. * * @category Plugin * @package StatusNet * @author Behrooz shabani (everplays) - * @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', '0.2.0'); 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 $notice) { if(!preg_match('//', $notice->rendered) && self::isRTL($notice->content)) $notice->rendered = ''.$notice->rendered.''; return true; } /** * is passed string a rtl content or not * * @param string $content * @return boolean */ public static function isRTL($content) { $content = self::getClearText($content); $words = explode(' ', $content); $rtl = 0; foreach($words as $str) if(self::startsWithRTLCharacter($str)) $rtl++; else $rtl--; if($rtl>0)// if number of rtl words is more than ltr words so it's a rtl content return true; elseif($rtl==0) // check first word again return self::startsWithRTLCharacter($words[0]); return false; } /** * checks that passed string starts with a RTL language or not * * @param string $str * @return boolean */ public static function startsWithRTLCharacter($str ){ if (strlen($str) < 1) { return false; } if( is_array($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 $str * @return string */ private static function getClearText($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 return $str; } /** * adds javascript to do same thing on input textarea * * @param Action $action */ function onEndShowScripts(Action $action){ if (common_logged_in()) { $action->script($this->path('jquery.DirectionDetector.js')); } } /** * 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. * * @param string $str * @return mixed array of ints, or false on invalid input */ private static function utf8ToUnicode($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 $out; } /** * plugin details */ function onPluginVersion(array &$versions){ $url = 'http://status.net/wiki/Plugin:DirectionDetector'; $versions[] = array( 'name' => 'Direction detector', 'version' => DIRECTIONDETECTORPLUGIN_VERSION, 'author' => 'Behrooz Shabani', 'homepage' => $url, // TRANS: Plugin description. '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 */