Follow up on r42658. Register messages and rebuild MessagesEn.php
[lhc/web/wiklou.git] / languages / LanguageConverter.php
index 8b066fe..dd69e82 100644 (file)
 <?php
+
 /**
-  * @package MediaWiki
 * @subpackage Language
 *
-  * @author Zhengzhu Feng <zhengzhu@gmail.com>
 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License
 */
+ * Contains the LanguageConverter class and ConverterRule class
* @ingroup Language
+ *
+ * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License
* @file
+ */
 
+/**
+ * base class for language convert
+ * @ingroup Language
+ *
+ * @author Zhengzhu Feng <zhengzhu@gmail.com>
+ * @maintainers fdcn <fdcn64@gmail.com>, shinjiman <shinjiman@gmail.com>
+ */
 class LanguageConverter {
        var $mPreferredVariant='';
        var $mMainLanguageCode;
-       var $mVariants, $mVariantFallbacks;
+       var $mVariants, $mVariantFallbacks, $mVariantNames;
        var $mTablesLoaded = false;
        var $mTables;
        var $mTitleDisplay='';
        var $mDoTitleConvert=true, $mDoContentConvert=true;
+       var $mManualLevel; // 'bidirectional' 'unidirectional' 'disable' for each variants
+       var $mTitleFromFlag = false;
        var $mCacheKey;
        var $mLangObj;
        var $mMarkup;
+       var $mFlags;
+       var $mDescCodeSep = ':',$mDescVarSep = ';';
+       var $mUcfirst = false;
+
+       const CACHE_VERSION_KEY = 'VERSION 6';
+
        /**
-     * Constructor
+        * Constructor
         *
-     * @param string $maincode the main language code of this language
-     * @param array $variants the supported variants of this language
-     * @param array $variantfallback the fallback language of each variant
-     * @param array $markup array defining the markup used for manual conversion
-     * @access public
-     */
-       function LanguageConverter($langobj, $maincode, 
-                                                               $variants=array(), 
-                                                               $variantfallbacks=array(), 
-                                                               $markup=array('begin'=>'-{',
-                                                                                         'codesep'=>':',
-                                                                                         'varsep'=>';',
-                                                                                         'end'=>'}-')) {
-               global $wgDBname;
+        * @param string $maincode the main language code of this language
+        * @param array $variants the supported variants of this language
+        * @param array $variantfallback the fallback language of each variant
+        * @param array $markup array defining the markup used for manual conversion
+        * @param array $flags array defining the custom strings that maps to the flags
+        * @param array $manualLevel limit for supported variants
+        * @public
+        */
+       function __construct($langobj, $maincode,
+                                                               $variants=array(),
+                                                               $variantfallbacks=array(),
+                                                               $markup=array(),
+                                                               $flags = array(),
+                                                               $manualLevel = array() ) {
                $this->mLangObj = $langobj;
                $this->mMainLanguageCode = $maincode;
-               $this->mVariants = $variants;           
+               $this->mVariants = $variants;
                $this->mVariantFallbacks = $variantfallbacks;
-               $this->mCacheKey = $wgDBname . ":conversiontables";
-               $this->mMarkup = $markup;
+               global $wgLanguageNames;
+               $this->mVariantNames = $wgLanguageNames;
+               $this->mCacheKey = wfMemcKey( 'conversiontables', $maincode );
+               $m = array(
+                       'begin'=>'-{', 
+                       'flagsep'=>'|',
+                       'unidsep'=>'=>', //for unidirectional conversion
+                       'codesep'=>':',
+                       'varsep'=>';',
+                       'end'=>'}-'
+               );
+               $this->mMarkup = array_merge($m, $markup);
+               $f = array( 
+                       // 'S' show converted text
+                       // '+' add rules for alltext
+                       // 'E' the gave flags is error
+                       // these flags above are reserved for program
+                       'A'=>'A',       // add rule for convert code (all text convert)
+                       'T'=>'T',       // title convert
+                       'R'=>'R',       // raw content
+                       'D'=>'D',       // convert description (subclass implement)
+                       '-'=>'-',       // remove convert (not implement)
+                       'H'=>'H',       // add rule for convert code (but no display in placed code )
+                       'N'=>'N'        // current variant name
+               );
+               $this->mFlags = array_merge($f, $flags);
+               foreach( $this->mVariants as $v)
+                       $this->mManualLevel[$v]=array_key_exists($v,$manualLevel)
+                                                               ?$manualLevel[$v]
+                                                               :'bidirectional';
        }
 
        /**
-     * @access public
-     */
-       function getVariants() { 
+        * @public
+        */
+       function getVariants() {
                return $this->mVariants;
        }
 
        /**
         * in case some variant is not defined in the markup, we need
         * to have some fallback. for example, in zh, normally people
-        * will define zh-cn and zh-tw, but less so for zh-sg or zh-hk.
-        * when zh-sg is preferred but not defined, we will pick zh-cn
+        * will define zh-hans and zh-hant, but less so for zh-sg or zh-hk.
+        * when zh-sg is preferred but not defined, we will pick zh-hans
         * in this case. right now this is only used by zh.
-        *      
+        *
         * @param string $v the language code of the variant
-        * @return string the code of the fallback language or false if there is no fallback
-     * @access private
-       */
-       function getVariantFallback($v) {
-               return $this->mVariantFallbacks[$v];
+        * @return string array the code of the fallback language or false if there is no fallback
+        * @public
+        */
+       function getVariantFallbacks($v) {
+               if( isset( $this->mVariantFallbacks[$v] ) ) {
+                       return $this->mVariantFallbacks[$v];
+               }
+               return $this->mMainLanguageCode;
        }
 
-       
-       /** 
-     * get preferred language variants.
-     * @return string the preferred language code
-     * @access public
-       */
-       function getPreferredVariant() {
-               global $wgUser, $wgRequest;
-               
+       /**
+        * get preferred language variants.
+        * @param boolean $fromUser Get it from $wgUser's preferences
+        * @return string the preferred language code
+        * @public
+        */
+       function getPreferredVariant( $fromUser = true ) {
+               global $wgUser, $wgRequest, $wgVariantArticlePath, $wgDefaultLanguageVariant;
+
                if($this->mPreferredVariant)
                        return $this->mPreferredVariant;
 
+               // figure out user lang without constructing wgLang to avoid infinite recursion
+               if( $fromUser )
+                       $defaultUserLang = $wgUser->getOption( 'language' );
+               else
+                       $defaultUserLang = $this->mMainLanguageCode;
+               $userLang = $wgRequest->getVal( 'uselang', $defaultUserLang );
+               // see if interface language is same as content, if not, prevent conversion
+               if( ! in_array( $userLang, $this->mVariants ) ){ 
+                       $this->mPreferredVariant = $this->mMainLanguageCode; // no conversion
+                       return $this->mPreferredVariant;
+               }
+
                // see if the preference is set in the request
                $req = $wgRequest->getText( 'variant' );
                if( in_array( $req, $this->mVariants ) ) {
@@ -84,77 +143,140 @@ class LanguageConverter {
                        return $req;
                }
 
-               // get language variant preference from logged in users 
-               if(is_object($wgUser) && $wgUser->isLoggedIn() )  {
+               // check the syntax /code/ArticleTitle
+               if($wgVariantArticlePath!=false && isset($_SERVER['SCRIPT_NAME'])){
+                       // Note: SCRIPT_NAME probably won't hold the correct value if PHP is run as CGI
+                       // (it will hold path to php.cgi binary), and might not exist on some very old PHP installations
+                       $scriptBase = basename( $_SERVER['SCRIPT_NAME'] );
+                       if(in_array($scriptBase,$this->mVariants)){
+                               $this->mPreferredVariant = $scriptBase;
+                               return $this->mPreferredVariant;
+                       }
+               }
+
+               // get language variant preference from logged in users
+               // Don't call this on stub objects because that causes infinite 
+               // recursion during initialisation
+               if( $fromUser && $wgUser->isLoggedIn() )  {
                        $this->mPreferredVariant = $wgUser->getOption('variant');
+                       return $this->mPreferredVariant;
+               }
+
+               // see if default variant is globaly set
+               if($wgDefaultLanguageVariant != false  &&  in_array( $wgDefaultLanguageVariant, $this->mVariants )){
+                       $this->mPreferredVariant = $wgDefaultLanguageVariant;
+                       return $this->mPreferredVariant;
                }
 
                # FIXME rewrite code for parsing http header. The current code
                # is written specific for detecting zh- variants
                if( !$this->mPreferredVariant ) {
-                       // see if some zh- variant is set in the http header,
-                       $this->mPreferredVariant=$this->mMainLanguageCode;
+                       // see if some supported language variant is set in the
+                       // http header, but we don't set the mPreferredVariant
+                       // variable in case this is called before the user's
+                       // preference is loaded
+                       $pv=$this->mMainLanguageCode;
                        if(array_key_exists('HTTP_ACCEPT_LANGUAGE', $_SERVER)) {
                                $header = str_replace( '_', '-', strtolower($_SERVER["HTTP_ACCEPT_LANGUAGE"]));
-                               $zh = strstr($header, 'zh-');
+                               $zh = strstr($header, $pv.'-');
                                if($zh) {
-                                       $this->mPreferredVariant = substr($zh,0,5);
+                                       $ary = split("[,;]",$zh);
+                                       $pv = $ary[0];
                                }
                        }
+                       // don't try to return bad variant
+                       if(in_array( $pv, $this->mVariants ))
+                               return $pv;
                }
 
-               return $this->mPreferredVariant;
-       }
+               return $this->mMainLanguageCode;
 
+       }
+       
        /**
-     * dictionary-based conversion
-     *
-     * @param string $text the text to be converted
-     * @param string $toVariant the target language code
-     * @return string the converted text
-     * @access private
-     */
+        * dictionary-based conversion
+        *
+        * @param string $text the text to be converted
+        * @param string $toVariant the target language code
+        * @return string the converted text
+        * @private
+        */
        function autoConvert($text, $toVariant=false) {
                $fname="LanguageConverter::autoConvert";
+
                wfProfileIn( $fname );
 
                if(!$this->mTablesLoaded)
                        $this->loadTables();
 
-               if(!$toVariant) 
+               if(!$toVariant)
                        $toVariant = $this->getPreferredVariant();
                if(!in_array($toVariant, $this->mVariants))
                        return $text;
 
-               $ret = '';
+               /* we convert everything except:
+                  1. html markups (anything between < and >)
+                  2. html entities
+                  3. place holders created by the parser
+               */
+               global $wgParser;
+               if (isset($wgParser) && $wgParser->UniqPrefix()!=''){
+                       $marker = '|' . $wgParser->UniqPrefix() . '[\-a-zA-Z0-9]+';
+               } else
+                       $marker = "";
 
-               $a = explode('<', $text);
-               $a0 = array_shift($a);
-               $ret .= strtr($a0, $this->mTables[$toVariant]);
-               foreach( $a as $aa ) {
-                       $b = explode('>', $aa, 2);
-                       $ret .= '<' . $b[0];
-                       if(sizeof($b) == 2)
-                               $ret .= '>' . strtr($b[1], $this->mTables[$toVariant]);
-               }
+               // this one is needed when the text is inside an html markup
+               $htmlfix = '|<[^>]+$|^[^<>]*>';
+
+               // disable convert to variants between <code></code> tags
+               $codefix = '<code>.+?<\/code>|';
+               // disable convertsion of <script type="text/javascript"> ... </script>
+               $scriptfix = '<script.*?>.*?<\/script>|';
+               // disable conversion of <pre xxxx> ... </pre>
+               $prefix = '<pre.*?>.*?<\/pre>|';
+
+               $reg = '/'.$codefix . $scriptfix . $prefix . '<[^>]+>|&[a-zA-Z#][a-z0-9]+;' . $marker . $htmlfix . '/s';
+
+               $matches = preg_split($reg, $text, -1, PREG_SPLIT_OFFSET_CAPTURE);
 
-#              /* put back the marker if any */
-#              if(!empty($reg)) {
-#                      $reg = '<'.$reg.'>';
-#                      $ret = preg_replace('/'.$reg.'/', '${1}', $ret);
-#              }
-#
+               $m = array_shift($matches);
+
+               $ret = $this->translate($m[0], $toVariant);
+               $mstart = $m[1]+strlen($m[0]);
+               foreach($matches as $m) {
+                       $ret .= substr($text, $mstart, $m[1]-$mstart);
+                       $ret .= $this->translate($m[0], $toVariant);
+                       $mstart = $m[1] + strlen($m[0]);
+               }
                wfProfileOut( $fname );
                return $ret;
        }
-    
+
+       /**
+        * Translate a string to a variant
+        * Doesn't process markup or do any of that other stuff, for that use convert()
+        *
+        * @param string $text Text to convert
+        * @param string $variant Variant language code
+        * @return string Translated text
+        * @private
+        */
+       function translate( $text, $variant ) {
+               wfProfileIn( __METHOD__ );
+               if( !$this->mTablesLoaded )
+                       $this->loadTables();
+               $text = $this->mTables[$variant]->replace( $text );
+               wfProfileOut( __METHOD__ );
+               return $text;
+       }
+
        /**
-     * convert text to all supported variants
-     *
-     * @param string $text the text to be converted
-     * @return array of string
-     * @access private
-     */
+        * convert text to all supported variants
+        *
+        * @param string $text the text to be converted
+        * @return array of string
+        * @public
+        */
        function autoConvertToAllVariants($text) {
                $fname="LanguageConverter::autoConvertToAllVariants";
                wfProfileIn( $fname );
@@ -163,232 +285,271 @@ class LanguageConverter {
 
                $ret = array();
                foreach($this->mVariants as $variant) {
-                       $ret[$variant] = strtr($text, $this->mTables[$variant]);
+                       $ret[$variant] = $this->translate($text, $variant);
                }
+
                wfProfileOut( $fname );
                return $ret;
        }
 
+       /**
+        * convert link text to all supported variants
+        *
+        * @param string $text the text to be converted
+        * @return array of string
+        * @public
+        */
+       function convertLinkToAllVariants($text) {
+               if( !$this->mTablesLoaded )
+                       $this->loadTables();
+
+               $ret = array();
+               $tarray = explode($this->mMarkup['begin'], $text);
+               $tfirst = array_shift($tarray);
+
+               foreach($this->mVariants as $variant)
+                       $ret[$variant] = $this->translate($tfirst,$variant);
+
+               foreach($tarray as $txt) {
+                       $marked = explode($this->mMarkup['end'], $txt, 2);
+
+                       foreach($this->mVariants as $variant){
+                               $ret[$variant] .= $this->mMarkup['begin'].$marked[0].$this->mMarkup['end'];
+                               if(array_key_exists(1, $marked))
+                                       $ret[$variant] .= $this->translate($marked[1],$variant);
+                       }
+                       
+               }
+
+               return $ret;
+       }
+
+
+       /**
+        * apply manual conversion
+        * @private
+        */
+       function applyManualConv($convRule){
+               // use syntax -{T|zh:TitleZh;zh-tw:TitleTw}- for custom conversion in title
+               $title = $convRule->getTitle();
+               if($title){
+                       $this->mTitleFromFlag = true;
+                       $this->mTitleDisplay =  $title;
+               }
+
+               //apply manual conversion table to global table
+               $convTable = $convRule->getConvTable();
+               $action = $convRule->getRulesAction();
+               foreach($convTable as $v=>$t) {
+                       if( !in_array($v,$this->mVariants) )continue;
+                       if( $action=="add" )
+                               $this->mTables[$v]->mergeArray($t);
+                       elseif ( $action=="remove" )
+                               $this->mTables[$v]->removeArray($t);
+               }
+       }
+
+       /**
+        * Convert text using a parser object for context
+        * @public
+        */
+       function parserConvert( $text, &$parser ) {
+               global $wgDisableLangConversion;
+               /* don't do anything if this is the conversion table */
+               if ( $parser->getTitle()->getNamespace() == NS_MEDIAWIKI &&
+                                strpos($parser->mTitle->getText(), "Conversiontable") !== false ) 
+               {
+                       return $text;
+               }
+
+               if($wgDisableLangConversion)
+                       return $text;
+
+               $text = $this->convert( $text );
+               $parser->mOutput->setTitleText( $this->mTitleDisplay );
+               return $text;
+       }
+
+       /**
+        *  convert title
+        * @private
+        */
+       function convertTitle($text){
+               global $wgDisableTitleConversion, $wgUser;
+
+               // check for global param and __NOTC__ tag
+               if( $wgDisableTitleConversion || !$this->mDoTitleConvert || $wgUser->getOption('noconvertlink') == 1 ) {
+                       $this->mTitleDisplay = $text;
+                       return $text;
+               }
+
+               // use the title from the T flag if any
+               if($this->mTitleFromFlag){
+                       $this->mTitleFromFlag = false;
+                       return $this->mTitleDisplay;
+               }
+
+               global $wgRequest;
+               $isredir = $wgRequest->getText( 'redirect', 'yes' );
+               $action = $wgRequest->getText( 'action' );
+               $linkconvert = $wgRequest->getText( 'linkconvert', 'yes' );
+               if ( $isredir == 'no' || $action == 'edit' || $action == 'submit' || $linkconvert == 'no' ) {
+                       return $text;
+               } else {
+                       $this->mTitleDisplay = $this->convert($text);
+                       return $this->mTitleDisplay;
+               }
+       }
+
        /**
         * convert text to different variants of a language. the automatic
-        * conversion is done in autoConvert(). here we parse the text 
-        * marked with -{}-, which specifies special conversions of the 
+        * conversion is done in autoConvert(). here we parse the text
+        * marked with -{}-, which specifies special conversions of the
         * text that can not be accomplished in autoConvert()
         *
         * syntax of the markup:
         * -{code1:text1;code2:text2;...}-  or
+        * -{flags|code1:text1;code2:text2;...}-  or
         * -{text}- in which case no conversion should take place for text
-     *
-     * @param string $text text to be converted
-     * @param bool $isTitle whether this conversion is for the article title 
-     * @return string converted text
-     * @access public
-     */
+        *
+        * @param string $text text to be converted
+        * @param bool $isTitle whether this conversion is for the article title
+        * @return string converted text
+        * @public
+        */
        function convert( $text , $isTitle=false) {
-               global $wgDisableLangConversion;
-               if($wgDisableLangConversion)
-                       return $text; 
 
-               $mw =& MagicWord::get( MAG_NOTITLECONVERT );
+               $mw =& MagicWord::get( 'notitleconvert' );
                if( $mw->matchAndRemove( $text ) )
                        $this->mDoTitleConvert = false;
-
-               $mw =& MagicWord::get( MAG_NOCONTENTCONVERT );
+               $mw =& MagicWord::get( 'nocontentconvert' );
                if( $mw->matchAndRemove( $text ) ) {
                        $this->mDoContentConvert = false;
                }
 
                // no conversion if redirecting
-               $mw =& MagicWord::get( MAG_REDIRECT );
+               $mw =& MagicWord::get( 'redirect' );
                if( $mw->matchStart( $text ))
                        return $text;
 
-               if( $isTitle ) {
-                       if( !$this->mDoTitleConvert ) {
-                               $this->mTitleDisplay = $text;
-                               return $text;
-                       }
-                       if( !empty($this->mTitleDisplay))
-                               return $this->mTitleDisplay;
-
-                       global $wgRequest;
-                       $isredir = $wgRequest->getText( 'redirect', 'yes' );
-                       $action = $wgRequest->getText( 'action' );
-                       if ( $isredir == 'no' || $action == 'edit' ) {
-                               return $text;
-                       }
-                       else {
-                               $this->mTitleDisplay = $this->autoConvert($text);
-                               return $this->mTitleDisplay;
-                       }
-               }
-
-               if( !$this->mDoContentConvert )
-                       return $text;
-
-               $search = array('/('.UNIQ_PREFIX.'-[a-zA-Z0-9]+)/', //nowiki marker
-                                       '/(&[a-z#][a-z0-9]+;)/', //html entities
-                        );
-               $replace = $this->mMarkup['begin'].'${1}'.$this->mMarkup['end'];
-
-               $text = preg_replace($search, $replace, $text);
+               // for title convertion
+               if ($isTitle) return $this->convertTitle($text);
 
                $plang = $this->getPreferredVariant();
-               $fallback = $this->mVariantFallbacks[$plang];
-               $tarray = explode($this->mMarkup['begin'], $text);
-               $tfirst = array_shift($tarray);
-               $text = $this->autoConvert($tfirst);
+               $tarray = StringUtils::explode($this->mMarkup['end'], $text);
+               $text = '';
+               $lastDelim = false;
                foreach($tarray as $txt) {
-                       $marked = explode($this->mMarkup['end'], $txt);
-               
-                       //strip &nbsp; since it interferes with the parsing, plus,
-                       //all spaces should be stripped in this tag anyway.
-                       $marked[0] = str_replace('&nbsp;', '', $marked[0]);
-
-                       /* see if this conversion has special meaning
-                          # for article title:
-                                -{T|zh-cn:foo;zh-tw:bar}-
-                          # convert all occurence of foo/bar in this article:
-                                -{A|zh-cn:foo;zh-tw:bar}-
-                       */
-                       $flag = '';
-                       $choice = false;
-                       $tt = explode("|", $marked[0], 2);
-                       if(sizeof($tt) == 2) {
-                               $flag = trim($tt[0]);
-                               $choice = explode(";", $tt[1]);
-                       }
+                       $marked = explode($this->mMarkup['begin'], $txt, 2);
 
-                       if(!$choice) {
-                               $choice = explode($this->mMarkup['varsep'], $marked[0]);
-                       }
-                       $disp = '';
-                       $carray = array();
-                       if(!array_key_exists(1, $choice)) {
-                               /* a single choice */
-                               $disp = $choice[0];
-
-                               /* fill the carray if the conversion is for the whole article*/
-                               if($flag == 'A') {
-                                       foreach($this->mVariants as $v) {
-                                               $carray[$v] = $disp;
-                                       }
-                               }
-                       } 
-                       else {
-                               foreach($choice as $c) {
-                                       $v = explode($this->mMarkup['codesep'], $c);
-                                       if(sizeof($v) != 2) // syntax error, skip
-                                               continue;
-                                       $carray[trim($v[0])] = trim($v[1]);
-                               }
-                               if(array_key_exists($plang, $carray))
-                                       $disp = $carray[$plang];
-                               else if(array_key_exists($fallback, $carray))
-                                       $disp = $carray[$fallback];
-                       }
-                       if(empty($disp)) { // syntax error
+                       if( $this->mDoContentConvert )
+                               $text .= $this->autoConvert($marked[0],$plang);
+                       else
                                $text .= $marked[0];
+
+                       if(array_key_exists(1, $marked)){
+                               // strip the flags from syntax like -{T| ... }-
+                               $crule = new ConverterRule($marked[1], $this);
+                               $crule->parse($plang);
+
+                               $text .= $crule->getDisplay();
+                               $this->applyManualConv($crule);
+                               $lastDelim = false;
+                       } else {
+                               // Reinsert the }- which wasn't part of anything
+                               $text .= $this->mMarkup['end'];
+                               $lastDelim = true;
                        }
-                       else {  
-                               if($flag == 'T') // for title only
-                                       $this->mTitleDisplay = $disp;
-                               else {
-                                       $text .= $disp;
-                                       if($flag == 'A') {
-                                               /* modify the conversion table for this session*/
-
-                                               /* fill in the missing variants, if any,
-                                                   with fallbacks */ 
-                                               foreach($this->mVariants as $v) {
-                                                       if(!array_key_exists($v, $carray)) {
-                                                               $vf = $this->getVariantFallback($v);
-                                                               if(array_key_exists($vf, $carray))
-                                                                       $carray[$v] = $carray[$vf];
-                                                       }
-                                               }
-                                               foreach($this->mVariants as $vfrom) {
-                                                       if(!array_key_exists($vfrom, $carray))
-                                                               continue;
-                                                       foreach($this->mVariants as $vto) {
-                                                               if($vfrom == $vto)
-                                                                       continue;
-                                                               if(!array_key_exists($vto, $carray))
-                                                                       continue;
-                                                               $this->mTables[$vto][$carray[$vfrom]] = $carray[$vto];
-                                                       }
-                                               }
-                                       }
-                               }
-                       }
-                       if(array_key_exists(1, $marked))
-                               $text .= $this->autoConvert($marked[1]);
                }
-               
+               if ( $lastDelim ) {
+                       // Remove the last delimiter (wasn't real)
+                       $text = substr( $text, 0, -strlen( $this->mMarkup['end'] ) );
+               }
+
                return $text;
        }
 
-
        /**
         * if a language supports multiple variants, it is
         * possible that non-existing link in one variant
-        * actually exists in another variant. this function 
+        * actually exists in another variant. this function
         * tries to find it. See e.g. LanguageZh.php
         *
         * @param string $link the name of the link
         * @param mixed $nt the title object of the link
         * @return null the input parameters may be modified upon return
-     * @access public
+        * @public
         */
-       function findVariantLink( &$link, &$nt ) {
-               static $count=0; //used to limit this operation
-               static $cache=array();
-               global $wgDisableLangConversion;
-               $pref = $this->getPreferredVariant();
-               if( $count > 50 )
+       function findVariantLink( &$link, &$nt, $forTemplate = false ) {
+               global $wgDisableLangConversion, $wgDisableTitleConversion, $wgRequest, $wgUser;
+               $isredir = $wgRequest->getText( 'redirect', 'yes' );
+               $action = $wgRequest->getText( 'action' );
+               $linkconvert = $wgRequest->getText( 'linkconvert', 'yes' );
+               $disableLinkConversion = $wgDisableLangConversion || $wgDisableTitleConversion;
+               $linkBatch = new LinkBatch();
+
+               $ns=NS_MAIN;
+
+               if ( $disableLinkConversion || ( !$forTemplate && ( $isredir == 'no' || $action == 'edit'
+                       || $action == 'submit' || $linkconvert == 'no' || $wgUser->getOption('noconvertlink') == 1 ) ) ) {
                        return;
-               $count++;
+               }
+
+               if(is_object($nt))
+                       $ns = $nt->getNamespace();
+
                $variants = $this->autoConvertToAllVariants($link);
                if($variants == false) //give up
                        return;
+
+               $titles = array();
+
                foreach( $variants as $v ) {
-                       if(isset($cache[$v]))
-                               continue;
-                       $cache[$v] = 1;
-                       $varnt = Title::newFromText( $v );
-                       if( $varnt && $varnt->getArticleID() > 0 ) {
+                       if($v != $link){
+                               $varnt = Title::newFromText( $v, $ns );
+                               if(!is_null($varnt)){
+                                       $linkBatch->addObj($varnt);
+                                       $titles[]=$varnt;
+                               }
+                       }
+               }
+
+               // fetch all variants in single query
+               $linkBatch->execute();
+
+               foreach( $titles as $varnt ) {
+                       if( $varnt->getArticleID() > 0 ) {
                                $nt = $varnt;
-                               if( !$wgDisableLangConversion && $pref != 'zh' )
-                                       $link = $v;
+                               $link = $v;
                                break;
                        }
                }
        }
 
     /**
-     * returns language specific hash options
-     * 
-     * @access public
-     */
+        * returns language specific hash options
+        *
+        * @public
+        */
        function getExtraHashOptions() {
                $variant = $this->getPreferredVariant();
                return '!' . $variant ;
        }
 
     /**
-     * get title text as defined in the body of the article text
-     *
-     * @access public
-     */
+        * get title text as defined in the body of the article text
+        *
+        * @public
+        */
        function getParsedTitle() {
                return $this->mTitleDisplay;
        }
 
        /**
-     * a write lock to the cache
-     *
-     * @access private
-     */
+        * a write lock to the cache
+        *
+        * @private
+        */
        function lockCache() {
                global $wgMemc;
                $success = false;
@@ -397,14 +558,14 @@ class LanguageConverter {
                                break;
                        sleep(1);
                }
-               return $success;                
+               return $success;
        }
 
        /**
-     * unlock cache
-     *
-     * @access private
-     */
+        * unlock cache
+        *
+        * @private
+        */
        function unlockCache() {
                global $wgMemc;
                $wgMemc->delete($this->mCacheKey . "lock");
@@ -412,73 +573,66 @@ class LanguageConverter {
 
 
        /**
-     * Load default conversion tables
-     * This method must be implemented in derived class
-     * 
-     * @access private
-     */
+        * Load default conversion tables
+        * This method must be implemented in derived class
+        *
+        * @private
+        */
        function loadDefaultTables() {
                $name = get_class($this);
-               die("Must implement loadDefaultTables() method in class $name");
+               wfDie("Must implement loadDefaultTables() method in class $name");
        }
 
        /**
-     * load conversion tables either from the cache or the disk
-     * @access private
-     */
+        * load conversion tables either from the cache or the disk
+        * @private
+        */
        function loadTables($fromcache=true) {
                global $wgMemc;
                if( $this->mTablesLoaded )
                        return;
+               wfProfileIn( __METHOD__ );
                $this->mTablesLoaded = true;
+               $this->mTables = false;
                if($fromcache) {
+                       wfProfileIn( __METHOD__.'-cache' );
                        $this->mTables = $wgMemc->get( $this->mCacheKey );
-                       if( !empty( $this->mTables ) ) //all done
-                               return;
-               }
-               // not in cache, or we need a fresh reload. 
-               // we will first load the default tables
-               // then update them using things in MediaWiki:Zhconversiontable/*
-               global $wgMessageCache;
-               $this->loadDefaultTables();
-               foreach($this->mVariants as $var) {
-                       $cached = $this->parseCachedTable($var);
-                       $this->mTables[$var] = array_merge($this->mTables[$var], $cached);
+                       wfProfileOut( __METHOD__.'-cache' );
                }
+               if ( !$this->mTables || !isset( $this->mTables[self::CACHE_VERSION_KEY] ) ) {
+                       wfProfileIn( __METHOD__.'-recache' );
+                       // not in cache, or we need a fresh reload.
+                       // we will first load the default tables
+                       // then update them using things in MediaWiki:Zhconversiontable/*
+                       $this->loadDefaultTables();
+                       foreach($this->mVariants as $var) {
+                               $cached = $this->parseCachedTable($var);
+                               $this->mTables[$var]->mergeArray($cached);
+                       }
 
-               $this->postLoadTables();
-               
-               if($this->lockCache()) {
-                       $wgMemc->set($this->mCacheKey, $this->mTables, 43200);
-                       $this->unlockCache();
+                       $this->postLoadTables();
+                       $this->mTables[self::CACHE_VERSION_KEY] = true;
+
+                       if($this->lockCache()) {
+                               $wgMemc->set($this->mCacheKey, $this->mTables, 43200);
+                               $this->unlockCache();
+                       }
+                       wfProfileOut( __METHOD__.'-recache' );
                }
+               wfProfileOut( __METHOD__ );
        }
-       
+
     /**
-     * Hook for post processig after conversion tables are loaded
-     *
-     */
+        * Hook for post processig after conversion tables are loaded
+        *
+        */
        function postLoadTables() {}
 
-       /* deprecated? */
-       function updateTablexxxx($code, $table) {
-               global $wgMemc;
-               if(!$this->mTablesLoaded)
-                       $this->loadTables();
-
-               $this->mTables[$code] = array_merge($this->mTables[$code], $table);
-               if($this->lockCache()) {
-                       $wgMemc->delete($this->mCacheKey);
-                       $wgMemc->set($this->mCacheKey, $this->mTables, 43200);
-                       $this->unlockCache();
-               }
-       }
-
     /**
-     * Reload the conversion tables
-     * 
-     * @access private
-     */
+        * Reload the conversion tables
+        *
+        * @private
+        */
        function reloadTables() {
                if($this->mTables)
                        unset($this->mTables);
@@ -488,20 +642,18 @@ class LanguageConverter {
 
 
        /**
-     * parse the conversion table stored in the cache 
-     *
-     * the tables should be in blocks of the following form:
-
-     *         -{
-     *                 word => word ;
-     *                 word => word ;
-     *                 ...
-     *         }-
-     * 
-     * to make the tables more manageable, subpages are allowed
-     * and will be parsed recursively if $recursive=true
-     *
-     * @access private
+        * parse the conversion table stored in the cache
+        *
+        * the tables should be in blocks of the following form:
+        *              -{
+        *                      word => word ;
+        *                      word => word ;
+        *                      ...
+        *              }-
+        *
+        *      to make the tables more manageable, subpages are allowed
+        *      and will be parsed recursively if $recursive=true
+        *
         */
        function parseCachedTable($code, $subpage='', $recursive=true) {
                global $wgMessageCache;
@@ -516,9 +668,18 @@ class LanguageConverter {
 
                if(array_key_exists($key, $parsed))
                        return array();
-       
 
-               $txt = $wgMessageCache->get( $key, true, true, true );
+               if ( strpos( $code, '/' ) === false ) {
+                       $txt = $wgMessageCache->get( 'Conversiontable', true, $code );
+               } else {
+                       $title = Title::makeTitleSafe( NS_MEDIAWIKI, "Conversiontable/$code" );
+                       if ( $title && $title->exists() ) {
+                               $article = new Article( $title );
+                               $txt = $article->getContents();
+                       } else {
+                               $txt = '';
+                       }
+               }
 
                // get all subpage links of the form
                // [[MediaWiki:conversiontable/zh-xx/...|...]]
@@ -533,7 +694,7 @@ class LanguageConverter {
                        $b = explode('/', trim($b[0]), 3);
                        if(count($b)==3)
                                $sublink = $b[2];
-                       else    
+                       else
                                $sublink = '';
 
                        if($b[0] == $linkhead && $b[1] == $code) {
@@ -543,11 +704,11 @@ class LanguageConverter {
 
 
                // parse the mappings in this page
-               $blocks = explode('-{', $txt);
+               $blocks = explode($this->mMarkup['begin'], $txt);
                array_shift($blocks);
-               $ret = array(); 
+               $ret = array();
                foreach($blocks as $block) {
-                       $mappings = explode('}-', $block, 2);
+                       $mappings = explode($this->mMarkup['end'], $block, 2);
                        $stripped = str_replace(array("'", '"', '*','#'), '', $mappings[0]);
                        $table = explode( ';', $stripped );
                        foreach( $table as $t ) {
@@ -569,33 +730,48 @@ class LanguageConverter {
                                $ret = array_merge($ret, $s);
                        }
                }
+
+               if ($this->mUcfirst) {
+                       foreach ($ret as $k => $v) {
+                               $ret[Language::ucfirst($k)] = Language::ucfirst($v);
+                       }
+               }
                return $ret;
        }
 
        /**
         * Enclose a string with the "no conversion" tag. This is used by
         * various functions in the Parser
-        * 
+        *
         * @param string $text text to be tagged for no conversion
         * @return string the tagged text
-       */
-       function markNoConversion($text) {
-               $ret = $this->mMarkup['begin'] . $text . $this->mMarkup['end'];
+        * @public
+        */
+       function markNoConversion($text, $noParse=false) {
+               # don't mark if already marked
+               if(strpos($text, $this->mMarkup['begin']) ||
+                  strpos($text, $this->mMarkup['end']))
+                       return $text;
+
+               $ret = $this->mMarkup['begin'] .'R|'. $text . $this->mMarkup['end'];
+               return $ret;
        }
 
        /**
-     * hook to refresh the cache of conversion tables when 
-     * MediaWiki:conversiontable* is updated
-     * @access private
-       */
-       function OnArticleSaveComplete($article, $user, $text, $summary, $isminor, $iswatch, $section) {
+        * convert the sorting key for category links. this should make different
+        * keys that are variants of each other map to the same key
+        */
+       function convertCategoryKey( $key ) {
+               return $key;
+       }
+       /**
+        * hook to refresh the cache of conversion tables when
+        * MediaWiki:conversiontable* is updated
+        * @private
+        */
+       function OnArticleSaveComplete($article, $user, $text, $summary, $isminor, $iswatch, $section, $flags, $revision) {
                $titleobj = $article->getTitle();
-               if($titleobj->getNamespace() == NS_MEDIAWIKI) { 
-            /*
-                       global $wgContLang; // should be an LanguageZh.
-                       if(get_class($wgContLang) != 'languagezh')      
-                               return true;
-            */
+               if($titleobj->getNamespace() == NS_MEDIAWIKI) {
                        $title = $titleobj->getDBkey();
                        $t = explode('/', $title, 3);
                        $c = count($t);
@@ -607,6 +783,381 @@ class LanguageConverter {
                }
                return true;
        }
+
+       /** 
+        * Armour rendered math against conversion
+        * Wrap math into rawoutput -{R| math }- syntax
+        * @public
+        */
+       function armourMath($text){ 
+               $ret = $this->mMarkup['begin'] . 'R|' . $text . $this->mMarkup['end'];
+               return $ret;
+       }
 }
 
-?>
+/**
+ * parser for rules of language conversion , parse rules in -{ }- tag
+ * @ingroup Language
+ * @author  fdcn <fdcn64@gmail.com>
+ */
+class ConverterRule {
+       var $mText; // original text in -{text}-
+       var $mConverter; // LanguageConverter object 
+       var $mManualCodeError='<strong class="error">code error!</strong>';
+       var $mRuleDisplay = '',$mRuleTitle=false;
+       var $mRules = '';// string : the text of the rules
+       var $mRulesAction = 'none';
+       var $mFlags = array();
+       var $mConvTable = array();
+       var $mBidtable = array();// array of the translation in each variant
+       var $mUnidtable = array();// array of the translation in each variant
+
+       /**
+        * Constructor
+        *
+        * @param string $text the text between -{ and }-
+        * @param object $converter a  LanguageConverter object 
+        * @access public
+        */
+       function __construct($text,$converter){
+               $this->mText = $text;
+               $this->mConverter=$converter;
+               foreach($converter->mVariants as $v){
+                       $this->mConvTable[$v]=array();
+               }
+       }
+
+       /**
+        * check if variants array in convert array
+        *
+        * @param string $variant Variant language code
+        * @return string Translated text
+        * @public
+        */
+       function getTextInBidtable($variants){
+               if(is_string($variants)){ $variants=array($variants); }
+               if(!is_array($variants)) return false;
+               foreach ($variants as $variant){
+                       if(array_key_exists($variant, $this->mBidtable)){
+                               return $this->mBidtable[$variant];
+                       }
+               }
+               return false;
+       }
+       
+       /**
+        * Parse flags with syntax -{FLAG| ... }-
+        * @private
+        */
+       function parseFlags(){
+               $text = $this->mText;
+               if(strlen($text) < 2 ) {
+                       $this->mFlags = array( 'R' );
+                       $this->mRules = $text;
+                       return;
+               }
+
+               $flags = array();
+               $markup = $this->mConverter->mMarkup;
+               $validFlags = $this->mConverter->mFlags;
+
+               $tt = explode($markup['flagsep'], $text, 2);
+               if(count($tt) == 2) {
+                       $f = explode($markup['varsep'], $tt[0]);
+                       foreach($f as $ff) {
+                               $ff = trim($ff);
+                               if(array_key_exists($ff, $validFlags) &&
+                                                       !in_array($validFlags[$ff], $flags))
+                                       $flags[] = $validFlags[$ff];
+                       }
+                       $rules = $tt[1];
+               } else {
+                       $rules = $text;
+               }
+
+               //check flags
+               if( in_array('R',$flags) ){
+                       $flags = array('R');// remove other flags
+               } elseif ( in_array('N',$flags) ){
+                       $flags = array('N');// remove other flags
+               } elseif ( in_array('-',$flags) ){
+                       $flags = array('-');// remove other flags
+               } elseif (count($flags)==1 && $flags[0]=='T'){
+                       $flags[]='H'; 
+               } elseif ( in_array('H',$flags) ){
+                       // replace A flag, and remove other flags except T
+                       $temp=array('+','H');
+                       if(in_array('T',$flags)) $temp[] = 'T';
+                       if(in_array('D',$flags)) $temp[] = 'D';
+                       $flags = $temp;
+               } else {
+                       if ( in_array('A',$flags)) {
+                               $flags[]='+';
+                               $flags[]='S';
+                       }
+                       if ( in_array('D',$flags) )
+                               $flags=array_diff($flags,array('S'));
+               }
+               if ( count($flags)==0 )
+                       $flags = array('S');
+               $this->mRules=$rules;
+               $this->mFlags=$flags;
+       }
+       
+       /**
+        * generate conversion table
+        * @private
+        */
+       function parseRules() {
+               $rules = $this->mRules;
+               $flags = $this->mFlags;
+               $bidtable = array();
+               $unidtable = array();
+               $markup = $this->mConverter->mMarkup;
+
+               $choice = explode($markup['varsep'], $rules );
+               foreach($choice as $c) {
+                       $v = explode($markup['codesep'], $c);
+                       if(count($v) != 2) 
+                               continue;// syntax error, skip
+                       $to=trim($v[1]);
+                       $v=trim($v[0]);
+                       $u = explode($markup['unidsep'], $v);
+                       if(count($u) == 1) {
+                               $bidtable[$v] = $to;
+                       } else if(count($u) == 2){
+                               $from=trim($u[0]);$v=trim($u[1]);
+                               if( array_key_exists($v,$unidtable) && !is_array($unidtable[$v]) )
+                                       $unidtable[$v]=array($from=>$to);
+                               else
+                                       $unidtable[$v][$from]=$to;
+                       }
+                       // syntax error, pass
+                       if (!array_key_exists($v,$this->mConverter->mVariantNames)){
+                               $bidtable = array();
+                               $unidtable = array();
+                               break;
+                       }
+               }
+               $this->mBidtable = $bidtable;
+               $this->mUnidtable = $unidtable;
+       }
+
+       /**
+        * @private
+        */
+       function getRulesDesc(){
+               $codesep = $this->mConverter->mDescCodeSep;
+               $varsep = $this->mConverter->mDescVarSep;
+               $text='';
+               foreach($this->mBidtable as $k => $v)
+                       $text .= $this->mConverter->mVariantNames[$k]."$codesep$v$varsep";
+               foreach($this->mUnidtable as $k => $a)
+                       foreach($a as $from=>$to)
+                               $text.=$from.'⇒'.$this->mConverter->mVariantNames[$k]."$codesep$to$varsep";
+               return $text;
+       }
+
+       /**
+        *  Parse rules conversion
+        * @private
+        */
+       function getRuleConvertedStr($variant,$doConvert){
+               $bidtable = $this->mBidtable;
+               $unidtable = $this->mUnidtable;
+
+               if( count($bidtable) + count($unidtable) == 0 ){
+                       return $this->mRules;
+               } elseif ($doConvert){// the text converted 
+                       // display current variant in bidirectional array
+                       $disp = $this->getTextInBidtable($variant);
+                       // or display current variant in fallbacks
+                       if(!$disp)
+                               $disp = $this->getTextInBidtable(
+                                               $this->mConverter->getVariantFallbacks($variant));
+                       // or display current variant in unidirectional array
+                       if(!$disp && array_key_exists($variant,$unidtable)){
+                               $disp = array_values($unidtable[$variant]);
+                               $disp = $disp[0];
+                       }
+                       // or display frist text under disable manual convert
+                       if(!$disp && $this->mConverter->mManualLevel[$variant]=='disable') {
+                               if(count($bidtable)>0){
+                                       $disp = array_values($bidtable);
+                                       $disp = $disp[0];
+                               } else {
+                                       $disp = array_values($unidtable);
+                                       $disp = array_values($disp[0]);
+                                       $disp = $disp[0];
+                               }
+                       }
+                       return $disp;
+               } else {// no convert
+                       return $this->mRules;
+               }
+       }
+
+       /**
+        * generate conversion table for all text
+        * @private
+        */
+       function generateConvTable(){
+               $flags = $this->mFlags;
+               $bidtable = $this->mBidtable;
+               $unidtable = $this->mUnidtable;
+               $manLevel = $this->mConverter->mManualLevel;
+
+               $vmarked=array();
+               foreach($this->mConverter->mVariants as $v) {
+                       /* for bidirectional array
+                               fill in the missing variants, if any,
+                               with fallbacks */
+                       if(!array_key_exists($v, $bidtable)) {
+                               $variantFallbacks = $this->mConverter->getVariantFallbacks($v);
+                               $vf = $this->getTextInBidtable($variantFallbacks);
+                               if($vf) $bidtable[$v] = $vf;
+                       }
+
+                       if(array_key_exists($v,$bidtable)){
+                               foreach($vmarked as $vo){
+                                       // use syntax: -{A|zh:WordZh;zh-tw:WordTw}- 
+                                       // or -{H|zh:WordZh;zh-tw:WordTw}- or -{-|zh:WordZh;zh-tw:WordTw}-
+                                       // to introduce a custom mapping between
+                                       // words WordZh and WordTw in the whole text 
+                                       if($manLevel[$v]=='bidirectional'){
+                                               $this->mConvTable[$v][$bidtable[$vo]]=$bidtable[$v];
+                                       }
+                                       if($manLevel[$vo]=='bidirectional'){
+                                               $this->mConvTable[$vo][$bidtable[$v]]=$bidtable[$vo];
+                                       }
+                               }
+                               $vmarked[]=$v;
+                       }
+                       /*for unidirectional array
+                               fill to convert tables */
+                       $allow_unid = $manLevel[$v]=='bidirectional' 
+                                       || $manLevel[$v]=='unidirectional';
+                       if($allow_unid && array_key_exists($v,$unidtable)){
+                               $ct=$this->mConvTable[$v];
+                               $this->mConvTable[$v] = array_merge($ct,$unidtable[$v]);
+                       }
+               }
+       }
+
+       /**
+        * Parse rules and flags
+        * @public
+        */
+       function parse($variant){
+               if(!$variant) $variant = $this->mConverter->getPreferredVariant();
+
+               $this->parseFlags();
+               $flags = $this->mFlags;
+
+               if( !in_array('R',$flags) || !in_array('N',$flags) ){
+                       //FIXME: may cause trouble here...
+                       //strip &nbsp; since it interferes with the parsing, plus,
+                       //all spaces should be stripped in this tag anyway.
+                       $this->mRules = str_replace('&nbsp;', '', $this->mRules);
+                       // decode => HTML entities modified by Sanitizer::removeHTMLtags 
+                       $this->mRules = str_replace('=&gt;','=>',$this->mRules);
+
+                       $this->parseRules();
+               }
+               $rules = $this->mRules;
+
+               if(count($this->mBidtable)==0 && count($this->mUnidtable)==0){
+                       if(in_array('+',$flags) || in_array('-',$flags))
+                               // fill all variants if text in -{A/H/-|text} without rules
+                               foreach($this->mConverter->mVariants as $v)
+                                       $this->mBidtable[$v] = $rules;
+                       elseif (!in_array('N',$flags) && !in_array('T',$flags) )
+                               $this->mFlags = $flags = array('R');
+               }
+
+               if( in_array('R',$flags) ) {
+                       // if we don't do content convert, still strip the -{}- tags
+                       $this->mRuleDisplay = $rules;
+               } elseif ( in_array('N',$flags) ){
+                       // proces N flag: output current variant name
+                       $this->mRuleDisplay = $this->mConverter->mVariantNames[trim($rules)];
+               } elseif ( in_array('D',$flags) ){
+                       // proces D flag: output rules description
+                       $this->mRuleDisplay = $this->getRulesDesc();
+               } elseif ( in_array('H',$flags) || in_array('-',$flags) ) {
+                       // proces H,- flag or T only: output nothing
+                       $this->mRuleDisplay = '';
+               } elseif ( in_array('S',$flags) ){
+                       $this->mRuleDisplay = $this->getRuleConvertedStr($variant,
+                                                       $this->mConverter->mDoContentConvert);
+               } else {
+                       $this->mRuleDisplay= $this->mManualCodeError;
+               }
+               // proces T flag
+               if ( in_array('T',$flags) ) {
+                       $this->mRuleTitle = $this->getRuleConvertedStr($variant,
+                                                       $this->mConverter->mDoTitleConvert);
+               }
+
+               if (in_array('-', $flags))
+                       $this->mRulesAction='remove';
+               if (in_array('+', $flags))
+                       $this->mRulesAction='add';
+               
+               $this->generateConvTable();
+       }
+       
+       /**
+        * @public
+        */
+       function hasRules(){
+               // TODO:
+       }
+
+       /**
+        * get display text on markup -{...}-
+        * @public
+        */
+       function getDisplay(){
+               return $this->mRuleDisplay;
+       }
+       /**
+        * get converted title
+        * @public
+        */
+       function getTitle(){
+               return $this->mRuleTitle;
+       }
+
+       /**
+        * return how deal with conversion rules
+        * @public
+        */
+       function getRulesAction(){
+               return $this->mRulesAction;
+       }
+
+       /**
+        * get conversion table ( bidirectional and unidirectional conversion table )
+        * @public
+        */
+       function getConvTable(){
+               return $this->mConvTable;
+       }
+
+       /**
+        * get conversion rules string
+        * @public
+        */
+       function getRules(){
+               return $this->mRules;
+       }
+
+       /**
+        * get conversion flags
+        * @public
+        */
+       function getFlags(){
+               return $this->mFlags;
+       }
+}