languages/LanguageConverter.php

   1 <?php
   2 /**
   3   * @package MediaWiki
   4   * @subpackage Language
   5   *
   6   * @author Zhengzhu Feng <zhengzhu@gmail.com>
   7   * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License
   8   */
   9
  10 class LanguageConverter {
  11         var $mPreferredVariant='';
  12         var $mMainLanguageCode;
  13         var $mVariants, $mVariantFallbacks;
  14         var $mTablesLoaded = false;
  15         var $mUseFss = false;
  16         var $mTables;
  17         var $mFssObjects;
  18         var $mTitleDisplay='';
  19         var $mDoTitleConvert=true, $mDoContentConvert=true;
  20         var $mCacheKey;
  21         var $mLangObj;
  22         var $mMarkup;
  23         var $mFlags;
  24         var $mUcfirst = false;
  25         var $mNoTitleConvert = false;
  26         /**
  27      * Constructor
  28          *
  29      * @param string $maincode the main language code of this language
  30      * @param array $variants the supported variants of this language
  31      * @param array $variantfallback the fallback language of each variant
  32      * @param array $markup array defining the markup used for manual conversion
  33          * @param array $flags array defining the custom strings that maps to the flags
  34      * @access public
  35      */
  36         function __construct($langobj, $maincode,
  37                                                                 $variants=array(),
  38                                                                 $variantfallbacks=array(),
  39                                                                 $markup=array(),
  40                                                                 $flags = array()) {
  41                 global $wgDBname;
  42                 global $wgLegalTitleChars;
  43                 $this->mLangObj = $langobj;
  44                 $this->mMainLanguageCode = $maincode;
  45                 $this->mVariants = $variants;
  46                 $this->mVariantFallbacks = $variantfallbacks;
  47                 $this->mCacheKey = $wgDBname . ":conversiontables";
  48                 $m = array('begin'=>'-{', 'flagsep'=>'|', 'codesep'=>':',
  49                                    'varsep'=>';', 'end'=>'}-');
  50                 $this->mMarkup = array_merge($m, $markup);
  51                 $f = array('A'=>'A', 'T'=>'T');
  52                 $this->mFlags = array_merge($f, $flags);
  53                 if ( function_exists( 'fss_prep_replace' ) ) {
  54                         $this->mUseFss = true;
  55                 }
  56         }
  57
  58         /**
  59      * @access public
  60      */
  61         function getVariants() {
  62                 return $this->mVariants;
  63         }
  64
  65         /**
  66          * in case some variant is not defined in the markup, we need
  67          * to have some fallback. for example, in zh, normally people
  68          * will define zh-cn and zh-tw, but less so for zh-sg or zh-hk.
  69          * when zh-sg is preferred but not defined, we will pick zh-cn
  70          * in this case. right now this is only used by zh.
  71          *
  72          * @param string $v the language code of the variant
  73          * @return string the code of the fallback language or false if there is no fallback
  74      * @private
  75         */
  76         function getVariantFallback($v) {
  77                 return $this->mVariantFallbacks[$v];
  78         }
  79
  80
  81         /**
  82          * get preferred language variants.
  83          * @param boolean $fromUser Get it from $wgUser's preferences
  84      * @return string the preferred language code
  85      * @access public
  86         */
  87         function getPreferredVariant( $fromUser = true ) {
  88                 global $wgUser, $wgRequest;
  89
  90                 if($this->mPreferredVariant)
  91                         return $this->mPreferredVariant;
  92
  93                 // see if the preference is set in the request
  94                 $req = $wgRequest->getText( 'variant' );
  95                 if( in_array( $req, $this->mVariants ) ) {
  96                         $this->mPreferredVariant = $req;
  97                         return $req;
  98                 }
  99
 100                 // get language variant preference from logged in users
 101                 // Don't call this on stub objects because that causes infinite
 102                 // recursion during initialisation
 103                 if( $fromUser && $wgUser->isLoggedIn() )  {
 104                         $this->mPreferredVariant = $wgUser->getOption('variant');
 105                         return $this->mPreferredVariant;
 106                 }
 107
 108                 # FIXME rewrite code for parsing http header. The current code
 109                 # is written specific for detecting zh- variants
 110                 if( !$this->mPreferredVariant ) {
 111                         // see if some supported language variant is set in the
 112                         // http header, but we don't set the mPreferredVariant
 113                         // variable in case this is called before the user's
 114                         // preference is loaded
 115                         $pv=$this->mMainLanguageCode;
 116                         if(array_key_exists('HTTP_ACCEPT_LANGUAGE', $_SERVER)) {
 117                                 $header = str_replace( '_', '-', strtolower($_SERVER["HTTP_ACCEPT_LANGUAGE"]));
 118                                 $zh = strstr($header, 'zh-');
 119                                 if($zh) {
 120                                         $pv = substr($zh,0,5);
 121                                 }
 122                         }
 123                         return $pv;
 124                 }
 125         }
 126
 127         /**
 128      * dictionary-based conversion
 129      *
 130      * @param string $text the text to be converted
 131      * @param string $toVariant the target language code
 132      * @return string the converted text
 133      * @private
 134      */
 135         function autoConvert($text, $toVariant=false) {
 136                 $fname="LanguageConverter::autoConvert";
 137
 138                 wfProfileIn( $fname );
 139
 140                 if(!$this->mTablesLoaded)
 141                         $this->loadTables();
 142
 143                 if(!$toVariant)
 144                         $toVariant = $this->getPreferredVariant();
 145                 if(!in_array($toVariant, $this->mVariants))
 146                         return $text;
 147
 148                 /* we convert everything except:
 149                    1. html markups (anything between < and >)
 150                    2. html entities
 151                    3. place holders created by the parser
 152                 */
 153                 global $wgParser;
 154                 if (isset($wgParser))
 155                         $marker = '|' . $wgParser->UniqPrefix() . '[\-a-zA-Z0-9]+';
 156                 else
 157                         $marker = "";
 158
 159                 // this one is needed when the text is inside an html markup
 160                 $htmlfix = '|<[^>]+$|^[^<>]*>';
 161
 162                 // disable convert to variants between <code></code> tags
 163                 $codefix = '<code>.+?<\/code>|';
 164
 165                 $reg = '/'.$codefix.'<[^>]+>|&[a-zA-Z#][a-z0-9]+;' . $marker . $htmlfix . '/s';
 166
 167                 $matches = preg_split($reg, $text, -1, PREG_SPLIT_OFFSET_CAPTURE);
 168
 169                 $m = array_shift($matches);
 170
 171                 $ret = $this->translate($m[0], $toVariant);
 172                 $mstart = $m[1]+strlen($m[0]);
 173                 foreach($matches as $m) {
 174                         $ret .= substr($text, $mstart, $m[1]-$mstart);
 175                         $ret .= $this->translate($m[0], $toVariant);
 176                         $mstart = $m[1] + strlen($m[0]);
 177                 }
 178                 wfProfileOut( $fname );
 179                 return $ret;
 180         }
 181
 182         /**
 183          * Translate a string to a variant
 184          * Doesn't process markup or do any of that other stuff, for that use convert()
 185          *
 186          * @param string $text Text to convert
 187          * @param string $variant Variant language code
 188          * @return string Translated text
 189          */
 190         function translate( $text, $variant ) {
 191                 if( !$this->mTablesLoaded )
 192                         $this->loadTables();
 193                 if ( $this->mUseFss ) {
 194                         return fss_exec_replace( $this->mFssObjects[$variant], $text );
 195                 } else {
 196                         return strtr( $text, $this->mTables[$variant] );
 197                 }
 198         }
 199
 200         /**
 201      * convert text to all supported variants
 202      *
 203      * @param string $text the text to be converted
 204      * @return array of string
 205      * @public
 206      */
 207         function autoConvertToAllVariants($text) {
 208                 $fname="LanguageConverter::autoConvertToAllVariants";
 209                 wfProfileIn( $fname );
 210                 if( !$this->mTablesLoaded )
 211                         $this->loadTables();
 212
 213                 $ret = array();
 214                 foreach($this->mVariants as $variant) {
 215                         $ret[$variant] = $this->translate($text, $variant);
 216                 }
 217
 218                 wfProfileOut( $fname );
 219                 return $ret;
 220         }
 221
 222         /**
 223      * convert link text to all supported variants
 224      *
 225      * @param string $text the text to be converted
 226      * @return array of string
 227      * @public
 228      */
 229         function convertLinkToAllVariants($text) {
 230                 if( !$this->mTablesLoaded )
 231                         $this->loadTables();
 232
 233                 $ret = array();
 234                 $tarray = explode($this->mMarkup['begin'], $text);
 235                 $tfirst = array_shift($tarray);
 236
 237                 foreach($this->mVariants as $variant)
 238                         $ret[$variant] = $this->translate($tfirst,$variant);
 239
 240                 foreach($tarray as $txt) {
 241                         $marked = explode($this->mMarkup['end'], $txt, 2);
 242
 243                         foreach($this->mVariants as $variant){
 244                                 $ret[$variant] .= $this->mMarkup['begin'].$marked[0].$this->mMarkup['end'];
 245                                 if(array_key_exists(1, $marked))
 246                                         $ret[$variant] .= $this->translate($marked[1],$variant);
 247                         }
 248
 249                 }
 250
 251                 return $ret;
 252         }
 253
 254
 255         /**
 256          * Convert text using a parser object for context
 257          */
 258         function parserConvert( $text, &$parser ) {
 259                 global $wgDisableLangConversion;
 260                 /* don't do anything if this is the conversion table */
 261                 if ( $parser->mTitle->getNamespace() == NS_MEDIAWIKI &&
 262                                  strpos($parser->mTitle->getText(), "Conversiontable") !== false )
 263                 {
 264                         return $text;
 265                 }
 266
 267                 if($wgDisableLangConversion)
 268                         return $text;
 269
 270                 $text = $this->convert( $text );
 271                 $parser->mOutput->setTitleText( $this->mTitleDisplay );
 272                 return $text;
 273         }
 274
 275         /**
 276          * convert text to different variants of a language. the automatic
 277          * conversion is done in autoConvert(). here we parse the text
 278          * marked with -{}-, which specifies special conversions of the
 279          * text that can not be accomplished in autoConvert()
 280          *
 281          * syntax of the markup:
 282          * -{code1:text1;code2:text2;...}-  or
 283          * -{text}- in which case no conversion should take place for text
 284      *
 285      * @param string $text text to be converted
 286      * @param bool $isTitle whether this conversion is for the article title
 287      * @return string converted text
 288      * @access public
 289      */
 290         function convert( $text , $isTitle=false) {
 291                 $mw =& MagicWord::get( 'notitleconvert'   );
 292                 if( $mw->matchAndRemove( $text ) )
 293                         $this->mDoTitleConvert = false;
 294
 295                 $mw =& MagicWord::get( 'nocontentconvert'   );
 296                 if( $mw->matchAndRemove( $text ) ) {
 297                         $this->mDoContentConvert = false;
 298                 }
 299
 300                 // no conversion if redirecting
 301                 $mw =& MagicWord::get( 'redirect'   );
 302                 if( $mw->matchStart( $text ))
 303                         return $text;
 304
 305                 if( $isTitle ) {
 306                         if($this->mNoTitleConvert){
 307                                 $this->mTitleDisplay = $text;
 308                                 return $text;
 309                         }
 310
 311                         if( !$this->mDoTitleConvert ) {
 312                                 $this->mTitleDisplay = $text;
 313                                 return $text;
 314                         }
 315
 316                         global $wgRequest;
 317                         $isredir = $wgRequest->getText( 'redirect', 'yes' );
 318                         $action = $wgRequest->getText( 'action' );
 319                         if ( $isredir == 'no' || $action == 'edit' ) {
 320                                 return $text;
 321                         }
 322                         else {
 323                                 $this->mTitleDisplay = $this->convert($text);
 324                                 return $this->mTitleDisplay;
 325                         }
 326                 }
 327
 328                 if( !$this->mDoContentConvert )
 329                         return $text;
 330
 331                 $plang = $this->getPreferredVariant();
 332                 if( isset( $this->mVariantFallbacks[$plang] ) ) {
 333                         $fallback = $this->mVariantFallbacks[$plang];
 334                 } else {
 335                         // This sounds... bad?
 336                         $fallback = '';
 337                 }
 338
 339                 $tarray = explode($this->mMarkup['begin'], $text);
 340                 $tfirst = array_shift($tarray);
 341                 $text = $this->autoConvert($tfirst);
 342                 foreach($tarray as $txt) {
 343                         $marked = explode($this->mMarkup['end'], $txt, 2);
 344                         $flags = array();
 345                         $tt = explode($this->mMarkup['flagsep'], $marked[0], 2);
 346
 347                         if(sizeof($tt) == 2) {
 348                                 $f = explode($this->mMarkup['varsep'], $tt[0]);
 349                                 foreach($f as $ff) {
 350                                         $ff = trim($ff);
 351                                         if(array_key_exists($ff, $this->mFlags) &&
 352                                                 !array_key_exists($this->mFlags[$ff], $flags))
 353                                                 $flags[] = $this->mFlags[$ff];
 354                                 }
 355                                 $rules = $tt[1];
 356                         }
 357                         else
 358                                 $rules = $marked[0];
 359
 360                         //FIXME: may cause trouble here...
 361                         //strip &nbsp; since it interferes with the parsing, plus,
 362                         //all spaces should be stripped in this tag anyway.
 363                         $rules = str_replace('&nbsp;', '', $rules);
 364
 365                         $carray = $this->parseManualRule($rules, $flags);
 366                         $disp = '';
 367                         if(array_key_exists($plang, $carray))
 368                                 $disp = $carray[$plang];
 369                         else if(array_key_exists($fallback, $carray))
 370                                 $disp = $carray[$fallback];
 371                         if($disp) {
 372                                 if(in_array('T',  $flags))
 373                                         $this->mTitleDisplay = $disp;
 374                                 else
 375                                         $text .= $disp;
 376
 377                                 if(in_array('A', $flags)) {
 378                                         /* modify the conversion table for this session*/
 379
 380                                         /* fill in the missing variants, if any,
 381                                             with fallbacks */
 382                                         foreach($this->mVariants as $v) {
 383                                                 if(!array_key_exists($v, $carray)) {
 384                                                         $vf = $this->getVariantFallback($v);
 385                                                         if(array_key_exists($vf, $carray))
 386                                                                 $carray[$v] = $carray[$vf];
 387                                                 }
 388                                         }
 389
 390                                         foreach($this->mVariants as $vfrom) {
 391                                                 if(!array_key_exists($vfrom, $carray))
 392                                                         continue;
 393                                                 foreach($this->mVariants as $vto) {
 394                                                         if($vfrom == $vto)
 395                                                                 continue;
 396                                                         if(!array_key_exists($vto, $carray))
 397                                                                 continue;
 398                                                         $this->mTables[$vto][$carray[$vfrom]] = $carray[$vto];
 399
 400                                                 }
 401                                         }
 402                                         if ( $this->mUseFss ) {
 403                                                 $this->generateFssObjects();
 404                                         }
 405                                 }
 406                         }
 407                         else {
 408                                 $text .= $marked[0];
 409                         }
 410                         if(array_key_exists(1, $marked))
 411                                 $text .= $this->autoConvert($marked[1]);
 412                 }
 413
 414                 return $text;
 415         }
 416
 417         /**
 418          * parse the manually marked conversion rule
 419          * @param string $rule the text of the rule
 420          * @return array of the translation in each variant
 421          * @private
 422          */
 423         function parseManualRule($rules, $flags=array()) {
 424
 425                 $choice = explode($this->mMarkup['varsep'], $rules);
 426                 $carray = array();
 427                 if(sizeof($choice) == 1) {
 428                         /* a single choice */
 429                         foreach($this->mVariants as $v)
 430                                 $carray[$v] = $choice[0];
 431                 }
 432                 else {
 433                         foreach($choice as $c) {
 434                                 $v = explode($this->mMarkup['codesep'], $c);
 435                                 if(sizeof($v) != 2) // syntax error, skip
 436                                         continue;
 437                                 $carray[trim($v[0])] = trim($v[1]);
 438                         }
 439                 }
 440                 return $carray;
 441         }
 442
 443         /**
 444          * if a language supports multiple variants, it is
 445          * possible that non-existing link in one variant
 446          * actually exists in another variant. this function
 447          * tries to find it. See e.g. LanguageZh.php
 448          *
 449          * @param string $link the name of the link
 450          * @param mixed $nt the title object of the link
 451          * @return null the input parameters may be modified upon return
 452      * @access public
 453          */
 454         function findVariantLink( &$link, &$nt ) {
 455                 global $wgDisableLangConversion;
 456                 $pref = $this->getPreferredVariant();
 457                 $ns=0;
 458                 if(is_object($nt))
 459                         $ns = $nt->getNamespace();
 460
 461                 $variants = $this->autoConvertToAllVariants($link);
 462                 if($variants == false) //give up
 463                         return;
 464                 foreach( $variants as $v ) {
 465                         $varnt = Title::newFromText( $v, $ns );
 466                         if( $varnt && $varnt->getArticleID() > 0 ) {
 467                                 $nt = $varnt;
 468                                 if( !$wgDisableLangConversion )
 469                                         $link = $v;
 470                                 break;
 471                         }
 472                 }
 473         }
 474
 475     /**
 476      * returns language specific hash options
 477      *
 478      * @access public
 479      */
 480         function getExtraHashOptions() {
 481                 $variant = $this->getPreferredVariant();
 482                 return '!' . $variant ;
 483         }
 484
 485     /**
 486      * get title text as defined in the body of the article text
 487      *
 488      * @access public
 489      */
 490         function getParsedTitle() {
 491                 return $this->mTitleDisplay;
 492         }
 493
 494         /**
 495      * a write lock to the cache
 496      *
 497      * @private
 498      */
 499         function lockCache() {
 500                 global $wgMemc;
 501                 $success = false;
 502                 for($i=0; $i<30; $i++) {
 503                         if($success = $wgMemc->add($this->mCacheKey . "lock", 1, 10))
 504                                 break;
 505                         sleep(1);
 506                 }
 507                 return $success;
 508         }
 509
 510         /**
 511      * unlock cache
 512      *
 513      * @private
 514      */
 515         function unlockCache() {
 516                 global $wgMemc;
 517                 $wgMemc->delete($this->mCacheKey . "lock");
 518         }
 519
 520
 521         /**
 522      * Load default conversion tables
 523      * This method must be implemented in derived class
 524      *
 525      * @private
 526      */
 527         function loadDefaultTables() {
 528                 $name = get_class($this);
 529                 wfDie("Must implement loadDefaultTables() method in class $name");
 530         }
 531
 532         /**
 533      * load conversion tables either from the cache or the disk
 534      * @private
 535      */
 536         function loadTables($fromcache=true) {
 537                 global $wgMemc;
 538                 if( $this->mTablesLoaded )
 539                         return;
 540                 $this->mTablesLoaded = true;
 541                 if($fromcache) {
 542                         $this->mTables = $wgMemc->get( $this->mCacheKey );
 543                         if( !empty( $this->mTables ) ) //all done
 544                                 return;
 545                 }
 546                 // not in cache, or we need a fresh reload.
 547                 // we will first load the default tables
 548                 // then update them using things in MediaWiki:Zhconversiontable/*
 549                 global $wgMessageCache;
 550                 $this->loadDefaultTables();
 551                 foreach($this->mVariants as $var) {
 552                         $cached = $this->parseCachedTable($var);
 553                         $this->mTables[$var] = array_merge($this->mTables[$var], $cached);
 554                 }
 555
 556                 $this->postLoadTables();
 557
 558                 if($this->lockCache()) {
 559                         $wgMemc->set($this->mCacheKey, $this->mTables, 43200);
 560                         $this->unlockCache();
 561                 }
 562                 if ( $this->mUseFss ) {
 563                         $this->generateFssObjects();
 564                 }
 565         }
 566
 567         /**
 568          * Generate FSS objects. The FSS extension must be available.
 569          */
 570         function generateFssObjects() {
 571                 foreach ( $this->mTables as $variant => $table ) {
 572                         $this->mFssObjects[$variant] = fss_prep_replace( $table );
 573                 }
 574         }
 575
 576     /**
 577      * Hook for post processig after conversion tables are loaded
 578      *
 579      */
 580         function postLoadTables() {}
 581
 582     /**
 583      * Reload the conversion tables
 584      *
 585      * @private
 586      */
 587         function reloadTables() {
 588                 if($this->mTables)
 589                         unset($this->mTables);
 590                 $this->mTablesLoaded = false;
 591                 $this->loadTables(false);
 592         }
 593
 594
 595         /**
 596      * parse the conversion table stored in the cache
 597      *
 598      * the tables should be in blocks of the following form:
 599
 600      *          -{
 601      *                  word => word ;
 602      *                  word => word ;
 603      *                  ...
 604      *          }-
 605      *
 606      *  to make the tables more manageable, subpages are allowed
 607      *  and will be parsed recursively if $recursive=true
 608      *
 609      * @private
 610          */
 611         function parseCachedTable($code, $subpage='', $recursive=true) {
 612                 global $wgMessageCache;
 613                 static $parsed = array();
 614
 615                 if(!is_object($wgMessageCache))
 616                         return array();
 617
 618                 $key = 'Conversiontable/'.$code;
 619                 if($subpage)
 620                         $key .= '/' . $subpage;
 621
 622                 if(array_key_exists($key, $parsed))
 623                         return array();
 624
 625
 626                 $txt = $wgMessageCache->get( $key, true, true, true );
 627
 628                 // get all subpage links of the form
 629                 // [[MediaWiki:conversiontable/zh-xx/...|...]]
 630                 $linkhead = $this->mLangObj->getNsText(NS_MEDIAWIKI) . ':Conversiontable';
 631                 $subs = explode('[[', $txt);
 632                 $sublinks = array();
 633                 foreach( $subs as $sub ) {
 634                         $link = explode(']]', $sub, 2);
 635                         if(count($link) != 2)
 636                                 continue;
 637                         $b = explode('|', $link[0]);
 638                         $b = explode('/', trim($b[0]), 3);
 639                         if(count($b)==3)
 640                                 $sublink = $b[2];
 641                         else
 642                                 $sublink = '';
 643
 644                         if($b[0] == $linkhead && $b[1] == $code) {
 645                                 $sublinks[] = $sublink;
 646                         }
 647                 }
 648
 649
 650                 // parse the mappings in this page
 651                 $blocks = explode($this->mMarkup['begin'], $txt);
 652                 array_shift($blocks);
 653                 $ret = array();
 654                 foreach($blocks as $block) {
 655                         $mappings = explode($this->mMarkup['end'], $block, 2);
 656                         $stripped = str_replace(array("'", '"', '*','#'), '', $mappings[0]);
 657                         $table = explode( ';', $stripped );
 658                         foreach( $table as $t ) {
 659                                 $m = explode( '=>', $t );
 660                                 if( count( $m ) != 2)
 661                                         continue;
 662                                 // trim any trailling comments starting with '//'
 663                                 $tt = explode('//', $m[1], 2);
 664                                 $ret[trim($m[0])] = trim($tt[0]);
 665                         }
 666                 }
 667                 $parsed[$key] = true;
 668
 669
 670                 // recursively parse the subpages
 671                 if($recursive) {
 672                         foreach($sublinks as $link) {
 673                                 $s = $this->parseCachedTable($code, $link, $recursive);
 674                                 $ret = array_merge($ret, $s);
 675                         }
 676                 }
 677
 678                 if ($this->mUcfirst) {
 679                         foreach ($ret as $k => $v) {
 680                                 $ret[Language::ucfirst($k)] = Language::ucfirst($v);
 681                         }
 682                 }
 683                 return $ret;
 684         }
 685
 686         /**
 687          * Enclose a string with the "no conversion" tag. This is used by
 688          * various functions in the Parser
 689          *
 690          * @param string $text text to be tagged for no conversion
 691          * @return string the tagged text
 692         */
 693         function markNoConversion($text, $noParse=false) {
 694                 # don't mark if already marked
 695                 if(strpos($text, $this->mMarkup['begin']) ||
 696                    strpos($text, $this->mMarkup['end']))
 697                         return $text;
 698
 699                 $ret = $this->mMarkup['begin'] . $text . $this->mMarkup['end'];
 700                 return $ret;
 701         }
 702
 703         /**
 704          * convert the sorting key for category links. this should make different
 705          * keys that are variants of each other map to the same key
 706         */
 707         function convertCategoryKey( $key ) {
 708                 return $key;
 709         }
 710         /**
 711      * hook to refresh the cache of conversion tables when
 712      * MediaWiki:conversiontable* is updated
 713      * @private
 714         */
 715         function OnArticleSaveComplete($article, $user, $text, $summary, $isminor, $iswatch, $section) {
 716                 $titleobj = $article->getTitle();
 717                 if($titleobj->getNamespace() == NS_MEDIAWIKI) {
 718             /*
 719                         global $wgContLang; // should be an LanguageZh.
 720                         if(get_class($wgContLang) != 'languagezh')
 721                                 return true;
 722             */
 723                         $title = $titleobj->getDBkey();
 724                         $t = explode('/', $title, 3);
 725                         $c = count($t);
 726                         if( $c > 1 && $t[0] == 'Conversiontable' ) {
 727                                 if(in_array($t[1], $this->mVariants)) {
 728                                         $this->reloadTables();
 729                                 }
 730                         }
 731                 }
 732                 return true;
 733         }
 734
 735         function setNoTitleConvert(){
 736                 $this->mNoTitleConvert = true;
 737         }
 738
 739 }
 740
 741 ?>