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