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| -rw-r--r-- | plugins/DirectionDetector/DirectionDetectorPlugin.php | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/plugins/DirectionDetector/DirectionDetectorPlugin.php b/plugins/DirectionDetector/DirectionDetectorPlugin.php new file mode 100644 index 000000000..303e60d5f --- /dev/null +++ b/plugins/DirectionDetector/DirectionDetectorPlugin.php @@ -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 +*/ |