languages/LanguageConverter.php

   1 <?php
   2
   3 /**
   4  * Contains the LanguageConverter class and ConverterRule class
   5  * @ingroup Language
   6  *
   7  * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License
   8  * @file
   9  */
  10
  11 /**
  12  * Base class for language conversion.
  13  * @ingroup Language
  14  *
  15  * @author Zhengzhu Feng <zhengzhu@gmail.com>
  16  * @maintainers fdcn <fdcn64@gmail.com>, shinjiman <shinjiman@gmail.com>, PhiLiP <philip.npc@gmail.com>
  17  */
  18 class LanguageConverter {
  19         var $mMainLanguageCode;
  20         var $mVariants, $mVariantFallbacks, $mVariantNames;
  21         var $mTablesLoaded = false;
  22         var $mTables;
  23         var $mNamespaceTables;
  24         // 'bidirectional' 'unidirectional' 'disable' for each variant
  25         var $mManualLevel;
  26         var $mCacheKey;
  27         var $mLangObj;
  28         var $mFlags;
  29         var $mDescCodeSep = ':', $mDescVarSep = ';';
  30         var $mUcfirst = false;
  31         var $mConvRuleTitle = false;
  32         var $mURLVariant;
  33         var $mUserVariant;
  34         var $mHeaderVariant;
  35         var $mMaxDepth = 10;
  36         var $mVarSeparatorPattern;
  37
  38         const CACHE_VERSION_KEY = 'VERSION 6';
  39
  40         /**
  41          * Constructor
  42          *
  43          * @param $langobj The Language Object
  44          * @param $maincode String: the main language code of this language
  45          * @param $variants Array: the supported variants of this language
  46          * @param $variantfallbacks Array: the fallback language of each variant
  47          * @param $flags Array: defining the custom strings that maps to the flags
  48          * @param $manualLevel Array: limit for supported variants
  49          */
  50         public function __construct( $langobj, $maincode,
  51                                                                 $variants = array(),
  52                                                                 $variantfallbacks = array(),
  53                                                                 $flags = array(),
  54                                                                 $manualLevel = array() ) {
  55                 $this->mLangObj = $langobj;
  56                 $this->mMainLanguageCode = $maincode;
  57
  58                 global $wgDisabledVariants;
  59                 $this->mVariants = array();
  60                 foreach ( $variants as $variant ) {
  61                         if ( !in_array( $variant, $wgDisabledVariants ) ) {
  62                                 $this->mVariants[] = $variant;
  63                         }
  64                 }
  65                 $this->mVariantFallbacks = $variantfallbacks;
  66                 global $wgLanguageNames;
  67                 $this->mVariantNames = $wgLanguageNames;
  68                 $this->mCacheKey = wfMemcKey( 'conversiontables', $maincode );
  69                 $f = array(
  70                         // 'S' show converted text
  71                         // '+' add rules for alltext
  72                         // 'E' the gave flags is error
  73                         // these flags above are reserved for program
  74                         'A' => 'A',       // add rule for convert code (all text convert)
  75                         'T' => 'T',       // title convert
  76                         'R' => 'R',       // raw content
  77                         'D' => 'D',       // convert description (subclass implement)
  78                         '-' => '-',       // remove convert (not implement)
  79                         'H' => 'H',       // add rule for convert code
  80                                       // (but no display in placed code )
  81                         'N' => 'N'        // current variant name
  82                 );
  83                 $this->mFlags = array_merge( $f, $flags );
  84                 foreach ( $this->mVariants as $v ) {
  85                         if ( array_key_exists( $v, $manualLevel ) ) {
  86                                 $this->mManualLevel[$v] = $manualLevel[$v];
  87                         } else {
  88                                 $this->mManualLevel[$v] = 'bidirectional';
  89                         }
  90                         $this->mNamespaceTables[$v] = array();
  91                         $this->mFlags[$v] = $v;
  92                 }
  93         }
  94
  95         /**
  96          * @public
  97          */
  98         function getVariants() {
  99                 return $this->mVariants;
 100         }
 101
 102         /**
 103          * In case some variant is not defined in the markup, we need
 104          * to have some fallback. For example, in zh, normally people
 105          * will define zh-hans and zh-hant, but less so for zh-sg or zh-hk.
 106          * when zh-sg is preferred but not defined, we will pick zh-hans
 107          * in this case. Right now this is only used by zh.
 108          *
 109          * @param $v String: the language code of the variant
 110          * @return string array The code of the fallback language or false if there
 111          *                      is no fallback
 112          */
 113         public function getVariantFallbacks( $v ) {
 114                 if ( isset( $this->mVariantFallbacks[$v] ) ) {
 115                         return $this->mVariantFallbacks[$v];
 116                 }
 117                 return $this->mMainLanguageCode;
 118         }
 119
 120         /**
 121          * Get the title produced by the conversion rule.
 122          * @returns String
 123          */
 124         function getConvRuleTitle() {
 125                 return $this->mConvRuleTitle;
 126         }
 127
 128         /**
 129          * Get preferred language variants.
 130          * @param $fromUser Boolean: get it from $wgUser's preferences
 131          * @param $fromHeader Boolean: get it from Accept-Language
 132          * @return String: the preferred language code
 133          */
 134         public function getPreferredVariant( $fromUser = true, $fromHeader = false ) {
 135                 global $wgDefaultLanguageVariant;
 136
 137                 $req = $this->getURLVariant();
 138
 139                 if ( $fromUser && !$req ) {
 140                         $req = $this->getUserVariant();
 141                 }
 142
 143                 if ( $fromHeader && !$req ) {
 144                         $req = $this->getHeaderVariant();
 145                 }
 146
 147                 if ( $wgDefaultLanguageVariant && !$req ) {
 148                         $req = $this->validateVariant( $wgDefaultLanguageVariant );
 149                 }
 150
 151                 // This function, unlike the other get*Variant functions, is
 152                 // not memoized (i.e. there return value is not cached) since
 153                 // new information might appear during processing after this
 154                 // is first called.
 155                 if ( $req ) {
 156                         return $req;
 157                 }
 158                 return $this->mMainLanguageCode;
 159         }
 160
 161         /**
 162          * Validate the variant
 163          * @param $v String: the variant to validate
 164          * @return Mixed: returns the variant if it is valid, null otherwise
 165          */
 166         function validateVariant( $v = null ) {
 167                 if ( $v !== null && in_array( $v, $this->mVariants ) ) {
 168                         return $v;
 169                 }
 170                 return null;
 171         }
 172
 173         /**
 174          * Get the variant specified in the URL
 175          *
 176          * @return Mixed: variant if one found, false otherwise.
 177          */
 178         function getURLVariant() {
 179                 global $wgRequest;
 180                 $ret = null;
 181
 182                 if ( $this->mURLVariant ) {
 183                         return $this->mURLVariant;
 184                 }
 185
 186                 // see if the preference is set in the request
 187                 $ret = $wgRequest->getText( 'variant' );
 188
 189                 if ( !$ret ) {
 190                         $ret = $wgRequest->getVal( 'uselang' );
 191                 }
 192
 193                 return $this->mURLVariant = $this->validateVariant( $ret );
 194         }
 195
 196         /**
 197          * Determine if the user has a variant set.
 198          *
 199          * @return Mixed: variant if one found, false otherwise.
 200          */
 201         function getUserVariant() {
 202                 global $wgUser;
 203                 $ret = null;
 204
 205                 // memoizing this function wreaks havoc on parserTest.php
 206                 /* if ( $this->mUserVariant ) { */
 207                 /*      return $this->mUserVariant; */
 208                 /* } */
 209
 210                 // get language variant preference from logged in users
 211                 // Don't call this on stub objects because that causes infinite
 212                 // recursion during initialisation
 213                 if ( $wgUser->isLoggedIn() )  {
 214                         $ret = $wgUser->getOption( 'variant' );
 215                 }
 216                 else {
 217                         // figure out user lang without constructing wgLang to avoid
 218                         // infinite recursion
 219                         $ret = $wgUser->getOption( 'language' );
 220                 }
 221
 222                 return $this->mUserVariant = $this->validateVariant( $ret );
 223         }
 224
 225
 226         /**
 227          * Determine the language variant from the Accept-Language header.
 228          *
 229          * @return Mixed: variant if one found, false otherwise.
 230          */
 231         function getHeaderVariant() {
 232                 global $wgRequest;
 233                 $ret = null;
 234
 235                 if ( $this->mHeaderVariant ) {
 236                         return $this->mHeaderVariant;
 237                 }
 238
 239                 // see if some supported language variant is set in the
 240                 // http header.
 241
 242                 $acceptLanguage = $wgRequest->getHeader( 'Accept-Language' );
 243                 if ( !$acceptLanguage ) {
 244                         return null;
 245                 }
 246
 247                 // explode by comma
 248                 $result = StringUtils::explode( ',', strtolower( $acceptLanguage ) );
 249                 $languages = array();
 250
 251                 foreach ( $result as $elem ) {
 252                         // if $elem likes 'zh-cn;q=0.9'
 253                         if ( ( $posi = strpos( $elem, ';' ) ) !== false ) {
 254                                 // get the real language code likes 'zh-cn'
 255                                 $languages[] = substr( $elem, 0, $posi );
 256                         } else {
 257                                 $languages[] = $elem;
 258                         }
 259                 }
 260
 261                 $fallback_languages = array();
 262                 foreach ( $languages as $language ) {
 263                         // strip whitespace
 264                         $language = trim( $language );
 265                         $this->mHeaderVariant = $this->validateVariant( $language );
 266                         if ( $this->mHeaderVariant ) {
 267                                 break;
 268                         }
 269
 270                         // To see if there are fallbacks of current language.
 271                         // We record these fallback variants, and process
 272                         // them later.
 273                         $fallbacks = $this->getVariantFallbacks( $language );
 274                         if ( is_string( $fallbacks ) ) {
 275                                 $fallback_languages[] = $fallbacks;
 276                         } elseif ( is_array( $fallbacks ) ) {
 277                                 $fallback_languages =
 278                                         array_merge( $fallback_languages,
 279                                                                  $fallbacks );
 280                         }
 281                 }
 282
 283                 if ( !$this->mHeaderVariant ) {
 284                         // process fallback languages now
 285                         $fallback_languages = array_unique( $fallback_languages );
 286                         foreach ( $fallback_languages as $language ) {
 287                                 $this->mHeaderVariant = $this->validateVariant( $language );
 288                                 if ( $this->mHeaderVariant ) {
 289                                         break;
 290                                 }
 291                         }
 292                 }
 293
 294                 return $this->mHeaderVariant;
 295         }
 296
 297         /**
 298          * Caption convert, base on preg_replace_callback.
 299          *
 300          * To convert text in "title" or "alt", like '<img alt="text" ... '
 301          * or '<span title="text" ... '
 302          *
 303          * @return String like ' alt="yyyy"' or ' title="yyyy"'
 304          * @private
 305          */
 306         function captionConvert( $matches ) {
 307                 $toVariant = $this->getPreferredVariant();
 308                 $title = $matches[1];
 309                 $text  = $matches[2];
 310                 // we convert captions except URL
 311                 if ( !strpos( $text, '://' ) ) {
 312                         $text = $this->translate( $text, $toVariant );
 313                 }
 314                 return " $title=\"$text\"";
 315         }
 316
 317         /**
 318          * Dictionary-based conversion.
 319          *
 320          * @param $text String: the text to be converted
 321          * @param $toVariant String: the target language code
 322          * @return String: the converted text
 323          * @private
 324          */
 325         function autoConvert( $text, $toVariant = false ) {
 326                 $fname = 'LanguageConverter::autoConvert';
 327
 328                 wfProfileIn( $fname );
 329
 330                 if ( !$this->mTablesLoaded ) {
 331                         $this->loadTables();
 332                 }
 333
 334                 if ( !$toVariant ) {
 335                         $toVariant = $this->getPreferredVariant();
 336                         if ( !$toVariant ) {
 337                                 return $text;
 338                         }
 339                 }
 340
 341                 /* we convert everything except:
 342                    1. html markups (anything between < and >)
 343                    2. html entities
 344                    3. place holders created by the parser
 345                 */
 346                 global $wgParser;
 347                 if ( isset( $wgParser ) && $wgParser->UniqPrefix() != '' ) {
 348                         $marker = '|' . $wgParser->UniqPrefix() . '[\-a-zA-Z0-9]+';
 349                 } else {
 350                         $marker = '';
 351                 }
 352
 353                 // this one is needed when the text is inside an html markup
 354                 $htmlfix = '|<[^>]+$|^[^<>]*>';
 355
 356                 // disable convert to variants between <code></code> tags
 357                 $codefix = '<code>.+?<\/code>|';
 358                 // disable convertsion of <script type="text/javascript"> ... </script>
 359                 $scriptfix = '<script.*?>.*?<\/script>|';
 360                 // disable conversion of <pre xxxx> ... </pre>
 361                 $prefix = '<pre.*?>.*?<\/pre>|';
 362
 363                 $reg = '/' . $codefix . $scriptfix . $prefix .
 364                         '<[^>]+>|&[a-zA-Z#][a-z0-9]+;' . $marker . $htmlfix . '/s';
 365
 366                 $matches = preg_split( $reg, $text, - 1, PREG_SPLIT_OFFSET_CAPTURE );
 367
 368                 $m = array_shift( $matches );
 369
 370                 $ret = $this->translate( $m[0], $toVariant );
 371                 $mstart = $m[1] + strlen( $m[0] );
 372
 373                 // enable convertsion of '<img alt="xxxx" ... '
 374                 // or '<span title="xxxx" ... '
 375                 $captionpattern  = '/\s(title|alt)\s*=\s*"([\s\S]*?)"/';
 376
 377                 $trtext = '';
 378                 $trtextmark = "\0";
 379                 $notrtext = array();
 380                 foreach ( $matches as $m ) {
 381                         $mark = substr( $text, $mstart, $m[1] - $mstart );
 382                         $mark = preg_replace_callback( $captionpattern,
 383                                                                                    array( &$this, 'captionConvert' ),
 384                                                                                    $mark );
 385                         // Let's convert the trtext only once,
 386                         // it would give us more performance improvement
 387                         $notrtext[] = $mark;
 388                         $trtext .= $m[0] . $trtextmark;
 389                         $mstart = $m[1] + strlen( $m[0] );
 390                 }
 391                 $notrtext[] = '';
 392                 $trtext = $this->translate( $trtext, $toVariant );
 393                 $trtext = StringUtils::explode( $trtextmark, $trtext );
 394                 foreach ( $trtext as $t ) {
 395                         $ret .= array_shift( $notrtext );
 396                         $ret .= $t;
 397                 }
 398                 wfProfileOut( $fname );
 399                 return $ret;
 400         }
 401
 402         /**
 403          * Translate a string to a variant.
 404          * Doesn't process markup or do any of that other stuff, for that use
 405          * convert().
 406          *
 407          * @param $text String: text to convert
 408          * @param $variant String: variant language code
 409          * @return String: translated text
 410          * @private
 411          */
 412         function translate( $text, $variant ) {
 413                 wfProfileIn( __METHOD__ );
 414                 // If $text is empty or only includes spaces, do nothing
 415                 // Otherwise translate it
 416                 if ( trim( $text ) ) {
 417                         if ( !$this->mTablesLoaded ) {
 418                                 $this->loadTables();
 419                         }
 420                         $text = $this->mTables[$variant]->replace( $text );
 421                 }
 422                 wfProfileOut( __METHOD__ );
 423                 return $text;
 424         }
 425
 426         /**
 427          * Convert text to all supported variants.
 428          *
 429          * @param $text String: the text to be converted
 430          * @return Array of string
 431          */
 432         public function autoConvertToAllVariants( $text ) {
 433                 $fname = 'LanguageConverter::autoConvertToAllVariants';
 434                 wfProfileIn( $fname );
 435                 if ( !$this->mTablesLoaded ) {
 436                         $this->loadTables();
 437                 }
 438
 439                 $ret = array();
 440                 foreach ( $this->mVariants as $variant ) {
 441                         $ret[$variant] = $this->translate( $text, $variant );
 442                 }
 443
 444                 wfProfileOut( $fname );
 445                 return $ret;
 446         }
 447
 448         /**
 449          * Convert link text to all supported variants.
 450          *
 451          * @param $text String: the text to be converted
 452          * @return Array of string
 453          */
 454         public function convertLinkToAllVariants( $text ) {
 455                 if ( !$this->mTablesLoaded ) {
 456                         $this->loadTables();
 457                 }
 458
 459                 $ret = array();
 460                 $tarray = StringUtils::explode( '-{', $text );
 461                 $first = true;
 462
 463                 foreach ( $tarray as $txt ) {
 464                         if ( $first ) {
 465                                 $first = false;
 466                                 foreach ( $this->mVariants as $variant ) {
 467                                         $ret[$variant] = $this->translate( $txt, $variant );
 468                                 }
 469                                 continue;
 470                         }
 471
 472                         $marked = explode( '}-', $txt, 2 );
 473
 474                         foreach ( $this->mVariants as $variant ) {
 475                                 $ret[$variant] .= '-{' . $marked[0] . '}-';
 476                                 if ( array_key_exists( 1, $marked ) ) {
 477                                         $ret[$variant] .= $this->translate( $marked[1], $variant );
 478                                 }
 479                         }
 480
 481                 }
 482
 483                 return $ret;
 484         }
 485
 486         /**
 487          * Prepare manual conversion table.
 488          * @private
 489          */
 490         function applyManualConv( $convRule ) {
 491                 // use syntax -{T|zh:TitleZh;zh-tw:TitleTw}- for custom
 492                 // conversion in title
 493                 $this->mConvRuleTitle = $convRule->getTitle();
 494
 495                 // apply manual conversion table to global table
 496                 $convTable = $convRule->getConvTable();
 497                 $action = $convRule->getRulesAction();
 498                 foreach ( $convTable as $variant => $pair ) {
 499                         if ( !$this->validateVariant( $variant ) ) {
 500                                 continue;
 501                         }
 502
 503                         if ( $action == 'add' ) {
 504                                 foreach ( $pair as $from => $to ) {
 505                                         // to ensure that $from and $to not be left blank
 506                                         // so $this->translate() could always return a string
 507                                         if ( $from || $to ) {
 508                                                 // more efficient than array_merge(), about 2.5 times.
 509                                                 $this->mTables[$variant]->setPair( $from, $to );
 510                                         }
 511                                 }
 512                         } elseif ( $action == 'remove' ) {
 513                                 $this->mTables[$variant]->removeArray( $pair );
 514                         }
 515                 }
 516         }
 517
 518         /**
 519          * Convert namespace.
 520          * @param $title String: the title included namespace
 521          * @return Array of string
 522          * @private
 523          */
 524         function convertNamespace( $title, $variant ) {
 525                 $splittitle = explode( ':', $title, 2 );
 526                 if ( count( $splittitle ) < 2 ) {
 527                         return $title;
 528                 }
 529                 if ( isset( $this->mNamespaceTables[$variant][$splittitle[0]] ) ) {
 530                         $splittitle[0] = $this->mNamespaceTables[$variant][$splittitle[0]];
 531                 }
 532                 $ret = implode( ':', $splittitle );
 533                 return $ret;
 534         }
 535
 536         /**
 537          * Convert text to different variants of a language. The automatic
 538          * conversion is done in autoConvert(). Here we parse the text
 539          * marked with -{}-, which specifies special conversions of the
 540          * text that can not be accomplished in autoConvert().
 541          *
 542          * Syntax of the markup:
 543          * -{code1:text1;code2:text2;...}-  or
 544          * -{flags|code1:text1;code2:text2;...}-  or
 545          * -{text}- in which case no conversion should take place for text
 546          *
 547          * @param $text String: text to be converted
 548          * @return String: converted text
 549          */
 550         public function convert( $text ) {
 551                 global $wgDisableLangConversion;
 552                 if ( $wgDisableLangConversion ) return $text;
 553
 554                 $variant = $this->getPreferredVariant();
 555
 556                 return $this->recursiveConvertTopLevel( $text, $variant );
 557         }
 558
 559         protected function recursiveConvertTopLevel( $text, $variant, $depth = 0 ) {
 560                 $startPos = 0;
 561                 $out = '';
 562                 $length = strlen( $text );
 563                 while ( $startPos < $length ) {
 564                         $m = false;
 565                         $pos = strpos( $text, '-{', $startPos );
 566
 567                         if ( $pos === false ) {
 568                                 // No more markup, append final segment
 569                                 $out .= $this->autoConvert( substr( $text, $startPos ), $variant );
 570                                 $startPos = $length;
 571                                 return $out;
 572                         }
 573
 574                         // Markup found
 575                         // Append initial segment
 576                         $out .= $this->autoConvert( substr( $text, $startPos, $pos - $startPos ), $variant );
 577
 578                         // Advance position
 579                         $startPos = $pos;
 580
 581                         // Do recursive conversion
 582                         $out .= $this->recursiveConvertRule( $text, $variant, $startPos, $depth + 1 );
 583                 }
 584
 585                 return $out;
 586         }
 587
 588         protected function recursiveConvertRule( $text, $variant, &$startPos, $depth = 0 ) {
 589                 // Quick sanity check (no function calls)
 590                 if ( $text[$startPos] !== '-' || $text[$startPos + 1] !== '{' ) {
 591                         throw new MWException( __METHOD__.': invalid input string' );
 592                 }
 593
 594                 $startPos += 2;
 595                 $inner = '';
 596                 $warningDone = false;
 597                 $length = strlen( $text );
 598
 599                 while ( $startPos < $length ) {
 600                         $m = false;
 601                         preg_match( '/-\{|\}-/', $text, $m,  PREG_OFFSET_CAPTURE, $startPos );
 602                         if ( !$m ) {
 603                                 // Unclosed rule
 604                                 break;
 605                         }
 606
 607                         $token = $m[0][0];
 608                         $pos = $m[0][1];
 609
 610                         // Markup found
 611                         // Append initial segment
 612                         $inner .= substr( $text, $startPos, $pos - $startPos );
 613
 614                         // Advance position
 615                         $startPos = $pos;
 616
 617                         switch ( $token ) {
 618                                 case '-{':
 619                                         // Check max depth
 620                                         if ( $depth >= $this->mMaxDepth ) {
 621                                                 $inner .= '-{';
 622                                                 if ( !$warningDone ) {
 623                                                         $inner .= '<span class="error">' .
 624                                                                 wfMsgForContent( 'language-converter-depth-warning',
 625                                                                         $this->mMaxDepth ) .
 626                                                                 '</span>';
 627                                                         $warningDone = true;
 628                                                 }
 629                                                 $startPos += 2;
 630                                                 continue;
 631                                         }
 632                                         // Recursively parse another rule
 633                                         $inner .= $this->recursiveConvertRule( $text, $variant, $startPos, $depth + 1 );
 634                                         break;
 635                                 case '}-':
 636                                         // Apply the rule
 637                                         $startPos += 2;
 638                                         $rule = new ConverterRule( $inner, $this );
 639                                         $rule->parse( $variant );
 640                                         $this->applyManualConv( $rule );
 641                                         return $rule->getDisplay();
 642                                 default:
 643                                         throw new MWException( __METHOD__.': invalid regex match' );
 644                         }
 645                 }
 646
 647                 // Unclosed rule
 648                 if ( $startPos < $length ) {
 649                         $inner .= substr( $text, $startPos );
 650                 }
 651                 $startPos = $length;
 652                 return '-{' . $this->autoConvert( $inner, $variant );
 653         }
 654
 655         /**
 656          * If a language supports multiple variants, it is
 657          * possible that non-existing link in one variant
 658          * actually exists in another variant. This function
 659          * tries to find it. See e.g. LanguageZh.php
 660          *
 661          * @param $link String: the name of the link
 662          * @param $nt Mixed: the title object of the link
 663          * @param $ignoreOtherCond Boolean: to disable other conditions when
 664          *        we need to transclude a template or update a category's link
 665          * @return Null, the input parameters may be modified upon return
 666          */
 667         public function findVariantLink( &$link, &$nt, $ignoreOtherCond = false ) {
 668                 # If the article has already existed, there is no need to
 669                 # check it again, otherwise it may cause a fault.
 670                 if ( is_object( $nt ) && $nt->exists() ) {
 671                         return;
 672                 }
 673
 674                 global $wgDisableLangConversion, $wgDisableTitleConversion, $wgRequest,
 675                         $wgUser;
 676                 $isredir = $wgRequest->getText( 'redirect', 'yes' );
 677                 $action = $wgRequest->getText( 'action' );
 678                 $linkconvert = $wgRequest->getText( 'linkconvert', 'yes' );
 679                 $disableLinkConversion = $wgDisableLangConversion
 680                         || $wgDisableTitleConversion;
 681                 $linkBatch = new LinkBatch();
 682
 683                 $ns = NS_MAIN;
 684
 685                 if ( $disableLinkConversion ||
 686                          ( !$ignoreOtherCond &&
 687                            ( $isredir == 'no'
 688                                  || $action == 'edit'
 689                                  || $action == 'submit'
 690                                  || $linkconvert == 'no'
 691                                  || $wgUser->getOption( 'noconvertlink' ) == 1 ) ) ) {
 692                         return;
 693                 }
 694
 695                 if ( is_object( $nt ) ) {
 696                         $ns = $nt->getNamespace();
 697                 }
 698
 699                 $variants = $this->autoConvertToAllVariants( $link );
 700                 if ( $variants == false ) { // give up
 701                         return;
 702                 }
 703
 704                 $titles = array();
 705
 706                 foreach ( $variants as $v ) {
 707                         if ( $v != $link ) {
 708                                 $varnt = Title::newFromText( $v, $ns );
 709                                 if ( !is_null( $varnt ) ) {
 710                                         $linkBatch->addObj( $varnt );
 711                                         $titles[] = $varnt;
 712                                 }
 713                         }
 714                 }
 715
 716                 // fetch all variants in single query
 717                 $linkBatch->execute();
 718
 719                 foreach ( $titles as $varnt ) {
 720                         if ( $varnt->getArticleID() > 0 ) {
 721                                 $nt = $varnt;
 722                                 $link = $varnt->getText();
 723                                 break;
 724                         }
 725                 }
 726         }
 727
 728     /**
 729          * Returns language specific hash options.
 730          */
 731         public function getExtraHashOptions() {
 732                 $variant = $this->getPreferredVariant();
 733                 return '!' . $variant ;
 734         }
 735
 736         /**
 737          * Load default conversion tables.
 738          * This method must be implemented in derived class.
 739          *
 740          * @private
 741          */
 742         function loadDefaultTables() {
 743                 $name = get_class( $this );
 744                 wfDie( "Must implement loadDefaultTables() method in class $name" );
 745         }
 746
 747         /**
 748          * Load conversion tables either from the cache or the disk.
 749          * @private
 750          */
 751         function loadTables( $fromcache = true ) {
 752                 global $wgMemc;
 753                 if ( $this->mTablesLoaded ) {
 754                         return;
 755                 }
 756                 wfProfileIn( __METHOD__ );
 757                 $this->mTablesLoaded = true;
 758                 $this->mTables = false;
 759                 if ( $fromcache ) {
 760                         wfProfileIn( __METHOD__ . '-cache' );
 761                         $this->mTables = $wgMemc->get( $this->mCacheKey );
 762                         wfProfileOut( __METHOD__ . '-cache' );
 763                 }
 764                 if ( !$this->mTables
 765                          || !array_key_exists( self::CACHE_VERSION_KEY, $this->mTables ) ) {
 766                         wfProfileIn( __METHOD__ . '-recache' );
 767                         // not in cache, or we need a fresh reload.
 768                         // we will first load the default tables
 769                         // then update them using things in MediaWiki:Zhconversiontable/*
 770                         $this->loadDefaultTables();
 771                         foreach ( $this->mVariants as $var ) {
 772                                 $cached = $this->parseCachedTable( $var );
 773                                 $this->mTables[$var]->mergeArray( $cached );
 774                         }
 775
 776                         $this->postLoadTables();
 777                         $this->mTables[self::CACHE_VERSION_KEY] = true;
 778
 779                         $wgMemc->set( $this->mCacheKey, $this->mTables, 43200 );
 780                         wfProfileOut( __METHOD__ . '-recache' );
 781                 }
 782                 wfProfileOut( __METHOD__ );
 783         }
 784
 785     /**
 786          * Hook for post processig after conversion tables are loaded.
 787          *
 788          */
 789         function postLoadTables() { }
 790
 791     /**
 792          * Reload the conversion tables.
 793          *
 794          * @private
 795          */
 796         function reloadTables() {
 797                 if ( $this->mTables ) {
 798                         unset( $this->mTables );
 799                 }
 800                 $this->mTablesLoaded = false;
 801                 $this->loadTables( false );
 802         }
 803
 804
 805         /**
 806          * Parse the conversion table stored in the cache.
 807          *
 808          * The tables should be in blocks of the following form:
 809          *              -{
 810          *                      word => word ;
 811          *                      word => word ;
 812          *                      ...
 813          *              }-
 814          *
 815          *      To make the tables more manageable, subpages are allowed
 816          *      and will be parsed recursively if $recursive == true.
 817          *
 818          */
 819         function parseCachedTable( $code, $subpage = '', $recursive = true ) {
 820                 global $wgMessageCache;
 821                 static $parsed = array();
 822
 823                 if ( !is_object( $wgMessageCache ) ) {
 824                         return array();
 825                 }
 826
 827                 $key = 'Conversiontable/' . $code;
 828                 if ( $subpage ) {
 829                         $key .= '/' . $subpage;
 830                 }
 831                 if ( array_key_exists( $key, $parsed ) ) {
 832                         return array();
 833                 }
 834
 835                 if ( strpos( $code, '/' ) === false ) {
 836                         $txt = $wgMessageCache->get( 'Conversiontable', true, $code );
 837                         if( $txt === false ){
 838                                 # FIXME: this method doesn't seem to be expecting
 839                                 # this possible outcome...
 840                                 $txt = '&lt;Conversiontable&gt;';
 841                         }
 842                 } else {
 843                         $title = Title::makeTitleSafe( NS_MEDIAWIKI,
 844                                                                                    "Conversiontable/$code" );
 845                         if ( $title && $title->exists() ) {
 846                                 $article = new Article( $title );
 847                                 $txt = $article->getContents();
 848                         } else {
 849                                 $txt = '';
 850                         }
 851                 }
 852
 853                 // get all subpage links of the form
 854                 // [[MediaWiki:conversiontable/zh-xx/...|...]]
 855                 $linkhead = $this->mLangObj->getNsText( NS_MEDIAWIKI ) .
 856                         ':Conversiontable';
 857                 $subs = StringUtils::explode( '[[', $txt );
 858                 $sublinks = array();
 859                 foreach ( $subs as $sub ) {
 860                         $link = explode( ']]', $sub, 2 );
 861                         if ( count( $link ) != 2 ) {
 862                                 continue;
 863                         }
 864                         $b = explode( '|', $link[0], 2 );
 865                         $b = explode( '/', trim( $b[0] ), 3 );
 866                         if ( count( $b ) == 3 ) {
 867                                 $sublink = $b[2];
 868                         } else {
 869                                 $sublink = '';
 870                         }
 871
 872                         if ( $b[0] == $linkhead && $b[1] == $code ) {
 873                                 $sublinks[] = $sublink;
 874                         }
 875                 }
 876
 877
 878                 // parse the mappings in this page
 879                 $blocks = StringUtils::explode( '-{', $txt );
 880                 $ret = array();
 881                 $first = true;
 882                 foreach ( $blocks as $block ) {
 883                         if ( $first ) {
 884                                 // Skip the part before the first -{
 885                                 $first = false;
 886                                 continue;
 887                         }
 888                         $mappings = explode( '}-', $block, 2 );
 889                         $stripped = str_replace( array( "'", '"', '*', '#' ), '',
 890                                                                          $mappings[0] );
 891                         $table = StringUtils::explode( ';', $stripped );
 892                         foreach ( $table as $t ) {
 893                                 $m = explode( '=>', $t, 3 );
 894                                 if ( count( $m ) != 2 )
 895                                         continue;
 896                                 // trim any trailling comments starting with '//'
 897                                 $tt = explode( '//', $m[1], 2 );
 898                                 $ret[trim( $m[0] )] = trim( $tt[0] );
 899                         }
 900                 }
 901                 $parsed[$key] = true;
 902
 903
 904                 // recursively parse the subpages
 905                 if ( $recursive ) {
 906                         foreach ( $sublinks as $link ) {
 907                                 $s = $this->parseCachedTable( $code, $link, $recursive );
 908                                 $ret = array_merge( $ret, $s );
 909                         }
 910                 }
 911
 912                 if ( $this->mUcfirst ) {
 913                         foreach ( $ret as $k => $v ) {
 914                                 $ret[Language::ucfirst( $k )] = Language::ucfirst( $v );
 915                         }
 916                 }
 917                 return $ret;
 918         }
 919
 920         /**
 921          * Enclose a string with the "no conversion" tag. This is used by
 922          * various functions in the Parser.
 923          *
 924          * @param $text String: text to be tagged for no conversion
 925          * @param $noParse Unused (?)
 926          * @return String: the tagged text
 927          */
 928         public function markNoConversion( $text, $noParse = false ) {
 929                 # don't mark if already marked
 930                 if ( strpos( $text, '-{' ) || strpos( $text, '}-' ) ) {
 931                         return $text;
 932                 }
 933
 934                 $ret = "-{R|$text}-";
 935                 return $ret;
 936         }
 937
 938         /**
 939          * Convert the sorting key for category links. This should make different
 940          * keys that are variants of each other map to the same key.
 941          */
 942         function convertCategoryKey( $key ) {
 943                 return $key;
 944         }
 945
 946         /**
 947          * Hook to refresh the cache of conversion tables when
 948          * MediaWiki:conversiontable* is updated.
 949          * @private
 950          */
 951         function OnArticleSaveComplete( $article, $user, $text, $summary, $isminor,
 952                         $iswatch, $section, $flags, $revision ) {
 953                 $titleobj = $article->getTitle();
 954                 if ( $titleobj->getNamespace() == NS_MEDIAWIKI ) {
 955                         $title = $titleobj->getDBkey();
 956                         $t = explode( '/', $title, 3 );
 957                         $c = count( $t );
 958                         if ( $c > 1 && $t[0] == 'Conversiontable' ) {
 959                                 if ( $this->validateVariant( $t[1] ) ) {
 960                                         $this->reloadTables();
 961                                 }
 962                         }
 963                 }
 964                 return true;
 965         }
 966
 967         /**
 968          * Armour rendered math against conversion.
 969          * Wrap math into rawoutput -{R| math }- syntax.
 970          */
 971         public function armourMath( $text ) {
 972                 // we need to convert '-{' and '}-' to '-&#123;' and '&#125;-'
 973                 // to avoid a unwanted '}-' appeared after the math-image.
 974                 $text = strtr( $text, array( '-{' => '-&#123;', '}-' => '&#125;-' ) );
 975                 $ret = "-{R|$text}-";
 976                 return $ret;
 977         }
 978
 979         /**
 980          * Get the cached separator pattern for ConverterRule::parseRules()
 981          */
 982         function getVarSeparatorPattern() {
 983                 if ( is_null( $this->mVarSeparatorPattern ) ) {
 984                         // varsep_pattern for preg_split:
 985                         // text should be splited by ";" only if a valid variant
 986                         // name exist after the markup, for example:
 987                         //  -{zh-hans:<span style="font-size:120%;">xxx</span>;zh-hant:\
 988                         //    <span style="font-size:120%;">yyy</span>;}-
 989                         // we should split it as:
 990                         //  array(
 991                         //        [0] => 'zh-hans:<span style="font-size:120%;">xxx</span>'
 992                         //        [1] => 'zh-hant:<span style="font-size:120%;">yyy</span>'
 993                         //        [2] => ''
 994                         //       )
 995                         $pat = '/;\s*(?=';
 996                         foreach ( $this->mVariants as $variant ) {
 997                                 // zh-hans:xxx;zh-hant:yyy
 998                                 $pat .= $variant . '\s*:|';
 999                                 // xxx=>zh-hans:yyy; xxx=>zh-hant:zzz
1000                                 $pat .= '[^;]*?=>\s*' . $variant . '\s*:|';
1001                         }
1002                         $pat .= '\s*$)/';
1003                         $this->mVarSeparatorPattern = $pat;
1004                 }
1005                 return $this->mVarSeparatorPattern;
1006         }
1007 }
1008
1009 /**
1010  * Parser for rules of language conversion , parse rules in -{ }- tag.
1011  * @ingroup Language
1012  * @author fdcn <fdcn64@gmail.com>, PhiLiP <philip.npc@gmail.com>
1013  */
1014 class ConverterRule {
1015         var $mText; // original text in -{text}-
1016         var $mConverter; // LanguageConverter object
1017         var $mManualCodeError = '<strong class="error">code error!</strong>';
1018         var $mRuleDisplay = '';
1019         var $mRuleTitle = false;
1020         var $mRules = '';// string : the text of the rules
1021         var $mRulesAction = 'none';
1022         var $mFlags = array();
1023         var $mVariantFlags = array();
1024         var $mConvTable = array();
1025         var $mBidtable = array();// array of the translation in each variant
1026         var $mUnidtable = array();// array of the translation in each variant
1027
1028         /**
1029          * Constructor
1030          *
1031          * @param $text String: the text between -{ and }-
1032          * @param $converter LanguageConverter object
1033          */
1034         public function __construct( $text, $converter ) {
1035                 $this->mText = $text;
1036                 $this->mConverter = $converter;
1037         }
1038
1039         /**
1040          * Check if variants array in convert array.
1041          *
1042          * @param $variants Array or string: variant language code
1043          * @return String: translated text
1044          */
1045         public function getTextInBidtable( $variants ) {
1046                 $variants = (array)$variants;
1047                 if ( !$variants ) {
1048                         return false;
1049                 }
1050                 foreach ( $variants as $variant ) {
1051                         if ( isset( $this->mBidtable[$variant] ) ) {
1052                                 return $this->mBidtable[$variant];
1053                         }
1054                 }
1055                 return false;
1056         }
1057
1058         /**
1059          * Parse flags with syntax -{FLAG| ... }-
1060          * @private
1061          */
1062         function parseFlags() {
1063                 $text = $this->mText;
1064                 $flags = array();
1065                 $variantFlags = array();
1066
1067                 $sepPos = strpos( $text, '|' );
1068                 if ( $sepPos !== false ) {
1069                         $validFlags = $this->mConverter->mFlags;
1070                         $f = StringUtils::explode( ';', substr( $text, 0, $sepPos ) );
1071                         foreach ( $f as $ff ) {
1072                                 $ff = trim( $ff );
1073                                 if ( isset( $validFlags[$ff] ) ) {
1074                                         $flags[$validFlags[$ff]] = true;
1075                                 }
1076                         }
1077                         $text = strval( substr( $text, $sepPos + 1 ) );
1078                 }
1079
1080                 if ( !$flags ) {
1081                         $flags['S'] = true;
1082                 } elseif ( isset( $flags['R'] ) ) {
1083                         $flags = array( 'R' => true );// remove other flags
1084                 } elseif ( isset( $flags['N'] ) ) {
1085                         $flags = array( 'N' => true );// remove other flags
1086                 } elseif ( isset( $flags['-'] ) ) {
1087                         $flags = array( '-' => true );// remove other flags
1088                 } elseif ( count( $flags ) == 1 && isset( $flags['T'] ) ) {
1089                         $flags['H'] = true;
1090                 } elseif ( isset( $flags['H'] ) ) {
1091                         // replace A flag, and remove other flags except T
1092                         $temp = array( '+' => true, 'H' => true );
1093                         if ( isset( $flags['T'] ) ) {
1094                                 $temp['T'] = true;
1095                         }
1096                         if ( isset( $flags['D'] ) ) {
1097                                 $temp['D'] = true;
1098                         }
1099                         $flags = $temp;
1100                 } else {
1101                         if ( isset( $flags['A'] ) ) {
1102                                 $flags['+'] = true;
1103                                 $flags['S'] = true;
1104                         }
1105                         if ( isset( $flags['D'] ) ) {
1106                                 unset( $flags['S'] );
1107                         }
1108                         // try to find flags like "zh-hans", "zh-hant"
1109                         // allow syntaxes like "-{zh-hans;zh-hant|XXXX}-"
1110                         $variantFlags = array_intersect( array_keys( $flags ), $this->mConverter->mVariants );
1111                         if ( $variantFlags ) {
1112                                 $variantFlags = array_flip( $variantFlags );
1113                                 $flags = array();
1114                         }
1115                 }
1116                 $this->mVariantFlags = $variantFlags;
1117                 $this->mRules = $text;
1118                 $this->mFlags = $flags;
1119         }
1120
1121         /**
1122          * Generate conversion table.
1123          * @private
1124          */
1125         function parseRules() {
1126                 $rules = $this->mRules;
1127                 $flags = $this->mFlags;
1128                 $bidtable = array();
1129                 $unidtable = array();
1130                 $variants = $this->mConverter->mVariants;
1131                 $varsep_pattern = $this->mConverter->getVarSeparatorPattern();
1132
1133                 $choice = preg_split( $varsep_pattern, $rules );
1134
1135                 foreach ( $choice as $c ) {
1136                         $v  = explode( ':', $c, 2 );
1137                         if ( count( $v ) != 2 ) {
1138                                 // syntax error, skip
1139                                 continue;
1140                         }
1141                         $to = trim( $v[1] );
1142                         $v  = trim( $v[0] );
1143                         $u  = explode( '=>', $v, 2 );
1144                         // if $to is empty, strtr() could return a wrong result
1145                         if ( count( $u ) == 1 && $to && in_array( $v, $variants ) ) {
1146                                 $bidtable[$v] = $to;
1147                         } elseif ( count( $u ) == 2 ) {
1148                                 $from = trim( $u[0] );
1149                                 $v    = trim( $u[1] );
1150                                 if ( array_key_exists( $v, $unidtable )
1151                                          && !is_array( $unidtable[$v] )
1152                                          && $to
1153                                          && in_array( $v, $variants ) ) {
1154                                         $unidtable[$v] = array( $from => $to );
1155                                 } elseif ( $to && in_array( $v, $variants ) ) {
1156                                         $unidtable[$v][$from] = $to;
1157                                 }
1158                         }
1159                         // syntax error, pass
1160                         if ( !isset( $this->mConverter->mVariantNames[$v] ) ) {
1161                                 $bidtable = array();
1162                                 $unidtable = array();
1163                                 break;
1164                         }
1165                 }
1166                 $this->mBidtable = $bidtable;
1167                 $this->mUnidtable = $unidtable;
1168         }
1169
1170         /**
1171          * @private
1172          */
1173         function getRulesDesc() {
1174                 $codesep = $this->mConverter->mDescCodeSep;
1175                 $varsep = $this->mConverter->mDescVarSep;
1176                 $text = '';
1177                 foreach ( $this->mBidtable as $k => $v ) {
1178                         $text .= $this->mConverter->mVariantNames[$k] . "$codesep$v$varsep";
1179                 }
1180                 foreach ( $this->mUnidtable as $k => $a ) {
1181                         foreach ( $a as $from => $to ) {
1182                                 $text .= $from . '⇒' . $this->mConverter->mVariantNames[$k] .
1183                                         "$codesep$to$varsep";
1184                         }
1185                 }
1186                 return $text;
1187         }
1188
1189         /**
1190          * Parse rules conversion.
1191          * @private
1192          */
1193         function getRuleConvertedStr( $variant ) {
1194                 $bidtable = $this->mBidtable;
1195                 $unidtable = $this->mUnidtable;
1196
1197                 if ( count( $bidtable ) + count( $unidtable ) == 0 ) {
1198                         return $this->mRules;
1199                 } else {
1200                         // display current variant in bidirectional array
1201                         $disp = $this->getTextInBidtable( $variant );
1202                         // or display current variant in fallbacks
1203                         if ( !$disp ) {
1204                                 $disp = $this->getTextInBidtable(
1205                                                 $this->mConverter->getVariantFallbacks( $variant ) );
1206                         }
1207                         // or display current variant in unidirectional array
1208                         if ( !$disp && array_key_exists( $variant, $unidtable ) ) {
1209                                 $disp = array_values( $unidtable[$variant] );
1210                                 $disp = $disp[0];
1211                         }
1212                         // or display frist text under disable manual convert
1213                         if ( !$disp
1214                                  && $this->mConverter->mManualLevel[$variant] == 'disable' ) {
1215                                 if ( count( $bidtable ) > 0 ) {
1216                                         $disp = array_values( $bidtable );
1217                                         $disp = $disp[0];
1218                                 } else {
1219                                         $disp = array_values( $unidtable );
1220                                         $disp = array_values( $disp[0] );
1221                                         $disp = $disp[0];
1222                                 }
1223                         }
1224                         return $disp;
1225                 }
1226         }
1227
1228         /**
1229          * Generate conversion table for all text.
1230          * @private
1231          */
1232         function generateConvTable() {
1233                 // Special case optimisation
1234                 if ( !$this->mBidtable && !$this->mUnidtable ) {
1235                         $this->mConvTable = array();
1236                         return;
1237                 }
1238
1239                 $bidtable = $this->mBidtable;
1240                 $unidtable = $this->mUnidtable;
1241                 $manLevel = $this->mConverter->mManualLevel;
1242
1243                 $vmarked = array();
1244                 foreach ( $this->mConverter->mVariants as $v ) {
1245                         /* for bidirectional array
1246                                 fill in the missing variants, if any,
1247                                 with fallbacks */
1248                         if ( !isset( $bidtable[$v] ) ) {
1249                                 $variantFallbacks =
1250                                         $this->mConverter->getVariantFallbacks( $v );
1251                                 $vf = $this->getTextInBidtable( $variantFallbacks );
1252                                 if ( $vf ) {
1253                                         $bidtable[$v] = $vf;
1254                                 }
1255                         }
1256
1257                         if ( isset( $bidtable[$v] ) ) {
1258                                 foreach ( $vmarked as $vo ) {
1259                                         // use syntax: -{A|zh:WordZh;zh-tw:WordTw}-
1260                                         // or -{H|zh:WordZh;zh-tw:WordTw}-
1261                                         // or -{-|zh:WordZh;zh-tw:WordTw}-
1262                                         // to introduce a custom mapping between
1263                                         // words WordZh and WordTw in the whole text
1264                                         if ( $manLevel[$v] == 'bidirectional' ) {
1265                                                 $this->mConvTable[$v][$bidtable[$vo]] = $bidtable[$v];
1266                                         }
1267                                         if ( $manLevel[$vo] == 'bidirectional' ) {
1268                                                 $this->mConvTable[$vo][$bidtable[$v]] = $bidtable[$vo];
1269                                         }
1270                                 }
1271                                 $vmarked[] = $v;
1272                         }
1273                         /*for unidirectional array fill to convert tables */
1274                         if ( ( $manLevel[$v] == 'bidirectional' || $manLevel[$v] == 'unidirectional' )
1275                                 && isset( $unidtable[$v] ) )
1276                         {
1277                                 if ( isset( $this->mConvTable[$v] ) ) {
1278                                         $this->mConvTable[$v] = array_merge( $this->mConvTable[$v], $unidtable[$v] );
1279                                 } else {
1280                                         $this->mConvTable[$v] = $unidtable[$v];
1281                                 }
1282                         }
1283                 }
1284         }
1285
1286         /**
1287          * Parse rules and flags.
1288          * @public
1289          */
1290         function parse( $variant = NULL ) {
1291                 if ( !$variant ) {
1292                         $variant = $this->mConverter->getPreferredVariant();
1293                 }
1294
1295                 $variants = $this->mConverter->mVariants;
1296                 $this->parseFlags();
1297                 $flags = $this->mFlags;
1298
1299                 // convert to specified variant
1300                 // syntax: -{zh-hans;zh-hant[;...]|<text to convert>}-
1301                 if ( $this->mVariantFlags ) {
1302                         // check if current variant in flags
1303                         if ( isset( $this->mVariantFlags[$variant] ) ) {
1304                                 // then convert <text to convert> to current language
1305                                 $this->mRules = $this->mConverter->autoConvert( $this->mRules,
1306                                                                                                                                 $variant );
1307                         } else { // if current variant no in flags,
1308                                    // then we check its fallback variants.
1309                                 $variantFallbacks =
1310                                         $this->mConverter->getVariantFallbacks( $variant );
1311                                 foreach ( $variantFallbacks as $variantFallback ) {
1312                                         // if current variant's fallback exist in flags
1313                                         if ( isset( $this->mVariantFlags[$variantFallback] ) ) {
1314                                                 // then convert <text to convert> to fallback language
1315                                                 $this->mRules =
1316                                                         $this->mConverter->autoConvert( $this->mRules,
1317                                                                                                                         $variantFallback );
1318                                                 break;
1319                                         }
1320                                 }
1321                         }
1322                         $this->mFlags = $flags = array( 'R' => true );
1323                 }
1324
1325                 if ( !isset( $flags['R'] ) && !isset( $flags['N'] ) ) {
1326                         // decode => HTML entities modified by Sanitizer::removeHTMLtags
1327                         $this->mRules = str_replace( '=&gt;', '=>', $this->mRules );
1328                         $this->parseRules();
1329                 }
1330                 $rules = $this->mRules;
1331
1332                 if ( !$this->mBidtable && !$this->mUnidtable ) {
1333                         if ( isset( $flags['+'] ) || isset( $flags['-'] ) ) {
1334                                 // fill all variants if text in -{A/H/-|text} without rules
1335                                 foreach ( $this->mConverter->mVariants as $v ) {
1336                                         $this->mBidtable[$v] = $rules;
1337                                 }
1338                         } elseif ( !isset( $flags['N'] ) && !isset( $flags['T'] ) ) {
1339                                 $this->mFlags = $flags = array( 'R' => true );
1340                         }
1341                 }
1342
1343                 $this->mRuleDisplay = false;
1344                 foreach ( $flags as $flag => $unused ) {
1345                         switch ( $flag ) {
1346                                 case 'R':
1347                                         // if we don't do content convert, still strip the -{}- tags
1348                                         $this->mRuleDisplay = $rules;
1349                                         break;
1350                                 case 'N':
1351                                         // process N flag: output current variant name
1352                                         $ruleVar = trim( $rules );
1353                                         if ( isset( $this->mConverter->mVariantNames[$ruleVar] ) ) {
1354                                                 $this->mRuleDisplay = $this->mConverter->mVariantNames[$ruleVar];
1355                                         } else {
1356                                                 $this->mRuleDisplay = '';
1357                                         }
1358                                         break;
1359                                 case 'D':
1360                                         // process D flag: output rules description
1361                                         $this->mRuleDisplay = $this->getRulesDesc();
1362                                         break;
1363                                 case 'H':
1364                                         // process H,- flag or T only: output nothing
1365                                         $this->mRuleDisplay = '';
1366                                         break;
1367                                 case '-':
1368                                         $this->mRulesAction = 'remove';
1369                                         $this->mRuleDisplay = '';
1370                                         break;
1371                                 case '+':
1372                                         $this->mRulesAction = 'add';
1373                                         $this->mRuleDisplay = '';
1374                                         break;
1375                                 case 'S':
1376                                         $this->mRuleDisplay = $this->getRuleConvertedStr( $variant );
1377                                         break;
1378                                 case 'T':
1379                                         $this->mRuleTitle = $this->getRuleConvertedStr( $variant );
1380                                         $this->mRuleDisplay = '';
1381                                         break;
1382                                 default:
1383                                         // ignore unknown flags (but see error case below)
1384                         }
1385                 }
1386                 if ( $this->mRuleDisplay === false ) {
1387                         $this->mRuleDisplay = $this->mManualCodeError;
1388                 }
1389
1390                 $this->generateConvTable();
1391         }
1392
1393         /**
1394          * @public
1395          */
1396         function hasRules() {
1397                 // TODO:
1398         }
1399
1400         /**
1401          * Get display text on markup -{...}-
1402          * @public
1403          */
1404         function getDisplay() {
1405                 return $this->mRuleDisplay;
1406         }
1407
1408         /**
1409          * Get converted title.
1410          * @public
1411          */
1412         function getTitle() {
1413                 return $this->mRuleTitle;
1414         }
1415
1416         /**
1417          * Return how deal with conversion rules.
1418          * @public
1419          */
1420         function getRulesAction() {
1421                 return $this->mRulesAction;
1422         }
1423
1424         /**
1425          * Get conversion table. ( bidirectional and unidirectional
1426          * conversion table )
1427          * @public
1428          */
1429         function getConvTable() {
1430                 return $this->mConvTable;
1431         }
1432
1433         /**
1434          * Get conversion rules string.
1435          * @public
1436          */
1437         function getRules() {
1438                 return $this->mRules;
1439         }
1440
1441         /**
1442          * Get conversion flags.
1443          * @public
1444          */
1445         function getFlags() {
1446                 return $this->mFlags;
1447         }
1448 }