includes/Parser.php

   1 <?php
   2 /**
   3  * File for Parser and related classes
   4  *
   5  * @package MediaWiki
   6  * @subpackage Parser
   7  */
   8
   9 /** */
  10 require_once( 'Sanitizer.php' );
  11
  12 /**
  13  * Update this version number when the ParserOutput format
  14  * changes in an incompatible way, so the parser cache
  15  * can automatically discard old data.
  16  */
  17 define( 'MW_PARSER_VERSION', '1.5.0' );
  18
  19 /**
  20  * Variable substitution O(N^2) attack
  21  *
  22  * Without countermeasures, it would be possible to attack the parser by saving
  23  * a page filled with a large number of inclusions of large pages. The size of
  24  * the generated page would be proportional to the square of the input size.
  25  * Hence, we limit the number of inclusions of any given page, thus bringing any
  26  * attack back to O(N).
  27  */
  28
  29 define( 'MAX_INCLUDE_REPEAT', 100 );
  30 define( 'MAX_INCLUDE_SIZE', 1000000 ); // 1 Million
  31
  32 define( 'RLH_FOR_UPDATE', 1 );
  33
  34 # Allowed values for $mOutputType
  35 define( 'OT_HTML', 1 );
  36 define( 'OT_WIKI', 2 );
  37 define( 'OT_MSG' , 3 );
  38
  39 # string parameter for extractTags which will cause it
  40 # to strip HTML comments in addition to regular
  41 # <XML>-style tags. This should not be anything we
  42 # may want to use in wikisyntax
  43 define( 'STRIP_COMMENTS', 'HTMLCommentStrip' );
  44
  45 # prefix for escaping, used in two functions at least
  46 define( 'UNIQ_PREFIX', 'NaodW29');
  47
  48 # Constants needed for external link processing
  49 define( 'URL_PROTOCOLS', 'http|https|ftp|irc|gopher|news|mailto' );
  50 define( 'HTTP_PROTOCOLS', 'http|https' );
  51 # Everything except bracket, space, or control characters
  52 define( 'EXT_LINK_URL_CLASS', '[^]<>"\\x00-\\x20\\x7F]' );
  53 # Including space
  54 define( 'EXT_LINK_TEXT_CLASS', '[^\]\\x00-\\x1F\\x7F]' );
  55 define( 'EXT_IMAGE_FNAME_CLASS', '[A-Za-z0-9_.,~%\\-+&;#*?!=()@\\x80-\\xFF]' );
  56 define( 'EXT_IMAGE_EXTENSIONS', 'gif|png|jpg|jpeg' );
  57 define( 'EXT_LINK_BRACKETED',  '/\[(\b('.URL_PROTOCOLS.'):'.EXT_LINK_URL_CLASS.'+) *('.EXT_LINK_TEXT_CLASS.'*?)\]/S' );
  58 define( 'EXT_IMAGE_REGEX',
  59         '/^('.HTTP_PROTOCOLS.':)'.  # Protocol
  60         '('.EXT_LINK_URL_CLASS.'+)\\/'.  # Hostname and path
  61         '('.EXT_IMAGE_FNAME_CLASS.'+)\\.((?i)'.EXT_IMAGE_EXTENSIONS.')$/S' # Filename
  62 );
  63
  64 /**
  65  * PHP Parser
  66  *
  67  * Processes wiki markup
  68  *
  69  * <pre>
  70  * There are three main entry points into the Parser class:
  71  * parse()
  72  *   produces HTML output
  73  * preSaveTransform().
  74  *   produces altered wiki markup.
  75  * transformMsg()
  76  *   performs brace substitution on MediaWiki messages
  77  *
  78  * Globals used:
  79  *    objects:   $wgLang, $wgLinkCache
  80  *
  81  * NOT $wgArticle, $wgUser or $wgTitle. Keep them away!
  82  *
  83  * settings:
  84  *  $wgUseTex*, $wgUseDynamicDates*, $wgInterwikiMagic*,
  85  *  $wgNamespacesWithSubpages, $wgAllowExternalImages*,
  86  *  $wgLocaltimezone, $wgAllowSpecialInclusion*
  87  *
  88  *  * only within ParserOptions
  89  * </pre>
  90  *
  91  * @package MediaWiki
  92  */
  93 class Parser
  94 {
  95         /**#@+
  96          * @access private
  97          */
  98         # Persistent:
  99         var $mTagHooks;
 100
 101         # Cleared with clearState():
 102         var $mOutput, $mAutonumber, $mDTopen, $mStripState = array();
 103         var $mVariables, $mIncludeCount, $mArgStack, $mLastSection, $mInPre;
 104         var $mInterwikiLinkHolders, $mLinkHolders;
 105
 106         # Temporary:
 107         var $mOptions, $mTitle, $mOutputType,
 108             $mTemplates,        // cache of already loaded templates, avoids
 109                                 // multiple SQL queries for the same string
 110             $mTemplatePath;     // stores an unsorted hash of all the templates already loaded
 111                                 // in this path. Used for loop detection.
 112
 113         /**#@-*/
 114
 115         /**
 116          * Constructor
 117          *
 118          * @access public
 119          */
 120         function Parser() {
 121                 global $wgContLang;
 122                 $this->mTemplates = array();
 123                 $this->mTemplatePath = array();
 124                 $this->mTagHooks = array();
 125                 $this->clearState();
 126         }
 127
 128         /**
 129          * Clear Parser state
 130          *
 131          * @access private
 132          */
 133         function clearState() {
 134                 $this->mOutput = new ParserOutput;
 135                 $this->mAutonumber = 0;
 136                 $this->mLastSection = '';
 137                 $this->mDTopen = false;
 138                 $this->mVariables = false;
 139                 $this->mIncludeCount = array();
 140                 $this->mStripState = array();
 141                 $this->mArgStack = array();
 142                 $this->mInPre = false;
 143                 $this->mInterwikiLinkHolders = array(
 144                         'texts' => array(),
 145                         'titles' => array()
 146                 );
 147                 $this->mLinkHolders = array(
 148                         'namespaces' => array(),
 149                         'dbkeys' => array(),
 150                         'queries' => array(),
 151                         'texts' => array(),
 152                         'titles' => array()
 153                 );
 154         }
 155
 156         /**
 157          * First pass--just handle <nowiki> sections, pass the rest off
 158          * to internalParse() which does all the real work.
 159          *
 160          * @access private
 161          * @param string $text Text we want to parse
 162          * @param Title &$title A title object
 163          * @param array $options
 164          * @param boolean $linestart
 165          * @param boolean $clearState
 166          * @return ParserOutput a ParserOutput
 167          */
 168         function parse( $text, &$title, $options, $linestart = true, $clearState = true ) {
 169                 global $wgUseTidy, $wgContLang;
 170                 $fname = 'Parser::parse';
 171                 wfProfileIn( $fname );
 172
 173                 if ( $clearState ) {
 174                         $this->clearState();
 175                 }
 176
 177                 $this->mOptions = $options;
 178                 $this->mTitle =& $title;
 179                 $this->mOutputType = OT_HTML;
 180
 181                 $this->mStripState = NULL;
 182
 183                 //$text = $this->strip( $text, $this->mStripState );
 184                 // VOODOO MAGIC FIX! Sometimes the above segfaults in PHP5.
 185                 $x =& $this->mStripState;
 186                 $text = $this->strip( $text, $x );
 187
 188                 $text = $this->internalParse( $text );
 189
 190
 191                 $text = $this->unstrip( $text, $this->mStripState );
 192
 193                 # Clean up special characters, only run once, next-to-last before doBlockLevels
 194                 $fixtags = array(
 195                         # french spaces, last one Guillemet-left
 196                         # only if there is something before the space
 197                         '/(.) (?=\\?|:|;|!|\\302\\273)/' => '\\1&nbsp;\\2',
 198                         # french spaces, Guillemet-right
 199                         '/(\\302\\253) /' => '\\1&nbsp;',
 200                         '/<hr *>/i' => '<hr />',
 201                         '/<br *>/i' => '<br />',
 202                         '/<center *>/i' => '<div class="center">',
 203                         '/<\\/center *>/i' => '</div>',
 204                 );
 205                 $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 206
 207                 # only once and last
 208                 $text = $this->doBlockLevels( $text, $linestart );
 209
 210                 $this->replaceLinkHolders( $text );
 211
 212                 $dashReplace = array(
 213                         '/ - /' => "&nbsp;&ndash; ", # N dash
 214                         '/(?<=[\d])-(?=[\d])/' => "&ndash;", # N dash between numbers
 215                         '/ -- /' => "&nbsp;&mdash; " # M dash
 216                 );
 217                 $text = preg_replace( array_keys($dashReplace), array_values($dashReplace), $text );
 218
 219                 # the position of the convert() call should not be changed. it
 220                 # assumes that the links are all replaces and the only thing left
 221                 # is the <nowiki> mark.
 222                 $text = $wgContLang->convert($text);
 223                 $this->mOutput->setTitleText($wgContLang->getParsedTitle());
 224
 225                 $text = $this->unstripNoWiki( $text, $this->mStripState );
 226
 227                 $text = Sanitizer::normalizeCharReferences( $text );
 228                 global $wgUseTidy;
 229                 if ($wgUseTidy) {
 230                         $text = Parser::tidy($text);
 231                 }
 232
 233                 $this->mOutput->setText( $text );
 234                 wfProfileOut( $fname );
 235                 return $this->mOutput;
 236         }
 237
 238         /**
 239          * Get a random string
 240          *
 241          * @access private
 242          * @static
 243          */
 244         function getRandomString() {
 245                 return dechex(mt_rand(0, 0x7fffffff)) . dechex(mt_rand(0, 0x7fffffff));
 246         }
 247
 248         /**
 249          * Replaces all occurrences of <$tag>content</$tag> in the text
 250          * with a random marker and returns the new text. the output parameter
 251          * $content will be an associative array filled with data on the form
 252          * $unique_marker => content.
 253          *
 254          * If $content is already set, the additional entries will be appended
 255          * If $tag is set to STRIP_COMMENTS, the function will extract
 256          * <!-- HTML comments -->
 257          *
 258          * @access private
 259          * @static
 260          */
 261         function extractTagsAndParams($tag, $text, &$content, &$tags, &$params, $uniq_prefix = ''){
 262                 $rnd = $uniq_prefix . '-' . $tag . Parser::getRandomString();
 263                 if ( !$content ) {
 264                         $content = array( );
 265                 }
 266                 $n = 1;
 267                 $stripped = '';
 268
 269                 if ( !$tags ) {
 270                         $tags = array( );
 271                 }
 272
 273                 if ( !$params ) {
 274                         $params = array( );
 275                 }
 276
 277                 if( $tag == STRIP_COMMENTS ) {
 278                         $start = '/<!--()/';
 279                         $end   = '/-->/';
 280                 } else {
 281                         $start = "/<$tag([^>]*)>/i";
 282                         $end   = "/<\\/$tag\\s*>/i";
 283                 }
 284
 285                 while ( '' != $text ) {
 286                         $p = preg_split( $start, $text, 2, PREG_SPLIT_DELIM_CAPTURE );
 287                         $stripped .= $p[0];
 288                         if( count( $p ) < 3 ) {
 289                                 break;
 290                         }
 291                         $attributes = $p[1];
 292                         $inside     = $p[2];
 293
 294                         $marker = $rnd . sprintf('%08X', $n++);
 295                         $stripped .= $marker;
 296
 297                         $tags[$marker] = "<$tag$attributes>";
 298                         $params[$marker] = Sanitizer::decodeTagAttributes( $attributes );
 299
 300                         $q = preg_split( $end, $inside, 2 );
 301                         $content[$marker] = $q[0];
 302                         if( count( $q ) < 1 ) {
 303                                 # No end tag -- let it run out to the end of the text.
 304                                 break;
 305                         } else {
 306                                 $text = $q[1];
 307                         }
 308                 }
 309                 return $stripped;
 310         }
 311
 312         /**
 313          * Wrapper function for extractTagsAndParams
 314          * for cases where $tags and $params isn't needed
 315          * i.e. where tags will never have params, like <nowiki>
 316          *
 317          * @access private
 318          * @static
 319          */
 320         function extractTags( $tag, $text, &$content, $uniq_prefix = '' ) {
 321                 $dummy_tags = array();
 322                 $dummy_params = array();
 323
 324                 return Parser::extractTagsAndParams( $tag, $text, $content,
 325                         $dummy_tags, $dummy_params, $uniq_prefix );
 326         }
 327
 328         /**
 329          * Strips and renders nowiki, pre, math, hiero
 330          * If $render is set, performs necessary rendering operations on plugins
 331          * Returns the text, and fills an array with data needed in unstrip()
 332          * If the $state is already a valid strip state, it adds to the state
 333          *
 334          * @param bool $stripcomments when set, HTML comments <!-- like this -->
 335          *  will be stripped in addition to other tags. This is important
 336          *  for section editing, where these comments cause confusion when
 337          *  counting the sections in the wikisource
 338          *
 339          * @access private
 340          */
 341         function strip( $text, &$state, $stripcomments = false ) {
 342                 $render = ($this->mOutputType == OT_HTML);
 343                 $html_content = array();
 344                 $nowiki_content = array();
 345                 $math_content = array();
 346                 $pre_content = array();
 347                 $comment_content = array();
 348                 $ext_content = array();
 349                 $ext_tags = array();
 350                 $ext_params = array();
 351                 $gallery_content = array();
 352
 353                 # Replace any instances of the placeholders
 354                 $uniq_prefix = UNIQ_PREFIX;
 355                 #$text = str_replace( $uniq_prefix, wfHtmlEscapeFirst( $uniq_prefix ), $text );
 356
 357                 # html
 358                 global $wgRawHtml, $wgWhitelistEdit;
 359                 if( $wgRawHtml && $wgWhitelistEdit ) {
 360                         $text = Parser::extractTags('html', $text, $html_content, $uniq_prefix);
 361                         foreach( $html_content as $marker => $content ) {
 362                                 if ($render ) {
 363                                         # Raw and unchecked for validity.
 364                                         $html_content[$marker] = $content;
 365                                 } else {
 366                                         $html_content[$marker] = '<html>'.$content.'</html>';
 367                                 }
 368                         }
 369                 }
 370
 371                 # nowiki
 372                 $text = Parser::extractTags('nowiki', $text, $nowiki_content, $uniq_prefix);
 373                 foreach( $nowiki_content as $marker => $content ) {
 374                         if( $render ){
 375                                 $nowiki_content[$marker] = wfEscapeHTMLTagsOnly( $content );
 376                         } else {
 377                                 $nowiki_content[$marker] = '<nowiki>'.$content.'</nowiki>';
 378                         }
 379                 }
 380
 381                 # math
 382                 $text = Parser::extractTags('math', $text, $math_content, $uniq_prefix);
 383                 foreach( $math_content as $marker => $content ){
 384                         if( $render ) {
 385                                 if( $this->mOptions->getUseTeX() ) {
 386                                         $math_content[$marker] = renderMath( $content );
 387                                 } else {
 388                                         $math_content[$marker] = '&lt;math&gt;'.$content.'&lt;math&gt;';
 389                                 }
 390                         } else {
 391                                 $math_content[$marker] = '<math>'.$content.'</math>';
 392                         }
 393                 }
 394
 395                 # pre
 396                 $text = Parser::extractTags('pre', $text, $pre_content, $uniq_prefix);
 397                 foreach( $pre_content as $marker => $content ){
 398                         if( $render ){
 399                                 $pre_content[$marker] = '<pre>' . wfEscapeHTMLTagsOnly( $content ) . '</pre>';
 400                         } else {
 401                                 $pre_content[$marker] = '<pre>'.$content.'</pre>';
 402                         }
 403                 }
 404
 405                 # gallery
 406                 $text = Parser::extractTags('gallery', $text, $gallery_content, $uniq_prefix);
 407                 foreach( $gallery_content as $marker => $content ) {
 408                         require_once( 'ImageGallery.php' );
 409                         if ( $render ) {
 410                                 $gallery_content[$marker] = Parser::renderImageGallery( $content );
 411                         } else {
 412                                 $gallery_content[$marker] = '<gallery>'.$content.'</gallery>';
 413                         }
 414                 }
 415
 416                 # Comments
 417                 if($stripcomments) {
 418                         $text = Parser::extractTags(STRIP_COMMENTS, $text, $comment_content, $uniq_prefix);
 419                         foreach( $comment_content as $marker => $content ){
 420                                 $comment_content[$marker] = '<!--'.$content.'-->';
 421                         }
 422                 }
 423
 424                 # Extensions
 425                 foreach ( $this->mTagHooks as $tag => $callback ) {
 426                         $ext_content[$tag] = array();
 427                         $text = Parser::extractTagsAndParams( $tag, $text, $ext_content[$tag],
 428                                 $ext_tags[$tag], $ext_params[$tag], $uniq_prefix );
 429                         foreach( $ext_content[$tag] as $marker => $content ) {
 430                                 $full_tag = $ext_tags[$tag][$marker];
 431                                 $params = $ext_params[$tag][$marker];
 432                                 if ( $render ) {
 433                                         $ext_content[$tag][$marker] = $callback( $content, $params );
 434                                 } else {
 435                                         $ext_content[$tag][$marker] = "$full_tag$content</$tag>";
 436                                 }
 437                         }
 438                 }
 439
 440                 # Merge state with the pre-existing state, if there is one
 441                 if ( $state ) {
 442                         $state['html'] = $state['html'] + $html_content;
 443                         $state['nowiki'] = $state['nowiki'] + $nowiki_content;
 444                         $state['math'] = $state['math'] + $math_content;
 445                         $state['pre'] = $state['pre'] + $pre_content;
 446                         $state['comment'] = $state['comment'] + $comment_content;
 447                         $state['gallery'] = $state['gallery'] + $gallery_content;
 448
 449                         foreach( $ext_content as $tag => $array ) {
 450                                 if ( array_key_exists( $tag, $state ) ) {
 451                                         $state[$tag] = $state[$tag] + $array;
 452                                 }
 453                         }
 454                 } else {
 455                         $state = array(
 456                           'html' => $html_content,
 457                           'nowiki' => $nowiki_content,
 458                           'math' => $math_content,
 459                           'pre' => $pre_content,
 460                           'comment' => $comment_content,
 461                           'gallery' => $gallery_content,
 462                         ) + $ext_content;
 463                 }
 464                 return $text;
 465         }
 466
 467         /**
 468          * restores pre, math, and hiero removed by strip()
 469          *
 470          * always call unstripNoWiki() after this one
 471          * @access private
 472          */
 473         function unstrip( $text, &$state ) {
 474                 # Must expand in reverse order, otherwise nested tags will be corrupted
 475                 $contentDict = end( $state );
 476                 for ( $contentDict = end( $state ); $contentDict !== false; $contentDict = prev( $state ) ) {
 477                         if( key($state) != 'nowiki' && key($state) != 'html') {
 478                                 for ( $content = end( $contentDict ); $content !== false; $content = prev( $contentDict ) ) {
 479                                         $text = str_replace( key( $contentDict ), $content, $text );
 480                                 }
 481                         }
 482                 }
 483
 484                 return $text;
 485         }
 486
 487         /**
 488          * always call this after unstrip() to preserve the order
 489          *
 490          * @access private
 491          */
 492         function unstripNoWiki( $text, &$state ) {
 493                 # Must expand in reverse order, otherwise nested tags will be corrupted
 494                 for ( $content = end($state['nowiki']); $content !== false; $content = prev( $state['nowiki'] ) ) {
 495                         $text = str_replace( key( $state['nowiki'] ), $content, $text );
 496                 }
 497
 498                 global $wgRawHtml;
 499                 if ($wgRawHtml) {
 500                         for ( $content = end($state['html']); $content !== false; $content = prev( $state['html'] ) ) {
 501                                 $text = str_replace( key( $state['html'] ), $content, $text );
 502                         }
 503                 }
 504
 505                 return $text;
 506         }
 507
 508         /**
 509          * Add an item to the strip state
 510          * Returns the unique tag which must be inserted into the stripped text
 511          * The tag will be replaced with the original text in unstrip()
 512          *
 513          * @access private
 514          */
 515         function insertStripItem( $text, &$state ) {
 516                 $rnd = UNIQ_PREFIX . '-item' . Parser::getRandomString();
 517                 if ( !$state ) {
 518                         $state = array(
 519                           'html' => array(),
 520                           'nowiki' => array(),
 521                           'math' => array(),
 522                           'pre' => array()
 523                         );
 524                 }
 525                 $state['item'][$rnd] = $text;
 526                 return $rnd;
 527         }
 528
 529         /**
 530          * Interface with html tidy, used if $wgUseTidy = true.
 531          * If tidy isn't able to correct the markup, the original will be
 532          * returned in all its glory with a warning comment appended.
 533          *
 534          * Either the external tidy program or the in-process tidy extension
 535          * will be used depending on availability. Override the default
 536          * $wgTidyInternal setting to disable the internal if it's not working.
 537          *
 538          * @param string $text Hideous HTML input
 539          * @return string Corrected HTML output
 540          * @access public
 541          * @static
 542          */
 543         function tidy( $text ) {
 544                 global $wgTidyInternal;
 545                 $wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"'.
 546 ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>'.
 547 '<head><title>test</title></head><body>'.$text.'</body></html>';
 548                 if( $wgTidyInternal ) {
 549                         $correctedtext = Parser::internalTidy( $wrappedtext );
 550                 } else {
 551                         $correctedtext = Parser::externalTidy( $wrappedtext );
 552                 }
 553                 if( is_null( $correctedtext ) ) {
 554                         wfDebug( "Tidy error detected!\n" );
 555                         return $text . "\n<!-- Tidy found serious XHTML errors -->\n";
 556                 }
 557                 return $correctedtext;
 558         }
 559
 560         /**
 561          * Spawn an external HTML tidy process and get corrected markup back from it.
 562          *
 563          * @access private
 564          * @static
 565          */
 566         function externalTidy( $text ) {
 567                 global $wgTidyConf, $wgTidyBin, $wgTidyOpts;
 568                 $fname = 'Parser::externalTidy';
 569                 wfProfileIn( $fname );
 570
 571                 $cleansource = '';
 572                 $opts = ' -utf8';
 573
 574                 $descriptorspec = array(
 575                         0 => array('pipe', 'r'),
 576                         1 => array('pipe', 'w'),
 577                         2 => array('file', '/dev/null', 'a')
 578                 );
 579                 $pipes = array();
 580                 $process = proc_open("$wgTidyBin -config $wgTidyConf $wgTidyOpts$opts", $descriptorspec, $pipes);
 581                 if (is_resource($process)) {
 582                         fwrite($pipes[0], $text);
 583                         fclose($pipes[0]);
 584                         while (!feof($pipes[1])) {
 585                                 $cleansource .= fgets($pipes[1], 1024);
 586                         }
 587                         fclose($pipes[1]);
 588                         proc_close($process);
 589                 }
 590
 591                 wfProfileOut( $fname );
 592
 593                 if( $cleansource == '' && $text != '') {
 594                         // Some kind of error happened, so we couldn't get the corrected text.
 595                         // Just give up; we'll use the source text and append a warning.
 596                         return null;
 597                 } else {
 598                         return $cleansource;
 599                 }
 600         }
 601
 602         /**
 603          * Use the HTML tidy PECL extension to use the tidy library in-process,
 604          * saving the overhead of spawning a new process. Currently written to
 605          * the PHP 4.3.x version of the extension, may not work on PHP 5.
 606          *
 607          * 'pear install tidy' should be able to compile the extension module.
 608          *
 609          * @access private
 610          * @static
 611          */
 612         function internalTidy( $text ) {
 613                 global $wgTidyConf;
 614                 $fname = 'Parser::internalTidy';
 615                 wfProfileIn( $fname );
 616
 617                 tidy_load_config( $wgTidyConf );
 618                 tidy_set_encoding( 'utf8' );
 619                 tidy_parse_string( $text );
 620                 tidy_clean_repair();
 621                 if( tidy_get_status() == 2 ) {
 622                         // 2 is magic number for fatal error
 623                         // http://www.php.net/manual/en/function.tidy-get-status.php
 624                         $cleansource = null;
 625                 } else {
 626                         $cleansource = tidy_get_output();
 627                 }
 628                 wfProfileOut( $fname );
 629                 return $cleansource;
 630         }
 631
 632         /**
 633          * parse the wiki syntax used to render tables
 634          *
 635          * @access private
 636          */
 637         function doTableStuff ( $t ) {
 638                 $fname = 'Parser::doTableStuff';
 639                 wfProfileIn( $fname );
 640
 641                 $t = explode ( "\n" , $t ) ;
 642                 $td = array () ; # Is currently a td tag open?
 643                 $ltd = array () ; # Was it TD or TH?
 644                 $tr = array () ; # Is currently a tr tag open?
 645                 $ltr = array () ; # tr attributes
 646                 $indent_level = 0; # indent level of the table
 647                 foreach ( $t AS $k => $x )
 648                 {
 649                         $x = trim ( $x ) ;
 650                         $fc = substr ( $x , 0 , 1 ) ;
 651                         if ( preg_match( '/^(:*)\{\|(.*)$/', $x, $matches ) ) {
 652                                 $indent_level = strlen( $matches[1] );
 653                                 $t[$k] = str_repeat( '<dl><dd>', $indent_level ) .
 654                                         '<table' . Sanitizer::fixTagAttributes ( $matches[2], 'table' ) . '>' ;
 655                                 array_push ( $td , false ) ;
 656                                 array_push ( $ltd , '' ) ;
 657                                 array_push ( $tr , false ) ;
 658                                 array_push ( $ltr , '' ) ;
 659                         }
 660                         else if ( count ( $td ) == 0 ) { } # Don't do any of the following
 661                         else if ( '|}' == substr ( $x , 0 , 2 ) ) {
 662                                 $z = "</table>" . substr ( $x , 2);
 663                                 $l = array_pop ( $ltd ) ;
 664                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 665                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 666                                 array_pop ( $ltr ) ;
 667                                 $t[$k] = $z . str_repeat( '</dd></dl>', $indent_level );
 668                         }
 669                         else if ( '|-' == substr ( $x , 0 , 2 ) ) { # Allows for |---------------
 670                                 $x = substr ( $x , 1 ) ;
 671                                 while ( $x != '' && substr ( $x , 0 , 1 ) == '-' ) $x = substr ( $x , 1 ) ;
 672                                 $z = '' ;
 673                                 $l = array_pop ( $ltd ) ;
 674                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 675                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 676                                 array_pop ( $ltr ) ;
 677                                 $t[$k] = $z ;
 678                                 array_push ( $tr , false ) ;
 679                                 array_push ( $td , false ) ;
 680                                 array_push ( $ltd , '' ) ;
 681                                 array_push ( $ltr , Sanitizer::fixTagAttributes ( $x, 'tr' ) ) ;
 682                         }
 683                         else if ( '|' == $fc || '!' == $fc || '|+' == substr ( $x , 0 , 2 ) ) { # Caption
 684                                 # $x is a table row
 685                                 if ( '|+' == substr ( $x , 0 , 2 ) ) {
 686                                         $fc = '+' ;
 687                                         $x = substr ( $x , 1 ) ;
 688                                 }
 689                                 $after = substr ( $x , 1 ) ;
 690                                 if ( $fc == '!' ) $after = str_replace ( '!!' , '||' , $after ) ;
 691                                 $after = explode ( '||' , $after ) ;
 692                                 $t[$k] = '' ;
 693
 694                                 # Loop through each table cell
 695                                 foreach ( $after AS $theline )
 696                                 {
 697                                         $z = '' ;
 698                                         if ( $fc != '+' )
 699                                         {
 700                                                 $tra = array_pop ( $ltr ) ;
 701                                                 if ( !array_pop ( $tr ) ) $z = '<tr'.$tra.">\n" ;
 702                                                 array_push ( $tr , true ) ;
 703                                                 array_push ( $ltr , '' ) ;
 704                                         }
 705
 706                                         $l = array_pop ( $ltd ) ;
 707                                         if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 708                                         if ( $fc == '|' ) $l = 'td' ;
 709                                         else if ( $fc == '!' ) $l = 'th' ;
 710                                         else if ( $fc == '+' ) $l = 'caption' ;
 711                                         else $l = '' ;
 712                                         array_push ( $ltd , $l ) ;
 713
 714                                         # Cell parameters
 715                                         $y = explode ( '|' , $theline , 2 ) ;
 716                                         # Note that a '|' inside an invalid link should not
 717                                         # be mistaken as delimiting cell parameters
 718                                         if ( strpos( $y[0], '[[' ) !== false ) {
 719                                                 $y = array ($theline);
 720                                         }
 721                                         if ( count ( $y ) == 1 )
 722                                                 $y = "{$z}<{$l}>{$y[0]}" ;
 723                                         else $y = $y = "{$z}<{$l}".Sanitizer::fixTagAttributes($y[0], $l).">{$y[1]}" ;
 724                                         $t[$k] .= $y ;
 725                                         array_push ( $td , true ) ;
 726                                 }
 727                         }
 728                 }
 729
 730                 # Closing open td, tr && table
 731                 while ( count ( $td ) > 0 )
 732                 {
 733                         if ( array_pop ( $td ) ) $t[] = '</td>' ;
 734                         if ( array_pop ( $tr ) ) $t[] = '</tr>' ;
 735                         $t[] = '</table>' ;
 736                 }
 737
 738                 $t = implode ( "\n" , $t ) ;
 739                 wfProfileOut( $fname );
 740                 return $t ;
 741         }
 742
 743         /**
 744          * Helper function for parse() that transforms wiki markup into
 745          * HTML. Only called for $mOutputType == OT_HTML.
 746          *
 747          * @access private
 748          */
 749         function internalParse( $text ) {
 750                 global $wgContLang;
 751                 $args = array();
 752                 $isMain = true;
 753                 $fname = 'Parser::internalParse';
 754                 wfProfileIn( $fname );
 755
 756                 $text = Sanitizer::removeHTMLtags( $text );
 757                 $text = $this->replaceVariables( $text, $args );
 758
 759                 $text = preg_replace( '/(^|\n)-----*/', '\\1<hr />', $text );
 760
 761                 $text = $this->doHeadings( $text );
 762                 if($this->mOptions->getUseDynamicDates()) {
 763                         $df =& DateFormatter::getInstance();
 764                         $text = $df->reformat( $this->mOptions->getDateFormat(), $text );
 765                 }
 766                 $text = $this->doAllQuotes( $text );
 767                 $text = $this->replaceInternalLinks( $text );
 768                 $text = $this->replaceExternalLinks( $text );
 769
 770                 # replaceInternalLinks may sometimes leave behind
 771                 # absolute URLs, which have to be masked to hide them from replaceExternalLinks
 772                 $text = str_replace("http-noparse://","http://",$text);
 773
 774                 $text = $this->doMagicLinks( $text );
 775                 $text = $this->doTableStuff( $text );
 776                 $text = $this->formatHeadings( $text, $isMain );
 777
 778                 wfProfileOut( $fname );
 779                 return $text;
 780         }
 781
 782         /**
 783          * Replace special strings like "ISBN xxx" and "RFC xxx" with
 784          * magic external links.
 785          *
 786          * @access private
 787          */
 788         function &doMagicLinks( &$text ) {
 789                 $text = $this->magicISBN( $text );
 790                 $text = $this->magicRFC( $text, 'RFC ', 'rfcurl' );
 791                 $text = $this->magicRFC( $text, 'PMID ', 'pubmedurl' );
 792                 return $text;
 793         }
 794
 795         /**
 796          * Parse ^^ tokens and return html
 797          *
 798          * @access private
 799          */
 800         function doExponent( $text ) {
 801                 $fname = 'Parser::doExponent';
 802                 wfProfileIn( $fname );
 803                 $text = preg_replace('/\^\^(.*)\^\^/','<small><sup>\\1</sup></small>', $text);
 804                 wfProfileOut( $fname );
 805                 return $text;
 806         }
 807
 808         /**
 809          * Parse headers and return html
 810          *
 811          * @access private
 812          */
 813         function doHeadings( $text ) {
 814                 $fname = 'Parser::doHeadings';
 815                 wfProfileIn( $fname );
 816                 for ( $i = 6; $i >= 1; --$i ) {
 817                         $h = substr( '======', 0, $i );
 818                         $text = preg_replace( "/^{$h}(.+){$h}(\\s|$)/m",
 819                           "<h{$i}>\\1</h{$i}>\\2", $text );
 820                 }
 821                 wfProfileOut( $fname );
 822                 return $text;
 823         }
 824
 825         /**
 826          * Replace single quotes with HTML markup
 827          * @access private
 828          * @return string the altered text
 829          */
 830         function doAllQuotes( $text ) {
 831                 $fname = 'Parser::doAllQuotes';
 832                 wfProfileIn( $fname );
 833                 $outtext = '';
 834                 $lines = explode( "\n", $text );
 835                 foreach ( $lines as $line ) {
 836                         $outtext .= $this->doQuotes ( $line ) . "\n";
 837                 }
 838                 $outtext = substr($outtext, 0,-1);
 839                 wfProfileOut( $fname );
 840                 return $outtext;
 841         }
 842
 843         /**
 844          * Helper function for doAllQuotes()
 845          * @access private
 846          */
 847         function doQuotes( $text ) {
 848                 $arr = preg_split( "/(''+)/", $text, -1, PREG_SPLIT_DELIM_CAPTURE );
 849                 if ( count( $arr ) == 1 )
 850                         return $text;
 851                 else
 852                 {
 853                         # First, do some preliminary work. This may shift some apostrophes from
 854                         # being mark-up to being text. It also counts the number of occurrences
 855                         # of bold and italics mark-ups.
 856                         $i = 0;
 857                         $numbold = 0;
 858                         $numitalics = 0;
 859                         foreach ( $arr as $r )
 860                         {
 861                                 if ( ( $i % 2 ) == 1 )
 862                                 {
 863                                         # If there are ever four apostrophes, assume the first is supposed to
 864                                         # be text, and the remaining three constitute mark-up for bold text.
 865                                         if ( strlen( $arr[$i] ) == 4 )
 866                                         {
 867                                                 $arr[$i-1] .= "'";
 868                                                 $arr[$i] = "'''";
 869                                         }
 870                                         # If there are more than 5 apostrophes in a row, assume they're all
 871                                         # text except for the last 5.
 872                                         else if ( strlen( $arr[$i] ) > 5 )
 873                                         {
 874                                                 $arr[$i-1] .= str_repeat( "'", strlen( $arr[$i] ) - 5 );
 875                                                 $arr[$i] = "'''''";
 876                                         }
 877                                         # Count the number of occurrences of bold and italics mark-ups.
 878                                         # We are not counting sequences of five apostrophes.
 879                                         if ( strlen( $arr[$i] ) == 2 ) $numitalics++;  else
 880                                         if ( strlen( $arr[$i] ) == 3 ) $numbold++;     else
 881                                         if ( strlen( $arr[$i] ) == 5 ) { $numitalics++; $numbold++; }
 882                                 }
 883                                 $i++;
 884                         }
 885
 886                         # If there is an odd number of both bold and italics, it is likely
 887                         # that one of the bold ones was meant to be an apostrophe followed
 888                         # by italics. Which one we cannot know for certain, but it is more
 889                         # likely to be one that has a single-letter word before it.
 890                         if ( ( $numbold % 2 == 1 ) && ( $numitalics % 2 == 1 ) )
 891                         {
 892                                 $i = 0;
 893                                 $firstsingleletterword = -1;
 894                                 $firstmultiletterword = -1;
 895                                 $firstspace = -1;
 896                                 foreach ( $arr as $r )
 897                                 {
 898                                         if ( ( $i % 2 == 1 ) and ( strlen( $r ) == 3 ) )
 899                                         {
 900                                                 $x1 = substr ($arr[$i-1], -1);
 901                                                 $x2 = substr ($arr[$i-1], -2, 1);
 902                                                 if ($x1 == ' ') {
 903                                                         if ($firstspace == -1) $firstspace = $i;
 904                                                 } else if ($x2 == ' ') {
 905                                                         if ($firstsingleletterword == -1) $firstsingleletterword = $i;
 906                                                 } else {
 907                                                         if ($firstmultiletterword == -1) $firstmultiletterword = $i;
 908                                                 }
 909                                         }
 910                                         $i++;
 911                                 }
 912
 913                                 # If there is a single-letter word, use it!
 914                                 if ($firstsingleletterword > -1)
 915                                 {
 916                                         $arr [ $firstsingleletterword ] = "''";
 917                                         $arr [ $firstsingleletterword-1 ] .= "'";
 918                                 }
 919                                 # If not, but there's a multi-letter word, use that one.
 920                                 else if ($firstmultiletterword > -1)
 921                                 {
 922                                         $arr [ $firstmultiletterword ] = "''";
 923                                         $arr [ $firstmultiletterword-1 ] .= "'";
 924                                 }
 925                                 # ... otherwise use the first one that has neither.
 926                                 # (notice that it is possible for all three to be -1 if, for example,
 927                                 # there is only one pentuple-apostrophe in the line)
 928                                 else if ($firstspace > -1)
 929                                 {
 930                                         $arr [ $firstspace ] = "''";
 931                                         $arr [ $firstspace-1 ] .= "'";
 932                                 }
 933                         }
 934
 935                         # Now let's actually convert our apostrophic mush to HTML!
 936                         $output = '';
 937                         $buffer = '';
 938                         $state = '';
 939                         $i = 0;
 940                         foreach ($arr as $r)
 941                         {
 942                                 if (($i % 2) == 0)
 943                                 {
 944                                         if ($state == 'both')
 945                                                 $buffer .= $r;
 946                                         else
 947                                                 $output .= $r;
 948                                 }
 949                                 else
 950                                 {
 951                                         if (strlen ($r) == 2)
 952                                         {
 953                                                 if ($state == 'i')
 954                                                 { $output .= '</i>'; $state = ''; }
 955                                                 else if ($state == 'bi')
 956                                                 { $output .= '</i>'; $state = 'b'; }
 957                                                 else if ($state == 'ib')
 958                                                 { $output .= '</b></i><b>'; $state = 'b'; }
 959                                                 else if ($state == 'both')
 960                                                 { $output .= '<b><i>'.$buffer.'</i>'; $state = 'b'; }
 961                                                 else # $state can be 'b' or ''
 962                                                 { $output .= '<i>'; $state .= 'i'; }
 963                                         }
 964                                         else if (strlen ($r) == 3)
 965                                         {
 966                                                 if ($state == 'b')
 967                                                 { $output .= '</b>'; $state = ''; }
 968                                                 else if ($state == 'bi')
 969                                                 { $output .= '</i></b><i>'; $state = 'i'; }
 970                                                 else if ($state == 'ib')
 971                                                 { $output .= '</b>'; $state = 'i'; }
 972                                                 else if ($state == 'both')
 973                                                 { $output .= '<i><b>'.$buffer.'</b>'; $state = 'i'; }
 974                                                 else # $state can be 'i' or ''
 975                                                 { $output .= '<b>'; $state .= 'b'; }
 976                                         }
 977                                         else if (strlen ($r) == 5)
 978                                         {
 979                                                 if ($state == 'b')
 980                                                 { $output .= '</b><i>'; $state = 'i'; }
 981                                                 else if ($state == 'i')
 982                                                 { $output .= '</i><b>'; $state = 'b'; }
 983                                                 else if ($state == 'bi')
 984                                                 { $output .= '</i></b>'; $state = ''; }
 985                                                 else if ($state == 'ib')
 986                                                 { $output .= '</b></i>'; $state = ''; }
 987                                                 else if ($state == 'both')
 988                                                 { $output .= '<i><b>'.$buffer.'</b></i>'; $state = ''; }
 989                                                 else # ($state == '')
 990                                                 { $buffer = ''; $state = 'both'; }
 991                                         }
 992                                 }
 993                                 $i++;
 994                         }
 995                         # Now close all remaining tags.  Notice that the order is important.
 996                         if ($state == 'b' || $state == 'ib')
 997                                 $output .= '</b>';
 998                         if ($state == 'i' || $state == 'bi' || $state == 'ib')
 999                                 $output .= '</i>';
1000                         if ($state == 'bi')
1001                                 $output .= '</b>';
1002                         if ($state == 'both')
1003                                 $output .= '<b><i>'.$buffer.'</i></b>';
1004                         return $output;
1005                 }
1006         }
1007
1008         /**
1009          * Replace external links
1010          *
1011          * Note: this is all very hackish and the order of execution matters a lot.
1012          * Make sure to run maintenance/parserTests.php if you change this code.
1013          *
1014          * @access private
1015          */
1016         function replaceExternalLinks( $text ) {
1017                 global $wgContLang;
1018                 $fname = 'Parser::replaceExternalLinks';
1019                 wfProfileIn( $fname );
1020
1021                 $sk =& $this->mOptions->getSkin();
1022
1023                 $bits = preg_split( EXT_LINK_BRACKETED, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1024
1025                 $s = $this->replaceFreeExternalLinks( array_shift( $bits ) );
1026
1027                 $i = 0;
1028                 while ( $i<count( $bits ) ) {
1029                         $url = $bits[$i++];
1030                         $protocol = $bits[$i++];
1031                         $text = $bits[$i++];
1032                         $trail = $bits[$i++];
1033
1034                         # The characters '<' and '>' (which were escaped by
1035                         # removeHTMLtags()) should not be included in
1036                         # URLs, per RFC 2396.
1037                         if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1038                                 $text = substr($url, $m2[0][1]) . ' ' . $text;
1039                                 $url = substr($url, 0, $m2[0][1]);
1040                         }
1041
1042                         # If the link text is an image URL, replace it with an <img> tag
1043                         # This happened by accident in the original parser, but some people used it extensively
1044                         $img = $this->maybeMakeExternalImage( $text );
1045                         if ( $img !== false ) {
1046                                 $text = $img;
1047                         }
1048
1049                         $dtrail = '';
1050
1051                         # Set linktype for CSS - if URL==text, link is essentially free
1052                         $linktype = ($text == $url) ? 'free' : 'text';
1053
1054                         # No link text, e.g. [http://domain.tld/some.link]
1055                         if ( $text == '' ) {
1056                                 # Autonumber if allowed
1057                                 if ( strpos( HTTP_PROTOCOLS, $protocol ) !== false ) {
1058                                         $text = '[' . ++$this->mAutonumber . ']';
1059                                         $linktype = 'autonumber';
1060                                 } else {
1061                                         # Otherwise just use the URL
1062                                         $text = htmlspecialchars( $url );
1063                                         $linktype = 'free';
1064                                 }
1065                         } else {
1066                                 # Have link text, e.g. [http://domain.tld/some.link text]s
1067                                 # Check for trail
1068                                 list( $dtrail, $trail ) = Linker::splitTrail( $trail );
1069                         }
1070
1071                         $text = $wgContLang->markNoConversion($text);
1072
1073                         # Replace &amp; from obsolete syntax with &.
1074                         # All HTML entities will be escaped by makeExternalLink()
1075                         # or maybeMakeExternalImage()
1076                         $url = str_replace( '&amp;', '&', $url );
1077
1078                         # Process the trail (i.e. everything after this link up until start of the next link),
1079                         # replacing any non-bracketed links
1080                         $trail = $this->replaceFreeExternalLinks( $trail );
1081
1082
1083                         # Use the encoded URL
1084                         # This means that users can paste URLs directly into the text
1085                         # Funny characters like &ouml; aren't valid in URLs anyway
1086                         # This was changed in August 2004
1087                         $s .= $sk->makeExternalLink( $url, $text, false, $linktype ) . $dtrail . $trail;
1088                 }
1089
1090                 wfProfileOut( $fname );
1091                 return $s;
1092         }
1093
1094         /**
1095          * Replace anything that looks like a URL with a link
1096          * @access private
1097          */
1098         function replaceFreeExternalLinks( $text ) {
1099                 global $wgContLang;
1100                 $fname = 'Parser::replaceFreeExternalLinks';
1101                 wfProfileIn( $fname );
1102
1103                 $bits = preg_split( '/(\b(?:'.URL_PROTOCOLS.'):)/S', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1104                 $s = array_shift( $bits );
1105                 $i = 0;
1106
1107                 $sk =& $this->mOptions->getSkin();
1108
1109                 while ( $i < count( $bits ) ){
1110                         $protocol = $bits[$i++];
1111                         $remainder = $bits[$i++];
1112
1113                         if ( preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $remainder, $m ) ) {
1114                                 # Found some characters after the protocol that look promising
1115                                 $url = $protocol . $m[1];
1116                                 $trail = $m[2];
1117
1118                                 # The characters '<' and '>' (which were escaped by
1119                                 # removeHTMLtags()) should not be included in
1120                                 # URLs, per RFC 2396.
1121                                 if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1122                                         $trail = substr($url, $m2[0][1]) . $trail;
1123                                         $url = substr($url, 0, $m2[0][1]);
1124                                 }
1125
1126                                 # Move trailing punctuation to $trail
1127                                 $sep = ',;\.:!?';
1128                                 # If there is no left bracket, then consider right brackets fair game too
1129                                 if ( strpos( $url, '(' ) === false ) {
1130                                         $sep .= ')';
1131                                 }
1132
1133                                 $numSepChars = strspn( strrev( $url ), $sep );
1134                                 if ( $numSepChars ) {
1135                                         $trail = substr( $url, -$numSepChars ) . $trail;
1136                                         $url = substr( $url, 0, -$numSepChars );
1137                                 }
1138
1139                                 # Replace &amp; from obsolete syntax with &.
1140                                 # All HTML entities will be escaped by makeExternalLink()
1141                                 # or maybeMakeExternalImage()
1142                                 $url = str_replace( '&amp;', '&', $url );
1143
1144                                 # Is this an external image?
1145                                 $text = $this->maybeMakeExternalImage( $url );
1146                                 if ( $text === false ) {
1147                                         # Not an image, make a link
1148                                         $text = $sk->makeExternalLink( $url, $wgContLang->markNoConversion($url), true, 'free' );
1149                                 }
1150                                 $s .= $text . $trail;
1151                         } else {
1152                                 $s .= $protocol . $remainder;
1153                         }
1154                 }
1155                 wfProfileOut();
1156                 return $s;
1157         }
1158
1159         /**
1160          * make an image if it's allowed
1161          * @access private
1162          */
1163         function maybeMakeExternalImage( $url ) {
1164                 $sk =& $this->mOptions->getSkin();
1165                 $text = false;
1166                 if ( $this->mOptions->getAllowExternalImages() ) {
1167                         if ( preg_match( EXT_IMAGE_REGEX, $url ) ) {
1168                                 # Image found
1169                                 $text = $sk->makeExternalImage( htmlspecialchars( $url ) );
1170                         }
1171                 }
1172                 return $text;
1173         }
1174
1175         /**
1176          * Process [[ ]] wikilinks
1177          *
1178          * @access private
1179          */
1180         function replaceInternalLinks( $s ) {
1181                 global $wgContLang, $wgLinkCache;
1182                 static $fname = 'Parser::replaceInternalLinks' ;
1183
1184                 wfProfileIn( $fname );
1185
1186                 wfProfileIn( $fname.'-setup' );
1187                 static $tc = FALSE;
1188                 # the % is needed to support urlencoded titles as well
1189                 if ( !$tc ) { $tc = Title::legalChars() . '#%'; }
1190
1191                 $sk =& $this->mOptions->getSkin();
1192
1193                 #split the entire text string on occurences of [[
1194                 $a = explode( '[[', ' ' . $s );
1195                 #get the first element (all text up to first [[), and remove the space we added
1196                 $s = array_shift( $a );
1197                 $s = substr( $s, 1 );
1198
1199                 # Match a link having the form [[namespace:link|alternate]]trail
1200                 static $e1 = FALSE;
1201                 if ( !$e1 ) { $e1 = "/^([{$tc}]+)(?:\\|(.+?))?]](.*)\$/sD"; }
1202                 # Match cases where there is no "]]", which might still be images
1203                 static $e1_img = FALSE;
1204                 if ( !$e1_img ) { $e1_img = "/^([{$tc}]+)\\|(.*)\$/sD"; }
1205                 # Match the end of a line for a word that's not followed by whitespace,
1206                 # e.g. in the case of 'The Arab al[[Razi]]', 'al' will be matched
1207                 static $e2 = '/^(.*?)([a-zA-Z\x80-\xff]+)$/sD';
1208
1209                 $useLinkPrefixExtension = $wgContLang->linkPrefixExtension();
1210
1211                 if( is_null( $this->mTitle ) ) {
1212                         wfDebugDieBacktrace( 'nooo' );
1213                 }
1214                 $nottalk = !$this->mTitle->isTalkPage();
1215
1216                 if ( $useLinkPrefixExtension ) {
1217                         if ( preg_match( $e2, $s, $m ) ) {
1218                                 $first_prefix = $m[2];
1219                                 $s = $m[1];
1220                         } else {
1221                                 $first_prefix = false;
1222                         }
1223                 } else {
1224                         $prefix = '';
1225                 }
1226
1227                 $selflink = $this->mTitle->getPrefixedText();
1228                 wfProfileOut( $fname.'-setup' );
1229
1230                 $checkVariantLink = sizeof($wgContLang->getVariants())>1;
1231                 $useSubpages = $this->areSubpagesAllowed();
1232
1233                 # Loop for each link
1234                 for ($k = 0; isset( $a[$k] ); $k++) {
1235                         $line = $a[$k];
1236                         if ( $useLinkPrefixExtension ) {
1237                                 wfProfileIn( $fname.'-prefixhandling' );
1238                                 if ( preg_match( $e2, $s, $m ) ) {
1239                                         $prefix = $m[2];
1240                                         $s = $m[1];
1241                                 } else {
1242                                         $prefix='';
1243                                 }
1244                                 # first link
1245                                 if($first_prefix) {
1246                                         $prefix = $first_prefix;
1247                                         $first_prefix = false;
1248                                 }
1249                                 wfProfileOut( $fname.'-prefixhandling' );
1250                         }
1251
1252                         $might_be_img = false;
1253
1254                         if ( preg_match( $e1, $line, $m ) ) { # page with normal text or alt
1255                                 $text = $m[2];
1256                                 # If we get a ] at the beginning of $m[3] that means we have a link that's something like:
1257                                 # [[Image:Foo.jpg|[http://example.com desc]]] <- having three ] in a row fucks up,
1258                                 # the real problem is with the $e1 regex
1259                                 # See bug 1300.
1260                                 #
1261                                 # Still some problems for cases where the ] is meant to be outside punctuation,
1262                                 # and no image is in sight. See bug 2095.
1263                                 #
1264                                 if( $text !== '' && preg_match( "/^\](.*)/s", $m[3], $n ) ) {
1265                                         $text .= ']'; # so that replaceExternalLinks($text) works later
1266                                         $m[3] = $n[1];
1267                                 }
1268                                 # fix up urlencoded title texts
1269                                 if(preg_match('/%/', $m[1] )) $m[1] = urldecode($m[1]);
1270                                 $trail = $m[3];
1271                         } elseif( preg_match($e1_img, $line, $m) ) { # Invalid, but might be an image with a link in its caption
1272                                 $might_be_img = true;
1273                                 $text = $m[2];
1274                                 if(preg_match('/%/', $m[1] )) $m[1] = urldecode($m[1]);
1275                                 $trail = "";
1276                         } else { # Invalid form; output directly
1277                                 $s .= $prefix . '[[' . $line ;
1278                                 continue;
1279                         }
1280
1281                         # Don't allow internal links to pages containing
1282                         # PROTO: where PROTO is a valid URL protocol; these
1283                         # should be external links.
1284                         if (preg_match('/^(\b(?:'.URL_PROTOCOLS.'):)/', $m[1])) {
1285                                 $s .= $prefix . '[[' . $line ;
1286                                 continue;
1287                         }
1288
1289                         # Make subpage if necessary
1290                         if( $useSubpages ) {
1291                                 $link = $this->maybeDoSubpageLink( $m[1], $text );
1292                         } else {
1293                                 $link = $m[1];
1294                         }
1295
1296                         $noforce = (substr($m[1], 0, 1) != ':');
1297                         if (!$noforce) {
1298                                 # Strip off leading ':'
1299                                 $link = substr($link, 1);
1300                         }
1301
1302                         $nt =& Title::newFromText( $this->unstripNoWiki($link, $this->mStripState) );
1303                         if( !$nt ) {
1304                                 $s .= $prefix . '[[' . $line;
1305                                 continue;
1306                         }
1307
1308                         #check other language variants of the link
1309                         #if the article does not exist
1310                         if( $checkVariantLink
1311                             && $nt->getArticleID() == 0 ) {
1312                                 $wgContLang->findVariantLink($link, $nt);
1313                         }
1314
1315                         $ns = $nt->getNamespace();
1316                         $iw = $nt->getInterWiki();
1317
1318                         if ($might_be_img) { # if this is actually an invalid link
1319                                 if ($ns == NS_IMAGE && $noforce) { #but might be an image
1320                                         $found = false;
1321                                         while (isset ($a[$k+1]) ) {
1322                                                 #look at the next 'line' to see if we can close it there
1323                                                 $next_line =  array_shift(array_splice( $a, $k + 1, 1) );
1324                                                 if( preg_match("/^(.*?]].*?)]](.*)$/sD", $next_line, $m) ) {
1325                                                 # the first ]] closes the inner link, the second the image
1326                                                         $found = true;
1327                                                         $text .= '[[' . $m[1];
1328                                                         $trail = $m[2];
1329                                                         break;
1330                                                 } elseif( preg_match("/^.*?]].*$/sD", $next_line, $m) ) {
1331                                                         #if there's exactly one ]] that's fine, we'll keep looking
1332                                                         $text .= '[[' . $m[0];
1333                                                 } else {
1334                                                         #if $next_line is invalid too, we need look no further
1335                                                         $text .= '[[' . $next_line;
1336                                                         break;
1337                                                 }
1338                                         }
1339                                         if ( !$found ) {
1340                                                 # we couldn't find the end of this imageLink, so output it raw
1341                                                 #but don't ignore what might be perfectly normal links in the text we've examined
1342                                                 $text = $this->replaceInternalLinks($text);
1343                                                 $s .= $prefix . '[[' . $link . '|' . $text;
1344                                                 # note: no $trail, because without an end, there *is* no trail
1345                                                 continue;
1346                                         }
1347                                 } else { #it's not an image, so output it raw
1348                                         $s .= $prefix . '[[' . $link . '|' . $text;
1349                                         # note: no $trail, because without an end, there *is* no trail
1350                                         continue;
1351                                 }
1352                         }
1353
1354                         $wasblank = ( '' == $text );
1355                         if( $wasblank ) $text = $link;
1356
1357
1358                         # Link not escaped by : , create the various objects
1359                         if( $noforce ) {
1360
1361                                 # Interwikis
1362                                 if( $iw && $this->mOptions->getInterwikiMagic() && $nottalk && $wgContLang->getLanguageName( $iw ) ) {
1363                                         array_push( $this->mOutput->mLanguageLinks, $nt->getFullText() );
1364                                         $s = rtrim($s . "\n");
1365                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1366                                         continue;
1367                                 }
1368
1369                                 if ( $ns == NS_IMAGE ) {
1370                                         wfProfileIn( "$fname-image" );
1371                                         if ( !wfIsBadImage( $nt->getDBkey() ) ) {
1372                                                 # recursively parse links inside the image caption
1373                                                 # actually, this will parse them in any other parameters, too,
1374                                                 # but it might be hard to fix that, and it doesn't matter ATM
1375                                                 $text = $this->replaceExternalLinks($text);
1376                                                 $text = $this->replaceInternalLinks($text);
1377
1378                                                 # cloak any absolute URLs inside the image markup, so replaceExternalLinks() won't touch them
1379                                                 $s .= $prefix . str_replace('http://', 'http-noparse://', $this->makeImage( $nt, $text ) ) . $trail;
1380                                                 $wgLinkCache->addImageLinkObj( $nt );
1381
1382                                                 wfProfileOut( "$fname-image" );
1383                                                 continue;
1384                                         }
1385                                         wfProfileOut( "$fname-image" );
1386
1387                                 }
1388
1389                                 if ( $ns == NS_CATEGORY ) {
1390                                         wfProfileIn( "$fname-category" );
1391                                         $t = $wgContLang->convert($nt->getText());
1392                                         $s = rtrim($s . "\n"); # bug 87
1393
1394                                         $wgLinkCache->suspend(); # Don't save in links/brokenlinks
1395                                         $t = $sk->makeLinkObj( $nt, $t, '', '' , $prefix );
1396                                         $wgLinkCache->resume();
1397
1398                                         if ( $wasblank ) {
1399                                                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1400                                                         $sortkey = $this->mTitle->getText();
1401                                                 } else {
1402                                                         $sortkey = $this->mTitle->getPrefixedText();
1403                                                 }
1404                                         } else {
1405                                                 $sortkey = $text;
1406                                         }
1407                                         $sortkey = $wgContLang->convertCategoryKey( $sortkey );
1408                                         $wgLinkCache->addCategoryLinkObj( $nt, $sortkey );
1409                                         $this->mOutput->addCategoryLink( $t );
1410
1411                                         /**
1412                                          * Strip the whitespace Category links produce, see bug 87
1413                                          * @todo We might want to use trim($tmp, "\n") here.
1414                                          */
1415                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1416
1417                                         wfProfileOut( "$fname-category" );
1418                                         continue;
1419                                 }
1420                         }
1421
1422                         if( ( $nt->getPrefixedText() === $selflink ) &&
1423                             ( $nt->getFragment() === '' ) ) {
1424                                 # Self-links are handled specially; generally de-link and change to bold.
1425                                 $s .= $prefix . $sk->makeSelfLinkObj( $nt, $text, '', $trail );
1426                                 continue;
1427                         }
1428
1429                         # Special and Media are pseudo-namespaces; no pages actually exist in them
1430                         if( $ns == NS_MEDIA ) {
1431                                 $s .= $prefix . $sk->makeMediaLinkObj( $nt, $text, true ) . $trail;
1432                                 $wgLinkCache->addImageLinkObj( $nt );
1433                                 continue;
1434                         } elseif( $ns == NS_SPECIAL ) {
1435                                 $s .= $prefix . $sk->makeKnownLinkObj( $nt, $text, '', $trail );
1436                                 continue;
1437                         }
1438                         if ( $nt->isAlwaysKnown() ) {
1439                                 $s .= $sk->makeKnownLinkObj( $nt, $text, '', $trail, $prefix );
1440                         } else {
1441                                 /**
1442                                  * Add a link placeholder
1443                                  * Later, this will be replaced by a real link, after the existence or
1444                                  * non-existence of all the links is known
1445                                  */
1446                                 $s .= $this->makeLinkHolder( $nt, $text, '', $trail, $prefix );
1447                         }
1448                 }
1449                 wfProfileOut( $fname );
1450                 return $s;
1451         }
1452
1453         /**
1454          * Make a link placeholder. The text returned can be later resolved to a real link with
1455          * replaceLinkHolders(). This is done for two reasons: firstly to avoid further
1456          * parsing of interwiki links, and secondly to allow all extistence checks and
1457          * article length checks (for stub links) to be bundled into a single query.
1458          *
1459          */
1460         function makeLinkHolder( &$nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1461                 if ( ! is_object($nt) ) {
1462                         # Fail gracefully
1463                         $retVal = "<!-- ERROR -->{$prefix}{$text}{$trail}";
1464                 } else {
1465                         # Separate the link trail from the rest of the link
1466                         list( $inside, $trail ) = Linker::splitTrail( $trail );
1467
1468                         if ( $nt->isExternal() ) {
1469                                 $nr = array_push( $this->mInterwikiLinkHolders['texts'], $prefix.$text.$inside );
1470                                 $this->mInterwikiLinkHolders['titles'][] =& $nt;
1471                                 $retVal = '<!--IWLINK '. ($nr-1) ."-->{$trail}";
1472                         } else {
1473                                 $nr = array_push( $this->mLinkHolders['namespaces'], $nt->getNamespace() );
1474                                 $this->mLinkHolders['dbkeys'][] = $nt->getDBkey();
1475                                 $this->mLinkHolders['queries'][] = $query;
1476                                 $this->mLinkHolders['texts'][] = $prefix.$text.$inside;
1477                                 $this->mLinkHolders['titles'][] =& $nt;
1478
1479                                 $retVal = '<!--LINK '. ($nr-1) ."-->{$trail}";
1480                         }
1481                 }
1482                 return $retVal;
1483         }
1484
1485         /**
1486          * Return true if subpage links should be expanded on this page.
1487          * @return bool
1488          */
1489         function areSubpagesAllowed() {
1490                 # Some namespaces don't allow subpages
1491                 global $wgNamespacesWithSubpages;
1492                 return !empty($wgNamespacesWithSubpages[$this->mTitle->getNamespace()]);
1493         }
1494
1495         /**
1496          * Handle link to subpage if necessary
1497          * @param string $target the source of the link
1498          * @param string &$text the link text, modified as necessary
1499          * @return string the full name of the link
1500          * @access private
1501          */
1502         function maybeDoSubpageLink($target, &$text) {
1503                 # Valid link forms:
1504                 # Foobar -- normal
1505                 # :Foobar -- override special treatment of prefix (images, language links)
1506                 # /Foobar -- convert to CurrentPage/Foobar
1507                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1508                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1509                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1510
1511                 $fname = 'Parser::maybeDoSubpageLink';
1512                 wfProfileIn( $fname );
1513                 $ret = $target; # default return value is no change
1514
1515                 # Some namespaces don't allow subpages,
1516                 # so only perform processing if subpages are allowed
1517                 if( $this->areSubpagesAllowed() ) {
1518                         # Look at the first character
1519                         if( $target != '' && $target{0} == '/' ) {
1520                                 # / at end means we don't want the slash to be shown
1521                                 if( substr( $target, -1, 1 ) == '/' ) {
1522                                         $target = substr( $target, 1, -1 );
1523                                         $noslash = $target;
1524                                 } else {
1525                                         $noslash = substr( $target, 1 );
1526                                 }
1527
1528                                 $ret = $this->mTitle->getPrefixedText(). '/' . trim($noslash);
1529                                 if( '' === $text ) {
1530                                         $text = $target;
1531                                 } # this might be changed for ugliness reasons
1532                         } else {
1533                                 # check for .. subpage backlinks
1534                                 $dotdotcount = 0;
1535                                 $nodotdot = $target;
1536                                 while( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1537                                         ++$dotdotcount;
1538                                         $nodotdot = substr( $nodotdot, 3 );
1539                                 }
1540                                 if($dotdotcount > 0) {
1541                                         $exploded = explode( '/', $this->mTitle->GetPrefixedText() );
1542                                         if( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1543                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1544                                                 # / at the end means don't show full path
1545                                                 if( substr( $nodotdot, -1, 1 ) == '/' ) {
1546                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1547                                                         if( '' === $text ) {
1548                                                                 $text = $nodotdot;
1549                                                         }
1550                                                 }
1551                                                 $nodotdot = trim( $nodotdot );
1552                                                 if( $nodotdot != '' ) {
1553                                                         $ret .= '/' . $nodotdot;
1554                                                 }
1555                                         }
1556                                 }
1557                         }
1558                 }
1559
1560                 wfProfileOut( $fname );
1561                 return $ret;
1562         }
1563
1564         /**#@+
1565          * Used by doBlockLevels()
1566          * @access private
1567          */
1568         /* private */ function closeParagraph() {
1569                 $result = '';
1570                 if ( '' != $this->mLastSection ) {
1571                         $result = '</' . $this->mLastSection  . ">\n";
1572                 }
1573                 $this->mInPre = false;
1574                 $this->mLastSection = '';
1575                 return $result;
1576         }
1577         # getCommon() returns the length of the longest common substring
1578         # of both arguments, starting at the beginning of both.
1579         #
1580         /* private */ function getCommon( $st1, $st2 ) {
1581                 $fl = strlen( $st1 );
1582                 $shorter = strlen( $st2 );
1583                 if ( $fl < $shorter ) { $shorter = $fl; }
1584
1585                 for ( $i = 0; $i < $shorter; ++$i ) {
1586                         if ( $st1{$i} != $st2{$i} ) { break; }
1587                 }
1588                 return $i;
1589         }
1590         # These next three functions open, continue, and close the list
1591         # element appropriate to the prefix character passed into them.
1592         #
1593         /* private */ function openList( $char ) {
1594                 $result = $this->closeParagraph();
1595
1596                 if ( '*' == $char ) { $result .= '<ul><li>'; }
1597                 else if ( '#' == $char ) { $result .= '<ol><li>'; }
1598                 else if ( ':' == $char ) { $result .= '<dl><dd>'; }
1599                 else if ( ';' == $char ) {
1600                         $result .= '<dl><dt>';
1601                         $this->mDTopen = true;
1602                 }
1603                 else { $result = '<!-- ERR 1 -->'; }
1604
1605                 return $result;
1606         }
1607
1608         /* private */ function nextItem( $char ) {
1609                 if ( '*' == $char || '#' == $char ) { return '</li><li>'; }
1610                 else if ( ':' == $char || ';' == $char ) {
1611                         $close = '</dd>';
1612                         if ( $this->mDTopen ) { $close = '</dt>'; }
1613                         if ( ';' == $char ) {
1614                                 $this->mDTopen = true;
1615                                 return $close . '<dt>';
1616                         } else {
1617                                 $this->mDTopen = false;
1618                                 return $close . '<dd>';
1619                         }
1620                 }
1621                 return '<!-- ERR 2 -->';
1622         }
1623
1624         /* private */ function closeList( $char ) {
1625                 if ( '*' == $char ) { $text = '</li></ul>'; }
1626                 else if ( '#' == $char ) { $text = '</li></ol>'; }
1627                 else if ( ':' == $char ) {
1628                         if ( $this->mDTopen ) {
1629                                 $this->mDTopen = false;
1630                                 $text = '</dt></dl>';
1631                         } else {
1632                                 $text = '</dd></dl>';
1633                         }
1634                 }
1635                 else {  return '<!-- ERR 3 -->'; }
1636                 return $text."\n";
1637         }
1638         /**#@-*/
1639
1640         /**
1641          * Make lists from lines starting with ':', '*', '#', etc.
1642          *
1643          * @access private
1644          * @return string the lists rendered as HTML
1645          */
1646         function doBlockLevels( $text, $linestart ) {
1647                 $fname = 'Parser::doBlockLevels';
1648                 wfProfileIn( $fname );
1649
1650                 # Parsing through the text line by line.  The main thing
1651                 # happening here is handling of block-level elements p, pre,
1652                 # and making lists from lines starting with * # : etc.
1653                 #
1654                 $textLines = explode( "\n", $text );
1655
1656                 $lastPrefix = $output = '';
1657                 $this->mDTopen = $inBlockElem = false;
1658                 $prefixLength = 0;
1659                 $paragraphStack = false;
1660
1661                 if ( !$linestart ) {
1662                         $output .= array_shift( $textLines );
1663                 }
1664                 foreach ( $textLines as $oLine ) {
1665                         $lastPrefixLength = strlen( $lastPrefix );
1666                         $preCloseMatch = preg_match('/<\\/pre/i', $oLine );
1667                         $preOpenMatch = preg_match('/<pre/i', $oLine );
1668                         if ( !$this->mInPre ) {
1669                                 # Multiple prefixes may abut each other for nested lists.
1670                                 $prefixLength = strspn( $oLine, '*#:;' );
1671                                 $pref = substr( $oLine, 0, $prefixLength );
1672
1673                                 # eh?
1674                                 $pref2 = str_replace( ';', ':', $pref );
1675                                 $t = substr( $oLine, $prefixLength );
1676                                 $this->mInPre = !empty($preOpenMatch);
1677                         } else {
1678                                 # Don't interpret any other prefixes in preformatted text
1679                                 $prefixLength = 0;
1680                                 $pref = $pref2 = '';
1681                                 $t = $oLine;
1682                         }
1683
1684                         # List generation
1685                         if( $prefixLength && 0 == strcmp( $lastPrefix, $pref2 ) ) {
1686                                 # Same as the last item, so no need to deal with nesting or opening stuff
1687                                 $output .= $this->nextItem( substr( $pref, -1 ) );
1688                                 $paragraphStack = false;
1689
1690                                 if ( substr( $pref, -1 ) == ';') {
1691                                         # The one nasty exception: definition lists work like this:
1692                                         # ; title : definition text
1693                                         # So we check for : in the remainder text to split up the
1694                                         # title and definition, without b0rking links.
1695                                         $term = $t2 = '';
1696                                         if ($this->findColonNoLinks($t, $term, $t2) !== false) {
1697                                                 $t = $t2;
1698                                                 $output .= $term . $this->nextItem( ':' );
1699                                         }
1700                                 }
1701                         } elseif( $prefixLength || $lastPrefixLength ) {
1702                                 # Either open or close a level...
1703                                 $commonPrefixLength = $this->getCommon( $pref, $lastPrefix );
1704                                 $paragraphStack = false;
1705
1706                                 while( $commonPrefixLength < $lastPrefixLength ) {
1707                                         $output .= $this->closeList( $lastPrefix{$lastPrefixLength-1} );
1708                                         --$lastPrefixLength;
1709                                 }
1710                                 if ( $prefixLength <= $commonPrefixLength && $commonPrefixLength > 0 ) {
1711                                         $output .= $this->nextItem( $pref{$commonPrefixLength-1} );
1712                                 }
1713                                 while ( $prefixLength > $commonPrefixLength ) {
1714                                         $char = substr( $pref, $commonPrefixLength, 1 );
1715                                         $output .= $this->openList( $char );
1716
1717                                         if ( ';' == $char ) {
1718                                                 # FIXME: This is dupe of code above
1719                                                 if ($this->findColonNoLinks($t, $term, $t2) !== false) {
1720                                                         $t = $t2;
1721                                                         $output .= $term . $this->nextItem( ':' );
1722                                                 }
1723                                         }
1724                                         ++$commonPrefixLength;
1725                                 }
1726                                 $lastPrefix = $pref2;
1727                         }
1728                         if( 0 == $prefixLength ) {
1729                                 wfProfileIn( "$fname-paragraph" );
1730                                 # No prefix (not in list)--go to paragraph mode
1731                                 $uniq_prefix = UNIQ_PREFIX;
1732                                 // XXX: use a stack for nestable elements like span, table and div
1733                                 $openmatch = preg_match('/(<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<pre|<tr|<p|<ul|<li|<\\/tr|<\\/td|<\\/th)/iS', $t );
1734                                 $closematch = preg_match(
1735                                         '/(<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6|'.
1736                                         '<td|<th|<div|<\\/div|<hr|<\\/pre|<\\/p|'.$uniq_prefix.'-pre|<\\/li|<\\/ul)/iS', $t );
1737                                 if ( $openmatch or $closematch ) {
1738                                         $paragraphStack = false;
1739                                         $output .= $this->closeParagraph();
1740                                         if($preOpenMatch and !$preCloseMatch) {
1741                                                 $this->mInPre = true;
1742                                         }
1743                                         if ( $closematch ) {
1744                                                 $inBlockElem = false;
1745                                         } else {
1746                                                 $inBlockElem = true;
1747                                         }
1748                                 } else if ( !$inBlockElem && !$this->mInPre ) {
1749                                         if ( ' ' == $t{0} and ( $this->mLastSection == 'pre' or trim($t) != '' ) ) {
1750                                                 // pre
1751                                                 if ($this->mLastSection != 'pre') {
1752                                                         $paragraphStack = false;
1753                                                         $output .= $this->closeParagraph().'<pre>';
1754                                                         $this->mLastSection = 'pre';
1755                                                 }
1756                                                 $t = substr( $t, 1 );
1757                                         } else {
1758                                                 // paragraph
1759                                                 if ( '' == trim($t) ) {
1760                                                         if ( $paragraphStack ) {
1761                                                                 $output .= $paragraphStack.'<br />';
1762                                                                 $paragraphStack = false;
1763                                                                 $this->mLastSection = 'p';
1764                                                         } else {
1765                                                                 if ($this->mLastSection != 'p' ) {
1766                                                                         $output .= $this->closeParagraph();
1767                                                                         $this->mLastSection = '';
1768                                                                         $paragraphStack = '<p>';
1769                                                                 } else {
1770                                                                         $paragraphStack = '</p><p>';
1771                                                                 }
1772                                                         }
1773                                                 } else {
1774                                                         if ( $paragraphStack ) {
1775                                                                 $output .= $paragraphStack;
1776                                                                 $paragraphStack = false;
1777                                                                 $this->mLastSection = 'p';
1778                                                         } else if ($this->mLastSection != 'p') {
1779                                                                 $output .= $this->closeParagraph().'<p>';
1780                                                                 $this->mLastSection = 'p';
1781                                                         }
1782                                                 }
1783                                         }
1784                                 }
1785                                 wfProfileOut( "$fname-paragraph" );
1786                         }
1787                         if ($paragraphStack === false) {
1788                                 $output .= $t."\n";
1789                         }
1790                 }
1791                 while ( $prefixLength ) {
1792                         $output .= $this->closeList( $pref2{$prefixLength-1} );
1793                         --$prefixLength;
1794                 }
1795                 if ( '' != $this->mLastSection ) {
1796                         $output .= '</' . $this->mLastSection . '>';
1797                         $this->mLastSection = '';
1798                 }
1799
1800                 wfProfileOut( $fname );
1801                 return $output;
1802         }
1803
1804         /**
1805          * Split up a string on ':', ignoring any occurences inside
1806          * <a>..</a> or <span>...</span>
1807          * @param string $str the string to split
1808          * @param string &$before set to everything before the ':'
1809          * @param string &$after set to everything after the ':'
1810          * return string the position of the ':', or false if none found
1811          */
1812         function findColonNoLinks($str, &$before, &$after) {
1813                 # I wonder if we should make this count all tags, not just <a>
1814                 # and <span>. That would prevent us from matching a ':' that
1815                 # comes in the middle of italics other such formatting....
1816                 # -- Wil
1817                 $fname = 'Parser::findColonNoLinks';
1818                 wfProfileIn( $fname );
1819                 $pos = 0;
1820                 do {
1821                         $colon = strpos($str, ':', $pos);
1822
1823                         if ($colon !== false) {
1824                                 $before = substr($str, 0, $colon);
1825                                 $after = substr($str, $colon + 1);
1826
1827                                 # Skip any ':' within <a> or <span> pairs
1828                                 $a = substr_count($before, '<a');
1829                                 $s = substr_count($before, '<span');
1830                                 $ca = substr_count($before, '</a>');
1831                                 $cs = substr_count($before, '</span>');
1832
1833                                 if ($a <= $ca and $s <= $cs) {
1834                                         # Tags are balanced before ':'; ok
1835                                         break;
1836                                 }
1837                                 $pos = $colon + 1;
1838                         }
1839                 } while ($colon !== false);
1840                 wfProfileOut( $fname );
1841                 return $colon;
1842         }
1843
1844         /**
1845          * Return value of a magic variable (like PAGENAME)
1846          *
1847          * @access private
1848          */
1849         function getVariableValue( $index ) {
1850                 global $wgContLang, $wgSitename, $wgServer, $wgArticle;
1851
1852                 /**
1853                  * Some of these require message or data lookups and can be
1854                  * expensive to check many times.
1855                  */
1856                 static $varCache = array();
1857                 if( isset( $varCache[$index] ) ) return $varCache[$index];
1858
1859                 switch ( $index ) {
1860                         case MAG_CURRENTMONTH:
1861                                 return $varCache[$index] = $wgContLang->formatNum( date( 'm' ) );
1862                         case MAG_CURRENTMONTHNAME:
1863                                 return $varCache[$index] = $wgContLang->getMonthName( date('n') );
1864                         case MAG_CURRENTMONTHNAMEGEN:
1865                                 return $varCache[$index] = $wgContLang->getMonthNameGen( date('n') );
1866                         case MAG_CURRENTMONTHABBREV:
1867                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( date('n') );
1868                         case MAG_CURRENTDAY:
1869                                 return $varCache[$index] = $wgContLang->formatNum( date('j') );
1870                         case MAG_PAGENAME:
1871                                 return $this->mTitle->getText();
1872                         case MAG_PAGENAMEE:
1873                                 return $this->mTitle->getPartialURL();
1874                         case MAG_REVISIONID:
1875                                 return $wgArticle->getRevIdFetched();
1876                         case MAG_NAMESPACE:
1877                                 # return Namespace::getCanonicalName($this->mTitle->getNamespace());
1878                                 return $wgContLang->getNsText($this->mTitle->getNamespace()); # Patch by Dori
1879                         case MAG_CURRENTDAYNAME:
1880                                 return $varCache[$index] = $wgContLang->getWeekdayName( date('w')+1 );
1881                         case MAG_CURRENTYEAR:
1882                                 return $varCache[$index] = $wgContLang->formatNum( date( 'Y' ), true );
1883                         case MAG_CURRENTTIME:
1884                                 return $varCache[$index] = $wgContLang->time( wfTimestampNow(), false );
1885                         case MAG_CURRENTWEEK:
1886                                 return $varCache[$index] = $wgContLang->formatNum( date('W') );
1887                         case MAG_CURRENTDOW:
1888                                 return $varCache[$index] = $wgContLang->formatNum( date('w') );
1889                         case MAG_NUMBEROFARTICLES:
1890                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfArticles() );
1891                         case MAG_SITENAME:
1892                                 return $wgSitename;
1893                         case MAG_SERVER:
1894                                 return $wgServer;
1895                         default:
1896                                 return NULL;
1897                 }
1898         }
1899
1900         /**
1901          * initialise the magic variables (like CURRENTMONTHNAME)
1902          *
1903          * @access private
1904          */
1905         function initialiseVariables() {
1906                 $fname = 'Parser::initialiseVariables';
1907                 wfProfileIn( $fname );
1908                 global $wgVariableIDs;
1909                 $this->mVariables = array();
1910                 foreach ( $wgVariableIDs as $id ) {
1911                         $mw =& MagicWord::get( $id );
1912                         $mw->addToArray( $this->mVariables, $id );
1913                 }
1914                 wfProfileOut( $fname );
1915         }
1916
1917         /**
1918          * Replace magic variables, templates, and template arguments
1919          * with the appropriate text. Templates are substituted recursively,
1920          * taking care to avoid infinite loops.
1921          *
1922          * Note that the substitution depends on value of $mOutputType:
1923          *  OT_WIKI: only {{subst:}} templates
1924          *  OT_MSG: only magic variables
1925          *  OT_HTML: all templates and magic variables
1926          *
1927          * @param string $tex The text to transform
1928          * @param array $args Key-value pairs representing template parameters to substitute
1929          * @access private
1930          */
1931         function replaceVariables( $text, $args = array() ) {
1932
1933                 # Prevent too big inclusions
1934                 if( strlen( $text ) > MAX_INCLUDE_SIZE ) {
1935                         return $text;
1936                 }
1937
1938                 $fname = 'Parser::replaceVariables';
1939                 wfProfileIn( $fname );
1940
1941                 $titleChars = Title::legalChars();
1942
1943                 # This function is called recursively. To keep track of arguments we need a stack:
1944                 array_push( $this->mArgStack, $args );
1945
1946                 # Variable substitution
1947                 $text = preg_replace_callback( "/{{([$titleChars]*?)}}/", array( &$this, 'variableSubstitution' ), $text );
1948
1949                 if ( $this->mOutputType == OT_HTML || $this->mOutputType == OT_WIKI ) {
1950                         # Argument substitution
1951                         $text = preg_replace_callback( "/{{{([$titleChars]*?)}}}/", array( &$this, 'argSubstitution' ), $text );
1952                 }
1953                 # Template substitution
1954                 $regex = '/(\\n|{)?{{(['.$titleChars.']*)(\\|.*?|)}}/s';
1955                 $text = preg_replace_callback( $regex, array( &$this, 'braceSubstitution' ), $text );
1956
1957                 array_pop( $this->mArgStack );
1958
1959                 wfProfileOut( $fname );
1960                 return $text;
1961         }
1962
1963         /**
1964          * Replace magic variables
1965          * @access private
1966          */
1967         function variableSubstitution( $matches ) {
1968                 $fname = 'parser::variableSubstitution';
1969                 $varname = $matches[1];
1970                 wfProfileIn( $fname );
1971                 if ( !$this->mVariables ) {
1972                         $this->initialiseVariables();
1973                 }
1974                 $skip = false;
1975                 if ( $this->mOutputType == OT_WIKI ) {
1976                         # Do only magic variables prefixed by SUBST
1977                         $mwSubst =& MagicWord::get( MAG_SUBST );
1978                         if (!$mwSubst->matchStartAndRemove( $varname ))
1979                                 $skip = true;
1980                         # Note that if we don't substitute the variable below,
1981                         # we don't remove the {{subst:}} magic word, in case
1982                         # it is a template rather than a magic variable.
1983                 }
1984                 if ( !$skip && array_key_exists( $varname, $this->mVariables ) ) {
1985                         $id = $this->mVariables[$varname];
1986                         $text = $this->getVariableValue( $id );
1987                         $this->mOutput->mContainsOldMagic = true;
1988                 } else {
1989                         $text = $matches[0];
1990                 }
1991                 wfProfileOut( $fname );
1992                 return $text;
1993         }
1994
1995         # Split template arguments
1996         function getTemplateArgs( $argsString ) {
1997                 if ( $argsString === '' ) {
1998                         return array();
1999                 }
2000
2001                 $args = explode( '|', substr( $argsString, 1 ) );
2002
2003                 # If any of the arguments contains a '[[' but no ']]', it needs to be
2004                 # merged with the next arg because the '|' character between belongs
2005                 # to the link syntax and not the template parameter syntax.
2006                 $argc = count($args);
2007
2008                 for ( $i = 0; $i < $argc-1; $i++ ) {
2009                         if ( substr_count ( $args[$i], '[[' ) != substr_count ( $args[$i], ']]' ) ) {
2010                                 $args[$i] .= '|'.$args[$i+1];
2011                                 array_splice($args, $i+1, 1);
2012                                 $i--;
2013                                 $argc--;
2014                         }
2015                 }
2016
2017                 return $args;
2018         }
2019
2020         /**
2021          * Return the text of a template, after recursively
2022          * replacing any variables or templates within the template.
2023          *
2024          * @param array $matches The parts of the template
2025          *  $matches[1]: the title, i.e. the part before the |
2026          *  $matches[2]: the parameters (including a leading |), if  any
2027          * @return string the text of the template
2028          * @access private
2029          */
2030         function braceSubstitution( $matches ) {
2031                 global $wgLinkCache, $wgContLang;
2032                 $fname = 'Parser::braceSubstitution';
2033                 wfProfileIn( $fname );
2034
2035                 $found = false;
2036                 $nowiki = false;
2037                 $noparse = false;
2038
2039                 $title = NULL;
2040
2041                 # Need to know if the template comes at the start of a line,
2042                 # to treat the beginning of the template like the beginning
2043                 # of a line for tables and block-level elements.
2044                 $linestart = $matches[1];
2045
2046                 # $part1 is the bit before the first |, and must contain only title characters
2047                 # $args is a list of arguments, starting from index 0, not including $part1
2048
2049                 $part1 = $matches[2];
2050                 # If the third subpattern matched anything, it will start with |
2051
2052                 $args = $this->getTemplateArgs($matches[3]);
2053                 $argc = count( $args );
2054
2055                 # Don't parse {{{}}} because that's only for template arguments
2056                 if ( $linestart === '{' ) {
2057                         $text = $matches[0];
2058                         $found = true;
2059                         $noparse = true;
2060                 }
2061
2062                 # SUBST
2063                 if ( !$found ) {
2064                         $mwSubst =& MagicWord::get( MAG_SUBST );
2065                         if ( $mwSubst->matchStartAndRemove( $part1 ) xor ($this->mOutputType == OT_WIKI) ) {
2066                                 # One of two possibilities is true:
2067                                 # 1) Found SUBST but not in the PST phase
2068                                 # 2) Didn't find SUBST and in the PST phase
2069                                 # In either case, return without further processing
2070                                 $text = $matches[0];
2071                                 $found = true;
2072                                 $noparse = true;
2073                         }
2074                 }
2075
2076                 # MSG, MSGNW and INT
2077                 if ( !$found ) {
2078                         # Check for MSGNW:
2079                         $mwMsgnw =& MagicWord::get( MAG_MSGNW );
2080                         if ( $mwMsgnw->matchStartAndRemove( $part1 ) ) {
2081                                 $nowiki = true;
2082                         }
2083
2084                         # int: is the wikitext equivalent of wfMsg()
2085                         $mwInt =& MagicWord::get( MAG_INT );
2086                         if ( $mwInt->matchStartAndRemove( $part1 ) ) {
2087                                 if ( $this->incrementIncludeCount( 'int:'.$part1 ) ) {
2088                                         $text = $linestart . wfMsgReal( $part1, $args, true );
2089                                         $found = true;
2090                                 }
2091                         }
2092
2093                         # msg: is the wikitext equivalent of wfMsgForContent()
2094                         $mwMsg =& MagicWord::get( MAG_MSG );
2095                         if ( $mwMsg->matchStartAndRemove( $part1 ) ) {
2096                                 if ( $this->incrementIncludeCount( 'msg:'.$part1 ) ) {
2097                                          $text = $linestart . wfMsgReal( $part1, $args, true, true );
2098                                          $found = true;
2099                                 }
2100                         }
2101                 }
2102
2103                 # NS
2104                 if ( !$found ) {
2105                         # Check for NS: (namespace expansion)
2106                         $mwNs = MagicWord::get( MAG_NS );
2107                         if ( $mwNs->matchStartAndRemove( $part1 ) ) {
2108                                 if ( intval( $part1 ) ) {
2109                                         $text = $linestart . $wgContLang->getNsText( intval( $part1 ) );
2110                                         $found = true;
2111                                 } else {
2112                                         $index = Namespace::getCanonicalIndex( strtolower( $part1 ) );
2113                                         if ( !is_null( $index ) ) {
2114                                                 $text = $linestart . $wgContLang->getNsText( $index );
2115                                                 $found = true;
2116                                         }
2117                                 }
2118                         }
2119                 }
2120
2121                 # LOCALURL and LOCALURLE
2122                 if ( !$found ) {
2123                         $mwLocal = MagicWord::get( MAG_LOCALURL );
2124                         $mwLocalE = MagicWord::get( MAG_LOCALURLE );
2125
2126                         if ( $mwLocal->matchStartAndRemove( $part1 ) ) {
2127                                 $func = 'getLocalURL';
2128                         } elseif ( $mwLocalE->matchStartAndRemove( $part1 ) ) {
2129                                 $func = 'escapeLocalURL';
2130                         } else {
2131                                 $func = '';
2132                         }
2133
2134                         if ( $func !== '' ) {
2135                                 $title = Title::newFromText( $part1 );
2136                                 if ( !is_null( $title ) ) {
2137                                         if ( $argc > 0 ) {
2138                                                 $text = $linestart . $title->$func( $args[0] );
2139                                         } else {
2140                                                 $text = $linestart . $title->$func();
2141                                         }
2142                                         $found = true;
2143                                 }
2144                         }
2145                 }
2146
2147                 # GRAMMAR
2148                 if ( !$found && $argc == 1 ) {
2149                         $mwGrammar =& MagicWord::get( MAG_GRAMMAR );
2150                         if ( $mwGrammar->matchStartAndRemove( $part1 ) ) {
2151                                 $text = $linestart . $wgContLang->convertGrammar( $args[0], $part1 );
2152                                 $found = true;
2153                         }
2154                 }
2155
2156                 # Template table test
2157
2158                 # Did we encounter this template already? If yes, it is in the cache
2159                 # and we need to check for loops.
2160                 if ( !$found && isset( $this->mTemplates[$part1] ) ) {
2161                         $found = true;
2162
2163                         # Infinite loop test
2164                         if ( isset( $this->mTemplatePath[$part1] ) ) {
2165                                 $noparse = true;
2166                                 $found = true;
2167                                 $text = $linestart .
2168                                         "\{\{$part1}}" .
2169                                         '<!-- WARNING: template loop detected -->';
2170                                 wfDebug( "$fname: template loop broken at '$part1'\n" );
2171                         } else {
2172                                 # set $text to cached message.
2173                                 $text = $linestart . $this->mTemplates[$part1];
2174                         }
2175                 }
2176
2177                 # Load from database
2178                 $replaceHeadings = false;
2179                 $isHTML = false;
2180                 $lastPathLevel = $this->mTemplatePath;
2181                 if ( !$found ) {
2182                         $ns = NS_TEMPLATE;
2183                         $part1 = $this->maybeDoSubpageLink( $part1, $subpage='' );
2184                         if ($subpage !== '') {
2185                                 $ns = $this->mTitle->getNamespace();
2186                         }
2187                         $title = Title::newFromText( $part1, $ns );
2188                         if ( !is_null( $title ) && !$title->isExternal() ) {
2189                                 # Check for excessive inclusion
2190                                 $dbk = $title->getPrefixedDBkey();
2191                                 if ( $this->incrementIncludeCount( $dbk ) ) {
2192                                         if ( $title->getNamespace() == NS_SPECIAL && $this->mOptions->getAllowSpecialInclusion() ) {
2193                                                 # Capture special page output
2194                                                 $text = SpecialPage::capturePath( $title );
2195                                                 if ( $text && !is_object( $text ) ) {
2196                                                         $found = true;
2197                                                         $noparse = true;
2198                                                         $isHTML = true;
2199                                                         $this->mOutput->setCacheTime( -1 );
2200                                                 }
2201                                         } else {
2202                                                 $article = new Article( $title );
2203                                                 $articleContent = $article->getContentWithoutUsingSoManyDamnGlobals();
2204                                                 if ( $articleContent !== false ) {
2205                                                         $found = true;
2206                                                         $text = $articleContent;
2207                                                         $replaceHeadings = true;
2208                                                 }
2209                                         }
2210                                 }
2211
2212                                 # If the title is valid but undisplayable, make a link to it
2213                                 if ( $this->mOutputType == OT_HTML && !$found ) {
2214                                         $text = '[['.$title->getPrefixedText().']]';
2215                                         $found = true;
2216                                 }
2217
2218                                 # Template cache array insertion
2219                                 if( $found ) {
2220                                         $this->mTemplates[$part1] = $text;
2221                                         $text = $linestart . $text;
2222                                 }
2223                         }
2224                 }
2225
2226                 # Recursive parsing, escaping and link table handling
2227                 # Only for HTML output
2228                 if ( $nowiki && $found && $this->mOutputType == OT_HTML ) {
2229                         $text = wfEscapeWikiText( $text );
2230                 } elseif ( ($this->mOutputType == OT_HTML || $this->mOutputType == OT_WIKI) && $found && !$noparse) {
2231                         # Clean up argument array
2232                         $assocArgs = array();
2233                         $index = 1;
2234                         foreach( $args as $arg ) {
2235                                 $eqpos = strpos( $arg, '=' );
2236                                 if ( $eqpos === false ) {
2237                                         $assocArgs[$index++] = $arg;
2238                                 } else {
2239                                         $name = trim( substr( $arg, 0, $eqpos ) );
2240                                         $value = trim( substr( $arg, $eqpos+1 ) );
2241                                         if ( $value === false ) {
2242                                                 $value = '';
2243                                         }
2244                                         if ( $name !== false ) {
2245                                                 $assocArgs[$name] = $value;
2246                                         }
2247                                 }
2248                         }
2249
2250                         # Add a new element to the templace recursion path
2251                         $this->mTemplatePath[$part1] = 1;
2252
2253                         if( $this->mOutputType == OT_HTML ) {
2254                                 $text = $this->strip( $text, $this->mStripState );
2255                                 $text = Sanitizer::removeHTMLtags( $text );
2256                         }
2257                         $text = $this->replaceVariables( $text, $assocArgs );
2258
2259                         # Resume the link cache and register the inclusion as a link
2260                         if ( $this->mOutputType == OT_HTML && !is_null( $title ) ) {
2261                                 $wgLinkCache->addLinkObj( $title );
2262                         }
2263
2264                         # If the template begins with a table or block-level
2265                         # element, it should be treated as beginning a new line.
2266                         if ($linestart !== '\n' && preg_match('/^({\\||:|;|#|\*)/', $text)) {
2267                                 $text = "\n" . $text;
2268                         }
2269                 }
2270                 # Prune lower levels off the recursion check path
2271                 $this->mTemplatePath = $lastPathLevel;
2272
2273                 if ( !$found ) {
2274                         wfProfileOut( $fname );
2275                         return $matches[0];
2276                 } else {
2277                         if ( $isHTML ) {
2278                                 # Replace raw HTML by a placeholder
2279                                 # Add a blank line preceding, to prevent it from mucking up
2280                                 # immediately preceding headings
2281                                 $text = "\n\n" . $this->insertStripItem( $text, $this->mStripState );
2282                         } else {
2283                                 # replace ==section headers==
2284                                 # XXX this needs to go away once we have a better parser.
2285                                 if ( $this->mOutputType != OT_WIKI && $replaceHeadings ) {
2286                                         if( !is_null( $title ) )
2287                                                 $encodedname = base64_encode($title->getPrefixedDBkey());
2288                                         else
2289                                                 $encodedname = base64_encode("");
2290                                         $m = preg_split('/(^={1,6}.*?={1,6}\s*?$)/m', $text, -1,
2291                                                 PREG_SPLIT_DELIM_CAPTURE);
2292                                         $text = '';
2293                                         $nsec = 0;
2294                                         for( $i = 0; $i < count($m); $i += 2 ) {
2295                                                 $text .= $m[$i];
2296                                                 if (!isset($m[$i + 1]) || $m[$i + 1] == "") continue;
2297                                                 $hl = $m[$i + 1];
2298                                                 if( strstr($hl, "<!--MWTEMPLATESECTION") ) {
2299                                                         $text .= $hl;
2300                                                         continue;
2301                                                 }
2302                                                 preg_match('/^(={1,6})(.*?)(={1,6})\s*?$/m', $hl, $m2);
2303                                                 $text .= $m2[1] . $m2[2] . "<!--MWTEMPLATESECTION="
2304                                                         . $encodedname . "&" . base64_encode("$nsec") . "-->" . $m2[3];
2305
2306                                                 $nsec++;
2307                                         }
2308                                 }
2309                         }
2310                 }
2311
2312                 # Prune lower levels off the recursion check path
2313                 $this->mTemplatePath = $lastPathLevel;
2314
2315                 if ( !$found ) {
2316                         wfProfileOut( $fname );
2317                         return $matches[0];
2318                 } else {
2319                         wfProfileOut( $fname );
2320                         return $text;
2321                 }
2322         }
2323
2324         /**
2325          * Triple brace replacement -- used for template arguments
2326          * @access private
2327          */
2328         function argSubstitution( $matches ) {
2329                 $arg = trim( $matches[1] );
2330                 $text = $matches[0];
2331                 $inputArgs = end( $this->mArgStack );
2332
2333                 if ( array_key_exists( $arg, $inputArgs ) ) {
2334                         $text = $inputArgs[$arg];
2335                 }
2336
2337                 return $text;
2338         }
2339
2340         /**
2341          * Returns true if the function is allowed to include this entity
2342          * @access private
2343          */
2344         function incrementIncludeCount( $dbk ) {
2345                 if ( !array_key_exists( $dbk, $this->mIncludeCount ) ) {
2346                         $this->mIncludeCount[$dbk] = 0;
2347                 }
2348                 if ( ++$this->mIncludeCount[$dbk] <= MAX_INCLUDE_REPEAT ) {
2349                         return true;
2350                 } else {
2351                         return false;
2352                 }
2353         }
2354
2355         /**
2356          * This function accomplishes several tasks:
2357          * 1) Auto-number headings if that option is enabled
2358          * 2) Add an [edit] link to sections for logged in users who have enabled the option
2359          * 3) Add a Table of contents on the top for users who have enabled the option
2360          * 4) Auto-anchor headings
2361          *
2362          * It loops through all headlines, collects the necessary data, then splits up the
2363          * string and re-inserts the newly formatted headlines.
2364          *
2365          * @param string $text
2366          * @param boolean $isMain
2367          * @access private
2368          */
2369         function formatHeadings( $text, $isMain=true ) {
2370                 global $wgMaxTocLevel, $wgContLang, $wgLinkHolders, $wgInterwikiLinkHolders;
2371
2372                 $doNumberHeadings = $this->mOptions->getNumberHeadings();
2373                 $doShowToc = true;
2374                 $forceTocHere = false;
2375                 if( !$this->mTitle->userCanEdit() ) {
2376                         $showEditLink = 0;
2377                 } else {
2378                         $showEditLink = $this->mOptions->getEditSection();
2379                 }
2380
2381                 # Inhibit editsection links if requested in the page
2382                 $esw =& MagicWord::get( MAG_NOEDITSECTION );
2383                 if( $esw->matchAndRemove( $text ) ) {
2384                         $showEditLink = 0;
2385                 }
2386                 # if the string __NOTOC__ (not case-sensitive) occurs in the HTML,
2387                 # do not add TOC
2388                 $mw =& MagicWord::get( MAG_NOTOC );
2389                 if( $mw->matchAndRemove( $text ) ) {
2390                         $doShowToc = false;
2391                 }
2392
2393                 # Get all headlines for numbering them and adding funky stuff like [edit]
2394                 # links - this is for later, but we need the number of headlines right now
2395                 $numMatches = preg_match_all( '/<H([1-6])(.*?'.'>)(.*?)<\/H[1-6] *>/i', $text, $matches );
2396
2397                 # if there are fewer than 4 headlines in the article, do not show TOC
2398                 if( $numMatches < 4 ) {
2399                         $doShowToc = false;
2400                 }
2401
2402                 # if the string __TOC__ (not case-sensitive) occurs in the HTML,
2403                 # override above conditions and always show TOC at that place
2404
2405                 $mw =& MagicWord::get( MAG_TOC );
2406                 if($mw->match( $text ) ) {
2407                         $doShowToc = true;
2408                         $forceTocHere = true;
2409                 } else {
2410                         # if the string __FORCETOC__ (not case-sensitive) occurs in the HTML,
2411                         # override above conditions and always show TOC above first header
2412                         $mw =& MagicWord::get( MAG_FORCETOC );
2413                         if ($mw->matchAndRemove( $text ) ) {
2414                                 $doShowToc = true;
2415                         }
2416                 }
2417
2418                 # Never ever show TOC if no headers
2419                 if( $numMatches < 1 ) {
2420                         $doShowToc = false;
2421                 }
2422
2423                 # We need this to perform operations on the HTML
2424                 $sk =& $this->mOptions->getSkin();
2425
2426                 # headline counter
2427                 $headlineCount = 0;
2428                 $sectionCount = 0; # headlineCount excluding template sections
2429
2430                 # Ugh .. the TOC should have neat indentation levels which can be
2431                 # passed to the skin functions. These are determined here
2432                 $toc = '';
2433                 $full = '';
2434                 $head = array();
2435                 $sublevelCount = array();
2436                 $levelCount = array();
2437                 $toclevel = 0;
2438                 $level = 0;
2439                 $prevlevel = 0;
2440                 $toclevel = 0;
2441                 $prevtoclevel = 0;
2442
2443                 foreach( $matches[3] as $headline ) {
2444                         $istemplate = 0;
2445                         $templatetitle = '';
2446                         $templatesection = 0;
2447                         $numbering = '';
2448
2449                         if (preg_match("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", $headline, $mat)) {
2450                                 $istemplate = 1;
2451                                 $templatetitle = base64_decode($mat[1]);
2452                                 $templatesection = 1 + (int)base64_decode($mat[2]);
2453                                 $headline = preg_replace("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", "", $headline);
2454                         }
2455
2456                         if( $toclevel ) {
2457                                 $prevlevel = $level;
2458                                 $prevtoclevel = $toclevel;
2459                         }
2460                         $level = $matches[1][$headlineCount];
2461
2462                         if( $doNumberHeadings || $doShowToc ) {
2463
2464                                 if ( $level > $prevlevel ) {
2465                                         # Increase TOC level
2466                                         $toclevel++;
2467                                         $sublevelCount[$toclevel] = 0;
2468                                         $toc .= $sk->tocIndent();
2469                                 }
2470                                 elseif ( $level < $prevlevel && $toclevel > 1 ) {
2471                                         # Decrease TOC level, find level to jump to
2472
2473                                         if ( $toclevel == 2 && $level <= $levelCount[1] ) {
2474                                                 # Can only go down to level 1
2475                                                 $toclevel = 1;
2476                                         } else {
2477                                                 for ($i = $toclevel; $i > 0; $i--) {
2478                                                         if ( $levelCount[$i] == $level ) {
2479                                                                 # Found last matching level
2480                                                                 $toclevel = $i;
2481                                                                 break;
2482                                                         }
2483                                                         elseif ( $levelCount[$i] < $level ) {
2484                                                                 # Found first matching level below current level
2485                                                                 $toclevel = $i + 1;
2486                                                                 break;
2487                                                         }
2488                                                 }
2489                                         }
2490
2491                                         $toc .= $sk->tocUnindent( $prevtoclevel - $toclevel );
2492                                 }
2493                                 else {
2494                                         # No change in level, end TOC line
2495                                         $toc .= $sk->tocLineEnd();
2496                                 }
2497
2498                                 $levelCount[$toclevel] = $level;
2499
2500                                 # count number of headlines for each level
2501                                 @$sublevelCount[$toclevel]++;
2502                                 $dot = 0;
2503                                 for( $i = 1; $i <= $toclevel; $i++ ) {
2504                                         if( !empty( $sublevelCount[$i] ) ) {
2505                                                 if( $dot ) {
2506                                                         $numbering .= '.';
2507                                                 }
2508                                                 $numbering .= $wgContLang->formatNum( $sublevelCount[$i] );
2509                                                 $dot = 1;
2510                                         }
2511                                 }
2512                         }
2513
2514                         # The canonized header is a version of the header text safe to use for links
2515                         # Avoid insertion of weird stuff like <math> by expanding the relevant sections
2516                         $canonized_headline = $this->unstrip( $headline, $this->mStripState );
2517                         $canonized_headline = $this->unstripNoWiki( $canonized_headline, $this->mStripState );
2518
2519                         # Remove link placeholders by the link text.
2520                         #     <!--LINK number-->
2521                         # turns into
2522                         #     link text with suffix
2523                         $canonized_headline = preg_replace( '/<!--LINK ([0-9]*)-->/e',
2524                                                             "\$this->mLinkHolders['texts'][\$1]",
2525                                                             $canonized_headline );
2526                         $canonized_headline = preg_replace( '/<!--IWLINK ([0-9]*)-->/e',
2527                                                             "\$this->mInterwikiLinkHolders['texts'][\$1]",
2528                                                             $canonized_headline );
2529
2530                         # strip out HTML
2531                         $canonized_headline = preg_replace( '/<.*?' . '>/','',$canonized_headline );
2532                         $tocline = trim( $canonized_headline );
2533                         $canonized_headline = urlencode( Sanitizer::decodeCharReferences( str_replace(' ', '_', $tocline) ) );
2534                         $replacearray = array(
2535                                 '%3A' => ':',
2536                                 '%' => '.'
2537                         );
2538                         $canonized_headline = str_replace(array_keys($replacearray),array_values($replacearray),$canonized_headline);
2539                         $refers[$headlineCount] = $canonized_headline;
2540
2541                         # count how many in assoc. array so we can track dupes in anchors
2542                         @$refers[$canonized_headline]++;
2543                         $refcount[$headlineCount]=$refers[$canonized_headline];
2544
2545                         # Don't number the heading if it is the only one (looks silly)
2546                         if( $doNumberHeadings && count( $matches[3] ) > 1) {
2547                                 # the two are different if the line contains a link
2548                                 $headline=$numbering . ' ' . $headline;
2549                         }
2550
2551                         # Create the anchor for linking from the TOC to the section
2552                         $anchor = $canonized_headline;
2553                         if($refcount[$headlineCount] > 1 ) {
2554                                 $anchor .= '_' . $refcount[$headlineCount];
2555                         }
2556                         if( $doShowToc && ( !isset($wgMaxTocLevel) || $toclevel<$wgMaxTocLevel ) ) {
2557                                 $toc .= $sk->tocLine($anchor, $tocline, $numbering, $toclevel);
2558                         }
2559                         if( $showEditLink && ( !$istemplate || $templatetitle !== "" ) ) {
2560                                 if ( empty( $head[$headlineCount] ) ) {
2561                                         $head[$headlineCount] = '';
2562                                 }
2563                                 if( $istemplate )
2564                                         $head[$headlineCount] .= $sk->editSectionLinkForOther($templatetitle, $templatesection);
2565                                 else
2566                                         $head[$headlineCount] .= $sk->editSectionLink($this->mTitle, $sectionCount+1);
2567                         }
2568
2569                         # give headline the correct <h#> tag
2570                         @$head[$headlineCount] .= "<a name=\"$anchor\"></a><h".$level.$matches[2][$headlineCount] .$headline.'</h'.$level.'>';
2571
2572                         $headlineCount++;
2573                         if( !$istemplate )
2574                                 $sectionCount++;
2575                 }
2576
2577                 if( $doShowToc ) {
2578                         $toc .= $sk->tocUnindent( $toclevel - 1 );
2579                         $toc = $sk->tocList( $toc );
2580                 }
2581
2582                 # split up and insert constructed headlines
2583
2584                 $blocks = preg_split( '/<H[1-6].*?' . '>.*?<\/H[1-6]>/i', $text );
2585                 $i = 0;
2586
2587                 foreach( $blocks as $block ) {
2588                         if( $showEditLink && $headlineCount > 0 && $i == 0 && $block != "\n" ) {
2589                                 # This is the [edit] link that appears for the top block of text when
2590                                 # section editing is enabled
2591
2592                                 # Disabled because it broke block formatting
2593                                 # For example, a bullet point in the top line
2594                                 # $full .= $sk->editSectionLink(0);
2595                         }
2596                         $full .= $block;
2597                         if( $doShowToc && !$i && $isMain && !$forceTocHere) {
2598                         # Top anchor now in skin
2599                                 $full = $full.$toc;
2600                         }
2601
2602                         if( !empty( $head[$i] ) ) {
2603                                 $full .= $head[$i];
2604                         }
2605                         $i++;
2606                 }
2607                 if($forceTocHere) {
2608                         $mw =& MagicWord::get( MAG_TOC );
2609                         return $mw->replace( $toc, $full );
2610                 } else {
2611                         return $full;
2612                 }
2613         }
2614
2615         /**
2616          * Return an HTML link for the "ISBN 123456" text
2617          * @access private
2618          */
2619         function magicISBN( $text ) {
2620                 $fname = 'Parser::magicISBN';
2621                 wfProfileIn( $fname );
2622
2623                 $a = split( 'ISBN ', ' '.$text );
2624                 if ( count ( $a ) < 2 ) {
2625                         wfProfileOut( $fname );
2626                         return $text;
2627                 }
2628                 $text = substr( array_shift( $a ), 1);
2629                 $valid = '0123456789-Xx';
2630
2631                 foreach ( $a as $x ) {
2632                         $isbn = $blank = '' ;
2633                         while ( ' ' == $x{0} ) {
2634                                 $blank .= ' ';
2635                                 $x = substr( $x, 1 );
2636                         }
2637                         if ( $x == '' ) { # blank isbn
2638                                 $text .= "ISBN $blank";
2639                                 continue;
2640                         }
2641                         while ( strstr( $valid, $x{0} ) != false ) {
2642                                 $isbn .= $x{0};
2643                                 $x = substr( $x, 1 );
2644                         }
2645                         $num = str_replace( '-', '', $isbn );
2646                         $num = str_replace( ' ', '', $num );
2647                         $num = str_replace( 'x', 'X', $num );
2648
2649                         if ( '' == $num ) {
2650                                 $text .= "ISBN $blank$x";
2651                         } else {
2652                                 $titleObj = Title::makeTitle( NS_SPECIAL, 'Booksources' );
2653                                 $text .= '<a href="' .
2654                                 $titleObj->escapeLocalUrl( 'isbn='.$num ) .
2655                                         "\" class=\"internal\">ISBN $isbn</a>";
2656                                 $text .= $x;
2657                         }
2658                 }
2659                 wfProfileOut( $fname );
2660                 return $text;
2661         }
2662
2663         /**
2664          * Return an HTML link for the "RFC 1234" text
2665          *
2666          * @access private
2667          * @param string $text     Text to be processed
2668          * @param string $keyword  Magic keyword to use (default RFC)
2669          * @param string $urlmsg   Interface message to use (default rfcurl)
2670          * @return string
2671          */
2672         function magicRFC( $text, $keyword='RFC ', $urlmsg='rfcurl'  ) {
2673
2674                 $valid = '0123456789';
2675                 $internal = false;
2676
2677                 $a = split( $keyword, ' '.$text );
2678                 if ( count ( $a ) < 2 ) {
2679                         return $text;
2680                 }
2681                 $text = substr( array_shift( $a ), 1);
2682
2683                 /* Check if keyword is preceed by [[.
2684                  * This test is made here cause of the array_shift above
2685                  * that prevent the test to be done in the foreach.
2686                  */
2687                 if ( substr( $text, -2 ) == '[[' ) {
2688                         $internal = true;
2689                 }
2690
2691                 foreach ( $a as $x ) {
2692                         /* token might be empty if we have RFC RFC 1234 */
2693                         if ( $x=='' ) {
2694                                 $text.=$keyword;
2695                                 continue;
2696                                 }
2697
2698                         $id = $blank = '' ;
2699
2700                         /** remove and save whitespaces in $blank */
2701                         while ( $x{0} == ' ' ) {
2702                                 $blank .= ' ';
2703                                 $x = substr( $x, 1 );
2704                         }
2705
2706                         /** remove and save the rfc number in $id */
2707                         while ( strstr( $valid, $x{0} ) != false ) {
2708                                 $id .= $x{0};
2709                                 $x = substr( $x, 1 );
2710                         }
2711
2712                         if ( $id == '' ) {
2713                                 /* call back stripped spaces*/
2714                                 $text .= $keyword.$blank.$x;
2715                         } elseif( $internal ) {
2716                                 /* normal link */
2717                                 $text .= $keyword.$id.$x;
2718                         } else {
2719                                 /* build the external link*/
2720                                 $url = wfMsg( $urlmsg, $id);
2721                                 $sk =& $this->mOptions->getSkin();
2722                                 $la = $sk->getExternalLinkAttributes( $url, $keyword.$id );
2723                                 $text .= "<a href='{$url}'{$la}>{$keyword}{$id}</a>{$x}";
2724                         }
2725
2726                         /* Check if the next RFC keyword is preceed by [[ */
2727                         $internal = ( substr($x,-2) == '[[' );
2728                 }
2729                 return $text;
2730         }
2731
2732         /**
2733          * Transform wiki markup when saving a page by doing \r\n -> \n
2734          * conversion, substitting signatures, {{subst:}} templates, etc.
2735          *
2736          * @param string $text the text to transform
2737          * @param Title &$title the Title object for the current article
2738          * @param User &$user the User object describing the current user
2739          * @param ParserOptions $options parsing options
2740          * @param bool $clearState whether to clear the parser state first
2741          * @return string the altered wiki markup
2742          * @access public
2743          */
2744         function preSaveTransform( $text, &$title, &$user, $options, $clearState = true ) {
2745                 $this->mOptions = $options;
2746                 $this->mTitle =& $title;
2747                 $this->mOutputType = OT_WIKI;
2748
2749                 if ( $clearState ) {
2750                         $this->clearState();
2751                 }
2752
2753                 $stripState = false;
2754                 $pairs = array(
2755                         "\r\n" => "\n",
2756                 );
2757                 $text = str_replace( array_keys( $pairs ), array_values( $pairs ), $text );
2758                 $text = $this->strip( $text, $stripState, false );
2759                 $text = $this->pstPass2( $text, $user );
2760                 $text = $this->unstrip( $text, $stripState );
2761                 $text = $this->unstripNoWiki( $text, $stripState );
2762                 return $text;
2763         }
2764
2765         /**
2766          * Pre-save transform helper function
2767          * @access private
2768          */
2769         function pstPass2( $text, &$user ) {
2770                 global $wgContLang, $wgLocaltimezone;
2771
2772                 # Variable replacement
2773                 # Because mOutputType is OT_WIKI, this will only process {{subst:xxx}} type tags
2774                 $text = $this->replaceVariables( $text );
2775
2776                 # Signatures
2777                 #
2778                 $n = $user->getName();
2779                 $k = $user->getOption( 'nickname' );
2780                 if ( '' == $k ) { $k = $n; }
2781                 if ( isset( $wgLocaltimezone ) ) {
2782                         $oldtz = getenv( 'TZ' );
2783                         putenv( 'TZ='.$wgLocaltimezone );
2784                 }
2785
2786                 /* Note: This is the timestamp saved as hardcoded wikitext to
2787                  * the database, we use $wgContLang here in order to give
2788                  * everyone the same signiture and use the default one rather
2789                  * than the one selected in each users preferences.
2790                  */
2791                 $d = $wgContLang->timeanddate( wfTimestampNow(), false, false) .
2792                   ' (' . date( 'T' ) . ')';
2793                 if ( isset( $wgLocaltimezone ) ) {
2794                         putenv( 'TZ='.$oldtz );
2795                 }
2796
2797                 if( $user->getOption( 'fancysig' ) ) {
2798                         $sigText = $k;
2799                 } else {
2800                         $sigText = '[[' . $wgContLang->getNsText( NS_USER ) . ":$n|$k]]";
2801                 }
2802                 $text = preg_replace( '/~~~~~/', $d, $text );
2803                 $text = preg_replace( '/~~~~/', "$sigText $d", $text );
2804                 $text = preg_replace( '/~~~/', $sigText, $text );
2805
2806                 # Context links: [[|name]] and [[name (context)|]]
2807                 #
2808                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
2809                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
2810                 $namespacechar = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
2811                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
2812
2813                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
2814                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
2815                 $p3 = "/\[\[(:*$namespacechar+):({$np}+)\\|]]/";                # [[namespace:page|]] and [[:namespace:page|]]
2816                 $p4 = "/\[\[(:*$namespacechar+):({$np}+) \\(({$np}+)\\)\\|]]/"; # [[ns:page (cont)|]] and [[:ns:page (cont)|]]
2817                 $context = '';
2818                 $t = $this->mTitle->getText();
2819                 if ( preg_match( $conpat, $t, $m ) ) {
2820                         $context = $m[2];
2821                 }
2822                 $text = preg_replace( $p4, '[[\\1:\\2 (\\3)|\\2]]', $text );
2823                 $text = preg_replace( $p1, '[[\\1 (\\2)|\\1]]', $text );
2824                 $text = preg_replace( $p3, '[[\\1:\\2|\\2]]', $text );
2825
2826                 if ( '' == $context ) {
2827                         $text = preg_replace( $p2, '[[\\1]]', $text );
2828                 } else {
2829                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
2830                 }
2831
2832                 # Trim trailing whitespace
2833                 # MAG_END (__END__) tag allows for trailing
2834                 # whitespace to be deliberately included
2835                 $text = rtrim( $text );
2836                 $mw =& MagicWord::get( MAG_END );
2837                 $mw->matchAndRemove( $text );
2838
2839                 return $text;
2840         }
2841
2842         /**
2843          * Set up some variables which are usually set up in parse()
2844          * so that an external function can call some class members with confidence
2845          * @access public
2846          */
2847         function startExternalParse( &$title, $options, $outputType, $clearState = true ) {
2848                 $this->mTitle =& $title;
2849                 $this->mOptions = $options;
2850                 $this->mOutputType = $outputType;
2851                 if ( $clearState ) {
2852                         $this->clearState();
2853                 }
2854         }
2855
2856         /**
2857          * Transform a MediaWiki message by replacing magic variables.
2858          *
2859          * @param string $text the text to transform
2860          * @param ParserOptions $options  options
2861          * @return string the text with variables substituted
2862          * @access public
2863          */
2864         function transformMsg( $text, $options ) {
2865                 global $wgTitle;
2866                 static $executing = false;
2867
2868                 # Guard against infinite recursion
2869                 if ( $executing ) {
2870                         return $text;
2871                 }
2872                 $executing = true;
2873
2874                 $this->mTitle = $wgTitle;
2875                 $this->mOptions = $options;
2876                 $this->mOutputType = OT_MSG;
2877                 $this->clearState();
2878                 $text = $this->replaceVariables( $text );
2879
2880                 $executing = false;
2881                 return $text;
2882         }
2883
2884         /**
2885          * Create an HTML-style tag, e.g. <yourtag>special text</yourtag>
2886          * Callback will be called with the text within
2887          * Transform and return the text within
2888          * @access public
2889          */
2890         function setHook( $tag, $callback ) {
2891                 $oldVal = @$this->mTagHooks[$tag];
2892                 $this->mTagHooks[$tag] = $callback;
2893                 return $oldVal;
2894         }
2895
2896         /**
2897          * Replace <!--LINK--> link placeholders with actual links, in the buffer
2898          * Placeholders created in Skin::makeLinkObj()
2899          * Returns an array of links found, indexed by PDBK:
2900          *  0 - broken
2901          *  1 - normal link
2902          *  2 - stub
2903          * $options is a bit field, RLH_FOR_UPDATE to select for update
2904          */
2905         function replaceLinkHolders( &$text, $options = 0 ) {
2906                 global $wgUser, $wgLinkCache;
2907                 global $wgOutputReplace;
2908
2909                 $fname = 'Parser::replaceLinkHolders';
2910                 wfProfileIn( $fname );
2911
2912                 $pdbks = array();
2913                 $colours = array();
2914                 $sk = $this->mOptions->getSkin();
2915
2916                 if ( !empty( $this->mLinkHolders['namespaces'] ) ) {
2917                         wfProfileIn( $fname.'-check' );
2918                         $dbr =& wfGetDB( DB_SLAVE );
2919                         $page = $dbr->tableName( 'page' );
2920                         $threshold = $wgUser->getOption('stubthreshold');
2921
2922                         # Sort by namespace
2923                         asort( $this->mLinkHolders['namespaces'] );
2924
2925                         # Generate query
2926                         $query = false;
2927                         foreach ( $this->mLinkHolders['namespaces'] as $key => $val ) {
2928                                 # Make title object
2929                                 $title = $this->mLinkHolders['titles'][$key];
2930
2931                                 # Skip invalid entries.
2932                                 # Result will be ugly, but prevents crash.
2933                                 if ( is_null( $title ) ) {
2934                                         continue;
2935                                 }
2936                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
2937
2938                                 # Check if it's in the link cache already
2939                                 if ( $wgLinkCache->getGoodLinkID( $pdbk ) ) {
2940                                         $colours[$pdbk] = 1;
2941                                 } elseif ( $wgLinkCache->isBadLink( $pdbk ) ) {
2942                                         $colours[$pdbk] = 0;
2943                                 } else {
2944                                         # Not in the link cache, add it to the query
2945                                         if ( !isset( $current ) ) {
2946                                                 $current = $val;
2947                                                 $query =  "SELECT page_id, page_namespace, page_title";
2948                                                 if ( $threshold > 0 ) {
2949                                                         $query .= ', page_len, page_is_redirect';
2950                                                 }
2951                                                 $query .= " FROM $page WHERE (page_namespace=$val AND page_title IN(";
2952                                         } elseif ( $current != $val ) {
2953                                                 $current = $val;
2954                                                 $query .= ")) OR (page_namespace=$val AND page_title IN(";
2955                                         } else {
2956                                                 $query .= ', ';
2957                                         }
2958
2959                                         $query .= $dbr->addQuotes( $this->mLinkHolders['dbkeys'][$key] );
2960                                 }
2961                         }
2962                         if ( $query ) {
2963                                 $query .= '))';
2964                                 if ( $options & RLH_FOR_UPDATE ) {
2965                                         $query .= ' FOR UPDATE';
2966                                 }
2967
2968                                 $res = $dbr->query( $query, $fname );
2969
2970                                 # Fetch data and form into an associative array
2971                                 # non-existent = broken
2972                                 # 1 = known
2973                                 # 2 = stub
2974                                 while ( $s = $dbr->fetchObject($res) ) {
2975                                         $title = Title::makeTitle( $s->page_namespace, $s->page_title );
2976                                         $pdbk = $title->getPrefixedDBkey();
2977                                         $wgLinkCache->addGoodLinkObj( $s->page_id, $title );
2978
2979                                         if ( $threshold >  0 ) {
2980                                                 $size = $s->page_len;
2981                                                 if ( $s->page_is_redirect || $s->page_namespace != 0 || $size >= $threshold ) {
2982                                                         $colours[$pdbk] = 1;
2983                                                 } else {
2984                                                         $colours[$pdbk] = 2;
2985                                                 }
2986                                         } else {
2987                                                 $colours[$pdbk] = 1;
2988                                         }
2989                                 }
2990                         }
2991                         wfProfileOut( $fname.'-check' );
2992
2993                         # Construct search and replace arrays
2994                         wfProfileIn( $fname.'-construct' );
2995                         $wgOutputReplace = array();
2996                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
2997                                 $pdbk = $pdbks[$key];
2998                                 $searchkey = "<!--LINK $key-->";
2999                                 $title = $this->mLinkHolders['titles'][$key];
3000                                 if ( empty( $colours[$pdbk] ) ) {
3001                                         $wgLinkCache->addBadLinkObj( $title );
3002                                         $colours[$pdbk] = 0;
3003                                         $wgOutputReplace[$searchkey] = $sk->makeBrokenLinkObj( $title,
3004                                                                         $this->mLinkHolders['texts'][$key],
3005                                                                         $this->mLinkHolders['queries'][$key] );
3006                                 } elseif ( $colours[$pdbk] == 1 ) {
3007                                         $wgOutputReplace[$searchkey] = $sk->makeKnownLinkObj( $title,
3008                                                                         $this->mLinkHolders['texts'][$key],
3009                                                                         $this->mLinkHolders['queries'][$key] );
3010                                 } elseif ( $colours[$pdbk] == 2 ) {
3011                                         $wgOutputReplace[$searchkey] = $sk->makeStubLinkObj( $title,
3012                                                                         $this->mLinkHolders['texts'][$key],
3013                                                                         $this->mLinkHolders['queries'][$key] );
3014                                 }
3015                         }
3016                         wfProfileOut( $fname.'-construct' );
3017
3018                         # Do the thing
3019                         wfProfileIn( $fname.'-replace' );
3020
3021                         $text = preg_replace_callback(
3022                                 '/(<!--LINK .*?-->)/',
3023                                 "wfOutputReplaceMatches",
3024                                 $text);
3025
3026                         wfProfileOut( $fname.'-replace' );
3027                 }
3028
3029                 # Now process interwiki link holders
3030                 # This is quite a bit simpler than internal links
3031                 if ( !empty( $this->mInterwikiLinkHolders['texts'] ) ) {
3032                         wfProfileIn( $fname.'-interwiki' );
3033                         # Make interwiki link HTML
3034                         $wgOutputReplace = array();
3035                         foreach( $this->mInterwikiLinkHolders['texts'] as $key => $link ) {
3036                                 $title = $this->mInterwikiLinkHolders['titles'][$key];
3037                                 $wgOutputReplace[$key] = $sk->makeLinkObj( $title, $link );
3038                         }
3039
3040                         $text = preg_replace_callback(
3041                                 '/<!--IWLINK (.*?)-->/',
3042                                 "wfOutputReplaceMatches",
3043                                 $text );
3044                         wfProfileOut( $fname.'-interwiki' );
3045                 }
3046
3047                 wfProfileOut( $fname );
3048                 return $colours;
3049         }
3050
3051         /**
3052          * Replace <!--LINK--> link placeholders with plain text of links
3053          * (not HTML-formatted).
3054          * @param string $text
3055          * @return string
3056          */
3057         function replaceLinkHoldersText( $text ) {
3058                 global $wgUser, $wgLinkCache;
3059                 global $wgOutputReplace;
3060
3061                 $fname = 'Parser::replaceLinkHoldersText';
3062                 wfProfileIn( $fname );
3063
3064                 $text = preg_replace_callback(
3065                         '/<!--(LINK|IWLINK) (.*?)-->/',
3066                         array( &$this, 'replaceLinkHoldersTextCallback' ),
3067                         $text );
3068
3069                 wfProfileOut( $fname );
3070                 return $text;
3071         }
3072
3073         /**
3074          * @param array $matches
3075          * @return string
3076          * @access private
3077          */
3078         function replaceLinkHoldersTextCallback( $matches ) {
3079                 $type = $matches[1];
3080                 $key  = $matches[2];
3081                 if( $type == 'LINK' ) {
3082                         if( isset( $this->mLinkHolders['texts'][$key] ) ) {
3083                                 return $this->mLinkHolders['texts'][$key];
3084                         }
3085                 } elseif( $type == 'IWLINK' ) {
3086                         if( isset( $this->mInterwikiLinkHolders['texts'][$key] ) ) {
3087                                 return $this->mInterwikiLinkHolders['texts'][$key];
3088                         }
3089                 }
3090                 return $matches[0];
3091         }
3092
3093         /**
3094          * Renders an image gallery from a text with one line per image.
3095          * text labels may be given by using |-style alternative text. E.g.
3096          *   Image:one.jpg|The number "1"
3097          *   Image:tree.jpg|A tree
3098          * given as text will return the HTML of a gallery with two images,
3099          * labeled 'The number "1"' and
3100          * 'A tree'.
3101          *
3102          * @static
3103          */
3104         function renderImageGallery( $text ) {
3105                 # Setup the parser
3106                 global $wgUser, $wgParser, $wgTitle;
3107                 $parserOptions = ParserOptions::newFromUser( $wgUser );
3108
3109                 global $wgLinkCache;
3110                 $ig = new ImageGallery();
3111                 $ig->setShowBytes( false );
3112                 $ig->setShowFilename( false );
3113                 $lines = explode( "\n", $text );
3114
3115                 foreach ( $lines as $line ) {
3116                         # match lines like these:
3117                         # Image:someimage.jpg|This is some image
3118                         preg_match( "/^([^|]+)(\\|(.*))?$/", $line, $matches );
3119                         # Skip empty lines
3120                         if ( count( $matches ) == 0 ) {
3121                                 continue;
3122                         }
3123                         $nt = Title::newFromURL( $matches[1] );
3124                         if( is_null( $nt ) ) {
3125                                 # Bogus title. Ignore these so we don't bomb out later.
3126                                 continue;
3127                         }
3128                         if ( isset( $matches[3] ) ) {
3129                                 $label = $matches[3];
3130                         } else {
3131                                 $label = '';
3132                         }
3133
3134                         $html = $wgParser->parse( $label , $wgTitle, $parserOptions );
3135                         $html = $html->mText;
3136
3137                         $ig->add( new Image( $nt ), $html );
3138                         $wgLinkCache->addImageLinkObj( $nt );
3139                 }
3140                 return $ig->toHTML();
3141         }
3142
3143         /**
3144          * Parse image options text and use it to make an image
3145          */
3146         function makeImage( &$nt, $options ) {
3147                 global $wgContLang, $wgUseImageResize;
3148                 global $wgUser, $wgThumbLimits;
3149
3150                 $align = '';
3151
3152                 # Check if the options text is of the form "options|alt text"
3153                 # Options are:
3154                 #  * thumbnail          make a thumbnail with enlarge-icon and caption, alignment depends on lang
3155                 #  * left               no resizing, just left align. label is used for alt= only
3156                 #  * right              same, but right aligned
3157                 #  * none               same, but not aligned
3158                 #  * ___px              scale to ___ pixels width, no aligning. e.g. use in taxobox
3159                 #  * center             center the image
3160                 #  * framed             Keep original image size, no magnify-button.
3161
3162                 $part = explode( '|', $options);
3163
3164                 $mwThumb  =& MagicWord::get( MAG_IMG_THUMBNAIL );
3165                 $mwLeft   =& MagicWord::get( MAG_IMG_LEFT );
3166                 $mwRight  =& MagicWord::get( MAG_IMG_RIGHT );
3167                 $mwNone   =& MagicWord::get( MAG_IMG_NONE );
3168                 $mwWidth  =& MagicWord::get( MAG_IMG_WIDTH );
3169                 $mwCenter =& MagicWord::get( MAG_IMG_CENTER );
3170                 $mwFramed =& MagicWord::get( MAG_IMG_FRAMED );
3171                 $caption = '';
3172
3173                 $width = $height = $framed = $thumb = false;
3174                 $manual_thumb = "" ;
3175
3176                 foreach( $part as $key => $val ) {
3177                         $val_parts = explode ( "=" , $val , 2 ) ;
3178                         $left_part = array_shift ( $val_parts ) ;
3179                         if ( $wgUseImageResize && ! is_null( $mwThumb->matchVariableStartToEnd($val) ) ) {
3180                                 $thumb=true;
3181                         } elseif ( $wgUseImageResize && count ( $val_parts ) == 1 && ! is_null( $mwThumb->matchVariableStartToEnd($left_part) ) ) {
3182                                 # use manually specified thumbnail
3183                                 $thumb=true;
3184                                 $manual_thumb = array_shift ( $val_parts ) ;
3185                         } elseif ( ! is_null( $mwRight->matchVariableStartToEnd($val) ) ) {
3186                                 # remember to set an alignment, don't render immediately
3187                                 $align = 'right';
3188                         } elseif ( ! is_null( $mwLeft->matchVariableStartToEnd($val) ) ) {
3189                                 # remember to set an alignment, don't render immediately
3190                                 $align = 'left';
3191                         } elseif ( ! is_null( $mwCenter->matchVariableStartToEnd($val) ) ) {
3192                                 # remember to set an alignment, don't render immediately
3193                                 $align = 'center';
3194                         } elseif ( ! is_null( $mwNone->matchVariableStartToEnd($val) ) ) {
3195                                 # remember to set an alignment, don't render immediately
3196                                 $align = 'none';
3197                         } elseif ( $wgUseImageResize && ! is_null( $match = $mwWidth->matchVariableStartToEnd($val) ) ) {
3198                                 wfDebug( "MAG_IMG_WIDTH match: $match\n" );
3199                                 # $match is the image width in pixels
3200                                 if ( preg_match( '/^([0-9]*)x([0-9]*)$/', $match, $m ) ) {
3201                                         $width = intval( $m[1] );
3202                                         $height = intval( $m[2] );
3203                                 } else {
3204                                         $width = intval($match);
3205                                 }
3206                         } elseif ( ! is_null( $mwFramed->matchVariableStartToEnd($val) ) ) {
3207                                 $framed=true;
3208                         } else {
3209                                 $caption = $val;
3210                         }
3211                 }
3212                 # Strip bad stuff out of the alt text
3213                 $alt = $this->replaceLinkHoldersText( $caption );
3214                 $alt = Sanitizer::stripAllTags( $alt );
3215
3216                 # Linker does the rest
3217                 $sk =& $this->mOptions->getSkin();
3218                 return $sk->makeImageLinkObj( $nt, $caption, $alt, $align, $width, $height, $framed, $thumb, $manual_thumb );
3219         }
3220 }
3221
3222 /**
3223  * @todo document
3224  * @package MediaWiki
3225  */
3226 class ParserOutput
3227 {
3228         var $mText, $mLanguageLinks, $mCategoryLinks, $mContainsOldMagic;
3229         var $mCacheTime; # Timestamp on this article, or -1 for uncacheable. Used in ParserCache.
3230         var $mVersion;   # Compatibility check
3231         var $mTitleText; # title text of the chosen language variant
3232
3233         function ParserOutput( $text = '', $languageLinks = array(), $categoryLinks = array(),
3234                 $containsOldMagic = false, $titletext = '' )
3235         {
3236                 $this->mText = $text;
3237                 $this->mLanguageLinks = $languageLinks;
3238                 $this->mCategoryLinks = $categoryLinks;
3239                 $this->mContainsOldMagic = $containsOldMagic;
3240                 $this->mCacheTime = '';
3241                 $this->mVersion = MW_PARSER_VERSION;
3242                 $this->mTitleText = $titletext;
3243         }
3244
3245         function getText()                   { return $this->mText; }
3246         function getLanguageLinks()          { return $this->mLanguageLinks; }
3247         function getCategoryLinks()          { return array_keys( $this->mCategoryLinks ); }
3248         function getCacheTime()              { return $this->mCacheTime; }
3249         function getTitleText()              { return $this->mTitleText; }
3250         function containsOldMagic()          { return $this->mContainsOldMagic; }
3251         function setText( $text )            { return wfSetVar( $this->mText, $text ); }
3252         function setLanguageLinks( $ll )     { return wfSetVar( $this->mLanguageLinks, $ll ); }
3253         function setCategoryLinks( $cl )     { return wfSetVar( $this->mCategoryLinks, $cl ); }
3254         function setContainsOldMagic( $com ) { return wfSetVar( $this->mContainsOldMagic, $com ); }
3255         function setCacheTime( $t )          { return wfSetVar( $this->mCacheTime, $t ); }
3256         function setTitleText( $t )          { return wfSetVar ($this->mTitleText, $t); }
3257
3258         function addCategoryLink( $c )       { $this->mCategoryLinks[$c] = 1; }
3259
3260         function merge( $other ) {
3261                 $this->mLanguageLinks = array_merge( $this->mLanguageLinks, $other->mLanguageLinks );
3262                 $this->mCategoryLinks = array_merge( $this->mCategoryLinks, $this->mLanguageLinks );
3263                 $this->mContainsOldMagic = $this->mContainsOldMagic || $other->mContainsOldMagic;
3264         }
3265
3266         /**
3267          * Return true if this cached output object predates the global or
3268          * per-article cache invalidation timestamps, or if it comes from
3269          * an incompatible older version.
3270          *
3271          * @param string $touched the affected article's last touched timestamp
3272          * @return bool
3273          * @access public
3274          */
3275         function expired( $touched ) {
3276                 global $wgCacheEpoch;
3277                 return $this->getCacheTime() == -1 || // parser says it's uncacheable
3278                        $this->getCacheTime() <= $touched ||
3279                        $this->getCacheTime() <= $wgCacheEpoch ||
3280                        !isset( $this->mVersion ) ||
3281                        version_compare( $this->mVersion, MW_PARSER_VERSION, "lt" );
3282         }
3283 }
3284
3285 /**
3286  * Set options of the Parser
3287  * @todo document
3288  * @package MediaWiki
3289  */
3290 class ParserOptions
3291 {
3292         # All variables are private
3293         var $mUseTeX;                    # Use texvc to expand <math> tags
3294         var $mUseDynamicDates;           # Use DateFormatter to format dates
3295         var $mInterwikiMagic;            # Interlanguage links are removed and returned in an array
3296         var $mAllowExternalImages;       # Allow external images inline
3297         var $mSkin;                      # Reference to the preferred skin
3298         var $mDateFormat;                # Date format index
3299         var $mEditSection;               # Create "edit section" links
3300         var $mNumberHeadings;            # Automatically number headings
3301         var $mAllowSpecialInclusion;     # Allow inclusion of special pages
3302
3303         function getUseTeX()                        { return $this->mUseTeX; }
3304         function getUseDynamicDates()               { return $this->mUseDynamicDates; }
3305         function getInterwikiMagic()                { return $this->mInterwikiMagic; }
3306         function getAllowExternalImages()           { return $this->mAllowExternalImages; }
3307         function getSkin()                          { return $this->mSkin; }
3308         function getDateFormat()                    { return $this->mDateFormat; }
3309         function getEditSection()                   { return $this->mEditSection; }
3310         function getNumberHeadings()                { return $this->mNumberHeadings; }
3311         function getAllowSpecialInclusion()         { return $this->mAllowSpecialInclusion; }
3312
3313
3314         function setUseTeX( $x )                    { return wfSetVar( $this->mUseTeX, $x ); }
3315         function setUseDynamicDates( $x )           { return wfSetVar( $this->mUseDynamicDates, $x ); }
3316         function setInterwikiMagic( $x )            { return wfSetVar( $this->mInterwikiMagic, $x ); }
3317         function setAllowExternalImages( $x )       { return wfSetVar( $this->mAllowExternalImages, $x ); }
3318         function setDateFormat( $x )                { return wfSetVar( $this->mDateFormat, $x ); }
3319         function setEditSection( $x )               { return wfSetVar( $this->mEditSection, $x ); }
3320         function setNumberHeadings( $x )            { return wfSetVar( $this->mNumberHeadings, $x ); }
3321         function setAllowSpecialInclusion( $x )     { return wfSetVar( $this->mAllowSpecialInclusion, $x ); }
3322
3323         function setSkin( &$x ) { $this->mSkin =& $x; }
3324
3325         function ParserOptions() {
3326                 global $wgUser;
3327                 $this->initialiseFromUser( $wgUser );
3328         }
3329
3330         /**
3331          * Get parser options
3332          * @static
3333          */
3334         function newFromUser( &$user ) {
3335                 $popts = new ParserOptions;
3336                 $popts->initialiseFromUser( $user );
3337                 return $popts;
3338         }
3339
3340         /** Get user options */
3341         function initialiseFromUser( &$userInput ) {
3342                 global $wgUseTeX, $wgUseDynamicDates, $wgInterwikiMagic, $wgAllowExternalImages,
3343                        $wgAllowSpecialInclusion;
3344                 $fname = 'ParserOptions::initialiseFromUser';
3345                 wfProfileIn( $fname );
3346                 if ( !$userInput ) {
3347                         $user = new User;
3348                         $user->setLoaded( true );
3349                 } else {
3350                         $user =& $userInput;
3351                 }
3352
3353                 $this->mUseTeX = $wgUseTeX;
3354                 $this->mUseDynamicDates = $wgUseDynamicDates;
3355                 $this->mInterwikiMagic = $wgInterwikiMagic;
3356                 $this->mAllowExternalImages = $wgAllowExternalImages;
3357                 wfProfileIn( $fname.'-skin' );
3358                 $this->mSkin =& $user->getSkin();
3359                 wfProfileOut( $fname.'-skin' );
3360                 $this->mDateFormat = $user->getOption( 'date' );
3361                 $this->mEditSection = $user->getOption( 'editsection' );
3362                 $this->mNumberHeadings = $user->getOption( 'numberheadings' );
3363                 $this->mAllowSpecialInclusion = $wgAllowSpecialInclusion;
3364                 wfProfileOut( $fname );
3365         }
3366 }
3367
3368 /**
3369  * Callback function used by Parser::replaceLinkHolders()
3370  * to substitute link placeholders.
3371  */
3372 function &wfOutputReplaceMatches( $matches ) {
3373         global $wgOutputReplace;
3374         return $wgOutputReplace[$matches[1]];
3375 }
3376
3377 /**
3378  * Return the total number of articles
3379  */
3380 function wfNumberOfArticles() {
3381         global $wgNumberOfArticles;
3382
3383         wfLoadSiteStats();
3384         return $wgNumberOfArticles;
3385 }
3386
3387 /**
3388  * Get various statistics from the database
3389  * @private
3390  */
3391 function wfLoadSiteStats() {
3392         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
3393         $fname = 'wfLoadSiteStats';
3394
3395         if ( -1 != $wgNumberOfArticles ) return;
3396         $dbr =& wfGetDB( DB_SLAVE );
3397         $s = $dbr->selectRow( 'site_stats',
3398                 array( 'ss_total_views', 'ss_total_edits', 'ss_good_articles' ),
3399                 array( 'ss_row_id' => 1 ), $fname
3400         );
3401
3402         if ( $s === false ) {
3403                 return;
3404         } else {
3405                 $wgTotalViews = $s->ss_total_views;
3406                 $wgTotalEdits = $s->ss_total_edits;
3407                 $wgNumberOfArticles = $s->ss_good_articles;
3408         }
3409 }
3410
3411 /**
3412  * Escape html tags
3413  * Basicly replacing " > and < with HTML entities ( &quot;, &gt;, &lt;)
3414  *
3415  * @param string $in Text that might contain HTML tags
3416  * @return string Escaped string
3417  */
3418 function wfEscapeHTMLTagsOnly( $in ) {
3419         return str_replace(
3420                 array( '"', '>', '<' ),
3421                 array( '&quot;', '&gt;', '&lt;' ),
3422                 $in );
3423 }
3424
3425 ?>