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         /**#@+
  80          * @private
  81          */
  82         # Persistent:
  83         var $mTagHooks, $mTransparentTagHooks, $mFunctionHooks, $mFunctionSynonyms, $mVariables,
  84                 $mImageParams, $mImageParamsMagicArray, $mStripList, $mMarkerSuffix,
  85                 $mExtLinkBracketedRegex, $mPreprocessor, $mDefaultStripList;
  86
  87
  88         # Cleared with clearState():
  89         var $mOutput, $mAutonumber, $mDTopen, $mStripState;
  90         var $mIncludeCount, $mArgStack, $mLastSection, $mInPre;
  91         var $mInterwikiLinkHolders, $mLinkHolders;
  92         var $mIncludeSizes, $mPPNodeCount, $mDefaultSort;
  93         var $mTplExpandCache; // empty-frame expansion cache
  94         var $mTplRedirCache, $mTplDomCache, $mHeadings;
  95
  96         # Temporary
  97         # These are variables reset at least once per parse regardless of $clearState
  98         var $mOptions,      // ParserOptions object
  99                 $mTitle,        // Title context, used for self-link rendering and similar things
 100                 $mOutputType,   // Output type, one of the OT_xxx constants
 101                 $ot,            // Shortcut alias, see setOutputType()
 102                 $mRevisionId,   // ID to display in {{REVISIONID}} tags
 103                 $mRevisionTimestamp, // The timestamp of the specified revision ID
 104                 $mRevIdForTs;   // The revision ID which was used to fetch the timestamp
 105
 106         /**#@-*/
 107
 108         /**
 109          * Constructor
 110          *
 111          * @public
 112          */
 113         function __construct( $conf = array() ) {
 114                 $this->mTagHooks = array();
 115                 $this->mTransparentTagHooks = array();
 116                 $this->mFunctionHooks = array();
 117                 $this->mFunctionSynonyms = array( 0 => array(), 1 => array() );
 118                 $this->mDefaultStripList = $this->mStripList = array( 'nowiki', 'gallery' );
 119                 $this->mMarkerSuffix = "-QINU\x7f";
 120                 $this->mExtLinkBracketedRegex = '/\[(\b(' . wfUrlProtocols() . ')'.
 121                         '[^][<>"\\x00-\\x20\\x7F]+) *([^\]\\x0a\\x0d]*?)\]/S';
 122                 if ( isset( $conf['preprocessorClass'] ) ) {
 123                         $this->mPreprocessorClass = $conf['preprocessorClass'];
 124                 } else {
 125                         $this->mPreprocessorClass = 'Preprocessor_DOM';
 126                 }
 127                 $this->mFirstCall = true;
 128         }
 129
 130         /**
 131          * Do various kinds of initialisation on the first call of the parser
 132          */
 133         function firstCallInit() {
 134                 if ( !$this->mFirstCall ) {
 135                         return;
 136                 }
 137                 $this->mFirstCall = false;
 138
 139                 wfProfileIn( __METHOD__ );
 140                 global $wgAllowDisplayTitle, $wgAllowSlowParserFunctions;
 141
 142                 $this->setHook( 'pre', array( $this, 'renderPreTag' ) );
 143
 144                 # Syntax for arguments (see self::setFunctionHook):
 145                 #  "name for lookup in localized magic words array",
 146                 #  function callback,
 147                 #  optional SFH_NO_HASH to omit the hash from calls (e.g. {{int:...}
 148                 #    instead of {{#int:...}})
 149                 $this->setFunctionHook( 'int',              array( 'CoreParserFunctions', 'intFunction'      ), SFH_NO_HASH );
 150                 $this->setFunctionHook( 'ns',               array( 'CoreParserFunctions', 'ns'               ), SFH_NO_HASH );
 151                 $this->setFunctionHook( 'urlencode',        array( 'CoreParserFunctions', 'urlencode'        ), SFH_NO_HASH );
 152                 $this->setFunctionHook( 'lcfirst',          array( 'CoreParserFunctions', 'lcfirst'          ), SFH_NO_HASH );
 153                 $this->setFunctionHook( 'ucfirst',          array( 'CoreParserFunctions', 'ucfirst'          ), SFH_NO_HASH );
 154                 $this->setFunctionHook( 'lc',               array( 'CoreParserFunctions', 'lc'               ), SFH_NO_HASH );
 155                 $this->setFunctionHook( 'uc',               array( 'CoreParserFunctions', 'uc'               ), SFH_NO_HASH );
 156                 $this->setFunctionHook( 'localurl',         array( 'CoreParserFunctions', 'localurl'         ), SFH_NO_HASH );
 157                 $this->setFunctionHook( 'localurle',        array( 'CoreParserFunctions', 'localurle'        ), SFH_NO_HASH );
 158                 $this->setFunctionHook( 'fullurl',          array( 'CoreParserFunctions', 'fullurl'          ), SFH_NO_HASH );
 159                 $this->setFunctionHook( 'fullurle',         array( 'CoreParserFunctions', 'fullurle'         ), SFH_NO_HASH );
 160                 $this->setFunctionHook( 'formatnum',        array( 'CoreParserFunctions', 'formatnum'        ), SFH_NO_HASH );
 161                 $this->setFunctionHook( 'grammar',          array( 'CoreParserFunctions', 'grammar'          ), SFH_NO_HASH );
 162                 $this->setFunctionHook( 'plural',           array( 'CoreParserFunctions', 'plural'           ), SFH_NO_HASH );
 163                 $this->setFunctionHook( 'numberofpages',    array( 'CoreParserFunctions', 'numberofpages'    ), SFH_NO_HASH );
 164                 $this->setFunctionHook( 'numberofusers',    array( 'CoreParserFunctions', 'numberofusers'    ), SFH_NO_HASH );
 165                 $this->setFunctionHook( 'numberofarticles', array( 'CoreParserFunctions', 'numberofarticles' ), SFH_NO_HASH );
 166                 $this->setFunctionHook( 'numberoffiles',    array( 'CoreParserFunctions', 'numberoffiles'    ), SFH_NO_HASH );
 167                 $this->setFunctionHook( 'numberofadmins',   array( 'CoreParserFunctions', 'numberofadmins'   ), SFH_NO_HASH );
 168                 $this->setFunctionHook( 'numberofedits',    array( 'CoreParserFunctions', 'numberofedits'    ), SFH_NO_HASH );
 169                 $this->setFunctionHook( 'language',         array( 'CoreParserFunctions', 'language'         ), SFH_NO_HASH );
 170                 $this->setFunctionHook( 'padleft',          array( 'CoreParserFunctions', 'padleft'          ), SFH_NO_HASH );
 171                 $this->setFunctionHook( 'padright',         array( 'CoreParserFunctions', 'padright'         ), SFH_NO_HASH );
 172                 $this->setFunctionHook( 'anchorencode',     array( 'CoreParserFunctions', 'anchorencode'     ), SFH_NO_HASH );
 173                 $this->setFunctionHook( 'special',          array( 'CoreParserFunctions', 'special'          ) );
 174                 $this->setFunctionHook( 'defaultsort',      array( 'CoreParserFunctions', 'defaultsort'      ), SFH_NO_HASH );
 175                 $this->setFunctionHook( 'filepath',         array( 'CoreParserFunctions', 'filepath'         ), SFH_NO_HASH );
 176                 $this->setFunctionHook( 'tag',              array( 'CoreParserFunctions', 'tagObj'           ), SFH_OBJECT_ARGS );
 177
 178                 if ( $wgAllowDisplayTitle ) {
 179                         $this->setFunctionHook( 'displaytitle', array( 'CoreParserFunctions', 'displaytitle' ), SFH_NO_HASH );
 180                 }
 181                 if ( $wgAllowSlowParserFunctions ) {
 182                         $this->setFunctionHook( 'pagesinnamespace', array( 'CoreParserFunctions', 'pagesinnamespace' ), SFH_NO_HASH );
 183                 }
 184
 185                 $this->initialiseVariables();
 186
 187                 wfRunHooks( 'ParserFirstCallInit', array( &$this ) );
 188                 wfProfileOut( __METHOD__ );
 189         }
 190
 191         /**
 192          * Clear Parser state
 193          *
 194          * @private
 195          */
 196         function clearState() {
 197                 wfProfileIn( __METHOD__ );
 198                 if ( $this->mFirstCall ) {
 199                         $this->firstCallInit();
 200                 }
 201                 $this->mOutput = new ParserOutput;
 202                 $this->mAutonumber = 0;
 203                 $this->mLastSection = '';
 204                 $this->mDTopen = false;
 205                 $this->mIncludeCount = array();
 206                 $this->mStripState = new StripState;
 207                 $this->mArgStack = false;
 208                 $this->mInPre = false;
 209                 $this->mInterwikiLinkHolders = array(
 210                         'texts' => array(),
 211                         'titles' => array()
 212                 );
 213                 $this->mLinkHolders = array(
 214                         'namespaces' => array(),
 215                         'dbkeys' => array(),
 216                         'queries' => array(),
 217                         'texts' => array(),
 218                         'titles' => array()
 219                 );
 220                 $this->mRevisionTimestamp = $this->mRevisionId = null;
 221
 222                 /**
 223                  * Prefix for temporary replacement strings for the multipass parser.
 224                  * \x07 should never appear in input as it's disallowed in XML.
 225                  * Using it at the front also gives us a little extra robustness
 226                  * since it shouldn't match when butted up against identifier-like
 227                  * string constructs.
 228                  *
 229                  * Must not consist of all title characters, or else it will change
 230                  * the behaviour of <nowiki> in a link.
 231                  */
 232                 #$this->mUniqPrefix = "\x07UNIQ" . Parser::getRandomString();
 233                 $this->mUniqPrefix = "\x7fUNIQ" . Parser::getRandomString();
 234
 235                 # Clear these on every parse, bug 4549
 236                 $this->mTplExpandCache = $this->mTplRedirCache = $this->mTplDomCache = array();
 237
 238                 $this->mShowToc = true;
 239                 $this->mForceTocPosition = false;
 240                 $this->mIncludeSizes = array(
 241                         'post-expand' => 0,
 242                         'arg' => 0,
 243                 );
 244                 $this->mPPNodeCount = 0;
 245                 $this->mDefaultSort = false;
 246                 $this->mHeadings = array();
 247
 248                 wfRunHooks( 'ParserClearState', array( &$this ) );
 249                 wfProfileOut( __METHOD__ );
 250         }
 251
 252         function setOutputType( $ot ) {
 253                 $this->mOutputType = $ot;
 254                 // Shortcut alias
 255                 $this->ot = array(
 256                         'html' => $ot == OT_HTML,
 257                         'wiki' => $ot == OT_WIKI,
 258                         'pre' => $ot == OT_PREPROCESS,
 259                 );
 260         }
 261
 262         /**
 263          * Set the context title
 264          */
 265         function setTitle( $t ) {
 266                 if ( !$t || $t instanceof FakeTitle ) {
 267                         $t = Title::newFromText( 'NO TITLE' );
 268                 }
 269                 if ( strval( $t->getFragment() ) !== '' ) {
 270                         # Strip the fragment to avoid various odd effects
 271                         $this->mTitle = clone $t;
 272                         $this->mTitle->setFragment( '' );
 273                 } else {
 274                         $this->mTitle = $t;
 275                 }
 276         }
 277
 278         /**
 279          * Accessor for mUniqPrefix.
 280          *
 281          * @public
 282          */
 283         function uniqPrefix() {
 284                 if( !isset( $this->mUniqPrefix ) ) {
 285                         // @fixme this is probably *horribly wrong*
 286                         // LanguageConverter seems to want $wgParser's uniqPrefix, however
 287                         // if this is called for a parser cache hit, the parser may not
 288                         // have ever been initialized in the first place.
 289                         // Not really sure what the heck is supposed to be going on here.
 290                         return '';
 291                         //throw new MWException( "Accessing uninitialized mUniqPrefix" );
 292                 }
 293                 return $this->mUniqPrefix;
 294         }
 295
 296         /**
 297          * Convert wikitext to HTML
 298          * Do not call this function recursively.
 299          *
 300          * @param string $text Text we want to parse
 301          * @param Title &$title A title object
 302          * @param array $options
 303          * @param boolean $linestart
 304          * @param boolean $clearState
 305          * @param int $revid number to pass in {{REVISIONID}}
 306          * @return ParserOutput a ParserOutput
 307          */
 308         public function parse( $text, &$title, $options, $linestart = true, $clearState = true, $revid = null ) {
 309                 /**
 310                  * First pass--just handle <nowiki> sections, pass the rest off
 311                  * to internalParse() which does all the real work.
 312                  */
 313
 314                 global $wgUseTidy, $wgAlwaysUseTidy, $wgContLang;
 315                 $fname = 'Parser::parse-' . wfGetCaller();
 316                 wfProfileIn( __METHOD__ );
 317                 wfProfileIn( $fname );
 318
 319                 if ( $clearState ) {
 320                         $this->clearState();
 321                 }
 322
 323                 $this->mOptions = $options;
 324                 $this->setTitle( $title );
 325                 $oldRevisionId = $this->mRevisionId;
 326                 $oldRevisionTimestamp = $this->mRevisionTimestamp;
 327                 if( $revid !== null ) {
 328                         $this->mRevisionId = $revid;
 329                         $this->mRevisionTimestamp = null;
 330                 }
 331                 $this->setOutputType( OT_HTML );
 332                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$this->mStripState ) );
 333                 # No more strip!
 334                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$this->mStripState ) );
 335                 $text = $this->internalParse( $text );
 336                 $text = $this->mStripState->unstripGeneral( $text );
 337
 338                 # Clean up special characters, only run once, next-to-last before doBlockLevels
 339                 $fixtags = array(
 340                         # french spaces, last one Guillemet-left
 341                         # only if there is something before the space
 342                         '/(.) (?=\\?|:|;|!|%|\\302\\273)/' => '\\1&nbsp;\\2',
 343                         # french spaces, Guillemet-right
 344                         '/(\\302\\253) /' => '\\1&nbsp;',
 345                 );
 346                 $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 347
 348                 # only once and last
 349                 $text = $this->doBlockLevels( $text, $linestart );
 350
 351                 $this->replaceLinkHolders( $text );
 352
 353                 # the position of the parserConvert() call should not be changed. it
 354                 # assumes that the links are all replaced and the only thing left
 355                 # is the <nowiki> mark.
 356                 # Side-effects: this calls $this->mOutput->setTitleText()
 357                 $text = $wgContLang->parserConvert( $text, $this );
 358
 359                 $text = $this->mStripState->unstripNoWiki( $text );
 360
 361                 wfRunHooks( 'ParserBeforeTidy', array( &$this, &$text ) );
 362
 363 //!JF Move to its own function
 364
 365                 $uniq_prefix = $this->mUniqPrefix;
 366                 $matches = array();
 367                 $elements = array_keys( $this->mTransparentTagHooks );
 368                 $text = Parser::extractTagsAndParams( $elements, $text, $matches, $uniq_prefix );
 369
 370                 foreach( $matches as $marker => $data ) {
 371                         list( $element, $content, $params, $tag ) = $data;
 372                         $tagName = strtolower( $element );
 373                         if( isset( $this->mTransparentTagHooks[$tagName] ) ) {
 374                                 $output = call_user_func_array( $this->mTransparentTagHooks[$tagName],
 375                                         array( $content, $params, $this ) );
 376                         } else {
 377                                 $output = $tag;
 378                         }
 379                         $this->mStripState->general->setPair( $marker, $output );
 380                 }
 381                 $text = $this->mStripState->unstripGeneral( $text );
 382
 383                 $text = Sanitizer::normalizeCharReferences( $text );
 384
 385                 if (($wgUseTidy and $this->mOptions->mTidy) or $wgAlwaysUseTidy) {
 386                         $text = Parser::tidy($text);
 387                 } else {
 388                         # attempt to sanitize at least some nesting problems
 389                         # (bug #2702 and quite a few others)
 390                         $tidyregs = array(
 391                                 # ''Something [http://www.cool.com cool''] -->
 392                                 # <i>Something</i><a href="http://www.cool.com"..><i>cool></i></a>
 393                                 '/(<([bi])>)(<([bi])>)?([^<]*)(<\/?a[^<]*>)([^<]*)(<\/\\4>)?(<\/\\2>)/' =>
 394                                 '\\1\\3\\5\\8\\9\\6\\1\\3\\7\\8\\9',
 395                                 # fix up an anchor inside another anchor, only
 396                                 # at least for a single single nested link (bug 3695)
 397                                 '/(<a[^>]+>)([^<]*)(<a[^>]+>[^<]*)<\/a>(.*)<\/a>/' =>
 398                                 '\\1\\2</a>\\3</a>\\1\\4</a>',
 399                                 # fix div inside inline elements- doBlockLevels won't wrap a line which
 400                                 # contains a div, so fix it up here; replace
 401                                 # div with escaped text
 402                                 '/(<([aib]) [^>]+>)([^<]*)(<div([^>]*)>)(.*)(<\/div>)([^<]*)(<\/\\2>)/' =>
 403                                 '\\1\\3&lt;div\\5&gt;\\6&lt;/div&gt;\\8\\9',
 404                                 # remove empty italic or bold tag pairs, some
 405                                 # introduced by rules above
 406                                 '/<([bi])><\/\\1>/' => '',
 407                         );
 408
 409                         $text = preg_replace(
 410                                 array_keys( $tidyregs ),
 411                                 array_values( $tidyregs ),
 412                                 $text );
 413                 }
 414
 415                 wfRunHooks( 'ParserAfterTidy', array( &$this, &$text ) );
 416
 417                 # Information on include size limits, for the benefit of users who try to skirt them
 418                 if ( $this->mOptions->getEnableLimitReport() ) {
 419                         $max = $this->mOptions->getMaxIncludeSize();
 420                         $limitReport =
 421                                 "NewPP limit report\n" .
 422                                 "Preprocessor node count: {$this->mPPNodeCount}/{$this->mOptions->mMaxPPNodeCount}\n" .
 423                                 "Post-expand include size: {$this->mIncludeSizes['post-expand']}/$max bytes\n" .
 424                                 "Template argument size: {$this->mIncludeSizes['arg']}/$max bytes\n";
 425                         wfRunHooks( 'ParserLimitReport', array( $this, &$limitReport ) );
 426                         $text .= "\n<!-- \n$limitReport-->\n";
 427                 }
 428                 $this->mOutput->setText( $text );
 429                 $this->mRevisionId = $oldRevisionId;
 430                 $this->mRevisionTimestamp = $oldRevisionTimestamp;
 431                 wfProfileOut( $fname );
 432                 wfProfileOut( __METHOD__ );
 433
 434                 return $this->mOutput;
 435         }
 436
 437         /**
 438          * Recursive parser entry point that can be called from an extension tag
 439          * hook.
 440          */
 441         function recursiveTagParse( $text ) {
 442                 wfProfileIn( __METHOD__ );
 443                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$this->mStripState ) );
 444                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$this->mStripState ) );
 445                 $text = $this->internalParse( $text );
 446                 wfProfileOut( __METHOD__ );
 447                 return $text;
 448         }
 449
 450         /**
 451          * Expand templates and variables in the text, producing valid, static wikitext.
 452          * Also removes comments.
 453          */
 454         function preprocess( $text, $title, $options, $revid = null ) {
 455                 wfProfileIn( __METHOD__ );
 456                 $this->clearState();
 457                 $this->setOutputType( OT_PREPROCESS );
 458                 $this->mOptions = $options;
 459                 $this->setTitle( $title );
 460                 if( $revid !== null ) {
 461                         $this->mRevisionId = $revid;
 462                 }
 463                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$this->mStripState ) );
 464                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$this->mStripState ) );
 465                 $text = $this->replaceVariables( $text );
 466                 $text = $this->mStripState->unstripBoth( $text );
 467                 wfProfileOut( __METHOD__ );
 468                 return $text;
 469         }
 470
 471         /**
 472          * Get a random string
 473          *
 474          * @private
 475          * @static
 476          */
 477         function getRandomString() {
 478                 return dechex(mt_rand(0, 0x7fffffff)) . dechex(mt_rand(0, 0x7fffffff));
 479         }
 480
 481         function &getTitle() { return $this->mTitle; }
 482         function getOptions() { return $this->mOptions; }
 483
 484         function getFunctionLang() {
 485                 global $wgLang, $wgContLang;
 486                 return $this->mOptions->getInterfaceMessage() ? $wgLang : $wgContLang;
 487         }
 488
 489         /**
 490          * Get a preprocessor object
 491          */
 492         function getPreprocessor() {
 493                 if ( !isset( $this->mPreprocessor ) ) {
 494                         $class = $this->mPreprocessorClass;
 495                         $this->mPreprocessor = new $class( $this );
 496                 }
 497                 return $this->mPreprocessor;
 498         }
 499
 500         /**
 501          * Replaces all occurrences of HTML-style comments and the given tags
 502          * in the text with a random marker and returns teh next text. The output
 503          * parameter $matches will be an associative array filled with data in
 504          * the form:
 505          *   'UNIQ-xxxxx' => array(
 506          *     'element',
 507          *     'tag content',
 508          *     array( 'param' => 'x' ),
 509          *     '<element param="x">tag content</element>' ) )
 510          *
 511          * @param $elements list of element names. Comments are always extracted.
 512          * @param $text Source text string.
 513          * @param $uniq_prefix
 514          *
 515          * @public
 516          * @static
 517          */
 518         function extractTagsAndParams($elements, $text, &$matches, $uniq_prefix = ''){
 519                 static $n = 1;
 520                 $stripped = '';
 521                 $matches = array();
 522
 523                 $taglist = implode( '|', $elements );
 524                 $start = "/<($taglist)(\\s+[^>]*?|\\s*?)(\/?>)|<(!--)/i";
 525
 526                 while ( '' != $text ) {
 527                         $p = preg_split( $start, $text, 2, PREG_SPLIT_DELIM_CAPTURE );
 528                         $stripped .= $p[0];
 529                         if( count( $p ) < 5 ) {
 530                                 break;
 531                         }
 532                         if( count( $p ) > 5 ) {
 533                                 // comment
 534                                 $element    = $p[4];
 535                                 $attributes = '';
 536                                 $close      = '';
 537                                 $inside     = $p[5];
 538                         } else {
 539                                 // tag
 540                                 $element    = $p[1];
 541                                 $attributes = $p[2];
 542                                 $close      = $p[3];
 543                                 $inside     = $p[4];
 544                         }
 545
 546                         $marker = "$uniq_prefix-$element-" . sprintf('%08X', $n++) . $this->mMarkerSuffix;
 547                         $stripped .= $marker;
 548
 549                         if ( $close === '/>' ) {
 550                                 // Empty element tag, <tag />
 551                                 $content = null;
 552                                 $text = $inside;
 553                                 $tail = null;
 554                         } else {
 555                                 if( $element == '!--' ) {
 556                                         $end = '/(-->)/';
 557                                 } else {
 558                                         $end = "/(<\\/$element\\s*>)/i";
 559                                 }
 560                                 $q = preg_split( $end, $inside, 2, PREG_SPLIT_DELIM_CAPTURE );
 561                                 $content = $q[0];
 562                                 if( count( $q ) < 3 ) {
 563                                         # No end tag -- let it run out to the end of the text.
 564                                         $tail = '';
 565                                         $text = '';
 566                                 } else {
 567                                         $tail = $q[1];
 568                                         $text = $q[2];
 569                                 }
 570                         }
 571
 572                         $matches[$marker] = array( $element,
 573                                 $content,
 574                                 Sanitizer::decodeTagAttributes( $attributes ),
 575                                 "<$element$attributes$close$content$tail" );
 576                 }
 577                 return $stripped;
 578         }
 579
 580         /**
 581          * Get a list of strippable XML-like elements
 582          */
 583         function getStripList() {
 584                 global $wgRawHtml;
 585                 $elements = $this->mStripList;
 586                 if( $wgRawHtml ) {
 587                         $elements[] = 'html';
 588                 }
 589                 if( $this->mOptions->getUseTeX() ) {
 590                         $elements[] = 'math';
 591                 }
 592                 return $elements;
 593         }
 594
 595         /**
 596          * @deprecated use replaceVariables
 597          */
 598         function strip( $text, $state, $stripcomments = false , $dontstrip = array () ) {
 599                 return $text;
 600         }
 601
 602         /**
 603          * Restores pre, math, and other extensions removed by strip()
 604          *
 605          * always call unstripNoWiki() after this one
 606          * @private
 607          * @deprecated use $this->mStripState->unstrip()
 608          */
 609         function unstrip( $text, $state ) {
 610                 return $state->unstripGeneral( $text );
 611         }
 612
 613         /**
 614          * Always call this after unstrip() to preserve the order
 615          *
 616          * @private
 617          * @deprecated use $this->mStripState->unstrip()
 618          */
 619         function unstripNoWiki( $text, $state ) {
 620                 return $state->unstripNoWiki( $text );
 621         }
 622
 623         /**
 624          * @deprecated use $this->mStripState->unstripBoth()
 625          */
 626         function unstripForHTML( $text ) {
 627                 return $this->mStripState->unstripBoth( $text );
 628         }
 629
 630         /**
 631          * Add an item to the strip state
 632          * Returns the unique tag which must be inserted into the stripped text
 633          * The tag will be replaced with the original text in unstrip()
 634          *
 635          * @private
 636          */
 637         function insertStripItem( $text ) {
 638                 static $n = 0;
 639                 $rnd = "{$this->mUniqPrefix}-item-$n-{$this->mMarkerSuffix}";
 640                 ++$n;
 641                 $this->mStripState->general->setPair( $rnd, $text );
 642                 return $rnd;
 643         }
 644
 645         /**
 646          * Interface with html tidy, used if $wgUseTidy = true.
 647          * If tidy isn't able to correct the markup, the original will be
 648          * returned in all its glory with a warning comment appended.
 649          *
 650          * Either the external tidy program or the in-process tidy extension
 651          * will be used depending on availability. Override the default
 652          * $wgTidyInternal setting to disable the internal if it's not working.
 653          *
 654          * @param string $text Hideous HTML input
 655          * @return string Corrected HTML output
 656          * @public
 657          * @static
 658          */
 659         function tidy( $text ) {
 660                 global $wgTidyInternal;
 661                 $wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"'.
 662 ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>'.
 663 '<head><title>test</title></head><body>'.$text.'</body></html>';
 664                 if( $wgTidyInternal ) {
 665                         $correctedtext = Parser::internalTidy( $wrappedtext );
 666                 } else {
 667                         $correctedtext = Parser::externalTidy( $wrappedtext );
 668                 }
 669                 if( is_null( $correctedtext ) ) {
 670                         wfDebug( "Tidy error detected!\n" );
 671                         return $text . "\n<!-- Tidy found serious XHTML errors -->\n";
 672                 }
 673                 return $correctedtext;
 674         }
 675
 676         /**
 677          * Spawn an external HTML tidy process and get corrected markup back from it.
 678          *
 679          * @private
 680          * @static
 681          */
 682         function externalTidy( $text ) {
 683                 global $wgTidyConf, $wgTidyBin, $wgTidyOpts;
 684                 $fname = 'Parser::externalTidy';
 685                 wfProfileIn( $fname );
 686
 687                 $cleansource = '';
 688                 $opts = ' -utf8';
 689
 690                 $descriptorspec = array(
 691                         0 => array('pipe', 'r'),
 692                         1 => array('pipe', 'w'),
 693                         2 => array('file', wfGetNull(), 'a')
 694                 );
 695                 $pipes = array();
 696                 $process = proc_open("$wgTidyBin -config $wgTidyConf $wgTidyOpts$opts", $descriptorspec, $pipes);
 697                 if (is_resource($process)) {
 698                         // Theoretically, this style of communication could cause a deadlock
 699                         // here. If the stdout buffer fills up, then writes to stdin could
 700                         // block. This doesn't appear to happen with tidy, because tidy only
 701                         // writes to stdout after it's finished reading from stdin. Search
 702                         // for tidyParseStdin and tidySaveStdout in console/tidy.c
 703                         fwrite($pipes[0], $text);
 704                         fclose($pipes[0]);
 705                         while (!feof($pipes[1])) {
 706                                 $cleansource .= fgets($pipes[1], 1024);
 707                         }
 708                         fclose($pipes[1]);
 709                         proc_close($process);
 710                 }
 711
 712                 wfProfileOut( $fname );
 713
 714                 if( $cleansource == '' && $text != '') {
 715                         // Some kind of error happened, so we couldn't get the corrected text.
 716                         // Just give up; we'll use the source text and append a warning.
 717                         return null;
 718                 } else {
 719                         return $cleansource;
 720                 }
 721         }
 722
 723         /**
 724          * Use the HTML tidy PECL extension to use the tidy library in-process,
 725          * saving the overhead of spawning a new process.
 726          *
 727          * 'pear install tidy' should be able to compile the extension module.
 728          *
 729          * @private
 730          * @static
 731          */
 732         function internalTidy( $text ) {
 733                 global $wgTidyConf, $IP, $wgDebugTidy;
 734                 $fname = 'Parser::internalTidy';
 735                 wfProfileIn( $fname );
 736
 737                 $tidy = new tidy;
 738                 $tidy->parseString( $text, $wgTidyConf, 'utf8' );
 739                 $tidy->cleanRepair();
 740                 if( $tidy->getStatus() == 2 ) {
 741                         // 2 is magic number for fatal error
 742                         // http://www.php.net/manual/en/function.tidy-get-status.php
 743                         $cleansource = null;
 744                 } else {
 745                         $cleansource = tidy_get_output( $tidy );
 746                 }
 747                 if ( $wgDebugTidy && $tidy->getStatus() > 0 ) {
 748                         $cleansource .= "<!--\nTidy reports:\n" .
 749                                 str_replace( '-->', '--&gt;', $tidy->errorBuffer ) .
 750                                 "\n-->";
 751                 }
 752
 753                 wfProfileOut( $fname );
 754                 return $cleansource;
 755         }
 756
 757         /**
 758          * parse the wiki syntax used to render tables
 759          *
 760          * @private
 761          */
 762         function doTableStuff ( $text ) {
 763                 $fname = 'Parser::doTableStuff';
 764                 wfProfileIn( $fname );
 765
 766                 $lines = explode ( "\n" , $text );
 767                 $td_history = array (); // Is currently a td tag open?
 768                 $last_tag_history = array (); // Save history of last lag activated (td, th or caption)
 769                 $tr_history = array (); // Is currently a tr tag open?
 770                 $tr_attributes = array (); // history of tr attributes
 771                 $has_opened_tr = array(); // Did this table open a <tr> element?
 772                 $indent_level = 0; // indent level of the table
 773                 foreach ( $lines as $key => $line )
 774                 {
 775                         $line = trim ( $line );
 776
 777                         if( $line == '' ) { // empty line, go to next line
 778                                 continue;
 779                         }
 780                         $first_character = $line{0};
 781                         $matches = array();
 782
 783                         if ( preg_match( '/^(:*)\{\|(.*)$/' , $line , $matches ) ) {
 784                                 // First check if we are starting a new table
 785                                 $indent_level = strlen( $matches[1] );
 786
 787                                 $attributes = $this->mStripState->unstripBoth( $matches[2] );
 788                                 $attributes = Sanitizer::fixTagAttributes ( $attributes , 'table' );
 789
 790                                 $lines[$key] = str_repeat( '<dl><dd>' , $indent_level ) . "<table{$attributes}>";
 791                                 array_push ( $td_history , false );
 792                                 array_push ( $last_tag_history , '' );
 793                                 array_push ( $tr_history , false );
 794                                 array_push ( $tr_attributes , '' );
 795                                 array_push ( $has_opened_tr , false );
 796                         } else if ( count ( $td_history ) == 0 ) {
 797                                 // Don't do any of the following
 798                                 continue;
 799                         } else if ( substr ( $line , 0 , 2 ) == '|}' ) {
 800                                 // We are ending a table
 801                                 $line = '</table>' . substr ( $line , 2 );
 802                                 $last_tag = array_pop ( $last_tag_history );
 803
 804                                 if ( !array_pop ( $has_opened_tr ) ) {
 805                                         $line = "<tr><td></td></tr>{$line}";
 806                                 }
 807
 808                                 if ( array_pop ( $tr_history ) ) {
 809                                         $line = "</tr>{$line}";
 810                                 }
 811
 812                                 if ( array_pop ( $td_history ) ) {
 813                                         $line = "</{$last_tag}>{$line}";
 814                                 }
 815                                 array_pop ( $tr_attributes );
 816                                 $lines[$key] = $line . str_repeat( '</dd></dl>' , $indent_level );
 817                         } else if ( substr ( $line , 0 , 2 ) == '|-' ) {
 818                                 // Now we have a table row
 819                                 $line = preg_replace( '#^\|-+#', '', $line );
 820
 821                                 // Whats after the tag is now only attributes
 822                                 $attributes = $this->mStripState->unstripBoth( $line );
 823                                 $attributes = Sanitizer::fixTagAttributes ( $attributes , 'tr' );
 824                                 array_pop ( $tr_attributes );
 825                                 array_push ( $tr_attributes , $attributes );
 826
 827                                 $line = '';
 828                                 $last_tag = array_pop ( $last_tag_history );
 829                                 array_pop ( $has_opened_tr );
 830                                 array_push ( $has_opened_tr , true );
 831
 832                                 if ( array_pop ( $tr_history ) ) {
 833                                         $line = '</tr>';
 834                                 }
 835
 836                                 if ( array_pop ( $td_history ) ) {
 837                                         $line = "</{$last_tag}>{$line}";
 838                                 }
 839
 840                                 $lines[$key] = $line;
 841                                 array_push ( $tr_history , false );
 842                                 array_push ( $td_history , false );
 843                                 array_push ( $last_tag_history , '' );
 844                         }
 845                         else if ( $first_character == '|' || $first_character == '!' || substr ( $line , 0 , 2 )  == '|+' ) {
 846                                 // This might be cell elements, td, th or captions
 847                                 if ( substr ( $line , 0 , 2 ) == '|+' ) {
 848                                         $first_character = '+';
 849                                         $line = substr ( $line , 1 );
 850                                 }
 851
 852                                 $line = substr ( $line , 1 );
 853
 854                                 if ( $first_character == '!' ) {
 855                                         $line = str_replace ( '!!' , '||' , $line );
 856                                 }
 857
 858                                 // Split up multiple cells on the same line.
 859                                 // FIXME : This can result in improper nesting of tags processed
 860                                 // by earlier parser steps, but should avoid splitting up eg
 861                                 // attribute values containing literal "||".
 862                                 $cells = StringUtils::explodeMarkup( '||' , $line );
 863
 864                                 $lines[$key] = '';
 865
 866                                 // Loop through each table cell
 867                                 foreach ( $cells as $cell )
 868                                 {
 869                                         $previous = '';
 870                                         if ( $first_character != '+' )
 871                                         {
 872                                                 $tr_after = array_pop ( $tr_attributes );
 873                                                 if ( !array_pop ( $tr_history ) ) {
 874                                                         $previous = "<tr{$tr_after}>\n";
 875                                                 }
 876                                                 array_push ( $tr_history , true );
 877                                                 array_push ( $tr_attributes , '' );
 878                                                 array_pop ( $has_opened_tr );
 879                                                 array_push ( $has_opened_tr , true );
 880                                         }
 881
 882                                         $last_tag = array_pop ( $last_tag_history );
 883
 884                                         if ( array_pop ( $td_history ) ) {
 885                                                 $previous = "</{$last_tag}>{$previous}";
 886                                         }
 887
 888                                         if ( $first_character == '|' ) {
 889                                                 $last_tag = 'td';
 890                                         } else if ( $first_character == '!' ) {
 891                                                 $last_tag = 'th';
 892                                         } else if ( $first_character == '+' ) {
 893                                                 $last_tag = 'caption';
 894                                         } else {
 895                                                 $last_tag = '';
 896                                         }
 897
 898                                         array_push ( $last_tag_history , $last_tag );
 899
 900                                         // A cell could contain both parameters and data
 901                                         $cell_data = explode ( '|' , $cell , 2 );
 902
 903                                         // Bug 553: Note that a '|' inside an invalid link should not
 904                                         // be mistaken as delimiting cell parameters
 905                                         if ( strpos( $cell_data[0], '[[' ) !== false ) {
 906                                                 $cell = "{$previous}<{$last_tag}>{$cell}";
 907                                         } else if ( count ( $cell_data ) == 1 )
 908                                                 $cell = "{$previous}<{$last_tag}>{$cell_data[0]}";
 909                                         else {
 910                                                 $attributes = $this->mStripState->unstripBoth( $cell_data[0] );
 911                                                 $attributes = Sanitizer::fixTagAttributes( $attributes , $last_tag );
 912                                                 $cell = "{$previous}<{$last_tag}{$attributes}>{$cell_data[1]}";
 913                                         }
 914
 915                                         $lines[$key] .= $cell;
 916                                         array_push ( $td_history , true );
 917                                 }
 918                         }
 919                 }
 920
 921                 // Closing open td, tr && table
 922                 while ( count ( $td_history ) > 0 )
 923                 {
 924                         if ( array_pop ( $td_history ) ) {
 925                                 $lines[] = '</td>' ;
 926                         }
 927                         if ( array_pop ( $tr_history ) ) {
 928                                 $lines[] = '</tr>' ;
 929                         }
 930                         if ( !array_pop ( $has_opened_tr ) ) {
 931                                 $lines[] = "<tr><td></td></tr>" ;
 932                         }
 933
 934                         $lines[] = '</table>' ;
 935                 }
 936
 937                 $output = implode ( "\n" , $lines ) ;
 938
 939                 // special case: don't return empty table
 940                 if( $output == "<table>\n<tr><td></td></tr>\n</table>" ) {
 941                         $output = '';
 942                 }
 943
 944                 wfProfileOut( $fname );
 945
 946                 return $output;
 947         }
 948
 949         /**
 950          * Helper function for parse() that transforms wiki markup into
 951          * HTML. Only called for $mOutputType == OT_HTML.
 952          *
 953          * @private
 954          */
 955         function internalParse( $text ) {
 956                 $isMain = true;
 957                 $fname = 'Parser::internalParse';
 958                 wfProfileIn( $fname );
 959
 960                 # Hook to suspend the parser in this state
 961                 if ( !wfRunHooks( 'ParserBeforeInternalParse', array( &$this, &$text, &$this->mStripState ) ) ) {
 962                         wfProfileOut( $fname );
 963                         return $text ;
 964                 }
 965
 966                 $text = $this->replaceVariables( $text );
 967                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'attributeStripCallback' ), false, array_keys( $this->mTransparentTagHooks ) );
 968                 wfRunHooks( 'InternalParseBeforeLinks', array( &$this, &$text, &$this->mStripState ) );
 969
 970                 // Tables need to come after variable replacement for things to work
 971                 // properly; putting them before other transformations should keep
 972                 // exciting things like link expansions from showing up in surprising
 973                 // places.
 974                 $text = $this->doTableStuff( $text );
 975
 976                 $text = preg_replace( '/(^|\n)-----*/', '\\1<hr />', $text );
 977
 978                 $text = $this->stripToc( $text );
 979                 $this->stripNoGallery( $text );
 980                 $text = $this->doHeadings( $text );
 981                 if($this->mOptions->getUseDynamicDates()) {
 982                         $df =& DateFormatter::getInstance();
 983                         $text = $df->reformat( $this->mOptions->getDateFormat(), $text );
 984                 }
 985                 $text = $this->doAllQuotes( $text );
 986                 $text = $this->replaceInternalLinks( $text );
 987                 $text = $this->replaceExternalLinks( $text );
 988
 989                 # replaceInternalLinks may sometimes leave behind
 990                 # absolute URLs, which have to be masked to hide them from replaceExternalLinks
 991                 $text = str_replace($this->mUniqPrefix."NOPARSE", "", $text);
 992
 993                 $text = $this->doMagicLinks( $text );
 994                 $text = $this->formatHeadings( $text, $isMain );
 995
 996                 wfProfileOut( $fname );
 997                 return $text;
 998         }
 999
1000         /**
1001          * Replace special strings like "ISBN xxx" and "RFC xxx" with
1002          * magic external links.
1003          *
1004          * @private
1005          */
1006         function doMagicLinks( $text ) {
1007                 wfProfileIn( __METHOD__ );
1008                 $text = preg_replace_callback(
1009                         '!(?:                           # Start cases
1010                             <a.*?</a> |                 # Skip link text
1011                             <.*?> |                     # Skip stuff inside HTML elements
1012                             (?:RFC|PMID)\s+([0-9]+) |   # RFC or PMID, capture number as m[1]
1013                             ISBN\s+(\b                  # ISBN, capture number as m[2]
1014                                      (?: 97[89] [\ \-]? )?   # optional 13-digit ISBN prefix
1015                                      (?: [0-9]  [\ \-]? ){9} # 9 digits with opt. delimiters
1016                                      [0-9Xx]                 # check digit
1017                                    \b)
1018                         )!x', array( &$this, 'magicLinkCallback' ), $text );
1019                 wfProfileOut( __METHOD__ );
1020                 return $text;
1021         }
1022
1023         function magicLinkCallback( $m ) {
1024                 if ( substr( $m[0], 0, 1 ) == '<' ) {
1025                         # Skip HTML element
1026                         return $m[0];
1027                 } elseif ( substr( $m[0], 0, 4 ) == 'ISBN' ) {
1028                         $isbn = $m[2];
1029                         $num = strtr( $isbn, array(
1030                                 '-' => '',
1031                                 ' ' => '',
1032                                 'x' => 'X',
1033                         ));
1034                         $titleObj = SpecialPage::getTitleFor( 'Booksources' );
1035                         $text = '<a href="' .
1036                                 $titleObj->escapeLocalUrl( "isbn=$num" ) .
1037                                 "\" class=\"internal\">ISBN $isbn</a>";
1038                 } else {
1039                         if ( substr( $m[0], 0, 3 ) == 'RFC' ) {
1040                                 $keyword = 'RFC';
1041                                 $urlmsg = 'rfcurl';
1042                                 $id = $m[1];
1043                         } elseif ( substr( $m[0], 0, 4 ) == 'PMID' ) {
1044                                 $keyword = 'PMID';
1045                                 $urlmsg = 'pubmedurl';
1046                                 $id = $m[1];
1047                         } else {
1048                                 throw new MWException( __METHOD__.': unrecognised match type "' .
1049                                         substr($m[0], 0, 20 ) . '"' );
1050                         }
1051
1052                         $url = wfMsg( $urlmsg, $id);
1053                         $sk = $this->mOptions->getSkin();
1054                         $la = $sk->getExternalLinkAttributes( $url, $keyword.$id );
1055                         $text = "<a href=\"{$url}\"{$la}>{$keyword} {$id}</a>";
1056                 }
1057                 return $text;
1058         }
1059
1060         /**
1061          * Parse headers and return html
1062          *
1063          * @private
1064          */
1065         function doHeadings( $text ) {
1066                 $fname = 'Parser::doHeadings';
1067                 wfProfileIn( $fname );
1068                 for ( $i = 6; $i >= 1; --$i ) {
1069                         $h = str_repeat( '=', $i );
1070                         $text = preg_replace( "/^$h(.+)$h\\s*$/m",
1071                           "<h$i>\\1</h$i>", $text );
1072                 }
1073                 wfProfileOut( $fname );
1074                 return $text;
1075         }
1076
1077         /**
1078          * Replace single quotes with HTML markup
1079          * @private
1080          * @return string the altered text
1081          */
1082         function doAllQuotes( $text ) {
1083                 $fname = 'Parser::doAllQuotes';
1084                 wfProfileIn( $fname );
1085                 $outtext = '';
1086                 $lines = explode( "\n", $text );
1087                 foreach ( $lines as $line ) {
1088                         $outtext .= $this->doQuotes ( $line ) . "\n";
1089                 }
1090                 $outtext = substr($outtext, 0,-1);
1091                 wfProfileOut( $fname );
1092                 return $outtext;
1093         }
1094
1095         /**
1096          * Helper function for doAllQuotes()
1097          */
1098         public function doQuotes( $text ) {
1099                 $arr = preg_split( "/(''+)/", $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1100                 if ( count( $arr ) == 1 )
1101                         return $text;
1102                 else
1103                 {
1104                         # First, do some preliminary work. This may shift some apostrophes from
1105                         # being mark-up to being text. It also counts the number of occurrences
1106                         # of bold and italics mark-ups.
1107                         $i = 0;
1108                         $numbold = 0;
1109                         $numitalics = 0;
1110                         foreach ( $arr as $r )
1111                         {
1112                                 if ( ( $i % 2 ) == 1 )
1113                                 {
1114                                         # If there are ever four apostrophes, assume the first is supposed to
1115                                         # be text, and the remaining three constitute mark-up for bold text.
1116                                         if ( strlen( $arr[$i] ) == 4 )
1117                                         {
1118                                                 $arr[$i-1] .= "'";
1119                                                 $arr[$i] = "'''";
1120                                         }
1121                                         # If there are more than 5 apostrophes in a row, assume they're all
1122                                         # text except for the last 5.
1123                                         else if ( strlen( $arr[$i] ) > 5 )
1124                                         {
1125                                                 $arr[$i-1] .= str_repeat( "'", strlen( $arr[$i] ) - 5 );
1126                                                 $arr[$i] = "'''''";
1127                                         }
1128                                         # Count the number of occurrences of bold and italics mark-ups.
1129                                         # We are not counting sequences of five apostrophes.
1130                                         if ( strlen( $arr[$i] ) == 2 )      { $numitalics++;             }
1131                                         else if ( strlen( $arr[$i] ) == 3 ) { $numbold++;                }
1132                                         else if ( strlen( $arr[$i] ) == 5 ) { $numitalics++; $numbold++; }
1133                                 }
1134                                 $i++;
1135                         }
1136
1137                         # If there is an odd number of both bold and italics, it is likely
1138                         # that one of the bold ones was meant to be an apostrophe followed
1139                         # by italics. Which one we cannot know for certain, but it is more
1140                         # likely to be one that has a single-letter word before it.
1141                         if ( ( $numbold % 2 == 1 ) && ( $numitalics % 2 == 1 ) )
1142                         {
1143                                 $i = 0;
1144                                 $firstsingleletterword = -1;
1145                                 $firstmultiletterword = -1;
1146                                 $firstspace = -1;
1147                                 foreach ( $arr as $r )
1148                                 {
1149                                         if ( ( $i % 2 == 1 ) and ( strlen( $r ) == 3 ) )
1150                                         {
1151                                                 $x1 = substr ($arr[$i-1], -1);
1152                                                 $x2 = substr ($arr[$i-1], -2, 1);
1153                                                 if ($x1 == ' ') {
1154                                                         if ($firstspace == -1) $firstspace = $i;
1155                                                 } else if ($x2 == ' ') {
1156                                                         if ($firstsingleletterword == -1) $firstsingleletterword = $i;
1157                                                 } else {
1158                                                         if ($firstmultiletterword == -1) $firstmultiletterword = $i;
1159                                                 }
1160                                         }
1161                                         $i++;
1162                                 }
1163
1164                                 # If there is a single-letter word, use it!
1165                                 if ($firstsingleletterword > -1)
1166                                 {
1167                                         $arr [ $firstsingleletterword ] = "''";
1168                                         $arr [ $firstsingleletterword-1 ] .= "'";
1169                                 }
1170                                 # If not, but there's a multi-letter word, use that one.
1171                                 else if ($firstmultiletterword > -1)
1172                                 {
1173                                         $arr [ $firstmultiletterword ] = "''";
1174                                         $arr [ $firstmultiletterword-1 ] .= "'";
1175                                 }
1176                                 # ... otherwise use the first one that has neither.
1177                                 # (notice that it is possible for all three to be -1 if, for example,
1178                                 # there is only one pentuple-apostrophe in the line)
1179                                 else if ($firstspace > -1)
1180                                 {
1181                                         $arr [ $firstspace ] = "''";
1182                                         $arr [ $firstspace-1 ] .= "'";
1183                                 }
1184                         }
1185
1186                         # Now let's actually convert our apostrophic mush to HTML!
1187                         $output = '';
1188                         $buffer = '';
1189                         $state = '';
1190                         $i = 0;
1191                         foreach ($arr as $r)
1192                         {
1193                                 if (($i % 2) == 0)
1194                                 {
1195                                         if ($state == 'both')
1196                                                 $buffer .= $r;
1197                                         else
1198                                                 $output .= $r;
1199                                 }
1200                                 else
1201                                 {
1202                                         if (strlen ($r) == 2)
1203                                         {
1204                                                 if ($state == 'i')
1205                                                 { $output .= '</i>'; $state = ''; }
1206                                                 else if ($state == 'bi')
1207                                                 { $output .= '</i>'; $state = 'b'; }
1208                                                 else if ($state == 'ib')
1209                                                 { $output .= '</b></i><b>'; $state = 'b'; }
1210                                                 else if ($state == 'both')
1211                                                 { $output .= '<b><i>'.$buffer.'</i>'; $state = 'b'; }
1212                                                 else # $state can be 'b' or ''
1213                                                 { $output .= '<i>'; $state .= 'i'; }
1214                                         }
1215                                         else if (strlen ($r) == 3)
1216                                         {
1217                                                 if ($state == 'b')
1218                                                 { $output .= '</b>'; $state = ''; }
1219                                                 else if ($state == 'bi')
1220                                                 { $output .= '</i></b><i>'; $state = 'i'; }
1221                                                 else if ($state == 'ib')
1222                                                 { $output .= '</b>'; $state = 'i'; }
1223                                                 else if ($state == 'both')
1224                                                 { $output .= '<i><b>'.$buffer.'</b>'; $state = 'i'; }
1225                                                 else # $state can be 'i' or ''
1226                                                 { $output .= '<b>'; $state .= 'b'; }
1227                                         }
1228                                         else if (strlen ($r) == 5)
1229                                         {
1230                                                 if ($state == 'b')
1231                                                 { $output .= '</b><i>'; $state = 'i'; }
1232                                                 else if ($state == 'i')
1233                                                 { $output .= '</i><b>'; $state = 'b'; }
1234                                                 else if ($state == 'bi')
1235                                                 { $output .= '</i></b>'; $state = ''; }
1236                                                 else if ($state == 'ib')
1237                                                 { $output .= '</b></i>'; $state = ''; }
1238                                                 else if ($state == 'both')
1239                                                 { $output .= '<i><b>'.$buffer.'</b></i>'; $state = ''; }
1240                                                 else # ($state == '')
1241                                                 { $buffer = ''; $state = 'both'; }
1242                                         }
1243                                 }
1244                                 $i++;
1245                         }
1246                         # Now close all remaining tags.  Notice that the order is important.
1247                         if ($state == 'b' || $state == 'ib')
1248                                 $output .= '</b>';
1249                         if ($state == 'i' || $state == 'bi' || $state == 'ib')
1250                                 $output .= '</i>';
1251                         if ($state == 'bi')
1252                                 $output .= '</b>';
1253                         # There might be lonely ''''', so make sure we have a buffer
1254                         if ($state == 'both' && $buffer)
1255                                 $output .= '<b><i>'.$buffer.'</i></b>';
1256                         return $output;
1257                 }
1258         }
1259
1260         /**
1261          * Replace external links
1262          *
1263          * Note: this is all very hackish and the order of execution matters a lot.
1264          * Make sure to run maintenance/parserTests.php if you change this code.
1265          *
1266          * @private
1267          */
1268         function replaceExternalLinks( $text ) {
1269                 global $wgContLang;
1270                 $fname = 'Parser::replaceExternalLinks';
1271                 wfProfileIn( $fname );
1272
1273                 $sk = $this->mOptions->getSkin();
1274
1275                 $bits = preg_split( $this->mExtLinkBracketedRegex, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1276
1277                 $s = $this->replaceFreeExternalLinks( array_shift( $bits ) );
1278
1279                 $i = 0;
1280                 while ( $i<count( $bits ) ) {
1281                         $url = $bits[$i++];
1282                         $protocol = $bits[$i++];
1283                         $text = $bits[$i++];
1284                         $trail = $bits[$i++];
1285
1286                         # The characters '<' and '>' (which were escaped by
1287                         # removeHTMLtags()) should not be included in
1288                         # URLs, per RFC 2396.
1289                         $m2 = array();
1290                         if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1291                                 $text = substr($url, $m2[0][1]) . ' ' . $text;
1292                                 $url = substr($url, 0, $m2[0][1]);
1293                         }
1294
1295                         # If the link text is an image URL, replace it with an <img> tag
1296                         # This happened by accident in the original parser, but some people used it extensively
1297                         $img = $this->maybeMakeExternalImage( $text );
1298                         if ( $img !== false ) {
1299                                 $text = $img;
1300                         }
1301
1302                         $dtrail = '';
1303
1304                         # Set linktype for CSS - if URL==text, link is essentially free
1305                         $linktype = ($text == $url) ? 'free' : 'text';
1306
1307                         # No link text, e.g. [http://domain.tld/some.link]
1308                         if ( $text == '' ) {
1309                                 # Autonumber if allowed. See bug #5918
1310                                 if ( strpos( wfUrlProtocols(), substr($protocol, 0, strpos($protocol, ':')) ) !== false ) {
1311                                         $text = '[' . ++$this->mAutonumber . ']';
1312                                         $linktype = 'autonumber';
1313                                 } else {
1314                                         # Otherwise just use the URL
1315                                         $text = htmlspecialchars( $url );
1316                                         $linktype = 'free';
1317                                 }
1318                         } else {
1319                                 # Have link text, e.g. [http://domain.tld/some.link text]s
1320                                 # Check for trail
1321                                 list( $dtrail, $trail ) = Linker::splitTrail( $trail );
1322                         }
1323
1324                         $text = $wgContLang->markNoConversion($text);
1325
1326                         $url = Sanitizer::cleanUrl( $url );
1327
1328                         # Process the trail (i.e. everything after this link up until start of the next link),
1329                         # replacing any non-bracketed links
1330                         $trail = $this->replaceFreeExternalLinks( $trail );
1331
1332                         # Use the encoded URL
1333                         # This means that users can paste URLs directly into the text
1334                         # Funny characters like &ouml; aren't valid in URLs anyway
1335                         # This was changed in August 2004
1336                         $s .= $sk->makeExternalLink( $url, $text, false, $linktype, $this->mTitle->getNamespace() ) . $dtrail . $trail;
1337
1338                         # Register link in the output object.
1339                         # Replace unnecessary URL escape codes with the referenced character
1340                         # This prevents spammers from hiding links from the filters
1341                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1342                         $this->mOutput->addExternalLink( $pasteurized );
1343                 }
1344
1345                 wfProfileOut( $fname );
1346                 return $s;
1347         }
1348
1349         /**
1350          * Replace anything that looks like a URL with a link
1351          * @private
1352          */
1353         function replaceFreeExternalLinks( $text ) {
1354                 global $wgContLang;
1355                 $fname = 'Parser::replaceFreeExternalLinks';
1356                 wfProfileIn( $fname );
1357
1358                 $bits = preg_split( '/(\b(?:' . wfUrlProtocols() . '))/S', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1359                 $s = array_shift( $bits );
1360                 $i = 0;
1361
1362                 $sk = $this->mOptions->getSkin();
1363
1364                 while ( $i < count( $bits ) ){
1365                         $protocol = $bits[$i++];
1366                         $remainder = $bits[$i++];
1367
1368                         $m = array();
1369                         if ( preg_match( '/^('.self::EXT_LINK_URL_CLASS.'+)(.*)$/s', $remainder, $m ) ) {
1370                                 # Found some characters after the protocol that look promising
1371                                 $url = $protocol . $m[1];
1372                                 $trail = $m[2];
1373
1374                                 # special case: handle urls as url args:
1375                                 # http://www.example.com/foo?=http://www.example.com/bar
1376                                 if(strlen($trail) == 0 &&
1377                                         isset($bits[$i]) &&
1378                                         preg_match('/^'. wfUrlProtocols() . '$/S', $bits[$i]) &&
1379                                         preg_match( '/^('.self::EXT_LINK_URL_CLASS.'+)(.*)$/s', $bits[$i + 1], $m ))
1380                                 {
1381                                         # add protocol, arg
1382                                         $url .= $bits[$i] . $m[1]; # protocol, url as arg to previous link
1383                                         $i += 2;
1384                                         $trail = $m[2];
1385                                 }
1386
1387                                 # The characters '<' and '>' (which were escaped by
1388                                 # removeHTMLtags()) should not be included in
1389                                 # URLs, per RFC 2396.
1390                                 $m2 = array();
1391                                 if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1392                                         $trail = substr($url, $m2[0][1]) . $trail;
1393                                         $url = substr($url, 0, $m2[0][1]);
1394                                 }
1395
1396                                 # Move trailing punctuation to $trail
1397                                 $sep = ',;\.:!?';
1398                                 # If there is no left bracket, then consider right brackets fair game too
1399                                 if ( strpos( $url, '(' ) === false ) {
1400                                         $sep .= ')';
1401                                 }
1402
1403                                 $numSepChars = strspn( strrev( $url ), $sep );
1404                                 if ( $numSepChars ) {
1405                                         $trail = substr( $url, -$numSepChars ) . $trail;
1406                                         $url = substr( $url, 0, -$numSepChars );
1407                                 }
1408
1409                                 $url = Sanitizer::cleanUrl( $url );
1410
1411                                 # Is this an external image?
1412                                 $text = $this->maybeMakeExternalImage( $url );
1413                                 if ( $text === false ) {
1414                                         # Not an image, make a link
1415                                         $text = $sk->makeExternalLink( $url, $wgContLang->markNoConversion($url), true, 'free', $this->mTitle->getNamespace() );
1416                                         # Register it in the output object...
1417                                         # Replace unnecessary URL escape codes with their equivalent characters
1418                                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1419                                         $this->mOutput->addExternalLink( $pasteurized );
1420                                 }
1421                                 $s .= $text . $trail;
1422                         } else {
1423                                 $s .= $protocol . $remainder;
1424                         }
1425                 }
1426                 wfProfileOut( $fname );
1427                 return $s;
1428         }
1429
1430         /**
1431          * Replace unusual URL escape codes with their equivalent characters
1432          * @param string
1433          * @return string
1434          * @static
1435          * @todo  This can merge genuinely required bits in the path or query string,
1436          *        breaking legit URLs. A proper fix would treat the various parts of
1437          *        the URL differently; as a workaround, just use the output for
1438          *        statistical records, not for actual linking/output.
1439          */
1440         static function replaceUnusualEscapes( $url ) {
1441                 return preg_replace_callback( '/%[0-9A-Fa-f]{2}/',
1442                         array( 'Parser', 'replaceUnusualEscapesCallback' ), $url );
1443         }
1444
1445         /**
1446          * Callback function used in replaceUnusualEscapes().
1447          * Replaces unusual URL escape codes with their equivalent character
1448          * @static
1449          * @private
1450          */
1451         private static function replaceUnusualEscapesCallback( $matches ) {
1452                 $char = urldecode( $matches[0] );
1453                 $ord = ord( $char );
1454                 // Is it an unsafe or HTTP reserved character according to RFC 1738?
1455                 if ( $ord > 32 && $ord < 127 && strpos( '<>"#{}|\^~[]`;/?', $char ) === false ) {
1456                         // No, shouldn't be escaped
1457                         return $char;
1458                 } else {
1459                         // Yes, leave it escaped
1460                         return $matches[0];
1461                 }
1462         }
1463
1464         /**
1465          * make an image if it's allowed, either through the global
1466          * option or through the exception
1467          * @private
1468          */
1469         function maybeMakeExternalImage( $url ) {
1470                 $sk = $this->mOptions->getSkin();
1471                 $imagesfrom = $this->mOptions->getAllowExternalImagesFrom();
1472                 $imagesexception = !empty($imagesfrom);
1473                 $text = false;
1474                 if ( $this->mOptions->getAllowExternalImages()
1475                      || ( $imagesexception && strpos( $url, $imagesfrom ) === 0 ) ) {
1476                         if ( preg_match( self::EXT_IMAGE_REGEX, $url ) ) {
1477                                 # Image found
1478                                 $text = $sk->makeExternalImage( htmlspecialchars( $url ) );
1479                         }
1480                 }
1481                 return $text;
1482         }
1483
1484         /**
1485          * Process [[ ]] wikilinks
1486          *
1487          * @private
1488          */
1489         function replaceInternalLinks( $s ) {
1490                 global $wgContLang;
1491                 static $fname = 'Parser::replaceInternalLinks' ;
1492
1493                 wfProfileIn( $fname );
1494
1495                 wfProfileIn( $fname.'-setup' );
1496                 static $tc = FALSE;
1497                 # the % is needed to support urlencoded titles as well
1498                 if ( !$tc ) { $tc = Title::legalChars() . '#%'; }
1499
1500                 $sk = $this->mOptions->getSkin();
1501
1502                 #split the entire text string on occurences of [[
1503                 $a = explode( '[[', ' ' . $s );
1504                 #get the first element (all text up to first [[), and remove the space we added
1505                 $s = array_shift( $a );
1506                 $s = substr( $s, 1 );
1507
1508                 # Match a link having the form [[namespace:link|alternate]]trail
1509                 static $e1 = FALSE;
1510                 if ( !$e1 ) { $e1 = "/^([{$tc}]+)(?:\\|(.+?))?]](.*)\$/sD"; }
1511                 # Match cases where there is no "]]", which might still be images
1512                 static $e1_img = FALSE;
1513                 if ( !$e1_img ) { $e1_img = "/^([{$tc}]+)\\|(.*)\$/sD"; }
1514
1515                 $useLinkPrefixExtension = $wgContLang->linkPrefixExtension();
1516                 $e2 = null;
1517                 if ( $useLinkPrefixExtension ) {
1518                         # Match the end of a line for a word that's not followed by whitespace,
1519                         # e.g. in the case of 'The Arab al[[Razi]]', 'al' will be matched
1520                         $e2 = wfMsgForContent( 'linkprefix' );
1521                 }
1522
1523                 if( is_null( $this->mTitle ) ) {
1524                         throw new MWException( __METHOD__.": \$this->mTitle is null\n" );
1525                 }
1526                 $nottalk = !$this->mTitle->isTalkPage();
1527
1528                 if ( $useLinkPrefixExtension ) {
1529                         $m = array();
1530                         if ( preg_match( $e2, $s, $m ) ) {
1531                                 $first_prefix = $m[2];
1532                         } else {
1533                                 $first_prefix = false;
1534                         }
1535                 } else {
1536                         $prefix = '';
1537                 }
1538
1539                 if($wgContLang->hasVariants()) {
1540                         $selflink = $wgContLang->convertLinkToAllVariants($this->mTitle->getPrefixedText());
1541                 } else {
1542                         $selflink = array($this->mTitle->getPrefixedText());
1543                 }
1544                 $useSubpages = $this->areSubpagesAllowed();
1545                 wfProfileOut( $fname.'-setup' );
1546
1547                 # Loop for each link
1548                 for ($k = 0; isset( $a[$k] ); $k++) {
1549                         $line = $a[$k];
1550                         if ( $useLinkPrefixExtension ) {
1551                                 wfProfileIn( $fname.'-prefixhandling' );
1552                                 if ( preg_match( $e2, $s, $m ) ) {
1553                                         $prefix = $m[2];
1554                                         $s = $m[1];
1555                                 } else {
1556                                         $prefix='';
1557                                 }
1558                                 # first link
1559                                 if($first_prefix) {
1560                                         $prefix = $first_prefix;
1561                                         $first_prefix = false;
1562                                 }
1563                                 wfProfileOut( $fname.'-prefixhandling' );
1564                         }
1565
1566                         $might_be_img = false;
1567
1568                         wfProfileIn( "$fname-e1" );
1569                         if ( preg_match( $e1, $line, $m ) ) { # page with normal text or alt
1570                                 $text = $m[2];
1571                                 # If we get a ] at the beginning of $m[3] that means we have a link that's something like:
1572                                 # [[Image:Foo.jpg|[http://example.com desc]]] <- having three ] in a row fucks up,
1573                                 # the real problem is with the $e1 regex
1574                                 # See bug 1300.
1575                                 #
1576                                 # Still some problems for cases where the ] is meant to be outside punctuation,
1577                                 # and no image is in sight. See bug 2095.
1578                                 #
1579                                 if( $text !== '' &&
1580                                         substr( $m[3], 0, 1 ) === ']' &&
1581                                         strpos($text, '[') !== false
1582                                 )
1583                                 {
1584                                         $text .= ']'; # so that replaceExternalLinks($text) works later
1585                                         $m[3] = substr( $m[3], 1 );
1586                                 }
1587                                 # fix up urlencoded title texts
1588                                 if( strpos( $m[1], '%' ) !== false ) {
1589                                         # Should anchors '#' also be rejected?
1590                                         $m[1] = str_replace( array('<', '>'), array('&lt;', '&gt;'), urldecode($m[1]) );
1591                                 }
1592                                 $trail = $m[3];
1593                         } elseif( preg_match($e1_img, $line, $m) ) { # Invalid, but might be an image with a link in its caption
1594                                 $might_be_img = true;
1595                                 $text = $m[2];
1596                                 if ( strpos( $m[1], '%' ) !== false ) {
1597                                         $m[1] = urldecode($m[1]);
1598                                 }
1599                                 $trail = "";
1600                         } else { # Invalid form; output directly
1601                                 $s .= $prefix . '[[' . $line ;
1602                                 wfProfileOut( "$fname-e1" );
1603                                 continue;
1604                         }
1605                         wfProfileOut( "$fname-e1" );
1606                         wfProfileIn( "$fname-misc" );
1607
1608                         # Don't allow internal links to pages containing
1609                         # PROTO: where PROTO is a valid URL protocol; these
1610                         # should be external links.
1611                         if (preg_match('/^\b(?:' . wfUrlProtocols() . ')/', $m[1])) {
1612                                 $s .= $prefix . '[[' . $line ;
1613                                 continue;
1614                         }
1615
1616                         # Make subpage if necessary
1617                         if( $useSubpages ) {
1618                                 $link = $this->maybeDoSubpageLink( $m[1], $text );
1619                         } else {
1620                                 $link = $m[1];
1621                         }
1622
1623                         $noforce = (substr($m[1], 0, 1) != ':');
1624                         if (!$noforce) {
1625                                 # Strip off leading ':'
1626                                 $link = substr($link, 1);
1627                         }
1628
1629                         wfProfileOut( "$fname-misc" );
1630                         wfProfileIn( "$fname-title" );
1631                         $nt = Title::newFromText( $this->mStripState->unstripNoWiki($link) );
1632                         if( !$nt ) {
1633                                 $s .= $prefix . '[[' . $line;
1634                                 wfProfileOut( "$fname-title" );
1635                                 continue;
1636                         }
1637
1638                         $ns = $nt->getNamespace();
1639                         $iw = $nt->getInterWiki();
1640                         wfProfileOut( "$fname-title" );
1641
1642                         if ($might_be_img) { # if this is actually an invalid link
1643                                 wfProfileIn( "$fname-might_be_img" );
1644                                 if ($ns == NS_IMAGE && $noforce) { #but might be an image
1645                                         $found = false;
1646                                         while (isset ($a[$k+1]) ) {
1647                                                 #look at the next 'line' to see if we can close it there
1648                                                 $spliced = array_splice( $a, $k + 1, 1 );
1649                                                 $next_line = array_shift( $spliced );
1650                                                 $m = explode( ']]', $next_line, 3 );
1651                                                 if ( count( $m ) == 3 ) {
1652                                                         # the first ]] closes the inner link, the second the image
1653                                                         $found = true;
1654                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1655                                                         $trail = $m[2];
1656                                                         break;
1657                                                 } elseif ( count( $m ) == 2 ) {
1658                                                         #if there's exactly one ]] that's fine, we'll keep looking
1659                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1660                                                 } else {
1661                                                         #if $next_line is invalid too, we need look no further
1662                                                         $text .= '[[' . $next_line;
1663                                                         break;
1664                                                 }
1665                                         }
1666                                         if ( !$found ) {
1667                                                 # we couldn't find the end of this imageLink, so output it raw
1668                                                 #but don't ignore what might be perfectly normal links in the text we've examined
1669                                                 $text = $this->replaceInternalLinks($text);
1670                                                 $s .= "{$prefix}[[$link|$text";
1671                                                 # note: no $trail, because without an end, there *is* no trail
1672                                                 wfProfileOut( "$fname-might_be_img" );
1673                                                 continue;
1674                                         }
1675                                 } else { #it's not an image, so output it raw
1676                                         $s .= "{$prefix}[[$link|$text";
1677                                         # note: no $trail, because without an end, there *is* no trail
1678                                         wfProfileOut( "$fname-might_be_img" );
1679                                         continue;
1680                                 }
1681                                 wfProfileOut( "$fname-might_be_img" );
1682                         }
1683
1684                         $wasblank = ( '' == $text );
1685                         if( $wasblank ) $text = $link;
1686
1687                         # Link not escaped by : , create the various objects
1688                         if( $noforce ) {
1689
1690                                 # Interwikis
1691                                 wfProfileIn( "$fname-interwiki" );
1692                                 if( $iw && $this->mOptions->getInterwikiMagic() && $nottalk && $wgContLang->getLanguageName( $iw ) ) {
1693                                         $this->mOutput->addLanguageLink( $nt->getFullText() );
1694                                         $s = rtrim($s . $prefix);
1695                                         $s .= trim($trail, "\n") == '' ? '': $prefix . $trail;
1696                                         wfProfileOut( "$fname-interwiki" );
1697                                         continue;
1698                                 }
1699                                 wfProfileOut( "$fname-interwiki" );
1700
1701                                 if ( $ns == NS_IMAGE ) {
1702                                         wfProfileIn( "$fname-image" );
1703                                         if ( !wfIsBadImage( $nt->getDBkey(), $this->mTitle ) ) {
1704                                                 # recursively parse links inside the image caption
1705                                                 # actually, this will parse them in any other parameters, too,
1706                                                 # but it might be hard to fix that, and it doesn't matter ATM
1707                                                 $text = $this->replaceExternalLinks($text);
1708                                                 $text = $this->replaceInternalLinks($text);
1709
1710                                                 # cloak any absolute URLs inside the image markup, so replaceExternalLinks() won't touch them
1711                                                 $s .= $prefix . $this->armorLinks( $this->makeImage( $nt, $text ) ) . $trail;
1712                                                 $this->mOutput->addImage( $nt->getDBkey() );
1713
1714                                                 wfProfileOut( "$fname-image" );
1715                                                 continue;
1716                                         } else {
1717                                                 # We still need to record the image's presence on the page
1718                                                 $this->mOutput->addImage( $nt->getDBkey() );
1719                                         }
1720                                         wfProfileOut( "$fname-image" );
1721
1722                                 }
1723
1724                                 if ( $ns == NS_CATEGORY ) {
1725                                         wfProfileIn( "$fname-category" );
1726                                         $s = rtrim($s . "\n"); # bug 87
1727
1728                                         if ( $wasblank ) {
1729                                                 $sortkey = $this->getDefaultSort();
1730                                         } else {
1731                                                 $sortkey = $text;
1732                                         }
1733                                         $sortkey = Sanitizer::decodeCharReferences( $sortkey );
1734                                         $sortkey = str_replace( "\n", '', $sortkey );
1735                                         $sortkey = $wgContLang->convertCategoryKey( $sortkey );
1736                                         $this->mOutput->addCategory( $nt->getDBkey(), $sortkey );
1737
1738                                         /**
1739                                          * Strip the whitespace Category links produce, see bug 87
1740                                          * @todo We might want to use trim($tmp, "\n") here.
1741                                          */
1742                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1743
1744                                         wfProfileOut( "$fname-category" );
1745                                         continue;
1746                                 }
1747                         }
1748
1749                         # Self-link checking
1750                         if( $nt->getFragment() === '' ) {
1751                                 if( in_array( $nt->getPrefixedText(), $selflink, true ) ) {
1752                                         $s .= $prefix . $sk->makeSelfLinkObj( $nt, $text, '', $trail );
1753                                         continue;
1754                                 }
1755                         }
1756
1757                         # Special and Media are pseudo-namespaces; no pages actually exist in them
1758                         if( $ns == NS_MEDIA ) {
1759                                 $link = $sk->makeMediaLinkObj( $nt, $text );
1760                                 # Cloak with NOPARSE to avoid replacement in replaceExternalLinks
1761                                 $s .= $prefix . $this->armorLinks( $link ) . $trail;
1762                                 $this->mOutput->addImage( $nt->getDBkey() );
1763                                 continue;
1764                         } elseif( $ns == NS_SPECIAL ) {
1765                                 if( SpecialPage::exists( $nt->getDBkey() ) ) {
1766                                         $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1767                                 } else {
1768                                         $s .= $this->makeLinkHolder( $nt, $text, '', $trail, $prefix );
1769                                 }
1770                                 continue;
1771                         } elseif( $ns == NS_IMAGE ) {
1772                                 $img = wfFindFile( $nt );
1773                                 if( $img ) {
1774                                         // Force a blue link if the file exists; may be a remote
1775                                         // upload on the shared repository, and we want to see its
1776                                         // auto-generated page.
1777                                         $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1778                                         $this->mOutput->addLink( $nt );
1779                                         continue;
1780                                 }
1781                         }
1782                         $s .= $this->makeLinkHolder( $nt, $text, '', $trail, $prefix );
1783                 }
1784                 wfProfileOut( $fname );
1785                 return $s;
1786         }
1787
1788         /**
1789          * Make a link placeholder. The text returned can be later resolved to a real link with
1790          * replaceLinkHolders(). This is done for two reasons: firstly to avoid further
1791          * parsing of interwiki links, and secondly to allow all existence checks and
1792          * article length checks (for stub links) to be bundled into a single query.
1793          *
1794          */
1795         function makeLinkHolder( &$nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1796                 wfProfileIn( __METHOD__ );
1797                 if ( ! is_object($nt) ) {
1798                         # Fail gracefully
1799                         $retVal = "<!-- ERROR -->{$prefix}{$text}{$trail}";
1800                 } else {
1801                         # Separate the link trail from the rest of the link
1802                         list( $inside, $trail ) = Linker::splitTrail( $trail );
1803
1804                         if ( $nt->isExternal() ) {
1805                                 $nr = array_push( $this->mInterwikiLinkHolders['texts'], $prefix.$text.$inside );
1806                                 $this->mInterwikiLinkHolders['titles'][] = $nt;
1807                                 $retVal = '<!--IWLINK '. ($nr-1) ."-->{$trail}";
1808                         } else {
1809                                 $nr = array_push( $this->mLinkHolders['namespaces'], $nt->getNamespace() );
1810                                 $this->mLinkHolders['dbkeys'][] = $nt->getDBkey();
1811                                 $this->mLinkHolders['queries'][] = $query;
1812                                 $this->mLinkHolders['texts'][] = $prefix.$text.$inside;
1813                                 $this->mLinkHolders['titles'][] = $nt;
1814
1815                                 $retVal = '<!--LINK '. ($nr-1) ."-->{$trail}";
1816                         }
1817                 }
1818                 wfProfileOut( __METHOD__ );
1819                 return $retVal;
1820         }
1821
1822         /**
1823          * Render a forced-blue link inline; protect against double expansion of
1824          * URLs if we're in a mode that prepends full URL prefixes to internal links.
1825          * Since this little disaster has to split off the trail text to avoid
1826          * breaking URLs in the following text without breaking trails on the
1827          * wiki links, it's been made into a horrible function.
1828          *
1829          * @param Title $nt
1830          * @param string $text
1831          * @param string $query
1832          * @param string $trail
1833          * @param string $prefix
1834          * @return string HTML-wikitext mix oh yuck
1835          */
1836         function makeKnownLinkHolder( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1837                 list( $inside, $trail ) = Linker::splitTrail( $trail );
1838                 $sk = $this->mOptions->getSkin();
1839                 $link = $sk->makeKnownLinkObj( $nt, $text, $query, $inside, $prefix );
1840                 return $this->armorLinks( $link ) . $trail;
1841         }
1842
1843         /**
1844          * Insert a NOPARSE hacky thing into any inline links in a chunk that's
1845          * going to go through further parsing steps before inline URL expansion.
1846          *
1847          * In particular this is important when using action=render, which causes
1848          * full URLs to be included.
1849          *
1850          * Oh man I hate our multi-layer parser!
1851          *
1852          * @param string more-or-less HTML
1853          * @return string less-or-more HTML with NOPARSE bits
1854          */
1855         function armorLinks( $text ) {
1856                 return preg_replace( '/\b(' . wfUrlProtocols() . ')/',
1857                         "{$this->mUniqPrefix}NOPARSE$1", $text );
1858         }
1859
1860         /**
1861          * Return true if subpage links should be expanded on this page.
1862          * @return bool
1863          */
1864         function areSubpagesAllowed() {
1865                 # Some namespaces don't allow subpages
1866                 global $wgNamespacesWithSubpages;
1867                 return !empty($wgNamespacesWithSubpages[$this->mTitle->getNamespace()]);
1868         }
1869
1870         /**
1871          * Handle link to subpage if necessary
1872          * @param string $target the source of the link
1873          * @param string &$text the link text, modified as necessary
1874          * @return string the full name of the link
1875          * @private
1876          */
1877         function maybeDoSubpageLink($target, &$text) {
1878                 # Valid link forms:
1879                 # Foobar -- normal
1880                 # :Foobar -- override special treatment of prefix (images, language links)
1881                 # /Foobar -- convert to CurrentPage/Foobar
1882                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1883                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1884                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1885
1886                 $fname = 'Parser::maybeDoSubpageLink';
1887                 wfProfileIn( $fname );
1888                 $ret = $target; # default return value is no change
1889
1890                 # Some namespaces don't allow subpages,
1891                 # so only perform processing if subpages are allowed
1892                 if( $this->areSubpagesAllowed() ) {
1893                         $hash = strpos( $target, '#' );
1894                         if( $hash !== false ) {
1895                                 $suffix = substr( $target, $hash );
1896                                 $target = substr( $target, 0, $hash );
1897                         } else {
1898                                 $suffix = '';
1899                         }
1900                         # bug 7425
1901                         $target = trim( $target );
1902                         # Look at the first character
1903                         if( $target != '' && $target{0} == '/' ) {
1904                                 # / at end means we don't want the slash to be shown
1905                                 $m = array();
1906                                 $trailingSlashes = preg_match_all( '%(/+)$%', $target, $m );
1907                                 if( $trailingSlashes ) {
1908                                         $noslash = $target = substr( $target, 1, -strlen($m[0][0]) );
1909                                 } else {
1910                                         $noslash = substr( $target, 1 );
1911                                 }
1912
1913                                 $ret = $this->mTitle->getPrefixedText(). '/' . trim($noslash) . $suffix;
1914                                 if( '' === $text ) {
1915                                         $text = $target . $suffix;
1916                                 } # this might be changed for ugliness reasons
1917                         } else {
1918                                 # check for .. subpage backlinks
1919                                 $dotdotcount = 0;
1920                                 $nodotdot = $target;
1921                                 while( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1922                                         ++$dotdotcount;
1923                                         $nodotdot = substr( $nodotdot, 3 );
1924                                 }
1925                                 if($dotdotcount > 0) {
1926                                         $exploded = explode( '/', $this->mTitle->GetPrefixedText() );
1927                                         if( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1928                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1929                                                 # / at the end means don't show full path
1930                                                 if( substr( $nodotdot, -1, 1 ) == '/' ) {
1931                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1932                                                         if( '' === $text ) {
1933                                                                 $text = $nodotdot . $suffix;
1934                                                         }
1935                                                 }
1936                                                 $nodotdot = trim( $nodotdot );
1937                                                 if( $nodotdot != '' ) {
1938                                                         $ret .= '/' . $nodotdot;
1939                                                 }
1940                                                 $ret .= $suffix;
1941                                         }
1942                                 }
1943                         }
1944                 }
1945
1946                 wfProfileOut( $fname );
1947                 return $ret;
1948         }
1949
1950         /**#@+
1951          * Used by doBlockLevels()
1952          * @private
1953          */
1954         /* private */ function closeParagraph() {
1955                 $result = '';
1956                 if ( '' != $this->mLastSection ) {
1957                         $result = '</' . $this->mLastSection  . ">\n";
1958                 }
1959                 $this->mInPre = false;
1960                 $this->mLastSection = '';
1961                 return $result;
1962         }
1963         # getCommon() returns the length of the longest common substring
1964         # of both arguments, starting at the beginning of both.
1965         #
1966         /* private */ function getCommon( $st1, $st2 ) {
1967                 $fl = strlen( $st1 );
1968                 $shorter = strlen( $st2 );
1969                 if ( $fl < $shorter ) { $shorter = $fl; }
1970
1971                 for ( $i = 0; $i < $shorter; ++$i ) {
1972                         if ( $st1{$i} != $st2{$i} ) { break; }
1973                 }
1974                 return $i;
1975         }
1976         # These next three functions open, continue, and close the list
1977         # element appropriate to the prefix character passed into them.
1978         #
1979         /* private */ function openList( $char ) {
1980                 $result = $this->closeParagraph();
1981
1982                 if ( '*' == $char ) { $result .= '<ul><li>'; }
1983                 else if ( '#' == $char ) { $result .= '<ol><li>'; }
1984                 else if ( ':' == $char ) { $result .= '<dl><dd>'; }
1985                 else if ( ';' == $char ) {
1986                         $result .= '<dl><dt>';
1987                         $this->mDTopen = true;
1988                 }
1989                 else { $result = '<!-- ERR 1 -->'; }
1990
1991                 return $result;
1992         }
1993
1994         /* private */ function nextItem( $char ) {
1995                 if ( '*' == $char || '#' == $char ) { return '</li><li>'; }
1996                 else if ( ':' == $char || ';' == $char ) {
1997                         $close = '</dd>';
1998                         if ( $this->mDTopen ) { $close = '</dt>'; }
1999                         if ( ';' == $char ) {
2000                                 $this->mDTopen = true;
2001                                 return $close . '<dt>';
2002                         } else {
2003                                 $this->mDTopen = false;
2004                                 return $close . '<dd>';
2005                         }
2006                 }
2007                 return '<!-- ERR 2 -->';
2008         }
2009
2010         /* private */ function closeList( $char ) {
2011                 if ( '*' == $char ) { $text = '</li></ul>'; }
2012                 else if ( '#' == $char ) { $text = '</li></ol>'; }
2013                 else if ( ':' == $char ) {
2014                         if ( $this->mDTopen ) {
2015                                 $this->mDTopen = false;
2016                                 $text = '</dt></dl>';
2017                         } else {
2018                                 $text = '</dd></dl>';
2019                         }
2020                 }
2021                 else {  return '<!-- ERR 3 -->'; }
2022                 return $text."\n";
2023         }
2024         /**#@-*/
2025
2026         /**
2027          * Make lists from lines starting with ':', '*', '#', etc.
2028          *
2029          * @private
2030          * @return string the lists rendered as HTML
2031          */
2032         function doBlockLevels( $text, $linestart ) {
2033                 $fname = 'Parser::doBlockLevels';
2034                 wfProfileIn( $fname );
2035
2036                 # Parsing through the text line by line.  The main thing
2037                 # happening here is handling of block-level elements p, pre,
2038                 # and making lists from lines starting with * # : etc.
2039                 #
2040                 $textLines = explode( "\n", $text );
2041
2042                 $lastPrefix = $output = '';
2043                 $this->mDTopen = $inBlockElem = false;
2044                 $prefixLength = 0;
2045                 $paragraphStack = false;
2046
2047                 if ( !$linestart ) {
2048                         $output .= array_shift( $textLines );
2049                 }
2050                 foreach ( $textLines as $oLine ) {
2051                         $lastPrefixLength = strlen( $lastPrefix );
2052                         $preCloseMatch = preg_match('/<\\/pre/i', $oLine );
2053                         $preOpenMatch = preg_match('/<pre/i', $oLine );
2054                         if ( !$this->mInPre ) {
2055                                 # Multiple prefixes may abut each other for nested lists.
2056                                 $prefixLength = strspn( $oLine, '*#:;' );
2057                                 $pref = substr( $oLine, 0, $prefixLength );
2058
2059                                 # eh?
2060                                 $pref2 = str_replace( ';', ':', $pref );
2061                                 $t = substr( $oLine, $prefixLength );
2062                                 $this->mInPre = !empty($preOpenMatch);
2063                         } else {
2064                                 # Don't interpret any other prefixes in preformatted text
2065                                 $prefixLength = 0;
2066                                 $pref = $pref2 = '';
2067                                 $t = $oLine;
2068                         }
2069
2070                         # List generation
2071                         if( $prefixLength && 0 == strcmp( $lastPrefix, $pref2 ) ) {
2072                                 # Same as the last item, so no need to deal with nesting or opening stuff
2073                                 $output .= $this->nextItem( substr( $pref, -1 ) );
2074                                 $paragraphStack = false;
2075
2076                                 if ( substr( $pref, -1 ) == ';') {
2077                                         # The one nasty exception: definition lists work like this:
2078                                         # ; title : definition text
2079                                         # So we check for : in the remainder text to split up the
2080                                         # title and definition, without b0rking links.
2081                                         $term = $t2 = '';
2082                                         if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2083                                                 $t = $t2;
2084                                                 $output .= $term . $this->nextItem( ':' );
2085                                         }
2086                                 }
2087                         } elseif( $prefixLength || $lastPrefixLength ) {
2088                                 # Either open or close a level...
2089                                 $commonPrefixLength = $this->getCommon( $pref, $lastPrefix );
2090                                 $paragraphStack = false;
2091
2092                                 while( $commonPrefixLength < $lastPrefixLength ) {
2093                                         $output .= $this->closeList( $lastPrefix{$lastPrefixLength-1} );
2094                                         --$lastPrefixLength;
2095                                 }
2096                                 if ( $prefixLength <= $commonPrefixLength && $commonPrefixLength > 0 ) {
2097                                         $output .= $this->nextItem( $pref{$commonPrefixLength-1} );
2098                                 }
2099                                 while ( $prefixLength > $commonPrefixLength ) {
2100                                         $char = substr( $pref, $commonPrefixLength, 1 );
2101                                         $output .= $this->openList( $char );
2102
2103                                         if ( ';' == $char ) {
2104                                                 # FIXME: This is dupe of code above
2105                                                 if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2106                                                         $t = $t2;
2107                                                         $output .= $term . $this->nextItem( ':' );
2108                                                 }
2109                                         }
2110                                         ++$commonPrefixLength;
2111                                 }
2112                                 $lastPrefix = $pref2;
2113                         }
2114                         if( 0 == $prefixLength ) {
2115                                 wfProfileIn( "$fname-paragraph" );
2116                                 # No prefix (not in list)--go to paragraph mode
2117                                 // XXX: use a stack for nestable elements like span, table and div
2118                                 $openmatch = preg_match('/(?:<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<pre|<tr|<p|<ul|<ol|<li|<\\/tr|<\\/td|<\\/th)/iS', $t );
2119                                 $closematch = preg_match(
2120                                         '/(?:<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6|'.
2121                                         '<td|<th|<\\/?div|<hr|<\\/pre|<\\/p|'.$this->mUniqPrefix.'-pre|<\\/li|<\\/ul|<\\/ol|<\\/?center)/iS', $t );
2122                                 if ( $openmatch or $closematch ) {
2123                                         $paragraphStack = false;
2124                                         # TODO bug 5718: paragraph closed
2125                                         $output .= $this->closeParagraph();
2126                                         if ( $preOpenMatch and !$preCloseMatch ) {
2127                                                 $this->mInPre = true;
2128                                         }
2129                                         if ( $closematch ) {
2130                                                 $inBlockElem = false;
2131                                         } else {
2132                                                 $inBlockElem = true;
2133                                         }
2134                                 } else if ( !$inBlockElem && !$this->mInPre ) {
2135                                         if ( ' ' == $t{0} and ( $this->mLastSection == 'pre' or trim($t) != '' ) ) {
2136                                                 // pre
2137                                                 if ($this->mLastSection != 'pre') {
2138                                                         $paragraphStack = false;
2139                                                         $output .= $this->closeParagraph().'<pre>';
2140                                                         $this->mLastSection = 'pre';
2141                                                 }
2142                                                 $t = substr( $t, 1 );
2143                                         } else {
2144                                                 // paragraph
2145                                                 if ( '' == trim($t) ) {
2146                                                         if ( $paragraphStack ) {
2147                                                                 $output .= $paragraphStack.'<br />';
2148                                                                 $paragraphStack = false;
2149                                                                 $this->mLastSection = 'p';
2150                                                         } else {
2151                                                                 if ($this->mLastSection != 'p' ) {
2152                                                                         $output .= $this->closeParagraph();
2153                                                                         $this->mLastSection = '';
2154                                                                         $paragraphStack = '<p>';
2155                                                                 } else {
2156                                                                         $paragraphStack = '</p><p>';
2157                                                                 }
2158                                                         }
2159                                                 } else {
2160                                                         if ( $paragraphStack ) {
2161                                                                 $output .= $paragraphStack;
2162                                                                 $paragraphStack = false;
2163                                                                 $this->mLastSection = 'p';
2164                                                         } else if ($this->mLastSection != 'p') {
2165                                                                 $output .= $this->closeParagraph().'<p>';
2166                                                                 $this->mLastSection = 'p';
2167                                                         }
2168                                                 }
2169                                         }
2170                                 }
2171                                 wfProfileOut( "$fname-paragraph" );
2172                         }
2173                         // somewhere above we forget to get out of pre block (bug 785)
2174                         if($preCloseMatch && $this->mInPre) {
2175                                 $this->mInPre = false;
2176                         }
2177                         if ($paragraphStack === false) {
2178                                 $output .= $t."\n";
2179                         }
2180                 }
2181                 while ( $prefixLength ) {
2182                         $output .= $this->closeList( $pref2{$prefixLength-1} );
2183                         --$prefixLength;
2184                 }
2185                 if ( '' != $this->mLastSection ) {
2186                         $output .= '</' . $this->mLastSection . '>';
2187                         $this->mLastSection = '';
2188                 }
2189
2190                 wfProfileOut( $fname );
2191                 return $output;
2192         }
2193
2194         /**
2195          * Split up a string on ':', ignoring any occurences inside tags
2196          * to prevent illegal overlapping.
2197          * @param string $str the string to split
2198          * @param string &$before set to everything before the ':'
2199          * @param string &$after set to everything after the ':'
2200          * return string the position of the ':', or false if none found
2201          */
2202         function findColonNoLinks($str, &$before, &$after) {
2203                 $fname = 'Parser::findColonNoLinks';
2204                 wfProfileIn( $fname );
2205
2206                 $pos = strpos( $str, ':' );
2207                 if( $pos === false ) {
2208                         // Nothing to find!
2209                         wfProfileOut( $fname );
2210                         return false;
2211                 }
2212
2213                 $lt = strpos( $str, '<' );
2214                 if( $lt === false || $lt > $pos ) {
2215                         // Easy; no tag nesting to worry about
2216                         $before = substr( $str, 0, $pos );
2217                         $after = substr( $str, $pos+1 );
2218                         wfProfileOut( $fname );
2219                         return $pos;
2220                 }
2221
2222                 // Ugly state machine to walk through avoiding tags.
2223                 $state = self::COLON_STATE_TEXT;
2224                 $stack = 0;
2225                 $len = strlen( $str );
2226                 for( $i = 0; $i < $len; $i++ ) {
2227                         $c = $str{$i};
2228
2229                         switch( $state ) {
2230                         // (Using the number is a performance hack for common cases)
2231                         case 0: // self::COLON_STATE_TEXT:
2232                                 switch( $c ) {
2233                                 case "<":
2234                                         // Could be either a <start> tag or an </end> tag
2235                                         $state = self::COLON_STATE_TAGSTART;
2236                                         break;
2237                                 case ":":
2238                                         if( $stack == 0 ) {
2239                                                 // We found it!
2240                                                 $before = substr( $str, 0, $i );
2241                                                 $after = substr( $str, $i + 1 );
2242                                                 wfProfileOut( $fname );
2243                                                 return $i;
2244                                         }
2245                                         // Embedded in a tag; don't break it.
2246                                         break;
2247                                 default:
2248                                         // Skip ahead looking for something interesting
2249                                         $colon = strpos( $str, ':', $i );
2250                                         if( $colon === false ) {
2251                                                 // Nothing else interesting
2252                                                 wfProfileOut( $fname );
2253                                                 return false;
2254                                         }
2255                                         $lt = strpos( $str, '<', $i );
2256                                         if( $stack === 0 ) {
2257                                                 if( $lt === false || $colon < $lt ) {
2258                                                         // We found it!
2259                                                         $before = substr( $str, 0, $colon );
2260                                                         $after = substr( $str, $colon + 1 );
2261                                                         wfProfileOut( $fname );
2262                                                         return $i;
2263                                                 }
2264                                         }
2265                                         if( $lt === false ) {
2266                                                 // Nothing else interesting to find; abort!
2267                                                 // We're nested, but there's no close tags left. Abort!
2268                                                 break 2;
2269                                         }
2270                                         // Skip ahead to next tag start
2271                                         $i = $lt;
2272                                         $state = self::COLON_STATE_TAGSTART;
2273                                 }
2274                                 break;
2275                         case 1: // self::COLON_STATE_TAG:
2276                                 // In a <tag>
2277                                 switch( $c ) {
2278                                 case ">":
2279                                         $stack++;
2280                                         $state = self::COLON_STATE_TEXT;
2281                                         break;
2282                                 case "/":
2283                                         // Slash may be followed by >?
2284                                         $state = self::COLON_STATE_TAGSLASH;
2285                                         break;
2286                                 default:
2287                                         // ignore
2288                                 }
2289                                 break;
2290                         case 2: // self::COLON_STATE_TAGSTART:
2291                                 switch( $c ) {
2292                                 case "/":
2293                                         $state = self::COLON_STATE_CLOSETAG;
2294                                         break;
2295                                 case "!":
2296                                         $state = self::COLON_STATE_COMMENT;
2297                                         break;
2298                                 case ">":
2299                                         // Illegal early close? This shouldn't happen D:
2300                                         $state = self::COLON_STATE_TEXT;
2301                                         break;
2302                                 default:
2303                                         $state = self::COLON_STATE_TAG;
2304                                 }
2305                                 break;
2306                         case 3: // self::COLON_STATE_CLOSETAG:
2307                                 // In a </tag>
2308                                 if( $c == ">" ) {
2309                                         $stack--;
2310                                         if( $stack < 0 ) {
2311                                                 wfDebug( "Invalid input in $fname; too many close tags\n" );
2312                                                 wfProfileOut( $fname );
2313                                                 return false;
2314                                         }
2315                                         $state = self::COLON_STATE_TEXT;
2316                                 }
2317                                 break;
2318                         case self::COLON_STATE_TAGSLASH:
2319                                 if( $c == ">" ) {
2320                                         // Yes, a self-closed tag <blah/>
2321                                         $state = self::COLON_STATE_TEXT;
2322                                 } else {
2323                                         // Probably we're jumping the gun, and this is an attribute
2324                                         $state = self::COLON_STATE_TAG;
2325                                 }
2326                                 break;
2327                         case 5: // self::COLON_STATE_COMMENT:
2328                                 if( $c == "-" ) {
2329                                         $state = self::COLON_STATE_COMMENTDASH;
2330                                 }
2331                                 break;
2332                         case self::COLON_STATE_COMMENTDASH:
2333                                 if( $c == "-" ) {
2334                                         $state = self::COLON_STATE_COMMENTDASHDASH;
2335                                 } else {
2336                                         $state = self::COLON_STATE_COMMENT;
2337                                 }
2338                                 break;
2339                         case self::COLON_STATE_COMMENTDASHDASH:
2340                                 if( $c == ">" ) {
2341                                         $state = self::COLON_STATE_TEXT;
2342                                 } else {
2343                                         $state = self::COLON_STATE_COMMENT;
2344                                 }
2345                                 break;
2346                         default:
2347                                 throw new MWException( "State machine error in $fname" );
2348                         }
2349                 }
2350                 if( $stack > 0 ) {
2351                         wfDebug( "Invalid input in $fname; not enough close tags (stack $stack, state $state)\n" );
2352                         return false;
2353                 }
2354                 wfProfileOut( $fname );
2355                 return false;
2356         }
2357
2358         /**
2359          * Return value of a magic variable (like PAGENAME)
2360          *
2361          * @private
2362          */
2363         function getVariableValue( $index ) {
2364                 global $wgContLang, $wgSitename, $wgServer, $wgServerName, $wgScriptPath;
2365
2366                 /**
2367                  * Some of these require message or data lookups and can be
2368                  * expensive to check many times.
2369                  */
2370                 static $varCache = array();
2371                 if ( wfRunHooks( 'ParserGetVariableValueVarCache', array( &$this, &$varCache ) ) ) {
2372                         if ( isset( $varCache[$index] ) ) {
2373                                 return $varCache[$index];
2374                         }
2375                 }
2376
2377                 $ts = time();
2378                 wfRunHooks( 'ParserGetVariableValueTs', array( &$this, &$ts ) );
2379
2380                 # Use the time zone
2381                 global $wgLocaltimezone;
2382                 if ( isset( $wgLocaltimezone ) ) {
2383                         $oldtz = getenv( 'TZ' );
2384                         putenv( 'TZ='.$wgLocaltimezone );
2385                 }
2386
2387                 wfSuppressWarnings(); // E_STRICT system time bitching
2388                 $localTimestamp = date( 'YmdHis', $ts );
2389                 $localMonth = date( 'm', $ts );
2390                 $localMonthName = date( 'n', $ts );
2391                 $localDay = date( 'j', $ts );
2392                 $localDay2 = date( 'd', $ts );
2393                 $localDayOfWeek = date( 'w', $ts );
2394                 $localWeek = date( 'W', $ts );
2395                 $localYear = date( 'Y', $ts );
2396                 $localHour = date( 'H', $ts );
2397                 if ( isset( $wgLocaltimezone ) ) {
2398                         putenv( 'TZ='.$oldtz );
2399                 }
2400                 wfRestoreWarnings();
2401
2402                 switch ( $index ) {
2403                         case 'currentmonth':
2404                                 return $varCache[$index] = $wgContLang->formatNum( gmdate( 'm', $ts ) );
2405                         case 'currentmonthname':
2406                                 return $varCache[$index] = $wgContLang->getMonthName( gmdate( 'n', $ts ) );
2407                         case 'currentmonthnamegen':
2408                                 return $varCache[$index] = $wgContLang->getMonthNameGen( gmdate( 'n', $ts ) );
2409                         case 'currentmonthabbrev':
2410                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( gmdate( 'n', $ts ) );
2411                         case 'currentday':
2412                                 return $varCache[$index] = $wgContLang->formatNum( gmdate( 'j', $ts ) );
2413                         case 'currentday2':
2414                                 return $varCache[$index] = $wgContLang->formatNum( gmdate( 'd', $ts ) );
2415                         case 'localmonth':
2416                                 return $varCache[$index] = $wgContLang->formatNum( $localMonth );
2417                         case 'localmonthname':
2418                                 return $varCache[$index] = $wgContLang->getMonthName( $localMonthName );
2419                         case 'localmonthnamegen':
2420                                 return $varCache[$index] = $wgContLang->getMonthNameGen( $localMonthName );
2421                         case 'localmonthabbrev':
2422                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( $localMonthName );
2423                         case 'localday':
2424                                 return $varCache[$index] = $wgContLang->formatNum( $localDay );
2425                         case 'localday2':
2426                                 return $varCache[$index] = $wgContLang->formatNum( $localDay2 );
2427                         case 'pagename':
2428                                 return wfEscapeWikiText( $this->mTitle->getText() );
2429                         case 'pagenamee':
2430                                 return $this->mTitle->getPartialURL();
2431                         case 'fullpagename':
2432                                 return wfEscapeWikiText( $this->mTitle->getPrefixedText() );
2433                         case 'fullpagenamee':
2434                                 return $this->mTitle->getPrefixedURL();
2435                         case 'subpagename':
2436                                 return wfEscapeWikiText( $this->mTitle->getSubpageText() );
2437                         case 'subpagenamee':
2438                                 return $this->mTitle->getSubpageUrlForm();
2439                         case 'basepagename':
2440                                 return wfEscapeWikiText( $this->mTitle->getBaseText() );
2441                         case 'basepagenamee':
2442                                 return wfUrlEncode( str_replace( ' ', '_', $this->mTitle->getBaseText() ) );
2443                         case 'talkpagename':
2444                                 if( $this->mTitle->canTalk() ) {
2445                                         $talkPage = $this->mTitle->getTalkPage();
2446                                         return wfEscapeWikiText( $talkPage->getPrefixedText() );
2447                                 } else {
2448                                         return '';
2449                                 }
2450                         case 'talkpagenamee':
2451                                 if( $this->mTitle->canTalk() ) {
2452                                         $talkPage = $this->mTitle->getTalkPage();
2453                                         return $talkPage->getPrefixedUrl();
2454                                 } else {
2455                                         return '';
2456                                 }
2457                         case 'subjectpagename':
2458                                 $subjPage = $this->mTitle->getSubjectPage();
2459                                 return wfEscapeWikiText( $subjPage->getPrefixedText() );
2460                         case 'subjectpagenamee':
2461                                 $subjPage = $this->mTitle->getSubjectPage();
2462                                 return $subjPage->getPrefixedUrl();
2463                         case 'revisionid':
2464                                 // Let the edit saving system know we should parse the page
2465                                 // *after* a revision ID has been assigned.
2466                                 $this->mOutput->setFlag( 'vary-revision' );
2467                                 wfDebug( __METHOD__ . ": {{REVISIONID}} used, setting vary-revision...\n" );
2468                                 return $this->mRevisionId;
2469                         case 'revisionday':
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__ . ": {{REVISIONDAY}} used, setting vary-revision...\n" );
2474                                 return intval( substr( $this->getRevisionTimestamp(), 6, 2 ) );
2475                         case 'revisionday2':
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__ . ": {{REVISIONDAY2}} used, setting vary-revision...\n" );
2480                                 return substr( $this->getRevisionTimestamp(), 6, 2 );
2481                         case 'revisionmonth':
2482                                 // Let the edit saving system know we should parse the page
2483                                 // *after* a revision ID has been assigned. This is for null edits.
2484                                 $this->mOutput->setFlag( 'vary-revision' );
2485                                 wfDebug( __METHOD__ . ": {{REVISIONMONTH}} used, setting vary-revision...\n" );
2486                                 return intval( substr( $this->getRevisionTimestamp(), 4, 2 ) );
2487                         case 'revisionyear':
2488                                 // Let the edit saving system know we should parse the page
2489                                 // *after* a revision ID has been assigned. This is for null edits.
2490                                 $this->mOutput->setFlag( 'vary-revision' );
2491                                 wfDebug( __METHOD__ . ": {{REVISIONYEAR}} used, setting vary-revision...\n" );
2492                                 return substr( $this->getRevisionTimestamp(), 0, 4 );
2493                         case 'revisiontimestamp':
2494                                 // Let the edit saving system know we should parse the page
2495                                 // *after* a revision ID has been assigned. This is for null edits.
2496                                 $this->mOutput->setFlag( 'vary-revision' );
2497                                 wfDebug( __METHOD__ . ": {{REVISIONTIMESTAMP}} used, setting vary-revision...\n" );
2498                                 return $this->getRevisionTimestamp();
2499                         case 'namespace':
2500                                 return str_replace('_',' ',$wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2501                         case 'namespacee':
2502                                 return wfUrlencode( $wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2503                         case 'talkspace':
2504                                 return $this->mTitle->canTalk() ? str_replace('_',' ',$this->mTitle->getTalkNsText()) : '';
2505                         case 'talkspacee':
2506                                 return $this->mTitle->canTalk() ? wfUrlencode( $this->mTitle->getTalkNsText() ) : '';
2507                         case 'subjectspace':
2508                                 return $this->mTitle->getSubjectNsText();
2509                         case 'subjectspacee':
2510                                 return( wfUrlencode( $this->mTitle->getSubjectNsText() ) );
2511                         case 'currentdayname':
2512                                 return $varCache[$index] = $wgContLang->getWeekdayName( gmdate( 'w', $ts ) + 1 );
2513                         case 'currentyear':
2514                                 return $varCache[$index] = $wgContLang->formatNum( gmdate( 'Y', $ts ), true );
2515                         case 'currenttime':
2516                                 return $varCache[$index] = $wgContLang->time( wfTimestamp( TS_MW, $ts ), false, false );
2517                         case 'currenthour':
2518                                 return $varCache[$index] = $wgContLang->formatNum( gmdate( 'H', $ts ), true );
2519                         case 'currentweek':
2520                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2521                                 // int to remove the padding
2522                                 return $varCache[$index] = $wgContLang->formatNum( (int)gmdate( 'W', $ts ) );
2523                         case 'currentdow':
2524                                 return $varCache[$index] = $wgContLang->formatNum( gmdate( 'w', $ts ) );
2525                         case 'localdayname':
2526                                 return $varCache[$index] = $wgContLang->getWeekdayName( $localDayOfWeek + 1 );
2527                         case 'localyear':
2528                                 return $varCache[$index] = $wgContLang->formatNum( $localYear, true );
2529                         case 'localtime':
2530                                 return $varCache[$index] = $wgContLang->time( $localTimestamp, false, false );
2531                         case 'localhour':
2532                                 return $varCache[$index] = $wgContLang->formatNum( $localHour, true );
2533                         case 'localweek':
2534                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2535                                 // int to remove the padding
2536                                 return $varCache[$index] = $wgContLang->formatNum( (int)$localWeek );
2537                         case 'localdow':
2538                                 return $varCache[$index] = $wgContLang->formatNum( $localDayOfWeek );
2539                         case 'numberofarticles':
2540                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::articles() );
2541                         case 'numberoffiles':
2542                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::images() );
2543                         case 'numberofusers':
2544                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::users() );
2545                         case 'numberofpages':
2546                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::pages() );
2547                         case 'numberofadmins':
2548                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::admins() );
2549                         case 'numberofedits':
2550                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::edits() );
2551                         case 'currenttimestamp':
2552                                 return $varCache[$index] = wfTimestampNow();
2553                         case 'localtimestamp':
2554                                 return $varCache[$index] = $localTimestamp;
2555                         case 'currentversion':
2556                                 return $varCache[$index] = SpecialVersion::getVersion();
2557                         case 'sitename':
2558                                 return $wgSitename;
2559                         case 'server':
2560                                 return $wgServer;
2561                         case 'servername':
2562                                 return $wgServerName;
2563                         case 'scriptpath':
2564                                 return $wgScriptPath;
2565                         case 'directionmark':
2566                                 return $wgContLang->getDirMark();
2567                         case 'contentlanguage':
2568                                 global $wgContLanguageCode;
2569                                 return $wgContLanguageCode;
2570                         default:
2571                                 $ret = null;
2572                                 if ( wfRunHooks( 'ParserGetVariableValueSwitch', array( &$this, &$varCache, &$index, &$ret ) ) )
2573                                         return $ret;
2574                                 else
2575                                         return null;
2576                 }
2577         }
2578
2579         /**
2580          * initialise the magic variables (like CURRENTMONTHNAME)
2581          *
2582          * @private
2583          */
2584         function initialiseVariables() {
2585                 $fname = 'Parser::initialiseVariables';
2586                 wfProfileIn( $fname );
2587                 $variableIDs = MagicWord::getVariableIDs();
2588
2589                 $this->mVariables = new MagicWordArray( $variableIDs );
2590                 wfProfileOut( $fname );
2591         }
2592
2593         /**
2594          * Preprocess some wikitext and return the document tree.
2595          * This is the ghost of replace_variables().
2596          *
2597          * @param string $text The text to parse
2598          * @param integer flags Bitwise combination of:
2599          *          self::PTD_FOR_INCLUSION    Handle <noinclude>/<includeonly> as if the text is being
2600          *                                     included. Default is to assume a direct page view.
2601          *
2602          * The generated DOM tree must depend only on the input text and the flags.
2603          * The DOM tree must be the same in OT_HTML and OT_WIKI mode, to avoid a regression of bug 4899.
2604          *
2605          * Any flag added to the $flags parameter here, or any other parameter liable to cause a
2606          * change in the DOM tree for a given text, must be passed through the section identifier
2607          * in the section edit link and thus back to extractSections().
2608          *
2609          * The output of this function is currently only cached in process memory, but a persistent
2610          * cache may be implemented at a later date which takes further advantage of these strict
2611          * dependency requirements.
2612          *
2613          * @private
2614          */
2615         function preprocessToDom ( $text, $flags = 0 ) {
2616                 $dom = $this->getPreprocessor()->preprocessToObj( $text, $flags );
2617                 return $dom;
2618         }
2619
2620         /*
2621          * Return a three-element array: leading whitespace, string contents, trailing whitespace
2622          */
2623         public static function splitWhitespace( $s ) {
2624                 $ltrimmed = ltrim( $s );
2625                 $w1 = substr( $s, 0, strlen( $s ) - strlen( $ltrimmed ) );
2626                 $trimmed = rtrim( $ltrimmed );
2627                 $diff = strlen( $ltrimmed ) - strlen( $trimmed );
2628                 if ( $diff > 0 ) {
2629                         $w2 = substr( $ltrimmed, -$diff );
2630                 } else {
2631                         $w2 = '';
2632                 }
2633                 return array( $w1, $trimmed, $w2 );
2634         }
2635
2636         /**
2637          * Replace magic variables, templates, and template arguments
2638          * with the appropriate text. Templates are substituted recursively,
2639          * taking care to avoid infinite loops.
2640          *
2641          * Note that the substitution depends on value of $mOutputType:
2642          *  OT_WIKI: only {{subst:}} templates
2643          *  OT_PREPROCESS: templates but not extension tags
2644          *  OT_HTML: all templates and extension tags
2645          *
2646          * @param string $tex The text to transform
2647          * @param PPFrame $frame Object describing the arguments passed to the template
2648          * @param bool $argsOnly Only do argument (triple-brace) expansion, not double-brace expansion
2649          * @private
2650          */
2651         function replaceVariables( $text, $frame = false, $argsOnly = false ) {
2652                 # Prevent too big inclusions
2653                 if( strlen( $text ) > $this->mOptions->getMaxIncludeSize() ) {
2654                         return $text;
2655                 }
2656
2657                 $fname = __METHOD__;
2658                 wfProfileIn( $fname );
2659
2660                 if ( $frame === false ) {
2661                         $frame = $this->getPreprocessor()->newFrame();
2662                 } elseif ( !( $frame instanceof PPFrame ) ) {
2663                         throw new MWException( __METHOD__ . ' called using the old argument format' );
2664                 }
2665
2666                 $dom = $this->preprocessToDom( $text );
2667                 $flags = $argsOnly ? PPFrame::NO_TEMPLATES : 0;
2668                 $text = $frame->expand( $dom, $flags );
2669
2670                 wfProfileOut( $fname );
2671                 return $text;
2672         }
2673
2674         /// Clean up argument array - refactored in 1.9 so parserfunctions can use it, too.
2675         static function createAssocArgs( $args ) {
2676                 $assocArgs = array();
2677                 $index = 1;
2678                 foreach( $args as $arg ) {
2679                         $eqpos = strpos( $arg, '=' );
2680                         if ( $eqpos === false ) {
2681                                 $assocArgs[$index++] = $arg;
2682                         } else {
2683                                 $name = trim( substr( $arg, 0, $eqpos ) );
2684                                 $value = trim( substr( $arg, $eqpos+1 ) );
2685                                 if ( $value === false ) {
2686                                         $value = '';
2687                                 }
2688                                 if ( $name !== false ) {
2689                                         $assocArgs[$name] = $value;
2690                                 }
2691                         }
2692                 }
2693
2694                 return $assocArgs;
2695         }
2696
2697         /**
2698          * Return the text of a template, after recursively
2699          * replacing any variables or templates within the template.
2700          *
2701          * @param array $piece The parts of the template
2702          *  $piece['title']: the title, i.e. the part before the |
2703          *  $piece['parts']: the parameter array
2704          *  $piece['lineStart']: whether the brace was at the start of a line
2705          * @param PPFrame The current frame, contains template arguments
2706          * @return string the text of the template
2707          * @private
2708          */
2709         function braceSubstitution( $piece, $frame ) {
2710                 global $wgContLang, $wgLang, $wgAllowDisplayTitle, $wgNonincludableNamespaces;
2711                 $fname = __METHOD__;
2712                 wfProfileIn( $fname );
2713                 wfProfileIn( __METHOD__.'-setup' );
2714
2715                 # Flags
2716                 $found = false;             # $text has been filled
2717                 $nowiki = false;            # wiki markup in $text should be escaped
2718                 $isHTML = false;            # $text is HTML, armour it against wikitext transformation
2719                 $forceRawInterwiki = false; # Force interwiki transclusion to be done in raw mode not rendered
2720                 $isChildObj = false;        # $text is a DOM node needing expansion in a child frame
2721                 $isLocalObj = false;        # $text is a DOM node needing expansion in the current frame
2722
2723                 # Title object, where $text came from
2724                 $title = NULL;
2725
2726                 # $part1 is the bit before the first |, and must contain only title characters.
2727                 # Various prefixes will be stripped from it later.
2728                 $titleWithSpaces = $frame->expand( $piece['title'] );
2729                 $part1 = trim( $titleWithSpaces );
2730                 $titleText = false;
2731
2732                 # Original title text preserved for various purposes
2733                 $originalTitle = $part1;
2734
2735                 # $args is a list of argument nodes, starting from index 0, not including $part1
2736                 $args = (null == $piece['parts']) ? array() : $piece['parts'];
2737                 wfProfileOut( __METHOD__.'-setup' );
2738
2739                 # SUBST
2740                 wfProfileIn( __METHOD__.'-modifiers' );
2741                 if ( !$found ) {
2742                         $mwSubst =& MagicWord::get( 'subst' );
2743                         if ( $mwSubst->matchStartAndRemove( $part1 ) xor $this->ot['wiki'] ) {
2744                                 # One of two possibilities is true:
2745                                 # 1) Found SUBST but not in the PST phase
2746                                 # 2) Didn't find SUBST and in the PST phase
2747                                 # In either case, return without further processing
2748                                 $text = $frame->virtualBracketedImplode( '{{', '|', '}}', $titleWithSpaces, $args );
2749                                 $isLocalObj = true;
2750                                 $found = true;
2751                         }
2752                 }
2753
2754                 # Variables
2755                 if ( !$found && $args->getLength() == 0 ) {
2756                         $id = $this->mVariables->matchStartToEnd( $part1 );
2757                         if ( $id !== false ) {
2758                                 $text = $this->getVariableValue( $id );
2759                                 if (MagicWord::getCacheTTL($id)>-1)
2760                                         $this->mOutput->mContainsOldMagic = true;
2761                                 $found = true;
2762                         }
2763                 }
2764
2765                 # MSG, MSGNW and RAW
2766                 if ( !$found ) {
2767                         # Check for MSGNW:
2768                         $mwMsgnw =& MagicWord::get( 'msgnw' );
2769                         if ( $mwMsgnw->matchStartAndRemove( $part1 ) ) {
2770                                 $nowiki = true;
2771                         } else {
2772                                 # Remove obsolete MSG:
2773                                 $mwMsg =& MagicWord::get( 'msg' );
2774                                 $mwMsg->matchStartAndRemove( $part1 );
2775                         }
2776
2777                         # Check for RAW:
2778                         $mwRaw =& MagicWord::get( 'raw' );
2779                         if ( $mwRaw->matchStartAndRemove( $part1 ) ) {
2780                                 $forceRawInterwiki = true;
2781                         }
2782                 }
2783                 wfProfileOut( __METHOD__.'-modifiers' );
2784
2785                 # Parser functions
2786                 if ( !$found ) {
2787                         wfProfileIn( __METHOD__ . '-pfunc' );
2788
2789                         $colonPos = strpos( $part1, ':' );
2790                         if ( $colonPos !== false ) {
2791                                 # Case sensitive functions
2792                                 $function = substr( $part1, 0, $colonPos );
2793                                 if ( isset( $this->mFunctionSynonyms[1][$function] ) ) {
2794                                         $function = $this->mFunctionSynonyms[1][$function];
2795                                 } else {
2796                                         # Case insensitive functions
2797                                         $function = strtolower( $function );
2798                                         if ( isset( $this->mFunctionSynonyms[0][$function] ) ) {
2799                                                 $function = $this->mFunctionSynonyms[0][$function];
2800                                         } else {
2801                                                 $function = false;
2802                                         }
2803                                 }
2804                                 if ( $function ) {
2805                                         list( $callback, $flags ) = $this->mFunctionHooks[$function];
2806                                         $initialArgs = array( &$this );
2807                                         $funcArgs = array( trim( substr( $part1, $colonPos + 1 ) ) );
2808                                         if ( $flags & SFH_OBJECT_ARGS ) {
2809                                                 # Add a frame parameter, and pass the arguments as an array
2810                                                 $allArgs = $initialArgs;
2811                                                 $allArgs[] = $frame;
2812                                                 for ( $i = 0; $i < $args->getLength(); $i++ ) {
2813                                                         $funcArgs[] = $args->item( $i );
2814                                                 }
2815                                                 $allArgs[] = $funcArgs;
2816                                         } else {
2817                                                 # Convert arguments to plain text
2818                                                 for ( $i = 0; $i < $args->getLength(); $i++ ) {
2819                                                         $funcArgs[] = trim( $frame->expand( $args->item( $i ) ) );
2820                                                 }
2821                                                 $allArgs = array_merge( $initialArgs, $funcArgs );
2822                                         }
2823
2824                                         $result = call_user_func_array( $callback, $allArgs );
2825                                         $found = true;
2826
2827                                         if ( is_array( $result ) ) {
2828                                                 if ( isset( $result[0] ) ) {
2829                                                         $text = $result[0];
2830                                                         unset( $result[0] );
2831                                                 }
2832
2833                                                 // Extract flags into the local scope
2834                                                 // This allows callers to set flags such as nowiki, found, etc.
2835                                                 extract( $result );
2836                                         } else {
2837                                                 $text = $result;
2838                                         }
2839                                 }
2840                         }
2841                         wfProfileOut( __METHOD__ . '-pfunc' );
2842                 }
2843
2844                 # Finish mangling title and then check for loops.
2845                 # Set $title to a Title object and $titleText to the PDBK
2846                 if ( !$found ) {
2847                         $ns = NS_TEMPLATE;
2848                         # Split the title into page and subpage
2849                         $subpage = '';
2850                         $part1 = $this->maybeDoSubpageLink( $part1, $subpage );
2851                         if ($subpage !== '') {
2852                                 $ns = $this->mTitle->getNamespace();
2853                         }
2854                         $title = Title::newFromText( $part1, $ns );
2855                         if ( $title ) {
2856                                 $titleText = $title->getPrefixedText();
2857                                 # Check for language variants if the template is not found
2858                                 if($wgContLang->hasVariants() && $title->getArticleID() == 0){
2859                                         $wgContLang->findVariantLink($part1, $title);
2860                                 }
2861                                 # Do infinite loop check
2862                                 if ( !$frame->loopCheck( $title ) ) {
2863                                         $found = true;
2864                                         $text = "<span class=\"error\">Template loop detected: [[$titleText]]</span>";
2865                                         wfDebug( __METHOD__.": template loop broken at '$titleText'\n" );
2866                                 }
2867                                 # Do recursion depth check
2868                                 $limit = $this->mOptions->getMaxTemplateDepth();
2869                                 if ( $frame->depth >= $limit ) {
2870                                         $found = true;
2871                                         $text = "<span class=\"error\">Template recursion depth limit exceeded ($limit)</span>";
2872                                 }
2873                         }
2874                 }
2875
2876                 # Load from database
2877                 if ( !$found && $title ) {
2878                         wfProfileIn( __METHOD__ . '-loadtpl' );
2879                         if ( !$title->isExternal() ) {
2880                                 if ( $title->getNamespace() == NS_SPECIAL && $this->mOptions->getAllowSpecialInclusion() && $this->ot['html'] ) {
2881                                         $text = SpecialPage::capturePath( $title );
2882                                         if ( is_string( $text ) ) {
2883                                                 $found = true;
2884                                                 $isHTML = true;
2885                                                 $this->disableCache();
2886                                         }
2887                                 } else if ( $wgNonincludableNamespaces && in_array( $title->getNamespace(), $wgNonincludableNamespaces ) ) {
2888                                         $found = false; //access denied
2889                                         wfDebug( "$fname: template inclusion denied for " . $title->getPrefixedDBkey() );
2890                                 } else {
2891                                         list( $text, $title ) = $this->getTemplateDom( $title );
2892                                         if ( $text !== false ) {
2893                                                 $found = true;
2894                                                 $isChildObj = true;
2895                                         }
2896                                 }
2897
2898                                 # If the title is valid but undisplayable, make a link to it
2899                                 if ( !$found && ( $this->ot['html'] || $this->ot['pre'] ) ) {
2900                                         $text = "[[:$titleText]]";
2901                                         $found = true;
2902                                 }
2903                         } elseif ( $title->isTrans() ) {
2904                                 // Interwiki transclusion
2905                                 if ( $this->ot['html'] && !$forceRawInterwiki ) {
2906                                         $text = $this->interwikiTransclude( $title, 'render' );
2907                                         $isHTML = true;
2908                                 } else {
2909                                         $text = $this->interwikiTransclude( $title, 'raw' );
2910                                         // Preprocess it like a template
2911                                         $text = $this->preprocessToDom( $text, self::PTD_FOR_INCLUSION );
2912                                         $isChildObj = true;
2913                                 }
2914                                 $found = true;
2915                         }
2916                         wfProfileOut( __METHOD__ . '-loadtpl' );
2917                 }
2918
2919                 # If we haven't found text to substitute by now, we're done
2920                 # Recover the source wikitext and return it
2921                 if ( !$found ) {
2922                         $text = $frame->virtualBracketedImplode( '{{', '|', '}}', $titleWithSpaces, $args );
2923                         wfProfileOut( $fname );
2924                         return array( 'object' => $text );
2925                 }
2926
2927                 # Expand DOM-style return values in a child frame
2928                 if ( $isChildObj ) {
2929                         # Clean up argument array
2930                         $newFrame = $frame->newChild( $args, $title );
2931
2932                         if ( $titleText !== false && $newFrame->isEmpty() ) {
2933                                 # Expansion is eligible for the empty-frame cache
2934                                 if ( isset( $this->mTplExpandCache[$titleText] ) ) {
2935                                         $text = $this->mTplExpandCache[$titleText];
2936                                 } else {
2937                                         $text = $newFrame->expand( $text );
2938                                         $this->mTplExpandCache[$titleText] = $text;
2939                                 }
2940                         } else {
2941                                 # Uncached expansion
2942                                 $text = $newFrame->expand( $text );
2943                         }
2944                 }
2945
2946                 # Replace raw HTML by a placeholder
2947                 # Add a blank line preceding, to prevent it from mucking up
2948                 # immediately preceding headings
2949                 if ( $isHTML ) {
2950                         $text = "\n\n" . $this->insertStripItem( $text );
2951                 }
2952                 # Escape nowiki-style return values
2953                 elseif ( $nowiki && ( $this->ot['html'] || $this->ot['pre'] ) ) {
2954                         $text = wfEscapeWikiText( $text );
2955                 }
2956                 # Bug 529: if the template begins with a table or block-level
2957                 # element, it should be treated as beginning a new line.
2958                 # This behaviour is somewhat controversial.
2959                 elseif ( is_string( $text ) && !$piece['lineStart'] && preg_match('/^(?:{\\||:|;|#|\*)/', $text)) /*}*/{
2960                         $text = "\n" . $text;
2961                 }
2962
2963                 if ( is_string( $text ) && !$this->incrementIncludeSize( 'post-expand', strlen( $text ) ) ) {
2964                         # Error, oversize inclusion
2965                         $text = "[[$originalTitle]]" .
2966                                 $this->insertStripItem( '<!-- WARNING: template omitted, post-expand include size too large -->' );
2967                 }
2968
2969                 if ( $isLocalObj ) {
2970                         $ret = array( 'object' => $text );
2971                 } else {
2972                         $ret = array( 'text' => $text );
2973                 }
2974
2975                 wfProfileOut( $fname );
2976                 return $ret;
2977         }
2978
2979         /**
2980          * Get the semi-parsed DOM representation of a template with a given title,
2981          * and its redirect destination title. Cached.
2982          */
2983         function getTemplateDom( $title ) {
2984                 $cacheTitle = $title;
2985                 $titleText = $title->getPrefixedDBkey();
2986
2987                 if ( isset( $this->mTplRedirCache[$titleText] ) ) {
2988                         list( $ns, $dbk ) = $this->mTplRedirCache[$titleText];
2989                         $title = Title::makeTitle( $ns, $dbk );
2990                         $titleText = $title->getPrefixedDBkey();
2991                 }
2992                 if ( isset( $this->mTplDomCache[$titleText] ) ) {
2993                         return array( $this->mTplDomCache[$titleText], $title );
2994                 }
2995
2996                 // Cache miss, go to the database
2997                 list( $text, $title ) = $this->fetchTemplateAndTitle( $title );
2998
2999                 if ( $text === false ) {
3000                         $this->mTplDomCache[$titleText] = false;
3001                         return array( false, $title );
3002                 }
3003
3004                 $dom = $this->preprocessToDom( $text, self::PTD_FOR_INCLUSION );
3005                 $this->mTplDomCache[ $titleText ] = $dom;
3006
3007                 if (! $title->equals($cacheTitle)) {
3008                         $this->mTplRedirCache[$cacheTitle->getPrefixedDBkey()] =
3009                                 array( $title->getNamespace(),$cdb = $title->getDBkey() );
3010                 }
3011
3012                 return array( $dom, $title );
3013         }
3014
3015         /**
3016          * Fetch the unparsed text of a template and register a reference to it.
3017          */
3018         function fetchTemplateAndTitle( $title ) {
3019                 $templateCb = $this->mOptions->getTemplateCallback();
3020                 $stuff = call_user_func( $templateCb, $title );
3021                 $text = $stuff['text'];
3022                 $finalTitle = isset( $stuff['finalTitle'] ) ? $stuff['finalTitle'] : $title;
3023                 if ( isset( $stuff['deps'] ) ) {
3024                         foreach ( $stuff['deps'] as $dep ) {
3025                                 $this->mOutput->addTemplate( $dep['title'], $dep['page_id'], $dep['rev_id'] );
3026                         }
3027                 }
3028                 return array($text,$finalTitle);
3029         }
3030
3031         function fetchTemplate( $title ) {
3032                 $rv = $this->fetchTemplateAndTitle($title);
3033                 return $rv[0];
3034         }
3035
3036         /**
3037          * Static function to get a template
3038          * Can be overridden via ParserOptions::setTemplateCallback().
3039          */
3040         static function statelessFetchTemplate( $title ) {
3041                 $text = $skip = false;
3042                 $finalTitle = $title;
3043                 $deps = array();
3044
3045                 // Loop to fetch the article, with up to 1 redirect
3046                 for ( $i = 0; $i < 2 && is_object( $title ); $i++ ) {
3047                         # Give extensions a chance to select the revision instead
3048                         $id = false; // Assume current
3049                         wfRunHooks( 'BeforeParserFetchTemplateAndtitle', array( false, &$title, &$skip, &$id ) );
3050
3051                         if( $skip ) {
3052                                 $text = false;
3053                                 $deps[] = array(
3054                                         'title' => $title,
3055                                         'page_id' => $title->getArticleID(),
3056                                         'rev_id' => null );
3057                                 break;
3058                         }
3059                         $rev = $id ? Revision::newFromId( $id ) : Revision::newFromTitle( $title );
3060                         $rev_id = $rev ? $rev->getId() : 0;
3061
3062                         $deps[] = array(
3063                                 'title' => $title,
3064                                 'page_id' => $title->getArticleID(),
3065                                 'rev_id' => $rev_id );
3066
3067                         if( $rev ) {
3068                                 $text = $rev->getText();
3069                         } elseif( $title->getNamespace() == NS_MEDIAWIKI ) {
3070                                 global $wgLang;
3071                                 $message = $wgLang->lcfirst( $title->getText() );
3072                                 $text = wfMsgForContentNoTrans( $message );
3073                                 if( wfEmptyMsg( $message, $text ) ) {
3074                                         $text = false;
3075                                         break;
3076                                 }
3077                         } else {
3078                                 break;
3079                         }
3080                         if ( $text === false ) {
3081                                 break;
3082                         }
3083                         // Redirect?
3084                         $finalTitle = $title;
3085                         $title = Title::newFromRedirect( $text );
3086                 }
3087                 return array(
3088                         'text' => $text,
3089                         'finalTitle' => $finalTitle,
3090                         'deps' => $deps );
3091         }
3092
3093         /**
3094          * Transclude an interwiki link.
3095          */
3096         function interwikiTransclude( $title, $action ) {
3097                 global $wgEnableScaryTranscluding;
3098
3099                 if (!$wgEnableScaryTranscluding)
3100                         return wfMsg('scarytranscludedisabled');
3101
3102                 $url = $title->getFullUrl( "action=$action" );
3103
3104                 if (strlen($url) > 255)
3105                         return wfMsg('scarytranscludetoolong');
3106                 return $this->fetchScaryTemplateMaybeFromCache($url);
3107         }
3108
3109         function fetchScaryTemplateMaybeFromCache($url) {
3110                 global $wgTranscludeCacheExpiry;
3111                 $dbr = wfGetDB(DB_SLAVE);
3112                 $obj = $dbr->selectRow('transcache', array('tc_time', 'tc_contents'),
3113                                 array('tc_url' => $url));
3114                 if ($obj) {
3115                         $time = $obj->tc_time;
3116                         $text = $obj->tc_contents;
3117                         if ($time && time() < $time + $wgTranscludeCacheExpiry ) {
3118                                 return $text;
3119                         }
3120                 }
3121
3122                 $text = Http::get($url);
3123                 if (!$text)
3124                         return wfMsg('scarytranscludefailed', $url);
3125
3126                 $dbw = wfGetDB(DB_MASTER);
3127                 $dbw->replace('transcache', array('tc_url'), array(
3128                         'tc_url' => $url,
3129                         'tc_time' => time(),
3130                         'tc_contents' => $text));
3131                 return $text;
3132         }
3133
3134
3135         /**
3136          * Triple brace replacement -- used for template arguments
3137          * @private
3138          */
3139         function argSubstitution( $piece, $frame ) {
3140                 wfProfileIn( __METHOD__ );
3141
3142                 $error = false;
3143                 $parts = $piece['parts'];
3144                 $nameWithSpaces = $frame->expand( $piece['title'] );
3145                 $argName = trim( $nameWithSpaces );
3146                 $object = false;
3147                 $text = $frame->getArgument( $argName );
3148                 if (  $text === false && ( $this->ot['html'] || $this->ot['pre'] ) && $parts->getLength() > 0 ) {
3149                         # No match in frame, use the supplied default
3150                         $object = $parts->item( 0 )->getChildren();
3151                 }
3152                 if ( !$this->incrementIncludeSize( 'arg', strlen( $text ) ) ) {
3153                         $error = '<!-- WARNING: argument omitted, expansion size too large -->';
3154                 }
3155
3156                 if ( $text === false && $object === false ) {
3157                         # No match anywhere
3158                         $object = $frame->virtualBracketedImplode( '{{{', '|', '}}}', $nameWithSpaces, $parts );
3159                 }
3160                 if ( $error !== false ) {
3161                         $text .= $error;
3162                 }
3163                 if ( $object !== false ) {
3164                         $ret = array( 'object' => $object );
3165                 } else {
3166                         $ret = array( 'text' => $text );
3167                 }
3168
3169                 wfProfileOut( __METHOD__ );
3170                 return $ret;
3171         }
3172
3173         /**
3174          * Return the text to be used for a given extension tag.
3175          * This is the ghost of strip().
3176          *
3177          * @param array $params Associative array of parameters:
3178          *     name       PPNode for the tag name
3179          *     attr       PPNode for unparsed text where tag attributes are thought to be
3180          *     attributes Optional associative array of parsed attributes
3181          *     inner      Contents of extension element
3182          *     noClose    Original text did not have a close tag
3183          * @param PPFrame $frame
3184          */
3185         function extensionSubstitution( $params, $frame ) {
3186                 global $wgRawHtml, $wgContLang;
3187                 static $n = 1;
3188
3189                 $name = $frame->expand( $params['name'] );
3190                 $attrText = !isset( $params['attr'] ) ? null : $frame->expand( $params['attr'] );
3191                 $content = !isset( $params['inner'] ) ? null : $frame->expand( $params['inner'] );
3192
3193                 $marker = "{$this->mUniqPrefix}-$name-" . sprintf('%08X', $n++) . $this->mMarkerSuffix;
3194
3195                 if ( $this->ot['html'] ) {
3196                         $name = strtolower( $name );
3197
3198                         $attributes = Sanitizer::decodeTagAttributes( $attrText );
3199                         if ( isset( $params['attributes'] ) ) {
3200                                 $attributes = $attributes + $params['attributes'];
3201                         }
3202                         switch ( $name ) {
3203                                 case 'html':
3204                                         if( $wgRawHtml ) {
3205                                                 $output = $content;
3206                                                 break;
3207                                         } else {
3208                                                 throw new MWException( '<html> extension tag encountered unexpectedly' );
3209                                         }
3210                                 case 'nowiki':
3211                                         $output = Xml::escapeTagsOnly( $content );
3212                                         break;
3213                                 case 'math':
3214                                         $output = $wgContLang->armourMath(
3215                                                 MathRenderer::renderMath( $content, $attributes ) );
3216                                         break;
3217                                 case 'gallery':
3218                                         $output = $this->renderImageGallery( $content, $attributes );
3219                                         break;
3220                                 default:
3221                                         if( isset( $this->mTagHooks[$name] ) ) {
3222                                                 $output = call_user_func_array( $this->mTagHooks[$name],
3223                                                         array( $content, $attributes, $this ) );
3224                                         } else {
3225                                                 throw new MWException( "Invalid call hook $name" );
3226                                         }
3227                         }
3228                 } else {
3229                         if ( is_null( $attrText ) ) {
3230                                 $attrText = '';
3231                         }
3232                         if ( isset( $params['attributes'] ) ) {
3233                                 foreach ( $params['attributes'] as $attrName => $attrValue ) {
3234                                         $attrText .= ' ' . htmlspecialchars( $attrName ) . '="' .
3235                                                 htmlspecialchars( $attrValue ) . '"';
3236                                 }
3237                         }
3238                         if ( $content === null ) {
3239                                 $output = "<$name$attrText/>";
3240                         } else {
3241                                 $close = is_null( $params['close'] ) ? '' : $frame->expand( $params['close'] );
3242                                 $output = "<$name$attrText>$content$close";
3243                         }
3244                 }
3245
3246                 if ( $name == 'html' || $name == 'nowiki' ) {
3247                         $this->mStripState->nowiki->setPair( $marker, $output );
3248                 } else {
3249                         $this->mStripState->general->setPair( $marker, $output );
3250                 }
3251                 return $marker;
3252         }
3253
3254         /**
3255          * Increment an include size counter
3256          *
3257          * @param string $type The type of expansion
3258          * @param integer $size The size of the text
3259          * @return boolean False if this inclusion would take it over the maximum, true otherwise
3260          */
3261         function incrementIncludeSize( $type, $size ) {
3262                 if ( $this->mIncludeSizes[$type] + $size > $this->mOptions->getMaxIncludeSize( $type ) ) {
3263                         return false;
3264                 } else {
3265                         $this->mIncludeSizes[$type] += $size;
3266                         return true;
3267                 }
3268         }
3269
3270         /**
3271          * Detect __NOGALLERY__ magic word and set a placeholder
3272          */
3273         function stripNoGallery( &$text ) {
3274                 # if the string __NOGALLERY__ (not case-sensitive) occurs in the HTML,
3275                 # do not add TOC
3276                 $mw = MagicWord::get( 'nogallery' );
3277                 $this->mOutput->mNoGallery = $mw->matchAndRemove( $text ) ;
3278         }
3279
3280         /**
3281          * Find the first __TOC__ magic word and set a <!--MWTOC-->
3282          * placeholder that will then be replaced by the real TOC in
3283          * ->formatHeadings, this works because at this points real
3284          * comments will have already been discarded by the sanitizer.
3285          *
3286          * Any additional __TOC__ magic words left over will be discarded
3287          * as there can only be one TOC on the page.
3288          */
3289         function stripToc( $text ) {
3290                 # if the string __NOTOC__ (not case-sensitive) occurs in the HTML,
3291                 # do not add TOC
3292                 $mw = MagicWord::get( 'notoc' );
3293                 if( $mw->matchAndRemove( $text ) ) {
3294                         $this->mShowToc = false;
3295                 }
3296
3297                 $mw = MagicWord::get( 'toc' );
3298                 if( $mw->match( $text ) ) {
3299                         $this->mShowToc = true;
3300                         $this->mForceTocPosition = true;
3301
3302                         // Set a placeholder. At the end we'll fill it in with the TOC.
3303                         $text = $mw->replace( '<!--MWTOC-->', $text, 1 );
3304
3305                         // Only keep the first one.
3306                         $text = $mw->replace( '', $text );
3307                 }
3308                 return $text;
3309         }
3310
3311         /**
3312          * This function accomplishes several tasks:
3313          * 1) Auto-number headings if that option is enabled
3314          * 2) Add an [edit] link to sections for users who have enabled the option and can edit the page
3315          * 3) Add a Table of contents on the top for users who have enabled the option
3316          * 4) Auto-anchor headings
3317          *
3318          * It loops through all headlines, collects the necessary data, then splits up the
3319          * string and re-inserts the newly formatted headlines.
3320          *
3321          * @param string $text
3322          * @param boolean $isMain
3323          * @private
3324          */
3325         function formatHeadings( $text, $isMain=true ) {
3326                 global $wgMaxTocLevel, $wgContLang;
3327
3328                 $doNumberHeadings = $this->mOptions->getNumberHeadings();
3329                 if( !$this->mTitle->quickUserCan( 'edit' ) ) {
3330                         $showEditLink = 0;
3331                 } else {
3332                         $showEditLink = $this->mOptions->getEditSection();
3333                 }
3334
3335                 # Inhibit editsection links if requested in the page
3336                 $esw =& MagicWord::get( 'noeditsection' );
3337                 if( $esw->matchAndRemove( $text ) ) {
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                 $mw =& MagicWord::get( 'newsectionlink' );
3354                 if( $mw->matchAndRemove( $text ) )
3355                         $this->mOutput->setNewSection( true );
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                 $mw =& MagicWord::get( 'forcetoc' );
3360                 if ($mw->matchAndRemove( $text ) ) {
3361                         $this->mShowToc = true;
3362                         $enoughToc = true;
3363                 }
3364
3365                 # We need this to perform operations on the HTML
3366                 $sk = $this->mOptions->getSkin();
3367
3368                 # headline counter
3369                 $headlineCount = 0;
3370                 $numVisible = 0;
3371
3372                 # Ugh .. the TOC should have neat indentation levels which can be
3373                 # passed to the skin functions. These are determined here
3374                 $toc = '';
3375                 $full = '';
3376                 $head = array();
3377                 $sublevelCount = array();
3378                 $levelCount = array();
3379                 $toclevel = 0;
3380                 $level = 0;
3381                 $prevlevel = 0;
3382                 $toclevel = 0;
3383                 $prevtoclevel = 0;
3384                 $markerRegex = "{$this->mUniqPrefix}-h-(\d+)-{$this->mMarkerSuffix}";
3385                 $baseTitleText = $this->mTitle->getPrefixedDBkey();
3386                 $tocraw = array();
3387
3388                 foreach( $matches[3] as $headline ) {
3389                         $isTemplate = false;
3390                         $titleText = false;
3391                         $sectionIndex = false;
3392                         $numbering = '';
3393                         $markerMatches = array();
3394                         if (preg_match("/^$markerRegex/", $headline, $markerMatches)) {
3395                                 $serial = $markerMatches[1];
3396                                 list( $titleText, $sectionIndex ) = $this->mHeadings[$serial];
3397                                 $isTemplate = ($titleText != $baseTitleText);
3398                                 $headline = preg_replace("/^$markerRegex/", "", $headline);
3399                         }
3400
3401                         if( $toclevel ) {
3402                                 $prevlevel = $level;
3403                                 $prevtoclevel = $toclevel;
3404                         }
3405                         $level = $matches[1][$headlineCount];
3406
3407                         if( $doNumberHeadings || $enoughToc ) {
3408
3409                                 if ( $level > $prevlevel ) {
3410                                         # Increase TOC level
3411                                         $toclevel++;
3412                                         $sublevelCount[$toclevel] = 0;
3413                                         if( $toclevel<$wgMaxTocLevel ) {
3414                                                 $prevtoclevel = $toclevel;
3415                                                 $toc .= $sk->tocIndent();
3416                                                 $numVisible++;
3417                                         }
3418                                 }
3419                                 elseif ( $level < $prevlevel && $toclevel > 1 ) {
3420                                         # Decrease TOC level, find level to jump to
3421
3422                                         if ( $toclevel == 2 && $level <= $levelCount[1] ) {
3423                                                 # Can only go down to level 1
3424                                                 $toclevel = 1;
3425                                         } else {
3426                                                 for ($i = $toclevel; $i > 0; $i--) {
3427                                                         if ( $levelCount[$i] == $level ) {
3428                                                                 # Found last matching level
3429                                                                 $toclevel = $i;
3430                                                                 break;
3431                                                         }
3432                                                         elseif ( $levelCount[$i] < $level ) {
3433                                                                 # Found first matching level below current level
3434                                                                 $toclevel = $i + 1;
3435                                                                 break;
3436                                                         }
3437                                                 }
3438                                         }
3439                                         if( $toclevel<$wgMaxTocLevel ) {
3440                                                 if($prevtoclevel < $wgMaxTocLevel) {
3441                                                         # Unindent only if the previous toc level was shown :p
3442                                                         $toc .= $sk->tocUnindent( $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                         $refers[$headlineCount] = $safeHeadline;
3502
3503                         # count how many in assoc. array so we can track dupes in anchors
3504                         isset( $refers[$safeHeadline] ) ? $refers[$safeHeadline]++ : $refers[$safeHeadline] = 1;
3505                         $refcount[$headlineCount] = $refers[$safeHeadline];
3506
3507                         # Don't number the heading if it is the only one (looks silly)
3508                         if( $doNumberHeadings && count( $matches[3] ) > 1) {
3509                                 # the two are different if the line contains a link
3510                                 $headline=$numbering . ' ' . $headline;
3511                         }
3512
3513                         # Create the anchor for linking from the TOC to the section
3514                         $anchor = $safeHeadline;
3515                         if($refcount[$headlineCount] > 1 ) {
3516                                 $anchor .= '_' . $refcount[$headlineCount];
3517                         }
3518                         if( $enoughToc && ( !isset($wgMaxTocLevel) || $toclevel<$wgMaxTocLevel ) ) {
3519                                 $toc .= $sk->tocLine($anchor, $tocline, $numbering, $toclevel);
3520                                 $tocraw[] = array( 'toclevel' => $toclevel, 'level' => $level, 'line' => $tocline, 'number' => $numbering );
3521                         }
3522                         # give headline the correct <h#> tag
3523                         if( $showEditLink && $sectionIndex !== false ) {
3524                                 if( $isTemplate ) {
3525                                         # Put a T flag in the section identifier, to indicate to extractSections()
3526                                         # that sections inside <includeonly> should be counted.
3527                                         $editlink = $sk->editSectionLinkForOther($titleText, "T-$sectionIndex");
3528                                 } else {
3529                                         $editlink = $sk->editSectionLink($this->mTitle, $sectionIndex, $headlineHint);
3530                                 }
3531                         } else {
3532                                 $editlink = '';
3533                         }
3534                         $head[$headlineCount] = $sk->makeHeadline( $level, $matches['attrib'][$headlineCount], $anchor, $headline, $editlink );
3535
3536                         $headlineCount++;
3537                 }
3538
3539                 $this->mOutput->setSections( $tocraw );
3540
3541                 # Never ever show TOC if no headers
3542                 if( $numVisible < 1 ) {
3543                         $enoughToc = false;
3544                 }
3545
3546                 if( $enoughToc ) {
3547                         if( $prevtoclevel > 0 && $prevtoclevel < $wgMaxTocLevel ) {
3548                                 $toc .= $sk->tocUnindent( $prevtoclevel - 1 );
3549                         }
3550                         $toc = $sk->tocList( $toc );
3551                 }
3552
3553                 # split up and insert constructed headlines
3554
3555                 $blocks = preg_split( '/<H[1-6].*?' . '>.*?<\/H[1-6]>/i', $text );
3556                 $i = 0;
3557
3558                 foreach( $blocks as $block ) {
3559                         if( $showEditLink && $headlineCount > 0 && $i == 0 && $block != "\n" ) {
3560                                 # This is the [edit] link that appears for the top block of text when
3561                                 # section editing is enabled
3562
3563                                 # Disabled because it broke block formatting
3564                                 # For example, a bullet point in the top line
3565                                 # $full .= $sk->editSectionLink(0);
3566                         }
3567                         $full .= $block;
3568                         if( $enoughToc && !$i && $isMain && !$this->mForceTocPosition ) {
3569                                 # Top anchor now in skin
3570                                 $full = $full.$toc;
3571                         }
3572
3573                         if( !empty( $head[$i] ) ) {
3574                                 $full .= $head[$i];
3575                         }
3576                         $i++;
3577                 }
3578                 if( $this->mForceTocPosition ) {
3579                         return str_replace( '<!--MWTOC-->', $toc, $full );
3580                 } else {
3581                         return $full;
3582                 }
3583         }
3584
3585         /**
3586          * Transform wiki markup when saving a page by doing \r\n -> \n
3587          * conversion, substitting signatures, {{subst:}} templates, etc.
3588          *
3589          * @param string $text the text to transform
3590          * @param Title &$title the Title object for the current article
3591          * @param User &$user the User object describing the current user
3592          * @param ParserOptions $options parsing options
3593          * @param bool $clearState whether to clear the parser state first
3594          * @return string the altered wiki markup
3595          * @public
3596          */
3597         function preSaveTransform( $text, &$title, $user, $options, $clearState = true ) {
3598                 $this->mOptions = $options;
3599                 $this->setTitle( $title );
3600                 $this->setOutputType( OT_WIKI );
3601
3602                 if ( $clearState ) {
3603                         $this->clearState();
3604                 }
3605
3606                 $pairs = array(
3607                         "\r\n" => "\n",
3608                 );
3609                 $text = str_replace( array_keys( $pairs ), array_values( $pairs ), $text );
3610                 $text = $this->pstPass2( $text, $user );
3611                 $text = $this->mStripState->unstripBoth( $text );
3612                 return $text;
3613         }
3614
3615         /**
3616          * Pre-save transform helper function
3617          * @private
3618          */
3619         function pstPass2( $text, $user ) {
3620                 global $wgContLang, $wgLocaltimezone;
3621
3622                 /* Note: This is the timestamp saved as hardcoded wikitext to
3623                  * the database, we use $wgContLang here in order to give
3624                  * everyone the same signature and use the default one rather
3625                  * than the one selected in each user's preferences.
3626                  */
3627                 if ( isset( $wgLocaltimezone ) ) {
3628                         $oldtz = getenv( 'TZ' );
3629                         putenv( 'TZ='.$wgLocaltimezone );
3630                 }
3631                 $d = $wgContLang->timeanddate( date( 'YmdHis' ), false, false) .
3632                   ' (' . date( 'T' ) . ')';
3633                 if ( isset( $wgLocaltimezone ) ) {
3634                         putenv( 'TZ='.$oldtz );
3635                 }
3636
3637                 # Variable replacement
3638                 # Because mOutputType is OT_WIKI, this will only process {{subst:xxx}} type tags
3639                 $text = $this->replaceVariables( $text );
3640
3641                 # Strip out <nowiki> etc. added via replaceVariables
3642                 #$text = $this->strip( $text, $this->mStripState, false, array( 'gallery' ) );
3643
3644                 # Signatures
3645                 $sigText = $this->getUserSig( $user );
3646                 $text = strtr( $text, array(
3647                         '~~~~~' => $d,
3648                         '~~~~' => "$sigText $d",
3649                         '~~~' => $sigText
3650                 ) );
3651
3652                 # Context links: [[|name]] and [[name (context)|]]
3653                 #
3654                 global $wgLegalTitleChars;
3655                 $tc = "[$wgLegalTitleChars]";
3656                 $nc = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
3657
3658                 $p1 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\))\\|]]/";            # [[ns:page (context)|]]
3659                 $p3 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\)|)(, $tc+|)\\|]]/";  # [[ns:page (context), context|]]
3660                 $p2 = "/\[\[\\|($tc+)]]/";                                      # [[|page]]
3661
3662                 # try $p1 first, to turn "[[A, B (C)|]]" into "[[A, B (C)|A, B]]"
3663                 $text = preg_replace( $p1, '[[\\1\\2\\3|\\2]]', $text );
3664                 $text = preg_replace( $p3, '[[\\1\\2\\3\\4|\\2]]', $text );
3665
3666                 $t = $this->mTitle->getText();
3667                 $m = array();
3668                 if ( preg_match( "/^($nc+:|)$tc+?( \\($tc+\\))$/", $t, $m ) ) {
3669                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
3670                 } elseif ( preg_match( "/^($nc+:|)$tc+?(, $tc+|)$/", $t, $m ) && '' != "$m[1]$m[2]" ) {
3671                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
3672                 } else {
3673                         # if there's no context, don't bother duplicating the title
3674                         $text = preg_replace( $p2, '[[\\1]]', $text );
3675                 }
3676
3677                 # Trim trailing whitespace
3678                 $text = rtrim( $text );
3679
3680                 return $text;
3681         }
3682
3683         /**
3684          * Fetch the user's signature text, if any, and normalize to
3685          * validated, ready-to-insert wikitext.
3686          *
3687          * @param User $user
3688          * @return string
3689          * @private
3690          */
3691         function getUserSig( &$user ) {
3692                 global $wgMaxSigChars;
3693
3694                 $username = $user->getName();
3695                 $nickname = $user->getOption( 'nickname' );
3696                 $nickname = $nickname === '' ? $username : $nickname;
3697
3698                 if( mb_strlen( $nickname ) > $wgMaxSigChars ) {
3699                         $nickname = $username;
3700                         wfDebug( __METHOD__ . ": $username has overlong signature.\n" );
3701                 } elseif( $user->getBoolOption( 'fancysig' ) !== false ) {
3702                         # Sig. might contain markup; validate this
3703                         if( $this->validateSig( $nickname ) !== false ) {
3704                                 # Validated; clean up (if needed) and return it
3705                                 return $this->cleanSig( $nickname, true );
3706                         } else {
3707                                 # Failed to validate; fall back to the default
3708                                 $nickname = $username;
3709                                 wfDebug( "Parser::getUserSig: $username has bad XML tags in signature.\n" );
3710                         }
3711                 }
3712
3713                 // Make sure nickname doesnt get a sig in a sig
3714                 $nickname = $this->cleanSigInSig( $nickname );
3715
3716                 # If we're still here, make it a link to the user page
3717                 $userText = wfEscapeWikiText( $username );
3718                 $nickText = wfEscapeWikiText( $nickname );
3719                 if ( $user->isAnon() )  {
3720                         return wfMsgExt( 'signature-anon', array( 'content', 'parsemag' ), $userText, $nickText );
3721                 } else {
3722                         return wfMsgExt( 'signature', array( 'content', 'parsemag' ), $userText, $nickText );
3723                 }
3724         }
3725
3726         /**
3727          * Check that the user's signature contains no bad XML
3728          *
3729          * @param string $text
3730          * @return mixed An expanded string, or false if invalid.
3731          */
3732         function validateSig( $text ) {
3733                 return( wfIsWellFormedXmlFragment( $text ) ? $text : false );
3734         }
3735
3736         /**
3737          * Clean up signature text
3738          *
3739          * 1) Strip ~~~, ~~~~ and ~~~~~ out of signatures @see cleanSigInSig
3740          * 2) Substitute all transclusions
3741          *
3742          * @param string $text
3743          * @param $parsing Whether we're cleaning (preferences save) or parsing
3744          * @return string Signature text
3745          */
3746         function cleanSig( $text, $parsing = false ) {
3747                 if ( !$parsing ) {
3748                         global $wgTitle;
3749                         $this->clearState();
3750                         $this->setTitle( $wgTitle );
3751                         $this->mOptions = new ParserOptions;
3752                         $this->setOutputType = OT_PREPROCESS;
3753                 }
3754
3755                 # FIXME: regex doesn't respect extension tags or nowiki
3756                 #  => Move this logic to braceSubstitution()
3757                 $substWord = MagicWord::get( 'subst' );
3758                 $substRegex = '/\{\{(?!(?:' . $substWord->getBaseRegex() . '))/x' . $substWord->getRegexCase();
3759                 $substText = '{{' . $substWord->getSynonym( 0 );
3760
3761                 $text = preg_replace( $substRegex, $substText, $text );
3762                 $text = $this->cleanSigInSig( $text );
3763                 $dom = $this->preprocessToDom( $text );
3764                 $frame = $this->getPreprocessor()->newFrame();
3765                 $text = $frame->expand( $dom );
3766
3767                 if ( !$parsing ) {
3768                         $text = $this->mStripState->unstripBoth( $text );
3769                 }
3770
3771                 return $text;
3772         }
3773
3774         /**
3775          * Strip ~~~, ~~~~ and ~~~~~ out of signatures
3776          * @param string $text
3777          * @return string Signature text with /~{3,5}/ removed
3778          */
3779         function cleanSigInSig( $text ) {
3780                 $text = preg_replace( '/~{3,5}/', '', $text );
3781                 return $text;
3782         }
3783
3784         /**
3785          * Set up some variables which are usually set up in parse()
3786          * so that an external function can call some class members with confidence
3787          * @public
3788          */
3789         function startExternalParse( &$title, $options, $outputType, $clearState = true ) {
3790                 $this->setTitle( $title );
3791                 $this->mOptions = $options;
3792                 $this->setOutputType( $outputType );
3793                 if ( $clearState ) {
3794                         $this->clearState();
3795                 }
3796         }
3797
3798         /**
3799          * Wrapper for preprocess()
3800          *
3801          * @param string $text the text to preprocess
3802          * @param ParserOptions $options  options
3803          * @return string
3804          * @public
3805          */
3806         function transformMsg( $text, $options ) {
3807                 global $wgTitle;
3808                 static $executing = false;
3809
3810                 $fname = "Parser::transformMsg";
3811
3812                 # Guard against infinite recursion
3813                 if ( $executing ) {
3814                         return $text;
3815                 }
3816                 $executing = true;
3817
3818                 wfProfileIn($fname);
3819                 $text = $this->preprocess( $text, $wgTitle, $options );
3820
3821                 $executing = false;
3822                 wfProfileOut($fname);
3823                 return $text;
3824         }
3825
3826         /**
3827          * Create an HTML-style tag, e.g. <yourtag>special text</yourtag>
3828          * The callback should have the following form:
3829          *    function myParserHook( $text, $params, &$parser ) { ... }
3830          *
3831          * Transform and return $text. Use $parser for any required context, e.g. use
3832          * $parser->getTitle() and $parser->getOptions() not $wgTitle or $wgOut->mParserOptions
3833          *
3834          * @public
3835          *
3836          * @param mixed $tag The tag to use, e.g. 'hook' for <hook>
3837          * @param mixed $callback The callback function (and object) to use for the tag
3838          *
3839          * @return The old value of the mTagHooks array associated with the hook
3840          */
3841         function setHook( $tag, $callback ) {
3842                 $tag = strtolower( $tag );
3843                 $oldVal = isset( $this->mTagHooks[$tag] ) ? $this->mTagHooks[$tag] : null;
3844                 $this->mTagHooks[$tag] = $callback;
3845                 $this->mStripList[] = $tag;
3846
3847                 return $oldVal;
3848         }
3849
3850         function setTransparentTagHook( $tag, $callback ) {
3851                 $tag = strtolower( $tag );
3852                 $oldVal = isset( $this->mTransparentTagHooks[$tag] ) ? $this->mTransparentTagHooks[$tag] : null;
3853                 $this->mTransparentTagHooks[$tag] = $callback;
3854
3855                 return $oldVal;
3856         }
3857
3858         /**
3859          * Remove all tag hooks
3860          */
3861         function clearTagHooks() {
3862                 $this->mTagHooks = array();
3863                 $this->mStripList = $this->mDefaultStripList;
3864         }
3865
3866         /**
3867          * Create a function, e.g. {{sum:1|2|3}}
3868          * The callback function should have the form:
3869          *    function myParserFunction( &$parser, $arg1, $arg2, $arg3 ) { ... }
3870          *
3871          * The callback may either return the text result of the function, or an array with the text
3872          * in element 0, and a number of flags in the other elements. The names of the flags are
3873          * specified in the keys. Valid flags are:
3874          *   found                     The text returned is valid, stop processing the template. This
3875          *                             is on by default.
3876          *   nowiki                    Wiki markup in the return value should be escaped
3877          *   isHTML                    The returned text is HTML, armour it against wikitext transformation
3878          *
3879          * @public
3880          *
3881          * @param string $id The magic word ID
3882          * @param mixed $callback The callback function (and object) to use
3883          * @param integer $flags a combination of the following flags:
3884          *                SFH_NO_HASH No leading hash, i.e. {{plural:...}} instead of {{#if:...}}
3885          *
3886          * @return The old callback function for this name, if any
3887          */
3888         function setFunctionHook( $id, $callback, $flags = 0 ) {
3889                 $oldVal = isset( $this->mFunctionHooks[$id] ) ? $this->mFunctionHooks[$id][0] : null;
3890                 $this->mFunctionHooks[$id] = array( $callback, $flags );
3891
3892                 # Add to function cache
3893                 $mw = MagicWord::get( $id );
3894                 if( !$mw )
3895                         throw new MWException( 'Parser::setFunctionHook() expecting a magic word identifier.' );
3896
3897                 $synonyms = $mw->getSynonyms();
3898                 $sensitive = intval( $mw->isCaseSensitive() );
3899
3900                 foreach ( $synonyms as $syn ) {
3901                         # Case
3902                         if ( !$sensitive ) {
3903                                 $syn = strtolower( $syn );
3904                         }
3905                         # Add leading hash
3906                         if ( !( $flags & SFH_NO_HASH ) ) {
3907                                 $syn = '#' . $syn;
3908                         }
3909                         # Remove trailing colon
3910                         if ( substr( $syn, -1, 1 ) == ':' ) {
3911                                 $syn = substr( $syn, 0, -1 );
3912                         }
3913                         $this->mFunctionSynonyms[$sensitive][$syn] = $id;
3914                 }
3915                 return $oldVal;
3916         }
3917
3918         /**
3919          * Get all registered function hook identifiers
3920          *
3921          * @return array
3922          */
3923         function getFunctionHooks() {
3924                 return array_keys( $this->mFunctionHooks );
3925         }
3926
3927         /**
3928          * Replace <!--LINK--> link placeholders with actual links, in the buffer
3929          * Placeholders created in Skin::makeLinkObj()
3930          * Returns an array of link CSS classes, indexed by PDBK.
3931          * $options is a bit field, RLH_FOR_UPDATE to select for update
3932          */
3933         function replaceLinkHolders( &$text, $options = 0 ) {
3934                 global $wgUser;
3935                 global $wgContLang;
3936
3937                 $fname = 'Parser::replaceLinkHolders';
3938                 wfProfileIn( $fname );
3939
3940                 $pdbks = array();
3941                 $colours = array();
3942                 $linkcolour_ids = array();
3943                 $sk = $this->mOptions->getSkin();
3944                 $linkCache =& LinkCache::singleton();
3945
3946                 if ( !empty( $this->mLinkHolders['namespaces'] ) ) {
3947                         wfProfileIn( $fname.'-check' );
3948                         $dbr = wfGetDB( DB_SLAVE );
3949                         $page = $dbr->tableName( 'page' );
3950                         $threshold = $wgUser->getOption('stubthreshold');
3951
3952                         # Sort by namespace
3953                         asort( $this->mLinkHolders['namespaces'] );
3954
3955                         # Generate query
3956                         $query = false;
3957                         $current = null;
3958                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
3959                                 # Make title object
3960                                 $title = $this->mLinkHolders['titles'][$key];
3961
3962                                 # Skip invalid entries.
3963                                 # Result will be ugly, but prevents crash.
3964                                 if ( is_null( $title ) ) {
3965                                         continue;
3966                                 }
3967                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
3968
3969                                 # Check if it's a static known link, e.g. interwiki
3970                                 if ( $title->isAlwaysKnown() ) {
3971                                         $colours[$pdbk] = '';
3972                                 } elseif ( ( $id = $linkCache->getGoodLinkID( $pdbk ) ) != 0 ) {
3973                                         $colours[$pdbk] = '';
3974                                         $this->mOutput->addLink( $title, $id );
3975                                 } elseif ( $linkCache->isBadLink( $pdbk ) ) {
3976                                         $colours[$pdbk] = 'new';
3977                                 } elseif ( $title->getNamespace() == NS_SPECIAL && !SpecialPage::exists( $pdbk ) ) {
3978                                         $colours[$pdbk] = 'new';
3979                                 } else {
3980                                         # Not in the link cache, add it to the query
3981                                         if ( !isset( $current ) ) {
3982                                                 $current = $ns;
3983                                                 $query =  "SELECT page_id, page_namespace, page_title";
3984                                                 if ( $threshold > 0 ) {
3985                                                         $query .= ', page_len, page_is_redirect';
3986                                                 }
3987                                                 $query .= " FROM $page WHERE (page_namespace=$ns AND page_title IN(";
3988                                         } elseif ( $current != $ns ) {
3989                                                 $current = $ns;
3990                                                 $query .= ")) OR (page_namespace=$ns AND page_title IN(";
3991                                         } else {
3992                                                 $query .= ', ';
3993                                         }
3994
3995                                         $query .= $dbr->addQuotes( $this->mLinkHolders['dbkeys'][$key] );
3996                                 }
3997                         }
3998                         if ( $query ) {
3999                                 $query .= '))';
4000                                 if ( $options & RLH_FOR_UPDATE ) {
4001                                         $query .= ' FOR UPDATE';
4002                                 }
4003
4004                                 $res = $dbr->query( $query, $fname );
4005
4006                                 # Fetch data and form into an associative array
4007                                 # non-existent = broken
4008                                 while ( $s = $dbr->fetchObject($res) ) {
4009                                         $title = Title::makeTitle( $s->page_namespace, $s->page_title );
4010                                         $pdbk = $title->getPrefixedDBkey();
4011                                         $linkCache->addGoodLinkObj( $s->page_id, $title );
4012                                         $this->mOutput->addLink( $title, $s->page_id );
4013                                         $colours[$pdbk] = $sk->getLinkColour( $s, $threshold );
4014                                         //add id to the extension todolist
4015                                         $linkcolour_ids[$s->page_id] = $pdbk;
4016                                 }
4017                                 //pass an array of page_ids to an extension
4018                                 wfRunHooks( 'GetLinkColours', array( $linkcolour_ids, &$colours ) );
4019                         }
4020                         wfProfileOut( $fname.'-check' );
4021
4022                         # Do a second query for different language variants of links and categories
4023                         if($wgContLang->hasVariants()){
4024                                 $linkBatch = new LinkBatch();
4025                                 $variantMap = array(); // maps $pdbkey_Variant => $keys (of link holders)
4026                                 $categoryMap = array(); // maps $category_variant => $category (dbkeys)
4027                                 $varCategories = array(); // category replacements oldDBkey => newDBkey
4028
4029                                 $categories = $this->mOutput->getCategoryLinks();
4030
4031                                 // Add variants of links to link batch
4032                                 foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
4033                                         $title = $this->mLinkHolders['titles'][$key];
4034                                         if ( is_null( $title ) )
4035                                                 continue;
4036
4037                                         $pdbk = $title->getPrefixedDBkey();
4038                                         $titleText = $title->getText();
4039
4040                                         // generate all variants of the link title text
4041                                         $allTextVariants = $wgContLang->convertLinkToAllVariants($titleText);
4042
4043                                         // if link was not found (in first query), add all variants to query
4044                                         if ( !isset($colours[$pdbk]) ){
4045                                                 foreach($allTextVariants as $textVariant){
4046                                                         if($textVariant != $titleText){
4047                                                                 $variantTitle = Title::makeTitle( $ns, $textVariant );
4048                                                                 if(is_null($variantTitle)) continue;
4049                                                                 $linkBatch->addObj( $variantTitle );
4050                                                                 $variantMap[$variantTitle->getPrefixedDBkey()][] = $key;
4051                                                         }
4052                                                 }
4053                                         }
4054                                 }
4055
4056                                 // process categories, check if a category exists in some variant
4057                                 foreach( $categories as $category ){
4058                                         $variants = $wgContLang->convertLinkToAllVariants($category);
4059                                         foreach($variants as $variant){
4060                                                 if($variant != $category){
4061                                                         $variantTitle = Title::newFromDBkey( Title::makeName(NS_CATEGORY,$variant) );
4062                                                         if(is_null($variantTitle)) continue;
4063                                                         $linkBatch->addObj( $variantTitle );
4064                                                         $categoryMap[$variant] = $category;
4065                                                 }
4066                                         }
4067                                 }
4068
4069
4070                                 if(!$linkBatch->isEmpty()){
4071                                         // construct query
4072                                         $titleClause = $linkBatch->constructSet('page', $dbr);
4073
4074                                         $variantQuery =  "SELECT page_id, page_namespace, page_title";
4075                                         if ( $threshold > 0 ) {
4076                                                 $variantQuery .= ', page_len, page_is_redirect';
4077                                         }
4078
4079                                         $variantQuery .= " FROM $page WHERE $titleClause";
4080                                         if ( $options & RLH_FOR_UPDATE ) {
4081                                                 $variantQuery .= ' FOR UPDATE';
4082                                         }
4083
4084                                         $varRes = $dbr->query( $variantQuery, $fname );
4085
4086                                         // for each found variants, figure out link holders and replace
4087                                         while ( $s = $dbr->fetchObject($varRes) ) {
4088
4089                                                 $variantTitle = Title::makeTitle( $s->page_namespace, $s->page_title );
4090                                                 $varPdbk = $variantTitle->getPrefixedDBkey();
4091                                                 $vardbk = $variantTitle->getDBkey();
4092
4093                                                 $holderKeys = array();
4094                                                 if(isset($variantMap[$varPdbk])){
4095                                                         $holderKeys = $variantMap[$varPdbk];
4096                                                         $linkCache->addGoodLinkObj( $s->page_id, $variantTitle );
4097                                                         $this->mOutput->addLink( $variantTitle, $s->page_id );
4098                                                 }
4099
4100                                                 // loop over link holders
4101                                                 foreach($holderKeys as $key){
4102                                                         $title = $this->mLinkHolders['titles'][$key];
4103                                                         if ( is_null( $title ) ) continue;
4104
4105                                                         $pdbk = $title->getPrefixedDBkey();
4106
4107                                                         if(!isset($colours[$pdbk])){
4108                                                                 // found link in some of the variants, replace the link holder data
4109                                                                 $this->mLinkHolders['titles'][$key] = $variantTitle;
4110                                                                 $this->mLinkHolders['dbkeys'][$key] = $variantTitle->getDBkey();
4111
4112                                                                 // set pdbk and colour
4113                                                                 $pdbks[$key] = $varPdbk;
4114                                                                 $colours[$varPdbk] = $sk->getLinkColour( $s, $threshold );
4115                                                                 $linkcolour_ids[$s->page_id] = $pdbk;
4116                                                         }
4117                                                         wfRunHooks( 'GetLinkColours', array( $linkcolour_ids, &$colours ) );
4118                                                 }
4119
4120                                                 // check if the object is a variant of a category
4121                                                 if(isset($categoryMap[$vardbk])){
4122                                                         $oldkey = $categoryMap[$vardbk];
4123                                                         if($oldkey != $vardbk)
4124                                                                 $varCategories[$oldkey]=$vardbk;
4125                                                 }
4126                                         }
4127
4128                                         // rebuild the categories in original order (if there are replacements)
4129                                         if(count($varCategories)>0){
4130                                                 $newCats = array();
4131                                                 $originalCats = $this->mOutput->getCategories();
4132                                                 foreach($originalCats as $cat => $sortkey){
4133                                                         // make the replacement
4134                                                         if( array_key_exists($cat,$varCategories) )
4135                                                                 $newCats[$varCategories[$cat]] = $sortkey;
4136                                                         else $newCats[$cat] = $sortkey;
4137                                                 }
4138                                                 $this->mOutput->setCategoryLinks($newCats);
4139                                         }
4140                                 }
4141                         }
4142
4143                         # Construct search and replace arrays
4144                         wfProfileIn( $fname.'-construct' );
4145                         $replacePairs = array();
4146                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
4147                                 $pdbk = $pdbks[$key];
4148                                 $searchkey = "<!--LINK $key-->";
4149                                 $title = $this->mLinkHolders['titles'][$key];
4150                                 if ( !isset( $colours[$pdbk] ) || $colours[$pdbk] == 'new' ) {
4151                                         $linkCache->addBadLinkObj( $title );
4152                                         $colours[$pdbk] = 'new';
4153                                         $this->mOutput->addLink( $title, 0 );
4154                                         $replacePairs[$searchkey] = $sk->makeBrokenLinkObj( $title,
4155                                                                         $this->mLinkHolders['texts'][$key],
4156                                                                         $this->mLinkHolders['queries'][$key] );
4157                                 } else {
4158                                         $replacePairs[$searchkey] = $sk->makeColouredLinkObj( $title, $colours[$pdbk],
4159                                                                         $this->mLinkHolders['texts'][$key],
4160                                                                         $this->mLinkHolders['queries'][$key] );
4161                                 }
4162                         }
4163                         $replacer = new HashtableReplacer( $replacePairs, 1 );
4164                         wfProfileOut( $fname.'-construct' );
4165
4166                         # Do the thing
4167                         wfProfileIn( $fname.'-replace' );
4168                         $text = preg_replace_callback(
4169                                 '/(<!--LINK .*?-->)/',
4170                                 $replacer->cb(),
4171                                 $text);
4172
4173                         wfProfileOut( $fname.'-replace' );
4174                 }
4175
4176                 # Now process interwiki link holders
4177                 # This is quite a bit simpler than internal links
4178                 if ( !empty( $this->mInterwikiLinkHolders['texts'] ) ) {
4179                         wfProfileIn( $fname.'-interwiki' );
4180                         # Make interwiki link HTML
4181                         $replacePairs = array();
4182                         foreach( $this->mInterwikiLinkHolders['texts'] as $key => $link ) {
4183                                 $title = $this->mInterwikiLinkHolders['titles'][$key];
4184                                 $replacePairs[$key] = $sk->makeLinkObj( $title, $link );
4185                         }
4186                         $replacer = new HashtableReplacer( $replacePairs, 1 );
4187
4188                         $text = preg_replace_callback(
4189                                 '/<!--IWLINK (.*?)-->/',
4190                                 $replacer->cb(),
4191                                 $text );
4192                         wfProfileOut( $fname.'-interwiki' );
4193                 }
4194
4195                 wfProfileOut( $fname );
4196                 return $colours;
4197         }
4198
4199         /**
4200          * Replace <!--LINK--> link placeholders with plain text of links
4201          * (not HTML-formatted).
4202          * @param string $text
4203          * @return string
4204          */
4205         function replaceLinkHoldersText( $text ) {
4206                 $fname = 'Parser::replaceLinkHoldersText';
4207                 wfProfileIn( $fname );
4208
4209                 $text = preg_replace_callback(
4210                         '/<!--(LINK|IWLINK) (.*?)-->/',
4211                         array( &$this, 'replaceLinkHoldersTextCallback' ),
4212                         $text );
4213
4214                 wfProfileOut( $fname );
4215                 return $text;
4216         }
4217
4218         /**
4219          * @param array $matches
4220          * @return string
4221          * @private
4222          */
4223         function replaceLinkHoldersTextCallback( $matches ) {
4224                 $type = $matches[1];
4225                 $key  = $matches[2];
4226                 if( $type == 'LINK' ) {
4227                         if( isset( $this->mLinkHolders['texts'][$key] ) ) {
4228                                 return $this->mLinkHolders['texts'][$key];
4229                         }
4230                 } elseif( $type == 'IWLINK' ) {
4231                         if( isset( $this->mInterwikiLinkHolders['texts'][$key] ) ) {
4232                                 return $this->mInterwikiLinkHolders['texts'][$key];
4233                         }
4234                 }
4235                 return $matches[0];
4236         }
4237
4238         /**
4239          * Tag hook handler for 'pre'.
4240          */
4241         function renderPreTag( $text, $attribs ) {
4242                 // Backwards-compatibility hack
4243                 $content = StringUtils::delimiterReplace( '<nowiki>', '</nowiki>', '$1', $text, 'i' );
4244
4245                 $attribs = Sanitizer::validateTagAttributes( $attribs, 'pre' );
4246                 return wfOpenElement( 'pre', $attribs ) .
4247                         Xml::escapeTagsOnly( $content ) .
4248                         '</pre>';
4249         }
4250
4251         /**
4252          * Renders an image gallery from a text with one line per image.
4253          * text labels may be given by using |-style alternative text. E.g.
4254          *   Image:one.jpg|The number "1"
4255          *   Image:tree.jpg|A tree
4256          * given as text will return the HTML of a gallery with two images,
4257          * labeled 'The number "1"' and
4258          * 'A tree'.
4259          */
4260         function renderImageGallery( $text, $params ) {
4261                 $ig = new ImageGallery();
4262                 $ig->setContextTitle( $this->mTitle );
4263                 $ig->setShowBytes( false );
4264                 $ig->setShowFilename( false );
4265                 $ig->setParser( $this );
4266                 $ig->setHideBadImages();
4267                 $ig->setAttributes( Sanitizer::validateTagAttributes( $params, 'table' ) );
4268                 $ig->useSkin( $this->mOptions->getSkin() );
4269                 $ig->mRevisionId = $this->mRevisionId;
4270
4271                 if( isset( $params['caption'] ) ) {
4272                         $caption = $params['caption'];
4273                         $caption = htmlspecialchars( $caption );
4274                         $caption = $this->replaceInternalLinks( $caption );
4275                         $ig->setCaptionHtml( $caption );
4276                 }
4277                 if( isset( $params['perrow'] ) ) {
4278                         $ig->setPerRow( $params['perrow'] );
4279                 }
4280                 if( isset( $params['widths'] ) ) {
4281                         $ig->setWidths( $params['widths'] );
4282                 }
4283                 if( isset( $params['heights'] ) ) {
4284                         $ig->setHeights( $params['heights'] );
4285                 }
4286
4287                 wfRunHooks( 'BeforeParserrenderImageGallery', array( &$this, &$ig ) );
4288
4289                 $lines = explode( "\n", $text );
4290                 foreach ( $lines as $line ) {
4291                         # match lines like these:
4292                         # Image:someimage.jpg|This is some image
4293                         $matches = array();
4294                         preg_match( "/^([^|]+)(\\|(.*))?$/", $line, $matches );
4295                         # Skip empty lines
4296                         if ( count( $matches ) == 0 ) {
4297                                 continue;
4298                         }
4299                         $tp = Title::newFromText( $matches[1] );
4300                         $nt =& $tp;
4301                         if( is_null( $nt ) ) {
4302                                 # Bogus title. Ignore these so we don't bomb out later.
4303                                 continue;
4304                         }
4305                         if ( isset( $matches[3] ) ) {
4306                                 $label = $matches[3];
4307                         } else {
4308                                 $label = '';
4309                         }
4310
4311                         $html = $this->recursiveTagParse( trim( $label ) );
4312
4313                         $ig->add( $nt, $html );
4314
4315                         # Only add real images (bug #5586)
4316                         if ( $nt->getNamespace() == NS_IMAGE ) {
4317                                 $this->mOutput->addImage( $nt->getDBkey() );
4318                         }
4319                 }
4320                 return $ig->toHTML();
4321         }
4322
4323         function getImageParams( $handler ) {
4324                 if ( $handler ) {
4325                         $handlerClass = get_class( $handler );
4326                 } else {
4327                         $handlerClass = '';
4328                 }
4329                 if ( !isset( $this->mImageParams[$handlerClass]  ) ) {
4330                         // Initialise static lists
4331                         static $internalParamNames = array(
4332                                 'horizAlign' => array( 'left', 'right', 'center', 'none' ),
4333                                 'vertAlign' => array( 'baseline', 'sub', 'super', 'top', 'text-top', 'middle',
4334                                         'bottom', 'text-bottom' ),
4335                                 'frame' => array( 'thumbnail', 'manualthumb', 'framed', 'frameless',
4336                                         'upright', 'border' ),
4337                         );
4338                         static $internalParamMap;
4339                         if ( !$internalParamMap ) {
4340                                 $internalParamMap = array();
4341                                 foreach ( $internalParamNames as $type => $names ) {
4342                                         foreach ( $names as $name ) {
4343                                                 $magicName = str_replace( '-', '_', "img_$name" );
4344                                                 $internalParamMap[$magicName] = array( $type, $name );
4345                                         }
4346                                 }
4347                         }
4348
4349                         // Add handler params
4350                         $paramMap = $internalParamMap;
4351                         if ( $handler ) {
4352                                 $handlerParamMap = $handler->getParamMap();
4353                                 foreach ( $handlerParamMap as $magic => $paramName ) {
4354                                         $paramMap[$magic] = array( 'handler', $paramName );
4355                                 }
4356                         }
4357                         $this->mImageParams[$handlerClass] = $paramMap;
4358                         $this->mImageParamsMagicArray[$handlerClass] = new MagicWordArray( array_keys( $paramMap ) );
4359                 }
4360                 return array( $this->mImageParams[$handlerClass], $this->mImageParamsMagicArray[$handlerClass] );
4361         }
4362
4363         /**
4364          * Parse image options text and use it to make an image
4365          */
4366         function makeImage( $title, $options ) {
4367                 # @TODO: let the MediaHandler specify its transform parameters
4368                 #
4369                 # Check if the options text is of the form "options|alt text"
4370                 # Options are:
4371                 #  * thumbnail          make a thumbnail with enlarge-icon and caption, alignment depends on lang
4372                 #  * left               no resizing, just left align. label is used for alt= only
4373                 #  * right              same, but right aligned
4374                 #  * none               same, but not aligned
4375                 #  * ___px              scale to ___ pixels width, no aligning. e.g. use in taxobox
4376                 #  * center             center the image
4377                 #  * framed             Keep original image size, no magnify-button.
4378                 #  * frameless          like 'thumb' but without a frame. Keeps user preferences for width
4379                 #  * upright            reduce width for upright images, rounded to full __0 px
4380                 #  * border             draw a 1px border around the image
4381                 # vertical-align values (no % or length right now):
4382                 #  * baseline
4383                 #  * sub
4384                 #  * super
4385                 #  * top
4386                 #  * text-top
4387                 #  * middle
4388                 #  * bottom
4389                 #  * text-bottom
4390
4391                 $parts = array_map( 'trim', explode( '|', $options) );
4392                 $sk = $this->mOptions->getSkin();
4393
4394                 # Give extensions a chance to select the file revision for us
4395                 $skip = $time = false;
4396                 wfRunHooks( 'BeforeParserMakeImageLinkObj', array( &$this, &$title, &$skip, &$time ) );
4397
4398                 if ( $skip ) {
4399                         return $sk->makeLinkObj( $title );
4400                 }
4401
4402                 # Get parameter map
4403                 $file = wfFindFile( $title, $time );
4404                 $handler = $file ? $file->getHandler() : false;
4405
4406                 list( $paramMap, $mwArray ) = $this->getImageParams( $handler );
4407
4408                 # Process the input parameters
4409                 $caption = '';
4410                 $params = array( 'frame' => array(), 'handler' => array(),
4411                         'horizAlign' => array(), 'vertAlign' => array() );
4412                 foreach( $parts as $part ) {
4413                         list( $magicName, $value ) = $mwArray->matchVariableStartToEnd( $part );
4414                         if ( isset( $paramMap[$magicName] ) ) {
4415                                 list( $type, $paramName ) = $paramMap[$magicName];
4416                                 $params[$type][$paramName] = $value;
4417
4418                                 // Special case; width and height come in one variable together
4419                                 if( $type == 'handler' && $paramName == 'width' ) {
4420                                         $m = array();
4421                                         if ( preg_match( '/^([0-9]*)x([0-9]*)$/', $value, $m ) ) {
4422                                                 $params[$type]['width'] = intval( $m[1] );
4423                                                 $params[$type]['height'] = intval( $m[2] );
4424                                         } else {
4425                                                 $params[$type]['width'] = intval( $value );
4426                                         }
4427                                 }
4428                         } else {
4429                                 $caption = $part;
4430                         }
4431                 }
4432
4433                 # Process alignment parameters
4434                 if ( $params['horizAlign'] ) {
4435                         $params['frame']['align'] = key( $params['horizAlign'] );
4436                 }
4437                 if ( $params['vertAlign'] ) {
4438                         $params['frame']['valign'] = key( $params['vertAlign'] );
4439                 }
4440
4441                 # Validate the handler parameters
4442                 if ( $handler ) {
4443                         foreach ( $params['handler'] as $name => $value ) {
4444                                 if ( !$handler->validateParam( $name, $value ) ) {
4445                                         unset( $params['handler'][$name] );
4446                                 }
4447                         }
4448                 }
4449
4450                 # Strip bad stuff out of the alt text
4451                 $alt = $this->replaceLinkHoldersText( $caption );
4452
4453                 # make sure there are no placeholders in thumbnail attributes
4454                 # that are later expanded to html- so expand them now and
4455                 # remove the tags
4456                 $alt = $this->mStripState->unstripBoth( $alt );
4457                 $alt = Sanitizer::stripAllTags( $alt );
4458
4459                 $params['frame']['alt'] = $alt;
4460                 $params['frame']['caption'] = $caption;
4461
4462                 # Linker does the rest
4463                 $ret = $sk->makeImageLink2( $title, $file, $params['frame'], $params['handler'] );
4464
4465                 # Give the handler a chance to modify the parser object
4466                 if ( $handler ) {
4467                         $handler->parserTransformHook( $this, $file );
4468                 }
4469
4470                 return $ret;
4471         }
4472
4473         /**
4474          * Set a flag in the output object indicating that the content is dynamic and
4475          * shouldn't be cached.
4476          */
4477         function disableCache() {
4478                 wfDebug( "Parser output marked as uncacheable.\n" );
4479                 $this->mOutput->mCacheTime = -1;
4480         }
4481
4482         /**#@+
4483          * Callback from the Sanitizer for expanding items found in HTML attribute
4484          * values, so they can be safely tested and escaped.
4485          * @param string $text
4486          * @param PPFrame $frame
4487          * @return string
4488          * @private
4489          */
4490         function attributeStripCallback( &$text, $frame = false ) {
4491                 $text = $this->replaceVariables( $text, $frame );
4492                 $text = $this->mStripState->unstripBoth( $text );
4493                 return $text;
4494         }
4495
4496         /**#@-*/
4497
4498         /**#@+
4499          * Accessor/mutator
4500          */
4501         function Title( $x = NULL ) { return wfSetVar( $this->mTitle, $x ); }
4502         function Options( $x = NULL ) { return wfSetVar( $this->mOptions, $x ); }
4503         function OutputType( $x = NULL ) { return wfSetVar( $this->mOutputType, $x ); }
4504         /**#@-*/
4505
4506         /**#@+
4507          * Accessor
4508          */
4509         function getTags() { return array_merge( array_keys($this->mTransparentTagHooks), array_keys( $this->mTagHooks ) ); }
4510         /**#@-*/
4511
4512
4513         /**
4514          * Break wikitext input into sections, and either pull or replace
4515          * some particular section's text.
4516          *
4517          * External callers should use the getSection and replaceSection methods.
4518          *
4519          * @param string $text Page wikitext
4520          * @param string $section A section identifier string of the form:
4521          *   <flag1> - <flag2> - ... - <section number>
4522          *
4523          * Currently the only recognised flag is "T", which means the target section number
4524          * was derived during a template inclusion parse, in other words this is a template
4525          * section edit link. If no flags are given, it was an ordinary section edit link.
4526          * This flag is required to avoid a section numbering mismatch when a section is
4527          * enclosed by <includeonly> (bug 6563).
4528          *
4529          * The section number 0 pulls the text before the first heading; other numbers will
4530          * pull the given section along with its lower-level subsections. If the section is
4531          * not found, $mode=get will return $newtext, and $mode=replace will return $text.
4532          *
4533          * @param string $mode One of "get" or "replace"
4534          * @param string $newText Replacement text for section data.
4535          * @return string for "get", the extracted section text.
4536          *                for "replace", the whole page with the section replaced.
4537          */
4538         private function extractSections( $text, $section, $mode, $newText='' ) {
4539                 global $wgTitle;
4540                 $this->clearState();
4541                 $this->setTitle( $wgTitle ); // not generally used but removes an ugly failure mode
4542                 $this->mOptions = new ParserOptions;
4543                 $this->setOutputType( OT_WIKI );
4544                 $curIndex = 0;
4545                 $outText = '';
4546                 $frame = $this->getPreprocessor()->newFrame();
4547
4548                 // Process section extraction flags
4549                 $flags = 0;
4550                 $sectionParts = explode( '-', $section );
4551                 $sectionIndex = array_pop( $sectionParts );
4552                 foreach ( $sectionParts as $part ) {
4553                         if ( $part == 'T' ) {
4554                                 $flags |= self::PTD_FOR_INCLUSION;
4555                         }
4556                 }
4557                 // Preprocess the text
4558                 $root = $this->preprocessToDom( $text, $flags );
4559
4560                 // <h> nodes indicate section breaks
4561                 // They can only occur at the top level, so we can find them by iterating the root's children
4562                 $node = $root->getFirstChild();
4563
4564                 // Find the target section
4565                 if ( $sectionIndex == 0 ) {
4566                         // Section zero doesn't nest, level=big
4567                         $targetLevel = 1000;
4568                 } else {
4569                         while ( $node ) {
4570                                 if ( $node->getName() == 'h' ) {
4571                                         if ( $curIndex + 1 == $sectionIndex ) {
4572                                                 break;
4573                                         }
4574                                         $curIndex++;
4575                                 }
4576                                 if ( $mode == 'replace' ) {
4577                                         $outText .= $frame->expand( $node, PPFrame::RECOVER_ORIG );
4578                                 }
4579                                 $node = $node->getNextSibling();
4580                         }
4581                         if ( $node ) {
4582                                 $bits = $node->splitHeading();
4583                                 $targetLevel = $bits['level'];
4584                         }
4585                 }
4586
4587                 if ( !$node ) {
4588                         // Not found
4589                         if ( $mode == 'get' ) {
4590                                 return $newText;
4591                         } else {
4592                                 return $text;
4593                         }
4594                 }
4595
4596                 // Find the end of the section, including nested sections
4597                 do {
4598                         if ( $node->getName() == 'h' ) {
4599                                 $curIndex++;
4600                                 $bits = $node->splitHeading();
4601                                 $curLevel = $bits['level'];
4602                                 if ( $curIndex != $sectionIndex && $curLevel <= $targetLevel ) {
4603                                         break;
4604                                 }
4605                         }
4606                         if ( $mode == 'get' ) {
4607                                 $outText .= $frame->expand( $node, PPFrame::RECOVER_ORIG );
4608                         }
4609                         $node = $node->getNextSibling();
4610                 } while ( $node );
4611
4612                 // Write out the remainder (in replace mode only)
4613                 if ( $mode == 'replace' ) {
4614                         // Output the replacement text
4615                         // Add two newlines on -- trailing whitespace in $newText is conventionally
4616                         // stripped by the editor, so we need both newlines to restore the paragraph gap
4617                         $outText .= $newText . "\n\n";
4618                         while ( $node ) {
4619                                 $outText .= $frame->expand( $node, PPFrame::RECOVER_ORIG );
4620                                 $node = $node->getNextSibling();
4621                         }
4622                 }
4623
4624                 if ( is_string( $outText ) ) {
4625                         // Re-insert stripped tags
4626                         $outText = trim( $this->mStripState->unstripBoth( $outText ) );
4627                 }
4628
4629                 return $outText;
4630         }
4631
4632         /**
4633          * This function returns the text of a section, specified by a number ($section).
4634          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
4635          * the first section before any such heading (section 0).
4636          *
4637          * If a section contains subsections, these are also returned.
4638          *
4639          * @param string $text text to look in
4640          * @param string $section section identifier
4641          * @param string $deftext default to return if section is not found
4642          * @return string text of the requested section
4643          */
4644         public function getSection( $text, $section, $deftext='' ) {
4645                 return $this->extractSections( $text, $section, "get", $deftext );
4646         }
4647
4648         public function replaceSection( $oldtext, $section, $text ) {
4649                 return $this->extractSections( $oldtext, $section, "replace", $text );
4650         }
4651
4652         /**
4653          * Get the timestamp associated with the current revision, adjusted for
4654          * the default server-local timestamp
4655          */
4656         function getRevisionTimestamp() {
4657                 if ( is_null( $this->mRevisionTimestamp ) ) {
4658                         wfProfileIn( __METHOD__ );
4659                         global $wgContLang;
4660                         $dbr = wfGetDB( DB_SLAVE );
4661                         $timestamp = $dbr->selectField( 'revision', 'rev_timestamp',
4662                                         array( 'rev_id' => $this->mRevisionId ), __METHOD__ );
4663
4664                         // Normalize timestamp to internal MW format for timezone processing.
4665                         // This has the added side-effect of replacing a null value with
4666                         // the current time, which gives us more sensible behavior for
4667                         // previews.
4668                         $timestamp = wfTimestamp( TS_MW, $timestamp );
4669
4670                         // The cryptic '' timezone parameter tells to use the site-default
4671                         // timezone offset instead of the user settings.
4672                         //
4673                         // Since this value will be saved into the parser cache, served
4674                         // to other users, and potentially even used inside links and such,
4675                         // it needs to be consistent for all visitors.
4676                         $this->mRevisionTimestamp = $wgContLang->userAdjust( $timestamp, '' );
4677
4678                         wfProfileOut( __METHOD__ );
4679                 }
4680                 return $this->mRevisionTimestamp;
4681         }
4682
4683         /**
4684          * Mutator for $mDefaultSort
4685          *
4686          * @param $sort New value
4687          */
4688         public function setDefaultSort( $sort ) {
4689                 $this->mDefaultSort = $sort;
4690         }
4691
4692         /**
4693          * Accessor for $mDefaultSort
4694          * Will use the title/prefixed title if none is set
4695          *
4696          * @return string
4697          */
4698         public function getDefaultSort() {
4699                 if( $this->mDefaultSort !== false ) {
4700                         return $this->mDefaultSort;
4701                 } else {
4702                         return $this->mTitle->getNamespace() == NS_CATEGORY
4703                                         ? $this->mTitle->getText()
4704                                         : $this->mTitle->getPrefixedText();
4705                 }
4706         }
4707
4708         /**
4709          * Try to guess the section anchor name based on a wikitext fragment
4710          * presumably extracted from a heading, for example "Header" from
4711          * "== Header ==".
4712          */
4713         public function guessSectionNameFromWikiText( $text ) {
4714                 # Strip out wikitext links(they break the anchor)
4715                 $text = $this->stripSectionName( $text );
4716                 $headline = Sanitizer::decodeCharReferences( $text );
4717                 # strip out HTML
4718                 $headline = StringUtils::delimiterReplace( '<', '>', '', $headline );
4719                 $headline = trim( $headline );
4720                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
4721                 $replacearray = array(
4722                         '%3A' => ':',
4723                         '%' => '.'
4724                 );
4725                 return str_replace(
4726                         array_keys( $replacearray ),
4727                         array_values( $replacearray ),
4728                         $sectionanchor );
4729         }
4730
4731         /**
4732          * Strips a text string of wikitext for use in a section anchor
4733          *
4734          * Accepts a text string and then removes all wikitext from the
4735          * string and leaves only the resultant text (i.e. the result of
4736          * [[User:WikiSysop|Sysop]] would be "Sysop" and the result of
4737          * [[User:WikiSysop]] would be "User:WikiSysop") - this is intended
4738          * to create valid section anchors by mimicing the output of the
4739          * parser when headings are parsed.
4740          *
4741          * @param $text string Text string to be stripped of wikitext
4742          * for use in a Section anchor
4743          * @return Filtered text string
4744          */
4745         public function stripSectionName( $text ) {
4746                 # Strip internal link markup
4747                 $text = preg_replace('/\[\[:?([^[|]+)\|([^[]+)\]\]/','$2',$text);
4748                 $text = preg_replace('/\[\[:?([^[]+)\|?\]\]/','$1',$text);
4749
4750                 # Strip external link markup (FIXME: Not Tolerant to blank link text
4751                 # I.E. [http://www.mediawiki.org] will render as [1] or something depending
4752                 # on how many empty links there are on the page - need to figure that out.
4753                 $text = preg_replace('/\[(?:' . wfUrlProtocols() . ')([^ ]+?) ([^[]+)\]/','$2',$text);
4754
4755                 # Parse wikitext quotes (italics & bold)
4756                 $text = $this->doQuotes($text);
4757
4758                 # Strip HTML tags
4759                 $text = StringUtils::delimiterReplace( '<', '>', '', $text );
4760                 return $text;
4761         }
4762
4763         function srvus( $text ) {
4764                 return $this->testSrvus( $text, $this->mOutputType );
4765         }
4766
4767         /**
4768          * strip/replaceVariables/unstrip for preprocessor regression testing
4769          */
4770         function testSrvus( $text, $title, $options, $outputType = OT_HTML ) {
4771                 $this->clearState();
4772                 $this->mTitle = $title;
4773                 $this->mOptions = $options;
4774                 $this->setOutputType( $outputType );
4775                 $text = $this->replaceVariables( $text );
4776                 $text = $this->mStripState->unstripBoth( $text );
4777                 $text = Sanitizer::removeHTMLtags( $text );
4778                 return $text;
4779         }
4780
4781         function testPst( $text, $title, $options ) {
4782                 global $wgUser;
4783                 return $this->preSaveTransform( $text, $title, $wgUser, $options );
4784         }
4785
4786         function testPreprocess( $text, $title, $options ) {
4787                 return $this->testSrvus( $text, $title, $options, OT_PREPROCESS );
4788         }
4789 }
4790
4791 /**
4792  * @todo document, briefly.
4793  * @addtogroup Parser
4794  */
4795 class StripState {
4796         var $general, $nowiki;
4797
4798         function __construct() {
4799                 $this->general = new ReplacementArray;
4800                 $this->nowiki = new ReplacementArray;
4801         }
4802
4803         function unstripGeneral( $text ) {
4804                 wfProfileIn( __METHOD__ );
4805                 do {
4806                         $oldText = $text;
4807                         $text = $this->general->replace( $text );
4808                 } while ( $text != $oldText );
4809                 wfProfileOut( __METHOD__ );
4810                 return $text;
4811         }
4812
4813         function unstripNoWiki( $text ) {
4814                 wfProfileIn( __METHOD__ );
4815                 do {
4816                         $oldText = $text;
4817                         $text = $this->nowiki->replace( $text );
4818                 } while ( $text != $oldText );
4819                 wfProfileOut( __METHOD__ );
4820                 return $text;
4821         }
4822
4823         function unstripBoth( $text ) {
4824                 wfProfileIn( __METHOD__ );
4825                 do {
4826                         $oldText = $text;
4827                         $text = $this->general->replace( $text );
4828                         $text = $this->nowiki->replace( $text );
4829                 } while ( $text != $oldText );
4830                 wfProfileOut( __METHOD__ );
4831                 return $text;
4832         }
4833 }
4834
4835 /**
4836  * @todo document, briefly.
4837  * @addtogroup Parser
4838  */
4839 class OnlyIncludeReplacer {
4840         var $output = '';
4841
4842         function replace( $matches ) {
4843                 if ( substr( $matches[1], -1 ) == "\n" ) {
4844                         $this->output .= substr( $matches[1], 0, -1 );
4845                 } else {
4846                         $this->output .= $matches[1];
4847                 }
4848         }
4849 }
4850