forked from GNUsocial/gnu-social
350 lines
12 KiB
PHP
350 lines
12 KiB
PHP
<?php
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/**
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2010, StatusNet, Inc.
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*
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* Use TinyMCE library to allow rich text editing in the browser
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*
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* PHP version 5
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category WYSIWYG
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @copyright 2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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* @link http://status.net/
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*/
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if (!defined('STATUSNET')) {
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// This check helps protect against security problems;
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// your code file can't be executed directly from the web.
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exit(1);
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}
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/**
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* Use TinyMCE library to allow rich text editing in the browser
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*
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* Converts the notice form in browser to a rich-text editor.
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*
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* @category WYSIWYG
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @copyright 2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
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* @link http://status.net/
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*/
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class TinyMCEPlugin extends Plugin
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{
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var $html;
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// By default, TinyMCE editor will be available to all users.
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// With restricted on, only users who have been granted the
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// "richedit" role get it.
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public $restricted = false;
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function onEndShowScripts($action)
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{
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if (common_logged_in() && $this->isAllowedRichEdit()) {
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$action->script(common_path('plugins/TinyMCE/js/jquery.tinymce.js'));
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$action->inlineScript($this->_inlineScript());
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}
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return true;
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}
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function onEndShowStyles($action)
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{
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if ($this->isAllowedRichEdit()) {
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$action->style('span#notice_data-text_container, span#notice_data-text_parent { float: left }');
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}
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return true;
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}
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function onPluginVersion(&$versions)
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{
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$versions[] = array('name' => 'TinyMCE',
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'version' => STATUSNET_VERSION,
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'author' => 'Evan Prodromou',
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'homepage' => 'http://status.net/wiki/Plugin:TinyMCE',
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'rawdescription' =>
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_m('Use TinyMCE library to allow rich text editing in the browser.'));
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return true;
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}
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/**
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* Sanitize HTML input and strip out potentially dangerous bits.
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*
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* @param string $raw HTML
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* @return string HTML
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*/
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private function sanitizeHtml($raw)
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{
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require_once INSTALLDIR . '/extlib/htmLawed/htmLawed.php';
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$config = array('safe' => 1,
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'deny_attribute' => 'id,style,on*');
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return htmLawed($raw, $config);
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}
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/**
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* Strip HTML to plaintext string
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*
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* @param string $html HTML
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* @return string plaintext, single line
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*/
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private function stripHtml($html)
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{
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return str_replace("\n", " ", html_entity_decode(strip_tags($html), ENT_QUOTES, 'UTF-8'));
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}
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/**
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* Hook for new-notice form processing to take our HTML goodies;
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* won't affect API posting etc.
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*
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* @param NewNoticeAction $action
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* @param User $user
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* @param string $content
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* @param array $options
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* @return boolean hook return
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*/
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function onStartSaveNewNoticeWeb($action, $user, &$content, &$options)
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{
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if ($action->arg('richedit') && $this->isAllowedRichEdit()) {
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$html = $this->sanitizeHtml($content);
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$options['rendered'] = $html;
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$content = $this->stripHtml($html);
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}
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return true;
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}
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/**
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* Hook for new-notice form processing to process file upload appending...
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*
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* @param NewNoticeAction $action
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* @param MediaFile $media
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* @param string $content
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* @param array $options
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* @return boolean hook return
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*/
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function onStartSaveNewNoticeAppendAttachment($action, $media, &$content, &$options)
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{
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if ($action->arg('richedit') && $this->isAllowedRichEdit()) {
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// See if we've got a placeholder inline image; if so, fill it!
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$dom = new DOMDocument();
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if ($dom->loadHTML($options['rendered'])) {
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$imgs = $dom->getElementsByTagName('img');
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foreach ($imgs as $img) {
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if (preg_match('/(^| )placeholder( |$)/', $img->getAttribute('class'))) {
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// Create a link to the attachment page...
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$this->formatAttachment($img, $media);
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}
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}
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$options['rendered'] = $this->saveHtml($dom);
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}
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// The regular code will append the short URL to the plaintext content.
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// Carry on and let it through...
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}
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return true;
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}
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/**
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* Format the attachment placeholder img with the final version.
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*
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* @param DOMElement $img
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* @param MediaFile $media
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*/
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private function formatAttachment($img, $media)
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{
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$parent = $img->parentNode;
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$dom = $img->ownerDocument;
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$link = $dom->createElement('a');
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$link->setAttribute('href', $media->fileurl);
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$link->setAttribute('title', File::url($media->filename));
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if ($this->isEmbeddable($media)) {
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// Fix the the <img> attributes and wrap the link around it...
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$this->insertImage($img, $media);
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$parent->replaceChild($link, $img); //it dies in here?!
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$link->appendChild($img);
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} else {
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// Not an image? Replace it with a text link.
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$link->setAttribute('rel', 'external');
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$link->setAttribute('class', 'attachment');
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$link->setAttribute('id', 'attachment-' . $media->fileRecord->id);
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$text = $dom->createTextNode($media->shortUrl());
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$link->appendChild($text);
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$parent->replaceChild($link, $img);
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}
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}
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/**
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* Is this media file a type we can display inline?
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*
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* @param MediaFile $media
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* @return boolean
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*/
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private function isEmbeddable($media)
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{
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$showable = array('image/png',
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'image/gif',
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'image/jpeg');
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return in_array($media->mimetype, $showable);
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}
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/**
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* Rewrite and resize a placeholder image element to match the uploaded
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* file. If the holder is smaller than the file, the file is scaled to fit
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* with correct aspect ratio (but will be loaded at full resolution).
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*
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* @param DOMElement $img
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* @param MediaFile $media
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*/
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private function insertImage($img, $media)
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{
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$img->setAttribute('src', $media->fileRecord->url);
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$holderWidth = intval($img->getAttribute('width'));
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$holderHeight = intval($img->getAttribute('height'));
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$path = File::path($media->filename);
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$imgInfo = getimagesize($path);
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if ($imgInfo) {
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$origWidth = $imgInfo[0];
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$origHeight = $imgInfo[1];
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list($width, $height) = $this->sizeBox(
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$origWidth, $origHeight,
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$holderWidth, $holderHeight);
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$img->setAttribute('width', $width);
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$img->setAttribute('height', $height);
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}
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}
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/**
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*
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* @param int $origWidth
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* @param int $origHeight
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* @param int $holderWidth
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* @param int $holderHeight
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* @return array($width, $height)
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*/
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private function sizeBox($origWidth, $origHeight, $holderWidth, $holderHeight)
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{
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$holderAspect = $holderWidth / $holderHeight;
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$origAspect = $origWidth / $origHeight;
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if ($origAspect >= 1.0) {
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// wide image
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if ($origWidth > $holderWidth) {
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return array($holderWidth, intval($holderWidth / $origAspect));
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} else {
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return array($origWidth, $origHeight);
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}
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} else {
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if ($origHeight > $holderHeight) {
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return array(intval($holderWidth * $origAspect), $holderHeight);
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} else {
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return array($origWidth, $origHeight);
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}
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}
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}
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private function saveHtml($dom)
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{
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$html = $dom->saveHTML();
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// hack to remove surrounding crap added to the dom
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// all we wanted was a fragment
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$stripped = preg_replace('/^.*<body[^>]*>(.*)<\/body.*$/is', '$1', $html);
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return $stripped;
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}
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function _inlineScript()
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{
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$path = common_path('plugins/TinyMCE/js/tiny_mce.js');
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$placeholder = common_path('plugins/TinyMCE/icons/placeholder.png');
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// Note: the normal on-submit triggering to save data from
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// the HTML editor into the textarea doesn't play well with
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// our AJAX form submission. Manually moving it to trigger
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// on our send button click.
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$scr = <<<END_OF_SCRIPT
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$().ready(function() {
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var noticeForm = $('#form_notice');
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$('textarea#notice_data-text').tinymce({
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script_url : '{$path}',
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// General options
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theme : "advanced",
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plugins : "paste,fullscreen,autoresize,inlinepopups,tabfocus,linkautodetect",
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theme_advanced_buttons1 : "bold,italic,strikethrough,|,undo,redo,|,link,unlink,image,|,fullscreen",
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theme_advanced_buttons2 : "",
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theme_advanced_buttons3 : "",
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add_form_submit_trigger : false,
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theme_advanced_resizing : true,
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tabfocus_elements: ":prev,:next",
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setup: function(ed) {
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noticeForm.append('<input type="hidden" name="richedit" value="1">');
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$('#notice_action-submit').click(function() {
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tinymce.triggerSave();
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});
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var origCounter = SN.U.CharacterCount;
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SN.U.CharacterCount = function(form) {
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var text = $(ed.getDoc()).text();
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return text.length;
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};
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ed.onKeyUp.add(function (ed, e) {
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SN.U.Counter(noticeForm);
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});
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$('#'+SN.C.S.NoticeDataAttach).change(function() {
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var img = '<img src="{$placeholder}" class="placeholder" width="320" height="240">';
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var html = tinyMCE.activeEditor.getContent();
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ed.setContent(html + img);
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});
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}
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});
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});
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END_OF_SCRIPT;
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return $scr;
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}
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/**
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* Does the current user have permission to use the rich-text editor?
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* Always true unless the plugin's "restricted" setting is on, in which
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* case it's limited to users with the "richedit" role.
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*
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* @fixme make that more sanely configurable :)
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*
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* @return boolean
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*/
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private function isAllowedRichEdit()
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{
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if ($this->restricted) {
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$user = common_current_user();
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return !empty($user) && $user->hasRole('richedit');
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} else {
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return true;
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}
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}
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}
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