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                 // check the syntax /code/ArticleTitle
 100                 $script = $_SERVER['SCRIPT_NAME'];
 101                 $variants = implode('|',$this->mVariants);
 102                 if(preg_match("/($variants)$/",$script,$matches)){
 103                         $this->mPreferredVariant = $matches[1];
 104                         return $this->mPreferredVariant;
 105                 }
 106
 107                 // get language variant preference from logged in users
 108                 // Don't call this on stub objects because that causes infinite
 109                 // recursion during initialisation
 110                 if( $fromUser && $wgUser->isLoggedIn() )  {
 111                         $this->mPreferredVariant = $wgUser->getOption('variant');
 112                         return $this->mPreferredVariant;
 113                 }
 114
 115                 # FIXME rewrite code for parsing http header. The current code
 116                 # is written specific for detecting zh- variants
 117                 if( !$this->mPreferredVariant ) {
 118                         // see if some supported language variant is set in the
 119                         // http header, but we don't set the mPreferredVariant
 120                         // variable in case this is called before the user's
 121                         // preference is loaded
 122                         $pv=$this->mMainLanguageCode;
 123                         if(array_key_exists('HTTP_ACCEPT_LANGUAGE', $_SERVER)) {
 124                                 $header = str_replace( '_', '-', strtolower($_SERVER["HTTP_ACCEPT_LANGUAGE"]));
 125                                 $zh = strstr($header, 'zh-');
 126                                 if($zh) {
 127                                         $pv = substr($zh,0,5);
 128                                 }
 129                         }
 130                         return $pv;
 131                 }
 132         }
 133
 134         /**
 135      * dictionary-based conversion
 136      *
 137      * @param string $text the text to be converted
 138      * @param string $toVariant the target language code
 139      * @return string the converted text
 140      * @private
 141      */
 142         function autoConvert($text, $toVariant=false) {
 143                 $fname="LanguageConverter::autoConvert";
 144
 145                 wfProfileIn( $fname );
 146
 147                 if(!$this->mTablesLoaded)
 148                         $this->loadTables();
 149
 150                 if(!$toVariant)
 151                         $toVariant = $this->getPreferredVariant();
 152                 if(!in_array($toVariant, $this->mVariants))
 153                         return $text;
 154
 155                 /* we convert everything except:
 156                    1. html markups (anything between < and >)
 157                    2. html entities
 158                    3. place holders created by the parser
 159                 */
 160                 global $wgParser;
 161                 if (isset($wgParser))
 162                         $marker = '|' . $wgParser->UniqPrefix() . '[\-a-zA-Z0-9]+';
 163                 else
 164                         $marker = "";
 165
 166                 // this one is needed when the text is inside an html markup
 167                 $htmlfix = '|<[^>]+$|^[^<>]*>';
 168
 169                 // disable convert to variants between <code></code> tags
 170                 $codefix = '<code>.+?<\/code>|';
 171
 172                 $reg = '/'.$codefix.'<[^>]+>|&[a-zA-Z#][a-z0-9]+;' . $marker . $htmlfix . '/s';
 173
 174                 $matches = preg_split($reg, $text, -1, PREG_SPLIT_OFFSET_CAPTURE);
 175
 176                 $m = array_shift($matches);
 177
 178                 $ret = $this->translate($m[0], $toVariant);
 179                 $mstart = $m[1]+strlen($m[0]);
 180                 foreach($matches as $m) {
 181                         $ret .= substr($text, $mstart, $m[1]-$mstart);
 182                         $ret .= $this->translate($m[0], $toVariant);
 183                         $mstart = $m[1] + strlen($m[0]);
 184                 }
 185                 wfProfileOut( $fname );
 186                 return $ret;
 187         }
 188
 189         /**
 190          * Translate a string to a variant
 191          * Doesn't process markup or do any of that other stuff, for that use convert()
 192          *
 193          * @param string $text Text to convert
 194          * @param string $variant Variant language code
 195          * @return string Translated text
 196          */
 197         function translate( $text, $variant ) {
 198                 if( !$this->mTablesLoaded )
 199                         $this->loadTables();
 200                 if ( $this->mUseFss ) {
 201                         return fss_exec_replace( $this->mFssObjects[$variant], $text );
 202                 } else {
 203                         return strtr( $text, $this->mTables[$variant] );
 204                 }
 205         }
 206
 207         /**
 208      * convert text to all supported variants
 209      *
 210      * @param string $text the text to be converted
 211      * @return array of string
 212      * @public
 213      */
 214         function autoConvertToAllVariants($text) {
 215                 $fname="LanguageConverter::autoConvertToAllVariants";
 216                 wfProfileIn( $fname );
 217                 if( !$this->mTablesLoaded )
 218                         $this->loadTables();
 219
 220                 $ret = array();
 221                 foreach($this->mVariants as $variant) {
 222                         $ret[$variant] = $this->translate($text, $variant);
 223                 }
 224
 225                 wfProfileOut( $fname );
 226                 return $ret;
 227         }
 228
 229         /**
 230      * convert link text to all supported variants
 231      *
 232      * @param string $text the text to be converted
 233      * @return array of string
 234      * @public
 235      */
 236         function convertLinkToAllVariants($text) {
 237                 if( !$this->mTablesLoaded )
 238                         $this->loadTables();
 239
 240                 $ret = array();
 241                 $tarray = explode($this->mMarkup['begin'], $text);
 242                 $tfirst = array_shift($tarray);
 243
 244                 foreach($this->mVariants as $variant)
 245                         $ret[$variant] = $this->translate($tfirst,$variant);
 246
 247                 foreach($tarray as $txt) {
 248                         $marked = explode($this->mMarkup['end'], $txt, 2);
 249
 250                         foreach($this->mVariants as $variant){
 251                                 $ret[$variant] .= $this->mMarkup['begin'].$marked[0].$this->mMarkup['end'];
 252                                 if(array_key_exists(1, $marked))
 253                                         $ret[$variant] .= $this->translate($marked[1],$variant);
 254                         }
 255
 256                 }
 257
 258                 return $ret;
 259         }
 260
 261
 262         /**
 263          * Convert text using a parser object for context
 264          */
 265         function parserConvert( $text, &$parser ) {
 266                 global $wgDisableLangConversion;
 267                 /* don't do anything if this is the conversion table */
 268                 if ( $parser->mTitle->getNamespace() == NS_MEDIAWIKI &&
 269                                  strpos($parser->mTitle->getText(), "Conversiontable") !== false )
 270                 {
 271                         return $text;
 272                 }
 273
 274                 if($wgDisableLangConversion)
 275                         return $text;
 276
 277                 $text = $this->convert( $text );
 278                 $parser->mOutput->setTitleText( $this->mTitleDisplay );
 279                 return $text;
 280         }
 281
 282         /**
 283          * convert text to different variants of a language. the automatic
 284          * conversion is done in autoConvert(). here we parse the text
 285          * marked with -{}-, which specifies special conversions of the
 286          * text that can not be accomplished in autoConvert()
 287          *
 288          * syntax of the markup:
 289          * -{code1:text1;code2:text2;...}-  or
 290          * -{text}- in which case no conversion should take place for text
 291      *
 292      * @param string $text text to be converted
 293      * @param bool $isTitle whether this conversion is for the article title
 294      * @return string converted text
 295      * @access public
 296      */
 297         function convert( $text , $isTitle=false) {
 298                 $mw =& MagicWord::get( 'notitleconvert'   );
 299                 if( $mw->matchAndRemove( $text ) )
 300                         $this->mDoTitleConvert = false;
 301
 302                 $mw =& MagicWord::get( 'nocontentconvert'   );
 303                 if( $mw->matchAndRemove( $text ) ) {
 304                         $this->mDoContentConvert = false;
 305                 }
 306
 307                 // no conversion if redirecting
 308                 $mw =& MagicWord::get( 'redirect'   );
 309                 if( $mw->matchStart( $text ))
 310                         return $text;
 311
 312                 if( $isTitle ) {
 313                         if($this->mNoTitleConvert){
 314                                 $this->mTitleDisplay = $text;
 315                                 return $text;
 316                         }
 317
 318                         if( !$this->mDoTitleConvert ) {
 319                                 $this->mTitleDisplay = $text;
 320                                 return $text;
 321                         }
 322
 323                         global $wgRequest;
 324                         $isredir = $wgRequest->getText( 'redirect', 'yes' );
 325                         $action = $wgRequest->getText( 'action' );
 326                         if ( $isredir == 'no' || $action == 'edit' ) {
 327                                 return $text;
 328                         }
 329                         else {
 330                                 $this->mTitleDisplay = $this->convert($text);
 331                                 return $this->mTitleDisplay;
 332                         }
 333                 }
 334
 335                 if( !$this->mDoContentConvert )
 336                         return $text;
 337
 338                 $plang = $this->getPreferredVariant();
 339                 if( isset( $this->mVariantFallbacks[$plang] ) ) {
 340                         $fallback = $this->mVariantFallbacks[$plang];
 341                 } else {
 342                         // This sounds... bad?
 343                         $fallback = '';
 344                 }
 345
 346                 $tarray = explode($this->mMarkup['begin'], $text);
 347                 $tfirst = array_shift($tarray);
 348                 $text = $this->autoConvert($tfirst);
 349                 foreach($tarray as $txt) {
 350                         $marked = explode($this->mMarkup['end'], $txt, 2);
 351                         $flags = array();
 352                         $tt = explode($this->mMarkup['flagsep'], $marked[0], 2);
 353
 354                         if(sizeof($tt) == 2) {
 355                                 $f = explode($this->mMarkup['varsep'], $tt[0]);
 356                                 foreach($f as $ff) {
 357                                         $ff = trim($ff);
 358                                         if(array_key_exists($ff, $this->mFlags) &&
 359                                                 !array_key_exists($this->mFlags[$ff], $flags))
 360                                                 $flags[] = $this->mFlags[$ff];
 361                                 }
 362                                 $rules = $tt[1];
 363                         }
 364                         else
 365                                 $rules = $marked[0];
 366
 367                         //FIXME: may cause trouble here...
 368                         //strip &nbsp; since it interferes with the parsing, plus,
 369                         //all spaces should be stripped in this tag anyway.
 370                         $rules = str_replace('&nbsp;', '', $rules);
 371
 372                         $carray = $this->parseManualRule($rules, $flags);
 373                         $disp = '';
 374                         if(array_key_exists($plang, $carray))
 375                                 $disp = $carray[$plang];
 376                         else if(array_key_exists($fallback, $carray))
 377                                 $disp = $carray[$fallback];
 378                         if($disp) {
 379                                 if(in_array('T',  $flags))
 380                                         $this->mTitleDisplay = $disp;
 381                                 else
 382                                         $text .= $disp;
 383
 384                                 if(in_array('A', $flags)) {
 385                                         /* modify the conversion table for this session*/
 386
 387                                         /* fill in the missing variants, if any,
 388                                             with fallbacks */
 389                                         foreach($this->mVariants as $v) {
 390                                                 if(!array_key_exists($v, $carray)) {
 391                                                         $vf = $this->getVariantFallback($v);
 392                                                         if(array_key_exists($vf, $carray))
 393                                                                 $carray[$v] = $carray[$vf];
 394                                                 }
 395                                         }
 396
 397                                         foreach($this->mVariants as $vfrom) {
 398                                                 if(!array_key_exists($vfrom, $carray))
 399                                                         continue;
 400                                                 foreach($this->mVariants as $vto) {
 401                                                         if($vfrom == $vto)
 402                                                                 continue;
 403                                                         if(!array_key_exists($vto, $carray))
 404                                                                 continue;
 405                                                         $this->mTables[$vto][$carray[$vfrom]] = $carray[$vto];
 406
 407                                                 }
 408                                         }
 409                                         if ( $this->mUseFss ) {
 410                                                 $this->generateFssObjects();
 411                                         }
 412                                 }
 413                         }
 414                         else {
 415                                 $text .= $marked[0];
 416                         }
 417                         if(array_key_exists(1, $marked))
 418                                 $text .= $this->autoConvert($marked[1]);
 419                 }
 420
 421                 return $text;
 422         }
 423
 424         /**
 425          * parse the manually marked conversion rule
 426          * @param string $rule the text of the rule
 427          * @return array of the translation in each variant
 428          * @private
 429          */
 430         function parseManualRule($rules, $flags=array()) {
 431
 432                 $choice = explode($this->mMarkup['varsep'], $rules);
 433                 $carray = array();
 434                 if(sizeof($choice) == 1) {
 435                         /* a single choice */
 436                         foreach($this->mVariants as $v)
 437                                 $carray[$v] = $choice[0];
 438                 }
 439                 else {
 440                         foreach($choice as $c) {
 441                                 $v = explode($this->mMarkup['codesep'], $c);
 442                                 if(sizeof($v) != 2) // syntax error, skip
 443                                         continue;
 444                                 $carray[trim($v[0])] = trim($v[1]);
 445                         }
 446                 }
 447                 return $carray;
 448         }
 449
 450         /**
 451          * if a language supports multiple variants, it is
 452          * possible that non-existing link in one variant
 453          * actually exists in another variant. this function
 454          * tries to find it. See e.g. LanguageZh.php
 455          *
 456          * @param string $link the name of the link
 457          * @param mixed $nt the title object of the link
 458          * @return null the input parameters may be modified upon return
 459      * @access public
 460          */
 461         function findVariantLink( &$link, &$nt ) {
 462                 global $wgDisableLangConversion;
 463                 $pref = $this->getPreferredVariant();
 464                 $ns=0;
 465                 if(is_object($nt))
 466                         $ns = $nt->getNamespace();
 467
 468                 $variants = $this->autoConvertToAllVariants($link);
 469                 if($variants == false) //give up
 470                         return;
 471                 foreach( $variants as $v ) {
 472                         $varnt = Title::newFromText( $v, $ns );
 473                         if( $varnt && $varnt->getArticleID() > 0 ) {
 474                                 $nt = $varnt;
 475                                 if( !$wgDisableLangConversion )
 476                                         $link = $v;
 477                                 break;
 478                         }
 479                 }
 480         }
 481
 482     /**
 483      * returns language specific hash options
 484      *
 485      * @access public
 486      */
 487         function getExtraHashOptions() {
 488                 $variant = $this->getPreferredVariant();
 489                 return '!' . $variant ;
 490         }
 491
 492     /**
 493      * get title text as defined in the body of the article text
 494      *
 495      * @access public
 496      */
 497         function getParsedTitle() {
 498                 return $this->mTitleDisplay;
 499         }
 500
 501         /**
 502      * a write lock to the cache
 503      *
 504      * @private
 505      */
 506         function lockCache() {
 507                 global $wgMemc;
 508                 $success = false;
 509                 for($i=0; $i<30; $i++) {
 510                         if($success = $wgMemc->add($this->mCacheKey . "lock", 1, 10))
 511                                 break;
 512                         sleep(1);
 513                 }
 514                 return $success;
 515         }
 516
 517         /**
 518      * unlock cache
 519      *
 520      * @private
 521      */
 522         function unlockCache() {
 523                 global $wgMemc;
 524                 $wgMemc->delete($this->mCacheKey . "lock");
 525         }
 526
 527
 528         /**
 529      * Load default conversion tables
 530      * This method must be implemented in derived class
 531      *
 532      * @private
 533      */
 534         function loadDefaultTables() {
 535                 $name = get_class($this);
 536                 wfDie("Must implement loadDefaultTables() method in class $name");
 537         }
 538
 539         /**
 540      * load conversion tables either from the cache or the disk
 541      * @private
 542      */
 543         function loadTables($fromcache=true) {
 544                 global $wgMemc;
 545                 if( $this->mTablesLoaded )
 546                         return;
 547                 $this->mTablesLoaded = true;
 548                 if($fromcache) {
 549                         $this->mTables = $wgMemc->get( $this->mCacheKey );
 550                         if( !empty( $this->mTables ) ) //all done
 551                                 return;
 552                 }
 553                 // not in cache, or we need a fresh reload.
 554                 // we will first load the default tables
 555                 // then update them using things in MediaWiki:Zhconversiontable/*
 556                 global $wgMessageCache;
 557                 $this->loadDefaultTables();
 558                 foreach($this->mVariants as $var) {
 559                         $cached = $this->parseCachedTable($var);
 560                         $this->mTables[$var] = array_merge($this->mTables[$var], $cached);
 561                 }
 562
 563                 $this->postLoadTables();
 564
 565                 if($this->lockCache()) {
 566                         $wgMemc->set($this->mCacheKey, $this->mTables, 43200);
 567                         $this->unlockCache();
 568                 }
 569                 if ( $this->mUseFss ) {
 570                         $this->generateFssObjects();
 571                 }
 572         }
 573
 574         /**
 575          * Generate FSS objects. The FSS extension must be available.
 576          */
 577         function generateFssObjects() {
 578                 foreach ( $this->mTables as $variant => $table ) {
 579                         $this->mFssObjects[$variant] = fss_prep_replace( $table );
 580                 }
 581         }
 582
 583     /**
 584      * Hook for post processig after conversion tables are loaded
 585      *
 586      */
 587         function postLoadTables() {}
 588
 589     /**
 590      * Reload the conversion tables
 591      *
 592      * @private
 593      */
 594         function reloadTables() {
 595                 if($this->mTables)
 596                         unset($this->mTables);
 597                 $this->mTablesLoaded = false;
 598                 $this->loadTables(false);
 599         }
 600
 601
 602         /**
 603      * parse the conversion table stored in the cache
 604      *
 605      * the tables should be in blocks of the following form:
 606
 607      *          -{
 608      *                  word => word ;
 609      *                  word => word ;
 610      *                  ...
 611      *          }-
 612      *
 613      *  to make the tables more manageable, subpages are allowed
 614      *  and will be parsed recursively if $recursive=true
 615      *
 616      * @private
 617          */
 618         function parseCachedTable($code, $subpage='', $recursive=true) {
 619                 global $wgMessageCache;
 620                 static $parsed = array();
 621
 622                 if(!is_object($wgMessageCache))
 623                         return array();
 624
 625                 $key = 'Conversiontable/'.$code;
 626                 if($subpage)
 627                         $key .= '/' . $subpage;
 628
 629                 if(array_key_exists($key, $parsed))
 630                         return array();
 631
 632
 633                 $txt = $wgMessageCache->get( $key, true, true, true );
 634
 635                 // get all subpage links of the form
 636                 // [[MediaWiki:conversiontable/zh-xx/...|...]]
 637                 $linkhead = $this->mLangObj->getNsText(NS_MEDIAWIKI) . ':Conversiontable';
 638                 $subs = explode('[[', $txt);
 639                 $sublinks = array();
 640                 foreach( $subs as $sub ) {
 641                         $link = explode(']]', $sub, 2);
 642                         if(count($link) != 2)
 643                                 continue;
 644                         $b = explode('|', $link[0]);
 645                         $b = explode('/', trim($b[0]), 3);
 646                         if(count($b)==3)
 647                                 $sublink = $b[2];
 648                         else
 649                                 $sublink = '';
 650
 651                         if($b[0] == $linkhead && $b[1] == $code) {
 652                                 $sublinks[] = $sublink;
 653                         }
 654                 }
 655
 656
 657                 // parse the mappings in this page
 658                 $blocks = explode($this->mMarkup['begin'], $txt);
 659                 array_shift($blocks);
 660                 $ret = array();
 661                 foreach($blocks as $block) {
 662                         $mappings = explode($this->mMarkup['end'], $block, 2);
 663                         $stripped = str_replace(array("'", '"', '*','#'), '', $mappings[0]);
 664                         $table = explode( ';', $stripped );
 665                         foreach( $table as $t ) {
 666                                 $m = explode( '=>', $t );
 667                                 if( count( $m ) != 2)
 668                                         continue;
 669                                 // trim any trailling comments starting with '//'
 670                                 $tt = explode('//', $m[1], 2);
 671                                 $ret[trim($m[0])] = trim($tt[0]);
 672                         }
 673                 }
 674                 $parsed[$key] = true;
 675
 676
 677                 // recursively parse the subpages
 678                 if($recursive) {
 679                         foreach($sublinks as $link) {
 680                                 $s = $this->parseCachedTable($code, $link, $recursive);
 681                                 $ret = array_merge($ret, $s);
 682                         }
 683                 }
 684
 685                 if ($this->mUcfirst) {
 686                         foreach ($ret as $k => $v) {
 687                                 $ret[Language::ucfirst($k)] = Language::ucfirst($v);
 688                         }
 689                 }
 690                 return $ret;
 691         }
 692
 693         /**
 694          * Enclose a string with the "no conversion" tag. This is used by
 695          * various functions in the Parser
 696          *
 697          * @param string $text text to be tagged for no conversion
 698          * @return string the tagged text
 699         */
 700         function markNoConversion($text, $noParse=false) {
 701                 # don't mark if already marked
 702                 if(strpos($text, $this->mMarkup['begin']) ||
 703                    strpos($text, $this->mMarkup['end']))
 704                         return $text;
 705
 706                 $ret = $this->mMarkup['begin'] . $text . $this->mMarkup['end'];
 707                 return $ret;
 708         }
 709
 710         /**
 711          * convert the sorting key for category links. this should make different
 712          * keys that are variants of each other map to the same key
 713         */
 714         function convertCategoryKey( $key ) {
 715                 return $key;
 716         }
 717         /**
 718      * hook to refresh the cache of conversion tables when
 719      * MediaWiki:conversiontable* is updated
 720      * @private
 721         */
 722         function OnArticleSaveComplete($article, $user, $text, $summary, $isminor, $iswatch, $section) {
 723                 $titleobj = $article->getTitle();
 724                 if($titleobj->getNamespace() == NS_MEDIAWIKI) {
 725             /*
 726                         global $wgContLang; // should be an LanguageZh.
 727                         if(get_class($wgContLang) != 'languagezh')
 728                                 return true;
 729             */
 730                         $title = $titleobj->getDBkey();
 731                         $t = explode('/', $title, 3);
 732                         $c = count($t);
 733                         if( $c > 1 && $t[0] == 'Conversiontable' ) {
 734                                 if(in_array($t[1], $this->mVariants)) {
 735                                         $this->reloadTables();
 736                                 }
 737                         }
 738                 }
 739                 return true;
 740         }
 741
 742         function setNoTitleConvert(){
 743                 $this->mNoTitleConvert = true;
 744         }
 745
 746 }
 747
 748 ?>