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 require_once( 'HttpFunctions.php' );
  12
  13 /**
  14  * Update this version number when the ParserOutput format
  15  * changes in an incompatible way, so the parser cache
  16  * can automatically discard old data.
  17  */
  18 define( 'MW_PARSER_VERSION', '1.6.1' );
  19
  20 /**
  21  * Variable substitution O(N^2) attack
  22  *
  23  * Without countermeasures, it would be possible to attack the parser by saving
  24  * a page filled with a large number of inclusions of large pages. The size of
  25  * the generated page would be proportional to the square of the input size.
  26  * Hence, we limit the number of inclusions of any given page, thus bringing any
  27  * attack back to O(N).
  28  */
  29
  30 define( 'MAX_INCLUDE_REPEAT', 100 );
  31 define( 'MAX_INCLUDE_SIZE', 1000000 ); // 1 Million
  32
  33 define( 'RLH_FOR_UPDATE', 1 );
  34
  35 # Allowed values for $mOutputType
  36 define( 'OT_HTML', 1 );
  37 define( 'OT_WIKI', 2 );
  38 define( 'OT_MSG' , 3 );
  39
  40 # string parameter for extractTags which will cause it
  41 # to strip HTML comments in addition to regular
  42 # <XML>-style tags. This should not be anything we
  43 # may want to use in wikisyntax
  44 define( 'STRIP_COMMENTS', 'HTMLCommentStrip' );
  45
  46 # Constants needed for external link processing
  47 define( 'HTTP_PROTOCOLS', 'http:\/\/|https:\/\/' );
  48 # Everything except bracket, space, or control characters
  49 define( 'EXT_LINK_URL_CLASS', '[^][<>"\\x00-\\x20\\x7F]' );
  50 # Including space
  51 define( 'EXT_LINK_TEXT_CLASS', '[^\]\\x00-\\x1F\\x7F]' );
  52 define( 'EXT_IMAGE_FNAME_CLASS', '[A-Za-z0-9_.,~%\\-+&;#*?!=()@\\x80-\\xFF]' );
  53 define( 'EXT_IMAGE_EXTENSIONS', 'gif|png|jpg|jpeg' );
  54 define( 'EXT_LINK_BRACKETED',  '/\[(\b(' . wfUrlProtocols() . ')'.EXT_LINK_URL_CLASS.'+) *('.EXT_LINK_TEXT_CLASS.'*?)\]/S' );
  55 define( 'EXT_IMAGE_REGEX',
  56         '/^('.HTTP_PROTOCOLS.')'.  # Protocol
  57         '('.EXT_LINK_URL_CLASS.'+)\\/'.  # Hostname and path
  58         '('.EXT_IMAGE_FNAME_CLASS.'+)\\.((?i)'.EXT_IMAGE_EXTENSIONS.')$/S' # Filename
  59 );
  60
  61 /**
  62  * PHP Parser
  63  *
  64  * Processes wiki markup
  65  *
  66  * <pre>
  67  * There are three main entry points into the Parser class:
  68  * parse()
  69  *   produces HTML output
  70  * preSaveTransform().
  71  *   produces altered wiki markup.
  72  * transformMsg()
  73  *   performs brace substitution on MediaWiki messages
  74  *
  75  * Globals used:
  76  *    objects:   $wgLang, $wgContLang
  77  *
  78  * NOT $wgArticle, $wgUser or $wgTitle. Keep them away!
  79  *
  80  * settings:
  81  *  $wgUseTex*, $wgUseDynamicDates*, $wgInterwikiMagic*,
  82  *  $wgNamespacesWithSubpages, $wgAllowExternalImages*,
  83  *  $wgLocaltimezone, $wgAllowSpecialInclusion*
  84  *
  85  *  * only within ParserOptions
  86  * </pre>
  87  *
  88  * @package MediaWiki
  89  */
  90 class Parser
  91 {
  92         /**#@+
  93          * @private
  94          */
  95         # Persistent:
  96         var $mTagHooks, $mFunctionHooks;
  97
  98         # Cleared with clearState():
  99         var $mOutput, $mAutonumber, $mDTopen, $mStripState = array();
 100         var $mVariables, $mIncludeCount, $mArgStack, $mLastSection, $mInPre;
 101         var $mInterwikiLinkHolders, $mLinkHolders, $mUniqPrefix;
 102         var $mTemplates,        // cache of already loaded templates, avoids
 103                                 // multiple SQL queries for the same string
 104             $mTemplatePath;     // stores an unsorted hash of all the templates already loaded
 105                                 // in this path. Used for loop detection.
 106
 107         # Temporary
 108         # These are variables reset at least once per parse regardless of $clearState
 109         var $mOptions,      // ParserOptions object
 110                 $mTitle,        // Title context, used for self-link rendering and similar things
 111                 $mOutputType,   // Output type, one of the OT_xxx constants
 112                 $mRevisionId;   // ID to display in {{REVISIONID}} tags
 113
 114         /**#@-*/
 115
 116         /**
 117          * Constructor
 118          *
 119          * @public
 120          */
 121         function Parser() {
 122                 $this->mTagHooks = array();
 123                 $this->mFunctionHooks = array();
 124                 $this->clearState();
 125         }
 126
 127         /**
 128          * Clear Parser state
 129          *
 130          * @private
 131          */
 132         function clearState() {
 133                 $this->mOutput = new ParserOutput;
 134                 $this->mAutonumber = 0;
 135                 $this->mLastSection = '';
 136                 $this->mDTopen = false;
 137                 $this->mVariables = false;
 138                 $this->mIncludeCount = array();
 139                 $this->mStripState = array();
 140                 $this->mArgStack = array();
 141                 $this->mInPre = false;
 142                 $this->mInterwikiLinkHolders = array(
 143                         'texts' => array(),
 144                         'titles' => array()
 145                 );
 146                 $this->mLinkHolders = array(
 147                         'namespaces' => array(),
 148                         'dbkeys' => array(),
 149                         'queries' => array(),
 150                         'texts' => array(),
 151                         'titles' => array()
 152                 );
 153                 $this->mRevisionId = null;
 154
 155                 /**
 156                  * Prefix for temporary replacement strings for the multipass parser.
 157                  * \x07 should never appear in input as it's disallowed in XML.
 158                  * Using it at the front also gives us a little extra robustness
 159                  * since it shouldn't match when butted up against identifier-like
 160                  * string constructs.
 161                  */
 162                 $this->mUniqPrefix = "\x07UNIQ" . Parser::getRandomString();
 163
 164                 # Clear these on every parse, bug 4549
 165                 $this->mTemplates = array();
 166                 $this->mTemplatePath = array();
 167
 168                 $this->mShowToc = true;
 169                 $this->mForceTocPosition = false;
 170
 171                 wfRunHooks( 'ParserClearState', array( &$this ) );
 172         }
 173
 174         /**
 175          * Accessor for mUniqPrefix.
 176          *
 177          * @public
 178          */
 179         function UniqPrefix() {
 180                 return $this->mUniqPrefix;
 181         }
 182
 183         /**
 184          * Convert wikitext to HTML
 185          * Do not call this function recursively.
 186          *
 187          * @private
 188          * @param string $text Text we want to parse
 189          * @param Title &$title A title object
 190          * @param array $options
 191          * @param boolean $linestart
 192          * @param boolean $clearState
 193          * @param int $revid number to pass in {{REVISIONID}}
 194          * @return ParserOutput a ParserOutput
 195          */
 196         function parse( $text, &$title, $options, $linestart = true, $clearState = true, $revid = null ) {
 197                 /**
 198                  * First pass--just handle <nowiki> sections, pass the rest off
 199                  * to internalParse() which does all the real work.
 200                  */
 201
 202                 global $wgUseTidy, $wgAlwaysUseTidy, $wgContLang;
 203                 $fname = 'Parser::parse';
 204                 wfProfileIn( $fname );
 205
 206                 if ( $clearState ) {
 207                         $this->clearState();
 208                 }
 209
 210                 $this->mOptions = $options;
 211                 $this->mTitle =& $title;
 212                 $this->mRevisionId = $revid;
 213                 $this->mOutputType = OT_HTML;
 214
 215                 //$text = $this->strip( $text, $this->mStripState );
 216                 // VOODOO MAGIC FIX! Sometimes the above segfaults in PHP5.
 217                 $x =& $this->mStripState;
 218
 219                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$x ) );
 220                 $text = $this->strip( $text, $x );
 221                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$x ) );
 222
 223                 # Hook to suspend the parser in this state
 224                 if ( !wfRunHooks( 'ParserBeforeInternalParse', array( &$this, &$text, &$x ) ) ) {
 225                         wfProfileOut( $fname );
 226                         return $text ;
 227                 }
 228
 229                 $text = $this->internalParse( $text );
 230
 231                 $text = $this->unstrip( $text, $this->mStripState );
 232
 233                 # Clean up special characters, only run once, next-to-last before doBlockLevels
 234                 $fixtags = array(
 235                         # french spaces, last one Guillemet-left
 236                         # only if there is something before the space
 237                         '/(.) (?=\\?|:|;|!|\\302\\273)/' => '\\1&nbsp;\\2',
 238                         # french spaces, Guillemet-right
 239                         '/(\\302\\253) /' => '\\1&nbsp;',
 240                         '/<center *>(.*)<\\/center *>/i' => '<div class="center">\\1</div>',
 241                 );
 242                 $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 243
 244                 # only once and last
 245                 $text = $this->doBlockLevels( $text, $linestart );
 246
 247                 $this->replaceLinkHolders( $text );
 248
 249                 # the position of the parserConvert() call should not be changed. it
 250                 # assumes that the links are all replaced and the only thing left
 251                 # is the <nowiki> mark.
 252                 # Side-effects: this calls $this->mOutput->setTitleText()
 253                 $text = $wgContLang->parserConvert( $text, $this );
 254
 255                 $text = $this->unstripNoWiki( $text, $this->mStripState );
 256
 257                 wfRunHooks( 'ParserBeforeTidy', array( &$this, &$text ) );
 258
 259                 $text = Sanitizer::normalizeCharReferences( $text );
 260
 261                 if (($wgUseTidy and $this->mOptions->mTidy) or $wgAlwaysUseTidy) {
 262                         $text = Parser::tidy($text);
 263                 } else {
 264                         # attempt to sanitize at least some nesting problems
 265                         # (bug #2702 and quite a few others)
 266                         $tidyregs = array(
 267                                 # ''Something [http://www.cool.com cool''] -->
 268                                 # <i>Something</i><a href="http://www.cool.com"..><i>cool></i></a>
 269                                 '/(<([bi])>)(<([bi])>)?([^<]*)(<\/?a[^<]*>)([^<]*)(<\/\\4>)?(<\/\\2>)/' =>
 270                                 '\\1\\3\\5\\8\\9\\6\\1\\3\\7\\8\\9',
 271                                 # fix up an anchor inside another anchor, only
 272                                 # at least for a single single nested link (bug 3695)
 273                                 '/(<a[^>]+>)([^<]*)(<a[^>]+>[^<]*)<\/a>(.*)<\/a>/' =>
 274                                 '\\1\\2</a>\\3</a>\\1\\4</a>',
 275                                 # fix div inside inline elements- doBlockLevels won't wrap a line which
 276                                 # contains a div, so fix it up here; replace
 277                                 # div with escaped text
 278                                 '/(<([aib]) [^>]+>)([^<]*)(<div([^>]*)>)(.*)(<\/div>)([^<]*)(<\/\\2>)/' =>
 279                                 '\\1\\3&lt;div\\5&gt;\\6&lt;/div&gt;\\8\\9',
 280                                 # remove empty italic or bold tag pairs, some
 281                                 # introduced by rules above
 282                                 '/<([bi])><\/\\1>/' => ''
 283                         );
 284
 285                         $text = preg_replace(
 286                                 array_keys( $tidyregs ),
 287                                 array_values( $tidyregs ),
 288                                 $text );
 289                 }
 290
 291                 wfRunHooks( 'ParserAfterTidy', array( &$this, &$text ) );
 292
 293                 $this->mOutput->setText( $text );
 294                 wfProfileOut( $fname );
 295
 296                 return $this->mOutput;
 297         }
 298
 299         /**
 300          * Get a random string
 301          *
 302          * @private
 303          * @static
 304          */
 305         function getRandomString() {
 306                 return dechex(mt_rand(0, 0x7fffffff)) . dechex(mt_rand(0, 0x7fffffff));
 307         }
 308
 309         function &getTitle() { return $this->mTitle; }
 310         function getOptions() { return $this->mOptions; }
 311
 312         /**
 313          * Replaces all occurrences of <$tag>content</$tag> in the text
 314          * with a random marker and returns the new text. the output parameter
 315          * $content will be an associative array filled with data on the form
 316          * $unique_marker => content.
 317          *
 318          * If $content is already set, the additional entries will be appended
 319          * If $tag is set to STRIP_COMMENTS, the function will extract
 320          * <!-- HTML comments -->
 321          *
 322          * @private
 323          * @static
 324          */
 325         function extractTagsAndParams($tag, $text, &$content, &$tags, &$params, $uniq_prefix = ''){
 326                 $rnd = $uniq_prefix . '-' . $tag . Parser::getRandomString();
 327                 if ( !$content ) {
 328                         $content = array( );
 329                 }
 330                 $n = 1;
 331                 $stripped = '';
 332
 333                 if ( !$tags ) {
 334                         $tags = array( );
 335                 }
 336
 337                 if ( !$params ) {
 338                         $params = array( );
 339                 }
 340
 341                 if( $tag == STRIP_COMMENTS ) {
 342                         $start = '/<!--()/';
 343                         $end   = '/-->/';
 344                 } else {
 345                         $start = "/<$tag(\\s+[^>]*|\\s*\/?)>/i";
 346                         $end   = "/<\\/$tag\\s*>/i";
 347                 }
 348
 349                 while ( '' != $text ) {
 350                         $p = preg_split( $start, $text, 2, PREG_SPLIT_DELIM_CAPTURE );
 351                         $stripped .= $p[0];
 352                         if( count( $p ) < 3 ) {
 353                                 break;
 354                         }
 355                         $attributes = $p[1];
 356                         $inside     = $p[2];
 357
 358                         // If $attributes ends with '/', we have an empty element tag, <tag />
 359                         if( $tag != STRIP_COMMENTS && substr( $attributes, -1 ) == '/' ) {
 360                                 $attributes = substr( $attributes, 0, -1);
 361                                 $empty = '/';
 362                         } else {
 363                                 $empty = '';
 364                         }
 365
 366                         $marker = $rnd . sprintf('%08X', $n++);
 367                         $stripped .= $marker;
 368
 369                         $tags[$marker] = "<$tag$attributes$empty>";
 370                         $params[$marker] = Sanitizer::decodeTagAttributes( $attributes );
 371
 372                         if ( $empty === '/' ) {
 373                                 // Empty element tag, <tag />
 374                                 $content[$marker] = null;
 375                                 $text = $inside;
 376                         } else {
 377                                 $q = preg_split( $end, $inside, 2 );
 378                                 $content[$marker] = $q[0];
 379                                 if( count( $q ) < 2 ) {
 380                                         # No end tag -- let it run out to the end of the text.
 381                                         break;
 382                                 } else {
 383                                         $text = $q[1];
 384                                 }
 385                         }
 386                 }
 387                 return $stripped;
 388         }
 389
 390         /**
 391          * Wrapper function for extractTagsAndParams
 392          * for cases where $tags and $params isn't needed
 393          * i.e. where tags will never have params, like <nowiki>
 394          *
 395          * @private
 396          * @static
 397          */
 398         function extractTags( $tag, $text, &$content, $uniq_prefix = '' ) {
 399                 $dummy_tags = array();
 400                 $dummy_params = array();
 401
 402                 return Parser::extractTagsAndParams( $tag, $text, $content,
 403                         $dummy_tags, $dummy_params, $uniq_prefix );
 404         }
 405
 406         /**
 407          * Strips and renders nowiki, pre, math, hiero
 408          * If $render is set, performs necessary rendering operations on plugins
 409          * Returns the text, and fills an array with data needed in unstrip()
 410          * If the $state is already a valid strip state, it adds to the state
 411          *
 412          * @param bool $stripcomments when set, HTML comments <!-- like this -->
 413          *  will be stripped in addition to other tags. This is important
 414          *  for section editing, where these comments cause confusion when
 415          *  counting the sections in the wikisource
 416          *
 417          * @private
 418          */
 419         function strip( $text, &$state, $stripcomments = false ) {
 420                 $render = ($this->mOutputType == OT_HTML);
 421                 $html_content = array();
 422                 $nowiki_content = array();
 423                 $math_content = array();
 424                 $pre_content = array();
 425                 $comment_content = array();
 426                 $ext_content = array();
 427                 $ext_tags = array();
 428                 $ext_params = array();
 429                 $gallery_content = array();
 430
 431                 # Replace any instances of the placeholders
 432                 $uniq_prefix = $this->mUniqPrefix;
 433                 #$text = str_replace( $uniq_prefix, wfHtmlEscapeFirst( $uniq_prefix ), $text );
 434
 435                 # html
 436                 global $wgRawHtml;
 437                 if( $wgRawHtml ) {
 438                         $text = Parser::extractTags('html', $text, $html_content, $uniq_prefix);
 439                         foreach( $html_content as $marker => $content ) {
 440                                 if ($render ) {
 441                                         # Raw and unchecked for validity.
 442                                         $state['html'][$marker] = $content;
 443                                 } else {
 444                                         $state['html'][$marker] = '<html>'.$content.'</html>';
 445                                 }
 446                         }
 447                 }
 448
 449                 # nowiki
 450                 $text = Parser::extractTags('nowiki', $text, $nowiki_content, $uniq_prefix);
 451                 foreach( $nowiki_content as $marker => $content ) {
 452                         if( $render ){
 453                                 $state['nowiki'][$marker] = wfEscapeHTMLTagsOnly( $content );
 454                         } else {
 455                                 $state['nowiki'][$marker] = '<nowiki>'.$content.'</nowiki>';
 456                         }
 457                 }
 458
 459                 # math
 460                 if( $this->mOptions->getUseTeX() ) {
 461                         $text = Parser::extractTags('math', $text, $math_content, $uniq_prefix);
 462                         foreach( $math_content as $marker => $content ){
 463                                 if( $render ) {
 464                                         $state['math'][$marker] = renderMath( $content );
 465                                 } else {
 466                                         $state['math'][$marker] = '<math>'.$content.'</math>';
 467                                 }
 468                         }
 469                 }
 470
 471                 # pre
 472                 $text = Parser::extractTags('pre', $text, $pre_content, $uniq_prefix);
 473                 foreach( $pre_content as $marker => $content ){
 474                         if( $render ){
 475                                 $state['pre'][$marker] = '<pre>' . wfEscapeHTMLTagsOnly( $content ) . '</pre>';
 476                         } else {
 477                                 $state['pre'][$marker] = '<pre>'.$content.'</pre>';
 478                         }
 479                 }
 480
 481                 # gallery
 482                 $text = Parser::extractTags('gallery', $text, $gallery_content, $uniq_prefix);
 483                 foreach( $gallery_content as $marker => $content ) {
 484                         require_once( 'ImageGallery.php' );
 485                         if ( $render ) {
 486                                 $state['gallery'][$marker] = $this->renderImageGallery( $content );
 487                         } else {
 488                                 $state['gallery'][$marker] = '<gallery>'.$content.'</gallery>';
 489                         }
 490                 }
 491
 492                 # Comments
 493                 $text = Parser::extractTags(STRIP_COMMENTS, $text, $comment_content, $uniq_prefix);
 494                 foreach( $comment_content as $marker => $content ){
 495                         $comment_content[$marker] = '<!--'.$content.'-->';
 496                 }
 497
 498                 # Extensions
 499                 foreach ( $this->mTagHooks as $tag => $callback ) {
 500                         $ext_content[$tag] = array();
 501                         $text = Parser::extractTagsAndParams( $tag, $text, $ext_content[$tag],
 502                                 $ext_tags[$tag], $ext_params[$tag], $uniq_prefix );
 503                         foreach( $ext_content[$tag] as $marker => $content ) {
 504                                 $full_tag = $ext_tags[$tag][$marker];
 505                                 $params = $ext_params[$tag][$marker];
 506                                 if ( $render )
 507                                         $state[$tag][$marker] = call_user_func_array( $callback, array( $content, $params, $this ) );
 508                                 else {
 509                                         if ( is_null( $content ) ) {
 510                                                 // Empty element tag
 511                                                 $state[$tag][$marker] = $full_tag;
 512                                         } else {
 513                                                 $state[$tag][$marker] = "$full_tag$content</$tag>";
 514                                         }
 515                                 }
 516                         }
 517                 }
 518
 519                 # Unstrip comments unless explicitly told otherwise.
 520                 # (The comments are always stripped prior to this point, so as to
 521                 # not invoke any extension tags / parser hooks contained within
 522                 # a comment.)
 523                 if ( !$stripcomments ) {
 524                         $tempstate = array( 'comment' => $comment_content );
 525                         $text = $this->unstrip( $text, $tempstate );
 526                         $comment_content = array();
 527                 } else {
 528                         if( !isset( $state['comment'] ) ) {
 529                                 $state['comment'] = array();
 530                         }
 531                         $state['comment'] += $comment_content;
 532                 }
 533
 534                 return $text;
 535         }
 536
 537         /**
 538          * restores pre, math, and hiero removed by strip()
 539          *
 540          * always call unstripNoWiki() after this one
 541          * @private
 542          */
 543         function unstrip( $text, &$state ) {
 544                 if ( !is_array( $state ) ) {
 545                         return $text;
 546                 }
 547
 548                 # Must expand in reverse order, otherwise nested tags will be corrupted
 549                 foreach( array_reverse( $state, true ) as $tag => $contentDict ) {
 550                         if( $tag != 'nowiki' && $tag != 'html' ) {
 551                                 foreach( array_reverse( $contentDict, true ) as $uniq => $content ) {
 552                                         $text = str_replace( $uniq, $content, $text );
 553                                 }
 554                         }
 555                 }
 556
 557                 return $text;
 558         }
 559
 560         /**
 561          * always call this after unstrip() to preserve the order
 562          *
 563          * @private
 564          */
 565         function unstripNoWiki( $text, &$state ) {
 566                 if ( !is_array( $state ) ) {
 567                         return $text;
 568                 }
 569
 570                 # Must expand in reverse order, otherwise nested tags will be corrupted
 571                 if( isset( $state['nowiki'] ) )
 572                         foreach( array_reverse( $state['nowiki'], true ) as $uniq => $content ) {
 573                                 $text = str_replace( $uniq, $content, $text );
 574                         }
 575
 576                 global $wgRawHtml;
 577                 if ($wgRawHtml && isset( $state['html'] ) ) {
 578                         foreach( array_reverse( $state['html'], true ) as $uniq => $content ) {
 579                                 $text = str_replace( $uniq, $content, $text );
 580                         }
 581                 }
 582
 583                 return $text;
 584         }
 585
 586         /**
 587          * Add an item to the strip state
 588          * Returns the unique tag which must be inserted into the stripped text
 589          * The tag will be replaced with the original text in unstrip()
 590          *
 591          * @private
 592          */
 593         function insertStripItem( $text, &$state ) {
 594                 $rnd = $this->mUniqPrefix . '-item' . Parser::getRandomString();
 595                 if ( !$state ) {
 596                         $state = array(
 597                           'html' => array(),
 598                           'nowiki' => array(),
 599                           'math' => array(),
 600                           'pre' => array(),
 601                           'comment' => array(),
 602                           'gallery' => array(),
 603                         );
 604                 }
 605                 $state['item'][$rnd] = $text;
 606                 return $rnd;
 607         }
 608
 609         /**
 610          * Interface with html tidy, used if $wgUseTidy = true.
 611          * If tidy isn't able to correct the markup, the original will be
 612          * returned in all its glory with a warning comment appended.
 613          *
 614          * Either the external tidy program or the in-process tidy extension
 615          * will be used depending on availability. Override the default
 616          * $wgTidyInternal setting to disable the internal if it's not working.
 617          *
 618          * @param string $text Hideous HTML input
 619          * @return string Corrected HTML output
 620          * @public
 621          * @static
 622          */
 623         function tidy( $text ) {
 624                 global $wgTidyInternal;
 625                 $wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"'.
 626 ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>'.
 627 '<head><title>test</title></head><body>'.$text.'</body></html>';
 628                 if( $wgTidyInternal ) {
 629                         $correctedtext = Parser::internalTidy( $wrappedtext );
 630                 } else {
 631                         $correctedtext = Parser::externalTidy( $wrappedtext );
 632                 }
 633                 if( is_null( $correctedtext ) ) {
 634                         wfDebug( "Tidy error detected!\n" );
 635                         return $text . "\n<!-- Tidy found serious XHTML errors -->\n";
 636                 }
 637                 return $correctedtext;
 638         }
 639
 640         /**
 641          * Spawn an external HTML tidy process and get corrected markup back from it.
 642          *
 643          * @private
 644          * @static
 645          */
 646         function externalTidy( $text ) {
 647                 global $wgTidyConf, $wgTidyBin, $wgTidyOpts;
 648                 $fname = 'Parser::externalTidy';
 649                 wfProfileIn( $fname );
 650
 651                 $cleansource = '';
 652                 $opts = ' -utf8';
 653
 654                 $descriptorspec = array(
 655                         0 => array('pipe', 'r'),
 656                         1 => array('pipe', 'w'),
 657                         2 => array('file', '/dev/null', 'a')
 658                 );
 659                 $pipes = array();
 660                 $process = proc_open("$wgTidyBin -config $wgTidyConf $wgTidyOpts$opts", $descriptorspec, $pipes);
 661                 if (is_resource($process)) {
 662                         // Theoretically, this style of communication could cause a deadlock
 663                         // here. If the stdout buffer fills up, then writes to stdin could
 664                         // block. This doesn't appear to happen with tidy, because tidy only
 665                         // writes to stdout after it's finished reading from stdin. Search
 666                         // for tidyParseStdin and tidySaveStdout in console/tidy.c
 667                         fwrite($pipes[0], $text);
 668                         fclose($pipes[0]);
 669                         while (!feof($pipes[1])) {
 670                                 $cleansource .= fgets($pipes[1], 1024);
 671                         }
 672                         fclose($pipes[1]);
 673                         proc_close($process);
 674                 }
 675
 676                 wfProfileOut( $fname );
 677
 678                 if( $cleansource == '' && $text != '') {
 679                         // Some kind of error happened, so we couldn't get the corrected text.
 680                         // Just give up; we'll use the source text and append a warning.
 681                         return null;
 682                 } else {
 683                         return $cleansource;
 684                 }
 685         }
 686
 687         /**
 688          * Use the HTML tidy PECL extension to use the tidy library in-process,
 689          * saving the overhead of spawning a new process. Currently written to
 690          * the PHP 4.3.x version of the extension, may not work on PHP 5.
 691          *
 692          * 'pear install tidy' should be able to compile the extension module.
 693          *
 694          * @private
 695          * @static
 696          */
 697         function internalTidy( $text ) {
 698                 global $wgTidyConf;
 699                 $fname = 'Parser::internalTidy';
 700                 wfProfileIn( $fname );
 701
 702                 tidy_load_config( $wgTidyConf );
 703                 tidy_set_encoding( 'utf8' );
 704                 tidy_parse_string( $text );
 705                 tidy_clean_repair();
 706                 if( tidy_get_status() == 2 ) {
 707                         // 2 is magic number for fatal error
 708                         // http://www.php.net/manual/en/function.tidy-get-status.php
 709                         $cleansource = null;
 710                 } else {
 711                         $cleansource = tidy_get_output();
 712                 }
 713                 wfProfileOut( $fname );
 714                 return $cleansource;
 715         }
 716
 717         /**
 718          * parse the wiki syntax used to render tables
 719          *
 720          * @private
 721          */
 722         function doTableStuff ( $t ) {
 723                 $fname = 'Parser::doTableStuff';
 724                 wfProfileIn( $fname );
 725
 726                 $t = explode ( "\n" , $t ) ;
 727                 $td = array () ; # Is currently a td tag open?
 728                 $ltd = array () ; # Was it TD or TH?
 729                 $tr = array () ; # Is currently a tr tag open?
 730                 $ltr = array () ; # tr attributes
 731                 $has_opened_tr = array(); # Did this table open a <tr> element?
 732                 $indent_level = 0; # indent level of the table
 733                 foreach ( $t AS $k => $x )
 734                 {
 735                         $x = trim ( $x ) ;
 736                         $fc = substr ( $x , 0 , 1 ) ;
 737                         if ( preg_match( '/^(:*)\{\|(.*)$/', $x, $matches ) ) {
 738                                 $indent_level = strlen( $matches[1] );
 739
 740                                 $attributes = $this->unstripForHTML( $matches[2] );
 741
 742                                 $t[$k] = str_repeat( '<dl><dd>', $indent_level ) .
 743                                         '<table' . Sanitizer::fixTagAttributes ( $attributes, 'table' ) . '>' ;
 744                                 array_push ( $td , false ) ;
 745                                 array_push ( $ltd , '' ) ;
 746                                 array_push ( $tr , false ) ;
 747                                 array_push ( $ltr , '' ) ;
 748                                 array_push ( $has_opened_tr, false );
 749                         }
 750                         else if ( count ( $td ) == 0 ) { } # Don't do any of the following
 751                         else if ( '|}' == substr ( $x , 0 , 2 ) ) {
 752                                 $z = "</table>" . substr ( $x , 2);
 753                                 $l = array_pop ( $ltd ) ;
 754                                 if ( !array_pop ( $has_opened_tr ) ) $z = "<tr><td></td></tr>" . $z ;
 755                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 756                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 757                                 array_pop ( $ltr ) ;
 758                                 $t[$k] = $z . str_repeat( '</dd></dl>', $indent_level );
 759                         }
 760                         else if ( '|-' == substr ( $x , 0 , 2 ) ) { # Allows for |---------------
 761                                 $x = substr ( $x , 1 ) ;
 762                                 while ( $x != '' && substr ( $x , 0 , 1 ) == '-' ) $x = substr ( $x , 1 ) ;
 763                                 $z = '' ;
 764                                 $l = array_pop ( $ltd ) ;
 765                                 array_pop ( $has_opened_tr );
 766                                 array_push ( $has_opened_tr , true ) ;
 767                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 768                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 769                                 array_pop ( $ltr ) ;
 770                                 $t[$k] = $z ;
 771                                 array_push ( $tr , false ) ;
 772                                 array_push ( $td , false ) ;
 773                                 array_push ( $ltd , '' ) ;
 774                                 $attributes = $this->unstripForHTML( $x );
 775                                 array_push ( $ltr , Sanitizer::fixTagAttributes ( $attributes, 'tr' ) ) ;
 776                         }
 777                         else if ( '|' == $fc || '!' == $fc || '|+' == substr ( $x , 0 , 2 ) ) { # Caption
 778                                 # $x is a table row
 779                                 if ( '|+' == substr ( $x , 0 , 2 ) ) {
 780                                         $fc = '+' ;
 781                                         $x = substr ( $x , 1 ) ;
 782                                 }
 783                                 $after = substr ( $x , 1 ) ;
 784                                 if ( $fc == '!' ) $after = str_replace ( '!!' , '||' , $after ) ;
 785
 786                                 // Split up multiple cells on the same line.
 787                                 // FIXME: This can result in improper nesting of tags processed
 788                                 // by earlier parser steps, but should avoid splitting up eg
 789                                 // attribute values containing literal "||".
 790                                 $after = wfExplodeMarkup( '||', $after );
 791
 792                                 $t[$k] = '' ;
 793
 794                                 # Loop through each table cell
 795                                 foreach ( $after AS $theline )
 796                                 {
 797                                         $z = '' ;
 798                                         if ( $fc != '+' )
 799                                         {
 800                                                 $tra = array_pop ( $ltr ) ;
 801                                                 if ( !array_pop ( $tr ) ) $z = '<tr'.$tra.">\n" ;
 802                                                 array_push ( $tr , true ) ;
 803                                                 array_push ( $ltr , '' ) ;
 804                                                 array_pop ( $has_opened_tr );
 805                                                 array_push ( $has_opened_tr , true ) ;
 806                                         }
 807
 808                                         $l = array_pop ( $ltd ) ;
 809                                         if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 810                                         if ( $fc == '|' ) $l = 'td' ;
 811                                         else if ( $fc == '!' ) $l = 'th' ;
 812                                         else if ( $fc == '+' ) $l = 'caption' ;
 813                                         else $l = '' ;
 814                                         array_push ( $ltd , $l ) ;
 815
 816                                         # Cell parameters
 817                                         $y = explode ( '|' , $theline , 2 ) ;
 818                                         # Note that a '|' inside an invalid link should not
 819                                         # be mistaken as delimiting cell parameters
 820                                         if ( strpos( $y[0], '[[' ) !== false ) {
 821                                                 $y = array ($theline);
 822                                         }
 823                                         if ( count ( $y ) == 1 )
 824                                                 $y = "{$z}<{$l}>{$y[0]}" ;
 825                                         else {
 826                                                 $attributes = $this->unstripForHTML( $y[0] );
 827                                                 $y = "{$z}<{$l}".Sanitizer::fixTagAttributes($attributes, $l).">{$y[1]}" ;
 828                                         }
 829                                         $t[$k] .= $y ;
 830                                         array_push ( $td , true ) ;
 831                                 }
 832                         }
 833                 }
 834
 835                 # Closing open td, tr && table
 836                 while ( count ( $td ) > 0 )
 837                 {
 838                         $l = array_pop ( $ltd ) ;
 839                         if ( array_pop ( $td ) ) $t[] = '</td>' ;
 840                         if ( array_pop ( $tr ) ) $t[] = '</tr>' ;
 841                         if ( !array_pop ( $has_opened_tr ) ) $t[] = "<tr><td></td></tr>" ;
 842                         $t[] = '</table>' ;
 843                 }
 844
 845                 $t = implode ( "\n" , $t ) ;
 846                 # special case: don't return empty table
 847                 if($t == "<table>\n<tr><td></td></tr>\n</table>")
 848                         $t = '';
 849                 wfProfileOut( $fname );
 850                 return $t ;
 851         }
 852
 853         /**
 854          * Helper function for parse() that transforms wiki markup into
 855          * HTML. Only called for $mOutputType == OT_HTML.
 856          *
 857          * @private
 858          */
 859         function internalParse( $text ) {
 860                 $args = array();
 861                 $isMain = true;
 862                 $fname = 'Parser::internalParse';
 863                 wfProfileIn( $fname );
 864
 865                 # Remove <noinclude> tags and <includeonly> sections
 866                 $text = strtr( $text, array( '<onlyinclude>' => '' , '</onlyinclude>' => '' ) );
 867                 $text = strtr( $text, array( '<noinclude>' => '', '</noinclude>' => '') );
 868                 $text = preg_replace( '/<includeonly>.*?<\/includeonly>/s', '', $text );
 869
 870                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'attributeStripCallback' ) );
 871
 872                 $text = $this->replaceVariables( $text, $args );
 873
 874                 // Tables need to come after variable replacement for things to work
 875                 // properly; putting them before other transformations should keep
 876                 // exciting things like link expansions from showing up in surprising
 877                 // places.
 878                 $text = $this->doTableStuff( $text );
 879
 880                 $text = preg_replace( '/(^|\n)-----*/', '\\1<hr />', $text );
 881
 882                 $text = $this->stripToc( $text );
 883                 $text = $this->doHeadings( $text );
 884                 if($this->mOptions->getUseDynamicDates()) {
 885                         $df =& DateFormatter::getInstance();
 886                         $text = $df->reformat( $this->mOptions->getDateFormat(), $text );
 887                 }
 888                 $text = $this->doAllQuotes( $text );
 889                 $text = $this->replaceInternalLinks( $text );
 890                 $text = $this->replaceExternalLinks( $text );
 891
 892                 # replaceInternalLinks may sometimes leave behind
 893                 # absolute URLs, which have to be masked to hide them from replaceExternalLinks
 894                 $text = str_replace($this->mUniqPrefix."NOPARSE", "", $text);
 895
 896                 $text = $this->doMagicLinks( $text );
 897                 $text = $this->formatHeadings( $text, $isMain );
 898
 899                 wfProfileOut( $fname );
 900                 return $text;
 901         }
 902
 903         /**
 904          * Replace special strings like "ISBN xxx" and "RFC xxx" with
 905          * magic external links.
 906          *
 907          * @private
 908          */
 909         function &doMagicLinks( &$text ) {
 910                 $text = $this->magicISBN( $text );
 911                 $text = $this->magicRFC( $text, 'RFC ', 'rfcurl' );
 912                 $text = $this->magicRFC( $text, 'PMID ', 'pubmedurl' );
 913                 return $text;
 914         }
 915
 916         /**
 917          * Parse headers and return html
 918          *
 919          * @private
 920          */
 921         function doHeadings( $text ) {
 922                 $fname = 'Parser::doHeadings';
 923                 wfProfileIn( $fname );
 924                 for ( $i = 6; $i >= 1; --$i ) {
 925                         $h = str_repeat( '=', $i );
 926                         $text = preg_replace( "/^{$h}(.+){$h}(\\s|$)/m",
 927                           "<h{$i}>\\1</h{$i}>\\2", $text );
 928                 }
 929                 wfProfileOut( $fname );
 930                 return $text;
 931         }
 932
 933         /**
 934          * Replace single quotes with HTML markup
 935          * @private
 936          * @return string the altered text
 937          */
 938         function doAllQuotes( $text ) {
 939                 $fname = 'Parser::doAllQuotes';
 940                 wfProfileIn( $fname );
 941                 $outtext = '';
 942                 $lines = explode( "\n", $text );
 943                 foreach ( $lines as $line ) {
 944                         $outtext .= $this->doQuotes ( $line ) . "\n";
 945                 }
 946                 $outtext = substr($outtext, 0,-1);
 947                 wfProfileOut( $fname );
 948                 return $outtext;
 949         }
 950
 951         /**
 952          * Helper function for doAllQuotes()
 953          * @private
 954          */
 955         function doQuotes( $text ) {
 956                 $arr = preg_split( "/(''+)/", $text, -1, PREG_SPLIT_DELIM_CAPTURE );
 957                 if ( count( $arr ) == 1 )
 958                         return $text;
 959                 else
 960                 {
 961                         # First, do some preliminary work. This may shift some apostrophes from
 962                         # being mark-up to being text. It also counts the number of occurrences
 963                         # of bold and italics mark-ups.
 964                         $i = 0;
 965                         $numbold = 0;
 966                         $numitalics = 0;
 967                         foreach ( $arr as $r )
 968                         {
 969                                 if ( ( $i % 2 ) == 1 )
 970                                 {
 971                                         # If there are ever four apostrophes, assume the first is supposed to
 972                                         # be text, and the remaining three constitute mark-up for bold text.
 973                                         if ( strlen( $arr[$i] ) == 4 )
 974                                         {
 975                                                 $arr[$i-1] .= "'";
 976                                                 $arr[$i] = "'''";
 977                                         }
 978                                         # If there are more than 5 apostrophes in a row, assume they're all
 979                                         # text except for the last 5.
 980                                         else if ( strlen( $arr[$i] ) > 5 )
 981                                         {
 982                                                 $arr[$i-1] .= str_repeat( "'", strlen( $arr[$i] ) - 5 );
 983                                                 $arr[$i] = "'''''";
 984                                         }
 985                                         # Count the number of occurrences of bold and italics mark-ups.
 986                                         # We are not counting sequences of five apostrophes.
 987                                         if ( strlen( $arr[$i] ) == 2 ) $numitalics++;  else
 988                                         if ( strlen( $arr[$i] ) == 3 ) $numbold++;     else
 989                                         if ( strlen( $arr[$i] ) == 5 ) { $numitalics++; $numbold++; }
 990                                 }
 991                                 $i++;
 992                         }
 993
 994                         # If there is an odd number of both bold and italics, it is likely
 995                         # that one of the bold ones was meant to be an apostrophe followed
 996                         # by italics. Which one we cannot know for certain, but it is more
 997                         # likely to be one that has a single-letter word before it.
 998                         if ( ( $numbold % 2 == 1 ) && ( $numitalics % 2 == 1 ) )
 999                         {
1000                                 $i = 0;
1001                                 $firstsingleletterword = -1;
1002                                 $firstmultiletterword = -1;
1003                                 $firstspace = -1;
1004                                 foreach ( $arr as $r )
1005                                 {
1006                                         if ( ( $i % 2 == 1 ) and ( strlen( $r ) == 3 ) )
1007                                         {
1008                                                 $x1 = substr ($arr[$i-1], -1);
1009                                                 $x2 = substr ($arr[$i-1], -2, 1);
1010                                                 if ($x1 == ' ') {
1011                                                         if ($firstspace == -1) $firstspace = $i;
1012                                                 } else if ($x2 == ' ') {
1013                                                         if ($firstsingleletterword == -1) $firstsingleletterword = $i;
1014                                                 } else {
1015                                                         if ($firstmultiletterword == -1) $firstmultiletterword = $i;
1016                                                 }
1017                                         }
1018                                         $i++;
1019                                 }
1020
1021                                 # If there is a single-letter word, use it!
1022                                 if ($firstsingleletterword > -1)
1023                                 {
1024                                         $arr [ $firstsingleletterword ] = "''";
1025                                         $arr [ $firstsingleletterword-1 ] .= "'";
1026                                 }
1027                                 # If not, but there's a multi-letter word, use that one.
1028                                 else if ($firstmultiletterword > -1)
1029                                 {
1030                                         $arr [ $firstmultiletterword ] = "''";
1031                                         $arr [ $firstmultiletterword-1 ] .= "'";
1032                                 }
1033                                 # ... otherwise use the first one that has neither.
1034                                 # (notice that it is possible for all three to be -1 if, for example,
1035                                 # there is only one pentuple-apostrophe in the line)
1036                                 else if ($firstspace > -1)
1037                                 {
1038                                         $arr [ $firstspace ] = "''";
1039                                         $arr [ $firstspace-1 ] .= "'";
1040                                 }
1041                         }
1042
1043                         # Now let's actually convert our apostrophic mush to HTML!
1044                         $output = '';
1045                         $buffer = '';
1046                         $state = '';
1047                         $i = 0;
1048                         foreach ($arr as $r)
1049                         {
1050                                 if (($i % 2) == 0)
1051                                 {
1052                                         if ($state == 'both')
1053                                                 $buffer .= $r;
1054                                         else
1055                                                 $output .= $r;
1056                                 }
1057                                 else
1058                                 {
1059                                         if (strlen ($r) == 2)
1060                                         {
1061                                                 if ($state == 'i')
1062                                                 { $output .= '</i>'; $state = ''; }
1063                                                 else if ($state == 'bi')
1064                                                 { $output .= '</i>'; $state = 'b'; }
1065                                                 else if ($state == 'ib')
1066                                                 { $output .= '</b></i><b>'; $state = 'b'; }
1067                                                 else if ($state == 'both')
1068                                                 { $output .= '<b><i>'.$buffer.'</i>'; $state = 'b'; }
1069                                                 else # $state can be 'b' or ''
1070                                                 { $output .= '<i>'; $state .= 'i'; }
1071                                         }
1072                                         else if (strlen ($r) == 3)
1073                                         {
1074                                                 if ($state == 'b')
1075                                                 { $output .= '</b>'; $state = ''; }
1076                                                 else if ($state == 'bi')
1077                                                 { $output .= '</i></b><i>'; $state = 'i'; }
1078                                                 else if ($state == 'ib')
1079                                                 { $output .= '</b>'; $state = 'i'; }
1080                                                 else if ($state == 'both')
1081                                                 { $output .= '<i><b>'.$buffer.'</b>'; $state = 'i'; }
1082                                                 else # $state can be 'i' or ''
1083                                                 { $output .= '<b>'; $state .= 'b'; }
1084                                         }
1085                                         else if (strlen ($r) == 5)
1086                                         {
1087                                                 if ($state == 'b')
1088                                                 { $output .= '</b><i>'; $state = 'i'; }
1089                                                 else if ($state == 'i')
1090                                                 { $output .= '</i><b>'; $state = 'b'; }
1091                                                 else if ($state == 'bi')
1092                                                 { $output .= '</i></b>'; $state = ''; }
1093                                                 else if ($state == 'ib')
1094                                                 { $output .= '</b></i>'; $state = ''; }
1095                                                 else if ($state == 'both')
1096                                                 { $output .= '<i><b>'.$buffer.'</b></i>'; $state = ''; }
1097                                                 else # ($state == '')
1098                                                 { $buffer = ''; $state = 'both'; }
1099                                         }
1100                                 }
1101                                 $i++;
1102                         }
1103                         # Now close all remaining tags.  Notice that the order is important.
1104                         if ($state == 'b' || $state == 'ib')
1105                                 $output .= '</b>';
1106                         if ($state == 'i' || $state == 'bi' || $state == 'ib')
1107                                 $output .= '</i>';
1108                         if ($state == 'bi')
1109                                 $output .= '</b>';
1110                         if ($state == 'both')
1111                                 $output .= '<b><i>'.$buffer.'</i></b>';
1112                         return $output;
1113                 }
1114         }
1115
1116         /**
1117          * Replace external links
1118          *
1119          * Note: this is all very hackish and the order of execution matters a lot.
1120          * Make sure to run maintenance/parserTests.php if you change this code.
1121          *
1122          * @private
1123          */
1124         function replaceExternalLinks( $text ) {
1125                 global $wgContLang;
1126                 $fname = 'Parser::replaceExternalLinks';
1127                 wfProfileIn( $fname );
1128
1129                 $sk =& $this->mOptions->getSkin();
1130
1131                 $bits = preg_split( EXT_LINK_BRACKETED, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1132
1133                 $s = $this->replaceFreeExternalLinks( array_shift( $bits ) );
1134
1135                 $i = 0;
1136                 while ( $i<count( $bits ) ) {
1137                         $url = $bits[$i++];
1138                         $protocol = $bits[$i++];
1139                         $text = $bits[$i++];
1140                         $trail = $bits[$i++];
1141
1142                         # The characters '<' and '>' (which were escaped by
1143                         # removeHTMLtags()) should not be included in
1144                         # URLs, per RFC 2396.
1145                         if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1146                                 $text = substr($url, $m2[0][1]) . ' ' . $text;
1147                                 $url = substr($url, 0, $m2[0][1]);
1148                         }
1149
1150                         # If the link text is an image URL, replace it with an <img> tag
1151                         # This happened by accident in the original parser, but some people used it extensively
1152                         $img = $this->maybeMakeExternalImage( $text );
1153                         if ( $img !== false ) {
1154                                 $text = $img;
1155                         }
1156
1157                         $dtrail = '';
1158
1159                         # Set linktype for CSS - if URL==text, link is essentially free
1160                         $linktype = ($text == $url) ? 'free' : 'text';
1161
1162                         # No link text, e.g. [http://domain.tld/some.link]
1163                         if ( $text == '' ) {
1164                                 # Autonumber if allowed. See bug #5918
1165                                 if ( strpos( wfUrlProtocols(), substr($protocol, 0, strpos($protocol, ':')) ) !== false ) {
1166                                         $text = '[' . ++$this->mAutonumber . ']';
1167                                         $linktype = 'autonumber';
1168                                 } else {
1169                                         # Otherwise just use the URL
1170                                         $text = htmlspecialchars( $url );
1171                                         $linktype = 'free';
1172                                 }
1173                         } else {
1174                                 # Have link text, e.g. [http://domain.tld/some.link text]s
1175                                 # Check for trail
1176                                 list( $dtrail, $trail ) = Linker::splitTrail( $trail );
1177                         }
1178
1179                         $text = $wgContLang->markNoConversion($text);
1180
1181                         # Normalize any HTML entities in input. They will be
1182                         # re-escaped by makeExternalLink().
1183                         $url = Sanitizer::decodeCharReferences( $url );
1184
1185                         # Process the trail (i.e. everything after this link up until start of the next link),
1186                         # replacing any non-bracketed links
1187                         $trail = $this->replaceFreeExternalLinks( $trail );
1188
1189                         # Use the encoded URL
1190                         # This means that users can paste URLs directly into the text
1191                         # Funny characters like &ouml; aren't valid in URLs anyway
1192                         # This was changed in August 2004
1193                         $s .= $sk->makeExternalLink( $url, $text, false, $linktype, $this->mTitle->getNamespace() ) . $dtrail . $trail;
1194
1195                         # Register link in the output object.
1196                         # Replace unnecessary URL escape codes with the referenced character
1197                         # This prevents spammers from hiding links from the filters
1198                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1199                         $this->mOutput->addExternalLink( $pasteurized );
1200                 }
1201
1202                 wfProfileOut( $fname );
1203                 return $s;
1204         }
1205
1206         /**
1207          * Replace anything that looks like a URL with a link
1208          * @private
1209          */
1210         function replaceFreeExternalLinks( $text ) {
1211                 global $wgContLang;
1212                 $fname = 'Parser::replaceFreeExternalLinks';
1213                 wfProfileIn( $fname );
1214
1215                 $bits = preg_split( '/(\b(?:' . wfUrlProtocols() . '))/S', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1216                 $s = array_shift( $bits );
1217                 $i = 0;
1218
1219                 $sk =& $this->mOptions->getSkin();
1220
1221                 while ( $i < count( $bits ) ){
1222                         $protocol = $bits[$i++];
1223                         $remainder = $bits[$i++];
1224
1225                         if ( preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $remainder, $m ) ) {
1226                                 # Found some characters after the protocol that look promising
1227                                 $url = $protocol . $m[1];
1228                                 $trail = $m[2];
1229
1230                                 # special case: handle urls as url args:
1231                                 # http://www.example.com/foo?=http://www.example.com/bar
1232                                 if(strlen($trail) == 0 &&
1233                                         isset($bits[$i]) &&
1234                                         preg_match('/^'. wfUrlProtocols() . '$/S', $bits[$i]) &&
1235                                         preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $bits[$i + 1], $m ))
1236                                 {
1237                                         # add protocol, arg
1238                                         $url .= $bits[$i] . $m[1]; # protocol, url as arg to previous link
1239                                         $i += 2;
1240                                         $trail = $m[2];
1241                                 }
1242
1243                                 # The characters '<' and '>' (which were escaped by
1244                                 # removeHTMLtags()) should not be included in
1245                                 # URLs, per RFC 2396.
1246                                 if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1247                                         $trail = substr($url, $m2[0][1]) . $trail;
1248                                         $url = substr($url, 0, $m2[0][1]);
1249                                 }
1250
1251                                 # Move trailing punctuation to $trail
1252                                 $sep = ',;\.:!?';
1253                                 # If there is no left bracket, then consider right brackets fair game too
1254                                 if ( strpos( $url, '(' ) === false ) {
1255                                         $sep .= ')';
1256                                 }
1257
1258                                 $numSepChars = strspn( strrev( $url ), $sep );
1259                                 if ( $numSepChars ) {
1260                                         $trail = substr( $url, -$numSepChars ) . $trail;
1261                                         $url = substr( $url, 0, -$numSepChars );
1262                                 }
1263
1264                                 # Normalize any HTML entities in input. They will be
1265                                 # re-escaped by makeExternalLink() or maybeMakeExternalImage()
1266                                 $url = Sanitizer::decodeCharReferences( $url );
1267
1268                                 # Is this an external image?
1269                                 $text = $this->maybeMakeExternalImage( $url );
1270                                 if ( $text === false ) {
1271                                         # Not an image, make a link
1272                                         $text = $sk->makeExternalLink( $url, $wgContLang->markNoConversion($url), true, 'free', $this->mTitle->getNamespace() );
1273                                         # Register it in the output object...
1274                                         # Replace unnecessary URL escape codes with their equivalent characters
1275                                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1276                                         $this->mOutput->addExternalLink( $pasteurized );
1277                                 }
1278                                 $s .= $text . $trail;
1279                         } else {
1280                                 $s .= $protocol . $remainder;
1281                         }
1282                 }
1283                 wfProfileOut( $fname );
1284                 return $s;
1285         }
1286
1287         /**
1288          * Replace unusual URL escape codes with their equivalent characters
1289          * @param string
1290          * @return string
1291          * @static
1292          * @fixme This can merge genuinely required bits in the path or query string,
1293          *        breaking legit URLs. A proper fix would treat the various parts of
1294          *        the URL differently; as a workaround, just use the output for
1295          *        statistical records, not for actual linking/output.
1296          */
1297         function replaceUnusualEscapes( $url ) {
1298                 return preg_replace_callback( '/%[0-9A-Fa-f]{2}/',
1299                         array( 'Parser', 'replaceUnusualEscapesCallback' ), $url );
1300         }
1301
1302         /**
1303          * Callback function used in replaceUnusualEscapes().
1304          * Replaces unusual URL escape codes with their equivalent character
1305          * @static
1306          * @private
1307          */
1308         function replaceUnusualEscapesCallback( $matches ) {
1309                 $char = urldecode( $matches[0] );
1310                 $ord = ord( $char );
1311                 // Is it an unsafe or HTTP reserved character according to RFC 1738?
1312                 if ( $ord > 32 && $ord < 127 && strpos( '<>"#{}|\^~[]`;/?', $char ) === false ) {
1313                         // No, shouldn't be escaped
1314                         return $char;
1315                 } else {
1316                         // Yes, leave it escaped
1317                         return $matches[0];
1318                 }
1319         }
1320
1321         /**
1322          * make an image if it's allowed, either through the global
1323          * option or through the exception
1324          * @private
1325          */
1326         function maybeMakeExternalImage( $url ) {
1327                 $sk =& $this->mOptions->getSkin();
1328                 $imagesfrom = $this->mOptions->getAllowExternalImagesFrom();
1329                 $imagesexception = !empty($imagesfrom);
1330                 $text = false;
1331                 if ( $this->mOptions->getAllowExternalImages()
1332                      || ( $imagesexception && strpos( $url, $imagesfrom ) === 0 ) ) {
1333                         if ( preg_match( EXT_IMAGE_REGEX, $url ) ) {
1334                                 # Image found
1335                                 $text = $sk->makeExternalImage( htmlspecialchars( $url ) );
1336                         }
1337                 }
1338                 return $text;
1339         }
1340
1341         /**
1342          * Process [[ ]] wikilinks
1343          *
1344          * @private
1345          */
1346         function replaceInternalLinks( $s ) {
1347                 global $wgContLang;
1348                 static $fname = 'Parser::replaceInternalLinks' ;
1349
1350                 wfProfileIn( $fname );
1351
1352                 wfProfileIn( $fname.'-setup' );
1353                 static $tc = FALSE;
1354                 # the % is needed to support urlencoded titles as well
1355                 if ( !$tc ) { $tc = Title::legalChars() . '#%'; }
1356
1357                 $sk =& $this->mOptions->getSkin();
1358
1359                 #split the entire text string on occurences of [[
1360                 $a = explode( '[[', ' ' . $s );
1361                 #get the first element (all text up to first [[), and remove the space we added
1362                 $s = array_shift( $a );
1363                 $s = substr( $s, 1 );
1364
1365                 # Match a link having the form [[namespace:link|alternate]]trail
1366                 static $e1 = FALSE;
1367                 if ( !$e1 ) { $e1 = "/^([{$tc}]+)(?:\\|(.+?))?]](.*)\$/sD"; }
1368                 # Match cases where there is no "]]", which might still be images
1369                 static $e1_img = FALSE;
1370                 if ( !$e1_img ) { $e1_img = "/^([{$tc}]+)\\|(.*)\$/sD"; }
1371                 # Match the end of a line for a word that's not followed by whitespace,
1372                 # e.g. in the case of 'The Arab al[[Razi]]', 'al' will be matched
1373                 $e2 = wfMsgForContent( 'linkprefix' );
1374
1375                 $useLinkPrefixExtension = $wgContLang->linkPrefixExtension();
1376
1377                 if( is_null( $this->mTitle ) ) {
1378                         wfDebugDieBacktrace( 'nooo' );
1379                 }
1380                 $nottalk = !$this->mTitle->isTalkPage();
1381
1382                 if ( $useLinkPrefixExtension ) {
1383                         if ( preg_match( $e2, $s, $m ) ) {
1384                                 $first_prefix = $m[2];
1385                         } else {
1386                                 $first_prefix = false;
1387                         }
1388                 } else {
1389                         $prefix = '';
1390                 }
1391
1392                 $selflink = $this->mTitle->getPrefixedText();
1393                 wfProfileOut( $fname.'-setup' );
1394
1395                 $checkVariantLink = sizeof($wgContLang->getVariants())>1;
1396                 $useSubpages = $this->areSubpagesAllowed();
1397
1398                 # Loop for each link
1399                 for ($k = 0; isset( $a[$k] ); $k++) {
1400                         $line = $a[$k];
1401                         if ( $useLinkPrefixExtension ) {
1402                                 wfProfileIn( $fname.'-prefixhandling' );
1403                                 if ( preg_match( $e2, $s, $m ) ) {
1404                                         $prefix = $m[2];
1405                                         $s = $m[1];
1406                                 } else {
1407                                         $prefix='';
1408                                 }
1409                                 # first link
1410                                 if($first_prefix) {
1411                                         $prefix = $first_prefix;
1412                                         $first_prefix = false;
1413                                 }
1414                                 wfProfileOut( $fname.'-prefixhandling' );
1415                         }
1416
1417                         $might_be_img = false;
1418
1419                         if ( preg_match( $e1, $line, $m ) ) { # page with normal text or alt
1420                                 $text = $m[2];
1421                                 # If we get a ] at the beginning of $m[3] that means we have a link that's something like:
1422                                 # [[Image:Foo.jpg|[http://example.com desc]]] <- having three ] in a row fucks up,
1423                                 # the real problem is with the $e1 regex
1424                                 # See bug 1300.
1425                                 #
1426                                 # Still some problems for cases where the ] is meant to be outside punctuation,
1427                                 # and no image is in sight. See bug 2095.
1428                                 #
1429                                 if( $text !== '' &&
1430                                         preg_match( "/^\](.*)/s", $m[3], $n ) &&
1431                                         strpos($text, '[') !== false
1432                                 )
1433                                 {
1434                                         $text .= ']'; # so that replaceExternalLinks($text) works later
1435                                         $m[3] = $n[1];
1436                                 }
1437                                 # fix up urlencoded title texts
1438                                 if(preg_match('/%/', $m[1] ))
1439                                         # Should anchors '#' also be rejected?
1440                                         $m[1] = str_replace( array('<', '>'), array('&lt;', '&gt;'), urldecode($m[1]) );
1441                                 $trail = $m[3];
1442                         } elseif( preg_match($e1_img, $line, $m) ) { # Invalid, but might be an image with a link in its caption
1443                                 $might_be_img = true;
1444                                 $text = $m[2];
1445                                 if(preg_match('/%/', $m[1] )) $m[1] = urldecode($m[1]);
1446                                 $trail = "";
1447                         } else { # Invalid form; output directly
1448                                 $s .= $prefix . '[[' . $line ;
1449                                 continue;
1450                         }
1451
1452                         # Don't allow internal links to pages containing
1453                         # PROTO: where PROTO is a valid URL protocol; these
1454                         # should be external links.
1455                         if (preg_match('/^(\b(?:' . wfUrlProtocols() . '))/', $m[1])) {
1456                                 $s .= $prefix . '[[' . $line ;
1457                                 continue;
1458                         }
1459
1460                         # Make subpage if necessary
1461                         if( $useSubpages ) {
1462                                 $link = $this->maybeDoSubpageLink( $m[1], $text );
1463                         } else {
1464                                 $link = $m[1];
1465                         }
1466
1467                         $noforce = (substr($m[1], 0, 1) != ':');
1468                         if (!$noforce) {
1469                                 # Strip off leading ':'
1470                                 $link = substr($link, 1);
1471                         }
1472
1473                         $nt = Title::newFromText( $this->unstripNoWiki($link, $this->mStripState) );
1474                         if( !$nt ) {
1475                                 $s .= $prefix . '[[' . $line;
1476                                 continue;
1477                         }
1478
1479                         #check other language variants of the link
1480                         #if the article does not exist
1481                         if( $checkVariantLink
1482                             && $nt->getArticleID() == 0 ) {
1483                                 $wgContLang->findVariantLink($link, $nt);
1484                         }
1485
1486                         $ns = $nt->getNamespace();
1487                         $iw = $nt->getInterWiki();
1488
1489                         if ($might_be_img) { # if this is actually an invalid link
1490                                 if ($ns == NS_IMAGE && $noforce) { #but might be an image
1491                                         $found = false;
1492                                         while (isset ($a[$k+1]) ) {
1493                                                 #look at the next 'line' to see if we can close it there
1494                                                 $spliced = array_splice( $a, $k + 1, 1 );
1495                                                 $next_line = array_shift( $spliced );
1496                                                 if( preg_match("/^(.*?]].*?)]](.*)$/sD", $next_line, $m) ) {
1497                                                 # the first ]] closes the inner link, the second the image
1498                                                         $found = true;
1499                                                         $text .= '[[' . $m[1];
1500                                                         $trail = $m[2];
1501                                                         break;
1502                                                 } elseif( preg_match("/^.*?]].*$/sD", $next_line, $m) ) {
1503                                                         #if there's exactly one ]] that's fine, we'll keep looking
1504                                                         $text .= '[[' . $m[0];
1505                                                 } else {
1506                                                         #if $next_line is invalid too, we need look no further
1507                                                         $text .= '[[' . $next_line;
1508                                                         break;
1509                                                 }
1510                                         }
1511                                         if ( !$found ) {
1512                                                 # we couldn't find the end of this imageLink, so output it raw
1513                                                 #but don't ignore what might be perfectly normal links in the text we've examined
1514                                                 $text = $this->replaceInternalLinks($text);
1515                                                 $s .= $prefix . '[[' . $link . '|' . $text;
1516                                                 # note: no $trail, because without an end, there *is* no trail
1517                                                 continue;
1518                                         }
1519                                 } else { #it's not an image, so output it raw
1520                                         $s .= $prefix . '[[' . $link . '|' . $text;
1521                                         # note: no $trail, because without an end, there *is* no trail
1522                                         continue;
1523                                 }
1524                         }
1525
1526                         $wasblank = ( '' == $text );
1527                         if( $wasblank ) $text = $link;
1528
1529
1530                         # Link not escaped by : , create the various objects
1531                         if( $noforce ) {
1532
1533                                 # Interwikis
1534                                 if( $iw && $this->mOptions->getInterwikiMagic() && $nottalk && $wgContLang->getLanguageName( $iw ) ) {
1535                                         $this->mOutput->addLanguageLink( $nt->getFullText() );
1536                                         $s = rtrim($s . "\n");
1537                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1538                                         continue;
1539                                 }
1540
1541                                 if ( $ns == NS_IMAGE ) {
1542                                         wfProfileIn( "$fname-image" );
1543                                         if ( !wfIsBadImage( $nt->getDBkey() ) ) {
1544                                                 # recursively parse links inside the image caption
1545                                                 # actually, this will parse them in any other parameters, too,
1546                                                 # but it might be hard to fix that, and it doesn't matter ATM
1547                                                 $text = $this->replaceExternalLinks($text);
1548                                                 $text = $this->replaceInternalLinks($text);
1549
1550                                                 # cloak any absolute URLs inside the image markup, so replaceExternalLinks() won't touch them
1551                                                 $s .= $prefix . $this->armorLinks( $this->makeImage( $nt, $text ) ) . $trail;
1552                                                 $this->mOutput->addImage( $nt->getDBkey() );
1553
1554                                                 wfProfileOut( "$fname-image" );
1555                                                 continue;
1556                                         }
1557                                         wfProfileOut( "$fname-image" );
1558
1559                                 }
1560
1561                                 if ( $ns == NS_CATEGORY ) {
1562                                         wfProfileIn( "$fname-category" );
1563                                         $s = rtrim($s . "\n"); # bug 87
1564
1565                                         if ( $wasblank ) {
1566                                                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1567                                                         $sortkey = $this->mTitle->getText();
1568                                                 } else {
1569                                                         $sortkey = $this->mTitle->getPrefixedText();
1570                                                 }
1571                                         } else {
1572                                                 $sortkey = $text;
1573                                         }
1574                                         $sortkey = Sanitizer::decodeCharReferences( $sortkey );
1575                                         $sortkey = $wgContLang->convertCategoryKey( $sortkey );
1576                                         $this->mOutput->addCategory( $nt->getDBkey(), $sortkey );
1577
1578                                         /**
1579                                          * Strip the whitespace Category links produce, see bug 87
1580                                          * @todo We might want to use trim($tmp, "\n") here.
1581                                          */
1582                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1583
1584                                         wfProfileOut( "$fname-category" );
1585                                         continue;
1586                                 }
1587                         }
1588
1589                         if( ( $nt->getPrefixedText() === $selflink ) &&
1590                             ( $nt->getFragment() === '' ) ) {
1591                                 # Self-links are handled specially; generally de-link and change to bold.
1592                                 $s .= $prefix . $sk->makeSelfLinkObj( $nt, $text, '', $trail );
1593                                 continue;
1594                         }
1595
1596                         # Special and Media are pseudo-namespaces; no pages actually exist in them
1597                         if( $ns == NS_MEDIA ) {
1598                                 $link = $sk->makeMediaLinkObj( $nt, $text );
1599                                 # Cloak with NOPARSE to avoid replacement in replaceExternalLinks
1600                                 $s .= $prefix . $this->armorLinks( $link ) . $trail;
1601                                 $this->mOutput->addImage( $nt->getDBkey() );
1602                                 continue;
1603                         } elseif( $ns == NS_SPECIAL ) {
1604                                 $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1605                                 continue;
1606                         } elseif( $ns == NS_IMAGE ) {
1607                                 $img = Image::newFromTitle( $nt );
1608                                 if( $img->exists() ) {
1609                                         // Force a blue link if the file exists; may be a remote
1610                                         // upload on the shared repository, and we want to see its
1611                                         // auto-generated page.
1612                                         $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1613                                         continue;
1614                                 }
1615                         }
1616                         $s .= $this->makeLinkHolder( $nt, $text, '', $trail, $prefix );
1617                 }
1618                 wfProfileOut( $fname );
1619                 return $s;
1620         }
1621
1622         /**
1623          * Make a link placeholder. The text returned can be later resolved to a real link with
1624          * replaceLinkHolders(). This is done for two reasons: firstly to avoid further
1625          * parsing of interwiki links, and secondly to allow all extistence checks and
1626          * article length checks (for stub links) to be bundled into a single query.
1627          *
1628          */
1629         function makeLinkHolder( &$nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1630                 if ( ! is_object($nt) ) {
1631                         # Fail gracefully
1632                         $retVal = "<!-- ERROR -->{$prefix}{$text}{$trail}";
1633                 } else {
1634                         # Separate the link trail from the rest of the link
1635                         list( $inside, $trail ) = Linker::splitTrail( $trail );
1636
1637                         if ( $nt->isExternal() ) {
1638                                 $nr = array_push( $this->mInterwikiLinkHolders['texts'], $prefix.$text.$inside );
1639                                 $this->mInterwikiLinkHolders['titles'][] = $nt;
1640                                 $retVal = '<!--IWLINK '. ($nr-1) ."-->{$trail}";
1641                         } else {
1642                                 $nr = array_push( $this->mLinkHolders['namespaces'], $nt->getNamespace() );
1643                                 $this->mLinkHolders['dbkeys'][] = $nt->getDBkey();
1644                                 $this->mLinkHolders['queries'][] = $query;
1645                                 $this->mLinkHolders['texts'][] = $prefix.$text.$inside;
1646                                 $this->mLinkHolders['titles'][] = $nt;
1647
1648                                 $retVal = '<!--LINK '. ($nr-1) ."-->{$trail}";
1649                         }
1650                 }
1651                 return $retVal;
1652         }
1653
1654         /**
1655          * Render a forced-blue link inline; protect against double expansion of
1656          * URLs if we're in a mode that prepends full URL prefixes to internal links.
1657          * Since this little disaster has to split off the trail text to avoid
1658          * breaking URLs in the following text without breaking trails on the
1659          * wiki links, it's been made into a horrible function.
1660          *
1661          * @param Title $nt
1662          * @param string $text
1663          * @param string $query
1664          * @param string $trail
1665          * @param string $prefix
1666          * @return string HTML-wikitext mix oh yuck
1667          */
1668         function makeKnownLinkHolder( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1669                 list( $inside, $trail ) = Linker::splitTrail( $trail );
1670                 $sk =& $this->mOptions->getSkin();
1671                 $link = $sk->makeKnownLinkObj( $nt, $text, $query, $inside, $prefix );
1672                 return $this->armorLinks( $link ) . $trail;
1673         }
1674
1675         /**
1676          * Insert a NOPARSE hacky thing into any inline links in a chunk that's
1677          * going to go through further parsing steps before inline URL expansion.
1678          *
1679          * In particular this is important when using action=render, which causes
1680          * full URLs to be included.
1681          *
1682          * Oh man I hate our multi-layer parser!
1683          *
1684          * @param string more-or-less HTML
1685          * @return string less-or-more HTML with NOPARSE bits
1686          */
1687         function armorLinks( $text ) {
1688                 return preg_replace( "/\b(" . wfUrlProtocols() . ')/',
1689                         "{$this->mUniqPrefix}NOPARSE$1", $text );
1690         }
1691
1692         /**
1693          * Return true if subpage links should be expanded on this page.
1694          * @return bool
1695          */
1696         function areSubpagesAllowed() {
1697                 # Some namespaces don't allow subpages
1698                 global $wgNamespacesWithSubpages;
1699                 return !empty($wgNamespacesWithSubpages[$this->mTitle->getNamespace()]);
1700         }
1701
1702         /**
1703          * Handle link to subpage if necessary
1704          * @param string $target the source of the link
1705          * @param string &$text the link text, modified as necessary
1706          * @return string the full name of the link
1707          * @private
1708          */
1709         function maybeDoSubpageLink($target, &$text) {
1710                 # Valid link forms:
1711                 # Foobar -- normal
1712                 # :Foobar -- override special treatment of prefix (images, language links)
1713                 # /Foobar -- convert to CurrentPage/Foobar
1714                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1715                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1716                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1717
1718                 $fname = 'Parser::maybeDoSubpageLink';
1719                 wfProfileIn( $fname );
1720                 $ret = $target; # default return value is no change
1721
1722                 # Some namespaces don't allow subpages,
1723                 # so only perform processing if subpages are allowed
1724                 if( $this->areSubpagesAllowed() ) {
1725                         # Look at the first character
1726                         if( $target != '' && $target{0} == '/' ) {
1727                                 # / at end means we don't want the slash to be shown
1728                                 if( substr( $target, -1, 1 ) == '/' ) {
1729                                         $target = substr( $target, 1, -1 );
1730                                         $noslash = $target;
1731                                 } else {
1732                                         $noslash = substr( $target, 1 );
1733                                 }
1734
1735                                 $ret = $this->mTitle->getPrefixedText(). '/' . trim($noslash);
1736                                 if( '' === $text ) {
1737                                         $text = $target;
1738                                 } # this might be changed for ugliness reasons
1739                         } else {
1740                                 # check for .. subpage backlinks
1741                                 $dotdotcount = 0;
1742                                 $nodotdot = $target;
1743                                 while( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1744                                         ++$dotdotcount;
1745                                         $nodotdot = substr( $nodotdot, 3 );
1746                                 }
1747                                 if($dotdotcount > 0) {
1748                                         $exploded = explode( '/', $this->mTitle->GetPrefixedText() );
1749                                         if( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1750                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1751                                                 # / at the end means don't show full path
1752                                                 if( substr( $nodotdot, -1, 1 ) == '/' ) {
1753                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1754                                                         if( '' === $text ) {
1755                                                                 $text = $nodotdot;
1756                                                         }
1757                                                 }
1758                                                 $nodotdot = trim( $nodotdot );
1759                                                 if( $nodotdot != '' ) {
1760                                                         $ret .= '/' . $nodotdot;
1761                                                 }
1762                                         }
1763                                 }
1764                         }
1765                 }
1766
1767                 wfProfileOut( $fname );
1768                 return $ret;
1769         }
1770
1771         /**#@+
1772          * Used by doBlockLevels()
1773          * @private
1774          */
1775         /* private */ function closeParagraph() {
1776                 $result = '';
1777                 if ( '' != $this->mLastSection ) {
1778                         $result = '</' . $this->mLastSection  . ">\n";
1779                 }
1780                 $this->mInPre = false;
1781                 $this->mLastSection = '';
1782                 return $result;
1783         }
1784         # getCommon() returns the length of the longest common substring
1785         # of both arguments, starting at the beginning of both.
1786         #
1787         /* private */ function getCommon( $st1, $st2 ) {
1788                 $fl = strlen( $st1 );
1789                 $shorter = strlen( $st2 );
1790                 if ( $fl < $shorter ) { $shorter = $fl; }
1791
1792                 for ( $i = 0; $i < $shorter; ++$i ) {
1793                         if ( $st1{$i} != $st2{$i} ) { break; }
1794                 }
1795                 return $i;
1796         }
1797         # These next three functions open, continue, and close the list
1798         # element appropriate to the prefix character passed into them.
1799         #
1800         /* private */ function openList( $char ) {
1801                 $result = $this->closeParagraph();
1802
1803                 if ( '*' == $char ) { $result .= '<ul><li>'; }
1804                 else if ( '#' == $char ) { $result .= '<ol><li>'; }
1805                 else if ( ':' == $char ) { $result .= '<dl><dd>'; }
1806                 else if ( ';' == $char ) {
1807                         $result .= '<dl><dt>';
1808                         $this->mDTopen = true;
1809                 }
1810                 else { $result = '<!-- ERR 1 -->'; }
1811
1812                 return $result;
1813         }
1814
1815         /* private */ function nextItem( $char ) {
1816                 if ( '*' == $char || '#' == $char ) { return '</li><li>'; }
1817                 else if ( ':' == $char || ';' == $char ) {
1818                         $close = '</dd>';
1819                         if ( $this->mDTopen ) { $close = '</dt>'; }
1820                         if ( ';' == $char ) {
1821                                 $this->mDTopen = true;
1822                                 return $close . '<dt>';
1823                         } else {
1824                                 $this->mDTopen = false;
1825                                 return $close . '<dd>';
1826                         }
1827                 }
1828                 return '<!-- ERR 2 -->';
1829         }
1830
1831         /* private */ function closeList( $char ) {
1832                 if ( '*' == $char ) { $text = '</li></ul>'; }
1833                 else if ( '#' == $char ) { $text = '</li></ol>'; }
1834                 else if ( ':' == $char ) {
1835                         if ( $this->mDTopen ) {
1836                                 $this->mDTopen = false;
1837                                 $text = '</dt></dl>';
1838                         } else {
1839                                 $text = '</dd></dl>';
1840                         }
1841                 }
1842                 else {  return '<!-- ERR 3 -->'; }
1843                 return $text."\n";
1844         }
1845         /**#@-*/
1846
1847         /**
1848          * Make lists from lines starting with ':', '*', '#', etc.
1849          *
1850          * @private
1851          * @return string the lists rendered as HTML
1852          */
1853         function doBlockLevels( $text, $linestart ) {
1854                 $fname = 'Parser::doBlockLevels';
1855                 wfProfileIn( $fname );
1856
1857                 # Parsing through the text line by line.  The main thing
1858                 # happening here is handling of block-level elements p, pre,
1859                 # and making lists from lines starting with * # : etc.
1860                 #
1861                 $textLines = explode( "\n", $text );
1862
1863                 $lastPrefix = $output = '';
1864                 $this->mDTopen = $inBlockElem = false;
1865                 $prefixLength = 0;
1866                 $paragraphStack = false;
1867
1868                 if ( !$linestart ) {
1869                         $output .= array_shift( $textLines );
1870                 }
1871                 foreach ( $textLines as $oLine ) {
1872                         $lastPrefixLength = strlen( $lastPrefix );
1873                         $preCloseMatch = preg_match('/<\\/pre/i', $oLine );
1874                         $preOpenMatch = preg_match('/<pre/i', $oLine );
1875                         if ( !$this->mInPre ) {
1876                                 # Multiple prefixes may abut each other for nested lists.
1877                                 $prefixLength = strspn( $oLine, '*#:;' );
1878                                 $pref = substr( $oLine, 0, $prefixLength );
1879
1880                                 # eh?
1881                                 $pref2 = str_replace( ';', ':', $pref );
1882                                 $t = substr( $oLine, $prefixLength );
1883                                 $this->mInPre = !empty($preOpenMatch);
1884                         } else {
1885                                 # Don't interpret any other prefixes in preformatted text
1886                                 $prefixLength = 0;
1887                                 $pref = $pref2 = '';
1888                                 $t = $oLine;
1889                         }
1890
1891                         # List generation
1892                         if( $prefixLength && 0 == strcmp( $lastPrefix, $pref2 ) ) {
1893                                 # Same as the last item, so no need to deal with nesting or opening stuff
1894                                 $output .= $this->nextItem( substr( $pref, -1 ) );
1895                                 $paragraphStack = false;
1896
1897                                 if ( substr( $pref, -1 ) == ';') {
1898                                         # The one nasty exception: definition lists work like this:
1899                                         # ; title : definition text
1900                                         # So we check for : in the remainder text to split up the
1901                                         # title and definition, without b0rking links.
1902                                         $term = $t2 = '';
1903                                         if ($this->findColonNoLinks($t, $term, $t2) !== false) {
1904                                                 $t = $t2;
1905                                                 $output .= $term . $this->nextItem( ':' );
1906                                         }
1907                                 }
1908                         } elseif( $prefixLength || $lastPrefixLength ) {
1909                                 # Either open or close a level...
1910                                 $commonPrefixLength = $this->getCommon( $pref, $lastPrefix );
1911                                 $paragraphStack = false;
1912
1913                                 while( $commonPrefixLength < $lastPrefixLength ) {
1914                                         $output .= $this->closeList( $lastPrefix{$lastPrefixLength-1} );
1915                                         --$lastPrefixLength;
1916                                 }
1917                                 if ( $prefixLength <= $commonPrefixLength && $commonPrefixLength > 0 ) {
1918                                         $output .= $this->nextItem( $pref{$commonPrefixLength-1} );
1919                                 }
1920                                 while ( $prefixLength > $commonPrefixLength ) {
1921                                         $char = substr( $pref, $commonPrefixLength, 1 );
1922                                         $output .= $this->openList( $char );
1923
1924                                         if ( ';' == $char ) {
1925                                                 # FIXME: This is dupe of code above
1926                                                 if ($this->findColonNoLinks($t, $term, $t2) !== false) {
1927                                                         $t = $t2;
1928                                                         $output .= $term . $this->nextItem( ':' );
1929                                                 }
1930                                         }
1931                                         ++$commonPrefixLength;
1932                                 }
1933                                 $lastPrefix = $pref2;
1934                         }
1935                         if( 0 == $prefixLength ) {
1936                                 wfProfileIn( "$fname-paragraph" );
1937                                 # No prefix (not in list)--go to paragraph mode
1938                                 // XXX: use a stack for nestable elements like span, table and div
1939                                 $openmatch = preg_match('/(<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<pre|<tr|<p|<ul|<li|<\\/tr|<\\/td|<\\/th)/iS', $t );
1940                                 $closematch = preg_match(
1941                                         '/(<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6|'.
1942                                         '<td|<th|<div|<\\/div|<hr|<\\/pre|<\\/p|'.$this->mUniqPrefix.'-pre|<\\/li|<\\/ul)/iS', $t );
1943                                 if ( $openmatch or $closematch ) {
1944                                         $paragraphStack = false;
1945                                         # TODO bug 5718: paragraph closed
1946                                         $output .= $this->closeParagraph();
1947                                         if ( $preOpenMatch and !$preCloseMatch ) {
1948                                                 $this->mInPre = true;
1949                                         }
1950                                         if ( $closematch ) {
1951                                                 $inBlockElem = false;
1952                                         } else {
1953                                                 $inBlockElem = true;
1954                                         }
1955                                 } else if ( !$inBlockElem && !$this->mInPre ) {
1956                                         if ( ' ' == $t{0} and ( $this->mLastSection == 'pre' or trim($t) != '' ) ) {
1957                                                 // pre
1958                                                 if ($this->mLastSection != 'pre') {
1959                                                         $paragraphStack = false;
1960                                                         $output .= $this->closeParagraph().'<pre>';
1961                                                         $this->mLastSection = 'pre';
1962                                                 }
1963                                                 $t = substr( $t, 1 );
1964                                         } else {
1965                                                 // paragraph
1966                                                 if ( '' == trim($t) ) {
1967                                                         if ( $paragraphStack ) {
1968                                                                 $output .= $paragraphStack.'<br />';
1969                                                                 $paragraphStack = false;
1970                                                                 $this->mLastSection = 'p';
1971                                                         } else {
1972                                                                 if ($this->mLastSection != 'p' ) {
1973                                                                         $output .= $this->closeParagraph();
1974                                                                         $this->mLastSection = '';
1975                                                                         $paragraphStack = '<p>';
1976                                                                 } else {
1977                                                                         $paragraphStack = '</p><p>';
1978                                                                 }
1979                                                         }
1980                                                 } else {
1981                                                         if ( $paragraphStack ) {
1982                                                                 $output .= $paragraphStack;
1983                                                                 $paragraphStack = false;
1984                                                                 $this->mLastSection = 'p';
1985                                                         } else if ($this->mLastSection != 'p') {
1986                                                                 $output .= $this->closeParagraph().'<p>';
1987                                                                 $this->mLastSection = 'p';
1988                                                         }
1989                                                 }
1990                                         }
1991                                 }
1992                                 wfProfileOut( "$fname-paragraph" );
1993                         }
1994                         // somewhere above we forget to get out of pre block (bug 785)
1995                         if($preCloseMatch && $this->mInPre) {
1996                                 $this->mInPre = false;
1997                         }
1998                         if ($paragraphStack === false) {
1999                                 $output .= $t."\n";
2000                         }
2001                 }
2002                 while ( $prefixLength ) {
2003                         $output .= $this->closeList( $pref2{$prefixLength-1} );
2004                         --$prefixLength;
2005                 }
2006                 if ( '' != $this->mLastSection ) {
2007                         $output .= '</' . $this->mLastSection . '>';
2008                         $this->mLastSection = '';
2009                 }
2010
2011                 wfProfileOut( $fname );
2012                 return $output;
2013         }
2014
2015         /**
2016          * Split up a string on ':', ignoring any occurences inside
2017          * <a>..</a> or <span>...</span>
2018          * @param string $str the string to split
2019          * @param string &$before set to everything before the ':'
2020          * @param string &$after set to everything after the ':'
2021          * return string the position of the ':', or false if none found
2022          */
2023         function findColonNoLinks($str, &$before, &$after) {
2024                 # I wonder if we should make this count all tags, not just <a>
2025                 # and <span>. That would prevent us from matching a ':' that
2026                 # comes in the middle of italics other such formatting....
2027                 # -- Wil
2028                 $fname = 'Parser::findColonNoLinks';
2029                 wfProfileIn( $fname );
2030                 $pos = 0;
2031                 do {
2032                         $colon = strpos($str, ':', $pos);
2033
2034                         if ($colon !== false) {
2035                                 $before = substr($str, 0, $colon);
2036                                 $after = substr($str, $colon + 1);
2037
2038                                 # Skip any ':' within <a> or <span> pairs
2039                                 $a = substr_count($before, '<a');
2040                                 $s = substr_count($before, '<span');
2041                                 $ca = substr_count($before, '</a>');
2042                                 $cs = substr_count($before, '</span>');
2043
2044                                 if ($a <= $ca and $s <= $cs) {
2045                                         # Tags are balanced before ':'; ok
2046                                         break;
2047                                 }
2048                                 $pos = $colon + 1;
2049                         }
2050                 } while ($colon !== false);
2051                 wfProfileOut( $fname );
2052                 return $colon;
2053         }
2054
2055         /**
2056          * Return value of a magic variable (like PAGENAME)
2057          *
2058          * @private
2059          */
2060         function getVariableValue( $index ) {
2061                 global $wgContLang, $wgSitename, $wgServer, $wgServerName, $wgScriptPath;
2062
2063                 /**
2064                  * Some of these require message or data lookups and can be
2065                  * expensive to check many times.
2066                  */
2067                 static $varCache = array();
2068                 if ( wfRunHooks( 'ParserGetVariableValueVarCache', array( &$this, &$varCache ) ) )
2069                         if ( isset( $varCache[$index] ) )
2070                                 return $varCache[$index];
2071
2072                 $ts = time();
2073                 wfRunHooks( 'ParserGetVariableValueTs', array( &$this, &$ts ) );
2074
2075                 switch ( $index ) {
2076                         case MAG_CURRENTMONTH:
2077                                 return $varCache[$index] = $wgContLang->formatNum( date( 'm', $ts ) );
2078                         case MAG_CURRENTMONTHNAME:
2079                                 return $varCache[$index] = $wgContLang->getMonthName( date( 'n', $ts ) );
2080                         case MAG_CURRENTMONTHNAMEGEN:
2081                                 return $varCache[$index] = $wgContLang->getMonthNameGen( date( 'n', $ts ) );
2082                         case MAG_CURRENTMONTHABBREV:
2083                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( date( 'n', $ts ) );
2084                         case MAG_CURRENTDAY:
2085                                 return $varCache[$index] = $wgContLang->formatNum( date( 'j', $ts ) );
2086                         case MAG_CURRENTDAY2:
2087                                 return $varCache[$index] = $wgContLang->formatNum( date( 'd', $ts ) );
2088                         case MAG_PAGENAME:
2089                                 return $this->mTitle->getText();
2090                         case MAG_PAGENAMEE:
2091                                 return $this->mTitle->getPartialURL();
2092                         case MAG_FULLPAGENAME:
2093                                 return $this->mTitle->getPrefixedText();
2094                         case MAG_FULLPAGENAMEE:
2095                                 return $this->mTitle->getPrefixedURL();
2096                         case MAG_SUBPAGENAME:
2097                                 return $this->mTitle->getSubpageText();
2098                         case MAG_SUBPAGENAMEE:
2099                                 return $this->mTitle->getSubpageUrlForm();
2100                         case MAG_BASEPAGENAME:
2101                                 return $this->mTitle->getBaseText();
2102                         case MAG_BASEPAGENAMEE:
2103                                 return wfUrlEncode( str_replace( ' ', '_', $this->mTitle->getBaseText() ) );
2104                         case MAG_TALKPAGENAME:
2105                                 if( $this->mTitle->canTalk() ) {
2106                                         $talkPage = $this->mTitle->getTalkPage();
2107                                         return $talkPage->getPrefixedText();
2108                                 } else {
2109                                         return '';
2110                                 }
2111                         case MAG_TALKPAGENAMEE:
2112                                 if( $this->mTitle->canTalk() ) {
2113                                         $talkPage = $this->mTitle->getTalkPage();
2114                                         return $talkPage->getPrefixedUrl();
2115                                 } else {
2116                                         return '';
2117                                 }
2118                         case MAG_SUBJECTPAGENAME:
2119                                 $subjPage = $this->mTitle->getSubjectPage();
2120                                 return $subjPage->getPrefixedText();
2121                         case MAG_SUBJECTPAGENAMEE:
2122                                 $subjPage = $this->mTitle->getSubjectPage();
2123                                 return $subjPage->getPrefixedUrl();
2124                         case MAG_REVISIONID:
2125                                 return $this->mRevisionId;
2126                         case MAG_NAMESPACE:
2127                                 return str_replace('_',' ',$wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2128                         case MAG_NAMESPACEE:
2129                                 return wfUrlencode( $wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2130                         case MAG_TALKSPACE:
2131                                 return $this->mTitle->canTalk() ? str_replace('_',' ',$this->mTitle->getTalkNsText()) : '';
2132                         case MAG_TALKSPACEE:
2133                                 return $this->mTitle->canTalk() ? wfUrlencode( $this->mTitle->getTalkNsText() ) : '';
2134                         case MAG_SUBJECTSPACE:
2135                                 return $this->mTitle->getSubjectNsText();
2136                         case MAG_SUBJECTSPACEE:
2137                                 return( wfUrlencode( $this->mTitle->getSubjectNsText() ) );
2138                         case MAG_CURRENTDAYNAME:
2139                                 return $varCache[$index] = $wgContLang->getWeekdayName( date( 'w', $ts ) + 1 );
2140                         case MAG_CURRENTYEAR:
2141                                 return $varCache[$index] = $wgContLang->formatNum( date( 'Y', $ts ), true );
2142                         case MAG_CURRENTTIME:
2143                                 return $varCache[$index] = $wgContLang->time( wfTimestamp( TS_MW, $ts ), false, false );
2144                         case MAG_CURRENTWEEK:
2145                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2146                                 // int to remove the padding
2147                                 return $varCache[$index] = $wgContLang->formatNum( (int)date( 'W', $ts ) );
2148                         case MAG_CURRENTDOW:
2149                                 return $varCache[$index] = $wgContLang->formatNum( date( 'w', $ts ) );
2150                         case MAG_NUMBEROFARTICLES:
2151                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfArticles() );
2152                         case MAG_NUMBEROFFILES:
2153                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfFiles() );
2154                         case MAG_NUMBEROFUSERS:
2155                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfUsers() );
2156                         case MAG_NUMBEROFPAGES:
2157                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfPages() );
2158                         case MAG_CURRENTTIMESTAMP:
2159                                 return $varCache[$index] = wfTimestampNow();
2160                         case MAG_CURRENTVERSION:
2161                                 global $wgVersion;
2162                                 return $wgVersion;
2163                         case MAG_SITENAME:
2164                                 return $wgSitename;
2165                         case MAG_SERVER:
2166                                 return $wgServer;
2167                         case MAG_SERVERNAME:
2168                                 return $wgServerName;
2169                         case MAG_SCRIPTPATH:
2170                                 return $wgScriptPath;
2171                         case MAG_DIRECTIONMARK:
2172                                 return $wgContLang->getDirMark();
2173                         default:
2174                                 $ret = null;
2175                                 if ( wfRunHooks( 'ParserGetVariableValueSwitch', array( &$this, &$varCache, &$index, &$ret ) ) )
2176                                         return $ret;
2177                                 else
2178                                         return null;
2179                 }
2180         }
2181
2182         /**
2183          * initialise the magic variables (like CURRENTMONTHNAME)
2184          *
2185          * @private
2186          */
2187         function initialiseVariables() {
2188                 $fname = 'Parser::initialiseVariables';
2189                 wfProfileIn( $fname );
2190                 global $wgVariableIDs;
2191                 $this->mVariables = array();
2192                 foreach ( $wgVariableIDs as $id ) {
2193                         $mw =& MagicWord::get( $id );
2194                         $mw->addToArray( $this->mVariables, $id );
2195                 }
2196                 wfProfileOut( $fname );
2197         }
2198
2199         /**
2200          * parse any parentheses in format ((title|part|part))
2201          * and call callbacks to get a replacement text for any found piece
2202          *
2203          * @param string $text The text to parse
2204          * @param array $callbacks rules in form:
2205          *     '{' => array(                            # opening parentheses
2206          *                                      'end' => '}',   # closing parentheses
2207          *                                      'cb' => array(2 => callback,    # replacement callback to call if {{..}} is found
2208          *                                                                4 => callback         # replacement callback to call if {{{{..}}}} is found
2209          *                                                                )
2210          *                                      )
2211          * @private
2212          */
2213         function replace_callback ($text, $callbacks) {
2214                 $openingBraceStack = array();   # this array will hold a stack of parentheses which are not closed yet
2215                 $lastOpeningBrace = -1;                 # last not closed parentheses
2216
2217                 for ($i = 0; $i < strlen($text); $i++) {
2218                         # check for any opening brace
2219                         $rule = null;
2220                         $nextPos = -1;
2221                         foreach ($callbacks as $key => $value) {
2222                                 $pos = strpos ($text, $key, $i);
2223                                 if (false !== $pos && (-1 == $nextPos || $pos < $nextPos)) {
2224                                         $rule = $value;
2225                                         $nextPos = $pos;
2226                                 }
2227                         }
2228
2229                         if ($lastOpeningBrace >= 0) {
2230                                 $pos = strpos ($text, $openingBraceStack[$lastOpeningBrace]['braceEnd'], $i);
2231
2232                                 if (false !== $pos && (-1 == $nextPos || $pos < $nextPos)){
2233                                         $rule = null;
2234                                         $nextPos = $pos;
2235                                 }
2236
2237                                 $pos = strpos ($text, '|', $i);
2238
2239                                 if (false !== $pos && (-1 == $nextPos || $pos < $nextPos)){
2240                                         $rule = null;
2241                                         $nextPos = $pos;
2242                                 }
2243                         }
2244
2245                         if ($nextPos == -1)
2246                                 break;
2247
2248                         $i = $nextPos;
2249
2250                         # found openning brace, lets add it to parentheses stack
2251                         if (null != $rule) {
2252                                 $piece = array('brace' => $text[$i],
2253                                                            'braceEnd' => $rule['end'],
2254                                                            'count' => 1,
2255                                                            'title' => '',
2256                                                            'parts' => null);
2257
2258                                 # count openning brace characters
2259                                 while ($i+1 < strlen($text) && $text[$i+1] == $piece['brace']) {
2260                                         $piece['count']++;
2261                                         $i++;
2262                                 }
2263
2264                                 $piece['startAt'] = $i+1;
2265                                 $piece['partStart'] = $i+1;
2266
2267                                 # we need to add to stack only if openning brace count is enough for any given rule
2268                                 foreach ($rule['cb'] as $cnt => $fn) {
2269                                         if ($piece['count'] >= $cnt) {
2270                                                 $lastOpeningBrace ++;
2271                                                 $openingBraceStack[$lastOpeningBrace] = $piece;
2272                                                 break;
2273                                         }
2274                                 }
2275
2276                                 continue;
2277                         }
2278                         else if ($lastOpeningBrace >= 0) {
2279                                 # first check if it is a closing brace
2280                                 if ($openingBraceStack[$lastOpeningBrace]['braceEnd'] == $text[$i]) {
2281                                         # lets check if it is enough characters for closing brace
2282                                         $count = 1;
2283                                         while ($i+$count < strlen($text) && $text[$i+$count] == $text[$i])
2284                                                 $count++;
2285
2286                                         # if there are more closing parentheses than opening ones, we parse less
2287                                         if ($openingBraceStack[$lastOpeningBrace]['count'] < $count)
2288                                                 $count = $openingBraceStack[$lastOpeningBrace]['count'];
2289
2290                                         # check for maximum matching characters (if there are 5 closing characters, we will probably need only 3 - depending on the rules)
2291                                         $matchingCount = 0;
2292                                         $matchingCallback = null;
2293                                         foreach ($callbacks[$openingBraceStack[$lastOpeningBrace]['brace']]['cb'] as $cnt => $fn) {
2294                                                 if ($count >= $cnt && $matchingCount < $cnt) {
2295                                                         $matchingCount = $cnt;
2296                                                         $matchingCallback = $fn;
2297                                                 }
2298                                         }
2299
2300                                         if ($matchingCount == 0) {
2301                                                 $i += $count - 1;
2302                                                 continue;
2303                                         }
2304
2305                                         # lets set a title or last part (if '|' was found)
2306                                         if (null === $openingBraceStack[$lastOpeningBrace]['parts'])
2307                                                 $openingBraceStack[$lastOpeningBrace]['title'] = substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'], $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2308                                         else
2309                                                 $openingBraceStack[$lastOpeningBrace]['parts'][] = substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'], $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2310
2311                                         $pieceStart = $openingBraceStack[$lastOpeningBrace]['startAt'] - $matchingCount;
2312                                         $pieceEnd = $i + $matchingCount;
2313
2314                                         if( is_callable( $matchingCallback ) ) {
2315                                                 $cbArgs = array (
2316                                                                                  'text' => substr($text, $pieceStart, $pieceEnd - $pieceStart),
2317                                                                                  'title' => trim($openingBraceStack[$lastOpeningBrace]['title']),
2318                                                                                  'parts' => $openingBraceStack[$lastOpeningBrace]['parts'],
2319                                                                                  'lineStart' => (($pieceStart > 0) && ($text[$pieceStart-1] == '\n')),
2320                                                                                  );
2321                                                 # finally we can call a user callback and replace piece of text
2322                                                 $replaceWith = call_user_func( $matchingCallback, $cbArgs );
2323                                                 $text = substr($text, 0, $pieceStart) . $replaceWith . substr($text, $pieceEnd);
2324                                                 $i = $pieceStart + strlen($replaceWith) - 1;
2325                                         }
2326                                         else {
2327                                                 # null value for callback means that parentheses should be parsed, but not replaced
2328                                                 $i += $matchingCount - 1;
2329                                         }
2330
2331                                         # reset last openning parentheses, but keep it in case there are unused characters
2332                                         $piece = array('brace' => $openingBraceStack[$lastOpeningBrace]['brace'],
2333                                                                    'braceEnd' => $openingBraceStack[$lastOpeningBrace]['braceEnd'],
2334                                                                    'count' => $openingBraceStack[$lastOpeningBrace]['count'],
2335                                                                    'title' => '',
2336                                                                    'parts' => null,
2337                                                                    'startAt' => $openingBraceStack[$lastOpeningBrace]['startAt']);
2338                                         $openingBraceStack[$lastOpeningBrace--] = null;
2339
2340                                         if ($matchingCount < $piece['count']) {
2341                                                 $piece['count'] -= $matchingCount;
2342                                                 $piece['startAt'] -= $matchingCount;
2343                                                 $piece['partStart'] = $piece['startAt'];
2344                                                 # do we still qualify for any callback with remaining count?
2345                                                 foreach ($callbacks[$piece['brace']]['cb'] as $cnt => $fn) {
2346                                                         if ($piece['count'] >= $cnt) {
2347                                                                 $lastOpeningBrace ++;
2348                                                                 $openingBraceStack[$lastOpeningBrace] = $piece;
2349                                                                 break;
2350                                                         }
2351                                                 }
2352                                         }
2353                                         continue;
2354                                 }
2355
2356                                 # lets set a title if it is a first separator, or next part otherwise
2357                                 if ($text[$i] == '|') {
2358                                         if (null === $openingBraceStack[$lastOpeningBrace]['parts']) {
2359                                                 $openingBraceStack[$lastOpeningBrace]['title'] = substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'], $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2360                                                 $openingBraceStack[$lastOpeningBrace]['parts'] = array();
2361                                         }
2362                                         else
2363                                                 $openingBraceStack[$lastOpeningBrace]['parts'][] = substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'], $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2364
2365                                         $openingBraceStack[$lastOpeningBrace]['partStart'] = $i + 1;
2366                                 }
2367                         }
2368                 }
2369
2370                 return $text;
2371         }
2372
2373         /**
2374          * Replace magic variables, templates, and template arguments
2375          * with the appropriate text. Templates are substituted recursively,
2376          * taking care to avoid infinite loops.
2377          *
2378          * Note that the substitution depends on value of $mOutputType:
2379          *  OT_WIKI: only {{subst:}} templates
2380          *  OT_MSG: only magic variables
2381          *  OT_HTML: all templates and magic variables
2382          *
2383          * @param string $tex The text to transform
2384          * @param array $args Key-value pairs representing template parameters to substitute
2385          * @param bool $argsOnly Only do argument (triple-brace) expansion, not double-brace expansion
2386          * @private
2387          */
2388         function replaceVariables( $text, $args = array(), $argsOnly = false ) {
2389                 # Prevent too big inclusions
2390                 if( strlen( $text ) > MAX_INCLUDE_SIZE ) {
2391                         return $text;
2392                 }
2393
2394                 $fname = 'Parser::replaceVariables';
2395                 wfProfileIn( $fname );
2396
2397                 # This function is called recursively. To keep track of arguments we need a stack:
2398                 array_push( $this->mArgStack, $args );
2399
2400                 $braceCallbacks = array();
2401                 if ( !$argsOnly ) {
2402                         $braceCallbacks[2] = array( &$this, 'braceSubstitution' );
2403                 }
2404                 if ( $this->mOutputType == OT_HTML || $this->mOutputType == OT_WIKI ) {
2405                         $braceCallbacks[3] = array( &$this, 'argSubstitution' );
2406                 }
2407                 $callbacks = array();
2408                 $callbacks['{'] = array('end' => '}', 'cb' => $braceCallbacks);
2409                 $callbacks['['] = array('end' => ']', 'cb' => array(2=>null));
2410                 $text = $this->replace_callback ($text, $callbacks);
2411
2412                 array_pop( $this->mArgStack );
2413
2414                 wfProfileOut( $fname );
2415                 return $text;
2416         }
2417
2418         /**
2419          * Replace magic variables
2420          * @private
2421          */
2422         function variableSubstitution( $matches ) {
2423                 $fname = 'Parser::variableSubstitution';
2424                 $varname = $matches[1];
2425                 wfProfileIn( $fname );
2426                 if ( !$this->mVariables ) {
2427                         $this->initialiseVariables();
2428                 }
2429                 $skip = false;
2430                 if ( $this->mOutputType == OT_WIKI ) {
2431                         # Do only magic variables prefixed by SUBST
2432                         $mwSubst =& MagicWord::get( MAG_SUBST );
2433                         if (!$mwSubst->matchStartAndRemove( $varname ))
2434                                 $skip = true;
2435                         # Note that if we don't substitute the variable below,
2436                         # we don't remove the {{subst:}} magic word, in case
2437                         # it is a template rather than a magic variable.
2438                 }
2439                 if ( !$skip && array_key_exists( $varname, $this->mVariables ) ) {
2440                         $id = $this->mVariables[$varname];
2441                         $text = $this->getVariableValue( $id );
2442                         $this->mOutput->mContainsOldMagic = true;
2443                 } else {
2444                         $text = $matches[0];
2445                 }
2446                 wfProfileOut( $fname );
2447                 return $text;
2448         }
2449
2450         # Split template arguments
2451         function getTemplateArgs( $argsString ) {
2452                 if ( $argsString === '' ) {
2453                         return array();
2454                 }
2455
2456                 $args = explode( '|', substr( $argsString, 1 ) );
2457
2458                 # If any of the arguments contains a '[[' but no ']]', it needs to be
2459                 # merged with the next arg because the '|' character between belongs
2460                 # to the link syntax and not the template parameter syntax.
2461                 $argc = count($args);
2462
2463                 for ( $i = 0; $i < $argc-1; $i++ ) {
2464                         if ( substr_count ( $args[$i], '[[' ) != substr_count ( $args[$i], ']]' ) ) {
2465                                 $args[$i] .= '|'.$args[$i+1];
2466                                 array_splice($args, $i+1, 1);
2467                                 $i--;
2468                                 $argc--;
2469                         }
2470                 }
2471
2472                 return $args;
2473         }
2474
2475         /**
2476          * Return the text of a template, after recursively
2477          * replacing any variables or templates within the template.
2478          *
2479          * @param array $piece The parts of the template
2480          *  $piece['text']: matched text
2481          *  $piece['title']: the title, i.e. the part before the |
2482          *  $piece['parts']: the parameter array
2483          * @return string the text of the template
2484          * @private
2485          */
2486         function braceSubstitution( $piece ) {
2487                 global $wgContLang, $wgLang, $wgAllowDisplayTitle, $action;
2488                 $fname = 'Parser::braceSubstitution';
2489                 wfProfileIn( $fname );
2490
2491                 # Flags
2492                 $found = false;             # $text has been filled
2493                 $nowiki = false;            # wiki markup in $text should be escaped
2494                 $noparse = false;           # Unsafe HTML tags should not be stripped, etc.
2495                 $noargs = false;            # Don't replace triple-brace arguments in $text
2496                 $replaceHeadings = false;   # Make the edit section links go to the template not the article
2497                 $isHTML = false;            # $text is HTML, armour it against wikitext transformation
2498                 $forceRawInterwiki = false; # Force interwiki transclusion to be done in raw mode not rendered
2499
2500                 # Title object, where $text came from
2501                 $title = NULL;
2502
2503                 $linestart = '';
2504
2505                 # $part1 is the bit before the first |, and must contain only title characters
2506                 # $args is a list of arguments, starting from index 0, not including $part1
2507
2508                 $part1 = $piece['title'];
2509                 # If the third subpattern matched anything, it will start with |
2510
2511                 if (null == $piece['parts']) {
2512                         $replaceWith = $this->variableSubstitution (array ($piece['text'], $piece['title']));
2513                         if ($replaceWith != $piece['text']) {
2514                                 $text = $replaceWith;
2515                                 $found = true;
2516                                 $noparse = true;
2517                                 $noargs = true;
2518                         }
2519                 }
2520
2521                 $args = (null == $piece['parts']) ? array() : $piece['parts'];
2522                 $argc = count( $args );
2523
2524                 # SUBST
2525                 if ( !$found ) {
2526                         $mwSubst =& MagicWord::get( MAG_SUBST );
2527                         if ( $mwSubst->matchStartAndRemove( $part1 ) xor ($this->mOutputType == OT_WIKI) ) {
2528                                 # One of two possibilities is true:
2529                                 # 1) Found SUBST but not in the PST phase
2530                                 # 2) Didn't find SUBST and in the PST phase
2531                                 # In either case, return without further processing
2532                                 $text = $piece['text'];
2533                                 $found = true;
2534                                 $noparse = true;
2535                                 $noargs = true;
2536                         }
2537                 }
2538
2539                 # MSG, MSGNW, INT and RAW
2540                 if ( !$found ) {
2541                         # Check for MSGNW:
2542                         $mwMsgnw =& MagicWord::get( MAG_MSGNW );
2543                         if ( $mwMsgnw->matchStartAndRemove( $part1 ) ) {
2544                                 $nowiki = true;
2545                         } else {
2546                                 # Remove obsolete MSG:
2547                                 $mwMsg =& MagicWord::get( MAG_MSG );
2548                                 $mwMsg->matchStartAndRemove( $part1 );
2549                         }
2550
2551                         # Check for RAW:
2552                         $mwRaw =& MagicWord::get( MAG_RAW );
2553                         if ( $mwRaw->matchStartAndRemove( $part1 ) ) {
2554                                 $forceRawInterwiki = true;
2555                         }
2556
2557                         # Check if it is an internal message
2558                         $mwInt =& MagicWord::get( MAG_INT );
2559                         if ( $mwInt->matchStartAndRemove( $part1 ) ) {
2560                                 if ( $this->incrementIncludeCount( 'int:'.$part1 ) ) {
2561                                         $text = $linestart . wfMsgReal( $part1, $args, true );
2562                                         $found = true;
2563                                 }
2564                         }
2565                 }
2566
2567                 # NS
2568                 if ( !$found ) {
2569                         # Check for NS: (namespace expansion)
2570                         $mwNs = MagicWord::get( MAG_NS );
2571                         if ( $mwNs->matchStartAndRemove( $part1 ) ) {
2572                                 if ( intval( $part1 ) || $part1 == "0" ) {
2573                                         $text = $linestart . $wgContLang->getNsText( intval( $part1 ) );
2574                                         $found = true;
2575                                 } else {
2576                                         $index = Namespace::getCanonicalIndex( strtolower( $part1 ) );
2577                                         if ( !is_null( $index ) ) {
2578                                                 $text = $linestart . $wgContLang->getNsText( $index );
2579                                                 $found = true;
2580                                         }
2581                                 }
2582                         }
2583                 }
2584
2585                 # URLENCODE
2586                 if( !$found ) {
2587                         $urlencode =& MagicWord::get( MAG_URLENCODE );
2588                         if( $urlencode->matchStartAndRemove( $part1 ) ) {
2589                                 $text = $linestart . urlencode( $part1 );
2590                                 $found = true;
2591                         }
2592                 }
2593
2594                 # LCFIRST, UCFIRST, LC and UC
2595                 if ( !$found ) {
2596                         $lcfirst =& MagicWord::get( MAG_LCFIRST );
2597                         $ucfirst =& MagicWord::get( MAG_UCFIRST );
2598                         $lc =& MagicWord::get( MAG_LC );
2599                         $uc =& MagicWord::get( MAG_UC );
2600                         if ( $lcfirst->matchStartAndRemove( $part1 ) ) {
2601                                 $text = $linestart . $wgContLang->lcfirst( $part1 );
2602                                 $found = true;
2603                         } else if ( $ucfirst->matchStartAndRemove( $part1 ) ) {
2604                                 $text = $linestart . $wgContLang->ucfirst( $part1 );
2605                                 $found = true;
2606                         } else if ( $lc->matchStartAndRemove( $part1 ) ) {
2607                                 $text = $linestart . $wgContLang->lc( $part1 );
2608                                 $found = true;
2609                         } else if ( $uc->matchStartAndRemove( $part1 ) ) {
2610                                  $text = $linestart . $wgContLang->uc( $part1 );
2611                                  $found = true;
2612                         }
2613                 }
2614
2615                 # LOCALURL and FULLURL
2616                 if ( !$found ) {
2617                         $mwLocal =& MagicWord::get( MAG_LOCALURL );
2618                         $mwLocalE =& MagicWord::get( MAG_LOCALURLE );
2619                         $mwFull =& MagicWord::get( MAG_FULLURL );
2620                         $mwFullE =& MagicWord::get( MAG_FULLURLE );
2621
2622
2623                         if ( $mwLocal->matchStartAndRemove( $part1 ) ) {
2624                                 $func = 'getLocalURL';
2625                         } elseif ( $mwLocalE->matchStartAndRemove( $part1 ) ) {
2626                                 $func = 'escapeLocalURL';
2627                         } elseif ( $mwFull->matchStartAndRemove( $part1 ) ) {
2628                                 $func = 'getFullURL';
2629                         } elseif ( $mwFullE->matchStartAndRemove( $part1 ) ) {
2630                                 $func = 'escapeFullURL';
2631                         } else {
2632                                 $func = false;
2633                         }
2634
2635                         if ( $func !== false ) {
2636                                 $title = Title::newFromText( $part1 );
2637                                 # Due to order of execution of a lot of bits, the values might be encoded
2638                                 # before arriving here; if that's true, then the title can't be created
2639                                 # and the variable will fail. If we can't get a decent title from the first
2640                                 # attempt, url-decode and try for a second.
2641                                 if( is_null( $title ) )
2642                                         $title = Title::newFromUrl( urldecode( $part1 ) );
2643                                 if ( !is_null( $title ) ) {
2644                                         if ( $argc > 0 ) {
2645                                                 $text = $linestart . $title->$func( $args[0] );
2646                                         } else {
2647                                                 $text = $linestart . $title->$func();
2648                                         }
2649                                         $found = true;
2650                                 }
2651                         }
2652                 }
2653
2654                 $lang = $this->mOptions->getInterfaceMessage() ? $wgLang : $wgContLang;
2655                 # GRAMMAR
2656                 if ( !$found && $argc == 1 ) {
2657                         $mwGrammar =& MagicWord::get( MAG_GRAMMAR );
2658                         if ( $mwGrammar->matchStartAndRemove( $part1 ) ) {
2659                                 $text = $linestart . $lang->convertGrammar( $args[0], $part1 );
2660                                 $found = true;
2661                         }
2662                 }
2663
2664                 # PLURAL
2665                 if ( !$found && $argc >= 2 ) {
2666                         $mwPluralForm =& MagicWord::get( MAG_PLURAL );
2667                         if ( $mwPluralForm->matchStartAndRemove( $part1 ) ) {
2668                                 if ($argc==2) {$args[2]=$args[1];}
2669                                 $text = $linestart . $lang->convertPlural( $part1, $args[0], $args[1], $args[2]);
2670                                 $found = true;
2671                         }
2672                 }
2673
2674                 # DISPLAYTITLE
2675                 if ( !$found && $argc == 1 && $wgAllowDisplayTitle ) {
2676                         $mwDT =& MagicWord::get( MAG_DISPLAYTITLE );
2677                         if ( $mwDT->matchStartAndRemove( $part1 ) ) {
2678
2679                                 # Set title in parser output object
2680                                 $param = $args[0];
2681                                 $parserOptions = new ParserOptions;
2682                                 $local_parser = new Parser ();
2683                                 $t2 = $local_parser->parse ( $param, $this->mTitle, $parserOptions, false );
2684                                 $this->mOutput->mHTMLtitle = $t2->GetText();
2685
2686                                 # Add subtitle
2687                                 $t = $this->mTitle->getPrefixedText();
2688                                 $this->mOutput->mSubtitle .= wfMsg('displaytitle', $t);
2689                                 $text = "" ;
2690                                 $found = true ;
2691                         }
2692                 }
2693
2694                 # NUMBEROFPAGES, NUMBEROFUSERS, NUMBEROFARTICLES, and NUMBEROFFILES
2695                 if( !$found ) {
2696                         $mwWordsToCheck = array( MAG_NUMBEROFPAGES => 'wfNumberOfPages',
2697                                                                          MAG_NUMBEROFUSERS => 'wfNumberOfUsers',
2698                                                                          MAG_NUMBEROFARTICLES => 'wfNumberOfArticles',
2699                                                                          MAG_NUMBEROFFILES => 'wfNumberOfFiles' );
2700                         foreach( $mwWordsToCheck as $word => $func ) {
2701                                 $mwCurrentWord =& MagicWord::get( $word );
2702                                 if( $mwCurrentWord->matchStartAndRemove( $part1 ) ) {
2703                                         $mwRawSuffix =& MagicWord::get( MAG_RAWSUFFIX );
2704                                         if( $mwRawSuffix->match( $args[0] ) ) {
2705                                                 # Raw and unformatted
2706                                                 $text = $linestart . call_user_func( $func );
2707                                         } else {
2708                                                 # Formatted according to the content default
2709                                                 $text = $linestart . $wgContLang->formatNum( call_user_func( $func ) );
2710                                         }
2711                                         $found = true;
2712                                 }
2713                         }
2714                 }
2715
2716                 # Extensions
2717                 if ( !$found && substr( $part1, 0, 1 ) == '#' ) {
2718                         $colonPos = strpos( $part1, ':' );
2719                         if ( $colonPos !== false ) {
2720                                 $function = strtolower( substr( $part1, 1, $colonPos - 1 ) );
2721                                 if ( isset( $this->mFunctionHooks[$function] ) ) {
2722                                         $funcArgs = array_map( 'trim', $args );
2723                                         $funcArgs = array_merge( array( &$this, trim( substr( $part1, $colonPos + 1 ) ) ), $funcArgs );
2724                                         $result = call_user_func_array( $this->mFunctionHooks[$function], $funcArgs );
2725                                         $found = true;
2726
2727                                         // The text is usually already parsed, doesn't need triple-brace tags expanded, etc.
2728                                         //$noargs = true;
2729                                         //$noparse = true;
2730
2731                                         if ( is_array( $result ) ) {
2732                                                 $text = $linestart . $result[0];
2733                                                 unset( $result[0] );
2734
2735                                                 // Extract flags into the local scope
2736                                                 // This allows callers to set flags such as nowiki, noparse, found, etc.
2737                                                 extract( $result );
2738                                         } else {
2739                                                 $text = $linestart . $result;
2740                                         }
2741                                 }
2742                         }
2743                 }
2744
2745                 # Template table test
2746
2747                 # Did we encounter this template already? If yes, it is in the cache
2748                 # and we need to check for loops.
2749                 if ( !$found && isset( $this->mTemplates[$piece['title']] ) ) {
2750                         $found = true;
2751
2752                         # Infinite loop test
2753                         if ( isset( $this->mTemplatePath[$part1] ) ) {
2754                                 $noparse = true;
2755                                 $noargs = true;
2756                                 $found = true;
2757                                 $text = $linestart .
2758                                         '{{' . $part1 . '}}' .
2759                                         '<!-- WARNING: template loop detected -->';
2760                                 wfDebug( "$fname: template loop broken at '$part1'\n" );
2761                         } else {
2762                                 # set $text to cached message.
2763                                 $text = $linestart . $this->mTemplates[$piece['title']];
2764                         }
2765                 }
2766
2767                 # Load from database
2768                 $lastPathLevel = $this->mTemplatePath;
2769                 if ( !$found ) {
2770                         $ns = NS_TEMPLATE;
2771                         # declaring $subpage directly in the function call
2772                         # does not work correctly with references and breaks
2773                         # {{/subpage}}-style inclusions
2774                         $subpage = '';
2775                         $part1 = $this->maybeDoSubpageLink( $part1, $subpage );
2776                         if ($subpage !== '') {
2777                                 $ns = $this->mTitle->getNamespace();
2778                         }
2779                         $title = Title::newFromText( $part1, $ns );
2780
2781                         if ( !is_null( $title ) ) {
2782                                 if ( !$title->isExternal() ) {
2783                                         # Check for excessive inclusion
2784                                         $dbk = $title->getPrefixedDBkey();
2785                                         if ( $this->incrementIncludeCount( $dbk ) ) {
2786                                                 if ( $title->getNamespace() == NS_SPECIAL && $this->mOptions->getAllowSpecialInclusion() && $this->mOutputType != OT_WIKI ) {
2787                                                         $text = SpecialPage::capturePath( $title );
2788                                                         if ( is_string( $text ) ) {
2789                                                                 $found = true;
2790                                                                 $noparse = true;
2791                                                                 $noargs = true;
2792                                                                 $isHTML = true;
2793                                                                 $this->disableCache();
2794                                                         }
2795                                                 } else {
2796                                                         $articleContent = $this->fetchTemplate( $title );
2797                                                         if ( $articleContent !== false ) {
2798                                                                 $found = true;
2799                                                                 $text = $articleContent;
2800                                                                 $replaceHeadings = true;
2801                                                         }
2802                                                 }
2803                                         }
2804
2805                                         # If the title is valid but undisplayable, make a link to it
2806                                         if ( $this->mOutputType == OT_HTML && !$found ) {
2807                                                 $text = '[['.$title->getPrefixedText().']]';
2808                                                 $found = true;
2809                                         }
2810                                 } elseif ( $title->isTrans() ) {
2811                                         // Interwiki transclusion
2812                                         if ( $this->mOutputType == OT_HTML && !$forceRawInterwiki ) {
2813                                                 $text = $this->interwikiTransclude( $title, 'render' );
2814                                                 $isHTML = true;
2815                                                 $noparse = true;
2816                                         } else {
2817                                                 $text = $this->interwikiTransclude( $title, 'raw' );
2818                                                 $replaceHeadings = true;
2819                                         }
2820                                         $found = true;
2821                                 }
2822
2823                                 # Template cache array insertion
2824                                 # Use the original $piece['title'] not the mangled $part1, so that
2825                                 # modifiers such as RAW: produce separate cache entries
2826                                 if( $found ) {
2827                                         $this->mTemplates[$piece['title']] = $text;
2828                                         $text = $linestart . $text;
2829                                 }
2830                         }
2831                 }
2832
2833                 # Recursive parsing, escaping and link table handling
2834                 # Only for HTML output
2835                 if ( $nowiki && $found && $this->mOutputType == OT_HTML ) {
2836                         $text = wfEscapeWikiText( $text );
2837                 } elseif ( ($this->mOutputType == OT_HTML || $this->mOutputType == OT_WIKI) && $found ) {
2838                         if ( $noargs ) {
2839                                 $assocArgs = array();
2840                         } else {
2841                                 # Clean up argument array
2842                                 $assocArgs = array();
2843                                 $index = 1;
2844                                 foreach( $args as $arg ) {
2845                                         $eqpos = strpos( $arg, '=' );
2846                                         if ( $eqpos === false ) {
2847                                                 $assocArgs[$index++] = $arg;
2848                                         } else {
2849                                                 $name = trim( substr( $arg, 0, $eqpos ) );
2850                                                 $value = trim( substr( $arg, $eqpos+1 ) );
2851                                                 if ( $value === false ) {
2852                                                         $value = '';
2853                                                 }
2854                                                 if ( $name !== false ) {
2855                                                         $assocArgs[$name] = $value;
2856                                                 }
2857                                         }
2858                                 }
2859
2860                                 # Add a new element to the templace recursion path
2861                                 $this->mTemplatePath[$part1] = 1;
2862                         }
2863
2864                         if ( !$noparse ) {
2865                                 # If there are any <onlyinclude> tags, only include them
2866                                 if ( in_string( '<onlyinclude>', $text ) && in_string( '</onlyinclude>', $text ) ) {
2867                                         preg_match_all( '/<onlyinclude>(.*?)\n?<\/onlyinclude>/s', $text, $m );
2868                                         $text = '';
2869                                         foreach ($m[1] as $piece)
2870                                                 $text .= $piece;
2871                                 }
2872                                 # Remove <noinclude> sections and <includeonly> tags
2873                                 $text = preg_replace( '/<noinclude>.*?<\/noinclude>/s', '', $text );
2874                                 $text = strtr( $text, array( '<includeonly>' => '' , '</includeonly>' => '' ) );
2875
2876                                 if( $this->mOutputType == OT_HTML ) {
2877                                         # Strip <nowiki>, <pre>, etc.
2878                                         $text = $this->strip( $text, $this->mStripState );
2879                                         $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'replaceVariables' ), $assocArgs );
2880                                 }
2881                                 $text = $this->replaceVariables( $text, $assocArgs );
2882
2883                                 # If the template begins with a table or block-level
2884                                 # element, it should be treated as beginning a new line.
2885                                 if (!$piece['lineStart'] && preg_match('/^({\\||:|;|#|\*)/', $text)) {
2886                                         $text = "\n" . $text;
2887                                 }
2888                         } elseif ( !$noargs ) {
2889                                 # $noparse and !$noargs
2890                                 # Just replace the arguments, not any double-brace items
2891                                 # This is used for rendered interwiki transclusion
2892                                 $text = $this->replaceVariables( $text, $assocArgs, true );
2893                         }
2894                 }
2895                 # Prune lower levels off the recursion check path
2896                 $this->mTemplatePath = $lastPathLevel;
2897
2898                 if ( !$found ) {
2899                         wfProfileOut( $fname );
2900                         return $piece['text'];
2901                 } else {
2902                         if ( $isHTML ) {
2903                                 # Replace raw HTML by a placeholder
2904                                 # Add a blank line preceding, to prevent it from mucking up
2905                                 # immediately preceding headings
2906                                 $text = "\n\n" . $this->insertStripItem( $text, $this->mStripState );
2907                         } else {
2908                                 # replace ==section headers==
2909                                 # XXX this needs to go away once we have a better parser.
2910                                 if ( $this->mOutputType != OT_WIKI && $replaceHeadings ) {
2911                                         if( !is_null( $title ) )
2912                                                 $encodedname = base64_encode($title->getPrefixedDBkey());
2913                                         else
2914                                                 $encodedname = base64_encode("");
2915                                         $m = preg_split('/(^={1,6}.*?={1,6}\s*?$)/m', $text, -1,
2916                                                 PREG_SPLIT_DELIM_CAPTURE);
2917                                         $text = '';
2918                                         $nsec = 0;
2919                                         for( $i = 0; $i < count($m); $i += 2 ) {
2920                                                 $text .= $m[$i];
2921                                                 if (!isset($m[$i + 1]) || $m[$i + 1] == "") continue;
2922                                                 $hl = $m[$i + 1];
2923                                                 if( strstr($hl, "<!--MWTEMPLATESECTION") ) {
2924                                                         $text .= $hl;
2925                                                         continue;
2926                                                 }
2927                                                 preg_match('/^(={1,6})(.*?)(={1,6})\s*?$/m', $hl, $m2);
2928                                                 $text .= $m2[1] . $m2[2] . "<!--MWTEMPLATESECTION="
2929                                                         . $encodedname . "&" . base64_encode("$nsec") . "-->" . $m2[3];
2930
2931                                                 $nsec++;
2932                                         }
2933                                 }
2934                         }
2935                 }
2936
2937                 # Prune lower levels off the recursion check path
2938                 $this->mTemplatePath = $lastPathLevel;
2939
2940                 if ( !$found ) {
2941                         wfProfileOut( $fname );
2942                         return $piece['text'];
2943                 } else {
2944                         wfProfileOut( $fname );
2945                         return $text;
2946                 }
2947         }
2948
2949         /**
2950          * Fetch the unparsed text of a template and register a reference to it.
2951          */
2952         function fetchTemplate( $title ) {
2953                 $text = false;
2954                 // Loop to fetch the article, with up to 1 redirect
2955                 for ( $i = 0; $i < 2 && is_object( $title ); $i++ ) {
2956                         $rev = Revision::newFromTitle( $title );
2957                         $this->mOutput->addTemplate( $title, $title->getArticleID() );
2958                         if ( !$rev ) {
2959                                 break;
2960                         }
2961                         $text = $rev->getText();
2962                         if ( $text === false ) {
2963                                 break;
2964                         }
2965                         // Redirect?
2966                         $title = Title::newFromRedirect( $text );
2967                 }
2968                 return $text;
2969         }
2970
2971         /**
2972          * Transclude an interwiki link.
2973          */
2974         function interwikiTransclude( $title, $action ) {
2975                 global $wgEnableScaryTranscluding, $wgCanonicalNamespaceNames;
2976
2977                 if (!$wgEnableScaryTranscluding)
2978                         return wfMsg('scarytranscludedisabled');
2979
2980                 // The namespace will actually only be 0 or 10, depending on whether there was a leading :
2981                 // But we'll handle it generally anyway
2982                 if ( $title->getNamespace() ) {
2983                         // Use the canonical namespace, which should work anywhere
2984                         $articleName = $wgCanonicalNamespaceNames[$title->getNamespace()] . ':' . $title->getDBkey();
2985                 } else {
2986                         $articleName = $title->getDBkey();
2987                 }
2988
2989                 $url = str_replace('$1', urlencode($articleName), Title::getInterwikiLink($title->getInterwiki()));
2990                 $url .= "?action=$action";
2991                 if (strlen($url) > 255)
2992                         return wfMsg('scarytranscludetoolong');
2993                 return $this->fetchScaryTemplateMaybeFromCache($url);
2994         }
2995
2996         function fetchScaryTemplateMaybeFromCache($url) {
2997                 global $wgTranscludeCacheExpiry;
2998                 $dbr =& wfGetDB(DB_SLAVE);
2999                 $obj = $dbr->selectRow('transcache', array('tc_time', 'tc_contents'),
3000                                 array('tc_url' => $url));
3001                 if ($obj) {
3002                         $time = $obj->tc_time;
3003                         $text = $obj->tc_contents;
3004                         if ($time && time() < $time + $wgTranscludeCacheExpiry ) {
3005                                 return $text;
3006                         }
3007                 }
3008
3009                 $text = wfGetHTTP($url);
3010                 if (!$text)
3011                         return wfMsg('scarytranscludefailed', $url);
3012
3013                 $dbw =& wfGetDB(DB_MASTER);
3014                 $dbw->replace('transcache', array('tc_url'), array(
3015                         'tc_url' => $url,
3016                         'tc_time' => time(),
3017                         'tc_contents' => $text));
3018                 return $text;
3019         }
3020
3021
3022         /**
3023          * Triple brace replacement -- used for template arguments
3024          * @private
3025          */
3026         function argSubstitution( $matches ) {
3027                 $arg = trim( $matches['title'] );
3028                 $text = $matches['text'];
3029                 $inputArgs = end( $this->mArgStack );
3030
3031                 if ( array_key_exists( $arg, $inputArgs ) ) {
3032                         $text = $inputArgs[$arg];
3033                 } else if ($this->mOutputType == OT_HTML && null != $matches['parts'] && count($matches['parts']) > 0) {
3034                         $text = $matches['parts'][0];
3035                 }
3036
3037                 return $text;
3038         }
3039
3040         /**
3041          * Returns true if the function is allowed to include this entity
3042          * @private
3043          */
3044         function incrementIncludeCount( $dbk ) {
3045                 if ( !array_key_exists( $dbk, $this->mIncludeCount ) ) {
3046                         $this->mIncludeCount[$dbk] = 0;
3047                 }
3048                 if ( ++$this->mIncludeCount[$dbk] <= MAX_INCLUDE_REPEAT ) {
3049                         return true;
3050                 } else {
3051                         return false;
3052                 }
3053         }
3054
3055         /**
3056          * Detect __TOC__ magic word and set a placeholder
3057          */
3058         function stripToc( $text ) {
3059                 # if the string __NOTOC__ (not case-sensitive) occurs in the HTML,
3060                 # do not add TOC
3061                 $mw = MagicWord::get( MAG_NOTOC );
3062                 if( $mw->matchAndRemove( $text ) ) {
3063                         $this->mShowToc = false;
3064                 }
3065
3066                 $mw = MagicWord::get( MAG_TOC );
3067                 if( $mw->match( $text ) ) {
3068                         $this->mShowToc = true;
3069                         $this->mForceTocPosition = true;
3070
3071                         // Set a placeholder. At the end we'll fill it in with the TOC.
3072                         $text = $mw->replace( '<!--MWTOC-->', $text, 1 );
3073
3074                         // Only keep the first one.
3075                         $text = $mw->replace( '', $text );
3076                 }
3077                 return $text;
3078         }
3079
3080         /**
3081          * This function accomplishes several tasks:
3082          * 1) Auto-number headings if that option is enabled
3083          * 2) Add an [edit] link to sections for logged in users who have enabled the option
3084          * 3) Add a Table of contents on the top for users who have enabled the option
3085          * 4) Auto-anchor headings
3086          *
3087          * It loops through all headlines, collects the necessary data, then splits up the
3088          * string and re-inserts the newly formatted headlines.
3089          *
3090          * @param string $text
3091          * @param boolean $isMain
3092          * @private
3093          */
3094         function formatHeadings( $text, $isMain=true ) {
3095                 global $wgMaxTocLevel, $wgContLang;
3096
3097                 $doNumberHeadings = $this->mOptions->getNumberHeadings();
3098                 if( !$this->mTitle->userCanEdit() ) {
3099                         $showEditLink = 0;
3100                 } else {
3101                         $showEditLink = $this->mOptions->getEditSection();
3102                 }
3103
3104                 # Inhibit editsection links if requested in the page
3105                 $esw =& MagicWord::get( MAG_NOEDITSECTION );
3106                 if( $esw->matchAndRemove( $text ) ) {
3107                         $showEditLink = 0;
3108                 }
3109
3110                 # Get all headlines for numbering them and adding funky stuff like [edit]
3111                 # links - this is for later, but we need the number of headlines right now
3112                 $numMatches = preg_match_all( '/<H([1-6])(.*?'.'>)(.*?)<\/H[1-6] *>/i', $text, $matches );
3113
3114                 # if there are fewer than 4 headlines in the article, do not show TOC
3115                 # unless it's been explicitly enabled.
3116                 $enoughToc = $this->mShowToc &&
3117                         (($numMatches >= 4) || $this->mForceTocPosition);
3118
3119                 # Allow user to stipulate that a page should have a "new section"
3120                 # link added via __NEWSECTIONLINK__
3121                 $mw =& MagicWord::get( MAG_NEWSECTIONLINK );
3122                 if( $mw->matchAndRemove( $text ) )
3123                         $this->mOutput->setNewSection( true );
3124
3125                 # if the string __FORCETOC__ (not case-sensitive) occurs in the HTML,
3126                 # override above conditions and always show TOC above first header
3127                 $mw =& MagicWord::get( MAG_FORCETOC );
3128                 if ($mw->matchAndRemove( $text ) ) {
3129                         $this->mShowToc = true;
3130                         $enoughToc = true;
3131                 }
3132
3133                 # Never ever show TOC if no headers
3134                 if( $numMatches < 1 ) {
3135                         $enoughToc = false;
3136                 }
3137
3138                 # We need this to perform operations on the HTML
3139                 $sk =& $this->mOptions->getSkin();
3140
3141                 # headline counter
3142                 $headlineCount = 0;
3143                 $sectionCount = 0; # headlineCount excluding template sections
3144
3145                 # Ugh .. the TOC should have neat indentation levels which can be
3146                 # passed to the skin functions. These are determined here
3147                 $toc = '';
3148                 $full = '';
3149                 $head = array();
3150                 $sublevelCount = array();
3151                 $levelCount = array();
3152                 $toclevel = 0;
3153                 $level = 0;
3154                 $prevlevel = 0;
3155                 $toclevel = 0;
3156                 $prevtoclevel = 0;
3157
3158                 foreach( $matches[3] as $headline ) {
3159                         $istemplate = 0;
3160                         $templatetitle = '';
3161                         $templatesection = 0;
3162                         $numbering = '';
3163
3164                         if (preg_match("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", $headline, $mat)) {
3165                                 $istemplate = 1;
3166                                 $templatetitle = base64_decode($mat[1]);
3167                                 $templatesection = 1 + (int)base64_decode($mat[2]);
3168                                 $headline = preg_replace("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", "", $headline);
3169                         }
3170
3171                         if( $toclevel ) {
3172                                 $prevlevel = $level;
3173                                 $prevtoclevel = $toclevel;
3174                         }
3175                         $level = $matches[1][$headlineCount];
3176
3177                         if( $doNumberHeadings || $enoughToc ) {
3178
3179                                 if ( $level > $prevlevel ) {
3180                                         # Increase TOC level
3181                                         $toclevel++;
3182                                         $sublevelCount[$toclevel] = 0;
3183                                         if( $toclevel<$wgMaxTocLevel ) {
3184                                                 $toc .= $sk->tocIndent();
3185                                         }
3186                                 }
3187                                 elseif ( $level < $prevlevel && $toclevel > 1 ) {
3188                                         # Decrease TOC level, find level to jump to
3189
3190                                         if ( $toclevel == 2 && $level <= $levelCount[1] ) {
3191                                                 # Can only go down to level 1
3192                                                 $toclevel = 1;
3193                                         } else {
3194                                                 for ($i = $toclevel; $i > 0; $i--) {
3195                                                         if ( $levelCount[$i] == $level ) {
3196                                                                 # Found last matching level
3197                                                                 $toclevel = $i;
3198                                                                 break;
3199                                                         }
3200                                                         elseif ( $levelCount[$i] < $level ) {
3201                                                                 # Found first matching level below current level
3202                                                                 $toclevel = $i + 1;
3203                                                                 break;
3204                                                         }
3205                                                 }
3206                                         }
3207                                         if( $toclevel<$wgMaxTocLevel ) {
3208                                                 $toc .= $sk->tocUnindent( $prevtoclevel - $toclevel );
3209                                         }
3210                                 }
3211                                 else {
3212                                         # No change in level, end TOC line
3213                                         if( $toclevel<$wgMaxTocLevel ) {
3214                                                 $toc .= $sk->tocLineEnd();
3215                                         }
3216                                 }
3217
3218                                 $levelCount[$toclevel] = $level;
3219
3220                                 # count number of headlines for each level
3221                                 @$sublevelCount[$toclevel]++;
3222                                 $dot = 0;
3223                                 for( $i = 1; $i <= $toclevel; $i++ ) {
3224                                         if( !empty( $sublevelCount[$i] ) ) {
3225                                                 if( $dot ) {
3226                                                         $numbering .= '.';
3227                                                 }
3228                                                 $numbering .= $wgContLang->formatNum( $sublevelCount[$i] );
3229                                                 $dot = 1;
3230                                         }
3231                                 }
3232                         }
3233
3234                         # The canonized header is a version of the header text safe to use for links
3235                         # Avoid insertion of weird stuff like <math> by expanding the relevant sections
3236                         $canonized_headline = $this->unstrip( $headline, $this->mStripState );
3237                         $canonized_headline = $this->unstripNoWiki( $canonized_headline, $this->mStripState );
3238
3239                         # Remove link placeholders by the link text.
3240                         #     <!--LINK number-->
3241                         # turns into
3242                         #     link text with suffix
3243                         $canonized_headline = preg_replace( '/<!--LINK ([0-9]*)-->/e',
3244                                                             "\$this->mLinkHolders['texts'][\$1]",
3245                                                             $canonized_headline );
3246                         $canonized_headline = preg_replace( '/<!--IWLINK ([0-9]*)-->/e',
3247                                                             "\$this->mInterwikiLinkHolders['texts'][\$1]",
3248                                                             $canonized_headline );
3249
3250                         # strip out HTML
3251                         $canonized_headline = preg_replace( '/<.*?' . '>/','',$canonized_headline );
3252                         $tocline = trim( $canonized_headline );
3253                         # Save headline for section edit hint before it's escaped
3254                         $headline_hint = trim( $canonized_headline );
3255                         $canonized_headline = Sanitizer::escapeId( $tocline );
3256                         $refers[$headlineCount] = $canonized_headline;
3257
3258                         # count how many in assoc. array so we can track dupes in anchors
3259                         @$refers[$canonized_headline]++;
3260                         $refcount[$headlineCount]=$refers[$canonized_headline];
3261
3262                         # Don't number the heading if it is the only one (looks silly)
3263                         if( $doNumberHeadings && count( $matches[3] ) > 1) {
3264                                 # the two are different if the line contains a link
3265                                 $headline=$numbering . ' ' . $headline;
3266                         }
3267
3268                         # Create the anchor for linking from the TOC to the section
3269                         $anchor = $canonized_headline;
3270                         if($refcount[$headlineCount] > 1 ) {
3271                                 $anchor .= '_' . $refcount[$headlineCount];
3272                         }
3273                         if( $enoughToc && ( !isset($wgMaxTocLevel) || $toclevel<$wgMaxTocLevel ) ) {
3274                                 $toc .= $sk->tocLine($anchor, $tocline, $numbering, $toclevel);
3275                         }
3276                         if( $showEditLink && ( !$istemplate || $templatetitle !== "" ) ) {
3277                                 if ( empty( $head[$headlineCount] ) ) {
3278                                         $head[$headlineCount] = '';
3279                                 }
3280                                 if( $istemplate )
3281                                         $head[$headlineCount] .= $sk->editSectionLinkForOther($templatetitle, $templatesection);
3282                                 else
3283                                         $head[$headlineCount] .= $sk->editSectionLink($this->mTitle, $sectionCount+1, $headline_hint);
3284                         }
3285
3286                         # give headline the correct <h#> tag
3287                         @$head[$headlineCount] .= "<a name=\"$anchor\"></a><h".$level.$matches[2][$headlineCount] .$headline.'</h'.$level.'>';
3288
3289                         $headlineCount++;
3290                         if( !$istemplate )
3291                                 $sectionCount++;
3292                 }
3293
3294                 if( $enoughToc ) {
3295                         if( $toclevel<$wgMaxTocLevel ) {
3296                                 $toc .= $sk->tocUnindent( $toclevel - 1 );
3297                         }
3298                         $toc = $sk->tocList( $toc );
3299                 }
3300
3301                 # split up and insert constructed headlines
3302
3303                 $blocks = preg_split( '/<H[1-6].*?' . '>.*?<\/H[1-6]>/i', $text );
3304                 $i = 0;
3305
3306                 foreach( $blocks as $block ) {
3307                         if( $showEditLink && $headlineCount > 0 && $i == 0 && $block != "\n" ) {
3308                                 # This is the [edit] link that appears for the top block of text when
3309                                 # section editing is enabled
3310
3311                                 # Disabled because it broke block formatting
3312                                 # For example, a bullet point in the top line
3313                                 # $full .= $sk->editSectionLink(0);
3314                         }
3315                         $full .= $block;
3316                         if( $enoughToc && !$i && $isMain && !$this->mForceTocPosition ) {
3317                                 # Top anchor now in skin
3318                                 $full = $full.$toc;
3319                         }
3320
3321                         if( !empty( $head[$i] ) ) {
3322                                 $full .= $head[$i];
3323                         }
3324                         $i++;
3325                 }
3326                 if( $this->mForceTocPosition ) {
3327                         return str_replace( '<!--MWTOC-->', $toc, $full );
3328                 } else {
3329                         return $full;
3330                 }
3331         }
3332
3333         /**
3334          * Return an HTML link for the "ISBN 123456" text
3335          * @private
3336          */
3337         function magicISBN( $text ) {
3338                 $fname = 'Parser::magicISBN';
3339                 wfProfileIn( $fname );
3340
3341                 $a = split( 'ISBN ', ' '.$text );
3342                 if ( count ( $a ) < 2 ) {
3343                         wfProfileOut( $fname );
3344                         return $text;
3345                 }
3346                 $text = substr( array_shift( $a ), 1);
3347                 $valid = '0123456789-Xx';
3348
3349                 foreach ( $a as $x ) {
3350                         # hack: don't replace inside thumbnail title/alt
3351                         # attributes
3352                         if(preg_match('/<[^>]+(alt|title)="[^">]*$/', $text)) {
3353                                 $text .= "ISBN $x";
3354                                 continue;
3355                         }
3356
3357                         $isbn = $blank = '' ;
3358                         while ( ' ' == $x{0} ) {
3359                                 $blank .= ' ';
3360                                 $x = substr( $x, 1 );
3361                         }
3362                         if ( $x == '' ) { # blank isbn
3363                                 $text .= "ISBN $blank";
3364                                 continue;
3365                         }
3366                         while ( strstr( $valid, $x{0} ) != false ) {
3367                                 $isbn .= $x{0};
3368                                 $x = substr( $x, 1 );
3369                         }
3370                         $num = str_replace( '-', '', $isbn );
3371                         $num = str_replace( ' ', '', $num );
3372                         $num = str_replace( 'x', 'X', $num );
3373
3374                         if ( '' == $num ) {
3375                                 $text .= "ISBN $blank$x";
3376                         } else {
3377                                 $titleObj = Title::makeTitle( NS_SPECIAL, 'Booksources' );
3378                                 $text .= '<a href="' .
3379                                         $titleObj->escapeLocalUrl( 'isbn='.$num ) .
3380                                         "\" class=\"internal\">ISBN $isbn</a>";
3381                                 $text .= $x;
3382                         }
3383                 }
3384                 wfProfileOut( $fname );
3385                 return $text;
3386         }
3387
3388         /**
3389          * Return an HTML link for the "RFC 1234" text
3390          *
3391          * @private
3392          * @param string $text     Text to be processed
3393          * @param string $keyword  Magic keyword to use (default RFC)
3394          * @param string $urlmsg   Interface message to use (default rfcurl)
3395          * @return string
3396          */
3397         function magicRFC( $text, $keyword='RFC ', $urlmsg='rfcurl'  ) {
3398
3399                 $valid = '0123456789';
3400                 $internal = false;
3401
3402                 $a = split( $keyword, ' '.$text );
3403                 if ( count ( $a ) < 2 ) {
3404                         return $text;
3405                 }
3406                 $text = substr( array_shift( $a ), 1);
3407
3408                 /* Check if keyword is preceed by [[.
3409                  * This test is made here cause of the array_shift above
3410                  * that prevent the test to be done in the foreach.
3411                  */
3412                 if ( substr( $text, -2 ) == '[[' ) {
3413                         $internal = true;
3414                 }
3415
3416                 foreach ( $a as $x ) {
3417                         /* token might be empty if we have RFC RFC 1234 */
3418                         if ( $x=='' ) {
3419                                 $text.=$keyword;
3420                                 continue;
3421                                 }
3422
3423                         # hack: don't replace inside thumbnail title/alt
3424                         # attributes
3425                         if(preg_match('/<[^>]+(alt|title)="[^">]*$/', $text)) {
3426                                 $text .= $keyword . $x;
3427                                 continue;
3428                         }
3429
3430                         $id = $blank = '' ;
3431
3432                         /** remove and save whitespaces in $blank */
3433                         while ( $x{0} == ' ' ) {
3434                                 $blank .= ' ';
3435                                 $x = substr( $x, 1 );
3436                         }
3437
3438                         /** remove and save the rfc number in $id */
3439                         while ( strstr( $valid, $x{0} ) != false ) {
3440                                 $id .= $x{0};
3441                                 $x = substr( $x, 1 );
3442                         }
3443
3444                         if ( $id == '' ) {
3445                                 /* call back stripped spaces*/
3446                                 $text .= $keyword.$blank.$x;
3447                         } elseif( $internal ) {
3448                                 /* normal link */
3449                                 $text .= $keyword.$id.$x;
3450                         } else {
3451                                 /* build the external link*/
3452                                 $url = wfMsg( $urlmsg, $id);
3453                                 $sk =& $this->mOptions->getSkin();
3454                                 $la = $sk->getExternalLinkAttributes( $url, $keyword.$id );
3455                                 $text .= "<a href='{$url}'{$la}>{$keyword}{$id}</a>{$x}";
3456                         }
3457
3458                         /* Check if the next RFC keyword is preceed by [[ */
3459                         $internal = ( substr($x,-2) == '[[' );
3460                 }
3461                 return $text;
3462         }
3463
3464         /**
3465          * Transform wiki markup when saving a page by doing \r\n -> \n
3466          * conversion, substitting signatures, {{subst:}} templates, etc.
3467          *
3468          * @param string $text the text to transform
3469          * @param Title &$title the Title object for the current article
3470          * @param User &$user the User object describing the current user
3471          * @param ParserOptions $options parsing options
3472          * @param bool $clearState whether to clear the parser state first
3473          * @return string the altered wiki markup
3474          * @public
3475          */
3476         function preSaveTransform( $text, &$title, &$user, $options, $clearState = true ) {
3477                 $this->mOptions = $options;
3478                 $this->mTitle =& $title;
3479                 $this->mOutputType = OT_WIKI;
3480
3481                 if ( $clearState ) {
3482                         $this->clearState();
3483                 }
3484
3485                 $stripState = false;
3486                 $pairs = array(
3487                         "\r\n" => "\n",
3488                 );
3489                 $text = str_replace( array_keys( $pairs ), array_values( $pairs ), $text );
3490                 $text = $this->strip( $text, $stripState, true );
3491                 $text = $this->pstPass2( $text, $stripState, $user );
3492                 $text = $this->unstrip( $text, $stripState );
3493                 $text = $this->unstripNoWiki( $text, $stripState );
3494                 return $text;
3495         }
3496
3497         /**
3498          * Pre-save transform helper function
3499          * @private
3500          */
3501         function pstPass2( $text, &$stripState, &$user ) {
3502                 global $wgContLang, $wgLocaltimezone;
3503
3504                 /* Note: This is the timestamp saved as hardcoded wikitext to
3505                  * the database, we use $wgContLang here in order to give
3506                  * everyone the same signature and use the default one rather
3507                  * than the one selected in each user's preferences.
3508                  */
3509                 if ( isset( $wgLocaltimezone ) ) {
3510                         $oldtz = getenv( 'TZ' );
3511                         putenv( 'TZ='.$wgLocaltimezone );
3512                 }
3513                 $d = $wgContLang->timeanddate( date( 'YmdHis' ), false, false) .
3514                   ' (' . date( 'T' ) . ')';
3515                 if ( isset( $wgLocaltimezone ) ) {
3516                         putenv( 'TZ='.$oldtz );
3517                 }
3518
3519                 # Variable replacement
3520                 # Because mOutputType is OT_WIKI, this will only process {{subst:xxx}} type tags
3521                 $text = $this->replaceVariables( $text );
3522
3523                 # Strip out <nowiki> etc. added via replaceVariables
3524                 $text = $this->strip( $text, $stripState );
3525
3526                 # Signatures
3527                 $sigText = $this->getUserSig( $user );
3528                 $text = strtr( $text, array(
3529                         '~~~~~' => $d,
3530                         '~~~~' => "$sigText $d",
3531                         '~~~' => $sigText
3532                 ) );
3533
3534                 # Context links: [[|name]] and [[name (context)|]]
3535                 #
3536                 global $wgLegalTitleChars;
3537                 $tc = "[$wgLegalTitleChars]";
3538                 $np = str_replace( array( '(', ')' ), array( '', '' ), $tc ); # No parens
3539
3540                 $namespacechar = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
3541                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
3542
3543                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
3544                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
3545                 $p3 = "/\[\[(:*$namespacechar+):({$np}+)\\|]]/";                # [[namespace:page|]] and [[:namespace:page|]]
3546                 $p4 = "/\[\[(:*$namespacechar+):({$np}+) \\(({$np}+)\\)\\|]]/"; # [[ns:page (cont)|]] and [[:ns:page (cont)|]]
3547                 $context = '';
3548                 $t = $this->mTitle->getText();
3549                 if ( preg_match( $conpat, $t, $m ) ) {
3550                         $context = $m[2];
3551                 }
3552                 $text = preg_replace( $p4, '[[\\1:\\2 (\\3)|\\2]]', $text );
3553                 $text = preg_replace( $p1, '[[\\1 (\\2)|\\1]]', $text );
3554                 $text = preg_replace( $p3, '[[\\1:\\2|\\2]]', $text );
3555
3556                 if ( '' == $context ) {
3557                         $text = preg_replace( $p2, '[[\\1]]', $text );
3558                 } else {
3559                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
3560                 }
3561
3562                 # Trim trailing whitespace
3563                 # MAG_END (__END__) tag allows for trailing
3564                 # whitespace to be deliberately included
3565                 $text = rtrim( $text );
3566                 $mw =& MagicWord::get( MAG_END );
3567                 $mw->matchAndRemove( $text );
3568
3569                 return $text;
3570         }
3571
3572         /**
3573          * Fetch the user's signature text, if any, and normalize to
3574          * validated, ready-to-insert wikitext.
3575          *
3576          * @param User $user
3577          * @return string
3578          * @private
3579          */
3580         function getUserSig( &$user ) {
3581                 $username = $user->getName();
3582                 $nickname = $user->getOption( 'nickname' );
3583                 $nickname = $nickname === '' ? $username : $nickname;
3584
3585                 if( $user->getBoolOption( 'fancysig' ) !== false ) {
3586                         # Sig. might contain markup; validate this
3587                         if( $this->validateSig( $nickname ) !== false ) {
3588                                 # Validated; clean up (if needed) and return it
3589                                 return $this->cleanSig( $nickname, true );
3590                         } else {
3591                                 # Failed to validate; fall back to the default
3592                                 $nickname = $username;
3593                                 wfDebug( "Parser::getUserSig: $username has bad XML tags in signature.\n" );
3594                         }
3595                 }
3596
3597                 # If we're still here, make it a link to the user page
3598                 $userpage = $user->getUserPage();
3599                 return( '[[' . $userpage->getPrefixedText() . '|' . wfEscapeWikiText( $nickname ) . ']]' );
3600         }
3601
3602         /**
3603          * Check that the user's signature contains no bad XML
3604          *
3605          * @param string $text
3606          * @return mixed An expanded string, or false if invalid.
3607          */
3608         function validateSig( $text ) {
3609                 return( wfIsWellFormedXmlFragment( $text ) ? $text : false );
3610         }
3611
3612         /**
3613          * Clean up signature text
3614          *
3615          * 1) Strip ~~~, ~~~~ and ~~~~~ out of signatures
3616          * 2) Substitute all transclusions
3617          *
3618          * @param string $text
3619          * @param $parsing Whether we're cleaning (preferences save) or parsing
3620          * @return string Signature text
3621          */
3622         function cleanSig( $text, $parsing = false ) {
3623                 global $wgTitle;
3624                 $this->startExternalParse( $wgTitle, new ParserOptions(), $parsing ? OT_WIKI : OT_MSG );
3625
3626                 $substWord = MagicWord::get( MAG_SUBST );
3627                 $substRegex = '/\{\{(?!(?:' . $substWord->getBaseRegex() . '))/x' . $substWord->getRegexCase();
3628                 $substText = '{{' . $substWord->getSynonym( 0 );
3629
3630                 $text = preg_replace( $substRegex, $substText, $text );
3631                 $text = preg_replace( '/~{3,5}/', '', $text );
3632                 $text = $this->replaceVariables( $text );
3633
3634                 $this->clearState();
3635                 return $text;
3636         }
3637
3638         /**
3639          * Set up some variables which are usually set up in parse()
3640          * so that an external function can call some class members with confidence
3641          * @public
3642          */
3643         function startExternalParse( &$title, $options, $outputType, $clearState = true ) {
3644                 $this->mTitle =& $title;
3645                 $this->mOptions = $options;
3646                 $this->mOutputType = $outputType;
3647                 if ( $clearState ) {
3648                         $this->clearState();
3649                 }
3650         }
3651
3652         /**
3653          * Transform a MediaWiki message by replacing magic variables.
3654          *
3655          * @param string $text the text to transform
3656          * @param ParserOptions $options  options
3657          * @return string the text with variables substituted
3658          * @public
3659          */
3660         function transformMsg( $text, $options ) {
3661                 global $wgTitle;
3662                 static $executing = false;
3663
3664                 $fname = "Parser::transformMsg";
3665
3666                 # Guard against infinite recursion
3667                 if ( $executing ) {
3668                         return $text;
3669                 }
3670                 $executing = true;
3671
3672                 wfProfileIn($fname);
3673
3674                 $this->mTitle = $wgTitle;
3675                 $this->mOptions = $options;
3676                 $this->mOutputType = OT_MSG;
3677                 $this->clearState();
3678                 $text = $this->replaceVariables( $text );
3679
3680                 $executing = false;
3681                 wfProfileOut($fname);
3682                 return $text;
3683         }
3684
3685         /**
3686          * Create an HTML-style tag, e.g. <yourtag>special text</yourtag>
3687          * The callback should have the following form:
3688          *    function myParserHook( $text, $params, &$parser ) { ... }
3689          *
3690          * Transform and return $text. Use $parser for any required context, e.g. use
3691          * $parser->getTitle() and $parser->getOptions() not $wgTitle or $wgOut->mParserOptions
3692          *
3693          * @public
3694          *
3695          * @param mixed $tag The tag to use, e.g. 'hook' for <hook>
3696          * @param mixed $callback The callback function (and object) to use for the tag
3697          *
3698          * @return The old value of the mTagHooks array associated with the hook
3699          */
3700         function setHook( $tag, $callback ) {
3701                 $oldVal = @$this->mTagHooks[$tag];
3702                 $this->mTagHooks[$tag] = $callback;
3703
3704                 return $oldVal;
3705         }
3706
3707         /**
3708          * Create a function, e.g. {{sum:1|2|3}}
3709          * The callback function should have the form:
3710          *    function myParserFunction( &$parser, $arg1, $arg2, $arg3 ) { ... }
3711          *
3712          * The callback may either return the text result of the function, or an array with the text
3713          * in element 0, and a number of flags in the other elements. The names of the flags are
3714          * specified in the keys. Valid flags are:
3715          *   found                     The text returned is valid, stop processing the template. This
3716          *                             is on by default.
3717          *   nowiki                    Wiki markup in the return value should be escaped
3718          *   noparse                   Unsafe HTML tags should not be stripped, etc.
3719          *   noargs                    Don't replace triple-brace arguments in the return value
3720          *   isHTML                    The returned text is HTML, armour it against wikitext transformation
3721          *
3722          * @public
3723          *
3724          * @param string $name The function name. Function names are case-insensitive.
3725          * @param mixed $callback The callback function (and object) to use
3726          *
3727          * @return The old callback function for this name, if any
3728          */
3729         function setFunctionHook( $name, $callback ) {
3730                 $name = strtolower( $name );
3731                 $oldVal = @$this->mFunctionHooks[$name];
3732                 $this->mFunctionHooks[$name] = $callback;
3733                 return $oldVal;
3734         }
3735
3736         /**
3737          * Replace <!--LINK--> link placeholders with actual links, in the buffer
3738          * Placeholders created in Skin::makeLinkObj()
3739          * Returns an array of links found, indexed by PDBK:
3740          *  0 - broken
3741          *  1 - normal link
3742          *  2 - stub
3743          * $options is a bit field, RLH_FOR_UPDATE to select for update
3744          */
3745         function replaceLinkHolders( &$text, $options = 0 ) {
3746                 global $wgUser;
3747                 global $wgOutputReplace;
3748
3749                 $fname = 'Parser::replaceLinkHolders';
3750                 wfProfileIn( $fname );
3751
3752                 $pdbks = array();
3753                 $colours = array();
3754                 $sk =& $this->mOptions->getSkin();
3755                 $linkCache =& LinkCache::singleton();
3756
3757                 if ( !empty( $this->mLinkHolders['namespaces'] ) ) {
3758                         wfProfileIn( $fname.'-check' );
3759                         $dbr =& wfGetDB( DB_SLAVE );
3760                         $page = $dbr->tableName( 'page' );
3761                         $threshold = $wgUser->getOption('stubthreshold');
3762
3763                         # Sort by namespace
3764                         asort( $this->mLinkHolders['namespaces'] );
3765
3766                         # Generate query
3767                         $query = false;
3768                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
3769                                 # Make title object
3770                                 $title = $this->mLinkHolders['titles'][$key];
3771
3772                                 # Skip invalid entries.
3773                                 # Result will be ugly, but prevents crash.
3774                                 if ( is_null( $title ) ) {
3775                                         continue;
3776                                 }
3777                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
3778
3779                                 # Check if it's a static known link, e.g. interwiki
3780                                 if ( $title->isAlwaysKnown() ) {
3781                                         $colours[$pdbk] = 1;
3782                                 } elseif ( ( $id = $linkCache->getGoodLinkID( $pdbk ) ) != 0 ) {
3783                                         $colours[$pdbk] = 1;
3784                                         $this->mOutput->addLink( $title, $id );
3785                                 } elseif ( $linkCache->isBadLink( $pdbk ) ) {
3786                                         $colours[$pdbk] = 0;
3787                                 } else {
3788                                         # Not in the link cache, add it to the query
3789                                         if ( !isset( $current ) ) {
3790                                                 $current = $ns;
3791                                                 $query =  "SELECT page_id, page_namespace, page_title";
3792                                                 if ( $threshold > 0 ) {
3793                                                         $query .= ', page_len, page_is_redirect';
3794                                                 }
3795                                                 $query .= " FROM $page WHERE (page_namespace=$ns AND page_title IN(";
3796                                         } elseif ( $current != $ns ) {
3797                                                 $current = $ns;
3798                                                 $query .= ")) OR (page_namespace=$ns AND page_title IN(";
3799                                         } else {
3800                                                 $query .= ', ';
3801                                         }
3802
3803                                         $query .= $dbr->addQuotes( $this->mLinkHolders['dbkeys'][$key] );
3804                                 }
3805                         }
3806                         if ( $query ) {
3807                                 $query .= '))';
3808                                 if ( $options & RLH_FOR_UPDATE ) {
3809                                         $query .= ' FOR UPDATE';
3810                                 }
3811
3812                                 $res = $dbr->query( $query, $fname );
3813
3814                                 # Fetch data and form into an associative array
3815                                 # non-existent = broken
3816                                 # 1 = known
3817                                 # 2 = stub
3818                                 while ( $s = $dbr->fetchObject($res) ) {
3819                                         $title = Title::makeTitle( $s->page_namespace, $s->page_title );
3820                                         $pdbk = $title->getPrefixedDBkey();
3821                                         $linkCache->addGoodLinkObj( $s->page_id, $title );
3822                                         $this->mOutput->addLink( $title, $s->page_id );
3823
3824                                         if ( $threshold >  0 ) {
3825                                                 $size = $s->page_len;
3826                                                 if ( $s->page_is_redirect || $s->page_namespace != 0 || $size >= $threshold ) {
3827                                                         $colours[$pdbk] = 1;
3828                                                 } else {
3829                                                         $colours[$pdbk] = 2;
3830                                                 }
3831                                         } else {
3832                                                 $colours[$pdbk] = 1;
3833                                         }
3834                                 }
3835                         }
3836                         wfProfileOut( $fname.'-check' );
3837
3838                         # Construct search and replace arrays
3839                         wfProfileIn( $fname.'-construct' );
3840                         $wgOutputReplace = array();
3841                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
3842                                 $pdbk = $pdbks[$key];
3843                                 $searchkey = "<!--LINK $key-->";
3844                                 $title = $this->mLinkHolders['titles'][$key];
3845                                 if ( empty( $colours[$pdbk] ) ) {
3846                                         $linkCache->addBadLinkObj( $title );
3847                                         $colours[$pdbk] = 0;
3848                                         $this->mOutput->addLink( $title, 0 );
3849                                         $wgOutputReplace[$searchkey] = $sk->makeBrokenLinkObj( $title,
3850                                                                         $this->mLinkHolders['texts'][$key],
3851                                                                         $this->mLinkHolders['queries'][$key] );
3852                                 } elseif ( $colours[$pdbk] == 1 ) {
3853                                         $wgOutputReplace[$searchkey] = $sk->makeKnownLinkObj( $title,
3854                                                                         $this->mLinkHolders['texts'][$key],
3855                                                                         $this->mLinkHolders['queries'][$key] );
3856                                 } elseif ( $colours[$pdbk] == 2 ) {
3857                                         $wgOutputReplace[$searchkey] = $sk->makeStubLinkObj( $title,
3858                                                                         $this->mLinkHolders['texts'][$key],
3859                                                                         $this->mLinkHolders['queries'][$key] );
3860                                 }
3861                         }
3862                         wfProfileOut( $fname.'-construct' );
3863
3864                         # Do the thing
3865                         wfProfileIn( $fname.'-replace' );
3866
3867                         $text = preg_replace_callback(
3868                                 '/(<!--LINK .*?-->)/',
3869                                 "wfOutputReplaceMatches",
3870                                 $text);
3871
3872                         wfProfileOut( $fname.'-replace' );
3873                 }
3874
3875                 # Now process interwiki link holders
3876                 # This is quite a bit simpler than internal links
3877                 if ( !empty( $this->mInterwikiLinkHolders['texts'] ) ) {
3878                         wfProfileIn( $fname.'-interwiki' );
3879                         # Make interwiki link HTML
3880                         $wgOutputReplace = array();
3881                         foreach( $this->mInterwikiLinkHolders['texts'] as $key => $link ) {
3882                                 $title = $this->mInterwikiLinkHolders['titles'][$key];
3883                                 $wgOutputReplace[$key] = $sk->makeLinkObj( $title, $link );
3884                         }
3885
3886                         $text = preg_replace_callback(
3887                                 '/<!--IWLINK (.*?)-->/',
3888                                 "wfOutputReplaceMatches",
3889                                 $text );
3890                         wfProfileOut( $fname.'-interwiki' );
3891                 }
3892
3893                 wfProfileOut( $fname );
3894                 return $colours;
3895         }
3896
3897         /**
3898          * Replace <!--LINK--> link placeholders with plain text of links
3899          * (not HTML-formatted).
3900          * @param string $text
3901          * @return string
3902          */
3903         function replaceLinkHoldersText( $text ) {
3904                 $fname = 'Parser::replaceLinkHoldersText';
3905                 wfProfileIn( $fname );
3906
3907                 $text = preg_replace_callback(
3908                         '/<!--(LINK|IWLINK) (.*?)-->/',
3909                         array( &$this, 'replaceLinkHoldersTextCallback' ),
3910                         $text );
3911
3912                 wfProfileOut( $fname );
3913                 return $text;
3914         }
3915
3916         /**
3917          * @param array $matches
3918          * @return string
3919          * @private
3920          */
3921         function replaceLinkHoldersTextCallback( $matches ) {
3922                 $type = $matches[1];
3923                 $key  = $matches[2];
3924                 if( $type == 'LINK' ) {
3925                         if( isset( $this->mLinkHolders['texts'][$key] ) ) {
3926                                 return $this->mLinkHolders['texts'][$key];
3927                         }
3928                 } elseif( $type == 'IWLINK' ) {
3929                         if( isset( $this->mInterwikiLinkHolders['texts'][$key] ) ) {
3930                                 return $this->mInterwikiLinkHolders['texts'][$key];
3931                         }
3932                 }
3933                 return $matches[0];
3934         }
3935
3936         /**
3937          * Renders an image gallery from a text with one line per image.
3938          * text labels may be given by using |-style alternative text. E.g.
3939          *   Image:one.jpg|The number "1"
3940          *   Image:tree.jpg|A tree
3941          * given as text will return the HTML of a gallery with two images,
3942          * labeled 'The number "1"' and
3943          * 'A tree'.
3944          */
3945         function renderImageGallery( $text ) {
3946                 # Setup the parser
3947                 $parserOptions = new ParserOptions;
3948                 $localParser = new Parser();
3949
3950                 $ig = new ImageGallery();
3951                 $ig->setShowBytes( false );
3952                 $ig->setShowFilename( false );
3953                 $ig->setParsing();
3954                 $lines = explode( "\n", $text );
3955
3956                 foreach ( $lines as $line ) {
3957                         # match lines like these:
3958                         # Image:someimage.jpg|This is some image
3959                         preg_match( "/^([^|]+)(\\|(.*))?$/", $line, $matches );
3960                         # Skip empty lines
3961                         if ( count( $matches ) == 0 ) {
3962                                 continue;
3963                         }
3964                         $nt =& Title::newFromText( $matches[1] );
3965                         if( is_null( $nt ) ) {
3966                                 # Bogus title. Ignore these so we don't bomb out later.
3967                                 continue;
3968                         }
3969                         if ( isset( $matches[3] ) ) {
3970                                 $label = $matches[3];
3971                         } else {
3972                                 $label = '';
3973                         }
3974
3975                         $pout = $localParser->parse( $label , $this->mTitle, $parserOptions );
3976                         $html = $pout->getText();
3977
3978                         $ig->add( new Image( $nt ), $html );
3979
3980                         # Only add real images (bug #5586)
3981                         if ( $nt->getNamespace() == NS_IMAGE ) {
3982                                 $this->mOutput->addImage( $nt->getDBkey() );
3983                         }
3984
3985                         # Register links with the parent parser
3986                         foreach( $pout->getLinks() as $ns => $keys ) {
3987                                 foreach( $keys as $dbk => $id )
3988                                         $this->mOutput->addLink( Title::makeTitle( $ns, $dbk ), $id );
3989                         }
3990
3991                 }
3992                 return $ig->toHTML();
3993         }
3994
3995         /**
3996          * Parse image options text and use it to make an image
3997          */
3998         function makeImage( &$nt, $options ) {
3999                 global $wgUseImageResize;
4000
4001                 $align = '';
4002
4003                 # Check if the options text is of the form "options|alt text"
4004                 # Options are:
4005                 #  * thumbnail          make a thumbnail with enlarge-icon and caption, alignment depends on lang
4006                 #  * left               no resizing, just left align. label is used for alt= only
4007                 #  * right              same, but right aligned
4008                 #  * none               same, but not aligned
4009                 #  * ___px              scale to ___ pixels width, no aligning. e.g. use in taxobox
4010                 #  * center             center the image
4011                 #  * framed             Keep original image size, no magnify-button.
4012
4013                 $part = explode( '|', $options);
4014
4015                 $mwThumb  =& MagicWord::get( MAG_IMG_THUMBNAIL );
4016                 $mwManualThumb =& MagicWord::get( MAG_IMG_MANUALTHUMB );
4017                 $mwLeft   =& MagicWord::get( MAG_IMG_LEFT );
4018                 $mwRight  =& MagicWord::get( MAG_IMG_RIGHT );
4019                 $mwNone   =& MagicWord::get( MAG_IMG_NONE );
4020                 $mwWidth  =& MagicWord::get( MAG_IMG_WIDTH );
4021                 $mwCenter =& MagicWord::get( MAG_IMG_CENTER );
4022                 $mwFramed =& MagicWord::get( MAG_IMG_FRAMED );
4023                 $caption = '';
4024
4025                 $width = $height = $framed = $thumb = false;
4026                 $manual_thumb = '' ;
4027
4028                 foreach( $part as $key => $val ) {
4029                         if ( $wgUseImageResize && ! is_null( $mwThumb->matchVariableStartToEnd($val) ) ) {
4030                                 $thumb=true;
4031                         } elseif ( ! is_null( $match = $mwManualThumb->matchVariableStartToEnd($val) ) ) {
4032                                 # use manually specified thumbnail
4033                                 $thumb=true;
4034                                 $manual_thumb = $match;
4035                         } elseif ( ! is_null( $mwRight->matchVariableStartToEnd($val) ) ) {
4036                                 # remember to set an alignment, don't render immediately
4037                                 $align = 'right';
4038                         } elseif ( ! is_null( $mwLeft->matchVariableStartToEnd($val) ) ) {
4039                                 # remember to set an alignment, don't render immediately
4040                                 $align = 'left';
4041                         } elseif ( ! is_null( $mwCenter->matchVariableStartToEnd($val) ) ) {
4042                                 # remember to set an alignment, don't render immediately
4043                                 $align = 'center';
4044                         } elseif ( ! is_null( $mwNone->matchVariableStartToEnd($val) ) ) {
4045                                 # remember to set an alignment, don't render immediately
4046                                 $align = 'none';
4047                         } elseif ( $wgUseImageResize && ! is_null( $match = $mwWidth->matchVariableStartToEnd($val) ) ) {
4048                                 wfDebug( "MAG_IMG_WIDTH match: $match\n" );
4049                                 # $match is the image width in pixels
4050                                 if ( preg_match( '/^([0-9]*)x([0-9]*)$/', $match, $m ) ) {
4051                                         $width = intval( $m[1] );
4052                                         $height = intval( $m[2] );
4053                                 } else {
4054                                         $width = intval($match);
4055                                 }
4056                         } elseif ( ! is_null( $mwFramed->matchVariableStartToEnd($val) ) ) {
4057                                 $framed=true;
4058                         } else {
4059                                 $caption = $val;
4060                         }
4061                 }
4062                 # Strip bad stuff out of the alt text
4063                 $alt = $this->replaceLinkHoldersText( $caption );
4064
4065                 # make sure there are no placeholders in thumbnail attributes
4066                 # that are later expanded to html- so expand them now and
4067                 # remove the tags
4068                 $alt = $this->unstrip($alt, $this->mStripState);
4069                 $alt = Sanitizer::stripAllTags( $alt );
4070
4071                 # Linker does the rest
4072                 $sk =& $this->mOptions->getSkin();
4073                 return $sk->makeImageLinkObj( $nt, $caption, $alt, $align, $width, $height, $framed, $thumb, $manual_thumb );
4074         }
4075
4076         /**
4077          * Set a flag in the output object indicating that the content is dynamic and
4078          * shouldn't be cached.
4079          */
4080         function disableCache() {
4081                 wfDebug( "Parser output marked as uncacheable.\n" );
4082                 $this->mOutput->mCacheTime = -1;
4083         }
4084
4085         /**#@+
4086          * Callback from the Sanitizer for expanding items found in HTML attribute
4087          * values, so they can be safely tested and escaped.
4088          * @param string $text
4089          * @param array $args
4090          * @return string
4091          * @private
4092          */
4093         function attributeStripCallback( &$text, $args ) {
4094                 $text = $this->replaceVariables( $text, $args );
4095                 $text = $this->unstripForHTML( $text );
4096                 return $text;
4097         }
4098
4099         function unstripForHTML( $text ) {
4100                 $text = $this->unstrip( $text, $this->mStripState );
4101                 $text = $this->unstripNoWiki( $text, $this->mStripState );
4102                 return $text;
4103         }
4104         /**#@-*/
4105
4106         /**#@+
4107          * Accessor/mutator
4108          */
4109         function Title( $x = NULL ) { return wfSetVar( $this->mTitle, $x ); }
4110         function Options( $x = NULL ) { return wfSetVar( $this->mOptions, $x ); }
4111         function OutputType( $x = NULL ) { return wfSetVar( $this->mOutputType, $x ); }
4112         /**#@-*/
4113
4114         /**#@+
4115          * Accessor
4116          */
4117         function getTags() { return array_keys( $this->mTagHooks ); }
4118         /**#@-*/
4119 }
4120
4121 /**
4122  * @todo document
4123  * @package MediaWiki
4124  */
4125 class ParserOutput
4126 {
4127         var $mText,             # The output text
4128                 $mLanguageLinks,    # List of the full text of language links, in the order they appear
4129                 $mCategories,       # Map of category names to sort keys
4130                 $mContainsOldMagic, # Boolean variable indicating if the input contained variables like {{CURRENTDAY}}
4131                 $mCacheTime,        # Time when this object was generated, or -1 for uncacheable. Used in ParserCache.
4132                 $mVersion,          # Compatibility check
4133                 $mTitleText,        # title text of the chosen language variant
4134                 $mLinks,            # 2-D map of NS/DBK to ID for the links in the document. ID=zero for broken.
4135                 $mTemplates,        # 2-D map of NS/DBK to ID for the template references. ID=zero for broken.
4136                 $mImages,           # DB keys of the images used, in the array key only
4137                 $mExternalLinks,    # External link URLs, in the key only
4138                 $mHTMLtitle,            # Display HTML title
4139                 $mSubtitle,                     # Additional subtitle
4140                 $mNewSection;           # Show a new section link?
4141
4142         function ParserOutput( $text = '', $languageLinks = array(), $categoryLinks = array(),
4143                 $containsOldMagic = false, $titletext = '' )
4144         {
4145                 $this->mText = $text;
4146                 $this->mLanguageLinks = $languageLinks;
4147                 $this->mCategories = $categoryLinks;
4148                 $this->mContainsOldMagic = $containsOldMagic;
4149                 $this->mCacheTime = '';
4150                 $this->mVersion = MW_PARSER_VERSION;
4151                 $this->mTitleText = $titletext;
4152                 $this->mLinks = array();
4153                 $this->mTemplates = array();
4154                 $this->mImages = array();
4155                 $this->mExternalLinks = array();
4156                 $this->mHTMLtitle = "" ;
4157                 $this->mSubtitle = "" ;
4158                 $this->mNewSection = false;
4159         }
4160
4161         function getText()                   { return $this->mText; }
4162         function &getLanguageLinks()          { return $this->mLanguageLinks; }
4163         function getCategoryLinks()          { return array_keys( $this->mCategories ); }
4164         function &getCategories()            { return $this->mCategories; }
4165         function getCacheTime()              { return $this->mCacheTime; }
4166         function getTitleText()              { return $this->mTitleText; }
4167         function &getLinks()                 { return $this->mLinks; }
4168         function &getTemplates()             { return $this->mTemplates; }
4169         function &getImages()                { return $this->mImages; }
4170         function &getExternalLinks()         { return $this->mExternalLinks; }
4171
4172         function containsOldMagic()          { return $this->mContainsOldMagic; }
4173         function setText( $text )            { return wfSetVar( $this->mText, $text ); }
4174         function setLanguageLinks( $ll )     { return wfSetVar( $this->mLanguageLinks, $ll ); }
4175         function setCategoryLinks( $cl )     { return wfSetVar( $this->mCategories, $cl ); }
4176         function setContainsOldMagic( $com ) { return wfSetVar( $this->mContainsOldMagic, $com ); }
4177         function setCacheTime( $t )          { return wfSetVar( $this->mCacheTime, $t ); }
4178         function setTitleText( $t )          { return wfSetVar ($this->mTitleText, $t); }
4179
4180         function addCategory( $c, $sort )    { $this->mCategories[$c] = $sort; }
4181         function addImage( $name )           { $this->mImages[$name] = 1; }
4182         function addLanguageLink( $t )       { $this->mLanguageLinks[] = $t; }
4183         function addExternalLink( $url )     { $this->mExternalLinks[$url] = 1; }
4184
4185         function setNewSection( $value ) {
4186                 $this->mNewSection = (bool)$value;
4187         }
4188         function getNewSection() {
4189                 return (bool)$this->mNewSection;
4190         }
4191
4192         function addLink( $title, $id ) {
4193                 $ns = $title->getNamespace();
4194                 $dbk = $title->getDBkey();
4195                 if ( !isset( $this->mLinks[$ns] ) ) {
4196                         $this->mLinks[$ns] = array();
4197                 }
4198                 $this->mLinks[$ns][$dbk] = $id;
4199         }
4200
4201         function addTemplate( $title, $id ) {
4202                 $ns = $title->getNamespace();
4203                 $dbk = $title->getDBkey();
4204                 if ( !isset( $this->mTemplates[$ns] ) ) {
4205                         $this->mTemplates[$ns] = array();
4206                 }
4207                 $this->mTemplates[$ns][$dbk] = $id;
4208         }
4209
4210         /**
4211          * Return true if this cached output object predates the global or
4212          * per-article cache invalidation timestamps, or if it comes from
4213          * an incompatible older version.
4214          *
4215          * @param string $touched the affected article's last touched timestamp
4216          * @return bool
4217          * @public
4218          */
4219         function expired( $touched ) {
4220                 global $wgCacheEpoch;
4221                 return $this->getCacheTime() == -1 || // parser says it's uncacheable
4222                        $this->getCacheTime() < $touched ||
4223                        $this->getCacheTime() <= $wgCacheEpoch ||
4224                        !isset( $this->mVersion ) ||
4225                        version_compare( $this->mVersion, MW_PARSER_VERSION, "lt" );
4226         }
4227 }
4228
4229 /**
4230  * Set options of the Parser
4231  * @todo document
4232  * @package MediaWiki
4233  */
4234 class ParserOptions
4235 {
4236         # All variables are private
4237         var $mUseTeX;                    # Use texvc to expand <math> tags
4238         var $mUseDynamicDates;           # Use DateFormatter to format dates
4239         var $mInterwikiMagic;            # Interlanguage links are removed and returned in an array
4240         var $mAllowExternalImages;       # Allow external images inline
4241         var $mAllowExternalImagesFrom;   # If not, any exception?
4242         var $mSkin;                      # Reference to the preferred skin
4243         var $mDateFormat;                # Date format index
4244         var $mEditSection;               # Create "edit section" links
4245         var $mNumberHeadings;            # Automatically number headings
4246         var $mAllowSpecialInclusion;     # Allow inclusion of special pages
4247         var $mTidy;                      # Ask for tidy cleanup
4248         var $mInterfaceMessage;          # Which lang to call for PLURAL and GRAMMAR
4249
4250         function getUseTeX()                        { return $this->mUseTeX; }
4251         function getUseDynamicDates()               { return $this->mUseDynamicDates; }
4252         function getInterwikiMagic()                { return $this->mInterwikiMagic; }
4253         function getAllowExternalImages()           { return $this->mAllowExternalImages; }
4254         function getAllowExternalImagesFrom()       { return $this->mAllowExternalImagesFrom; }
4255         function &getSkin()                         { return $this->mSkin; }
4256         function getDateFormat()                    { return $this->mDateFormat; }
4257         function getEditSection()                   { return $this->mEditSection; }
4258         function getNumberHeadings()                { return $this->mNumberHeadings; }
4259         function getAllowSpecialInclusion()         { return $this->mAllowSpecialInclusion; }
4260         function getTidy()                          { return $this->mTidy; }
4261         function getInterfaceMessage()              { return $this->mInterfaceMessage; }
4262
4263         function setUseTeX( $x )                    { return wfSetVar( $this->mUseTeX, $x ); }
4264         function setUseDynamicDates( $x )           { return wfSetVar( $this->mUseDynamicDates, $x ); }
4265         function setInterwikiMagic( $x )            { return wfSetVar( $this->mInterwikiMagic, $x ); }
4266         function setAllowExternalImages( $x )       { return wfSetVar( $this->mAllowExternalImages, $x ); }
4267         function setAllowExternalImagesFrom( $x )   { return wfSetVar( $this->mAllowExternalImagesFrom, $x ); }
4268         function setDateFormat( $x )                { return wfSetVar( $this->mDateFormat, $x ); }
4269         function setEditSection( $x )               { return wfSetVar( $this->mEditSection, $x ); }
4270         function setNumberHeadings( $x )            { return wfSetVar( $this->mNumberHeadings, $x ); }
4271         function setAllowSpecialInclusion( $x )     { return wfSetVar( $this->mAllowSpecialInclusion, $x ); }
4272         function setTidy( $x )                      { return wfSetVar( $this->mTidy, $x); }
4273         function setSkin( &$x ) { $this->mSkin =& $x; }
4274         function setInterfaceMessage( $x )          { return wfSetVar( $this->mInterfaceMessage, $x); }
4275
4276         function ParserOptions() {
4277                 global $wgUser;
4278                 $this->initialiseFromUser( $wgUser );
4279         }
4280
4281         /**
4282          * Get parser options
4283          * @static
4284          */
4285         function newFromUser( &$user ) {
4286                 $popts = new ParserOptions;
4287                 $popts->initialiseFromUser( $user );
4288                 return $popts;
4289         }
4290
4291         /** Get user options */
4292         function initialiseFromUser( &$userInput ) {
4293                 global $wgUseTeX, $wgUseDynamicDates, $wgInterwikiMagic, $wgAllowExternalImages;
4294                 global $wgAllowExternalImagesFrom, $wgAllowSpecialInclusion;
4295                 $fname = 'ParserOptions::initialiseFromUser';
4296                 wfProfileIn( $fname );
4297                 if ( !$userInput ) {
4298                         $user = new User;
4299                         $user->setLoaded( true );
4300                 } else {
4301                         $user =& $userInput;
4302                 }
4303
4304                 $this->mUseTeX = $wgUseTeX;
4305                 $this->mUseDynamicDates = $wgUseDynamicDates;
4306                 $this->mInterwikiMagic = $wgInterwikiMagic;
4307                 $this->mAllowExternalImages = $wgAllowExternalImages;
4308                 $this->mAllowExternalImagesFrom = $wgAllowExternalImagesFrom;
4309                 wfProfileIn( $fname.'-skin' );
4310                 $this->mSkin =& $user->getSkin();
4311                 wfProfileOut( $fname.'-skin' );
4312                 $this->mDateFormat = $user->getOption( 'date' );
4313                 $this->mEditSection = true;
4314                 $this->mNumberHeadings = $user->getOption( 'numberheadings' );
4315                 $this->mAllowSpecialInclusion = $wgAllowSpecialInclusion;
4316                 $this->mTidy = false;
4317                 $this->mInterfaceMessage = false;
4318                 wfProfileOut( $fname );
4319         }
4320 }
4321
4322 /**
4323  * Callback function used by Parser::replaceLinkHolders()
4324  * to substitute link placeholders.
4325  */
4326 function &wfOutputReplaceMatches( $matches ) {
4327         global $wgOutputReplace;
4328         return $wgOutputReplace[$matches[1]];
4329 }
4330
4331 /**
4332  * Return the total number of articles
4333  */
4334 function wfNumberOfArticles() {
4335         global $wgNumberOfArticles;
4336
4337         wfLoadSiteStats();
4338         return $wgNumberOfArticles;
4339 }
4340
4341 /**
4342  * Return the number of files
4343  */
4344 function wfNumberOfFiles() {
4345         $fname = 'wfNumberOfFiles';
4346
4347         wfProfileIn( $fname );
4348         $dbr =& wfGetDB( DB_SLAVE );
4349         $numImages = $dbr->selectField('site_stats', 'ss_images', array(), $fname );
4350         wfProfileOut( $fname );
4351
4352         return $numImages;
4353 }
4354
4355 /**
4356  * Return the number of user accounts
4357  * @return integer
4358  */
4359 function wfNumberOfUsers() {
4360         wfProfileIn( 'wfNumberOfUsers' );
4361         $dbr =& wfGetDB( DB_SLAVE );
4362         $count = $dbr->selectField( 'site_stats', 'ss_users', array(), 'wfNumberOfUsers' );
4363         wfProfileOut( 'wfNumberOfUsers' );
4364         return (int)$count;
4365 }
4366
4367 /**
4368  * Return the total number of pages
4369  * @return integer
4370  */
4371 function wfNumberOfPages() {
4372         wfProfileIn( 'wfNumberOfPages' );
4373         $dbr =& wfGetDB( DB_SLAVE );
4374         $count = $dbr->selectField( 'site_stats', 'ss_total_pages', array(), 'wfNumberOfPages' );
4375         wfProfileOut( 'wfNumberOfPages' );
4376         return (int)$count;
4377 }
4378
4379 /**
4380  * Get various statistics from the database
4381  * @private
4382  */
4383 function wfLoadSiteStats() {
4384         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
4385         $fname = 'wfLoadSiteStats';
4386
4387         if ( -1 != $wgNumberOfArticles ) return;
4388         $dbr =& wfGetDB( DB_SLAVE );
4389         $s = $dbr->selectRow( 'site_stats',
4390                 array( 'ss_total_views', 'ss_total_edits', 'ss_good_articles' ),
4391                 array( 'ss_row_id' => 1 ), $fname
4392         );
4393
4394         if ( $s === false ) {
4395                 return;
4396         } else {
4397                 $wgTotalViews = $s->ss_total_views;
4398                 $wgTotalEdits = $s->ss_total_edits;
4399                 $wgNumberOfArticles = $s->ss_good_articles;
4400         }
4401 }
4402
4403 /**
4404  * Escape html tags
4405  * Basically replacing " > and < with HTML entities ( &quot;, &gt;, &lt;)
4406  *
4407  * @param $in String: text that might contain HTML tags.
4408  * @return string Escaped string
4409  */
4410 function wfEscapeHTMLTagsOnly( $in ) {
4411         return str_replace(
4412                 array( '"', '>', '<' ),
4413                 array( '&quot;', '&gt;', '&lt;' ),
4414                 $in );
4415 }
4416
4417 ?>