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 five main entry points into the Parser class:
  19  * parse()
  20  *   produces HTML output
  21  * preSaveTransform().
  22  *   produces altered wiki markup.
  23  * preprocess()
  24  *   removes HTML comments and expands templates
  25  * cleanSig()
  26  *   Cleans a signature before saving it to preferences
  27  * extractSections()
  28  *   Extracts sections from an article for section editing
  29  *
  30  * Globals used:
  31  *    objects:   $wgLang, $wgContLang
  32  *
  33  * NOT $wgArticle, $wgUser or $wgTitle. Keep them away!
  34  *
  35  * settings:
  36  *  $wgUseTex*, $wgUseDynamicDates*, $wgInterwikiMagic*,
  37  *  $wgNamespacesWithSubpages, $wgAllowExternalImages*,
  38  *  $wgLocaltimezone, $wgAllowSpecialInclusion*,
  39  *  $wgMaxArticleSize*
  40  *
  41  *  * only within ParserOptions
  42  * </pre>
  43  *
  44  * @addtogroup Parser
  45  */
  46 class Parser
  47 {
  48         /**
  49          * Update this version number when the ParserOutput format
  50          * changes in an incompatible way, so the parser cache
  51          * can automatically discard old data.
  52          */
  53         const VERSION = '1.6.4';
  54
  55         # Flags for Parser::setFunctionHook
  56         # Also available as global constants from Defines.php
  57         const SFH_NO_HASH = 1;
  58         const SFH_OBJECT_ARGS = 2;
  59
  60         # Constants needed for external link processing
  61         # Everything except bracket, space, or control characters
  62         const EXT_LINK_URL_CLASS = '[^][<>"\\x00-\\x20\\x7F]';
  63         const EXT_IMAGE_REGEX = '/^(http:\/\/|https:\/\/)([^][<>"\\x00-\\x20\\x7F]+)
  64                 \\/([A-Za-z0-9_.,~%\\-+&;#*?!=()@\\x80-\\xFF]+)\\.((?i)gif|png|jpg|jpeg)$/Sx';
  65
  66         // State constants for the definition list colon extraction
  67         const COLON_STATE_TEXT = 0;
  68         const COLON_STATE_TAG = 1;
  69         const COLON_STATE_TAGSTART = 2;
  70         const COLON_STATE_CLOSETAG = 3;
  71         const COLON_STATE_TAGSLASH = 4;
  72         const COLON_STATE_COMMENT = 5;
  73         const COLON_STATE_COMMENTDASH = 6;
  74         const COLON_STATE_COMMENTDASHDASH = 7;
  75
  76         // Flags for preprocessToDom
  77         const PTD_FOR_INCLUSION = 1;
  78
  79         // Allowed values for $this->mOutputType
  80         // Parameter to startExternalParse().
  81         const OT_HTML = 1;
  82         const OT_WIKI = 2;
  83         const OT_PREPROCESS = 3;
  84         const OT_MSG = 3;
  85
  86         // Marker Suffix needs to be accessible staticly.
  87         const MARKER_SUFFIX = "-QINU\x7f";
  88
  89         /**#@+
  90          * @private
  91          */
  92         # Persistent:
  93         var $mTagHooks, $mTransparentTagHooks, $mFunctionHooks, $mFunctionSynonyms, $mVariables,
  94                 $mImageParams, $mImageParamsMagicArray, $mStripList, $mMarkerIndex, $mPreprocessor,
  95                 $mExtLinkBracketedRegex, $mDefaultStripList, $mVarCache, $mConf;
  96
  97
  98         # Cleared with clearState():
  99         var $mOutput, $mAutonumber, $mDTopen, $mStripState;
 100         var $mIncludeCount, $mArgStack, $mLastSection, $mInPre;
 101         var $mInterwikiLinkHolders, $mLinkHolders;
 102         var $mIncludeSizes, $mPPNodeCount, $mDefaultSort;
 103         var $mTplExpandCache; // empty-frame expansion cache
 104         var $mTplRedirCache, $mTplDomCache, $mHeadings, $mDoubleUnderscores;
 105
 106         # Temporary
 107         # These are variables reset at least once per parse regardless of $clearState
 108         var $mOptions,      // ParserOptions object
 109                 $mTitle,        // Title context, used for self-link rendering and similar things
 110                 $mOutputType,   // Output type, one of the OT_xxx constants
 111                 $ot,            // Shortcut alias, see setOutputType()
 112                 $mRevisionId,   // ID to display in {{REVISIONID}} tags
 113                 $mRevisionTimestamp, // The timestamp of the specified revision ID
 114                 $mRevIdForTs;   // The revision ID which was used to fetch the timestamp
 115
 116         /**#@-*/
 117
 118         /**
 119          * Constructor
 120          *
 121          * @public
 122          */
 123         function __construct( $conf = array() ) {
 124                 $this->mConf = $conf;
 125                 $this->mTagHooks = array();
 126                 $this->mTransparentTagHooks = array();
 127                 $this->mFunctionHooks = array();
 128                 $this->mFunctionSynonyms = array( 0 => array(), 1 => array() );
 129                 $this->mDefaultStripList = $this->mStripList = array( 'nowiki', 'gallery' );
 130                 $this->mExtLinkBracketedRegex = '/\[(\b(' . wfUrlProtocols() . ')'.
 131                         '[^][<>"\\x00-\\x20\\x7F]+) *([^\]\\x0a\\x0d]*?)\]/S';
 132                 $this->mVarCache = array();
 133                 if ( isset( $conf['preprocessorClass'] ) ) {
 134                         $this->mPreprocessorClass = $conf['preprocessorClass'];
 135                 } else {
 136                         $this->mPreprocessorClass = 'Preprocessor_DOM';
 137                 }
 138                 $this->mMarkerIndex = 0;
 139                 $this->mFirstCall = true;
 140         }
 141
 142         /**
 143          * Do various kinds of initialisation on the first call of the parser
 144          */
 145         function firstCallInit() {
 146                 if ( !$this->mFirstCall ) {
 147                         return;
 148                 }
 149                 $this->mFirstCall = false;
 150
 151                 wfProfileIn( __METHOD__ );
 152
 153                 $this->setHook( 'pre', array( $this, 'renderPreTag' ) );
 154                 CoreParserFunctions::register( $this );
 155                 $this->initialiseVariables();
 156
 157                 wfRunHooks( 'ParserFirstCallInit', array( &$this ) );
 158                 wfProfileOut( __METHOD__ );
 159         }
 160
 161         /**
 162          * Clear Parser state
 163          *
 164          * @private
 165          */
 166         function clearState() {
 167                 wfProfileIn( __METHOD__ );
 168                 if ( $this->mFirstCall ) {
 169                         $this->firstCallInit();
 170                 }
 171                 $this->mOutput = new ParserOutput;
 172                 $this->mAutonumber = 0;
 173                 $this->mLastSection = '';
 174                 $this->mDTopen = false;
 175                 $this->mIncludeCount = array();
 176                 $this->mStripState = new StripState;
 177                 $this->mArgStack = false;
 178                 $this->mInPre = false;
 179                 $this->mInterwikiLinkHolders = array(
 180                         'texts' => array(),
 181                         'titles' => array()
 182                 );
 183                 $this->mLinkHolders = array(
 184                         'namespaces' => array(),
 185                         'dbkeys' => array(),
 186                         'queries' => array(),
 187                         'texts' => array(),
 188                         'titles' => array()
 189                 );
 190                 $this->mRevisionTimestamp = $this->mRevisionId = null;
 191
 192                 /**
 193                  * Prefix for temporary replacement strings for the multipass parser.
 194                  * \x07 should never appear in input as it's disallowed in XML.
 195                  * Using it at the front also gives us a little extra robustness
 196                  * since it shouldn't match when butted up against identifier-like
 197                  * string constructs.
 198                  *
 199                  * Must not consist of all title characters, or else it will change
 200                  * the behaviour of <nowiki> in a link.
 201                  */
 202                 #$this->mUniqPrefix = "\x07UNIQ" . Parser::getRandomString();
 203                 # Changed to \x7f to allow XML double-parsing -- TS
 204                 $this->mUniqPrefix = "\x7fUNIQ" . Parser::getRandomString();
 205
 206
 207                 # Clear these on every parse, bug 4549
 208                 $this->mTplExpandCache = $this->mTplRedirCache = $this->mTplDomCache = array();
 209
 210                 $this->mShowToc = true;
 211                 $this->mForceTocPosition = false;
 212                 $this->mIncludeSizes = array(
 213                         'post-expand' => 0,
 214                         'arg' => 0,
 215                 );
 216                 $this->mPPNodeCount = 0;
 217                 $this->mDefaultSort = false;
 218                 $this->mHeadings = array();
 219                 $this->mDoubleUnderscores = array();
 220
 221                 # Fix cloning
 222                 if ( isset( $this->mPreprocessor ) && $this->mPreprocessor->parser !== $this ) {
 223                         $this->mPreprocessor = null;
 224                 }
 225
 226                 wfRunHooks( 'ParserClearState', array( &$this ) );
 227                 wfProfileOut( __METHOD__ );
 228         }
 229
 230         function setOutputType( $ot ) {
 231                 $this->mOutputType = $ot;
 232                 // Shortcut alias
 233                 $this->ot = array(
 234                         'html' => $ot == self::OT_HTML,
 235                         'wiki' => $ot == self::OT_WIKI,
 236                         'pre' => $ot == self::OT_PREPROCESS,
 237                 );
 238         }
 239
 240         /**
 241          * Set the context title
 242          */
 243         function setTitle( $t ) {
 244                 if ( !$t || $t instanceof FakeTitle ) {
 245                         $t = Title::newFromText( 'NO TITLE' );
 246                 }
 247                 if ( strval( $t->getFragment() ) !== '' ) {
 248                         # Strip the fragment to avoid various odd effects
 249                         $this->mTitle = clone $t;
 250                         $this->mTitle->setFragment( '' );
 251                 } else {
 252                         $this->mTitle = $t;
 253                 }
 254         }
 255
 256         /**
 257          * Accessor for mUniqPrefix.
 258          *
 259          * @public
 260          */
 261         function uniqPrefix() {
 262                 if( !isset( $this->mUniqPrefix ) ) {
 263                         // @fixme this is probably *horribly wrong*
 264                         // LanguageConverter seems to want $wgParser's uniqPrefix, however
 265                         // if this is called for a parser cache hit, the parser may not
 266                         // have ever been initialized in the first place.
 267                         // Not really sure what the heck is supposed to be going on here.
 268                         return '';
 269                         //throw new MWException( "Accessing uninitialized mUniqPrefix" );
 270                 }
 271                 return $this->mUniqPrefix;
 272         }
 273
 274         /**
 275          * Convert wikitext to HTML
 276          * Do not call this function recursively.
 277          *
 278          * @param string $text Text we want to parse
 279          * @param Title &$title A title object
 280          * @param array $options
 281          * @param boolean $linestart
 282          * @param boolean $clearState
 283          * @param int $revid number to pass in {{REVISIONID}}
 284          * @return ParserOutput a ParserOutput
 285          */
 286         public function parse( $text, &$title, $options, $linestart = true, $clearState = true, $revid = null ) {
 287                 /**
 288                  * First pass--just handle <nowiki> sections, pass the rest off
 289                  * to internalParse() which does all the real work.
 290                  */
 291
 292                 global $wgUseTidy, $wgAlwaysUseTidy, $wgContLang;
 293                 $fname = 'Parser::parse-' . wfGetCaller();
 294                 wfProfileIn( __METHOD__ );
 295                 wfProfileIn( $fname );
 296
 297                 if ( $clearState ) {
 298                         $this->clearState();
 299                 }
 300
 301                 $this->mOptions = $options;
 302                 $this->setTitle( $title );
 303                 $oldRevisionId = $this->mRevisionId;
 304                 $oldRevisionTimestamp = $this->mRevisionTimestamp;
 305                 if( $revid !== null ) {
 306                         $this->mRevisionId = $revid;
 307                         $this->mRevisionTimestamp = null;
 308                 }
 309                 $this->setOutputType( self::OT_HTML );
 310                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$this->mStripState ) );
 311                 # No more strip!
 312                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$this->mStripState ) );
 313                 $text = $this->internalParse( $text );
 314                 $text = $this->mStripState->unstripGeneral( $text );
 315
 316                 # Clean up special characters, only run once, next-to-last before doBlockLevels
 317                 $fixtags = array(
 318                         # french spaces, last one Guillemet-left
 319                         # only if there is something before the space
 320                         '/(.) (?=\\?|:|;|!|%|\\302\\273)/' => '\\1&nbsp;\\2',
 321                         # french spaces, Guillemet-right
 322                         '/(\\302\\253) /' => '\\1&nbsp;',
 323                         '/&nbsp;(!\s*important)/' => ' \\1', #Beware of CSS magic word !important, bug #11874.
 324                 );
 325                 $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 326
 327                 # only once and last
 328                 $text = $this->doBlockLevels( $text, $linestart );
 329
 330                 $this->replaceLinkHolders( $text );
 331
 332                 # the position of the parserConvert() call should not be changed. it
 333                 # assumes that the links are all replaced and the only thing left
 334                 # is the <nowiki> mark.
 335                 # Side-effects: this calls $this->mOutput->setTitleText()
 336                 $text = $wgContLang->parserConvert( $text, $this );
 337
 338                 $text = $this->mStripState->unstripNoWiki( $text );
 339
 340                 wfRunHooks( 'ParserBeforeTidy', array( &$this, &$text ) );
 341
 342 //!JF Move to its own function
 343
 344                 $uniq_prefix = $this->mUniqPrefix;
 345                 $matches = array();
 346                 $elements = array_keys( $this->mTransparentTagHooks );
 347                 $text = Parser::extractTagsAndParams( $elements, $text, $matches, $uniq_prefix );
 348
 349                 foreach( $matches as $marker => $data ) {
 350                         list( $element, $content, $params, $tag ) = $data;
 351                         $tagName = strtolower( $element );
 352                         if( isset( $this->mTransparentTagHooks[$tagName] ) ) {
 353                                 $output = call_user_func_array( $this->mTransparentTagHooks[$tagName],
 354                                         array( $content, $params, $this ) );
 355                         } else {
 356                                 $output = $tag;
 357                         }
 358                         $this->mStripState->general->setPair( $marker, $output );
 359                 }
 360                 $text = $this->mStripState->unstripGeneral( $text );
 361
 362                 $text = Sanitizer::normalizeCharReferences( $text );
 363
 364                 if (($wgUseTidy and $this->mOptions->mTidy) or $wgAlwaysUseTidy) {
 365                         $text = Parser::tidy($text);
 366                 } else {
 367                         # attempt to sanitize at least some nesting problems
 368                         # (bug #2702 and quite a few others)
 369                         $tidyregs = array(
 370                                 # ''Something [http://www.cool.com cool''] -->
 371                                 # <i>Something</i><a href="http://www.cool.com"..><i>cool></i></a>
 372                                 '/(<([bi])>)(<([bi])>)?([^<]*)(<\/?a[^<]*>)([^<]*)(<\/\\4>)?(<\/\\2>)/' =>
 373                                 '\\1\\3\\5\\8\\9\\6\\1\\3\\7\\8\\9',
 374                                 # fix up an anchor inside another anchor, only
 375                                 # at least for a single single nested link (bug 3695)
 376                                 '/(<a[^>]+>)([^<]*)(<a[^>]+>[^<]*)<\/a>(.*)<\/a>/' =>
 377                                 '\\1\\2</a>\\3</a>\\1\\4</a>',
 378                                 # fix div inside inline elements- doBlockLevels won't wrap a line which
 379                                 # contains a div, so fix it up here; replace
 380                                 # div with escaped text
 381                                 '/(<([aib]) [^>]+>)([^<]*)(<div([^>]*)>)(.*)(<\/div>)([^<]*)(<\/\\2>)/' =>
 382                                 '\\1\\3&lt;div\\5&gt;\\6&lt;/div&gt;\\8\\9',
 383                                 # remove empty italic or bold tag pairs, some
 384                                 # introduced by rules above
 385                                 '/<([bi])><\/\\1>/' => '',
 386                         );
 387
 388                         $text = preg_replace(
 389                                 array_keys( $tidyregs ),
 390                                 array_values( $tidyregs ),
 391                                 $text );
 392                 }
 393
 394                 wfRunHooks( 'ParserAfterTidy', array( &$this, &$text ) );
 395
 396                 # Information on include size limits, for the benefit of users who try to skirt them
 397                 if ( $this->mOptions->getEnableLimitReport() ) {
 398                         $max = $this->mOptions->getMaxIncludeSize();
 399                         $limitReport =
 400                                 "NewPP limit report\n" .
 401                                 "Preprocessor node count: {$this->mPPNodeCount}/{$this->mOptions->mMaxPPNodeCount}\n" .
 402                                 "Post-expand include size: {$this->mIncludeSizes['post-expand']}/$max bytes\n" .
 403                                 "Template argument size: {$this->mIncludeSizes['arg']}/$max bytes\n";
 404                         wfRunHooks( 'ParserLimitReport', array( $this, &$limitReport ) );
 405                         $text .= "\n<!-- \n$limitReport-->\n";
 406                 }
 407                 $this->mOutput->setText( $text );
 408                 $this->mRevisionId = $oldRevisionId;
 409                 $this->mRevisionTimestamp = $oldRevisionTimestamp;
 410                 wfProfileOut( $fname );
 411                 wfProfileOut( __METHOD__ );
 412
 413                 return $this->mOutput;
 414         }
 415
 416         /**
 417          * Recursive parser entry point that can be called from an extension tag
 418          * hook.
 419          */
 420         function recursiveTagParse( $text ) {
 421                 wfProfileIn( __METHOD__ );
 422                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$this->mStripState ) );
 423                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$this->mStripState ) );
 424                 $text = $this->internalParse( $text );
 425                 wfProfileOut( __METHOD__ );
 426                 return $text;
 427         }
 428
 429         /**
 430          * Expand templates and variables in the text, producing valid, static wikitext.
 431          * Also removes comments.
 432          */
 433         function preprocess( $text, $title, $options, $revid = null ) {
 434                 wfProfileIn( __METHOD__ );
 435                 $this->clearState();
 436                 $this->setOutputType( self::OT_PREPROCESS );
 437                 $this->mOptions = $options;
 438                 $this->setTitle( $title );
 439                 if( $revid !== null ) {
 440                         $this->mRevisionId = $revid;
 441                 }
 442                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$this->mStripState ) );
 443                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$this->mStripState ) );
 444                 $text = $this->replaceVariables( $text );
 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
 466                 $target = $this->mOptions->getTargetLanguage();
 467                 if ( $target !== null ) {
 468                         return $target;
 469                 } else {
 470                         return $this->mOptions->getInterfaceMessage() ? $wgLang : $wgContLang;
 471                 }
 472         }
 473
 474         /**
 475          * Get a preprocessor object
 476          */
 477         function getPreprocessor() {
 478                 if ( !isset( $this->mPreprocessor ) ) {
 479                         $class = $this->mPreprocessorClass;
 480                         $this->mPreprocessor = new $class( $this );
 481                 }
 482                 return $this->mPreprocessor;
 483         }
 484
 485         /**
 486          * Replaces all occurrences of HTML-style comments and the given tags
 487          * in the text with a random marker and returns the next text. The output
 488          * parameter $matches will be an associative array filled with data in
 489          * the form:
 490          *   'UNIQ-xxxxx' => array(
 491          *     'element',
 492          *     'tag content',
 493          *     array( 'param' => 'x' ),
 494          *     '<element param="x">tag content</element>' ) )
 495          *
 496          * @param $elements list of element names. Comments are always extracted.
 497          * @param $text Source text string.
 498          * @param $uniq_prefix
 499          *
 500          * @public
 501          * @static
 502          */
 503         function extractTagsAndParams($elements, $text, &$matches, $uniq_prefix = ''){
 504                 static $n = 1;
 505                 $stripped = '';
 506                 $matches = array();
 507
 508                 $taglist = implode( '|', $elements );
 509                 $start = "/<($taglist)(\\s+[^>]*?|\\s*?)(\/?>)|<(!--)/i";
 510
 511                 while ( '' != $text ) {
 512                         $p = preg_split( $start, $text, 2, PREG_SPLIT_DELIM_CAPTURE );
 513                         $stripped .= $p[0];
 514                         if( count( $p ) < 5 ) {
 515                                 break;
 516                         }
 517                         if( count( $p ) > 5 ) {
 518                                 // comment
 519                                 $element    = $p[4];
 520                                 $attributes = '';
 521                                 $close      = '';
 522                                 $inside     = $p[5];
 523                         } else {
 524                                 // tag
 525                                 $element    = $p[1];
 526                                 $attributes = $p[2];
 527                                 $close      = $p[3];
 528                                 $inside     = $p[4];
 529                         }
 530
 531                         $marker = "$uniq_prefix-$element-" . sprintf('%08X', $n++) . self::MARKER_SUFFIX;
 532                         $stripped .= $marker;
 533
 534                         if ( $close === '/>' ) {
 535                                 // Empty element tag, <tag />
 536                                 $content = null;
 537                                 $text = $inside;
 538                                 $tail = null;
 539                         } else {
 540                                 if( $element == '!--' ) {
 541                                         $end = '/(-->)/';
 542                                 } else {
 543                                         $end = "/(<\\/$element\\s*>)/i";
 544                                 }
 545                                 $q = preg_split( $end, $inside, 2, PREG_SPLIT_DELIM_CAPTURE );
 546                                 $content = $q[0];
 547                                 if( count( $q ) < 3 ) {
 548                                         # No end tag -- let it run out to the end of the text.
 549                                         $tail = '';
 550                                         $text = '';
 551                                 } else {
 552                                         $tail = $q[1];
 553                                         $text = $q[2];
 554                                 }
 555                         }
 556
 557                         $matches[$marker] = array( $element,
 558                                 $content,
 559                                 Sanitizer::decodeTagAttributes( $attributes ),
 560                                 "<$element$attributes$close$content$tail" );
 561                 }
 562                 return $stripped;
 563         }
 564
 565         /**
 566          * Get a list of strippable XML-like elements
 567          */
 568         function getStripList() {
 569                 global $wgRawHtml;
 570                 $elements = $this->mStripList;
 571                 if( $wgRawHtml ) {
 572                         $elements[] = 'html';
 573                 }
 574                 if( $this->mOptions->getUseTeX() ) {
 575                         $elements[] = 'math';
 576                 }
 577                 return $elements;
 578         }
 579
 580         /**
 581          * @deprecated use replaceVariables
 582          */
 583         function strip( $text, $state, $stripcomments = false , $dontstrip = array () ) {
 584                 return $text;
 585         }
 586
 587         /**
 588          * Restores pre, math, and other extensions removed by strip()
 589          *
 590          * always call unstripNoWiki() after this one
 591          * @private
 592          * @deprecated use $this->mStripState->unstrip()
 593          */
 594         function unstrip( $text, $state ) {
 595                 return $state->unstripGeneral( $text );
 596         }
 597
 598         /**
 599          * Always call this after unstrip() to preserve the order
 600          *
 601          * @private
 602          * @deprecated use $this->mStripState->unstrip()
 603          */
 604         function unstripNoWiki( $text, $state ) {
 605                 return $state->unstripNoWiki( $text );
 606         }
 607
 608         /**
 609          * @deprecated use $this->mStripState->unstripBoth()
 610          */
 611         function unstripForHTML( $text ) {
 612                 return $this->mStripState->unstripBoth( $text );
 613         }
 614
 615         /**
 616          * Add an item to the strip state
 617          * Returns the unique tag which must be inserted into the stripped text
 618          * The tag will be replaced with the original text in unstrip()
 619          *
 620          * @private
 621          */
 622         function insertStripItem( $text ) {
 623                 $rnd = "{$this->mUniqPrefix}-item-{$this->mMarkerIndex}-" . self::MARKER_SUFFIX;
 624                 $this->mMarkerIndex++;
 625                 $this->mStripState->general->setPair( $rnd, $text );
 626                 return $rnd;
 627         }
 628
 629         /**
 630          * Interface with html tidy, used if $wgUseTidy = true.
 631          * If tidy isn't able to correct the markup, the original will be
 632          * returned in all its glory with a warning comment appended.
 633          *
 634          * Either the external tidy program or the in-process tidy extension
 635          * will be used depending on availability. Override the default
 636          * $wgTidyInternal setting to disable the internal if it's not working.
 637          *
 638          * @param string $text Hideous HTML input
 639          * @return string Corrected HTML output
 640          * @public
 641          * @static
 642          */
 643         function tidy( $text ) {
 644                 global $wgTidyInternal;
 645                 $wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"'.
 646 ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>'.
 647 '<head><title>test</title></head><body>'.$text.'</body></html>';
 648                 if( $wgTidyInternal ) {
 649                         $correctedtext = Parser::internalTidy( $wrappedtext );
 650                 } else {
 651                         $correctedtext = Parser::externalTidy( $wrappedtext );
 652                 }
 653                 if( is_null( $correctedtext ) ) {
 654                         wfDebug( "Tidy error detected!\n" );
 655                         return $text . "\n<!-- Tidy found serious XHTML errors -->\n";
 656                 }
 657                 return $correctedtext;
 658         }
 659
 660         /**
 661          * Spawn an external HTML tidy process and get corrected markup back from it.
 662          *
 663          * @private
 664          * @static
 665          */
 666         function externalTidy( $text ) {
 667                 global $wgTidyConf, $wgTidyBin, $wgTidyOpts;
 668                 $fname = 'Parser::externalTidy';
 669                 wfProfileIn( $fname );
 670
 671                 $cleansource = '';
 672                 $opts = ' -utf8';
 673
 674                 $descriptorspec = array(
 675                         0 => array('pipe', 'r'),
 676                         1 => array('pipe', 'w'),
 677                         2 => array('file', wfGetNull(), 'a')
 678                 );
 679                 $pipes = array();
 680                 $process = proc_open("$wgTidyBin -config $wgTidyConf $wgTidyOpts$opts", $descriptorspec, $pipes);
 681                 if (is_resource($process)) {
 682                         // Theoretically, this style of communication could cause a deadlock
 683                         // here. If the stdout buffer fills up, then writes to stdin could
 684                         // block. This doesn't appear to happen with tidy, because tidy only
 685                         // writes to stdout after it's finished reading from stdin. Search
 686                         // for tidyParseStdin and tidySaveStdout in console/tidy.c
 687                         fwrite($pipes[0], $text);
 688                         fclose($pipes[0]);
 689                         while (!feof($pipes[1])) {
 690                                 $cleansource .= fgets($pipes[1], 1024);
 691                         }
 692                         fclose($pipes[1]);
 693                         proc_close($process);
 694                 }
 695
 696                 wfProfileOut( $fname );
 697
 698                 if( $cleansource == '' && $text != '') {
 699                         // Some kind of error happened, so we couldn't get the corrected text.
 700                         // Just give up; we'll use the source text and append a warning.
 701                         return null;
 702                 } else {
 703                         return $cleansource;
 704                 }
 705         }
 706
 707         /**
 708          * Use the HTML tidy PECL extension to use the tidy library in-process,
 709          * saving the overhead of spawning a new process.
 710          *
 711          * 'pear install tidy' should be able to compile the extension module.
 712          *
 713          * @private
 714          * @static
 715          */
 716         function internalTidy( $text ) {
 717                 global $wgTidyConf, $IP, $wgDebugTidy;
 718                 $fname = 'Parser::internalTidy';
 719                 wfProfileIn( $fname );
 720
 721                 $tidy = new tidy;
 722                 $tidy->parseString( $text, $wgTidyConf, 'utf8' );
 723                 $tidy->cleanRepair();
 724                 if( $tidy->getStatus() == 2 ) {
 725                         // 2 is magic number for fatal error
 726                         // http://www.php.net/manual/en/function.tidy-get-status.php
 727                         $cleansource = null;
 728                 } else {
 729                         $cleansource = tidy_get_output( $tidy );
 730                 }
 731                 if ( $wgDebugTidy && $tidy->getStatus() > 0 ) {
 732                         $cleansource .= "<!--\nTidy reports:\n" .
 733                                 str_replace( '-->', '--&gt;', $tidy->errorBuffer ) .
 734                                 "\n-->";
 735                 }
 736
 737                 wfProfileOut( $fname );
 738                 return $cleansource;
 739         }
 740
 741         /**
 742          * parse the wiki syntax used to render tables
 743          *
 744          * @private
 745          */
 746         function doTableStuff ( $text ) {
 747                 $fname = 'Parser::doTableStuff';
 748                 wfProfileIn( $fname );
 749
 750                 $lines = explode ( "\n" , $text );
 751                 $td_history = array (); // Is currently a td tag open?
 752                 $last_tag_history = array (); // Save history of last lag activated (td, th or caption)
 753                 $tr_history = array (); // Is currently a tr tag open?
 754                 $tr_attributes = array (); // history of tr attributes
 755                 $has_opened_tr = array(); // Did this table open a <tr> element?
 756                 $indent_level = 0; // indent level of the table
 757                 foreach ( $lines as $key => $line )
 758                 {
 759                         $line = trim ( $line );
 760
 761                         if( $line == '' ) { // empty line, go to next line
 762                                 continue;
 763                         }
 764                         $first_character = $line{0};
 765                         $matches = array();
 766
 767                         if ( preg_match( '/^(:*)\{\|(.*)$/' , $line , $matches ) ) {
 768                                 // First check if we are starting a new table
 769                                 $indent_level = strlen( $matches[1] );
 770
 771                                 $attributes = $this->mStripState->unstripBoth( $matches[2] );
 772                                 $attributes = Sanitizer::fixTagAttributes ( $attributes , 'table' );
 773
 774                                 $lines[$key] = str_repeat( '<dl><dd>' , $indent_level ) . "<table{$attributes}>";
 775                                 array_push ( $td_history , false );
 776                                 array_push ( $last_tag_history , '' );
 777                                 array_push ( $tr_history , false );
 778                                 array_push ( $tr_attributes , '' );
 779                                 array_push ( $has_opened_tr , false );
 780                         } else if ( count ( $td_history ) == 0 ) {
 781                                 // Don't do any of the following
 782                                 continue;
 783                         } else if ( substr ( $line , 0 , 2 ) == '|}' ) {
 784                                 // We are ending a table
 785                                 $line = '</table>' . substr ( $line , 2 );
 786                                 $last_tag = array_pop ( $last_tag_history );
 787
 788                                 if ( !array_pop ( $has_opened_tr ) ) {
 789                                         $line = "<tr><td></td></tr>{$line}";
 790                                 }
 791
 792                                 if ( array_pop ( $tr_history ) ) {
 793                                         $line = "</tr>{$line}";
 794                                 }
 795
 796                                 if ( array_pop ( $td_history ) ) {
 797                                         $line = "</{$last_tag}>{$line}";
 798                                 }
 799                                 array_pop ( $tr_attributes );
 800                                 $lines[$key] = $line . str_repeat( '</dd></dl>' , $indent_level );
 801                         } else if ( substr ( $line , 0 , 2 ) == '|-' ) {
 802                                 // Now we have a table row
 803                                 $line = preg_replace( '#^\|-+#', '', $line );
 804
 805                                 // Whats after the tag is now only attributes
 806                                 $attributes = $this->mStripState->unstripBoth( $line );
 807                                 $attributes = Sanitizer::fixTagAttributes ( $attributes , 'tr' );
 808                                 array_pop ( $tr_attributes );
 809                                 array_push ( $tr_attributes , $attributes );
 810
 811                                 $line = '';
 812                                 $last_tag = array_pop ( $last_tag_history );
 813                                 array_pop ( $has_opened_tr );
 814                                 array_push ( $has_opened_tr , true );
 815
 816                                 if ( array_pop ( $tr_history ) ) {
 817                                         $line = '</tr>';
 818                                 }
 819
 820                                 if ( array_pop ( $td_history ) ) {
 821                                         $line = "</{$last_tag}>{$line}";
 822                                 }
 823
 824                                 $lines[$key] = $line;
 825                                 array_push ( $tr_history , false );
 826                                 array_push ( $td_history , false );
 827                                 array_push ( $last_tag_history , '' );
 828                         }
 829                         else if ( $first_character == '|' || $first_character == '!' || substr ( $line , 0 , 2 )  == '|+' ) {
 830                                 // This might be cell elements, td, th or captions
 831                                 if ( substr ( $line , 0 , 2 ) == '|+' ) {
 832                                         $first_character = '+';
 833                                         $line = substr ( $line , 1 );
 834                                 }
 835
 836                                 $line = substr ( $line , 1 );
 837
 838                                 if ( $first_character == '!' ) {
 839                                         $line = str_replace ( '!!' , '||' , $line );
 840                                 }
 841
 842                                 // Split up multiple cells on the same line.
 843                                 // FIXME : This can result in improper nesting of tags processed
 844                                 // by earlier parser steps, but should avoid splitting up eg
 845                                 // attribute values containing literal "||".
 846                                 $cells = StringUtils::explodeMarkup( '||' , $line );
 847
 848                                 $lines[$key] = '';
 849
 850                                 // Loop through each table cell
 851                                 foreach ( $cells as $cell )
 852                                 {
 853                                         $previous = '';
 854                                         if ( $first_character != '+' )
 855                                         {
 856                                                 $tr_after = array_pop ( $tr_attributes );
 857                                                 if ( !array_pop ( $tr_history ) ) {
 858                                                         $previous = "<tr{$tr_after}>\n";
 859                                                 }
 860                                                 array_push ( $tr_history , true );
 861                                                 array_push ( $tr_attributes , '' );
 862                                                 array_pop ( $has_opened_tr );
 863                                                 array_push ( $has_opened_tr , true );
 864                                         }
 865
 866                                         $last_tag = array_pop ( $last_tag_history );
 867
 868                                         if ( array_pop ( $td_history ) ) {
 869                                                 $previous = "</{$last_tag}>{$previous}";
 870                                         }
 871
 872                                         if ( $first_character == '|' ) {
 873                                                 $last_tag = 'td';
 874                                         } else if ( $first_character == '!' ) {
 875                                                 $last_tag = 'th';
 876                                         } else if ( $first_character == '+' ) {
 877                                                 $last_tag = 'caption';
 878                                         } else {
 879                                                 $last_tag = '';
 880                                         }
 881
 882                                         array_push ( $last_tag_history , $last_tag );
 883
 884                                         // A cell could contain both parameters and data
 885                                         $cell_data = explode ( '|' , $cell , 2 );
 886
 887                                         // Bug 553: Note that a '|' inside an invalid link should not
 888                                         // be mistaken as delimiting cell parameters
 889                                         if ( strpos( $cell_data[0], '[[' ) !== false ) {
 890                                                 $cell = "{$previous}<{$last_tag}>{$cell}";
 891                                         } else if ( count ( $cell_data ) == 1 )
 892                                                 $cell = "{$previous}<{$last_tag}>{$cell_data[0]}";
 893                                         else {
 894                                                 $attributes = $this->mStripState->unstripBoth( $cell_data[0] );
 895                                                 $attributes = Sanitizer::fixTagAttributes( $attributes , $last_tag );
 896                                                 $cell = "{$previous}<{$last_tag}{$attributes}>{$cell_data[1]}";
 897                                         }
 898
 899                                         $lines[$key] .= $cell;
 900                                         array_push ( $td_history , true );
 901                                 }
 902                         }
 903                 }
 904
 905                 // Closing open td, tr && table
 906                 while ( count ( $td_history ) > 0 )
 907                 {
 908                         if ( array_pop ( $td_history ) ) {
 909                                 $lines[] = '</td>' ;
 910                         }
 911                         if ( array_pop ( $tr_history ) ) {
 912                                 $lines[] = '</tr>' ;
 913                         }
 914                         if ( !array_pop ( $has_opened_tr ) ) {
 915                                 $lines[] = "<tr><td></td></tr>" ;
 916                         }
 917
 918                         $lines[] = '</table>' ;
 919                 }
 920
 921                 $output = implode ( "\n" , $lines ) ;
 922
 923                 // special case: don't return empty table
 924                 if( $output == "<table>\n<tr><td></td></tr>\n</table>" ) {
 925                         $output = '';
 926                 }
 927
 928                 wfProfileOut( $fname );
 929
 930                 return $output;
 931         }
 932
 933         /**
 934          * Helper function for parse() that transforms wiki markup into
 935          * HTML. Only called for $mOutputType == self::OT_HTML.
 936          *
 937          * @private
 938          */
 939         function internalParse( $text ) {
 940                 $isMain = true;
 941                 $fname = 'Parser::internalParse';
 942                 wfProfileIn( $fname );
 943
 944                 # Hook to suspend the parser in this state
 945                 if ( !wfRunHooks( 'ParserBeforeInternalParse', array( &$this, &$text, &$this->mStripState ) ) ) {
 946                         wfProfileOut( $fname );
 947                         return $text ;
 948                 }
 949
 950                 $text = $this->replaceVariables( $text );
 951                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'attributeStripCallback' ), false, array_keys( $this->mTransparentTagHooks ) );
 952                 wfRunHooks( 'InternalParseBeforeLinks', array( &$this, &$text, &$this->mStripState ) );
 953
 954                 // Tables need to come after variable replacement for things to work
 955                 // properly; putting them before other transformations should keep
 956                 // exciting things like link expansions from showing up in surprising
 957                 // places.
 958                 $text = $this->doTableStuff( $text );
 959
 960                 $text = preg_replace( '/(^|\n)-----*/', '\\1<hr />', $text );
 961
 962                 $text = $this->doDoubleUnderscore( $text );
 963                 $text = $this->doHeadings( $text );
 964                 if($this->mOptions->getUseDynamicDates()) {
 965                         $df =& DateFormatter::getInstance();
 966                         $text = $df->reformat( $this->mOptions->getDateFormat(), $text );
 967                 }
 968                 $text = $this->doAllQuotes( $text );
 969                 $text = $this->replaceInternalLinks( $text );
 970                 $text = $this->replaceExternalLinks( $text );
 971
 972                 # replaceInternalLinks may sometimes leave behind
 973                 # absolute URLs, which have to be masked to hide them from replaceExternalLinks
 974                 $text = str_replace($this->mUniqPrefix."NOPARSE", "", $text);
 975
 976                 $text = $this->doMagicLinks( $text );
 977                 $text = $this->formatHeadings( $text, $isMain );
 978
 979                 wfProfileOut( $fname );
 980                 return $text;
 981         }
 982
 983         /**
 984          * Replace special strings like "ISBN xxx" and "RFC xxx" with
 985          * magic external links.
 986          *
 987          * @private
 988          */
 989         function doMagicLinks( $text ) {
 990                 wfProfileIn( __METHOD__ );
 991                 $text = preg_replace_callback(
 992                         '!(?:                           # Start cases
 993                             <a.*?</a> |                 # Skip link text
 994                             <.*?> |                     # Skip stuff inside HTML elements
 995                             (?:RFC|PMID)\s+([0-9]+) |   # RFC or PMID, capture number as m[1]
 996                             ISBN\s+(\b                  # ISBN, capture number as m[2]
 997                                      (?: 97[89] [\ \-]? )?   # optional 13-digit ISBN prefix
 998                                      (?: [0-9]  [\ \-]? ){9} # 9 digits with opt. delimiters
 999                                      [0-9Xx]                 # check digit
1000                                    \b)
1001                         )!x', array( &$this, 'magicLinkCallback' ), $text );
1002                 wfProfileOut( __METHOD__ );
1003                 return $text;
1004         }
1005
1006         function magicLinkCallback( $m ) {
1007                 if ( substr( $m[0], 0, 1 ) == '<' ) {
1008                         # Skip HTML element
1009                         return $m[0];
1010                 } elseif ( substr( $m[0], 0, 4 ) == 'ISBN' ) {
1011                         $isbn = $m[2];
1012                         $num = strtr( $isbn, array(
1013                                 '-' => '',
1014                                 ' ' => '',
1015                                 'x' => 'X',
1016                         ));
1017                         $titleObj = SpecialPage::getTitleFor( 'Booksources', $num );
1018                         $text = '<a href="' .
1019                                 $titleObj->escapeLocalUrl() .
1020                                 "\" class=\"internal\">ISBN $isbn</a>";
1021                 } else {
1022                         if ( substr( $m[0], 0, 3 ) == 'RFC' ) {
1023                                 $keyword = 'RFC';
1024                                 $urlmsg = 'rfcurl';
1025                                 $id = $m[1];
1026                         } elseif ( substr( $m[0], 0, 4 ) == 'PMID' ) {
1027                                 $keyword = 'PMID';
1028                                 $urlmsg = 'pubmedurl';
1029                                 $id = $m[1];
1030                         } else {
1031                                 throw new MWException( __METHOD__.': unrecognised match type "' .
1032                                         substr($m[0], 0, 20 ) . '"' );
1033                         }
1034
1035                         $url = wfMsg( $urlmsg, $id);
1036                         $sk = $this->mOptions->getSkin();
1037                         $la = $sk->getExternalLinkAttributes( $url, $keyword.$id );
1038                         $text = "<a href=\"{$url}\"{$la}>{$keyword} {$id}</a>";
1039                 }
1040                 return $text;
1041         }
1042
1043         /**
1044          * Parse headers and return html
1045          *
1046          * @private
1047          */
1048         function doHeadings( $text ) {
1049                 $fname = 'Parser::doHeadings';
1050                 wfProfileIn( $fname );
1051                 for ( $i = 6; $i >= 1; --$i ) {
1052                         $h = str_repeat( '=', $i );
1053                         $text = preg_replace( "/^$h(.+)$h\\s*$/m",
1054                           "<h$i>\\1</h$i>", $text );
1055                 }
1056                 wfProfileOut( $fname );
1057                 return $text;
1058         }
1059
1060         /**
1061          * Replace single quotes with HTML markup
1062          * @private
1063          * @return string the altered text
1064          */
1065         function doAllQuotes( $text ) {
1066                 $fname = 'Parser::doAllQuotes';
1067                 wfProfileIn( $fname );
1068                 $outtext = '';
1069                 $lines = explode( "\n", $text );
1070                 foreach ( $lines as $line ) {
1071                         $outtext .= $this->doQuotes ( $line ) . "\n";
1072                 }
1073                 $outtext = substr($outtext, 0,-1);
1074                 wfProfileOut( $fname );
1075                 return $outtext;
1076         }
1077
1078         /**
1079          * Helper function for doAllQuotes()
1080          */
1081         public function doQuotes( $text ) {
1082                 $arr = preg_split( "/(''+)/", $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1083                 if ( count( $arr ) == 1 )
1084                         return $text;
1085                 else
1086                 {
1087                         # First, do some preliminary work. This may shift some apostrophes from
1088                         # being mark-up to being text. It also counts the number of occurrences
1089                         # of bold and italics mark-ups.
1090                         $i = 0;
1091                         $numbold = 0;
1092                         $numitalics = 0;
1093                         foreach ( $arr as $r )
1094                         {
1095                                 if ( ( $i % 2 ) == 1 )
1096                                 {
1097                                         # If there are ever four apostrophes, assume the first is supposed to
1098                                         # be text, and the remaining three constitute mark-up for bold text.
1099                                         if ( strlen( $arr[$i] ) == 4 )
1100                                         {
1101                                                 $arr[$i-1] .= "'";
1102                                                 $arr[$i] = "'''";
1103                                         }
1104                                         # If there are more than 5 apostrophes in a row, assume they're all
1105                                         # text except for the last 5.
1106                                         else if ( strlen( $arr[$i] ) > 5 )
1107                                         {
1108                                                 $arr[$i-1] .= str_repeat( "'", strlen( $arr[$i] ) - 5 );
1109                                                 $arr[$i] = "'''''";
1110                                         }
1111                                         # Count the number of occurrences of bold and italics mark-ups.
1112                                         # We are not counting sequences of five apostrophes.
1113                                         if ( strlen( $arr[$i] ) == 2 )      { $numitalics++;             }
1114                                         else if ( strlen( $arr[$i] ) == 3 ) { $numbold++;                }
1115                                         else if ( strlen( $arr[$i] ) == 5 ) { $numitalics++; $numbold++; }
1116                                 }
1117                                 $i++;
1118                         }
1119
1120                         # If there is an odd number of both bold and italics, it is likely
1121                         # that one of the bold ones was meant to be an apostrophe followed
1122                         # by italics. Which one we cannot know for certain, but it is more
1123                         # likely to be one that has a single-letter word before it.
1124                         if ( ( $numbold % 2 == 1 ) && ( $numitalics % 2 == 1 ) )
1125                         {
1126                                 $i = 0;
1127                                 $firstsingleletterword = -1;
1128                                 $firstmultiletterword = -1;
1129                                 $firstspace = -1;
1130                                 foreach ( $arr as $r )
1131                                 {
1132                                         if ( ( $i % 2 == 1 ) and ( strlen( $r ) == 3 ) )
1133                                         {
1134                                                 $x1 = substr ($arr[$i-1], -1);
1135                                                 $x2 = substr ($arr[$i-1], -2, 1);
1136                                                 if ($x1 == ' ') {
1137                                                         if ($firstspace == -1) $firstspace = $i;
1138                                                 } else if ($x2 == ' ') {
1139                                                         if ($firstsingleletterword == -1) $firstsingleletterword = $i;
1140                                                 } else {
1141                                                         if ($firstmultiletterword == -1) $firstmultiletterword = $i;
1142                                                 }
1143                                         }
1144                                         $i++;
1145                                 }
1146
1147                                 # If there is a single-letter word, use it!
1148                                 if ($firstsingleletterword > -1)
1149                                 {
1150                                         $arr [ $firstsingleletterword ] = "''";
1151                                         $arr [ $firstsingleletterword-1 ] .= "'";
1152                                 }
1153                                 # If not, but there's a multi-letter word, use that one.
1154                                 else if ($firstmultiletterword > -1)
1155                                 {
1156                                         $arr [ $firstmultiletterword ] = "''";
1157                                         $arr [ $firstmultiletterword-1 ] .= "'";
1158                                 }
1159                                 # ... otherwise use the first one that has neither.
1160                                 # (notice that it is possible for all three to be -1 if, for example,
1161                                 # there is only one pentuple-apostrophe in the line)
1162                                 else if ($firstspace > -1)
1163                                 {
1164                                         $arr [ $firstspace ] = "''";
1165                                         $arr [ $firstspace-1 ] .= "'";
1166                                 }
1167                         }
1168
1169                         # Now let's actually convert our apostrophic mush to HTML!
1170                         $output = '';
1171                         $buffer = '';
1172                         $state = '';
1173                         $i = 0;
1174                         foreach ($arr as $r)
1175                         {
1176                                 if (($i % 2) == 0)
1177                                 {
1178                                         if ($state == 'both')
1179                                                 $buffer .= $r;
1180                                         else
1181                                                 $output .= $r;
1182                                 }
1183                                 else
1184                                 {
1185                                         if (strlen ($r) == 2)
1186                                         {
1187                                                 if ($state == 'i')
1188                                                 { $output .= '</i>'; $state = ''; }
1189                                                 else if ($state == 'bi')
1190                                                 { $output .= '</i>'; $state = 'b'; }
1191                                                 else if ($state == 'ib')
1192                                                 { $output .= '</b></i><b>'; $state = 'b'; }
1193                                                 else if ($state == 'both')
1194                                                 { $output .= '<b><i>'.$buffer.'</i>'; $state = 'b'; }
1195                                                 else # $state can be 'b' or ''
1196                                                 { $output .= '<i>'; $state .= 'i'; }
1197                                         }
1198                                         else if (strlen ($r) == 3)
1199                                         {
1200                                                 if ($state == 'b')
1201                                                 { $output .= '</b>'; $state = ''; }
1202                                                 else if ($state == 'bi')
1203                                                 { $output .= '</i></b><i>'; $state = 'i'; }
1204                                                 else if ($state == 'ib')
1205                                                 { $output .= '</b>'; $state = 'i'; }
1206                                                 else if ($state == 'both')
1207                                                 { $output .= '<i><b>'.$buffer.'</b>'; $state = 'i'; }
1208                                                 else # $state can be 'i' or ''
1209                                                 { $output .= '<b>'; $state .= 'b'; }
1210                                         }
1211                                         else if (strlen ($r) == 5)
1212                                         {
1213                                                 if ($state == 'b')
1214                                                 { $output .= '</b><i>'; $state = 'i'; }
1215                                                 else if ($state == 'i')
1216                                                 { $output .= '</i><b>'; $state = 'b'; }
1217                                                 else if ($state == 'bi')
1218                                                 { $output .= '</i></b>'; $state = ''; }
1219                                                 else if ($state == 'ib')
1220                                                 { $output .= '</b></i>'; $state = ''; }
1221                                                 else if ($state == 'both')
1222                                                 { $output .= '<i><b>'.$buffer.'</b></i>'; $state = ''; }
1223                                                 else # ($state == '')
1224                                                 { $buffer = ''; $state = 'both'; }
1225                                         }
1226                                 }
1227                                 $i++;
1228                         }
1229                         # Now close all remaining tags.  Notice that the order is important.
1230                         if ($state == 'b' || $state == 'ib')
1231                                 $output .= '</b>';
1232                         if ($state == 'i' || $state == 'bi' || $state == 'ib')
1233                                 $output .= '</i>';
1234                         if ($state == 'bi')
1235                                 $output .= '</b>';
1236                         # There might be lonely ''''', so make sure we have a buffer
1237                         if ($state == 'both' && $buffer)
1238                                 $output .= '<b><i>'.$buffer.'</i></b>';
1239                         return $output;
1240                 }
1241         }
1242
1243         /**
1244          * Replace external links
1245          *
1246          * Note: this is all very hackish and the order of execution matters a lot.
1247          * Make sure to run maintenance/parserTests.php if you change this code.
1248          *
1249          * @private
1250          */
1251         function replaceExternalLinks( $text ) {
1252                 global $wgContLang;
1253                 $fname = 'Parser::replaceExternalLinks';
1254                 wfProfileIn( $fname );
1255
1256                 $sk = $this->mOptions->getSkin();
1257
1258                 $bits = preg_split( $this->mExtLinkBracketedRegex, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1259
1260                 $s = $this->replaceFreeExternalLinks( array_shift( $bits ) );
1261
1262                 $i = 0;
1263                 while ( $i<count( $bits ) ) {
1264                         $url = $bits[$i++];
1265                         $protocol = $bits[$i++];
1266                         $text = $bits[$i++];
1267                         $trail = $bits[$i++];
1268
1269                         # The characters '<' and '>' (which were escaped by
1270                         # removeHTMLtags()) should not be included in
1271                         # URLs, per RFC 2396.
1272                         $m2 = array();
1273                         if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1274                                 $text = substr($url, $m2[0][1]) . ' ' . $text;
1275                                 $url = substr($url, 0, $m2[0][1]);
1276                         }
1277
1278                         # If the link text is an image URL, replace it with an <img> tag
1279                         # This happened by accident in the original parser, but some people used it extensively
1280                         $img = $this->maybeMakeExternalImage( $text );
1281                         if ( $img !== false ) {
1282                                 $text = $img;
1283                         }
1284
1285                         $dtrail = '';
1286
1287                         # Set linktype for CSS - if URL==text, link is essentially free
1288                         $linktype = ($text == $url) ? 'free' : 'text';
1289
1290                         # No link text, e.g. [http://domain.tld/some.link]
1291                         if ( $text == '' ) {
1292                                 # Autonumber if allowed. See bug #5918
1293                                 if ( strpos( wfUrlProtocols(), substr($protocol, 0, strpos($protocol, ':')) ) !== false ) {
1294                                         $text = '[' . ++$this->mAutonumber . ']';
1295                                         $linktype = 'autonumber';
1296                                 } else {
1297                                         # Otherwise just use the URL
1298                                         $text = htmlspecialchars( $url );
1299                                         $linktype = 'free';
1300                                 }
1301                         } else {
1302                                 # Have link text, e.g. [http://domain.tld/some.link text]s
1303                                 # Check for trail
1304                                 list( $dtrail, $trail ) = Linker::splitTrail( $trail );
1305                         }
1306
1307                         $text = $wgContLang->markNoConversion($text);
1308
1309                         $url = Sanitizer::cleanUrl( $url );
1310
1311                         # Process the trail (i.e. everything after this link up until start of the next link),
1312                         # replacing any non-bracketed links
1313                         $trail = $this->replaceFreeExternalLinks( $trail );
1314
1315                         # Use the encoded URL
1316                         # This means that users can paste URLs directly into the text
1317                         # Funny characters like &ouml; aren't valid in URLs anyway
1318                         # This was changed in August 2004
1319                         $s .= $sk->makeExternalLink( $url, $text, false, $linktype, $this->mTitle->getNamespace() ) . $dtrail . $trail;
1320
1321                         # Register link in the output object.
1322                         # Replace unnecessary URL escape codes with the referenced character
1323                         # This prevents spammers from hiding links from the filters
1324                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1325                         $this->mOutput->addExternalLink( $pasteurized );
1326                 }
1327
1328                 wfProfileOut( $fname );
1329                 return $s;
1330         }
1331
1332         /**
1333          * Replace anything that looks like a URL with a link
1334          * @private
1335          */
1336         function replaceFreeExternalLinks( $text ) {
1337                 global $wgContLang;
1338                 $fname = 'Parser::replaceFreeExternalLinks';
1339                 wfProfileIn( $fname );
1340
1341                 $bits = preg_split( '/(\b(?:' . wfUrlProtocols() . '))/S', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1342                 $s = array_shift( $bits );
1343                 $i = 0;
1344
1345                 $sk = $this->mOptions->getSkin();
1346
1347                 while ( $i < count( $bits ) ){
1348                         $protocol = $bits[$i++];
1349                         $remainder = $bits[$i++];
1350
1351                         $m = array();
1352                         if ( preg_match( '/^('.self::EXT_LINK_URL_CLASS.'+)(.*)$/s', $remainder, $m ) ) {
1353                                 # Found some characters after the protocol that look promising
1354                                 $url = $protocol . $m[1];
1355                                 $trail = $m[2];
1356
1357                                 # special case: handle urls as url args:
1358                                 # http://www.example.com/foo?=http://www.example.com/bar
1359                                 if(strlen($trail) == 0 &&
1360                                         isset($bits[$i]) &&
1361                                         preg_match('/^'. wfUrlProtocols() . '$/S', $bits[$i]) &&
1362                                         preg_match( '/^('.self::EXT_LINK_URL_CLASS.'+)(.*)$/s', $bits[$i + 1], $m ))
1363                                 {
1364                                         # add protocol, arg
1365                                         $url .= $bits[$i] . $m[1]; # protocol, url as arg to previous link
1366                                         $i += 2;
1367                                         $trail = $m[2];
1368                                 }
1369
1370                                 # The characters '<' and '>' (which were escaped by
1371                                 # removeHTMLtags()) should not be included in
1372                                 # URLs, per RFC 2396.
1373                                 $m2 = array();
1374                                 if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1375                                         $trail = substr($url, $m2[0][1]) . $trail;
1376                                         $url = substr($url, 0, $m2[0][1]);
1377                                 }
1378
1379                                 # Move trailing punctuation to $trail
1380                                 $sep = ',;\.:!?';
1381                                 # If there is no left bracket, then consider right brackets fair game too
1382                                 if ( strpos( $url, '(' ) === false ) {
1383                                         $sep .= ')';
1384                                 }
1385
1386                                 $numSepChars = strspn( strrev( $url ), $sep );
1387                                 if ( $numSepChars ) {
1388                                         $trail = substr( $url, -$numSepChars ) . $trail;
1389                                         $url = substr( $url, 0, -$numSepChars );
1390                                 }
1391
1392                                 $url = Sanitizer::cleanUrl( $url );
1393
1394                                 # Is this an external image?
1395                                 $text = $this->maybeMakeExternalImage( $url );
1396                                 if ( $text === false ) {
1397                                         # Not an image, make a link
1398                                         $text = $sk->makeExternalLink( $url, $wgContLang->markNoConversion($url), true, 'free', $this->mTitle->getNamespace() );
1399                                         # Register it in the output object...
1400                                         # Replace unnecessary URL escape codes with their equivalent characters
1401                                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1402                                         $this->mOutput->addExternalLink( $pasteurized );
1403                                 }
1404                                 $s .= $text . $trail;
1405                         } else {
1406                                 $s .= $protocol . $remainder;
1407                         }
1408                 }
1409                 wfProfileOut( $fname );
1410                 return $s;
1411         }
1412
1413         /**
1414          * Replace unusual URL escape codes with their equivalent characters
1415          * @param string
1416          * @return string
1417          * @static
1418          * @todo  This can merge genuinely required bits in the path or query string,
1419          *        breaking legit URLs. A proper fix would treat the various parts of
1420          *        the URL differently; as a workaround, just use the output for
1421          *        statistical records, not for actual linking/output.
1422          */
1423         static function replaceUnusualEscapes( $url ) {
1424                 return preg_replace_callback( '/%[0-9A-Fa-f]{2}/',
1425                         array( 'Parser', 'replaceUnusualEscapesCallback' ), $url );
1426         }
1427
1428         /**
1429          * Callback function used in replaceUnusualEscapes().
1430          * Replaces unusual URL escape codes with their equivalent character
1431          * @static
1432          * @private
1433          */
1434         private static function replaceUnusualEscapesCallback( $matches ) {
1435                 $char = urldecode( $matches[0] );
1436                 $ord = ord( $char );
1437                 // Is it an unsafe or HTTP reserved character according to RFC 1738?
1438                 if ( $ord > 32 && $ord < 127 && strpos( '<>"#{}|\^~[]`;/?', $char ) === false ) {
1439                         // No, shouldn't be escaped
1440                         return $char;
1441                 } else {
1442                         // Yes, leave it escaped
1443                         return $matches[0];
1444                 }
1445         }
1446
1447         /**
1448          * make an image if it's allowed, either through the global
1449          * option or through the exception
1450          * @private
1451          */
1452         function maybeMakeExternalImage( $url ) {
1453                 $sk = $this->mOptions->getSkin();
1454                 $imagesfrom = $this->mOptions->getAllowExternalImagesFrom();
1455                 $imagesexception = !empty($imagesfrom);
1456                 $text = false;
1457                 if ( $this->mOptions->getAllowExternalImages()
1458                      || ( $imagesexception && strpos( $url, $imagesfrom ) === 0 ) ) {
1459                         if ( preg_match( self::EXT_IMAGE_REGEX, $url ) ) {
1460                                 # Image found
1461                                 $text = $sk->makeExternalImage( htmlspecialchars( $url ) );
1462                         }
1463                 }
1464                 return $text;
1465         }
1466
1467         /**
1468          * Process [[ ]] wikilinks
1469          *
1470          * @private
1471          */
1472         function replaceInternalLinks( $s ) {
1473                 global $wgContLang;
1474                 static $fname = 'Parser::replaceInternalLinks' ;
1475
1476                 wfProfileIn( $fname );
1477
1478                 wfProfileIn( $fname.'-setup' );
1479                 static $tc = FALSE;
1480                 # the % is needed to support urlencoded titles as well
1481                 if ( !$tc ) { $tc = Title::legalChars() . '#%'; }
1482
1483                 $sk = $this->mOptions->getSkin();
1484
1485                 #split the entire text string on occurences of [[
1486                 $a = explode( '[[', ' ' . $s );
1487                 #get the first element (all text up to first [[), and remove the space we added
1488                 $s = array_shift( $a );
1489                 $s = substr( $s, 1 );
1490
1491                 # Match a link having the form [[namespace:link|alternate]]trail
1492                 static $e1 = FALSE;
1493                 if ( !$e1 ) { $e1 = "/^([{$tc}]+)(?:\\|(.+?))?]](.*)\$/sD"; }
1494                 # Match cases where there is no "]]", which might still be images
1495                 static $e1_img = FALSE;
1496                 if ( !$e1_img ) { $e1_img = "/^([{$tc}]+)\\|(.*)\$/sD"; }
1497
1498                 $useLinkPrefixExtension = $wgContLang->linkPrefixExtension();
1499                 $e2 = null;
1500                 if ( $useLinkPrefixExtension ) {
1501                         # Match the end of a line for a word that's not followed by whitespace,
1502                         # e.g. in the case of 'The Arab al[[Razi]]', 'al' will be matched
1503                         $e2 = wfMsgForContent( 'linkprefix' );
1504                 }
1505
1506                 if( is_null( $this->mTitle ) ) {
1507                         throw new MWException( __METHOD__.": \$this->mTitle is null\n" );
1508                 }
1509                 $nottalk = !$this->mTitle->isTalkPage();
1510
1511                 if ( $useLinkPrefixExtension ) {
1512                         $m = array();
1513                         if ( preg_match( $e2, $s, $m ) ) {
1514                                 $first_prefix = $m[2];
1515                         } else {
1516                                 $first_prefix = false;
1517                         }
1518                 } else {
1519                         $prefix = '';
1520                 }
1521
1522                 if($wgContLang->hasVariants()) {
1523                         $selflink = $wgContLang->convertLinkToAllVariants($this->mTitle->getPrefixedText());
1524                 } else {
1525                         $selflink = array($this->mTitle->getPrefixedText());
1526                 }
1527                 $useSubpages = $this->areSubpagesAllowed();
1528                 wfProfileOut( $fname.'-setup' );
1529
1530                 # Loop for each link
1531                 for ($k = 0; isset( $a[$k] ); $k++) {
1532                         $line = $a[$k];
1533                         if ( $useLinkPrefixExtension ) {
1534                                 wfProfileIn( $fname.'-prefixhandling' );
1535                                 if ( preg_match( $e2, $s, $m ) ) {
1536                                         $prefix = $m[2];
1537                                         $s = $m[1];
1538                                 } else {
1539                                         $prefix='';
1540                                 }
1541                                 # first link
1542                                 if($first_prefix) {
1543                                         $prefix = $first_prefix;
1544                                         $first_prefix = false;
1545                                 }
1546                                 wfProfileOut( $fname.'-prefixhandling' );
1547                         }
1548
1549                         $might_be_img = false;
1550
1551                         wfProfileIn( "$fname-e1" );
1552                         if ( preg_match( $e1, $line, $m ) ) { # page with normal text or alt
1553                                 $text = $m[2];
1554                                 # If we get a ] at the beginning of $m[3] that means we have a link that's something like:
1555                                 # [[Image:Foo.jpg|[http://example.com desc]]] <- having three ] in a row fucks up,
1556                                 # the real problem is with the $e1 regex
1557                                 # See bug 1300.
1558                                 #
1559                                 # Still some problems for cases where the ] is meant to be outside punctuation,
1560                                 # and no image is in sight. See bug 2095.
1561                                 #
1562                                 if( $text !== '' &&
1563                                         substr( $m[3], 0, 1 ) === ']' &&
1564                                         strpos($text, '[') !== false
1565                                 )
1566                                 {
1567                                         $text .= ']'; # so that replaceExternalLinks($text) works later
1568                                         $m[3] = substr( $m[3], 1 );
1569                                 }
1570                                 # fix up urlencoded title texts
1571                                 if( strpos( $m[1], '%' ) !== false ) {
1572                                         # Should anchors '#' also be rejected?
1573                                         $m[1] = str_replace( array('<', '>'), array('&lt;', '&gt;'), urldecode($m[1]) );
1574                                 }
1575                                 $trail = $m[3];
1576                         } elseif( preg_match($e1_img, $line, $m) ) { # Invalid, but might be an image with a link in its caption
1577                                 $might_be_img = true;
1578                                 $text = $m[2];
1579                                 if ( strpos( $m[1], '%' ) !== false ) {
1580                                         $m[1] = urldecode($m[1]);
1581                                 }
1582                                 $trail = "";
1583                         } else { # Invalid form; output directly
1584                                 $s .= $prefix . '[[' . $line ;
1585                                 wfProfileOut( "$fname-e1" );
1586                                 continue;
1587                         }
1588                         wfProfileOut( "$fname-e1" );
1589                         wfProfileIn( "$fname-misc" );
1590
1591                         # Don't allow internal links to pages containing
1592                         # PROTO: where PROTO is a valid URL protocol; these
1593                         # should be external links.
1594                         if (preg_match('/^\b(?:' . wfUrlProtocols() . ')/', $m[1])) {
1595                                 $s .= $prefix . '[[' . $line ;
1596                                 continue;
1597                         }
1598
1599                         # Make subpage if necessary
1600                         if( $useSubpages ) {
1601                                 $link = $this->maybeDoSubpageLink( $m[1], $text );
1602                         } else {
1603                                 $link = $m[1];
1604                         }
1605
1606                         $noforce = (substr($m[1], 0, 1) != ':');
1607                         if (!$noforce) {
1608                                 # Strip off leading ':'
1609                                 $link = substr($link, 1);
1610                         }
1611
1612                         wfProfileOut( "$fname-misc" );
1613                         wfProfileIn( "$fname-title" );
1614                         $nt = Title::newFromText( $this->mStripState->unstripNoWiki($link) );
1615                         if( !$nt ) {
1616                                 $s .= $prefix . '[[' . $line;
1617                                 wfProfileOut( "$fname-title" );
1618                                 continue;
1619                         }
1620
1621                         $ns = $nt->getNamespace();
1622                         $iw = $nt->getInterWiki();
1623                         wfProfileOut( "$fname-title" );
1624
1625                         if ($might_be_img) { # if this is actually an invalid link
1626                                 wfProfileIn( "$fname-might_be_img" );
1627                                 if ($ns == NS_IMAGE && $noforce) { #but might be an image
1628                                         $found = false;
1629                                         while (isset ($a[$k+1]) ) {
1630                                                 #look at the next 'line' to see if we can close it there
1631                                                 $spliced = array_splice( $a, $k + 1, 1 );
1632                                                 $next_line = array_shift( $spliced );
1633                                                 $m = explode( ']]', $next_line, 3 );
1634                                                 if ( count( $m ) == 3 ) {
1635                                                         # the first ]] closes the inner link, the second the image
1636                                                         $found = true;
1637                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1638                                                         $trail = $m[2];
1639                                                         break;
1640                                                 } elseif ( count( $m ) == 2 ) {
1641                                                         #if there's exactly one ]] that's fine, we'll keep looking
1642                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1643                                                 } else {
1644                                                         #if $next_line is invalid too, we need look no further
1645                                                         $text .= '[[' . $next_line;
1646                                                         break;
1647                                                 }
1648                                         }
1649                                         if ( !$found ) {
1650                                                 # we couldn't find the end of this imageLink, so output it raw
1651                                                 #but don't ignore what might be perfectly normal links in the text we've examined
1652                                                 $text = $this->replaceInternalLinks($text);
1653                                                 $s .= "{$prefix}[[$link|$text";
1654                                                 # note: no $trail, because without an end, there *is* no trail
1655                                                 wfProfileOut( "$fname-might_be_img" );
1656                                                 continue;
1657                                         }
1658                                 } else { #it's not an image, so output it raw
1659                                         $s .= "{$prefix}[[$link|$text";
1660                                         # note: no $trail, because without an end, there *is* no trail
1661                                         wfProfileOut( "$fname-might_be_img" );
1662                                         continue;
1663                                 }
1664                                 wfProfileOut( "$fname-might_be_img" );
1665                         }
1666
1667                         $wasblank = ( '' == $text );
1668                         if( $wasblank ) $text = $link;
1669
1670                         # Link not escaped by : , create the various objects
1671                         if( $noforce ) {
1672
1673                                 # Interwikis
1674                                 wfProfileIn( "$fname-interwiki" );
1675                                 if( $iw && $this->mOptions->getInterwikiMagic() && $nottalk && $wgContLang->getLanguageName( $iw ) ) {
1676                                         $this->mOutput->addLanguageLink( $nt->getFullText() );
1677                                         $s = rtrim($s . $prefix);
1678                                         $s .= trim($trail, "\n") == '' ? '': $prefix . $trail;
1679                                         wfProfileOut( "$fname-interwiki" );
1680                                         continue;
1681                                 }
1682                                 wfProfileOut( "$fname-interwiki" );
1683
1684                                 if ( $ns == NS_IMAGE ) {
1685                                         wfProfileIn( "$fname-image" );
1686                                         if ( !wfIsBadImage( $nt->getDBkey(), $this->mTitle ) ) {
1687                                                 # recursively parse links inside the image caption
1688                                                 # actually, this will parse them in any other parameters, too,
1689                                                 # but it might be hard to fix that, and it doesn't matter ATM
1690                                                 $text = $this->replaceExternalLinks($text);
1691                                                 $text = $this->replaceInternalLinks($text);
1692
1693                                                 # cloak any absolute URLs inside the image markup, so replaceExternalLinks() won't touch them
1694                                                 $s .= $prefix . $this->armorLinks( $this->makeImage( $nt, $text ) ) . $trail;
1695                                                 $this->mOutput->addImage( $nt->getDBkey() );
1696
1697                                                 wfProfileOut( "$fname-image" );
1698                                                 continue;
1699                                         } else {
1700                                                 # We still need to record the image's presence on the page
1701                                                 $this->mOutput->addImage( $nt->getDBkey() );
1702                                         }
1703                                         wfProfileOut( "$fname-image" );
1704
1705                                 }
1706
1707                                 if ( $ns == NS_CATEGORY ) {
1708                                         wfProfileIn( "$fname-category" );
1709                                         $s = rtrim($s . "\n"); # bug 87
1710
1711                                         if ( $wasblank ) {
1712                                                 $sortkey = $this->getDefaultSort();
1713                                         } else {
1714                                                 $sortkey = $text;
1715                                         }
1716                                         $sortkey = Sanitizer::decodeCharReferences( $sortkey );
1717                                         $sortkey = str_replace( "\n", '', $sortkey );
1718                                         $sortkey = $wgContLang->convertCategoryKey( $sortkey );
1719                                         $this->mOutput->addCategory( $nt->getDBkey(), $sortkey );
1720
1721                                         /**
1722                                          * Strip the whitespace Category links produce, see bug 87
1723                                          * @todo We might want to use trim($tmp, "\n") here.
1724                                          */
1725                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1726
1727                                         wfProfileOut( "$fname-category" );
1728                                         continue;
1729                                 }
1730                         }
1731
1732                         # Self-link checking
1733                         if( $nt->getFragment() === '' ) {
1734                                 if( in_array( $nt->getPrefixedText(), $selflink, true ) ) {
1735                                         $s .= $prefix . $sk->makeSelfLinkObj( $nt, $text, '', $trail );
1736                                         continue;
1737                                 }
1738                         }
1739
1740                         # Special and Media are pseudo-namespaces; no pages actually exist in them
1741                         if( $ns == NS_MEDIA ) {
1742                                 $link = $sk->makeMediaLinkObj( $nt, $text );
1743                                 # Cloak with NOPARSE to avoid replacement in replaceExternalLinks
1744                                 $s .= $prefix . $this->armorLinks( $link ) . $trail;
1745                                 $this->mOutput->addImage( $nt->getDBkey() );
1746                                 continue;
1747                         } elseif( $ns == NS_SPECIAL ) {
1748                                 if( SpecialPage::exists( $nt->getDBkey() ) ) {
1749                                         $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1750                                 } else {
1751                                         $s .= $this->makeLinkHolder( $nt, $text, '', $trail, $prefix );
1752                                 }
1753                                 continue;
1754                         } elseif( $ns == NS_IMAGE ) {
1755                                 $img = wfFindFile( $nt );
1756                                 if( $img ) {
1757                                         // Force a blue link if the file exists; may be a remote
1758                                         // upload on the shared repository, and we want to see its
1759                                         // auto-generated page.
1760                                         $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1761                                         $this->mOutput->addLink( $nt );
1762                                         continue;
1763                                 }
1764                         }
1765                         $s .= $this->makeLinkHolder( $nt, $text, '', $trail, $prefix );
1766                 }
1767                 wfProfileOut( $fname );
1768                 return $s;
1769         }
1770
1771         /**
1772          * Make a link placeholder. The text returned can be later resolved to a real link with
1773          * replaceLinkHolders(). This is done for two reasons: firstly to avoid further
1774          * parsing of interwiki links, and secondly to allow all existence checks and
1775          * article length checks (for stub links) to be bundled into a single query.
1776          *
1777          */
1778         function makeLinkHolder( &$nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1779                 wfProfileIn( __METHOD__ );
1780                 if ( ! is_object($nt) ) {
1781                         # Fail gracefully
1782                         $retVal = "<!-- ERROR -->{$prefix}{$text}{$trail}";
1783                 } else {
1784                         # Separate the link trail from the rest of the link
1785                         list( $inside, $trail ) = Linker::splitTrail( $trail );
1786
1787                         if ( $nt->isExternal() ) {
1788                                 $nr = array_push( $this->mInterwikiLinkHolders['texts'], $prefix.$text.$inside );
1789                                 $this->mInterwikiLinkHolders['titles'][] = $nt;
1790                                 $retVal = '<!--IWLINK '. ($nr-1) ."-->{$trail}";
1791                         } else {
1792                                 $nr = array_push( $this->mLinkHolders['namespaces'], $nt->getNamespace() );
1793                                 $this->mLinkHolders['dbkeys'][] = $nt->getDBkey();
1794                                 $this->mLinkHolders['queries'][] = $query;
1795                                 $this->mLinkHolders['texts'][] = $prefix.$text.$inside;
1796                                 $this->mLinkHolders['titles'][] = $nt;
1797
1798                                 $retVal = '<!--LINK '. ($nr-1) ."-->{$trail}";
1799                         }
1800                 }
1801                 wfProfileOut( __METHOD__ );
1802                 return $retVal;
1803         }
1804
1805         /**
1806          * Render a forced-blue link inline; protect against double expansion of
1807          * URLs if we're in a mode that prepends full URL prefixes to internal links.
1808          * Since this little disaster has to split off the trail text to avoid
1809          * breaking URLs in the following text without breaking trails on the
1810          * wiki links, it's been made into a horrible function.
1811          *
1812          * @param Title $nt
1813          * @param string $text
1814          * @param string $query
1815          * @param string $trail
1816          * @param string $prefix
1817          * @return string HTML-wikitext mix oh yuck
1818          */
1819         function makeKnownLinkHolder( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1820                 list( $inside, $trail ) = Linker::splitTrail( $trail );
1821                 $sk = $this->mOptions->getSkin();
1822                 $link = $sk->makeKnownLinkObj( $nt, $text, $query, $inside, $prefix );
1823                 return $this->armorLinks( $link ) . $trail;
1824         }
1825
1826         /**
1827          * Insert a NOPARSE hacky thing into any inline links in a chunk that's
1828          * going to go through further parsing steps before inline URL expansion.
1829          *
1830          * In particular this is important when using action=render, which causes
1831          * full URLs to be included.
1832          *
1833          * Oh man I hate our multi-layer parser!
1834          *
1835          * @param string more-or-less HTML
1836          * @return string less-or-more HTML with NOPARSE bits
1837          */
1838         function armorLinks( $text ) {
1839                 return preg_replace( '/\b(' . wfUrlProtocols() . ')/',
1840                         "{$this->mUniqPrefix}NOPARSE$1", $text );
1841         }
1842
1843         /**
1844          * Return true if subpage links should be expanded on this page.
1845          * @return bool
1846          */
1847         function areSubpagesAllowed() {
1848                 # Some namespaces don't allow subpages
1849                 global $wgNamespacesWithSubpages;
1850                 return !empty($wgNamespacesWithSubpages[$this->mTitle->getNamespace()]);
1851         }
1852
1853         /**
1854          * Handle link to subpage if necessary
1855          * @param string $target the source of the link
1856          * @param string &$text the link text, modified as necessary
1857          * @return string the full name of the link
1858          * @private
1859          */
1860         function maybeDoSubpageLink($target, &$text) {
1861                 # Valid link forms:
1862                 # Foobar -- normal
1863                 # :Foobar -- override special treatment of prefix (images, language links)
1864                 # /Foobar -- convert to CurrentPage/Foobar
1865                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1866                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1867                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1868
1869                 $fname = 'Parser::maybeDoSubpageLink';
1870                 wfProfileIn( $fname );
1871                 $ret = $target; # default return value is no change
1872
1873                 # Some namespaces don't allow subpages,
1874                 # so only perform processing if subpages are allowed
1875                 if( $this->areSubpagesAllowed() ) {
1876                         $hash = strpos( $target, '#' );
1877                         if( $hash !== false ) {
1878                                 $suffix = substr( $target, $hash );
1879                                 $target = substr( $target, 0, $hash );
1880                         } else {
1881                                 $suffix = '';
1882                         }
1883                         # bug 7425
1884                         $target = trim( $target );
1885                         # Look at the first character
1886                         if( $target != '' && $target{0} == '/' ) {
1887                                 # / at end means we don't want the slash to be shown
1888                                 $m = array();
1889                                 $trailingSlashes = preg_match_all( '%(/+)$%', $target, $m );
1890                                 if( $trailingSlashes ) {
1891                                         $noslash = $target = substr( $target, 1, -strlen($m[0][0]) );
1892                                 } else {
1893                                         $noslash = substr( $target, 1 );
1894                                 }
1895
1896                                 $ret = $this->mTitle->getPrefixedText(). '/' . trim($noslash) . $suffix;
1897                                 if( '' === $text ) {
1898                                         $text = $target . $suffix;
1899                                 } # this might be changed for ugliness reasons
1900                         } else {
1901                                 # check for .. subpage backlinks
1902                                 $dotdotcount = 0;
1903                                 $nodotdot = $target;
1904                                 while( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1905                                         ++$dotdotcount;
1906                                         $nodotdot = substr( $nodotdot, 3 );
1907                                 }
1908                                 if($dotdotcount > 0) {
1909                                         $exploded = explode( '/', $this->mTitle->GetPrefixedText() );
1910                                         if( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1911                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1912                                                 # / at the end means don't show full path
1913                                                 if( substr( $nodotdot, -1, 1 ) == '/' ) {
1914                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1915                                                         if( '' === $text ) {
1916                                                                 $text = $nodotdot . $suffix;
1917                                                         }
1918                                                 }
1919                                                 $nodotdot = trim( $nodotdot );
1920                                                 if( $nodotdot != '' ) {
1921                                                         $ret .= '/' . $nodotdot;
1922                                                 }
1923                                                 $ret .= $suffix;
1924                                         }
1925                                 }
1926                         }
1927                 }
1928
1929                 wfProfileOut( $fname );
1930                 return $ret;
1931         }
1932
1933         /**#@+
1934          * Used by doBlockLevels()
1935          * @private
1936          */
1937         /* private */ function closeParagraph() {
1938                 $result = '';
1939                 if ( '' != $this->mLastSection ) {
1940                         $result = '</' . $this->mLastSection  . ">\n";
1941                 }
1942                 $this->mInPre = false;
1943                 $this->mLastSection = '';
1944                 return $result;
1945         }
1946         # getCommon() returns the length of the longest common substring
1947         # of both arguments, starting at the beginning of both.
1948         #
1949         /* private */ function getCommon( $st1, $st2 ) {
1950                 $fl = strlen( $st1 );
1951                 $shorter = strlen( $st2 );
1952                 if ( $fl < $shorter ) { $shorter = $fl; }
1953
1954                 for ( $i = 0; $i < $shorter; ++$i ) {
1955                         if ( $st1{$i} != $st2{$i} ) { break; }
1956                 }
1957                 return $i;
1958         }
1959         # These next three functions open, continue, and close the list
1960         # element appropriate to the prefix character passed into them.
1961         #
1962         /* private */ function openList( $char ) {
1963                 $result = $this->closeParagraph();
1964
1965                 if ( '*' == $char ) { $result .= '<ul><li>'; }
1966                 else if ( '#' == $char ) { $result .= '<ol><li>'; }
1967                 else if ( ':' == $char ) { $result .= '<dl><dd>'; }
1968                 else if ( ';' == $char ) {
1969                         $result .= '<dl><dt>';
1970                         $this->mDTopen = true;
1971                 }
1972                 else { $result = '<!-- ERR 1 -->'; }
1973
1974                 return $result;
1975         }
1976
1977         /* private */ function nextItem( $char ) {
1978                 if ( '*' == $char || '#' == $char ) { return '</li><li>'; }
1979                 else if ( ':' == $char || ';' == $char ) {
1980                         $close = '</dd>';
1981                         if ( $this->mDTopen ) { $close = '</dt>'; }
1982                         if ( ';' == $char ) {
1983                                 $this->mDTopen = true;
1984                                 return $close . '<dt>';
1985                         } else {
1986                                 $this->mDTopen = false;
1987                                 return $close . '<dd>';
1988                         }
1989                 }
1990                 return '<!-- ERR 2 -->';
1991         }
1992
1993         /* private */ function closeList( $char ) {
1994                 if ( '*' == $char ) { $text = '</li></ul>'; }
1995                 else if ( '#' == $char ) { $text = '</li></ol>'; }
1996                 else if ( ':' == $char ) {
1997                         if ( $this->mDTopen ) {
1998                                 $this->mDTopen = false;
1999                                 $text = '</dt></dl>';
2000                         } else {
2001                                 $text = '</dd></dl>';
2002                         }
2003                 }
2004                 else {  return '<!-- ERR 3 -->'; }
2005                 return $text."\n";
2006         }
2007         /**#@-*/
2008
2009         /**
2010          * Make lists from lines starting with ':', '*', '#', etc.
2011          *
2012          * @private
2013          * @return string the lists rendered as HTML
2014          */
2015         function doBlockLevels( $text, $linestart ) {
2016                 $fname = 'Parser::doBlockLevels';
2017                 wfProfileIn( $fname );
2018
2019                 # Parsing through the text line by line.  The main thing
2020                 # happening here is handling of block-level elements p, pre,
2021                 # and making lists from lines starting with * # : etc.
2022                 #
2023                 $textLines = explode( "\n", $text );
2024
2025                 $lastPrefix = $output = '';
2026                 $this->mDTopen = $inBlockElem = false;
2027                 $prefixLength = 0;
2028                 $paragraphStack = false;
2029
2030                 if ( !$linestart ) {
2031                         $output .= array_shift( $textLines );
2032                 }
2033                 foreach ( $textLines as $oLine ) {
2034                         $lastPrefixLength = strlen( $lastPrefix );
2035                         $preCloseMatch = preg_match('/<\\/pre/i', $oLine );
2036                         $preOpenMatch = preg_match('/<pre/i', $oLine );
2037                         if ( !$this->mInPre ) {
2038                                 # Multiple prefixes may abut each other for nested lists.
2039                                 $prefixLength = strspn( $oLine, '*#:;' );
2040                                 $pref = substr( $oLine, 0, $prefixLength );
2041
2042                                 # eh?
2043                                 $pref2 = str_replace( ';', ':', $pref );
2044                                 $t = substr( $oLine, $prefixLength );
2045                                 $this->mInPre = !empty($preOpenMatch);
2046                         } else {
2047                                 # Don't interpret any other prefixes in preformatted text
2048                                 $prefixLength = 0;
2049                                 $pref = $pref2 = '';
2050                                 $t = $oLine;
2051                         }
2052
2053                         # List generation
2054                         if( $prefixLength && 0 == strcmp( $lastPrefix, $pref2 ) ) {
2055                                 # Same as the last item, so no need to deal with nesting or opening stuff
2056                                 $output .= $this->nextItem( substr( $pref, -1 ) );
2057                                 $paragraphStack = false;
2058
2059                                 if ( substr( $pref, -1 ) == ';') {
2060                                         # The one nasty exception: definition lists work like this:
2061                                         # ; title : definition text
2062                                         # So we check for : in the remainder text to split up the
2063                                         # title and definition, without b0rking links.
2064                                         $term = $t2 = '';
2065                                         if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2066                                                 $t = $t2;
2067                                                 $output .= $term . $this->nextItem( ':' );
2068                                         }
2069                                 }
2070                         } elseif( $prefixLength || $lastPrefixLength ) {
2071                                 # Either open or close a level...
2072                                 $commonPrefixLength = $this->getCommon( $pref, $lastPrefix );
2073                                 $paragraphStack = false;
2074
2075                                 while( $commonPrefixLength < $lastPrefixLength ) {
2076                                         $output .= $this->closeList( $lastPrefix{$lastPrefixLength-1} );
2077                                         --$lastPrefixLength;
2078                                 }
2079                                 if ( $prefixLength <= $commonPrefixLength && $commonPrefixLength > 0 ) {
2080                                         $output .= $this->nextItem( $pref{$commonPrefixLength-1} );
2081                                 }
2082                                 while ( $prefixLength > $commonPrefixLength ) {
2083                                         $char = substr( $pref, $commonPrefixLength, 1 );
2084                                         $output .= $this->openList( $char );
2085
2086                                         if ( ';' == $char ) {
2087                                                 # FIXME: This is dupe of code above
2088                                                 if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2089                                                         $t = $t2;
2090                                                         $output .= $term . $this->nextItem( ':' );
2091                                                 }
2092                                         }
2093                                         ++$commonPrefixLength;
2094                                 }
2095                                 $lastPrefix = $pref2;
2096                         }
2097                         if( 0 == $prefixLength ) {
2098                                 wfProfileIn( "$fname-paragraph" );
2099                                 # No prefix (not in list)--go to paragraph mode
2100                                 // XXX: use a stack for nestable elements like span, table and div
2101                                 $openmatch = preg_match('/(?:<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<pre|<tr|<p|<ul|<ol|<li|<\\/tr|<\\/td|<\\/th)/iS', $t );
2102                                 $closematch = preg_match(
2103                                         '/(?:<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6|'.
2104                                         '<td|<th|<\\/?div|<hr|<\\/pre|<\\/p|'.$this->mUniqPrefix.'-pre|<\\/li|<\\/ul|<\\/ol|<\\/?center)/iS', $t );
2105                                 if ( $openmatch or $closematch ) {
2106                                         $paragraphStack = false;
2107                                         # TODO bug 5718: paragraph closed
2108                                         $output .= $this->closeParagraph();
2109                                         if ( $preOpenMatch and !$preCloseMatch ) {
2110                                                 $this->mInPre = true;
2111                                         }
2112                                         if ( $closematch ) {
2113                                                 $inBlockElem = false;
2114                                         } else {
2115                                                 $inBlockElem = true;
2116                                         }
2117                                 } else if ( !$inBlockElem && !$this->mInPre ) {
2118                                         if ( ' ' == $t{0} and ( $this->mLastSection == 'pre' or trim($t) != '' ) ) {
2119                                                 // pre
2120                                                 if ($this->mLastSection != 'pre') {
2121                                                         $paragraphStack = false;
2122                                                         $output .= $this->closeParagraph().'<pre>';
2123                                                         $this->mLastSection = 'pre';
2124                                                 }
2125                                                 $t = substr( $t, 1 );
2126                                         } else {
2127                                                 // paragraph
2128                                                 if ( '' == trim($t) ) {
2129                                                         if ( $paragraphStack ) {
2130                                                                 $output .= $paragraphStack.'<br />';
2131                                                                 $paragraphStack = false;
2132                                                                 $this->mLastSection = 'p';
2133                                                         } else {
2134                                                                 if ($this->mLastSection != 'p' ) {
2135                                                                         $output .= $this->closeParagraph();
2136                                                                         $this->mLastSection = '';
2137                                                                         $paragraphStack = '<p>';
2138                                                                 } else {
2139                                                                         $paragraphStack = '</p><p>';
2140                                                                 }
2141                                                         }
2142                                                 } else {
2143                                                         if ( $paragraphStack ) {
2144                                                                 $output .= $paragraphStack;
2145                                                                 $paragraphStack = false;
2146                                                                 $this->mLastSection = 'p';
2147                                                         } else if ($this->mLastSection != 'p') {
2148                                                                 $output .= $this->closeParagraph().'<p>';
2149                                                                 $this->mLastSection = 'p';
2150                                                         }
2151                                                 }
2152                                         }
2153                                 }
2154                                 wfProfileOut( "$fname-paragraph" );
2155                         }
2156                         // somewhere above we forget to get out of pre block (bug 785)
2157                         if($preCloseMatch && $this->mInPre) {
2158                                 $this->mInPre = false;
2159                         }
2160                         if ($paragraphStack === false) {
2161                                 $output .= $t."\n";
2162                         }
2163                 }
2164                 while ( $prefixLength ) {
2165                         $output .= $this->closeList( $pref2{$prefixLength-1} );
2166                         --$prefixLength;
2167                 }
2168                 if ( '' != $this->mLastSection ) {
2169                         $output .= '</' . $this->mLastSection . '>';
2170                         $this->mLastSection = '';
2171                 }
2172
2173                 wfProfileOut( $fname );
2174                 return $output;
2175         }
2176
2177         /**
2178          * Split up a string on ':', ignoring any occurences inside tags
2179          * to prevent illegal overlapping.
2180          * @param string $str the string to split
2181          * @param string &$before set to everything before the ':'
2182          * @param string &$after set to everything after the ':'
2183          * return string the position of the ':', or false if none found
2184          */
2185         function findColonNoLinks($str, &$before, &$after) {
2186                 $fname = 'Parser::findColonNoLinks';
2187                 wfProfileIn( $fname );
2188
2189                 $pos = strpos( $str, ':' );
2190                 if( $pos === false ) {
2191                         // Nothing to find!
2192                         wfProfileOut( $fname );
2193                         return false;
2194                 }
2195
2196                 $lt = strpos( $str, '<' );
2197                 if( $lt === false || $lt > $pos ) {
2198                         // Easy; no tag nesting to worry about
2199                         $before = substr( $str, 0, $pos );
2200                         $after = substr( $str, $pos+1 );
2201                         wfProfileOut( $fname );
2202                         return $pos;
2203                 }
2204
2205                 // Ugly state machine to walk through avoiding tags.
2206                 $state = self::COLON_STATE_TEXT;
2207                 $stack = 0;
2208                 $len = strlen( $str );
2209                 for( $i = 0; $i < $len; $i++ ) {
2210                         $c = $str{$i};
2211
2212                         switch( $state ) {
2213                         // (Using the number is a performance hack for common cases)
2214                         case 0: // self::COLON_STATE_TEXT:
2215                                 switch( $c ) {
2216                                 case "<":
2217                                         // Could be either a <start> tag or an </end> tag
2218                                         $state = self::COLON_STATE_TAGSTART;
2219                                         break;
2220                                 case ":":
2221                                         if( $stack == 0 ) {
2222                                                 // We found it!
2223                                                 $before = substr( $str, 0, $i );
2224                                                 $after = substr( $str, $i + 1 );
2225                                                 wfProfileOut( $fname );
2226                                                 return $i;
2227                                         }
2228                                         // Embedded in a tag; don't break it.
2229                                         break;
2230                                 default:
2231                                         // Skip ahead looking for something interesting
2232                                         $colon = strpos( $str, ':', $i );
2233                                         if( $colon === false ) {
2234                                                 // Nothing else interesting
2235                                                 wfProfileOut( $fname );
2236                                                 return false;
2237                                         }
2238                                         $lt = strpos( $str, '<', $i );
2239                                         if( $stack === 0 ) {
2240                                                 if( $lt === false || $colon < $lt ) {
2241                                                         // We found it!
2242                                                         $before = substr( $str, 0, $colon );
2243                                                         $after = substr( $str, $colon + 1 );
2244                                                         wfProfileOut( $fname );
2245                                                         return $i;
2246                                                 }
2247                                         }
2248                                         if( $lt === false ) {
2249                                                 // Nothing else interesting to find; abort!
2250                                                 // We're nested, but there's no close tags left. Abort!
2251                                                 break 2;
2252                                         }
2253                                         // Skip ahead to next tag start
2254                                         $i = $lt;
2255                                         $state = self::COLON_STATE_TAGSTART;
2256                                 }
2257                                 break;
2258                         case 1: // self::COLON_STATE_TAG:
2259                                 // In a <tag>
2260                                 switch( $c ) {
2261                                 case ">":
2262                                         $stack++;
2263                                         $state = self::COLON_STATE_TEXT;
2264                                         break;
2265                                 case "/":
2266                                         // Slash may be followed by >?
2267                                         $state = self::COLON_STATE_TAGSLASH;
2268                                         break;
2269                                 default:
2270                                         // ignore
2271                                 }
2272                                 break;
2273                         case 2: // self::COLON_STATE_TAGSTART:
2274                                 switch( $c ) {
2275                                 case "/":
2276                                         $state = self::COLON_STATE_CLOSETAG;
2277                                         break;
2278                                 case "!":
2279                                         $state = self::COLON_STATE_COMMENT;
2280                                         break;
2281                                 case ">":
2282                                         // Illegal early close? This shouldn't happen D:
2283                                         $state = self::COLON_STATE_TEXT;
2284                                         break;
2285                                 default:
2286                                         $state = self::COLON_STATE_TAG;
2287                                 }
2288                                 break;
2289                         case 3: // self::COLON_STATE_CLOSETAG:
2290                                 // In a </tag>
2291                                 if( $c == ">" ) {
2292                                         $stack--;
2293                                         if( $stack < 0 ) {
2294                                                 wfDebug( "Invalid input in $fname; too many close tags\n" );
2295                                                 wfProfileOut( $fname );
2296                                                 return false;
2297                                         }
2298                                         $state = self::COLON_STATE_TEXT;
2299                                 }
2300                                 break;
2301                         case self::COLON_STATE_TAGSLASH:
2302                                 if( $c == ">" ) {
2303                                         // Yes, a self-closed tag <blah/>
2304                                         $state = self::COLON_STATE_TEXT;
2305                                 } else {
2306                                         // Probably we're jumping the gun, and this is an attribute
2307                                         $state = self::COLON_STATE_TAG;
2308                                 }
2309                                 break;
2310                         case 5: // self::COLON_STATE_COMMENT:
2311                                 if( $c == "-" ) {
2312                                         $state = self::COLON_STATE_COMMENTDASH;
2313                                 }
2314                                 break;
2315                         case self::COLON_STATE_COMMENTDASH:
2316                                 if( $c == "-" ) {
2317                                         $state = self::COLON_STATE_COMMENTDASHDASH;
2318                                 } else {
2319                                         $state = self::COLON_STATE_COMMENT;
2320                                 }
2321                                 break;
2322                         case self::COLON_STATE_COMMENTDASHDASH:
2323                                 if( $c == ">" ) {
2324                                         $state = self::COLON_STATE_TEXT;
2325                                 } else {
2326                                         $state = self::COLON_STATE_COMMENT;
2327                                 }
2328                                 break;
2329                         default:
2330                                 throw new MWException( "State machine error in $fname" );
2331                         }
2332                 }
2333                 if( $stack > 0 ) {
2334                         wfDebug( "Invalid input in $fname; not enough close tags (stack $stack, state $state)\n" );
2335                         return false;
2336                 }
2337                 wfProfileOut( $fname );
2338                 return false;
2339         }
2340
2341         /**
2342          * Return value of a magic variable (like PAGENAME)
2343          *
2344          * @private
2345          */
2346         function getVariableValue( $index ) {
2347                 global $wgContLang, $wgSitename, $wgServer, $wgServerName, $wgScriptPath;
2348
2349                 /**
2350                  * Some of these require message or data lookups and can be
2351                  * expensive to check many times.
2352                  */
2353                 if ( wfRunHooks( 'ParserGetVariableValueVarCache', array( &$this, &$this->mVarCache ) ) ) {
2354                         if ( isset( $this->mVarCache[$index] ) ) {
2355                                 return $this->mVarCache[$index];
2356                         }
2357                 }
2358
2359                 $ts = wfTimestamp( TS_UNIX, $this->mOptions->getTimestamp() );
2360                 wfRunHooks( 'ParserGetVariableValueTs', array( &$this, &$ts ) );
2361
2362                 # Use the time zone
2363                 global $wgLocaltimezone;
2364                 if ( isset( $wgLocaltimezone ) ) {
2365                         $oldtz = getenv( 'TZ' );
2366                         putenv( 'TZ='.$wgLocaltimezone );
2367                 }
2368
2369                 wfSuppressWarnings(); // E_STRICT system time bitching
2370                 $localTimestamp = date( 'YmdHis', $ts );
2371                 $localMonth = date( 'm', $ts );
2372                 $localMonthName = date( 'n', $ts );
2373                 $localDay = date( 'j', $ts );
2374                 $localDay2 = date( 'd', $ts );
2375                 $localDayOfWeek = date( 'w', $ts );
2376                 $localWeek = date( 'W', $ts );
2377                 $localYear = date( 'Y', $ts );
2378                 $localHour = date( 'H', $ts );
2379                 if ( isset( $wgLocaltimezone ) ) {
2380                         putenv( 'TZ='.$oldtz );
2381                 }
2382                 wfRestoreWarnings();
2383
2384                 switch ( $index ) {
2385                         case 'currentmonth':
2386                                 return $this->mVarCache[$index] = $wgContLang->formatNum( gmdate( 'm', $ts ) );
2387                         case 'currentmonthname':
2388                                 return $this->mVarCache[$index] = $wgContLang->getMonthName( gmdate( 'n', $ts ) );
2389                         case 'currentmonthnamegen':
2390                                 return $this->mVarCache[$index] = $wgContLang->getMonthNameGen( gmdate( 'n', $ts ) );
2391                         case 'currentmonthabbrev':
2392                                 return $this->mVarCache[$index] = $wgContLang->getMonthAbbreviation( gmdate( 'n', $ts ) );
2393                         case 'currentday':
2394                                 return $this->mVarCache[$index] = $wgContLang->formatNum( gmdate( 'j', $ts ) );
2395                         case 'currentday2':
2396                                 return $this->mVarCache[$index] = $wgContLang->formatNum( gmdate( 'd', $ts ) );
2397                         case 'localmonth':
2398                                 return $this->mVarCache[$index] = $wgContLang->formatNum( $localMonth );
2399                         case 'localmonthname':
2400                                 return $this->mVarCache[$index] = $wgContLang->getMonthName( $localMonthName );
2401                         case 'localmonthnamegen':
2402                                 return $this->mVarCache[$index] = $wgContLang->getMonthNameGen( $localMonthName );
2403                         case 'localmonthabbrev':
2404                                 return $this->mVarCache[$index] = $wgContLang->getMonthAbbreviation( $localMonthName );
2405                         case 'localday':
2406                                 return $this->mVarCache[$index] = $wgContLang->formatNum( $localDay );
2407                         case 'localday2':
2408                                 return $this->mVarCache[$index] = $wgContLang->formatNum( $localDay2 );
2409                         case 'pagename':
2410                                 return wfEscapeWikiText( $this->mTitle->getText() );
2411                         case 'pagenamee':
2412                                 return $this->mTitle->getPartialURL();
2413                         case 'fullpagename':
2414                                 return wfEscapeWikiText( $this->mTitle->getPrefixedText() );
2415                         case 'fullpagenamee':
2416                                 return $this->mTitle->getPrefixedURL();
2417                         case 'subpagename':
2418                                 return wfEscapeWikiText( $this->mTitle->getSubpageText() );
2419                         case 'subpagenamee':
2420                                 return $this->mTitle->getSubpageUrlForm();
2421                         case 'basepagename':
2422                                 return wfEscapeWikiText( $this->mTitle->getBaseText() );
2423                         case 'basepagenamee':
2424                                 return wfUrlEncode( str_replace( ' ', '_', $this->mTitle->getBaseText() ) );
2425                         case 'talkpagename':
2426                                 if( $this->mTitle->canTalk() ) {
2427                                         $talkPage = $this->mTitle->getTalkPage();
2428                                         return wfEscapeWikiText( $talkPage->getPrefixedText() );
2429                                 } else {
2430                                         return '';
2431                                 }
2432                         case 'talkpagenamee':
2433                                 if( $this->mTitle->canTalk() ) {
2434                                         $talkPage = $this->mTitle->getTalkPage();
2435                                         return $talkPage->getPrefixedUrl();
2436                                 } else {
2437                                         return '';
2438                                 }
2439                         case 'subjectpagename':
2440                                 $subjPage = $this->mTitle->getSubjectPage();
2441                                 return wfEscapeWikiText( $subjPage->getPrefixedText() );
2442                         case 'subjectpagenamee':
2443                                 $subjPage = $this->mTitle->getSubjectPage();
2444                                 return $subjPage->getPrefixedUrl();
2445                         case 'revisionid':
2446                                 // Let the edit saving system know we should parse the page
2447                                 // *after* a revision ID has been assigned.
2448                                 $this->mOutput->setFlag( 'vary-revision' );
2449                                 wfDebug( __METHOD__ . ": {{REVISIONID}} used, setting vary-revision...\n" );
2450                                 return $this->mRevisionId;
2451                         case 'revisionday':
2452                                 // Let the edit saving system know we should parse the page
2453                                 // *after* a revision ID has been assigned. This is for null edits.
2454                                 $this->mOutput->setFlag( 'vary-revision' );
2455                                 wfDebug( __METHOD__ . ": {{REVISIONDAY}} used, setting vary-revision...\n" );
2456                                 return intval( substr( $this->getRevisionTimestamp(), 6, 2 ) );
2457                         case 'revisionday2':
2458                                 // Let the edit saving system know we should parse the page
2459                                 // *after* a revision ID has been assigned. This is for null edits.
2460                                 $this->mOutput->setFlag( 'vary-revision' );
2461                                 wfDebug( __METHOD__ . ": {{REVISIONDAY2}} used, setting vary-revision...\n" );
2462                                 return substr( $this->getRevisionTimestamp(), 6, 2 );
2463                         case 'revisionmonth':
2464                                 // Let the edit saving system know we should parse the page
2465                                 // *after* a revision ID has been assigned. This is for null edits.
2466                                 $this->mOutput->setFlag( 'vary-revision' );
2467                                 wfDebug( __METHOD__ . ": {{REVISIONMONTH}} used, setting vary-revision...\n" );
2468                                 return intval( substr( $this->getRevisionTimestamp(), 4, 2 ) );
2469                         case 'revisionyear':
2470                                 // Let the edit saving system know we should parse the page
2471                                 // *after* a revision ID has been assigned. This is for null edits.
2472                                 $this->mOutput->setFlag( 'vary-revision' );
2473                                 wfDebug( __METHOD__ . ": {{REVISIONYEAR}} used, setting vary-revision...\n" );
2474                                 return substr( $this->getRevisionTimestamp(), 0, 4 );
2475                         case 'revisiontimestamp':
2476                                 // Let the edit saving system know we should parse the page
2477                                 // *after* a revision ID has been assigned. This is for null edits.
2478                                 $this->mOutput->setFlag( 'vary-revision' );
2479                                 wfDebug( __METHOD__ . ": {{REVISIONTIMESTAMP}} used, setting vary-revision...\n" );
2480                                 return $this->getRevisionTimestamp();
2481                         case 'namespace':
2482                                 return str_replace('_',' ',$wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2483                         case 'namespacee':
2484                                 return wfUrlencode( $wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2485                         case 'talkspace':
2486                                 return $this->mTitle->canTalk() ? str_replace('_',' ',$this->mTitle->getTalkNsText()) : '';
2487                         case 'talkspacee':
2488                                 return $this->mTitle->canTalk() ? wfUrlencode( $this->mTitle->getTalkNsText() ) : '';
2489                         case 'subjectspace':
2490                                 return $this->mTitle->getSubjectNsText();
2491                         case 'subjectspacee':
2492                                 return( wfUrlencode( $this->mTitle->getSubjectNsText() ) );
2493                         case 'currentdayname':
2494                                 return $this->mVarCache[$index] = $wgContLang->getWeekdayName( gmdate( 'w', $ts ) + 1 );
2495                         case 'currentyear':
2496                                 return $this->mVarCache[$index] = $wgContLang->formatNum( gmdate( 'Y', $ts ), true );
2497                         case 'currenttime':
2498                                 return $this->mVarCache[$index] = $wgContLang->time( wfTimestamp( TS_MW, $ts ), false, false );
2499                         case 'currenthour':
2500                                 return $this->mVarCache[$index] = $wgContLang->formatNum( gmdate( 'H', $ts ), true );
2501                         case 'currentweek':
2502                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2503                                 // int to remove the padding
2504                                 return $this->mVarCache[$index] = $wgContLang->formatNum( (int)gmdate( 'W', $ts ) );
2505                         case 'currentdow':
2506                                 return $this->mVarCache[$index] = $wgContLang->formatNum( gmdate( 'w', $ts ) );
2507                         case 'localdayname':
2508                                 return $this->mVarCache[$index] = $wgContLang->getWeekdayName( $localDayOfWeek + 1 );
2509                         case 'localyear':
2510                                 return $this->mVarCache[$index] = $wgContLang->formatNum( $localYear, true );
2511                         case 'localtime':
2512                                 return $this->mVarCache[$index] = $wgContLang->time( $localTimestamp, false, false );
2513                         case 'localhour':
2514                                 return $this->mVarCache[$index] = $wgContLang->formatNum( $localHour, true );
2515                         case 'localweek':
2516                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2517                                 // int to remove the padding
2518                                 return $this->mVarCache[$index] = $wgContLang->formatNum( (int)$localWeek );
2519                         case 'localdow':
2520                                 return $this->mVarCache[$index] = $wgContLang->formatNum( $localDayOfWeek );
2521                         case 'numberofarticles':
2522                                 return $this->mVarCache[$index] = $wgContLang->formatNum( SiteStats::articles() );
2523                         case 'numberoffiles':
2524                                 return $this->mVarCache[$index] = $wgContLang->formatNum( SiteStats::images() );
2525                         case 'numberofusers':
2526                                 return $this->mVarCache[$index] = $wgContLang->formatNum( SiteStats::users() );
2527                         case 'numberofpages':
2528                                 return $this->mVarCache[$index] = $wgContLang->formatNum( SiteStats::pages() );
2529                         case 'numberofadmins':
2530                                 return $this->mVarCache[$index] = $wgContLang->formatNum( SiteStats::admins() );
2531                         case 'numberofedits':
2532                                 return $this->mVarCache[$index] = $wgContLang->formatNum( SiteStats::edits() );
2533                         case 'currenttimestamp':
2534                                 return $this->mVarCache[$index] = wfTimestamp( TS_MW, $ts );
2535                         case 'localtimestamp':
2536                                 return $this->mVarCache[$index] = $localTimestamp;
2537                         case 'currentversion':
2538                                 return $this->mVarCache[$index] = SpecialVersion::getVersion();
2539                         case 'sitename':
2540                                 return $wgSitename;
2541                         case 'server':
2542                                 return $wgServer;
2543                         case 'servername':
2544                                 return $wgServerName;
2545                         case 'scriptpath':
2546                                 return $wgScriptPath;
2547                         case 'directionmark':
2548                                 return $wgContLang->getDirMark();
2549                         case 'contentlanguage':
2550                                 global $wgContLanguageCode;
2551                                 return $wgContLanguageCode;
2552                         default:
2553                                 $ret = null;
2554                                 if ( wfRunHooks( 'ParserGetVariableValueSwitch', array( &$this, &$this->mVarCache, &$index, &$ret ) ) )
2555                                         return $ret;
2556                                 else
2557                                         return null;
2558                 }
2559         }
2560
2561         /**
2562          * initialise the magic variables (like CURRENTMONTHNAME)
2563          *
2564          * @private
2565          */
2566         function initialiseVariables() {
2567                 $fname = 'Parser::initialiseVariables';
2568                 wfProfileIn( $fname );
2569                 $variableIDs = MagicWord::getVariableIDs();
2570
2571                 $this->mVariables = new MagicWordArray( $variableIDs );
2572                 wfProfileOut( $fname );
2573         }
2574
2575         /**
2576          * Preprocess some wikitext and return the document tree.
2577          * This is the ghost of replace_variables().
2578          *
2579          * @param string $text The text to parse
2580          * @param integer flags Bitwise combination of:
2581          *          self::PTD_FOR_INCLUSION    Handle <noinclude>/<includeonly> as if the text is being
2582          *                                     included. Default is to assume a direct page view.
2583          *
2584          * The generated DOM tree must depend only on the input text and the flags.
2585          * The DOM tree must be the same in OT_HTML and OT_WIKI mode, to avoid a regression of bug 4899.
2586          *
2587          * Any flag added to the $flags parameter here, or any other parameter liable to cause a
2588          * change in the DOM tree for a given text, must be passed through the section identifier
2589          * in the section edit link and thus back to extractSections().
2590          *
2591          * The output of this function is currently only cached in process memory, but a persistent
2592          * cache may be implemented at a later date which takes further advantage of these strict
2593          * dependency requirements.
2594          *
2595          * @private
2596          */
2597         function preprocessToDom ( $text, $flags = 0 ) {
2598                 $dom = $this->getPreprocessor()->preprocessToObj( $text, $flags );
2599                 return $dom;
2600         }
2601
2602         /*
2603          * Return a three-element array: leading whitespace, string contents, trailing whitespace
2604          */
2605         public static function splitWhitespace( $s ) {
2606                 $ltrimmed = ltrim( $s );
2607                 $w1 = substr( $s, 0, strlen( $s ) - strlen( $ltrimmed ) );
2608                 $trimmed = rtrim( $ltrimmed );
2609                 $diff = strlen( $ltrimmed ) - strlen( $trimmed );
2610                 if ( $diff > 0 ) {
2611                         $w2 = substr( $ltrimmed, -$diff );
2612                 } else {
2613                         $w2 = '';
2614                 }
2615                 return array( $w1, $trimmed, $w2 );
2616         }
2617
2618         /**
2619          * Replace magic variables, templates, and template arguments
2620          * with the appropriate text. Templates are substituted recursively,
2621          * taking care to avoid infinite loops.
2622          *
2623          * Note that the substitution depends on value of $mOutputType:
2624          *  self::OT_WIKI: only {{subst:}} templates
2625          *  self::OT_PREPROCESS: templates but not extension tags
2626          *  self::OT_HTML: all templates and extension tags
2627          *
2628          * @param string $tex The text to transform
2629          * @param PPFrame $frame Object describing the arguments passed to the template
2630          * @param bool $argsOnly Only do argument (triple-brace) expansion, not double-brace expansion
2631          * @private
2632          */
2633         function replaceVariables( $text, $frame = false, $argsOnly = false ) {
2634                 # Prevent too big inclusions
2635                 if( strlen( $text ) > $this->mOptions->getMaxIncludeSize() ) {
2636                         return $text;
2637                 }
2638
2639                 $fname = __METHOD__;
2640                 wfProfileIn( $fname );
2641
2642                 if ( $frame === false ) {
2643                         $frame = $this->getPreprocessor()->newFrame();
2644                 } elseif ( !( $frame instanceof PPFrame ) ) {
2645                         throw new MWException( __METHOD__ . ' called using the old argument format' );
2646                 }
2647
2648                 $dom = $this->preprocessToDom( $text );
2649                 $flags = $argsOnly ? PPFrame::NO_TEMPLATES : 0;
2650                 $text = $frame->expand( $dom, $flags );
2651
2652                 wfProfileOut( $fname );
2653                 return $text;
2654         }
2655
2656         /// Clean up argument array - refactored in 1.9 so parserfunctions can use it, too.
2657         static function createAssocArgs( $args ) {
2658                 $assocArgs = array();
2659                 $index = 1;
2660                 foreach( $args as $arg ) {
2661                         $eqpos = strpos( $arg, '=' );
2662                         if ( $eqpos === false ) {
2663                                 $assocArgs[$index++] = $arg;
2664                         } else {
2665                                 $name = trim( substr( $arg, 0, $eqpos ) );
2666                                 $value = trim( substr( $arg, $eqpos+1 ) );
2667                                 if ( $value === false ) {
2668                                         $value = '';
2669                                 }
2670                                 if ( $name !== false ) {
2671                                         $assocArgs[$name] = $value;
2672                                 }
2673                         }
2674                 }
2675
2676                 return $assocArgs;
2677         }
2678
2679         /**
2680          * Return the text of a template, after recursively
2681          * replacing any variables or templates within the template.
2682          *
2683          * @param array $piece The parts of the template
2684          *  $piece['title']: the title, i.e. the part before the |
2685          *  $piece['parts']: the parameter array
2686          *  $piece['lineStart']: whether the brace was at the start of a line
2687          * @param PPFrame The current frame, contains template arguments
2688          * @return string the text of the template
2689          * @private
2690          */
2691         function braceSubstitution( $piece, $frame ) {
2692                 global $wgContLang, $wgLang, $wgAllowDisplayTitle, $wgNonincludableNamespaces;
2693                 $fname = __METHOD__;
2694                 wfProfileIn( $fname );
2695                 wfProfileIn( __METHOD__.'-setup' );
2696
2697                 # Flags
2698                 $found = false;             # $text has been filled
2699                 $nowiki = false;            # wiki markup in $text should be escaped
2700                 $isHTML = false;            # $text is HTML, armour it against wikitext transformation
2701                 $forceRawInterwiki = false; # Force interwiki transclusion to be done in raw mode not rendered
2702                 $isChildObj = false;        # $text is a DOM node needing expansion in a child frame
2703                 $isLocalObj = false;        # $text is a DOM node needing expansion in the current frame
2704
2705                 # Title object, where $text came from
2706                 $title = NULL;
2707
2708                 # $part1 is the bit before the first |, and must contain only title characters.
2709                 # Various prefixes will be stripped from it later.
2710                 $titleWithSpaces = $frame->expand( $piece['title'] );
2711                 $part1 = trim( $titleWithSpaces );
2712                 $titleText = false;
2713
2714                 # Original title text preserved for various purposes
2715                 $originalTitle = $part1;
2716
2717                 # $args is a list of argument nodes, starting from index 0, not including $part1
2718                 $args = (null == $piece['parts']) ? array() : $piece['parts'];
2719                 wfProfileOut( __METHOD__.'-setup' );
2720
2721                 # SUBST
2722                 wfProfileIn( __METHOD__.'-modifiers' );
2723                 if ( !$found ) {
2724                         $mwSubst =& MagicWord::get( 'subst' );
2725                         if ( $mwSubst->matchStartAndRemove( $part1 ) xor $this->ot['wiki'] ) {
2726                                 # One of two possibilities is true:
2727                                 # 1) Found SUBST but not in the PST phase
2728                                 # 2) Didn't find SUBST and in the PST phase
2729                                 # In either case, return without further processing
2730                                 $text = $frame->virtualBracketedImplode( '{{', '|', '}}', $titleWithSpaces, $args );
2731                                 $isLocalObj = true;
2732                                 $found = true;
2733                         }
2734                 }
2735
2736                 # Variables
2737                 if ( !$found && $args->getLength() == 0 ) {
2738                         $id = $this->mVariables->matchStartToEnd( $part1 );
2739                         if ( $id !== false ) {
2740                                 $text = $this->getVariableValue( $id );
2741                                 if (MagicWord::getCacheTTL($id)>-1)
2742                                         $this->mOutput->mContainsOldMagic = true;
2743                                 $found = true;
2744                         }
2745                 }
2746
2747                 # MSG, MSGNW and RAW
2748                 if ( !$found ) {
2749                         # Check for MSGNW:
2750                         $mwMsgnw =& MagicWord::get( 'msgnw' );
2751                         if ( $mwMsgnw->matchStartAndRemove( $part1 ) ) {
2752                                 $nowiki = true;
2753                         } else {
2754                                 # Remove obsolete MSG:
2755                                 $mwMsg =& MagicWord::get( 'msg' );
2756                                 $mwMsg->matchStartAndRemove( $part1 );
2757                         }
2758
2759                         # Check for RAW:
2760                         $mwRaw =& MagicWord::get( 'raw' );
2761                         if ( $mwRaw->matchStartAndRemove( $part1 ) ) {
2762                                 $forceRawInterwiki = true;
2763                         }
2764                 }
2765                 wfProfileOut( __METHOD__.'-modifiers' );
2766
2767                 # Parser functions
2768                 if ( !$found ) {
2769                         wfProfileIn( __METHOD__ . '-pfunc' );
2770
2771                         $colonPos = strpos( $part1, ':' );
2772                         if ( $colonPos !== false ) {
2773                                 # Case sensitive functions
2774                                 $function = substr( $part1, 0, $colonPos );
2775                                 if ( isset( $this->mFunctionSynonyms[1][$function] ) ) {
2776                                         $function = $this->mFunctionSynonyms[1][$function];
2777                                 } else {
2778                                         # Case insensitive functions
2779                                         $function = strtolower( $function );
2780                                         if ( isset( $this->mFunctionSynonyms[0][$function] ) ) {
2781                                                 $function = $this->mFunctionSynonyms[0][$function];
2782                                         } else {
2783                                                 $function = false;
2784                                         }
2785                                 }
2786                                 if ( $function ) {
2787                                         list( $callback, $flags ) = $this->mFunctionHooks[$function];
2788                                         $initialArgs = array( &$this );
2789                                         $funcArgs = array( trim( substr( $part1, $colonPos + 1 ) ) );
2790                                         if ( $flags & SFH_OBJECT_ARGS ) {
2791                                                 # Add a frame parameter, and pass the arguments as an array
2792                                                 $allArgs = $initialArgs;
2793                                                 $allArgs[] = $frame;
2794                                                 for ( $i = 0; $i < $args->getLength(); $i++ ) {
2795                                                         $funcArgs[] = $args->item( $i );
2796                                                 }
2797                                                 $allArgs[] = $funcArgs;
2798                                         } else {
2799                                                 # Convert arguments to plain text
2800                                                 for ( $i = 0; $i < $args->getLength(); $i++ ) {
2801                                                         $funcArgs[] = trim( $frame->expand( $args->item( $i ) ) );
2802                                                 }
2803                                                 $allArgs = array_merge( $initialArgs, $funcArgs );
2804                                         }
2805
2806                                         # Workaround for PHP bug 35229 and similar
2807                                         if ( !is_callable( $callback ) ) {
2808                                                 throw new MWException( "Tag hook for $name is not callable\n" );
2809                                         }
2810                                         $result = call_user_func_array( $callback, $allArgs );
2811                                         $found = true;
2812
2813                                         if ( is_array( $result ) ) {
2814                                                 if ( isset( $result[0] ) ) {
2815                                                         $text = $result[0];
2816                                                         unset( $result[0] );
2817                                                 }
2818
2819                                                 // Extract flags into the local scope
2820                                                 // This allows callers to set flags such as nowiki, found, etc.
2821                                                 extract( $result );
2822                                         } else {
2823                                                 $text = $result;
2824                                         }
2825                                 }
2826                         }
2827                         wfProfileOut( __METHOD__ . '-pfunc' );
2828                 }
2829
2830                 # Finish mangling title and then check for loops.
2831                 # Set $title to a Title object and $titleText to the PDBK
2832                 if ( !$found ) {
2833                         $ns = NS_TEMPLATE;
2834                         # Split the title into page and subpage
2835                         $subpage = '';
2836                         $part1 = $this->maybeDoSubpageLink( $part1, $subpage );
2837                         if ($subpage !== '') {
2838                                 $ns = $this->mTitle->getNamespace();
2839                         }
2840                         $title = Title::newFromText( $part1, $ns );
2841                         if ( $title ) {
2842                                 $titleText = $title->getPrefixedText();
2843                                 # Check for language variants if the template is not found
2844                                 if($wgContLang->hasVariants() && $title->getArticleID() == 0){
2845                                         $wgContLang->findVariantLink($part1, $title);
2846                                 }
2847                                 # Do infinite loop check
2848                                 if ( !$frame->loopCheck( $title ) ) {
2849                                         $found = true;
2850                                         $text = "<span class=\"error\">Template loop detected: [[$titleText]]</span>";
2851                                         wfDebug( __METHOD__.": template loop broken at '$titleText'\n" );
2852                                 }
2853                                 # Do recursion depth check
2854                                 $limit = $this->mOptions->getMaxTemplateDepth();
2855                                 if ( $frame->depth >= $limit ) {
2856                                         $found = true;
2857                                         $text = "<span class=\"error\">Template recursion depth limit exceeded ($limit)</span>";
2858                                 }
2859                         }
2860                 }
2861
2862                 # Load from database
2863                 if ( !$found && $title ) {
2864                         wfProfileIn( __METHOD__ . '-loadtpl' );
2865                         if ( !$title->isExternal() ) {
2866                                 if ( $title->getNamespace() == NS_SPECIAL && $this->mOptions->getAllowSpecialInclusion() && $this->ot['html'] ) {
2867                                         $text = SpecialPage::capturePath( $title );
2868                                         if ( is_string( $text ) ) {
2869                                                 $found = true;
2870                                                 $isHTML = true;
2871                                                 $this->disableCache();
2872                                         }
2873                                 } else if ( $wgNonincludableNamespaces && in_array( $title->getNamespace(), $wgNonincludableNamespaces ) ) {
2874                                         $found = false; //access denied
2875                                         wfDebug( "$fname: template inclusion denied for " . $title->getPrefixedDBkey() );
2876                                 } else {
2877                                         list( $text, $title ) = $this->getTemplateDom( $title );
2878                                         if ( $text !== false ) {
2879                                                 $found = true;
2880                                                 $isChildObj = true;
2881                                         }
2882                                 }
2883
2884                                 # If the title is valid but undisplayable, make a link to it
2885                                 if ( !$found && ( $this->ot['html'] || $this->ot['pre'] ) ) {
2886                                         $text = "[[:$titleText]]";
2887                                         $found = true;
2888                                 }
2889                         } elseif ( $title->isTrans() ) {
2890                                 // Interwiki transclusion
2891                                 if ( $this->ot['html'] && !$forceRawInterwiki ) {
2892                                         $text = $this->interwikiTransclude( $title, 'render' );
2893                                         $isHTML = true;
2894                                 } else {
2895                                         $text = $this->interwikiTransclude( $title, 'raw' );
2896                                         // Preprocess it like a template
2897                                         $text = $this->preprocessToDom( $text, self::PTD_FOR_INCLUSION );
2898                                         $isChildObj = true;
2899                                 }
2900                                 $found = true;
2901                         }
2902                         wfProfileOut( __METHOD__ . '-loadtpl' );
2903                 }
2904
2905                 # If we haven't found text to substitute by now, we're done
2906                 # Recover the source wikitext and return it
2907                 if ( !$found ) {
2908                         $text = $frame->virtualBracketedImplode( '{{', '|', '}}', $titleWithSpaces, $args );
2909                         wfProfileOut( $fname );
2910                         return array( 'object' => $text );
2911                 }
2912
2913                 # Expand DOM-style return values in a child frame
2914                 if ( $isChildObj ) {
2915                         # Clean up argument array
2916                         $newFrame = $frame->newChild( $args, $title );
2917
2918                         if ( $nowiki ) {
2919                                 $text = $newFrame->expand( $text, PPFrame::RECOVER_ORIG );
2920                         } elseif ( $titleText !== false && $newFrame->isEmpty() ) {
2921                                 # Expansion is eligible for the empty-frame cache
2922                                 if ( isset( $this->mTplExpandCache[$titleText] ) ) {
2923                                         $text = $this->mTplExpandCache[$titleText];
2924                                 } else {
2925                                         $text = $newFrame->expand( $text );
2926                                         $this->mTplExpandCache[$titleText] = $text;
2927                                 }
2928                         } else {
2929                                 # Uncached expansion
2930                                 $text = $newFrame->expand( $text );
2931                         }
2932                 }
2933                 if ( $isLocalObj && $nowiki ) {
2934                         $text = $frame->expand( $text, PPFrame::RECOVER_ORIG );
2935                         $isLocalObj = false;
2936                 }
2937
2938                 # Replace raw HTML by a placeholder
2939                 # Add a blank line preceding, to prevent it from mucking up
2940                 # immediately preceding headings
2941                 if ( $isHTML ) {
2942                         $text = "\n\n" . $this->insertStripItem( $text );
2943                 }
2944                 # Escape nowiki-style return values
2945                 elseif ( $nowiki && ( $this->ot['html'] || $this->ot['pre'] ) ) {
2946                         $text = wfEscapeWikiText( $text );
2947                 }
2948                 # Bug 529: if the template begins with a table or block-level
2949                 # element, it should be treated as beginning a new line.
2950                 # This behaviour is somewhat controversial.
2951                 elseif ( is_string( $text ) && !$piece['lineStart'] && preg_match('/^(?:{\\||:|;|#|\*)/', $text)) /*}*/{
2952                         $text = "\n" . $text;
2953                 }
2954
2955                 if ( is_string( $text ) && !$this->incrementIncludeSize( 'post-expand', strlen( $text ) ) ) {
2956                         # Error, oversize inclusion
2957                         $text = "[[$originalTitle]]" .
2958                                 $this->insertStripItem( '<!-- WARNING: template omitted, post-expand include size too large -->' );
2959                 }
2960
2961                 if ( $isLocalObj ) {
2962                         $ret = array( 'object' => $text );
2963                 } else {
2964                         $ret = array( 'text' => $text );
2965                 }
2966
2967                 wfProfileOut( $fname );
2968                 return $ret;
2969         }
2970
2971         /**
2972          * Get the semi-parsed DOM representation of a template with a given title,
2973          * and its redirect destination title. Cached.
2974          */
2975         function getTemplateDom( $title ) {
2976                 $cacheTitle = $title;
2977                 $titleText = $title->getPrefixedDBkey();
2978
2979                 if ( isset( $this->mTplRedirCache[$titleText] ) ) {
2980                         list( $ns, $dbk ) = $this->mTplRedirCache[$titleText];
2981                         $title = Title::makeTitle( $ns, $dbk );
2982                         $titleText = $title->getPrefixedDBkey();
2983                 }
2984                 if ( isset( $this->mTplDomCache[$titleText] ) ) {
2985                         return array( $this->mTplDomCache[$titleText], $title );
2986                 }
2987
2988                 // Cache miss, go to the database
2989                 list( $text, $title ) = $this->fetchTemplateAndTitle( $title );
2990
2991                 if ( $text === false ) {
2992                         $this->mTplDomCache[$titleText] = false;
2993                         return array( false, $title );
2994                 }
2995
2996                 $dom = $this->preprocessToDom( $text, self::PTD_FOR_INCLUSION );
2997                 $this->mTplDomCache[ $titleText ] = $dom;
2998
2999                 if (! $title->equals($cacheTitle)) {
3000                         $this->mTplRedirCache[$cacheTitle->getPrefixedDBkey()] =
3001                                 array( $title->getNamespace(),$cdb = $title->getDBkey() );
3002                 }
3003
3004                 return array( $dom, $title );
3005         }
3006
3007         /**
3008          * Fetch the unparsed text of a template and register a reference to it.
3009          */
3010         function fetchTemplateAndTitle( $title ) {
3011                 $templateCb = $this->mOptions->getTemplateCallback();
3012                 $stuff = call_user_func( $templateCb, $title );
3013                 $text = $stuff['text'];
3014                 $finalTitle = isset( $stuff['finalTitle'] ) ? $stuff['finalTitle'] : $title;
3015                 if ( isset( $stuff['deps'] ) ) {
3016                         foreach ( $stuff['deps'] as $dep ) {
3017                                 $this->mOutput->addTemplate( $dep['title'], $dep['page_id'], $dep['rev_id'] );
3018                         }
3019                 }
3020                 return array($text,$finalTitle);
3021         }
3022
3023         function fetchTemplate( $title ) {
3024                 $rv = $this->fetchTemplateAndTitle($title);
3025                 return $rv[0];
3026         }
3027
3028         /**
3029          * Static function to get a template
3030          * Can be overridden via ParserOptions::setTemplateCallback().
3031          */
3032         static function statelessFetchTemplate( $title ) {
3033                 $text = $skip = false;
3034                 $finalTitle = $title;
3035                 $deps = array();
3036
3037                 // Loop to fetch the article, with up to 1 redirect
3038                 for ( $i = 0; $i < 2 && is_object( $title ); $i++ ) {
3039                         # Give extensions a chance to select the revision instead
3040                         $id = false; // Assume current
3041                         wfRunHooks( 'BeforeParserFetchTemplateAndtitle', array( false, &$title, &$skip, &$id ) );
3042
3043                         if( $skip ) {
3044                                 $text = false;
3045                                 $deps[] = array(
3046                                         'title' => $title,
3047                                         'page_id' => $title->getArticleID(),
3048                                         'rev_id' => null );
3049                                 break;
3050                         }
3051                         $rev = $id ? Revision::newFromId( $id ) : Revision::newFromTitle( $title );
3052                         $rev_id = $rev ? $rev->getId() : 0;
3053
3054                         $deps[] = array(
3055                                 'title' => $title,
3056                                 'page_id' => $title->getArticleID(),
3057                                 'rev_id' => $rev_id );
3058
3059                         if( $rev ) {
3060                                 $text = $rev->getText();
3061                         } elseif( $title->getNamespace() == NS_MEDIAWIKI ) {
3062                                 global $wgLang;
3063                                 $message = $wgLang->lcfirst( $title->getText() );
3064                                 $text = wfMsgForContentNoTrans( $message );
3065                                 if( wfEmptyMsg( $message, $text ) ) {
3066                                         $text = false;
3067                                         break;
3068                                 }
3069                         } else {
3070                                 break;
3071                         }
3072                         if ( $text === false ) {
3073                                 break;
3074                         }
3075                         // Redirect?
3076                         $finalTitle = $title;
3077                         $title = Title::newFromRedirect( $text );
3078                 }
3079                 return array(
3080                         'text' => $text,
3081                         'finalTitle' => $finalTitle,
3082                         'deps' => $deps );
3083         }
3084
3085         /**
3086          * Transclude an interwiki link.
3087          */
3088         function interwikiTransclude( $title, $action ) {
3089                 global $wgEnableScaryTranscluding;
3090
3091                 if (!$wgEnableScaryTranscluding)
3092                         return wfMsg('scarytranscludedisabled');
3093
3094                 $url = $title->getFullUrl( "action=$action" );
3095
3096                 if (strlen($url) > 255)
3097                         return wfMsg('scarytranscludetoolong');
3098                 return $this->fetchScaryTemplateMaybeFromCache($url);
3099         }
3100
3101         function fetchScaryTemplateMaybeFromCache($url) {
3102                 global $wgTranscludeCacheExpiry;
3103                 $dbr = wfGetDB(DB_SLAVE);
3104                 $obj = $dbr->selectRow('transcache', array('tc_time', 'tc_contents'),
3105                                 array('tc_url' => $url));
3106                 if ($obj) {
3107                         $time = $obj->tc_time;
3108                         $text = $obj->tc_contents;
3109                         if ($time && time() < $time + $wgTranscludeCacheExpiry ) {
3110                                 return $text;
3111                         }
3112                 }
3113
3114                 $text = Http::get($url);
3115                 if (!$text)
3116                         return wfMsg('scarytranscludefailed', $url);
3117
3118                 $dbw = wfGetDB(DB_MASTER);
3119                 $dbw->replace('transcache', array('tc_url'), array(
3120                         'tc_url' => $url,
3121                         'tc_time' => time(),
3122                         'tc_contents' => $text));
3123                 return $text;
3124         }
3125
3126
3127         /**
3128          * Triple brace replacement -- used for template arguments
3129          * @private
3130          */
3131         function argSubstitution( $piece, $frame ) {
3132                 wfProfileIn( __METHOD__ );
3133
3134                 $error = false;
3135                 $parts = $piece['parts'];
3136                 $nameWithSpaces = $frame->expand( $piece['title'] );
3137                 $argName = trim( $nameWithSpaces );
3138                 $object = false;
3139                 $text = $frame->getArgument( $argName );
3140                 if (  $text === false && $parts->getLength() > 0
3141                   && (
3142                     $this->ot['html']
3143                     || $this->ot['pre']
3144                     || ( $this->ot['wiki'] && $frame->isTemplate() )
3145                   )
3146                 ) {
3147                         # No match in frame, use the supplied default
3148                         $object = $parts->item( 0 )->getChildren();
3149                 }
3150                 if ( !$this->incrementIncludeSize( 'arg', strlen( $text ) ) ) {
3151                         $error = '<!-- WARNING: argument omitted, expansion size too large -->';
3152                 }
3153
3154                 if ( $text === false && $object === false ) {
3155                         # No match anywhere
3156                         $object = $frame->virtualBracketedImplode( '{{{', '|', '}}}', $nameWithSpaces, $parts );
3157                 }
3158                 if ( $error !== false ) {
3159                         $text .= $error;
3160                 }
3161                 if ( $object !== false ) {
3162                         $ret = array( 'object' => $object );
3163                 } else {
3164                         $ret = array( 'text' => $text );
3165                 }
3166
3167                 wfProfileOut( __METHOD__ );
3168                 return $ret;
3169         }
3170
3171         /**
3172          * Return the text to be used for a given extension tag.
3173          * This is the ghost of strip().
3174          *
3175          * @param array $params Associative array of parameters:
3176          *     name       PPNode for the tag name
3177          *     attr       PPNode for unparsed text where tag attributes are thought to be
3178          *     attributes Optional associative array of parsed attributes
3179          *     inner      Contents of extension element
3180          *     noClose    Original text did not have a close tag
3181          * @param PPFrame $frame
3182          */
3183         function extensionSubstitution( $params, $frame ) {
3184                 global $wgRawHtml, $wgContLang;
3185
3186                 $name = $frame->expand( $params['name'] );
3187                 $attrText = !isset( $params['attr'] ) ? null : $frame->expand( $params['attr'] );
3188                 $content = !isset( $params['inner'] ) ? null : $frame->expand( $params['inner'] );
3189
3190                 $marker = "{$this->mUniqPrefix}-$name-" . sprintf('%08X', $this->mMarkerIndex++) . self::MARKER_SUFFIX;
3191
3192                 if ( $this->ot['html'] ) {
3193                         $name = strtolower( $name );
3194
3195                         $attributes = Sanitizer::decodeTagAttributes( $attrText );
3196                         if ( isset( $params['attributes'] ) ) {
3197                                 $attributes = $attributes + $params['attributes'];
3198                         }
3199                         switch ( $name ) {
3200                                 case 'html':
3201                                         if( $wgRawHtml ) {
3202                                                 $output = $content;
3203                                                 break;
3204                                         } else {
3205                                                 throw new MWException( '<html> extension tag encountered unexpectedly' );
3206                                         }
3207                                 case 'nowiki':
3208                                         $output = Xml::escapeTagsOnly( $content );
3209                                         break;
3210                                 case 'math':
3211                                         $output = $wgContLang->armourMath(
3212                                                 MathRenderer::renderMath( $content, $attributes ) );
3213                                         break;
3214                                 case 'gallery':
3215                                         $output = $this->renderImageGallery( $content, $attributes );
3216                                         break;
3217                                 default:
3218                                         if( isset( $this->mTagHooks[$name] ) ) {
3219                                                 # Workaround for PHP bug 35229 and similar
3220                                                 if ( !is_callable( $this->mTagHooks[$name] ) ) {
3221                                                         throw new MWException( "Tag hook for $name is not callable\n" );
3222                                                 }
3223                                                 $output = call_user_func_array( $this->mTagHooks[$name],
3224                                                         array( $content, $attributes, $this ) );
3225                                         } else {
3226                                                 throw new MWException( "Invalid call hook $name" );
3227                                         }
3228                         }
3229                 } else {
3230                         if ( is_null( $attrText ) ) {
3231                                 $attrText = '';
3232                         }
3233                         if ( isset( $params['attributes'] ) ) {
3234                                 foreach ( $params['attributes'] as $attrName => $attrValue ) {
3235                                         $attrText .= ' ' . htmlspecialchars( $attrName ) . '="' .
3236                                                 htmlspecialchars( $attrValue ) . '"';
3237                                 }
3238                         }
3239                         if ( $content === null ) {
3240                                 $output = "<$name$attrText/>";
3241                         } else {
3242                                 $close = is_null( $params['close'] ) ? '' : $frame->expand( $params['close'] );
3243                                 $output = "<$name$attrText>$content$close";
3244                         }
3245                 }
3246
3247                 if ( $name == 'html' || $name == 'nowiki' ) {
3248                         $this->mStripState->nowiki->setPair( $marker, $output );
3249                 } else {
3250                         $this->mStripState->general->setPair( $marker, $output );
3251                 }
3252                 return $marker;
3253         }
3254
3255         /**
3256          * Increment an include size counter
3257          *
3258          * @param string $type The type of expansion
3259          * @param integer $size The size of the text
3260          * @return boolean False if this inclusion would take it over the maximum, true otherwise
3261          */
3262         function incrementIncludeSize( $type, $size ) {
3263                 if ( $this->mIncludeSizes[$type] + $size > $this->mOptions->getMaxIncludeSize( $type ) ) {
3264                         return false;
3265                 } else {
3266                         $this->mIncludeSizes[$type] += $size;
3267                         return true;
3268                 }
3269         }
3270
3271         /**
3272          * Strip double-underscore items like __NOGALLERY__ and __NOTOC__
3273          * Fills $this->mDoubleUnderscores, returns the modified text
3274          */
3275         function doDoubleUnderscore( $text ) {
3276                 // The position of __TOC__ needs to be recorded
3277                 $mw = MagicWord::get( 'toc' );
3278                 if( $mw->match( $text ) ) {
3279                         $this->mShowToc = true;
3280                         $this->mForceTocPosition = true;
3281
3282                         // Set a placeholder. At the end we'll fill it in with the TOC.
3283                         $text = $mw->replace( '<!--MWTOC-->', $text, 1 );
3284
3285                         // Only keep the first one.
3286                         $text = $mw->replace( '', $text );
3287                 }
3288
3289                 // Now match and remove the rest of them
3290                 $mwa = MagicWord::getDoubleUnderscoreArray();
3291                 $this->mDoubleUnderscores = $mwa->matchAndRemove( $text );
3292
3293                 if ( isset( $this->mDoubleUnderscores['nogallery'] ) ) {
3294                         $this->mOutput->mNoGallery = true;
3295                 }
3296                 if ( isset( $this->mDoubleUnderscores['notoc'] ) && !$this->mForceTocPosition ) {
3297                         $this->mShowToc = false;
3298                 }
3299                 if ( isset( $this->mDoubleUnderscores['hiddencat'] ) && $this->mTitle->getNamespace() == NS_CATEGORY ) {
3300                         $this->mOutput->setProperty( 'hiddencat', 'y' );
3301
3302                         $containerCategory = Title::makeTitleSafe( NS_CATEGORY, wfMsgForContent( 'hidden-category-category' ) );
3303                         if ( $containerCategory ) {
3304                                 $this->mOutput->addCategory( $containerCategory->getDBkey(), $this->getDefaultSort() );
3305                         } else {
3306                                 wfDebug( __METHOD__.": [[MediaWiki:hidden-category-category]] is not a valid title!\n" );
3307                         }
3308                 }
3309                 return $text;
3310         }
3311
3312         /**
3313          * This function accomplishes several tasks:
3314          * 1) Auto-number headings if that option is enabled
3315          * 2) Add an [edit] link to sections for users who have enabled the option and can edit the page
3316          * 3) Add a Table of contents on the top for users who have enabled the option
3317          * 4) Auto-anchor headings
3318          *
3319          * It loops through all headlines, collects the necessary data, then splits up the
3320          * string and re-inserts the newly formatted headlines.
3321          *
3322          * @param string $text
3323          * @param boolean $isMain
3324          * @private
3325          */
3326         function formatHeadings( $text, $isMain=true ) {
3327                 global $wgMaxTocLevel, $wgContLang;
3328
3329                 $doNumberHeadings = $this->mOptions->getNumberHeadings();
3330                 if( !$this->mTitle->quickUserCan( 'edit' ) ) {
3331                         $showEditLink = 0;
3332                 } else {
3333                         $showEditLink = $this->mOptions->getEditSection();
3334                 }
3335
3336                 # Inhibit editsection links if requested in the page
3337                 if ( isset( $this->mDoubleUnderscores['noeditsection'] ) ) {
3338                         $showEditLink = 0;
3339                 }
3340
3341                 # Get all headlines for numbering them and adding funky stuff like [edit]
3342                 # links - this is for later, but we need the number of headlines right now
3343                 $matches = array();
3344                 $numMatches = preg_match_all( '/<H(?P<level>[1-6])(?P<attrib>.*?'.'>)(?P<header>.*?)<\/H[1-6] *>/i', $text, $matches );
3345
3346                 # if there are fewer than 4 headlines in the article, do not show TOC
3347                 # unless it's been explicitly enabled.
3348                 $enoughToc = $this->mShowToc &&
3349                         (($numMatches >= 4) || $this->mForceTocPosition);
3350
3351                 # Allow user to stipulate that a page should have a "new section"
3352                 # link added via __NEWSECTIONLINK__
3353                 if ( isset( $this->mDoubleUnderscores['newsectionlink'] ) ) {
3354                         $this->mOutput->setNewSection( true );
3355                 }
3356
3357                 # if the string __FORCETOC__ (not case-sensitive) occurs in the HTML,
3358                 # override above conditions and always show TOC above first header
3359                 if ( isset( $this->mDoubleUnderscores['forcetoc'] ) ) {
3360                         $this->mShowToc = true;
3361                         $enoughToc = true;
3362                 }
3363
3364                 # We need this to perform operations on the HTML
3365                 $sk = $this->mOptions->getSkin();
3366
3367                 # headline counter
3368                 $headlineCount = 0;
3369                 $numVisible = 0;
3370
3371                 # Ugh .. the TOC should have neat indentation levels which can be
3372                 # passed to the skin functions. These are determined here
3373                 $toc = '';
3374                 $full = '';
3375                 $head = array();
3376                 $sublevelCount = array();
3377                 $levelCount = array();
3378                 $toclevel = 0;
3379                 $level = 0;
3380                 $prevlevel = 0;
3381                 $toclevel = 0;
3382                 $prevtoclevel = 0;
3383                 $markerRegex = "{$this->mUniqPrefix}-h-(\d+)-" . self::MARKER_SUFFIX;
3384                 $baseTitleText = $this->mTitle->getPrefixedDBkey();
3385                 $tocraw = array();
3386
3387                 foreach( $matches[3] as $headline ) {
3388                         $isTemplate = false;
3389                         $titleText = false;
3390                         $sectionIndex = false;
3391                         $numbering = '';
3392                         $markerMatches = array();
3393                         if (preg_match("/^$markerRegex/", $headline, $markerMatches)) {
3394                                 $serial = $markerMatches[1];
3395                                 list( $titleText, $sectionIndex ) = $this->mHeadings[$serial];
3396                                 $isTemplate = ($titleText != $baseTitleText);
3397                                 $headline = preg_replace("/^$markerRegex/", "", $headline);
3398                         }
3399
3400                         if( $toclevel ) {
3401                                 $prevlevel = $level;
3402                                 $prevtoclevel = $toclevel;
3403                         }
3404                         $level = $matches[1][$headlineCount];
3405
3406                         if( $doNumberHeadings || $enoughToc ) {
3407
3408                                 if ( $level > $prevlevel ) {
3409                                         # Increase TOC level
3410                                         $toclevel++;
3411                                         $sublevelCount[$toclevel] = 0;
3412                                         if( $toclevel<$wgMaxTocLevel ) {
3413                                                 $prevtoclevel = $toclevel;
3414                                                 $toc .= $sk->tocIndent();
3415                                                 $numVisible++;
3416                                         }
3417                                 }
3418                                 elseif ( $level < $prevlevel && $toclevel > 1 ) {
3419                                         # Decrease TOC level, find level to jump to
3420
3421                                         if ( $toclevel == 2 && $level <= $levelCount[1] ) {
3422                                                 # Can only go down to level 1
3423                                                 $toclevel = 1;
3424                                         } else {
3425                                                 for ($i = $toclevel; $i > 0; $i--) {
3426                                                         if ( $levelCount[$i] == $level ) {
3427                                                                 # Found last matching level
3428                                                                 $toclevel = $i;
3429                                                                 break;
3430                                                         }
3431                                                         elseif ( $levelCount[$i] < $level ) {
3432                                                                 # Found first matching level below current level
3433                                                                 $toclevel = $i + 1;
3434                                                                 break;
3435                                                         }
3436                                                 }
3437                                         }
3438                                         if( $toclevel<$wgMaxTocLevel ) {
3439                                                 if($prevtoclevel < $wgMaxTocLevel) {
3440                                                         # Unindent only if the previous toc level was shown :p
3441                                                         $toc .= $sk->tocUnindent( $prevtoclevel - $toclevel );
3442                                                         $prevtoclevel = $toclevel;
3443                                                 } else {
3444                                                         $toc .= $sk->tocLineEnd();
3445                                                 }
3446                                         }
3447                                 }
3448                                 else {
3449                                         # No change in level, end TOC line
3450                                         if( $toclevel<$wgMaxTocLevel ) {
3451                                                 $toc .= $sk->tocLineEnd();
3452                                         }
3453                                 }
3454
3455                                 $levelCount[$toclevel] = $level;
3456
3457                                 # count number of headlines for each level
3458                                 @$sublevelCount[$toclevel]++;
3459                                 $dot = 0;
3460                                 for( $i = 1; $i <= $toclevel; $i++ ) {
3461                                         if( !empty( $sublevelCount[$i] ) ) {
3462                                                 if( $dot ) {
3463                                                         $numbering .= '.';
3464                                                 }
3465                                                 $numbering .= $wgContLang->formatNum( $sublevelCount[$i] );
3466                                                 $dot = 1;
3467                                         }
3468                                 }
3469                         }
3470
3471                         # The safe header is a version of the header text safe to use for links
3472                         # Avoid insertion of weird stuff like <math> by expanding the relevant sections
3473                         $safeHeadline = $this->mStripState->unstripBoth( $headline );
3474
3475                         # Remove link placeholders by the link text.
3476                         #     <!--LINK number-->
3477                         # turns into
3478                         #     link text with suffix
3479                         $safeHeadline = preg_replace( '/<!--LINK ([0-9]*)-->/e',
3480                                                             "\$this->mLinkHolders['texts'][\$1]",
3481                                                             $safeHeadline );
3482                         $safeHeadline = preg_replace( '/<!--IWLINK ([0-9]*)-->/e',
3483                                                             "\$this->mInterwikiLinkHolders['texts'][\$1]",
3484                                                             $safeHeadline );
3485
3486                         # Strip out HTML (other than plain <sup> and <sub>: bug 8393)
3487                         $tocline = preg_replace(
3488                                 array( '#<(?!/?(sup|sub)).*?'.'>#', '#<(/?(sup|sub)).*?'.'>#' ),
3489                                 array( '',                          '<$1>'),
3490                                 $safeHeadline
3491                         );
3492                         $tocline = trim( $tocline );
3493
3494                         # For the anchor, strip out HTML-y stuff period
3495                         $safeHeadline = preg_replace( '/<.*?'.'>/', '', $safeHeadline );
3496                         $safeHeadline = trim( $safeHeadline );
3497
3498                         # Save headline for section edit hint before it's escaped
3499                         $headlineHint = $safeHeadline;
3500                         $safeHeadline = Sanitizer::escapeId( $safeHeadline );
3501                         # HTML names must be case-insensitively unique (bug 10721)
3502                         $arrayKey = strtolower( $safeHeadline );
3503
3504                         # XXX : Is $refers[$headlineCount] ever accessed, actually ?
3505                         $refers[$headlineCount] = $safeHeadline;
3506
3507                         # count how many in assoc. array so we can track dupes in anchors
3508                         isset( $refers[$arrayKey] ) ? $refers[$arrayKey]++ : $refers[$arrayKey] = 1;
3509                         $refcount[$headlineCount] = $refers[$arrayKey];
3510
3511                         # Don't number the heading if it is the only one (looks silly)
3512                         if( $doNumberHeadings && count( $matches[3] ) > 1) {
3513                                 # the two are different if the line contains a link
3514                                 $headline=$numbering . ' ' . $headline;
3515                         }
3516
3517                         # Create the anchor for linking from the TOC to the section
3518                         $anchor = $safeHeadline;
3519                         if($refcount[$headlineCount] > 1 ) {
3520                                 $anchor .= '_' . $refcount[$headlineCount];
3521                         }
3522                         if( $enoughToc && ( !isset($wgMaxTocLevel) || $toclevel<$wgMaxTocLevel ) ) {
3523                                 $toc .= $sk->tocLine($anchor, $tocline, $numbering, $toclevel);
3524                                 $tocraw[] = array( 'toclevel' => $toclevel, 'level' => $level, 'line' => $tocline, 'number' => $numbering );
3525                         }
3526                         # give headline the correct <h#> tag
3527                         if( $showEditLink && $sectionIndex !== false ) {
3528                                 if( $isTemplate ) {
3529                                         # Put a T flag in the section identifier, to indicate to extractSections()
3530                                         # that sections inside <includeonly> should be counted.
3531                                         $editlink = $sk->editSectionLinkForOther($titleText, "T-$sectionIndex");
3532                                 } else {
3533                                         $editlink = $sk->editSectionLink($this->mTitle, $sectionIndex, $headlineHint);
3534                                 }
3535                         } else {
3536                                 $editlink = '';
3537                         }
3538                         $head[$headlineCount] = $sk->makeHeadline( $level, $matches['attrib'][$headlineCount], $anchor, $headline, $editlink );
3539
3540                         $headlineCount++;
3541                 }
3542
3543                 $this->mOutput->setSections( $tocraw );
3544
3545                 # Never ever show TOC if no headers
3546                 if( $numVisible < 1 ) {
3547                         $enoughToc = false;
3548                 }
3549
3550                 if( $enoughToc ) {
3551                         if( $prevtoclevel > 0 && $prevtoclevel < $wgMaxTocLevel ) {
3552                                 $toc .= $sk->tocUnindent( $prevtoclevel - 1 );
3553                         }
3554                         $toc = $sk->tocList( $toc );
3555                 }
3556
3557                 # split up and insert constructed headlines
3558
3559                 $blocks = preg_split( '/<H[1-6].*?' . '>.*?<\/H[1-6]>/i', $text );
3560                 $i = 0;
3561
3562                 foreach( $blocks as $block ) {
3563                         if( $showEditLink && $headlineCount > 0 && $i == 0 && $block != "\n" ) {
3564                                 # This is the [edit] link that appears for the top block of text when
3565                                 # section editing is enabled
3566
3567                                 # Disabled because it broke block formatting
3568                                 # For example, a bullet point in the top line
3569                                 # $full .= $sk->editSectionLink(0);
3570                         }
3571                         $full .= $block;
3572                         if( $enoughToc && !$i && $isMain && !$this->mForceTocPosition ) {
3573                                 # Top anchor now in skin
3574                                 $full = $full.$toc;
3575                         }
3576
3577                         if( !empty( $head[$i] ) ) {
3578                                 $full .= $head[$i];
3579                         }
3580                         $i++;
3581                 }
3582                 if( $this->mForceTocPosition ) {
3583                         return str_replace( '<!--MWTOC-->', $toc, $full );
3584                 } else {
3585                         return $full;
3586                 }
3587         }
3588
3589         /**
3590          * Transform wiki markup when saving a page by doing \r\n -> \n
3591          * conversion, substitting signatures, {{subst:}} templates, etc.
3592          *
3593          * @param string $text the text to transform
3594          * @param Title &$title the Title object for the current article
3595          * @param User &$user the User object describing the current user
3596          * @param ParserOptions $options parsing options
3597          * @param bool $clearState whether to clear the parser state first
3598          * @return string the altered wiki markup
3599          * @public
3600          */
3601         function preSaveTransform( $text, &$title, $user, $options, $clearState = true ) {
3602                 $this->mOptions = $options;
3603                 $this->setTitle( $title );
3604                 $this->setOutputType( self::OT_WIKI );
3605
3606                 if ( $clearState ) {
3607                         $this->clearState();
3608                 }
3609
3610                 $pairs = array(
3611                         "\r\n" => "\n",
3612                 );
3613                 $text = str_replace( array_keys( $pairs ), array_values( $pairs ), $text );
3614                 $text = $this->pstPass2( $text, $user );
3615                 $text = $this->mStripState->unstripBoth( $text );
3616                 return $text;
3617         }
3618
3619         /**
3620          * Pre-save transform helper function
3621          * @private
3622          */
3623         function pstPass2( $text, $user ) {
3624                 global $wgContLang, $wgLocaltimezone;
3625
3626                 /* Note: This is the timestamp saved as hardcoded wikitext to
3627                  * the database, we use $wgContLang here in order to give
3628                  * everyone the same signature and use the default one rather
3629                  * than the one selected in each user's preferences.
3630                  *
3631                  * (see also bug 12815)
3632                  */
3633                 $ts = $this->mOptions->getTimestamp();
3634                 $tz = 'UTC';
3635                 if ( isset( $wgLocaltimezone ) ) {
3636                         $unixts = wfTimestamp( TS_UNIX, $ts );
3637                         $oldtz = getenv( 'TZ' );
3638                         putenv( 'TZ='.$wgLocaltimezone );
3639                         $ts = date( 'YmdHis', $unixts );
3640                         $tz = date( 'T', $unixts );  # might vary on DST changeover!
3641                         putenv( 'TZ='.$oldtz );
3642                 }
3643                 $d = $wgContLang->timeanddate( $ts, false, false ) . " ($tz)";
3644
3645                 # Variable replacement
3646                 # Because mOutputType is OT_WIKI, this will only process {{subst:xxx}} type tags
3647                 $text = $this->replaceVariables( $text );
3648
3649                 # Signatures
3650                 $sigText = $this->getUserSig( $user );
3651                 $text = strtr( $text, array(
3652                         '~~~~~' => $d,
3653                         '~~~~' => "$sigText $d",
3654                         '~~~' => $sigText
3655                 ) );
3656
3657                 # Context links: [[|name]] and [[name (context)|]]
3658                 #
3659                 global $wgLegalTitleChars;
3660                 $tc = "[$wgLegalTitleChars]";
3661                 $nc = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
3662
3663                 $p1 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\))\\|]]/";            # [[ns:page (context)|]]
3664                 $p3 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\)|)(, $tc+|)\\|]]/";  # [[ns:page (context), context|]]
3665                 $p2 = "/\[\[\\|($tc+)]]/";                                      # [[|page]]
3666
3667                 # try $p1 first, to turn "[[A, B (C)|]]" into "[[A, B (C)|A, B]]"
3668                 $text = preg_replace( $p1, '[[\\1\\2\\3|\\2]]', $text );
3669                 $text = preg_replace( $p3, '[[\\1\\2\\3\\4|\\2]]', $text );
3670
3671                 $t = $this->mTitle->getText();
3672                 $m = array();
3673                 if ( preg_match( "/^($nc+:|)$tc+?( \\($tc+\\))$/", $t, $m ) ) {
3674                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
3675                 } elseif ( preg_match( "/^($nc+:|)$tc+?(, $tc+|)$/", $t, $m ) && '' != "$m[1]$m[2]" ) {
3676                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
3677                 } else {
3678                         # if there's no context, don't bother duplicating the title
3679                         $text = preg_replace( $p2, '[[\\1]]', $text );
3680                 }
3681
3682                 # Trim trailing whitespace
3683                 $text = rtrim( $text );
3684
3685                 return $text;
3686         }
3687
3688         /**
3689          * Fetch the user's signature text, if any, and normalize to
3690          * validated, ready-to-insert wikitext.
3691          *
3692          * @param User $user
3693          * @return string
3694          * @private
3695          */
3696         function getUserSig( &$user ) {
3697                 global $wgMaxSigChars;
3698
3699                 $username = $user->getName();
3700                 $nickname = $user->getOption( 'nickname' );
3701                 $nickname = $nickname === '' ? $username : $nickname;
3702
3703                 if( mb_strlen( $nickname ) > $wgMaxSigChars ) {
3704                         $nickname = $username;
3705                         wfDebug( __METHOD__ . ": $username has overlong signature.\n" );
3706                 } elseif( $user->getBoolOption( 'fancysig' ) !== false ) {
3707                         # Sig. might contain markup; validate this
3708                         if( $this->validateSig( $nickname ) !== false ) {
3709                                 # Validated; clean up (if needed) and return it
3710                                 return $this->cleanSig( $nickname, true );
3711                         } else {
3712                                 # Failed to validate; fall back to the default
3713                                 $nickname = $username;
3714                                 wfDebug( "Parser::getUserSig: $username has bad XML tags in signature.\n" );
3715                         }
3716                 }
3717
3718                 // Make sure nickname doesnt get a sig in a sig
3719                 $nickname = $this->cleanSigInSig( $nickname );
3720
3721                 # If we're still here, make it a link to the user page
3722                 $userText = wfEscapeWikiText( $username );
3723                 $nickText = wfEscapeWikiText( $nickname );
3724                 if ( $user->isAnon() )  {
3725                         return wfMsgExt( 'signature-anon', array( 'content', 'parsemag' ), $userText, $nickText );
3726                 } else {
3727                         return wfMsgExt( 'signature', array( 'content', 'parsemag' ), $userText, $nickText );
3728                 }
3729         }
3730
3731         /**
3732          * Check that the user's signature contains no bad XML
3733          *
3734          * @param string $text
3735          * @return mixed An expanded string, or false if invalid.
3736          */
3737         function validateSig( $text ) {
3738                 return( wfIsWellFormedXmlFragment( $text ) ? $text : false );
3739         }
3740
3741         /**
3742          * Clean up signature text
3743          *
3744          * 1) Strip ~~~, ~~~~ and ~~~~~ out of signatures @see cleanSigInSig
3745          * 2) Substitute all transclusions
3746          *
3747          * @param string $text
3748          * @param $parsing Whether we're cleaning (preferences save) or parsing
3749          * @return string Signature text
3750          */
3751         function cleanSig( $text, $parsing = false ) {
3752                 if ( !$parsing ) {
3753                         global $wgTitle;
3754                         $this->clearState();
3755                         $this->setTitle( $wgTitle );
3756                         $this->mOptions = new ParserOptions;
3757                         $this->setOutputType = self::OT_PREPROCESS;
3758                 }
3759
3760                 # FIXME: regex doesn't respect extension tags or nowiki
3761                 #  => Move this logic to braceSubstitution()
3762                 $substWord = MagicWord::get( 'subst' );
3763                 $substRegex = '/\{\{(?!(?:' . $substWord->getBaseRegex() . '))/x' . $substWord->getRegexCase();
3764                 $substText = '{{' . $substWord->getSynonym( 0 );
3765
3766                 $text = preg_replace( $substRegex, $substText, $text );
3767                 $text = $this->cleanSigInSig( $text );
3768                 $dom = $this->preprocessToDom( $text );
3769                 $frame = $this->getPreprocessor()->newFrame();
3770                 $text = $frame->expand( $dom );
3771
3772                 if ( !$parsing ) {
3773                         $text = $this->mStripState->unstripBoth( $text );
3774                 }
3775
3776                 return $text;
3777         }
3778
3779         /**
3780          * Strip ~~~, ~~~~ and ~~~~~ out of signatures
3781          * @param string $text
3782          * @return string Signature text with /~{3,5}/ removed
3783          */
3784         function cleanSigInSig( $text ) {
3785                 $text = preg_replace( '/~{3,5}/', '', $text );
3786                 return $text;
3787         }
3788
3789         /**
3790          * Set up some variables which are usually set up in parse()
3791          * so that an external function can call some class members with confidence
3792          * @public
3793          */
3794         function startExternalParse( &$title, $options, $outputType, $clearState = true ) {
3795                 $this->setTitle( $title );
3796                 $this->mOptions = $options;
3797                 $this->setOutputType( $outputType );
3798                 if ( $clearState ) {
3799                         $this->clearState();
3800                 }
3801         }
3802
3803         /**
3804          * Wrapper for preprocess()
3805          *
3806          * @param string $text the text to preprocess
3807          * @param ParserOptions $options  options
3808          * @return string
3809          * @public
3810          */
3811         function transformMsg( $text, $options ) {
3812                 global $wgTitle;
3813                 static $executing = false;
3814
3815                 $fname = "Parser::transformMsg";
3816
3817                 # Guard against infinite recursion
3818                 if ( $executing ) {
3819                         return $text;
3820                 }
3821                 $executing = true;
3822
3823                 wfProfileIn($fname);
3824                 $text = $this->preprocess( $text, $wgTitle, $options );
3825
3826                 $executing = false;
3827                 wfProfileOut($fname);
3828                 return $text;
3829         }
3830
3831         /**
3832          * Create an HTML-style tag, e.g. <yourtag>special text</yourtag>
3833          * The callback should have the following form:
3834          *    function myParserHook( $text, $params, &$parser ) { ... }
3835          *
3836          * Transform and return $text. Use $parser for any required context, e.g. use
3837          * $parser->getTitle() and $parser->getOptions() not $wgTitle or $wgOut->mParserOptions
3838          *
3839          * @public
3840          *
3841          * @param mixed $tag The tag to use, e.g. 'hook' for <hook>
3842          * @param mixed $callback The callback function (and object) to use for the tag
3843          *
3844          * @return The old value of the mTagHooks array associated with the hook
3845          */
3846         function setHook( $tag, $callback ) {
3847                 $tag = strtolower( $tag );
3848                 $oldVal = isset( $this->mTagHooks[$tag] ) ? $this->mTagHooks[$tag] : null;
3849                 $this->mTagHooks[$tag] = $callback;
3850                 if( !in_array( $tag, $this->mStripList ) ) {
3851                         $this->mStripList[] = $tag;
3852                 }
3853
3854                 return $oldVal;
3855         }
3856
3857         function setTransparentTagHook( $tag, $callback ) {
3858                 $tag = strtolower( $tag );
3859                 $oldVal = isset( $this->mTransparentTagHooks[$tag] ) ? $this->mTransparentTagHooks[$tag] : null;
3860                 $this->mTransparentTagHooks[$tag] = $callback;
3861
3862                 return $oldVal;
3863         }
3864
3865         /**
3866          * Remove all tag hooks
3867          */
3868         function clearTagHooks() {
3869                 $this->mTagHooks = array();
3870                 $this->mStripList = $this->mDefaultStripList;
3871         }
3872
3873         /**
3874          * Create a function, e.g. {{sum:1|2|3}}
3875          * The callback function should have the form:
3876          *    function myParserFunction( &$parser, $arg1, $arg2, $arg3 ) { ... }
3877          *
3878          * The callback may either return the text result of the function, or an array with the text
3879          * in element 0, and a number of flags in the other elements. The names of the flags are
3880          * specified in the keys. Valid flags are:
3881          *   found                     The text returned is valid, stop processing the template. This
3882          *                             is on by default.
3883          *   nowiki                    Wiki markup in the return value should be escaped
3884          *   isHTML                    The returned text is HTML, armour it against wikitext transformation
3885          *
3886          * @public
3887          *
3888          * @param string $id The magic word ID
3889          * @param mixed $callback The callback function (and object) to use
3890          * @param integer $flags a combination of the following flags:
3891          *                SFH_NO_HASH No leading hash, i.e. {{plural:...}} instead of {{#if:...}}
3892          *
3893          * @return The old callback function for this name, if any
3894          */
3895         function setFunctionHook( $id, $callback, $flags = 0 ) {
3896                 $oldVal = isset( $this->mFunctionHooks[$id] ) ? $this->mFunctionHooks[$id][0] : null;
3897                 $this->mFunctionHooks[$id] = array( $callback, $flags );
3898
3899                 # Add to function cache
3900                 $mw = MagicWord::get( $id );
3901                 if( !$mw )
3902                         throw new MWException( 'Parser::setFunctionHook() expecting a magic word identifier.' );
3903
3904                 $synonyms = $mw->getSynonyms();
3905                 $sensitive = intval( $mw->isCaseSensitive() );
3906
3907                 foreach ( $synonyms as $syn ) {
3908                         # Case
3909                         if ( !$sensitive ) {
3910                                 $syn = strtolower( $syn );
3911                         }
3912                         # Add leading hash
3913                         if ( !( $flags & SFH_NO_HASH ) ) {
3914                                 $syn = '#' . $syn;
3915                         }
3916                         # Remove trailing colon
3917                         if ( substr( $syn, -1, 1 ) == ':' ) {
3918                                 $syn = substr( $syn, 0, -1 );
3919                         }
3920                         $this->mFunctionSynonyms[$sensitive][$syn] = $id;
3921                 }
3922                 return $oldVal;
3923         }
3924
3925         /**
3926          * Get all registered function hook identifiers
3927          *
3928          * @return array
3929          */
3930         function getFunctionHooks() {
3931                 return array_keys( $this->mFunctionHooks );
3932         }
3933
3934         /**
3935          * Replace <!--LINK--> link placeholders with actual links, in the buffer
3936          * Placeholders created in Skin::makeLinkObj()
3937          * Returns an array of link CSS classes, indexed by PDBK.
3938          * $options is a bit field, RLH_FOR_UPDATE to select for update
3939          */
3940         function replaceLinkHolders( &$text, $options = 0 ) {
3941                 global $wgUser;
3942                 global $wgContLang;
3943
3944                 $fname = 'Parser::replaceLinkHolders';
3945                 wfProfileIn( $fname );
3946
3947                 $pdbks = array();
3948                 $colours = array();
3949                 $linkcolour_ids = array();
3950                 $sk = $this->mOptions->getSkin();
3951                 $linkCache =& LinkCache::singleton();
3952
3953                 if ( !empty( $this->mLinkHolders['namespaces'] ) ) {
3954                         wfProfileIn( $fname.'-check' );
3955                         $dbr = wfGetDB( DB_SLAVE );
3956                         $page = $dbr->tableName( 'page' );
3957                         $threshold = $wgUser->getOption('stubthreshold');
3958
3959                         # Sort by namespace
3960                         asort( $this->mLinkHolders['namespaces'] );
3961
3962                         # Generate query
3963                         $query = false;
3964                         $current = null;
3965                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
3966                                 # Make title object
3967                                 $title = $this->mLinkHolders['titles'][$key];
3968
3969                                 # Skip invalid entries.
3970                                 # Result will be ugly, but prevents crash.
3971                                 if ( is_null( $title ) ) {
3972                                         continue;
3973                                 }
3974                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
3975
3976                                 # Check if it's a static known link, e.g. interwiki
3977                                 if ( $title->isAlwaysKnown() ) {
3978                                         $colours[$pdbk] = '';
3979                                 } elseif ( ( $id = $linkCache->getGoodLinkID( $pdbk ) ) != 0 ) {
3980                                         $colours[$pdbk] = '';
3981                                         $this->mOutput->addLink( $title, $id );
3982                                 } elseif ( $linkCache->isBadLink( $pdbk ) ) {
3983                                         $colours[$pdbk] = 'new';
3984                                 } elseif ( $title->getNamespace() == NS_SPECIAL && !SpecialPage::exists( $pdbk ) ) {
3985                                         $colours[$pdbk] = 'new';
3986                                 } else {
3987                                         # Not in the link cache, add it to the query
3988                                         if ( !isset( $current ) ) {
3989                                                 $current = $ns;
3990                                                 $query =  "SELECT page_id, page_namespace, page_title, page_is_redirect";
3991                                                 if ( $threshold > 0 ) {
3992                                                         $query .= ', page_len';
3993                                                 }
3994                                                 $query .= " FROM $page WHERE (page_namespace=$ns AND page_title IN(";
3995                                         } elseif ( $current != $ns ) {
3996                                                 $current = $ns;
3997                                                 $query .= ")) OR (page_namespace=$ns AND page_title IN(";
3998                                         } else {
3999                                                 $query .= ', ';
4000                                         }
4001
4002                                         $query .= $dbr->addQuotes( $this->mLinkHolders['dbkeys'][$key] );
4003                                 }
4004                         }
4005                         if ( $query ) {
4006                                 $query .= '))';
4007                                 if ( $options & RLH_FOR_UPDATE ) {
4008                                         $query .= ' FOR UPDATE';
4009                                 }
4010
4011                                 $res = $dbr->query( $query, $fname );
4012
4013                                 # Fetch data and form into an associative array
4014                                 # non-existent = broken
4015                                 while ( $s = $dbr->fetchObject($res) ) {
4016                                         $title = Title::makeTitle( $s->page_namespace, $s->page_title );
4017                                         $pdbk = $title->getPrefixedDBkey();
4018                                         $linkCache->addGoodLinkObj( $s->page_id, $title );
4019                                         $this->mOutput->addLink( $title, $s->page_id );
4020                                         $colours[$pdbk] = $sk->getLinkColour( $s, $threshold );
4021                                         //add id to the extension todolist
4022                                         $linkcolour_ids[$s->page_id] = $pdbk;
4023                                 }
4024                                 //pass an array of page_ids to an extension
4025                                 wfRunHooks( 'GetLinkColours', array( $linkcolour_ids, &$colours ) );
4026                         }
4027                         wfProfileOut( $fname.'-check' );
4028
4029                         # Do a second query for different language variants of links and categories
4030                         if($wgContLang->hasVariants()){
4031                                 $linkBatch = new LinkBatch();
4032                                 $variantMap = array(); // maps $pdbkey_Variant => $keys (of link holders)
4033                                 $categoryMap = array(); // maps $category_variant => $category (dbkeys)
4034                                 $varCategories = array(); // category replacements oldDBkey => newDBkey
4035
4036                                 $categories = $this->mOutput->getCategoryLinks();
4037
4038                                 // Add variants of links to link batch
4039                                 foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
4040                                         $title = $this->mLinkHolders['titles'][$key];
4041                                         if ( is_null( $title ) )
4042                                                 continue;
4043
4044                                         $pdbk = $title->getPrefixedDBkey();
4045                                         $titleText = $title->getText();
4046
4047                                         // generate all variants of the link title text
4048                                         $allTextVariants = $wgContLang->convertLinkToAllVariants($titleText);
4049
4050                                         // if link was not found (in first query), add all variants to query
4051                                         if ( !isset($colours[$pdbk]) ){
4052                                                 foreach($allTextVariants as $textVariant){
4053                                                         if($textVariant != $titleText){
4054                                                                 $variantTitle = Title::makeTitle( $ns, $textVariant );
4055                                                                 if(is_null($variantTitle)) continue;
4056                                                                 $linkBatch->addObj( $variantTitle );
4057                                                                 $variantMap[$variantTitle->getPrefixedDBkey()][] = $key;
4058                                                         }
4059                                                 }
4060                                         }
4061                                 }
4062
4063                                 // process categories, check if a category exists in some variant
4064                                 foreach( $categories as $category ){
4065                                         $variants = $wgContLang->convertLinkToAllVariants($category);
4066                                         foreach($variants as $variant){
4067                                                 if($variant != $category){
4068                                                         $variantTitle = Title::newFromDBkey( Title::makeName(NS_CATEGORY,$variant) );
4069                                                         if(is_null($variantTitle)) continue;
4070                                                         $linkBatch->addObj( $variantTitle );
4071                                                         $categoryMap[$variant] = $category;
4072                                                 }
4073                                         }
4074                                 }
4075
4076
4077                                 if(!$linkBatch->isEmpty()){
4078                                         // construct query
4079                                         $titleClause = $linkBatch->constructSet('page', $dbr);
4080
4081                                         $variantQuery =  "SELECT page_id, page_namespace, page_title, page_is_redirect";
4082                                         if ( $threshold > 0 ) {
4083                                                 $variantQuery .= ', page_len';
4084                                         }
4085
4086                                         $variantQuery .= " FROM $page WHERE $titleClause";
4087                                         if ( $options & RLH_FOR_UPDATE ) {
4088                                                 $variantQuery .= ' FOR UPDATE';
4089                                         }
4090
4091                                         $varRes = $dbr->query( $variantQuery, $fname );
4092
4093                                         // for each found variants, figure out link holders and replace
4094                                         while ( $s = $dbr->fetchObject($varRes) ) {
4095
4096                                                 $variantTitle = Title::makeTitle( $s->page_namespace, $s->page_title );
4097                                                 $varPdbk = $variantTitle->getPrefixedDBkey();
4098                                                 $vardbk = $variantTitle->getDBkey();
4099
4100                                                 $holderKeys = array();
4101                                                 if(isset($variantMap[$varPdbk])){
4102                                                         $holderKeys = $variantMap[$varPdbk];
4103                                                         $linkCache->addGoodLinkObj( $s->page_id, $variantTitle );
4104                                                         $this->mOutput->addLink( $variantTitle, $s->page_id );
4105                                                 }
4106
4107                                                 // loop over link holders
4108                                                 foreach($holderKeys as $key){
4109                                                         $title = $this->mLinkHolders['titles'][$key];
4110                                                         if ( is_null( $title ) ) continue;
4111
4112                                                         $pdbk = $title->getPrefixedDBkey();
4113
4114                                                         if(!isset($colours[$pdbk])){
4115                                                                 // found link in some of the variants, replace the link holder data
4116                                                                 $this->mLinkHolders['titles'][$key] = $variantTitle;
4117                                                                 $this->mLinkHolders['dbkeys'][$key] = $variantTitle->getDBkey();
4118
4119                                                                 // set pdbk and colour
4120                                                                 $pdbks[$key] = $varPdbk;
4121                                                                 $colours[$varPdbk] = $sk->getLinkColour( $s, $threshold );
4122                                                                 $linkcolour_ids[$s->page_id] = $pdbk;
4123                                                         }
4124                                                         wfRunHooks( 'GetLinkColours', array( $linkcolour_ids, &$colours ) );
4125                                                 }
4126
4127                                                 // check if the object is a variant of a category
4128                                                 if(isset($categoryMap[$vardbk])){
4129                                                         $oldkey = $categoryMap[$vardbk];
4130                                                         if($oldkey != $vardbk)
4131                                                                 $varCategories[$oldkey]=$vardbk;
4132                                                 }
4133                                         }
4134
4135                                         // rebuild the categories in original order (if there are replacements)
4136                                         if(count($varCategories)>0){
4137                                                 $newCats = array();
4138                                                 $originalCats = $this->mOutput->getCategories();
4139                                                 foreach($originalCats as $cat => $sortkey){
4140                                                         // make the replacement
4141                                                         if( array_key_exists($cat,$varCategories) )
4142                                                                 $newCats[$varCategories[$cat]] = $sortkey;
4143                                                         else $newCats[$cat] = $sortkey;
4144                                                 }
4145                                                 $this->mOutput->setCategoryLinks($newCats);
4146                                         }
4147                                 }
4148                         }
4149
4150                         # Construct search and replace arrays
4151                         wfProfileIn( $fname.'-construct' );
4152                         $replacePairs = array();
4153                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
4154                                 $pdbk = $pdbks[$key];
4155                                 $searchkey = "<!--LINK $key-->";
4156                                 $title = $this->mLinkHolders['titles'][$key];
4157                                 if ( !isset( $colours[$pdbk] ) || $colours[$pdbk] == 'new' ) {
4158                                         $linkCache->addBadLinkObj( $title );
4159                                         $colours[$pdbk] = 'new';
4160                                         $this->mOutput->addLink( $title, 0 );
4161                                         $replacePairs[$searchkey] = $sk->makeBrokenLinkObj( $title,
4162                                                                         $this->mLinkHolders['texts'][$key],
4163                                                                         $this->mLinkHolders['queries'][$key] );
4164                                 } else {
4165                                         $replacePairs[$searchkey] = $sk->makeColouredLinkObj( $title, $colours[$pdbk],
4166                                                                         $this->mLinkHolders['texts'][$key],
4167                                                                         $this->mLinkHolders['queries'][$key] );
4168                                 }
4169                         }
4170                         $replacer = new HashtableReplacer( $replacePairs, 1 );
4171                         wfProfileOut( $fname.'-construct' );
4172
4173                         # Do the thing
4174                         wfProfileIn( $fname.'-replace' );
4175                         $text = preg_replace_callback(
4176                                 '/(<!--LINK .*?-->)/',
4177                                 $replacer->cb(),
4178                                 $text);
4179
4180                         wfProfileOut( $fname.'-replace' );
4181                 }
4182
4183                 # Now process interwiki link holders
4184                 # This is quite a bit simpler than internal links
4185                 if ( !empty( $this->mInterwikiLinkHolders['texts'] ) ) {
4186                         wfProfileIn( $fname.'-interwiki' );
4187                         # Make interwiki link HTML
4188                         $replacePairs = array();
4189                         foreach( $this->mInterwikiLinkHolders['texts'] as $key => $link ) {
4190                                 $title = $this->mInterwikiLinkHolders['titles'][$key];
4191                                 $replacePairs[$key] = $sk->makeLinkObj( $title, $link );
4192                         }
4193                         $replacer = new HashtableReplacer( $replacePairs, 1 );
4194
4195                         $text = preg_replace_callback(
4196                                 '/<!--IWLINK (.*?)-->/',
4197                                 $replacer->cb(),
4198                                 $text );
4199                         wfProfileOut( $fname.'-interwiki' );
4200                 }
4201
4202                 wfProfileOut( $fname );
4203                 return $colours;
4204         }
4205
4206         /**
4207          * Replace <!--LINK--> link placeholders with plain text of links
4208          * (not HTML-formatted).
4209          * @param string $text
4210          * @return string
4211          */
4212         function replaceLinkHoldersText( $text ) {
4213                 $fname = 'Parser::replaceLinkHoldersText';
4214                 wfProfileIn( $fname );
4215
4216                 $text = preg_replace_callback(
4217                         '/<!--(LINK|IWLINK) (.*?)-->/',
4218                         array( &$this, 'replaceLinkHoldersTextCallback' ),
4219                         $text );
4220
4221                 wfProfileOut( $fname );
4222                 return $text;
4223         }
4224
4225         /**
4226          * @param array $matches
4227          * @return string
4228          * @private
4229          */
4230         function replaceLinkHoldersTextCallback( $matches ) {
4231                 $type = $matches[1];
4232                 $key  = $matches[2];
4233                 if( $type == 'LINK' ) {
4234                         if( isset( $this->mLinkHolders['texts'][$key] ) ) {
4235                                 return $this->mLinkHolders['texts'][$key];
4236                         }
4237                 } elseif( $type == 'IWLINK' ) {
4238                         if( isset( $this->mInterwikiLinkHolders['texts'][$key] ) ) {
4239                                 return $this->mInterwikiLinkHolders['texts'][$key];
4240                         }
4241                 }
4242                 return $matches[0];
4243         }
4244
4245         /**
4246          * Tag hook handler for 'pre'.
4247          */
4248         function renderPreTag( $text, $attribs ) {
4249                 // Backwards-compatibility hack
4250                 $content = StringUtils::delimiterReplace( '<nowiki>', '</nowiki>', '$1', $text, 'i' );
4251
4252                 $attribs = Sanitizer::validateTagAttributes( $attribs, 'pre' );
4253                 return wfOpenElement( 'pre', $attribs ) .
4254                         Xml::escapeTagsOnly( $content ) .
4255                         '</pre>';
4256         }
4257
4258         /**
4259          * Renders an image gallery from a text with one line per image.
4260          * text labels may be given by using |-style alternative text. E.g.
4261          *   Image:one.jpg|The number "1"
4262          *   Image:tree.jpg|A tree
4263          * given as text will return the HTML of a gallery with two images,
4264          * labeled 'The number "1"' and
4265          * 'A tree'.
4266          */
4267         function renderImageGallery( $text, $params ) {
4268                 $ig = new ImageGallery();
4269                 $ig->setContextTitle( $this->mTitle );
4270                 $ig->setShowBytes( false );
4271                 $ig->setShowFilename( false );
4272                 $ig->setParser( $this );
4273                 $ig->setHideBadImages();
4274                 $ig->setAttributes( Sanitizer::validateTagAttributes( $params, 'table' ) );
4275                 $ig->useSkin( $this->mOptions->getSkin() );
4276                 $ig->mRevisionId = $this->mRevisionId;
4277
4278                 if( isset( $params['caption'] ) ) {
4279                         $caption = $params['caption'];
4280                         $caption = htmlspecialchars( $caption );
4281                         $caption = $this->replaceInternalLinks( $caption );
4282                         $ig->setCaptionHtml( $caption );
4283                 }
4284                 if( isset( $params['perrow'] ) ) {
4285                         $ig->setPerRow( $params['perrow'] );
4286                 }
4287                 if( isset( $params['widths'] ) ) {
4288                         $ig->setWidths( $params['widths'] );
4289                 }
4290                 if( isset( $params['heights'] ) ) {
4291                         $ig->setHeights( $params['heights'] );
4292                 }
4293
4294                 wfRunHooks( 'BeforeParserrenderImageGallery', array( &$this, &$ig ) );
4295
4296                 $lines = explode( "\n", $text );
4297                 foreach ( $lines as $line ) {
4298                         # match lines like these:
4299                         # Image:someimage.jpg|This is some image
4300                         $matches = array();
4301                         preg_match( "/^([^|]+)(\\|(.*))?$/", $line, $matches );
4302                         # Skip empty lines
4303                         if ( count( $matches ) == 0 ) {
4304                                 continue;
4305                         }
4306                         $tp = Title::newFromText( $matches[1] );
4307                         $nt =& $tp;
4308                         if( is_null( $nt ) ) {
4309                                 # Bogus title. Ignore these so we don't bomb out later.
4310                                 continue;
4311                         }
4312                         if ( isset( $matches[3] ) ) {
4313                                 $label = $matches[3];
4314                         } else {
4315                                 $label = '';
4316                         }
4317
4318                         $html = $this->recursiveTagParse( trim( $label ) );
4319
4320                         $ig->add( $nt, $html );
4321
4322                         # Only add real images (bug #5586)
4323                         if ( $nt->getNamespace() == NS_IMAGE ) {
4324                                 $this->mOutput->addImage( $nt->getDBkey() );
4325                         }
4326                 }
4327                 return $ig->toHTML();
4328         }
4329
4330         function getImageParams( $handler ) {
4331                 if ( $handler ) {
4332                         $handlerClass = get_class( $handler );
4333                 } else {
4334                         $handlerClass = '';
4335                 }
4336                 if ( !isset( $this->mImageParams[$handlerClass]  ) ) {
4337                         // Initialise static lists
4338                         static $internalParamNames = array(
4339                                 'horizAlign' => array( 'left', 'right', 'center', 'none' ),
4340                                 'vertAlign' => array( 'baseline', 'sub', 'super', 'top', 'text-top', 'middle',
4341                                         'bottom', 'text-bottom' ),
4342                                 'frame' => array( 'thumbnail', 'manualthumb', 'framed', 'frameless',
4343                                         'upright', 'border' ),
4344                         );
4345                         static $internalParamMap;
4346                         if ( !$internalParamMap ) {
4347                                 $internalParamMap = array();
4348                                 foreach ( $internalParamNames as $type => $names ) {
4349                                         foreach ( $names as $name ) {
4350                                                 $magicName = str_replace( '-', '_', "img_$name" );
4351                                                 $internalParamMap[$magicName] = array( $type, $name );
4352                                         }
4353                                 }
4354                         }
4355
4356                         // Add handler params
4357                         $paramMap = $internalParamMap;
4358                         if ( $handler ) {
4359                                 $handlerParamMap = $handler->getParamMap();
4360                                 foreach ( $handlerParamMap as $magic => $paramName ) {
4361                                         $paramMap[$magic] = array( 'handler', $paramName );
4362                                 }
4363                         }
4364                         $this->mImageParams[$handlerClass] = $paramMap;
4365                         $this->mImageParamsMagicArray[$handlerClass] = new MagicWordArray( array_keys( $paramMap ) );
4366                 }
4367                 return array( $this->mImageParams[$handlerClass], $this->mImageParamsMagicArray[$handlerClass] );
4368         }
4369
4370         /**
4371          * Parse image options text and use it to make an image
4372          */
4373         function makeImage( $title, $options ) {
4374                 # Check if the options text is of the form "options|alt text"
4375                 # Options are:
4376                 #  * thumbnail          make a thumbnail with enlarge-icon and caption, alignment depends on lang
4377                 #  * left               no resizing, just left align. label is used for alt= only
4378                 #  * right              same, but right aligned
4379                 #  * none               same, but not aligned
4380                 #  * ___px              scale to ___ pixels width, no aligning. e.g. use in taxobox
4381                 #  * center             center the image
4382                 #  * framed             Keep original image size, no magnify-button.
4383                 #  * frameless          like 'thumb' but without a frame. Keeps user preferences for width
4384                 #  * upright            reduce width for upright images, rounded to full __0 px
4385                 #  * border             draw a 1px border around the image
4386                 # vertical-align values (no % or length right now):
4387                 #  * baseline
4388                 #  * sub
4389                 #  * super
4390                 #  * top
4391                 #  * text-top
4392                 #  * middle
4393                 #  * bottom
4394                 #  * text-bottom
4395
4396                 $parts = array_map( 'trim', explode( '|', $options) );
4397                 $sk = $this->mOptions->getSkin();
4398
4399                 # Give extensions a chance to select the file revision for us
4400                 $skip = $time = false;
4401                 wfRunHooks( 'BeforeParserMakeImageLinkObj', array( &$this, &$title, &$skip, &$time ) );
4402
4403                 if ( $skip ) {
4404                         return $sk->makeLinkObj( $title );
4405                 }
4406
4407                 # Get parameter map
4408                 $file = wfFindFile( $title, $time );
4409                 $handler = $file ? $file->getHandler() : false;
4410
4411                 list( $paramMap, $mwArray ) = $this->getImageParams( $handler );
4412
4413                 # Process the input parameters
4414                 $caption = '';
4415                 $params = array( 'frame' => array(), 'handler' => array(),
4416                         'horizAlign' => array(), 'vertAlign' => array() );
4417                 foreach( $parts as $part ) {
4418                         list( $magicName, $value ) = $mwArray->matchVariableStartToEnd( $part );
4419                         $validated = false;
4420                         if( isset( $paramMap[$magicName] ) ) {
4421                                 list( $type, $paramName ) = $paramMap[$magicName];
4422
4423                                 // Special case; width and height come in one variable together
4424                                 if( $type == 'handler' && $paramName == 'width' ) {
4425                                         $m = array();
4426                                         # (bug 13500) In both cases (width/height and width only),
4427                                         # permit trailing "px" for backward compatibility.
4428                                         if ( preg_match( '/^([0-9]*)x([0-9]*)\s*(?:px)?\s*$/', $value, $m ) ) {
4429                                                 $width = intval( $m[1] );
4430                                                 $height = intval( $m[2] );
4431                                                 if ( $handler->validateParam( 'width', $width ) ) {
4432                                                         $params[$type]['width'] = $width;
4433                                                         $validated = true;
4434                                                 }
4435                                                 if ( $handler->validateParam( 'height', $height ) ) {
4436                                                         $params[$type]['height'] = $height;
4437                                                         $validated = true;
4438                                                 }
4439                                         } elseif ( preg_match( '/^[0-9]*\s*(?:px)?\s*$/', $value ) ) {
4440                                                 $width = intval( $value );
4441                                                 if ( $handler->validateParam( 'width', $width ) ) {
4442                                                         $params[$type]['width'] = $width;
4443                                                         $validated = true;
4444                                                 }
4445                                         } // else no validation -- bug 13436
4446                                 } else {
4447                                         if ( $type == 'handler' ) {
4448                                                 # Validate handler parameter
4449                                                 $validated = $handler->validateParam( $paramName, $value );
4450                                         } else {
4451                                                 # Validate internal parameters
4452                                                 $validated = ( $value === false || is_numeric( trim( $value ) ) );
4453                                         }
4454
4455                                         if ( $validated ) {
4456                                                 $params[$type][$paramName] = $value;
4457                                         }
4458                                 }
4459                         }
4460                         if ( !$validated ) {
4461                                 $caption = $part;
4462                         }
4463                 }
4464
4465                 # Process alignment parameters
4466                 if ( $params['horizAlign'] ) {
4467                         $params['frame']['align'] = key( $params['horizAlign'] );
4468                 }
4469                 if ( $params['vertAlign'] ) {
4470                         $params['frame']['valign'] = key( $params['vertAlign'] );
4471                 }
4472
4473                 # Strip bad stuff out of the alt text
4474                 $alt = $this->replaceLinkHoldersText( $caption );
4475
4476                 # make sure there are no placeholders in thumbnail attributes
4477                 # that are later expanded to html- so expand them now and
4478                 # remove the tags
4479                 $alt = $this->mStripState->unstripBoth( $alt );
4480                 $alt = Sanitizer::stripAllTags( $alt );
4481
4482                 $params['frame']['alt'] = $alt;
4483                 $params['frame']['caption'] = $caption;
4484
4485                 wfRunHooks( 'ParserMakeImageParams', array( $title, $file, &$params ) );
4486
4487                 # Linker does the rest
4488                 $ret = $sk->makeImageLink2( $title, $file, $params['frame'], $params['handler'], $time );
4489
4490                 # Give the handler a chance to modify the parser object
4491                 if ( $handler ) {
4492                         $handler->parserTransformHook( $this, $file );
4493                 }
4494
4495                 return $ret;
4496         }
4497
4498         /**
4499          * Set a flag in the output object indicating that the content is dynamic and
4500          * shouldn't be cached.
4501          */
4502         function disableCache() {
4503                 wfDebug( "Parser output marked as uncacheable.\n" );
4504                 $this->mOutput->mCacheTime = -1;
4505         }
4506
4507         /**#@+
4508          * Callback from the Sanitizer for expanding items found in HTML attribute
4509          * values, so they can be safely tested and escaped.
4510          * @param string $text
4511          * @param PPFrame $frame
4512          * @return string
4513          * @private
4514          */
4515         function attributeStripCallback( &$text, $frame = false ) {
4516                 $text = $this->replaceVariables( $text, $frame );
4517                 $text = $this->mStripState->unstripBoth( $text );
4518                 return $text;
4519         }
4520
4521         /**#@-*/
4522
4523         /**#@+
4524          * Accessor/mutator
4525          */
4526         function Title( $x = NULL ) { return wfSetVar( $this->mTitle, $x ); }
4527         function Options( $x = NULL ) { return wfSetVar( $this->mOptions, $x ); }
4528         function OutputType( $x = NULL ) { return wfSetVar( $this->mOutputType, $x ); }
4529         /**#@-*/
4530
4531         /**#@+
4532          * Accessor
4533          */
4534         function getTags() { return array_merge( array_keys($this->mTransparentTagHooks), array_keys( $this->mTagHooks ) ); }
4535         /**#@-*/
4536
4537
4538         /**
4539          * Break wikitext input into sections, and either pull or replace
4540          * some particular section's text.
4541          *
4542          * External callers should use the getSection and replaceSection methods.
4543          *
4544          * @param string $text Page wikitext
4545          * @param string $section A section identifier string of the form:
4546          *   <flag1> - <flag2> - ... - <section number>
4547          *
4548          * Currently the only recognised flag is "T", which means the target section number
4549          * was derived during a template inclusion parse, in other words this is a template
4550          * section edit link. If no flags are given, it was an ordinary section edit link.
4551          * This flag is required to avoid a section numbering mismatch when a section is
4552          * enclosed by <includeonly> (bug 6563).
4553          *
4554          * The section number 0 pulls the text before the first heading; other numbers will
4555          * pull the given section along with its lower-level subsections. If the section is
4556          * not found, $mode=get will return $newtext, and $mode=replace will return $text.
4557          *
4558          * @param string $mode One of "get" or "replace"
4559          * @param string $newText Replacement text for section data.
4560          * @return string for "get", the extracted section text.
4561          *                for "replace", the whole page with the section replaced.
4562          */
4563         private function extractSections( $text, $section, $mode, $newText='' ) {
4564                 global $wgTitle;
4565                 $this->clearState();
4566                 $this->setTitle( $wgTitle ); // not generally used but removes an ugly failure mode
4567                 $this->mOptions = new ParserOptions;
4568                 $this->setOutputType( self::OT_WIKI );
4569                 $outText = '';
4570                 $frame = $this->getPreprocessor()->newFrame();
4571
4572                 // Process section extraction flags
4573                 $flags = 0;
4574                 $sectionParts = explode( '-', $section );
4575                 $sectionIndex = array_pop( $sectionParts );
4576                 foreach ( $sectionParts as $part ) {
4577                         if ( $part == 'T' ) {
4578                                 $flags |= self::PTD_FOR_INCLUSION;
4579                         }
4580                 }
4581                 // Preprocess the text
4582                 $root = $this->preprocessToDom( $text, $flags );
4583
4584                 // <h> nodes indicate section breaks
4585                 // They can only occur at the top level, so we can find them by iterating the root's children
4586                 $node = $root->getFirstChild();
4587
4588                 // Find the target section
4589                 if ( $sectionIndex == 0 ) {
4590                         // Section zero doesn't nest, level=big
4591                         $targetLevel = 1000;
4592                 } else {
4593             while ( $node ) {
4594                 if ( $node->getName() == 'h' ) {
4595                     $bits = $node->splitHeading();
4596                                         if ( $bits['i'] == $sectionIndex ) {
4597                                         $targetLevel = $bits['level'];
4598                                                 break;
4599                                         }
4600                                 }
4601                                 if ( $mode == 'replace' ) {
4602                                         $outText .= $frame->expand( $node, PPFrame::RECOVER_ORIG );
4603                                 }
4604                                 $node = $node->getNextSibling();
4605                         }
4606                 }
4607
4608                 if ( !$node ) {
4609                         // Not found
4610                         if ( $mode == 'get' ) {
4611                                 return $newText;
4612                         } else {
4613                                 return $text;
4614                         }
4615                 }
4616
4617                 // Find the end of the section, including nested sections
4618                 do {
4619                         if ( $node->getName() == 'h' ) {
4620                                 $bits = $node->splitHeading();
4621                                 $curLevel = $bits['level'];
4622                                 if ( $bits['i'] != $sectionIndex && $curLevel <= $targetLevel ) {
4623                                         break;
4624                                 }
4625                         }
4626                         if ( $mode == 'get' ) {
4627                                 $outText .= $frame->expand( $node, PPFrame::RECOVER_ORIG );
4628                         }
4629                         $node = $node->getNextSibling();
4630                 } while ( $node );
4631
4632                 // Write out the remainder (in replace mode only)
4633                 if ( $mode == 'replace' ) {
4634                         // Output the replacement text
4635                         // Add two newlines on -- trailing whitespace in $newText is conventionally
4636                         // stripped by the editor, so we need both newlines to restore the paragraph gap
4637                         $outText .= $newText . "\n\n";
4638                         while ( $node ) {
4639                                 $outText .= $frame->expand( $node, PPFrame::RECOVER_ORIG );
4640                                 $node = $node->getNextSibling();
4641                         }
4642                 }
4643
4644                 if ( is_string( $outText ) ) {
4645                         // Re-insert stripped tags
4646                         $outText = trim( $this->mStripState->unstripBoth( $outText ) );
4647                 }
4648
4649                 return $outText;
4650         }
4651
4652         /**
4653          * This function returns the text of a section, specified by a number ($section).
4654          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
4655          * the first section before any such heading (section 0).
4656          *
4657          * If a section contains subsections, these are also returned.
4658          *
4659          * @param string $text text to look in
4660          * @param string $section section identifier
4661          * @param string $deftext default to return if section is not found
4662          * @return string text of the requested section
4663          */
4664         public function getSection( $text, $section, $deftext='' ) {
4665                 return $this->extractSections( $text, $section, "get", $deftext );
4666         }
4667
4668         public function replaceSection( $oldtext, $section, $text ) {
4669                 return $this->extractSections( $oldtext, $section, "replace", $text );
4670         }
4671
4672         /**
4673          * Get the timestamp associated with the current revision, adjusted for
4674          * the default server-local timestamp
4675          */
4676         function getRevisionTimestamp() {
4677                 if ( is_null( $this->mRevisionTimestamp ) ) {
4678                         wfProfileIn( __METHOD__ );
4679                         global $wgContLang;
4680                         $dbr = wfGetDB( DB_SLAVE );
4681                         $timestamp = $dbr->selectField( 'revision', 'rev_timestamp',
4682                                         array( 'rev_id' => $this->mRevisionId ), __METHOD__ );
4683
4684                         // Normalize timestamp to internal MW format for timezone processing.
4685                         // This has the added side-effect of replacing a null value with
4686                         // the current time, which gives us more sensible behavior for
4687                         // previews.
4688                         $timestamp = wfTimestamp( TS_MW, $timestamp );
4689
4690                         // The cryptic '' timezone parameter tells to use the site-default
4691                         // timezone offset instead of the user settings.
4692                         //
4693                         // Since this value will be saved into the parser cache, served
4694                         // to other users, and potentially even used inside links and such,
4695                         // it needs to be consistent for all visitors.
4696                         $this->mRevisionTimestamp = $wgContLang->userAdjust( $timestamp, '' );
4697
4698                         wfProfileOut( __METHOD__ );
4699                 }
4700                 return $this->mRevisionTimestamp;
4701         }
4702
4703         /**
4704          * Mutator for $mDefaultSort
4705          *
4706          * @param $sort New value
4707          */
4708         public function setDefaultSort( $sort ) {
4709                 $this->mDefaultSort = $sort;
4710         }
4711
4712         /**
4713          * Accessor for $mDefaultSort
4714          * Will use the title/prefixed title if none is set
4715          *
4716          * @return string
4717          */
4718         public function getDefaultSort() {
4719                 if( $this->mDefaultSort !== false ) {
4720                         return $this->mDefaultSort;
4721                 } else {
4722                         return $this->mTitle->getNamespace() == NS_CATEGORY
4723                                         ? $this->mTitle->getText()
4724                                         : $this->mTitle->getPrefixedText();
4725                 }
4726         }
4727
4728         /**
4729          * Try to guess the section anchor name based on a wikitext fragment
4730          * presumably extracted from a heading, for example "Header" from
4731          * "== Header ==".
4732          */
4733         public function guessSectionNameFromWikiText( $text ) {
4734                 # Strip out wikitext links(they break the anchor)
4735                 $text = $this->stripSectionName( $text );
4736                 $headline = Sanitizer::decodeCharReferences( $text );
4737                 # strip out HTML
4738                 $headline = StringUtils::delimiterReplace( '<', '>', '', $headline );
4739                 $headline = trim( $headline );
4740                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
4741                 $replacearray = array(
4742                         '%3A' => ':',
4743                         '%' => '.'
4744                 );
4745                 return str_replace(
4746                         array_keys( $replacearray ),
4747                         array_values( $replacearray ),
4748                         $sectionanchor );
4749         }
4750
4751         /**
4752          * Strips a text string of wikitext for use in a section anchor
4753          *
4754          * Accepts a text string and then removes all wikitext from the
4755          * string and leaves only the resultant text (i.e. the result of
4756          * [[User:WikiSysop|Sysop]] would be "Sysop" and the result of
4757          * [[User:WikiSysop]] would be "User:WikiSysop") - this is intended
4758          * to create valid section anchors by mimicing the output of the
4759          * parser when headings are parsed.
4760          *
4761          * @param $text string Text string to be stripped of wikitext
4762          * for use in a Section anchor
4763          * @return Filtered text string
4764          */
4765         public function stripSectionName( $text ) {
4766                 # Strip internal link markup
4767                 $text = preg_replace('/\[\[:?([^[|]+)\|([^[]+)\]\]/','$2',$text);
4768                 $text = preg_replace('/\[\[:?([^[]+)\|?\]\]/','$1',$text);
4769
4770                 # Strip external link markup (FIXME: Not Tolerant to blank link text
4771                 # I.E. [http://www.mediawiki.org] will render as [1] or something depending
4772                 # on how many empty links there are on the page - need to figure that out.
4773                 $text = preg_replace('/\[(?:' . wfUrlProtocols() . ')([^ ]+?) ([^[]+)\]/','$2',$text);
4774
4775                 # Parse wikitext quotes (italics & bold)
4776                 $text = $this->doQuotes($text);
4777
4778                 # Strip HTML tags
4779                 $text = StringUtils::delimiterReplace( '<', '>', '', $text );
4780                 return $text;
4781         }
4782
4783         function srvus( $text ) {
4784                 return $this->testSrvus( $text, $this->mOutputType );
4785         }
4786
4787         /**
4788          * strip/replaceVariables/unstrip for preprocessor regression testing
4789          */
4790         function testSrvus( $text, $title, $options, $outputType = self::OT_HTML ) {
4791                 $this->clearState();
4792                 if ( ! ( $title instanceof Title ) ) {
4793                         $title = Title::newFromText( $title );
4794                 }
4795                 $this->mTitle = $title;
4796                 $this->mOptions = $options;
4797                 $this->setOutputType( $outputType );
4798                 $text = $this->replaceVariables( $text );
4799                 $text = $this->mStripState->unstripBoth( $text );
4800                 $text = Sanitizer::removeHTMLtags( $text );
4801                 return $text;
4802         }
4803
4804         function testPst( $text, $title, $options ) {
4805                 global $wgUser;
4806                 if ( ! ( $title instanceof Title ) ) {
4807                         $title = Title::newFromText( $title );
4808                 }
4809                 return $this->preSaveTransform( $text, $title, $wgUser, $options );
4810         }
4811
4812         function testPreprocess( $text, $title, $options ) {
4813                 if ( ! ( $title instanceof Title ) ) {
4814                         $title = Title::newFromText( $title );
4815                 }
4816                 return $this->testSrvus( $text, $title, $options, self::OT_PREPROCESS );
4817         }
4818
4819         function markerSkipCallback( $s, $callback ) {
4820                 $i = 0;
4821                 $out = '';
4822                 while ( $i < strlen( $s ) ) {
4823                         $markerStart = strpos( $s, $this->mUniqPrefix, $i );
4824                         if ( $markerStart === false ) {
4825                                 $out .= call_user_func( $callback, substr( $s, $i ) );
4826                                 break;
4827                         } else {
4828                                 $out .= call_user_func( $callback, substr( $s, $i, $markerStart - $i ) );
4829                                 $markerEnd = strpos( $s, self::MARKER_SUFFIX, $markerStart );
4830                                 if ( $markerEnd === false ) {
4831                                         $out .= substr( $s, $markerStart );
4832                                         break;
4833                                 } else {
4834                                         $markerEnd += strlen( self::MARKER_SUFFIX );
4835                                         $out .= substr( $s, $markerStart, $markerEnd - $markerStart );
4836                                         $i = $markerEnd;
4837                                 }
4838                         }
4839                 }
4840                 return $out;
4841         }
4842 }
4843
4844 /**
4845  * @todo document, briefly.
4846  * @addtogroup Parser
4847  */
4848 class StripState {
4849         var $general, $nowiki;
4850
4851         function __construct() {
4852                 $this->general = new ReplacementArray;
4853                 $this->nowiki = new ReplacementArray;
4854         }
4855
4856         function unstripGeneral( $text ) {
4857                 wfProfileIn( __METHOD__ );
4858                 do {
4859                         $oldText = $text;
4860                         $text = $this->general->replace( $text );
4861                 } while ( $text != $oldText );
4862                 wfProfileOut( __METHOD__ );
4863                 return $text;
4864         }
4865
4866         function unstripNoWiki( $text ) {
4867                 wfProfileIn( __METHOD__ );
4868                 do {
4869                         $oldText = $text;
4870                         $text = $this->nowiki->replace( $text );
4871                 } while ( $text != $oldText );
4872                 wfProfileOut( __METHOD__ );
4873                 return $text;
4874         }
4875
4876         function unstripBoth( $text ) {
4877                 wfProfileIn( __METHOD__ );
4878                 do {
4879                         $oldText = $text;
4880                         $text = $this->general->replace( $text );
4881                         $text = $this->nowiki->replace( $text );
4882                 } while ( $text != $oldText );
4883                 wfProfileOut( __METHOD__ );
4884                 return $text;
4885         }
4886 }
4887
4888 /**
4889  * @todo document, briefly.
4890  * @addtogroup Parser
4891  */
4892 class OnlyIncludeReplacer {
4893         var $output = '';
4894
4895         function replace( $matches ) {
4896                 if ( substr( $matches[1], -1 ) == "\n" ) {
4897                         $this->output .= substr( $matches[1], 0, -1 );
4898                 } else {
4899                         $this->output .= $matches[1];
4900                 }
4901         }
4902 }
4903