('tr', false, 'Required: td | th', 'Common', $cell_align);
-
-        $cell_col = array_merge(
-            array(
-                'span'  => 'Number',
-                'width' => 'MultiLength',
-            ),
-            $cell_align
-        );
-        $this->addElement('col',      false, 'Empty',         'Common', $cell_col);
-        $this->addElement('colgroup', false, 'Optional: col', 'Common', $cell_col);
-
-        $this->addElement('tbody', false, 'Required: tr', 'Common', $cell_align);
-        $this->addElement('thead', false, 'Required: tr', 'Common', $cell_align);
-        $this->addElement('tfoot', false, 'Required: tr', 'Common', $cell_align);
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Target.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Target.php
deleted file mode 100644
index 2b844ecc45..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Target.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Target Module, defines target attribute in link elements.
- */
-class HTMLPurifier_HTMLModule_Target extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'Target';
-
-    public function setup($config) {
-        $elements = array('a');
-        foreach ($elements as $name) {
-            $e = $this->addBlankElement($name);
-            $e->attr = array(
-                'target' => new HTMLPurifier_AttrDef_HTML_FrameTarget()
-            );
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Text.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Text.php
deleted file mode 100644
index ae77c71886..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Text.php
+++ /dev/null
@@ -1,71 +0,0 @@
-<?php
-
-/**
- * XHTML 1.1 Text Module, defines basic text containers. Core Module.
- * @note In the normative XML Schema specification, this module
- *       is further abstracted into the following modules:
- *          - Block Phrasal (address, blockquote, pre, h1, h2, h3, h4, h5, h6)
- *          - Block Structural (div, p)
- *          - Inline Phrasal (abbr, acronym, cite, code, dfn, em, kbd, q, samp, strong, var)
- *          - Inline Structural (br, span)
- *       This module, functionally, does not distinguish between these
- *       sub-modules, but the code is internally structured to reflect
- *       these distinctions.
- */
-class HTMLPurifier_HTMLModule_Text extends HTMLPurifier_HTMLModule
-{
-
-    public $name = 'Text';
-    public $content_sets = array(
-        'Flow' => 'Heading | Block | Inline'
-    );
-
-    public function setup($config) {
-
-        // Inline Phrasal -------------------------------------------------
-        $this->addElement('abbr',    'Inline', 'Inline', 'Common');
-        $this->addElement('acronym', 'Inline', 'Inline', 'Common');
-        $this->addElement('cite',    'Inline', 'Inline', 'Common');
-        $this->addElement('dfn',     'Inline', 'Inline', 'Common');
-        $this->addElement('kbd',     'Inline', 'Inline', 'Common');
-        $this->addElement('q',       'Inline', 'Inline', 'Common', array('cite' => 'URI'));
-        $this->addElement('samp',    'Inline', 'Inline', 'Common');
-        $this->addElement('var',     'Inline', 'Inline', 'Common');
-
-        $em = $this->addElement('em',      'Inline', 'Inline', 'Common');
-        $em->formatting = true;
-
-        $strong = $this->addElement('strong',  'Inline', 'Inline', 'Common');
-        $strong->formatting = true;
-
-        $code = $this->addElement('code',    'Inline', 'Inline', 'Common');
-        $code->formatting = true;
-
-        // Inline Structural ----------------------------------------------
-        $this->addElement('span', 'Inline', 'Inline', 'Common');
-        $this->addElement('br',   'Inline', 'Empty',  'Core');
-
-        // Block Phrasal --------------------------------------------------
-        $this->addElement('address',     'Block', 'Inline', 'Common');
-        $this->addElement('blockquote',  'Block', 'Optional: Heading | Block | List', 'Common', array('cite' => 'URI') );
-        $pre = $this->addElement('pre', 'Block', 'Inline', 'Common');
-        $pre->excludes = $this->makeLookup(
-            'img', 'big', 'small', 'object', 'applet', 'font', 'basefont' );
-        $this->addElement('h1', 'Heading', 'Inline', 'Common');
-        $this->addElement('h2', 'Heading', 'Inline', 'Common');
-        $this->addElement('h3', 'Heading', 'Inline', 'Common');
-        $this->addElement('h4', 'Heading', 'Inline', 'Common');
-        $this->addElement('h5', 'Heading', 'Inline', 'Common');
-        $this->addElement('h6', 'Heading', 'Inline', 'Common');
-
-        // Block Structural -----------------------------------------------
-        $p = $this->addElement('p', 'Block', 'Inline', 'Common');
-        $p->autoclose = array_flip(array("address", "blockquote", "center", "dir", "div", "dl", "fieldset", "ol", "p", "ul"));
-
-        $this->addElement('div', 'Block', 'Flow', 'Common');
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy.php
deleted file mode 100644
index 21783f18eb..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy.php
+++ /dev/null
@@ -1,207 +0,0 @@
-<?php
-
-/**
- * Abstract class for a set of proprietary modules that clean up (tidy)
- * poorly written HTML.
- * @todo Figure out how to protect some of these methods/properties
- */
-class HTMLPurifier_HTMLModule_Tidy extends HTMLPurifier_HTMLModule
-{
-
-    /**
-     * List of supported levels. Index zero is a special case "no fixes"
-     * level.
-     */
-    public $levels = array(0 => 'none', 'light', 'medium', 'heavy');
-
-    /**
-     * Default level to place all fixes in. Disabled by default
-     */
-    public $defaultLevel = null;
-
-    /**
-     * Lists of fixes used by getFixesForLevel(). Format is:
-     *      HTMLModule_Tidy->fixesForLevel[$level] = array('fix-1', 'fix-2');
-     */
-    public $fixesForLevel = array(
-        'light'  => array(),
-        'medium' => array(),
-        'heavy'  => array()
-    );
-
-    /**
-     * Lazy load constructs the module by determining the necessary
-     * fixes to create and then delegating to the populate() function.
-     * @todo Wildcard matching and error reporting when an added or
-     *       subtracted fix has no effect.
-     */
-    public function setup($config) {
-
-        // create fixes, initialize fixesForLevel
-        $fixes = $this->makeFixes();
-        $this->makeFixesForLevel($fixes);
-
-        // figure out which fixes to use
-        $level = $config->get('HTML.TidyLevel');
-        $fixes_lookup = $this->getFixesForLevel($level);
-
-        // get custom fix declarations: these need namespace processing
-        $add_fixes    = $config->get('HTML.TidyAdd');
-        $remove_fixes = $config->get('HTML.TidyRemove');
-
-        foreach ($fixes as $name => $fix) {
-            // needs to be refactored a little to implement globbing
-            if (
-                isset($remove_fixes[$name]) ||
-                (!isset($add_fixes[$name]) && !isset($fixes_lookup[$name]))
-            ) {
-                unset($fixes[$name]);
-            }
-        }
-
-        // populate this module with necessary fixes
-        $this->populate($fixes);
-
-    }
-
-    /**
-     * Retrieves all fixes per a level, returning fixes for that specific
-     * level as well as all levels below it.
-     * @param $level String level identifier, see $levels for valid values
-     * @return Lookup up table of fixes
-     */
-    public function getFixesForLevel($level) {
-        if ($level == $this->levels[0]) {
-            return array();
-        }
-        $activated_levels = array();
-        for ($i = 1, $c = count($this->levels); $i < $c; $i++) {
-            $activated_levels[] = $this->levels[$i];
-            if ($this->levels[$i] == $level) break;
-        }
-        if ($i == $c) {
-            trigger_error(
-                'Tidy level ' . htmlspecialchars($level) . ' not recognized',
-                E_USER_WARNING
-            );
-            return array();
-        }
-        $ret = array();
-        foreach ($activated_levels as $level) {
-            foreach ($this->fixesForLevel[$level] as $fix) {
-                $ret[$fix] = true;
-            }
-        }
-        return $ret;
-    }
-
-    /**
-     * Dynamically populates the $fixesForLevel member variable using
-     * the fixes array. It may be custom overloaded, used in conjunction
-     * with $defaultLevel, or not used at all.
-     */
-    public function makeFixesForLevel($fixes) {
-        if (!isset($this->defaultLevel)) return;
-        if (!isset($this->fixesForLevel[$this->defaultLevel])) {
-            trigger_error(
-                'Default level ' . $this->defaultLevel . ' does not exist',
-                E_USER_ERROR
-            );
-            return;
-        }
-        $this->fixesForLevel[$this->defaultLevel] = array_keys($fixes);
-    }
-
-    /**
-     * Populates the module with transforms and other special-case code
-     * based on a list of fixes passed to it
-     * @param $lookup Lookup table of fixes to activate
-     */
-    public function populate($fixes) {
-        foreach ($fixes as $name => $fix) {
-            // determine what the fix is for
-            list($type, $params) = $this->getFixType($name);
-            switch ($type) {
-                case 'attr_transform_pre':
-                case 'attr_transform_post':
-                    $attr = $params['attr'];
-                    if (isset($params['element'])) {
-                        $element = $params['element'];
-                        if (empty($this->info[$element])) {
-                            $e = $this->addBlankElement($element);
-                        } else {
-                            $e = $this->info[$element];
-                        }
-                    } else {
-                        $type = "info_$type";
-                        $e = $this;
-                    }
-                    // PHP does some weird parsing when I do
-                    // $e->$type[$attr], so I have to assign a ref.
-                    $f =& $e->$type;
-                    $f[$attr] = $fix;
-                    break;
-                case 'tag_transform':
-                    $this->info_tag_transform[$params['element']] = $fix;
-                    break;
-                case 'child':
-                case 'content_model_type':
-                    $element = $params['element'];
-                    if (empty($this->info[$element])) {
-                        $e = $this->addBlankElement($element);
-                    } else {
-                        $e = $this->info[$element];
-                    }
-                    $e->$type = $fix;
-                    break;
-                default:
-                    trigger_error("Fix type $type not supported", E_USER_ERROR);
-                    break;
-            }
-        }
-    }
-
-    /**
-     * Parses a fix name and determines what kind of fix it is, as well
-     * as other information defined by the fix
-     * @param $name String name of fix
-     * @return array(string $fix_type, array $fix_parameters)
-     * @note $fix_parameters is type dependant, see populate() for usage
-     *       of these parameters
-     */
-    public function getFixType($name) {
-        // parse it
-        $property = $attr = null;
-        if (strpos($name, '#') !== false) list($name, $property) = explode('#', $name);
-        if (strpos($name, '@') !== false) list($name, $attr)     = explode('@', $name);
-
-        // figure out the parameters
-        $params = array();
-        if ($name !== '')    $params['element'] = $name;
-        if (!is_null($attr)) $params['attr'] = $attr;
-
-        // special case: attribute transform
-        if (!is_null($attr)) {
-            if (is_null($property)) $property = 'pre';
-            $type = 'attr_transform_' . $property;
-            return array($type, $params);
-        }
-
-        // special case: tag transform
-        if (is_null($property)) {
-            return array('tag_transform', $params);
-        }
-
-        return array($property, $params);
-
-    }
-
-    /**
-     * Defines all fixes the module will perform in a compact
-     * associative array of fix name to fix implementation.
-     */
-    public function makeFixes() {}
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/Name.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/Name.php
deleted file mode 100644
index 61ff85ce2f..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/Name.php
+++ /dev/null
@@ -1,24 +0,0 @@
-<?php
-
-/**
- * Name is deprecated, but allowed in strict doctypes, so onl
- */
-class HTMLPurifier_HTMLModule_Tidy_Name extends HTMLPurifier_HTMLModule_Tidy
-{
-    public $name = 'Tidy_Name';
-    public $defaultLevel = 'heavy';
-    public function makeFixes() {
-
-        $r = array();
-
-        // @name for img, a -----------------------------------------------
-        // Technically, it's allowed even on strict, so we allow authors to use
-        // it. However, it's deprecated in future versions of XHTML.
-        $r['img@name'] =
-        $r['a@name'] = new HTMLPurifier_AttrTransform_Name();
-
-        return $r;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/Proprietary.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/Proprietary.php
deleted file mode 100644
index 85fa90a942..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/Proprietary.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-class HTMLPurifier_HTMLModule_Tidy_Proprietary extends HTMLPurifier_HTMLModule_Tidy
-{
-
-    public $name = 'Tidy_Proprietary';
-    public $defaultLevel = 'light';
-
-    public function makeFixes() {
-        $r = array();
-        $r['table@background'] = new HTMLPurifier_AttrTransform_Background();
-        $r['td@background']    = new HTMLPurifier_AttrTransform_Background();
-        $r['th@background']    = new HTMLPurifier_AttrTransform_Background();
-        $r['tr@background']    = new HTMLPurifier_AttrTransform_Background();
-        $r['thead@background'] = new HTMLPurifier_AttrTransform_Background();
-        $r['tfoot@background'] = new HTMLPurifier_AttrTransform_Background();
-        $r['tbody@background'] = new HTMLPurifier_AttrTransform_Background();
-        return $r;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/Strict.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/Strict.php
deleted file mode 100644
index c73dc3c4d1..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/Strict.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-class HTMLPurifier_HTMLModule_Tidy_Strict extends HTMLPurifier_HTMLModule_Tidy_XHTMLAndHTML4
-{
-    public $name = 'Tidy_Strict';
-    public $defaultLevel = 'light';
-
-    public function makeFixes() {
-        $r = parent::makeFixes();
-        $r['blockquote#content_model_type'] = 'strictblockquote';
-        return $r;
-    }
-
-    public $defines_child_def = true;
-    public function getChildDef($def) {
-        if ($def->content_model_type != 'strictblockquote') return parent::getChildDef($def);
-        return new HTMLPurifier_ChildDef_StrictBlockquote($def->content_model);
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/Transitional.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/Transitional.php
deleted file mode 100644
index 9960b1dd10..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/Transitional.php
+++ /dev/null
@@ -1,9 +0,0 @@
-<?php
-
-class HTMLPurifier_HTMLModule_Tidy_Transitional extends HTMLPurifier_HTMLModule_Tidy_XHTMLAndHTML4
-{
-    public $name = 'Tidy_Transitional';
-    public $defaultLevel = 'heavy';
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/XHTML.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/XHTML.php
deleted file mode 100644
index db5a378e53..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/XHTML.php
+++ /dev/null
@@ -1,17 +0,0 @@
-<?php
-
-class HTMLPurifier_HTMLModule_Tidy_XHTML extends HTMLPurifier_HTMLModule_Tidy
-{
-
-    public $name = 'Tidy_XHTML';
-    public $defaultLevel = 'medium';
-
-    public function makeFixes() {
-        $r = array();
-        $r['@lang'] = new HTMLPurifier_AttrTransform_Lang();
-        return $r;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php
deleted file mode 100644
index 02e9438139..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php
+++ /dev/null
@@ -1,161 +0,0 @@
-<?php
-
-class HTMLPurifier_HTMLModule_Tidy_XHTMLAndHTML4 extends HTMLPurifier_HTMLModule_Tidy
-{
-
-    public function makeFixes() {
-
-        $r = array();
-
-        // == deprecated tag transforms ===================================
-
-        $r['font']   = new HTMLPurifier_TagTransform_Font();
-        $r['menu']   = new HTMLPurifier_TagTransform_Simple('ul');
-        $r['dir']    = new HTMLPurifier_TagTransform_Simple('ul');
-        $r['center'] = new HTMLPurifier_TagTransform_Simple('div',  'text-align:center;');
-        $r['u']      = new HTMLPurifier_TagTransform_Simple('span', 'text-decoration:underline;');
-        $r['s']      = new HTMLPurifier_TagTransform_Simple('span', 'text-decoration:line-through;');
-        $r['strike'] = new HTMLPurifier_TagTransform_Simple('span', 'text-decoration:line-through;');
-
-        // == deprecated attribute transforms =============================
-
-        $r['caption@align'] =
-            new HTMLPurifier_AttrTransform_EnumToCSS('align', array(
-                // we're following IE's behavior, not Firefox's, due
-                // to the fact that no one supports caption-side:right,
-                // W3C included (with CSS 2.1). This is a slightly
-                // unreasonable attribute!
-                'left'   => 'text-align:left;',
-                'right'  => 'text-align:right;',
-                'top'    => 'caption-side:top;',
-                'bottom' => 'caption-side:bottom;' // not supported by IE
-            ));
-
-        // @align for img -------------------------------------------------
-        $r['img@align'] =
-            new HTMLPurifier_AttrTransform_EnumToCSS('align', array(
-                'left'   => 'float:left;',
-                'right'  => 'float:right;',
-                'top'    => 'vertical-align:top;',
-                'middle' => 'vertical-align:middle;',
-                'bottom' => 'vertical-align:baseline;',
-            ));
-
-        // @align for table -----------------------------------------------
-        $r['table@align'] =
-            new HTMLPurifier_AttrTransform_EnumToCSS('align', array(
-                'left'   => 'float:left;',
-                'center' => 'margin-left:auto;margin-right:auto;',
-                'right'  => 'float:right;'
-            ));
-
-        // @align for hr -----------------------------------------------
-        $r['hr@align'] =
-            new HTMLPurifier_AttrTransform_EnumToCSS('align', array(
-                // we use both text-align and margin because these work
-                // for different browsers (IE and Firefox, respectively)
-                // and the melange makes for a pretty cross-compatible
-                // solution
-                'left'   => 'margin-left:0;margin-right:auto;text-align:left;',
-                'center' => 'margin-left:auto;margin-right:auto;text-align:center;',
-                'right'  => 'margin-left:auto;margin-right:0;text-align:right;'
-            ));
-
-        // @align for h1, h2, h3, h4, h5, h6, p, div ----------------------
-        // {{{
-            $align_lookup = array();
-            $align_values = array('left', 'right', 'center', 'justify');
-            foreach ($align_values as $v) $align_lookup[$v] = "text-align:$v;";
-        // }}}
-        $r['h1@align'] =
-        $r['h2@align'] =
-        $r['h3@align'] =
-        $r['h4@align'] =
-        $r['h5@align'] =
-        $r['h6@align'] =
-        $r['p@align']  =
-        $r['div@align'] =
-            new HTMLPurifier_AttrTransform_EnumToCSS('align', $align_lookup);
-
-        // @bgcolor for table, tr, td, th ---------------------------------
-        $r['table@bgcolor'] =
-        $r['td@bgcolor'] =
-        $r['th@bgcolor'] =
-            new HTMLPurifier_AttrTransform_BgColor();
-
-        // @border for img ------------------------------------------------
-        $r['img@border'] = new HTMLPurifier_AttrTransform_Border();
-
-        // @clear for br --------------------------------------------------
-        $r['br@clear'] =
-            new HTMLPurifier_AttrTransform_EnumToCSS('clear', array(
-                'left'  => 'clear:left;',
-                'right' => 'clear:right;',
-                'all'   => 'clear:both;',
-                'none'  => 'clear:none;',
-            ));
-
-        // @height for td, th ---------------------------------------------
-        $r['td@height'] =
-        $r['th@height'] =
-            new HTMLPurifier_AttrTransform_Length('height');
-
-        // @hspace for img ------------------------------------------------
-        $r['img@hspace'] = new HTMLPurifier_AttrTransform_ImgSpace('hspace');
-
-        // @noshade for hr ------------------------------------------------
-        // this transformation is not precise but often good enough.
-        // different browsers use different styles to designate noshade
-        $r['hr@noshade'] =
-            new HTMLPurifier_AttrTransform_BoolToCSS(
-                'noshade',
-                'color:#808080;background-color:#808080;border:0;'
-            );
-
-        // @nowrap for td, th ---------------------------------------------
-        $r['td@nowrap'] =
-        $r['th@nowrap'] =
-            new HTMLPurifier_AttrTransform_BoolToCSS(
-                'nowrap',
-                'white-space:nowrap;'
-            );
-
-        // @size for hr  --------------------------------------------------
-        $r['hr@size'] = new HTMLPurifier_AttrTransform_Length('size', 'height');
-
-        // @type for li, ol, ul -------------------------------------------
-        // {{{
-            $ul_types = array(
-                'disc'   => 'list-style-type:disc;',
-                'square' => 'list-style-type:square;',
-                'circle' => 'list-style-type:circle;'
-            );
-            $ol_types = array(
-                '1'   => 'list-style-type:decimal;',
-                'i'   => 'list-style-type:lower-roman;',
-                'I'   => 'list-style-type:upper-roman;',
-                'a'   => 'list-style-type:lower-alpha;',
-                'A'   => 'list-style-type:upper-alpha;'
-            );
-            $li_types = $ul_types + $ol_types;
-        // }}}
-
-        $r['ul@type'] = new HTMLPurifier_AttrTransform_EnumToCSS('type', $ul_types);
-        $r['ol@type'] = new HTMLPurifier_AttrTransform_EnumToCSS('type', $ol_types, true);
-        $r['li@type'] = new HTMLPurifier_AttrTransform_EnumToCSS('type', $li_types, true);
-
-        // @vspace for img ------------------------------------------------
-        $r['img@vspace'] = new HTMLPurifier_AttrTransform_ImgSpace('vspace');
-
-        // @width for hr, td, th ------------------------------------------
-        $r['td@width'] =
-        $r['th@width'] =
-        $r['hr@width'] = new HTMLPurifier_AttrTransform_Length('width');
-
-        return $r;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/XMLCommonAttributes.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/XMLCommonAttributes.php
deleted file mode 100644
index 9c0e031984..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModule/XMLCommonAttributes.php
+++ /dev/null
@@ -1,14 +0,0 @@
-<?php
-
-class HTMLPurifier_HTMLModule_XMLCommonAttributes extends HTMLPurifier_HTMLModule
-{
-    public $name = 'XMLCommonAttributes';
-
-    public $attr_collections = array(
-        'Lang' => array(
-            'xml:lang' => 'LanguageCode',
-        )
-    );
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/HTMLModuleManager.php b/extlib/HTMLPurifier/HTMLPurifier/HTMLModuleManager.php
deleted file mode 100644
index f5c4a1d2cb..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/HTMLModuleManager.php
+++ /dev/null
@@ -1,403 +0,0 @@
-<?php
-
-class HTMLPurifier_HTMLModuleManager
-{
-
-    /**
-     * Instance of HTMLPurifier_DoctypeRegistry
-     */
-    public $doctypes;
-
-    /**
-     * Instance of current doctype
-     */
-    public $doctype;
-
-    /**
-     * Instance of HTMLPurifier_AttrTypes
-     */
-    public $attrTypes;
-
-    /**
-     * Active instances of modules for the specified doctype are
-     * indexed, by name, in this array.
-     */
-    public $modules = array();
-
-    /**
-     * Array of recognized HTMLPurifier_Module instances, indexed by
-     * module's class name. This array is usually lazy loaded, but a
-     * user can overload a module by pre-emptively registering it.
-     */
-    public $registeredModules = array();
-
-    /**
-     * List of extra modules that were added by the user using addModule().
-     * These get unconditionally merged into the current doctype, whatever
-     * it may be.
-     */
-    public $userModules = array();
-
-    /**
-     * Associative array of element name to list of modules that have
-     * definitions for the element; this array is dynamically filled.
-     */
-    public $elementLookup = array();
-
-    /** List of prefixes we should use for registering small names */
-    public $prefixes = array('HTMLPurifier_HTMLModule_');
-
-    public $contentSets;     /**< Instance of HTMLPurifier_ContentSets */
-    public $attrCollections; /**< Instance of HTMLPurifier_AttrCollections */
-
-    /** If set to true, unsafe elements and attributes will be allowed */
-    public $trusted = false;
-
-    public function __construct() {
-
-        // editable internal objects
-        $this->attrTypes = new HTMLPurifier_AttrTypes();
-        $this->doctypes  = new HTMLPurifier_DoctypeRegistry();
-
-        // setup basic modules
-        $common = array(
-            'CommonAttributes', 'Text', 'Hypertext', 'List',
-            'Presentation', 'Edit', 'Bdo', 'Tables', 'Image',
-            'StyleAttribute',
-            // Unsafe:
-            'Scripting', 'Object',  'Forms',
-            // Sorta legacy, but present in strict:
-            'Name',
-        );
-        $transitional = array('Legacy', 'Target');
-        $xml = array('XMLCommonAttributes');
-        $non_xml = array('NonXMLCommonAttributes');
-
-        // setup basic doctypes
-        $this->doctypes->register(
-            'HTML 4.01 Transitional', false,
-            array_merge($common, $transitional, $non_xml),
-            array('Tidy_Transitional', 'Tidy_Proprietary'),
-            array(),
-            '-//W3C//DTD HTML 4.01 Transitional//EN',
-            'http://www.w3.org/TR/html4/loose.dtd'
-        );
-
-        $this->doctypes->register(
-            'HTML 4.01 Strict', false,
-            array_merge($common, $non_xml),
-            array('Tidy_Strict', 'Tidy_Proprietary', 'Tidy_Name'),
-            array(),
-            '-//W3C//DTD HTML 4.01//EN',
-            'http://www.w3.org/TR/html4/strict.dtd'
-        );
-
-        $this->doctypes->register(
-            'XHTML 1.0 Transitional', true,
-            array_merge($common, $transitional, $xml, $non_xml),
-            array('Tidy_Transitional', 'Tidy_XHTML', 'Tidy_Proprietary', 'Tidy_Name'),
-            array(),
-            '-//W3C//DTD XHTML 1.0 Transitional//EN',
-            'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'
-        );
-
-        $this->doctypes->register(
-            'XHTML 1.0 Strict', true,
-            array_merge($common, $xml, $non_xml),
-            array('Tidy_Strict', 'Tidy_XHTML', 'Tidy_Strict', 'Tidy_Proprietary', 'Tidy_Name'),
-            array(),
-            '-//W3C//DTD XHTML 1.0 Strict//EN',
-            'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd'
-        );
-
-        $this->doctypes->register(
-            'XHTML 1.1', true,
-            array_merge($common, $xml, array('Ruby')),
-            array('Tidy_Strict', 'Tidy_XHTML', 'Tidy_Proprietary', 'Tidy_Strict', 'Tidy_Name'), // Tidy_XHTML1_1
-            array(),
-            '-//W3C//DTD XHTML 1.1//EN',
-            'http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd'
-        );
-
-    }
-
-    /**
-     * Registers a module to the recognized module list, useful for
-     * overloading pre-existing modules.
-     * @param $module Mixed: string module name, with or without
-     *                HTMLPurifier_HTMLModule prefix, or instance of
-     *                subclass of HTMLPurifier_HTMLModule.
-     * @param $overload Boolean whether or not to overload previous modules.
-     *                  If this is not set, and you do overload a module,
-     *                  HTML Purifier will complain with a warning.
-     * @note This function will not call autoload, you must instantiate
-     *       (and thus invoke) autoload outside the method.
-     * @note If a string is passed as a module name, different variants
-     *       will be tested in this order:
-     *          - Check for HTMLPurifier_HTMLModule_$name
-     *          - Check all prefixes with $name in order they were added
-     *          - Check for literal object name
-     *          - Throw fatal error
-     *       If your object name collides with an internal class, specify
-     *       your module manually. All modules must have been included
-     *       externally: registerModule will not perform inclusions for you!
-     */
-    public function registerModule($module, $overload = false) {
-        if (is_string($module)) {
-            // attempt to load the module
-            $original_module = $module;
-            $ok = false;
-            foreach ($this->prefixes as $prefix) {
-                $module = $prefix . $original_module;
-                if (class_exists($module)) {
-                    $ok = true;
-                    break;
-                }
-            }
-            if (!$ok) {
-                $module = $original_module;
-                if (!class_exists($module)) {
-                    trigger_error($original_module . ' module does not exist',
-                        E_USER_ERROR);
-                    return;
-                }
-            }
-            $module = new $module();
-        }
-        if (empty($module->name)) {
-            trigger_error('Module instance of ' . get_class($module) . ' must have name');
-            return;
-        }
-        if (!$overload && isset($this->registeredModules[$module->name])) {
-            trigger_error('Overloading ' . $module->name . ' without explicit overload parameter', E_USER_WARNING);
-        }
-        $this->registeredModules[$module->name] = $module;
-    }
-
-    /**
-     * Adds a module to the current doctype by first registering it,
-     * and then tacking it on to the active doctype
-     */
-    public function addModule($module) {
-        $this->registerModule($module);
-        if (is_object($module)) $module = $module->name;
-        $this->userModules[] = $module;
-    }
-
-    /**
-     * Adds a class prefix that registerModule() will use to resolve a
-     * string name to a concrete class
-     */
-    public function addPrefix($prefix) {
-        $this->prefixes[] = $prefix;
-    }
-
-    /**
-     * Performs processing on modules, after being called you may
-     * use getElement() and getElements()
-     * @param $config Instance of HTMLPurifier_Config
-     */
-    public function setup($config) {
-
-        $this->trusted = $config->get('HTML.Trusted');
-
-        // generate
-        $this->doctype = $this->doctypes->make($config);
-        $modules = $this->doctype->modules;
-
-        // take out the default modules that aren't allowed
-        $lookup = $config->get('HTML.AllowedModules');
-        $special_cases = $config->get('HTML.CoreModules');
-
-        if (is_array($lookup)) {
-            foreach ($modules as $k => $m) {
-                if (isset($special_cases[$m])) continue;
-                if (!isset($lookup[$m])) unset($modules[$k]);
-            }
-        }
-
-        // add proprietary module (this gets special treatment because
-        // it is completely removed from doctypes, etc.)
-        if ($config->get('HTML.Proprietary')) {
-            $modules[] = 'Proprietary';
-        }
-
-        // add SafeObject/Safeembed modules
-        if ($config->get('HTML.SafeObject')) {
-            $modules[] = 'SafeObject';
-        }
-        if ($config->get('HTML.SafeEmbed')) {
-            $modules[] = 'SafeEmbed';
-        }
-
-        // merge in custom modules
-        $modules = array_merge($modules, $this->userModules);
-
-        foreach ($modules as $module) {
-            $this->processModule($module);
-            $this->modules[$module]->setup($config);
-        }
-
-        foreach ($this->doctype->tidyModules as $module) {
-            $this->processModule($module);
-            $this->modules[$module]->setup($config);
-        }
-
-        // prepare any injectors
-        foreach ($this->modules as $module) {
-            $n = array();
-            foreach ($module->info_injector as $i => $injector) {
-                if (!is_object($injector)) {
-                    $class = "HTMLPurifier_Injector_$injector";
-                    $injector = new $class;
-                }
-                $n[$injector->name] = $injector;
-            }
-            $module->info_injector = $n;
-        }
-
-        // setup lookup table based on all valid modules
-        foreach ($this->modules as $module) {
-            foreach ($module->info as $name => $def) {
-                if (!isset($this->elementLookup[$name])) {
-                    $this->elementLookup[$name] = array();
-                }
-                $this->elementLookup[$name][] = $module->name;
-            }
-        }
-
-        // note the different choice
-        $this->contentSets = new HTMLPurifier_ContentSets(
-            // content set assembly deals with all possible modules,
-            // not just ones deemed to be "safe"
-            $this->modules
-        );
-        $this->attrCollections = new HTMLPurifier_AttrCollections(
-            $this->attrTypes,
-            // there is no way to directly disable a global attribute,
-            // but using AllowedAttributes or simply not including
-            // the module in your custom doctype should be sufficient
-            $this->modules
-        );
-    }
-
-    /**
-     * Takes a module and adds it to the active module collection,
-     * registering it if necessary.
-     */
-    public function processModule($module) {
-        if (!isset($this->registeredModules[$module]) || is_object($module)) {
-            $this->registerModule($module);
-        }
-        $this->modules[$module] = $this->registeredModules[$module];
-    }
-
-    /**
-     * Retrieves merged element definitions.
-     * @return Array of HTMLPurifier_ElementDef
-     */
-    public function getElements() {
-
-        $elements = array();
-        foreach ($this->modules as $module) {
-            if (!$this->trusted && !$module->safe) continue;
-            foreach ($module->info as $name => $v) {
-                if (isset($elements[$name])) continue;
-                $elements[$name] = $this->getElement($name);
-            }
-        }
-
-        // remove dud elements, this happens when an element that
-        // appeared to be safe actually wasn't
-        foreach ($elements as $n => $v) {
-            if ($v === false) unset($elements[$n]);
-        }
-
-        return $elements;
-
-    }
-
-    /**
-     * Retrieves a single merged element definition
-     * @param $name Name of element
-     * @param $trusted Boolean trusted overriding parameter: set to true
-     *                 if you want the full version of an element
-     * @return Merged HTMLPurifier_ElementDef
-     * @note You may notice that modules are getting iterated over twice (once
-     *       in getElements() and once here). This
-     *       is because
-     */
-    public function getElement($name, $trusted = null) {
-
-        if (!isset($this->elementLookup[$name])) {
-            return false;
-        }
-
-        // setup global state variables
-        $def = false;
-        if ($trusted === null) $trusted = $this->trusted;
-
-        // iterate through each module that has registered itself to this
-        // element
-        foreach($this->elementLookup[$name] as $module_name) {
-
-            $module = $this->modules[$module_name];
-
-            // refuse to create/merge from a module that is deemed unsafe--
-            // pretend the module doesn't exist--when trusted mode is not on.
-            if (!$trusted && !$module->safe) {
-                continue;
-            }
-
-            // clone is used because, ideally speaking, the original
-            // definition should not be modified. Usually, this will
-            // make no difference, but for consistency's sake
-            $new_def = clone $module->info[$name];
-
-            if (!$def && $new_def->standalone) {
-                $def = $new_def;
-            } elseif ($def) {
-                // This will occur even if $new_def is standalone. In practice,
-                // this will usually result in a full replacement.
-                $def->mergeIn($new_def);
-            } else {
-                // :TODO:
-                // non-standalone definitions that don't have a standalone
-                // to merge into could be deferred to the end
-                continue;
-            }
-
-            // attribute value expansions
-            $this->attrCollections->performInclusions($def->attr);
-            $this->attrCollections->expandIdentifiers($def->attr, $this->attrTypes);
-
-            // descendants_are_inline, for ChildDef_Chameleon
-            if (is_string($def->content_model) &&
-                strpos($def->content_model, 'Inline') !== false) {
-                if ($name != 'del' && $name != 'ins') {
-                    // this is for you, ins/del
-                    $def->descendants_are_inline = true;
-                }
-            }
-
-            $this->contentSets->generateChildDef($def, $module);
-        }
-
-        // This can occur if there is a blank definition, but no base to
-        // mix it in with
-        if (!$def) return false;
-
-        // add information on required attributes
-        foreach ($def->attr as $attr_name => $attr_def) {
-            if ($attr_def->required) {
-                $def->required_attr[] = $attr_name;
-            }
-        }
-
-        return $def;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/IDAccumulator.php b/extlib/HTMLPurifier/HTMLPurifier/IDAccumulator.php
deleted file mode 100644
index 73215295a5..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/IDAccumulator.php
+++ /dev/null
@@ -1,53 +0,0 @@
-<?php
-
-/**
- * Component of HTMLPurifier_AttrContext that accumulates IDs to prevent dupes
- * @note In Slashdot-speak, dupe means duplicate.
- * @note The default constructor does not accept $config or $context objects:
- *       use must use the static build() factory method to perform initialization.
- */
-class HTMLPurifier_IDAccumulator
-{
-
-    /**
-     * Lookup table of IDs we've accumulated.
-     * @public
-     */
-    public $ids = array();
-
-    /**
-     * Builds an IDAccumulator, also initializing the default blacklist
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return Fully initialized HTMLPurifier_IDAccumulator
-     */
-    public static function build($config, $context) {
-        $id_accumulator = new HTMLPurifier_IDAccumulator();
-        $id_accumulator->load($config->get('Attr.IDBlacklist'));
-        return $id_accumulator;
-    }
-
-    /**
-     * Add an ID to the lookup table.
-     * @param $id ID to be added.
-     * @return Bool status, true if success, false if there's a dupe
-     */
-    public function add($id) {
-        if (isset($this->ids[$id])) return false;
-        return $this->ids[$id] = true;
-    }
-
-    /**
-     * Load a list of IDs into the lookup table
-     * @param $array_of_ids Array of IDs to load
-     * @note This function doesn't care about duplicates
-     */
-    public function load($array_of_ids) {
-        foreach ($array_of_ids as $id) {
-            $this->ids[$id] = true;
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Injector.php b/extlib/HTMLPurifier/HTMLPurifier/Injector.php
deleted file mode 100644
index 5922f81305..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Injector.php
+++ /dev/null
@@ -1,239 +0,0 @@
-<?php
-
-/**
- * Injects tokens into the document while parsing for well-formedness.
- * This enables "formatter-like" functionality such as auto-paragraphing,
- * smiley-ification and linkification to take place.
- *
- * A note on how handlers create changes; this is done by assigning a new
- * value to the $token reference. These values can take a variety of forms and
- * are best described HTMLPurifier_Strategy_MakeWellFormed->processToken()
- * documentation.
- *
- * @todo Allow injectors to request a re-run on their output. This
- *       would help if an operation is recursive.
- */
-abstract class HTMLPurifier_Injector
-{
-
-    /**
-     * Advisory name of injector, this is for friendly error messages
-     */
-    public $name;
-
-    /**
-     * Instance of HTMLPurifier_HTMLDefinition
-     */
-    protected $htmlDefinition;
-
-    /**
-     * Reference to CurrentNesting variable in Context. This is an array
-     * list of tokens that we are currently "inside"
-     */
-    protected $currentNesting;
-
-    /**
-     * Reference to InputTokens variable in Context. This is an array
-     * list of the input tokens that are being processed.
-     */
-    protected $inputTokens;
-
-    /**
-     * Reference to InputIndex variable in Context. This is an integer
-     * array index for $this->inputTokens that indicates what token
-     * is currently being processed.
-     */
-    protected $inputIndex;
-
-    /**
-     * Array of elements and attributes this injector creates and therefore
-     * need to be allowed by the definition. Takes form of
-     * array('element' => array('attr', 'attr2'), 'element2')
-     */
-    public $needed = array();
-
-    /**
-     * Index of inputTokens to rewind to.
-     */
-    protected $rewind = false;
-
-    /**
-     * Rewind to a spot to re-perform processing. This is useful if you
-     * deleted a node, and now need to see if this change affected any
-     * earlier nodes. Rewinding does not affect other injectors, and can
-     * result in infinite loops if not used carefully.
-     * @warning HTML Purifier will prevent you from fast-forwarding with this
-     *          function.
-     */
-    public function rewind($index) {
-        $this->rewind = $index;
-    }
-
-    /**
-     * Retrieves rewind, and then unsets it.
-     */
-    public function getRewind() {
-        $r = $this->rewind;
-        $this->rewind = false;
-        return $r;
-    }
-
-    /**
-     * Prepares the injector by giving it the config and context objects:
-     * this allows references to important variables to be made within
-     * the injector. This function also checks if the HTML environment
-     * will work with the Injector (see checkNeeded()).
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return Boolean false if success, string of missing needed element/attribute if failure
-     */
-    public function prepare($config, $context) {
-        $this->htmlDefinition = $config->getHTMLDefinition();
-        // Even though this might fail, some unit tests ignore this and
-        // still test checkNeeded, so be careful. Maybe get rid of that
-        // dependency.
-        $result = $this->checkNeeded($config);
-        if ($result !== false) return $result;
-        $this->currentNesting =& $context->get('CurrentNesting');
-        $this->inputTokens    =& $context->get('InputTokens');
-        $this->inputIndex     =& $context->get('InputIndex');
-        return false;
-    }
-
-    /**
-     * This function checks if the HTML environment
-     * will work with the Injector: if p tags are not allowed, the
-     * Auto-Paragraphing injector should not be enabled.
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return Boolean false if success, string of missing needed element/attribute if failure
-     */
-    public function checkNeeded($config) {
-        $def = $config->getHTMLDefinition();
-        foreach ($this->needed as $element => $attributes) {
-            if (is_int($element)) $element = $attributes;
-            if (!isset($def->info[$element])) return $element;
-            if (!is_array($attributes)) continue;
-            foreach ($attributes as $name) {
-                if (!isset($def->info[$element]->attr[$name])) return "$element.$name";
-            }
-        }
-        return false;
-    }
-
-    /**
-     * Tests if the context node allows a certain element
-     * @param $name Name of element to test for
-     * @return True if element is allowed, false if it is not
-     */
-    public function allowsElement($name) {
-        if (!empty($this->currentNesting)) {
-            $parent_token = array_pop($this->currentNesting);
-            $this->currentNesting[] = $parent_token;
-            $parent = $this->htmlDefinition->info[$parent_token->name];
-        } else {
-            $parent = $this->htmlDefinition->info_parent_def;
-        }
-        if (!isset($parent->child->elements[$name]) || isset($parent->excludes[$name])) {
-            return false;
-        }
-        // check for exclusion
-        for ($i = count($this->currentNesting) - 2; $i >= 0; $i--) {
-            $node = $this->currentNesting[$i];
-            $def  = $this->htmlDefinition->info[$node->name];
-            if (isset($def->excludes[$name])) return false;
-        }
-        return true;
-    }
-
-    /**
-     * Iterator function, which starts with the next token and continues until
-     * you reach the end of the input tokens.
-     * @warning Please prevent previous references from interfering with this
-     *          functions by setting $i = null beforehand!
-     * @param &$i Current integer index variable for inputTokens
-     * @param &$current Current token variable. Do NOT use $token, as that variable is also a reference
-     */
-    protected function forward(&$i, &$current) {
-        if ($i === null) $i = $this->inputIndex + 1;
-        else $i++;
-        if (!isset($this->inputTokens[$i])) return false;
-        $current = $this->inputTokens[$i];
-        return true;
-    }
-
-    /**
-     * Similar to _forward, but accepts a third parameter $nesting (which
-     * should be initialized at 0) and stops when we hit the end tag
-     * for the node $this->inputIndex starts in.
-     */
-    protected function forwardUntilEndToken(&$i, &$current, &$nesting) {
-        $result = $this->forward($i, $current);
-        if (!$result) return false;
-        if ($nesting === null) $nesting = 0;
-        if     ($current instanceof HTMLPurifier_Token_Start) $nesting++;
-        elseif ($current instanceof HTMLPurifier_Token_End) {
-            if ($nesting <= 0) return false;
-            $nesting--;
-        }
-        return true;
-    }
-
-    /**
-     * Iterator function, starts with the previous token and continues until
-     * you reach the beginning of input tokens.
-     * @warning Please prevent previous references from interfering with this
-     *          functions by setting $i = null beforehand!
-     * @param &$i Current integer index variable for inputTokens
-     * @param &$current Current token variable. Do NOT use $token, as that variable is also a reference
-     */
-    protected function backward(&$i, &$current) {
-        if ($i === null) $i = $this->inputIndex - 1;
-        else $i--;
-        if ($i < 0) return false;
-        $current = $this->inputTokens[$i];
-        return true;
-    }
-
-    /**
-     * Initializes the iterator at the current position. Use in a do {} while;
-     * loop to force the _forward and _backward functions to start at the
-     * current location.
-     * @warning Please prevent previous references from interfering with this
-     *          functions by setting $i = null beforehand!
-     * @param &$i Current integer index variable for inputTokens
-     * @param &$current Current token variable. Do NOT use $token, as that variable is also a reference
-     */
-    protected function current(&$i, &$current) {
-        if ($i === null) $i = $this->inputIndex;
-        $current = $this->inputTokens[$i];
-    }
-
-    /**
-     * Handler that is called when a text token is processed
-     */
-    public function handleText(&$token) {}
-
-    /**
-     * Handler that is called when a start or empty token is processed
-     */
-    public function handleElement(&$token) {}
-
-    /**
-     * Handler that is called when an end token is processed
-     */
-    public function handleEnd(&$token) {
-        $this->notifyEnd($token);
-    }
-
-    /**
-     * Notifier that is called when an end token is processed
-     * @note This differs from handlers in that the token is read-only
-     * @deprecated
-     */
-    public function notifyEnd($token) {}
-
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Injector/AutoParagraph.php b/extlib/HTMLPurifier/HTMLPurifier/Injector/AutoParagraph.php
deleted file mode 100644
index 8cc952549c..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Injector/AutoParagraph.php
+++ /dev/null
@@ -1,340 +0,0 @@
-<?php
-
-/**
- * Injector that auto paragraphs text in the root node based on
- * double-spacing.
- * @todo Ensure all states are unit tested, including variations as well.
- * @todo Make a graph of the flow control for this Injector.
- */
-class HTMLPurifier_Injector_AutoParagraph extends HTMLPurifier_Injector
-{
-
-    public $name = 'AutoParagraph';
-    public $needed = array('p');
-
-    private function _pStart() {
-        $par = new HTMLPurifier_Token_Start('p');
-        $par->armor['MakeWellFormed_TagClosedError'] = true;
-        return $par;
-    }
-
-    public function handleText(&$token) {
-        $text = $token->data;
-        // Does the current parent allow <p> tags?
-        if ($this->allowsElement('p')) {
-            if (empty($this->currentNesting) || strpos($text, "\n\n") !== false) {
-                // Note that we have differing behavior when dealing with text
-                // in the anonymous root node, or a node inside the document.
-                // If the text as a double-newline, the treatment is the same;
-                // if it doesn't, see the next if-block if you're in the document.
-
-                $i = $nesting = null;
-                if (!$this->forwardUntilEndToken($i, $current, $nesting) && $token->is_whitespace) {
-                    // State 1.1: ...    ^ (whitespace, then document end)
-                    //               ----
-                    // This is a degenerate case
-                } else {
-                    // State 1.2: PAR1
-                    //            ----
-
-                    // State 1.3: PAR1\n\nPAR2
-                    //            ------------
-
-                    // State 1.4: <div>PAR1\n\nPAR2 (see State 2)
-                    //                 ------------
-                    $token = array($this->_pStart());
-                    $this->_splitText($text, $token);
-                }
-            } else {
-                // State 2:   <div>PAR1... (similar to 1.4)
-                //                 ----
-
-                // We're in an element that allows paragraph tags, but we're not
-                // sure if we're going to need them.
-                if ($this->_pLookAhead()) {
-                    // State 2.1: <div>PAR1<b>PAR1\n\nPAR2
-                    //                 ----
-                    // Note: This will always be the first child, since any
-                    // previous inline element would have triggered this very
-                    // same routine, and found the double newline. One possible
-                    // exception would be a comment.
-                    $token = array($this->_pStart(), $token);
-                } else {
-                    // State 2.2.1: <div>PAR1<div>
-                    //                   ----
-
-                    // State 2.2.2: <div>PAR1<b>PAR1</b></div>
-                    //                   ----
-                }
-            }
-        // Is the current parent a <p> tag?
-        } elseif (
-            !empty($this->currentNesting) &&
-            $this->currentNesting[count($this->currentNesting)-1]->name == 'p'
-        ) {
-            // State 3.1: ...<p>PAR1
-            //                  ----
-
-            // State 3.2: ...<p>PAR1\n\nPAR2
-            //                  ------------
-            $token = array();
-            $this->_splitText($text, $token);
-        // Abort!
-        } else {
-            // State 4.1: ...<b>PAR1
-            //                  ----
-
-            // State 4.2: ...<b>PAR1\n\nPAR2
-            //                  ------------
-        }
-    }
-
-    public function handleElement(&$token) {
-        // We don't have to check if we're already in a <p> tag for block
-        // tokens, because the tag would have been autoclosed by MakeWellFormed.
-        if ($this->allowsElement('p')) {
-            if (!empty($this->currentNesting)) {
-                if ($this->_isInline($token)) {
-                    // State 1: <div>...<b>
-                    //                  ---
-
-                    // Check if this token is adjacent to the parent token
-                    // (seek backwards until token isn't whitespace)
-                    $i = null;
-                    $this->backward($i, $prev);
-
-                    if (!$prev instanceof HTMLPurifier_Token_Start) {
-                        // Token wasn't adjacent
-
-                        if (
-                            $prev instanceof HTMLPurifier_Token_Text &&
-                            substr($prev->data, -2) === "\n\n"
-                        ) {
-                            // State 1.1.4: <div><p>PAR1</p>\n\n<b>
-                            //                                  ---
-
-                            // Quite frankly, this should be handled by splitText
-                            $token = array($this->_pStart(), $token);
-                        } else {
-                            // State 1.1.1: <div><p>PAR1</p><b>
-                            //                              ---
-
-                            // State 1.1.2: <div><br /><b>
-                            //                         ---
-
-                            // State 1.1.3: <div>PAR<b>
-                            //                      ---
-                        }
-
-                    } else {
-                        // State 1.2.1: <div><b>
-                        //                   ---
-
-                        // Lookahead to see if <p> is needed.
-                        if ($this->_pLookAhead()) {
-                            // State 1.3.1: <div><b>PAR1\n\nPAR2
-                            //                   ---
-                            $token = array($this->_pStart(), $token);
-                        } else {
-                            // State 1.3.2: <div><b>PAR1</b></div>
-                            //                   ---
-
-                            // State 1.3.3: <div><b>PAR1</b><div></div>\n\n</div>
-                            //                   ---
-                        }
-                    }
-                } else {
-                    // State 2.3: ...<div>
-                    //               -----
-                }
-            } else {
-                if ($this->_isInline($token)) {
-                    // State 3.1: <b>
-                    //            ---
-                    // This is where the {p} tag is inserted, not reflected in
-                    // inputTokens yet, however.
-                    $token = array($this->_pStart(), $token);
-                } else {
-                    // State 3.2: <div>
-                    //            -----
-                }
-
-                $i = null;
-                if ($this->backward($i, $prev)) {
-                    if (
-                        !$prev instanceof HTMLPurifier_Token_Text
-                    ) {
-                        // State 3.1.1: ...</p>{p}<b>
-                        //                        ---
-
-                        // State 3.2.1: ...</p><div>
-                        //                     -----
-
-                        if (!is_array($token)) $token = array($token);
-                        array_unshift($token, new HTMLPurifier_Token_Text("\n\n"));
-                    } else {
-                        // State 3.1.2: ...</p>\n\n{p}<b>
-                        //                            ---
-
-                        // State 3.2.2: ...</p>\n\n<div>
-                        //                         -----
-
-                        // Note: PAR<ELEM> cannot occur because PAR would have been
-                        // wrapped in <p> tags.
-                    }
-                }
-            }
-        } else {
-            // State 2.2: <ul><li>
-            //                ----
-
-            // State 2.4: <p><b>
-            //               ---
-        }
-    }
-
-    /**
-     * Splits up a text in paragraph tokens and appends them
-     * to the result stream that will replace the original
-     * @param $data String text data that will be processed
-     *    into paragraphs
-     * @param $result Reference to array of tokens that the
-     *    tags will be appended onto
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     */
-    private function _splitText($data, &$result) {
-        $raw_paragraphs = explode("\n\n", $data);
-        $paragraphs  = array(); // without empty paragraphs
-        $needs_start = false;
-        $needs_end   = false;
-
-        $c = count($raw_paragraphs);
-        if ($c == 1) {
-            // There were no double-newlines, abort quickly. In theory this
-            // should never happen.
-            $result[] = new HTMLPurifier_Token_Text($data);
-            return;
-        }
-        for ($i = 0; $i < $c; $i++) {
-            $par = $raw_paragraphs[$i];
-            if (trim($par) !== '') {
-                $paragraphs[] = $par;
-            } else {
-                if ($i == 0) {
-                    // Double newline at the front
-                    if (empty($result)) {
-                        // The empty result indicates that the AutoParagraph
-                        // injector did not add any start paragraph tokens.
-                        // This means that we have been in a paragraph for
-                        // a while, and the newline means we should start a new one.
-                        $result[] = new HTMLPurifier_Token_End('p');
-                        $result[] = new HTMLPurifier_Token_Text("\n\n");
-                        // However, the start token should only be added if
-                        // there is more processing to be done (i.e. there are
-                        // real paragraphs in here). If there are none, the
-                        // next start paragraph tag will be handled by the
-                        // next call to the injector
-                        $needs_start = true;
-                    } else {
-                        // We just started a new paragraph!
-                        // Reinstate a double-newline for presentation's sake, since
-                        // it was in the source code.
-                        array_unshift($result, new HTMLPurifier_Token_Text("\n\n"));
-                    }
-                } elseif ($i + 1 == $c) {
-                    // Double newline at the end
-                    // There should be a trailing </p> when we're finally done.
-                    $needs_end = true;
-                }
-            }
-        }
-
-        // Check if this was just a giant blob of whitespace. Move this earlier,
-        // perhaps?
-        if (empty($paragraphs)) {
-            return;
-        }
-
-        // Add the start tag indicated by \n\n at the beginning of $data
-        if ($needs_start) {
-            $result[] = $this->_pStart();
-        }
-
-        // Append the paragraphs onto the result
-        foreach ($paragraphs as $par) {
-            $result[] = new HTMLPurifier_Token_Text($par);
-            $result[] = new HTMLPurifier_Token_End('p');
-            $result[] = new HTMLPurifier_Token_Text("\n\n");
-            $result[] = $this->_pStart();
-        }
-
-        // Remove trailing start token; Injector will handle this later if
-        // it was indeed needed. This prevents from needing to do a lookahead,
-        // at the cost of a lookbehind later.
-        array_pop($result);
-
-        // If there is no need for an end tag, remove all of it and let
-        // MakeWellFormed close it later.
-        if (!$needs_end) {
-            array_pop($result); // removes \n\n
-            array_pop($result); // removes </p>
-        }
-
-    }
-
-    /**
-     * Returns true if passed token is inline (and, ergo, allowed in
-     * paragraph tags)
-     */
-    private function _isInline($token) {
-        return isset($this->htmlDefinition->info['p']->child->elements[$token->name]);
-    }
-
-    /**
-     * Looks ahead in the token list and determines whether or not we need
-     * to insert a <p> tag.
-     */
-    private function _pLookAhead() {
-        $this->current($i, $current);
-        if ($current instanceof HTMLPurifier_Token_Start) $nesting = 1;
-        else $nesting = 0;
-        $ok = false;
-        while ($this->forwardUntilEndToken($i, $current, $nesting)) {
-            $result = $this->_checkNeedsP($current);
-            if ($result !== null) {
-                $ok = $result;
-                break;
-            }
-        }
-        return $ok;
-    }
-
-    /**
-     * Determines if a particular token requires an earlier inline token
-     * to get a paragraph. This should be used with _forwardUntilEndToken
-     */
-    private function _checkNeedsP($current) {
-        if ($current instanceof HTMLPurifier_Token_Start){
-            if (!$this->_isInline($current)) {
-                // <div>PAR1<div>
-                //      ----
-                // Terminate early, since we hit a block element
-                return false;
-            }
-        } elseif ($current instanceof HTMLPurifier_Token_Text) {
-            if (strpos($current->data, "\n\n") !== false) {
-                // <div>PAR1<b>PAR1\n\nPAR2
-                //      ----
-                return true;
-            } else {
-                // <div>PAR1<b>PAR1...
-                //      ----
-            }
-        }
-        return null;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Injector/DisplayLinkURI.php b/extlib/HTMLPurifier/HTMLPurifier/Injector/DisplayLinkURI.php
deleted file mode 100644
index 9dce9bd085..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Injector/DisplayLinkURI.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-
-/**
- * Injector that displays the URL of an anchor instead of linking to it, in addition to showing the text of the link.
- */
-class HTMLPurifier_Injector_DisplayLinkURI extends HTMLPurifier_Injector
-{
-
-    public $name = 'DisplayLinkURI';
-    public $needed = array('a');
-
-    public function handleElement(&$token) {
-    }
-
-    public function handleEnd(&$token) {
-        if (isset($token->start->attr['href'])){
-            $url = $token->start->attr['href'];
-            unset($token->start->attr['href']);
-            $token = array($token, new HTMLPurifier_Token_Text(" ($url)"));
-        } else {
-            // nothing to display
-        }
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Injector/Linkify.php b/extlib/HTMLPurifier/HTMLPurifier/Injector/Linkify.php
deleted file mode 100644
index 296dac2829..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Injector/Linkify.php
+++ /dev/null
@@ -1,46 +0,0 @@
-<?php
-
-/**
- * Injector that converts http, https and ftp text URLs to actual links.
- */
-class HTMLPurifier_Injector_Linkify extends HTMLPurifier_Injector
-{
-
-    public $name = 'Linkify';
-    public $needed = array('a' => array('href'));
-
-    public function handleText(&$token) {
-        if (!$this->allowsElement('a')) return;
-
-        if (strpos($token->data, '://') === false) {
-            // our really quick heuristic failed, abort
-            // this may not work so well if we want to match things like
-            // "google.com", but then again, most people don't
-            return;
-        }
-
-        // there is/are URL(s). Let's split the string:
-        // Note: this regex is extremely permissive
-        $bits = preg_split('#((?:https?|ftp)://[^\s\'"<>()]+)#S', $token->data, -1, PREG_SPLIT_DELIM_CAPTURE);
-
-        $token = array();
-
-        // $i = index
-        // $c = count
-        // $l = is link
-        for ($i = 0, $c = count($bits), $l = false; $i < $c; $i++, $l = !$l) {
-            if (!$l) {
-                if ($bits[$i] === '') continue;
-                $token[] = new HTMLPurifier_Token_Text($bits[$i]);
-            } else {
-                $token[] = new HTMLPurifier_Token_Start('a', array('href' => $bits[$i]));
-                $token[] = new HTMLPurifier_Token_Text($bits[$i]);
-                $token[] = new HTMLPurifier_Token_End('a');
-            }
-        }
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Injector/PurifierLinkify.php b/extlib/HTMLPurifier/HTMLPurifier/Injector/PurifierLinkify.php
deleted file mode 100644
index ad2455a91c..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Injector/PurifierLinkify.php
+++ /dev/null
@@ -1,45 +0,0 @@
-<?php
-
-/**
- * Injector that converts configuration directive syntax %Namespace.Directive
- * to links
- */
-class HTMLPurifier_Injector_PurifierLinkify extends HTMLPurifier_Injector
-{
-
-    public $name = 'PurifierLinkify';
-    public $docURL;
-    public $needed = array('a' => array('href'));
-
-    public function prepare($config, $context) {
-        $this->docURL = $config->get('AutoFormat.PurifierLinkify.DocURL');
-        return parent::prepare($config, $context);
-    }
-
-    public function handleText(&$token) {
-        if (!$this->allowsElement('a')) return;
-        if (strpos($token->data, '%') === false) return;
-
-        $bits = preg_split('#%([a-z0-9]+\.[a-z0-9]+)#Si', $token->data, -1, PREG_SPLIT_DELIM_CAPTURE);
-        $token = array();
-
-        // $i = index
-        // $c = count
-        // $l = is link
-        for ($i = 0, $c = count($bits), $l = false; $i < $c; $i++, $l = !$l) {
-            if (!$l) {
-                if ($bits[$i] === '') continue;
-                $token[] = new HTMLPurifier_Token_Text($bits[$i]);
-            } else {
-                $token[] = new HTMLPurifier_Token_Start('a',
-                    array('href' => str_replace('%s', $bits[$i], $this->docURL)));
-                $token[] = new HTMLPurifier_Token_Text('%' . $bits[$i]);
-                $token[] = new HTMLPurifier_Token_End('a');
-            }
-        }
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Injector/RemoveEmpty.php b/extlib/HTMLPurifier/HTMLPurifier/Injector/RemoveEmpty.php
deleted file mode 100644
index 638bfca03b..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Injector/RemoveEmpty.php
+++ /dev/null
@@ -1,51 +0,0 @@
-<?php
-
-class HTMLPurifier_Injector_RemoveEmpty extends HTMLPurifier_Injector
-{
-
-    private $context, $config, $attrValidator, $removeNbsp, $removeNbspExceptions;
-
-    public function prepare($config, $context) {
-        parent::prepare($config, $context);
-        $this->config = $config;
-        $this->context = $context;
-        $this->removeNbsp = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp');
-        $this->removeNbspExceptions = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions');
-        $this->attrValidator = new HTMLPurifier_AttrValidator();
-    }
-
-    public function handleElement(&$token) {
-        if (!$token instanceof HTMLPurifier_Token_Start) return;
-        $next = false;
-        for ($i = $this->inputIndex + 1, $c = count($this->inputTokens); $i < $c; $i++) {
-            $next = $this->inputTokens[$i];
-            if ($next instanceof HTMLPurifier_Token_Text) {
-                if ($next->is_whitespace) continue;
-                if ($this->removeNbsp && !isset($this->removeNbspExceptions[$token->name])) {
-                    $plain = str_replace("\xC2\xA0", "", $next->data);
-                    $isWsOrNbsp = $plain === '' || ctype_space($plain);
-                    if ($isWsOrNbsp) continue;
-                }
-            }
-            break;
-        }
-        if (!$next || ($next instanceof HTMLPurifier_Token_End && $next->name == $token->name)) {
-            if ($token->name == 'colgroup') return;
-            $this->attrValidator->validateToken($token, $this->config, $this->context);
-            $token->armor['ValidateAttributes'] = true;
-            if (isset($token->attr['id']) || isset($token->attr['name'])) return;
-            $token = $i - $this->inputIndex + 1;
-            for ($b = $this->inputIndex - 1; $b > 0; $b--) {
-                $prev = $this->inputTokens[$b];
-                if ($prev instanceof HTMLPurifier_Token_Text && $prev->is_whitespace) continue;
-                break;
-            }
-            // This is safe because we removed the token that triggered this.
-            $this->rewind($b - 1);
-            return;
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Injector/SafeObject.php b/extlib/HTMLPurifier/HTMLPurifier/Injector/SafeObject.php
deleted file mode 100644
index 3415828685..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Injector/SafeObject.php
+++ /dev/null
@@ -1,87 +0,0 @@
-<?php
-
-/**
- * Adds important param elements to inside of object in order to make
- * things safe.
- */
-class HTMLPurifier_Injector_SafeObject extends HTMLPurifier_Injector
-{
-    public $name = 'SafeObject';
-    public $needed = array('object', 'param');
-
-    protected $objectStack = array();
-    protected $paramStack  = array();
-
-    // Keep this synchronized with AttrTransform/SafeParam.php
-    protected $addParam = array(
-        'allowScriptAccess' => 'never',
-        'allowNetworking' => 'internal',
-    );
-    protected $allowedParam = array(
-        'wmode' => true,
-        'movie' => true,
-    );
-
-    public function prepare($config, $context) {
-        parent::prepare($config, $context);
-    }
-
-    public function handleElement(&$token) {
-        if ($token->name == 'object') {
-            $this->objectStack[] = $token;
-            $this->paramStack[] = array();
-            $new = array($token);
-            foreach ($this->addParam as $name => $value) {
-                $new[] = new HTMLPurifier_Token_Empty('param', array('name' => $name, 'value' => $value));
-            }
-            $token = $new;
-        } elseif ($token->name == 'param') {
-            $nest = count($this->currentNesting) - 1;
-            if ($nest >= 0 && $this->currentNesting[$nest]->name === 'object') {
-                $i = count($this->objectStack) - 1;
-                if (!isset($token->attr['name'])) {
-                    $token = false;
-                    return;
-                }
-                $n = $token->attr['name'];
-                // We need this fix because YouTube doesn't supply a data
-                // attribute, which we need if a type is specified. This is
-                // *very* Flash specific.
-                if (!isset($this->objectStack[$i]->attr['data']) && $token->attr['name'] == 'movie') {
-                    $this->objectStack[$i]->attr['data'] = $token->attr['value'];
-                }
-                // Check if the parameter is the correct value but has not
-                // already been added
-                if (
-                    !isset($this->paramStack[$i][$n]) &&
-                    isset($this->addParam[$n]) &&
-                    $token->attr['name'] === $this->addParam[$n]
-                ) {
-                    // keep token, and add to param stack
-                    $this->paramStack[$i][$n] = true;
-                } elseif (isset($this->allowedParam[$n])) {
-                    // keep token, don't do anything to it
-                    // (could possibly check for duplicates here)
-                } else {
-                    $token = false;
-                }
-            } else {
-                // not directly inside an object, DENY!
-                $token = false;
-            }
-        }
-    }
-
-    public function handleEnd(&$token) {
-        // This is the WRONG way of handling the object and param stacks;
-        // we should be inserting them directly on the relevant object tokens
-        // so that the global stack handling handles it.
-        if ($token->name == 'object') {
-            array_pop($this->objectStack);
-            array_pop($this->paramStack);
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Language.php b/extlib/HTMLPurifier/HTMLPurifier/Language.php
deleted file mode 100644
index 3e2be03b58..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Language.php
+++ /dev/null
@@ -1,163 +0,0 @@
-<?php
-
-/**
- * Represents a language and defines localizable string formatting and
- * other functions, as well as the localized messages for HTML Purifier.
- */
-class HTMLPurifier_Language
-{
-
-    /**
-     * ISO 639 language code of language. Prefers shortest possible version
-     */
-    public $code = 'en';
-
-    /**
-     * Fallback language code
-     */
-    public $fallback = false;
-
-    /**
-     * Array of localizable messages
-     */
-    public $messages = array();
-
-    /**
-     * Array of localizable error codes
-     */
-    public $errorNames = array();
-
-    /**
-     * True if no message file was found for this language, so English
-     * is being used instead. Check this if you'd like to notify the
-     * user that they've used a non-supported language.
-     */
-    public $error = false;
-
-    /**
-     * Has the language object been loaded yet?
-     * @todo Make it private, fix usage in HTMLPurifier_LanguageTest
-     */
-    public $_loaded = false;
-
-    /**
-     * Instances of HTMLPurifier_Config and HTMLPurifier_Context
-     */
-    protected $config, $context;
-
-    public function __construct($config, $context) {
-        $this->config  = $config;
-        $this->context = $context;
-    }
-
-    /**
-     * Loads language object with necessary info from factory cache
-     * @note This is a lazy loader
-     */
-    public function load() {
-        if ($this->_loaded) return;
-        $factory = HTMLPurifier_LanguageFactory::instance();
-        $factory->loadLanguage($this->code);
-        foreach ($factory->keys as $key) {
-            $this->$key = $factory->cache[$this->code][$key];
-        }
-        $this->_loaded = true;
-    }
-
-    /**
-     * Retrieves a localised message.
-     * @param $key string identifier of message
-     * @return string localised message
-     */
-    public function getMessage($key) {
-        if (!$this->_loaded) $this->load();
-        if (!isset($this->messages[$key])) return "[$key]";
-        return $this->messages[$key];
-    }
-
-    /**
-     * Retrieves a localised error name.
-     * @param $int integer error number, corresponding to PHP's error
-     *             reporting
-     * @return string localised message
-     */
-    public function getErrorName($int) {
-        if (!$this->_loaded) $this->load();
-        if (!isset($this->errorNames[$int])) return "[Error: $int]";
-        return $this->errorNames[$int];
-    }
-
-    /**
-     * Converts an array list into a string readable representation
-     */
-    public function listify($array) {
-        $sep      = $this->getMessage('Item separator');
-        $sep_last = $this->getMessage('Item separator last');
-        $ret = '';
-        for ($i = 0, $c = count($array); $i < $c; $i++) {
-            if ($i == 0) {
-            } elseif ($i + 1 < $c) {
-                $ret .= $sep;
-            } else {
-                $ret .= $sep_last;
-            }
-            $ret .= $array[$i];
-        }
-        return $ret;
-    }
-
-    /**
-     * Formats a localised message with passed parameters
-     * @param $key string identifier of message
-     * @param $args Parameters to substitute in
-     * @return string localised message
-     * @todo Implement conditionals? Right now, some messages make
-     *     reference to line numbers, but those aren't always available
-     */
-    public function formatMessage($key, $args = array()) {
-        if (!$this->_loaded) $this->load();
-        if (!isset($this->messages[$key])) return "[$key]";
-        $raw = $this->messages[$key];
-        $subst = array();
-        $generator = false;
-        foreach ($args as $i => $value) {
-            if (is_object($value)) {
-                if ($value instanceof HTMLPurifier_Token) {
-                    // factor this out some time
-                    if (!$generator) $generator = $this->context->get('Generator');
-                    if (isset($value->name)) $subst['$'.$i.'.Name'] = $value->name;
-                    if (isset($value->data)) $subst['$'.$i.'.Data'] = $value->data;
-                    $subst['$'.$i.'.Compact'] =
-                    $subst['$'.$i.'.Serialized'] = $generator->generateFromToken($value);
-                    // a more complex algorithm for compact representation
-                    // could be introduced for all types of tokens. This
-                    // may need to be factored out into a dedicated class
-                    if (!empty($value->attr)) {
-                        $stripped_token = clone $value;
-                        $stripped_token->attr = array();
-                        $subst['$'.$i.'.Compact'] = $generator->generateFromToken($stripped_token);
-                    }
-                    $subst['$'.$i.'.Line'] = $value->line ? $value->line : 'unknown';
-                }
-                continue;
-            } elseif (is_array($value)) {
-                $keys = array_keys($value);
-                if (array_keys($keys) === $keys) {
-                    // list
-                    $subst['$'.$i] = $this->listify($value);
-                } else {
-                    // associative array
-                    // no $i implementation yet, sorry
-                    $subst['$'.$i.'.Keys'] = $this->listify($keys);
-                    $subst['$'.$i.'.Values'] = $this->listify(array_values($value));
-                }
-                continue;
-            }
-            $subst['$' . $i] = $value;
-        }
-        return strtr($raw, $subst);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Language/classes/en-x-test.php b/extlib/HTMLPurifier/HTMLPurifier/Language/classes/en-x-test.php
deleted file mode 100644
index d52fcb7ac1..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Language/classes/en-x-test.php
+++ /dev/null
@@ -1,12 +0,0 @@
-<?php
-
-// private class for unit testing
-
-class HTMLPurifier_Language_en_x_test extends HTMLPurifier_Language
-{
-
-
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Language/messages/en-x-test.php b/extlib/HTMLPurifier/HTMLPurifier/Language/messages/en-x-test.php
deleted file mode 100644
index 1c046f379e..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Language/messages/en-x-test.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-// private language message file for unit testing purposes
-
-$fallback = 'en';
-
-$messages = array(
-    'HTMLPurifier' => 'HTML Purifier X'
-);
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Language/messages/en-x-testmini.php b/extlib/HTMLPurifier/HTMLPurifier/Language/messages/en-x-testmini.php
deleted file mode 100644
index 806c83fbf7..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Language/messages/en-x-testmini.php
+++ /dev/null
@@ -1,12 +0,0 @@
-<?php
-
-// private language message file for unit testing purposes
-// this language file has no class associated with it
-
-$fallback = 'en';
-
-$messages = array(
-    'HTMLPurifier' => 'HTML Purifier XNone'
-);
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Language/messages/en.php b/extlib/HTMLPurifier/HTMLPurifier/Language/messages/en.php
deleted file mode 100644
index aab2e52ebc..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Language/messages/en.php
+++ /dev/null
@@ -1,62 +0,0 @@
-<?php
-
-$fallback = false;
-
-$messages = array(
-
-'HTMLPurifier' => 'HTML Purifier',
-
-// for unit testing purposes
-'LanguageFactoryTest: Pizza' => 'Pizza',
-'LanguageTest: List' => '$1',
-'LanguageTest: Hash' => '$1.Keys; $1.Values',
-
-'Item separator' => ', ',
-'Item separator last' => ' and ', // non-Harvard style
-
-'ErrorCollector: No errors' => 'No errors detected. However, because error reporting is still incomplete, there may have been errors that the error collector was not notified of; please inspect the output HTML carefully.',
-'ErrorCollector: At line'   => ' at line $line',
-'ErrorCollector: Incidental errors'  => 'Incidental errors',
-
-'Lexer: Unclosed comment'      => 'Unclosed comment',
-'Lexer: Unescaped lt'          => 'Unescaped less-than sign (<) should be &lt;',
-'Lexer: Missing gt'            => 'Missing greater-than sign (>), previous less-than sign (<) should be escaped',
-'Lexer: Missing attribute key' => 'Attribute declaration has no key',
-'Lexer: Missing end quote'     => 'Attribute declaration has no end quote',
-
-'Strategy_RemoveForeignElements: Tag transform'              => '<$1> element transformed into $CurrentToken.Serialized',
-'Strategy_RemoveForeignElements: Missing required attribute' => '$CurrentToken.Compact element missing required attribute $1',
-'Strategy_RemoveForeignElements: Foreign element to text'    => 'Unrecognized $CurrentToken.Serialized tag converted to text',
-'Strategy_RemoveForeignElements: Foreign element removed'    => 'Unrecognized $CurrentToken.Serialized tag removed',
-'Strategy_RemoveForeignElements: Comment removed'            => 'Comment containing "$CurrentToken.Data" removed',
-'Strategy_RemoveForeignElements: Foreign meta element removed' => 'Unrecognized $CurrentToken.Serialized meta tag and all descendants removed',
-'Strategy_RemoveForeignElements: Token removed to end'       => 'Tags and text starting from $1 element where removed to end',
-'Strategy_RemoveForeignElements: Trailing hyphen in comment removed' => 'Trailing hyphen(s) in comment removed',
-'Strategy_RemoveForeignElements: Hyphens in comment collapsed' => 'Double hyphens in comments are not allowed, and were collapsed into single hyphens',
-
-'Strategy_MakeWellFormed: Unnecessary end tag removed' => 'Unnecessary $CurrentToken.Serialized tag removed',
-'Strategy_MakeWellFormed: Unnecessary end tag to text' => 'Unnecessary $CurrentToken.Serialized tag converted to text',
-'Strategy_MakeWellFormed: Tag auto closed'             => '$1.Compact started on line $1.Line auto-closed by $CurrentToken.Compact',
-'Strategy_MakeWellFormed: Tag carryover'               => '$1.Compact started on line $1.Line auto-continued into $CurrentToken.Compact',
-'Strategy_MakeWellFormed: Stray end tag removed'       => 'Stray $CurrentToken.Serialized tag removed',
-'Strategy_MakeWellFormed: Stray end tag to text'       => 'Stray $CurrentToken.Serialized tag converted to text',
-'Strategy_MakeWellFormed: Tag closed by element end'   => '$1.Compact tag started on line $1.Line closed by end of $CurrentToken.Serialized',
-'Strategy_MakeWellFormed: Tag closed by document end'  => '$1.Compact tag started on line $1.Line closed by end of document',
-
-'Strategy_FixNesting: Node removed'          => '$CurrentToken.Compact node removed',
-'Strategy_FixNesting: Node excluded'         => '$CurrentToken.Compact node removed due to descendant exclusion by ancestor element',
-'Strategy_FixNesting: Node reorganized'      => 'Contents of $CurrentToken.Compact node reorganized to enforce its content model',
-'Strategy_FixNesting: Node contents removed' => 'Contents of $CurrentToken.Compact node removed',
-
-'AttrValidator: Attributes transformed' => 'Attributes on $CurrentToken.Compact transformed from $1.Keys to $2.Keys',
-'AttrValidator: Attribute removed' => '$CurrentAttr.Name attribute on $CurrentToken.Compact removed',
-
-);
-
-$errorNames = array(
-    E_ERROR   => 'Error',
-    E_WARNING => 'Warning',
-    E_NOTICE  => 'Notice'
-);
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/LanguageFactory.php b/extlib/HTMLPurifier/HTMLPurifier/LanguageFactory.php
deleted file mode 100644
index 134ef8c745..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/LanguageFactory.php
+++ /dev/null
@@ -1,198 +0,0 @@
-<?php
-
-/**
- * Class responsible for generating HTMLPurifier_Language objects, managing
- * caching and fallbacks.
- * @note Thanks to MediaWiki for the general logic, although this version
- *       has been entirely rewritten
- * @todo Serialized cache for languages
- */
-class HTMLPurifier_LanguageFactory
-{
-
-    /**
-     * Cache of language code information used to load HTMLPurifier_Language objects
-     * Structure is: $factory->cache[$language_code][$key] = $value
-     * @value array map
-     */
-    public $cache;
-
-    /**
-     * Valid keys in the HTMLPurifier_Language object. Designates which
-     * variables to slurp out of a message file.
-     * @value array list
-     */
-    public $keys = array('fallback', 'messages', 'errorNames');
-
-    /**
-     * Instance of HTMLPurifier_AttrDef_Lang to validate language codes
-     * @value object HTMLPurifier_AttrDef_Lang
-     */
-    protected $validator;
-
-    /**
-     * Cached copy of dirname(__FILE__), directory of current file without
-     * trailing slash
-     * @value string filename
-     */
-    protected $dir;
-
-    /**
-     * Keys whose contents are a hash map and can be merged
-     * @value array lookup
-     */
-    protected $mergeable_keys_map = array('messages' => true, 'errorNames' => true);
-
-    /**
-     * Keys whose contents are a list and can be merged
-     * @value array lookup
-     */
-    protected $mergeable_keys_list = array();
-
-    /**
-     * Retrieve sole instance of the factory.
-     * @param $prototype Optional prototype to overload sole instance with,
-     *                   or bool true to reset to default factory.
-     */
-    public static function instance($prototype = null) {
-        static $instance = null;
-        if ($prototype !== null) {
-            $instance = $prototype;
-        } elseif ($instance === null || $prototype == true) {
-            $instance = new HTMLPurifier_LanguageFactory();
-            $instance->setup();
-        }
-        return $instance;
-    }
-
-    /**
-     * Sets up the singleton, much like a constructor
-     * @note Prevents people from getting this outside of the singleton
-     */
-    public function setup() {
-        $this->validator = new HTMLPurifier_AttrDef_Lang();
-        $this->dir = HTMLPURIFIER_PREFIX . '/HTMLPurifier';
-    }
-
-    /**
-     * Creates a language object, handles class fallbacks
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @param $code Code to override configuration with. Private parameter.
-     */
-    public function create($config, $context, $code = false) {
-
-        // validate language code
-        if ($code === false) {
-            $code = $this->validator->validate(
-              $config->get('Core.Language'), $config, $context
-            );
-        } else {
-            $code = $this->validator->validate($code, $config, $context);
-        }
-        if ($code === false) $code = 'en'; // malformed code becomes English
-
-        $pcode = str_replace('-', '_', $code); // make valid PHP classname
-        static $depth = 0; // recursion protection
-
-        if ($code == 'en') {
-            $lang = new HTMLPurifier_Language($config, $context);
-        } else {
-            $class = 'HTMLPurifier_Language_' . $pcode;
-            $file  = $this->dir . '/Language/classes/' . $code . '.php';
-            if (file_exists($file) || class_exists($class, false)) {
-                $lang = new $class($config, $context);
-            } else {
-                // Go fallback
-                $raw_fallback = $this->getFallbackFor($code);
-                $fallback = $raw_fallback ? $raw_fallback : 'en';
-                $depth++;
-                $lang = $this->create($config, $context, $fallback);
-                if (!$raw_fallback) {
-                    $lang->error = true;
-                }
-                $depth--;
-            }
-        }
-
-        $lang->code = $code;
-
-        return $lang;
-
-    }
-
-    /**
-     * Returns the fallback language for language
-     * @note Loads the original language into cache
-     * @param $code string language code
-     */
-    public function getFallbackFor($code) {
-        $this->loadLanguage($code);
-        return $this->cache[$code]['fallback'];
-    }
-
-    /**
-     * Loads language into the cache, handles message file and fallbacks
-     * @param $code string language code
-     */
-    public function loadLanguage($code) {
-        static $languages_seen = array(); // recursion guard
-
-        // abort if we've already loaded it
-        if (isset($this->cache[$code])) return;
-
-        // generate filename
-        $filename = $this->dir . '/Language/messages/' . $code . '.php';
-
-        // default fallback : may be overwritten by the ensuing include
-        $fallback = ($code != 'en') ? 'en' : false;
-
-        // load primary localisation
-        if (!file_exists($filename)) {
-            // skip the include: will rely solely on fallback
-            $filename = $this->dir . '/Language/messages/en.php';
-            $cache = array();
-        } else {
-            include $filename;
-            $cache = compact($this->keys);
-        }
-
-        // load fallback localisation
-        if (!empty($fallback)) {
-
-            // infinite recursion guard
-            if (isset($languages_seen[$code])) {
-                trigger_error('Circular fallback reference in language ' .
-                    $code, E_USER_ERROR);
-                $fallback = 'en';
-            }
-            $language_seen[$code] = true;
-
-            // load the fallback recursively
-            $this->loadLanguage($fallback);
-            $fallback_cache = $this->cache[$fallback];
-
-            // merge fallback with current language
-            foreach ( $this->keys as $key ) {
-                if (isset($cache[$key]) && isset($fallback_cache[$key])) {
-                    if (isset($this->mergeable_keys_map[$key])) {
-                        $cache[$key] = $cache[$key] + $fallback_cache[$key];
-                    } elseif (isset($this->mergeable_keys_list[$key])) {
-                        $cache[$key] = array_merge( $fallback_cache[$key], $cache[$key] );
-                    }
-                } else {
-                    $cache[$key] = $fallback_cache[$key];
-                }
-            }
-
-        }
-
-        // save to cache for later retrieval
-        $this->cache[$code] = $cache;
-
-        return;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Length.php b/extlib/HTMLPurifier/HTMLPurifier/Length.php
deleted file mode 100644
index 8d2a46b7da..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Length.php
+++ /dev/null
@@ -1,115 +0,0 @@
-<?php
-
-/**
- * Represents a measurable length, with a string numeric magnitude
- * and a unit. This object is immutable.
- */
-class HTMLPurifier_Length
-{
-
-    /**
-     * String numeric magnitude.
-     */
-    protected $n;
-
-    /**
-     * String unit. False is permitted if $n = 0.
-     */
-    protected $unit;
-
-    /**
-     * Whether or not this length is valid. Null if not calculated yet.
-     */
-    protected $isValid;
-
-    /**
-     * Lookup array of units recognized by CSS 2.1
-     */
-    protected static $allowedUnits = array(
-        'em' => true, 'ex' => true, 'px' => true, 'in' => true,
-        'cm' => true, 'mm' => true, 'pt' => true, 'pc' => true
-    );
-
-    /**
-     * @param number $n Magnitude
-     * @param string $u Unit
-     */
-    public function __construct($n = '0', $u = false) {
-        $this->n = (string) $n;
-        $this->unit = $u !== false ? (string) $u : false;
-    }
-
-    /**
-     * @param string $s Unit string, like '2em' or '3.4in'
-     * @warning Does not perform validation.
-     */
-    static public function make($s) {
-        if ($s instanceof HTMLPurifier_Length) return $s;
-        $n_length = strspn($s, '1234567890.+-');
-        $n = substr($s, 0, $n_length);
-        $unit = substr($s, $n_length);
-        if ($unit === '') $unit = false;
-        return new HTMLPurifier_Length($n, $unit);
-    }
-
-    /**
-     * Validates the number and unit.
-     */
-    protected function validate() {
-        // Special case:
-        if ($this->n === '+0' || $this->n === '-0') $this->n = '0';
-        if ($this->n === '0' && $this->unit === false) return true;
-        if (!ctype_lower($this->unit)) $this->unit = strtolower($this->unit);
-        if (!isset(HTMLPurifier_Length::$allowedUnits[$this->unit])) return false;
-        // Hack:
-        $def = new HTMLPurifier_AttrDef_CSS_Number();
-        $result = $def->validate($this->n, false, false);
-        if ($result === false) return false;
-        $this->n = $result;
-        return true;
-    }
-
-    /**
-     * Returns string representation of number.
-     */
-    public function toString() {
-        if (!$this->isValid()) return false;
-        return $this->n . $this->unit;
-    }
-
-    /**
-     * Retrieves string numeric magnitude.
-     */
-    public function getN() {return $this->n;}
-
-    /**
-     * Retrieves string unit.
-     */
-    public function getUnit() {return $this->unit;}
-
-    /**
-     * Returns true if this length unit is valid.
-     */
-    public function isValid() {
-        if ($this->isValid === null) $this->isValid = $this->validate();
-        return $this->isValid;
-    }
-
-    /**
-     * Compares two lengths, and returns 1 if greater, -1 if less and 0 if equal.
-     * @warning If both values are too large or small, this calculation will
-     *          not work properly
-     */
-    public function compareTo($l) {
-        if ($l === false) return false;
-        if ($l->unit !== $this->unit) {
-            $converter = new HTMLPurifier_UnitConverter();
-            $l = $converter->convert($l, $this->unit);
-            if ($l === false) return false;
-        }
-        return $this->n - $l->n;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Lexer.php b/extlib/HTMLPurifier/HTMLPurifier/Lexer.php
deleted file mode 100644
index 8cce008d3d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Lexer.php
+++ /dev/null
@@ -1,298 +0,0 @@
-<?php
-
-/**
- * Forgivingly lexes HTML (SGML-style) markup into tokens.
- *
- * A lexer parses a string of SGML-style markup and converts them into
- * corresponding tokens.  It doesn't check for well-formedness, although its
- * internal mechanism may make this automatic (such as the case of
- * HTMLPurifier_Lexer_DOMLex).  There are several implementations to choose
- * from.
- *
- * A lexer is HTML-oriented: it might work with XML, but it's not
- * recommended, as we adhere to a subset of the specification for optimization
- * reasons. This might change in the future. Also, most tokenizers are not
- * expected to handle DTDs or PIs.
- *
- * This class should not be directly instantiated, but you may use create() to
- * retrieve a default copy of the lexer.  Being a supertype, this class
- * does not actually define any implementation, but offers commonly used
- * convenience functions for subclasses.
- *
- * @note The unit tests will instantiate this class for testing purposes, as
- *       many of the utility functions require a class to be instantiated.
- *       This means that, even though this class is not runnable, it will
- *       not be declared abstract.
- *
- * @par
- *
- * @note
- * We use tokens rather than create a DOM representation because DOM would:
- *
- * @par
- *  -# Require more processing and memory to create,
- *  -# Is not streamable, and
- *  -# Has the entire document structure (html and body not needed).
- *
- * @par
- * However, DOM is helpful in that it makes it easy to move around nodes
- * without a lot of lookaheads to see when a tag is closed. This is a
- * limitation of the token system and some workarounds would be nice.
- */
-class HTMLPurifier_Lexer
-{
-
-    /**
-     * Whether or not this lexer implements line-number/column-number tracking.
-     * If it does, set to true.
-     */
-    public $tracksLineNumbers = false;
-
-    // -- STATIC ----------------------------------------------------------
-
-    /**
-     * Retrieves or sets the default Lexer as a Prototype Factory.
-     *
-     * By default HTMLPurifier_Lexer_DOMLex will be returned. There are
-     * a few exceptions involving special features that only DirectLex
-     * implements.
-     *
-     * @note The behavior of this class has changed, rather than accepting
-     *       a prototype object, it now accepts a configuration object.
-     *       To specify your own prototype, set %Core.LexerImpl to it.
-     *       This change in behavior de-singletonizes the lexer object.
-     *
-     * @param $config Instance of HTMLPurifier_Config
-     * @return Concrete lexer.
-     */
-    public static function create($config) {
-
-        if (!($config instanceof HTMLPurifier_Config)) {
-            $lexer = $config;
-            trigger_error("Passing a prototype to
-              HTMLPurifier_Lexer::create() is deprecated, please instead
-              use %Core.LexerImpl", E_USER_WARNING);
-        } else {
-            $lexer = $config->get('Core.LexerImpl');
-        }
-
-        $needs_tracking =
-            $config->get('Core.MaintainLineNumbers') ||
-            $config->get('Core.CollectErrors');
-
-        $inst = null;
-        if (is_object($lexer)) {
-            $inst = $lexer;
-        } else {
-
-            if (is_null($lexer)) { do {
-                // auto-detection algorithm
-
-                if ($needs_tracking) {
-                    $lexer = 'DirectLex';
-                    break;
-                }
-
-                if (
-                    class_exists('DOMDocument') &&
-                    method_exists('DOMDocument', 'loadHTML') &&
-                    !extension_loaded('domxml')
-                ) {
-                    // check for DOM support, because while it's part of the
-                    // core, it can be disabled compile time. Also, the PECL
-                    // domxml extension overrides the default DOM, and is evil
-                    // and nasty and we shan't bother to support it
-                    $lexer = 'DOMLex';
-                } else {
-                    $lexer = 'DirectLex';
-                }
-
-            } while(0); } // do..while so we can break
-
-            // instantiate recognized string names
-            switch ($lexer) {
-                case 'DOMLex':
-                    $inst = new HTMLPurifier_Lexer_DOMLex();
-                    break;
-                case 'DirectLex':
-                    $inst = new HTMLPurifier_Lexer_DirectLex();
-                    break;
-                case 'PH5P':
-                    $inst = new HTMLPurifier_Lexer_PH5P();
-                    break;
-                default:
-                    throw new HTMLPurifier_Exception("Cannot instantiate unrecognized Lexer type " . htmlspecialchars($lexer));
-            }
-        }
-
-        if (!$inst) throw new HTMLPurifier_Exception('No lexer was instantiated');
-
-        // once PHP DOM implements native line numbers, or we
-        // hack out something using XSLT, remove this stipulation
-        if ($needs_tracking && !$inst->tracksLineNumbers) {
-            throw new HTMLPurifier_Exception('Cannot use lexer that does not support line numbers with Core.MaintainLineNumbers or Core.CollectErrors (use DirectLex instead)');
-        }
-
-        return $inst;
-
-    }
-
-    // -- CONVENIENCE MEMBERS ---------------------------------------------
-
-    public function __construct() {
-        $this->_entity_parser = new HTMLPurifier_EntityParser();
-    }
-
-    /**
-     * Most common entity to raw value conversion table for special entities.
-     */
-    protected $_special_entity2str =
-            array(
-                    '&quot;' => '"',
-                    '&amp;'  => '&',
-                    '&lt;'   => '<',
-                    '&gt;'   => '>',
-                    '&#39;'  => "'",
-                    '&#039;' => "'",
-                    '&#x27;' => "'"
-            );
-
-    /**
-     * Parses special entities into the proper characters.
-     *
-     * This string will translate escaped versions of the special characters
-     * into the correct ones.
-     *
-     * @warning
-     * You should be able to treat the output of this function as
-     * completely parsed, but that's only because all other entities should
-     * have been handled previously in substituteNonSpecialEntities()
-     *
-     * @param $string String character data to be parsed.
-     * @returns Parsed character data.
-     */
-    public function parseData($string) {
-
-        // following functions require at least one character
-        if ($string === '') return '';
-
-        // subtracts amps that cannot possibly be escaped
-        $num_amp = substr_count($string, '&') - substr_count($string, '& ') -
-            ($string[strlen($string)-1] === '&' ? 1 : 0);
-
-        if (!$num_amp) return $string; // abort if no entities
-        $num_esc_amp = substr_count($string, '&amp;');
-        $string = strtr($string, $this->_special_entity2str);
-
-        // code duplication for sake of optimization, see above
-        $num_amp_2 = substr_count($string, '&') - substr_count($string, '& ') -
-            ($string[strlen($string)-1] === '&' ? 1 : 0);
-
-        if ($num_amp_2 <= $num_esc_amp) return $string;
-
-        // hmm... now we have some uncommon entities. Use the callback.
-        $string = $this->_entity_parser->substituteSpecialEntities($string);
-        return $string;
-    }
-
-    /**
-     * Lexes an HTML string into tokens.
-     *
-     * @param $string String HTML.
-     * @return HTMLPurifier_Token array representation of HTML.
-     */
-    public function tokenizeHTML($string, $config, $context) {
-        trigger_error('Call to abstract class', E_USER_ERROR);
-    }
-
-    /**
-     * Translates CDATA sections into regular sections (through escaping).
-     *
-     * @param $string HTML string to process.
-     * @returns HTML with CDATA sections escaped.
-     */
-    protected static function escapeCDATA($string) {
-        return preg_replace_callback(
-            '/<!\[CDATA\[(.+?)\]\]>/s',
-            array('HTMLPurifier_Lexer', 'CDATACallback'),
-            $string
-        );
-    }
-
-    /**
-     * Special CDATA case that is especially convoluted for <script>
-     */
-    protected static function escapeCommentedCDATA($string) {
-        return preg_replace_callback(
-            '#<!--//--><!\[CDATA\[//><!--(.+?)//--><!\]\]>#s',
-            array('HTMLPurifier_Lexer', 'CDATACallback'),
-            $string
-        );
-    }
-
-    /**
-     * Callback function for escapeCDATA() that does the work.
-     *
-     * @warning Though this is public in order to let the callback happen,
-     *          calling it directly is not recommended.
-     * @params $matches PCRE matches array, with index 0 the entire match
-     *                  and 1 the inside of the CDATA section.
-     * @returns Escaped internals of the CDATA section.
-     */
-    protected static function CDATACallback($matches) {
-        // not exactly sure why the character set is needed, but whatever
-        return htmlspecialchars($matches[1], ENT_COMPAT, 'UTF-8');
-    }
-
-    /**
-     * Takes a piece of HTML and normalizes it by converting entities, fixing
-     * encoding, extracting bits, and other good stuff.
-     * @todo Consider making protected
-     */
-    public function normalize($html, $config, $context) {
-
-        // normalize newlines to \n
-        $html = str_replace("\r\n", "\n", $html);
-        $html = str_replace("\r", "\n", $html);
-
-        if ($config->get('HTML.Trusted')) {
-            // escape convoluted CDATA
-            $html = $this->escapeCommentedCDATA($html);
-        }
-
-        // escape CDATA
-        $html = $this->escapeCDATA($html);
-
-        // extract body from document if applicable
-        if ($config->get('Core.ConvertDocumentToFragment')) {
-            $html = $this->extractBody($html);
-        }
-
-        // expand entities that aren't the big five
-        $html = $this->_entity_parser->substituteNonSpecialEntities($html);
-
-        // clean into wellformed UTF-8 string for an SGML context: this has
-        // to be done after entity expansion because the entities sometimes
-        // represent non-SGML characters (horror, horror!)
-        $html = HTMLPurifier_Encoder::cleanUTF8($html);
-
-        return $html;
-    }
-
-    /**
-     * Takes a string of HTML (fragment or document) and returns the content
-     * @todo Consider making protected
-     */
-    public function extractBody($html) {
-        $matches = array();
-        $result = preg_match('!<body[^>]*>(.*)</body>!is', $html, $matches);
-        if ($result) {
-            return $matches[1];
-        } else {
-            return $html;
-        }
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Lexer/DOMLex.php b/extlib/HTMLPurifier/HTMLPurifier/Lexer/DOMLex.php
deleted file mode 100644
index 20dc2ed48c..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Lexer/DOMLex.php
+++ /dev/null
@@ -1,213 +0,0 @@
-<?php
-
-/**
- * Parser that uses PHP 5's DOM extension (part of the core).
- *
- * In PHP 5, the DOM XML extension was revamped into DOM and added to the core.
- * It gives us a forgiving HTML parser, which we use to transform the HTML
- * into a DOM, and then into the tokens.  It is blazingly fast (for large
- * documents, it performs twenty times faster than
- * HTMLPurifier_Lexer_DirectLex,and is the default choice for PHP 5.
- *
- * @note Any empty elements will have empty tokens associated with them, even if
- * this is prohibited by the spec. This is cannot be fixed until the spec
- * comes into play.
- *
- * @note PHP's DOM extension does not actually parse any entities, we use
- *       our own function to do that.
- *
- * @warning DOM tends to drop whitespace, which may wreak havoc on indenting.
- *          If this is a huge problem, due to the fact that HTML is hand
- *          edited and you are unable to get a parser cache that caches the
- *          the output of HTML Purifier while keeping the original HTML lying
- *          around, you may want to run Tidy on the resulting output or use
- *          HTMLPurifier_DirectLex
- */
-
-class HTMLPurifier_Lexer_DOMLex extends HTMLPurifier_Lexer
-{
-
-    private $factory;
-
-    public function __construct() {
-        // setup the factory
-        parent::__construct();
-        $this->factory = new HTMLPurifier_TokenFactory();
-    }
-
-    public function tokenizeHTML($html, $config, $context) {
-
-        $html = $this->normalize($html, $config, $context);
-
-        // attempt to armor stray angled brackets that cannot possibly
-        // form tags and thus are probably being used as emoticons
-        if ($config->get('Core.AggressivelyFixLt')) {
-            $char = '[^a-z!\/]';
-            $comment = "/<!--(.*?)(-->|\z)/is";
-            $html = preg_replace_callback($comment, array($this, 'callbackArmorCommentEntities'), $html);
-            do {
-                $old = $html;
-                $html = preg_replace("/<($char)/i", '&lt;\\1', $html);
-            } while ($html !== $old);
-            $html = preg_replace_callback($comment, array($this, 'callbackUndoCommentSubst'), $html); // fix comments
-        }
-
-        // preprocess html, essential for UTF-8
-        $html = $this->wrapHTML($html, $config, $context);
-
-        $doc = new DOMDocument();
-        $doc->encoding = 'UTF-8'; // theoretically, the above has this covered
-
-        set_error_handler(array($this, 'muteErrorHandler'));
-        $doc->loadHTML($html);
-        restore_error_handler();
-
-        $tokens = array();
-        $this->tokenizeDOM(
-            $doc->getElementsByTagName('html')->item(0)-> // <html>
-                  getElementsByTagName('body')->item(0)-> //   <body>
-                  getElementsByTagName('div')->item(0)    //     <div>
-            , $tokens);
-        return $tokens;
-    }
-
-    /**
-     * Recursive function that tokenizes a node, putting it into an accumulator.
-     *
-     * @param $node     DOMNode to be tokenized.
-     * @param $tokens   Array-list of already tokenized tokens.
-     * @param $collect  Says whether or start and close are collected, set to
-     *                  false at first recursion because it's the implicit DIV
-     *                  tag you're dealing with.
-     * @returns Tokens of node appended to previously passed tokens.
-     */
-    protected function tokenizeDOM($node, &$tokens, $collect = false) {
-
-        // intercept non element nodes. WE MUST catch all of them,
-        // but we're not getting the character reference nodes because
-        // those should have been preprocessed
-        if ($node->nodeType === XML_TEXT_NODE) {
-            $tokens[] = $this->factory->createText($node->data);
-            return;
-        } elseif ($node->nodeType === XML_CDATA_SECTION_NODE) {
-            // undo libxml's special treatment of <script> and <style> tags
-            $last = end($tokens);
-            $data = $node->data;
-            // (note $node->tagname is already normalized)
-            if ($last instanceof HTMLPurifier_Token_Start && ($last->name == 'script' || $last->name == 'style')) {
-                $new_data = trim($data);
-                if (substr($new_data, 0, 4) === '<!--') {
-                    $data = substr($new_data, 4);
-                    if (substr($data, -3) === '-->') {
-                        $data = substr($data, 0, -3);
-                    } else {
-                        // Highly suspicious! Not sure what to do...
-                    }
-                }
-            }
-            $tokens[] = $this->factory->createText($this->parseData($data));
-            return;
-        } elseif ($node->nodeType === XML_COMMENT_NODE) {
-            // this is code is only invoked for comments in script/style in versions
-            // of libxml pre-2.6.28 (regular comments, of course, are still
-            // handled regularly)
-            $tokens[] = $this->factory->createComment($node->data);
-            return;
-        } elseif (
-            // not-well tested: there may be other nodes we have to grab
-            $node->nodeType !== XML_ELEMENT_NODE
-        ) {
-            return;
-        }
-
-        $attr = $node->hasAttributes() ?
-            $this->transformAttrToAssoc($node->attributes) :
-            array();
-
-        // We still have to make sure that the element actually IS empty
-        if (!$node->childNodes->length) {
-            if ($collect) {
-                $tokens[] = $this->factory->createEmpty($node->tagName, $attr);
-            }
-        } else {
-            if ($collect) { // don't wrap on first iteration
-                $tokens[] = $this->factory->createStart(
-                    $tag_name = $node->tagName, // somehow, it get's dropped
-                    $attr
-                );
-            }
-            foreach ($node->childNodes as $node) {
-                // remember, it's an accumulator. Otherwise, we'd have
-                // to use array_merge
-                $this->tokenizeDOM($node, $tokens, true);
-            }
-            if ($collect) {
-                $tokens[] = $this->factory->createEnd($tag_name);
-            }
-        }
-
-    }
-
-    /**
-     * Converts a DOMNamedNodeMap of DOMAttr objects into an assoc array.
-     *
-     * @param $attribute_list DOMNamedNodeMap of DOMAttr objects.
-     * @returns Associative array of attributes.
-     */
-    protected function transformAttrToAssoc($node_map) {
-        // NamedNodeMap is documented very well, so we're using undocumented
-        // features, namely, the fact that it implements Iterator and
-        // has a ->length attribute
-        if ($node_map->length === 0) return array();
-        $array = array();
-        foreach ($node_map as $attr) {
-            $array[$attr->name] = $attr->value;
-        }
-        return $array;
-    }
-
-    /**
-     * An error handler that mutes all errors
-     */
-    public function muteErrorHandler($errno, $errstr) {}
-
-    /**
-     * Callback function for undoing escaping of stray angled brackets
-     * in comments
-     */
-    public function callbackUndoCommentSubst($matches) {
-        return '<!--' . strtr($matches[1], array('&amp;'=>'&','&lt;'=>'<')) . $matches[2];
-    }
-
-    /**
-     * Callback function that entity-izes ampersands in comments so that
-     * callbackUndoCommentSubst doesn't clobber them
-     */
-    public function callbackArmorCommentEntities($matches) {
-        return '<!--' . str_replace('&', '&amp;', $matches[1]) . $matches[2];
-    }
-
-    /**
-     * Wraps an HTML fragment in the necessary HTML
-     */
-    protected function wrapHTML($html, $config, $context) {
-        $def = $config->getDefinition('HTML');
-        $ret = '';
-
-        if (!empty($def->doctype->dtdPublic) || !empty($def->doctype->dtdSystem)) {
-            $ret .= '<!DOCTYPE html ';
-            if (!empty($def->doctype->dtdPublic)) $ret .= 'PUBLIC "' . $def->doctype->dtdPublic . '" ';
-            if (!empty($def->doctype->dtdSystem)) $ret .= '"' . $def->doctype->dtdSystem . '" ';
-            $ret .= '>';
-        }
-
-        $ret .= '<html><head>';
-        $ret .= '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
-        // No protection if $html contains a stray </div>!
-        $ret .= '</head><body><div>'.$html.'</div></body></html>';
-        return $ret;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Lexer/DirectLex.php b/extlib/HTMLPurifier/HTMLPurifier/Lexer/DirectLex.php
deleted file mode 100644
index 439409d051..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Lexer/DirectLex.php
+++ /dev/null
@@ -1,490 +0,0 @@
-<?php
-
-/**
- * Our in-house implementation of a parser.
- *
- * A pure PHP parser, DirectLex has absolutely no dependencies, making
- * it a reasonably good default for PHP4.  Written with efficiency in mind,
- * it can be four times faster than HTMLPurifier_Lexer_PEARSax3, although it
- * pales in comparison to HTMLPurifier_Lexer_DOMLex.
- *
- * @todo Reread XML spec and document differences.
- */
-class HTMLPurifier_Lexer_DirectLex extends HTMLPurifier_Lexer
-{
-
-    public $tracksLineNumbers = true;
-
-    /**
-     * Whitespace characters for str(c)spn.
-     */
-    protected $_whitespace = "\x20\x09\x0D\x0A";
-
-    /**
-     * Callback function for script CDATA fudge
-     * @param $matches, in form of array(opening tag, contents, closing tag)
-     */
-    protected function scriptCallback($matches) {
-        return $matches[1] . htmlspecialchars($matches[2], ENT_COMPAT, 'UTF-8') . $matches[3];
-    }
-
-    public function tokenizeHTML($html, $config, $context) {
-
-        // special normalization for script tags without any armor
-        // our "armor" heurstic is a < sign any number of whitespaces after
-        // the first script tag
-        if ($config->get('HTML.Trusted')) {
-            $html = preg_replace_callback('#(<script[^>]*>)(\s*[^<].+?)(</script>)#si',
-                array($this, 'scriptCallback'), $html);
-        }
-
-        $html = $this->normalize($html, $config, $context);
-
-        $cursor = 0; // our location in the text
-        $inside_tag = false; // whether or not we're parsing the inside of a tag
-        $array = array(); // result array
-
-        // This is also treated to mean maintain *column* numbers too
-        $maintain_line_numbers = $config->get('Core.MaintainLineNumbers');
-
-        if ($maintain_line_numbers === null) {
-            // automatically determine line numbering by checking
-            // if error collection is on
-            $maintain_line_numbers = $config->get('Core.CollectErrors');
-        }
-
-        if ($maintain_line_numbers) {
-            $current_line = 1;
-            $current_col  = 0;
-            $length = strlen($html);
-        } else {
-            $current_line = false;
-            $current_col  = false;
-            $length = false;
-        }
-        $context->register('CurrentLine', $current_line);
-        $context->register('CurrentCol',  $current_col);
-        $nl = "\n";
-        // how often to manually recalculate. This will ALWAYS be right,
-        // but it's pretty wasteful. Set to 0 to turn off
-        $synchronize_interval = $config->get('Core.DirectLexLineNumberSyncInterval');
-
-        $e = false;
-        if ($config->get('Core.CollectErrors')) {
-            $e =& $context->get('ErrorCollector');
-        }
-
-        // for testing synchronization
-        $loops = 0;
-
-        while(++$loops) {
-
-            // $cursor is either at the start of a token, or inside of
-            // a tag (i.e. there was a < immediately before it), as indicated
-            // by $inside_tag
-
-            if ($maintain_line_numbers) {
-
-                // $rcursor, however, is always at the start of a token.
-                $rcursor = $cursor - (int) $inside_tag;
-
-                // Column number is cheap, so we calculate it every round.
-                // We're interested at the *end* of the newline string, so
-                // we need to add strlen($nl) == 1 to $nl_pos before subtracting it
-                // from our "rcursor" position.
-                $nl_pos = strrpos($html, $nl, $rcursor - $length);
-                $current_col = $rcursor - (is_bool($nl_pos) ? 0 : $nl_pos + 1);
-
-                // recalculate lines
-                if (
-                    $synchronize_interval &&  // synchronization is on
-                    $cursor > 0 &&            // cursor is further than zero
-                    $loops % $synchronize_interval === 0 // time to synchronize!
-                ) {
-                    $current_line = 1 + $this->substrCount($html, $nl, 0, $cursor);
-                }
-
-            }
-
-            $position_next_lt = strpos($html, '<', $cursor);
-            $position_next_gt = strpos($html, '>', $cursor);
-
-            // triggers on "<b>asdf</b>" but not "asdf <b></b>"
-            // special case to set up context
-            if ($position_next_lt === $cursor) {
-                $inside_tag = true;
-                $cursor++;
-            }
-
-            if (!$inside_tag && $position_next_lt !== false) {
-                // We are not inside tag and there still is another tag to parse
-                $token = new
-                    HTMLPurifier_Token_Text(
-                        $this->parseData(
-                            substr(
-                                $html, $cursor, $position_next_lt - $cursor
-                            )
-                        )
-                    );
-                if ($maintain_line_numbers) {
-                    $token->rawPosition($current_line, $current_col);
-                    $current_line += $this->substrCount($html, $nl, $cursor, $position_next_lt - $cursor);
-                }
-                $array[] = $token;
-                $cursor  = $position_next_lt + 1;
-                $inside_tag = true;
-                continue;
-            } elseif (!$inside_tag) {
-                // We are not inside tag but there are no more tags
-                // If we're already at the end, break
-                if ($cursor === strlen($html)) break;
-                // Create Text of rest of string
-                $token = new
-                    HTMLPurifier_Token_Text(
-                        $this->parseData(
-                            substr(
-                                $html, $cursor
-                            )
-                        )
-                    );
-                if ($maintain_line_numbers) $token->rawPosition($current_line, $current_col);
-                $array[] = $token;
-                break;
-            } elseif ($inside_tag && $position_next_gt !== false) {
-                // We are in tag and it is well formed
-                // Grab the internals of the tag
-                $strlen_segment = $position_next_gt - $cursor;
-
-                if ($strlen_segment < 1) {
-                    // there's nothing to process!
-                    $token = new HTMLPurifier_Token_Text('<');
-                    $cursor++;
-                    continue;
-                }
-
-                $segment = substr($html, $cursor, $strlen_segment);
-
-                if ($segment === false) {
-                    // somehow, we attempted to access beyond the end of
-                    // the string, defense-in-depth, reported by Nate Abele
-                    break;
-                }
-
-                // Check if it's a comment
-                if (
-                    substr($segment, 0, 3) === '!--'
-                ) {
-                    // re-determine segment length, looking for -->
-                    $position_comment_end = strpos($html, '-->', $cursor);
-                    if ($position_comment_end === false) {
-                        // uh oh, we have a comment that extends to
-                        // infinity. Can't be helped: set comment
-                        // end position to end of string
-                        if ($e) $e->send(E_WARNING, 'Lexer: Unclosed comment');
-                        $position_comment_end = strlen($html);
-                        $end = true;
-                    } else {
-                        $end = false;
-                    }
-                    $strlen_segment = $position_comment_end - $cursor;
-                    $segment = substr($html, $cursor, $strlen_segment);
-                    $token = new
-                        HTMLPurifier_Token_Comment(
-                            substr(
-                                $segment, 3, $strlen_segment - 3
-                            )
-                        );
-                    if ($maintain_line_numbers) {
-                        $token->rawPosition($current_line, $current_col);
-                        $current_line += $this->substrCount($html, $nl, $cursor, $strlen_segment);
-                    }
-                    $array[] = $token;
-                    $cursor = $end ? $position_comment_end : $position_comment_end + 3;
-                    $inside_tag = false;
-                    continue;
-                }
-
-                // Check if it's an end tag
-                $is_end_tag = (strpos($segment,'/') === 0);
-                if ($is_end_tag) {
-                    $type = substr($segment, 1);
-                    $token = new HTMLPurifier_Token_End($type);
-                    if ($maintain_line_numbers) {
-                        $token->rawPosition($current_line, $current_col);
-                        $current_line += $this->substrCount($html, $nl, $cursor, $position_next_gt - $cursor);
-                    }
-                    $array[] = $token;
-                    $inside_tag = false;
-                    $cursor = $position_next_gt + 1;
-                    continue;
-                }
-
-                // Check leading character is alnum, if not, we may
-                // have accidently grabbed an emoticon. Translate into
-                // text and go our merry way
-                if (!ctype_alpha($segment[0])) {
-                    // XML:  $segment[0] !== '_' && $segment[0] !== ':'
-                    if ($e) $e->send(E_NOTICE, 'Lexer: Unescaped lt');
-                    $token = new HTMLPurifier_Token_Text('<');
-                    if ($maintain_line_numbers) {
-                        $token->rawPosition($current_line, $current_col);
-                        $current_line += $this->substrCount($html, $nl, $cursor, $position_next_gt - $cursor);
-                    }
-                    $array[] = $token;
-                    $inside_tag = false;
-                    continue;
-                }
-
-                // Check if it is explicitly self closing, if so, remove
-                // trailing slash. Remember, we could have a tag like <br>, so
-                // any later token processing scripts must convert improperly
-                // classified EmptyTags from StartTags.
-                $is_self_closing = (strrpos($segment,'/') === $strlen_segment-1);
-                if ($is_self_closing) {
-                    $strlen_segment--;
-                    $segment = substr($segment, 0, $strlen_segment);
-                }
-
-                // Check if there are any attributes
-                $position_first_space = strcspn($segment, $this->_whitespace);
-
-                if ($position_first_space >= $strlen_segment) {
-                    if ($is_self_closing) {
-                        $token = new HTMLPurifier_Token_Empty($segment);
-                    } else {
-                        $token = new HTMLPurifier_Token_Start($segment);
-                    }
-                    if ($maintain_line_numbers) {
-                        $token->rawPosition($current_line, $current_col);
-                        $current_line += $this->substrCount($html, $nl, $cursor, $position_next_gt - $cursor);
-                    }
-                    $array[] = $token;
-                    $inside_tag = false;
-                    $cursor = $position_next_gt + 1;
-                    continue;
-                }
-
-                // Grab out all the data
-                $type = substr($segment, 0, $position_first_space);
-                $attribute_string =
-                    trim(
-                        substr(
-                            $segment, $position_first_space
-                        )
-                    );
-                if ($attribute_string) {
-                    $attr = $this->parseAttributeString(
-                                    $attribute_string
-                                  , $config, $context
-                              );
-                } else {
-                    $attr = array();
-                }
-
-                if ($is_self_closing) {
-                    $token = new HTMLPurifier_Token_Empty($type, $attr);
-                } else {
-                    $token = new HTMLPurifier_Token_Start($type, $attr);
-                }
-                if ($maintain_line_numbers) {
-                    $token->rawPosition($current_line, $current_col);
-                    $current_line += $this->substrCount($html, $nl, $cursor, $position_next_gt - $cursor);
-                }
-                $array[] = $token;
-                $cursor = $position_next_gt + 1;
-                $inside_tag = false;
-                continue;
-            } else {
-                // inside tag, but there's no ending > sign
-                if ($e) $e->send(E_WARNING, 'Lexer: Missing gt');
-                $token = new
-                    HTMLPurifier_Token_Text(
-                        '<' .
-                        $this->parseData(
-                            substr($html, $cursor)
-                        )
-                    );
-                if ($maintain_line_numbers) $token->rawPosition($current_line, $current_col);
-                // no cursor scroll? Hmm...
-                $array[] = $token;
-                break;
-            }
-            break;
-        }
-
-        $context->destroy('CurrentLine');
-        $context->destroy('CurrentCol');
-        return $array;
-    }
-
-    /**
-     * PHP 5.0.x compatible substr_count that implements offset and length
-     */
-    protected function substrCount($haystack, $needle, $offset, $length) {
-        static $oldVersion;
-        if ($oldVersion === null) {
-            $oldVersion = version_compare(PHP_VERSION, '5.1', '<');
-        }
-        if ($oldVersion) {
-            $haystack = substr($haystack, $offset, $length);
-            return substr_count($haystack, $needle);
-        } else {
-            return substr_count($haystack, $needle, $offset, $length);
-        }
-    }
-
-    /**
-     * Takes the inside of an HTML tag and makes an assoc array of attributes.
-     *
-     * @param $string Inside of tag excluding name.
-     * @returns Assoc array of attributes.
-     */
-    public function parseAttributeString($string, $config, $context) {
-        $string = (string) $string; // quick typecast
-
-        if ($string == '') return array(); // no attributes
-
-        $e = false;
-        if ($config->get('Core.CollectErrors')) {
-            $e =& $context->get('ErrorCollector');
-        }
-
-        // let's see if we can abort as quickly as possible
-        // one equal sign, no spaces => one attribute
-        $num_equal = substr_count($string, '=');
-        $has_space = strpos($string, ' ');
-        if ($num_equal === 0 && !$has_space) {
-            // bool attribute
-            return array($string => $string);
-        } elseif ($num_equal === 1 && !$has_space) {
-            // only one attribute
-            list($key, $quoted_value) = explode('=', $string);
-            $quoted_value = trim($quoted_value);
-            if (!$key) {
-                if ($e) $e->send(E_ERROR, 'Lexer: Missing attribute key');
-                return array();
-            }
-            if (!$quoted_value) return array($key => '');
-            $first_char = @$quoted_value[0];
-            $last_char  = @$quoted_value[strlen($quoted_value)-1];
-
-            $same_quote = ($first_char == $last_char);
-            $open_quote = ($first_char == '"' || $first_char == "'");
-
-            if ( $same_quote && $open_quote) {
-                // well behaved
-                $value = substr($quoted_value, 1, strlen($quoted_value) - 2);
-            } else {
-                // not well behaved
-                if ($open_quote) {
-                    if ($e) $e->send(E_ERROR, 'Lexer: Missing end quote');
-                    $value = substr($quoted_value, 1);
-                } else {
-                    $value = $quoted_value;
-                }
-            }
-            if ($value === false) $value = '';
-            return array($key => $value);
-        }
-
-        // setup loop environment
-        $array  = array(); // return assoc array of attributes
-        $cursor = 0; // current position in string (moves forward)
-        $size   = strlen($string); // size of the string (stays the same)
-
-        // if we have unquoted attributes, the parser expects a terminating
-        // space, so let's guarantee that there's always a terminating space.
-        $string .= ' ';
-
-        while(true) {
-
-            if ($cursor >= $size) {
-                break;
-            }
-
-            $cursor += ($value = strspn($string, $this->_whitespace, $cursor));
-            // grab the key
-
-            $key_begin = $cursor; //we're currently at the start of the key
-
-            // scroll past all characters that are the key (not whitespace or =)
-            $cursor += strcspn($string, $this->_whitespace . '=', $cursor);
-
-            $key_end = $cursor; // now at the end of the key
-
-            $key = substr($string, $key_begin, $key_end - $key_begin);
-
-            if (!$key) {
-                if ($e) $e->send(E_ERROR, 'Lexer: Missing attribute key');
-                $cursor += strcspn($string, $this->_whitespace, $cursor + 1); // prevent infinite loop
-                continue; // empty key
-            }
-
-            // scroll past all whitespace
-            $cursor += strspn($string, $this->_whitespace, $cursor);
-
-            if ($cursor >= $size) {
-                $array[$key] = $key;
-                break;
-            }
-
-            // if the next character is an equal sign, we've got a regular
-            // pair, otherwise, it's a bool attribute
-            $first_char = @$string[$cursor];
-
-            if ($first_char == '=') {
-                // key="value"
-
-                $cursor++;
-                $cursor += strspn($string, $this->_whitespace, $cursor);
-
-                if ($cursor === false) {
-                    $array[$key] = '';
-                    break;
-                }
-
-                // we might be in front of a quote right now
-
-                $char = @$string[$cursor];
-
-                if ($char == '"' || $char == "'") {
-                    // it's quoted, end bound is $char
-                    $cursor++;
-                    $value_begin = $cursor;
-                    $cursor = strpos($string, $char, $cursor);
-                    $value_end = $cursor;
-                } else {
-                    // it's not quoted, end bound is whitespace
-                    $value_begin = $cursor;
-                    $cursor += strcspn($string, $this->_whitespace, $cursor);
-                    $value_end = $cursor;
-                }
-
-                // we reached a premature end
-                if ($cursor === false) {
-                    $cursor = $size;
-                    $value_end = $cursor;
-                }
-
-                $value = substr($string, $value_begin, $value_end - $value_begin);
-                if ($value === false) $value = '';
-                $array[$key] = $this->parseData($value);
-                $cursor++;
-
-            } else {
-                // boolattr
-                if ($key !== '') {
-                    $array[$key] = $key;
-                } else {
-                    // purely theoretical
-                    if ($e) $e->send(E_ERROR, 'Lexer: Missing attribute key');
-                }
-
-            }
-        }
-        return $array;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Lexer/PEARSax3.php b/extlib/HTMLPurifier/HTMLPurifier/Lexer/PEARSax3.php
deleted file mode 100644
index 57cffa82ab..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Lexer/PEARSax3.php
+++ /dev/null
@@ -1,106 +0,0 @@
-<?php
-
-/**
- * Proof-of-concept lexer that uses the PEAR package XML_HTMLSax3 to parse HTML.
- *
- * PEAR, not suprisingly, also has a SAX parser for HTML.  I don't know
- * very much about implementation, but it's fairly well written.  However, that
- * abstraction comes at a price: performance. You need to have it installed,
- * and if the API changes, it might break our adapter. Not sure whether or not
- * it's UTF-8 aware, but it has some entity parsing trouble (in all areas,
- * text and attributes).
- *
- * Quite personally, I don't recommend using the PEAR class, and the defaults
- * don't use it. The unit tests do perform the tests on the SAX parser too, but
- * whatever it does for poorly formed HTML is up to it.
- *
- * @todo Generalize so that XML_HTMLSax is also supported.
- *
- * @warning Entity-resolution inside attributes is broken.
- */
-
-class HTMLPurifier_Lexer_PEARSax3 extends HTMLPurifier_Lexer
-{
-
-    /**
-     * Internal accumulator array for SAX parsers.
-     */
-    protected $tokens = array();
-
-    public function tokenizeHTML($string, $config, $context) {
-
-        $this->tokens = array();
-
-        $string = $this->normalize($string, $config, $context);
-
-        $parser = new XML_HTMLSax3();
-        $parser->set_object($this);
-        $parser->set_element_handler('openHandler','closeHandler');
-        $parser->set_data_handler('dataHandler');
-        $parser->set_escape_handler('escapeHandler');
-
-        // doesn't seem to work correctly for attributes
-        $parser->set_option('XML_OPTION_ENTITIES_PARSED', 1);
-
-        $parser->parse($string);
-
-        return $this->tokens;
-
-    }
-
-    /**
-     * Open tag event handler, interface is defined by PEAR package.
-     */
-    public function openHandler(&$parser, $name, $attrs, $closed) {
-        // entities are not resolved in attrs
-        foreach ($attrs as $key => $attr) {
-            $attrs[$key] = $this->parseData($attr);
-        }
-        if ($closed) {
-            $this->tokens[] = new HTMLPurifier_Token_Empty($name, $attrs);
-        } else {
-            $this->tokens[] = new HTMLPurifier_Token_Start($name, $attrs);
-        }
-        return true;
-    }
-
-    /**
-     * Close tag event handler, interface is defined by PEAR package.
-     */
-    public function closeHandler(&$parser, $name) {
-        // HTMLSax3 seems to always send empty tags an extra close tag
-        // check and ignore if you see it:
-        // [TESTME] to make sure it doesn't overreach
-        if ($this->tokens[count($this->tokens)-1] instanceof HTMLPurifier_Token_Empty) {
-            return true;
-        }
-        $this->tokens[] = new HTMLPurifier_Token_End($name);
-        return true;
-    }
-
-    /**
-     * Data event handler, interface is defined by PEAR package.
-     */
-    public function dataHandler(&$parser, $data) {
-        $this->tokens[] = new HTMLPurifier_Token_Text($data);
-        return true;
-    }
-
-    /**
-     * Escaped text handler, interface is defined by PEAR package.
-     */
-    public function escapeHandler(&$parser, $data) {
-        if (strpos($data, '--') === 0) {
-            $this->tokens[] = new HTMLPurifier_Token_Comment($data);
-        }
-        // CDATA is handled elsewhere, but if it was handled here:
-        //if (strpos($data, '[CDATA[') === 0) {
-        //    $this->tokens[] = new HTMLPurifier_Token_Text(
-        //        substr($data, 7, strlen($data) - 9) );
-        //}
-        return true;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Lexer/PH5P.php b/extlib/HTMLPurifier/HTMLPurifier/Lexer/PH5P.php
deleted file mode 100644
index fa1bf973e0..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Lexer/PH5P.php
+++ /dev/null
@@ -1,3906 +0,0 @@
-<?php
-
-/**
- * Experimental HTML5-based parser using Jeroen van der Meer's PH5P library.
- * Occupies space in the HTML5 pseudo-namespace, which may cause conflicts.
- * 
- * @note
- *    Recent changes to PHP's DOM extension have resulted in some fatal
- *    error conditions with the original version of PH5P. Pending changes,
- *    this lexer will punt to DirectLex if DOM throughs an exception.
- */
-
-class HTMLPurifier_Lexer_PH5P extends HTMLPurifier_Lexer_DOMLex {
-    
-    public function tokenizeHTML($html, $config, $context) {
-        $new_html = $this->normalize($html, $config, $context);
-        $new_html = $this->wrapHTML($new_html, $config, $context);
-        try {
-            $parser = new HTML5($new_html);
-            $doc = $parser->save();
-        } catch (DOMException $e) {
-            // Uh oh, it failed. Punt to DirectLex.
-            $lexer = new HTMLPurifier_Lexer_DirectLex();
-            $context->register('PH5PError', $e); // save the error, so we can detect it
-            return $lexer->tokenizeHTML($html, $config, $context); // use original HTML
-        }
-        $tokens = array();
-        $this->tokenizeDOM(
-            $doc->getElementsByTagName('html')->item(0)-> // <html>
-                  getElementsByTagName('body')->item(0)-> //   <body>
-                  getElementsByTagName('div')->item(0)    //     <div>
-            , $tokens);
-        return $tokens;
-    }
-    
-}
-
-/*
-
-Copyright 2007 Jeroen van der Meer <http://jero.net/> 
-
-Permission is hereby granted, free of charge, to any person obtaining a 
-copy of this software and associated documentation files (the 
-"Software"), to deal in the Software without restriction, including 
-without limitation the rights to use, copy, modify, merge, publish, 
-distribute, sublicense, and/or sell copies of the Software, and to 
-permit persons to whom the Software is furnished to do so, subject to 
-the following conditions: 
-
-The above copyright notice and this permission notice shall be included 
-in all copies or substantial portions of the Software. 
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
-OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
-IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
-CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
-TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
-SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
-
-*/
-
-class HTML5 {
-    private $data;
-    private $char;
-    private $EOF;
-    private $state;
-    private $tree;
-    private $token;
-    private $content_model;
-    private $escape = false;
-    private $entities = array('AElig;','AElig','AMP;','AMP','Aacute;','Aacute',
-    'Acirc;','Acirc','Agrave;','Agrave','Alpha;','Aring;','Aring','Atilde;',
-    'Atilde','Auml;','Auml','Beta;','COPY;','COPY','Ccedil;','Ccedil','Chi;',
-    'Dagger;','Delta;','ETH;','ETH','Eacute;','Eacute','Ecirc;','Ecirc','Egrave;',
-    'Egrave','Epsilon;','Eta;','Euml;','Euml','GT;','GT','Gamma;','Iacute;',
-    'Iacute','Icirc;','Icirc','Igrave;','Igrave','Iota;','Iuml;','Iuml','Kappa;',
-    'LT;','LT','Lambda;','Mu;','Ntilde;','Ntilde','Nu;','OElig;','Oacute;',
-    'Oacute','Ocirc;','Ocirc','Ograve;','Ograve','Omega;','Omicron;','Oslash;',
-    'Oslash','Otilde;','Otilde','Ouml;','Ouml','Phi;','Pi;','Prime;','Psi;',
-    'QUOT;','QUOT','REG;','REG','Rho;','Scaron;','Sigma;','THORN;','THORN',
-    'TRADE;','Tau;','Theta;','Uacute;','Uacute','Ucirc;','Ucirc','Ugrave;',
-    'Ugrave','Upsilon;','Uuml;','Uuml','Xi;','Yacute;','Yacute','Yuml;','Zeta;',
-    'aacute;','aacute','acirc;','acirc','acute;','acute','aelig;','aelig',
-    'agrave;','agrave','alefsym;','alpha;','amp;','amp','and;','ang;','apos;',
-    'aring;','aring','asymp;','atilde;','atilde','auml;','auml','bdquo;','beta;',
-    'brvbar;','brvbar','bull;','cap;','ccedil;','ccedil','cedil;','cedil',
-    'cent;','cent','chi;','circ;','clubs;','cong;','copy;','copy','crarr;',
-    'cup;','curren;','curren','dArr;','dagger;','darr;','deg;','deg','delta;',
-    'diams;','divide;','divide','eacute;','eacute','ecirc;','ecirc','egrave;',
-    'egrave','empty;','emsp;','ensp;','epsilon;','equiv;','eta;','eth;','eth',
-    'euml;','euml','euro;','exist;','fnof;','forall;','frac12;','frac12',
-    'frac14;','frac14','frac34;','frac34','frasl;','gamma;','ge;','gt;','gt',
-    'hArr;','harr;','hearts;','hellip;','iacute;','iacute','icirc;','icirc',
-    'iexcl;','iexcl','igrave;','igrave','image;','infin;','int;','iota;',
-    'iquest;','iquest','isin;','iuml;','iuml','kappa;','lArr;','lambda;','lang;',
-    'laquo;','laquo','larr;','lceil;','ldquo;','le;','lfloor;','lowast;','loz;',
-    'lrm;','lsaquo;','lsquo;','lt;','lt','macr;','macr','mdash;','micro;','micro',
-    'middot;','middot','minus;','mu;','nabla;','nbsp;','nbsp','ndash;','ne;',
-    'ni;','not;','not','notin;','nsub;','ntilde;','ntilde','nu;','oacute;',
-    'oacute','ocirc;','ocirc','oelig;','ograve;','ograve','oline;','omega;',
-    'omicron;','oplus;','or;','ordf;','ordf','ordm;','ordm','oslash;','oslash',
-    'otilde;','otilde','otimes;','ouml;','ouml','para;','para','part;','permil;',
-    'perp;','phi;','pi;','piv;','plusmn;','plusmn','pound;','pound','prime;',
-    'prod;','prop;','psi;','quot;','quot','rArr;','radic;','rang;','raquo;',
-    'raquo','rarr;','rceil;','rdquo;','real;','reg;','reg','rfloor;','rho;',
-    'rlm;','rsaquo;','rsquo;','sbquo;','scaron;','sdot;','sect;','sect','shy;',
-    'shy','sigma;','sigmaf;','sim;','spades;','sub;','sube;','sum;','sup1;',
-    'sup1','sup2;','sup2','sup3;','sup3','sup;','supe;','szlig;','szlig','tau;',
-    'there4;','theta;','thetasym;','thinsp;','thorn;','thorn','tilde;','times;',
-    'times','trade;','uArr;','uacute;','uacute','uarr;','ucirc;','ucirc',
-    'ugrave;','ugrave','uml;','uml','upsih;','upsilon;','uuml;','uuml','weierp;',
-    'xi;','yacute;','yacute','yen;','yen','yuml;','yuml','zeta;','zwj;','zwnj;');
-
-    const PCDATA    = 0;
-    const RCDATA    = 1;
-    const CDATA     = 2;
-    const PLAINTEXT = 3;
-
-    const DOCTYPE  = 0;
-    const STARTTAG = 1;
-    const ENDTAG   = 2;
-    const COMMENT  = 3;
-    const CHARACTR = 4;
-    const EOF      = 5;
-
-    public function __construct($data) {
-        $data = str_replace("\r\n", "\n", $data);
-        $data = str_replace("\r", null, $data);
-
-        $this->data = $data;
-        $this->char = -1;
-        $this->EOF  = strlen($data);
-        $this->tree = new HTML5TreeConstructer;
-        $this->content_model = self::PCDATA;
-
-        $this->state = 'data';
-
-        while($this->state !== null) {
-            $this->{$this->state.'State'}();
-        }
-    }
-
-    public function save() {
-        return $this->tree->save();
-    }
-
-    private function char() {
-        return ($this->char < $this->EOF)
-            ? $this->data[$this->char]
-            : false;
-    }
-
-    private function character($s, $l = 0) {
-        if($s + $l < $this->EOF) {
-            if($l === 0) {
-                return $this->data[$s];
-            } else {
-                return substr($this->data, $s, $l);
-            }
-        }
-    }
-
-    private function characters($char_class, $start) {
-        return preg_replace('#^(['.$char_class.']+).*#s', '\\1', substr($this->data, $start));
-    }
-
-    private function dataState() {
-        // Consume the next input character
-        $this->char++;
-        $char = $this->char();
-
-        if($char === '&' && ($this->content_model === self::PCDATA || $this->content_model === self::RCDATA)) {
-            /* U+0026 AMPERSAND (&)
-            When the content model flag is set to one of the PCDATA or RCDATA
-            states: switch to the entity data state. Otherwise: treat it as per
-            the "anything else"    entry below. */
-            $this->state = 'entityData';
-
-        } elseif($char === '-') {
-            /* If the content model flag is set to either the RCDATA state or
-            the CDATA state, and the escape flag is false, and there are at
-            least three characters before this one in the input stream, and the
-            last four characters in the input stream, including this one, are
-            U+003C LESS-THAN SIGN, U+0021 EXCLAMATION MARK, U+002D HYPHEN-MINUS,
-            and U+002D HYPHEN-MINUS ("<!--"), then set the escape flag to true. */
-            if(($this->content_model === self::RCDATA || $this->content_model ===
-            self::CDATA) && $this->escape === false &&
-            $this->char >= 3 && $this->character($this->char - 4, 4) === '<!--') {
-                $this->escape = true;
-            }
-
-            /* In any case, emit the input character as a character token. Stay
-            in the data state. */
-            $this->emitToken(array(
-                'type' => self::CHARACTR,
-                'data' => $char
-            ));
-
-        /* U+003C LESS-THAN SIGN (<) */
-        } elseif($char === '<' && ($this->content_model === self::PCDATA ||
-        (($this->content_model === self::RCDATA ||
-        $this->content_model === self::CDATA) && $this->escape === false))) {
-            /* When the content model flag is set to the PCDATA state: switch
-            to the tag open state.
-
-            When the content model flag is set to either the RCDATA state or
-            the CDATA state and the escape flag is false: switch to the tag
-            open state.
-
-            Otherwise: treat it as per the "anything else" entry below. */
-            $this->state = 'tagOpen';
-
-        /* U+003E GREATER-THAN SIGN (>) */
-        } elseif($char === '>') {
-            /* If the content model flag is set to either the RCDATA state or
-            the CDATA state, and the escape flag is true, and the last three
-            characters in the input stream including this one are U+002D
-            HYPHEN-MINUS, U+002D HYPHEN-MINUS, U+003E GREATER-THAN SIGN ("-->"),
-            set the escape flag to false. */
-            if(($this->content_model === self::RCDATA ||
-            $this->content_model === self::CDATA) && $this->escape === true &&
-            $this->character($this->char, 3) === '-->') {
-                $this->escape = false;
-            }
-
-            /* In any case, emit the input character as a character token.
-            Stay in the data state. */
-            $this->emitToken(array(
-                'type' => self::CHARACTR,
-                'data' => $char
-            ));
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Emit an end-of-file token. */
-            $this->EOF();
-
-        } elseif($this->content_model === self::PLAINTEXT) {
-            /* When the content model flag is set to the PLAINTEXT state
-            THIS DIFFERS GREATLY FROM THE SPEC: Get the remaining characters of
-            the text and emit it as a character token. */
-            $this->emitToken(array(
-                'type' => self::CHARACTR,
-                'data' => substr($this->data, $this->char)
-            ));
-
-            $this->EOF();
-
-        } else {
-            /* Anything else
-            THIS DIFFERS GREATLY FROM THE SPEC: Get as many character that
-            otherwise would also be treated as a character token and emit it
-            as a single character token. Stay in the data state. */
-            $len  = strcspn($this->data, '<&', $this->char);
-            $char = substr($this->data, $this->char, $len);
-            $this->char += $len - 1;
-
-            $this->emitToken(array(
-                'type' => self::CHARACTR,
-                'data' => $char
-            ));
-
-            $this->state = 'data';
-        }
-    }
-
-    private function entityDataState() {
-        // Attempt to consume an entity.
-        $entity = $this->entity();
-
-        // If nothing is returned, emit a U+0026 AMPERSAND character token.
-        // Otherwise, emit the character token that was returned.
-        $char = (!$entity) ? '&' : $entity;
-        $this->emitToken(array(
-            'type' => self::CHARACTR,
-            'data' => $char
-        ));
-
-        // Finally, switch to the data state.
-        $this->state = 'data';
-    }
-
-    private function tagOpenState() {
-        switch($this->content_model) {
-            case self::RCDATA:
-            case self::CDATA:
-                /* If the next input character is a U+002F SOLIDUS (/) character,
-                consume it and switch to the close tag open state. If the next
-                input character is not a U+002F SOLIDUS (/) character, emit a
-                U+003C LESS-THAN SIGN character token and switch to the data
-                state to process the next input character. */
-                if($this->character($this->char + 1) === '/') {
-                    $this->char++;
-                    $this->state = 'closeTagOpen';
-
-                } else {
-                    $this->emitToken(array(
-                        'type' => self::CHARACTR,
-                        'data' => '<'
-                    ));
-
-                    $this->state = 'data';
-                }
-            break;
-
-            case self::PCDATA:
-                // If the content model flag is set to the PCDATA state
-                // Consume the next input character:
-                $this->char++;
-                $char = $this->char();
-
-                if($char === '!') {
-                    /* U+0021 EXCLAMATION MARK (!)
-                    Switch to the markup declaration open state. */
-                    $this->state = 'markupDeclarationOpen';
-
-                } elseif($char === '/') {
-                    /* U+002F SOLIDUS (/)
-                    Switch to the close tag open state. */
-                    $this->state = 'closeTagOpen';
-
-                } elseif(preg_match('/^[A-Za-z]$/', $char)) {
-                    /* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z
-                    Create a new start tag token, set its tag name to the lowercase
-                    version of the input character (add 0x0020 to the character's code
-                    point), then switch to the tag name state. (Don't emit the token
-                    yet; further details will be filled in before it is emitted.) */
-                    $this->token = array(
-                        'name'  => strtolower($char),
-                        'type'  => self::STARTTAG,
-                        'attr'  => array()
-                    );
-
-                    $this->state = 'tagName';
-
-                } elseif($char === '>') {
-                    /* U+003E GREATER-THAN SIGN (>)
-                    Parse error. Emit a U+003C LESS-THAN SIGN character token and a
-                    U+003E GREATER-THAN SIGN character token. Switch to the data state. */
-                    $this->emitToken(array(
-                        'type' => self::CHARACTR,
-                        'data' => '<>'
-                    ));
-
-                    $this->state = 'data';
-
-                } elseif($char === '?') {
-                    /* U+003F QUESTION MARK (?)
-                    Parse error. Switch to the bogus comment state. */
-                    $this->state = 'bogusComment';
-
-                } else {
-                    /* Anything else
-                    Parse error. Emit a U+003C LESS-THAN SIGN character token and
-                    reconsume the current input character in the data state. */
-                    $this->emitToken(array(
-                        'type' => self::CHARACTR,
-                        'data' => '<'
-                    ));
-
-                    $this->char--;
-                    $this->state = 'data';
-                }
-            break;
-        }
-    }
-
-    private function closeTagOpenState() {
-        $next_node = strtolower($this->characters('A-Za-z', $this->char + 1));
-        $the_same = count($this->tree->stack) > 0 && $next_node === end($this->tree->stack)->nodeName;
-
-        if(($this->content_model === self::RCDATA || $this->content_model === self::CDATA) &&
-        (!$the_same || ($the_same && (!preg_match('/[\t\n\x0b\x0c >\/]/',
-        $this->character($this->char + 1 + strlen($next_node))) || $this->EOF === $this->char)))) {
-            /* If the content model flag is set to the RCDATA or CDATA states then
-            examine the next few characters. If they do not match the tag name of
-            the last start tag token emitted (case insensitively), or if they do but
-            they are not immediately followed by one of the following characters:
-                * U+0009 CHARACTER TABULATION
-                * U+000A LINE FEED (LF)
-                * U+000B LINE TABULATION
-                * U+000C FORM FEED (FF)
-                * U+0020 SPACE
-                * U+003E GREATER-THAN SIGN (>)
-                * U+002F SOLIDUS (/)
-                * EOF
-            ...then there is a parse error. Emit a U+003C LESS-THAN SIGN character
-            token, a U+002F SOLIDUS character token, and switch to the data state
-            to process the next input character. */
-            $this->emitToken(array(
-                'type' => self::CHARACTR,
-                'data' => '</'
-            ));
-
-            $this->state = 'data';
-
-        } else {
-            /* Otherwise, if the content model flag is set to the PCDATA state,
-            or if the next few characters do match that tag name, consume the
-            next input character: */
-            $this->char++;
-            $char = $this->char();
-
-            if(preg_match('/^[A-Za-z]$/', $char)) {
-                /* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z
-                Create a new end tag token, set its tag name to the lowercase version
-                of the input character (add 0x0020 to the character's code point), then
-                switch to the tag name state. (Don't emit the token yet; further details
-                will be filled in before it is emitted.) */
-                $this->token = array(
-                    'name'  => strtolower($char),
-                    'type'  => self::ENDTAG
-                );
-
-                $this->state = 'tagName';
-
-            } elseif($char === '>') {
-                /* U+003E GREATER-THAN SIGN (>)
-                Parse error. Switch to the data state. */
-                $this->state = 'data';
-
-            } elseif($this->char === $this->EOF) {
-                /* EOF
-                Parse error. Emit a U+003C LESS-THAN SIGN character token and a U+002F
-                SOLIDUS character token. Reconsume the EOF character in the data state. */
-                $this->emitToken(array(
-                    'type' => self::CHARACTR,
-                    'data' => '</'
-                ));
-
-                $this->char--;
-                $this->state = 'data';
-
-            } else {
-                /* Parse error. Switch to the bogus comment state. */
-                $this->state = 'bogusComment';
-            }
-        }
-    }
-
-    private function tagNameState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            /* U+0009 CHARACTER TABULATION
-            U+000A LINE FEED (LF)
-            U+000B LINE TABULATION
-            U+000C FORM FEED (FF)
-            U+0020 SPACE
-            Switch to the before attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($char === '>') {
-            /* U+003E GREATER-THAN SIGN (>)
-            Emit the current tag token. Switch to the data state. */
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Parse error. Emit the current tag token. Reconsume the EOF
-            character in the data state. */
-            $this->emitToken($this->token);
-
-            $this->char--;
-            $this->state = 'data';
-
-        } elseif($char === '/') {
-            /* U+002F SOLIDUS (/)
-            Parse error unless this is a permitted slash. Switch to the before
-            attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } else {
-            /* Anything else
-            Append the current input character to the current tag token's tag name.
-            Stay in the tag name state. */
-            $this->token['name'] .= strtolower($char);
-            $this->state = 'tagName';
-        }
-    }
-
-    private function beforeAttributeNameState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            /* U+0009 CHARACTER TABULATION
-            U+000A LINE FEED (LF)
-            U+000B LINE TABULATION
-            U+000C FORM FEED (FF)
-            U+0020 SPACE
-            Stay in the before attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($char === '>') {
-            /* U+003E GREATER-THAN SIGN (>)
-            Emit the current tag token. Switch to the data state. */
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($char === '/') {
-            /* U+002F SOLIDUS (/)
-            Parse error unless this is a permitted slash. Stay in the before
-            attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Parse error. Emit the current tag token. Reconsume the EOF
-            character in the data state. */
-            $this->emitToken($this->token);
-
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Start a new attribute in the current tag token. Set that attribute's
-            name to the current input character, and its value to the empty string.
-            Switch to the attribute name state. */
-            $this->token['attr'][] = array(
-                'name'  => strtolower($char),
-                'value' => null
-            );
-
-            $this->state = 'attributeName';
-        }
-    }
-
-    private function attributeNameState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            /* U+0009 CHARACTER TABULATION
-            U+000A LINE FEED (LF)
-            U+000B LINE TABULATION
-            U+000C FORM FEED (FF)
-            U+0020 SPACE
-            Stay in the before attribute name state. */
-            $this->state = 'afterAttributeName';
-
-        } elseif($char === '=') {
-            /* U+003D EQUALS SIGN (=)
-            Switch to the before attribute value state. */
-            $this->state = 'beforeAttributeValue';
-
-        } elseif($char === '>') {
-            /* U+003E GREATER-THAN SIGN (>)
-            Emit the current tag token. Switch to the data state. */
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($char === '/' && $this->character($this->char + 1) !== '>') {
-            /* U+002F SOLIDUS (/)
-            Parse error unless this is a permitted slash. Switch to the before
-            attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Parse error. Emit the current tag token. Reconsume the EOF
-            character in the data state. */
-            $this->emitToken($this->token);
-
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Append the current input character to the current attribute's name.
-            Stay in the attribute name state. */
-            $last = count($this->token['attr']) - 1;
-            $this->token['attr'][$last]['name'] .= strtolower($char);
-
-            $this->state = 'attributeName';
-        }
-    }
-
-    private function afterAttributeNameState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            /* U+0009 CHARACTER TABULATION
-            U+000A LINE FEED (LF)
-            U+000B LINE TABULATION
-            U+000C FORM FEED (FF)
-            U+0020 SPACE
-            Stay in the after attribute name state. */
-            $this->state = 'afterAttributeName';
-
-        } elseif($char === '=') {
-            /* U+003D EQUALS SIGN (=)
-            Switch to the before attribute value state. */
-            $this->state = 'beforeAttributeValue';
-
-        } elseif($char === '>') {
-            /* U+003E GREATER-THAN SIGN (>)
-            Emit the current tag token. Switch to the data state. */
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($char === '/' && $this->character($this->char + 1) !== '>') {
-            /* U+002F SOLIDUS (/)
-            Parse error unless this is a permitted slash. Switch to the
-            before attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Parse error. Emit the current tag token. Reconsume the EOF
-            character in the data state. */
-            $this->emitToken($this->token);
-
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Start a new attribute in the current tag token. Set that attribute's
-            name to the current input character, and its value to the empty string.
-            Switch to the attribute name state. */
-            $this->token['attr'][] = array(
-                'name'  => strtolower($char),
-                'value' => null
-            );
-
-            $this->state = 'attributeName';
-        }
-    }
-
-    private function beforeAttributeValueState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            /* U+0009 CHARACTER TABULATION
-            U+000A LINE FEED (LF)
-            U+000B LINE TABULATION
-            U+000C FORM FEED (FF)
-            U+0020 SPACE
-            Stay in the before attribute value state. */
-            $this->state = 'beforeAttributeValue';
-
-        } elseif($char === '"') {
-            /* U+0022 QUOTATION MARK (")
-            Switch to the attribute value (double-quoted) state. */
-            $this->state = 'attributeValueDoubleQuoted';
-
-        } elseif($char === '&') {
-            /* U+0026 AMPERSAND (&)
-            Switch to the attribute value (unquoted) state and reconsume
-            this input character. */
-            $this->char--;
-            $this->state = 'attributeValueUnquoted';
-
-        } elseif($char === '\'') {
-            /* U+0027 APOSTROPHE (')
-            Switch to the attribute value (single-quoted) state. */
-            $this->state = 'attributeValueSingleQuoted';
-
-        } elseif($char === '>') {
-            /* U+003E GREATER-THAN SIGN (>)
-            Emit the current tag token. Switch to the data state. */
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Append the current input character to the current attribute's value.
-            Switch to the attribute value (unquoted) state. */
-            $last = count($this->token['attr']) - 1;
-            $this->token['attr'][$last]['value'] .= $char;
-
-            $this->state = 'attributeValueUnquoted';
-        }
-    }
-
-    private function attributeValueDoubleQuotedState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if($char === '"') {
-            /* U+0022 QUOTATION MARK (")
-            Switch to the before attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($char === '&') {
-            /* U+0026 AMPERSAND (&)
-            Switch to the entity in attribute value state. */
-            $this->entityInAttributeValueState('double');
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Parse error. Emit the current tag token. Reconsume the character
-            in the data state. */
-            $this->emitToken($this->token);
-
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Append the current input character to the current attribute's value.
-            Stay in the attribute value (double-quoted) state. */
-            $last = count($this->token['attr']) - 1;
-            $this->token['attr'][$last]['value'] .= $char;
-
-            $this->state = 'attributeValueDoubleQuoted';
-        }
-    }
-
-    private function attributeValueSingleQuotedState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if($char === '\'') {
-            /* U+0022 QUOTATION MARK (')
-            Switch to the before attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($char === '&') {
-            /* U+0026 AMPERSAND (&)
-            Switch to the entity in attribute value state. */
-            $this->entityInAttributeValueState('single');
-
-        } elseif($this->char === $this->EOF) {
-            /* EOF
-            Parse error. Emit the current tag token. Reconsume the character
-            in the data state. */
-            $this->emitToken($this->token);
-
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Append the current input character to the current attribute's value.
-            Stay in the attribute value (single-quoted) state. */
-            $last = count($this->token['attr']) - 1;
-            $this->token['attr'][$last]['value'] .= $char;
-
-            $this->state = 'attributeValueSingleQuoted';
-        }
-    }
-
-    private function attributeValueUnquotedState() {
-        // Consume the next input character:
-        $this->char++;
-        $char = $this->character($this->char);
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            /* U+0009 CHARACTER TABULATION
-            U+000A LINE FEED (LF)
-            U+000B LINE TABULATION
-            U+000C FORM FEED (FF)
-            U+0020 SPACE
-            Switch to the before attribute name state. */
-            $this->state = 'beforeAttributeName';
-
-        } elseif($char === '&') {
-            /* U+0026 AMPERSAND (&)
-            Switch to the entity in attribute value state. */
-            $this->entityInAttributeValueState();
-
-        } elseif($char === '>') {
-            /* U+003E GREATER-THAN SIGN (>)
-            Emit the current tag token. Switch to the data state. */
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } else {
-            /* Anything else
-            Append the current input character to the current attribute's value.
-            Stay in the attribute value (unquoted) state. */
-            $last = count($this->token['attr']) - 1;
-            $this->token['attr'][$last]['value'] .= $char;
-
-            $this->state = 'attributeValueUnquoted';
-        }
-    }
-
-    private function entityInAttributeValueState() {
-        // Attempt to consume an entity.
-        $entity = $this->entity();
-
-        // If nothing is returned, append a U+0026 AMPERSAND character to the
-        // current attribute's value. Otherwise, emit the character token that
-        // was returned.
-        $char = (!$entity)
-            ? '&'
-            : $entity;
-
-        $last = count($this->token['attr']) - 1;
-        $this->token['attr'][$last]['value'] .= $char;
-    }
-
-    private function bogusCommentState() {
-        /* Consume every character up to the first U+003E GREATER-THAN SIGN
-        character (>) or the end of the file (EOF), whichever comes first. Emit
-        a comment token whose data is the concatenation of all the characters
-        starting from and including the character that caused the state machine
-        to switch into the bogus comment state, up to and including the last
-        consumed character before the U+003E character, if any, or up to the
-        end of the file otherwise. (If the comment was started by the end of
-        the file (EOF), the token is empty.) */
-        $data = $this->characters('^>', $this->char);
-        $this->emitToken(array(
-            'data' => $data,
-            'type' => self::COMMENT
-        ));
-
-        $this->char += strlen($data);
-
-        /* Switch to the data state. */
-        $this->state = 'data';
-
-        /* If the end of the file was reached, reconsume the EOF character. */
-        if($this->char === $this->EOF) {
-            $this->char = $this->EOF - 1;
-        }
-    }
-
-    private function markupDeclarationOpenState() {
-        /* If the next two characters are both U+002D HYPHEN-MINUS (-)
-        characters, consume those two characters, create a comment token whose
-        data is the empty string, and switch to the comment state. */
-        if($this->character($this->char + 1, 2) === '--') {
-            $this->char += 2;
-            $this->state = 'comment';
-            $this->token = array(
-                'data' => null,
-                'type' => self::COMMENT
-            );
-
-        /* Otherwise if the next seven chacacters are a case-insensitive match
-        for the word "DOCTYPE", then consume those characters and switch to the
-        DOCTYPE state. */
-        } elseif(strtolower($this->character($this->char + 1, 7)) === 'doctype') {
-            $this->char += 7;
-            $this->state = 'doctype';
-
-        /* Otherwise, is is a parse error. Switch to the bogus comment state.
-        The next character that is consumed, if any, is the first character
-        that will be in the comment. */
-        } else {
-            $this->char++;
-            $this->state = 'bogusComment';
-        }
-    }
-
-    private function commentState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        /* U+002D HYPHEN-MINUS (-) */
-        if($char === '-') {
-            /* Switch to the comment dash state  */
-            $this->state = 'commentDash';
-
-        /* EOF */
-        } elseif($this->char === $this->EOF) {
-            /* Parse error. Emit the comment token. Reconsume the EOF character
-            in the data state. */
-            $this->emitToken($this->token);
-            $this->char--;
-            $this->state = 'data';
-
-        /* Anything else */
-        } else {
-            /* Append the input character to the comment token's data. Stay in
-            the comment state. */
-            $this->token['data'] .= $char;
-        }
-    }
-
-    private function commentDashState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        /* U+002D HYPHEN-MINUS (-) */
-        if($char === '-') {
-            /* Switch to the comment end state  */
-            $this->state = 'commentEnd';
-
-        /* EOF */
-        } elseif($this->char === $this->EOF) {
-            /* Parse error. Emit the comment token. Reconsume the EOF character
-            in the data state. */
-            $this->emitToken($this->token);
-            $this->char--;
-            $this->state = 'data';
-
-        /* Anything else */
-        } else {
-            /* Append a U+002D HYPHEN-MINUS (-) character and the input
-            character to the comment token's data. Switch to the comment state. */
-            $this->token['data'] .= '-'.$char;
-            $this->state = 'comment';
-        }
-    }
-
-    private function commentEndState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        if($char === '>') {
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($char === '-') {
-            $this->token['data'] .= '-';
-
-        } elseif($this->char === $this->EOF) {
-            $this->emitToken($this->token);
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            $this->token['data'] .= '--'.$char;
-            $this->state = 'comment';
-        }
-    }
-
-    private function doctypeState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            $this->state = 'beforeDoctypeName';
-
-        } else {
-            $this->char--;
-            $this->state = 'beforeDoctypeName';
-        }
-    }
-
-    private function beforeDoctypeNameState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            // Stay in the before DOCTYPE name state.
-
-        } elseif(preg_match('/^[a-z]$/', $char)) {
-            $this->token = array(
-                'name' => strtoupper($char),
-                'type' => self::DOCTYPE,
-                'error' => true
-            );
-
-            $this->state = 'doctypeName';
-
-        } elseif($char === '>') {
-            $this->emitToken(array(
-                'name' => null,
-                'type' => self::DOCTYPE,
-                'error' => true
-            ));
-
-            $this->state = 'data';
-
-        } elseif($this->char === $this->EOF) {
-            $this->emitToken(array(
-                'name' => null,
-                'type' => self::DOCTYPE,
-                'error' => true
-            ));
-
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            $this->token = array(
-                'name' => $char,
-                'type' => self::DOCTYPE,
-                'error' => true
-            );
-
-            $this->state = 'doctypeName';
-        }
-    }
-
-    private function doctypeNameState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            $this->state = 'AfterDoctypeName';
-
-        } elseif($char === '>') {
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif(preg_match('/^[a-z]$/', $char)) {
-            $this->token['name'] .= strtoupper($char);
-
-        } elseif($this->char === $this->EOF) {
-            $this->emitToken($this->token);
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            $this->token['name'] .= $char;
-        }
-
-        $this->token['error'] = ($this->token['name'] === 'HTML')
-            ? false
-            : true;
-    }
-
-    private function afterDoctypeNameState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
-            // Stay in the DOCTYPE name state.
-
-        } elseif($char === '>') {
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($this->char === $this->EOF) {
-            $this->emitToken($this->token);
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            $this->token['error'] = true;
-            $this->state = 'bogusDoctype';
-        }
-    }
-
-    private function bogusDoctypeState() {
-        /* Consume the next input character: */
-        $this->char++;
-        $char = $this->char();
-
-        if($char === '>') {
-            $this->emitToken($this->token);
-            $this->state = 'data';
-
-        } elseif($this->char === $this->EOF) {
-            $this->emitToken($this->token);
-            $this->char--;
-            $this->state = 'data';
-
-        } else {
-            // Stay in the bogus DOCTYPE state.
-        }
-    }
-
-    private function entity() {
-        $start = $this->char;
-
-        // This section defines how to consume an entity. This definition is
-        // used when parsing entities in text and in attributes.
-
-        // The behaviour depends on the identity of the next character (the
-        // one immediately after the U+0026 AMPERSAND character): 
-
-        switch($this->character($this->char + 1)) {
-            // U+0023 NUMBER SIGN (#)
-            case '#':
-
-                // The behaviour further depends on the character after the
-                // U+0023 NUMBER SIGN:
-                switch($this->character($this->char + 1)) {
-                    // U+0078 LATIN SMALL LETTER X
-                    // U+0058 LATIN CAPITAL LETTER X
-                    case 'x':
-                    case 'X':
-                        // Follow the steps below, but using the range of
-                        // characters U+0030 DIGIT ZERO through to U+0039 DIGIT
-                        // NINE, U+0061 LATIN SMALL LETTER A through to U+0066
-                        // LATIN SMALL LETTER F, and U+0041 LATIN CAPITAL LETTER
-                        // A, through to U+0046 LATIN CAPITAL LETTER F (in other
-                        // words, 0-9, A-F, a-f).
-                        $char = 1;
-                        $char_class = '0-9A-Fa-f';
-                    break;
-
-                    // Anything else
-                    default:
-                        // Follow the steps below, but using the range of
-                        // characters U+0030 DIGIT ZERO through to U+0039 DIGIT
-                        // NINE (i.e. just 0-9).
-                        $char = 0;
-                        $char_class = '0-9';
-                    break;
-                }
-
-                // Consume as many characters as match the range of characters
-                // given above.
-                $this->char++;
-                $e_name = $this->characters($char_class, $this->char + $char + 1);
-                $entity = $this->character($start, $this->char);
-                $cond = strlen($e_name) > 0;
-
-                // The rest of the parsing happens bellow.
-            break;
-
-            // Anything else
-            default:
-                // Consume the maximum number of characters possible, with the
-                // consumed characters case-sensitively matching one of the
-                // identifiers in the first column of the entities table.
-                $e_name = $this->characters('0-9A-Za-z;', $this->char + 1);
-                $len = strlen($e_name);
-
-                for($c = 1; $c <= $len; $c++) {
-                    $id = substr($e_name, 0, $c);
-                    $this->char++;
-
-                    if(in_array($id, $this->entities)) {
-                        if ($e_name[$c-1] !== ';') {
-                            if ($c < $len && $e_name[$c] == ';') {
-                                $this->char++; // consume extra semicolon
-                            }
-                        }
-                        $entity = $id;
-                        break;
-                    }
-                }
-
-                $cond = isset($entity);
-                // The rest of the parsing happens bellow.
-            break;
-        }
-
-        if(!$cond) {
-            // If no match can be made, then this is a parse error. No
-            // characters are consumed, and nothing is returned.
-            $this->char = $start;
-            return false;
-        }
-
-        // Return a character token for the character corresponding to the
-        // entity name (as given by the second column of the entities table).
-        return html_entity_decode('&'.$entity.';', ENT_QUOTES, 'UTF-8');
-    }
-
-    private function emitToken($token) {
-        $emit = $this->tree->emitToken($token);
-
-        if(is_int($emit)) {
-            $this->content_model = $emit;
-
-        } elseif($token['type'] === self::ENDTAG) {
-            $this->content_model = self::PCDATA;
-        }
-    }
-
-    private function EOF() {
-        $this->state = null;
-        $this->tree->emitToken(array(
-            'type' => self::EOF
-        ));
-    }
-}
-
-class HTML5TreeConstructer {
-    public $stack = array();
-
-    private $phase;
-    private $mode;
-    private $dom;
-    private $foster_parent = null;
-    private $a_formatting  = array();
-
-    private $head_pointer = null;
-    private $form_pointer = null;
-
-    private $scoping = array('button','caption','html','marquee','object','table','td','th');
-    private $formatting = array('a','b','big','em','font','i','nobr','s','small','strike','strong','tt','u');
-    private $special = array('address','area','base','basefont','bgsound',
-    'blockquote','body','br','center','col','colgroup','dd','dir','div','dl',
-    'dt','embed','fieldset','form','frame','frameset','h1','h2','h3','h4','h5',
-    'h6','head','hr','iframe','image','img','input','isindex','li','link',
-    'listing','menu','meta','noembed','noframes','noscript','ol','optgroup',
-    'option','p','param','plaintext','pre','script','select','spacer','style',
-    'tbody','textarea','tfoot','thead','title','tr','ul','wbr');
-
-    // The different phases.
-    const INIT_PHASE = 0;
-    const ROOT_PHASE = 1;
-    const MAIN_PHASE = 2;
-    const END_PHASE  = 3;
-
-    // The different insertion modes for the main phase.
-    const BEFOR_HEAD = 0;
-    const IN_HEAD    = 1;
-    const AFTER_HEAD = 2;
-    const IN_BODY    = 3;
-    const IN_TABLE   = 4;
-    const IN_CAPTION = 5;
-    const IN_CGROUP  = 6;
-    const IN_TBODY   = 7;
-    const IN_ROW     = 8;
-    const IN_CELL    = 9;
-    const IN_SELECT  = 10;
-    const AFTER_BODY = 11;
-    const IN_FRAME   = 12;
-    const AFTR_FRAME = 13;
-
-    // The different types of elements.
-    const SPECIAL    = 0;
-    const SCOPING    = 1;
-    const FORMATTING = 2;
-    const PHRASING   = 3;
-
-    const MARKER     = 0;
-
-    public function __construct() {
-        $this->phase = self::INIT_PHASE;
-        $this->mode = self::BEFOR_HEAD;
-        $this->dom = new DOMDocument;
-
-        $this->dom->encoding = 'UTF-8';
-        $this->dom->preserveWhiteSpace = true;
-        $this->dom->substituteEntities = true;
-        $this->dom->strictErrorChecking = false;
-    }
-
-    // Process tag tokens
-    public function emitToken($token) {
-        switch($this->phase) {
-            case self::INIT_PHASE: return $this->initPhase($token); break;
-            case self::ROOT_PHASE: return $this->rootElementPhase($token); break;
-            case self::MAIN_PHASE: return $this->mainPhase($token); break;
-            case self::END_PHASE : return $this->trailingEndPhase($token); break;
-        }
-    }
-
-    private function initPhase($token) {
-        /* Initially, the tree construction stage must handle each token
-        emitted from the tokenisation stage as follows: */
-
-        /* A DOCTYPE token that is marked as being in error
-        A comment token
-        A start tag token
-        An end tag token
-        A character token that is not one of one of U+0009 CHARACTER TABULATION,
-            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-            or U+0020 SPACE
-        An end-of-file token */
-        if((isset($token['error']) && $token['error']) ||
-        $token['type'] === HTML5::COMMENT ||
-        $token['type'] === HTML5::STARTTAG ||
-        $token['type'] === HTML5::ENDTAG ||
-        $token['type'] === HTML5::EOF ||
-        ($token['type'] === HTML5::CHARACTR && isset($token['data']) &&
-        !preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data']))) {
-            /* This specification does not define how to handle this case. In
-            particular, user agents may ignore the entirety of this specification
-            altogether for such documents, and instead invoke special parse modes
-            with a greater emphasis on backwards compatibility. */
-
-            $this->phase = self::ROOT_PHASE;
-            return $this->rootElementPhase($token);
-
-        /* A DOCTYPE token marked as being correct */
-        } elseif(isset($token['error']) && !$token['error']) {
-            /* Append a DocumentType node to the Document  node, with the name
-            attribute set to the name given in the DOCTYPE token (which will be
-            "HTML"), and the other attributes specific to DocumentType objects
-            set to null, empty lists, or the empty string as appropriate. */
-            $doctype = new DOMDocumentType(null, null, 'HTML');
-
-            /* Then, switch to the root element phase of the tree construction
-            stage. */
-            $this->phase = self::ROOT_PHASE;
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        } elseif(isset($token['data']) && preg_match('/^[\t\n\x0b\x0c ]+$/',
-        $token['data'])) {
-            /* Append that character  to the Document node. */
-            $text = $this->dom->createTextNode($token['data']);
-            $this->dom->appendChild($text);
-        }
-    }
-
-    private function rootElementPhase($token) {
-        /* After the initial phase, as each token is emitted from the tokenisation
-        stage, it must be processed as described in this section. */
-
-        /* A DOCTYPE token */
-        if($token['type'] === HTML5::DOCTYPE) {
-            // Parse error. Ignore the token.
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the Document object with the data
-            attribute set to the data given in the comment token. */
-            $comment = $this->dom->createComment($token['data']);
-            $this->dom->appendChild($comment);
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        } elseif($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append that character  to the Document node. */
-            $text = $this->dom->createTextNode($token['data']);
-            $this->dom->appendChild($text);
-
-        /* A character token that is not one of U+0009 CHARACTER TABULATION,
-            U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED
-            (FF), or U+0020 SPACE
-        A start tag token
-        An end tag token
-        An end-of-file token */
-        } elseif(($token['type'] === HTML5::CHARACTR &&
-        !preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) ||
-        $token['type'] === HTML5::STARTTAG ||
-        $token['type'] === HTML5::ENDTAG ||
-        $token['type'] === HTML5::EOF) {
-            /* Create an HTMLElement node with the tag name html, in the HTML
-            namespace. Append it to the Document object. Switch to the main
-            phase and reprocess the current token. */
-            $html = $this->dom->createElement('html');
-            $this->dom->appendChild($html);
-            $this->stack[] = $html;
-
-            $this->phase = self::MAIN_PHASE;
-            return $this->mainPhase($token);
-        }
-    }
-
-    private function mainPhase($token) {
-        /* Tokens in the main phase must be handled as follows: */
-
-        /* A DOCTYPE token */
-        if($token['type'] === HTML5::DOCTYPE) {
-            // Parse error. Ignore the token.
-
-        /* A start tag token with the tag name "html" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'html') {
-            /* If this start tag token was not the first start tag token, then
-            it is a parse error. */
-
-            /* For each attribute on the token, check to see if the attribute
-            is already present on the top element of the stack of open elements.
-            If it is not, add the attribute and its corresponding value to that
-            element. */
-            foreach($token['attr'] as $attr) {
-                if(!$this->stack[0]->hasAttribute($attr['name'])) {
-                    $this->stack[0]->setAttribute($attr['name'], $attr['value']);
-                }
-            }
-
-        /* An end-of-file token */
-        } elseif($token['type'] === HTML5::EOF) {
-            /* Generate implied end tags. */
-            $this->generateImpliedEndTags();
-
-        /* Anything else. */
-        } else {
-            /* Depends on the insertion mode: */
-            switch($this->mode) {
-                case self::BEFOR_HEAD: return $this->beforeHead($token); break;
-                case self::IN_HEAD:    return $this->inHead($token); break;
-                case self::AFTER_HEAD: return $this->afterHead($token); break;
-                case self::IN_BODY:    return $this->inBody($token); break;
-                case self::IN_TABLE:   return $this->inTable($token); break;
-                case self::IN_CAPTION: return $this->inCaption($token); break;
-                case self::IN_CGROUP:  return $this->inColumnGroup($token); break;
-                case self::IN_TBODY:   return $this->inTableBody($token); break;
-                case self::IN_ROW:     return $this->inRow($token); break;
-                case self::IN_CELL:    return $this->inCell($token); break;
-                case self::IN_SELECT:  return $this->inSelect($token); break;
-                case self::AFTER_BODY: return $this->afterBody($token); break;
-                case self::IN_FRAME:   return $this->inFrameset($token); break;
-                case self::AFTR_FRAME: return $this->afterFrameset($token); break;
-                case self::END_PHASE:  return $this->trailingEndPhase($token); break;
-            }
-        }
-    }
-
-    private function beforeHead($token) {
-        /* Handle the token as follows: */
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append the character to the current node. */
-            $this->insertText($token['data']);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data attribute
-            set to the data given in the comment token. */
-            $this->insertComment($token['data']);
-
-        /* A start tag token with the tag name "head" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'head') {
-            /* Create an element for the token, append the new element to the
-            current node and push it onto the stack of open elements. */
-            $element = $this->insertElement($token);
-
-            /* Set the head element pointer to this new element node. */
-            $this->head_pointer = $element;
-
-            /* Change the insertion mode to "in head". */
-            $this->mode = self::IN_HEAD;
-
-        /* A start tag token whose tag name is one of: "base", "link", "meta",
-        "script", "style", "title". Or an end tag with the tag name "html".
-        Or a character token that is not one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE. Or any other start tag token */
-        } elseif($token['type'] === HTML5::STARTTAG ||
-        ($token['type'] === HTML5::ENDTAG && $token['name'] === 'html') ||
-        ($token['type'] === HTML5::CHARACTR && !preg_match('/^[\t\n\x0b\x0c ]$/',
-        $token['data']))) {
-            /* Act as if a start tag token with the tag name "head" and no
-            attributes had been seen, then reprocess the current token. */
-            $this->beforeHead(array(
-                'name' => 'head',
-                'type' => HTML5::STARTTAG,
-                'attr' => array()
-            ));
-
-            return $this->inHead($token);
-
-        /* Any other end tag */
-        } elseif($token['type'] === HTML5::ENDTAG) {
-            /* Parse error. Ignore the token. */
-        }
-    }
-
-    private function inHead($token) {
-        /* Handle the token as follows: */
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE.
-
-        THIS DIFFERS FROM THE SPEC: If the current node is either a title, style
-        or script element, append the character to the current node regardless
-        of its content. */
-        if(($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) || (
-        $token['type'] === HTML5::CHARACTR && in_array(end($this->stack)->nodeName,
-        array('title', 'style', 'script')))) {
-            /* Append the character to the current node. */
-            $this->insertText($token['data']);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data attribute
-            set to the data given in the comment token. */
-            $this->insertComment($token['data']);
-
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        in_array($token['name'], array('title', 'style', 'script'))) {
-            array_pop($this->stack);
-            return HTML5::PCDATA;
-
-        /* A start tag with the tag name "title" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'title') {
-            /* Create an element for the token and append the new element to the
-            node pointed to by the head element pointer, or, if that is null
-            (innerHTML case), to the current node. */
-            if($this->head_pointer !== null) {
-                $element = $this->insertElement($token, false);
-                $this->head_pointer->appendChild($element);
-
-            } else {
-                $element = $this->insertElement($token);
-            }
-
-            /* Switch the tokeniser's content model flag  to the RCDATA state. */
-            return HTML5::RCDATA;
-
-        /* A start tag with the tag name "style" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'style') {
-            /* Create an element for the token and append the new element to the
-            node pointed to by the head element pointer, or, if that is null
-            (innerHTML case), to the current node. */
-            if($this->head_pointer !== null) {
-                $element = $this->insertElement($token, false);
-                $this->head_pointer->appendChild($element);
-
-            } else {
-                $this->insertElement($token);
-            }
-
-            /* Switch the tokeniser's content model flag  to the CDATA state. */
-            return HTML5::CDATA;
-
-        /* A start tag with the tag name "script" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'script') {
-            /* Create an element for the token. */
-            $element = $this->insertElement($token, false);
-            $this->head_pointer->appendChild($element);
-
-            /* Switch the tokeniser's content model flag  to the CDATA state. */
-            return HTML5::CDATA;
-
-        /* A start tag with the tag name "base", "link", or "meta" */
-        } elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('base', 'link', 'meta'))) {
-            /* Create an element for the token and append the new element to the
-            node pointed to by the head element pointer, or, if that is null
-            (innerHTML case), to the current node. */
-            if($this->head_pointer !== null) {
-                $element = $this->insertElement($token, false);
-                $this->head_pointer->appendChild($element);
-                array_pop($this->stack);
-
-            } else {
-                $this->insertElement($token);
-            }
-
-        /* An end tag with the tag name "head" */
-        } elseif($token['type'] === HTML5::ENDTAG && $token['name'] === 'head') {
-            /* If the current node is a head element, pop the current node off
-            the stack of open elements. */
-            if($this->head_pointer->isSameNode(end($this->stack))) {
-                array_pop($this->stack);
-
-            /* Otherwise, this is a parse error. */
-            } else {
-                // k
-            }
-
-            /* Change the insertion mode to "after head". */
-            $this->mode = self::AFTER_HEAD;
-
-        /* A start tag with the tag name "head" or an end tag except "html". */
-        } elseif(($token['type'] === HTML5::STARTTAG && $token['name'] === 'head') ||
-        ($token['type'] === HTML5::ENDTAG && $token['name'] !== 'html')) {
-            // Parse error. Ignore the token.
-
-        /* Anything else */
-        } else {
-            /* If the current node is a head element, act as if an end tag
-            token with the tag name "head" had been seen. */
-            if($this->head_pointer->isSameNode(end($this->stack))) {
-                $this->inHead(array(
-                    'name' => 'head',
-                    'type' => HTML5::ENDTAG
-                ));
-
-            /* Otherwise, change the insertion mode to "after head". */
-            } else {
-                $this->mode = self::AFTER_HEAD;
-            }
-
-            /* Then, reprocess the current token. */
-            return $this->afterHead($token);
-        }
-    }
-
-    private function afterHead($token) {
-        /* Handle the token as follows: */
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append the character to the current node. */
-            $this->insertText($token['data']);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data attribute
-            set to the data given in the comment token. */
-            $this->insertComment($token['data']);
-
-        /* A start tag token with the tag name "body" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'body') {
-            /* Insert a body element for the token. */
-            $this->insertElement($token);
-
-            /* Change the insertion mode to "in body". */
-            $this->mode = self::IN_BODY;
-
-        /* A start tag token with the tag name "frameset" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'frameset') {
-            /* Insert a frameset element for the token. */
-            $this->insertElement($token);
-
-            /* Change the insertion mode to "in frameset". */
-            $this->mode = self::IN_FRAME;
-
-        /* A start tag token whose tag name is one of: "base", "link", "meta",
-        "script", "style", "title" */
-        } elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('base', 'link', 'meta', 'script', 'style', 'title'))) {
-            /* Parse error. Switch the insertion mode back to "in head" and
-            reprocess the token. */
-            $this->mode = self::IN_HEAD;
-            return $this->inHead($token);
-
-        /* Anything else */
-        } else {
-            /* Act as if a start tag token with the tag name "body" and no
-            attributes had been seen, and then reprocess the current token. */
-            $this->afterHead(array(
-                'name' => 'body',
-                'type' => HTML5::STARTTAG,
-                'attr' => array()
-            ));
-
-            return $this->inBody($token);
-        }
-    }
-
-    private function inBody($token) {
-        /* Handle the token as follows: */
-
-        switch($token['type']) {
-            /* A character token */
-            case HTML5::CHARACTR:
-                /* Reconstruct the active formatting elements, if any. */
-                $this->reconstructActiveFormattingElements();
-
-                /* Append the token's character to the current node. */
-                $this->insertText($token['data']);
-            break;
-
-            /* A comment token */
-            case HTML5::COMMENT:
-                /* Append a Comment node to the current node with the data
-                attribute set to the data given in the comment token. */
-                $this->insertComment($token['data']);
-            break;
-
-            case HTML5::STARTTAG:
-            switch($token['name']) {
-                /* A start tag token whose tag name is one of: "script",
-                "style" */
-                case 'script': case 'style':
-                    /* Process the token as if the insertion mode had been "in
-                    head". */
-                    return $this->inHead($token);
-                break;
-
-                /* A start tag token whose tag name is one of: "base", "link",
-                "meta", "title" */
-                case 'base': case 'link': case 'meta': case 'title':
-                    /* Parse error. Process the token as if the insertion mode
-                    had    been "in head". */
-                    return $this->inHead($token);
-                break;
-
-                /* A start tag token with the tag name "body" */
-                case 'body':
-                    /* Parse error. If the second element on the stack of open
-                    elements is not a body element, or, if the stack of open
-                    elements has only one node on it, then ignore the token.
-                    (innerHTML case) */
-                    if(count($this->stack) === 1 || $this->stack[1]->nodeName !== 'body') {
-                        // Ignore
-
-                    /* Otherwise, for each attribute on the token, check to see
-                    if the attribute is already present on the body element (the
-                    second element)    on the stack of open elements. If it is not,
-                    add the attribute and its corresponding value to that
-                    element. */
-                    } else {
-                        foreach($token['attr'] as $attr) {
-                            if(!$this->stack[1]->hasAttribute($attr['name'])) {
-                                $this->stack[1]->setAttribute($attr['name'], $attr['value']);
-                            }
-                        }
-                    }
-                break;
-
-                /* A start tag whose tag name is one of: "address",
-                "blockquote", "center", "dir", "div", "dl", "fieldset",
-                "listing", "menu", "ol", "p", "ul" */
-                case 'address': case 'blockquote': case 'center': case 'dir':
-                case 'div': case 'dl': case 'fieldset': case 'listing':
-                case 'menu': case 'ol': case 'p': case 'ul':
-                    /* If the stack of open elements has a p element in scope,
-                    then act as if an end tag with the tag name p had been
-                    seen. */
-                    if($this->elementInScope('p')) {
-                        $this->emitToken(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-                break;
-
-                /* A start tag whose tag name is "form" */
-                case 'form':
-                    /* If the form element pointer is not null, ignore the
-                    token with a parse error. */
-                    if($this->form_pointer !== null) {
-                        // Ignore.
-
-                    /* Otherwise: */
-                    } else {
-                        /* If the stack of open elements has a p element in
-                        scope, then act as if an end tag with the tag name p
-                        had been seen. */
-                        if($this->elementInScope('p')) {
-                            $this->emitToken(array(
-                                'name' => 'p',
-                                'type' => HTML5::ENDTAG
-                            ));
-                        }
-
-                        /* Insert an HTML element for the token, and set the
-                        form element pointer to point to the element created. */
-                        $element = $this->insertElement($token);
-                        $this->form_pointer = $element;
-                    }
-                break;
-
-                /* A start tag whose tag name is "li", "dd" or "dt" */
-                case 'li': case 'dd': case 'dt':
-                    /* If the stack of open elements has a p  element in scope,
-                    then act as if an end tag with the tag name p had been
-                    seen. */
-                    if($this->elementInScope('p')) {
-                        $this->emitToken(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    $stack_length = count($this->stack) - 1;
-
-                    for($n = $stack_length; 0 <= $n; $n--) {
-                        /* 1. Initialise node to be the current node (the
-                        bottommost node of the stack). */
-                        $stop = false;
-                        $node = $this->stack[$n];
-                        $cat  = $this->getElementCategory($node->tagName);
-
-                        /* 2. If node is an li, dd or dt element, then pop all
-                        the    nodes from the current node up to node, including
-                        node, then stop this algorithm. */
-                        if($token['name'] === $node->tagName ||    ($token['name'] !== 'li'
-                        && ($node->tagName === 'dd' || $node->tagName === 'dt'))) {
-                            for($x = $stack_length; $x >= $n ; $x--) {
-                                array_pop($this->stack);
-                            }
-
-                            break;
-                        }
-
-                        /* 3. If node is not in the formatting category, and is
-                        not    in the phrasing category, and is not an address or
-                        div element, then stop this algorithm. */
-                        if($cat !== self::FORMATTING && $cat !== self::PHRASING &&
-                        $node->tagName !== 'address' && $node->tagName !== 'div') {
-                            break;
-                        }
-                    }
-
-                    /* Finally, insert an HTML element with the same tag
-                    name as the    token's. */
-                    $this->insertElement($token);
-                break;
-
-                /* A start tag token whose tag name is "plaintext" */
-                case 'plaintext':
-                    /* If the stack of open elements has a p  element in scope,
-                    then act as if an end tag with the tag name p had been
-                    seen. */
-                    if($this->elementInScope('p')) {
-                        $this->emitToken(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    return HTML5::PLAINTEXT;
-                break;
-
-                /* A start tag whose tag name is one of: "h1", "h2", "h3", "h4",
-                "h5", "h6" */
-                case 'h1': case 'h2': case 'h3': case 'h4': case 'h5': case 'h6':
-                    /* If the stack of open elements has a p  element in scope,
-                    then act as if an end tag with the tag name p had been seen. */
-                    if($this->elementInScope('p')) {
-                        $this->emitToken(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    /* If the stack of open elements has in scope an element whose
-                    tag name is one of "h1", "h2", "h3", "h4", "h5", or "h6", then
-                    this is a parse error; pop elements from the stack until an
-                    element with one of those tag names has been popped from the
-                    stack. */
-                    while($this->elementInScope(array('h1', 'h2', 'h3', 'h4', 'h5', 'h6'))) {
-                        array_pop($this->stack);
-                    }
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-                break;
-
-                /* A start tag whose tag name is "a" */
-                case 'a':
-                    /* If the list of active formatting elements contains
-                    an element whose tag name is "a" between the end of the
-                    list and the last marker on the list (or the start of
-                    the list if there is no marker on the list), then this
-                    is a parse error; act as if an end tag with the tag name
-                    "a" had been seen, then remove that element from the list
-                    of active formatting elements and the stack of open
-                    elements if the end tag didn't already remove it (it
-                    might not have if the element is not in table scope). */
-                    $leng = count($this->a_formatting);
-
-                    for($n = $leng - 1; $n >= 0; $n--) {
-                        if($this->a_formatting[$n] === self::MARKER) {
-                            break;
-
-                        } elseif($this->a_formatting[$n]->nodeName === 'a') {
-                            $this->emitToken(array(
-                                'name' => 'a',
-                                'type' => HTML5::ENDTAG
-                            ));
-                            break;
-                        }
-                    }
-
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $el = $this->insertElement($token);
-
-                    /* Add that element to the list of active formatting
-                    elements. */
-                    $this->a_formatting[] = $el;
-                break;
-
-                /* A start tag whose tag name is one of: "b", "big", "em", "font",
-                "i", "nobr", "s", "small", "strike", "strong", "tt", "u" */
-                case 'b': case 'big': case 'em': case 'font': case 'i':
-                case 'nobr': case 's': case 'small': case 'strike':
-                case 'strong': case 'tt': case 'u':
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $el = $this->insertElement($token);
-
-                    /* Add that element to the list of active formatting
-                    elements. */
-                    $this->a_formatting[] = $el;
-                break;
-
-                /* A start tag token whose tag name is "button" */
-                case 'button':
-                    /* If the stack of open elements has a button element in scope,
-                    then this is a parse error; act as if an end tag with the tag
-                    name "button" had been seen, then reprocess the token. (We don't
-                    do that. Unnecessary.) */
-                    if($this->elementInScope('button')) {
-                        $this->inBody(array(
-                            'name' => 'button',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Insert a marker at the end of the list of active
-                    formatting elements. */
-                    $this->a_formatting[] = self::MARKER;
-                break;
-
-                /* A start tag token whose tag name is one of: "marquee", "object" */
-                case 'marquee': case 'object':
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Insert a marker at the end of the list of active
-                    formatting elements. */
-                    $this->a_formatting[] = self::MARKER;
-                break;
-
-                /* A start tag token whose tag name is "xmp" */
-                case 'xmp':
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Switch the content model flag to the CDATA state. */
-                    return HTML5::CDATA;
-                break;
-
-                /* A start tag whose tag name is "table" */
-                case 'table':
-                    /* If the stack of open elements has a p element in scope,
-                    then act as if an end tag with the tag name p had been seen. */
-                    if($this->elementInScope('p')) {
-                        $this->emitToken(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Change the insertion mode to "in table". */
-                    $this->mode = self::IN_TABLE;
-                break;
-
-                /* A start tag whose tag name is one of: "area", "basefont",
-                "bgsound", "br", "embed", "img", "param", "spacer", "wbr" */
-                case 'area': case 'basefont': case 'bgsound': case 'br':
-                case 'embed': case 'img': case 'param': case 'spacer':
-                case 'wbr':
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Immediately pop the current node off the stack of open elements. */
-                    array_pop($this->stack);
-                break;
-
-                /* A start tag whose tag name is "hr" */
-                case 'hr':
-                    /* If the stack of open elements has a p element in scope,
-                    then act as if an end tag with the tag name p had been seen. */
-                    if($this->elementInScope('p')) {
-                        $this->emitToken(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Immediately pop the current node off the stack of open elements. */
-                    array_pop($this->stack);
-                break;
-
-                /* A start tag whose tag name is "image" */
-                case 'image':
-                    /* Parse error. Change the token's tag name to "img" and
-                    reprocess it. (Don't ask.) */
-                    $token['name'] = 'img';
-                    return $this->inBody($token);
-                break;
-
-                /* A start tag whose tag name is "input" */
-                case 'input':
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an input element for the token. */
-                    $element = $this->insertElement($token, false);
-
-                    /* If the form element pointer is not null, then associate the
-                    input element with the form element pointed to by the form
-                    element pointer. */
-                    $this->form_pointer !== null
-                        ? $this->form_pointer->appendChild($element)
-                        : end($this->stack)->appendChild($element);
-
-                    /* Pop that input element off the stack of open elements. */
-                    array_pop($this->stack);
-                break;
-
-                /* A start tag whose tag name is "isindex" */
-                case 'isindex':
-                    /* Parse error. */
-                    // w/e
-
-                    /* If the form element pointer is not null,
-                    then ignore the token. */
-                    if($this->form_pointer === null) {
-                        /* Act as if a start tag token with the tag name "form" had
-                        been seen. */
-                        $this->inBody(array(
-                            'name' => 'body',
-                            'type' => HTML5::STARTTAG,
-                            'attr' => array()
-                        ));
-
-                        /* Act as if a start tag token with the tag name "hr" had
-                        been seen. */
-                        $this->inBody(array(
-                            'name' => 'hr',
-                            'type' => HTML5::STARTTAG,
-                            'attr' => array()
-                        ));
-
-                        /* Act as if a start tag token with the tag name "p" had
-                        been seen. */
-                        $this->inBody(array(
-                            'name' => 'p',
-                            'type' => HTML5::STARTTAG,
-                            'attr' => array()
-                        ));
-
-                        /* Act as if a start tag token with the tag name "label"
-                        had been seen. */
-                        $this->inBody(array(
-                            'name' => 'label',
-                            'type' => HTML5::STARTTAG,
-                            'attr' => array()
-                        ));
-
-                        /* Act as if a stream of character tokens had been seen. */
-                        $this->insertText('This is a searchable index. '.
-                        'Insert your search keywords here: ');
-
-                        /* Act as if a start tag token with the tag name "input"
-                        had been seen, with all the attributes from the "isindex"
-                        token, except with the "name" attribute set to the value
-                        "isindex" (ignoring any explicit "name" attribute). */
-                        $attr = $token['attr'];
-                        $attr[] = array('name' => 'name', 'value' => 'isindex');
-
-                        $this->inBody(array(
-                            'name' => 'input',
-                            'type' => HTML5::STARTTAG,
-                            'attr' => $attr
-                        ));
-
-                        /* Act as if a stream of character tokens had been seen
-                        (see below for what they should say). */
-                        $this->insertText('This is a searchable index. '.
-                        'Insert your search keywords here: ');
-
-                        /* Act as if an end tag token with the tag name "label"
-                        had been seen. */
-                        $this->inBody(array(
-                            'name' => 'label',
-                            'type' => HTML5::ENDTAG
-                        ));
-
-                        /* Act as if an end tag token with the tag name "p" had
-                        been seen. */
-                        $this->inBody(array(
-                            'name' => 'p',
-                            'type' => HTML5::ENDTAG
-                        ));
-
-                        /* Act as if a start tag token with the tag name "hr" had
-                        been seen. */
-                        $this->inBody(array(
-                            'name' => 'hr',
-                            'type' => HTML5::ENDTAG
-                        ));
-
-                        /* Act as if an end tag token with the tag name "form" had
-                        been seen. */
-                        $this->inBody(array(
-                            'name' => 'form',
-                            'type' => HTML5::ENDTAG
-                        ));
-                    }
-                break;
-
-                /* A start tag whose tag name is "textarea" */
-                case 'textarea':
-                    $this->insertElement($token);
-
-                    /* Switch the tokeniser's content model flag to the
-                    RCDATA state. */
-                    return HTML5::RCDATA;
-                break;
-
-                /* A start tag whose tag name is one of: "iframe", "noembed",
-                "noframes" */
-                case 'iframe': case 'noembed': case 'noframes':
-                    $this->insertElement($token);
-
-                    /* Switch the tokeniser's content model flag to the CDATA state. */
-                    return HTML5::CDATA;
-                break;
-
-                /* A start tag whose tag name is "select" */
-                case 'select':
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    /* Insert an HTML element for the token. */
-                    $this->insertElement($token);
-
-                    /* Change the insertion mode to "in select". */
-                    $this->mode = self::IN_SELECT;
-                break;
-
-                /* A start or end tag whose tag name is one of: "caption", "col",
-                "colgroup", "frame", "frameset", "head", "option", "optgroup",
-                "tbody", "td", "tfoot", "th", "thead", "tr". */
-                case 'caption': case 'col': case 'colgroup': case 'frame':
-                case 'frameset': case 'head': case 'option': case 'optgroup':
-                case 'tbody': case 'td': case 'tfoot': case 'th': case 'thead':
-                case 'tr':
-                    // Parse error. Ignore the token.
-                break;
-
-                /* A start or end tag whose tag name is one of: "event-source",
-                "section", "nav", "article", "aside", "header", "footer",
-                "datagrid", "command" */
-                case 'event-source': case 'section': case 'nav': case 'article':
-                case 'aside': case 'header': case 'footer': case 'datagrid':
-                case 'command':
-                    // Work in progress!
-                break;
-
-                /* A start tag token not covered by the previous entries */
-                default:
-                    /* Reconstruct the active formatting elements, if any. */
-                    $this->reconstructActiveFormattingElements();
-
-                    $this->insertElement($token, true, true);
-                break;
-            }
-            break;
-
-            case HTML5::ENDTAG:
-            switch($token['name']) {
-                /* An end tag with the tag name "body" */
-                case 'body':
-                    /* If the second element in the stack of open elements is
-                    not a body element, this is a parse error. Ignore the token.
-                    (innerHTML case) */
-                    if(count($this->stack) < 2 || $this->stack[1]->nodeName !== 'body') {
-                        // Ignore.
-
-                    /* If the current node is not the body element, then this
-                    is a parse error. */
-                    } elseif(end($this->stack)->nodeName !== 'body') {
-                        // Parse error.
-                    }
-
-                    /* Change the insertion mode to "after body". */
-                    $this->mode = self::AFTER_BODY;
-                break;
-
-                /* An end tag with the tag name "html" */
-                case 'html':
-                    /* Act as if an end tag with tag name "body" had been seen,
-                    then, if that token wasn't ignored, reprocess the current
-                    token. */
-                    $this->inBody(array(
-                        'name' => 'body',
-                        'type' => HTML5::ENDTAG
-                    ));
-
-                    return $this->afterBody($token);
-                break;
-
-                /* An end tag whose tag name is one of: "address", "blockquote",
-                "center", "dir", "div", "dl", "fieldset", "listing", "menu",
-                "ol", "pre", "ul" */
-                case 'address': case 'blockquote': case 'center': case 'dir':
-                case 'div': case 'dl': case 'fieldset': case 'listing':
-                case 'menu': case 'ol': case 'pre': case 'ul':
-                    /* If the stack of open elements has an element in scope
-                    with the same tag name as that of the token, then generate
-                    implied end tags. */
-                    if($this->elementInScope($token['name'])) {
-                        $this->generateImpliedEndTags();
-
-                        /* Now, if the current node is not an element with
-                        the same tag name as that of the token, then this
-                        is a parse error. */
-                        // w/e
-
-                        /* If the stack of open elements has an element in
-                        scope with the same tag name as that of the token,
-                        then pop elements from this stack until an element
-                        with that tag name has been popped from the stack. */
-                        for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                            if($this->stack[$n]->nodeName === $token['name']) {
-                                $n = -1;
-                            }
-
-                            array_pop($this->stack);
-                        }
-                    }
-                break;
-
-                /* An end tag whose tag name is "form" */
-                case 'form':
-                    /* If the stack of open elements has an element in scope
-                    with the same tag name as that of the token, then generate
-                    implied    end tags. */
-                    if($this->elementInScope($token['name'])) {
-                        $this->generateImpliedEndTags();
-
-                    } 
-
-                    if(end($this->stack)->nodeName !== $token['name']) {
-                        /* Now, if the current node is not an element with the
-                        same tag name as that of the token, then this is a parse
-                        error. */
-                        // w/e
-
-                    } else {
-                        /* Otherwise, if the current node is an element with
-                        the same tag name as that of the token pop that element
-                        from the stack. */
-                        array_pop($this->stack);
-                    }
-
-                    /* In any case, set the form element pointer to null. */
-                    $this->form_pointer = null;
-                break;
-
-                /* An end tag whose tag name is "p" */
-                case 'p':
-                    /* If the stack of open elements has a p element in scope,
-                    then generate implied end tags, except for p elements. */
-                    if($this->elementInScope('p')) {
-                        $this->generateImpliedEndTags(array('p'));
-
-                        /* If the current node is not a p element, then this is
-                        a parse error. */
-                        // k
-
-                        /* If the stack of open elements has a p element in
-                        scope, then pop elements from this stack until the stack
-                        no longer has a p element in scope. */
-                        for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                            if($this->elementInScope('p')) {
-                                array_pop($this->stack);
-
-                            } else {
-                                break;
-                            }
-                        }
-                    }
-                break;
-
-                /* An end tag whose tag name is "dd", "dt", or "li" */
-                case 'dd': case 'dt': case 'li':
-                    /* If the stack of open elements has an element in scope
-                    whose tag name matches the tag name of the token, then
-                    generate implied end tags, except for elements with the
-                    same tag name as the token. */
-                    if($this->elementInScope($token['name'])) {
-                        $this->generateImpliedEndTags(array($token['name']));
-
-                        /* If the current node is not an element with the same
-                        tag name as the token, then this is a parse error. */
-                        // w/e
-
-                        /* If the stack of open elements has an element in scope
-                        whose tag name matches the tag name of the token, then
-                        pop elements from this stack until an element with that
-                        tag name has been popped from the stack. */
-                        for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                            if($this->stack[$n]->nodeName === $token['name']) {
-                                $n = -1;
-                            }
-
-                            array_pop($this->stack);
-                        }
-                    }
-                break;
-
-                /* An end tag whose tag name is one of: "h1", "h2", "h3", "h4",
-                "h5", "h6" */
-                case 'h1': case 'h2': case 'h3': case 'h4': case 'h5': case 'h6':
-                    $elements = array('h1', 'h2', 'h3', 'h4', 'h5', 'h6');
-
-                    /* If the stack of open elements has in scope an element whose
-                    tag name is one of "h1", "h2", "h3", "h4", "h5", or "h6", then
-                    generate implied end tags. */
-                    if($this->elementInScope($elements)) {
-                        $this->generateImpliedEndTags();
-
-                        /* Now, if the current node is not an element with the same
-                        tag name as that of the token, then this is a parse error. */
-                        // w/e
-
-                        /* If the stack of open elements has in scope an element
-                        whose tag name is one of "h1", "h2", "h3", "h4", "h5", or
-                        "h6", then pop elements from the stack until an element
-                        with one of those tag names has been popped from the stack. */
-                        while($this->elementInScope($elements)) {
-                            array_pop($this->stack);
-                        }
-                    }
-                break;
-
-                /* An end tag whose tag name is one of: "a", "b", "big", "em",
-                "font", "i", "nobr", "s", "small", "strike", "strong", "tt", "u" */
-                case 'a': case 'b': case 'big': case 'em': case 'font':
-                case 'i': case 'nobr': case 's': case 'small': case 'strike':
-                case 'strong': case 'tt': case 'u':
-                    /* 1. Let the formatting element be the last element in
-                    the list of active formatting elements that:
-                        * is between the end of the list and the last scope
-                        marker in the list, if any, or the start of the list
-                        otherwise, and
-                        * has the same tag name as the token.
-                    */
-                    while(true) {
-                        for($a = count($this->a_formatting) - 1; $a >= 0; $a--) {
-                            if($this->a_formatting[$a] === self::MARKER) {
-                                break;
-
-                            } elseif($this->a_formatting[$a]->tagName === $token['name']) {
-                                $formatting_element = $this->a_formatting[$a];
-                                $in_stack = in_array($formatting_element, $this->stack, true);
-                                $fe_af_pos = $a;
-                                break;
-                            }
-                        }
-
-                        /* If there is no such node, or, if that node is
-                        also in the stack of open elements but the element
-                        is not in scope, then this is a parse error. Abort
-                        these steps. The token is ignored. */
-                        if(!isset($formatting_element) || ($in_stack &&
-                        !$this->elementInScope($token['name']))) {
-                            break;
-
-                        /* Otherwise, if there is such a node, but that node
-                        is not in the stack of open elements, then this is a
-                        parse error; remove the element from the list, and
-                        abort these steps. */
-                        } elseif(isset($formatting_element) && !$in_stack) {
-                            unset($this->a_formatting[$fe_af_pos]);
-                            $this->a_formatting = array_merge($this->a_formatting);
-                            break;
-                        }
-
-                        /* 2. Let the furthest block be the topmost node in the
-                        stack of open elements that is lower in the stack
-                        than the formatting element, and is not an element in
-                        the phrasing or formatting categories. There might
-                        not be one. */
-                        $fe_s_pos = array_search($formatting_element, $this->stack, true);
-                        $length = count($this->stack);
-
-                        for($s = $fe_s_pos + 1; $s < $length; $s++) {
-                            $category = $this->getElementCategory($this->stack[$s]->nodeName);
-
-                            if($category !== self::PHRASING && $category !== self::FORMATTING) {
-                                $furthest_block = $this->stack[$s];
-                            }
-                        }
-
-                        /* 3. If there is no furthest block, then the UA must
-                        skip the subsequent steps and instead just pop all
-                        the nodes from the bottom of the stack of open
-                        elements, from the current node up to the formatting
-                        element, and remove the formatting element from the
-                        list of active formatting elements. */
-                        if(!isset($furthest_block)) {
-                            for($n = $length - 1; $n >= $fe_s_pos; $n--) {
-                                array_pop($this->stack);
-                            }
-
-                            unset($this->a_formatting[$fe_af_pos]);
-                            $this->a_formatting = array_merge($this->a_formatting);
-                            break;
-                        }
-
-                        /* 4. Let the common ancestor be the element
-                        immediately above the formatting element in the stack
-                        of open elements. */
-                        $common_ancestor = $this->stack[$fe_s_pos - 1];
-
-                        /* 5. If the furthest block has a parent node, then
-                        remove the furthest block from its parent node. */
-                        if($furthest_block->parentNode !== null) {
-                            $furthest_block->parentNode->removeChild($furthest_block);
-                        }
-
-                        /* 6. Let a bookmark note the position of the
-                        formatting element in the list of active formatting
-                        elements relative to the elements on either side
-                        of it in the list. */
-                        $bookmark = $fe_af_pos;
-
-                        /* 7. Let node and last node  be the furthest block.
-                        Follow these steps: */
-                        $node = $furthest_block;
-                        $last_node = $furthest_block;
-
-                        while(true) {
-                            for($n = array_search($node, $this->stack, true) - 1; $n >= 0; $n--) {
-                                /* 7.1 Let node be the element immediately
-                                prior to node in the stack of open elements. */
-                                $node = $this->stack[$n];
-
-                                /* 7.2 If node is not in the list of active
-                                formatting elements, then remove node from
-                                the stack of open elements and then go back
-                                to step 1. */
-                                if(!in_array($node, $this->a_formatting, true)) {
-                                    unset($this->stack[$n]);
-                                    $this->stack = array_merge($this->stack);
-
-                                } else {
-                                    break;
-                                }
-                            }
-
-                            /* 7.3 Otherwise, if node is the formatting
-                            element, then go to the next step in the overall
-                            algorithm. */
-                            if($node === $formatting_element) {
-                                break;
-
-                            /* 7.4 Otherwise, if last node is the furthest
-                            block, then move the aforementioned bookmark to
-                            be immediately after the node in the list of
-                            active formatting elements. */
-                            } elseif($last_node === $furthest_block) {
-                                $bookmark = array_search($node, $this->a_formatting, true) + 1;
-                            }
-
-                            /* 7.5 If node has any children, perform a
-                            shallow clone of node, replace the entry for
-                            node in the list of active formatting elements
-                            with an entry for the clone, replace the entry
-                            for node in the stack of open elements with an
-                            entry for the clone, and let node be the clone. */
-                            if($node->hasChildNodes()) {
-                                $clone = $node->cloneNode();
-                                $s_pos = array_search($node, $this->stack, true);
-                                $a_pos = array_search($node, $this->a_formatting, true);
-
-                                $this->stack[$s_pos] = $clone;
-                                $this->a_formatting[$a_pos] = $clone;
-                                $node = $clone;
-                            }
-
-                            /* 7.6 Insert last node into node, first removing
-                            it from its previous parent node if any. */
-                            if($last_node->parentNode !== null) {
-                                $last_node->parentNode->removeChild($last_node);
-                            }
-
-                            $node->appendChild($last_node);
-
-                            /* 7.7 Let last node be node. */
-                            $last_node = $node;
-                        }
-
-                        /* 8. Insert whatever last node ended up being in
-                        the previous step into the common ancestor node,
-                        first removing it from its previous parent node if
-                        any. */
-                        if($last_node->parentNode !== null) {
-                            $last_node->parentNode->removeChild($last_node);
-                        }
-
-                        $common_ancestor->appendChild($last_node);
-
-                        /* 9. Perform a shallow clone of the formatting
-                        element. */
-                        $clone = $formatting_element->cloneNode();
-
-                        /* 10. Take all of the child nodes of the furthest
-                        block and append them to the clone created in the
-                        last step. */
-                        while($furthest_block->hasChildNodes()) {
-                            $child = $furthest_block->firstChild;
-                            $furthest_block->removeChild($child);
-                            $clone->appendChild($child);
-                        }
-
-                        /* 11. Append that clone to the furthest block. */
-                        $furthest_block->appendChild($clone);
-
-                        /* 12. Remove the formatting element from the list
-                        of active formatting elements, and insert the clone
-                        into the list of active formatting elements at the
-                        position of the aforementioned bookmark. */
-                        $fe_af_pos = array_search($formatting_element, $this->a_formatting, true);
-                        unset($this->a_formatting[$fe_af_pos]);
-                        $this->a_formatting = array_merge($this->a_formatting);
-
-                        $af_part1 = array_slice($this->a_formatting, 0, $bookmark - 1);
-                        $af_part2 = array_slice($this->a_formatting, $bookmark, count($this->a_formatting));
-                        $this->a_formatting = array_merge($af_part1, array($clone), $af_part2);
-
-                        /* 13. Remove the formatting element from the stack
-                        of open elements, and insert the clone into the stack
-                        of open elements immediately after (i.e. in a more
-                        deeply nested position than) the position of the
-                        furthest block in that stack. */
-                        $fe_s_pos = array_search($formatting_element, $this->stack, true);
-                        $fb_s_pos = array_search($furthest_block, $this->stack, true);
-                        unset($this->stack[$fe_s_pos]);
-
-                        $s_part1 = array_slice($this->stack, 0, $fb_s_pos);
-                        $s_part2 = array_slice($this->stack, $fb_s_pos + 1, count($this->stack));
-                        $this->stack = array_merge($s_part1, array($clone), $s_part2);
-
-                        /* 14. Jump back to step 1 in this series of steps. */
-                        unset($formatting_element, $fe_af_pos, $fe_s_pos, $furthest_block);
-                    }
-                break;
-
-                /* An end tag token whose tag name is one of: "button",
-                "marquee", "object" */
-                case 'button': case 'marquee': case 'object':
-                    /* If the stack of open elements has an element in scope whose
-                    tag name matches the tag name of the token, then generate implied
-                    tags. */
-                    if($this->elementInScope($token['name'])) {
-                        $this->generateImpliedEndTags();
-
-                        /* Now, if the current node is not an element with the same
-                        tag name as the token, then this is a parse error. */
-                        // k
-
-                        /* Now, if the stack of open elements has an element in scope
-                        whose tag name matches the tag name of the token, then pop
-                        elements from the stack until that element has been popped from
-                        the stack, and clear the list of active formatting elements up
-                        to the last marker. */
-                        for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                            if($this->stack[$n]->nodeName === $token['name']) {
-                                $n = -1;
-                            }
-
-                            array_pop($this->stack);
-                        }
-
-                        $marker = end(array_keys($this->a_formatting, self::MARKER, true));
-
-                        for($n = count($this->a_formatting) - 1; $n > $marker; $n--) {
-                            array_pop($this->a_formatting);
-                        }
-                    }
-                break;
-
-                /* Or an end tag whose tag name is one of: "area", "basefont",
-                "bgsound", "br", "embed", "hr", "iframe", "image", "img",
-                "input", "isindex", "noembed", "noframes", "param", "select",
-                "spacer", "table", "textarea", "wbr" */
-                case 'area': case 'basefont': case 'bgsound': case 'br':
-                case 'embed': case 'hr': case 'iframe': case 'image':
-                case 'img': case 'input': case 'isindex': case 'noembed':
-                case 'noframes': case 'param': case 'select': case 'spacer':
-                case 'table': case 'textarea': case 'wbr':
-                    // Parse error. Ignore the token.
-                break;
-
-                /* An end tag token not covered by the previous entries */
-                default:
-                    for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                        /* Initialise node to be the current node (the bottommost
-                        node of the stack). */
-                        $node = end($this->stack);
-
-                        /* If node has the same tag name as the end tag token,
-                        then: */
-                        if($token['name'] === $node->nodeName) {
-                            /* Generate implied end tags. */
-                            $this->generateImpliedEndTags();
-
-                            /* If the tag name of the end tag token does not
-                            match the tag name of the current node, this is a
-                            parse error. */
-                            // k
-
-                            /* Pop all the nodes from the current node up to
-                            node, including node, then stop this algorithm. */
-                            for($x = count($this->stack) - $n; $x >= $n; $x--) {
-                                array_pop($this->stack);
-                            }
-                                    
-                        } else {
-                            $category = $this->getElementCategory($node);
-
-                            if($category !== self::SPECIAL && $category !== self::SCOPING) {
-                                /* Otherwise, if node is in neither the formatting
-                                category nor the phrasing category, then this is a
-                                parse error. Stop this algorithm. The end tag token
-                                is ignored. */
-                                return false;
-                            }
-                        }
-                    }
-                break;
-            }
-            break;
-        }
-    }
-
-    private function inTable($token) {
-        $clear = array('html', 'table');
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append the character to the current node. */
-            $text = $this->dom->createTextNode($token['data']);
-            end($this->stack)->appendChild($text);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data
-            attribute set to the data given in the comment token. */
-            $comment = $this->dom->createComment($token['data']);
-            end($this->stack)->appendChild($comment);
-
-        /* A start tag whose tag name is "caption" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        $token['name'] === 'caption') {
-            /* Clear the stack back to a table context. */
-            $this->clearStackToTableContext($clear);
-
-            /* Insert a marker at the end of the list of active
-            formatting elements. */
-            $this->a_formatting[] = self::MARKER;
-
-            /* Insert an HTML element for the token, then switch the
-            insertion mode to "in caption". */
-            $this->insertElement($token);
-            $this->mode = self::IN_CAPTION;
-
-        /* A start tag whose tag name is "colgroup" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        $token['name'] === 'colgroup') {
-            /* Clear the stack back to a table context. */
-            $this->clearStackToTableContext($clear);
-
-            /* Insert an HTML element for the token, then switch the
-            insertion mode to "in column group". */
-            $this->insertElement($token);
-            $this->mode = self::IN_CGROUP;
-
-        /* A start tag whose tag name is "col" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        $token['name'] === 'col') {
-            $this->inTable(array(
-                'name' => 'colgroup',
-                'type' => HTML5::STARTTAG,
-                'attr' => array()
-            ));
-
-            $this->inColumnGroup($token);
-
-        /* A start tag whose tag name is one of: "tbody", "tfoot", "thead" */
-        } elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('tbody', 'tfoot', 'thead'))) {
-            /* Clear the stack back to a table context. */
-            $this->clearStackToTableContext($clear);
-
-            /* Insert an HTML element for the token, then switch the insertion
-            mode to "in table body". */
-            $this->insertElement($token);
-            $this->mode = self::IN_TBODY;
-
-        /* A start tag whose tag name is one of: "td", "th", "tr" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        in_array($token['name'], array('td', 'th', 'tr'))) {
-            /* Act as if a start tag token with the tag name "tbody" had been
-            seen, then reprocess the current token. */
-            $this->inTable(array(
-                'name' => 'tbody',
-                'type' => HTML5::STARTTAG,
-                'attr' => array()
-            ));
-
-            return $this->inTableBody($token);
-
-        /* A start tag whose tag name is "table" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        $token['name'] === 'table') {
-            /* Parse error. Act as if an end tag token with the tag name "table"
-            had been seen, then, if that token wasn't ignored, reprocess the
-            current token. */
-            $this->inTable(array(
-                'name' => 'table',
-                'type' => HTML5::ENDTAG
-            ));
-
-            return $this->mainPhase($token);
-
-        /* An end tag whose tag name is "table" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        $token['name'] === 'table') {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as the token, this is a parse error.
-            Ignore the token. (innerHTML case) */
-            if(!$this->elementInScope($token['name'], true)) {
-                return false;
-
-            /* Otherwise: */
-            } else {
-                /* Generate implied end tags. */
-                $this->generateImpliedEndTags();
-
-                /* Now, if the current node is not a table element, then this
-                is a parse error. */
-                // w/e
-
-                /* Pop elements from this stack until a table element has been
-                popped from the stack. */
-                while(true) {
-                    $current = end($this->stack)->nodeName;
-                    array_pop($this->stack);
-
-                    if($current === 'table') {
-                        break;
-                    }
-                }
-
-                /* Reset the insertion mode appropriately. */
-                $this->resetInsertionMode();
-            }
-
-        /* An end tag whose tag name is one of: "body", "caption", "col",
-        "colgroup", "html", "tbody", "td", "tfoot", "th", "thead", "tr" */
-        } elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
-        array('body', 'caption', 'col', 'colgroup', 'html', 'tbody', 'td',
-        'tfoot', 'th', 'thead', 'tr'))) {
-            // Parse error. Ignore the token.
-
-        /* Anything else */
-        } else {
-            /* Parse error. Process the token as if the insertion mode was "in
-            body", with the following exception: */
-
-            /* If the current node is a table, tbody, tfoot, thead, or tr
-            element, then, whenever a node would be inserted into the current
-            node, it must instead be inserted into the foster parent element. */
-            if(in_array(end($this->stack)->nodeName,
-            array('table', 'tbody', 'tfoot', 'thead', 'tr'))) {
-                /* The foster parent element is the parent element of the last
-                table element in the stack of open elements, if there is a
-                table element and it has such a parent element. If there is no
-                table element in the stack of open elements (innerHTML case),
-                then the foster parent element is the first element in the
-                stack of open elements (the html  element). Otherwise, if there
-                is a table element in the stack of open elements, but the last
-                table element in the stack of open elements has no parent, or
-                its parent node is not an element, then the foster parent
-                element is the element before the last table element in the
-                stack of open elements. */
-                for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                    if($this->stack[$n]->nodeName === 'table') {
-                        $table = $this->stack[$n];
-                        break;
-                    }
-                }
-
-                if(isset($table) && $table->parentNode !== null) {
-                    $this->foster_parent = $table->parentNode;
-
-                } elseif(!isset($table)) {
-                    $this->foster_parent = $this->stack[0];
-
-                } elseif(isset($table) && ($table->parentNode === null ||
-                $table->parentNode->nodeType !== XML_ELEMENT_NODE)) {
-                    $this->foster_parent = $this->stack[$n - 1];
-                }
-            }
-
-            $this->inBody($token);
-        }
-    }
-
-    private function inCaption($token) {
-        /* An end tag whose tag name is "caption" */
-        if($token['type'] === HTML5::ENDTAG && $token['name'] === 'caption') {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as the token, this is a parse error.
-            Ignore the token. (innerHTML case) */
-            if(!$this->elementInScope($token['name'], true)) {
-                // Ignore
-
-            /* Otherwise: */
-            } else {
-                /* Generate implied end tags. */
-                $this->generateImpliedEndTags();
-
-                /* Now, if the current node is not a caption element, then this
-                is a parse error. */
-                // w/e
-
-                /* Pop elements from this stack until a caption element has
-                been popped from the stack. */
-                while(true) {
-                    $node = end($this->stack)->nodeName;
-                    array_pop($this->stack);
-
-                    if($node === 'caption') {
-                        break;
-                    }
-                }
-
-                /* Clear the list of active formatting elements up to the last
-                marker. */
-                $this->clearTheActiveFormattingElementsUpToTheLastMarker();
-
-                /* Switch the insertion mode to "in table". */
-                $this->mode = self::IN_TABLE;
-            }
-
-        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
-        "tbody", "td", "tfoot", "th", "thead", "tr", or an end tag whose tag
-        name is "table" */
-        } elseif(($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('caption', 'col', 'colgroup', 'tbody', 'td', 'tfoot', 'th',
-        'thead', 'tr'))) || ($token['type'] === HTML5::ENDTAG &&
-        $token['name'] === 'table')) {
-            /* Parse error. Act as if an end tag with the tag name "caption"
-            had been seen, then, if that token wasn't ignored, reprocess the
-            current token. */
-            $this->inCaption(array(
-                'name' => 'caption',
-                'type' => HTML5::ENDTAG
-            ));
-
-            return $this->inTable($token);
-
-        /* An end tag whose tag name is one of: "body", "col", "colgroup",
-        "html", "tbody", "td", "tfoot", "th", "thead", "tr" */
-        } elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
-        array('body', 'col', 'colgroup', 'html', 'tbody', 'tfoot', 'th',
-        'thead', 'tr'))) {
-            // Parse error. Ignore the token.
-
-        /* Anything else */
-        } else {
-            /* Process the token as if the insertion mode was "in body". */
-            $this->inBody($token);
-        }
-    }
-
-    private function inColumnGroup($token) {
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append the character to the current node. */
-            $text = $this->dom->createTextNode($token['data']);
-            end($this->stack)->appendChild($text);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data
-            attribute set to the data given in the comment token. */
-            $comment = $this->dom->createComment($token['data']);
-            end($this->stack)->appendChild($comment);
-
-        /* A start tag whose tag name is "col" */
-        } elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'col') {
-            /* Insert a col element for the token. Immediately pop the current
-            node off the stack of open elements. */
-            $this->insertElement($token);
-            array_pop($this->stack);
-
-        /* An end tag whose tag name is "colgroup" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        $token['name'] === 'colgroup') {
-            /* If the current node is the root html element, then this is a
-            parse error, ignore the token. (innerHTML case) */
-            if(end($this->stack)->nodeName === 'html') {
-                // Ignore
-
-            /* Otherwise, pop the current node (which will be a colgroup
-            element) from the stack of open elements. Switch the insertion
-            mode to "in table". */
-            } else {
-                array_pop($this->stack);
-                $this->mode = self::IN_TABLE;
-            }
-
-        /* An end tag whose tag name is "col" */
-        } elseif($token['type'] === HTML5::ENDTAG && $token['name'] === 'col') {
-            /* Parse error. Ignore the token. */
-
-        /* Anything else */
-        } else {
-            /* Act as if an end tag with the tag name "colgroup" had been seen,
-            and then, if that token wasn't ignored, reprocess the current token. */
-            $this->inColumnGroup(array(
-                'name' => 'colgroup',
-                'type' => HTML5::ENDTAG
-            ));
-
-            return $this->inTable($token);
-        }
-    }
-
-    private function inTableBody($token) {
-        $clear = array('tbody', 'tfoot', 'thead', 'html');
-
-        /* A start tag whose tag name is "tr" */
-        if($token['type'] === HTML5::STARTTAG && $token['name'] === 'tr') {
-            /* Clear the stack back to a table body context. */
-            $this->clearStackToTableContext($clear);
-
-            /* Insert a tr element for the token, then switch the insertion
-            mode to "in row". */
-            $this->insertElement($token);
-            $this->mode = self::IN_ROW;
-
-        /* A start tag whose tag name is one of: "th", "td" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        ($token['name'] === 'th' ||    $token['name'] === 'td')) {
-            /* Parse error. Act as if a start tag with the tag name "tr" had
-            been seen, then reprocess the current token. */
-            $this->inTableBody(array(
-                'name' => 'tr',
-                'type' => HTML5::STARTTAG,
-                'attr' => array()
-            ));
-
-            return $this->inRow($token);
-
-        /* An end tag whose tag name is one of: "tbody", "tfoot", "thead" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        in_array($token['name'], array('tbody', 'tfoot', 'thead'))) {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as the token, this is a parse error.
-            Ignore the token. */
-            if(!$this->elementInScope($token['name'], true)) {
-                // Ignore
-
-            /* Otherwise: */
-            } else {
-                /* Clear the stack back to a table body context. */
-                $this->clearStackToTableContext($clear);
-
-                /* Pop the current node from the stack of open elements. Switch
-                the insertion mode to "in table". */
-                array_pop($this->stack);
-                $this->mode = self::IN_TABLE;
-            }
-
-        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
-        "tbody", "tfoot", "thead", or an end tag whose tag name is "table" */
-        } elseif(($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('caption', 'col', 'colgroup', 'tbody', 'tfoor', 'thead'))) ||
-        ($token['type'] === HTML5::STARTTAG && $token['name'] === 'table')) {
-            /* If the stack of open elements does not have a tbody, thead, or
-            tfoot element in table scope, this is a parse error. Ignore the
-            token. (innerHTML case) */
-            if(!$this->elementInScope(array('tbody', 'thead', 'tfoot'), true)) {
-                // Ignore.
-
-            /* Otherwise: */
-            } else {
-                /* Clear the stack back to a table body context. */
-                $this->clearStackToTableContext($clear);
-
-                /* Act as if an end tag with the same tag name as the current
-                node ("tbody", "tfoot", or "thead") had been seen, then
-                reprocess the current token. */
-                $this->inTableBody(array(
-                    'name' => end($this->stack)->nodeName,
-                    'type' => HTML5::ENDTAG
-                ));
-
-                return $this->mainPhase($token);
-            }
-
-        /* An end tag whose tag name is one of: "body", "caption", "col",
-        "colgroup", "html", "td", "th", "tr" */
-        } elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
-        array('body', 'caption', 'col', 'colgroup', 'html', 'td', 'th', 'tr'))) {
-            /* Parse error. Ignore the token. */
-
-        /* Anything else */
-        } else {
-            /* Process the token as if the insertion mode was "in table". */
-            $this->inTable($token);
-        }
-    }
-
-    private function inRow($token) {
-        $clear = array('tr', 'html');
-
-        /* A start tag whose tag name is one of: "th", "td" */
-        if($token['type'] === HTML5::STARTTAG &&
-        ($token['name'] === 'th' || $token['name'] === 'td')) {
-            /* Clear the stack back to a table row context. */
-            $this->clearStackToTableContext($clear);
-
-            /* Insert an HTML element for the token, then switch the insertion
-            mode to "in cell". */
-            $this->insertElement($token);
-            $this->mode = self::IN_CELL;
-
-            /* Insert a marker at the end of the list of active formatting
-            elements. */
-            $this->a_formatting[] = self::MARKER;
-
-        /* An end tag whose tag name is "tr" */
-        } elseif($token['type'] === HTML5::ENDTAG && $token['name'] === 'tr') {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as the token, this is a parse error.
-            Ignore the token. (innerHTML case) */
-            if(!$this->elementInScope($token['name'], true)) {
-                // Ignore.
-
-            /* Otherwise: */
-            } else {
-                /* Clear the stack back to a table row context. */
-                $this->clearStackToTableContext($clear);
-
-                /* Pop the current node (which will be a tr element) from the
-                stack of open elements. Switch the insertion mode to "in table
-                body". */
-                array_pop($this->stack);
-                $this->mode = self::IN_TBODY;
-            }
-
-        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
-        "tbody", "tfoot", "thead", "tr" or an end tag whose tag name is "table" */
-        } elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('caption', 'col', 'colgroup', 'tbody', 'tfoot', 'thead', 'tr'))) {
-            /* Act as if an end tag with the tag name "tr" had been seen, then,
-            if that token wasn't ignored, reprocess the current token. */
-            $this->inRow(array(
-                'name' => 'tr',
-                'type' => HTML5::ENDTAG
-            ));
-
-            return $this->inCell($token);
-
-        /* An end tag whose tag name is one of: "tbody", "tfoot", "thead" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        in_array($token['name'], array('tbody', 'tfoot', 'thead'))) {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as the token, this is a parse error.
-            Ignore the token. */
-            if(!$this->elementInScope($token['name'], true)) {
-                // Ignore.
-
-            /* Otherwise: */
-            } else {
-                /* Otherwise, act as if an end tag with the tag name "tr" had
-                been seen, then reprocess the current token. */
-                $this->inRow(array(
-                    'name' => 'tr',
-                    'type' => HTML5::ENDTAG
-                ));
-
-                return $this->inCell($token);
-            }
-
-        /* An end tag whose tag name is one of: "body", "caption", "col",
-        "colgroup", "html", "td", "th" */
-        } elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
-        array('body', 'caption', 'col', 'colgroup', 'html', 'td', 'th', 'tr'))) {
-            /* Parse error. Ignore the token. */
-
-        /* Anything else */
-        } else {
-            /* Process the token as if the insertion mode was "in table". */
-            $this->inTable($token);
-        }
-    }
-
-    private function inCell($token) {
-        /* An end tag whose tag name is one of: "td", "th" */
-        if($token['type'] === HTML5::ENDTAG &&
-        ($token['name'] === 'td' || $token['name'] === 'th')) {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as that of the token, then this is a
-            parse error and the token must be ignored. */
-            if(!$this->elementInScope($token['name'], true)) {
-                // Ignore.
-
-            /* Otherwise: */
-            } else {
-                /* Generate implied end tags, except for elements with the same
-                tag name as the token. */
-                $this->generateImpliedEndTags(array($token['name']));
-
-                /* Now, if the current node is not an element with the same tag
-                name as the token, then this is a parse error. */
-                // k
-
-                /* Pop elements from this stack until an element with the same
-                tag name as the token has been popped from the stack. */
-                while(true) {
-                    $node = end($this->stack)->nodeName;
-                    array_pop($this->stack);
-
-                    if($node === $token['name']) {
-                        break;
-                    }
-                }
-
-                /* Clear the list of active formatting elements up to the last
-                marker. */
-                $this->clearTheActiveFormattingElementsUpToTheLastMarker();
-
-                /* Switch the insertion mode to "in row". (The current node
-                will be a tr element at this point.) */
-                $this->mode = self::IN_ROW;
-            }
-
-        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
-        "tbody", "td", "tfoot", "th", "thead", "tr" */
-        } elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('caption', 'col', 'colgroup', 'tbody', 'td', 'tfoot', 'th',
-        'thead', 'tr'))) {
-            /* If the stack of open elements does not have a td or th element
-            in table scope, then this is a parse error; ignore the token.
-            (innerHTML case) */
-            if(!$this->elementInScope(array('td', 'th'), true)) {
-                // Ignore.
-
-            /* Otherwise, close the cell (see below) and reprocess the current
-            token. */
-            } else {
-                $this->closeCell();
-                return $this->inRow($token);
-            }
-
-        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
-        "tbody", "td", "tfoot", "th", "thead", "tr" */
-        } elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
-        array('caption', 'col', 'colgroup', 'tbody', 'td', 'tfoot', 'th',
-        'thead', 'tr'))) {
-            /* If the stack of open elements does not have a td or th element
-            in table scope, then this is a parse error; ignore the token.
-            (innerHTML case) */
-            if(!$this->elementInScope(array('td', 'th'), true)) {
-                // Ignore.
-
-            /* Otherwise, close the cell (see below) and reprocess the current
-            token. */
-            } else {
-                $this->closeCell();
-                return $this->inRow($token);
-            }
-
-        /* An end tag whose tag name is one of: "body", "caption", "col",
-        "colgroup", "html" */
-        } elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
-        array('body', 'caption', 'col', 'colgroup', 'html'))) {
-            /* Parse error. Ignore the token. */
-
-        /* An end tag whose tag name is one of: "table", "tbody", "tfoot",
-        "thead", "tr" */
-        } elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
-        array('table', 'tbody', 'tfoot', 'thead', 'tr'))) {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as that of the token (which can only
-            happen for "tbody", "tfoot" and "thead", or, in the innerHTML case),
-            then this is a parse error and the token must be ignored. */
-            if(!$this->elementInScope($token['name'], true)) {
-                // Ignore.
-
-            /* Otherwise, close the cell (see below) and reprocess the current
-            token. */
-            } else {
-                $this->closeCell();
-                return $this->inRow($token);
-            }
-
-        /* Anything else */
-        } else {
-            /* Process the token as if the insertion mode was "in body". */
-            $this->inBody($token);
-        }
-    }
-
-    private function inSelect($token) {
-        /* Handle the token as follows: */
-
-        /* A character token */
-        if($token['type'] === HTML5::CHARACTR) {
-            /* Append the token's character to the current node. */
-            $this->insertText($token['data']);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data
-            attribute set to the data given in the comment token. */
-            $this->insertComment($token['data']);
-
-        /* A start tag token whose tag name is "option" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        $token['name'] === 'option') {
-            /* If the current node is an option element, act as if an end tag
-            with the tag name "option" had been seen. */
-            if(end($this->stack)->nodeName === 'option') {
-                $this->inSelect(array(
-                    'name' => 'option',
-                    'type' => HTML5::ENDTAG
-                ));
-            }
-
-            /* Insert an HTML element for the token. */
-            $this->insertElement($token);
-
-        /* A start tag token whose tag name is "optgroup" */
-        } elseif($token['type'] === HTML5::STARTTAG &&
-        $token['name'] === 'optgroup') {
-            /* If the current node is an option element, act as if an end tag
-            with the tag name "option" had been seen. */
-            if(end($this->stack)->nodeName === 'option') {
-                $this->inSelect(array(
-                    'name' => 'option',
-                    'type' => HTML5::ENDTAG
-                ));
-            }
-
-            /* If the current node is an optgroup element, act as if an end tag
-            with the tag name "optgroup" had been seen. */
-            if(end($this->stack)->nodeName === 'optgroup') {
-                $this->inSelect(array(
-                    'name' => 'optgroup',
-                    'type' => HTML5::ENDTAG
-                ));
-            }
-
-            /* Insert an HTML element for the token. */
-            $this->insertElement($token);
-
-        /* An end tag token whose tag name is "optgroup" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        $token['name'] === 'optgroup') {
-            /* First, if the current node is an option element, and the node
-            immediately before it in the stack of open elements is an optgroup
-            element, then act as if an end tag with the tag name "option" had
-            been seen. */
-            $elements_in_stack = count($this->stack);
-
-            if($this->stack[$elements_in_stack - 1]->nodeName === 'option' &&
-            $this->stack[$elements_in_stack - 2]->nodeName === 'optgroup') {
-                $this->inSelect(array(
-                    'name' => 'option',
-                    'type' => HTML5::ENDTAG
-                ));
-            }
-
-            /* If the current node is an optgroup element, then pop that node
-            from the stack of open elements. Otherwise, this is a parse error,
-            ignore the token. */
-            if($this->stack[$elements_in_stack - 1] === 'optgroup') {
-                array_pop($this->stack);
-            }
-
-        /* An end tag token whose tag name is "option" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        $token['name'] === 'option') {
-            /* If the current node is an option element, then pop that node
-            from the stack of open elements. Otherwise, this is a parse error,
-            ignore the token. */
-            if(end($this->stack)->nodeName === 'option') {
-                array_pop($this->stack);
-            }
-
-        /* An end tag whose tag name is "select" */
-        } elseif($token['type'] === HTML5::ENDTAG &&
-        $token['name'] === 'select') {
-            /* If the stack of open elements does not have an element in table
-            scope with the same tag name as the token, this is a parse error.
-            Ignore the token. (innerHTML case) */
-            if(!$this->elementInScope($token['name'], true)) {
-                // w/e
-
-            /* Otherwise: */
-            } else {
-                /* Pop elements from the stack of open elements until a select
-                element has been popped from the stack. */
-                while(true) {
-                    $current = end($this->stack)->nodeName;
-                    array_pop($this->stack);
-
-                    if($current === 'select') {
-                        break;
-                    }
-                }
-
-                /* Reset the insertion mode appropriately. */
-                $this->resetInsertionMode();
-            }
-
-        /* A start tag whose tag name is "select" */
-        } elseif($token['name'] === 'select' &&
-        $token['type'] === HTML5::STARTTAG) {
-            /* Parse error. Act as if the token had been an end tag with the
-            tag name "select" instead. */
-            $this->inSelect(array(
-                'name' => 'select',
-                'type' => HTML5::ENDTAG
-            ));
-
-        /* An end tag whose tag name is one of: "caption", "table", "tbody",
-        "tfoot", "thead", "tr", "td", "th" */
-        } elseif(in_array($token['name'], array('caption', 'table', 'tbody',
-        'tfoot', 'thead', 'tr', 'td', 'th')) && $token['type'] === HTML5::ENDTAG) {
-            /* Parse error. */
-            // w/e
-
-            /* If the stack of open elements has an element in table scope with
-            the same tag name as that of the token, then act as if an end tag
-            with the tag name "select" had been seen, and reprocess the token.
-            Otherwise, ignore the token. */
-            if($this->elementInScope($token['name'], true)) {
-                $this->inSelect(array(
-                    'name' => 'select',
-                    'type' => HTML5::ENDTAG
-                ));
-
-                $this->mainPhase($token);
-            }
-
-        /* Anything else */
-        } else {
-            /* Parse error. Ignore the token. */
-        }
-    }
-
-    private function afterBody($token) {
-        /* Handle the token as follows: */
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Process the token as it would be processed if the insertion mode
-            was "in body". */
-            $this->inBody($token);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the first element in the stack of open
-            elements (the html element), with the data attribute set to the
-            data given in the comment token. */
-            $comment = $this->dom->createComment($token['data']);
-            $this->stack[0]->appendChild($comment);
-
-        /* An end tag with the tag name "html" */
-        } elseif($token['type'] === HTML5::ENDTAG && $token['name'] === 'html') {
-            /* If the parser was originally created in order to handle the
-            setting of an element's innerHTML attribute, this is a parse error;
-            ignore the token. (The element will be an html element in this
-            case.) (innerHTML case) */
-
-            /* Otherwise, switch to the trailing end phase. */
-            $this->phase = self::END_PHASE;
-
-        /* Anything else */
-        } else {
-            /* Parse error. Set the insertion mode to "in body" and reprocess
-            the token. */
-            $this->mode = self::IN_BODY;
-            return $this->inBody($token);
-        }
-    }
-
-    private function inFrameset($token) {
-        /* Handle the token as follows: */
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        U+000D CARRIAGE RETURN (CR), or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append the character to the current node. */
-            $this->insertText($token['data']);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data
-            attribute set to the data given in the comment token. */
-            $this->insertComment($token['data']);
-
-        /* A start tag with the tag name "frameset" */
-        } elseif($token['name'] === 'frameset' &&
-        $token['type'] === HTML5::STARTTAG) {
-            $this->insertElement($token);
-
-        /* An end tag with the tag name "frameset" */
-        } elseif($token['name'] === 'frameset' &&
-        $token['type'] === HTML5::ENDTAG) {
-            /* If the current node is the root html element, then this is a
-            parse error; ignore the token. (innerHTML case) */
-            if(end($this->stack)->nodeName === 'html') {
-                // Ignore
-
-            } else {
-                /* Otherwise, pop the current node from the stack of open
-                elements. */
-                array_pop($this->stack);
-
-                /* If the parser was not originally created in order to handle
-                the setting of an element's innerHTML attribute (innerHTML case),
-                and the current node is no longer a frameset element, then change
-                the insertion mode to "after frameset". */
-                $this->mode = self::AFTR_FRAME;
-            }
-
-        /* A start tag with the tag name "frame" */
-        } elseif($token['name'] === 'frame' &&
-        $token['type'] === HTML5::STARTTAG) {
-            /* Insert an HTML element for the token. */
-            $this->insertElement($token);
-
-            /* Immediately pop the current node off the stack of open elements. */
-            array_pop($this->stack);
-
-        /* A start tag with the tag name "noframes" */
-        } elseif($token['name'] === 'noframes' &&
-        $token['type'] === HTML5::STARTTAG) {
-            /* Process the token as if the insertion mode had been "in body". */
-            $this->inBody($token);
-
-        /* Anything else */
-        } else {
-            /* Parse error. Ignore the token. */
-        }
-    }
-
-    private function afterFrameset($token) {
-        /* Handle the token as follows: */
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        U+000D CARRIAGE RETURN (CR), or U+0020 SPACE */
-        if($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Append the character to the current node. */
-            $this->insertText($token['data']);
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the current node with the data
-            attribute set to the data given in the comment token. */
-            $this->insertComment($token['data']);
-
-        /* An end tag with the tag name "html" */
-        } elseif($token['name'] === 'html' &&
-        $token['type'] === HTML5::ENDTAG) {
-            /* Switch to the trailing end phase. */
-            $this->phase = self::END_PHASE;
-
-        /* A start tag with the tag name "noframes" */
-        } elseif($token['name'] === 'noframes' &&
-        $token['type'] === HTML5::STARTTAG) {
-            /* Process the token as if the insertion mode had been "in body". */
-            $this->inBody($token);
-
-        /* Anything else */
-        } else {
-            /* Parse error. Ignore the token. */
-        }
-    }
-
-    private function trailingEndPhase($token) {
-        /* After the main phase, as each token is emitted from the tokenisation
-        stage, it must be processed as described in this section. */
-
-        /* A DOCTYPE token */
-        if($token['type'] === HTML5::DOCTYPE) {
-            // Parse error. Ignore the token.
-
-        /* A comment token */
-        } elseif($token['type'] === HTML5::COMMENT) {
-            /* Append a Comment node to the Document object with the data
-            attribute set to the data given in the comment token. */
-            $comment = $this->dom->createComment($token['data']);
-            $this->dom->appendChild($comment);
-
-        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE */
-        } elseif($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
-            /* Process the token as it would be processed in the main phase. */
-            $this->mainPhase($token);
-
-        /* A character token that is not one of U+0009 CHARACTER TABULATION,
-        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
-        or U+0020 SPACE. Or a start tag token. Or an end tag token. */
-        } elseif(($token['type'] === HTML5::CHARACTR &&
-        preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) ||
-        $token['type'] === HTML5::STARTTAG || $token['type'] === HTML5::ENDTAG) {
-            /* Parse error. Switch back to the main phase and reprocess the
-            token. */
-            $this->phase = self::MAIN_PHASE;
-            return $this->mainPhase($token);
-
-        /* An end-of-file token */
-        } elseif($token['type'] === HTML5::EOF) {
-            /* OMG DONE!! */
-        }
-    }
-
-    private function insertElement($token, $append = true, $check = false) {
-        // Proprietary workaround for libxml2's limitations with tag names
-        if ($check) {
-            // Slightly modified HTML5 tag-name modification,
-            // removing anything that's not an ASCII letter, digit, or hyphen
-            $token['name'] = preg_replace('/[^a-z0-9-]/i', '', $token['name']);
-            // Remove leading hyphens and numbers
-            $token['name'] = ltrim($token['name'], '-0..9');
-            // In theory, this should ever be needed, but just in case
-            if ($token['name'] === '') $token['name'] = 'span'; // arbitrary generic choice
-        }
-        
-        $el = $this->dom->createElement($token['name']);
-
-        foreach($token['attr'] as $attr) {
-            if(!$el->hasAttribute($attr['name'])) {
-                $el->setAttribute($attr['name'], $attr['value']);
-            }
-        }
-
-        $this->appendToRealParent($el);
-        $this->stack[] = $el;
-
-        return $el;
-    }
-
-    private function insertText($data) {
-        $text = $this->dom->createTextNode($data);
-        $this->appendToRealParent($text);
-    }
-
-    private function insertComment($data) {
-        $comment = $this->dom->createComment($data);
-        $this->appendToRealParent($comment);
-    }
-
-    private function appendToRealParent($node) {
-        if($this->foster_parent === null) {
-            end($this->stack)->appendChild($node);
-
-        } elseif($this->foster_parent !== null) {
-            /* If the foster parent element is the parent element of the
-            last table element in the stack of open elements, then the new
-            node must be inserted immediately before the last table element
-            in the stack of open elements in the foster parent element;
-            otherwise, the new node must be appended to the foster parent
-            element. */
-            for($n = count($this->stack) - 1; $n >= 0; $n--) {
-                if($this->stack[$n]->nodeName === 'table' &&
-                $this->stack[$n]->parentNode !== null) {
-                    $table = $this->stack[$n];
-                    break;
-                }
-            }
-
-            if(isset($table) && $this->foster_parent->isSameNode($table->parentNode))
-                $this->foster_parent->insertBefore($node, $table);
-            else
-                $this->foster_parent->appendChild($node);
-
-            $this->foster_parent = null;
-        }
-    }
-
-    private function elementInScope($el, $table = false) {
-        if(is_array($el)) {
-            foreach($el as $element) {
-                if($this->elementInScope($element, $table)) {
-                    return true;
-                }
-            }
-
-            return false;
-        }
-
-        $leng = count($this->stack);
-
-        for($n = 0; $n < $leng; $n++) {
-            /* 1. Initialise node to be the current node (the bottommost node of
-            the stack). */
-            $node = $this->stack[$leng - 1 - $n];
-
-            if($node->tagName === $el) {
-                /* 2. If node is the target node, terminate in a match state. */
-                return true;
-
-            } elseif($node->tagName === 'table') {
-                /* 3. Otherwise, if node is a table element, terminate in a failure
-                state. */
-                return false;
-
-            } elseif($table === true && in_array($node->tagName, array('caption', 'td',
-            'th', 'button', 'marquee', 'object'))) {
-                /* 4. Otherwise, if the algorithm is the "has an element in scope"
-                variant (rather than the "has an element in table scope" variant),
-                and node is one of the following, terminate in a failure state. */
-                return false;
-
-            } elseif($node === $node->ownerDocument->documentElement) {
-                /* 5. Otherwise, if node is an html element (root element), terminate
-                in a failure state. (This can only happen if the node is the topmost
-                node of the    stack of open elements, and prevents the next step from
-                being invoked if there are no more elements in the stack.) */
-                return false;
-            }
-
-            /* Otherwise, set node to the previous entry in the stack of open
-            elements and return to step 2. (This will never fail, since the loop
-            will always terminate in the previous step if the top of the stack
-            is reached.) */
-        }
-    }
-
-    private function reconstructActiveFormattingElements() {
-        /* 1. If there are no entries in the list of active formatting elements,
-        then there is nothing to reconstruct; stop this algorithm. */
-        $formatting_elements = count($this->a_formatting);
-
-        if($formatting_elements === 0) {
-            return false;
-        }
-
-        /* 3. Let entry be the last (most recently added) element in the list
-        of active formatting elements. */
-        $entry = end($this->a_formatting);
-
-        /* 2. If the last (most recently added) entry in the list of active
-        formatting elements is a marker, or if it is an element that is in the
-        stack of open elements, then there is nothing to reconstruct; stop this
-        algorithm. */
-        if($entry === self::MARKER || in_array($entry, $this->stack, true)) {
-            return false;
-        }
-
-        for($a = $formatting_elements - 1; $a >= 0; true) {
-            /* 4. If there are no entries before entry in the list of active
-            formatting elements, then jump to step 8. */
-            if($a === 0) {
-                $step_seven = false;
-                break;
-            }
-
-            /* 5. Let entry be the entry one earlier than entry in the list of
-            active formatting elements. */
-            $a--;
-            $entry = $this->a_formatting[$a];
-
-            /* 6. If entry is neither a marker nor an element that is also in
-            thetack of open elements, go to step 4. */
-            if($entry === self::MARKER || in_array($entry, $this->stack, true)) {
-                break;
-            }
-        }
-
-        while(true) {
-            /* 7. Let entry be the element one later than entry in the list of
-            active formatting elements. */
-            if(isset($step_seven) && $step_seven === true) {
-                $a++;
-                $entry = $this->a_formatting[$a];
-            }
-
-            /* 8. Perform a shallow clone of the element entry to obtain clone. */
-            $clone = $entry->cloneNode();
-
-            /* 9. Append clone to the current node and push it onto the stack
-            of open elements  so that it is the new current node. */
-            end($this->stack)->appendChild($clone);
-            $this->stack[] = $clone;
-
-            /* 10. Replace the entry for entry in the list with an entry for
-            clone. */
-            $this->a_formatting[$a] = $clone;
-
-            /* 11. If the entry for clone in the list of active formatting
-            elements is not the last entry in the list, return to step 7. */
-            if(end($this->a_formatting) !== $clone) {
-                $step_seven = true;
-            } else {
-                break;
-            }
-        }
-    }
-
-    private function clearTheActiveFormattingElementsUpToTheLastMarker() {
-        /* When the steps below require the UA to clear the list of active
-        formatting elements up to the last marker, the UA must perform the
-        following steps: */
-
-        while(true) {
-            /* 1. Let entry be the last (most recently added) entry in the list
-            of active formatting elements. */
-            $entry = end($this->a_formatting);
-
-            /* 2. Remove entry from the list of active formatting elements. */
-            array_pop($this->a_formatting);
-
-            /* 3. If entry was a marker, then stop the algorithm at this point.
-            The list has been cleared up to the last marker. */
-            if($entry === self::MARKER) {
-                break;
-            }
-        }
-    }
-
-    private function generateImpliedEndTags($exclude = array()) {
-        /* When the steps below require the UA to generate implied end tags,
-        then, if the current node is a dd element, a dt element, an li element,
-        a p element, a td element, a th  element, or a tr element, the UA must
-        act as if an end tag with the respective tag name had been seen and
-        then generate implied end tags again. */
-        $node = end($this->stack);
-        $elements = array_diff(array('dd', 'dt', 'li', 'p', 'td', 'th', 'tr'), $exclude);
-
-        while(in_array(end($this->stack)->nodeName, $elements)) {
-            array_pop($this->stack);
-        }
-    }
-
-    private function getElementCategory($node) {
-        $name = $node->tagName;
-        if(in_array($name, $this->special))
-            return self::SPECIAL;
-
-        elseif(in_array($name, $this->scoping))
-            return self::SCOPING;
-
-        elseif(in_array($name, $this->formatting))
-            return self::FORMATTING;
-
-        else
-            return self::PHRASING;
-    }
-
-    private function clearStackToTableContext($elements) {
-        /* When the steps above require the UA to clear the stack back to a
-        table context, it means that the UA must, while the current node is not
-        a table element or an html element, pop elements from the stack of open
-        elements. If this causes any elements to be popped from the stack, then
-        this is a parse error. */
-        while(true) {
-            $node = end($this->stack)->nodeName;
-
-            if(in_array($node, $elements)) {
-                break;
-            } else {
-                array_pop($this->stack);
-            }
-        }
-    }
-
-    private function resetInsertionMode() {
-        /* 1. Let last be false. */
-        $last = false;
-        $leng = count($this->stack);
-
-        for($n = $leng - 1; $n >= 0; $n--) {
-            /* 2. Let node be the last node in the stack of open elements. */
-            $node = $this->stack[$n];
-
-            /* 3. If node is the first node in the stack of open elements, then
-            set last to true. If the element whose innerHTML  attribute is being
-            set is neither a td  element nor a th element, then set node to the
-            element whose innerHTML  attribute is being set. (innerHTML  case) */
-            if($this->stack[0]->isSameNode($node)) {
-                $last = true;
-            }
-
-            /* 4. If node is a select element, then switch the insertion mode to
-            "in select" and abort these steps. (innerHTML case) */
-            if($node->nodeName === 'select') {
-                $this->mode = self::IN_SELECT;
-                break;
-
-            /* 5. If node is a td or th element, then switch the insertion mode
-            to "in cell" and abort these steps. */
-            } elseif($node->nodeName === 'td' || $node->nodeName === 'th') {
-                $this->mode = self::IN_CELL;
-                break;
-
-            /* 6. If node is a tr element, then switch the insertion mode to
-            "in    row" and abort these steps. */
-            } elseif($node->nodeName === 'tr') {
-                $this->mode = self::IN_ROW;
-                break;
-
-            /* 7. If node is a tbody, thead, or tfoot element, then switch the
-            insertion mode to "in table body" and abort these steps. */
-            } elseif(in_array($node->nodeName, array('tbody', 'thead', 'tfoot'))) {
-                $this->mode = self::IN_TBODY;
-                break;
-
-            /* 8. If node is a caption element, then switch the insertion mode
-            to "in caption" and abort these steps. */
-            } elseif($node->nodeName === 'caption') {
-                $this->mode = self::IN_CAPTION;
-                break;
-
-            /* 9. If node is a colgroup element, then switch the insertion mode
-            to "in column group" and abort these steps. (innerHTML case) */
-            } elseif($node->nodeName === 'colgroup') {
-                $this->mode = self::IN_CGROUP;
-                break;
-
-            /* 10. If node is a table element, then switch the insertion mode
-            to "in table" and abort these steps. */
-            } elseif($node->nodeName === 'table') {
-                $this->mode = self::IN_TABLE;
-                break;
-
-            /* 11. If node is a head element, then switch the insertion mode
-            to "in body" ("in body"! not "in head"!) and abort these steps.
-            (innerHTML case) */
-            } elseif($node->nodeName === 'head') {
-                $this->mode = self::IN_BODY;
-                break;
-
-            /* 12. If node is a body element, then switch the insertion mode to
-            "in body" and abort these steps. */
-            } elseif($node->nodeName === 'body') {
-                $this->mode = self::IN_BODY;
-                break;
-
-            /* 13. If node is a frameset element, then switch the insertion
-            mode to "in frameset" and abort these steps. (innerHTML case) */
-            } elseif($node->nodeName === 'frameset') {
-                $this->mode = self::IN_FRAME;
-                break;
-
-            /* 14. If node is an html element, then: if the head element
-            pointer is null, switch the insertion mode to "before head",
-            otherwise, switch the insertion mode to "after head". In either
-            case, abort these steps. (innerHTML case) */
-            } elseif($node->nodeName === 'html') {
-                $this->mode = ($this->head_pointer === null)
-                    ? self::BEFOR_HEAD
-                    : self::AFTER_HEAD;
-
-                break;
-
-            /* 15. If last is true, then set the insertion mode to "in body"
-            and    abort these steps. (innerHTML case) */
-            } elseif($last) {
-                $this->mode = self::IN_BODY;
-                break;
-            }
-        }
-    }
-
-    private function closeCell() {
-        /* If the stack of open elements has a td or th element in table scope,
-        then act as if an end tag token with that tag name had been seen. */
-        foreach(array('td', 'th') as $cell) {
-            if($this->elementInScope($cell, true)) {
-                $this->inCell(array(
-                    'name' => $cell,
-                    'type' => HTML5::ENDTAG
-                ));
-
-                break;
-            }
-        }
-    }
-
-    public function save() {
-        return $this->dom;
-    }
-}
-?>
diff --git a/extlib/HTMLPurifier/HTMLPurifier/PercentEncoder.php b/extlib/HTMLPurifier/HTMLPurifier/PercentEncoder.php
deleted file mode 100644
index a43c44f4c5..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/PercentEncoder.php
+++ /dev/null
@@ -1,98 +0,0 @@
-<?php
-
-/**
- * Class that handles operations involving percent-encoding in URIs.
- *
- * @warning
- *      Be careful when reusing instances of PercentEncoder. The object
- *      you use for normalize() SHOULD NOT be used for encode(), or
- *      vice-versa.
- */
-class HTMLPurifier_PercentEncoder
-{
-
-    /**
-     * Reserved characters to preserve when using encode().
-     */
-    protected $preserve = array();
-
-    /**
-     * String of characters that should be preserved while using encode().
-     */
-    public function __construct($preserve = false) {
-        // unreserved letters, ought to const-ify
-        for ($i = 48; $i <= 57;  $i++) $this->preserve[$i] = true; // digits
-        for ($i = 65; $i <= 90;  $i++) $this->preserve[$i] = true; // upper-case
-        for ($i = 97; $i <= 122; $i++) $this->preserve[$i] = true; // lower-case
-        $this->preserve[45] = true; // Dash         -
-        $this->preserve[46] = true; // Period       .
-        $this->preserve[95] = true; // Underscore   _
-        $this->preserve[126]= true; // Tilde        ~
-
-        // extra letters not to escape
-        if ($preserve !== false) {
-            for ($i = 0, $c = strlen($preserve); $i < $c; $i++) {
-                $this->preserve[ord($preserve[$i])] = true;
-            }
-        }
-    }
-
-    /**
-     * Our replacement for urlencode, it encodes all non-reserved characters,
-     * as well as any extra characters that were instructed to be preserved.
-     * @note
-     *      Assumes that the string has already been normalized, making any
-     *      and all percent escape sequences valid. Percents will not be
-     *      re-escaped, regardless of their status in $preserve
-     * @param $string String to be encoded
-     * @return Encoded string.
-     */
-    public function encode($string) {
-        $ret = '';
-        for ($i = 0, $c = strlen($string); $i < $c; $i++) {
-            if ($string[$i] !== '%' && !isset($this->preserve[$int = ord($string[$i])]) ) {
-                $ret .= '%' . sprintf('%02X', $int);
-            } else {
-                $ret .= $string[$i];
-            }
-        }
-        return $ret;
-    }
-
-    /**
-     * Fix up percent-encoding by decoding unreserved characters and normalizing.
-     * @warning This function is affected by $preserve, even though the
-     *          usual desired behavior is for this not to preserve those
-     *          characters. Be careful when reusing instances of PercentEncoder!
-     * @param $string String to normalize
-     */
-    public function normalize($string) {
-        if ($string == '') return '';
-        $parts = explode('%', $string);
-        $ret = array_shift($parts);
-        foreach ($parts as $part) {
-            $length = strlen($part);
-            if ($length < 2) {
-                $ret .= '%25' . $part;
-                continue;
-            }
-            $encoding = substr($part, 0, 2);
-            $text     = substr($part, 2);
-            if (!ctype_xdigit($encoding)) {
-                $ret .= '%25' . $part;
-                continue;
-            }
-            $int = hexdec($encoding);
-            if (isset($this->preserve[$int])) {
-                $ret .= chr($int) . $text;
-                continue;
-            }
-            $encoding = strtoupper($encoding);
-            $ret .= '%' . $encoding . $text;
-        }
-        return $ret;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Printer.php b/extlib/HTMLPurifier/HTMLPurifier/Printer.php
deleted file mode 100644
index e7eb82e83e..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Printer.php
+++ /dev/null
@@ -1,176 +0,0 @@
-<?php
-
-// OUT OF DATE, NEEDS UPDATING!
-// USE XMLWRITER!
-
-class HTMLPurifier_Printer
-{
-
-    /**
-     * Instance of HTMLPurifier_Generator for HTML generation convenience funcs
-     */
-    protected $generator;
-
-    /**
-     * Instance of HTMLPurifier_Config, for easy access
-     */
-    protected $config;
-
-    /**
-     * Initialize $generator.
-     */
-    public function __construct() {
-    }
-
-    /**
-     * Give generator necessary configuration if possible
-     */
-    public function prepareGenerator($config) {
-        $all = $config->getAll();
-        $context = new HTMLPurifier_Context();
-        $this->generator = new HTMLPurifier_Generator($config, $context);
-    }
-
-    /**
-     * Main function that renders object or aspect of that object
-     * @note Parameters vary depending on printer
-     */
-    // function render() {}
-
-    /**
-     * Returns a start tag
-     * @param $tag Tag name
-     * @param $attr Attribute array
-     */
-    protected function start($tag, $attr = array()) {
-        return $this->generator->generateFromToken(
-                    new HTMLPurifier_Token_Start($tag, $attr ? $attr : array())
-               );
-    }
-
-    /**
-     * Returns an end teg
-     * @param $tag Tag name
-     */
-    protected function end($tag) {
-        return $this->generator->generateFromToken(
-                    new HTMLPurifier_Token_End($tag)
-               );
-    }
-
-    /**
-     * Prints a complete element with content inside
-     * @param $tag Tag name
-     * @param $contents Element contents
-     * @param $attr Tag attributes
-     * @param $escape Bool whether or not to escape contents
-     */
-    protected function element($tag, $contents, $attr = array(), $escape = true) {
-        return $this->start($tag, $attr) .
-               ($escape ? $this->escape($contents) : $contents) .
-               $this->end($tag);
-    }
-
-    protected function elementEmpty($tag, $attr = array()) {
-        return $this->generator->generateFromToken(
-            new HTMLPurifier_Token_Empty($tag, $attr)
-        );
-    }
-
-    protected function text($text) {
-        return $this->generator->generateFromToken(
-            new HTMLPurifier_Token_Text($text)
-        );
-    }
-
-    /**
-     * Prints a simple key/value row in a table.
-     * @param $name Key
-     * @param $value Value
-     */
-    protected function row($name, $value) {
-        if (is_bool($value)) $value = $value ? 'On' : 'Off';
-        return
-            $this->start('tr') . "\n" .
-                $this->element('th', $name) . "\n" .
-                $this->element('td', $value) . "\n" .
-            $this->end('tr')
-        ;
-    }
-
-    /**
-     * Escapes a string for HTML output.
-     * @param $string String to escape
-     */
-    protected function escape($string) {
-        $string = HTMLPurifier_Encoder::cleanUTF8($string);
-        $string = htmlspecialchars($string, ENT_COMPAT, 'UTF-8');
-        return $string;
-    }
-
-    /**
-     * Takes a list of strings and turns them into a single list
-     * @param $array List of strings
-     * @param $polite Bool whether or not to add an end before the last
-     */
-    protected function listify($array, $polite = false) {
-        if (empty($array)) return 'None';
-        $ret = '';
-        $i = count($array);
-        foreach ($array as $value) {
-            $i--;
-            $ret .= $value;
-            if ($i > 0 && !($polite && $i == 1)) $ret .= ', ';
-            if ($polite && $i == 1) $ret .= 'and ';
-        }
-        return $ret;
-    }
-
-    /**
-     * Retrieves the class of an object without prefixes, as well as metadata
-     * @param $obj Object to determine class of
-     * @param $prefix Further prefix to remove
-     */
-    protected function getClass($obj, $sec_prefix = '') {
-        static $five = null;
-        if ($five === null) $five = version_compare(PHP_VERSION, '5', '>=');
-        $prefix = 'HTMLPurifier_' . $sec_prefix;
-        if (!$five) $prefix = strtolower($prefix);
-        $class = str_replace($prefix, '', get_class($obj));
-        $lclass = strtolower($class);
-        $class .= '(';
-        switch ($lclass) {
-            case 'enum':
-                $values = array();
-                foreach ($obj->valid_values as $value => $bool) {
-                    $values[] = $value;
-                }
-                $class .= implode(', ', $values);
-                break;
-            case 'css_composite':
-                $values = array();
-                foreach ($obj->defs as $def) {
-                    $values[] = $this->getClass($def, $sec_prefix);
-                }
-                $class .= implode(', ', $values);
-                break;
-            case 'css_multiple':
-                $class .= $this->getClass($obj->single, $sec_prefix) . ', ';
-                $class .= $obj->max;
-                break;
-            case 'css_denyelementdecorator':
-                $class .= $this->getClass($obj->def, $sec_prefix) . ', ';
-                $class .= $obj->element;
-                break;
-            case 'css_importantdecorator':
-                $class .= $this->getClass($obj->def, $sec_prefix);
-                if ($obj->allow) $class .= ', !important';
-                break;
-        }
-        $class .= ')';
-        return $class;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Printer/CSSDefinition.php b/extlib/HTMLPurifier/HTMLPurifier/Printer/CSSDefinition.php
deleted file mode 100644
index 81f9865901..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Printer/CSSDefinition.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-
-class HTMLPurifier_Printer_CSSDefinition extends HTMLPurifier_Printer
-{
-
-    protected $def;
-
-    public function render($config) {
-        $this->def = $config->getCSSDefinition();
-        $ret = '';
-
-        $ret .= $this->start('div', array('class' => 'HTMLPurifier_Printer'));
-        $ret .= $this->start('table');
-
-        $ret .= $this->element('caption', 'Properties ($info)');
-
-        $ret .= $this->start('thead');
-        $ret .= $this->start('tr');
-        $ret .= $this->element('th', 'Property', array('class' => 'heavy'));
-        $ret .= $this->element('th', 'Definition', array('class' => 'heavy', 'style' => 'width:auto;'));
-        $ret .= $this->end('tr');
-        $ret .= $this->end('thead');
-
-        ksort($this->def->info);
-        foreach ($this->def->info as $property => $obj) {
-            $name = $this->getClass($obj, 'AttrDef_');
-            $ret .= $this->row($property, $name);
-        }
-
-        $ret .= $this->end('table');
-        $ret .= $this->end('div');
-
-        return $ret;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Printer/ConfigForm.css b/extlib/HTMLPurifier/HTMLPurifier/Printer/ConfigForm.css
deleted file mode 100644
index 3ff1a88aa4..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Printer/ConfigForm.css
+++ /dev/null
@@ -1,10 +0,0 @@
-
-.hp-config {}
-
-.hp-config tbody th {text-align:right; padding-right:0.5em;}
-.hp-config thead, .hp-config .namespace {background:#3C578C; color:#FFF;}
-.hp-config .namespace th {text-align:center;}
-.hp-config .verbose {display:none;}
-.hp-config .controls {text-align:center;}
-
-/* vim: et sw=4 sts=4 */
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Printer/ConfigForm.js b/extlib/HTMLPurifier/HTMLPurifier/Printer/ConfigForm.js
deleted file mode 100644
index cba00c9b80..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Printer/ConfigForm.js
+++ /dev/null
@@ -1,5 +0,0 @@
-function toggleWriteability(id_of_patient, checked) {
-    document.getElementById(id_of_patient).disabled = checked;
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Printer/ConfigForm.php b/extlib/HTMLPurifier/HTMLPurifier/Printer/ConfigForm.php
deleted file mode 100644
index 02aa656894..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Printer/ConfigForm.php
+++ /dev/null
@@ -1,368 +0,0 @@
-<?php
-
-/**
- * @todo Rewrite to use Interchange objects
- */
-class HTMLPurifier_Printer_ConfigForm extends HTMLPurifier_Printer
-{
-
-    /**
-     * Printers for specific fields
-     */
-    protected $fields = array();
-
-    /**
-     * Documentation URL, can have fragment tagged on end
-     */
-    protected $docURL;
-
-    /**
-     * Name of form element to stuff config in
-     */
-    protected $name;
-
-    /**
-     * Whether or not to compress directive names, clipping them off
-     * after a certain amount of letters. False to disable or integer letters
-     * before clipping.
-     */
-    protected $compress = false;
-
-    /**
-     * @param $name Form element name for directives to be stuffed into
-     * @param $doc_url String documentation URL, will have fragment tagged on
-     * @param $compress Integer max length before compressing a directive name, set to false to turn off
-     */
-    public function __construct(
-        $name, $doc_url = null, $compress = false
-    ) {
-        parent::__construct();
-        $this->docURL = $doc_url;
-        $this->name   = $name;
-        $this->compress = $compress;
-        // initialize sub-printers
-        $this->fields[0]    = new HTMLPurifier_Printer_ConfigForm_default();
-        $this->fields[HTMLPurifier_VarParser::BOOL]       = new HTMLPurifier_Printer_ConfigForm_bool();
-    }
-
-    /**
-     * Sets default column and row size for textareas in sub-printers
-     * @param $cols Integer columns of textarea, null to use default
-     * @param $rows Integer rows of textarea, null to use default
-     */
-    public function setTextareaDimensions($cols = null, $rows = null) {
-        if ($cols) $this->fields['default']->cols = $cols;
-        if ($rows) $this->fields['default']->rows = $rows;
-    }
-
-    /**
-     * Retrieves styling, in case it is not accessible by webserver
-     */
-    public static function getCSS() {
-        return file_get_contents(HTMLPURIFIER_PREFIX . '/HTMLPurifier/Printer/ConfigForm.css');
-    }
-
-    /**
-     * Retrieves JavaScript, in case it is not accessible by webserver
-     */
-    public static function getJavaScript() {
-        return file_get_contents(HTMLPURIFIER_PREFIX . '/HTMLPurifier/Printer/ConfigForm.js');
-    }
-
-    /**
-     * Returns HTML output for a configuration form
-     * @param $config Configuration object of current form state, or an array
-     *        where [0] has an HTML namespace and [1] is being rendered.
-     * @param $allowed Optional namespace(s) and directives to restrict form to.
-     */
-    public function render($config, $allowed = true, $render_controls = true) {
-        if (is_array($config) && isset($config[0])) {
-            $gen_config = $config[0];
-            $config = $config[1];
-        } else {
-            $gen_config = $config;
-        }
-
-        $this->config = $config;
-        $this->genConfig = $gen_config;
-        $this->prepareGenerator($gen_config);
-
-        $allowed = HTMLPurifier_Config::getAllowedDirectivesForForm($allowed, $config->def);
-        $all = array();
-        foreach ($allowed as $key) {
-            list($ns, $directive) = $key;
-            $all[$ns][$directive] = $config->get($ns .'.'. $directive);
-        }
-
-        $ret = '';
-        $ret .= $this->start('table', array('class' => 'hp-config'));
-        $ret .= $this->start('thead');
-        $ret .= $this->start('tr');
-            $ret .= $this->element('th', 'Directive', array('class' => 'hp-directive'));
-            $ret .= $this->element('th', 'Value', array('class' => 'hp-value'));
-        $ret .= $this->end('tr');
-        $ret .= $this->end('thead');
-        foreach ($all as $ns => $directives) {
-            $ret .= $this->renderNamespace($ns, $directives);
-        }
-        if ($render_controls) {
-             $ret .= $this->start('tbody');
-             $ret .= $this->start('tr');
-                 $ret .= $this->start('td', array('colspan' => 2, 'class' => 'controls'));
-                     $ret .= $this->elementEmpty('input', array('type' => 'submit', 'value' => 'Submit'));
-                     $ret .= '[<a href="?">Reset</a>]';
-                 $ret .= $this->end('td');
-             $ret .= $this->end('tr');
-             $ret .= $this->end('tbody');
-        }
-        $ret .= $this->end('table');
-        return $ret;
-    }
-
-    /**
-     * Renders a single namespace
-     * @param $ns String namespace name
-     * @param $directive Associative array of directives to values
-     */
-    protected function renderNamespace($ns, $directives) {
-        $ret = '';
-        $ret .= $this->start('tbody', array('class' => 'namespace'));
-        $ret .= $this->start('tr');
-            $ret .= $this->element('th', $ns, array('colspan' => 2));
-        $ret .= $this->end('tr');
-        $ret .= $this->end('tbody');
-        $ret .= $this->start('tbody');
-        foreach ($directives as $directive => $value) {
-            $ret .= $this->start('tr');
-            $ret .= $this->start('th');
-            if ($this->docURL) {
-                $url = str_replace('%s', urlencode("$ns.$directive"), $this->docURL);
-                $ret .= $this->start('a', array('href' => $url));
-            }
-                $attr = array('for' => "{$this->name}:$ns.$directive");
-
-                // crop directive name if it's too long
-                if (!$this->compress || (strlen($directive) < $this->compress)) {
-                    $directive_disp = $directive;
-                } else {
-                    $directive_disp = substr($directive, 0, $this->compress - 2) . '...';
-                    $attr['title'] = $directive;
-                }
-
-                $ret .= $this->element(
-                    'label',
-                    $directive_disp,
-                    // component printers must create an element with this id
-                    $attr
-                );
-            if ($this->docURL) $ret .= $this->end('a');
-            $ret .= $this->end('th');
-
-            $ret .= $this->start('td');
-                $def = $this->config->def->info["$ns.$directive"];
-                if (is_int($def)) {
-                    $allow_null = $def < 0;
-                    $type = abs($def);
-                } else {
-                    $type = $def->type;
-                    $allow_null = isset($def->allow_null);
-                }
-                if (!isset($this->fields[$type])) $type = 0; // default
-                $type_obj = $this->fields[$type];
-                if ($allow_null) {
-                    $type_obj = new HTMLPurifier_Printer_ConfigForm_NullDecorator($type_obj);
-                }
-                $ret .= $type_obj->render($ns, $directive, $value, $this->name, array($this->genConfig, $this->config));
-            $ret .= $this->end('td');
-            $ret .= $this->end('tr');
-        }
-        $ret .= $this->end('tbody');
-        return $ret;
-    }
-
-}
-
-/**
- * Printer decorator for directives that accept null
- */
-class HTMLPurifier_Printer_ConfigForm_NullDecorator extends HTMLPurifier_Printer {
-    /**
-     * Printer being decorated
-     */
-    protected $obj;
-    /**
-     * @param $obj Printer to decorate
-     */
-    public function __construct($obj) {
-        parent::__construct();
-        $this->obj = $obj;
-    }
-    public function render($ns, $directive, $value, $name, $config) {
-        if (is_array($config) && isset($config[0])) {
-            $gen_config = $config[0];
-            $config = $config[1];
-        } else {
-            $gen_config = $config;
-        }
-        $this->prepareGenerator($gen_config);
-
-        $ret = '';
-        $ret .= $this->start('label', array('for' => "$name:Null_$ns.$directive"));
-        $ret .= $this->element('span', "$ns.$directive:", array('class' => 'verbose'));
-        $ret .= $this->text(' Null/Disabled');
-        $ret .= $this->end('label');
-        $attr = array(
-            'type' => 'checkbox',
-            'value' => '1',
-            'class' => 'null-toggle',
-            'name' => "$name"."[Null_$ns.$directive]",
-            'id' => "$name:Null_$ns.$directive",
-            'onclick' => "toggleWriteability('$name:$ns.$directive',checked)" // INLINE JAVASCRIPT!!!!
-        );
-        if ($this->obj instanceof HTMLPurifier_Printer_ConfigForm_bool) {
-            // modify inline javascript slightly
-            $attr['onclick'] = "toggleWriteability('$name:Yes_$ns.$directive',checked);toggleWriteability('$name:No_$ns.$directive',checked)";
-        }
-        if ($value === null) $attr['checked'] = 'checked';
-        $ret .= $this->elementEmpty('input', $attr);
-        $ret .= $this->text(' or ');
-        $ret .= $this->elementEmpty('br');
-        $ret .= $this->obj->render($ns, $directive, $value, $name, array($gen_config, $config));
-        return $ret;
-    }
-}
-
-/**
- * Swiss-army knife configuration form field printer
- */
-class HTMLPurifier_Printer_ConfigForm_default extends HTMLPurifier_Printer {
-    public $cols = 18;
-    public $rows = 5;
-    public function render($ns, $directive, $value, $name, $config) {
-        if (is_array($config) && isset($config[0])) {
-            $gen_config = $config[0];
-            $config = $config[1];
-        } else {
-            $gen_config = $config;
-        }
-        $this->prepareGenerator($gen_config);
-        // this should probably be split up a little
-        $ret = '';
-        $def = $config->def->info["$ns.$directive"];
-        if (is_int($def)) {
-            $type = abs($def);
-        } else {
-            $type = $def->type;
-        }
-        if (is_array($value)) {
-            switch ($type) {
-                case HTMLPurifier_VarParser::LOOKUP:
-                    $array = $value;
-                    $value = array();
-                    foreach ($array as $val => $b) {
-                        $value[] = $val;
-                    }
-                case HTMLPurifier_VarParser::ALIST:
-                    $value = implode(PHP_EOL, $value);
-                    break;
-                case HTMLPurifier_VarParser::HASH:
-                    $nvalue = '';
-                    foreach ($value as $i => $v) {
-                        $nvalue .= "$i:$v" . PHP_EOL;
-                    }
-                    $value = $nvalue;
-                    break;
-                default:
-                    $value = '';
-            }
-        }
-        if ($type === HTMLPurifier_VarParser::MIXED) {
-            return 'Not supported';
-            $value = serialize($value);
-        }
-        $attr = array(
-            'name' => "$name"."[$ns.$directive]",
-            'id' => "$name:$ns.$directive"
-        );
-        if ($value === null) $attr['disabled'] = 'disabled';
-        if (isset($def->allowed)) {
-            $ret .= $this->start('select', $attr);
-            foreach ($def->allowed as $val => $b) {
-                $attr = array();
-                if ($value == $val) $attr['selected'] = 'selected';
-                $ret .= $this->element('option', $val, $attr);
-            }
-            $ret .= $this->end('select');
-        } elseif (
-            $type === HTMLPurifier_VarParser::TEXT ||
-            $type === HTMLPurifier_VarParser::ITEXT ||
-            $type === HTMLPurifier_VarParser::ALIST ||
-            $type === HTMLPurifier_VarParser::HASH ||
-            $type === HTMLPurifier_VarParser::LOOKUP
-        ) {
-            $attr['cols'] = $this->cols;
-            $attr['rows'] = $this->rows;
-            $ret .= $this->start('textarea', $attr);
-            $ret .= $this->text($value);
-            $ret .= $this->end('textarea');
-        } else {
-            $attr['value'] = $value;
-            $attr['type'] = 'text';
-            $ret .= $this->elementEmpty('input', $attr);
-        }
-        return $ret;
-    }
-}
-
-/**
- * Bool form field printer
- */
-class HTMLPurifier_Printer_ConfigForm_bool extends HTMLPurifier_Printer {
-    public function render($ns, $directive, $value, $name, $config) {
-        if (is_array($config) && isset($config[0])) {
-            $gen_config = $config[0];
-            $config = $config[1];
-        } else {
-            $gen_config = $config;
-        }
-        $this->prepareGenerator($gen_config);
-        $ret = '';
-        $ret .= $this->start('div', array('id' => "$name:$ns.$directive"));
-
-        $ret .= $this->start('label', array('for' => "$name:Yes_$ns.$directive"));
-        $ret .= $this->element('span', "$ns.$directive:", array('class' => 'verbose'));
-        $ret .= $this->text(' Yes');
-        $ret .= $this->end('label');
-
-        $attr = array(
-            'type' => 'radio',
-            'name' => "$name"."[$ns.$directive]",
-            'id' => "$name:Yes_$ns.$directive",
-            'value' => '1'
-        );
-        if ($value === true) $attr['checked'] = 'checked';
-        if ($value === null) $attr['disabled'] = 'disabled';
-        $ret .= $this->elementEmpty('input', $attr);
-
-        $ret .= $this->start('label', array('for' => "$name:No_$ns.$directive"));
-        $ret .= $this->element('span', "$ns.$directive:", array('class' => 'verbose'));
-        $ret .= $this->text(' No');
-        $ret .= $this->end('label');
-
-        $attr = array(
-            'type' => 'radio',
-            'name' => "$name"."[$ns.$directive]",
-            'id' => "$name:No_$ns.$directive",
-            'value' => '0'
-        );
-        if ($value === false) $attr['checked'] = 'checked';
-        if ($value === null) $attr['disabled'] = 'disabled';
-        $ret .= $this->elementEmpty('input', $attr);
-
-        $ret .= $this->end('div');
-
-        return $ret;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Printer/HTMLDefinition.php b/extlib/HTMLPurifier/HTMLPurifier/Printer/HTMLDefinition.php
deleted file mode 100644
index 8a8f126b81..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Printer/HTMLDefinition.php
+++ /dev/null
@@ -1,272 +0,0 @@
-<?php
-
-class HTMLPurifier_Printer_HTMLDefinition extends HTMLPurifier_Printer
-{
-
-    /**
-     * Instance of HTMLPurifier_HTMLDefinition, for easy access
-     */
-    protected $def;
-
-    public function render($config) {
-        $ret = '';
-        $this->config =& $config;
-
-        $this->def = $config->getHTMLDefinition();
-
-        $ret .= $this->start('div', array('class' => 'HTMLPurifier_Printer'));
-
-        $ret .= $this->renderDoctype();
-        $ret .= $this->renderEnvironment();
-        $ret .= $this->renderContentSets();
-        $ret .= $this->renderInfo();
-
-        $ret .= $this->end('div');
-
-        return $ret;
-    }
-
-    /**
-     * Renders the Doctype table
-     */
-    protected function renderDoctype() {
-        $doctype = $this->def->doctype;
-        $ret = '';
-        $ret .= $this->start('table');
-        $ret .= $this->element('caption', 'Doctype');
-        $ret .= $this->row('Name', $doctype->name);
-        $ret .= $this->row('XML', $doctype->xml ? 'Yes' : 'No');
-        $ret .= $this->row('Default Modules', implode($doctype->modules, ', '));
-        $ret .= $this->row('Default Tidy Modules', implode($doctype->tidyModules, ', '));
-        $ret .= $this->end('table');
-        return $ret;
-    }
-
-
-    /**
-     * Renders environment table, which is miscellaneous info
-     */
-    protected function renderEnvironment() {
-        $def = $this->def;
-
-        $ret = '';
-
-        $ret .= $this->start('table');
-        $ret .= $this->element('caption', 'Environment');
-
-        $ret .= $this->row('Parent of fragment', $def->info_parent);
-        $ret .= $this->renderChildren($def->info_parent_def->child);
-        $ret .= $this->row('Block wrap name', $def->info_block_wrapper);
-
-        $ret .= $this->start('tr');
-            $ret .= $this->element('th', 'Global attributes');
-            $ret .= $this->element('td', $this->listifyAttr($def->info_global_attr),0,0);
-        $ret .= $this->end('tr');
-
-        $ret .= $this->start('tr');
-            $ret .= $this->element('th', 'Tag transforms');
-            $list = array();
-            foreach ($def->info_tag_transform as $old => $new) {
-                $new = $this->getClass($new, 'TagTransform_');
-                $list[] = "<$old> with $new";
-            }
-            $ret .= $this->element('td', $this->listify($list));
-        $ret .= $this->end('tr');
-
-        $ret .= $this->start('tr');
-            $ret .= $this->element('th', 'Pre-AttrTransform');
-            $ret .= $this->element('td', $this->listifyObjectList($def->info_attr_transform_pre));
-        $ret .= $this->end('tr');
-
-        $ret .= $this->start('tr');
-            $ret .= $this->element('th', 'Post-AttrTransform');
-            $ret .= $this->element('td', $this->listifyObjectList($def->info_attr_transform_post));
-        $ret .= $this->end('tr');
-
-        $ret .= $this->end('table');
-        return $ret;
-    }
-
-    /**
-     * Renders the Content Sets table
-     */
-    protected function renderContentSets() {
-        $ret = '';
-        $ret .= $this->start('table');
-        $ret .= $this->element('caption', 'Content Sets');
-        foreach ($this->def->info_content_sets as $name => $lookup) {
-            $ret .= $this->heavyHeader($name);
-            $ret .= $this->start('tr');
-            $ret .= $this->element('td', $this->listifyTagLookup($lookup));
-            $ret .= $this->end('tr');
-        }
-        $ret .= $this->end('table');
-        return $ret;
-    }
-
-    /**
-     * Renders the Elements ($info) table
-     */
-    protected function renderInfo() {
-        $ret = '';
-        $ret .= $this->start('table');
-        $ret .= $this->element('caption', 'Elements ($info)');
-        ksort($this->def->info);
-        $ret .= $this->heavyHeader('Allowed tags', 2);
-        $ret .= $this->start('tr');
-        $ret .= $this->element('td', $this->listifyTagLookup($this->def->info), array('colspan' => 2));
-        $ret .= $this->end('tr');
-        foreach ($this->def->info as $name => $def) {
-            $ret .= $this->start('tr');
-                $ret .= $this->element('th', "<$name>", array('class'=>'heavy', 'colspan' => 2));
-            $ret .= $this->end('tr');
-            $ret .= $this->start('tr');
-                $ret .= $this->element('th', 'Inline content');
-                $ret .= $this->element('td', $def->descendants_are_inline ? 'Yes' : 'No');
-            $ret .= $this->end('tr');
-            if (!empty($def->excludes)) {
-                $ret .= $this->start('tr');
-                    $ret .= $this->element('th', 'Excludes');
-                    $ret .= $this->element('td', $this->listifyTagLookup($def->excludes));
-                $ret .= $this->end('tr');
-            }
-            if (!empty($def->attr_transform_pre)) {
-                $ret .= $this->start('tr');
-                    $ret .= $this->element('th', 'Pre-AttrTransform');
-                    $ret .= $this->element('td', $this->listifyObjectList($def->attr_transform_pre));
-                $ret .= $this->end('tr');
-            }
-            if (!empty($def->attr_transform_post)) {
-                $ret .= $this->start('tr');
-                    $ret .= $this->element('th', 'Post-AttrTransform');
-                    $ret .= $this->element('td', $this->listifyObjectList($def->attr_transform_post));
-                $ret .= $this->end('tr');
-            }
-            if (!empty($def->auto_close)) {
-                $ret .= $this->start('tr');
-                    $ret .= $this->element('th', 'Auto closed by');
-                    $ret .= $this->element('td', $this->listifyTagLookup($def->auto_close));
-                $ret .= $this->end('tr');
-            }
-            $ret .= $this->start('tr');
-                $ret .= $this->element('th', 'Allowed attributes');
-                $ret .= $this->element('td',$this->listifyAttr($def->attr), array(), 0);
-            $ret .= $this->end('tr');
-
-            if (!empty($def->required_attr)) {
-                $ret .= $this->row('Required attributes', $this->listify($def->required_attr));
-            }
-
-            $ret .= $this->renderChildren($def->child);
-        }
-        $ret .= $this->end('table');
-        return $ret;
-    }
-
-    /**
-     * Renders a row describing the allowed children of an element
-     * @param $def HTMLPurifier_ChildDef of pertinent element
-     */
-    protected function renderChildren($def) {
-        $context = new HTMLPurifier_Context();
-        $ret = '';
-        $ret .= $this->start('tr');
-            $elements = array();
-            $attr = array();
-            if (isset($def->elements)) {
-                if ($def->type == 'strictblockquote') {
-                    $def->validateChildren(array(), $this->config, $context);
-                }
-                $elements = $def->elements;
-            }
-            if ($def->type == 'chameleon') {
-                $attr['rowspan'] = 2;
-            } elseif ($def->type == 'empty') {
-                $elements = array();
-            } elseif ($def->type == 'table') {
-                $elements = array_flip(array('col', 'caption', 'colgroup', 'thead',
-                    'tfoot', 'tbody', 'tr'));
-            }
-            $ret .= $this->element('th', 'Allowed children', $attr);
-
-            if ($def->type == 'chameleon') {
-
-                $ret .= $this->element('td',
-                    '<em>Block</em>: ' .
-                    $this->escape($this->listifyTagLookup($def->block->elements)),0,0);
-                $ret .= $this->end('tr');
-                $ret .= $this->start('tr');
-                $ret .= $this->element('td',
-                    '<em>Inline</em>: ' .
-                    $this->escape($this->listifyTagLookup($def->inline->elements)),0,0);
-
-            } elseif ($def->type == 'custom') {
-
-                $ret .= $this->element('td', '<em>'.ucfirst($def->type).'</em>: ' .
-                    $def->dtd_regex);
-
-            } else {
-                $ret .= $this->element('td',
-                    '<em>'.ucfirst($def->type).'</em>: ' .
-                    $this->escape($this->listifyTagLookup($elements)),0,0);
-            }
-        $ret .= $this->end('tr');
-        return $ret;
-    }
-
-    /**
-     * Listifies a tag lookup table.
-     * @param $array Tag lookup array in form of array('tagname' => true)
-     */
-    protected function listifyTagLookup($array) {
-        ksort($array);
-        $list = array();
-        foreach ($array as $name => $discard) {
-            if ($name !== '#PCDATA' && !isset($this->def->info[$name])) continue;
-            $list[] = $name;
-        }
-        return $this->listify($list);
-    }
-
-    /**
-     * Listifies a list of objects by retrieving class names and internal state
-     * @param $array List of objects
-     * @todo Also add information about internal state
-     */
-    protected function listifyObjectList($array) {
-        ksort($array);
-        $list = array();
-        foreach ($array as $discard => $obj) {
-            $list[] = $this->getClass($obj, 'AttrTransform_');
-        }
-        return $this->listify($list);
-    }
-
-    /**
-     * Listifies a hash of attributes to AttrDef classes
-     * @param $array Array hash in form of array('attrname' => HTMLPurifier_AttrDef)
-     */
-    protected function listifyAttr($array) {
-        ksort($array);
-        $list = array();
-        foreach ($array as $name => $obj) {
-            if ($obj === false) continue;
-            $list[] = "$name&nbsp;=&nbsp;<i>" . $this->getClass($obj, 'AttrDef_') . '</i>';
-        }
-        return $this->listify($list);
-    }
-
-    /**
-     * Creates a heavy header row
-     */
-    protected function heavyHeader($text, $num = 1) {
-        $ret = '';
-        $ret .= $this->start('tr');
-        $ret .= $this->element('th', $text, array('colspan' => $num, 'class' => 'heavy'));
-        $ret .= $this->end('tr');
-        return $ret;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/PropertyList.php b/extlib/HTMLPurifier/HTMLPurifier/PropertyList.php
deleted file mode 100644
index 2b99fb7bc3..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/PropertyList.php
+++ /dev/null
@@ -1,86 +0,0 @@
-<?php
-
-/**
- * Generic property list implementation
- */
-class HTMLPurifier_PropertyList
-{
-    /**
-     * Internal data-structure for properties
-     */
-    protected $data = array();
-
-    /**
-     * Parent plist
-     */
-    protected $parent;
-
-    protected $cache;
-
-    public function __construct($parent = null) {
-        $this->parent = $parent;
-    }
-
-    /**
-     * Recursively retrieves the value for a key
-     */
-    public function get($name) {
-        if ($this->has($name)) return $this->data[$name];
-        // possible performance bottleneck, convert to iterative if necessary
-        if ($this->parent) return $this->parent->get($name);
-        throw new HTMLPurifier_Exception("Key '$name' not found");
-    }
-
-    /**
-     * Sets the value of a key, for this plist
-     */
-    public function set($name, $value) {
-        $this->data[$name] = $value;
-    }
-
-    /**
-     * Returns true if a given key exists
-     */
-    public function has($name) {
-        return array_key_exists($name, $this->data);
-    }
-
-    /**
-     * Resets a value to the value of it's parent, usually the default. If
-     * no value is specified, the entire plist is reset.
-     */
-    public function reset($name = null) {
-        if ($name == null) $this->data = array();
-        else unset($this->data[$name]);
-    }
-
-    /**
-     * Squashes this property list and all of its property lists into a single
-     * array, and returns the array. This value is cached by default.
-     * @param $force If true, ignores the cache and regenerates the array.
-     */
-    public function squash($force = false) {
-        if ($this->cache !== null && !$force) return $this->cache;
-        if ($this->parent) {
-            return $this->cache = array_merge($this->parent->squash($force), $this->data);
-        } else {
-            return $this->cache = $this->data;
-        }
-    }
-
-    /**
-     * Returns the parent plist.
-     */
-    public function getParent() {
-        return $this->parent;
-    }
-
-    /**
-     * Sets the parent plist.
-     */
-    public function setParent($plist) {
-        $this->parent = $plist;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/PropertyListIterator.php b/extlib/HTMLPurifier/HTMLPurifier/PropertyListIterator.php
deleted file mode 100644
index 8f250443e4..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/PropertyListIterator.php
+++ /dev/null
@@ -1,32 +0,0 @@
-<?php
-
-/**
- * Property list iterator. Do not instantiate this class directly.
- */
-class HTMLPurifier_PropertyListIterator extends FilterIterator
-{
-
-    protected $l;
-    protected $filter;
-
-    /**
-     * @param $data Array of data to iterate over
-     * @param $filter Optional prefix to only allow values of
-     */
-    public function __construct(Iterator $iterator, $filter = null) {
-        parent::__construct($iterator);
-        $this->l = strlen($filter);
-        $this->filter = $filter;
-    }
-
-    public function accept() {
-        $key = $this->getInnerIterator()->key();
-        if( strncmp($key, $this->filter, $this->l) !== 0 ) {
-            return false;
-        }
-        return true;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Strategy.php b/extlib/HTMLPurifier/HTMLPurifier/Strategy.php
deleted file mode 100644
index 2462865210..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Strategy.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-
-/**
- * Supertype for classes that define a strategy for modifying/purifying tokens.
- *
- * While HTMLPurifier's core purpose is fixing HTML into something proper,
- * strategies provide plug points for extra configuration or even extra
- * features, such as custom tags, custom parsing of text, etc.
- */
-
-
-abstract class HTMLPurifier_Strategy
-{
-
-    /**
-     * Executes the strategy on the tokens.
-     *
-     * @param $tokens Array of HTMLPurifier_Token objects to be operated on.
-     * @param $config Configuration options
-     * @returns Processed array of token objects.
-     */
-    abstract public function execute($tokens, $config, $context);
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Strategy/Composite.php b/extlib/HTMLPurifier/HTMLPurifier/Strategy/Composite.php
deleted file mode 100644
index 816490b799..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Strategy/Composite.php
+++ /dev/null
@@ -1,25 +0,0 @@
-<?php
-
-/**
- * Composite strategy that runs multiple strategies on tokens.
- */
-abstract class HTMLPurifier_Strategy_Composite extends HTMLPurifier_Strategy
-{
-
-    /**
-     * List of strategies to run tokens through.
-     */
-    protected $strategies = array();
-
-    abstract public function __construct();
-
-    public function execute($tokens, $config, $context) {
-        foreach ($this->strategies as $strategy) {
-            $tokens = $strategy->execute($tokens, $config, $context);
-        }
-        return $tokens;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Strategy/Core.php b/extlib/HTMLPurifier/HTMLPurifier/Strategy/Core.php
deleted file mode 100644
index d90e158606..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Strategy/Core.php
+++ /dev/null
@@ -1,18 +0,0 @@
-<?php
-
-/**
- * Core strategy composed of the big four strategies.
- */
-class HTMLPurifier_Strategy_Core extends HTMLPurifier_Strategy_Composite
-{
-
-    public function __construct() {
-        $this->strategies[] = new HTMLPurifier_Strategy_RemoveForeignElements();
-        $this->strategies[] = new HTMLPurifier_Strategy_MakeWellFormed();
-        $this->strategies[] = new HTMLPurifier_Strategy_FixNesting();
-        $this->strategies[] = new HTMLPurifier_Strategy_ValidateAttributes();
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Strategy/FixNesting.php b/extlib/HTMLPurifier/HTMLPurifier/Strategy/FixNesting.php
deleted file mode 100644
index f81802391b..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Strategy/FixNesting.php
+++ /dev/null
@@ -1,328 +0,0 @@
-<?php
-
-/**
- * Takes a well formed list of tokens and fixes their nesting.
- *
- * HTML elements dictate which elements are allowed to be their children,
- * for example, you can't have a p tag in a span tag.  Other elements have
- * much more rigorous definitions: tables, for instance, require a specific
- * order for their elements.  There are also constraints not expressible by
- * document type definitions, such as the chameleon nature of ins/del
- * tags and global child exclusions.
- *
- * The first major objective of this strategy is to iterate through all the
- * nodes (not tokens) of the list of tokens and determine whether or not
- * their children conform to the element's definition.  If they do not, the
- * child definition may optionally supply an amended list of elements that
- * is valid or require that the entire node be deleted (and the previous
- * node rescanned).
- *
- * The second objective is to ensure that explicitly excluded elements of
- * an element do not appear in its children.  Code that accomplishes this
- * task is pervasive through the strategy, though the two are distinct tasks
- * and could, theoretically, be seperated (although it's not recommended).
- *
- * @note Whether or not unrecognized children are silently dropped or
- *       translated into text depends on the child definitions.
- *
- * @todo Enable nodes to be bubbled out of the structure.
- */
-
-class HTMLPurifier_Strategy_FixNesting extends HTMLPurifier_Strategy
-{
-
-    public function execute($tokens, $config, $context) {
-        //####################################################################//
-        // Pre-processing
-
-        // get a copy of the HTML definition
-        $definition = $config->getHTMLDefinition();
-
-        // insert implicit "parent" node, will be removed at end.
-        // DEFINITION CALL
-        $parent_name = $definition->info_parent;
-        array_unshift($tokens, new HTMLPurifier_Token_Start($parent_name));
-        $tokens[] = new HTMLPurifier_Token_End($parent_name);
-
-        // setup the context variable 'IsInline', for chameleon processing
-        // is 'false' when we are not inline, 'true' when it must always
-        // be inline, and an integer when it is inline for a certain
-        // branch of the document tree
-        $is_inline = $definition->info_parent_def->descendants_are_inline;
-        $context->register('IsInline', $is_inline);
-
-        // setup error collector
-        $e =& $context->get('ErrorCollector', true);
-
-        //####################################################################//
-        // Loop initialization
-
-        // stack that contains the indexes of all parents,
-        // $stack[count($stack)-1] being the current parent
-        $stack = array();
-
-        // stack that contains all elements that are excluded
-        // it is organized by parent elements, similar to $stack,
-        // but it is only populated when an element with exclusions is
-        // processed, i.e. there won't be empty exclusions.
-        $exclude_stack = array();
-
-        // variable that contains the start token while we are processing
-        // nodes. This enables error reporting to do its job
-        $start_token = false;
-        $context->register('CurrentToken', $start_token);
-
-        //####################################################################//
-        // Loop
-
-        // iterate through all start nodes. Determining the start node
-        // is complicated so it has been omitted from the loop construct
-        for ($i = 0, $size = count($tokens) ; $i < $size; ) {
-
-            //################################################################//
-            // Gather information on children
-
-            // child token accumulator
-            $child_tokens = array();
-
-            // scroll to the end of this node, report number, and collect
-            // all children
-            for ($j = $i, $depth = 0; ; $j++) {
-                if ($tokens[$j] instanceof HTMLPurifier_Token_Start) {
-                    $depth++;
-                    // skip token assignment on first iteration, this is the
-                    // token we currently are on
-                    if ($depth == 1) continue;
-                } elseif ($tokens[$j] instanceof HTMLPurifier_Token_End) {
-                    $depth--;
-                    // skip token assignment on last iteration, this is the
-                    // end token of the token we're currently on
-                    if ($depth == 0) break;
-                }
-                $child_tokens[] = $tokens[$j];
-            }
-
-            // $i is index of start token
-            // $j is index of end token
-
-            $start_token = $tokens[$i]; // to make token available via CurrentToken
-
-            //################################################################//
-            // Gather information on parent
-
-            // calculate parent information
-            if ($count = count($stack)) {
-                $parent_index = $stack[$count-1];
-                $parent_name  = $tokens[$parent_index]->name;
-                if ($parent_index == 0) {
-                    $parent_def   = $definition->info_parent_def;
-                } else {
-                    $parent_def   = $definition->info[$parent_name];
-                }
-            } else {
-                // processing as if the parent were the "root" node
-                // unknown info, it won't be used anyway, in the future,
-                // we may want to enforce one element only (this is
-                // necessary for HTML Purifier to clean entire documents
-                $parent_index = $parent_name = $parent_def = null;
-            }
-
-            // calculate context
-            if ($is_inline === false) {
-                // check if conditions make it inline
-                if (!empty($parent_def) && $parent_def->descendants_are_inline) {
-                    $is_inline = $count - 1;
-                }
-            } else {
-                // check if we're out of inline
-                if ($count === $is_inline) {
-                    $is_inline = false;
-                }
-            }
-
-            //################################################################//
-            // Determine whether element is explicitly excluded SGML-style
-
-            // determine whether or not element is excluded by checking all
-            // parent exclusions. The array should not be very large, two
-            // elements at most.
-            $excluded = false;
-            if (!empty($exclude_stack)) {
-                foreach ($exclude_stack as $lookup) {
-                    if (isset($lookup[$tokens[$i]->name])) {
-                        $excluded = true;
-                        // no need to continue processing
-                        break;
-                    }
-                }
-            }
-
-            //################################################################//
-            // Perform child validation
-
-            if ($excluded) {
-                // there is an exclusion, remove the entire node
-                $result = false;
-                $excludes = array(); // not used, but good to initialize anyway
-            } else {
-                // DEFINITION CALL
-                if ($i === 0) {
-                    // special processing for the first node
-                    $def = $definition->info_parent_def;
-                } else {
-                    $def = $definition->info[$tokens[$i]->name];
-
-                }
-
-                if (!empty($def->child)) {
-                    // have DTD child def validate children
-                    $result = $def->child->validateChildren(
-                        $child_tokens, $config, $context);
-                } else {
-                    // weird, no child definition, get rid of everything
-                    $result = false;
-                }
-
-                // determine whether or not this element has any exclusions
-                $excludes = $def->excludes;
-            }
-
-            // $result is now a bool or array
-
-            //################################################################//
-            // Process result by interpreting $result
-
-            if ($result === true || $child_tokens === $result) {
-                // leave the node as is
-
-                // register start token as a parental node start
-                $stack[] = $i;
-
-                // register exclusions if there are any
-                if (!empty($excludes)) $exclude_stack[] = $excludes;
-
-                // move cursor to next possible start node
-                $i++;
-
-            } elseif($result === false) {
-                // remove entire node
-
-                if ($e) {
-                    if ($excluded) {
-                        $e->send(E_ERROR, 'Strategy_FixNesting: Node excluded');
-                    } else {
-                        $e->send(E_ERROR, 'Strategy_FixNesting: Node removed');
-                    }
-                }
-
-                // calculate length of inner tokens and current tokens
-                $length = $j - $i + 1;
-
-                // perform removal
-                array_splice($tokens, $i, $length);
-
-                // update size
-                $size -= $length;
-
-                // there is no start token to register,
-                // current node is now the next possible start node
-                // unless it turns out that we need to do a double-check
-
-                // this is a rought heuristic that covers 100% of HTML's
-                // cases and 99% of all other cases. A child definition
-                // that would be tricked by this would be something like:
-                // ( | a b c) where it's all or nothing. Fortunately,
-                // our current implementation claims that that case would
-                // not allow empty, even if it did
-                if (!$parent_def->child->allow_empty) {
-                    // we need to do a double-check
-                    $i = $parent_index;
-                    array_pop($stack);
-                }
-
-                // PROJECTED OPTIMIZATION: Process all children elements before
-                // reprocessing parent node.
-
-            } else {
-                // replace node with $result
-
-                // calculate length of inner tokens
-                $length = $j - $i - 1;
-
-                if ($e) {
-                    if (empty($result) && $length) {
-                        $e->send(E_ERROR, 'Strategy_FixNesting: Node contents removed');
-                    } else {
-                        $e->send(E_WARNING, 'Strategy_FixNesting: Node reorganized');
-                    }
-                }
-
-                // perform replacement
-                array_splice($tokens, $i + 1, $length, $result);
-
-                // update size
-                $size -= $length;
-                $size += count($result);
-
-                // register start token as a parental node start
-                $stack[] = $i;
-
-                // register exclusions if there are any
-                if (!empty($excludes)) $exclude_stack[] = $excludes;
-
-                // move cursor to next possible start node
-                $i++;
-
-            }
-
-            //################################################################//
-            // Scroll to next start node
-
-            // We assume, at this point, that $i is the index of the token
-            // that is the first possible new start point for a node.
-
-            // Test if the token indeed is a start tag, if not, move forward
-            // and test again.
-            $size = count($tokens);
-            while ($i < $size and !$tokens[$i] instanceof HTMLPurifier_Token_Start) {
-                if ($tokens[$i] instanceof HTMLPurifier_Token_End) {
-                    // pop a token index off the stack if we ended a node
-                    array_pop($stack);
-                    // pop an exclusion lookup off exclusion stack if
-                    // we ended node and that node had exclusions
-                    if ($i == 0 || $i == $size - 1) {
-                        // use specialized var if it's the super-parent
-                        $s_excludes = $definition->info_parent_def->excludes;
-                    } else {
-                        $s_excludes = $definition->info[$tokens[$i]->name]->excludes;
-                    }
-                    if ($s_excludes) {
-                        array_pop($exclude_stack);
-                    }
-                }
-                $i++;
-            }
-
-        }
-
-        //####################################################################//
-        // Post-processing
-
-        // remove implicit parent tokens at the beginning and end
-        array_shift($tokens);
-        array_pop($tokens);
-
-        // remove context variables
-        $context->destroy('IsInline');
-        $context->destroy('CurrentToken');
-
-        //####################################################################//
-        // Return
-
-        return $tokens;
-
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Strategy/MakeWellFormed.php b/extlib/HTMLPurifier/HTMLPurifier/Strategy/MakeWellFormed.php
deleted file mode 100644
index feb0c32b45..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Strategy/MakeWellFormed.php
+++ /dev/null
@@ -1,457 +0,0 @@
-<?php
-
-/**
- * Takes tokens makes them well-formed (balance end tags, etc.)
- */
-class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
-{
-
-    /**
-     * Array stream of tokens being processed.
-     */
-    protected $tokens;
-
-    /**
-     * Current index in $tokens.
-     */
-    protected $t;
-
-    /**
-     * Current nesting of elements.
-     */
-    protected $stack;
-
-    /**
-     * Injectors active in this stream processing.
-     */
-    protected $injectors;
-
-    /**
-     * Current instance of HTMLPurifier_Config.
-     */
-    protected $config;
-
-    /**
-     * Current instance of HTMLPurifier_Context.
-     */
-    protected $context;
-
-    public function execute($tokens, $config, $context) {
-
-        $definition = $config->getHTMLDefinition();
-
-        // local variables
-        $generator = new HTMLPurifier_Generator($config, $context);
-        $escape_invalid_tags = $config->get('Core.EscapeInvalidTags');
-        $e = $context->get('ErrorCollector', true);
-        $t = false; // token index
-        $i = false; // injector index
-        $token      = false; // the current token
-        $reprocess  = false; // whether or not to reprocess the same token
-        $stack = array();
-
-        // member variables
-        $this->stack   =& $stack;
-        $this->t       =& $t;
-        $this->tokens  =& $tokens;
-        $this->config  = $config;
-        $this->context = $context;
-
-        // context variables
-        $context->register('CurrentNesting', $stack);
-        $context->register('InputIndex',     $t);
-        $context->register('InputTokens',    $tokens);
-        $context->register('CurrentToken',   $token);
-
-        // -- begin INJECTOR --
-
-        $this->injectors = array();
-
-        $injectors = $config->getBatch('AutoFormat');
-        $def_injectors = $definition->info_injector;
-        $custom_injectors = $injectors['Custom'];
-        unset($injectors['Custom']); // special case
-        foreach ($injectors as $injector => $b) {
-            // XXX: Fix with a legitimate lookup table of enabled filters
-            if (strpos($injector, '.') !== false) continue;
-            $injector = "HTMLPurifier_Injector_$injector";
-            if (!$b) continue;
-            $this->injectors[] = new $injector;
-        }
-        foreach ($def_injectors as $injector) {
-            // assumed to be objects
-            $this->injectors[] = $injector;
-        }
-        foreach ($custom_injectors as $injector) {
-            if (is_string($injector)) {
-                $injector = "HTMLPurifier_Injector_$injector";
-                $injector = new $injector;
-            }
-            $this->injectors[] = $injector;
-        }
-
-        // give the injectors references to the definition and context
-        // variables for performance reasons
-        foreach ($this->injectors as $ix => $injector) {
-            $error = $injector->prepare($config, $context);
-            if (!$error) continue;
-            array_splice($this->injectors, $ix, 1); // rm the injector
-            trigger_error("Cannot enable {$injector->name} injector because $error is not allowed", E_USER_WARNING);
-        }
-
-        // -- end INJECTOR --
-
-        // a note on punting:
-        //      In order to reduce code duplication, whenever some code needs
-        //      to make HTML changes in order to make things "correct", the
-        //      new HTML gets sent through the purifier, regardless of its
-        //      status. This means that if we add a start token, because it
-        //      was totally necessary, we don't have to update nesting; we just
-        //      punt ($reprocess = true; continue;) and it does that for us.
-
-        // isset is in loop because $tokens size changes during loop exec
-        for (
-            $t = 0;
-            $t == 0 || isset($tokens[$t - 1]);
-            // only increment if we don't need to reprocess
-            $reprocess ? $reprocess = false : $t++
-        ) {
-
-            // check for a rewind
-            if (is_int($i) && $i >= 0) {
-                // possibility: disable rewinding if the current token has a
-                // rewind set on it already. This would offer protection from
-                // infinite loop, but might hinder some advanced rewinding.
-                $rewind_to = $this->injectors[$i]->getRewind();
-                if (is_int($rewind_to) && $rewind_to < $t) {
-                    if ($rewind_to < 0) $rewind_to = 0;
-                    while ($t > $rewind_to) {
-                        $t--;
-                        $prev = $tokens[$t];
-                        // indicate that other injectors should not process this token,
-                        // but we need to reprocess it
-                        unset($prev->skip[$i]);
-                        $prev->rewind = $i;
-                        if ($prev instanceof HTMLPurifier_Token_Start) array_pop($this->stack);
-                        elseif ($prev instanceof HTMLPurifier_Token_End) $this->stack[] = $prev->start;
-                    }
-                }
-                $i = false;
-            }
-
-            // handle case of document end
-            if (!isset($tokens[$t])) {
-                // kill processing if stack is empty
-                if (empty($this->stack)) break;
-
-                // peek
-                $top_nesting = array_pop($this->stack);
-                $this->stack[] = $top_nesting;
-
-                // send error
-                if ($e && !isset($top_nesting->armor['MakeWellFormed_TagClosedError'])) {
-                    $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag closed by document end', $top_nesting);
-                }
-
-                // append, don't splice, since this is the end
-                $tokens[] = new HTMLPurifier_Token_End($top_nesting->name);
-
-                // punt!
-                $reprocess = true;
-                continue;
-            }
-
-            $token = $tokens[$t];
-
-            //echo '<br>'; printTokens($tokens, $t); printTokens($this->stack);
-
-            // quick-check: if it's not a tag, no need to process
-            if (empty($token->is_tag)) {
-                if ($token instanceof HTMLPurifier_Token_Text) {
-                    foreach ($this->injectors as $i => $injector) {
-                        if (isset($token->skip[$i])) continue;
-                        if ($token->rewind !== null && $token->rewind !== $i) continue;
-                        $injector->handleText($token);
-                        $this->processToken($token, $i);
-                        $reprocess = true;
-                        break;
-                    }
-                }
-                // another possibility is a comment
-                continue;
-            }
-
-            if (isset($definition->info[$token->name])) {
-                $type = $definition->info[$token->name]->child->type;
-            } else {
-                $type = false; // Type is unknown, treat accordingly
-            }
-
-            // quick tag checks: anything that's *not* an end tag
-            $ok = false;
-            if ($type === 'empty' && $token instanceof HTMLPurifier_Token_Start) {
-                // claims to be a start tag but is empty
-                $token = new HTMLPurifier_Token_Empty($token->name, $token->attr);
-                $ok = true;
-            } elseif ($type && $type !== 'empty' && $token instanceof HTMLPurifier_Token_Empty) {
-                // claims to be empty but really is a start tag
-                $this->swap(new HTMLPurifier_Token_End($token->name));
-                $this->insertBefore(new HTMLPurifier_Token_Start($token->name, $token->attr));
-                // punt (since we had to modify the input stream in a non-trivial way)
-                $reprocess = true;
-                continue;
-            } elseif ($token instanceof HTMLPurifier_Token_Empty) {
-                // real empty token
-                $ok = true;
-            } elseif ($token instanceof HTMLPurifier_Token_Start) {
-                // start tag
-
-                // ...unless they also have to close their parent
-                if (!empty($this->stack)) {
-
-                    $parent = array_pop($this->stack);
-                    $this->stack[] = $parent;
-
-                    if (isset($definition->info[$parent->name])) {
-                        $elements = $definition->info[$parent->name]->child->getAllowedElements($config);
-                        $autoclose = !isset($elements[$token->name]);
-                    } else {
-                        $autoclose = false;
-                    }
-
-                    $carryover = false;
-                    if ($autoclose && $definition->info[$parent->name]->formatting) {
-                        $carryover = true;
-                    }
-
-                    if ($autoclose) {
-                        // errors need to be updated
-                        $new_token = new HTMLPurifier_Token_End($parent->name);
-                        $new_token->start = $parent;
-                        if ($carryover) {
-                            $element = clone $parent;
-                            $element->armor['MakeWellFormed_TagClosedError'] = true;
-                            $element->carryover = true;
-                            $this->processToken(array($new_token, $token, $element));
-                        } else {
-                            $this->insertBefore($new_token);
-                        }
-                        if ($e && !isset($parent->armor['MakeWellFormed_TagClosedError'])) {
-                            if (!$carryover) {
-                                $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag auto closed', $parent);
-                            } else {
-                                $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag carryover', $parent);
-                            }
-                        }
-                        $reprocess = true;
-                        continue;
-                    }
-
-                }
-                $ok = true;
-            }
-
-            if ($ok) {
-                foreach ($this->injectors as $i => $injector) {
-                    if (isset($token->skip[$i])) continue;
-                    if ($token->rewind !== null && $token->rewind !== $i) continue;
-                    $injector->handleElement($token);
-                    $this->processToken($token, $i);
-                    $reprocess = true;
-                    break;
-                }
-                if (!$reprocess) {
-                    // ah, nothing interesting happened; do normal processing
-                    $this->swap($token);
-                    if ($token instanceof HTMLPurifier_Token_Start) {
-                        $this->stack[] = $token;
-                    } elseif ($token instanceof HTMLPurifier_Token_End) {
-                        throw new HTMLPurifier_Exception('Improper handling of end tag in start code; possible error in MakeWellFormed');
-                    }
-                }
-                continue;
-            }
-
-            // sanity check: we should be dealing with a closing tag
-            if (!$token instanceof HTMLPurifier_Token_End) {
-                throw new HTMLPurifier_Exception('Unaccounted for tag token in input stream, bug in HTML Purifier');
-            }
-
-            // make sure that we have something open
-            if (empty($this->stack)) {
-                if ($escape_invalid_tags) {
-                    if ($e) $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag to text');
-                    $this->swap(new HTMLPurifier_Token_Text(
-                        $generator->generateFromToken($token)
-                    ));
-                } else {
-                    $this->remove();
-                    if ($e) $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag removed');
-                }
-                $reprocess = true;
-                continue;
-            }
-
-            // first, check for the simplest case: everything closes neatly.
-            // Eventually, everything passes through here; if there are problems
-            // we modify the input stream accordingly and then punt, so that
-            // the tokens get processed again.
-            $current_parent = array_pop($this->stack);
-            if ($current_parent->name == $token->name) {
-                $token->start = $current_parent;
-                foreach ($this->injectors as $i => $injector) {
-                    if (isset($token->skip[$i])) continue;
-                    if ($token->rewind !== null && $token->rewind !== $i) continue;
-                    $injector->handleEnd($token);
-                    $this->processToken($token, $i);
-                    $this->stack[] = $current_parent;
-                    $reprocess = true;
-                    break;
-                }
-                continue;
-            }
-
-            // okay, so we're trying to close the wrong tag
-
-            // undo the pop previous pop
-            $this->stack[] = $current_parent;
-
-            // scroll back the entire nest, trying to find our tag.
-            // (feature could be to specify how far you'd like to go)
-            $size = count($this->stack);
-            // -2 because -1 is the last element, but we already checked that
-            $skipped_tags = false;
-            for ($j = $size - 2; $j >= 0; $j--) {
-                if ($this->stack[$j]->name == $token->name) {
-                    $skipped_tags = array_slice($this->stack, $j);
-                    break;
-                }
-            }
-
-            // we didn't find the tag, so remove
-            if ($skipped_tags === false) {
-                if ($escape_invalid_tags) {
-                    $this->swap(new HTMLPurifier_Token_Text(
-                        $generator->generateFromToken($token)
-                    ));
-                    if ($e) $e->send(E_WARNING, 'Strategy_MakeWellFormed: Stray end tag to text');
-                } else {
-                    $this->remove();
-                    if ($e) $e->send(E_WARNING, 'Strategy_MakeWellFormed: Stray end tag removed');
-                }
-                $reprocess = true;
-                continue;
-            }
-
-            // do errors, in REVERSE $j order: a,b,c with </a></b></c>
-            $c = count($skipped_tags);
-            if ($e) {
-                for ($j = $c - 1; $j > 0; $j--) {
-                    // notice we exclude $j == 0, i.e. the current ending tag, from
-                    // the errors...
-                    if (!isset($skipped_tags[$j]->armor['MakeWellFormed_TagClosedError'])) {
-                        $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag closed by element end', $skipped_tags[$j]);
-                    }
-                }
-            }
-
-            // insert tags, in FORWARD $j order: c,b,a with </a></b></c>
-            $replace = array($token);
-            for ($j = 1; $j < $c; $j++) {
-                // ...as well as from the insertions
-                $new_token = new HTMLPurifier_Token_End($skipped_tags[$j]->name);
-                $new_token->start = $skipped_tags[$j];
-                array_unshift($replace, $new_token);
-                if (isset($definition->info[$new_token->name]) && $definition->info[$new_token->name]->formatting) {
-                    $element = clone $skipped_tags[$j];
-                    $element->carryover = true;
-                    $element->armor['MakeWellFormed_TagClosedError'] = true;
-                    $replace[] = $element;
-                }
-            }
-            $this->processToken($replace);
-            $reprocess = true;
-            continue;
-        }
-
-        $context->destroy('CurrentNesting');
-        $context->destroy('InputTokens');
-        $context->destroy('InputIndex');
-        $context->destroy('CurrentToken');
-
-        unset($this->injectors, $this->stack, $this->tokens, $this->t);
-        return $tokens;
-    }
-
-    /**
-     * Processes arbitrary token values for complicated substitution patterns.
-     * In general:
-     *
-     * If $token is an array, it is a list of tokens to substitute for the
-     * current token. These tokens then get individually processed. If there
-     * is a leading integer in the list, that integer determines how many
-     * tokens from the stream should be removed.
-     *
-     * If $token is a regular token, it is swapped with the current token.
-     *
-     * If $token is false, the current token is deleted.
-     *
-     * If $token is an integer, that number of tokens (with the first token
-     * being the current one) will be deleted.
-     *
-     * @param $token Token substitution value
-     * @param $injector Injector that performed the substitution; default is if
-     *        this is not an injector related operation.
-     */
-    protected function processToken($token, $injector = -1) {
-
-        // normalize forms of token
-        if (is_object($token)) $token = array(1, $token);
-        if (is_int($token))    $token = array($token);
-        if ($token === false)  $token = array(1);
-        if (!is_array($token)) throw new HTMLPurifier_Exception('Invalid token type from injector');
-        if (!is_int($token[0])) array_unshift($token, 1);
-        if ($token[0] === 0) throw new HTMLPurifier_Exception('Deleting zero tokens is not valid');
-
-        // $token is now an array with the following form:
-        // array(number nodes to delete, new node 1, new node 2, ...)
-
-        $delete = array_shift($token);
-        $old = array_splice($this->tokens, $this->t, $delete, $token);
-
-        if ($injector > -1) {
-            // determine appropriate skips
-            $oldskip = isset($old[0]) ? $old[0]->skip : array();
-            foreach ($token as $object) {
-                $object->skip = $oldskip;
-                $object->skip[$injector] = true;
-            }
-        }
-
-    }
-
-    /**
-     * Inserts a token before the current token. Cursor now points to this token
-     */
-    private function insertBefore($token) {
-        array_splice($this->tokens, $this->t, 0, array($token));
-    }
-
-    /**
-     * Removes current token. Cursor now points to new token occupying previously
-     * occupied space.
-     */
-    private function remove() {
-        array_splice($this->tokens, $this->t, 1);
-    }
-
-    /**
-     * Swap current token with new token. Cursor points to new token (no change).
-     */
-    private function swap($token) {
-        $this->tokens[$this->t] = $token;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Strategy/RemoveForeignElements.php b/extlib/HTMLPurifier/HTMLPurifier/Strategy/RemoveForeignElements.php
deleted file mode 100644
index cf3a33e406..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Strategy/RemoveForeignElements.php
+++ /dev/null
@@ -1,171 +0,0 @@
-<?php
-
-/**
- * Removes all unrecognized tags from the list of tokens.
- *
- * This strategy iterates through all the tokens and removes unrecognized
- * tokens. If a token is not recognized but a TagTransform is defined for
- * that element, the element will be transformed accordingly.
- */
-
-class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
-{
-
-    public function execute($tokens, $config, $context) {
-        $definition = $config->getHTMLDefinition();
-        $generator = new HTMLPurifier_Generator($config, $context);
-        $result = array();
-
-        $escape_invalid_tags = $config->get('Core.EscapeInvalidTags');
-        $remove_invalid_img  = $config->get('Core.RemoveInvalidImg');
-
-        // currently only used to determine if comments should be kept
-        $trusted = $config->get('HTML.Trusted');
-
-        $remove_script_contents = $config->get('Core.RemoveScriptContents');
-        $hidden_elements     = $config->get('Core.HiddenElements');
-
-        // remove script contents compatibility
-        if ($remove_script_contents === true) {
-            $hidden_elements['script'] = true;
-        } elseif ($remove_script_contents === false && isset($hidden_elements['script'])) {
-            unset($hidden_elements['script']);
-        }
-
-        $attr_validator = new HTMLPurifier_AttrValidator();
-
-        // removes tokens until it reaches a closing tag with its value
-        $remove_until = false;
-
-        // converts comments into text tokens when this is equal to a tag name
-        $textify_comments = false;
-
-        $token = false;
-        $context->register('CurrentToken', $token);
-
-        $e = false;
-        if ($config->get('Core.CollectErrors')) {
-            $e =& $context->get('ErrorCollector');
-        }
-
-        foreach($tokens as $token) {
-            if ($remove_until) {
-                if (empty($token->is_tag) || $token->name !== $remove_until) {
-                    continue;
-                }
-            }
-            if (!empty( $token->is_tag )) {
-                // DEFINITION CALL
-
-                // before any processing, try to transform the element
-                if (
-                    isset($definition->info_tag_transform[$token->name])
-                ) {
-                    $original_name = $token->name;
-                    // there is a transformation for this tag
-                    // DEFINITION CALL
-                    $token = $definition->
-                                info_tag_transform[$token->name]->
-                                    transform($token, $config, $context);
-                    if ($e) $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Tag transform', $original_name);
-                }
-
-                if (isset($definition->info[$token->name])) {
-
-                    // mostly everything's good, but
-                    // we need to make sure required attributes are in order
-                    if (
-                        ($token instanceof HTMLPurifier_Token_Start || $token instanceof HTMLPurifier_Token_Empty) &&
-                        $definition->info[$token->name]->required_attr &&
-                        ($token->name != 'img' || $remove_invalid_img) // ensure config option still works
-                    ) {
-                        $attr_validator->validateToken($token, $config, $context);
-                        $ok = true;
-                        foreach ($definition->info[$token->name]->required_attr as $name) {
-                            if (!isset($token->attr[$name])) {
-                                $ok = false;
-                                break;
-                            }
-                        }
-                        if (!$ok) {
-                            if ($e) $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Missing required attribute', $name);
-                            continue;
-                        }
-                        $token->armor['ValidateAttributes'] = true;
-                    }
-
-                    if (isset($hidden_elements[$token->name]) && $token instanceof HTMLPurifier_Token_Start) {
-                        $textify_comments = $token->name;
-                    } elseif ($token->name === $textify_comments && $token instanceof HTMLPurifier_Token_End) {
-                        $textify_comments = false;
-                    }
-
-                } elseif ($escape_invalid_tags) {
-                    // invalid tag, generate HTML representation and insert in
-                    if ($e) $e->send(E_WARNING, 'Strategy_RemoveForeignElements: Foreign element to text');
-                    $token = new HTMLPurifier_Token_Text(
-                        $generator->generateFromToken($token)
-                    );
-                } else {
-                    // check if we need to destroy all of the tag's children
-                    // CAN BE GENERICIZED
-                    if (isset($hidden_elements[$token->name])) {
-                        if ($token instanceof HTMLPurifier_Token_Start) {
-                            $remove_until = $token->name;
-                        } elseif ($token instanceof HTMLPurifier_Token_Empty) {
-                            // do nothing: we're still looking
-                        } else {
-                            $remove_until = false;
-                        }
-                        if ($e) $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign meta element removed');
-                    } else {
-                        if ($e) $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign element removed');
-                    }
-                    continue;
-                }
-            } elseif ($token instanceof HTMLPurifier_Token_Comment) {
-                // textify comments in script tags when they are allowed
-                if ($textify_comments !== false) {
-                    $data = $token->data;
-                    $token = new HTMLPurifier_Token_Text($data);
-                } elseif ($trusted) {
-                    // keep, but perform comment cleaning
-                    if ($e) {
-                        // perform check whether or not there's a trailing hyphen
-                        if (substr($token->data, -1) == '-') {
-                            $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Trailing hyphen in comment removed');
-                        }
-                    }
-                    $token->data = rtrim($token->data, '-');
-                    $found_double_hyphen = false;
-                    while (strpos($token->data, '--') !== false) {
-                        if ($e && !$found_double_hyphen) {
-                            $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Hyphens in comment collapsed');
-                        }
-                        $found_double_hyphen = true; // prevent double-erroring
-                        $token->data = str_replace('--', '-', $token->data);
-                    }
-                } else {
-                    // strip comments
-                    if ($e) $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Comment removed');
-                    continue;
-                }
-            } elseif ($token instanceof HTMLPurifier_Token_Text) {
-            } else {
-                continue;
-            }
-            $result[] = $token;
-        }
-        if ($remove_until && $e) {
-            // we removed tokens until the end, throw error
-            $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Token removed to end', $remove_until);
-        }
-
-        $context->destroy('CurrentToken');
-
-        return $result;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Strategy/ValidateAttributes.php b/extlib/HTMLPurifier/HTMLPurifier/Strategy/ValidateAttributes.php
deleted file mode 100644
index c3328a9d44..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Strategy/ValidateAttributes.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-/**
- * Validate all attributes in the tokens.
- */
-
-class HTMLPurifier_Strategy_ValidateAttributes extends HTMLPurifier_Strategy
-{
-
-    public function execute($tokens, $config, $context) {
-
-        // setup validator
-        $validator = new HTMLPurifier_AttrValidator();
-
-        $token = false;
-        $context->register('CurrentToken', $token);
-
-        foreach ($tokens as $key => $token) {
-
-            // only process tokens that have attributes,
-            //   namely start and empty tags
-            if (!$token instanceof HTMLPurifier_Token_Start && !$token instanceof HTMLPurifier_Token_Empty) continue;
-
-            // skip tokens that are armored
-            if (!empty($token->armor['ValidateAttributes'])) continue;
-
-            // note that we have no facilities here for removing tokens
-            $validator->validateToken($token, $config, $context);
-
-            $tokens[$key] = $token; // for PHP 4
-        }
-        $context->destroy('CurrentToken');
-
-        return $tokens;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/StringHash.php b/extlib/HTMLPurifier/HTMLPurifier/StringHash.php
deleted file mode 100644
index 62085c5c2f..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/StringHash.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-/**
- * This is in almost every respect equivalent to an array except
- * that it keeps track of which keys were accessed.
- *
- * @warning For the sake of backwards compatibility with early versions
- *     of PHP 5, you must not use the $hash[$key] syntax; if you do
- *     our version of offsetGet is never called.
- */
-class HTMLPurifier_StringHash extends ArrayObject
-{
-    protected $accessed = array();
-
-    /**
-     * Retrieves a value, and logs the access.
-     */
-    public function offsetGet($index) {
-        $this->accessed[$index] = true;
-        return parent::offsetGet($index);
-    }
-
-    /**
-     * Returns a lookup array of all array indexes that have been accessed.
-     * @return Array in form array($index => true).
-     */
-    public function getAccessed() {
-        return $this->accessed;
-    }
-
-    /**
-     * Resets the access array.
-     */
-    public function resetAccessed() {
-        $this->accessed = array();
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/StringHashParser.php b/extlib/HTMLPurifier/HTMLPurifier/StringHashParser.php
deleted file mode 100644
index f3e70c712f..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/StringHashParser.php
+++ /dev/null
@@ -1,110 +0,0 @@
-<?php
-
-/**
- * Parses string hash files. File format is as such:
- *
- *      DefaultKeyValue
- *      KEY: Value
- *      KEY2: Value2
- *      --MULTILINE-KEY--
- *      Multiline
- *      value.
- *
- * Which would output something similar to:
- *
- *      array(
- *          'ID' => 'DefaultKeyValue',
- *          'KEY' => 'Value',
- *          'KEY2' => 'Value2',
- *          'MULTILINE-KEY' => "Multiline\nvalue.\n",
- *      )
- *
- * We use this as an easy to use file-format for configuration schema
- * files, but the class itself is usage agnostic.
- *
- * You can use ---- to forcibly terminate parsing of a single string-hash;
- * this marker is used in multi string-hashes to delimit boundaries.
- */
-class HTMLPurifier_StringHashParser
-{
-
-    public $default = 'ID';
-
-    /**
-     * Parses a file that contains a single string-hash.
-     */
-    public function parseFile($file) {
-        if (!file_exists($file)) return false;
-        $fh = fopen($file, 'r');
-        if (!$fh) return false;
-        $ret = $this->parseHandle($fh);
-        fclose($fh);
-        return $ret;
-    }
-
-    /**
-     * Parses a file that contains multiple string-hashes delimited by '----'
-     */
-    public function parseMultiFile($file) {
-        if (!file_exists($file)) return false;
-        $ret = array();
-        $fh = fopen($file, 'r');
-        if (!$fh) return false;
-        while (!feof($fh)) {
-            $ret[] = $this->parseHandle($fh);
-        }
-        fclose($fh);
-        return $ret;
-    }
-
-    /**
-     * Internal parser that acepts a file handle.
-     * @note While it's possible to simulate in-memory parsing by using
-     *       custom stream wrappers, if such a use-case arises we should
-     *       factor out the file handle into its own class.
-     * @param $fh File handle with pointer at start of valid string-hash
-     *            block.
-     */
-    protected function parseHandle($fh) {
-        $state   = false;
-        $single  = false;
-        $ret     = array();
-        do {
-            $line = fgets($fh);
-            if ($line === false) break;
-            $line = rtrim($line, "\n\r");
-            if (!$state && $line === '') continue;
-            if ($line === '----') break;
-            if (strncmp('--#', $line, 3) === 0) {
-                // Comment
-                continue;
-            } elseif (strncmp('--', $line, 2) === 0) {
-                // Multiline declaration
-                $state = trim($line, '- ');
-                if (!isset($ret[$state])) $ret[$state] = '';
-                continue;
-            } elseif (!$state) {
-                $single = true;
-                if (strpos($line, ':') !== false) {
-                    // Single-line declaration
-                    list($state, $line) = explode(':', $line, 2);
-                    $line = trim($line);
-                } else {
-                    // Use default declaration
-                    $state  = $this->default;
-                }
-            }
-            if ($single) {
-                $ret[$state] = $line;
-                $single = false;
-                $state  = false;
-            } else {
-                $ret[$state] .= "$line\n";
-            }
-        } while (!feof($fh));
-        return $ret;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/TagTransform.php b/extlib/HTMLPurifier/HTMLPurifier/TagTransform.php
deleted file mode 100644
index 210a447217..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/TagTransform.php
+++ /dev/null
@@ -1,36 +0,0 @@
-<?php
-
-/**
- * Defines a mutation of an obsolete tag into a valid tag.
- */
-abstract class HTMLPurifier_TagTransform
-{
-
-    /**
-     * Tag name to transform the tag to.
-     */
-    public $transform_to;
-
-    /**
-     * Transforms the obsolete tag into the valid tag.
-     * @param $tag Tag to be transformed.
-     * @param $config Mandatory HTMLPurifier_Config object
-     * @param $context Mandatory HTMLPurifier_Context object
-     */
-    abstract public function transform($tag, $config, $context);
-
-    /**
-     * Prepends CSS properties to the style attribute, creating the
-     * attribute if it doesn't exist.
-     * @warning Copied over from AttrTransform, be sure to keep in sync
-     * @param $attr Attribute array to process (passed by reference)
-     * @param $css CSS to prepend
-     */
-    protected function prependCSS(&$attr, $css) {
-        $attr['style'] = isset($attr['style']) ? $attr['style'] : '';
-        $attr['style'] = $css . $attr['style'];
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/TagTransform/Font.php b/extlib/HTMLPurifier/HTMLPurifier/TagTransform/Font.php
deleted file mode 100644
index ed2463786d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/TagTransform/Font.php
+++ /dev/null
@@ -1,96 +0,0 @@
-<?php
-
-/**
- * Transforms FONT tags to the proper form (SPAN with CSS styling)
- *
- * This transformation takes the three proprietary attributes of FONT and
- * transforms them into their corresponding CSS attributes.  These are color,
- * face, and size.
- *
- * @note Size is an interesting case because it doesn't map cleanly to CSS.
- *       Thanks to
- *       http://style.cleverchimp.com/font_size_intervals/altintervals.html
- *       for reasonable mappings.
- * @warning This doesn't work completely correctly; specifically, this
- *          TagTransform operates before well-formedness is enforced, so
- *          the "active formatting elements" algorithm doesn't get applied.
- */
-class HTMLPurifier_TagTransform_Font extends HTMLPurifier_TagTransform
-{
-
-    public $transform_to = 'span';
-
-    protected $_size_lookup = array(
-        '0' => 'xx-small',
-        '1' => 'xx-small',
-        '2' => 'small',
-        '3' => 'medium',
-        '4' => 'large',
-        '5' => 'x-large',
-        '6' => 'xx-large',
-        '7' => '300%',
-        '-1' => 'smaller',
-        '-2' => '60%',
-        '+1' => 'larger',
-        '+2' => '150%',
-        '+3' => '200%',
-        '+4' => '300%'
-    );
-
-    public function transform($tag, $config, $context) {
-
-        if ($tag instanceof HTMLPurifier_Token_End) {
-            $new_tag = clone $tag;
-            $new_tag->name = $this->transform_to;
-            return $new_tag;
-        }
-
-        $attr = $tag->attr;
-        $prepend_style = '';
-
-        // handle color transform
-        if (isset($attr['color'])) {
-            $prepend_style .= 'color:' . $attr['color'] . ';';
-            unset($attr['color']);
-        }
-
-        // handle face transform
-        if (isset($attr['face'])) {
-            $prepend_style .= 'font-family:' . $attr['face'] . ';';
-            unset($attr['face']);
-        }
-
-        // handle size transform
-        if (isset($attr['size'])) {
-            // normalize large numbers
-            if ($attr['size']{0} == '+' || $attr['size']{0} == '-') {
-                $size = (int) $attr['size'];
-                if ($size < -2) $attr['size'] = '-2';
-                if ($size > 4)  $attr['size'] = '+4';
-            } else {
-                $size = (int) $attr['size'];
-                if ($size > 7) $attr['size'] = '7';
-            }
-            if (isset($this->_size_lookup[$attr['size']])) {
-                $prepend_style .= 'font-size:' .
-                  $this->_size_lookup[$attr['size']] . ';';
-            }
-            unset($attr['size']);
-        }
-
-        if ($prepend_style) {
-            $attr['style'] = isset($attr['style']) ?
-                $prepend_style . $attr['style'] :
-                $prepend_style;
-        }
-
-        $new_tag = clone $tag;
-        $new_tag->name = $this->transform_to;
-        $new_tag->attr = $attr;
-
-        return $new_tag;
-
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/TagTransform/Simple.php b/extlib/HTMLPurifier/HTMLPurifier/TagTransform/Simple.php
deleted file mode 100644
index 0e36130f25..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/TagTransform/Simple.php
+++ /dev/null
@@ -1,35 +0,0 @@
-<?php
-
-/**
- * Simple transformation, just change tag name to something else,
- * and possibly add some styling. This will cover most of the deprecated
- * tag cases.
- */
-class HTMLPurifier_TagTransform_Simple extends HTMLPurifier_TagTransform
-{
-
-    protected $style;
-
-    /**
-     * @param $transform_to Tag name to transform to.
-     * @param $style CSS style to add to the tag
-     */
-    public function __construct($transform_to, $style = null) {
-        $this->transform_to = $transform_to;
-        $this->style = $style;
-    }
-
-    public function transform($tag, $config, $context) {
-        $new_tag = clone $tag;
-        $new_tag->name = $this->transform_to;
-        if (!is_null($this->style) &&
-            ($new_tag instanceof HTMLPurifier_Token_Start || $new_tag instanceof HTMLPurifier_Token_Empty)
-        ) {
-            $this->prependCSS($new_tag->attr, $this->style);
-        }
-        return $new_tag;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Token.php b/extlib/HTMLPurifier/HTMLPurifier/Token.php
deleted file mode 100644
index 7900e6cb10..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Token.php
+++ /dev/null
@@ -1,57 +0,0 @@
-<?php
-
-/**
- * Abstract base token class that all others inherit from.
- */
-class HTMLPurifier_Token {
-    public $line; /**< Line number node was on in source document. Null if unknown. */
-    public $col;  /**< Column of line node was on in source document. Null if unknown. */
-
-    /**
-     * Lookup array of processing that this token is exempt from.
-     * Currently, valid values are "ValidateAttributes" and
-     * "MakeWellFormed_TagClosedError"
-     */
-    public $armor = array();
-
-    /**
-     * Used during MakeWellFormed.
-     */
-    public $skip;
-    public $rewind;
-    public $carryover;
-
-    public function __get($n) {
-      if ($n === 'type') {
-        trigger_error('Deprecated type property called; use instanceof', E_USER_NOTICE);
-        switch (get_class($this)) {
-          case 'HTMLPurifier_Token_Start':      return 'start';
-          case 'HTMLPurifier_Token_Empty':      return 'empty';
-          case 'HTMLPurifier_Token_End':        return 'end';
-          case 'HTMLPurifier_Token_Text':       return 'text';
-          case 'HTMLPurifier_Token_Comment':    return 'comment';
-          default: return null;
-        }
-      }
-    }
-
-    /**
-     * Sets the position of the token in the source document.
-     */
-    public function position($l = null, $c = null) {
-        $this->line = $l;
-        $this->col  = $c;
-    }
-
-    /**
-     * Convenience function for DirectLex settings line/col position.
-     */
-    public function rawPosition($l, $c) {
-        if ($c === -1) $l++;
-        $this->line = $l;
-        $this->col  = $c;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Token/Comment.php b/extlib/HTMLPurifier/HTMLPurifier/Token/Comment.php
deleted file mode 100644
index dc6bdcabb8..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Token/Comment.php
+++ /dev/null
@@ -1,22 +0,0 @@
-<?php
-
-/**
- * Concrete comment token class. Generally will be ignored.
- */
-class HTMLPurifier_Token_Comment extends HTMLPurifier_Token
-{
-    public $data; /**< Character data within comment. */
-    public $is_whitespace = true;
-    /**
-     * Transparent constructor.
-     *
-     * @param $data String comment data.
-     */
-    public function __construct($data, $line = null, $col = null) {
-        $this->data = $data;
-        $this->line = $line;
-        $this->col  = $col;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Token/Empty.php b/extlib/HTMLPurifier/HTMLPurifier/Token/Empty.php
deleted file mode 100644
index 2a82b47ad1..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Token/Empty.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-/**
- * Concrete empty token class.
- */
-class HTMLPurifier_Token_Empty extends HTMLPurifier_Token_Tag
-{
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Token/End.php b/extlib/HTMLPurifier/HTMLPurifier/Token/End.php
deleted file mode 100644
index 353e79daf7..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Token/End.php
+++ /dev/null
@@ -1,19 +0,0 @@
-<?php
-
-/**
- * Concrete end token class.
- *
- * @warning This class accepts attributes even though end tags cannot. This
- * is for optimization reasons, as under normal circumstances, the Lexers
- * do not pass attributes.
- */
-class HTMLPurifier_Token_End extends HTMLPurifier_Token_Tag
-{
-    /**
-     * Token that started this node. Added by MakeWellFormed. Please
-     * do not edit this!
-     */
-    public $start;
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Token/Start.php b/extlib/HTMLPurifier/HTMLPurifier/Token/Start.php
deleted file mode 100644
index e0e14fc624..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Token/Start.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-/**
- * Concrete start token class.
- */
-class HTMLPurifier_Token_Start extends HTMLPurifier_Token_Tag
-{
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Token/Tag.php b/extlib/HTMLPurifier/HTMLPurifier/Token/Tag.php
deleted file mode 100644
index 798be028ee..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Token/Tag.php
+++ /dev/null
@@ -1,56 +0,0 @@
-<?php
-
-/**
- * Abstract class of a tag token (start, end or empty), and its behavior.
- */
-class HTMLPurifier_Token_Tag extends HTMLPurifier_Token
-{
-    /**
-     * Static bool marker that indicates the class is a tag.
-     *
-     * This allows us to check objects with <tt>!empty($obj->is_tag)</tt>
-     * without having to use a function call <tt>is_a()</tt>.
-     */
-    public $is_tag = true;
-
-    /**
-     * The lower-case name of the tag, like 'a', 'b' or 'blockquote'.
-     *
-     * @note Strictly speaking, XML tags are case sensitive, so we shouldn't
-     * be lower-casing them, but these tokens cater to HTML tags, which are
-     * insensitive.
-     */
-    public $name;
-
-    /**
-     * Associative array of the tag's attributes.
-     */
-    public $attr = array();
-
-    /**
-     * Non-overloaded constructor, which lower-cases passed tag name.
-     *
-     * @param $name String name.
-     * @param $attr Associative array of attributes.
-     */
-    public function __construct($name, $attr = array(), $line = null, $col = null) {
-        $this->name = ctype_lower($name) ? $name : strtolower($name);
-        foreach ($attr as $key => $value) {
-            // normalization only necessary when key is not lowercase
-            if (!ctype_lower($key)) {
-                $new_key = strtolower($key);
-                if (!isset($attr[$new_key])) {
-                    $attr[$new_key] = $attr[$key];
-                }
-                if ($new_key !== $key) {
-                    unset($attr[$key]);
-                }
-            }
-        }
-        $this->attr = $attr;
-        $this->line = $line;
-        $this->col  = $col;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/Token/Text.php b/extlib/HTMLPurifier/HTMLPurifier/Token/Text.php
deleted file mode 100644
index 82efd823d6..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/Token/Text.php
+++ /dev/null
@@ -1,33 +0,0 @@
-<?php
-
-/**
- * Concrete text token class.
- *
- * Text tokens comprise of regular parsed character data (PCDATA) and raw
- * character data (from the CDATA sections). Internally, their
- * data is parsed with all entities expanded. Surprisingly, the text token
- * does have a "tag name" called #PCDATA, which is how the DTD represents it
- * in permissible child nodes.
- */
-class HTMLPurifier_Token_Text extends HTMLPurifier_Token
-{
-
-    public $name = '#PCDATA'; /**< PCDATA tag name compatible with DTD. */
-    public $data; /**< Parsed character data of text. */
-    public $is_whitespace; /**< Bool indicating if node is whitespace. */
-
-    /**
-     * Constructor, accepts data and determines if it is whitespace.
-     *
-     * @param $data String parsed character data.
-     */
-    public function __construct($data, $line = null, $col = null) {
-        $this->data = $data;
-        $this->is_whitespace = ctype_space($data);
-        $this->line = $line;
-        $this->col  = $col;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/TokenFactory.php b/extlib/HTMLPurifier/HTMLPurifier/TokenFactory.php
deleted file mode 100644
index 7cf48fb41c..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/TokenFactory.php
+++ /dev/null
@@ -1,94 +0,0 @@
-<?php
-
-/**
- * Factory for token generation.
- *
- * @note Doing some benchmarking indicates that the new operator is much
- *       slower than the clone operator (even discounting the cost of the
- *       constructor).  This class is for that optimization.
- *       Other then that, there's not much point as we don't
- *       maintain parallel HTMLPurifier_Token hierarchies (the main reason why
- *       you'd want to use an abstract factory).
- * @todo Port DirectLex to use this
- */
-class HTMLPurifier_TokenFactory
-{
-
-    /**
-     * Prototypes that will be cloned.
-     * @private
-     */
-    // p stands for prototype
-    private $p_start, $p_end, $p_empty, $p_text, $p_comment;
-
-    /**
-     * Generates blank prototypes for cloning.
-     */
-    public function __construct() {
-        $this->p_start  = new HTMLPurifier_Token_Start('', array());
-        $this->p_end    = new HTMLPurifier_Token_End('');
-        $this->p_empty  = new HTMLPurifier_Token_Empty('', array());
-        $this->p_text   = new HTMLPurifier_Token_Text('');
-        $this->p_comment= new HTMLPurifier_Token_Comment('');
-    }
-
-    /**
-     * Creates a HTMLPurifier_Token_Start.
-     * @param $name Tag name
-     * @param $attr Associative array of attributes
-     * @return Generated HTMLPurifier_Token_Start
-     */
-    public function createStart($name, $attr = array()) {
-        $p = clone $this->p_start;
-        $p->__construct($name, $attr);
-        return $p;
-    }
-
-    /**
-     * Creates a HTMLPurifier_Token_End.
-     * @param $name Tag name
-     * @return Generated HTMLPurifier_Token_End
-     */
-    public function createEnd($name) {
-        $p = clone $this->p_end;
-        $p->__construct($name);
-        return $p;
-    }
-
-    /**
-     * Creates a HTMLPurifier_Token_Empty.
-     * @param $name Tag name
-     * @param $attr Associative array of attributes
-     * @return Generated HTMLPurifier_Token_Empty
-     */
-    public function createEmpty($name, $attr = array()) {
-        $p = clone $this->p_empty;
-        $p->__construct($name, $attr);
-        return $p;
-    }
-
-    /**
-     * Creates a HTMLPurifier_Token_Text.
-     * @param $data Data of text token
-     * @return Generated HTMLPurifier_Token_Text
-     */
-    public function createText($data) {
-        $p = clone $this->p_text;
-        $p->__construct($data);
-        return $p;
-    }
-
-    /**
-     * Creates a HTMLPurifier_Token_Comment.
-     * @param $data Data of comment token
-     * @return Generated HTMLPurifier_Token_Comment
-     */
-    public function createComment($data) {
-        $p = clone $this->p_comment;
-        $p->__construct($data);
-        return $p;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URI.php b/extlib/HTMLPurifier/HTMLPurifier/URI.php
deleted file mode 100644
index 8b50d0d18d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URI.php
+++ /dev/null
@@ -1,173 +0,0 @@
-<?php
-
-/**
- * HTML Purifier's internal representation of a URI.
- * @note
- *      Internal data-structures are completely escaped. If the data needs
- *      to be used in a non-URI context (which is very unlikely), be sure
- *      to decode it first. The URI may not necessarily be well-formed until
- *      validate() is called.
- */
-class HTMLPurifier_URI
-{
-
-    public $scheme, $userinfo, $host, $port, $path, $query, $fragment;
-
-    /**
-     * @note Automatically normalizes scheme and port
-     */
-    public function __construct($scheme, $userinfo, $host, $port, $path, $query, $fragment) {
-        $this->scheme = is_null($scheme) || ctype_lower($scheme) ? $scheme : strtolower($scheme);
-        $this->userinfo = $userinfo;
-        $this->host = $host;
-        $this->port = is_null($port) ? $port : (int) $port;
-        $this->path = $path;
-        $this->query = $query;
-        $this->fragment = $fragment;
-    }
-
-    /**
-     * Retrieves a scheme object corresponding to the URI's scheme/default
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return Scheme object appropriate for validating this URI
-     */
-    public function getSchemeObj($config, $context) {
-        $registry = HTMLPurifier_URISchemeRegistry::instance();
-        if ($this->scheme !== null) {
-            $scheme_obj = $registry->getScheme($this->scheme, $config, $context);
-            if (!$scheme_obj) return false; // invalid scheme, clean it out
-        } else {
-            // no scheme: retrieve the default one
-            $def = $config->getDefinition('URI');
-            $scheme_obj = $registry->getScheme($def->defaultScheme, $config, $context);
-            if (!$scheme_obj) {
-                // something funky happened to the default scheme object
-                trigger_error(
-                    'Default scheme object "' . $def->defaultScheme . '" was not readable',
-                    E_USER_WARNING
-                );
-                return false;
-            }
-        }
-        return $scheme_obj;
-    }
-
-    /**
-     * Generic validation method applicable for all schemes. May modify
-     * this URI in order to get it into a compliant form.
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return True if validation/filtering succeeds, false if failure
-     */
-    public function validate($config, $context) {
-
-        // ABNF definitions from RFC 3986
-        $chars_sub_delims = '!$&\'()*+,;=';
-        $chars_gen_delims = ':/?#[]@';
-        $chars_pchar = $chars_sub_delims . ':@';
-
-        // validate scheme (MUST BE FIRST!)
-        if (!is_null($this->scheme) && is_null($this->host)) {
-            $def = $config->getDefinition('URI');
-            if ($def->defaultScheme === $this->scheme) {
-                $this->scheme = null;
-            }
-        }
-
-        // validate host
-        if (!is_null($this->host)) {
-            $host_def = new HTMLPurifier_AttrDef_URI_Host();
-            $this->host = $host_def->validate($this->host, $config, $context);
-            if ($this->host === false) $this->host = null;
-        }
-
-        // validate username
-        if (!is_null($this->userinfo)) {
-            $encoder = new HTMLPurifier_PercentEncoder($chars_sub_delims . ':');
-            $this->userinfo = $encoder->encode($this->userinfo);
-        }
-
-        // validate port
-        if (!is_null($this->port)) {
-            if ($this->port < 1 || $this->port > 65535) $this->port = null;
-        }
-
-        // validate path
-        $path_parts = array();
-        $segments_encoder = new HTMLPurifier_PercentEncoder($chars_pchar . '/');
-        if (!is_null($this->host)) {
-            // path-abempty (hier and relative)
-            $this->path = $segments_encoder->encode($this->path);
-        } elseif ($this->path !== '' && $this->path[0] === '/') {
-            // path-absolute (hier and relative)
-            if (strlen($this->path) >= 2 && $this->path[1] === '/') {
-                // This shouldn't ever happen!
-                $this->path = '';
-            } else {
-                $this->path = $segments_encoder->encode($this->path);
-            }
-        } elseif (!is_null($this->scheme) && $this->path !== '') {
-            // path-rootless (hier)
-            // Short circuit evaluation means we don't need to check nz
-            $this->path = $segments_encoder->encode($this->path);
-        } elseif (is_null($this->scheme) && $this->path !== '') {
-            // path-noscheme (relative)
-            // (once again, not checking nz)
-            $segment_nc_encoder = new HTMLPurifier_PercentEncoder($chars_sub_delims . '@');
-            $c = strpos($this->path, '/');
-            if ($c !== false) {
-                $this->path =
-                    $segment_nc_encoder->encode(substr($this->path, 0, $c)) .
-                    $segments_encoder->encode(substr($this->path, $c));
-            } else {
-                $this->path = $segment_nc_encoder->encode($this->path);
-            }
-        } else {
-            // path-empty (hier and relative)
-            $this->path = ''; // just to be safe
-        }
-
-        // qf = query and fragment
-        $qf_encoder = new HTMLPurifier_PercentEncoder($chars_pchar . '/?');
-
-        if (!is_null($this->query)) {
-            $this->query = $qf_encoder->encode($this->query);
-        }
-
-        if (!is_null($this->fragment)) {
-            $this->fragment = $qf_encoder->encode($this->fragment);
-        }
-
-        return true;
-
-    }
-
-    /**
-     * Convert URI back to string
-     * @return String URI appropriate for output
-     */
-    public function toString() {
-        // reconstruct authority
-        $authority = null;
-        if (!is_null($this->host)) {
-            $authority = '';
-            if(!is_null($this->userinfo)) $authority .= $this->userinfo . '@';
-            $authority .= $this->host;
-            if(!is_null($this->port))     $authority .= ':' . $this->port;
-        }
-
-        // reconstruct the result
-        $result = '';
-        if (!is_null($this->scheme))    $result .= $this->scheme . ':';
-        if (!is_null($authority))       $result .=  '//' . $authority;
-        $result .= $this->path;
-        if (!is_null($this->query))     $result .= '?' . $this->query;
-        if (!is_null($this->fragment))  $result .= '#' . $this->fragment;
-
-        return $result;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIDefinition.php b/extlib/HTMLPurifier/HTMLPurifier/URIDefinition.php
deleted file mode 100644
index ea2b8fe245..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIDefinition.php
+++ /dev/null
@@ -1,93 +0,0 @@
-<?php
-
-class HTMLPurifier_URIDefinition extends HTMLPurifier_Definition
-{
-
-    public $type = 'URI';
-    protected $filters = array();
-    protected $postFilters = array();
-    protected $registeredFilters = array();
-
-    /**
-     * HTMLPurifier_URI object of the base specified at %URI.Base
-     */
-    public $base;
-
-    /**
-     * String host to consider "home" base, derived off of $base
-     */
-    public $host;
-
-    /**
-     * Name of default scheme based on %URI.DefaultScheme and %URI.Base
-     */
-    public $defaultScheme;
-
-    public function __construct() {
-        $this->registerFilter(new HTMLPurifier_URIFilter_DisableExternal());
-        $this->registerFilter(new HTMLPurifier_URIFilter_DisableExternalResources());
-        $this->registerFilter(new HTMLPurifier_URIFilter_HostBlacklist());
-        $this->registerFilter(new HTMLPurifier_URIFilter_MakeAbsolute());
-        $this->registerFilter(new HTMLPurifier_URIFilter_Munge());
-    }
-
-    public function registerFilter($filter) {
-        $this->registeredFilters[$filter->name] = $filter;
-    }
-
-    public function addFilter($filter, $config) {
-        $r = $filter->prepare($config);
-        if ($r === false) return; // null is ok, for backwards compat
-        if ($filter->post) {
-            $this->postFilters[$filter->name] = $filter;
-        } else {
-            $this->filters[$filter->name] = $filter;
-        }
-    }
-
-    protected function doSetup($config) {
-        $this->setupMemberVariables($config);
-        $this->setupFilters($config);
-    }
-
-    protected function setupFilters($config) {
-        foreach ($this->registeredFilters as $name => $filter) {
-            $conf = $config->get('URI.' . $name);
-            if ($conf !== false && $conf !== null) {
-                $this->addFilter($filter, $config);
-            }
-        }
-        unset($this->registeredFilters);
-    }
-
-    protected function setupMemberVariables($config) {
-        $this->host = $config->get('URI.Host');
-        $base_uri = $config->get('URI.Base');
-        if (!is_null($base_uri)) {
-            $parser = new HTMLPurifier_URIParser();
-            $this->base = $parser->parse($base_uri);
-            $this->defaultScheme = $this->base->scheme;
-            if (is_null($this->host)) $this->host = $this->base->host;
-        }
-        if (is_null($this->defaultScheme)) $this->defaultScheme = $config->get('URI.DefaultScheme');
-    }
-
-    public function filter(&$uri, $config, $context) {
-        foreach ($this->filters as $name => $f) {
-            $result = $f->filter($uri, $config, $context);
-            if (!$result) return false;
-        }
-        return true;
-    }
-
-    public function postFilter(&$uri, $config, $context) {
-        foreach ($this->postFilters as $name => $f) {
-            $result = $f->filter($uri, $config, $context);
-            if (!$result) return false;
-        }
-        return true;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIFilter.php b/extlib/HTMLPurifier/HTMLPurifier/URIFilter.php
deleted file mode 100644
index c116f93dff..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIFilter.php
+++ /dev/null
@@ -1,45 +0,0 @@
-<?php
-
-/**
- * Chainable filters for custom URI processing.
- *
- * These filters can perform custom actions on a URI filter object,
- * including transformation or blacklisting.
- *
- * @warning This filter is called before scheme object validation occurs.
- *          Make sure, if you require a specific scheme object, you
- *          you check that it exists. This allows filters to convert
- *          proprietary URI schemes into regular ones.
- */
-abstract class HTMLPurifier_URIFilter
-{
-
-    /**
-     * Unique identifier of filter
-     */
-    public $name;
-
-    /**
-     * True if this filter should be run after scheme validation.
-     */
-    public $post = false;
-
-    /**
-     * Performs initialization for the filter
-     */
-    public function prepare($config) {return true;}
-
-    /**
-     * Filter a URI object
-     * @param $uri Reference to URI object variable
-     * @param $config Instance of HTMLPurifier_Config
-     * @param $context Instance of HTMLPurifier_Context
-     * @return bool Whether or not to continue processing: false indicates
-     *         URL is no good, true indicates continue processing. Note that
-     *         all changes are committed directly on the URI object
-     */
-    abstract public function filter(&$uri, $config, $context);
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIFilter/DisableExternal.php b/extlib/HTMLPurifier/HTMLPurifier/URIFilter/DisableExternal.php
deleted file mode 100644
index d8a39a5011..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIFilter/DisableExternal.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-class HTMLPurifier_URIFilter_DisableExternal extends HTMLPurifier_URIFilter
-{
-    public $name = 'DisableExternal';
-    protected $ourHostParts = false;
-    public function prepare($config) {
-        $our_host = $config->getDefinition('URI')->host;
-        if ($our_host !== null) $this->ourHostParts = array_reverse(explode('.', $our_host));
-    }
-    public function filter(&$uri, $config, $context) {
-        if (is_null($uri->host)) return true;
-        if ($this->ourHostParts === false) return false;
-        $host_parts = array_reverse(explode('.', $uri->host));
-        foreach ($this->ourHostParts as $i => $x) {
-            if (!isset($host_parts[$i])) return false;
-            if ($host_parts[$i] != $this->ourHostParts[$i]) return false;
-        }
-        return true;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIFilter/DisableExternalResources.php b/extlib/HTMLPurifier/HTMLPurifier/URIFilter/DisableExternalResources.php
deleted file mode 100644
index 881abc43cf..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIFilter/DisableExternalResources.php
+++ /dev/null
@@ -1,12 +0,0 @@
-<?php
-
-class HTMLPurifier_URIFilter_DisableExternalResources extends HTMLPurifier_URIFilter_DisableExternal
-{
-    public $name = 'DisableExternalResources';
-    public function filter(&$uri, $config, $context) {
-        if (!$context->get('EmbeddedURI', true)) return true;
-        return parent::filter($uri, $config, $context);
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIFilter/HostBlacklist.php b/extlib/HTMLPurifier/HTMLPurifier/URIFilter/HostBlacklist.php
deleted file mode 100644
index 045aa0992c..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIFilter/HostBlacklist.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-class HTMLPurifier_URIFilter_HostBlacklist extends HTMLPurifier_URIFilter
-{
-    public $name = 'HostBlacklist';
-    protected $blacklist = array();
-    public function prepare($config) {
-        $this->blacklist = $config->get('URI.HostBlacklist');
-        return true;
-    }
-    public function filter(&$uri, $config, $context) {
-        foreach($this->blacklist as $blacklisted_host_fragment) {
-            if (strpos($uri->host, $blacklisted_host_fragment) !== false) {
-                return false;
-            }
-        }
-        return true;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIFilter/MakeAbsolute.php b/extlib/HTMLPurifier/HTMLPurifier/URIFilter/MakeAbsolute.php
deleted file mode 100644
index f46ab2630d..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIFilter/MakeAbsolute.php
+++ /dev/null
@@ -1,114 +0,0 @@
-<?php
-
-// does not support network paths
-
-class HTMLPurifier_URIFilter_MakeAbsolute extends HTMLPurifier_URIFilter
-{
-    public $name = 'MakeAbsolute';
-    protected $base;
-    protected $basePathStack = array();
-    public function prepare($config) {
-        $def = $config->getDefinition('URI');
-        $this->base = $def->base;
-        if (is_null($this->base)) {
-            trigger_error('URI.MakeAbsolute is being ignored due to lack of value for URI.Base configuration', E_USER_WARNING);
-            return false;
-        }
-        $this->base->fragment = null; // fragment is invalid for base URI
-        $stack = explode('/', $this->base->path);
-        array_pop($stack); // discard last segment
-        $stack = $this->_collapseStack($stack); // do pre-parsing
-        $this->basePathStack = $stack;
-        return true;
-    }
-    public function filter(&$uri, $config, $context) {
-        if (is_null($this->base)) return true; // abort early
-        if (
-            $uri->path === '' && is_null($uri->scheme) &&
-            is_null($uri->host) && is_null($uri->query) && is_null($uri->fragment)
-        ) {
-            // reference to current document
-            $uri = clone $this->base;
-            return true;
-        }
-        if (!is_null($uri->scheme)) {
-            // absolute URI already: don't change
-            if (!is_null($uri->host)) return true;
-            $scheme_obj = $uri->getSchemeObj($config, $context);
-            if (!$scheme_obj) {
-                // scheme not recognized
-                return false;
-            }
-            if (!$scheme_obj->hierarchical) {
-                // non-hierarchal URI with explicit scheme, don't change
-                return true;
-            }
-            // special case: had a scheme but always is hierarchical and had no authority
-        }
-        if (!is_null($uri->host)) {
-            // network path, don't bother
-            return true;
-        }
-        if ($uri->path === '') {
-            $uri->path = $this->base->path;
-        } elseif ($uri->path[0] !== '/') {
-            // relative path, needs more complicated processing
-            $stack = explode('/', $uri->path);
-            $new_stack = array_merge($this->basePathStack, $stack);
-            if ($new_stack[0] !== '' && !is_null($this->base->host)) {
-                array_unshift($new_stack, '');
-            }
-            $new_stack = $this->_collapseStack($new_stack);
-            $uri->path = implode('/', $new_stack);
-        } else {
-            // absolute path, but still we should collapse
-            $uri->path = implode('/', $this->_collapseStack(explode('/', $uri->path)));
-        }
-        // re-combine
-        $uri->scheme = $this->base->scheme;
-        if (is_null($uri->userinfo)) $uri->userinfo = $this->base->userinfo;
-        if (is_null($uri->host))     $uri->host     = $this->base->host;
-        if (is_null($uri->port))     $uri->port     = $this->base->port;
-        return true;
-    }
-
-    /**
-     * Resolve dots and double-dots in a path stack
-     */
-    private function _collapseStack($stack) {
-        $result = array();
-        $is_folder = false;
-        for ($i = 0; isset($stack[$i]); $i++) {
-            $is_folder = false;
-            // absorb an internally duplicated slash
-            if ($stack[$i] == '' && $i && isset($stack[$i+1])) continue;
-            if ($stack[$i] == '..') {
-                if (!empty($result)) {
-                    $segment = array_pop($result);
-                    if ($segment === '' && empty($result)) {
-                        // error case: attempted to back out too far:
-                        // restore the leading slash
-                        $result[] = '';
-                    } elseif ($segment === '..') {
-                        $result[] = '..'; // cannot remove .. with ..
-                    }
-                } else {
-                    // relative path, preserve the double-dots
-                    $result[] = '..';
-                }
-                $is_folder = true;
-                continue;
-            }
-            if ($stack[$i] == '.') {
-                // silently absorb
-                $is_folder = true;
-                continue;
-            }
-            $result[] = $stack[$i];
-        }
-        if ($is_folder) $result[] = '';
-        return $result;
-    }
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIFilter/Munge.php b/extlib/HTMLPurifier/HTMLPurifier/URIFilter/Munge.php
deleted file mode 100644
index efa10a6458..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIFilter/Munge.php
+++ /dev/null
@@ -1,58 +0,0 @@
-<?php
-
-class HTMLPurifier_URIFilter_Munge extends HTMLPurifier_URIFilter
-{
-    public $name = 'Munge';
-    public $post = true;
-    private $target, $parser, $doEmbed, $secretKey;
-
-    protected $replace = array();
-
-    public function prepare($config) {
-        $this->target    = $config->get('URI.' . $this->name);
-        $this->parser    = new HTMLPurifier_URIParser();
-        $this->doEmbed   = $config->get('URI.MungeResources');
-        $this->secretKey = $config->get('URI.MungeSecretKey');
-        return true;
-    }
-    public function filter(&$uri, $config, $context) {
-        if ($context->get('EmbeddedURI', true) && !$this->doEmbed) return true;
-
-        $scheme_obj = $uri->getSchemeObj($config, $context);
-        if (!$scheme_obj) return true; // ignore unknown schemes, maybe another postfilter did it
-        if (is_null($uri->host) || empty($scheme_obj->browsable)) {
-            return true;
-        }
-        // don't redirect if target host is our host
-        if ($uri->host === $config->getDefinition('URI')->host) {
-            return true;
-        }
-
-        $this->makeReplace($uri, $config, $context);
-        $this->replace = array_map('rawurlencode', $this->replace);
-
-        $new_uri = strtr($this->target, $this->replace);
-        $new_uri = $this->parser->parse($new_uri);
-        // don't redirect if the target host is the same as the
-        // starting host
-        if ($uri->host === $new_uri->host) return true;
-        $uri = $new_uri; // overwrite
-        return true;
-    }
-
-    protected function makeReplace($uri, $config, $context) {
-        $string = $uri->toString();
-        // always available
-        $this->replace['%s'] = $string;
-        $this->replace['%r'] = $context->get('EmbeddedURI', true);
-        $token = $context->get('CurrentToken', true);
-        $this->replace['%n'] = $token ? $token->name : null;
-        $this->replace['%m'] = $context->get('CurrentAttr', true);
-        $this->replace['%p'] = $context->get('CurrentCSSProperty', true);
-        // not always available
-        if ($this->secretKey) $this->replace['%t'] = sha1($this->secretKey . ':' . $string);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIParser.php b/extlib/HTMLPurifier/HTMLPurifier/URIParser.php
deleted file mode 100644
index 7179e4ab89..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIParser.php
+++ /dev/null
@@ -1,70 +0,0 @@
-<?php
-
-/**
- * Parses a URI into the components and fragment identifier as specified
- * by RFC 3986.
- */
-class HTMLPurifier_URIParser
-{
-
-    /**
-     * Instance of HTMLPurifier_PercentEncoder to do normalization with.
-     */
-    protected $percentEncoder;
-
-    public function __construct() {
-        $this->percentEncoder = new HTMLPurifier_PercentEncoder();
-    }
-
-    /**
-     * Parses a URI.
-     * @param $uri string URI to parse
-     * @return HTMLPurifier_URI representation of URI. This representation has
-     *         not been validated yet and may not conform to RFC.
-     */
-    public function parse($uri) {
-
-        $uri = $this->percentEncoder->normalize($uri);
-
-        // Regexp is as per Appendix B.
-        // Note that ["<>] are an addition to the RFC's recommended
-        // characters, because they represent external delimeters.
-        $r_URI = '!'.
-            '(([^:/?#"<>]+):)?'. // 2. Scheme
-            '(//([^/?#"<>]*))?'. // 4. Authority
-            '([^?#"<>]*)'.       // 5. Path
-            '(\?([^#"<>]*))?'.   // 7. Query
-            '(#([^"<>]*))?'.     // 8. Fragment
-            '!';
-
-        $matches = array();
-        $result = preg_match($r_URI, $uri, $matches);
-
-        if (!$result) return false; // *really* invalid URI
-
-        // seperate out parts
-        $scheme     = !empty($matches[1]) ? $matches[2] : null;
-        $authority  = !empty($matches[3]) ? $matches[4] : null;
-        $path       = $matches[5]; // always present, can be empty
-        $query      = !empty($matches[6]) ? $matches[7] : null;
-        $fragment   = !empty($matches[8]) ? $matches[9] : null;
-
-        // further parse authority
-        if ($authority !== null) {
-            $r_authority = "/^((.+?)@)?(\[[^\]]+\]|[^:]*)(:(\d*))?/";
-            $matches = array();
-            preg_match($r_authority, $authority, $matches);
-            $userinfo   = !empty($matches[1]) ? $matches[2] : null;
-            $host       = !empty($matches[3]) ? $matches[3] : '';
-            $port       = !empty($matches[4]) ? (int) $matches[5] : null;
-        } else {
-            $port = $host = $userinfo = null;
-        }
-
-        return new HTMLPurifier_URI(
-            $scheme, $userinfo, $host, $port, $path, $query, $fragment);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIScheme.php b/extlib/HTMLPurifier/HTMLPurifier/URIScheme.php
deleted file mode 100644
index 039710fd15..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIScheme.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-
-/**
- * Validator for the components of a URI for a specific scheme
- */
-class HTMLPurifier_URIScheme
-{
-
-    /**
-     * Scheme's default port (integer)
-     */
-    public $default_port = null;
-
-    /**
-     * Whether or not URIs of this schem are locatable by a browser
-     * http and ftp are accessible, while mailto and news are not.
-     */
-    public $browsable = false;
-
-    /**
-     * Whether or not the URI always uses <hier_part>, resolves edge cases
-     * with making relative URIs absolute
-     */
-    public $hierarchical = false;
-
-    /**
-     * Validates the components of a URI
-     * @note This implementation should be called by children if they define
-     *       a default port, as it does port processing.
-     * @param $uri Instance of HTMLPurifier_URI
-     * @param $config HTMLPurifier_Config object
-     * @param $context HTMLPurifier_Context object
-     * @return Bool success or failure
-     */
-    public function validate(&$uri, $config, $context) {
-        if ($this->default_port == $uri->port) $uri->port = null;
-        return true;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIScheme/ftp.php b/extlib/HTMLPurifier/HTMLPurifier/URIScheme/ftp.php
deleted file mode 100644
index 5849bf7ff0..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIScheme/ftp.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php
-
-/**
- * Validates ftp (File Transfer Protocol) URIs as defined by generic RFC 1738.
- */
-class HTMLPurifier_URIScheme_ftp extends HTMLPurifier_URIScheme {
-
-    public $default_port = 21;
-    public $browsable = true; // usually
-    public $hierarchical = true;
-
-    public function validate(&$uri, $config, $context) {
-        parent::validate($uri, $config, $context);
-        $uri->query    = null;
-
-        // typecode check
-        $semicolon_pos = strrpos($uri->path, ';'); // reverse
-        if ($semicolon_pos !== false) {
-            $type = substr($uri->path, $semicolon_pos + 1); // no semicolon
-            $uri->path = substr($uri->path, 0, $semicolon_pos);
-            $type_ret = '';
-            if (strpos($type, '=') !== false) {
-                // figure out whether or not the declaration is correct
-                list($key, $typecode) = explode('=', $type, 2);
-                if ($key !== 'type') {
-                    // invalid key, tack it back on encoded
-                    $uri->path .= '%3B' . $type;
-                } elseif ($typecode === 'a' || $typecode === 'i' || $typecode === 'd') {
-                    $type_ret = ";type=$typecode";
-                }
-            } else {
-                $uri->path .= '%3B' . $type;
-            }
-            $uri->path = str_replace(';', '%3B', $uri->path);
-            $uri->path .= $type_ret;
-        }
-
-        return true;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIScheme/http.php b/extlib/HTMLPurifier/HTMLPurifier/URIScheme/http.php
deleted file mode 100644
index b097a31d6a..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIScheme/http.php
+++ /dev/null
@@ -1,20 +0,0 @@
-<?php
-
-/**
- * Validates http (HyperText Transfer Protocol) as defined by RFC 2616
- */
-class HTMLPurifier_URIScheme_http extends HTMLPurifier_URIScheme {
-
-    public $default_port = 80;
-    public $browsable = true;
-    public $hierarchical = true;
-
-    public function validate(&$uri, $config, $context) {
-        parent::validate($uri, $config, $context);
-        $uri->userinfo = null;
-        return true;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIScheme/https.php b/extlib/HTMLPurifier/HTMLPurifier/URIScheme/https.php
deleted file mode 100644
index 29e380919f..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIScheme/https.php
+++ /dev/null
@@ -1,12 +0,0 @@
-<?php
-
-/**
- * Validates https (Secure HTTP) according to http scheme.
- */
-class HTMLPurifier_URIScheme_https extends HTMLPurifier_URIScheme_http {
-
-    public $default_port = 443;
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIScheme/mailto.php b/extlib/HTMLPurifier/HTMLPurifier/URIScheme/mailto.php
deleted file mode 100644
index c1e2cd5aae..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIScheme/mailto.php
+++ /dev/null
@@ -1,27 +0,0 @@
-<?php
-
-// VERY RELAXED! Shouldn't cause problems, not even Firefox checks if the
-// email is valid, but be careful!
-
-/**
- * Validates mailto (for E-mail) according to RFC 2368
- * @todo Validate the email address
- * @todo Filter allowed query parameters
- */
-
-class HTMLPurifier_URIScheme_mailto extends HTMLPurifier_URIScheme {
-
-    public $browsable = false;
-
-    public function validate(&$uri, $config, $context) {
-        parent::validate($uri, $config, $context);
-        $uri->userinfo = null;
-        $uri->host     = null;
-        $uri->port     = null;
-        // we need to validate path against RFC 2368's addr-spec
-        return true;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIScheme/news.php b/extlib/HTMLPurifier/HTMLPurifier/URIScheme/news.php
deleted file mode 100644
index f5f54f4f56..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIScheme/news.php
+++ /dev/null
@@ -1,22 +0,0 @@
-<?php
-
-/**
- * Validates news (Usenet) as defined by generic RFC 1738
- */
-class HTMLPurifier_URIScheme_news extends HTMLPurifier_URIScheme {
-
-    public $browsable = false;
-
-    public function validate(&$uri, $config, $context) {
-        parent::validate($uri, $config, $context);
-        $uri->userinfo = null;
-        $uri->host     = null;
-        $uri->port     = null;
-        $uri->query    = null;
-        // typecode check needed on path
-        return true;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URIScheme/nntp.php b/extlib/HTMLPurifier/HTMLPurifier/URIScheme/nntp.php
deleted file mode 100644
index 5bf93ea784..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URIScheme/nntp.php
+++ /dev/null
@@ -1,20 +0,0 @@
-<?php
-
-/**
- * Validates nntp (Network News Transfer Protocol) as defined by generic RFC 1738
- */
-class HTMLPurifier_URIScheme_nntp extends HTMLPurifier_URIScheme {
-
-    public $default_port = 119;
-    public $browsable = false;
-
-    public function validate(&$uri, $config, $context) {
-        parent::validate($uri, $config, $context);
-        $uri->userinfo = null;
-        $uri->query    = null;
-        return true;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/URISchemeRegistry.php b/extlib/HTMLPurifier/HTMLPurifier/URISchemeRegistry.php
deleted file mode 100644
index 576bf7b6d1..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/URISchemeRegistry.php
+++ /dev/null
@@ -1,68 +0,0 @@
-<?php
-
-/**
- * Registry for retrieving specific URI scheme validator objects.
- */
-class HTMLPurifier_URISchemeRegistry
-{
-
-    /**
-     * Retrieve sole instance of the registry.
-     * @param $prototype Optional prototype to overload sole instance with,
-     *                   or bool true to reset to default registry.
-     * @note Pass a registry object $prototype with a compatible interface and
-     *       the function will copy it and return it all further times.
-     */
-    public static function instance($prototype = null) {
-        static $instance = null;
-        if ($prototype !== null) {
-            $instance = $prototype;
-        } elseif ($instance === null || $prototype == true) {
-            $instance = new HTMLPurifier_URISchemeRegistry();
-        }
-        return $instance;
-    }
-
-    /**
-     * Cache of retrieved schemes.
-     */
-    protected $schemes = array();
-
-    /**
-     * Retrieves a scheme validator object
-     * @param $scheme String scheme name like http or mailto
-     * @param $config HTMLPurifier_Config object
-     * @param $config HTMLPurifier_Context object
-     */
-    public function getScheme($scheme, $config, $context) {
-        if (!$config) $config = HTMLPurifier_Config::createDefault();
-
-        // important, otherwise attacker could include arbitrary file
-        $allowed_schemes = $config->get('URI.AllowedSchemes');
-        if (!$config->get('URI.OverrideAllowedSchemes') &&
-            !isset($allowed_schemes[$scheme])
-        ) {
-            return;
-        }
-
-        if (isset($this->schemes[$scheme])) return $this->schemes[$scheme];
-        if (!isset($allowed_schemes[$scheme])) return;
-
-        $class = 'HTMLPurifier_URIScheme_' . $scheme;
-        if (!class_exists($class)) return;
-        $this->schemes[$scheme] = new $class();
-        return $this->schemes[$scheme];
-    }
-
-    /**
-     * Registers a custom scheme to the cache, bypassing reflection.
-     * @param $scheme Scheme name
-     * @param $scheme_obj HTMLPurifier_URIScheme object
-     */
-    public function register($scheme, $scheme_obj) {
-        $this->schemes[$scheme] = $scheme_obj;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/UnitConverter.php b/extlib/HTMLPurifier/HTMLPurifier/UnitConverter.php
deleted file mode 100644
index 545d426220..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/UnitConverter.php
+++ /dev/null
@@ -1,254 +0,0 @@
-<?php
-
-/**
- * Class for converting between different unit-lengths as specified by
- * CSS.
- */
-class HTMLPurifier_UnitConverter
-{
-
-    const ENGLISH = 1;
-    const METRIC = 2;
-    const DIGITAL = 3;
-
-    /**
-     * Units information array. Units are grouped into measuring systems
-     * (English, Metric), and are assigned an integer representing
-     * the conversion factor between that unit and the smallest unit in
-     * the system. Numeric indexes are actually magical constants that
-     * encode conversion data from one system to the next, with a O(n^2)
-     * constraint on memory (this is generally not a problem, since
-     * the number of measuring systems is small.)
-     */
-    protected static $units = array(
-        self::ENGLISH => array(
-            'px' => 3, // This is as per CSS 2.1 and Firefox. Your mileage may vary
-            'pt' => 4,
-            'pc' => 48,
-            'in' => 288,
-            self::METRIC => array('pt', '0.352777778', 'mm'),
-        ),
-        self::METRIC => array(
-            'mm' => 1,
-            'cm' => 10,
-            self::ENGLISH => array('mm', '2.83464567', 'pt'),
-        ),
-    );
-
-    /**
-     * Minimum bcmath precision for output.
-     */
-    protected $outputPrecision;
-
-    /**
-     * Bcmath precision for internal calculations.
-     */
-    protected $internalPrecision;
-
-    /**
-     * Whether or not BCMath is available
-     */
-    private $bcmath;
-
-    public function __construct($output_precision = 4, $internal_precision = 10, $force_no_bcmath = false) {
-        $this->outputPrecision = $output_precision;
-        $this->internalPrecision = $internal_precision;
-        $this->bcmath = !$force_no_bcmath && function_exists('bcmul');
-    }
-
-    /**
-     * Converts a length object of one unit into another unit.
-     * @param HTMLPurifier_Length $length
-     *      Instance of HTMLPurifier_Length to convert. You must validate()
-     *      it before passing it here!
-     * @param string $to_unit
-     *      Unit to convert to.
-     * @note
-     *      About precision: This conversion function pays very special
-     *      attention to the incoming precision of values and attempts
-     *      to maintain a number of significant figure. Results are
-     *      fairly accurate up to nine digits. Some caveats:
-     *          - If a number is zero-padded as a result of this significant
-     *            figure tracking, the zeroes will be eliminated.
-     *          - If a number contains less than four sigfigs ($outputPrecision)
-     *            and this causes some decimals to be excluded, those
-     *            decimals will be added on.
-     */
-    public function convert($length, $to_unit) {
-
-        if (!$length->isValid()) return false;
-
-        $n    = $length->getN();
-        $unit = $length->getUnit();
-
-        if ($n === '0' || $unit === false) {
-            return new HTMLPurifier_Length('0', false);
-        }
-
-        $state = $dest_state = false;
-        foreach (self::$units as $k => $x) {
-            if (isset($x[$unit])) $state = $k;
-            if (isset($x[$to_unit])) $dest_state = $k;
-        }
-        if (!$state || !$dest_state) return false;
-
-        // Some calculations about the initial precision of the number;
-        // this will be useful when we need to do final rounding.
-        $sigfigs = $this->getSigFigs($n);
-        if ($sigfigs < $this->outputPrecision) $sigfigs = $this->outputPrecision;
-
-        // BCMath's internal precision deals only with decimals. Use
-        // our default if the initial number has no decimals, or increase
-        // it by how ever many decimals, thus, the number of guard digits
-        // will always be greater than or equal to internalPrecision.
-        $log = (int) floor(log(abs($n), 10));
-        $cp = ($log < 0) ? $this->internalPrecision - $log : $this->internalPrecision; // internal precision
-
-        for ($i = 0; $i < 2; $i++) {
-
-            // Determine what unit IN THIS SYSTEM we need to convert to
-            if ($dest_state === $state) {
-                // Simple conversion
-                $dest_unit = $to_unit;
-            } else {
-                // Convert to the smallest unit, pending a system shift
-                $dest_unit = self::$units[$state][$dest_state][0];
-            }
-
-            // Do the conversion if necessary
-            if ($dest_unit !== $unit) {
-                $factor = $this->div(self::$units[$state][$unit], self::$units[$state][$dest_unit], $cp);
-                $n = $this->mul($n, $factor, $cp);
-                $unit = $dest_unit;
-            }
-
-            // Output was zero, so bail out early. Shouldn't ever happen.
-            if ($n === '') {
-                $n = '0';
-                $unit = $to_unit;
-                break;
-            }
-
-            // It was a simple conversion, so bail out
-            if ($dest_state === $state) {
-                break;
-            }
-
-            if ($i !== 0) {
-                // Conversion failed! Apparently, the system we forwarded
-                // to didn't have this unit. This should never happen!
-                return false;
-            }
-
-            // Pre-condition: $i == 0
-
-            // Perform conversion to next system of units
-            $n = $this->mul($n, self::$units[$state][$dest_state][1], $cp);
-            $unit = self::$units[$state][$dest_state][2];
-            $state = $dest_state;
-
-            // One more loop around to convert the unit in the new system.
-
-        }
-
-        // Post-condition: $unit == $to_unit
-        if ($unit !== $to_unit) return false;
-
-        // Useful for debugging:
-        //echo "<pre>n";
-        //echo "$n\nsigfigs = $sigfigs\nnew_log = $new_log\nlog = $log\nrp = $rp\n</pre>\n";
-
-        $n = $this->round($n, $sigfigs);
-        if (strpos($n, '.') !== false) $n = rtrim($n, '0');
-        $n = rtrim($n, '.');
-
-        return new HTMLPurifier_Length($n, $unit);
-    }
-
-    /**
-     * Returns the number of significant figures in a string number.
-     * @param string $n Decimal number
-     * @return int number of sigfigs
-     */
-    public function getSigFigs($n) {
-        $n = ltrim($n, '0+-');
-        $dp = strpos($n, '.'); // decimal position
-        if ($dp === false) {
-            $sigfigs = strlen(rtrim($n, '0'));
-        } else {
-            $sigfigs = strlen(ltrim($n, '0.')); // eliminate extra decimal character
-            if ($dp !== 0) $sigfigs--;
-        }
-        return $sigfigs;
-    }
-
-    /**
-     * Adds two numbers, using arbitrary precision when available.
-     */
-    private function add($s1, $s2, $scale) {
-        if ($this->bcmath) return bcadd($s1, $s2, $scale);
-        else return $this->scale($s1 + $s2, $scale);
-    }
-
-    /**
-     * Multiples two numbers, using arbitrary precision when available.
-     */
-    private function mul($s1, $s2, $scale) {
-        if ($this->bcmath) return bcmul($s1, $s2, $scale);
-        else return $this->scale($s1 * $s2, $scale);
-    }
-
-    /**
-     * Divides two numbers, using arbitrary precision when available.
-     */
-    private function div($s1, $s2, $scale) {
-        if ($this->bcmath) return bcdiv($s1, $s2, $scale);
-        else return $this->scale($s1 / $s2, $scale);
-    }
-
-    /**
-     * Rounds a number according to the number of sigfigs it should have,
-     * using arbitrary precision when available.
-     */
-    private function round($n, $sigfigs) {
-        $new_log = (int) floor(log(abs($n), 10)); // Number of digits left of decimal - 1
-        $rp = $sigfigs - $new_log - 1; // Number of decimal places needed
-        $neg = $n < 0 ? '-' : ''; // Negative sign
-        if ($this->bcmath) {
-            if ($rp >= 0) {
-                $n = bcadd($n, $neg . '0.' .  str_repeat('0', $rp) . '5', $rp + 1);
-                $n = bcdiv($n, '1', $rp);
-            } else {
-                // This algorithm partially depends on the standardized
-                // form of numbers that comes out of bcmath.
-                $n = bcadd($n, $neg . '5' . str_repeat('0', $new_log - $sigfigs), 0);
-                $n = substr($n, 0, $sigfigs + strlen($neg)) . str_repeat('0', $new_log - $sigfigs + 1);
-            }
-            return $n;
-        } else {
-            return $this->scale(round($n, $sigfigs - $new_log - 1), $rp + 1);
-        }
-    }
-
-    /**
-     * Scales a float to $scale digits right of decimal point, like BCMath.
-     */
-    private function scale($r, $scale) {
-        if ($scale < 0) {
-            // The f sprintf type doesn't support negative numbers, so we
-            // need to cludge things manually. First get the string.
-            $r = sprintf('%.0f', (float) $r);
-            // Due to floating point precision loss, $r will more than likely
-            // look something like 4652999999999.9234. We grab one more digit
-            // than we need to precise from $r and then use that to round
-            // appropriately.
-            $precise = (string) round(substr($r, 0, strlen($r) + $scale), -1);
-            // Now we return it, truncating the zero that was rounded off.
-            return substr($precise, 0, -1) . str_repeat('0', -$scale + 1);
-        }
-        return sprintf('%.' . $scale . 'f', (float) $r);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/VarParser.php b/extlib/HTMLPurifier/HTMLPurifier/VarParser.php
deleted file mode 100644
index 68e72ae869..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/VarParser.php
+++ /dev/null
@@ -1,154 +0,0 @@
-<?php
-
-/**
- * Parses string representations into their corresponding native PHP
- * variable type. The base implementation does a simple type-check.
- */
-class HTMLPurifier_VarParser
-{
-
-    const STRING    = 1;
-    const ISTRING   = 2;
-    const TEXT      = 3;
-    const ITEXT     = 4;
-    const INT       = 5;
-    const FLOAT     = 6;
-    const BOOL      = 7;
-    const LOOKUP    = 8;
-    const ALIST     = 9;
-    const HASH      = 10;
-    const MIXED     = 11;
-
-    /**
-     * Lookup table of allowed types. Mainly for backwards compatibility, but
-     * also convenient for transforming string type names to the integer constants.
-     */
-    static public $types = array(
-        'string'    => self::STRING,
-        'istring'   => self::ISTRING,
-        'text'      => self::TEXT,
-        'itext'     => self::ITEXT,
-        'int'       => self::INT,
-        'float'     => self::FLOAT,
-        'bool'      => self::BOOL,
-        'lookup'    => self::LOOKUP,
-        'list'      => self::ALIST,
-        'hash'      => self::HASH,
-        'mixed'     => self::MIXED
-    );
-
-    /**
-     * Lookup table of types that are string, and can have aliases or
-     * allowed value lists.
-     */
-    static public $stringTypes = array(
-        self::STRING    => true,
-        self::ISTRING   => true,
-        self::TEXT      => true,
-        self::ITEXT     => true,
-    );
-
-    /**
-     * Validate a variable according to type. Throws
-     * HTMLPurifier_VarParserException if invalid.
-     * It may return NULL as a valid type if $allow_null is true.
-     *
-     * @param $var Variable to validate
-     * @param $type Type of variable, see HTMLPurifier_VarParser->types
-     * @param $allow_null Whether or not to permit null as a value
-     * @return Validated and type-coerced variable
-     */
-    final public function parse($var, $type, $allow_null = false) {
-        if (is_string($type)) {
-            if (!isset(HTMLPurifier_VarParser::$types[$type])) {
-                throw new HTMLPurifier_VarParserException("Invalid type '$type'");
-            } else {
-                $type = HTMLPurifier_VarParser::$types[$type];
-            }
-        }
-        $var = $this->parseImplementation($var, $type, $allow_null);
-        if ($allow_null && $var === null) return null;
-        // These are basic checks, to make sure nothing horribly wrong
-        // happened in our implementations.
-        switch ($type) {
-            case (self::STRING):
-            case (self::ISTRING):
-            case (self::TEXT):
-            case (self::ITEXT):
-                if (!is_string($var)) break;
-                if ($type == self::ISTRING || $type == self::ITEXT) $var = strtolower($var);
-                return $var;
-            case (self::INT):
-                if (!is_int($var)) break;
-                return $var;
-            case (self::FLOAT):
-                if (!is_float($var)) break;
-                return $var;
-            case (self::BOOL):
-                if (!is_bool($var)) break;
-                return $var;
-            case (self::LOOKUP):
-            case (self::ALIST):
-            case (self::HASH):
-                if (!is_array($var)) break;
-                if ($type === self::LOOKUP) {
-                    foreach ($var as $k) if ($k !== true) $this->error('Lookup table contains value other than true');
-                } elseif ($type === self::ALIST) {
-                    $keys = array_keys($var);
-                    if (array_keys($keys) !== $keys) $this->error('Indices for list are not uniform');
-                }
-                return $var;
-            case (self::MIXED):
-                return $var;
-            default:
-                $this->errorInconsistent(get_class($this), $type);
-        }
-        $this->errorGeneric($var, $type);
-    }
-
-    /**
-     * Actually implements the parsing. Base implementation is to not
-     * do anything to $var. Subclasses should overload this!
-     */
-    protected function parseImplementation($var, $type, $allow_null) {
-        return $var;
-    }
-
-    /**
-     * Throws an exception.
-     */
-    protected function error($msg) {
-        throw new HTMLPurifier_VarParserException($msg);
-    }
-
-    /**
-     * Throws an inconsistency exception.
-     * @note This should not ever be called. It would be called if we
-     *       extend the allowed values of HTMLPurifier_VarParser without
-     *       updating subclasses.
-     */
-    protected function errorInconsistent($class, $type) {
-        throw new HTMLPurifier_Exception("Inconsistency in $class: ".HTMLPurifier_VarParser::getTypeName($type)." not implemented");
-    }
-
-    /**
-     * Generic error for if a type didn't work.
-     */
-    protected function errorGeneric($var, $type) {
-        $vtype = gettype($var);
-        $this->error("Expected type ".HTMLPurifier_VarParser::getTypeName($type).", got $vtype");
-    }
-
-    static public function getTypeName($type) {
-        static $lookup;
-        if (!$lookup) {
-            // Lazy load the alternative lookup table
-            $lookup = array_flip(HTMLPurifier_VarParser::$types);
-        }
-        if (!isset($lookup[$type])) return 'unknown';
-        return $lookup[$type];
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/VarParser/Flexible.php b/extlib/HTMLPurifier/HTMLPurifier/VarParser/Flexible.php
deleted file mode 100644
index c954250e9f..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/VarParser/Flexible.php
+++ /dev/null
@@ -1,96 +0,0 @@
-<?php
-
-/**
- * Performs safe variable parsing based on types which can be used by
- * users. This may not be able to represent all possible data inputs,
- * however.
- */
-class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser
-{
-
-    protected function parseImplementation($var, $type, $allow_null) {
-        if ($allow_null && $var === null) return null;
-        switch ($type) {
-            // Note: if code "breaks" from the switch, it triggers a generic
-            // exception to be thrown. Specific errors can be specifically
-            // done here.
-            case self::MIXED :
-            case self::ISTRING :
-            case self::STRING :
-            case self::TEXT :
-            case self::ITEXT :
-                return $var;
-            case self::INT :
-                if (is_string($var) && ctype_digit($var)) $var = (int) $var;
-                return $var;
-            case self::FLOAT :
-                if ((is_string($var) && is_numeric($var)) || is_int($var)) $var = (float) $var;
-                return $var;
-            case self::BOOL :
-                if (is_int($var) && ($var === 0 || $var === 1)) {
-                    $var = (bool) $var;
-                } elseif (is_string($var)) {
-                    if ($var == 'on' || $var == 'true' || $var == '1') {
-                        $var = true;
-                    } elseif ($var == 'off' || $var == 'false' || $var == '0') {
-                        $var = false;
-                    } else {
-                        throw new HTMLPurifier_VarParserException("Unrecognized value '$var' for $type");
-                    }
-                }
-                return $var;
-            case self::ALIST :
-            case self::HASH :
-            case self::LOOKUP :
-                if (is_string($var)) {
-                    // special case: technically, this is an array with
-                    // a single empty string item, but having an empty
-                    // array is more intuitive
-                    if ($var == '') return array();
-                    if (strpos($var, "\n") === false && strpos($var, "\r") === false) {
-                        // simplistic string to array method that only works
-                        // for simple lists of tag names or alphanumeric characters
-                        $var = explode(',',$var);
-                    } else {
-                        $var = preg_split('/(,|[\n\r]+)/', $var);
-                    }
-                    // remove spaces
-                    foreach ($var as $i => $j) $var[$i] = trim($j);
-                    if ($type === self::HASH) {
-                        // key:value,key2:value2
-                        $nvar = array();
-                        foreach ($var as $keypair) {
-                            $c = explode(':', $keypair, 2);
-                            if (!isset($c[1])) continue;
-                            $nvar[$c[0]] = $c[1];
-                        }
-                        $var = $nvar;
-                    }
-                }
-                if (!is_array($var)) break;
-                $keys = array_keys($var);
-                if ($keys === array_keys($keys)) {
-                    if ($type == self::ALIST) return $var;
-                    elseif ($type == self::LOOKUP) {
-                        $new = array();
-                        foreach ($var as $key) {
-                            $new[$key] = true;
-                        }
-                        return $new;
-                    } else break;
-                }
-                if ($type === self::LOOKUP) {
-                    foreach ($var as $key => $value) {
-                        $var[$key] = true;
-                    }
-                }
-                return $var;
-            default:
-                $this->errorInconsistent(__CLASS__, $type);
-        }
-        $this->errorGeneric($var, $type);
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/VarParser/Native.php b/extlib/HTMLPurifier/HTMLPurifier/VarParser/Native.php
deleted file mode 100644
index b02a6de54c..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/VarParser/Native.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-
-/**
- * This variable parser uses PHP's internal code engine. Because it does
- * this, it can represent all inputs; however, it is dangerous and cannot
- * be used by users.
- */
-class HTMLPurifier_VarParser_Native extends HTMLPurifier_VarParser
-{
-
-    protected function parseImplementation($var, $type, $allow_null) {
-        return $this->evalExpression($var);
-    }
-
-    protected function evalExpression($expr) {
-        $var = null;
-        $result = eval("\$var = $expr;");
-        if ($result === false) {
-            throw new HTMLPurifier_VarParserException("Fatal error in evaluated code");
-        }
-        return $var;
-    }
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/HTMLPurifier/VarParserException.php b/extlib/HTMLPurifier/HTMLPurifier/VarParserException.php
deleted file mode 100644
index 5df3414959..0000000000
--- a/extlib/HTMLPurifier/HTMLPurifier/VarParserException.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-/**
- * Exception type for HTMLPurifier_VarParser
- */
-class HTMLPurifier_VarParserException extends HTMLPurifier_Exception
-{
-
-}
-
-// vim: et sw=4 sts=4
diff --git a/extlib/HTMLPurifier/LICENSE b/extlib/HTMLPurifier/LICENSE
deleted file mode 100644
index 8c88a20d45..0000000000
--- a/extlib/HTMLPurifier/LICENSE
+++ /dev/null
@@ -1,504 +0,0 @@
-		  GNU LESSER GENERAL PUBLIC LICENSE
-		       Version 2.1, February 1999
-
- Copyright (C) 1991, 1999 Free Software Foundation, Inc.
- 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- Everyone is permitted to copy and distribute verbatim copies
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-  To apply these terms, attach the following notices to the library.  It is
-safest to attach them to the start of each source file to most effectively
-convey the exclusion of warranty; and each file should have at least the
-"copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the library's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This library is free software; you can redistribute it and/or
-    modify it under the terms of the GNU Lesser General Public
-    License as published by the Free Software Foundation; either
-    version 2.1 of the License, or (at your option) any later version.
-
-    This library is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-    Lesser General Public License for more details.
-
-    You should have received a copy of the GNU Lesser General Public
-    License along with this library; if not, write to the Free Software
-    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
-
-Also add information on how to contact you by electronic and paper mail.
-
-You should also get your employer (if you work as a programmer) or your
-school, if any, to sign a "copyright disclaimer" for the library, if
-necessary.  Here is a sample; alter the names:
-
-  Yoyodyne, Inc., hereby disclaims all copyright interest in the
-  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
-
-  <signature of Ty Coon>, 1 April 1990
-  Ty Coon, President of Vice
-
-That's all there is to it!
-
-    vim: et sw=4 sts=4
diff --git a/plugins/OStatus/README b/plugins/OStatus/README
index 09a59e3497..3a98b7b256 100644
--- a/plugins/OStatus/README
+++ b/plugins/OStatus/README
@@ -12,10 +12,6 @@ $config['ostatus']['hub_retries']
     (default 0)
     Number of times to retry a PuSH send to consumers if using internal hub
 
-$config['ostatus']['purify_cache']
-    (default cache disabled)
-    Set to a writable cache directory for HTMLPurifier's configuration settings, can speed up processing of remote messages (have not tested by how much)
-
 
 For testing, shouldn't be used in production:
 
diff --git a/plugins/OStatus/classes/Ostatus_profile.php b/plugins/OStatus/classes/Ostatus_profile.php
index 33b0ceb9ef..a366c1c2cf 100644
--- a/plugins/OStatus/classes/Ostatus_profile.php
+++ b/plugins/OStatus/classes/Ostatus_profile.php
@@ -668,28 +668,9 @@ class Ostatus_profile extends Memcached_DataObject
      */
     protected function purify($html)
     {
-        require_once(INSTALLDIR.'/extlib/HTMLPurifier/HTMLPurifier.auto.php');
-
-        // By default Purifier wants to cache data to its own code directories,
-        // and spews error messages if they're not writable.
-        $config = HTMLPurifier_Config::createDefault();
-        if (common_config('ostatus', 'purify_cache')) {
-            $config->set('Cache.SerializerPath', common_config('ostatus', 'purify_cache'));
-        } else {
-            // Although recommended in the documentation, this produces a notice:
-            //    "Core.DefinitionCache is an alias, preferred directive name is Cache.DefinitionImpl"
-            // If I then follow *those* directions, I get a warning and it doesn't work:
-            //    "Cannot set undefined directive Core.DefinitionImpl"
-            // So... lesser of two evils. Suppressing the notice from output,
-            // though it'll still be seen and logged by StatusNet's error handler.
-            $old = error_reporting();
-            error_reporting($old & ~E_NOTICE);
-            $config->set('Core.DefinitionCache', null);
-            error_reporting($old);
-        }
-
-        $purifier = new HTMLPurifier($config);
-        return $purifier->purify($html);
+        require_once INSTALLDIR.'/extlib/htmLawed/htmLawed.php';
+        $config = array('safe' => 1);
+        return htmLawed($html, $config);
     }
 
     /**