includes/Parser.php

   1 <?php
   2
   3 /**
   4  *
   5  * File for Parser and related classes
   6  *
   7  * @addtogroup Parser
   8  */
   9
  10
  11 /**
  12  * PHP Parser - Processes wiki markup (which uses a more user-friendly
  13  * syntax, such as "[[link]]" for making links), and provides a one-way
  14  * transformation of that wiki markup it into XHTML output / markup
  15  * (which in turn the browser understands, and can display).
  16  *
  17  * <pre>
  18  * There are four main entry points into the Parser class:
  19  * parse()
  20  *   produces HTML output
  21  * preSaveTransform().
  22  *   produces altered wiki markup.
  23  * transformMsg()
  24  *   performs brace substitution on MediaWiki messages
  25  * preprocess()
  26  *   removes HTML comments and expands templates
  27  *
  28  * Globals used:
  29  *    objects:   $wgLang, $wgContLang
  30  *
  31  * NOT $wgArticle, $wgUser or $wgTitle. Keep them away!
  32  *
  33  * settings:
  34  *  $wgUseTex*, $wgUseDynamicDates*, $wgInterwikiMagic*,
  35  *  $wgNamespacesWithSubpages, $wgAllowExternalImages*,
  36  *  $wgLocaltimezone, $wgAllowSpecialInclusion*,
  37  *  $wgMaxArticleSize*
  38  *
  39  *  * only within ParserOptions
  40  * </pre>
  41  *
  42  * @addtogroup Parser
  43  */
  44 class Parser
  45 {
  46         /**
  47          * Update this version number when the ParserOutput format
  48          * changes in an incompatible way, so the parser cache
  49          * can automatically discard old data.
  50          */
  51         const VERSION = '1.6.4';
  52
  53         # Flags for Parser::setFunctionHook
  54         # Also available as global constants from Defines.php
  55         const SFH_NO_HASH = 1;
  56         const SFH_OBJECT_ARGS = 2;
  57
  58         # Constants needed for external link processing
  59         # Everything except bracket, space, or control characters
  60         const EXT_LINK_URL_CLASS = '[^][<>"\\x00-\\x20\\x7F]';
  61         const EXT_IMAGE_REGEX = '/^(http:\/\/|https:\/\/)([^][<>"\\x00-\\x20\\x7F]+)
  62                 \\/([A-Za-z0-9_.,~%\\-+&;#*?!=()@\\x80-\\xFF]+)\\.((?i)gif|png|jpg|jpeg)$/Sx';
  63
  64         // State constants for the definition list colon extraction
  65         const COLON_STATE_TEXT = 0;
  66         const COLON_STATE_TAG = 1;
  67         const COLON_STATE_TAGSTART = 2;
  68         const COLON_STATE_CLOSETAG = 3;
  69         const COLON_STATE_TAGSLASH = 4;
  70         const COLON_STATE_COMMENT = 5;
  71         const COLON_STATE_COMMENTDASH = 6;
  72         const COLON_STATE_COMMENTDASHDASH = 7;
  73
  74         // Flags for preprocessToDom
  75         const PTD_FOR_INCLUSION = 1;
  76
  77         /**#@+
  78          * @private
  79          */
  80         # Persistent:
  81         var $mTagHooks, $mTransparentTagHooks, $mFunctionHooks, $mFunctionSynonyms, $mVariables,
  82                 $mImageParams, $mImageParamsMagicArray, $mStripList, $mMarkerSuffix,
  83                 $mExtLinkBracketedRegex;
  84
  85         # Cleared with clearState():
  86         var $mOutput, $mAutonumber, $mDTopen, $mStripState;
  87         var $mIncludeCount, $mArgStack, $mLastSection, $mInPre;
  88         var $mInterwikiLinkHolders, $mLinkHolders;
  89         var $mIncludeSizes, $mPPNodeCount, $mDefaultSort;
  90         var $mTplExpandCache,// empty-frame expansion cache
  91             $mTemplatePath;     // stores an unsorted hash of all the templates already loaded
  92                                 // in this path. Used for loop detection.
  93         var $mTplRedirCache, $mTplDomCache, $mHeadings;
  94
  95         # Temporary
  96         # These are variables reset at least once per parse regardless of $clearState
  97         var $mOptions,      // ParserOptions object
  98                 $mTitle,        // Title context, used for self-link rendering and similar things
  99                 $mOutputType,   // Output type, one of the OT_xxx constants
 100                 $ot,            // Shortcut alias, see setOutputType()
 101                 $mRevisionId,   // ID to display in {{REVISIONID}} tags
 102                 $mRevisionTimestamp, // The timestamp of the specified revision ID
 103                 $mRevIdForTs;   // The revision ID which was used to fetch the timestamp
 104
 105         /**#@-*/
 106
 107         /**
 108          * Constructor
 109          *
 110          * @public
 111          */
 112         function __construct( $conf = array() ) {
 113                 $this->mTagHooks = array();
 114                 $this->mTransparentTagHooks = array();
 115                 $this->mFunctionHooks = array();
 116                 $this->mFunctionSynonyms = array( 0 => array(), 1 => array() );
 117                 $this->mStripList = array( 'nowiki', 'gallery' );
 118                 $this->mMarkerSuffix = "-QINU\x7f";
 119                 $this->mExtLinkBracketedRegex = '/\[(\b(' . wfUrlProtocols() . ')'.
 120                         '[^][<>"\\x00-\\x20\\x7F]+) *([^\]\\x0a\\x0d]*?)\]/S';
 121                 $this->mFirstCall = true;
 122         }
 123
 124         /**
 125          * Do various kinds of initialisation on the first call of the parser
 126          */
 127         function firstCallInit() {
 128                 if ( !$this->mFirstCall ) {
 129                         return;
 130                 }
 131
 132                 wfProfileIn( __METHOD__ );
 133                 global $wgAllowDisplayTitle, $wgAllowSlowParserFunctions;
 134
 135                 $this->setHook( 'pre', array( $this, 'renderPreTag' ) );
 136
 137                 # Syntax for arguments (see self::setFunctionHook):
 138                 #  "name for lookup in localized magic words array",
 139                 #  function callback,
 140                 #  optional SFH_NO_HASH to omit the hash from calls (e.g. {{int:...}
 141                 #    instead of {{#int:...}})
 142                 $this->setFunctionHook( 'int',              array( 'CoreParserFunctions', 'intFunction'      ), SFH_NO_HASH );
 143                 $this->setFunctionHook( 'ns',               array( 'CoreParserFunctions', 'ns'               ), SFH_NO_HASH );
 144                 $this->setFunctionHook( 'urlencode',        array( 'CoreParserFunctions', 'urlencode'        ), SFH_NO_HASH );
 145                 $this->setFunctionHook( 'lcfirst',          array( 'CoreParserFunctions', 'lcfirst'          ), SFH_NO_HASH );
 146                 $this->setFunctionHook( 'ucfirst',          array( 'CoreParserFunctions', 'ucfirst'          ), SFH_NO_HASH );
 147                 $this->setFunctionHook( 'lc',               array( 'CoreParserFunctions', 'lc'               ), SFH_NO_HASH );
 148                 $this->setFunctionHook( 'uc',               array( 'CoreParserFunctions', 'uc'               ), SFH_NO_HASH );
 149                 $this->setFunctionHook( 'localurl',         array( 'CoreParserFunctions', 'localurl'         ), SFH_NO_HASH );
 150                 $this->setFunctionHook( 'localurle',        array( 'CoreParserFunctions', 'localurle'        ), SFH_NO_HASH );
 151                 $this->setFunctionHook( 'fullurl',          array( 'CoreParserFunctions', 'fullurl'          ), SFH_NO_HASH );
 152                 $this->setFunctionHook( 'fullurle',         array( 'CoreParserFunctions', 'fullurle'         ), SFH_NO_HASH );
 153                 $this->setFunctionHook( 'formatnum',        array( 'CoreParserFunctions', 'formatnum'        ), SFH_NO_HASH );
 154                 $this->setFunctionHook( 'grammar',          array( 'CoreParserFunctions', 'grammar'          ), SFH_NO_HASH );
 155                 $this->setFunctionHook( 'plural',           array( 'CoreParserFunctions', 'plural'           ), SFH_NO_HASH );
 156                 $this->setFunctionHook( 'numberofpages',    array( 'CoreParserFunctions', 'numberofpages'    ), SFH_NO_HASH );
 157                 $this->setFunctionHook( 'numberofusers',    array( 'CoreParserFunctions', 'numberofusers'    ), SFH_NO_HASH );
 158                 $this->setFunctionHook( 'numberofarticles', array( 'CoreParserFunctions', 'numberofarticles' ), SFH_NO_HASH );
 159                 $this->setFunctionHook( 'numberoffiles',    array( 'CoreParserFunctions', 'numberoffiles'    ), SFH_NO_HASH );
 160                 $this->setFunctionHook( 'numberofadmins',   array( 'CoreParserFunctions', 'numberofadmins'   ), SFH_NO_HASH );
 161                 $this->setFunctionHook( 'numberofedits',    array( 'CoreParserFunctions', 'numberofedits'    ), SFH_NO_HASH );
 162                 $this->setFunctionHook( 'language',         array( 'CoreParserFunctions', 'language'         ), SFH_NO_HASH );
 163                 $this->setFunctionHook( 'padleft',          array( 'CoreParserFunctions', 'padleft'          ), SFH_NO_HASH );
 164                 $this->setFunctionHook( 'padright',         array( 'CoreParserFunctions', 'padright'         ), SFH_NO_HASH );
 165                 $this->setFunctionHook( 'anchorencode',     array( 'CoreParserFunctions', 'anchorencode'     ), SFH_NO_HASH );
 166                 $this->setFunctionHook( 'special',          array( 'CoreParserFunctions', 'special'          ) );
 167                 $this->setFunctionHook( 'defaultsort',      array( 'CoreParserFunctions', 'defaultsort'      ), SFH_NO_HASH );
 168                 $this->setFunctionHook( 'filepath',         array( 'CoreParserFunctions', 'filepath'         ), SFH_NO_HASH );
 169
 170                 if ( $wgAllowDisplayTitle ) {
 171                         $this->setFunctionHook( 'displaytitle', array( 'CoreParserFunctions', 'displaytitle' ), SFH_NO_HASH );
 172                 }
 173                 if ( $wgAllowSlowParserFunctions ) {
 174                         $this->setFunctionHook( 'pagesinnamespace', array( 'CoreParserFunctions', 'pagesinnamespace' ), SFH_NO_HASH );
 175                 }
 176
 177                 $this->initialiseVariables();
 178                 $this->mFirstCall = false;
 179                 wfProfileOut( __METHOD__ );
 180         }
 181
 182         /**
 183          * Clear Parser state
 184          *
 185          * @private
 186          */
 187         function clearState() {
 188                 wfProfileIn( __METHOD__ );
 189                 if ( $this->mFirstCall ) {
 190                         $this->firstCallInit();
 191                 }
 192                 $this->mOutput = new ParserOutput;
 193                 $this->mAutonumber = 0;
 194                 $this->mLastSection = '';
 195                 $this->mDTopen = false;
 196                 $this->mIncludeCount = array();
 197                 $this->mStripState = new StripState;
 198                 $this->mArgStack = false;
 199                 $this->mInPre = false;
 200                 $this->mInterwikiLinkHolders = array(
 201                         'texts' => array(),
 202                         'titles' => array()
 203                 );
 204                 $this->mLinkHolders = array(
 205                         'namespaces' => array(),
 206                         'dbkeys' => array(),
 207                         'queries' => array(),
 208                         'texts' => array(),
 209                         'titles' => array()
 210                 );
 211                 $this->mRevisionTimestamp = $this->mRevisionId = null;
 212
 213                 /**
 214                  * Prefix for temporary replacement strings for the multipass parser.
 215                  * \x07 should never appear in input as it's disallowed in XML.
 216                  * Using it at the front also gives us a little extra robustness
 217                  * since it shouldn't match when butted up against identifier-like
 218                  * string constructs.
 219                  *
 220                  * Must not consist of all title characters, or else it will change
 221                  * the behaviour of <nowiki> in a link.
 222                  */
 223                 #$this->mUniqPrefix = "\x07UNIQ" . Parser::getRandomString();
 224                 $this->mUniqPrefix = "\x7fUNIQ" . Parser::getRandomString();
 225
 226                 # Clear these on every parse, bug 4549
 227                 $this->mTemplatePath = array();
 228                 $this->mTplExpandCache = $this->mTplRedirCache = $this->mTplDomCache = array();
 229
 230                 $this->mShowToc = true;
 231                 $this->mForceTocPosition = false;
 232                 $this->mIncludeSizes = array(
 233                         'post-expand' => 0,
 234                         'arg' => 0,
 235                 );
 236                 $this->mPPNodeCount = 0;
 237                 $this->mDefaultSort = false;
 238                 $this->mHeadings = array();
 239
 240                 wfRunHooks( 'ParserClearState', array( &$this ) );
 241                 wfProfileOut( __METHOD__ );
 242         }
 243
 244         function setOutputType( $ot ) {
 245                 $this->mOutputType = $ot;
 246                 // Shortcut alias
 247                 $this->ot = array(
 248                         'html' => $ot == OT_HTML,
 249                         'wiki' => $ot == OT_WIKI,
 250                         'msg' => $ot == OT_MSG,
 251                         'pre' => $ot == OT_PREPROCESS,
 252                 );
 253         }
 254
 255         /**
 256          * Accessor for mUniqPrefix.
 257          *
 258          * @public
 259          */
 260         function uniqPrefix() {
 261                 if( !isset( $this->mUniqPrefix ) ) {
 262                         // @fixme this is probably *horribly wrong*
 263                         // LanguageConverter seems to want $wgParser's uniqPrefix, however
 264                         // if this is called for a parser cache hit, the parser may not
 265                         // have ever been initialized in the first place.
 266                         // Not really sure what the heck is supposed to be going on here.
 267                         return '';
 268                         //throw new MWException( "Accessing uninitialized mUniqPrefix" );
 269                 }
 270                 return $this->mUniqPrefix;
 271         }
 272
 273         /**
 274          * Convert wikitext to HTML
 275          * Do not call this function recursively.
 276          *
 277          * @param string $text Text we want to parse
 278          * @param Title &$title A title object
 279          * @param array $options
 280          * @param boolean $linestart
 281          * @param boolean $clearState
 282          * @param int $revid number to pass in {{REVISIONID}}
 283          * @return ParserOutput a ParserOutput
 284          */
 285         public function parse( $text, &$title, $options, $linestart = true, $clearState = true, $revid = null ) {
 286                 /**
 287                  * First pass--just handle <nowiki> sections, pass the rest off
 288                  * to internalParse() which does all the real work.
 289                  */
 290
 291                 global $wgUseTidy, $wgAlwaysUseTidy, $wgContLang;
 292                 $fname = 'Parser::parse-' . wfGetCaller();
 293                 wfProfileIn( __METHOD__ );
 294                 wfProfileIn( $fname );
 295
 296                 if ( $clearState ) {
 297                         $this->clearState();
 298                 }
 299
 300                 $this->mOptions = $options;
 301                 $this->mTitle =& $title;
 302                 $oldRevisionId = $this->mRevisionId;
 303                 $oldRevisionTimestamp = $this->mRevisionTimestamp;
 304                 if( $revid !== null ) {
 305                         $this->mRevisionId = $revid;
 306                         $this->mRevisionTimestamp = null;
 307                 }
 308                 $this->setOutputType( OT_HTML );
 309                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$this->mStripState ) );
 310                 # No more strip!
 311                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$this->mStripState ) );
 312                 $text = $this->internalParse( $text );
 313                 $text = $this->mStripState->unstripGeneral( $text );
 314
 315                 # Clean up special characters, only run once, next-to-last before doBlockLevels
 316                 $fixtags = array(
 317                         # french spaces, last one Guillemet-left
 318                         # only if there is something before the space
 319                         '/(.) (?=\\?|:|;|!|%|\\302\\273)/' => '\\1&nbsp;\\2',
 320                         # french spaces, Guillemet-right
 321                         '/(\\302\\253) /' => '\\1&nbsp;',
 322                 );
 323                 $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 324
 325                 # only once and last
 326                 $text = $this->doBlockLevels( $text, $linestart );
 327
 328                 $this->replaceLinkHolders( $text );
 329
 330                 # the position of the parserConvert() call should not be changed. it
 331                 # assumes that the links are all replaced and the only thing left
 332                 # is the <nowiki> mark.
 333                 # Side-effects: this calls $this->mOutput->setTitleText()
 334                 $text = $wgContLang->parserConvert( $text, $this );
 335
 336                 $text = $this->mStripState->unstripNoWiki( $text );
 337
 338                 wfRunHooks( 'ParserBeforeTidy', array( &$this, &$text ) );
 339
 340 //!JF Move to its own function
 341
 342                 $uniq_prefix = $this->mUniqPrefix;
 343                 $matches = array();
 344                 $elements = array_keys( $this->mTransparentTagHooks );
 345                 $text = Parser::extractTagsAndParams( $elements, $text, $matches, $uniq_prefix );
 346
 347                 foreach( $matches as $marker => $data ) {
 348                         list( $element, $content, $params, $tag ) = $data;
 349                         $tagName = strtolower( $element );
 350                         if( isset( $this->mTransparentTagHooks[$tagName] ) ) {
 351                                 $output = call_user_func_array( $this->mTransparentTagHooks[$tagName],
 352                                         array( $content, $params, $this ) );
 353                         } else {
 354                                 $output = $tag;
 355                         }
 356                         $this->mStripState->general->setPair( $marker, $output );
 357                 }
 358                 $text = $this->mStripState->unstripGeneral( $text );
 359
 360                 $text = Sanitizer::normalizeCharReferences( $text );
 361
 362                 if (($wgUseTidy and $this->mOptions->mTidy) or $wgAlwaysUseTidy) {
 363                         $text = Parser::tidy($text);
 364                 } else {
 365                         # attempt to sanitize at least some nesting problems
 366                         # (bug #2702 and quite a few others)
 367                         $tidyregs = array(
 368                                 # ''Something [http://www.cool.com cool''] -->
 369                                 # <i>Something</i><a href="http://www.cool.com"..><i>cool></i></a>
 370                                 '/(<([bi])>)(<([bi])>)?([^<]*)(<\/?a[^<]*>)([^<]*)(<\/\\4>)?(<\/\\2>)/' =>
 371                                 '\\1\\3\\5\\8\\9\\6\\1\\3\\7\\8\\9',
 372                                 # fix up an anchor inside another anchor, only
 373                                 # at least for a single single nested link (bug 3695)
 374                                 '/(<a[^>]+>)([^<]*)(<a[^>]+>[^<]*)<\/a>(.*)<\/a>/' =>
 375                                 '\\1\\2</a>\\3</a>\\1\\4</a>',
 376                                 # fix div inside inline elements- doBlockLevels won't wrap a line which
 377                                 # contains a div, so fix it up here; replace
 378                                 # div with escaped text
 379                                 '/(<([aib]) [^>]+>)([^<]*)(<div([^>]*)>)(.*)(<\/div>)([^<]*)(<\/\\2>)/' =>
 380                                 '\\1\\3&lt;div\\5&gt;\\6&lt;/div&gt;\\8\\9',
 381                                 # remove empty italic or bold tag pairs, some
 382                                 # introduced by rules above
 383                                 '/<([bi])><\/\\1>/' => '',
 384                         );
 385
 386                         $text = preg_replace(
 387                                 array_keys( $tidyregs ),
 388                                 array_values( $tidyregs ),
 389                                 $text );
 390                 }
 391
 392                 wfRunHooks( 'ParserAfterTidy', array( &$this, &$text ) );
 393
 394                 # Information on include size limits, for the benefit of users who try to skirt them
 395                 if ( $this->mOptions->getEnableLimitReport() ) {
 396                         $max = $this->mOptions->getMaxIncludeSize();
 397                         $limitReport =
 398                                 "Preprocessor node count: {$this->mPPNodeCount}/{$this->mOptions->mMaxPPNodeCount}\n" .
 399                                 "Post-expand include size: {$this->mIncludeSizes['post-expand']}/$max bytes\n" .
 400                                 "Template argument size: {$this->mIncludeSizes['arg']}/$max bytes\n";
 401                         wfRunHooks( 'ParserLimitReport', array( $this, &$limitReport ) );
 402                         $text .= "\n<!-- \n$limitReport-->\n";
 403                 }
 404                 $this->mOutput->setText( $text );
 405                 $this->mRevisionId = $oldRevisionId;
 406                 $this->mRevisionTimestamp = $oldRevisionTimestamp;
 407                 wfProfileOut( $fname );
 408                 wfProfileOut( __METHOD__ );
 409
 410                 return $this->mOutput;
 411         }
 412
 413         /**
 414          * Recursive parser entry point that can be called from an extension tag
 415          * hook.
 416          */
 417         function recursiveTagParse( $text ) {
 418                 wfProfileIn( __METHOD__ );
 419                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$this->mStripState ) );
 420                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$this->mStripState ) );
 421                 $text = $this->internalParse( $text );
 422                 wfProfileOut( __METHOD__ );
 423                 return $text;
 424         }
 425
 426         /**
 427          * Expand templates and variables in the text, producing valid, static wikitext.
 428          * Also removes comments.
 429          */
 430         function preprocess( $text, $title, $options, $revid = null ) {
 431                 wfProfileIn( __METHOD__ );
 432                 $this->clearState();
 433                 $this->setOutputType( OT_PREPROCESS );
 434                 $this->mOptions = $options;
 435                 $this->mTitle = $title;
 436                 if( $revid !== null ) {
 437                         $this->mRevisionId = $revid;
 438                 }
 439                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$this->mStripState ) );
 440                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$this->mStripState ) );
 441                 $text = $this->replaceVariables( $text );
 442                 if ( $this->mOptions->getRemoveComments() ) {
 443                         $text = Sanitizer::removeHTMLcomments( $text );
 444                 }
 445                 $text = $this->mStripState->unstripBoth( $text );
 446                 wfProfileOut( __METHOD__ );
 447                 return $text;
 448         }
 449
 450         /**
 451          * Get a random string
 452          *
 453          * @private
 454          * @static
 455          */
 456         function getRandomString() {
 457                 return dechex(mt_rand(0, 0x7fffffff)) . dechex(mt_rand(0, 0x7fffffff));
 458         }
 459
 460         function &getTitle() { return $this->mTitle; }
 461         function getOptions() { return $this->mOptions; }
 462
 463         function getFunctionLang() {
 464                 global $wgLang, $wgContLang;
 465                 return $this->mOptions->getInterfaceMessage() ? $wgLang : $wgContLang;
 466         }
 467
 468         /**
 469          * Replaces all occurrences of HTML-style comments and the given tags
 470          * in the text with a random marker and returns teh next text. The output
 471          * parameter $matches will be an associative array filled with data in
 472          * the form:
 473          *   'UNIQ-xxxxx' => array(
 474          *     'element',
 475          *     'tag content',
 476          *     array( 'param' => 'x' ),
 477          *     '<element param="x">tag content</element>' ) )
 478          *
 479          * @param $elements list of element names. Comments are always extracted.
 480          * @param $text Source text string.
 481          * @param $uniq_prefix
 482          *
 483          * @public
 484          * @static
 485          */
 486         function extractTagsAndParams($elements, $text, &$matches, $uniq_prefix = ''){
 487                 static $n = 1;
 488                 $stripped = '';
 489                 $matches = array();
 490
 491                 $taglist = implode( '|', $elements );
 492                 $start = "/<($taglist)(\\s+[^>]*?|\\s*?)(\/?>)|<(!--)/i";
 493
 494                 while ( '' != $text ) {
 495                         $p = preg_split( $start, $text, 2, PREG_SPLIT_DELIM_CAPTURE );
 496                         $stripped .= $p[0];
 497                         if( count( $p ) < 5 ) {
 498                                 break;
 499                         }
 500                         if( count( $p ) > 5 ) {
 501                                 // comment
 502                                 $element    = $p[4];
 503                                 $attributes = '';
 504                                 $close      = '';
 505                                 $inside     = $p[5];
 506                         } else {
 507                                 // tag
 508                                 $element    = $p[1];
 509                                 $attributes = $p[2];
 510                                 $close      = $p[3];
 511                                 $inside     = $p[4];
 512                         }
 513
 514                         $marker = "$uniq_prefix-$element-" . sprintf('%08X', $n++) . $this->mMarkerSuffix;
 515                         $stripped .= $marker;
 516
 517                         if ( $close === '/>' ) {
 518                                 // Empty element tag, <tag />
 519                                 $content = null;
 520                                 $text = $inside;
 521                                 $tail = null;
 522                         } else {
 523                                 if( $element == '!--' ) {
 524                                         $end = '/(-->)/';
 525                                 } else {
 526                                         $end = "/(<\\/$element\\s*>)/i";
 527                                 }
 528                                 $q = preg_split( $end, $inside, 2, PREG_SPLIT_DELIM_CAPTURE );
 529                                 $content = $q[0];
 530                                 if( count( $q ) < 3 ) {
 531                                         # No end tag -- let it run out to the end of the text.
 532                                         $tail = '';
 533                                         $text = '';
 534                                 } else {
 535                                         $tail = $q[1];
 536                                         $text = $q[2];
 537                                 }
 538                         }
 539
 540                         $matches[$marker] = array( $element,
 541                                 $content,
 542                                 Sanitizer::decodeTagAttributes( $attributes ),
 543                                 "<$element$attributes$close$content$tail" );
 544                 }
 545                 return $stripped;
 546         }
 547
 548         /**
 549          * Get a list of strippable XML-like elements
 550          */
 551         function getStripList() {
 552                 global $wgRawHtml;
 553                 $elements = $this->mStripList;
 554                 if( $wgRawHtml ) {
 555                         $elements[] = 'html';
 556                 }
 557                 if( $this->mOptions->getUseTeX() ) {
 558                         $elements[] = 'math';
 559                 }
 560                 return $elements;
 561         }
 562
 563         /**
 564          * @deprecated use replaceVariables
 565          */
 566         function strip( $text, $state, $stripcomments = false , $dontstrip = array () ) {
 567                 return $text;
 568         }
 569
 570         /**
 571          * Restores pre, math, and other extensions removed by strip()
 572          *
 573          * always call unstripNoWiki() after this one
 574          * @private
 575          * @deprecated use $this->mStripState->unstrip()
 576          */
 577         function unstrip( $text, $state ) {
 578                 return $state->unstripGeneral( $text );
 579         }
 580
 581         /**
 582          * Always call this after unstrip() to preserve the order
 583          *
 584          * @private
 585          * @deprecated use $this->mStripState->unstrip()
 586          */
 587         function unstripNoWiki( $text, $state ) {
 588                 return $state->unstripNoWiki( $text );
 589         }
 590
 591         /**
 592          * @deprecated use $this->mStripState->unstripBoth()
 593          */
 594         function unstripForHTML( $text ) {
 595                 return $this->mStripState->unstripBoth( $text );
 596         }
 597
 598         /**
 599          * Add an item to the strip state
 600          * Returns the unique tag which must be inserted into the stripped text
 601          * The tag will be replaced with the original text in unstrip()
 602          *
 603          * @private
 604          */
 605         function insertStripItem( $text ) {
 606                 static $n = 0;
 607                 $rnd = "{$this->mUniqPrefix}-item-$n-{$this->mMarkerSuffix}";
 608                 ++$n;
 609                 $this->mStripState->general->setPair( $rnd, $text );
 610                 return $rnd;
 611         }
 612
 613         /**
 614          * Interface with html tidy, used if $wgUseTidy = true.
 615          * If tidy isn't able to correct the markup, the original will be
 616          * returned in all its glory with a warning comment appended.
 617          *
 618          * Either the external tidy program or the in-process tidy extension
 619          * will be used depending on availability. Override the default
 620          * $wgTidyInternal setting to disable the internal if it's not working.
 621          *
 622          * @param string $text Hideous HTML input
 623          * @return string Corrected HTML output
 624          * @public
 625          * @static
 626          */
 627         function tidy( $text ) {
 628                 global $wgTidyInternal;
 629                 $wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"'.
 630 ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>'.
 631 '<head><title>test</title></head><body>'.$text.'</body></html>';
 632                 if( $wgTidyInternal ) {
 633                         $correctedtext = Parser::internalTidy( $wrappedtext );
 634                 } else {
 635                         $correctedtext = Parser::externalTidy( $wrappedtext );
 636                 }
 637                 if( is_null( $correctedtext ) ) {
 638                         wfDebug( "Tidy error detected!\n" );
 639                         return $text . "\n<!-- Tidy found serious XHTML errors -->\n";
 640                 }
 641                 return $correctedtext;
 642         }
 643
 644         /**
 645          * Spawn an external HTML tidy process and get corrected markup back from it.
 646          *
 647          * @private
 648          * @static
 649          */
 650         function externalTidy( $text ) {
 651                 global $wgTidyConf, $wgTidyBin, $wgTidyOpts;
 652                 $fname = 'Parser::externalTidy';
 653                 wfProfileIn( $fname );
 654
 655                 $cleansource = '';
 656                 $opts = ' -utf8';
 657
 658                 $descriptorspec = array(
 659                         0 => array('pipe', 'r'),
 660                         1 => array('pipe', 'w'),
 661                         2 => array('file', wfGetNull(), 'a')
 662                 );
 663                 $pipes = array();
 664                 $process = proc_open("$wgTidyBin -config $wgTidyConf $wgTidyOpts$opts", $descriptorspec, $pipes);
 665                 if (is_resource($process)) {
 666                         // Theoretically, this style of communication could cause a deadlock
 667                         // here. If the stdout buffer fills up, then writes to stdin could
 668                         // block. This doesn't appear to happen with tidy, because tidy only
 669                         // writes to stdout after it's finished reading from stdin. Search
 670                         // for tidyParseStdin and tidySaveStdout in console/tidy.c
 671                         fwrite($pipes[0], $text);
 672                         fclose($pipes[0]);
 673                         while (!feof($pipes[1])) {
 674                                 $cleansource .= fgets($pipes[1], 1024);
 675                         }
 676                         fclose($pipes[1]);
 677                         proc_close($process);
 678                 }
 679
 680                 wfProfileOut( $fname );
 681
 682                 if( $cleansource == '' && $text != '') {
 683                         // Some kind of error happened, so we couldn't get the corrected text.
 684                         // Just give up; we'll use the source text and append a warning.
 685                         return null;
 686                 } else {
 687                         return $cleansource;
 688                 }
 689         }
 690
 691         /**
 692          * Use the HTML tidy PECL extension to use the tidy library in-process,
 693          * saving the overhead of spawning a new process.
 694          *
 695          * 'pear install tidy' should be able to compile the extension module.
 696          *
 697          * @private
 698          * @static
 699          */
 700         function internalTidy( $text ) {
 701                 global $wgTidyConf, $IP, $wgDebugTidy;
 702                 $fname = 'Parser::internalTidy';
 703                 wfProfileIn( $fname );
 704
 705                 $tidy = new tidy;
 706                 $tidy->parseString( $text, $wgTidyConf, 'utf8' );
 707                 $tidy->cleanRepair();
 708                 if( $tidy->getStatus() == 2 ) {
 709                         // 2 is magic number for fatal error
 710                         // http://www.php.net/manual/en/function.tidy-get-status.php
 711                         $cleansource = null;
 712                 } else {
 713                         $cleansource = tidy_get_output( $tidy );
 714                 }
 715                 if ( $wgDebugTidy && $tidy->getStatus() > 0 ) {
 716                         $cleansource .= "<!--\nTidy reports:\n" .
 717                                 str_replace( '-->', '--&gt;', $tidy->errorBuffer ) .
 718                                 "\n-->";
 719                 }
 720
 721                 wfProfileOut( $fname );
 722                 return $cleansource;
 723         }
 724
 725         /**
 726          * parse the wiki syntax used to render tables
 727          *
 728          * @private
 729          */
 730         function doTableStuff ( $text ) {
 731                 $fname = 'Parser::doTableStuff';
 732                 wfProfileIn( $fname );
 733
 734                 $lines = explode ( "\n" , $text );
 735                 $td_history = array (); // Is currently a td tag open?
 736                 $last_tag_history = array (); // Save history of last lag activated (td, th or caption)
 737                 $tr_history = array (); // Is currently a tr tag open?
 738                 $tr_attributes = array (); // history of tr attributes
 739                 $has_opened_tr = array(); // Did this table open a <tr> element?
 740                 $indent_level = 0; // indent level of the table
 741                 foreach ( $lines as $key => $line )
 742                 {
 743                         $line = trim ( $line );
 744
 745                         if( $line == '' ) { // empty line, go to next line
 746                                 continue;
 747                         }
 748                         $first_character = $line{0};
 749                         $matches = array();
 750
 751                         if ( preg_match( '/^(:*)\{\|(.*)$/' , $line , $matches ) ) {
 752                                 // First check if we are starting a new table
 753                                 $indent_level = strlen( $matches[1] );
 754
 755                                 $attributes = $this->mStripState->unstripBoth( $matches[2] );
 756                                 $attributes = Sanitizer::fixTagAttributes ( $attributes , 'table' );
 757
 758                                 $lines[$key] = str_repeat( '<dl><dd>' , $indent_level ) . "<table{$attributes}>";
 759                                 array_push ( $td_history , false );
 760                                 array_push ( $last_tag_history , '' );
 761                                 array_push ( $tr_history , false );
 762                                 array_push ( $tr_attributes , '' );
 763                                 array_push ( $has_opened_tr , false );
 764                         } else if ( count ( $td_history ) == 0 ) {
 765                                 // Don't do any of the following
 766                                 continue;
 767                         } else if ( substr ( $line , 0 , 2 ) == '|}' ) {
 768                                 // We are ending a table
 769                                 $line = '</table>' . substr ( $line , 2 );
 770                                 $last_tag = array_pop ( $last_tag_history );
 771
 772                                 if ( !array_pop ( $has_opened_tr ) ) {
 773                                         $line = "<tr><td></td></tr>{$line}";
 774                                 }
 775
 776                                 if ( array_pop ( $tr_history ) ) {
 777                                         $line = "</tr>{$line}";
 778                                 }
 779
 780                                 if ( array_pop ( $td_history ) ) {
 781                                         $line = "</{$last_tag}>{$line}";
 782                                 }
 783                                 array_pop ( $tr_attributes );
 784                                 $lines[$key] = $line . str_repeat( '</dd></dl>' , $indent_level );
 785                         } else if ( substr ( $line , 0 , 2 ) == '|-' ) {
 786                                 // Now we have a table row
 787                                 $line = preg_replace( '#^\|-+#', '', $line );
 788
 789                                 // Whats after the tag is now only attributes
 790                                 $attributes = $this->mStripState->unstripBoth( $line );
 791                                 $attributes = Sanitizer::fixTagAttributes ( $attributes , 'tr' );
 792                                 array_pop ( $tr_attributes );
 793                                 array_push ( $tr_attributes , $attributes );
 794
 795                                 $line = '';
 796                                 $last_tag = array_pop ( $last_tag_history );
 797                                 array_pop ( $has_opened_tr );
 798                                 array_push ( $has_opened_tr , true );
 799
 800                                 if ( array_pop ( $tr_history ) ) {
 801                                         $line = '</tr>';
 802                                 }
 803
 804                                 if ( array_pop ( $td_history ) ) {
 805                                         $line = "</{$last_tag}>{$line}";
 806                                 }
 807
 808                                 $lines[$key] = $line;
 809                                 array_push ( $tr_history , false );
 810                                 array_push ( $td_history , false );
 811                                 array_push ( $last_tag_history , '' );
 812                         }
 813                         else if ( $first_character == '|' || $first_character == '!' || substr ( $line , 0 , 2 )  == '|+' ) {
 814                                 // This might be cell elements, td, th or captions
 815                                 if ( substr ( $line , 0 , 2 ) == '|+' ) {
 816                                         $first_character = '+';
 817                                         $line = substr ( $line , 1 );
 818                                 }
 819
 820                                 $line = substr ( $line , 1 );
 821
 822                                 if ( $first_character == '!' ) {
 823                                         $line = str_replace ( '!!' , '||' , $line );
 824                                 }
 825
 826                                 // Split up multiple cells on the same line.
 827                                 // FIXME : This can result in improper nesting of tags processed
 828                                 // by earlier parser steps, but should avoid splitting up eg
 829                                 // attribute values containing literal "||".
 830                                 $cells = StringUtils::explodeMarkup( '||' , $line );
 831
 832                                 $lines[$key] = '';
 833
 834                                 // Loop through each table cell
 835                                 foreach ( $cells as $cell )
 836                                 {
 837                                         $previous = '';
 838                                         if ( $first_character != '+' )
 839                                         {
 840                                                 $tr_after = array_pop ( $tr_attributes );
 841                                                 if ( !array_pop ( $tr_history ) ) {
 842                                                         $previous = "<tr{$tr_after}>\n";
 843                                                 }
 844                                                 array_push ( $tr_history , true );
 845                                                 array_push ( $tr_attributes , '' );
 846                                                 array_pop ( $has_opened_tr );
 847                                                 array_push ( $has_opened_tr , true );
 848                                         }
 849
 850                                         $last_tag = array_pop ( $last_tag_history );
 851
 852                                         if ( array_pop ( $td_history ) ) {
 853                                                 $previous = "</{$last_tag}>{$previous}";
 854                                         }
 855
 856                                         if ( $first_character == '|' ) {
 857                                                 $last_tag = 'td';
 858                                         } else if ( $first_character == '!' ) {
 859                                                 $last_tag = 'th';
 860                                         } else if ( $first_character == '+' ) {
 861                                                 $last_tag = 'caption';
 862                                         } else {
 863                                                 $last_tag = '';
 864                                         }
 865
 866                                         array_push ( $last_tag_history , $last_tag );
 867
 868                                         // A cell could contain both parameters and data
 869                                         $cell_data = explode ( '|' , $cell , 2 );
 870
 871                                         // Bug 553: Note that a '|' inside an invalid link should not
 872                                         // be mistaken as delimiting cell parameters
 873                                         if ( strpos( $cell_data[0], '[[' ) !== false ) {
 874                                                 $cell = "{$previous}<{$last_tag}>{$cell}";
 875                                         } else if ( count ( $cell_data ) == 1 )
 876                                                 $cell = "{$previous}<{$last_tag}>{$cell_data[0]}";
 877                                         else {
 878                                                 $attributes = $this->mStripState->unstripBoth( $cell_data[0] );
 879                                                 $attributes = Sanitizer::fixTagAttributes( $attributes , $last_tag );
 880                                                 $cell = "{$previous}<{$last_tag}{$attributes}>{$cell_data[1]}";
 881                                         }
 882
 883                                         $lines[$key] .= $cell;
 884                                         array_push ( $td_history , true );
 885                                 }
 886                         }
 887                 }
 888
 889                 // Closing open td, tr && table
 890                 while ( count ( $td_history ) > 0 )
 891                 {
 892                         if ( array_pop ( $td_history ) ) {
 893                                 $lines[] = '</td>' ;
 894                         }
 895                         if ( array_pop ( $tr_history ) ) {
 896                                 $lines[] = '</tr>' ;
 897                         }
 898                         if ( !array_pop ( $has_opened_tr ) ) {
 899                                 $lines[] = "<tr><td></td></tr>" ;
 900                         }
 901
 902                         $lines[] = '</table>' ;
 903                 }
 904
 905                 $output = implode ( "\n" , $lines ) ;
 906
 907                 // special case: don't return empty table
 908                 if( $output == "<table>\n<tr><td></td></tr>\n</table>" ) {
 909                         $output = '';
 910                 }
 911
 912                 wfProfileOut( $fname );
 913
 914                 return $output;
 915         }
 916
 917         /**
 918          * Helper function for parse() that transforms wiki markup into
 919          * HTML. Only called for $mOutputType == OT_HTML.
 920          *
 921          * @private
 922          */
 923         function internalParse( $text ) {
 924                 $isMain = true;
 925                 $fname = 'Parser::internalParse';
 926                 wfProfileIn( $fname );
 927
 928                 # Hook to suspend the parser in this state
 929                 if ( !wfRunHooks( 'ParserBeforeInternalParse', array( &$this, &$text, &$this->mStripState ) ) ) {
 930                         wfProfileOut( $fname );
 931                         return $text ;
 932                 }
 933
 934                 $text = $this->replaceVariables( $text );
 935                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'attributeStripCallback' ), false, array_keys( $this->mTransparentTagHooks ) );
 936                 wfRunHooks( 'InternalParseBeforeLinks', array( &$this, &$text, &$this->mStripState ) );
 937
 938                 // Tables need to come after variable replacement for things to work
 939                 // properly; putting them before other transformations should keep
 940                 // exciting things like link expansions from showing up in surprising
 941                 // places.
 942                 $text = $this->doTableStuff( $text );
 943
 944                 $text = preg_replace( '/(^|\n)-----*/', '\\1<hr />', $text );
 945
 946                 $text = $this->stripToc( $text );
 947                 $this->stripNoGallery( $text );
 948                 $text = $this->doHeadings( $text );
 949                 if($this->mOptions->getUseDynamicDates()) {
 950                         $df =& DateFormatter::getInstance();
 951                         $text = $df->reformat( $this->mOptions->getDateFormat(), $text );
 952                 }
 953                 $text = $this->doAllQuotes( $text );
 954                 $text = $this->replaceInternalLinks( $text );
 955                 $text = $this->replaceExternalLinks( $text );
 956
 957                 # replaceInternalLinks may sometimes leave behind
 958                 # absolute URLs, which have to be masked to hide them from replaceExternalLinks
 959                 $text = str_replace($this->mUniqPrefix."NOPARSE", "", $text);
 960
 961                 $text = $this->doMagicLinks( $text );
 962                 $text = $this->formatHeadings( $text, $isMain );
 963
 964                 wfProfileOut( $fname );
 965                 return $text;
 966         }
 967
 968         /**
 969          * Replace special strings like "ISBN xxx" and "RFC xxx" with
 970          * magic external links.
 971          *
 972          * @private
 973          */
 974         function doMagicLinks( $text ) {
 975                 wfProfileIn( __METHOD__ );
 976                 $text = preg_replace_callback(
 977                         '!(?:                           # Start cases
 978                             <a.*?</a> |                 # Skip link text
 979                             <.*?> |                     # Skip stuff inside HTML elements
 980                             (?:RFC|PMID)\s+([0-9]+) |   # RFC or PMID, capture number as m[1]
 981                             ISBN\s+(\b                  # ISBN, capture number as m[2]
 982                                      (?: 97[89] [\ \-]? )?   # optional 13-digit ISBN prefix
 983                                      (?: [0-9]  [\ \-]? ){9} # 9 digits with opt. delimiters
 984                                      [0-9Xx]                 # check digit
 985                                    \b)
 986                         )!x', array( &$this, 'magicLinkCallback' ), $text );
 987                 wfProfileOut( __METHOD__ );
 988                 return $text;
 989         }
 990
 991         function magicLinkCallback( $m ) {
 992                 if ( substr( $m[0], 0, 1 ) == '<' ) {
 993                         # Skip HTML element
 994                         return $m[0];
 995                 } elseif ( substr( $m[0], 0, 4 ) == 'ISBN' ) {
 996                         $isbn = $m[2];
 997                         $num = strtr( $isbn, array(
 998                                 '-' => '',
 999                                 ' ' => '',
1000                                 'x' => 'X',
1001                         ));
1002                         $titleObj = SpecialPage::getTitleFor( 'Booksources' );
1003                         $text = '<a href="' .
1004                                 $titleObj->escapeLocalUrl( "isbn=$num" ) .
1005                                 "\" class=\"internal\">ISBN $isbn</a>";
1006                 } else {
1007                         if ( substr( $m[0], 0, 3 ) == 'RFC' ) {
1008                                 $keyword = 'RFC';
1009                                 $urlmsg = 'rfcurl';
1010                                 $id = $m[1];
1011                         } elseif ( substr( $m[0], 0, 4 ) == 'PMID' ) {
1012                                 $keyword = 'PMID';
1013                                 $urlmsg = 'pubmedurl';
1014                                 $id = $m[1];
1015                         } else {
1016                                 throw new MWException( __METHOD__.': unrecognised match type "' .
1017                                         substr($m[0], 0, 20 ) . '"' );
1018                         }
1019
1020                         $url = wfMsg( $urlmsg, $id);
1021                         $sk = $this->mOptions->getSkin();
1022                         $la = $sk->getExternalLinkAttributes( $url, $keyword.$id );
1023                         $text = "<a href=\"{$url}\"{$la}>{$keyword} {$id}</a>";
1024                 }
1025                 return $text;
1026         }
1027
1028         /**
1029          * Parse headers and return html
1030          *
1031          * @private
1032          */
1033         function doHeadings( $text ) {
1034                 $fname = 'Parser::doHeadings';
1035                 wfProfileIn( $fname );
1036                 for ( $i = 6; $i >= 1; --$i ) {
1037                         $h = str_repeat( '=', $i );
1038                         $text = preg_replace( "/^$h(.+)$h\\s*$/m",
1039                           "<h$i>\\1</h$i>", $text );
1040                 }
1041                 wfProfileOut( $fname );
1042                 return $text;
1043         }
1044
1045         /**
1046          * Replace single quotes with HTML markup
1047          * @private
1048          * @return string the altered text
1049          */
1050         function doAllQuotes( $text ) {
1051                 $fname = 'Parser::doAllQuotes';
1052                 wfProfileIn( $fname );
1053                 $outtext = '';
1054                 $lines = explode( "\n", $text );
1055                 foreach ( $lines as $line ) {
1056                         $outtext .= $this->doQuotes ( $line ) . "\n";
1057                 }
1058                 $outtext = substr($outtext, 0,-1);
1059                 wfProfileOut( $fname );
1060                 return $outtext;
1061         }
1062
1063         /**
1064          * Helper function for doAllQuotes()
1065          */
1066         public function doQuotes( $text ) {
1067                 $arr = preg_split( "/(''+)/", $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1068                 if ( count( $arr ) == 1 )
1069                         return $text;
1070                 else
1071                 {
1072                         # First, do some preliminary work. This may shift some apostrophes from
1073                         # being mark-up to being text. It also counts the number of occurrences
1074                         # of bold and italics mark-ups.
1075                         $i = 0;
1076                         $numbold = 0;
1077                         $numitalics = 0;
1078                         foreach ( $arr as $r )
1079                         {
1080                                 if ( ( $i % 2 ) == 1 )
1081                                 {
1082                                         # If there are ever four apostrophes, assume the first is supposed to
1083                                         # be text, and the remaining three constitute mark-up for bold text.
1084                                         if ( strlen( $arr[$i] ) == 4 )
1085                                         {
1086                                                 $arr[$i-1] .= "'";
1087                                                 $arr[$i] = "'''";
1088                                         }
1089                                         # If there are more than 5 apostrophes in a row, assume they're all
1090                                         # text except for the last 5.
1091                                         else if ( strlen( $arr[$i] ) > 5 )
1092                                         {
1093                                                 $arr[$i-1] .= str_repeat( "'", strlen( $arr[$i] ) - 5 );
1094                                                 $arr[$i] = "'''''";
1095                                         }
1096                                         # Count the number of occurrences of bold and italics mark-ups.
1097                                         # We are not counting sequences of five apostrophes.
1098                                         if ( strlen( $arr[$i] ) == 2 )      { $numitalics++;             }
1099                                         else if ( strlen( $arr[$i] ) == 3 ) { $numbold++;                }
1100                                         else if ( strlen( $arr[$i] ) == 5 ) { $numitalics++; $numbold++; }
1101                                 }
1102                                 $i++;
1103                         }
1104
1105                         # If there is an odd number of both bold and italics, it is likely
1106                         # that one of the bold ones was meant to be an apostrophe followed
1107                         # by italics. Which one we cannot know for certain, but it is more
1108                         # likely to be one that has a single-letter word before it.
1109                         if ( ( $numbold % 2 == 1 ) && ( $numitalics % 2 == 1 ) )
1110                         {
1111                                 $i = 0;
1112                                 $firstsingleletterword = -1;
1113                                 $firstmultiletterword = -1;
1114                                 $firstspace = -1;
1115                                 foreach ( $arr as $r )
1116                                 {
1117                                         if ( ( $i % 2 == 1 ) and ( strlen( $r ) == 3 ) )
1118                                         {
1119                                                 $x1 = substr ($arr[$i-1], -1);
1120                                                 $x2 = substr ($arr[$i-1], -2, 1);
1121                                                 if ($x1 == ' ') {
1122                                                         if ($firstspace == -1) $firstspace = $i;
1123                                                 } else if ($x2 == ' ') {
1124                                                         if ($firstsingleletterword == -1) $firstsingleletterword = $i;
1125                                                 } else {
1126                                                         if ($firstmultiletterword == -1) $firstmultiletterword = $i;
1127                                                 }
1128                                         }
1129                                         $i++;
1130                                 }
1131
1132                                 # If there is a single-letter word, use it!
1133                                 if ($firstsingleletterword > -1)
1134                                 {
1135                                         $arr [ $firstsingleletterword ] = "''";
1136                                         $arr [ $firstsingleletterword-1 ] .= "'";
1137                                 }
1138                                 # If not, but there's a multi-letter word, use that one.
1139                                 else if ($firstmultiletterword > -1)
1140                                 {
1141                                         $arr [ $firstmultiletterword ] = "''";
1142                                         $arr [ $firstmultiletterword-1 ] .= "'";
1143                                 }
1144                                 # ... otherwise use the first one that has neither.
1145                                 # (notice that it is possible for all three to be -1 if, for example,
1146                                 # there is only one pentuple-apostrophe in the line)
1147                                 else if ($firstspace > -1)
1148                                 {
1149                                         $arr [ $firstspace ] = "''";
1150                                         $arr [ $firstspace-1 ] .= "'";
1151                                 }
1152                         }
1153
1154                         # Now let's actually convert our apostrophic mush to HTML!
1155                         $output = '';
1156                         $buffer = '';
1157                         $state = '';
1158                         $i = 0;
1159                         foreach ($arr as $r)
1160                         {
1161                                 if (($i % 2) == 0)
1162                                 {
1163                                         if ($state == 'both')
1164                                                 $buffer .= $r;
1165                                         else
1166                                                 $output .= $r;
1167                                 }
1168                                 else
1169                                 {
1170                                         if (strlen ($r) == 2)
1171                                         {
1172                                                 if ($state == 'i')
1173                                                 { $output .= '</i>'; $state = ''; }
1174                                                 else if ($state == 'bi')
1175                                                 { $output .= '</i>'; $state = 'b'; }
1176                                                 else if ($state == 'ib')
1177                                                 { $output .= '</b></i><b>'; $state = 'b'; }
1178                                                 else if ($state == 'both')
1179                                                 { $output .= '<b><i>'.$buffer.'</i>'; $state = 'b'; }
1180                                                 else # $state can be 'b' or ''
1181                                                 { $output .= '<i>'; $state .= 'i'; }
1182                                         }
1183                                         else if (strlen ($r) == 3)
1184                                         {
1185                                                 if ($state == 'b')
1186                                                 { $output .= '</b>'; $state = ''; }
1187                                                 else if ($state == 'bi')
1188                                                 { $output .= '</i></b><i>'; $state = 'i'; }
1189                                                 else if ($state == 'ib')
1190                                                 { $output .= '</b>'; $state = 'i'; }
1191                                                 else if ($state == 'both')
1192                                                 { $output .= '<i><b>'.$buffer.'</b>'; $state = 'i'; }
1193                                                 else # $state can be 'i' or ''
1194                                                 { $output .= '<b>'; $state .= 'b'; }
1195                                         }
1196                                         else if (strlen ($r) == 5)
1197                                         {
1198                                                 if ($state == 'b')
1199                                                 { $output .= '</b><i>'; $state = 'i'; }
1200                                                 else if ($state == 'i')
1201                                                 { $output .= '</i><b>'; $state = 'b'; }
1202                                                 else if ($state == 'bi')
1203                                                 { $output .= '</i></b>'; $state = ''; }
1204                                                 else if ($state == 'ib')
1205                                                 { $output .= '</b></i>'; $state = ''; }
1206                                                 else if ($state == 'both')
1207                                                 { $output .= '<i><b>'.$buffer.'</b></i>'; $state = ''; }
1208                                                 else # ($state == '')
1209                                                 { $buffer = ''; $state = 'both'; }
1210                                         }
1211                                 }
1212                                 $i++;
1213                         }
1214                         # Now close all remaining tags.  Notice that the order is important.
1215                         if ($state == 'b' || $state == 'ib')
1216                                 $output .= '</b>';
1217                         if ($state == 'i' || $state == 'bi' || $state == 'ib')
1218                                 $output .= '</i>';
1219                         if ($state == 'bi')
1220                                 $output .= '</b>';
1221                         # There might be lonely ''''', so make sure we have a buffer
1222                         if ($state == 'both' && $buffer)
1223                                 $output .= '<b><i>'.$buffer.'</i></b>';
1224                         return $output;
1225                 }
1226         }
1227
1228         /**
1229          * Replace external links
1230          *
1231          * Note: this is all very hackish and the order of execution matters a lot.
1232          * Make sure to run maintenance/parserTests.php if you change this code.
1233          *
1234          * @private
1235          */
1236         function replaceExternalLinks( $text ) {
1237                 global $wgContLang;
1238                 $fname = 'Parser::replaceExternalLinks';
1239                 wfProfileIn( $fname );
1240
1241                 $sk = $this->mOptions->getSkin();
1242
1243                 $bits = preg_split( $this->mExtLinkBracketedRegex, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1244
1245                 $s = $this->replaceFreeExternalLinks( array_shift( $bits ) );
1246
1247                 $i = 0;
1248                 while ( $i<count( $bits ) ) {
1249                         $url = $bits[$i++];
1250                         $protocol = $bits[$i++];
1251                         $text = $bits[$i++];
1252                         $trail = $bits[$i++];
1253
1254                         # The characters '<' and '>' (which were escaped by
1255                         # removeHTMLtags()) should not be included in
1256                         # URLs, per RFC 2396.
1257                         $m2 = array();
1258                         if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1259                                 $text = substr($url, $m2[0][1]) . ' ' . $text;
1260                                 $url = substr($url, 0, $m2[0][1]);
1261                         }
1262
1263                         # If the link text is an image URL, replace it with an <img> tag
1264                         # This happened by accident in the original parser, but some people used it extensively
1265                         $img = $this->maybeMakeExternalImage( $text );
1266                         if ( $img !== false ) {
1267                                 $text = $img;
1268                         }
1269
1270                         $dtrail = '';
1271
1272                         # Set linktype for CSS - if URL==text, link is essentially free
1273                         $linktype = ($text == $url) ? 'free' : 'text';
1274
1275                         # No link text, e.g. [http://domain.tld/some.link]
1276                         if ( $text == '' ) {
1277                                 # Autonumber if allowed. See bug #5918
1278                                 if ( strpos( wfUrlProtocols(), substr($protocol, 0, strpos($protocol, ':')) ) !== false ) {
1279                                         $text = '[' . ++$this->mAutonumber . ']';
1280                                         $linktype = 'autonumber';
1281                                 } else {
1282                                         # Otherwise just use the URL
1283                                         $text = htmlspecialchars( $url );
1284                                         $linktype = 'free';
1285                                 }
1286                         } else {
1287                                 # Have link text, e.g. [http://domain.tld/some.link text]s
1288                                 # Check for trail
1289                                 list( $dtrail, $trail ) = Linker::splitTrail( $trail );
1290                         }
1291
1292                         $text = $wgContLang->markNoConversion($text);
1293
1294                         $url = Sanitizer::cleanUrl( $url );
1295
1296                         # Process the trail (i.e. everything after this link up until start of the next link),
1297                         # replacing any non-bracketed links
1298                         $trail = $this->replaceFreeExternalLinks( $trail );
1299
1300                         # Use the encoded URL
1301                         # This means that users can paste URLs directly into the text
1302                         # Funny characters like &ouml; aren't valid in URLs anyway
1303                         # This was changed in August 2004
1304                         $s .= $sk->makeExternalLink( $url, $text, false, $linktype, $this->mTitle->getNamespace() ) . $dtrail . $trail;
1305
1306                         # Register link in the output object.
1307                         # Replace unnecessary URL escape codes with the referenced character
1308                         # This prevents spammers from hiding links from the filters
1309                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1310                         $this->mOutput->addExternalLink( $pasteurized );
1311                 }
1312
1313                 wfProfileOut( $fname );
1314                 return $s;
1315         }
1316
1317         /**
1318          * Replace anything that looks like a URL with a link
1319          * @private
1320          */
1321         function replaceFreeExternalLinks( $text ) {
1322                 global $wgContLang;
1323                 $fname = 'Parser::replaceFreeExternalLinks';
1324                 wfProfileIn( $fname );
1325
1326                 $bits = preg_split( '/(\b(?:' . wfUrlProtocols() . '))/S', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1327                 $s = array_shift( $bits );
1328                 $i = 0;
1329
1330                 $sk = $this->mOptions->getSkin();
1331
1332                 while ( $i < count( $bits ) ){
1333                         $protocol = $bits[$i++];
1334                         $remainder = $bits[$i++];
1335
1336                         $m = array();
1337                         if ( preg_match( '/^('.self::EXT_LINK_URL_CLASS.'+)(.*)$/s', $remainder, $m ) ) {
1338                                 # Found some characters after the protocol that look promising
1339                                 $url = $protocol . $m[1];
1340                                 $trail = $m[2];
1341
1342                                 # special case: handle urls as url args:
1343                                 # http://www.example.com/foo?=http://www.example.com/bar
1344                                 if(strlen($trail) == 0 &&
1345                                         isset($bits[$i]) &&
1346                                         preg_match('/^'. wfUrlProtocols() . '$/S', $bits[$i]) &&
1347                                         preg_match( '/^('.self::EXT_LINK_URL_CLASS.'+)(.*)$/s', $bits[$i + 1], $m ))
1348                                 {
1349                                         # add protocol, arg
1350                                         $url .= $bits[$i] . $m[1]; # protocol, url as arg to previous link
1351                                         $i += 2;
1352                                         $trail = $m[2];
1353                                 }
1354
1355                                 # The characters '<' and '>' (which were escaped by
1356                                 # removeHTMLtags()) should not be included in
1357                                 # URLs, per RFC 2396.
1358                                 $m2 = array();
1359                                 if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1360                                         $trail = substr($url, $m2[0][1]) . $trail;
1361                                         $url = substr($url, 0, $m2[0][1]);
1362                                 }
1363
1364                                 # Move trailing punctuation to $trail
1365                                 $sep = ',;\.:!?';
1366                                 # If there is no left bracket, then consider right brackets fair game too
1367                                 if ( strpos( $url, '(' ) === false ) {
1368                                         $sep .= ')';
1369                                 }
1370
1371                                 $numSepChars = strspn( strrev( $url ), $sep );
1372                                 if ( $numSepChars ) {
1373                                         $trail = substr( $url, -$numSepChars ) . $trail;
1374                                         $url = substr( $url, 0, -$numSepChars );
1375                                 }
1376
1377                                 $url = Sanitizer::cleanUrl( $url );
1378
1379                                 # Is this an external image?
1380                                 $text = $this->maybeMakeExternalImage( $url );
1381                                 if ( $text === false ) {
1382                                         # Not an image, make a link
1383                                         $text = $sk->makeExternalLink( $url, $wgContLang->markNoConversion($url), true, 'free', $this->mTitle->getNamespace() );
1384                                         # Register it in the output object...
1385                                         # Replace unnecessary URL escape codes with their equivalent characters
1386                                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1387                                         $this->mOutput->addExternalLink( $pasteurized );
1388                                 }
1389                                 $s .= $text . $trail;
1390                         } else {
1391                                 $s .= $protocol . $remainder;
1392                         }
1393                 }
1394                 wfProfileOut( $fname );
1395                 return $s;
1396         }
1397
1398         /**
1399          * Replace unusual URL escape codes with their equivalent characters
1400          * @param string
1401          * @return string
1402          * @static
1403          * @todo  This can merge genuinely required bits in the path or query string,
1404          *        breaking legit URLs. A proper fix would treat the various parts of
1405          *        the URL differently; as a workaround, just use the output for
1406          *        statistical records, not for actual linking/output.
1407          */
1408         static function replaceUnusualEscapes( $url ) {
1409                 return preg_replace_callback( '/%[0-9A-Fa-f]{2}/',
1410                         array( 'Parser', 'replaceUnusualEscapesCallback' ), $url );
1411         }
1412
1413         /**
1414          * Callback function used in replaceUnusualEscapes().
1415          * Replaces unusual URL escape codes with their equivalent character
1416          * @static
1417          * @private
1418          */
1419         private static function replaceUnusualEscapesCallback( $matches ) {
1420                 $char = urldecode( $matches[0] );
1421                 $ord = ord( $char );
1422                 // Is it an unsafe or HTTP reserved character according to RFC 1738?
1423                 if ( $ord > 32 && $ord < 127 && strpos( '<>"#{}|\^~[]`;/?', $char ) === false ) {
1424                         // No, shouldn't be escaped
1425                         return $char;
1426                 } else {
1427                         // Yes, leave it escaped
1428                         return $matches[0];
1429                 }
1430         }
1431
1432         /**
1433          * make an image if it's allowed, either through the global
1434          * option or through the exception
1435          * @private
1436          */
1437         function maybeMakeExternalImage( $url ) {
1438                 $sk = $this->mOptions->getSkin();
1439                 $imagesfrom = $this->mOptions->getAllowExternalImagesFrom();
1440                 $imagesexception = !empty($imagesfrom);
1441                 $text = false;
1442                 if ( $this->mOptions->getAllowExternalImages()
1443                      || ( $imagesexception && strpos( $url, $imagesfrom ) === 0 ) ) {
1444                         if ( preg_match( self::EXT_IMAGE_REGEX, $url ) ) {
1445                                 # Image found
1446                                 $text = $sk->makeExternalImage( htmlspecialchars( $url ) );
1447                         }
1448                 }
1449                 return $text;
1450         }
1451
1452         /**
1453          * Process [[ ]] wikilinks
1454          *
1455          * @private
1456          */
1457         function replaceInternalLinks( $s ) {
1458                 global $wgContLang;
1459                 static $fname = 'Parser::replaceInternalLinks' ;
1460
1461                 wfProfileIn( $fname );
1462
1463                 wfProfileIn( $fname.'-setup' );
1464                 static $tc = FALSE;
1465                 # the % is needed to support urlencoded titles as well
1466                 if ( !$tc ) { $tc = Title::legalChars() . '#%'; }
1467
1468                 $sk = $this->mOptions->getSkin();
1469
1470                 #split the entire text string on occurences of [[
1471                 $a = explode( '[[', ' ' . $s );
1472                 #get the first element (all text up to first [[), and remove the space we added
1473                 $s = array_shift( $a );
1474                 $s = substr( $s, 1 );
1475
1476                 # Match a link having the form [[namespace:link|alternate]]trail
1477                 static $e1 = FALSE;
1478                 if ( !$e1 ) { $e1 = "/^([{$tc}]+)(?:\\|(.+?))?]](.*)\$/sD"; }
1479                 # Match cases where there is no "]]", which might still be images
1480                 static $e1_img = FALSE;
1481                 if ( !$e1_img ) { $e1_img = "/^([{$tc}]+)\\|(.*)\$/sD"; }
1482
1483                 $useLinkPrefixExtension = $wgContLang->linkPrefixExtension();
1484                 $e2 = null;
1485                 if ( $useLinkPrefixExtension ) {
1486                         # Match the end of a line for a word that's not followed by whitespace,
1487                         # e.g. in the case of 'The Arab al[[Razi]]', 'al' will be matched
1488                         $e2 = wfMsgForContent( 'linkprefix' );
1489                 }
1490
1491                 if( is_null( $this->mTitle ) ) {
1492                         throw new MWException( __METHOD__.": \$this->mTitle is null\n" );
1493                 }
1494                 $nottalk = !$this->mTitle->isTalkPage();
1495
1496                 if ( $useLinkPrefixExtension ) {
1497                         $m = array();
1498                         if ( preg_match( $e2, $s, $m ) ) {
1499                                 $first_prefix = $m[2];
1500                         } else {
1501                                 $first_prefix = false;
1502                         }
1503                 } else {
1504                         $prefix = '';
1505                 }
1506
1507                 if($wgContLang->hasVariants()) {
1508                         $selflink = $wgContLang->convertLinkToAllVariants($this->mTitle->getPrefixedText());
1509                 } else {
1510                         $selflink = array($this->mTitle->getPrefixedText());
1511                 }
1512                 $useSubpages = $this->areSubpagesAllowed();
1513                 wfProfileOut( $fname.'-setup' );
1514
1515                 # Loop for each link
1516                 for ($k = 0; isset( $a[$k] ); $k++) {
1517                         $line = $a[$k];
1518                         if ( $useLinkPrefixExtension ) {
1519                                 wfProfileIn( $fname.'-prefixhandling' );
1520                                 if ( preg_match( $e2, $s, $m ) ) {
1521                                         $prefix = $m[2];
1522                                         $s = $m[1];
1523                                 } else {
1524                                         $prefix='';
1525                                 }
1526                                 # first link
1527                                 if($first_prefix) {
1528                                         $prefix = $first_prefix;
1529                                         $first_prefix = false;
1530                                 }
1531                                 wfProfileOut( $fname.'-prefixhandling' );
1532                         }
1533
1534                         $might_be_img = false;
1535
1536                         wfProfileIn( "$fname-e1" );
1537                         if ( preg_match( $e1, $line, $m ) ) { # page with normal text or alt
1538                                 $text = $m[2];
1539                                 # If we get a ] at the beginning of $m[3] that means we have a link that's something like:
1540                                 # [[Image:Foo.jpg|[http://example.com desc]]] <- having three ] in a row fucks up,
1541                                 # the real problem is with the $e1 regex
1542                                 # See bug 1300.
1543                                 #
1544                                 # Still some problems for cases where the ] is meant to be outside punctuation,
1545                                 # and no image is in sight. See bug 2095.
1546                                 #
1547                                 if( $text !== '' &&
1548                                         substr( $m[3], 0, 1 ) === ']' &&
1549                                         strpos($text, '[') !== false
1550                                 )
1551                                 {
1552                                         $text .= ']'; # so that replaceExternalLinks($text) works later
1553                                         $m[3] = substr( $m[3], 1 );
1554                                 }
1555                                 # fix up urlencoded title texts
1556                                 if( strpos( $m[1], '%' ) !== false ) {
1557                                         # Should anchors '#' also be rejected?
1558                                         $m[1] = str_replace( array('<', '>'), array('&lt;', '&gt;'), urldecode($m[1]) );
1559                                 }
1560                                 $trail = $m[3];
1561                         } elseif( preg_match($e1_img, $line, $m) ) { # Invalid, but might be an image with a link in its caption
1562                                 $might_be_img = true;
1563                                 $text = $m[2];
1564                                 if ( strpos( $m[1], '%' ) !== false ) {
1565                                         $m[1] = urldecode($m[1]);
1566                                 }
1567                                 $trail = "";
1568                         } else { # Invalid form; output directly
1569                                 $s .= $prefix . '[[' . $line ;
1570                                 wfProfileOut( "$fname-e1" );
1571                                 continue;
1572                         }
1573                         wfProfileOut( "$fname-e1" );
1574                         wfProfileIn( "$fname-misc" );
1575
1576                         # Don't allow internal links to pages containing
1577                         # PROTO: where PROTO is a valid URL protocol; these
1578                         # should be external links.
1579                         if (preg_match('/^\b(?:' . wfUrlProtocols() . ')/', $m[1])) {
1580                                 $s .= $prefix . '[[' . $line ;
1581                                 continue;
1582                         }
1583
1584                         # Make subpage if necessary
1585                         if( $useSubpages ) {
1586                                 $link = $this->maybeDoSubpageLink( $m[1], $text );
1587                         } else {
1588                                 $link = $m[1];
1589                         }
1590
1591                         $noforce = (substr($m[1], 0, 1) != ':');
1592                         if (!$noforce) {
1593                                 # Strip off leading ':'
1594                                 $link = substr($link, 1);
1595                         }
1596
1597                         wfProfileOut( "$fname-misc" );
1598                         wfProfileIn( "$fname-title" );
1599                         $nt = Title::newFromText( $this->mStripState->unstripNoWiki($link) );
1600                         if( !$nt ) {
1601                                 $s .= $prefix . '[[' . $line;
1602                                 wfProfileOut( "$fname-title" );
1603                                 continue;
1604                         }
1605
1606                         $ns = $nt->getNamespace();
1607                         $iw = $nt->getInterWiki();
1608                         wfProfileOut( "$fname-title" );
1609
1610                         if ($might_be_img) { # if this is actually an invalid link
1611                                 wfProfileIn( "$fname-might_be_img" );
1612                                 if ($ns == NS_IMAGE && $noforce) { #but might be an image
1613                                         $found = false;
1614                                         while (isset ($a[$k+1]) ) {
1615                                                 #look at the next 'line' to see if we can close it there
1616                                                 $spliced = array_splice( $a, $k + 1, 1 );
1617                                                 $next_line = array_shift( $spliced );
1618                                                 $m = explode( ']]', $next_line, 3 );
1619                                                 if ( count( $m ) == 3 ) {
1620                                                         # the first ]] closes the inner link, the second the image
1621                                                         $found = true;
1622                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1623                                                         $trail = $m[2];
1624                                                         break;
1625                                                 } elseif ( count( $m ) == 2 ) {
1626                                                         #if there's exactly one ]] that's fine, we'll keep looking
1627                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1628                                                 } else {
1629                                                         #if $next_line is invalid too, we need look no further
1630                                                         $text .= '[[' . $next_line;
1631                                                         break;
1632                                                 }
1633                                         }
1634                                         if ( !$found ) {
1635                                                 # we couldn't find the end of this imageLink, so output it raw
1636                                                 #but don't ignore what might be perfectly normal links in the text we've examined
1637                                                 $text = $this->replaceInternalLinks($text);
1638                                                 $s .= "{$prefix}[[$link|$text";
1639                                                 # note: no $trail, because without an end, there *is* no trail
1640                                                 wfProfileOut( "$fname-might_be_img" );
1641                                                 continue;
1642                                         }
1643                                 } else { #it's not an image, so output it raw
1644                                         $s .= "{$prefix}[[$link|$text";
1645                                         # note: no $trail, because without an end, there *is* no trail
1646                                         wfProfileOut( "$fname-might_be_img" );
1647                                         continue;
1648                                 }
1649                                 wfProfileOut( "$fname-might_be_img" );
1650                         }
1651
1652                         $wasblank = ( '' == $text );
1653                         if( $wasblank ) $text = $link;
1654
1655                         # Link not escaped by : , create the various objects
1656                         if( $noforce ) {
1657
1658                                 # Interwikis
1659                                 wfProfileIn( "$fname-interwiki" );
1660                                 if( $iw && $this->mOptions->getInterwikiMagic() && $nottalk && $wgContLang->getLanguageName( $iw ) ) {
1661                                         $this->mOutput->addLanguageLink( $nt->getFullText() );
1662                                         $s = rtrim($s . $prefix);
1663                                         $s .= trim($trail, "\n") == '' ? '': $prefix . $trail;
1664                                         wfProfileOut( "$fname-interwiki" );
1665                                         continue;
1666                                 }
1667                                 wfProfileOut( "$fname-interwiki" );
1668
1669                                 if ( $ns == NS_IMAGE ) {
1670                                         wfProfileIn( "$fname-image" );
1671                                         if ( !wfIsBadImage( $nt->getDBkey(), $this->mTitle ) ) {
1672                                                 # recursively parse links inside the image caption
1673                                                 # actually, this will parse them in any other parameters, too,
1674                                                 # but it might be hard to fix that, and it doesn't matter ATM
1675                                                 $text = $this->replaceExternalLinks($text);
1676                                                 $text = $this->replaceInternalLinks($text);
1677
1678                                                 # cloak any absolute URLs inside the image markup, so replaceExternalLinks() won't touch them
1679                                                 $s .= $prefix . $this->armorLinks( $this->makeImage( $nt, $text ) ) . $trail;
1680                                                 $this->mOutput->addImage( $nt->getDBkey() );
1681
1682                                                 wfProfileOut( "$fname-image" );
1683                                                 continue;
1684                                         } else {
1685                                                 # We still need to record the image's presence on the page
1686                                                 $this->mOutput->addImage( $nt->getDBkey() );
1687                                         }
1688                                         wfProfileOut( "$fname-image" );
1689
1690                                 }
1691
1692                                 if ( $ns == NS_CATEGORY ) {
1693                                         wfProfileIn( "$fname-category" );
1694                                         $s = rtrim($s . "\n"); # bug 87
1695
1696                                         if ( $wasblank ) {
1697                                                 $sortkey = $this->getDefaultSort();
1698                                         } else {
1699                                                 $sortkey = $text;
1700                                         }
1701                                         $sortkey = Sanitizer::decodeCharReferences( $sortkey );
1702                                         $sortkey = str_replace( "\n", '', $sortkey );
1703                                         $sortkey = $wgContLang->convertCategoryKey( $sortkey );
1704                                         $this->mOutput->addCategory( $nt->getDBkey(), $sortkey );
1705
1706                                         /**
1707                                          * Strip the whitespace Category links produce, see bug 87
1708                                          * @todo We might want to use trim($tmp, "\n") here.
1709                                          */
1710                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1711
1712                                         wfProfileOut( "$fname-category" );
1713                                         continue;
1714                                 }
1715                         }
1716
1717                         # Self-link checking
1718                         if( $nt->getFragment() === '' ) {
1719                                 if( in_array( $nt->getPrefixedText(), $selflink, true ) ) {
1720                                         $s .= $prefix . $sk->makeSelfLinkObj( $nt, $text, '', $trail );
1721                                         continue;
1722                                 }
1723                         }
1724
1725                         # Special and Media are pseudo-namespaces; no pages actually exist in them
1726                         if( $ns == NS_MEDIA ) {
1727                                 $link = $sk->makeMediaLinkObj( $nt, $text );
1728                                 # Cloak with NOPARSE to avoid replacement in replaceExternalLinks
1729                                 $s .= $prefix . $this->armorLinks( $link ) . $trail;
1730                                 $this->mOutput->addImage( $nt->getDBkey() );
1731                                 continue;
1732                         } elseif( $ns == NS_SPECIAL ) {
1733                                 if( SpecialPage::exists( $nt->getDBkey() ) ) {
1734                                         $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1735                                 } else {
1736                                         $s .= $this->makeLinkHolder( $nt, $text, '', $trail, $prefix );
1737                                 }
1738                                 continue;
1739                         } elseif( $ns == NS_IMAGE ) {
1740                                 $img = wfFindFile( $nt );
1741                                 if( $img ) {
1742                                         // Force a blue link if the file exists; may be a remote
1743                                         // upload on the shared repository, and we want to see its
1744                                         // auto-generated page.
1745                                         $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1746                                         $this->mOutput->addLink( $nt );
1747                                         continue;
1748                                 }
1749                         }
1750                         $s .= $this->makeLinkHolder( $nt, $text, '', $trail, $prefix );
1751                 }
1752                 wfProfileOut( $fname );
1753                 return $s;
1754         }
1755
1756         /**
1757          * Make a link placeholder. The text returned can be later resolved to a real link with
1758          * replaceLinkHolders(). This is done for two reasons: firstly to avoid further
1759          * parsing of interwiki links, and secondly to allow all existence checks and
1760          * article length checks (for stub links) to be bundled into a single query.
1761          *
1762          */
1763         function makeLinkHolder( &$nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1764                 wfProfileIn( __METHOD__ );
1765                 if ( ! is_object($nt) ) {
1766                         # Fail gracefully
1767                         $retVal = "<!-- ERROR -->{$prefix}{$text}{$trail}";
1768                 } else {
1769                         # Separate the link trail from the rest of the link
1770                         list( $inside, $trail ) = Linker::splitTrail( $trail );
1771
1772                         if ( $nt->isExternal() ) {
1773                                 $nr = array_push( $this->mInterwikiLinkHolders['texts'], $prefix.$text.$inside );
1774                                 $this->mInterwikiLinkHolders['titles'][] = $nt;
1775                                 $retVal = '<!--IWLINK '. ($nr-1) ."-->{$trail}";
1776                         } else {
1777                                 $nr = array_push( $this->mLinkHolders['namespaces'], $nt->getNamespace() );
1778                                 $this->mLinkHolders['dbkeys'][] = $nt->getDBkey();
1779                                 $this->mLinkHolders['queries'][] = $query;
1780                                 $this->mLinkHolders['texts'][] = $prefix.$text.$inside;
1781                                 $this->mLinkHolders['titles'][] = $nt;
1782
1783                                 $retVal = '<!--LINK '. ($nr-1) ."-->{$trail}";
1784                         }
1785                 }
1786                 wfProfileOut( __METHOD__ );
1787                 return $retVal;
1788         }
1789
1790         /**
1791          * Render a forced-blue link inline; protect against double expansion of
1792          * URLs if we're in a mode that prepends full URL prefixes to internal links.
1793          * Since this little disaster has to split off the trail text to avoid
1794          * breaking URLs in the following text without breaking trails on the
1795          * wiki links, it's been made into a horrible function.
1796          *
1797          * @param Title $nt
1798          * @param string $text
1799          * @param string $query
1800          * @param string $trail
1801          * @param string $prefix
1802          * @return string HTML-wikitext mix oh yuck
1803          */
1804         function makeKnownLinkHolder( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1805                 list( $inside, $trail ) = Linker::splitTrail( $trail );
1806                 $sk = $this->mOptions->getSkin();
1807                 $link = $sk->makeKnownLinkObj( $nt, $text, $query, $inside, $prefix );
1808                 return $this->armorLinks( $link ) . $trail;
1809         }
1810
1811         /**
1812          * Insert a NOPARSE hacky thing into any inline links in a chunk that's
1813          * going to go through further parsing steps before inline URL expansion.
1814          *
1815          * In particular this is important when using action=render, which causes
1816          * full URLs to be included.
1817          *
1818          * Oh man I hate our multi-layer parser!
1819          *
1820          * @param string more-or-less HTML
1821          * @return string less-or-more HTML with NOPARSE bits
1822          */
1823         function armorLinks( $text ) {
1824                 return preg_replace( '/\b(' . wfUrlProtocols() . ')/',
1825                         "{$this->mUniqPrefix}NOPARSE$1", $text );
1826         }
1827
1828         /**
1829          * Return true if subpage links should be expanded on this page.
1830          * @return bool
1831          */
1832         function areSubpagesAllowed() {
1833                 # Some namespaces don't allow subpages
1834                 global $wgNamespacesWithSubpages;
1835                 return !empty($wgNamespacesWithSubpages[$this->mTitle->getNamespace()]);
1836         }
1837
1838         /**
1839          * Handle link to subpage if necessary
1840          * @param string $target the source of the link
1841          * @param string &$text the link text, modified as necessary
1842          * @return string the full name of the link
1843          * @private
1844          */
1845         function maybeDoSubpageLink($target, &$text) {
1846                 # Valid link forms:
1847                 # Foobar -- normal
1848                 # :Foobar -- override special treatment of prefix (images, language links)
1849                 # /Foobar -- convert to CurrentPage/Foobar
1850                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1851                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1852                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1853
1854                 $fname = 'Parser::maybeDoSubpageLink';
1855                 wfProfileIn( $fname );
1856                 $ret = $target; # default return value is no change
1857
1858                 # Some namespaces don't allow subpages,
1859                 # so only perform processing if subpages are allowed
1860                 if( $this->areSubpagesAllowed() ) {
1861                         $hash = strpos( $target, '#' );
1862                         if( $hash !== false ) {
1863                                 $suffix = substr( $target, $hash );
1864                                 $target = substr( $target, 0, $hash );
1865                         } else {
1866                                 $suffix = '';
1867                         }
1868                         # bug 7425
1869                         $target = trim( $target );
1870                         # Look at the first character
1871                         if( $target != '' && $target{0} == '/' ) {
1872                                 # / at end means we don't want the slash to be shown
1873                                 $m = array();
1874                                 $trailingSlashes = preg_match_all( '%(/+)$%', $target, $m );
1875                                 if( $trailingSlashes ) {
1876                                         $noslash = $target = substr( $target, 1, -strlen($m[0][0]) );
1877                                 } else {
1878                                         $noslash = substr( $target, 1 );
1879                                 }
1880
1881                                 $ret = $this->mTitle->getPrefixedText(). '/' . trim($noslash) . $suffix;
1882                                 if( '' === $text ) {
1883                                         $text = $target . $suffix;
1884                                 } # this might be changed for ugliness reasons
1885                         } else {
1886                                 # check for .. subpage backlinks
1887                                 $dotdotcount = 0;
1888                                 $nodotdot = $target;
1889                                 while( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1890                                         ++$dotdotcount;
1891                                         $nodotdot = substr( $nodotdot, 3 );
1892                                 }
1893                                 if($dotdotcount > 0) {
1894                                         $exploded = explode( '/', $this->mTitle->GetPrefixedText() );
1895                                         if( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1896                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1897                                                 # / at the end means don't show full path
1898                                                 if( substr( $nodotdot, -1, 1 ) == '/' ) {
1899                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1900                                                         if( '' === $text ) {
1901                                                                 $text = $nodotdot . $suffix;
1902                                                         }
1903                                                 }
1904                                                 $nodotdot = trim( $nodotdot );
1905                                                 if( $nodotdot != '' ) {
1906                                                         $ret .= '/' . $nodotdot;
1907                                                 }
1908                                                 $ret .= $suffix;
1909                                         }
1910                                 }
1911                         }
1912                 }
1913
1914                 wfProfileOut( $fname );
1915                 return $ret;
1916         }
1917
1918         /**#@+
1919          * Used by doBlockLevels()
1920          * @private
1921          */
1922         /* private */ function closeParagraph() {
1923                 $result = '';
1924                 if ( '' != $this->mLastSection ) {
1925                         $result = '</' . $this->mLastSection  . ">\n";
1926                 }
1927                 $this->mInPre = false;
1928                 $this->mLastSection = '';
1929                 return $result;
1930         }
1931         # getCommon() returns the length of the longest common substring
1932         # of both arguments, starting at the beginning of both.
1933         #
1934         /* private */ function getCommon( $st1, $st2 ) {
1935                 $fl = strlen( $st1 );
1936                 $shorter = strlen( $st2 );
1937                 if ( $fl < $shorter ) { $shorter = $fl; }
1938
1939                 for ( $i = 0; $i < $shorter; ++$i ) {
1940                         if ( $st1{$i} != $st2{$i} ) { break; }
1941                 }
1942                 return $i;
1943         }
1944         # These next three functions open, continue, and close the list
1945         # element appropriate to the prefix character passed into them.
1946         #
1947         /* private */ function openList( $char ) {
1948                 $result = $this->closeParagraph();
1949
1950                 if ( '*' == $char ) { $result .= '<ul><li>'; }
1951                 else if ( '#' == $char ) { $result .= '<ol><li>'; }
1952                 else if ( ':' == $char ) { $result .= '<dl><dd>'; }
1953                 else if ( ';' == $char ) {
1954                         $result .= '<dl><dt>';
1955                         $this->mDTopen = true;
1956                 }
1957                 else { $result = '<!-- ERR 1 -->'; }
1958
1959                 return $result;
1960         }
1961
1962         /* private */ function nextItem( $char ) {
1963                 if ( '*' == $char || '#' == $char ) { return '</li><li>'; }
1964                 else if ( ':' == $char || ';' == $char ) {
1965                         $close = '</dd>';
1966                         if ( $this->mDTopen ) { $close = '</dt>'; }
1967                         if ( ';' == $char ) {
1968                                 $this->mDTopen = true;
1969                                 return $close . '<dt>';
1970                         } else {
1971                                 $this->mDTopen = false;
1972                                 return $close . '<dd>';
1973                         }
1974                 }
1975                 return '<!-- ERR 2 -->';
1976         }
1977
1978         /* private */ function closeList( $char ) {
1979                 if ( '*' == $char ) { $text = '</li></ul>'; }
1980                 else if ( '#' == $char ) { $text = '</li></ol>'; }
1981                 else if ( ':' == $char ) {
1982                         if ( $this->mDTopen ) {
1983                                 $this->mDTopen = false;
1984                                 $text = '</dt></dl>';
1985                         } else {
1986                                 $text = '</dd></dl>';
1987                         }
1988                 }
1989                 else {  return '<!-- ERR 3 -->'; }
1990                 return $text."\n";
1991         }
1992         /**#@-*/
1993
1994         /**
1995          * Make lists from lines starting with ':', '*', '#', etc.
1996          *
1997          * @private
1998          * @return string the lists rendered as HTML
1999          */
2000         function doBlockLevels( $text, $linestart ) {
2001                 $fname = 'Parser::doBlockLevels';
2002                 wfProfileIn( $fname );
2003
2004                 # Parsing through the text line by line.  The main thing
2005                 # happening here is handling of block-level elements p, pre,
2006                 # and making lists from lines starting with * # : etc.
2007                 #
2008                 $textLines = explode( "\n", $text );
2009
2010                 $lastPrefix = $output = '';
2011                 $this->mDTopen = $inBlockElem = false;
2012                 $prefixLength = 0;
2013                 $paragraphStack = false;
2014
2015                 if ( !$linestart ) {
2016                         $output .= array_shift( $textLines );
2017                 }
2018                 foreach ( $textLines as $oLine ) {
2019                         $lastPrefixLength = strlen( $lastPrefix );
2020                         $preCloseMatch = preg_match('/<\\/pre/i', $oLine );
2021                         $preOpenMatch = preg_match('/<pre/i', $oLine );
2022                         if ( !$this->mInPre ) {
2023                                 # Multiple prefixes may abut each other for nested lists.
2024                                 $prefixLength = strspn( $oLine, '*#:;' );
2025                                 $pref = substr( $oLine, 0, $prefixLength );
2026
2027                                 # eh?
2028                                 $pref2 = str_replace( ';', ':', $pref );
2029                                 $t = substr( $oLine, $prefixLength );
2030                                 $this->mInPre = !empty($preOpenMatch);
2031                         } else {
2032                                 # Don't interpret any other prefixes in preformatted text
2033                                 $prefixLength = 0;
2034                                 $pref = $pref2 = '';
2035                                 $t = $oLine;
2036                         }
2037
2038                         # List generation
2039                         if( $prefixLength && 0 == strcmp( $lastPrefix, $pref2 ) ) {
2040                                 # Same as the last item, so no need to deal with nesting or opening stuff
2041                                 $output .= $this->nextItem( substr( $pref, -1 ) );
2042                                 $paragraphStack = false;
2043
2044                                 if ( substr( $pref, -1 ) == ';') {
2045                                         # The one nasty exception: definition lists work like this:
2046                                         # ; title : definition text
2047                                         # So we check for : in the remainder text to split up the
2048                                         # title and definition, without b0rking links.
2049                                         $term = $t2 = '';
2050                                         if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2051                                                 $t = $t2;
2052                                                 $output .= $term . $this->nextItem( ':' );
2053                                         }
2054                                 }
2055                         } elseif( $prefixLength || $lastPrefixLength ) {
2056                                 # Either open or close a level...
2057                                 $commonPrefixLength = $this->getCommon( $pref, $lastPrefix );
2058                                 $paragraphStack = false;
2059
2060                                 while( $commonPrefixLength < $lastPrefixLength ) {
2061                                         $output .= $this->closeList( $lastPrefix{$lastPrefixLength-1} );
2062                                         --$lastPrefixLength;
2063                                 }
2064                                 if ( $prefixLength <= $commonPrefixLength && $commonPrefixLength > 0 ) {
2065                                         $output .= $this->nextItem( $pref{$commonPrefixLength-1} );
2066                                 }
2067                                 while ( $prefixLength > $commonPrefixLength ) {
2068                                         $char = substr( $pref, $commonPrefixLength, 1 );
2069                                         $output .= $this->openList( $char );
2070
2071                                         if ( ';' == $char ) {
2072                                                 # FIXME: This is dupe of code above
2073                                                 if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2074                                                         $t = $t2;
2075                                                         $output .= $term . $this->nextItem( ':' );
2076                                                 }
2077                                         }
2078                                         ++$commonPrefixLength;
2079                                 }
2080                                 $lastPrefix = $pref2;
2081                         }
2082                         if( 0 == $prefixLength ) {
2083                                 wfProfileIn( "$fname-paragraph" );
2084                                 # No prefix (not in list)--go to paragraph mode
2085                                 // XXX: use a stack for nestable elements like span, table and div
2086                                 $openmatch = preg_match('/(?:<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<pre|<tr|<p|<ul|<ol|<li|<\\/tr|<\\/td|<\\/th)/iS', $t );
2087                                 $closematch = preg_match(
2088                                         '/(?:<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6|'.
2089                                         '<td|<th|<\\/?div|<hr|<\\/pre|<\\/p|'.$this->mUniqPrefix.'-pre|<\\/li|<\\/ul|<\\/ol|<\\/?center)/iS', $t );
2090                                 if ( $openmatch or $closematch ) {
2091                                         $paragraphStack = false;
2092                                         # TODO bug 5718: paragraph closed
2093                                         $output .= $this->closeParagraph();
2094                                         if ( $preOpenMatch and !$preCloseMatch ) {
2095                                                 $this->mInPre = true;
2096                                         }
2097                                         if ( $closematch ) {
2098                                                 $inBlockElem = false;
2099                                         } else {
2100                                                 $inBlockElem = true;
2101                                         }
2102                                 } else if ( !$inBlockElem && !$this->mInPre ) {
2103                                         if ( ' ' == $t{0} and ( $this->mLastSection == 'pre' or trim($t) != '' ) ) {
2104                                                 // pre
2105                                                 if ($this->mLastSection != 'pre') {
2106                                                         $paragraphStack = false;
2107                                                         $output .= $this->closeParagraph().'<pre>';
2108                                                         $this->mLastSection = 'pre';
2109                                                 }
2110                                                 $t = substr( $t, 1 );
2111                                         } else {
2112                                                 // paragraph
2113                                                 if ( '' == trim($t) ) {
2114                                                         if ( $paragraphStack ) {
2115                                                                 $output .= $paragraphStack.'<br />';
2116                                                                 $paragraphStack = false;
2117                                                                 $this->mLastSection = 'p';
2118                                                         } else {
2119                                                                 if ($this->mLastSection != 'p' ) {
2120                                                                         $output .= $this->closeParagraph();
2121                                                                         $this->mLastSection = '';
2122                                                                         $paragraphStack = '<p>';
2123                                                                 } else {
2124                                                                         $paragraphStack = '</p><p>';
2125                                                                 }
2126                                                         }
2127                                                 } else {
2128                                                         if ( $paragraphStack ) {
2129                                                                 $output .= $paragraphStack;
2130                                                                 $paragraphStack = false;
2131                                                                 $this->mLastSection = 'p';
2132                                                         } else if ($this->mLastSection != 'p') {
2133                                                                 $output .= $this->closeParagraph().'<p>';
2134                                                                 $this->mLastSection = 'p';
2135                                                         }
2136                                                 }
2137                                         }
2138                                 }
2139                                 wfProfileOut( "$fname-paragraph" );
2140                         }
2141                         // somewhere above we forget to get out of pre block (bug 785)
2142                         if($preCloseMatch && $this->mInPre) {
2143                                 $this->mInPre = false;
2144                         }
2145                         if ($paragraphStack === false) {
2146                                 $output .= $t."\n";
2147                         }
2148                 }
2149                 while ( $prefixLength ) {
2150                         $output .= $this->closeList( $pref2{$prefixLength-1} );
2151                         --$prefixLength;
2152                 }
2153                 if ( '' != $this->mLastSection ) {
2154                         $output .= '</' . $this->mLastSection . '>';
2155                         $this->mLastSection = '';
2156                 }
2157
2158                 wfProfileOut( $fname );
2159                 return $output;
2160         }
2161
2162         /**
2163          * Split up a string on ':', ignoring any occurences inside tags
2164          * to prevent illegal overlapping.
2165          * @param string $str the string to split
2166          * @param string &$before set to everything before the ':'
2167          * @param string &$after set to everything after the ':'
2168          * return string the position of the ':', or false if none found
2169          */
2170         function findColonNoLinks($str, &$before, &$after) {
2171                 $fname = 'Parser::findColonNoLinks';
2172                 wfProfileIn( $fname );
2173
2174                 $pos = strpos( $str, ':' );
2175                 if( $pos === false ) {
2176                         // Nothing to find!
2177                         wfProfileOut( $fname );
2178                         return false;
2179                 }
2180
2181                 $lt = strpos( $str, '<' );
2182                 if( $lt === false || $lt > $pos ) {
2183                         // Easy; no tag nesting to worry about
2184                         $before = substr( $str, 0, $pos );
2185                         $after = substr( $str, $pos+1 );
2186                         wfProfileOut( $fname );
2187                         return $pos;
2188                 }
2189
2190                 // Ugly state machine to walk through avoiding tags.
2191                 $state = self::COLON_STATE_TEXT;
2192                 $stack = 0;
2193                 $len = strlen( $str );
2194                 for( $i = 0; $i < $len; $i++ ) {
2195                         $c = $str{$i};
2196
2197                         switch( $state ) {
2198                         // (Using the number is a performance hack for common cases)
2199                         case 0: // self::COLON_STATE_TEXT:
2200                                 switch( $c ) {
2201                                 case "<":
2202                                         // Could be either a <start> tag or an </end> tag
2203                                         $state = self::COLON_STATE_TAGSTART;
2204                                         break;
2205                                 case ":":
2206                                         if( $stack == 0 ) {
2207                                                 // We found it!
2208                                                 $before = substr( $str, 0, $i );
2209                                                 $after = substr( $str, $i + 1 );
2210                                                 wfProfileOut( $fname );
2211                                                 return $i;
2212                                         }
2213                                         // Embedded in a tag; don't break it.
2214                                         break;
2215                                 default:
2216                                         // Skip ahead looking for something interesting
2217                                         $colon = strpos( $str, ':', $i );
2218                                         if( $colon === false ) {
2219                                                 // Nothing else interesting
2220                                                 wfProfileOut( $fname );
2221                                                 return false;
2222                                         }
2223                                         $lt = strpos( $str, '<', $i );
2224                                         if( $stack === 0 ) {
2225                                                 if( $lt === false || $colon < $lt ) {
2226                                                         // We found it!
2227                                                         $before = substr( $str, 0, $colon );
2228                                                         $after = substr( $str, $colon + 1 );
2229                                                         wfProfileOut( $fname );
2230                                                         return $i;
2231                                                 }
2232                                         }
2233                                         if( $lt === false ) {
2234                                                 // Nothing else interesting to find; abort!
2235                                                 // We're nested, but there's no close tags left. Abort!
2236                                                 break 2;
2237                                         }
2238                                         // Skip ahead to next tag start
2239                                         $i = $lt;
2240                                         $state = self::COLON_STATE_TAGSTART;
2241                                 }
2242                                 break;
2243                         case 1: // self::COLON_STATE_TAG:
2244                                 // In a <tag>
2245                                 switch( $c ) {
2246                                 case ">":
2247                                         $stack++;
2248                                         $state = self::COLON_STATE_TEXT;
2249                                         break;
2250                                 case "/":
2251                                         // Slash may be followed by >?
2252                                         $state = self::COLON_STATE_TAGSLASH;
2253                                         break;
2254                                 default:
2255                                         // ignore
2256                                 }
2257                                 break;
2258                         case 2: // self::COLON_STATE_TAGSTART:
2259                                 switch( $c ) {
2260                                 case "/":
2261                                         $state = self::COLON_STATE_CLOSETAG;
2262                                         break;
2263                                 case "!":
2264                                         $state = self::COLON_STATE_COMMENT;
2265                                         break;
2266                                 case ">":
2267                                         // Illegal early close? This shouldn't happen D:
2268                                         $state = self::COLON_STATE_TEXT;
2269                                         break;
2270                                 default:
2271                                         $state = self::COLON_STATE_TAG;
2272                                 }
2273                                 break;
2274                         case 3: // self::COLON_STATE_CLOSETAG:
2275                                 // In a </tag>
2276                                 if( $c == ">" ) {
2277                                         $stack--;
2278                                         if( $stack < 0 ) {
2279                                                 wfDebug( "Invalid input in $fname; too many close tags\n" );
2280                                                 wfProfileOut( $fname );
2281                                                 return false;
2282                                         }
2283                                         $state = self::COLON_STATE_TEXT;
2284                                 }
2285                                 break;
2286                         case self::COLON_STATE_TAGSLASH:
2287                                 if( $c == ">" ) {
2288                                         // Yes, a self-closed tag <blah/>
2289                                         $state = self::COLON_STATE_TEXT;
2290                                 } else {
2291                                         // Probably we're jumping the gun, and this is an attribute
2292                                         $state = self::COLON_STATE_TAG;
2293                                 }
2294                                 break;
2295                         case 5: // self::COLON_STATE_COMMENT:
2296                                 if( $c == "-" ) {
2297                                         $state = self::COLON_STATE_COMMENTDASH;
2298                                 }
2299                                 break;
2300                         case self::COLON_STATE_COMMENTDASH:
2301                                 if( $c == "-" ) {
2302                                         $state = self::COLON_STATE_COMMENTDASHDASH;
2303                                 } else {
2304                                         $state = self::COLON_STATE_COMMENT;
2305                                 }
2306                                 break;
2307                         case self::COLON_STATE_COMMENTDASHDASH:
2308                                 if( $c == ">" ) {
2309                                         $state = self::COLON_STATE_TEXT;
2310                                 } else {
2311                                         $state = self::COLON_STATE_COMMENT;
2312                                 }
2313                                 break;
2314                         default:
2315                                 throw new MWException( "State machine error in $fname" );
2316                         }
2317                 }
2318                 if( $stack > 0 ) {
2319                         wfDebug( "Invalid input in $fname; not enough close tags (stack $stack, state $state)\n" );
2320                         return false;
2321                 }
2322                 wfProfileOut( $fname );
2323                 return false;
2324         }
2325
2326         /**
2327          * Return value of a magic variable (like PAGENAME)
2328          *
2329          * @private
2330          */
2331         function getVariableValue( $index ) {
2332                 global $wgContLang, $wgSitename, $wgServer, $wgServerName, $wgScriptPath;
2333
2334                 /**
2335                  * Some of these require message or data lookups and can be
2336                  * expensive to check many times.
2337                  */
2338                 static $varCache = array();
2339                 if ( wfRunHooks( 'ParserGetVariableValueVarCache', array( &$this, &$varCache ) ) ) {
2340                         if ( isset( $varCache[$index] ) ) {
2341                                 return $varCache[$index];
2342                         }
2343                 }
2344
2345                 $ts = time();
2346                 wfRunHooks( 'ParserGetVariableValueTs', array( &$this, &$ts ) );
2347
2348                 # Use the time zone
2349                 global $wgLocaltimezone;
2350                 if ( isset( $wgLocaltimezone ) ) {
2351                         $oldtz = getenv( 'TZ' );
2352                         putenv( 'TZ='.$wgLocaltimezone );
2353                 }
2354
2355                 wfSuppressWarnings(); // E_STRICT system time bitching
2356                 $localTimestamp = date( 'YmdHis', $ts );
2357                 $localMonth = date( 'm', $ts );
2358                 $localMonthName = date( 'n', $ts );
2359                 $localDay = date( 'j', $ts );
2360                 $localDay2 = date( 'd', $ts );
2361                 $localDayOfWeek = date( 'w', $ts );
2362                 $localWeek = date( 'W', $ts );
2363                 $localYear = date( 'Y', $ts );
2364                 $localHour = date( 'H', $ts );
2365                 if ( isset( $wgLocaltimezone ) ) {
2366                         putenv( 'TZ='.$oldtz );
2367                 }
2368                 wfRestoreWarnings();
2369
2370                 switch ( $index ) {
2371                         case 'currentmonth':
2372                                 return $varCache[$index] = $wgContLang->formatNum( gmdate( 'm', $ts ) );
2373                         case 'currentmonthname':
2374                                 return $varCache[$index] = $wgContLang->getMonthName( gmdate( 'n', $ts ) );
2375                         case 'currentmonthnamegen':
2376                                 return $varCache[$index] = $wgContLang->getMonthNameGen( gmdate( 'n', $ts ) );
2377                         case 'currentmonthabbrev':
2378                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( gmdate( 'n', $ts ) );
2379                         case 'currentday':
2380                                 return $varCache[$index] = $wgContLang->formatNum( gmdate( 'j', $ts ) );
2381                         case 'currentday2':
2382                                 return $varCache[$index] = $wgContLang->formatNum( gmdate( 'd', $ts ) );
2383                         case 'localmonth':
2384                                 return $varCache[$index] = $wgContLang->formatNum( $localMonth );
2385                         case 'localmonthname':
2386                                 return $varCache[$index] = $wgContLang->getMonthName( $localMonthName );
2387                         case 'localmonthnamegen':
2388                                 return $varCache[$index] = $wgContLang->getMonthNameGen( $localMonthName );
2389                         case 'localmonthabbrev':
2390                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( $localMonthName );
2391                         case 'localday':
2392                                 return $varCache[$index] = $wgContLang->formatNum( $localDay );
2393                         case 'localday2':
2394                                 return $varCache[$index] = $wgContLang->formatNum( $localDay2 );
2395                         case 'pagename':
2396                                 return wfEscapeWikiText( $this->mTitle->getText() );
2397                         case 'pagenamee':
2398                                 return $this->mTitle->getPartialURL();
2399                         case 'fullpagename':
2400                                 return wfEscapeWikiText( $this->mTitle->getPrefixedText() );
2401                         case 'fullpagenamee':
2402                                 return $this->mTitle->getPrefixedURL();
2403                         case 'subpagename':
2404                                 return wfEscapeWikiText( $this->mTitle->getSubpageText() );
2405                         case 'subpagenamee':
2406                                 return $this->mTitle->getSubpageUrlForm();
2407                         case 'basepagename':
2408                                 return wfEscapeWikiText( $this->mTitle->getBaseText() );
2409                         case 'basepagenamee':
2410                                 return wfUrlEncode( str_replace( ' ', '_', $this->mTitle->getBaseText() ) );
2411                         case 'talkpagename':
2412                                 if( $this->mTitle->canTalk() ) {
2413                                         $talkPage = $this->mTitle->getTalkPage();
2414                                         return wfEscapeWikiText( $talkPage->getPrefixedText() );
2415                                 } else {
2416                                         return '';
2417                                 }
2418                         case 'talkpagenamee':
2419                                 if( $this->mTitle->canTalk() ) {
2420                                         $talkPage = $this->mTitle->getTalkPage();
2421                                         return $talkPage->getPrefixedUrl();
2422                                 } else {
2423                                         return '';
2424                                 }
2425                         case 'subjectpagename':
2426                                 $subjPage = $this->mTitle->getSubjectPage();
2427                                 return wfEscapeWikiText( $subjPage->getPrefixedText() );
2428                         case 'subjectpagenamee':
2429                                 $subjPage = $this->mTitle->getSubjectPage();
2430                                 return $subjPage->getPrefixedUrl();
2431                         case 'revisionid':
2432                                 // Let the edit saving system know we should parse the page
2433                                 // *after* a revision ID has been assigned.
2434                                 $this->mOutput->setFlag( 'vary-revision' );
2435                                 wfDebug( __METHOD__ . ": {{REVISIONID}} used, setting vary-revision...\n" );
2436                                 return $this->mRevisionId;
2437                         case 'revisionday':
2438                                 return intval( substr( $this->getRevisionTimestamp(), 6, 2 ) );
2439                         case 'revisionday2':
2440                                 return substr( $this->getRevisionTimestamp(), 6, 2 );
2441                         case 'revisionmonth':
2442                                 return intval( substr( $this->getRevisionTimestamp(), 4, 2 ) );
2443                         case 'revisionyear':
2444                                 return substr( $this->getRevisionTimestamp(), 0, 4 );
2445                         case 'revisiontimestamp':
2446                                 return $this->getRevisionTimestamp();
2447                         case 'namespace':
2448                                 return str_replace('_',' ',$wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2449                         case 'namespacee':
2450                                 return wfUrlencode( $wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2451                         case 'talkspace':
2452                                 return $this->mTitle->canTalk() ? str_replace('_',' ',$this->mTitle->getTalkNsText()) : '';
2453                         case 'talkspacee':
2454                                 return $this->mTitle->canTalk() ? wfUrlencode( $this->mTitle->getTalkNsText() ) : '';
2455                         case 'subjectspace':
2456                                 return $this->mTitle->getSubjectNsText();
2457                         case 'subjectspacee':
2458                                 return( wfUrlencode( $this->mTitle->getSubjectNsText() ) );
2459                         case 'currentdayname':
2460                                 return $varCache[$index] = $wgContLang->getWeekdayName( gmdate( 'w', $ts ) + 1 );
2461                         case 'currentyear':
2462                                 return $varCache[$index] = $wgContLang->formatNum( gmdate( 'Y', $ts ), true );
2463                         case 'currenttime':
2464                                 return $varCache[$index] = $wgContLang->time( wfTimestamp( TS_MW, $ts ), false, false );
2465                         case 'currenthour':
2466                                 return $varCache[$index] = $wgContLang->formatNum( gmdate( 'H', $ts ), true );
2467                         case 'currentweek':
2468                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2469                                 // int to remove the padding
2470                                 return $varCache[$index] = $wgContLang->formatNum( (int)gmdate( 'W', $ts ) );
2471                         case 'currentdow':
2472                                 return $varCache[$index] = $wgContLang->formatNum( gmdate( 'w', $ts ) );
2473                         case 'localdayname':
2474                                 return $varCache[$index] = $wgContLang->getWeekdayName( $localDayOfWeek + 1 );
2475                         case 'localyear':
2476                                 return $varCache[$index] = $wgContLang->formatNum( $localYear, true );
2477                         case 'localtime':
2478                                 return $varCache[$index] = $wgContLang->time( $localTimestamp, false, false );
2479                         case 'localhour':
2480                                 return $varCache[$index] = $wgContLang->formatNum( $localHour, true );
2481                         case 'localweek':
2482                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2483                                 // int to remove the padding
2484                                 return $varCache[$index] = $wgContLang->formatNum( (int)$localWeek );
2485                         case 'localdow':
2486                                 return $varCache[$index] = $wgContLang->formatNum( $localDayOfWeek );
2487                         case 'numberofarticles':
2488                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::articles() );
2489                         case 'numberoffiles':
2490                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::images() );
2491                         case 'numberofusers':
2492                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::users() );
2493                         case 'numberofpages':
2494                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::pages() );
2495                         case 'numberofadmins':
2496                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::admins() );
2497                         case 'numberofedits':
2498                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::edits() );
2499                         case 'currenttimestamp':
2500                                 return $varCache[$index] = wfTimestampNow();
2501                         case 'localtimestamp':
2502                                 return $varCache[$index] = $localTimestamp;
2503                         case 'currentversion':
2504                                 return $varCache[$index] = SpecialVersion::getVersion();
2505                         case 'sitename':
2506                                 return $wgSitename;
2507                         case 'server':
2508                                 return $wgServer;
2509                         case 'servername':
2510                                 return $wgServerName;
2511                         case 'scriptpath':
2512                                 return $wgScriptPath;
2513                         case 'directionmark':
2514                                 return $wgContLang->getDirMark();
2515                         case 'contentlanguage':
2516                                 global $wgContLanguageCode;
2517                                 return $wgContLanguageCode;
2518                         default:
2519                                 $ret = null;
2520                                 if ( wfRunHooks( 'ParserGetVariableValueSwitch', array( &$this, &$varCache, &$index, &$ret ) ) )
2521                                         return $ret;
2522                                 else
2523                                         return null;
2524                 }
2525         }
2526
2527         /**
2528          * initialise the magic variables (like CURRENTMONTHNAME)
2529          *
2530          * @private
2531          */
2532         function initialiseVariables() {
2533                 $fname = 'Parser::initialiseVariables';
2534                 wfProfileIn( $fname );
2535                 $variableIDs = MagicWord::getVariableIDs();
2536
2537                 $this->mVariables = new MagicWordArray( $variableIDs );
2538                 wfProfileOut( $fname );
2539         }
2540
2541         /**
2542          * Preprocess some wikitext and return the document tree.
2543          * This is the ghost of replace_variables().
2544          *
2545          * @param string $text The text to parse
2546          * @param integer flags Bitwise combination of:
2547          *          self::PTD_FOR_INCLUSION    Handle <noinclude>/<includeonly> as if the text is being
2548          *                                     included. Default is to assume a direct page view.
2549          *
2550          * The generated DOM tree must depend only on the input text, the flags, and $this->ot['msg'].
2551          * The DOM tree must be the same in OT_HTML and OT_WIKI mode, to avoid a regression of bug 4899.
2552          *
2553          * Any flag added to the $flags parameter here, or any other parameter liable to cause a
2554          * change in the DOM tree for a given text, must be passed through the section identifier
2555          * in the section edit link and thus back to extractSections().
2556          *
2557          * The output of this function is currently only cached in process memory, but a persistent
2558          * cache may be implemented at a later date which takes further advantage of these strict
2559          * dependency requirements.
2560          *
2561          * @private
2562          */
2563         function preprocessToDom ( $text, $flags = 0 ) {
2564                 wfProfileIn( __METHOD__ );
2565                 wfProfileIn( __METHOD__.'-makexml' );
2566
2567                 static $msgRules, $normalRules, $inclusionSupertags, $nonInclusionSupertags;
2568                 if ( !$msgRules ) {
2569                         $msgRules = array(
2570                                 '{' => array(
2571                                         'end' => '}',
2572                                         'names' => array(
2573                                                 2 => 'template',
2574                                         ),
2575                                         'min' => 2,
2576                                         'max' => 2,
2577                                 ),
2578                                 '[' => array(
2579                                         'end' => ']',
2580                                         'names' => array( 2 => null ),
2581                                         'min' => 2,
2582                                         'max' => 2,
2583                                 )
2584                         );
2585                         $normalRules = array(
2586                                 '{' => array(
2587                                         'end' => '}',
2588                                         'names' => array(
2589                                                 2 => 'template',
2590                                                 3 => 'tplarg',
2591                                         ),
2592                                         'min' => 2,
2593                                         'max' => 3,
2594                                 ),
2595                                 '[' => array(
2596                                         'end' => ']',
2597                                         'names' => array( 2 => null ),
2598                                         'min' => 2,
2599                                         'max' => 2,
2600                                 )
2601                         );
2602                 }
2603                 if ( $this->ot['msg'] ) {
2604                         $rules = $msgRules;
2605                 } else {
2606                         $rules = $normalRules;
2607                 }
2608                 $forInclusion = $flags & self::PTD_FOR_INCLUSION;
2609
2610                 $xmlishElements = $this->getStripList();
2611                 $enableOnlyinclude = false;
2612                 if ( $forInclusion ) {
2613                         $ignoredTags = array( 'includeonly', '/includeonly' );
2614                         $ignoredElements = array( 'noinclude' );
2615                         $xmlishElements[] = 'noinclude';
2616                         if ( strpos( $text, '<onlyinclude>' ) !== false && strpos( $text, '</onlyinclude>' ) !== false ) {
2617                                 $enableOnlyinclude = true;
2618                         }
2619                 } else {
2620                         $ignoredTags = array( 'noinclude', '/noinclude', 'onlyinclude', '/onlyinclude' );
2621                         $ignoredElements = array( 'includeonly' );
2622                         $xmlishElements[] = 'includeonly';
2623                 }
2624                 $xmlishRegex = implode( '|', array_merge( $xmlishElements, $ignoredTags ) );
2625
2626                 // Use "A" modifier (anchored) instead of "^", because ^ doesn't work with an offset
2627                 $elementsRegex = "~($xmlishRegex)(?:\s|\/>|>)|(!--)~iA";
2628
2629                 $stack = array();      # Stack of unclosed parentheses
2630                 $stackIndex = -1;      # Stack read pointer
2631
2632                 $searchBase = implode( '', array_keys( $rules ) ) . '<';
2633                 $revText = strrev( $text ); // For fast reverse searches
2634
2635                 $i = -1; # Input pointer, starts out pointing to a pseudo-newline before the start
2636                 $topAccum = '<root>';      # Top level text accumulator
2637                 $accum =& $topAccum;            # Current text accumulator
2638                 $findEquals = false;            # True to find equals signs in arguments
2639                 $findHeading = false;           # True to look at LF characters for possible headings
2640                 $findPipe = false;              # True to take notice of pipe characters
2641                 $headingIndex = 1;
2642                 $noMoreGT = false;         # True if there are no more greater-than (>) signs right of $i
2643                 $findOnlyinclude = $enableOnlyinclude; # True to ignore all input up to the next <onlyinclude>
2644
2645                 if ( $enableOnlyinclude ) {
2646                         $i = 0;
2647                 }
2648
2649                 while ( true ) {
2650                         if ( $findOnlyinclude ) {
2651                                 // Ignore all input up to the next <onlyinclude>
2652                                 $startPos = strpos( $text, '<onlyinclude>', $i );
2653                                 if ( $startPos === false ) {
2654                                         // Ignored section runs to the end
2655                                         $accum .= '<ignore>' . htmlspecialchars( substr( $text, $i ) ) . '</ignore>';
2656                                         break;
2657                                 }
2658                                 $tagEndPos = $startPos + strlen( '<onlyinclude>' ); // past-the-end
2659                                 $accum .= '<ignore>' . htmlspecialchars( substr( $text, $i, $tagEndPos - $i ) ) . '</ignore>';
2660                                 $i = $tagEndPos;
2661                                 $findOnlyinclude = false;
2662                         }
2663
2664                         if ( $i == -1 ) {
2665                                 $found = 'line-start';
2666                                 $curChar = '';
2667                         } else {
2668                                 # Find next opening brace, closing brace or pipe
2669                                 $search = $searchBase;
2670                                 if ( $stackIndex == -1 ) {
2671                                         $currentClosing = '';
2672                                         // Look for headings only at the top stack level
2673                                         // Among other things, this resolves the ambiguity between =
2674                                         // for headings and = for template arguments
2675                                         $search .= "\n";
2676                                 } else {
2677                                         $currentClosing = $stack[$stackIndex]['close'];
2678                                         $search .= $currentClosing;
2679                                 }
2680                                 if ( $findPipe ) {
2681                                         $search .= '|';
2682                                 }
2683                                 if ( $findEquals ) {
2684                                         $search .= '=';
2685                                 }
2686                                 $rule = null;
2687                                 # Output literal section, advance input counter
2688                                 $literalLength = strcspn( $text, $search, $i );
2689                                 if ( $literalLength > 0 ) {
2690                                         $accum .= htmlspecialchars( substr( $text, $i, $literalLength ) );
2691                                         $i += $literalLength;
2692                                 }
2693                                 if ( $i >= strlen( $text ) ) {
2694                                         if ( $currentClosing == "\n" ) {
2695                                                 // Do a past-the-end run to finish off the heading
2696                                                 $curChar = '';
2697                                                 $found = 'line-end';
2698                                         } else {
2699                                                 # All done
2700                                                 break;
2701                                         }
2702                                 } else {
2703                                         $curChar = $text[$i];
2704                                         if ( $curChar == '|' ) {
2705                                                 $found = 'pipe';
2706                                         } elseif ( $curChar == '=' ) {
2707                                                 $found = 'equals';
2708                                         } elseif ( $curChar == '<' ) {
2709                                                 $found = 'angle';
2710                                         } elseif ( $curChar == "\n" ) {
2711                                                 if ( $stackIndex == -1 ) {
2712                                                         $found = 'line-start';
2713                                                 } else {
2714                                                         $found = 'line-end';
2715                                                 }
2716                                         } elseif ( $curChar == $currentClosing ) {
2717                                                 $found = 'close';
2718                                         } elseif ( isset( $rules[$curChar] ) ) {
2719                                                 $found = 'open';
2720                                                 $rule = $rules[$curChar];
2721                                         } else {
2722                                                 # Some versions of PHP have a strcspn which stops on null characters
2723                                                 # Ignore and continue
2724                                                 ++$i;
2725                                                 continue;
2726                                         }
2727                                 }
2728                         }
2729
2730                         if ( $found == 'angle' ) {
2731                                 $matches = false;
2732                                 // Handle </onlyinclude>
2733                                 if ( $enableOnlyinclude && substr( $text, $i, strlen( '</onlyinclude>' ) ) == '</onlyinclude>' ) {
2734                                         $findOnlyinclude = true;
2735                                         continue;
2736                                 }
2737
2738                                 // Determine element name
2739                                 if ( !preg_match( $elementsRegex, $text, $matches, 0, $i + 1 ) ) {
2740                                         // Element name missing or not listed
2741                                         $accum .= '&lt;';
2742                                         ++$i;
2743                                         continue;
2744                                 }
2745                                 // Handle comments
2746                                 if ( isset( $matches[2] ) && $matches[2] == '!--' ) {
2747                                         // To avoid leaving blank lines, when a comment is both preceded
2748                                         // and followed by a newline (ignoring spaces), trim leading and
2749                                         // trailing spaces and one of the newlines.
2750
2751                                         // Find the end
2752                                         $endPos = strpos( $text, '-->', $i + 4 );
2753                                         if ( $endPos === false ) {
2754                                                 // Unclosed comment in input, runs to end
2755                                                 $inner = substr( $text, $i );
2756                                                 $accum .= '<comment>' . htmlspecialchars( $inner ) . '</comment>';
2757                                                 $i = strlen( $text );
2758                                         } else {
2759                                                 // Search backwards for leading whitespace
2760                                                 $wsStart = $i ? ( $i - strspn( $revText, ' ', strlen( $text ) - $i - 1 ) ) : 0;
2761                                                 // Search forwards for trailing whitespace
2762                                                 // $wsEnd will be the position of the last space
2763                                                 $wsEnd = $endPos + 2 + strspn( $text, ' ', $endPos + 3 );
2764                                                 // Eat the line if possible
2765                                                 if ( $wsStart > 0 && substr( $text, $wsStart - 1, 1 ) == "\n"
2766                                                         && substr( $text, $wsEnd + 1, 1 ) == "\n" )
2767                                                 {
2768                                                         $startPos = $wsStart;
2769                                                         $endPos = $wsEnd + 1;
2770                                                 } else {
2771                                                         // No line to eat, just take the comment itself
2772                                                         $startPos = $i;
2773                                                         $endPos += 2;
2774                                                 }
2775                                                 $inner = substr( $text, $startPos, $endPos - $startPos + 1 );
2776                                                 $accum .= '<comment>' . htmlspecialchars( $inner ) . '</comment>';
2777                                                 $i = $endPos + 1;
2778                                         }
2779                                         continue;
2780                                 }
2781                                 $name = $matches[1];
2782                                 $attrStart = $i + strlen( $name ) + 1;
2783
2784                                 // Find end of tag
2785                                 $tagEndPos = $noMoreGT ? false : strpos( $text, '>', $attrStart );
2786                                 if ( $tagEndPos === false ) {
2787                                         // Infinite backtrack
2788                                         // Disable tag search to prevent worst-case O(N^2) performance
2789                                         $noMoreGT = true;
2790                                         $accum .= '&lt;';
2791                                         ++$i;
2792                                         continue;
2793                                 }
2794
2795                                 // Handle ignored tags
2796                                 if ( in_array( $name, $ignoredTags ) ) {
2797                                         $accum .= '<ignore>' . htmlspecialchars( substr( $text, $i, $tagEndPos - $i + 1 ) ) . '</ignore>';
2798                                         $i = $tagEndPos + 1;
2799                                         continue;
2800                                 }
2801
2802                                 $tagStartPos = $i;
2803                                 if ( $text[$tagEndPos-1] == '/' ) {
2804                                         $attrEnd = $tagEndPos - 1;
2805                                         $inner = null;
2806                                         $i = $tagEndPos + 1;
2807                                         $close = '';
2808                                 } else {
2809                                         $attrEnd = $tagEndPos;
2810                                         // Find closing tag
2811                                         if ( preg_match( "/<\/$name\s*>/i", $text, $matches, PREG_OFFSET_CAPTURE, $tagEndPos + 1 ) ) {
2812                                                 $inner = substr( $text, $tagEndPos + 1, $matches[0][1] - $tagEndPos - 1 );
2813                                                 $i = $matches[0][1] + strlen( $matches[0][0] );
2814                                                 $close = '<close>' . htmlspecialchars( $matches[0][0] ) . '</close>';
2815                                         } else {
2816                                                 // No end tag -- let it run out to the end of the text.
2817                                                 $inner = substr( $text, $tagEndPos + 1 );
2818                                                 $i = strlen( $text );
2819                                                 $close = '';
2820                                         }
2821                                 }
2822                                 // <includeonly> and <noinclude> just become <ignore> tags
2823                                 if ( in_array( $name, $ignoredElements ) ) {
2824                                         $accum .= '<ignore>' . htmlspecialchars( substr( $text, $tagStartPos, $i - $tagStartPos ) )
2825                                                 . '</ignore>';
2826                                         continue;
2827                                 }
2828
2829                                 $accum .= '<ext>';
2830                                 if ( $attrEnd <= $attrStart ) {
2831                                         $attr = '';
2832                                 } else {
2833                                         $attr = substr( $text, $attrStart, $attrEnd - $attrStart );
2834                                 }
2835                                 $accum .= '<name>' . htmlspecialchars( $name ) . '</name>' .
2836                                         // Note that the attr element contains the whitespace between name and attribute,
2837                                         // this is necessary for precise reconstruction during pre-save transform.
2838                                         '<attr>' . htmlspecialchars( $attr ) . '</attr>';
2839                                 if ( $inner !== null ) {
2840                                         $accum .= '<inner>' . htmlspecialchars( $inner ) . '</inner>';
2841                                 }
2842                                 $accum .= $close . '</ext>';
2843                         }
2844
2845                         elseif ( $found == 'line-start' ) {
2846                                 // Is this the start of a heading?
2847                                 // Line break belongs before the heading element in any case
2848                                 $accum .= $curChar;
2849                                 $i++;
2850
2851                                 $count = strspn( $text, '=', $i, 6 );
2852                                 if ( $count > 0 ) {
2853                                         $piece = array(
2854                                                 'open' => "\n",
2855                                                 'close' => "\n",
2856                                                 'parts' => array( str_repeat( '=', $count ) ),
2857                                                 'count' => $count );
2858                                         $stack[++$stackIndex] = $piece;
2859                                         $i += $count;
2860                                         $accum =& $stack[$stackIndex]['parts'][0];
2861                                         $findPipe = false;
2862                                 }
2863                         }
2864
2865                         elseif ( $found == 'line-end' ) {
2866                                 $piece = $stack[$stackIndex];
2867                                 // A heading must be open, otherwise \n wouldn't have been in the search list
2868                                 assert( $piece['open'] == "\n" );
2869                                 assert( $stackIndex == 0 );
2870                                 // Search back through the input to see if it has a proper close
2871                                 // Do this using the reversed string since the other solutions (end anchor, etc.) are inefficient
2872                                 $m = false;
2873                                 $count = $piece['count'];
2874                                 if ( preg_match( "/\s*(={{$count}})/A", $revText, $m, 0, strlen( $text ) - $i ) ) {
2875                                         // Found match, output <h>
2876                                         $count = min( strlen( $m[1] ), $count );
2877                                         $element = "<h level=\"$count\" i=\"$headingIndex\">$accum</h>";
2878                                         $headingIndex++;
2879                                 } else {
2880                                         // No match, no <h>, just pass down the inner text
2881                                         $element = $accum;
2882                                 }
2883                                 // Unwind the stack
2884                                 // Headings can only occur on the top level, so this is a bit simpler than the
2885                                 // generic stack unwind operation in the close case
2886                                 unset( $stack[$stackIndex--] );
2887                                 $accum =& $topAccum;
2888                                 $findEquals = false;
2889                                 $findPipe = false;
2890
2891                                 // Append the result to the enclosing accumulator
2892                                 $accum .= $element;
2893                                 // Note that we do NOT increment the input pointer.
2894                                 // This is because the closing linebreak could be the opening linebreak of
2895                                 // another heading. Infinite loops are avoided because the next iteration MUST
2896                                 // hit the heading open case above, which unconditionally increments the
2897                                 // input pointer.
2898                         }
2899
2900                         elseif ( $found == 'open' ) {
2901                                 # count opening brace characters
2902                                 $count = strspn( $text, $curChar, $i );
2903
2904                                 # we need to add to stack only if opening brace count is enough for one of the rules
2905                                 if ( $count >= $rule['min'] ) {
2906                                         # Add it to the stack
2907                                         $piece = array(
2908                                                 'open' => $curChar,
2909                                                 'close' => $rule['end'],
2910                                                 'count' => $count,
2911                                                 'parts' => array( '' ),
2912                                                 'eqpos' => array(),
2913                                                 'lineStart' => ($i > 0 && $text[$i-1] == "\n"),
2914                                         );
2915
2916                                         $stackIndex ++;
2917                                         $stack[$stackIndex] = $piece;
2918                                         $accum =& $stack[$stackIndex]['parts'][0];
2919                                         $findEquals = false;
2920                                         $findPipe = true;
2921                                 } else {
2922                                         # Add literal brace(s)
2923                                         $accum .= htmlspecialchars( str_repeat( $curChar, $count ) );
2924                                 }
2925                                 $i += $count;
2926                         }
2927
2928                         elseif ( $found == 'close' ) {
2929                                 $piece = $stack[$stackIndex];
2930                                 # lets check if there are enough characters for closing brace
2931                                 $maxCount = $piece['count'];
2932                                 $count = strspn( $text, $curChar, $i, $maxCount );
2933
2934                                 # check for maximum matching characters (if there are 5 closing
2935                                 # characters, we will probably need only 3 - depending on the rules)
2936                                 $matchingCount = 0;
2937                                 $rule = $rules[$piece['open']];
2938                                 if ( $count > $rule['max'] ) {
2939                                         # The specified maximum exists in the callback array, unless the caller
2940                                         # has made an error
2941                                         $matchingCount = $rule['max'];
2942                                 } else {
2943                                         # Count is less than the maximum
2944                                         # Skip any gaps in the callback array to find the true largest match
2945                                         # Need to use array_key_exists not isset because the callback can be null
2946                                         $matchingCount = $count;
2947                                         while ( $matchingCount > 0 && !array_key_exists( $matchingCount, $rule['names'] ) ) {
2948                                                 --$matchingCount;
2949                                         }
2950                                 }
2951
2952                                 if ($matchingCount <= 0) {
2953                                         # No matching element found in callback array
2954                                         # Output a literal closing brace and continue
2955                                         $accum .= htmlspecialchars( str_repeat( $curChar, $count ) );
2956                                         $i += $count;
2957                                         continue;
2958                                 }
2959                                 $name = $rule['names'][$matchingCount];
2960                                 if ( $name === null ) {
2961                                         // No element, just literal text
2962                                         $element = str_repeat( $piece['open'], $matchingCount ) .
2963                                                 implode( '|', $piece['parts'] ) .
2964                                                 str_repeat( $rule['end'], $matchingCount );
2965                                 } else {
2966                                         # Create XML element
2967                                         # Note: $parts is already XML, does not need to be encoded further
2968                                         $parts = $piece['parts'];
2969                                         $title = $parts[0];
2970                                         unset( $parts[0] );
2971
2972                                         # The invocation is at the start of the line if lineStart is set in
2973                                         # the stack, and all opening brackets are used up.
2974                                         if ( $maxCount == $matchingCount && !empty( $piece['lineStart'] ) ) {
2975                                                 $attr = ' lineStart="1"';
2976                                         } else {
2977                                                 $attr = '';
2978                                         }
2979
2980                                         $element = "<$name$attr>";
2981                                         $element .= "<title>$title</title>";
2982                                         $argIndex = 1;
2983                                         foreach ( $parts as $partIndex => $part ) {
2984                                                 if ( isset( $piece['eqpos'][$partIndex] ) ) {
2985                                                         $eqpos = $piece['eqpos'][$partIndex];
2986                                                         list( $ws1, $argName, $ws2 ) = self::splitWhitespace( substr( $part, 0, $eqpos ) );
2987                                                         list( $ws3, $argValue, $ws4 ) = self::splitWhitespace( substr( $part, $eqpos + 1 ) );
2988                                                         $element .= "<part>$ws1<name>$argName</name>$ws2=$ws3<value>$argValue</value>$ws4</part>";
2989                                                 } else {
2990                                                         list( $ws1, $value, $ws2 ) = self::splitWhitespace( $part );
2991                                                         $element .= "<part>$ws1<name index=\"$argIndex\" /><value>$value</value>$ws2</part>";
2992                                                         $argIndex++;
2993                                                 }
2994                                         }
2995                                         $element .= "</$name>";
2996                                 }
2997
2998                                 # Advance input pointer
2999                                 $i += $matchingCount;
3000
3001                                 # Unwind the stack
3002                                 unset( $stack[$stackIndex--] );
3003                                 if ( $stackIndex == -1 ) {
3004                                         $accum =& $topAccum;
3005                                         $findEquals = false;
3006                                         $findPipe = false;
3007                                 } else {
3008                                         $partCount = count( $stack[$stackIndex]['parts'] );
3009                                         $accum =& $stack[$stackIndex]['parts'][$partCount - 1];
3010                                         $findPipe = $stack[$stackIndex]['open'] != "\n";
3011                                         $findEquals = $findPipe && $partCount > 1
3012                                                 && !isset( $stack[$stackIndex]['eqpos'][$partCount - 1] );
3013                                 }
3014
3015                                 # Re-add the old stack element if it still has unmatched opening characters remaining
3016                                 if ($matchingCount < $piece['count']) {
3017                                         $piece['parts'] = array( '' );
3018                                         $piece['count'] -= $matchingCount;
3019                                         $piece['eqpos'] = array();
3020                                         # do we still qualify for any callback with remaining count?
3021                                         $names = $rules[$piece['open']]['names'];
3022                                         $skippedBraces = 0;
3023                                         $enclosingAccum =& $accum;
3024                                         while ( $piece['count'] ) {
3025                                                 if ( array_key_exists( $piece['count'], $names ) ) {
3026                                                         $stackIndex++;
3027                                                         $stack[$stackIndex] = $piece;
3028                                                         $accum =& $stack[$stackIndex]['parts'][0];
3029                                                         $findEquals = true;
3030                                                         $findPipe = true;
3031                                                         break;
3032                                                 }
3033                                                 --$piece['count'];
3034                                                 $skippedBraces ++;
3035                                         }
3036                                         $enclosingAccum .= str_repeat( $piece['open'], $skippedBraces );
3037                                 }
3038
3039                                 # Add XML element to the enclosing accumulator
3040                                 $accum .= $element;
3041                         }
3042
3043                         elseif ( $found == 'pipe' ) {
3044                                 $stack[$stackIndex]['parts'][] = '';
3045                                 $partsCount = count( $stack[$stackIndex]['parts'] );
3046                                 $accum =& $stack[$stackIndex]['parts'][$partsCount - 1];
3047                                 $findEquals = true;
3048                                 ++$i;
3049                         }
3050
3051                         elseif ( $found == 'equals' ) {
3052                                 $findEquals = false;
3053                                 $partsCount = count( $stack[$stackIndex]['parts'] );
3054                                 $stack[$stackIndex]['eqpos'][$partsCount - 1] = strlen( $accum );
3055                                 $accum .= '=';
3056                                 ++$i;
3057                         }
3058                 }
3059
3060                 # Output any remaining unclosed brackets
3061                 foreach ( $stack as $piece ) {
3062                         if ( $piece['open'] == "\n" ) {
3063                                 $topAccum .= $piece['parts'][0];
3064                         } else {
3065                                 $topAccum .= str_repeat( $piece['open'], $piece['count'] ) . implode( '|', $piece['parts'] );
3066                         }
3067                 }
3068                 $topAccum .= '</root>';
3069
3070                 wfProfileOut( __METHOD__.'-makexml' );
3071                 wfProfileIn( __METHOD__.'-loadXML' );
3072                 $dom = new DOMDocument;
3073                 wfSuppressWarnings();
3074                 $result = $dom->loadXML( $topAccum );
3075                 wfRestoreWarnings();
3076                 if ( !$result ) {
3077                         // Try running the XML through UtfNormal to get rid of invalid characters
3078                         $topAccum = UtfNormal::cleanUp( $topAccum );
3079                         $result = $dom->loadXML( $topAccum );
3080                         if ( !$result ) {
3081                                 throw new MWException( __METHOD__.' generated invalid XML' );
3082                         }
3083                 }
3084                 wfProfileOut( __METHOD__.'-loadXML' );
3085                 wfProfileOut( __METHOD__ );
3086                 return $dom;
3087         }
3088
3089         /*
3090          * Return a three-element array: leading whitespace, string contents, trailing whitespace
3091          */
3092         public static function splitWhitespace( $s ) {
3093                 $ltrimmed = ltrim( $s );
3094                 $w1 = substr( $s, 0, strlen( $s ) - strlen( $ltrimmed ) );
3095                 $trimmed = rtrim( $ltrimmed );
3096                 $diff = strlen( $ltrimmed ) - strlen( $trimmed );
3097                 if ( $diff > 0 ) {
3098                         $w2 = substr( $ltrimmed, -$diff );
3099                 } else {
3100                         $w2 = '';
3101                 }
3102                 return array( $w1, $trimmed, $w2 );
3103         }
3104
3105         /**
3106          * Replace magic variables, templates, and template arguments
3107          * with the appropriate text. Templates are substituted recursively,
3108          * taking care to avoid infinite loops.
3109          *
3110          * Note that the substitution depends on value of $mOutputType:
3111          *  OT_WIKI: only {{subst:}} templates
3112          *  OT_MSG: only magic variables
3113          *  OT_HTML: all templates and magic variables
3114          *
3115          * @param string $tex The text to transform
3116          * @param PPFrame $frame Object describing the arguments passed to the template
3117          * @param bool $argsOnly Only do argument (triple-brace) expansion, not double-brace expansion
3118          * @private
3119          */
3120         function replaceVariables( $text, $frame = false, $argsOnly = false ) {
3121                 # Prevent too big inclusions
3122                 if( strlen( $text ) > $this->mOptions->getMaxIncludeSize() ) {
3123                         return $text;
3124                 }
3125
3126                 $fname = __METHOD__;
3127                 wfProfileIn( $fname );
3128
3129                 if ( $frame === false ) {
3130                         $frame = new PPFrame( $this );
3131                 } elseif ( !( $frame instanceof PPFrame ) ) {
3132                         throw new MWException( __METHOD__ . ' called using the old argument format' );
3133                 }
3134
3135                 $dom = $this->preprocessToDom( $text );
3136                 $flags = $argsOnly ? PPFrame::NO_TEMPLATES : 0;
3137                 $text = $frame->expand( $dom, $flags );
3138
3139                 wfProfileOut( $fname );
3140                 return $text;
3141         }
3142
3143         /// Clean up argument array - refactored in 1.9 so parserfunctions can use it, too.
3144         static function createAssocArgs( $args ) {
3145                 $assocArgs = array();
3146                 $index = 1;
3147                 foreach( $args as $arg ) {
3148                         $eqpos = strpos( $arg, '=' );
3149                         if ( $eqpos === false ) {
3150                                 $assocArgs[$index++] = $arg;
3151                         } else {
3152                                 $name = trim( substr( $arg, 0, $eqpos ) );
3153                                 $value = trim( substr( $arg, $eqpos+1 ) );
3154                                 if ( $value === false ) {
3155                                         $value = '';
3156                                 }
3157                                 if ( $name !== false ) {
3158                                         $assocArgs[$name] = $value;
3159                                 }
3160                         }
3161                 }
3162
3163                 return $assocArgs;
3164         }
3165
3166         /**
3167          * Return the text of a template, after recursively
3168          * replacing any variables or templates within the template.
3169          *
3170          * @param array $piece The parts of the template
3171          *  $piece['text']: matched text
3172          *  $piece['title']: the title, i.e. the part before the |
3173          *  $piece['parts']: the parameter array
3174          * @param PPFrame The current frame, contains template arguments
3175          * @return string the text of the template
3176          * @private
3177          */
3178         function braceSubstitution( $piece, $frame ) {
3179                 global $wgContLang, $wgLang, $wgAllowDisplayTitle, $wgNonincludableNamespaces;
3180                 $fname = __METHOD__;
3181                 wfProfileIn( $fname );
3182                 wfProfileIn( __METHOD__.'-setup' );
3183
3184                 # Flags
3185                 $found = false;             # $text has been filled
3186                 $nowiki = false;            # wiki markup in $text should be escaped
3187                 $isHTML = false;            # $text is HTML, armour it against wikitext transformation
3188                 $forceRawInterwiki = false; # Force interwiki transclusion to be done in raw mode not rendered
3189                 $isDOM = false;             # $text is a DOM node needing expansion
3190
3191                 # Title object, where $text came from
3192                 $title = NULL;
3193
3194                 # $part1 is the bit before the first |, and must contain only title characters.
3195                 # Various prefixes will be stripped from it later.
3196                 $titleWithSpaces = $frame->expand( $piece['title'] );
3197                 $part1 = trim( $titleWithSpaces );
3198                 $titleText = false;
3199
3200                 # Original title text preserved for various purposes
3201                 $originalTitle = $part1;
3202
3203                 # $args is a list of argument nodes, starting from index 0, not including $part1
3204                 $args = (null == $piece['parts']) ? array() : $piece['parts'];
3205                 wfProfileOut( __METHOD__.'-setup' );
3206
3207                 # SUBST
3208                 wfProfileIn( __METHOD__.'-modifiers' );
3209                 if ( !$found ) {
3210                         $mwSubst =& MagicWord::get( 'subst' );
3211                         if ( $mwSubst->matchStartAndRemove( $part1 ) xor $this->ot['wiki'] ) {
3212                                 # One of two possibilities is true:
3213                                 # 1) Found SUBST but not in the PST phase
3214                                 # 2) Didn't find SUBST and in the PST phase
3215                                 # In either case, return without further processing
3216                                 $text = '{{' . $frame->implode( '|', $titleWithSpaces, $args ) . '}}';
3217                                 $found = true;
3218                         }
3219                 }
3220
3221                 # Variables
3222                 if ( !$found && $args->length == 0 ) {
3223                         $id = $this->mVariables->matchStartToEnd( $part1 );
3224                         if ( $id !== false ) {
3225                                 $text = $this->getVariableValue( $id );
3226                                 $this->mOutput->mContainsOldMagic = true;
3227                                 $found = true;
3228                         }
3229                 }
3230
3231                 # MSG, MSGNW and RAW
3232                 if ( !$found ) {
3233                         # Check for MSGNW:
3234                         $mwMsgnw =& MagicWord::get( 'msgnw' );
3235                         if ( $mwMsgnw->matchStartAndRemove( $part1 ) ) {
3236                                 $nowiki = true;
3237                         } else {
3238                                 # Remove obsolete MSG:
3239                                 $mwMsg =& MagicWord::get( 'msg' );
3240                                 $mwMsg->matchStartAndRemove( $part1 );
3241                         }
3242
3243                         # Check for RAW:
3244                         $mwRaw =& MagicWord::get( 'raw' );
3245                         if ( $mwRaw->matchStartAndRemove( $part1 ) ) {
3246                                 $forceRawInterwiki = true;
3247                         }
3248                 }
3249                 wfProfileOut( __METHOD__.'-modifiers' );
3250
3251                 # Save path level before recursing into functions & templates.
3252                 $lastPathLevel = $this->mTemplatePath;
3253
3254                 # Parser functions
3255                 if ( !$found ) {
3256                         wfProfileIn( __METHOD__ . '-pfunc' );
3257
3258                         $colonPos = strpos( $part1, ':' );
3259                         if ( $colonPos !== false ) {
3260                                 # Case sensitive functions
3261                                 $function = substr( $part1, 0, $colonPos );
3262                                 if ( isset( $this->mFunctionSynonyms[1][$function] ) ) {
3263                                         $function = $this->mFunctionSynonyms[1][$function];
3264                                 } else {
3265                                         # Case insensitive functions
3266                                         $function = strtolower( $function );
3267                                         if ( isset( $this->mFunctionSynonyms[0][$function] ) ) {
3268                                                 $function = $this->mFunctionSynonyms[0][$function];
3269                                         } else {
3270                                                 $function = false;
3271                                         }
3272                                 }
3273                                 if ( $function ) {
3274                                         list( $callback, $flags ) = $this->mFunctionHooks[$function];
3275                                         $initialArgs = array( &$this );
3276                                         $funcArgs = array( trim( substr( $part1, $colonPos + 1 ) ) );
3277                                         if ( $flags & SFH_OBJECT_ARGS ) {
3278                                                 # Add a frame parameter, and pass the arguments as an array
3279                                                 $allArgs = $initialArgs;
3280                                                 $allArgs[] = $frame;
3281                                                 foreach ( $args as $arg ) {
3282                                                         $funcArgs[] = $arg;
3283                                                 }
3284                                                 $allArgs[] = $funcArgs;
3285                                         } else {
3286                                                 # Convert arguments to plain text
3287                                                 foreach ( $args as $arg ) {
3288                                                         $funcArgs[] = trim( $frame->expand( $arg ) );
3289                                                 }
3290                                                 $allArgs = array_merge( $initialArgs, $funcArgs );
3291                                         }
3292
3293                                         $result = call_user_func_array( $callback, $allArgs );
3294                                         $found = true;
3295
3296                                         if ( is_array( $result ) ) {
3297                                                 if ( isset( $result[0] ) ) {
3298                                                         $text = $result[0];
3299                                                         unset( $result[0] );
3300                                                 }
3301
3302                                                 // Extract flags into the local scope
3303                                                 // This allows callers to set flags such as nowiki, found, etc.
3304                                                 extract( $result );
3305                                         } else {
3306                                                 $text = $result;
3307                                         }
3308                                 }
3309                         }
3310                         wfProfileOut( __METHOD__ . '-pfunc' );
3311                 }
3312
3313                 # Finish mangling title and then check for loops.
3314                 # Set $title to a Title object and $titleText to the PDBK
3315                 if ( !$found ) {
3316                         $ns = NS_TEMPLATE;
3317                         # Split the title into page and subpage
3318                         $subpage = '';
3319                         $part1 = $this->maybeDoSubpageLink( $part1, $subpage );
3320                         if ($subpage !== '') {
3321                                 $ns = $this->mTitle->getNamespace();
3322                         }
3323                         $title = Title::newFromText( $part1, $ns );
3324                         if ( $title ) {
3325                                 $titleText = $title->getPrefixedText();
3326                                 # Check for language variants if the template is not found
3327                                 if($wgContLang->hasVariants() && $title->getArticleID() == 0){
3328                                         $wgContLang->findVariantLink($part1, $title);
3329                                 }
3330                                 # Do infinite loop check
3331                                 if ( isset( $this->mTemplatePath[$titleText] ) ) {
3332                                         $found = true;
3333                                         $text = "[[$part1]]" . $this->insertStripItem( '<!-- WARNING: template loop detected -->' );
3334                                         wfDebug( __METHOD__.": template loop broken at '$titleText'\n" );
3335                                 }
3336                         }
3337                 }
3338
3339                 # Load from database
3340                 if ( !$found && $title ) {
3341                         wfProfileIn( __METHOD__ . '-loadtpl' );
3342                         if ( !$title->isExternal() ) {
3343                                 if ( $title->getNamespace() == NS_SPECIAL && $this->mOptions->getAllowSpecialInclusion() && $this->ot['html'] ) {
3344                                         $text = SpecialPage::capturePath( $title );
3345                                         if ( is_string( $text ) ) {
3346                                                 $found = true;
3347                                                 $isHTML = true;
3348                                                 $this->disableCache();
3349                                         }
3350                                 } else if ( $wgNonincludableNamespaces && in_array( $title->getNamespace(), $wgNonincludableNamespaces ) ) {
3351                                         $found = false; //access denied
3352                                         wfDebug( "$fname: template inclusion denied for " . $title->getPrefixedDBkey() );
3353                                 } else {
3354                                         list( $text, $title ) = $this->getTemplateDom( $title );
3355                                         if ( $text !== false ) {
3356                                                 $found = true;
3357                                                 $isDOM = true;
3358                                         }
3359                                 }
3360
3361                                 # If the title is valid but undisplayable, make a link to it
3362                                 if ( !$found && ( $this->ot['html'] || $this->ot['pre'] ) ) {
3363                                         $text = "[[:$titleText]]";
3364                                         $found = true;
3365                                 }
3366                         } elseif ( $title->isTrans() ) {
3367                                 // Interwiki transclusion
3368                                 if ( $this->ot['html'] && !$forceRawInterwiki ) {
3369                                         $text = $this->interwikiTransclude( $title, 'render' );
3370                                         $isHTML = true;
3371                                 } else {
3372                                         $text = $this->interwikiTransclude( $title, 'raw' );
3373                                         // Preprocess it like a template
3374                                         $text = $this->preprocessToDom( $text, self::PTD_FOR_INCLUSION );
3375                                         $isDOM = true;
3376                                 }
3377                                 $found = true;
3378                         }
3379                         wfProfileOut( __METHOD__ . '-loadtpl' );
3380                 }
3381
3382                 # If we haven't found text to substitute by now, we're done
3383                 # Recover the source wikitext and return it
3384                 if ( !$found ) {
3385                         $text = '{{' . $frame->implode( '|', $titleWithSpaces, $args ) . '}}';
3386                         # Prune lower levels off the recursion check path
3387                         $this->mTemplatePath = $lastPathLevel;
3388                         wfProfileOut( $fname );
3389                         return $text;
3390                 }
3391
3392                 # Expand DOM-style return values in a child frame
3393                 if ( $isDOM ) {
3394                         # Clean up argument array
3395                         $newFrame = $frame->newChild( $args, $title );
3396                         # Add a new element to the templace recursion path
3397                         $this->mTemplatePath[$titleText] = 1;
3398
3399                         if ( $titleText !== false && count( $newFrame->args ) == 0 ) {
3400                                 # Expansion is eligible for the empty-frame cache
3401                                 if ( isset( $this->mTplExpandCache[$titleText] ) ) {
3402                                         $text = $this->mTplExpandCache[$titleText];
3403                                 } else {
3404                                         $text = $newFrame->expand( $text );
3405                                         $this->mTplExpandCache[$titleText] = $text;
3406                                 }
3407                         } else {
3408                                 $text = $newFrame->expand( $text );
3409                         }
3410                 }
3411
3412                 # Replace raw HTML by a placeholder
3413                 # Add a blank line preceding, to prevent it from mucking up
3414                 # immediately preceding headings
3415                 if ( $isHTML ) {
3416                         $text = "\n\n" . $this->insertStripItem( $text );
3417                 }
3418                 # Escape nowiki-style return values
3419                 elseif ( $nowiki && ( $this->ot['html'] || $this->ot['pre'] ) ) {
3420                         $text = wfEscapeWikiText( $text );
3421                 }
3422                 # Bug 529: if the template begins with a table or block-level
3423                 # element, it should be treated as beginning a new line.
3424                 # This behaviour is somewhat controversial.
3425                 elseif ( !$piece['lineStart'] && preg_match('/^(?:{\\||:|;|#|\*)/', $text)) /*}*/{
3426                         $text = "\n" . $text;
3427                 }
3428
3429                 # Prune lower levels off the recursion check path
3430                 $this->mTemplatePath = $lastPathLevel;
3431
3432                 if ( !$this->incrementIncludeSize( 'post-expand', strlen( $text ) ) ) {
3433                         # Error, oversize inclusion
3434                         $text = "[[$originalTitle]]" .
3435                                 $this->insertStripItem( '<!-- WARNING: template omitted, post-expand include size too large -->' );
3436                 }
3437
3438                 wfProfileOut( $fname );
3439                 return $text;
3440         }
3441
3442         /**
3443          * Get the semi-parsed DOM representation of a template with a given title,
3444          * and its redirect destination title. Cached.
3445          */
3446         function getTemplateDom( $title ) {
3447                 $cacheTitle = $title;
3448                 $titleText = $title->getPrefixedDBkey();
3449
3450                 if ( isset( $this->mTplRedirCache[$titleText] ) ) {
3451                         list( $ns, $dbk ) = $this->mTplRedirCache[$titleText];
3452                         $title = Title::makeTitle( $ns, $dbk );
3453                         $titleText = $title->getPrefixedDBkey();
3454                 }
3455                 if ( isset( $this->mTplDomCache[$titleText] ) ) {
3456                         return array( $this->mTplDomCache[$titleText], $title );
3457                 }
3458
3459                 // Cache miss, go to the database
3460                 list( $text, $title ) = $this->fetchTemplateAndTitle( $title );
3461
3462                 if ( $text === false ) {
3463                         $this->mTplDomCache[$titleText] = false;
3464                         return array( false, $title );
3465                 }
3466
3467                 $dom = $this->preprocessToDom( $text, self::PTD_FOR_INCLUSION );
3468                 $this->mTplDomCache[ $titleText ] = $dom;
3469
3470                 if (! $title->equals($cacheTitle)) {
3471                         $this->mTplRedirCache[$cacheTitle->getPrefixedDBkey()] =
3472                                 array( $title->getNamespace(),$cdb = $title->getDBkey() );
3473                 }
3474
3475                 return array( $dom, $title );
3476         }
3477
3478         /**
3479          * Fetch the unparsed text of a template and register a reference to it.
3480          */
3481         function fetchTemplateAndTitle( $title ) {
3482                 $templateCb = $this->mOptions->getTemplateCallback();
3483                 $stuff = call_user_func( $templateCb, $title );
3484                 $text = $stuff['text'];
3485                 $finalTitle = isset( $stuff['finalTitle'] ) ? $stuff['finalTitle'] : $title;
3486                 if ( isset( $stuff['deps'] ) ) {
3487                         foreach ( $stuff['deps'] as $dep ) {
3488                                 $this->mOutput->addTemplate( $dep['title'], $dep['page_id'], $dep['rev_id'] );
3489                         }
3490                 }
3491                 return array($text,$finalTitle);
3492         }
3493
3494         function fetchTemplate( $title ) {
3495                 $rv = $this->fetchTemplateAndTitle($title);
3496                 return $rv[0];
3497         }
3498
3499         /**
3500          * Static function to get a template
3501          * Can be overridden via ParserOptions::setTemplateCallback().
3502          */
3503         static function statelessFetchTemplate( $title ) {
3504                 $text = $skip = false;
3505                 $finalTitle = $title;
3506                 $deps = array();
3507
3508                 // Loop to fetch the article, with up to 1 redirect
3509                 for ( $i = 0; $i < 2 && is_object( $title ); $i++ ) {
3510                         # Give extensions a chance to select the revision instead
3511                         $id = false; // Assume current
3512                         wfRunHooks( 'BeforeParserFetchTemplateAndtitle', array( false, &$title, &$skip, &$id ) );
3513
3514                         if( $skip ) {
3515                                 $text = false;
3516                                 $deps[] = array(
3517                                         'title' => $title,
3518                                         'page_id' => $title->getArticleID(),
3519                                         'rev_id' => null );
3520                                 break;
3521                         }
3522                         $rev = $id ? Revision::newFromId( $id ) : Revision::newFromTitle( $title );
3523                         $rev_id = $rev ? $rev->getId() : 0;
3524
3525                         $deps[] = array(
3526                                 'title' => $title,
3527                                 'page_id' => $title->getArticleID(),
3528                                 'rev_id' => $rev_id );
3529
3530                         if( $rev ) {
3531                                 $text = $rev->getText();
3532                         } elseif( $title->getNamespace() == NS_MEDIAWIKI ) {
3533                                 global $wgLang;
3534                                 $message = $wgLang->lcfirst( $title->getText() );
3535                                 $text = wfMsgForContentNoTrans( $message );
3536                                 if( wfEmptyMsg( $message, $text ) ) {
3537                                         $text = false;
3538                                         break;
3539                                 }
3540                         } else {
3541                                 break;
3542                         }
3543                         if ( $text === false ) {
3544                                 break;
3545                         }
3546                         // Redirect?
3547                         $finalTitle = $title;
3548                         $title = Title::newFromRedirect( $text );
3549                 }
3550                 return array(
3551                         'text' => $text,
3552                         'finalTitle' => $finalTitle,
3553                         'deps' => $deps );
3554         }
3555
3556         /**
3557          * Transclude an interwiki link.
3558          */
3559         function interwikiTransclude( $title, $action ) {
3560                 global $wgEnableScaryTranscluding;
3561
3562                 if (!$wgEnableScaryTranscluding)
3563                         return wfMsg('scarytranscludedisabled');
3564
3565                 $url = $title->getFullUrl( "action=$action" );
3566
3567                 if (strlen($url) > 255)
3568                         return wfMsg('scarytranscludetoolong');
3569                 return $this->fetchScaryTemplateMaybeFromCache($url);
3570         }
3571
3572         function fetchScaryTemplateMaybeFromCache($url) {
3573                 global $wgTranscludeCacheExpiry;
3574                 $dbr = wfGetDB(DB_SLAVE);
3575                 $obj = $dbr->selectRow('transcache', array('tc_time', 'tc_contents'),
3576                                 array('tc_url' => $url));
3577                 if ($obj) {
3578                         $time = $obj->tc_time;
3579                         $text = $obj->tc_contents;
3580                         if ($time && time() < $time + $wgTranscludeCacheExpiry ) {
3581                                 return $text;
3582                         }
3583                 }
3584
3585                 $text = Http::get($url);
3586                 if (!$text)
3587                         return wfMsg('scarytranscludefailed', $url);
3588
3589                 $dbw = wfGetDB(DB_MASTER);
3590                 $dbw->replace('transcache', array('tc_url'), array(
3591                         'tc_url' => $url,
3592                         'tc_time' => time(),
3593                         'tc_contents' => $text));
3594                 return $text;
3595         }
3596
3597
3598         /**
3599          * Triple brace replacement -- used for template arguments
3600          * @private
3601          */
3602         function argSubstitution( $piece, $frame ) {
3603                 wfProfileIn( __METHOD__ );
3604
3605                 $text = false;
3606                 $error = false;
3607                 $parts = $piece['parts'];
3608                 $argWithSpaces = $frame->expand( $piece['title'] );
3609                 $arg = trim( $argWithSpaces );
3610
3611                 if ( isset( $frame->args[$arg] ) ) {
3612                         $text = $frame->parent->expand( $frame->args[$arg] );
3613                 } else if ( ( $this->ot['html'] || $this->ot['pre'] ) && $parts->length > 0 ) {
3614                         $text = $frame->expand( $parts->item( 0 ) );
3615                 }
3616                 if ( !$this->incrementIncludeSize( 'arg', strlen( $text ) ) ) {
3617                         $error = '<!-- WARNING: argument omitted, expansion size too large -->';
3618                 }
3619
3620                 if ( $text === false ) {
3621                         $text = '{{{' . $frame->implode( '|', $argWithSpaces, $parts ) . '}}}';
3622                 }
3623                 if ( $error !== false ) {
3624                         $text .= $error;
3625                 }
3626
3627                 wfProfileOut( __METHOD__ );
3628                 return $text;
3629         }
3630
3631         /**
3632          * Return the text to be used for a given extension tag.
3633          * This is the ghost of strip().
3634          *
3635          * @param array $params Associative array of parameters:
3636          *     name       DOMNode for the tag name
3637          *     attrText   DOMNode for unparsed text where tag attributes are thought to be
3638          *     inner      Contents of extension element
3639          *     noClose    Original text did not have a close tag
3640          * @param PPFrame $frame
3641          */
3642         function extensionSubstitution( $params, $frame ) {
3643                 global $wgRawHtml, $wgContLang;
3644                 static $n = 1;
3645
3646                 $name = $frame->expand( $params['name'] );
3647                 $attrText = is_null( $params['attr'] ) ? null : $frame->expand( $params['attr'] );
3648                 $content = is_null( $params['inner'] ) ? null : $frame->expand( $params['inner'] );
3649
3650                 $marker = "{$this->mUniqPrefix}-$name-" . sprintf('%08X', $n++) . $this->mMarkerSuffix;
3651
3652                 if ( $this->ot['html'] ) {
3653                         $name = strtolower( $name );
3654
3655                         $params = Sanitizer::decodeTagAttributes( $attrText );
3656                         switch ( $name ) {
3657                                 case 'html':
3658                                         if( $wgRawHtml ) {
3659                                                 $output = $content;
3660                                                 break;
3661                                         } else {
3662                                                 throw new MWException( '<html> extension tag encountered unexpectedly' );
3663                                         }
3664                                 case 'nowiki':
3665                                         $output = Xml::escapeTagsOnly( $content );
3666                                         break;
3667                                 case 'math':
3668                                         $output = $wgContLang->armourMath(
3669                                                 MathRenderer::renderMath( $content, $params ) );
3670                                         break;
3671                                 case 'gallery':
3672                                         $output = $this->renderImageGallery( $content, $params );
3673                                         break;
3674                                 default:
3675                                         if( isset( $this->mTagHooks[$name] ) ) {
3676                                                 $output = call_user_func_array( $this->mTagHooks[$name],
3677                                                         array( $content, $params, $this ) );
3678                                         } else {
3679                                                 throw new MWException( "Invalid call hook $name" );
3680                                         }
3681                         }
3682                 } else {
3683                         if ( $content === null ) {
3684                                 $output = "<$name$attrText/>";
3685                         } else {
3686                                 $close = is_null( $params['close'] ) ? '' : $frame->expand( $params['close'] );
3687                                 $output = "<$name$attrText>$content$close";
3688                         }
3689                 }
3690
3691                 if ( $name == 'html' || $name == 'nowiki' ) {
3692                         $this->mStripState->nowiki->setPair( $marker, $output );
3693                 } else {
3694                         $this->mStripState->general->setPair( $marker, $output );
3695                 }
3696                 return $marker;
3697         }
3698
3699         /**
3700          * Increment an include size counter
3701          *
3702          * @param string $type The type of expansion
3703          * @param integer $size The size of the text
3704          * @return boolean False if this inclusion would take it over the maximum, true otherwise
3705          */
3706         function incrementIncludeSize( $type, $size ) {
3707                 if ( $this->mIncludeSizes[$type] + $size > $this->mOptions->getMaxIncludeSize( $type ) ) {
3708                         return false;
3709                 } else {
3710                         $this->mIncludeSizes[$type] += $size;
3711                         return true;
3712                 }
3713         }
3714
3715         /**
3716          * Detect __NOGALLERY__ magic word and set a placeholder
3717          */
3718         function stripNoGallery( &$text ) {
3719                 # if the string __NOGALLERY__ (not case-sensitive) occurs in the HTML,
3720                 # do not add TOC
3721                 $mw = MagicWord::get( 'nogallery' );
3722                 $this->mOutput->mNoGallery = $mw->matchAndRemove( $text ) ;
3723         }
3724
3725         /**
3726          * Find the first __TOC__ magic word and set a <!--MWTOC-->
3727          * placeholder that will then be replaced by the real TOC in
3728          * ->formatHeadings, this works because at this points real
3729          * comments will have already been discarded by the sanitizer.
3730          *
3731          * Any additional __TOC__ magic words left over will be discarded
3732          * as there can only be one TOC on the page.
3733          */
3734         function stripToc( $text ) {
3735                 # if the string __NOTOC__ (not case-sensitive) occurs in the HTML,
3736                 # do not add TOC
3737                 $mw = MagicWord::get( 'notoc' );
3738                 if( $mw->matchAndRemove( $text ) ) {
3739                         $this->mShowToc = false;
3740                 }
3741
3742                 $mw = MagicWord::get( 'toc' );
3743                 if( $mw->match( $text ) ) {
3744                         $this->mShowToc = true;
3745                         $this->mForceTocPosition = true;
3746
3747                         // Set a placeholder. At the end we'll fill it in with the TOC.
3748                         $text = $mw->replace( '<!--MWTOC-->', $text, 1 );
3749
3750                         // Only keep the first one.
3751                         $text = $mw->replace( '', $text );
3752                 }
3753                 return $text;
3754         }
3755
3756         /**
3757          * This function accomplishes several tasks:
3758          * 1) Auto-number headings if that option is enabled
3759          * 2) Add an [edit] link to sections for users who have enabled the option and can edit the page
3760          * 3) Add a Table of contents on the top for users who have enabled the option
3761          * 4) Auto-anchor headings
3762          *
3763          * It loops through all headlines, collects the necessary data, then splits up the
3764          * string and re-inserts the newly formatted headlines.
3765          *
3766          * @param string $text
3767          * @param boolean $isMain
3768          * @private
3769          */
3770         function formatHeadings( $text, $isMain=true ) {
3771                 global $wgMaxTocLevel, $wgContLang;
3772
3773                 $doNumberHeadings = $this->mOptions->getNumberHeadings();
3774                 if( !$this->mTitle->quickUserCan( 'edit' ) ) {
3775                         $showEditLink = 0;
3776                 } else {
3777                         $showEditLink = $this->mOptions->getEditSection();
3778                 }
3779
3780                 # Inhibit editsection links if requested in the page
3781                 $esw =& MagicWord::get( 'noeditsection' );
3782                 if( $esw->matchAndRemove( $text ) ) {
3783                         $showEditLink = 0;
3784                 }
3785
3786                 # Get all headlines for numbering them and adding funky stuff like [edit]
3787                 # links - this is for later, but we need the number of headlines right now
3788                 $matches = array();
3789                 $numMatches = preg_match_all( '/<H(?P<level>[1-6])(?P<attrib>.*?'.'>)(?P<header>.*?)<\/H[1-6] *>/i', $text, $matches );
3790
3791                 # if there are fewer than 4 headlines in the article, do not show TOC
3792                 # unless it's been explicitly enabled.
3793                 $enoughToc = $this->mShowToc &&
3794                         (($numMatches >= 4) || $this->mForceTocPosition);
3795
3796                 # Allow user to stipulate that a page should have a "new section"
3797                 # link added via __NEWSECTIONLINK__
3798                 $mw =& MagicWord::get( 'newsectionlink' );
3799                 if( $mw->matchAndRemove( $text ) )
3800                         $this->mOutput->setNewSection( true );
3801
3802                 # if the string __FORCETOC__ (not case-sensitive) occurs in the HTML,
3803                 # override above conditions and always show TOC above first header
3804                 $mw =& MagicWord::get( 'forcetoc' );
3805                 if ($mw->matchAndRemove( $text ) ) {
3806                         $this->mShowToc = true;
3807                         $enoughToc = true;
3808                 }
3809
3810                 # We need this to perform operations on the HTML
3811                 $sk = $this->mOptions->getSkin();
3812
3813                 # headline counter
3814                 $headlineCount = 0;
3815                 $numVisible = 0;
3816
3817                 # Ugh .. the TOC should have neat indentation levels which can be
3818                 # passed to the skin functions. These are determined here
3819                 $toc = '';
3820                 $full = '';
3821                 $head = array();
3822                 $sublevelCount = array();
3823                 $levelCount = array();
3824                 $toclevel = 0;
3825                 $level = 0;
3826                 $prevlevel = 0;
3827                 $toclevel = 0;
3828                 $prevtoclevel = 0;
3829                 $markerRegex = "{$this->mUniqPrefix}-h-(\d+)-{$this->mMarkerSuffix}";
3830                 $baseTitleText = $this->mTitle->getPrefixedDBkey();
3831                 $tocraw = array();
3832
3833                 foreach( $matches[3] as $headline ) {
3834                         $isTemplate = false;
3835                         $titleText = false;
3836                         $sectionIndex = false;
3837                         $numbering = '';
3838                         $markerMatches = array();
3839                         if (preg_match("/^$markerRegex/", $headline, $markerMatches)) {
3840                                 $serial = $markerMatches[1];
3841                                 list( $titleText, $sectionIndex ) = $this->mHeadings[$serial];
3842                                 $isTemplate = ($titleText != $baseTitleText);
3843                                 $headline = preg_replace("/^$markerRegex/", "", $headline);
3844                         }
3845
3846                         if( $toclevel ) {
3847                                 $prevlevel = $level;
3848                                 $prevtoclevel = $toclevel;
3849                         }
3850                         $level = $matches[1][$headlineCount];
3851
3852                         if( $doNumberHeadings || $enoughToc ) {
3853
3854                                 if ( $level > $prevlevel ) {
3855                                         # Increase TOC level
3856                                         $toclevel++;
3857                                         $sublevelCount[$toclevel] = 0;
3858                                         if( $toclevel<$wgMaxTocLevel ) {
3859                                                 $prevtoclevel = $toclevel;
3860                                                 $toc .= $sk->tocIndent();
3861                                                 $numVisible++;
3862                                         }
3863                                 }
3864                                 elseif ( $level < $prevlevel && $toclevel > 1 ) {
3865                                         # Decrease TOC level, find level to jump to
3866
3867                                         if ( $toclevel == 2 && $level <= $levelCount[1] ) {
3868                                                 # Can only go down to level 1
3869                                                 $toclevel = 1;
3870                                         } else {
3871                                                 for ($i = $toclevel; $i > 0; $i--) {
3872                                                         if ( $levelCount[$i] == $level ) {
3873                                                                 # Found last matching level
3874                                                                 $toclevel = $i;
3875                                                                 break;
3876                                                         }
3877                                                         elseif ( $levelCount[$i] < $level ) {
3878                                                                 # Found first matching level below current level
3879                                                                 $toclevel = $i + 1;
3880                                                                 break;
3881                                                         }
3882                                                 }
3883                                         }
3884                                         if( $toclevel<$wgMaxTocLevel ) {
3885                                                 if($prevtoclevel < $wgMaxTocLevel) {
3886                                                         # Unindent only if the previous toc level was shown :p
3887                                                         $toc .= $sk->tocUnindent( $prevtoclevel - $toclevel );
3888                                                 } else {
3889                                                         $toc .= $sk->tocLineEnd();
3890                                                 }
3891                                         }
3892                                 }
3893                                 else {
3894                                         # No change in level, end TOC line
3895                                         if( $toclevel<$wgMaxTocLevel ) {
3896                                                 $toc .= $sk->tocLineEnd();
3897                                         }
3898                                 }
3899
3900                                 $levelCount[$toclevel] = $level;
3901
3902                                 # count number of headlines for each level
3903                                 @$sublevelCount[$toclevel]++;
3904                                 $dot = 0;
3905                                 for( $i = 1; $i <= $toclevel; $i++ ) {
3906                                         if( !empty( $sublevelCount[$i] ) ) {
3907                                                 if( $dot ) {
3908                                                         $numbering .= '.';
3909                                                 }
3910                                                 $numbering .= $wgContLang->formatNum( $sublevelCount[$i] );
3911                                                 $dot = 1;
3912                                         }
3913                                 }
3914                         }
3915
3916                         # The safe header is a version of the header text safe to use for links
3917                         # Avoid insertion of weird stuff like <math> by expanding the relevant sections
3918                         $safeHeadline = $this->mStripState->unstripBoth( $headline );
3919
3920                         # Remove link placeholders by the link text.
3921                         #     <!--LINK number-->
3922                         # turns into
3923                         #     link text with suffix
3924                         $safeHeadline = preg_replace( '/<!--LINK ([0-9]*)-->/e',
3925                                                             "\$this->mLinkHolders['texts'][\$1]",
3926                                                             $safeHeadline );
3927                         $safeHeadline = preg_replace( '/<!--IWLINK ([0-9]*)-->/e',
3928                                                             "\$this->mInterwikiLinkHolders['texts'][\$1]",
3929                                                             $safeHeadline );
3930
3931                         # Strip out HTML (other than plain <sup> and <sub>: bug 8393)
3932                         $tocline = preg_replace(
3933                                 array( '#<(?!/?(sup|sub)).*?'.'>#', '#<(/?(sup|sub)).*?'.'>#' ),
3934                                 array( '',                          '<$1>'),
3935                                 $safeHeadline
3936                         );
3937                         $tocline = trim( $tocline );
3938
3939                         # For the anchor, strip out HTML-y stuff period
3940                         $safeHeadline = preg_replace( '/<.*?'.'>/', '', $safeHeadline );
3941                         $safeHeadline = trim( $safeHeadline );
3942
3943                         # Save headline for section edit hint before it's escaped
3944                         $headlineHint = $safeHeadline;
3945                         $safeHeadline = Sanitizer::escapeId( $safeHeadline );
3946                         $refers[$headlineCount] = $safeHeadline;
3947
3948                         # count how many in assoc. array so we can track dupes in anchors
3949                         isset( $refers[$safeHeadline] ) ? $refers[$safeHeadline]++ : $refers[$safeHeadline] = 1;
3950                         $refcount[$headlineCount] = $refers[$safeHeadline];
3951
3952                         # Don't number the heading if it is the only one (looks silly)
3953                         if( $doNumberHeadings && count( $matches[3] ) > 1) {
3954                                 # the two are different if the line contains a link
3955                                 $headline=$numbering . ' ' . $headline;
3956                         }
3957
3958                         # Create the anchor for linking from the TOC to the section
3959                         $anchor = $safeHeadline;
3960                         if($refcount[$headlineCount] > 1 ) {
3961                                 $anchor .= '_' . $refcount[$headlineCount];
3962                         }
3963                         if( $enoughToc && ( !isset($wgMaxTocLevel) || $toclevel<$wgMaxTocLevel ) ) {
3964                                 $toc .= $sk->tocLine($anchor, $tocline, $numbering, $toclevel);
3965                                 $tocraw[] = array( 'toclevel' => $toclevel, 'level' => $level, 'line' => $tocline, 'number' => $numbering );
3966                         }
3967                         # give headline the correct <h#> tag
3968                         if( $showEditLink && $sectionIndex !== false ) {
3969                                 if( $isTemplate ) {
3970                                         # Put a T flag in the section identifier, to indicate to extractSections()
3971                                         # that sections inside <includeonly> should be counted.
3972                                         $editlink = $sk->editSectionLinkForOther($titleText, "T-$sectionIndex");
3973                                 } else {
3974                                         $editlink = $sk->editSectionLink($this->mTitle, $sectionIndex, $headlineHint);
3975                                 }
3976                         } else {
3977                                 $editlink = '';
3978                         }
3979                         $head[$headlineCount] = $sk->makeHeadline( $level, $matches['attrib'][$headlineCount], $anchor, $headline, $editlink );
3980
3981                         $headlineCount++;
3982                 }
3983
3984                 $this->mOutput->setSections( $tocraw );
3985
3986                 # Never ever show TOC if no headers
3987                 if( $numVisible < 1 ) {
3988                         $enoughToc = false;
3989                 }
3990
3991                 if( $enoughToc ) {
3992                         if( $prevtoclevel > 0 && $prevtoclevel < $wgMaxTocLevel ) {
3993                                 $toc .= $sk->tocUnindent( $prevtoclevel - 1 );
3994                         }
3995                         $toc = $sk->tocList( $toc );
3996                 }
3997
3998                 # split up and insert constructed headlines
3999
4000                 $blocks = preg_split( '/<H[1-6].*?' . '>.*?<\/H[1-6]>/i', $text );
4001                 $i = 0;
4002
4003                 foreach( $blocks as $block ) {
4004                         if( $showEditLink && $headlineCount > 0 && $i == 0 && $block != "\n" ) {
4005                                 # This is the [edit] link that appears for the top block of text when
4006                                 # section editing is enabled
4007
4008                                 # Disabled because it broke block formatting
4009                                 # For example, a bullet point in the top line
4010                                 # $full .= $sk->editSectionLink(0);
4011                         }
4012                         $full .= $block;
4013                         if( $enoughToc && !$i && $isMain && !$this->mForceTocPosition ) {
4014                                 # Top anchor now in skin
4015                                 $full = $full.$toc;
4016                         }
4017
4018                         if( !empty( $head[$i] ) ) {
4019                                 $full .= $head[$i];
4020                         }
4021                         $i++;
4022                 }
4023                 if( $this->mForceTocPosition ) {
4024                         return str_replace( '<!--MWTOC-->', $toc, $full );
4025                 } else {
4026                         return $full;
4027                 }
4028         }
4029
4030         /**
4031          * Transform wiki markup when saving a page by doing \r\n -> \n
4032          * conversion, substitting signatures, {{subst:}} templates, etc.
4033          *
4034          * @param string $text the text to transform
4035          * @param Title &$title the Title object for the current article
4036          * @param User &$user the User object describing the current user
4037          * @param ParserOptions $options parsing options
4038          * @param bool $clearState whether to clear the parser state first
4039          * @return string the altered wiki markup
4040          * @public
4041          */
4042         function preSaveTransform( $text, &$title, $user, $options, $clearState = true ) {
4043                 $this->mOptions = $options;
4044                 $this->mTitle =& $title;
4045                 $this->setOutputType( OT_WIKI );
4046
4047                 if ( $clearState ) {
4048                         $this->clearState();
4049                 }
4050
4051                 $pairs = array(
4052                         "\r\n" => "\n",
4053                 );
4054                 $text = str_replace( array_keys( $pairs ), array_values( $pairs ), $text );
4055                 $text = $this->pstPass2( $text, $user );
4056                 $text = $this->mStripState->unstripBoth( $text );
4057                 return $text;
4058         }
4059
4060         /**
4061          * Pre-save transform helper function
4062          * @private
4063          */
4064         function pstPass2( $text, $user ) {
4065                 global $wgContLang, $wgLocaltimezone;
4066
4067                 /* Note: This is the timestamp saved as hardcoded wikitext to
4068                  * the database, we use $wgContLang here in order to give
4069                  * everyone the same signature and use the default one rather
4070                  * than the one selected in each user's preferences.
4071                  */
4072                 if ( isset( $wgLocaltimezone ) ) {
4073                         $oldtz = getenv( 'TZ' );
4074                         putenv( 'TZ='.$wgLocaltimezone );
4075                 }
4076                 $d = $wgContLang->timeanddate( date( 'YmdHis' ), false, false) .
4077                   ' (' . date( 'T' ) . ')';
4078                 if ( isset( $wgLocaltimezone ) ) {
4079                         putenv( 'TZ='.$oldtz );
4080                 }
4081
4082                 # Variable replacement
4083                 # Because mOutputType is OT_WIKI, this will only process {{subst:xxx}} type tags
4084                 $text = $this->replaceVariables( $text );
4085
4086                 # Strip out <nowiki> etc. added via replaceVariables
4087                 #$text = $this->strip( $text, $this->mStripState, false, array( 'gallery' ) );
4088
4089                 # Signatures
4090                 $sigText = $this->getUserSig( $user );
4091                 $text = strtr( $text, array(
4092                         '~~~~~' => $d,
4093                         '~~~~' => "$sigText $d",
4094                         '~~~' => $sigText
4095                 ) );
4096
4097                 # Context links: [[|name]] and [[name (context)|]]
4098                 #
4099                 global $wgLegalTitleChars;
4100                 $tc = "[$wgLegalTitleChars]";
4101                 $nc = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
4102
4103                 $p1 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\))\\|]]/";            # [[ns:page (context)|]]
4104                 $p3 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\)|)(, $tc+|)\\|]]/";  # [[ns:page (context), context|]]
4105                 $p2 = "/\[\[\\|($tc+)]]/";                                      # [[|page]]
4106
4107                 # try $p1 first, to turn "[[A, B (C)|]]" into "[[A, B (C)|A, B]]"
4108                 $text = preg_replace( $p1, '[[\\1\\2\\3|\\2]]', $text );
4109                 $text = preg_replace( $p3, '[[\\1\\2\\3\\4|\\2]]', $text );
4110
4111                 $t = $this->mTitle->getText();
4112                 $m = array();
4113                 if ( preg_match( "/^($nc+:|)$tc+?( \\($tc+\\))$/", $t, $m ) ) {
4114                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
4115                 } elseif ( preg_match( "/^($nc+:|)$tc+?(, $tc+|)$/", $t, $m ) && '' != "$m[1]$m[2]" ) {
4116                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
4117                 } else {
4118                         # if there's no context, don't bother duplicating the title
4119                         $text = preg_replace( $p2, '[[\\1]]', $text );
4120                 }
4121
4122                 # Trim trailing whitespace
4123                 $text = rtrim( $text );
4124
4125                 return $text;
4126         }
4127
4128         /**
4129          * Fetch the user's signature text, if any, and normalize to
4130          * validated, ready-to-insert wikitext.
4131          *
4132          * @param User $user
4133          * @return string
4134          * @private
4135          */
4136         function getUserSig( &$user ) {
4137                 global $wgMaxSigChars;
4138
4139                 $username = $user->getName();
4140                 $nickname = $user->getOption( 'nickname' );
4141                 $nickname = $nickname === '' ? $username : $nickname;
4142
4143                 if( mb_strlen( $nickname ) > $wgMaxSigChars ) {
4144                         $nickname = $username;
4145                         wfDebug( __METHOD__ . ": $username has overlong signature.\n" );
4146                 } elseif( $user->getBoolOption( 'fancysig' ) !== false ) {
4147                         # Sig. might contain markup; validate this
4148                         if( $this->validateSig( $nickname ) !== false ) {
4149                                 # Validated; clean up (if needed) and return it
4150                                 return $this->cleanSig( $nickname, true );
4151                         } else {
4152                                 # Failed to validate; fall back to the default
4153                                 $nickname = $username;
4154                                 wfDebug( "Parser::getUserSig: $username has bad XML tags in signature.\n" );
4155                         }
4156                 }
4157
4158                 // Make sure nickname doesnt get a sig in a sig
4159                 $nickname = $this->cleanSigInSig( $nickname );
4160
4161                 # If we're still here, make it a link to the user page
4162                 $userText = wfEscapeWikiText( $username );
4163                 $nickText = wfEscapeWikiText( $nickname );
4164                 if ( $user->isAnon() )  {
4165                         return wfMsgExt( 'signature-anon', array( 'content', 'parsemag' ), $userText, $nickText );
4166                 } else {
4167                         return wfMsgExt( 'signature', array( 'content', 'parsemag' ), $userText, $nickText );
4168                 }
4169         }
4170
4171         /**
4172          * Check that the user's signature contains no bad XML
4173          *
4174          * @param string $text
4175          * @return mixed An expanded string, or false if invalid.
4176          */
4177         function validateSig( $text ) {
4178                 return( wfIsWellFormedXmlFragment( $text ) ? $text : false );
4179         }
4180
4181         /**
4182          * Clean up signature text
4183          *
4184          * 1) Strip ~~~, ~~~~ and ~~~~~ out of signatures @see cleanSigInSig
4185          * 2) Substitute all transclusions
4186          *
4187          * @param string $text
4188          * @param $parsing Whether we're cleaning (preferences save) or parsing
4189          * @return string Signature text
4190          */
4191         function cleanSig( $text, $parsing = false ) {
4192                 if ( !$parsing ) {
4193                         global $wgTitle;
4194                         $this->startExternalParse( $wgTitle, new ParserOptions(), OT_MSG );
4195                 }
4196
4197                 # FIXME: regex doesn't respect extension tags or nowiki
4198                 #  => Move this logic to braceSubstitution()
4199                 $substWord = MagicWord::get( 'subst' );
4200                 $substRegex = '/\{\{(?!(?:' . $substWord->getBaseRegex() . '))/x' . $substWord->getRegexCase();
4201                 $substText = '{{' . $substWord->getSynonym( 0 );
4202
4203                 $text = preg_replace( $substRegex, $substText, $text );
4204                 $text = $this->cleanSigInSig( $text );
4205                 $dom = $this->preprocessToDom( $text );
4206                 $frame = new PPFrame( $this );
4207                 $text = $frame->expand( $dom->documentElement );
4208
4209                 if ( !$parsing ) {
4210                         $text = $this->mStripState->unstripBoth( $text );
4211                 }
4212
4213                 return $text;
4214         }
4215
4216         /**
4217          * Strip ~~~, ~~~~ and ~~~~~ out of signatures
4218          * @param string $text
4219          * @return string Signature text with /~{3,5}/ removed
4220          */
4221         function cleanSigInSig( $text ) {
4222                 $text = preg_replace( '/~{3,5}/', '', $text );
4223                 return $text;
4224         }
4225
4226         /**
4227          * Set up some variables which are usually set up in parse()
4228          * so that an external function can call some class members with confidence
4229          * @public
4230          */
4231         function startExternalParse( &$title, $options, $outputType, $clearState = true ) {
4232                 $this->mTitle =& $title;
4233                 $this->mOptions = $options;
4234                 $this->setOutputType( $outputType );
4235                 if ( $clearState ) {
4236                         $this->clearState();
4237                 }
4238         }
4239
4240         /**
4241          * Transform a MediaWiki message by replacing magic variables.
4242          *
4243          * For some unknown reason, it also expands templates, but only to the
4244          * first recursion level. This is wrong and broken, probably introduced
4245          * accidentally during refactoring, but probably relied upon by thousands
4246          * of users.
4247          *
4248          * @param string $text the text to transform
4249          * @param ParserOptions $options  options
4250          * @return string the text with variables substituted
4251          * @public
4252          */
4253         function transformMsg( $text, $options ) {
4254                 global $wgTitle;
4255                 static $executing = false;
4256
4257                 $fname = "Parser::transformMsg";
4258
4259                 # Guard against infinite recursion
4260                 if ( $executing ) {
4261                         return $text;
4262                 }
4263                 $executing = true;
4264
4265                 wfProfileIn($fname);
4266
4267                 if ( $wgTitle && !( $wgTitle instanceof FakeTitle ) ) {
4268                         $this->mTitle = $wgTitle;
4269                 } else {
4270                         $this->mTitle = Title::newFromText('msg');
4271                 }
4272                 $this->mOptions = $options;
4273                 $this->setOutputType( OT_MSG );
4274                 $this->clearState();
4275                 $text = $this->replaceVariables( $text );
4276                 $text = $this->mStripState->unstripBoth( $text );
4277
4278                 $executing = false;
4279                 wfProfileOut($fname);
4280                 return $text;
4281         }
4282
4283         /**
4284          * Create an HTML-style tag, e.g. <yourtag>special text</yourtag>
4285          * The callback should have the following form:
4286          *    function myParserHook( $text, $params, &$parser ) { ... }
4287          *
4288          * Transform and return $text. Use $parser for any required context, e.g. use
4289          * $parser->getTitle() and $parser->getOptions() not $wgTitle or $wgOut->mParserOptions
4290          *
4291          * @public
4292          *
4293          * @param mixed $tag The tag to use, e.g. 'hook' for <hook>
4294          * @param mixed $callback The callback function (and object) to use for the tag
4295          *
4296          * @return The old value of the mTagHooks array associated with the hook
4297          */
4298         function setHook( $tag, $callback ) {
4299                 $tag = strtolower( $tag );
4300                 $oldVal = isset( $this->mTagHooks[$tag] ) ? $this->mTagHooks[$tag] : null;
4301                 $this->mTagHooks[$tag] = $callback;
4302                 $this->mStripList[] = $tag;
4303
4304                 return $oldVal;
4305         }
4306
4307         function setTransparentTagHook( $tag, $callback ) {
4308                 $tag = strtolower( $tag );
4309                 $oldVal = isset( $this->mTransparentTagHooks[$tag] ) ? $this->mTransparentTagHooks[$tag] : null;
4310                 $this->mTransparentTagHooks[$tag] = $callback;
4311
4312                 return $oldVal;
4313         }
4314
4315         /**
4316          * Create a function, e.g. {{sum:1|2|3}}
4317          * The callback function should have the form:
4318          *    function myParserFunction( &$parser, $arg1, $arg2, $arg3 ) { ... }
4319          *
4320          * The callback may either return the text result of the function, or an array with the text
4321          * in element 0, and a number of flags in the other elements. The names of the flags are
4322          * specified in the keys. Valid flags are:
4323          *   found                     The text returned is valid, stop processing the template. This
4324          *                             is on by default.
4325          *   nowiki                    Wiki markup in the return value should be escaped
4326          *   noparse                   Unsafe HTML tags should not be stripped, etc.
4327          *   noargs                    Don't replace triple-brace arguments in the return value
4328          *   isHTML                    The returned text is HTML, armour it against wikitext transformation
4329          *
4330          * @public
4331          *
4332          * @param string $id The magic word ID
4333          * @param mixed $callback The callback function (and object) to use
4334          * @param integer $flags a combination of the following flags:
4335          *                SFH_NO_HASH No leading hash, i.e. {{plural:...}} instead of {{#if:...}}
4336          *
4337          * @return The old callback function for this name, if any
4338          */
4339         function setFunctionHook( $id, $callback, $flags = 0 ) {
4340                 $oldVal = isset( $this->mFunctionHooks[$id] ) ? $this->mFunctionHooks[$id][0] : null;
4341                 $this->mFunctionHooks[$id] = array( $callback, $flags );
4342
4343                 # Add to function cache
4344                 $mw = MagicWord::get( $id );
4345                 if( !$mw )
4346                         throw new MWException( 'Parser::setFunctionHook() expecting a magic word identifier.' );
4347
4348                 $synonyms = $mw->getSynonyms();
4349                 $sensitive = intval( $mw->isCaseSensitive() );
4350
4351                 foreach ( $synonyms as $syn ) {
4352                         # Case
4353                         if ( !$sensitive ) {
4354                                 $syn = strtolower( $syn );
4355                         }
4356                         # Add leading hash
4357                         if ( !( $flags & SFH_NO_HASH ) ) {
4358                                 $syn = '#' . $syn;
4359                         }
4360                         # Remove trailing colon
4361                         if ( substr( $syn, -1, 1 ) == ':' ) {
4362                                 $syn = substr( $syn, 0, -1 );
4363                         }
4364                         $this->mFunctionSynonyms[$sensitive][$syn] = $id;
4365                 }
4366                 return $oldVal;
4367         }
4368
4369         /**
4370          * Get all registered function hook identifiers
4371          *
4372          * @return array
4373          */
4374         function getFunctionHooks() {
4375                 return array_keys( $this->mFunctionHooks );
4376         }
4377
4378         /**
4379          * Replace <!--LINK--> link placeholders with actual links, in the buffer
4380          * Placeholders created in Skin::makeLinkObj()
4381          * Returns an array of link CSS classes, indexed by PDBK.
4382          * $options is a bit field, RLH_FOR_UPDATE to select for update
4383          */
4384         function replaceLinkHolders( &$text, $options = 0 ) {
4385                 global $wgUser;
4386                 global $wgContLang;
4387
4388                 $fname = 'Parser::replaceLinkHolders';
4389                 wfProfileIn( $fname );
4390
4391                 $pdbks = array();
4392                 $colours = array();
4393                 $linkcolour_ids = array();
4394                 $sk = $this->mOptions->getSkin();
4395                 $linkCache =& LinkCache::singleton();
4396
4397                 if ( !empty( $this->mLinkHolders['namespaces'] ) ) {
4398                         wfProfileIn( $fname.'-check' );
4399                         $dbr = wfGetDB( DB_SLAVE );
4400                         $page = $dbr->tableName( 'page' );
4401                         $threshold = $wgUser->getOption('stubthreshold');
4402
4403                         # Sort by namespace
4404                         asort( $this->mLinkHolders['namespaces'] );
4405
4406                         # Generate query
4407                         $query = false;
4408                         $current = null;
4409                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
4410                                 # Make title object
4411                                 $title = $this->mLinkHolders['titles'][$key];
4412
4413                                 # Skip invalid entries.
4414                                 # Result will be ugly, but prevents crash.
4415                                 if ( is_null( $title ) ) {
4416                                         continue;
4417                                 }
4418                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
4419
4420                                 # Check if it's a static known link, e.g. interwiki
4421                                 if ( $title->isAlwaysKnown() ) {
4422                                         $colours[$pdbk] = '';
4423                                 } elseif ( ( $id = $linkCache->getGoodLinkID( $pdbk ) ) != 0 ) {
4424                                         $colours[$pdbk] = '';
4425                                         $this->mOutput->addLink( $title, $id );
4426                                 } elseif ( $linkCache->isBadLink( $pdbk ) ) {
4427                                         $colours[$pdbk] = 'new';
4428                                 } elseif ( $title->getNamespace() == NS_SPECIAL && !SpecialPage::exists( $pdbk ) ) {
4429                                         $colours[$pdbk] = 'new';
4430                                 } else {
4431                                         # Not in the link cache, add it to the query
4432                                         if ( !isset( $current ) ) {
4433                                                 $current = $ns;
4434                                                 $query =  "SELECT page_id, page_namespace, page_title";
4435                                                 if ( $threshold > 0 ) {
4436                                                         $query .= ', page_len, page_is_redirect';
4437                                                 }
4438                                                 $query .= " FROM $page WHERE (page_namespace=$ns AND page_title IN(";
4439                                         } elseif ( $current != $ns ) {
4440                                                 $current = $ns;
4441                                                 $query .= ")) OR (page_namespace=$ns AND page_title IN(";
4442                                         } else {
4443                                                 $query .= ', ';
4444                                         }
4445
4446                                         $query .= $dbr->addQuotes( $this->mLinkHolders['dbkeys'][$key] );
4447                                 }
4448                         }
4449                         if ( $query ) {
4450                                 $query .= '))';
4451                                 if ( $options & RLH_FOR_UPDATE ) {
4452                                         $query .= ' FOR UPDATE';
4453                                 }
4454
4455                                 $res = $dbr->query( $query, $fname );
4456
4457                                 # Fetch data and form into an associative array
4458                                 # non-existent = broken
4459                                 while ( $s = $dbr->fetchObject($res) ) {
4460                                         $title = Title::makeTitle( $s->page_namespace, $s->page_title );
4461                                         $pdbk = $title->getPrefixedDBkey();
4462                                         $linkCache->addGoodLinkObj( $s->page_id, $title );
4463                                         $this->mOutput->addLink( $title, $s->page_id );
4464                                         $colours[$pdbk] = $sk->getLinkColour( $s, $threshold );
4465                                         //add id to the extension todolist
4466                                         $linkcolour_ids[$s->page_id] = $pdbk;
4467                                 }
4468                                 //pass an array of page_ids to an extension
4469                                 wfRunHooks( 'GetLinkColours', array( $linkcolour_ids, &$colours ) );
4470                         }
4471                         wfProfileOut( $fname.'-check' );
4472
4473                         # Do a second query for different language variants of links and categories
4474                         if($wgContLang->hasVariants()){
4475                                 $linkBatch = new LinkBatch();
4476                                 $variantMap = array(); // maps $pdbkey_Variant => $keys (of link holders)
4477                                 $categoryMap = array(); // maps $category_variant => $category (dbkeys)
4478                                 $varCategories = array(); // category replacements oldDBkey => newDBkey
4479
4480                                 $categories = $this->mOutput->getCategoryLinks();
4481
4482                                 // Add variants of links to link batch
4483                                 foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
4484                                         $title = $this->mLinkHolders['titles'][$key];
4485                                         if ( is_null( $title ) )
4486                                                 continue;
4487
4488                                         $pdbk = $title->getPrefixedDBkey();
4489                                         $titleText = $title->getText();
4490
4491                                         // generate all variants of the link title text
4492                                         $allTextVariants = $wgContLang->convertLinkToAllVariants($titleText);
4493
4494                                         // if link was not found (in first query), add all variants to query
4495                                         if ( !isset($colours[$pdbk]) ){
4496                                                 foreach($allTextVariants as $textVariant){
4497                                                         if($textVariant != $titleText){
4498                                                                 $variantTitle = Title::makeTitle( $ns, $textVariant );
4499                                                                 if(is_null($variantTitle)) continue;
4500                                                                 $linkBatch->addObj( $variantTitle );
4501                                                                 $variantMap[$variantTitle->getPrefixedDBkey()][] = $key;
4502                                                         }
4503                                                 }
4504                                         }
4505                                 }
4506
4507                                 // process categories, check if a category exists in some variant
4508                                 foreach( $categories as $category ){
4509                                         $variants = $wgContLang->convertLinkToAllVariants($category);
4510                                         foreach($variants as $variant){
4511                                                 if($variant != $category){
4512                                                         $variantTitle = Title::newFromDBkey( Title::makeName(NS_CATEGORY,$variant) );
4513                                                         if(is_null($variantTitle)) continue;
4514                                                         $linkBatch->addObj( $variantTitle );
4515                                                         $categoryMap[$variant] = $category;
4516                                                 }
4517                                         }
4518                                 }
4519
4520
4521                                 if(!$linkBatch->isEmpty()){
4522                                         // construct query
4523                                         $titleClause = $linkBatch->constructSet('page', $dbr);
4524
4525                                         $variantQuery =  "SELECT page_id, page_namespace, page_title";
4526                                         if ( $threshold > 0 ) {
4527                                                 $variantQuery .= ', page_len, page_is_redirect';
4528                                         }
4529
4530                                         $variantQuery .= " FROM $page WHERE $titleClause";
4531                                         if ( $options & RLH_FOR_UPDATE ) {
4532                                                 $variantQuery .= ' FOR UPDATE';
4533                                         }
4534
4535                                         $varRes = $dbr->query( $variantQuery, $fname );
4536
4537                                         // for each found variants, figure out link holders and replace
4538                                         while ( $s = $dbr->fetchObject($varRes) ) {
4539
4540                                                 $variantTitle = Title::makeTitle( $s->page_namespace, $s->page_title );
4541                                                 $varPdbk = $variantTitle->getPrefixedDBkey();
4542                                                 $vardbk = $variantTitle->getDBkey();
4543
4544                                                 $holderKeys = array();
4545                                                 if(isset($variantMap[$varPdbk])){
4546                                                         $holderKeys = $variantMap[$varPdbk];
4547                                                         $linkCache->addGoodLinkObj( $s->page_id, $variantTitle );
4548                                                         $this->mOutput->addLink( $variantTitle, $s->page_id );
4549                                                 }
4550
4551                                                 // loop over link holders
4552                                                 foreach($holderKeys as $key){
4553                                                         $title = $this->mLinkHolders['titles'][$key];
4554                                                         if ( is_null( $title ) ) continue;
4555
4556                                                         $pdbk = $title->getPrefixedDBkey();
4557
4558                                                         if(!isset($colours[$pdbk])){
4559                                                                 // found link in some of the variants, replace the link holder data
4560                                                                 $this->mLinkHolders['titles'][$key] = $variantTitle;
4561                                                                 $this->mLinkHolders['dbkeys'][$key] = $variantTitle->getDBkey();
4562
4563                                                                 // set pdbk and colour
4564                                                                 $pdbks[$key] = $varPdbk;
4565                                                                 $colours[$varPdbk] = $sk->getLinkColour( $s, $threshold );
4566                                                                 $linkcolour_ids[$s->page_id] = $pdbk;
4567                                                         }
4568                                                         wfRunHooks( 'GetLinkColours', array( $linkcolour_ids, &$colours ) );
4569                                                 }
4570
4571                                                 // check if the object is a variant of a category
4572                                                 if(isset($categoryMap[$vardbk])){
4573                                                         $oldkey = $categoryMap[$vardbk];
4574                                                         if($oldkey != $vardbk)
4575                                                                 $varCategories[$oldkey]=$vardbk;
4576                                                 }
4577                                         }
4578
4579                                         // rebuild the categories in original order (if there are replacements)
4580                                         if(count($varCategories)>0){
4581                                                 $newCats = array();
4582                                                 $originalCats = $this->mOutput->getCategories();
4583                                                 foreach($originalCats as $cat => $sortkey){
4584                                                         // make the replacement
4585                                                         if( array_key_exists($cat,$varCategories) )
4586                                                                 $newCats[$varCategories[$cat]] = $sortkey;
4587                                                         else $newCats[$cat] = $sortkey;
4588                                                 }
4589                                                 $this->mOutput->setCategoryLinks($newCats);
4590                                         }
4591                                 }
4592                         }
4593
4594                         # Construct search and replace arrays
4595                         wfProfileIn( $fname.'-construct' );
4596                         $replacePairs = array();
4597                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
4598                                 $pdbk = $pdbks[$key];
4599                                 $searchkey = "<!--LINK $key-->";
4600                                 $title = $this->mLinkHolders['titles'][$key];
4601                                 if ( !isset( $colours[$pdbk] ) || $colours[$pdbk] == 'new' ) {
4602                                         $linkCache->addBadLinkObj( $title );
4603                                         $colours[$pdbk] = 'new';
4604                                         $this->mOutput->addLink( $title, 0 );
4605                                         $replacePairs[$searchkey] = $sk->makeBrokenLinkObj( $title,
4606                                                                         $this->mLinkHolders['texts'][$key],
4607                                                                         $this->mLinkHolders['queries'][$key] );
4608                                 } else {
4609                                         $replacePairs[$searchkey] = $sk->makeColouredLinkObj( $title, $colours[$pdbk],
4610                                                                         $this->mLinkHolders['texts'][$key],
4611                                                                         $this->mLinkHolders['queries'][$key] );
4612                                 }
4613                         }
4614                         $replacer = new HashtableReplacer( $replacePairs, 1 );
4615                         wfProfileOut( $fname.'-construct' );
4616
4617                         # Do the thing
4618                         wfProfileIn( $fname.'-replace' );
4619                         $text = preg_replace_callback(
4620                                 '/(<!--LINK .*?-->)/',
4621                                 $replacer->cb(),
4622                                 $text);
4623
4624                         wfProfileOut( $fname.'-replace' );
4625                 }
4626
4627                 # Now process interwiki link holders
4628                 # This is quite a bit simpler than internal links
4629                 if ( !empty( $this->mInterwikiLinkHolders['texts'] ) ) {
4630                         wfProfileIn( $fname.'-interwiki' );
4631                         # Make interwiki link HTML
4632                         $replacePairs = array();
4633                         foreach( $this->mInterwikiLinkHolders['texts'] as $key => $link ) {
4634                                 $title = $this->mInterwikiLinkHolders['titles'][$key];
4635                                 $replacePairs[$key] = $sk->makeLinkObj( $title, $link );
4636                         }
4637                         $replacer = new HashtableReplacer( $replacePairs, 1 );
4638
4639                         $text = preg_replace_callback(
4640                                 '/<!--IWLINK (.*?)-->/',
4641                                 $replacer->cb(),
4642                                 $text );
4643                         wfProfileOut( $fname.'-interwiki' );
4644                 }
4645
4646                 wfProfileOut( $fname );
4647                 return $colours;
4648         }
4649
4650         /**
4651          * Replace <!--LINK--> link placeholders with plain text of links
4652          * (not HTML-formatted).
4653          * @param string $text
4654          * @return string
4655          */
4656         function replaceLinkHoldersText( $text ) {
4657                 $fname = 'Parser::replaceLinkHoldersText';
4658                 wfProfileIn( $fname );
4659
4660                 $text = preg_replace_callback(
4661                         '/<!--(LINK|IWLINK) (.*?)-->/',
4662                         array( &$this, 'replaceLinkHoldersTextCallback' ),
4663                         $text );
4664
4665                 wfProfileOut( $fname );
4666                 return $text;
4667         }
4668
4669         /**
4670          * @param array $matches
4671          * @return string
4672          * @private
4673          */
4674         function replaceLinkHoldersTextCallback( $matches ) {
4675                 $type = $matches[1];
4676                 $key  = $matches[2];
4677                 if( $type == 'LINK' ) {
4678                         if( isset( $this->mLinkHolders['texts'][$key] ) ) {
4679                                 return $this->mLinkHolders['texts'][$key];
4680                         }
4681                 } elseif( $type == 'IWLINK' ) {
4682                         if( isset( $this->mInterwikiLinkHolders['texts'][$key] ) ) {
4683                                 return $this->mInterwikiLinkHolders['texts'][$key];
4684                         }
4685                 }
4686                 return $matches[0];
4687         }
4688
4689         /**
4690          * Tag hook handler for 'pre'.
4691          */
4692         function renderPreTag( $text, $attribs ) {
4693                 // Backwards-compatibility hack
4694                 $content = StringUtils::delimiterReplace( '<nowiki>', '</nowiki>', '$1', $text, 'i' );
4695
4696                 $attribs = Sanitizer::validateTagAttributes( $attribs, 'pre' );
4697                 return wfOpenElement( 'pre', $attribs ) .
4698                         Xml::escapeTagsOnly( $content ) .
4699                         '</pre>';
4700         }
4701
4702         /**
4703          * Renders an image gallery from a text with one line per image.
4704          * text labels may be given by using |-style alternative text. E.g.
4705          *   Image:one.jpg|The number "1"
4706          *   Image:tree.jpg|A tree
4707          * given as text will return the HTML of a gallery with two images,
4708          * labeled 'The number "1"' and
4709          * 'A tree'.
4710          */
4711         function renderImageGallery( $text, $params ) {
4712                 $ig = new ImageGallery();
4713                 $ig->setContextTitle( $this->mTitle );
4714                 $ig->setShowBytes( false );
4715                 $ig->setShowFilename( false );
4716                 $ig->setParser( $this );
4717                 $ig->setHideBadImages();
4718                 $ig->setAttributes( Sanitizer::validateTagAttributes( $params, 'table' ) );
4719                 $ig->useSkin( $this->mOptions->getSkin() );
4720                 $ig->mRevisionId = $this->mRevisionId;
4721
4722                 if( isset( $params['caption'] ) ) {
4723                         $caption = $params['caption'];
4724                         $caption = htmlspecialchars( $caption );
4725                         $caption = $this->replaceInternalLinks( $caption );
4726                         $ig->setCaptionHtml( $caption );
4727                 }
4728                 if( isset( $params['perrow'] ) ) {
4729                         $ig->setPerRow( $params['perrow'] );
4730                 }
4731                 if( isset( $params['widths'] ) ) {
4732                         $ig->setWidths( $params['widths'] );
4733                 }
4734                 if( isset( $params['heights'] ) ) {
4735                         $ig->setHeights( $params['heights'] );
4736                 }
4737
4738                 wfRunHooks( 'BeforeParserrenderImageGallery', array( &$this, &$ig ) );
4739
4740                 $lines = explode( "\n", $text );
4741                 foreach ( $lines as $line ) {
4742                         # match lines like these:
4743                         # Image:someimage.jpg|This is some image
4744                         $matches = array();
4745                         preg_match( "/^([^|]+)(\\|(.*))?$/", $line, $matches );
4746                         # Skip empty lines
4747                         if ( count( $matches ) == 0 ) {
4748                                 continue;
4749                         }
4750                         $tp = Title::newFromText( $matches[1] );
4751                         $nt =& $tp;
4752                         if( is_null( $nt ) ) {
4753                                 # Bogus title. Ignore these so we don't bomb out later.
4754                                 continue;
4755                         }
4756                         if ( isset( $matches[3] ) ) {
4757                                 $label = $matches[3];
4758                         } else {
4759                                 $label = '';
4760                         }
4761
4762                         $pout = $this->parse( $label,
4763                                 $this->mTitle,
4764                                 $this->mOptions,
4765                                 false, // Strip whitespace...?
4766                                 false  // Don't clear state!
4767                         );
4768                         $html = $pout->getText();
4769
4770                         $ig->add( $nt, $html );
4771
4772                         # Only add real images (bug #5586)
4773                         if ( $nt->getNamespace() == NS_IMAGE ) {
4774                                 $this->mOutput->addImage( $nt->getDBkey() );
4775                         }
4776                 }
4777                 return $ig->toHTML();
4778         }
4779
4780         function getImageParams( $handler ) {
4781                 if ( $handler ) {
4782                         $handlerClass = get_class( $handler );
4783                 } else {
4784                         $handlerClass = '';
4785                 }
4786                 if ( !isset( $this->mImageParams[$handlerClass]  ) ) {
4787                         // Initialise static lists
4788                         static $internalParamNames = array(
4789                                 'horizAlign' => array( 'left', 'right', 'center', 'none' ),
4790                                 'vertAlign' => array( 'baseline', 'sub', 'super', 'top', 'text-top', 'middle',
4791                                         'bottom', 'text-bottom' ),
4792                                 'frame' => array( 'thumbnail', 'manualthumb', 'framed', 'frameless',
4793                                         'upright', 'border' ),
4794                         );
4795                         static $internalParamMap;
4796                         if ( !$internalParamMap ) {
4797                                 $internalParamMap = array();
4798                                 foreach ( $internalParamNames as $type => $names ) {
4799                                         foreach ( $names as $name ) {
4800                                                 $magicName = str_replace( '-', '_', "img_$name" );
4801                                                 $internalParamMap[$magicName] = array( $type, $name );
4802                                         }
4803                                 }
4804                         }
4805
4806                         // Add handler params
4807                         $paramMap = $internalParamMap;
4808                         if ( $handler ) {
4809                                 $handlerParamMap = $handler->getParamMap();
4810                                 foreach ( $handlerParamMap as $magic => $paramName ) {
4811                                         $paramMap[$magic] = array( 'handler', $paramName );
4812                                 }
4813                         }
4814                         $this->mImageParams[$handlerClass] = $paramMap;
4815                         $this->mImageParamsMagicArray[$handlerClass] = new MagicWordArray( array_keys( $paramMap ) );
4816                 }
4817                 return array( $this->mImageParams[$handlerClass], $this->mImageParamsMagicArray[$handlerClass] );
4818         }
4819
4820         /**
4821          * Parse image options text and use it to make an image
4822          */
4823         function makeImage( $title, $options ) {
4824                 # @TODO: let the MediaHandler specify its transform parameters
4825                 #
4826                 # Check if the options text is of the form "options|alt text"
4827                 # Options are:
4828                 #  * thumbnail          make a thumbnail with enlarge-icon and caption, alignment depends on lang
4829                 #  * left               no resizing, just left align. label is used for alt= only
4830                 #  * right              same, but right aligned
4831                 #  * none               same, but not aligned
4832                 #  * ___px              scale to ___ pixels width, no aligning. e.g. use in taxobox
4833                 #  * center             center the image
4834                 #  * framed             Keep original image size, no magnify-button.
4835                 #  * frameless          like 'thumb' but without a frame. Keeps user preferences for width
4836                 #  * upright            reduce width for upright images, rounded to full __0 px
4837                 #  * border             draw a 1px border around the image
4838                 # vertical-align values (no % or length right now):
4839                 #  * baseline
4840                 #  * sub
4841                 #  * super
4842                 #  * top
4843                 #  * text-top
4844                 #  * middle
4845                 #  * bottom
4846                 #  * text-bottom
4847
4848                 $parts = array_map( 'trim', explode( '|', $options) );
4849                 $sk = $this->mOptions->getSkin();
4850
4851                 # Give extensions a chance to select the file revision for us
4852                 $skip = $time = false;
4853                 wfRunHooks( 'BeforeParserMakeImageLinkObj', array( &$this, &$title, &$skip, &$time ) );
4854
4855                 if ( $skip ) {
4856                         return $sk->makeLinkObj( $title );
4857                 }
4858
4859                 # Get parameter map
4860                 $file = wfFindFile( $title, $time );
4861                 $handler = $file ? $file->getHandler() : false;
4862
4863                 list( $paramMap, $mwArray ) = $this->getImageParams( $handler );
4864
4865                 # Process the input parameters
4866                 $caption = '';
4867                 $params = array( 'frame' => array(), 'handler' => array(),
4868                         'horizAlign' => array(), 'vertAlign' => array() );
4869                 foreach( $parts as $part ) {
4870                         list( $magicName, $value ) = $mwArray->matchVariableStartToEnd( $part );
4871                         if ( isset( $paramMap[$magicName] ) ) {
4872                                 list( $type, $paramName ) = $paramMap[$magicName];
4873                                 $params[$type][$paramName] = $value;
4874
4875                                 // Special case; width and height come in one variable together
4876                                 if( $type == 'handler' && $paramName == 'width' ) {
4877                                         $m = array();
4878                                         if ( preg_match( '/^([0-9]*)x([0-9]*)$/', $value, $m ) ) {
4879                                                 $params[$type]['width'] = intval( $m[1] );
4880                                                 $params[$type]['height'] = intval( $m[2] );
4881                                         } else {
4882                                                 $params[$type]['width'] = intval( $value );
4883                                         }
4884                                 }
4885                         } else {
4886                                 $caption = $part;
4887                         }
4888                 }
4889
4890                 # Process alignment parameters
4891                 if ( $params['horizAlign'] ) {
4892                         $params['frame']['align'] = key( $params['horizAlign'] );
4893                 }
4894                 if ( $params['vertAlign'] ) {
4895                         $params['frame']['valign'] = key( $params['vertAlign'] );
4896                 }
4897
4898                 # Validate the handler parameters
4899                 if ( $handler ) {
4900                         foreach ( $params['handler'] as $name => $value ) {
4901                                 if ( !$handler->validateParam( $name, $value ) ) {
4902                                         unset( $params['handler'][$name] );
4903                                 }
4904                         }
4905                 }
4906
4907                 # Strip bad stuff out of the alt text
4908                 $alt = $this->replaceLinkHoldersText( $caption );
4909
4910                 # make sure there are no placeholders in thumbnail attributes
4911                 # that are later expanded to html- so expand them now and
4912                 # remove the tags
4913                 $alt = $this->mStripState->unstripBoth( $alt );
4914                 $alt = Sanitizer::stripAllTags( $alt );
4915
4916                 $params['frame']['alt'] = $alt;
4917                 $params['frame']['caption'] = $caption;
4918
4919                 # Linker does the rest
4920                 $ret = $sk->makeImageLink2( $title, $file, $params['frame'], $params['handler'] );
4921
4922                 # Give the handler a chance to modify the parser object
4923                 if ( $handler ) {
4924                         $handler->parserTransformHook( $this, $file );
4925                 }
4926
4927                 return $ret;
4928         }
4929
4930         /**
4931          * Set a flag in the output object indicating that the content is dynamic and
4932          * shouldn't be cached.
4933          */
4934         function disableCache() {
4935                 wfDebug( "Parser output marked as uncacheable.\n" );
4936                 $this->mOutput->mCacheTime = -1;
4937         }
4938
4939         /**#@+
4940          * Callback from the Sanitizer for expanding items found in HTML attribute
4941          * values, so they can be safely tested and escaped.
4942          * @param string $text
4943          * @param PPFrame $frame
4944          * @return string
4945          * @private
4946          */
4947         function attributeStripCallback( &$text, $frame = false ) {
4948                 $text = $this->replaceVariables( $text, $frame );
4949                 $text = $this->mStripState->unstripBoth( $text );
4950                 return $text;
4951         }
4952
4953         /**#@-*/
4954
4955         /**#@+
4956          * Accessor/mutator
4957          */
4958         function Title( $x = NULL ) { return wfSetVar( $this->mTitle, $x ); }
4959         function Options( $x = NULL ) { return wfSetVar( $this->mOptions, $x ); }
4960         function OutputType( $x = NULL ) { return wfSetVar( $this->mOutputType, $x ); }
4961         /**#@-*/
4962
4963         /**#@+
4964          * Accessor
4965          */
4966         function getTags() { return array_merge( array_keys($this->mTransparentTagHooks), array_keys( $this->mTagHooks ) ); }
4967         /**#@-*/
4968
4969
4970         /**
4971          * Break wikitext input into sections, and either pull or replace
4972          * some particular section's text.
4973          *
4974          * External callers should use the getSection and replaceSection methods.
4975          *
4976          * @param string $text Page wikitext
4977          * @param string $section A section identifier string of the form:
4978          *   <flag1> - <flag2> - ... - <section number>
4979          *
4980          * Currently the only recognised flag is "T", which means the target section number
4981          * was derived during a template inclusion parse, in other words this is a template
4982          * section edit link. If no flags are given, it was an ordinary section edit link.
4983          * This flag is required to avoid a section numbering mismatch when a section is
4984          * enclosed by <includeonly> (bug 6563).
4985          *
4986          * The section number 0 pulls the text before the first heading; other numbers will
4987          * pull the given section along with its lower-level subsections. If the section is
4988          * not found, $mode=get will return $newtext, and $mode=replace will return $text.
4989          *
4990          * @param string $mode One of "get" or "replace"
4991          * @param string $newText Replacement text for section data.
4992          * @return string for "get", the extracted section text.
4993          *                for "replace", the whole page with the section replaced.
4994          */
4995         private function extractSections( $text, $section, $mode, $newText='' ) {
4996                 global $wgTitle;
4997                 $this->clearState();
4998                 $this->mTitle = $wgTitle; // not generally used but removes an ugly failure mode
4999                 $this->mOptions = new ParserOptions;
5000                 $this->setOutputType( OT_WIKI );
5001                 $curIndex = 0;
5002                 $outText = '';
5003                 $frame = new PPFrame( $this );
5004
5005                 // Process section extraction flags
5006                 $flags = 0;
5007                 $sectionParts = explode( '-', $section );
5008                 $sectionIndex = array_pop( $sectionParts );
5009                 foreach ( $sectionParts as $part ) {
5010                         if ( $part == 'T' ) {
5011                                 $flags |= self::PTD_FOR_INCLUSION;
5012                         }
5013                 }
5014                 // Preprocess the text
5015                 $dom = $this->preprocessToDom( $text, $flags );
5016                 $root = $dom->documentElement;
5017
5018                 // <h> nodes indicate section breaks
5019                 // They can only occur at the top level, so we can find them by iterating the root's children
5020                 $node = $root->firstChild;
5021
5022                 // Find the target section
5023                 if ( $sectionIndex == 0 ) {
5024                         // Section zero doesn't nest, level=big
5025                         $targetLevel = 1000;
5026                 } else {
5027                         while ( $node ) {
5028                                 if ( $node->nodeName == 'h' ) {
5029                                         if ( $curIndex + 1 == $sectionIndex ) {
5030                                                 break;
5031                                         }
5032                                         $curIndex++;
5033                                 }
5034                                 if ( $mode == 'replace' ) {
5035                                         $outText .= $frame->expand( $node, PPFrame::RECOVER_ORIG );
5036                                 }
5037                                 $node = $node->nextSibling;
5038                         }
5039                         if ( $node ) {
5040                                 $targetLevel = $node->getAttribute( 'level' );
5041                         }
5042                 }
5043
5044                 if ( !$node ) {
5045                         // Not found
5046                         if ( $mode == 'get' ) {
5047                                 return $newText;
5048                         } else {
5049                                 return $text;
5050                         }
5051                 }
5052
5053                 // Find the end of the section, including nested sections
5054                 do {
5055                         if ( $node->nodeName == 'h' ) {
5056                                 $curIndex++;
5057                                 $curLevel = $node->getAttribute( 'level' );
5058                                 if ( $curIndex != $sectionIndex && $curLevel <= $targetLevel ) {
5059                                         break;
5060                                 }
5061                         }
5062                         if ( $mode == 'get' ) {
5063                                 $outText .= $frame->expand( $node, PPFrame::RECOVER_ORIG );
5064                         }
5065                         $node = $node->nextSibling;
5066                 } while ( $node );
5067
5068                 // Write out the remainder (in replace mode only)
5069                 if ( $mode == 'replace' ) {
5070                         // Output the replacement text
5071                         // Add two newlines on -- trailing whitespace in $newText is conventionally
5072                         // stripped by the editor, so we need both newlines to restore the paragraph gap
5073                         $outText .= $newText . "\n\n";
5074                         while ( $node ) {
5075                                 $outText .= $frame->expand( $node, PPFrame::RECOVER_ORIG );
5076                                 $node = $node->nextSibling;
5077                         }
5078                 }
5079
5080                 if ( is_string( $outText ) ) {
5081                         // Re-insert stripped tags
5082                         $outText = trim( $this->mStripState->unstripBoth( $outText ) );
5083                 }
5084
5085                 return $outText;
5086         }
5087
5088         /**
5089          * This function returns the text of a section, specified by a number ($section).
5090          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
5091          * the first section before any such heading (section 0).
5092          *
5093          * If a section contains subsections, these are also returned.
5094          *
5095          * @param string $text text to look in
5096          * @param string $section section identifier
5097          * @param string $deftext default to return if section is not found
5098          * @return string text of the requested section
5099          */
5100         public function getSection( $text, $section, $deftext='' ) {
5101                 return $this->extractSections( $text, $section, "get", $deftext );
5102         }
5103
5104         public function replaceSection( $oldtext, $section, $text ) {
5105                 return $this->extractSections( $oldtext, $section, "replace", $text );
5106         }
5107
5108         /**
5109          * Get the timestamp associated with the current revision, adjusted for
5110          * the default server-local timestamp
5111          */
5112         function getRevisionTimestamp() {
5113                 if ( is_null( $this->mRevisionTimestamp ) ) {
5114                         wfProfileIn( __METHOD__ );
5115                         global $wgContLang;
5116                         $dbr = wfGetDB( DB_SLAVE );
5117                         $timestamp = $dbr->selectField( 'revision', 'rev_timestamp',
5118                                         array( 'rev_id' => $this->mRevisionId ), __METHOD__ );
5119
5120                         // Normalize timestamp to internal MW format for timezone processing.
5121                         // This has the added side-effect of replacing a null value with
5122                         // the current time, which gives us more sensible behavior for
5123                         // previews.
5124                         $timestamp = wfTimestamp( TS_MW, $timestamp );
5125
5126                         // The cryptic '' timezone parameter tells to use the site-default
5127                         // timezone offset instead of the user settings.
5128                         //
5129                         // Since this value will be saved into the parser cache, served
5130                         // to other users, and potentially even used inside links and such,
5131                         // it needs to be consistent for all visitors.
5132                         $this->mRevisionTimestamp = $wgContLang->userAdjust( $timestamp, '' );
5133
5134                         wfProfileOut( __METHOD__ );
5135                 }
5136                 return $this->mRevisionTimestamp;
5137         }
5138
5139         /**
5140          * Mutator for $mDefaultSort
5141          *
5142          * @param $sort New value
5143          */
5144         public function setDefaultSort( $sort ) {
5145                 $this->mDefaultSort = $sort;
5146         }
5147
5148         /**
5149          * Accessor for $mDefaultSort
5150          * Will use the title/prefixed title if none is set
5151          *
5152          * @return string
5153          */
5154         public function getDefaultSort() {
5155                 if( $this->mDefaultSort !== false ) {
5156                         return $this->mDefaultSort;
5157                 } else {
5158                         return $this->mTitle->getNamespace() == NS_CATEGORY
5159                                         ? $this->mTitle->getText()
5160                                         : $this->mTitle->getPrefixedText();
5161                 }
5162         }
5163
5164         /**
5165          * Try to guess the section anchor name based on a wikitext fragment
5166          * presumably extracted from a heading, for example "Header" from
5167          * "== Header ==".
5168          */
5169         public function guessSectionNameFromWikiText( $text ) {
5170                 # Strip out wikitext links(they break the anchor)
5171                 $text = $this->stripSectionName( $text );
5172                 $headline = Sanitizer::decodeCharReferences( $text );
5173                 # strip out HTML
5174                 $headline = StringUtils::delimiterReplace( '<', '>', '', $headline );
5175                 $headline = trim( $headline );
5176                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
5177                 $replacearray = array(
5178                         '%3A' => ':',
5179                         '%' => '.'
5180                 );
5181                 return str_replace(
5182                         array_keys( $replacearray ),
5183                         array_values( $replacearray ),
5184                         $sectionanchor );
5185         }
5186
5187         /**
5188          * Strips a text string of wikitext for use in a section anchor
5189          *
5190          * Accepts a text string and then removes all wikitext from the
5191          * string and leaves only the resultant text (i.e. the result of
5192          * [[User:WikiSysop|Sysop]] would be "Sysop" and the result of
5193          * [[User:WikiSysop]] would be "User:WikiSysop") - this is intended
5194          * to create valid section anchors by mimicing the output of the
5195          * parser when headings are parsed.
5196          *
5197          * @param $text string Text string to be stripped of wikitext
5198          * for use in a Section anchor
5199          * @return Filtered text string
5200          */
5201         public function stripSectionName( $text ) {
5202                 # Strip internal link markup
5203                 $text = preg_replace('/\[\[:?([^[|]+)\|([^[]+)\]\]/','$2',$text);
5204                 $text = preg_replace('/\[\[:?([^[]+)\|?\]\]/','$1',$text);
5205
5206                 # Strip external link markup (FIXME: Not Tolerant to blank link text
5207                 # I.E. [http://www.mediawiki.org] will render as [1] or something depending
5208                 # on how many empty links there are on the page - need to figure that out.
5209                 $text = preg_replace('/\[(?:' . wfUrlProtocols() . ')([^ ]+?) ([^[]+)\]/','$2',$text);
5210
5211                 # Parse wikitext quotes (italics & bold)
5212                 $text = $this->doQuotes($text);
5213
5214                 # Strip HTML tags
5215                 $text = StringUtils::delimiterReplace( '<', '>', '', $text );
5216                 return $text;
5217         }
5218
5219         /**
5220          * strip/replaceVariables/unstrip for preprocessor regression testing
5221          */
5222         function srvus( $text ) {
5223                 $text = $this->replaceVariables( $text );
5224                 $text = $this->mStripState->unstripBoth( $text );
5225                 $text = Sanitizer::removeHTMLtags( $text );
5226                 return $text;
5227         }
5228 }
5229
5230 /**
5231  * @todo document, briefly.
5232  * @addtogroup Parser
5233  */
5234 class OnlyIncludeReplacer {
5235         var $output = '';
5236
5237         function replace( $matches ) {
5238                 if ( substr( $matches[1], -1 ) == "\n" ) {
5239                         $this->output .= substr( $matches[1], 0, -1 );
5240                 } else {
5241                         $this->output .= $matches[1];
5242                 }
5243         }
5244 }
5245
5246 /**
5247  * @todo document, briefly.
5248  * @addtogroup Parser
5249  */
5250 class StripState {
5251         var $general, $nowiki;
5252
5253         function __construct() {
5254                 $this->general = new ReplacementArray;
5255                 $this->nowiki = new ReplacementArray;
5256         }
5257
5258         function unstripGeneral( $text ) {
5259                 wfProfileIn( __METHOD__ );
5260                 do {
5261                         $oldText = $text;
5262                         $text = $this->general->replace( $text );
5263                 } while ( $text != $oldText );
5264                 wfProfileOut( __METHOD__ );
5265                 return $text;
5266         }
5267
5268         function unstripNoWiki( $text ) {
5269                 wfProfileIn( __METHOD__ );
5270                 do {
5271                         $oldText = $text;
5272                         $text = $this->nowiki->replace( $text );
5273                 } while ( $text != $oldText );
5274                 wfProfileOut( __METHOD__ );
5275                 return $text;
5276         }
5277
5278         function unstripBoth( $text ) {
5279                 wfProfileIn( __METHOD__ );
5280                 do {
5281                         $oldText = $text;
5282                         $text = $this->general->replace( $text );
5283                         $text = $this->nowiki->replace( $text );
5284                 } while ( $text != $oldText );
5285                 wfProfileOut( __METHOD__ );
5286                 return $text;
5287         }
5288 }
5289
5290 /**
5291  * An expansion frame, used as a context to expand the result of preprocessToDom()
5292  */
5293 class PPFrame {
5294         var $parser, $title;
5295         var $titleCache;
5296
5297         const NO_ARGS = 1;
5298         const NO_TEMPLATES = 2;
5299         const STRIP_COMMENTS = 4;
5300         const NO_IGNORE = 8;
5301
5302         const RECOVER_ORIG = 11;
5303
5304         /**
5305          * Construct a new preprocessor frame.
5306          * @param Parser $parser The parent parser
5307          * @param Title $title The context title, or false if there isn't one
5308          */
5309         function __construct( $parser ) {
5310                 $this->parser = $parser;
5311                 $this->title = $parser->mTitle;
5312                 $this->titleCache = array( $this->title ? $this->title->getPrefixedDBkey() : false );
5313         }
5314
5315         /**
5316          * Create a new child frame
5317          * $args is optionally a DOMNodeList containing the template arguments
5318          */
5319         function newChild( $args = false, $title = false ) {
5320                 $assocArgs = array();
5321                 if ( $title === false ) {
5322                         $title = $this->title;
5323                 }
5324                 if ( $args !== false ) {
5325                         $xpath = false;
5326                         foreach ( $args as $arg ) {
5327                                 if ( !$xpath ) {
5328                                         $xpath = new DOMXPath( $arg->ownerDocument );
5329                                 }
5330
5331                                 $nameNodes = $xpath->query( 'name', $arg );
5332                                 if ( $nameNodes->item( 0 )->hasAttributes() ) {
5333                                         // Numbered parameter
5334                                         $name = $nameNodes->item( 0 )->attributes->getNamedItem( 'index' )->textContent;
5335                                 } else {
5336                                         // Named parameter
5337                                         $name = $this->expand( $nameNodes->item( 0 ), PPFrame::STRIP_COMMENTS );
5338                                 }
5339
5340                                 $value = $xpath->query( 'value', $arg );
5341                                 $assocArgs[$name] = $value->item( 0 );
5342                         }
5343                 }
5344                 return new PPTemplateFrame( $this->parser, $this, $assocArgs, $title );
5345         }
5346
5347         /**
5348          * Expand a DOMNode describing a preprocessed document into plain wikitext,
5349          * using the current context
5350          * @param $root the node
5351          */
5352         function expand( $root, $flags = 0 ) {
5353                 if ( is_string( $root ) ) {
5354                         return $root;
5355                 }
5356
5357                 if ( $this->parser->ot['html']
5358                         && ++$this->parser->mPPNodeCount > $this->parser->mOptions->mMaxPPNodeCount )
5359                 {
5360                         return $this->parser->insertStripItem( '<!-- node-count limit exceeded -->' );
5361                 }
5362
5363                 if ( is_array( $root ) ) {
5364                         $s = '';
5365                         foreach ( $root as $node ) {
5366                                 $s .= $this->expand( $node, $flags );
5367                         }
5368                 } elseif ( $root instanceof DOMNodeList ) {
5369                         $s = '';
5370                         foreach ( $root as $node ) {
5371                                 $s .= $this->expand( $node, $flags );
5372                         }
5373                 } elseif ( $root instanceof DOMNode ) {
5374                         if ( $root->nodeType == XML_TEXT_NODE ) {
5375                                 $s = $root->nodeValue;
5376                         } elseif ( $root->nodeName == 'template' ) {
5377                                 # Double-brace expansion
5378                                 $xpath = new DOMXPath( $root->ownerDocument );
5379                                 $titles = $xpath->query( 'title', $root );
5380                                 $title = $titles->item( 0 );
5381                                 $parts = $xpath->query( 'part', $root );
5382                                 if ( $flags & self::NO_TEMPLATES ) {
5383                                         $s = '{{' . $this->implodeWithFlags( '|', $flags, $title, $parts ) . '}}';
5384                                 } else {
5385                                         $lineStart = $root->getAttribute( 'lineStart' );
5386                                         $params = array(
5387                                                 'title' => $title,
5388                                                 'parts' => $parts,
5389                                                 'lineStart' => $lineStart,
5390                                                 'text' => 'FIXME' );
5391                                         $s = $this->parser->braceSubstitution( $params, $this );
5392                                 }
5393                         } elseif ( $root->nodeName == 'tplarg' ) {
5394                                 # Triple-brace expansion
5395                                 $xpath = new DOMXPath( $root->ownerDocument );
5396                                 $titles = $xpath->query( 'title', $root );
5397                                 $title = $titles->item( 0 );
5398                                 $parts = $xpath->query( 'part', $root );
5399                                 if ( $flags & self::NO_ARGS || $this->parser->ot['msg'] ) {
5400                                         $s = '{{{' . $this->implodeWithFlags( '|', $flags, $title, $parts ) . '}}}';
5401                                 } else {
5402                                         $params = array( 'title' => $title, 'parts' => $parts, 'text' => 'FIXME' );
5403                                         $s = $this->parser->argSubstitution( $params, $this );
5404                                 }
5405                         } elseif ( $root->nodeName == 'comment' ) {
5406                                 # HTML-style comment
5407                                 if ( $this->parser->ot['html']
5408                                         || ( $this->parser->ot['pre'] && $this->mOptions->getRemoveComments() )
5409                                         || ( $flags & self::STRIP_COMMENTS ) )
5410                                 {
5411                                         $s = '';
5412                                 } else {
5413                                         $s = $root->textContent;
5414                                 }
5415                         } elseif ( $root->nodeName == 'ignore' ) {
5416                                 # Output suppression used by <includeonly> etc.
5417                                 # OT_WIKI will only respect <ignore> in substed templates.
5418                                 # The other output types respect it unless NO_IGNORE is set.
5419                                 # extractSections() sets NO_IGNORE and so never respects it.
5420                                 if ( ( !isset( $this->parent ) && $this->parser->ot['wiki'] ) || ( $flags & self::NO_IGNORE ) ) {
5421                                         $s = $root->textContent;
5422                                 } else {
5423                                         $s = '';
5424                                 }
5425                         } elseif ( $root->nodeName == 'ext' ) {
5426                                 # Extension tag
5427                                 $xpath = new DOMXPath( $root->ownerDocument );
5428                                 $names = $xpath->query( 'name', $root );
5429                                 $attrs = $xpath->query( 'attr', $root );
5430                                 $inners = $xpath->query( 'inner', $root );
5431                                 $closes = $xpath->query( 'close', $root );
5432                                 $params = array(
5433                                         'name' => $names->item( 0 ),
5434                                         'attr' => $attrs->length > 0 ? $attrs->item( 0 ) : null,
5435                                         'inner' => $inners->length > 0 ? $inners->item( 0 ) : null,
5436                                         'close' => $closes->length > 0 ? $closes->item( 0 ) : null,
5437                                 );
5438                                 $s = $this->parser->extensionSubstitution( $params, $this );
5439                         } elseif ( $root->nodeName == 'h' ) {
5440                                 # Heading
5441                                 $s = $this->expand( $root->childNodes, $flags );
5442
5443                                 if ( $this->parser->ot['html'] ) {
5444                                         # Insert heading index marker
5445                                         $headingIndex = $root->getAttribute( 'i' );
5446                                         $titleText = $this->title->getPrefixedDBkey();
5447                                         $this->parser->mHeadings[] = array( $titleText, $headingIndex );
5448                                         $serial = count( $this->parser->mHeadings ) - 1;
5449                                         $marker = "{$this->parser->mUniqPrefix}-h-$serial-{$this->parser->mMarkerSuffix}";
5450                                         $count = $root->getAttribute( 'level' );
5451                                         $s = substr( $s, 0, $count ) . $marker . substr( $s, $count );
5452                                         $this->parser->mStripState->general->setPair( $marker, '' );
5453                                 }
5454                         } else {
5455                                 # Generic recursive expansion
5456                                 $s = '';
5457                                 for ( $node = $root->firstChild; $node; $node = $node->nextSibling ) {
5458                                         if ( $node->nodeType == XML_TEXT_NODE ) {
5459                                                 $s .= $node->nodeValue;
5460                                         } elseif ( $node->nodeType == XML_ELEMENT_NODE ) {
5461                                                 $s .= $this->expand( $node, $flags );
5462                                         }
5463                                 }
5464                         }
5465                 } else {
5466                         throw new MWException( __METHOD__.': Invalid parameter type' );
5467                 }
5468                 return $s;
5469         }
5470
5471         function implodeWithFlags( $sep, $flags /*, ... */ ) {
5472                 $args = array_slice( func_get_args(), 2 );
5473
5474                 $first = true;
5475                 $s = '';
5476                 foreach ( $args as $root ) {
5477                         if ( !is_array( $root ) && !( $root instanceof DOMNodeList ) ) {
5478                                 $root = array( $root );
5479                         }
5480                         foreach ( $root as $node ) {
5481                                 if ( $first ) {
5482                                         $first = false;
5483                                 } else {
5484                                         $s .= $sep;
5485                                 }
5486                                 $s .= $this->expand( $node, $flags );
5487                         }
5488                 }
5489                 return $s;
5490         }
5491
5492         function implode( $sep /*, ... */ ) {
5493                 $args = func_get_args();
5494                 $args = array_merge( array_slice( $args, 0, 1 ), array( 0 ), array_slice( $args, 1 ) );
5495                 return call_user_func_array( array( $this, 'implodeWithFlags' ), $args );
5496         }
5497
5498         /**
5499          * Split an <arg> or <template> node into a three-element array:
5500          *    DOMNode name, string index and DOMNode value
5501          */
5502         function splitBraceNode( $node ) {
5503                 $xpath = new DOMXPath( $node->ownerDocument );
5504                 $names = $xpath->query( 'name', $node );
5505                 $values = $xpath->query( 'value', $node );
5506                 if ( !$names->length || !$values->length ) {
5507                         throw new MWException( 'Invalid brace node passed to ' . __METHOD__ );
5508                 }
5509                 $name = $names->item( 0 );
5510                 $index = $name->getAttribute( 'index' );
5511                 return array( $name, $index, $values->item( 0 ) );
5512         }
5513
5514         /**
5515          * Split an <ext> node into an associative array containing name, attr, inner and close
5516          * All values in the resulting array are DOMNodes. Inner and close are optional.
5517          */
5518         function splitExtNode( $node ) {
5519                 $xpath = new DOMXPath( $node->ownerDocument );
5520                 $names = $xpath->query( 'name', $node );
5521                 $attrs = $xpath->query( 'attr', $node );
5522                 $inners = $xpath->query( 'inner', $node );
5523                 $closes = $xpath->query( 'close', $node );
5524                 if ( !$names->length || !$attrs->length ) {
5525                         throw new MWException( 'Invalid ext node passed to ' . __METHOD__ );
5526                 }
5527                 $parts = array(
5528                         'name' => $names->item( 0 ),
5529                         'attr' => $attrs->item( 0 ) );
5530                 if ( $inners->length ) {
5531                         $parts['inner'] = $inners->item( 0 );
5532                 }
5533                 if ( $closes->length ) {
5534                         $parts['close'] = $closes->item( 0 );
5535                 }
5536                 return $parts;
5537         }
5538
5539         function __toString() {
5540                 return 'frame{}';
5541         }
5542
5543         function getPDBK( $level = false ) {
5544                 if ( $level === false ) {
5545                         return $this->title->getPrefixedDBkey();
5546                 } else {
5547                         return isset( $this->titleCache[$level] ) ? $this->titleCache[$level] : false;
5548                 }
5549         }
5550 }
5551
5552 /**
5553  * Expansion frame with template arguments
5554  */
5555 class PPTemplateFrame extends PPFrame {
5556         var $parser, $args, $parent;
5557         var $titleCache;
5558
5559         function __construct( $parser, $parent = false, $args = array(), $title = false ) {
5560                 $this->parser = $parser;
5561                 $this->parent = $parent;
5562                 $this->args = $args;
5563                 $this->title = $title;
5564                 $this->titleCache = $parent->titleCache;
5565                 $this->titleCache[] = $title ? $title->getPrefixedDBkey() : false;
5566         }
5567
5568         function __toString() {
5569                 $s = 'tplframe{';
5570                 $first = true;
5571                 foreach ( $this->args as $name => $value ) {
5572                         if ( $first ) {
5573                                 $first = false;
5574                         } else {
5575                                 $s .= ', ';
5576                         }
5577                         $s .= "\"$name\":\"" .
5578                                 str_replace( '"', '\\"', $value->ownerDocument->saveXML( $value ) ) . '"';
5579                 }
5580                 $s .= '}';
5581                 return $s;
5582         }
5583 }
5584