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' );
  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
 169                 $reg = '/'.$codefix.'<[^>]+>|&[a-zA-Z#][a-z0-9]+;' . $marker . $htmlfix . '/s';
 170
 171                 $matches = preg_split($reg, $text, -1, PREG_SPLIT_OFFSET_CAPTURE);
 172
 173                 $m = array_shift($matches);
 174
 175                 $ret = $this->translate($m[0], $toVariant);
 176                 $mstart = $m[1]+strlen($m[0]);
 177                 foreach($matches as $m) {
 178                         $ret .= substr($text, $mstart, $m[1]-$mstart);
 179                         $ret .= $this->translate($m[0], $toVariant);
 180                         $mstart = $m[1] + strlen($m[0]);
 181                 }
 182                 wfProfileOut( $fname );
 183                 return $ret;
 184         }
 185
 186         /**
 187          * Translate a string to a variant
 188          * Doesn't process markup or do any of that other stuff, for that use convert()
 189          *
 190          * @param string $text Text to convert
 191          * @param string $variant Variant language code
 192          * @return string Translated text
 193          */
 194         function translate( $text, $variant ) {
 195                 wfProfileIn( __METHOD__ );
 196                 if( !$this->mTablesLoaded )
 197                         $this->loadTables();
 198                 $text = $this->mTables[$variant]->replace( $text );
 199                 wfProfileOut( __METHOD__ );
 200                 return $text;
 201         }
 202
 203         /**
 204      * convert text to all supported variants
 205      *
 206      * @param string $text the text to be converted
 207      * @return array of string
 208      * @public
 209      */
 210         function autoConvertToAllVariants($text) {
 211                 $fname="LanguageConverter::autoConvertToAllVariants";
 212                 wfProfileIn( $fname );
 213                 if( !$this->mTablesLoaded )
 214                         $this->loadTables();
 215
 216                 $ret = array();
 217                 foreach($this->mVariants as $variant) {
 218                         $ret[$variant] = $this->translate($text, $variant);
 219                 }
 220
 221                 wfProfileOut( $fname );
 222                 return $ret;
 223         }
 224
 225         /**
 226      * convert link text to all supported variants
 227      *
 228      * @param string $text the text to be converted
 229      * @return array of string
 230      * @public
 231      */
 232         function convertLinkToAllVariants($text) {
 233                 if( !$this->mTablesLoaded )
 234                         $this->loadTables();
 235
 236                 $ret = array();
 237                 $tarray = explode($this->mMarkup['begin'], $text);
 238                 $tfirst = array_shift($tarray);
 239
 240                 foreach($this->mVariants as $variant)
 241                         $ret[$variant] = $this->translate($tfirst,$variant);
 242
 243                 foreach($tarray as $txt) {
 244                         $marked = explode($this->mMarkup['end'], $txt, 2);
 245
 246                         foreach($this->mVariants as $variant){
 247                                 $ret[$variant] .= $this->mMarkup['begin'].$marked[0].$this->mMarkup['end'];
 248                                 if(array_key_exists(1, $marked))
 249                                         $ret[$variant] .= $this->translate($marked[1],$variant);
 250                         }
 251
 252                 }
 253
 254                 return $ret;
 255         }
 256
 257
 258         /**
 259          * Convert text using a parser object for context
 260          */
 261         function parserConvert( $text, &$parser ) {
 262                 global $wgDisableLangConversion;
 263                 /* don't do anything if this is the conversion table */
 264                 if ( $parser->mTitle->getNamespace() == NS_MEDIAWIKI &&
 265                                  strpos($parser->mTitle->getText(), "Conversiontable") !== false )
 266                 {
 267                         return $text;
 268                 }
 269
 270                 if($wgDisableLangConversion)
 271                         return $text;
 272
 273                 $text = $this->convert( $text );
 274                 $parser->mOutput->setTitleText( $this->mTitleDisplay );
 275                 return $text;
 276         }
 277
 278         /**
 279          * convert text to different variants of a language. the automatic
 280          * conversion is done in autoConvert(). here we parse the text
 281          * marked with -{}-, which specifies special conversions of the
 282          * text that can not be accomplished in autoConvert()
 283          *
 284          * syntax of the markup:
 285          * -{code1:text1;code2:text2;...}-  or
 286          * -{text}- in which case no conversion should take place for text
 287      *
 288      * @param string $text text to be converted
 289      * @param bool $isTitle whether this conversion is for the article title
 290      * @return string converted text
 291      * @access public
 292      */
 293         function convert( $text , $isTitle=false) {
 294                 $mw =& MagicWord::get( 'notitleconvert'   );
 295                 if( $mw->matchAndRemove( $text ) )
 296                         $this->mDoTitleConvert = false;
 297
 298                 $mw =& MagicWord::get( 'nocontentconvert'   );
 299                 if( $mw->matchAndRemove( $text ) ) {
 300                         $this->mDoContentConvert = false;
 301                 }
 302
 303                 // no conversion if redirecting
 304                 $mw =& MagicWord::get( 'redirect'   );
 305                 if( $mw->matchStart( $text ))
 306                         return $text;
 307
 308                 if( $isTitle ) {
 309                         if( !$this->mDoTitleConvert ) {
 310                                 $this->mTitleDisplay = $text;
 311                                 return $text;
 312                         }
 313
 314                         global $wgRequest;
 315                         $isredir = $wgRequest->getText( 'redirect', 'yes' );
 316                         $action = $wgRequest->getText( 'action' );
 317                         if ( $isredir == 'no' || $action == 'edit' ) {
 318                                 return $text;
 319                         }
 320                         else {
 321                                 $this->mTitleDisplay = $this->convert($text);
 322                                 return $this->mTitleDisplay;
 323                         }
 324                 }
 325
 326                 if( !$this->mDoContentConvert )
 327                         return $text;
 328
 329                 $plang = $this->getPreferredVariant();
 330                 if( isset( $this->mVariantFallbacks[$plang] ) ) {
 331                         $fallback = $this->mVariantFallbacks[$plang];
 332                 } else {
 333                         // This sounds... bad?
 334                         $fallback = '';
 335                 }
 336
 337                 $tarray = explode($this->mMarkup['begin'], $text);
 338                 $tfirst = array_shift($tarray);
 339                 $text = $this->autoConvert($tfirst);
 340                 foreach($tarray as $txt) {
 341                         $marked = explode($this->mMarkup['end'], $txt, 2);
 342                         $flags = array();
 343                         $tt = explode($this->mMarkup['flagsep'], $marked[0], 2);
 344
 345                         if(sizeof($tt) == 2) {
 346                                 $f = explode($this->mMarkup['varsep'], $tt[0]);
 347                                 foreach($f as $ff) {
 348                                         $ff = trim($ff);
 349                                         if(array_key_exists($ff, $this->mFlags) &&
 350                                                 !array_key_exists($this->mFlags[$ff], $flags))
 351                                                 $flags[] = $this->mFlags[$ff];
 352                                 }
 353                                 $rules = $tt[1];
 354                         }
 355                         else
 356                                 $rules = $marked[0];
 357
 358                         //FIXME: may cause trouble here...
 359                         //strip &nbsp; since it interferes with the parsing, plus,
 360                         //all spaces should be stripped in this tag anyway.
 361                         $rules = str_replace('&nbsp;', '', $rules);
 362
 363                         $carray = $this->parseManualRule($rules, $flags);
 364                         $disp = '';
 365                         if(array_key_exists($plang, $carray))
 366                                 $disp = $carray[$plang];
 367                         else if(array_key_exists($fallback, $carray))
 368                                 $disp = $carray[$fallback];
 369                         if($disp) {
 370                                 if(in_array('T',  $flags))
 371                                         $this->mTitleDisplay = $disp;
 372                                 else
 373                                         $text .= $disp;
 374
 375                                 if(in_array('A', $flags)) {
 376                                         /* modify the conversion table for this session*/
 377
 378                                         /* fill in the missing variants, if any,
 379                                             with fallbacks */
 380                                         foreach($this->mVariants as $v) {
 381                                                 if(!array_key_exists($v, $carray)) {
 382                                                         $vf = $this->getVariantFallback($v);
 383                                                         if(array_key_exists($vf, $carray))
 384                                                                 $carray[$v] = $carray[$vf];
 385                                                 }
 386                                         }
 387
 388                                         foreach($this->mVariants as $vfrom) {
 389                                                 if(!array_key_exists($vfrom, $carray))
 390                                                         continue;
 391                                                 foreach($this->mVariants as $vto) {
 392                                                         if($vfrom == $vto)
 393                                                                 continue;
 394                                                         if(!array_key_exists($vto, $carray))
 395                                                                 continue;
 396                                                         $this->mTables[$vto]->setPair($carray[$vfrom], $carray[$vto]);
 397                                                 }
 398                                         }
 399                                 }
 400                         }
 401                         else {
 402                                 $text .= $marked[0];
 403                         }
 404                         if(array_key_exists(1, $marked))
 405                                 $text .= $this->autoConvert($marked[1]);
 406                 }
 407
 408                 return $text;
 409         }
 410
 411         /**
 412          * parse the manually marked conversion rule
 413          * @param string $rule the text of the rule
 414          * @return array of the translation in each variant
 415          * @private
 416          */
 417         function parseManualRule($rules, $flags=array()) {
 418
 419                 $choice = explode($this->mMarkup['varsep'], $rules);
 420                 $carray = array();
 421                 if(sizeof($choice) == 1) {
 422                         /* a single choice */
 423                         foreach($this->mVariants as $v)
 424                                 $carray[$v] = $choice[0];
 425                 }
 426                 else {
 427                         foreach($choice as $c) {
 428                                 $v = explode($this->mMarkup['codesep'], $c);
 429                                 if(sizeof($v) != 2) // syntax error, skip
 430                                         continue;
 431                                 $carray[trim($v[0])] = trim($v[1]);
 432                         }
 433                 }
 434                 return $carray;
 435         }
 436
 437         /**
 438          * if a language supports multiple variants, it is
 439          * possible that non-existing link in one variant
 440          * actually exists in another variant. this function
 441          * tries to find it. See e.g. LanguageZh.php
 442          *
 443          * @param string $link the name of the link
 444          * @param mixed $nt the title object of the link
 445          * @return null the input parameters may be modified upon return
 446      * @access public
 447          */
 448         function findVariantLink( &$link, &$nt ) {
 449                 global $wgDisableLangConversion;
 450                 $linkBatch = new LinkBatch();
 451
 452                 $ns=NS_MAIN;
 453
 454                 if(is_object($nt))
 455                         $ns = $nt->getNamespace();
 456
 457                 $variants = $this->autoConvertToAllVariants($link);
 458                 if($variants == false) //give up
 459                         return;
 460
 461                 $titles = array();
 462
 463                 foreach( $variants as $v ) {
 464                         if($v != $link){
 465                                 $varnt = Title::newFromText( $v, $ns );
 466                                 if(!is_null($varnt)){
 467                                         $linkBatch->addObj($varnt);
 468                                         $titles[]=$varnt;
 469                                 }
 470                         }
 471                 }
 472
 473                 // fetch all variants in single query
 474                 $linkBatch->execute();
 475
 476                 foreach( $titles as $varnt ) {
 477                         if( $varnt->getArticleID() > 0 ) {
 478                                 $nt = $varnt;
 479                                 if( !$wgDisableLangConversion )
 480                                         $link = $v;
 481                                 break;
 482                         }
 483                 }
 484         }
 485
 486     /**
 487      * returns language specific hash options
 488      *
 489      * @access public
 490      */
 491         function getExtraHashOptions() {
 492                 $variant = $this->getPreferredVariant();
 493                 return '!' . $variant ;
 494         }
 495
 496     /**
 497      * get title text as defined in the body of the article text
 498      *
 499      * @access public
 500      */
 501         function getParsedTitle() {
 502                 return $this->mTitleDisplay;
 503         }
 504
 505         /**
 506      * a write lock to the cache
 507      *
 508      * @private
 509      */
 510         function lockCache() {
 511                 global $wgMemc;
 512                 $success = false;
 513                 for($i=0; $i<30; $i++) {
 514                         if($success = $wgMemc->add($this->mCacheKey . "lock", 1, 10))
 515                                 break;
 516                         sleep(1);
 517                 }
 518                 return $success;
 519         }
 520
 521         /**
 522      * unlock cache
 523      *
 524      * @private
 525      */
 526         function unlockCache() {
 527                 global $wgMemc;
 528                 $wgMemc->delete($this->mCacheKey . "lock");
 529         }
 530
 531
 532         /**
 533      * Load default conversion tables
 534      * This method must be implemented in derived class
 535      *
 536      * @private
 537      */
 538         function loadDefaultTables() {
 539                 $name = get_class($this);
 540                 wfDie("Must implement loadDefaultTables() method in class $name");
 541         }
 542
 543         /**
 544      * load conversion tables either from the cache or the disk
 545      * @private
 546      */
 547         function loadTables($fromcache=true) {
 548                 global $wgMemc;
 549                 if( $this->mTablesLoaded )
 550                         return;
 551                 wfProfileIn( __METHOD__ );
 552                 $this->mTablesLoaded = true;
 553                 $this->mTables = false;
 554                 if($fromcache) {
 555                         wfProfileIn( __METHOD__.'-cache' );
 556                         $this->mTables = $wgMemc->get( $this->mCacheKey );
 557                         wfProfileOut( __METHOD__.'-cache' );
 558                 }
 559                 if ( !$this->mTables || !isset( $this->mTables['VERSION 2'] ) ) {
 560                         wfProfileIn( __METHOD__.'-recache' );
 561                         // not in cache, or we need a fresh reload.
 562                         // we will first load the default tables
 563                         // then update them using things in MediaWiki:Zhconversiontable/*
 564                         global $wgMessageCache;
 565                         $this->loadDefaultTables();
 566                         foreach($this->mVariants as $var) {
 567                                 $cached = $this->parseCachedTable($var);
 568                                 $this->mTables[$var]->mergeArray($cached);
 569                         }
 570
 571                         $this->postLoadTables();
 572                         $this->mTables['VERSION 2'] = true;
 573
 574                         if($this->lockCache()) {
 575                                 $wgMemc->set($this->mCacheKey, $this->mTables, 43200);
 576                                 $this->unlockCache();
 577                         }
 578                         wfProfileOut( __METHOD__.'-recache' );
 579                 }
 580                 wfProfileOut( __METHOD__ );
 581         }
 582
 583     /**
 584      * Hook for post processig after conversion tables are loaded
 585      *
 586      */
 587         function postLoadTables() {}
 588
 589     /**
 590      * Reload the conversion tables
 591      *
 592      * @private
 593      */
 594         function reloadTables() {
 595                 if($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                                         $this->reloadTables();
 736                                 }
 737                         }
 738                 }
 739                 return true;
 740         }
 741
 742         /**
 743          * Armour rendered math against conversion
 744          * Default is do nothing, since the process can interfere with
 745          * parseManualRule() if format -{ alter1 ; alter2 }- is enabled
 746          */
 747         function armourMath($text){
 748                 return $text;
 749         }
 750
 751
 752 }
 753
 754 ?>