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 $mTables;
  16         var $mTitleDisplay='';
  17         var $mDoTitleConvert=true, $mDoContentConvert=true;
  18         var $mCacheKey;
  19         var $mLangObj;
  20         var $mMarkup;
  21         var $mFlags;
  22         var $mUcfirst = false;
  23         /**
  24      * Constructor
  25          *
  26      * @param string $maincode the main language code of this language
  27      * @param array $variants the supported variants of this language
  28      * @param array $variantfallback the fallback language of each variant
  29      * @param array $markup array defining the markup used for manual conversion
  30          * @param array $flags array defining the custom strings that maps to the flags
  31      * @access public
  32      */
  33         function __construct($langobj, $maincode,
  34                                                                 $variants=array(),
  35                                                                 $variantfallbacks=array(),
  36                                                                 $markup=array(),
  37                                                                 $flags = array()) {
  38                 global $wgLegalTitleChars;
  39                 $this->mLangObj = $langobj;
  40                 $this->mMainLanguageCode = $maincode;
  41                 $this->mVariants = $variants;
  42                 $this->mVariantFallbacks = $variantfallbacks;
  43                 $this->mCacheKey = wfMemcKey( 'conversiontables', $maincode );
  44                 $m = array('begin'=>'-{', 'flagsep'=>'|', 'codesep'=>':',
  45                                    'varsep'=>';', 'end'=>'}-');
  46                 $this->mMarkup = array_merge($m, $markup);
  47                 $f = array('A'=>'A', 'T'=>'T');
  48                 $this->mFlags = array_merge($f, $flags);
  49         }
  50
  51         /**
  52      * @access public
  53      */
  54         function getVariants() {
  55                 return $this->mVariants;
  56         }
  57
  58         /**
  59          * in case some variant is not defined in the markup, we need
  60          * to have some fallback. for example, in zh, normally people
  61          * will define zh-cn and zh-tw, but less so for zh-sg or zh-hk.
  62          * when zh-sg is preferred but not defined, we will pick zh-cn
  63          * in this case. right now this is only used by zh.
  64          *
  65          * @param string $v the language code of the variant
  66          * @return string the code of the fallback language or false if there is no fallback
  67      * @private
  68         */
  69         function getVariantFallback($v) {
  70                 return $this->mVariantFallbacks[$v];
  71         }
  72
  73
  74         /**
  75          * get preferred language variants.
  76          * @param boolean $fromUser Get it from $wgUser's preferences
  77      * @return string the preferred language code
  78      * @access public
  79         */
  80         function getPreferredVariant( $fromUser = true ) {
  81                 global $wgUser, $wgRequest, $wgVariantArticlePath;
  82
  83                 if($this->mPreferredVariant)
  84                         return $this->mPreferredVariant;
  85
  86                 // see if the preference is set in the request
  87                 $req = $wgRequest->getText( 'variant' );
  88                 if( in_array( $req, $this->mVariants ) ) {
  89                         $this->mPreferredVariant = $req;
  90                         return $req;
  91                 }
  92
  93                 // check the syntax /code/ArticleTitle
  94                 if($wgVariantArticlePath!=false && isset($_SERVER['SCRIPT_NAME'])){
  95                         // Note: SCRIPT_NAME probably won't hold the correct value if PHP is run as CGI
  96                         // (it will hold path to php.cgi binary), and might not exist on some very old PHP installations
  97                         $scriptBase = basename( $_SERVER['SCRIPT_NAME'] );
  98                         if(in_array($scriptBase,$this->mVariants)){
  99                                 $this->mPreferredVariant = $scriptBase;
 100                                 return $this->mPreferredVariant;
 101                         }
 102                 }
 103
 104                 // get language variant preference from logged in users
 105                 // Don't call this on stub objects because that causes infinite
 106                 // recursion during initialisation
 107                 if( $fromUser && $wgUser->isLoggedIn() )  {
 108                         $this->mPreferredVariant = $wgUser->getOption('variant');
 109                         return $this->mPreferredVariant;
 110                 }
 111
 112                 # FIXME rewrite code for parsing http header. The current code
 113                 # is written specific for detecting zh- variants
 114                 if( !$this->mPreferredVariant ) {
 115                         // see if some supported language variant is set in the
 116                         // http header, but we don't set the mPreferredVariant
 117                         // variable in case this is called before the user's
 118                         // preference is loaded
 119                         $pv=$this->mMainLanguageCode;
 120                         if(array_key_exists('HTTP_ACCEPT_LANGUAGE', $_SERVER)) {
 121                                 $header = str_replace( '_', '-', strtolower($_SERVER["HTTP_ACCEPT_LANGUAGE"]));
 122                                 $zh = strstr($header, $pv.'-');
 123                                 if($zh) {
 124                                         $pv = substr($zh,0,5);
 125                                 }
 126                         }
 127                         return $pv;
 128                 }
 129         }
 130
 131         /**
 132      * dictionary-based conversion
 133      *
 134      * @param string $text the text to be converted
 135      * @param string $toVariant the target language code
 136      * @return string the converted text
 137      * @private
 138      */
 139         function autoConvert($text, $toVariant=false) {
 140                 $fname="LanguageConverter::autoConvert";
 141
 142                 wfProfileIn( $fname );
 143
 144                 if(!$this->mTablesLoaded)
 145                         $this->loadTables();
 146
 147                 if(!$toVariant)
 148                         $toVariant = $this->getPreferredVariant();
 149                 if(!in_array($toVariant, $this->mVariants))
 150                         return $text;
 151
 152                 /* we convert everything except:
 153                    1. html markups (anything between < and >)
 154                    2. html entities
 155                    3. place holders created by the parser
 156                 */
 157                 global $wgParser;
 158                 if (isset($wgParser))
 159                         $marker = '|' . $wgParser->UniqPrefix() . '[\-a-zA-Z0-9]+';
 160                 else
 161                         $marker = "";
 162
 163                 // this one is needed when the text is inside an html markup
 164                 $htmlfix = '|<[^>]+$|^[^<>]*>';
 165
 166                 // disable convert to variants between <code></code> tags
 167                 $codefix = '<code>.+?<\/code>|';
 168                 // disable convertsion of <script type="text/javascript"> ... </script>
 169                 $scriptfix = '<script.*?>.*?<\/script>|';
 170
 171                 $reg = '/'.$codefix . $scriptfix . '<[^>]+>|&[a-zA-Z#][a-z0-9]+;' . $marker . $htmlfix . '/s';
 172
 173                 $matches = preg_split($reg, $text, -1, PREG_SPLIT_OFFSET_CAPTURE);
 174
 175                 $m = array_shift($matches);
 176
 177                 $ret = $this->translate($m[0], $toVariant);
 178                 $mstart = $m[1]+strlen($m[0]);
 179                 foreach($matches as $m) {
 180                         $ret .= substr($text, $mstart, $m[1]-$mstart);
 181                         $ret .= $this->translate($m[0], $toVariant);
 182                         $mstart = $m[1] + strlen($m[0]);
 183                 }
 184                 wfProfileOut( $fname );
 185                 return $ret;
 186         }
 187
 188         /**
 189          * Translate a string to a variant
 190          * Doesn't process markup or do any of that other stuff, for that use convert()
 191          *
 192          * @param string $text Text to convert
 193          * @param string $variant Variant language code
 194          * @return string Translated text
 195          */
 196         function translate( $text, $variant ) {
 197                 wfProfileIn( __METHOD__ );
 198                 if( !$this->mTablesLoaded )
 199                         $this->loadTables();
 200                 $text = $this->mTables[$variant]->replace( $text );
 201                 wfProfileOut( __METHOD__ );
 202                 return $text;
 203         }
 204
 205         /**
 206      * convert text to all supported variants
 207      *
 208      * @param string $text the text to be converted
 209      * @return array of string
 210      * @public
 211      */
 212         function autoConvertToAllVariants($text) {
 213                 $fname="LanguageConverter::autoConvertToAllVariants";
 214                 wfProfileIn( $fname );
 215                 if( !$this->mTablesLoaded )
 216                         $this->loadTables();
 217
 218                 $ret = array();
 219                 foreach($this->mVariants as $variant) {
 220                         $ret[$variant] = $this->translate($text, $variant);
 221                 }
 222
 223                 wfProfileOut( $fname );
 224                 return $ret;
 225         }
 226
 227         /**
 228      * convert link text to all supported variants
 229      *
 230      * @param string $text the text to be converted
 231      * @return array of string
 232      * @public
 233      */
 234         function convertLinkToAllVariants($text) {
 235                 if( !$this->mTablesLoaded )
 236                         $this->loadTables();
 237
 238                 $ret = array();
 239                 $tarray = explode($this->mMarkup['begin'], $text);
 240                 $tfirst = array_shift($tarray);
 241
 242                 foreach($this->mVariants as $variant)
 243                         $ret[$variant] = $this->translate($tfirst,$variant);
 244
 245                 foreach($tarray as $txt) {
 246                         $marked = explode($this->mMarkup['end'], $txt, 2);
 247
 248                         foreach($this->mVariants as $variant){
 249                                 $ret[$variant] .= $this->mMarkup['begin'].$marked[0].$this->mMarkup['end'];
 250                                 if(array_key_exists(1, $marked))
 251                                         $ret[$variant] .= $this->translate($marked[1],$variant);
 252                         }
 253
 254                 }
 255
 256                 return $ret;
 257         }
 258
 259
 260         /**
 261          * Convert text using a parser object for context
 262          */
 263         function parserConvert( $text, &$parser ) {
 264                 global $wgDisableLangConversion;
 265                 /* don't do anything if this is the conversion table */
 266                 if ( $parser->mTitle->getNamespace() == NS_MEDIAWIKI &&
 267                                  strpos($parser->mTitle->getText(), "Conversiontable") !== false )
 268                 {
 269                         return $text;
 270                 }
 271
 272                 if($wgDisableLangConversion)
 273                         return $text;
 274
 275                 $text = $this->convert( $text );
 276                 $parser->mOutput->setTitleText( $this->mTitleDisplay );
 277                 return $text;
 278         }
 279
 280         /**
 281          * convert text to different variants of a language. the automatic
 282          * conversion is done in autoConvert(). here we parse the text
 283          * marked with -{}-, which specifies special conversions of the
 284          * text that can not be accomplished in autoConvert()
 285          *
 286          * syntax of the markup:
 287          * -{code1:text1;code2:text2;...}-  or
 288          * -{text}- in which case no conversion should take place for text
 289      *
 290      * @param string $text text to be converted
 291      * @param bool $isTitle whether this conversion is for the article title
 292      * @return string converted text
 293      * @access public
 294      */
 295         function convert( $text , $isTitle=false) {
 296                 $mw =& MagicWord::get( 'notitleconvert'   );
 297                 if( $mw->matchAndRemove( $text ) )
 298                         $this->mDoTitleConvert = false;
 299
 300                 $mw =& MagicWord::get( 'nocontentconvert'   );
 301                 if( $mw->matchAndRemove( $text ) ) {
 302                         $this->mDoContentConvert = false;
 303                 }
 304
 305                 // no conversion if redirecting
 306                 $mw =& MagicWord::get( 'redirect'   );
 307                 if( $mw->matchStart( $text ))
 308                         return $text;
 309
 310                 if( $isTitle ) {
 311                         if( !$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]->setPair($carray[$vfrom], $carray[$vto]);
 399                                                 }
 400                                         }
 401                                 }
 402                         }
 403                         else {
 404                                 $text .= $marked[0];
 405                         }
 406                         if(array_key_exists(1, $marked))
 407                                 $text .= $this->autoConvert($marked[1]);
 408                 }
 409
 410                 return $text;
 411         }
 412
 413         /**
 414          * parse the manually marked conversion rule
 415          * @param string $rule the text of the rule
 416          * @return array of the translation in each variant
 417          * @private
 418          */
 419         function parseManualRule($rules, $flags=array()) {
 420
 421                 $choice = explode($this->mMarkup['varsep'], $rules);
 422                 $carray = array();
 423                 if(sizeof($choice) == 1) {
 424                         /* a single choice */
 425                         foreach($this->mVariants as $v)
 426                                 $carray[$v] = $choice[0];
 427                 }
 428                 else {
 429                         foreach($choice as $c) {
 430                                 $v = explode($this->mMarkup['codesep'], $c);
 431                                 if(sizeof($v) != 2) // syntax error, skip
 432                                         continue;
 433                                 $carray[trim($v[0])] = trim($v[1]);
 434                         }
 435                 }
 436                 return $carray;
 437         }
 438
 439         /**
 440          * if a language supports multiple variants, it is
 441          * possible that non-existing link in one variant
 442          * actually exists in another variant. this function
 443          * tries to find it. See e.g. LanguageZh.php
 444          *
 445          * @param string $link the name of the link
 446          * @param mixed $nt the title object of the link
 447          * @return null the input parameters may be modified upon return
 448      * @access public
 449          */
 450         function findVariantLink( &$link, &$nt ) {
 451                 global $wgDisableLangConversion;
 452                 $linkBatch = new LinkBatch();
 453
 454                 $ns=NS_MAIN;
 455
 456                 if(is_object($nt))
 457                         $ns = $nt->getNamespace();
 458
 459                 $variants = $this->autoConvertToAllVariants($link);
 460                 if($variants == false) //give up
 461                         return;
 462
 463                 $titles = array();
 464
 465                 foreach( $variants as $v ) {
 466                         if($v != $link){
 467                                 $varnt = Title::newFromText( $v, $ns );
 468                                 if(!is_null($varnt)){
 469                                         $linkBatch->addObj($varnt);
 470                                         $titles[]=$varnt;
 471                                 }
 472                         }
 473                 }
 474
 475                 // fetch all variants in single query
 476                 $linkBatch->execute();
 477
 478                 foreach( $titles as $varnt ) {
 479                         if( $varnt->getArticleID() > 0 ) {
 480                                 $nt = $varnt;
 481                                 if( !$wgDisableLangConversion )
 482                                         $link = $v;
 483                                 break;
 484                         }
 485                 }
 486         }
 487
 488     /**
 489      * returns language specific hash options
 490      *
 491      * @access public
 492      */
 493         function getExtraHashOptions() {
 494                 $variant = $this->getPreferredVariant();
 495                 return '!' . $variant ;
 496         }
 497
 498     /**
 499      * get title text as defined in the body of the article text
 500      *
 501      * @access public
 502      */
 503         function getParsedTitle() {
 504                 return $this->mTitleDisplay;
 505         }
 506
 507         /**
 508      * a write lock to the cache
 509      *
 510      * @private
 511      */
 512         function lockCache() {
 513                 global $wgMemc;
 514                 $success = false;
 515                 for($i=0; $i<30; $i++) {
 516                         if($success = $wgMemc->add($this->mCacheKey . "lock", 1, 10))
 517                                 break;
 518                         sleep(1);
 519                 }
 520                 return $success;
 521         }
 522
 523         /**
 524      * unlock cache
 525      *
 526      * @private
 527      */
 528         function unlockCache() {
 529                 global $wgMemc;
 530                 $wgMemc->delete($this->mCacheKey . "lock");
 531         }
 532
 533
 534         /**
 535      * Load default conversion tables
 536      * This method must be implemented in derived class
 537      *
 538      * @private
 539      */
 540         function loadDefaultTables() {
 541                 $name = get_class($this);
 542                 wfDie("Must implement loadDefaultTables() method in class $name");
 543         }
 544
 545         /**
 546      * load conversion tables either from the cache or the disk
 547      * @private
 548      */
 549         function loadTables($fromcache=true) {
 550                 global $wgMemc;
 551                 if( $this->mTablesLoaded )
 552                         return;
 553                 wfProfileIn( __METHOD__ );
 554                 $this->mTablesLoaded = true;
 555                 $this->mTables = false;
 556                 if($fromcache) {
 557                         wfProfileIn( __METHOD__.'-cache' );
 558                         $this->mTables = $wgMemc->get( $this->mCacheKey );
 559                         wfProfileOut( __METHOD__.'-cache' );
 560                 }
 561                 if ( !$this->mTables || !isset( $this->mTables['VERSION 2'] ) ) {
 562                         wfProfileIn( __METHOD__.'-recache' );
 563                         // not in cache, or we need a fresh reload.
 564                         // we will first load the default tables
 565                         // then update them using things in MediaWiki:Zhconversiontable/*
 566                         global $wgMessageCache;
 567                         $this->loadDefaultTables();
 568                         foreach($this->mVariants as $var) {
 569                                 $cached = $this->parseCachedTable($var);
 570                                 $this->mTables[$var]->mergeArray($cached);
 571                         }
 572
 573                         $this->postLoadTables();
 574                         $this->mTables['VERSION 2'] = true;
 575
 576                         if($this->lockCache()) {
 577                                 $wgMemc->set($this->mCacheKey, $this->mTables, 43200);
 578                                 $this->unlockCache();
 579                         }
 580                         wfProfileOut( __METHOD__.'-recache' );
 581                 }
 582                 wfProfileOut( __METHOD__ );
 583         }
 584
 585     /**
 586      * Hook for post processig after conversion tables are loaded
 587      *
 588      */
 589         function postLoadTables() {}
 590
 591     /**
 592      * Reload the conversion tables
 593      *
 594      * @private
 595      */
 596         function reloadTables() {
 597                 if($this->mTables)
 598                         unset($this->mTables);
 599                 $this->mTablesLoaded = false;
 600                 $this->loadTables(false);
 601         }
 602
 603
 604         /**
 605      * parse the conversion table stored in the cache
 606      *
 607      * the tables should be in blocks of the following form:
 608
 609      *          -{
 610      *                  word => word ;
 611      *                  word => word ;
 612      *                  ...
 613      *          }-
 614      *
 615      *  to make the tables more manageable, subpages are allowed
 616      *  and will be parsed recursively if $recursive=true
 617      *
 618      * @private
 619          */
 620         function parseCachedTable($code, $subpage='', $recursive=true) {
 621                 global $wgMessageCache;
 622                 static $parsed = array();
 623
 624                 if(!is_object($wgMessageCache))
 625                         return array();
 626
 627                 $key = 'Conversiontable/'.$code;
 628                 if($subpage)
 629                         $key .= '/' . $subpage;
 630
 631                 if(array_key_exists($key, $parsed))
 632                         return array();
 633
 634
 635                 $txt = $wgMessageCache->get( $key, true, true, true );
 636
 637                 // get all subpage links of the form
 638                 // [[MediaWiki:conversiontable/zh-xx/...|...]]
 639                 $linkhead = $this->mLangObj->getNsText(NS_MEDIAWIKI) . ':Conversiontable';
 640                 $subs = explode('[[', $txt);
 641                 $sublinks = array();
 642                 foreach( $subs as $sub ) {
 643                         $link = explode(']]', $sub, 2);
 644                         if(count($link) != 2)
 645                                 continue;
 646                         $b = explode('|', $link[0]);
 647                         $b = explode('/', trim($b[0]), 3);
 648                         if(count($b)==3)
 649                                 $sublink = $b[2];
 650                         else
 651                                 $sublink = '';
 652
 653                         if($b[0] == $linkhead && $b[1] == $code) {
 654                                 $sublinks[] = $sublink;
 655                         }
 656                 }
 657
 658
 659                 // parse the mappings in this page
 660                 $blocks = explode($this->mMarkup['begin'], $txt);
 661                 array_shift($blocks);
 662                 $ret = array();
 663                 foreach($blocks as $block) {
 664                         $mappings = explode($this->mMarkup['end'], $block, 2);
 665                         $stripped = str_replace(array("'", '"', '*','#'), '', $mappings[0]);
 666                         $table = explode( ';', $stripped );
 667                         foreach( $table as $t ) {
 668                                 $m = explode( '=>', $t );
 669                                 if( count( $m ) != 2)
 670                                         continue;
 671                                 // trim any trailling comments starting with '//'
 672                                 $tt = explode('//', $m[1], 2);
 673                                 $ret[trim($m[0])] = trim($tt[0]);
 674                         }
 675                 }
 676                 $parsed[$key] = true;
 677
 678
 679                 // recursively parse the subpages
 680                 if($recursive) {
 681                         foreach($sublinks as $link) {
 682                                 $s = $this->parseCachedTable($code, $link, $recursive);
 683                                 $ret = array_merge($ret, $s);
 684                         }
 685                 }
 686
 687                 if ($this->mUcfirst) {
 688                         foreach ($ret as $k => $v) {
 689                                 $ret[Language::ucfirst($k)] = Language::ucfirst($v);
 690                         }
 691                 }
 692                 return $ret;
 693         }
 694
 695         /**
 696          * Enclose a string with the "no conversion" tag. This is used by
 697          * various functions in the Parser
 698          *
 699          * @param string $text text to be tagged for no conversion
 700          * @return string the tagged text
 701         */
 702         function markNoConversion($text, $noParse=false) {
 703                 # don't mark if already marked
 704                 if(strpos($text, $this->mMarkup['begin']) ||
 705                    strpos($text, $this->mMarkup['end']))
 706                         return $text;
 707
 708                 $ret = $this->mMarkup['begin'] . $text . $this->mMarkup['end'];
 709                 return $ret;
 710         }
 711
 712         /**
 713          * convert the sorting key for category links. this should make different
 714          * keys that are variants of each other map to the same key
 715         */
 716         function convertCategoryKey( $key ) {
 717                 return $key;
 718         }
 719         /**
 720      * hook to refresh the cache of conversion tables when
 721      * MediaWiki:conversiontable* is updated
 722      * @private
 723         */
 724         function OnArticleSaveComplete($article, $user, $text, $summary, $isminor, $iswatch, $section) {
 725                 $titleobj = $article->getTitle();
 726                 if($titleobj->getNamespace() == NS_MEDIAWIKI) {
 727             /*
 728                         global $wgContLang; // should be an LanguageZh.
 729                         if(get_class($wgContLang) != 'languagezh')
 730                                 return true;
 731             */
 732                         $title = $titleobj->getDBkey();
 733                         $t = explode('/', $title, 3);
 734                         $c = count($t);
 735                         if( $c > 1 && $t[0] == 'Conversiontable' ) {
 736                                 if(in_array($t[1], $this->mVariants)) {
 737                                         $this->reloadTables();
 738                                 }
 739                         }
 740                 }
 741                 return true;
 742         }
 743
 744         /**
 745          * Armour rendered math against conversion
 746          * Default is do nothing, since the process can interfere with
 747          * parseManualRule() if format -{ alter1 ; alter2 }- is enabled
 748          */
 749         function armourMath($text){
 750                 return $text;
 751         }
 752
 753
 754 }
 755
 756 ?>