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                 $scriptBase = basename( $_SERVER['SCRIPT_NAME'] );
 101                 if(in_array($scriptBase,$this->mVariants)){
 102                         $this->mPreferredVariant = $scriptBase;
 103                         return $this->mPreferredVariant;
 104                 }
 105
 106                 // get language variant preference from logged in users
 107                 // Don't call this on stub objects because that causes infinite
 108                 // recursion during initialisation
 109                 if( $fromUser && $wgUser->isLoggedIn() )  {
 110                         $this->mPreferredVariant = $wgUser->getOption('variant');
 111                         return $this->mPreferredVariant;
 112                 }
 113
 114                 # FIXME rewrite code for parsing http header. The current code
 115                 # is written specific for detecting zh- variants
 116                 if( !$this->mPreferredVariant ) {
 117                         // see if some supported language variant is set in the
 118                         // http header, but we don't set the mPreferredVariant
 119                         // variable in case this is called before the user's
 120                         // preference is loaded
 121                         $pv=$this->mMainLanguageCode;
 122                         if(array_key_exists('HTTP_ACCEPT_LANGUAGE', $_SERVER)) {
 123                                 $header = str_replace( '_', '-', strtolower($_SERVER["HTTP_ACCEPT_LANGUAGE"]));
 124                                 $zh = strstr($header, 'zh-');
 125                                 if($zh) {
 126                                         $pv = substr($zh,0,5);
 127                                 }
 128                         }
 129                         return $pv;
 130                 }
 131         }
 132
 133         /**
 134      * dictionary-based conversion
 135      *
 136      * @param string $text the text to be converted
 137      * @param string $toVariant the target language code
 138      * @return string the converted text
 139      * @private
 140      */
 141         function autoConvert($text, $toVariant=false) {
 142                 $fname="LanguageConverter::autoConvert";
 143
 144                 wfProfileIn( $fname );
 145
 146                 if(!$this->mTablesLoaded)
 147                         $this->loadTables();
 148
 149                 if(!$toVariant)
 150                         $toVariant = $this->getPreferredVariant();
 151                 if(!in_array($toVariant, $this->mVariants))
 152                         return $text;
 153
 154                 /* we convert everything except:
 155                    1. html markups (anything between < and >)
 156                    2. html entities
 157                    3. place holders created by the parser
 158                 */
 159                 global $wgParser;
 160                 if (isset($wgParser))
 161                         $marker = '|' . $wgParser->UniqPrefix() . '[\-a-zA-Z0-9]+';
 162                 else
 163                         $marker = "";
 164
 165                 // this one is needed when the text is inside an html markup
 166                 $htmlfix = '|<[^>]+$|^[^<>]*>';
 167
 168                 // disable convert to variants between <code></code> tags
 169                 $codefix = '<code>.+?<\/code>|';
 170
 171                 $reg = '/'.$codefix.'<[^>]+>|&[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, $variant ) {
 197                 if( !$this->mTablesLoaded )
 198                         $this->loadTables();
 199                 if ( $this->mUseFss ) {
 200                         wfProfileIn( __METHOD__.'-fss' );
 201                         $text = fss_exec_replace( $this->mFssObjects[$variant], $text );
 202                         wfProfileOut( __METHOD__.'-fss' );
 203                         return $text;
 204                 } else {
 205                         wfProfileIn( __METHOD__.'-strtr' );
 206                         $text = strtr( $text, $this->mTables[$variant] );
 207                         wfProfileOut( __METHOD__.'-strtr' );
 208                         return $text;
 209                 }
 210         }
 211
 212         /**
 213      * convert text to all supported variants
 214      *
 215      * @param string $text the text to be converted
 216      * @return array of string
 217      * @public
 218      */
 219         function autoConvertToAllVariants($text) {
 220                 $fname="LanguageConverter::autoConvertToAllVariants";
 221                 wfProfileIn( $fname );
 222                 if( !$this->mTablesLoaded )
 223                         $this->loadTables();
 224
 225                 $ret = array();
 226                 foreach($this->mVariants as $variant) {
 227                         $ret[$variant] = $this->translate($text, $variant);
 228                 }
 229
 230                 wfProfileOut( $fname );
 231                 return $ret;
 232         }
 233
 234         /**
 235      * convert link text to all supported variants
 236      *
 237      * @param string $text the text to be converted
 238      * @return array of string
 239      * @public
 240      */
 241         function convertLinkToAllVariants($text) {
 242                 if( !$this->mTablesLoaded )
 243                         $this->loadTables();
 244
 245                 $ret = array();
 246                 $tarray = explode($this->mMarkup['begin'], $text);
 247                 $tfirst = array_shift($tarray);
 248
 249                 foreach($this->mVariants as $variant)
 250                         $ret[$variant] = $this->translate($tfirst,$variant);
 251
 252                 foreach($tarray as $txt) {
 253                         $marked = explode($this->mMarkup['end'], $txt, 2);
 254
 255                         foreach($this->mVariants as $variant){
 256                                 $ret[$variant] .= $this->mMarkup['begin'].$marked[0].$this->mMarkup['end'];
 257                                 if(array_key_exists(1, $marked))
 258                                         $ret[$variant] .= $this->translate($marked[1],$variant);
 259                         }
 260
 261                 }
 262
 263                 return $ret;
 264         }
 265
 266
 267         /**
 268          * Convert text using a parser object for context
 269          */
 270         function parserConvert( $text, &$parser ) {
 271                 global $wgDisableLangConversion;
 272                 /* don't do anything if this is the conversion table */
 273                 if ( $parser->mTitle->getNamespace() == NS_MEDIAWIKI &&
 274                                  strpos($parser->mTitle->getText(), "Conversiontable") !== false )
 275                 {
 276                         return $text;
 277                 }
 278
 279                 if($wgDisableLangConversion)
 280                         return $text;
 281
 282                 $text = $this->convert( $text );
 283                 $parser->mOutput->setTitleText( $this->mTitleDisplay );
 284                 return $text;
 285         }
 286
 287         /**
 288          * convert text to different variants of a language. the automatic
 289          * conversion is done in autoConvert(). here we parse the text
 290          * marked with -{}-, which specifies special conversions of the
 291          * text that can not be accomplished in autoConvert()
 292          *
 293          * syntax of the markup:
 294          * -{code1:text1;code2:text2;...}-  or
 295          * -{text}- in which case no conversion should take place for text
 296      *
 297      * @param string $text text to be converted
 298      * @param bool $isTitle whether this conversion is for the article title
 299      * @return string converted text
 300      * @access public
 301      */
 302         function convert( $text , $isTitle=false) {
 303                 $mw =& MagicWord::get( 'notitleconvert'   );
 304                 if( $mw->matchAndRemove( $text ) )
 305                         $this->mDoTitleConvert = false;
 306
 307                 $mw =& MagicWord::get( 'nocontentconvert'   );
 308                 if( $mw->matchAndRemove( $text ) ) {
 309                         $this->mDoContentConvert = false;
 310                 }
 311
 312                 // no conversion if redirecting
 313                 $mw =& MagicWord::get( 'redirect'   );
 314                 if( $mw->matchStart( $text ))
 315                         return $text;
 316
 317                 if( $isTitle ) {
 318                         if($this->mNoTitleConvert){
 319                                 $this->mTitleDisplay = $text;
 320                                 return $text;
 321                         }
 322
 323                         if( !$this->mDoTitleConvert ) {
 324                                 $this->mTitleDisplay = $text;
 325                                 return $text;
 326                         }
 327
 328                         global $wgRequest;
 329                         $isredir = $wgRequest->getText( 'redirect', 'yes' );
 330                         $action = $wgRequest->getText( 'action' );
 331                         if ( $isredir == 'no' || $action == 'edit' ) {
 332                                 return $text;
 333                         }
 334                         else {
 335                                 $this->mTitleDisplay = $this->convert($text);
 336                                 return $this->mTitleDisplay;
 337                         }
 338                 }
 339
 340                 if( !$this->mDoContentConvert )
 341                         return $text;
 342
 343                 $plang = $this->getPreferredVariant();
 344                 if( isset( $this->mVariantFallbacks[$plang] ) ) {
 345                         $fallback = $this->mVariantFallbacks[$plang];
 346                 } else {
 347                         // This sounds... bad?
 348                         $fallback = '';
 349                 }
 350
 351                 $tarray = explode($this->mMarkup['begin'], $text);
 352                 $tfirst = array_shift($tarray);
 353                 $text = $this->autoConvert($tfirst);
 354                 foreach($tarray as $txt) {
 355                         $marked = explode($this->mMarkup['end'], $txt, 2);
 356                         $flags = array();
 357                         $tt = explode($this->mMarkup['flagsep'], $marked[0], 2);
 358
 359                         if(sizeof($tt) == 2) {
 360                                 $f = explode($this->mMarkup['varsep'], $tt[0]);
 361                                 foreach($f as $ff) {
 362                                         $ff = trim($ff);
 363                                         if(array_key_exists($ff, $this->mFlags) &&
 364                                                 !array_key_exists($this->mFlags[$ff], $flags))
 365                                                 $flags[] = $this->mFlags[$ff];
 366                                 }
 367                                 $rules = $tt[1];
 368                         }
 369                         else
 370                                 $rules = $marked[0];
 371
 372                         //FIXME: may cause trouble here...
 373                         //strip &nbsp; since it interferes with the parsing, plus,
 374                         //all spaces should be stripped in this tag anyway.
 375                         $rules = str_replace('&nbsp;', '', $rules);
 376
 377                         $carray = $this->parseManualRule($rules, $flags);
 378                         $disp = '';
 379                         if(array_key_exists($plang, $carray))
 380                                 $disp = $carray[$plang];
 381                         else if(array_key_exists($fallback, $carray))
 382                                 $disp = $carray[$fallback];
 383                         if($disp) {
 384                                 if(in_array('T',  $flags))
 385                                         $this->mTitleDisplay = $disp;
 386                                 else
 387                                         $text .= $disp;
 388
 389                                 if(in_array('A', $flags)) {
 390                                         /* modify the conversion table for this session*/
 391
 392                                         /* fill in the missing variants, if any,
 393                                             with fallbacks */
 394                                         foreach($this->mVariants as $v) {
 395                                                 if(!array_key_exists($v, $carray)) {
 396                                                         $vf = $this->getVariantFallback($v);
 397                                                         if(array_key_exists($vf, $carray))
 398                                                                 $carray[$v] = $carray[$vf];
 399                                                 }
 400                                         }
 401
 402                                         foreach($this->mVariants as $vfrom) {
 403                                                 if(!array_key_exists($vfrom, $carray))
 404                                                         continue;
 405                                                 foreach($this->mVariants as $vto) {
 406                                                         if($vfrom == $vto)
 407                                                                 continue;
 408                                                         if(!array_key_exists($vto, $carray))
 409                                                                 continue;
 410                                                         $this->mTables[$vto][$carray[$vfrom]] = $carray[$vto];
 411
 412                                                 }
 413                                         }
 414                                         if ( $this->mUseFss ) {
 415                                                 $this->generateFssObjects();
 416                                         }
 417                                 }
 418                         }
 419                         else {
 420                                 $text .= $marked[0];
 421                         }
 422                         if(array_key_exists(1, $marked))
 423                                 $text .= $this->autoConvert($marked[1]);
 424                 }
 425
 426                 return $text;
 427         }
 428
 429         /**
 430          * parse the manually marked conversion rule
 431          * @param string $rule the text of the rule
 432          * @return array of the translation in each variant
 433          * @private
 434          */
 435         function parseManualRule($rules, $flags=array()) {
 436
 437                 $choice = explode($this->mMarkup['varsep'], $rules);
 438                 $carray = array();
 439                 if(sizeof($choice) == 1) {
 440                         /* a single choice */
 441                         foreach($this->mVariants as $v)
 442                                 $carray[$v] = $choice[0];
 443                 }
 444                 else {
 445                         foreach($choice as $c) {
 446                                 $v = explode($this->mMarkup['codesep'], $c);
 447                                 if(sizeof($v) != 2) // syntax error, skip
 448                                         continue;
 449                                 $carray[trim($v[0])] = trim($v[1]);
 450                         }
 451                 }
 452                 return $carray;
 453         }
 454
 455         /**
 456          * if a language supports multiple variants, it is
 457          * possible that non-existing link in one variant
 458          * actually exists in another variant. this function
 459          * tries to find it. See e.g. LanguageZh.php
 460          *
 461          * @param string $link the name of the link
 462          * @param mixed $nt the title object of the link
 463          * @return null the input parameters may be modified upon return
 464      * @access public
 465          */
 466         function findVariantLink( &$link, &$nt ) {
 467                 global $wgDisableLangConversion;
 468                 $pref = $this->getPreferredVariant();
 469                 $ns=0;
 470                 if(is_object($nt))
 471                         $ns = $nt->getNamespace();
 472
 473                 $variants = $this->autoConvertToAllVariants($link);
 474                 if($variants == false) //give up
 475                         return;
 476                 foreach( $variants as $v ) {
 477                         $varnt = Title::newFromText( $v, $ns );
 478                         if( $varnt && $varnt->getArticleID() > 0 ) {
 479                                 $nt = $varnt;
 480                                 if( !$wgDisableLangConversion )
 481                                         $link = $v;
 482                                 break;
 483                         }
 484                 }
 485         }
 486
 487     /**
 488      * returns language specific hash options
 489      *
 490      * @access public
 491      */
 492         function getExtraHashOptions() {
 493                 $variant = $this->getPreferredVariant();
 494                 return '!' . $variant ;
 495         }
 496
 497     /**
 498      * get title text as defined in the body of the article text
 499      *
 500      * @access public
 501      */
 502         function getParsedTitle() {
 503                 return $this->mTitleDisplay;
 504         }
 505
 506         /**
 507      * a write lock to the cache
 508      *
 509      * @private
 510      */
 511         function lockCache() {
 512                 global $wgMemc;
 513                 $success = false;
 514                 for($i=0; $i<30; $i++) {
 515                         if($success = $wgMemc->add($this->mCacheKey . "lock", 1, 10))
 516                                 break;
 517                         sleep(1);
 518                 }
 519                 return $success;
 520         }
 521
 522         /**
 523      * unlock cache
 524      *
 525      * @private
 526      */
 527         function unlockCache() {
 528                 global $wgMemc;
 529                 $wgMemc->delete($this->mCacheKey . "lock");
 530         }
 531
 532
 533         /**
 534      * Load default conversion tables
 535      * This method must be implemented in derived class
 536      *
 537      * @private
 538      */
 539         function loadDefaultTables() {
 540                 $name = get_class($this);
 541                 wfDie("Must implement loadDefaultTables() method in class $name");
 542         }
 543
 544         /**
 545      * load conversion tables either from the cache or the disk
 546      * @private
 547      */
 548         function loadTables($fromcache=true) {
 549                 global $wgMemc;
 550                 if( $this->mTablesLoaded )
 551                         return;
 552                 wfProfileIn( __METHOD__ );
 553                 $this->mTablesLoaded = true;
 554                 $this->mTables = false;
 555                 if($fromcache) {
 556                         wfProfileIn( __METHOD__.'-cache' );
 557                         $this->mTables = $wgMemc->get( $this->mCacheKey );
 558                         wfProfileOut( __METHOD__.'-cache' );
 559                 }
 560                 if ( !$this->mTables ) {
 561                         wfProfileOut( __METHOD__.'-recache' );
 562                         // not in cache, or we need a fresh reload.
 563                         // we will first load the default tables
 564                         // then update them using things in MediaWiki:Zhconversiontable/*
 565                         global $wgMessageCache;
 566                         $this->loadDefaultTables();
 567                         foreach($this->mVariants as $var) {
 568                                 $cached = $this->parseCachedTable($var);
 569                                 $this->mTables[$var] = array_merge($this->mTables[$var], $cached);
 570                         }
 571
 572                         $this->postLoadTables();
 573
 574                         if($this->lockCache()) {
 575                                 $wgMemc->set($this->mCacheKey, $this->mTables, 43200);
 576                                 $this->unlockCache();
 577                         }
 578                         wfProfileOut( __METHOD__.'-recache' );
 579                 }
 580                 if ( $this->mUseFss ) {
 581                         wfProfileIn( __METHOD__.'-fss' );
 582                         $this->generateFssObjects();
 583                         wfProfileOut( __METHOD__.'-fss' );
 584                 }
 585                 wfProfileOut( __METHOD__ );
 586         }
 587
 588         /**
 589          * Generate FSS objects. The FSS extension must be available.
 590          */
 591         function generateFssObjects() {
 592                 foreach ( $this->mTables as $variant => $table ) {
 593                         $this->mFssObjects[$variant] = fss_prep_replace( $table );
 594                 }
 595         }
 596
 597     /**
 598      * Hook for post processig after conversion tables are loaded
 599      *
 600      */
 601         function postLoadTables() {}
 602
 603     /**
 604      * Reload the conversion tables
 605      *
 606      * @private
 607      */
 608         function reloadTables() {
 609                 if($this->mTables)
 610                         unset($this->mTables);
 611                 $this->mTablesLoaded = false;
 612                 $this->loadTables(false);
 613         }
 614
 615
 616         /**
 617      * parse the conversion table stored in the cache
 618      *
 619      * the tables should be in blocks of the following form:
 620
 621      *          -{
 622      *                  word => word ;
 623      *                  word => word ;
 624      *                  ...
 625      *          }-
 626      *
 627      *  to make the tables more manageable, subpages are allowed
 628      *  and will be parsed recursively if $recursive=true
 629      *
 630      * @private
 631          */
 632         function parseCachedTable($code, $subpage='', $recursive=true) {
 633                 global $wgMessageCache;
 634                 static $parsed = array();
 635
 636                 if(!is_object($wgMessageCache))
 637                         return array();
 638
 639                 $key = 'Conversiontable/'.$code;
 640                 if($subpage)
 641                         $key .= '/' . $subpage;
 642
 643                 if(array_key_exists($key, $parsed))
 644                         return array();
 645
 646
 647                 $txt = $wgMessageCache->get( $key, true, true, true );
 648
 649                 // get all subpage links of the form
 650                 // [[MediaWiki:conversiontable/zh-xx/...|...]]
 651                 $linkhead = $this->mLangObj->getNsText(NS_MEDIAWIKI) . ':Conversiontable';
 652                 $subs = explode('[[', $txt);
 653                 $sublinks = array();
 654                 foreach( $subs as $sub ) {
 655                         $link = explode(']]', $sub, 2);
 656                         if(count($link) != 2)
 657                                 continue;
 658                         $b = explode('|', $link[0]);
 659                         $b = explode('/', trim($b[0]), 3);
 660                         if(count($b)==3)
 661                                 $sublink = $b[2];
 662                         else
 663                                 $sublink = '';
 664
 665                         if($b[0] == $linkhead && $b[1] == $code) {
 666                                 $sublinks[] = $sublink;
 667                         }
 668                 }
 669
 670
 671                 // parse the mappings in this page
 672                 $blocks = explode($this->mMarkup['begin'], $txt);
 673                 array_shift($blocks);
 674                 $ret = array();
 675                 foreach($blocks as $block) {
 676                         $mappings = explode($this->mMarkup['end'], $block, 2);
 677                         $stripped = str_replace(array("'", '"', '*','#'), '', $mappings[0]);
 678                         $table = explode( ';', $stripped );
 679                         foreach( $table as $t ) {
 680                                 $m = explode( '=>', $t );
 681                                 if( count( $m ) != 2)
 682                                         continue;
 683                                 // trim any trailling comments starting with '//'
 684                                 $tt = explode('//', $m[1], 2);
 685                                 $ret[trim($m[0])] = trim($tt[0]);
 686                         }
 687                 }
 688                 $parsed[$key] = true;
 689
 690
 691                 // recursively parse the subpages
 692                 if($recursive) {
 693                         foreach($sublinks as $link) {
 694                                 $s = $this->parseCachedTable($code, $link, $recursive);
 695                                 $ret = array_merge($ret, $s);
 696                         }
 697                 }
 698
 699                 if ($this->mUcfirst) {
 700                         foreach ($ret as $k => $v) {
 701                                 $ret[Language::ucfirst($k)] = Language::ucfirst($v);
 702                         }
 703                 }
 704                 return $ret;
 705         }
 706
 707         /**
 708          * Enclose a string with the "no conversion" tag. This is used by
 709          * various functions in the Parser
 710          *
 711          * @param string $text text to be tagged for no conversion
 712          * @return string the tagged text
 713         */
 714         function markNoConversion($text, $noParse=false) {
 715                 # don't mark if already marked
 716                 if(strpos($text, $this->mMarkup['begin']) ||
 717                    strpos($text, $this->mMarkup['end']))
 718                         return $text;
 719
 720                 $ret = $this->mMarkup['begin'] . $text . $this->mMarkup['end'];
 721                 return $ret;
 722         }
 723
 724         /**
 725          * convert the sorting key for category links. this should make different
 726          * keys that are variants of each other map to the same key
 727         */
 728         function convertCategoryKey( $key ) {
 729                 return $key;
 730         }
 731         /**
 732      * hook to refresh the cache of conversion tables when
 733      * MediaWiki:conversiontable* is updated
 734      * @private
 735         */
 736         function OnArticleSaveComplete($article, $user, $text, $summary, $isminor, $iswatch, $section) {
 737                 $titleobj = $article->getTitle();
 738                 if($titleobj->getNamespace() == NS_MEDIAWIKI) {
 739             /*
 740                         global $wgContLang; // should be an LanguageZh.
 741                         if(get_class($wgContLang) != 'languagezh')
 742                                 return true;
 743             */
 744                         $title = $titleobj->getDBkey();
 745                         $t = explode('/', $title, 3);
 746                         $c = count($t);
 747                         if( $c > 1 && $t[0] == 'Conversiontable' ) {
 748                                 if(in_array($t[1], $this->mVariants)) {
 749                                         $this->reloadTables();
 750                                 }
 751                         }
 752                 }
 753                 return true;
 754         }
 755
 756         function setNoTitleConvert(){
 757                 $this->mNoTitleConvert = true;
 758         }
 759
 760 }
 761
 762 ?>