forked from GNUsocial/gnu-social
Initial version of everplay's RTL direction detector plugin, sets initial direction correctly for primarily RTL notices within an LTR site layout.
This commit is contained in:
Brion Vibber
parent
a5cfc3954f
commit
13e8214a67
230
plugins/DirectionDetector/DirectionDetectorPlugin.php
Normal file
230
plugins/DirectionDetector/DirectionDetectorPlugin.php
Normal file
@ -0,0 +1,230 @@
|
||||
<?php
|
||||
|
||||
/**
|
||||
* DirectionDetector plugin, detects notices with RTL content & sets RTL
|
||||
* style for them.
|
||||
*
|
||||
* This program is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU 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 General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
* @category Plugin
|
||||
* @package StatusNet
|
||||
* @author Behrooz shabani (everplays) - <behrooz@rock.com>
|
||||
* @copyright 2009-2010 Behrooz shabani
|
||||
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
|
||||
*
|
||||
*/
|
||||
|
||||
if (!defined('STATUSNET')) {
|
||||
exit(1);
|
||||
}
|
||||
|
||||
define('DIRECTIONDETECTORPLUGIN_VERSION', '0.1.1');
|
||||
|
||||
class DirectionDetectorPlugin extends Plugin {
|
||||
/**
|
||||
* SN plugin API, here we will make changes on rendered column
|
||||
*
|
||||
* @param object $notice notice is going to be saved
|
||||
*/
|
||||
public function onStartNoticeSave(&$notice){
|
||||
if(self::isRTL($notice->content))
|
||||
$notice->rendered = '<span class="rtl">'.$notice->rendered.'</span>';
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* SN plugin API, here we will add css needed for modifiyed rendered
|
||||
*
|
||||
* @param
|
||||
*/
|
||||
public function onEndShowStatusNetStyles(&$xml){
|
||||
$xml->element('style', array('type' => 'text/css'), 'span.rtl {display:block;direction:rtl;text-align:right;float:right;width:490px;} .notice .author {float:left}');
|
||||
}
|
||||
/**
|
||||
* checks that passed string is a RTL language or not
|
||||
*
|
||||
* @param string $str string to be checked
|
||||
*/
|
||||
public static function isRTL($str){
|
||||
self::getClearText($str);
|
||||
if( is_array($cc = self::utf8ToUnicode(mb_substr($str, 0, 1, 'utf-8'))) )
|
||||
$cc = $cc[0];
|
||||
else
|
||||
return false;
|
||||
if($cc>=1536 && $cc<=1791) // arabic, persian, urdu, kurdish, ...
|
||||
return true;
|
||||
if($cc>=65136 && $cc<=65279) // arabic peresent 2
|
||||
return true;
|
||||
if($cc>=64336 && $cc<=65023) // arabic peresent 1
|
||||
return true;
|
||||
if($cc>=1424 && $cc<=1535) // hebrew
|
||||
return true;
|
||||
if($cc>=64256 && $cc<=64335) // hebrew peresent
|
||||
return true;
|
||||
if($cc>=1792 && $cc<=1871) // Syriac
|
||||
return true;
|
||||
if($cc>=1920 && $cc<=1983) // Thaana
|
||||
return true;
|
||||
if($cc>=1984 && $cc<=2047) // NKo
|
||||
return true;
|
||||
if($cc>=11568 && $cc<=11647) // Tifinagh
|
||||
return true;
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* clears text from replys, tags, groups, reteets & whitespaces
|
||||
*
|
||||
* @param string &$str string to be cleared
|
||||
*/
|
||||
private static function getClearText(&$str){
|
||||
$str = preg_replace('/@[^ ]+|![^ ]+|#[^ ]+/u', '', $str); // reply, tag, group
|
||||
$str = preg_replace('/^RT[: ]{1}| RT | RT: |^RD[: ]{1}| RD | RD: |[♺♻:]/u', '', $str); // redent, retweet
|
||||
$str = preg_replace("/[ \r\t\n]+/", ' ', trim($str)); // remove spaces
|
||||
}
|
||||
|
||||
/**
|
||||
* Takes an UTF-8 string and returns an array of ints representing the
|
||||
* Unicode characters. Astral planes are supported ie. the ints in the
|
||||
* output can be > 0xFFFF. O$ccurrances of the BOM are ignored. Surrogates
|
||||
* are not allowed. ### modified ### returns first character code
|
||||
*
|
||||
* Returns false if the input string isn't a valid UTF-8 octet sequence.
|
||||
*/
|
||||
private static function utf8ToUnicode(&$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
|
||||
$out = array();
|
||||
$len = strlen($str);
|
||||
|
||||
for($i = 0; $i < $len; $i++) {
|
||||
$in = ord($str{$i});
|
||||
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.
|
||||
$out[] = $in;
|
||||
$mBytes = 1;
|
||||
} elseif (0xC0 == (0xE0 & ($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;
|
||||
$mBytes = 6;
|
||||
} else {
|
||||
/* Current octet is neither in the US-ASCII range nor a legal first
|
||||
* octet of a multi-octet sequence.
|
||||
*/
|
||||
return false;
|
||||
}
|
||||
} else {
|
||||
// When mState is non-zero, we expect a continuation of the multi-octet
|
||||
// sequence
|
||||
if (0x80 == (0xC0 & ($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 < $mBytes) ||
|
||||
// From Unicode 3.2, surrogate characters are illegal
|
||||
(($mUcs4 & 0xFFFFF800) == 0xD800) ||
|
||||
// Codepoints outside the Unicode range are illegal
|
||||
($mUcs4 > 0x10FFFF)
|
||||
){
|
||||
return false;
|
||||
}
|
||||
if (0xFEFF != $mUcs4) {
|
||||
$out[] = $mUcs4;
|
||||
}
|
||||
//initialize UTF8 cache
|
||||
$mState = 0;
|
||||
$mUcs4 = 0;
|
||||
$mBytes = 1;
|
||||
}
|
||||
} else {
|
||||
/* ((0xC0 & (*in) != 0x80) && (mState != 0))
|
||||
*
|
||||
* Incomplete multi-octet sequence.
|
||||
*/
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
return $out;
|
||||
}
|
||||
|
||||
/**
|
||||
* plugin details
|
||||
*/
|
||||
function onPluginVersion(&$versions){
|
||||
$versions[] = array(
|
||||
'name' => 'Direction detector',
|
||||
'version' => DIRECTIONDETECTORPLUGIN_VERSION,
|
||||
'author' => 'behrooz shabani',
|
||||
'rawdescription' => _m('shows notices with right-to-left content in correct direction.')
|
||||
);
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
// Example:
|
||||
var_dump(DirectionDetectorPlugin::isRTL('RT @everplays ♺: دادگاه به دليل عدم حضور وکلای متهمان بنا بر اصل ١٣٥ قانون اساسی غير قانونی است')); // true
|
||||
*/
|
||||
Loading…
Reference in New Issue
Block a user