includes/Parser.php

   1 <?php
   2 /**
   3  * File for Parser and related classes
   4  *
   5  * @package MediaWiki
   6  * @subpackage Parser
   7  */
   8
   9 /**
  10  * Update this version number when the ParserOutput format
  11  * changes in an incompatible way, so the parser cache
  12  * can automatically discard old data.
  13  */
  14 define( 'MW_PARSER_VERSION', '1.6.1' );
  15
  16 define( 'RLH_FOR_UPDATE', 1 );
  17
  18 # Allowed values for $mOutputType
  19 define( 'OT_HTML', 1 );
  20 define( 'OT_WIKI', 2 );
  21 define( 'OT_MSG' , 3 );
  22 define( 'OT_PREPROCESS', 4 );
  23
  24 # Flags for setFunctionHook
  25 define( 'SFH_NO_HASH', 1 );
  26
  27 # string parameter for extractTags which will cause it
  28 # to strip HTML comments in addition to regular
  29 # <XML>-style tags. This should not be anything we
  30 # may want to use in wikisyntax
  31 define( 'STRIP_COMMENTS', 'HTMLCommentStrip' );
  32
  33 # Constants needed for external link processing
  34 define( 'HTTP_PROTOCOLS', 'http:\/\/|https:\/\/' );
  35 # Everything except bracket, space, or control characters
  36 define( 'EXT_LINK_URL_CLASS', '[^][<>"\\x00-\\x20\\x7F]' );
  37 # Including space, but excluding newlines
  38 define( 'EXT_LINK_TEXT_CLASS', '[^\]\\x0a\\x0d]' );
  39 define( 'EXT_IMAGE_FNAME_CLASS', '[A-Za-z0-9_.,~%\\-+&;#*?!=()@\\x80-\\xFF]' );
  40 define( 'EXT_IMAGE_EXTENSIONS', 'gif|png|jpg|jpeg' );
  41 define( 'EXT_LINK_BRACKETED',  '/\[(\b(' . wfUrlProtocols() . ')'.
  42         EXT_LINK_URL_CLASS.'+) *('.EXT_LINK_TEXT_CLASS.'*?)\]/S' );
  43 define( 'EXT_IMAGE_REGEX',
  44         '/^('.HTTP_PROTOCOLS.')'.  # Protocol
  45         '('.EXT_LINK_URL_CLASS.'+)\\/'.  # Hostname and path
  46         '('.EXT_IMAGE_FNAME_CLASS.'+)\\.((?i)'.EXT_IMAGE_EXTENSIONS.')$/S' # Filename
  47 );
  48
  49 // State constants for the definition list colon extraction
  50 define( 'MW_COLON_STATE_TEXT', 0 );
  51 define( 'MW_COLON_STATE_TAG', 1 );
  52 define( 'MW_COLON_STATE_TAGSTART', 2 );
  53 define( 'MW_COLON_STATE_CLOSETAG', 3 );
  54 define( 'MW_COLON_STATE_TAGSLASH', 4 );
  55 define( 'MW_COLON_STATE_COMMENT', 5 );
  56 define( 'MW_COLON_STATE_COMMENTDASH', 6 );
  57 define( 'MW_COLON_STATE_COMMENTDASHDASH', 7 );
  58
  59 /**
  60  * PHP Parser
  61  *
  62  * Processes wiki markup
  63  *
  64  * <pre>
  65  * There are three main entry points into the Parser class:
  66  * parse()
  67  *   produces HTML output
  68  * preSaveTransform().
  69  *   produces altered wiki markup.
  70  * transformMsg()
  71  *   performs brace substitution on MediaWiki messages
  72  *
  73  * Globals used:
  74  *    objects:   $wgLang, $wgContLang
  75  *
  76  * NOT $wgArticle, $wgUser or $wgTitle. Keep them away!
  77  *
  78  * settings:
  79  *  $wgUseTex*, $wgUseDynamicDates*, $wgInterwikiMagic*,
  80  *  $wgNamespacesWithSubpages, $wgAllowExternalImages*,
  81  *  $wgLocaltimezone, $wgAllowSpecialInclusion*,
  82  *  $wgMaxArticleSize*
  83  *
  84  *  * only within ParserOptions
  85  * </pre>
  86  *
  87  * @package MediaWiki
  88  */
  89 class Parser
  90 {
  91         /**#@+
  92          * @private
  93          */
  94         # Persistent:
  95         var $mTagHooks, $mFunctionHooks, $mFunctionSynonyms, $mVariables;
  96
  97         # Cleared with clearState():
  98         var $mOutput, $mAutonumber, $mDTopen, $mStripState = array();
  99         var $mIncludeCount, $mArgStack, $mLastSection, $mInPre;
 100         var $mInterwikiLinkHolders, $mLinkHolders, $mUniqPrefix;
 101         var $mIncludeSizes;
 102         var $mTemplates,        // cache of already loaded templates, avoids
 103                                 // multiple SQL queries for the same string
 104             $mTemplatePath;     // stores an unsorted hash of all the templates already loaded
 105                                 // in this path. Used for loop detection.
 106
 107         # Temporary
 108         # These are variables reset at least once per parse regardless of $clearState
 109         var $mOptions,      // ParserOptions object
 110                 $mTitle,        // Title context, used for self-link rendering and similar things
 111                 $mOutputType,   // Output type, one of the OT_xxx constants
 112                 $ot,            // Shortcut alias, see setOutputType()
 113                 $mRevisionId;   // ID to display in {{REVISIONID}} tags
 114
 115         /**#@-*/
 116
 117         /**
 118          * Constructor
 119          *
 120          * @public
 121          */
 122         function Parser() {
 123                 $this->mTagHooks = array();
 124                 $this->mFunctionHooks = array();
 125                 $this->mFunctionSynonyms = array( 0 => array(), 1 => array() );
 126                 $this->mFirstCall = true;
 127         }
 128
 129         /**
 130          * Do various kinds of initialisation on the first call of the parser
 131          */
 132         function firstCallInit() {
 133                 if ( !$this->mFirstCall ) {
 134                         return;
 135                 }
 136
 137                 wfProfileIn( __METHOD__ );
 138                 global $wgAllowDisplayTitle, $wgAllowSlowParserFunctions;
 139
 140                 $this->setHook( 'pre', array( $this, 'renderPreTag' ) );
 141
 142                 $this->setFunctionHook( 'int', array( 'CoreParserFunctions', 'intFunction' ), SFH_NO_HASH );
 143                 $this->setFunctionHook( 'ns', array( 'CoreParserFunctions', 'ns' ), SFH_NO_HASH );
 144                 $this->setFunctionHook( 'urlencode', array( 'CoreParserFunctions', 'urlencode' ), SFH_NO_HASH );
 145                 $this->setFunctionHook( 'lcfirst', array( 'CoreParserFunctions', 'lcfirst' ), SFH_NO_HASH );
 146                 $this->setFunctionHook( 'ucfirst', array( 'CoreParserFunctions', 'ucfirst' ), SFH_NO_HASH );
 147                 $this->setFunctionHook( 'lc', array( 'CoreParserFunctions', 'lc' ), SFH_NO_HASH );
 148                 $this->setFunctionHook( 'uc', array( 'CoreParserFunctions', 'uc' ), SFH_NO_HASH );
 149                 $this->setFunctionHook( 'localurl', array( 'CoreParserFunctions', 'localurl' ), SFH_NO_HASH );
 150                 $this->setFunctionHook( 'localurle', array( 'CoreParserFunctions', 'localurle' ), SFH_NO_HASH );
 151                 $this->setFunctionHook( 'fullurl', array( 'CoreParserFunctions', 'fullurl' ), SFH_NO_HASH );
 152                 $this->setFunctionHook( 'fullurle', array( 'CoreParserFunctions', 'fullurle' ), SFH_NO_HASH );
 153                 $this->setFunctionHook( 'formatnum', array( 'CoreParserFunctions', 'formatnum' ), SFH_NO_HASH );
 154                 $this->setFunctionHook( 'grammar', array( 'CoreParserFunctions', 'grammar' ), SFH_NO_HASH );
 155                 $this->setFunctionHook( 'plural', array( 'CoreParserFunctions', 'plural' ), SFH_NO_HASH );
 156                 $this->setFunctionHook( 'numberofpages', array( 'CoreParserFunctions', 'numberofpages' ), SFH_NO_HASH );
 157                 $this->setFunctionHook( 'numberofusers', array( 'CoreParserFunctions', 'numberofusers' ), SFH_NO_HASH );
 158                 $this->setFunctionHook( 'numberofarticles', array( 'CoreParserFunctions', 'numberofarticles' ), SFH_NO_HASH );
 159                 $this->setFunctionHook( 'numberoffiles', array( 'CoreParserFunctions', 'numberoffiles' ), SFH_NO_HASH );
 160                 $this->setFunctionHook( 'numberofadmins', array( 'CoreParserFunctions', 'numberofadmins' ), SFH_NO_HASH );
 161                 $this->setFunctionHook( 'language', array( 'CoreParserFunctions', 'language' ), SFH_NO_HASH );
 162                 $this->setFunctionHook( 'padleft', array( 'CoreParserFunctions', 'padleft' ), SFH_NO_HASH );
 163                 $this->setFunctionHook( 'padright', array( 'CoreParserFunctions', 'padright' ), SFH_NO_HASH );
 164                 $this->setFunctionHook( 'anchorencode', array( 'CoreParserFunctions', 'anchorencode' ), SFH_NO_HASH );
 165
 166                 if ( $wgAllowDisplayTitle ) {
 167                         $this->setFunctionHook( 'displaytitle', array( 'CoreParserFunctions', 'displaytitle' ), SFH_NO_HASH );
 168                 }
 169                 if ( $wgAllowSlowParserFunctions ) {
 170                         $this->setFunctionHook( 'pagesinnamespace', array( 'CoreParserFunctions', 'pagesinnamespace' ), SFH_NO_HASH );
 171                 }
 172
 173                 $this->initialiseVariables();
 174
 175                 $this->mFirstCall = false;
 176                 wfProfileOut( __METHOD__ );
 177         }
 178
 179         /**
 180          * Clear Parser state
 181          *
 182          * @private
 183          */
 184         function clearState() {
 185                 wfProfileIn( __METHOD__ );
 186                 if ( $this->mFirstCall ) {
 187                         $this->firstCallInit();
 188                 }
 189                 $this->mOutput = new ParserOutput;
 190                 $this->mAutonumber = 0;
 191                 $this->mLastSection = '';
 192                 $this->mDTopen = false;
 193                 $this->mIncludeCount = array();
 194                 $this->mStripState = array();
 195                 $this->mArgStack = array();
 196                 $this->mInPre = false;
 197                 $this->mInterwikiLinkHolders = array(
 198                         'texts' => array(),
 199                         'titles' => array()
 200                 );
 201                 $this->mLinkHolders = array(
 202                         'namespaces' => array(),
 203                         'dbkeys' => array(),
 204                         'queries' => array(),
 205                         'texts' => array(),
 206                         'titles' => array()
 207                 );
 208                 $this->mRevisionId = null;
 209
 210                 /**
 211                  * Prefix for temporary replacement strings for the multipass parser.
 212                  * \x07 should never appear in input as it's disallowed in XML.
 213                  * Using it at the front also gives us a little extra robustness
 214                  * since it shouldn't match when butted up against identifier-like
 215                  * string constructs.
 216                  */
 217                 $this->mUniqPrefix = "\x07UNIQ" . Parser::getRandomString();
 218
 219                 # Clear these on every parse, bug 4549
 220                 $this->mTemplates = array();
 221                 $this->mTemplatePath = array();
 222
 223                 $this->mShowToc = true;
 224                 $this->mForceTocPosition = false;
 225                 $this->mIncludeSizes = array(
 226                         'pre-expand' => 0,
 227                         'post-expand' => 0,
 228                         'arg' => 0
 229                 );
 230
 231                 wfRunHooks( 'ParserClearState', array( &$this ) );
 232                 wfProfileOut( __METHOD__ );
 233         }
 234
 235         function setOutputType( $ot ) {
 236                 $this->mOutputType = $ot;
 237                 // Shortcut alias
 238                 $this->ot = array(
 239                         'html' => $ot == OT_HTML,
 240                         'wiki' => $ot == OT_WIKI,
 241                         'msg' => $ot == OT_MSG,
 242                         'pre' => $ot == OT_PREPROCESS,
 243                 );
 244         }
 245
 246         /**
 247          * Accessor for mUniqPrefix.
 248          *
 249          * @public
 250          */
 251         function uniqPrefix() {
 252                 return $this->mUniqPrefix;
 253         }
 254
 255         /**
 256          * Convert wikitext to HTML
 257          * Do not call this function recursively.
 258          *
 259          * @private
 260          * @param string $text Text we want to parse
 261          * @param Title &$title A title object
 262          * @param array $options
 263          * @param boolean $linestart
 264          * @param boolean $clearState
 265          * @param int $revid number to pass in {{REVISIONID}}
 266          * @return ParserOutput a ParserOutput
 267          */
 268         function parse( $text, &$title, $options, $linestart = true, $clearState = true, $revid = null ) {
 269                 /**
 270                  * First pass--just handle <nowiki> sections, pass the rest off
 271                  * to internalParse() which does all the real work.
 272                  */
 273
 274                 global $wgUseTidy, $wgAlwaysUseTidy, $wgContLang;
 275                 $fname = 'Parser::parse-' . wfGetCaller();
 276                 wfProfileIn( $fname );
 277
 278                 if ( $clearState ) {
 279                         $this->clearState();
 280                 }
 281
 282                 $this->mOptions = $options;
 283                 $this->mTitle =& $title;
 284                 $oldRevisionId = $this->mRevisionId;
 285                 if( $revid !== null ) {
 286                         $this->mRevisionId = $revid;
 287                 }
 288                 $this->setOutputType( OT_HTML );
 289
 290                 //$text = $this->strip( $text, $this->mStripState );
 291                 // VOODOO MAGIC FIX! Sometimes the above segfaults in PHP5.
 292                 $x =& $this->mStripState;
 293
 294                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$x ) );
 295                 $text = $this->strip( $text, $x );
 296                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$x ) );
 297
 298                 $text = $this->internalParse( $text );
 299
 300                 $text = $this->unstrip( $text, $this->mStripState );
 301
 302                 # Clean up special characters, only run once, next-to-last before doBlockLevels
 303                 $fixtags = array(
 304                         # french spaces, last one Guillemet-left
 305                         # only if there is something before the space
 306                         '/(.) (?=\\?|:|;|!|\\302\\273)/' => '\\1&nbsp;\\2',
 307                         # french spaces, Guillemet-right
 308                         '/(\\302\\253) /' => '\\1&nbsp;',
 309                 );
 310                 $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 311
 312                 # only once and last
 313                 $text = $this->doBlockLevels( $text, $linestart );
 314
 315                 $this->replaceLinkHolders( $text );
 316
 317                 # the position of the parserConvert() call should not be changed. it
 318                 # assumes that the links are all replaced and the only thing left
 319                 # is the <nowiki> mark.
 320                 # Side-effects: this calls $this->mOutput->setTitleText()
 321                 $text = $wgContLang->parserConvert( $text, $this );
 322
 323                 $text = $this->unstripNoWiki( $text, $this->mStripState );
 324
 325                 wfRunHooks( 'ParserBeforeTidy', array( &$this, &$text ) );
 326
 327                 $text = Sanitizer::normalizeCharReferences( $text );
 328
 329                 if (($wgUseTidy and $this->mOptions->mTidy) or $wgAlwaysUseTidy) {
 330                         $text = Parser::tidy($text);
 331                 } else {
 332                         # attempt to sanitize at least some nesting problems
 333                         # (bug #2702 and quite a few others)
 334                         $tidyregs = array(
 335                                 # ''Something [http://www.cool.com cool''] -->
 336                                 # <i>Something</i><a href="http://www.cool.com"..><i>cool></i></a>
 337                                 '/(<([bi])>)(<([bi])>)?([^<]*)(<\/?a[^<]*>)([^<]*)(<\/\\4>)?(<\/\\2>)/' =>
 338                                 '\\1\\3\\5\\8\\9\\6\\1\\3\\7\\8\\9',
 339                                 # fix up an anchor inside another anchor, only
 340                                 # at least for a single single nested link (bug 3695)
 341                                 '/(<a[^>]+>)([^<]*)(<a[^>]+>[^<]*)<\/a>(.*)<\/a>/' =>
 342                                 '\\1\\2</a>\\3</a>\\1\\4</a>',
 343                                 # fix div inside inline elements- doBlockLevels won't wrap a line which
 344                                 # contains a div, so fix it up here; replace
 345                                 # div with escaped text
 346                                 '/(<([aib]) [^>]+>)([^<]*)(<div([^>]*)>)(.*)(<\/div>)([^<]*)(<\/\\2>)/' =>
 347                                 '\\1\\3&lt;div\\5&gt;\\6&lt;/div&gt;\\8\\9',
 348                                 # remove empty italic or bold tag pairs, some
 349                                 # introduced by rules above
 350                                 '/<([bi])><\/\\1>/' => '',
 351                         );
 352
 353                         $text = preg_replace(
 354                                 array_keys( $tidyregs ),
 355                                 array_values( $tidyregs ),
 356                                 $text );
 357                 }
 358
 359                 wfRunHooks( 'ParserAfterTidy', array( &$this, &$text ) );
 360
 361                 # Information on include size limits, for the benefit of users who try to skirt them
 362                 if ( max( $this->mIncludeSizes ) > 1000 ) {
 363                         $max = $this->mOptions->getMaxIncludeSize();
 364                         $text .= "<!-- \n" .
 365                                 "Pre-expand include size: {$this->mIncludeSizes['pre-expand']} bytes\n" .
 366                                 "Post-expand include size: {$this->mIncludeSizes['post-expand']} bytes\n" .
 367                                 "Template argument size: {$this->mIncludeSizes['arg']} bytes\n" .
 368                                 "Maximum: $max bytes\n" .
 369                                 "-->\n";
 370                 }
 371                 $this->mOutput->setText( $text );
 372                 $this->mRevisionId = $oldRevisionId;
 373                 wfProfileOut( $fname );
 374
 375                 return $this->mOutput;
 376         }
 377
 378         /**
 379          * Recursive parser entry point that can be called from an extension tag
 380          * hook.
 381          */
 382         function recursiveTagParse( $text ) {
 383                 wfProfileIn( __METHOD__ );
 384                 $x =& $this->mStripState;
 385                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$x ) );
 386                 $text = $this->strip( $text, $x );
 387                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$x ) );
 388                 $text = $this->internalParse( $text );
 389                 wfProfileOut( __METHOD__ );
 390                 return $text;
 391         }
 392
 393         /**
 394          * Expand templates and variables in the text, producing valid, static wikitext.
 395          * Also removes comments.
 396          */
 397         function preprocess( $text, $title, $options ) {
 398                 wfProfileIn( __METHOD__ );
 399                 $this->clearState();
 400                 $this->setOutputType( OT_PREPROCESS );
 401                 $this->mOptions = $options;
 402                 $this->mTitle = $title;
 403                 $x =& $this->mStripState;
 404                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$x ) );
 405                 $text = $this->strip( $text, $x );
 406                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$x ) );
 407                 if ( $this->mOptions->getRemoveComments() ) {
 408                         $text = Sanitizer::removeHTMLcomments( $text );
 409                 }
 410                 $text = $this->replaceVariables( $text );
 411                 $text = $this->unstrip( $text, $x );
 412                 $text = $this->unstripNowiki( $text, $x );
 413                 wfProfileOut( __METHOD__ );
 414                 return $text;
 415         }
 416
 417         /**
 418          * Get a random string
 419          *
 420          * @private
 421          * @static
 422          */
 423         function getRandomString() {
 424                 return dechex(mt_rand(0, 0x7fffffff)) . dechex(mt_rand(0, 0x7fffffff));
 425         }
 426
 427         function &getTitle() { return $this->mTitle; }
 428         function getOptions() { return $this->mOptions; }
 429
 430         function getFunctionLang() {
 431                 global $wgLang, $wgContLang;
 432                 return $this->mOptions->getInterfaceMessage() ? $wgLang : $wgContLang;
 433         }
 434
 435         /**
 436          * Replaces all occurrences of HTML-style comments and the given tags
 437          * in the text with a random marker and returns teh next text. The output
 438          * parameter $matches will be an associative array filled with data in
 439          * the form:
 440          *   'UNIQ-xxxxx' => array(
 441          *     'element',
 442          *     'tag content',
 443          *     array( 'param' => 'x' ),
 444          *     '<element param="x">tag content</element>' ) )
 445          *
 446          * @param $elements list of element names. Comments are always extracted.
 447          * @param $text Source text string.
 448          * @param $uniq_prefix
 449          *
 450          * @private
 451          * @static
 452          */
 453         function extractTagsAndParams($elements, $text, &$matches, $uniq_prefix = ''){
 454                 static $n = 1;
 455                 $stripped = '';
 456                 $matches = array();
 457
 458                 $taglist = implode( '|', $elements );
 459                 $start = "/<($taglist)(\\s+[^>]*?|\\s*?)(\/?>)|<(!--)/i";
 460
 461                 while ( '' != $text ) {
 462                         $p = preg_split( $start, $text, 2, PREG_SPLIT_DELIM_CAPTURE );
 463                         $stripped .= $p[0];
 464                         if( count( $p ) < 5 ) {
 465                                 break;
 466                         }
 467                         if( count( $p ) > 5 ) {
 468                                 // comment
 469                                 $element    = $p[4];
 470                                 $attributes = '';
 471                                 $close      = '';
 472                                 $inside     = $p[5];
 473                         } else {
 474                                 // tag
 475                                 $element    = $p[1];
 476                                 $attributes = $p[2];
 477                                 $close      = $p[3];
 478                                 $inside     = $p[4];
 479                         }
 480
 481                         $marker = "$uniq_prefix-$element-" . sprintf('%08X', $n++) . '-QINU';
 482                         $stripped .= $marker;
 483
 484                         if ( $close === '/>' ) {
 485                                 // Empty element tag, <tag />
 486                                 $content = null;
 487                                 $text = $inside;
 488                                 $tail = null;
 489                         } else {
 490                                 if( $element == '!--' ) {
 491                                         $end = '/(-->)/';
 492                                 } else {
 493                                         $end = "/(<\\/$element\\s*>)/i";
 494                                 }
 495                                 $q = preg_split( $end, $inside, 2, PREG_SPLIT_DELIM_CAPTURE );
 496                                 $content = $q[0];
 497                                 if( count( $q ) < 3 ) {
 498                                         # No end tag -- let it run out to the end of the text.
 499                                         $tail = '';
 500                                         $text = '';
 501                                 } else {
 502                                         $tail = $q[1];
 503                                         $text = $q[2];
 504                                 }
 505                         }
 506
 507                         $matches[$marker] = array( $element,
 508                                 $content,
 509                                 Sanitizer::decodeTagAttributes( $attributes ),
 510                                 "<$element$attributes$close$content$tail" );
 511                 }
 512                 return $stripped;
 513         }
 514
 515         /**
 516          * Strips and renders nowiki, pre, math, hiero
 517          * If $render is set, performs necessary rendering operations on plugins
 518          * Returns the text, and fills an array with data needed in unstrip()
 519          * If the $state is already a valid strip state, it adds to the state
 520          *
 521          * @param bool $stripcomments when set, HTML comments <!-- like this -->
 522          *  will be stripped in addition to other tags. This is important
 523          *  for section editing, where these comments cause confusion when
 524          *  counting the sections in the wikisource
 525          *
 526          * @param array dontstrip contains tags which should not be stripped;
 527          *  used to prevent stipping of <gallery> when saving (fixes bug 2700)
 528          *
 529          * @private
 530          */
 531         function strip( $text, &$state, $stripcomments = false , $dontstrip = array () ) {
 532                 wfProfileIn( __METHOD__ );
 533                 $render = ($this->mOutputType == OT_HTML);
 534
 535                 $uniq_prefix = $this->mUniqPrefix;
 536                 $commentState = array();
 537
 538                 $elements = array_merge(
 539                         array( 'nowiki', 'gallery' ),
 540                         array_keys( $this->mTagHooks ) );
 541                 global $wgRawHtml;
 542                 if( $wgRawHtml ) {
 543                         $elements[] = 'html';
 544                 }
 545                 if( $this->mOptions->getUseTeX() ) {
 546                         $elements[] = 'math';
 547                 }
 548
 549                 # Removing $dontstrip tags from $elements list (currently only 'gallery', fixing bug 2700)
 550                 foreach ( $elements AS $k => $v ) {
 551                         if ( !in_array ( $v , $dontstrip ) ) continue;
 552                         unset ( $elements[$k] );
 553                 }
 554
 555                 $matches = array();
 556                 $text = Parser::extractTagsAndParams( $elements, $text, $matches, $uniq_prefix );
 557
 558                 foreach( $matches as $marker => $data ) {
 559                         list( $element, $content, $params, $tag ) = $data;
 560                         if( $render ) {
 561                                 $tagName = strtolower( $element );
 562                                 wfProfileIn( __METHOD__."-render-$tagName" );
 563                                 switch( $tagName ) {
 564                                 case '!--':
 565                                         // Comment
 566                                         if( substr( $tag, -3 ) == '-->' ) {
 567                                                 $output = $tag;
 568                                         } else {
 569                                                 // Unclosed comment in input.
 570                                                 // Close it so later stripping can remove it
 571                                                 $output = "$tag-->";
 572                                         }
 573                                         break;
 574                                 case 'html':
 575                                         if( $wgRawHtml ) {
 576                                                 $output = $content;
 577                                                 break;
 578                                         }
 579                                         // Shouldn't happen otherwise. :)
 580                                 case 'nowiki':
 581                                         $output = wfEscapeHTMLTagsOnly( $content );
 582                                         break;
 583                                 case 'math':
 584                                         $output = MathRenderer::renderMath( $content );
 585                                         break;
 586                                 case 'gallery':
 587                                         $output = $this->renderImageGallery( $content, $params );
 588                                         break;
 589                                 default:
 590                                         if( isset( $this->mTagHooks[$tagName] ) ) {
 591                                                 $output = call_user_func_array( $this->mTagHooks[$tagName],
 592                                                         array( $content, $params, $this ) );
 593                                         } else {
 594                                                 throw new MWException( "Invalid call hook $element" );
 595                                         }
 596                                 }
 597                                 wfProfileOut( __METHOD__."-render-$tagName" );
 598                         } else {
 599                                 // Just stripping tags; keep the source
 600                                 $output = $tag;
 601                         }
 602
 603                         // Unstrip the output, because unstrip() is no longer recursive so
 604                         // it won't do it itself
 605                         $output = $this->unstrip( $output, $state );
 606
 607                         if( !$stripcomments && $element == '!--' ) {
 608                                 $commentState[$marker] = $output;
 609                         } elseif ( $element == 'html' || $element == 'nowiki' ) {
 610                                 $state['nowiki'][$marker] = $output;
 611                         } else {
 612                                 $state['general'][$marker] = $output;
 613                         }
 614                 }
 615
 616                 # Unstrip comments unless explicitly told otherwise.
 617                 # (The comments are always stripped prior to this point, so as to
 618                 # not invoke any extension tags / parser hooks contained within
 619                 # a comment.)
 620                 if ( !$stripcomments ) {
 621                         // Put them all back and forget them
 622                         $text = strtr( $text, $commentState );
 623                 }
 624
 625                 wfProfileOut( __METHOD__ );
 626                 return $text;
 627         }
 628
 629         /**
 630          * Restores pre, math, and other extensions removed by strip()
 631          *
 632          * always call unstripNoWiki() after this one
 633          * @private
 634          */
 635         function unstrip( $text, $state ) {
 636                 if ( !isset( $state['general'] ) ) {
 637                         return $text;
 638                 }
 639
 640                 wfProfileIn( __METHOD__ );
 641                 # TODO: good candidate for FSS
 642                 $text = strtr( $text, $state['general'] );
 643                 wfProfileOut( __METHOD__ );
 644                 return $text;
 645         }
 646
 647         /**
 648          * Always call this after unstrip() to preserve the order
 649          *
 650          * @private
 651          */
 652         function unstripNoWiki( $text, $state ) {
 653                 if ( !isset( $state['nowiki'] ) ) {
 654                         return $text;
 655                 }
 656
 657                 wfProfileIn( __METHOD__ );
 658                 # TODO: good candidate for FSS
 659                 $text = strtr( $text, $state['nowiki'] );
 660                 wfProfileOut( __METHOD__ );
 661
 662                 return $text;
 663         }
 664
 665         /**
 666          * Add an item to the strip state
 667          * Returns the unique tag which must be inserted into the stripped text
 668          * The tag will be replaced with the original text in unstrip()
 669          *
 670          * @private
 671          */
 672         function insertStripItem( $text, &$state ) {
 673                 $rnd = $this->mUniqPrefix . '-item' . Parser::getRandomString();
 674                 if ( !$state ) {
 675                         $state = array();
 676                 }
 677                 $state['general'][$rnd] = $text;
 678                 return $rnd;
 679         }
 680
 681         /**
 682          * Interface with html tidy, used if $wgUseTidy = true.
 683          * If tidy isn't able to correct the markup, the original will be
 684          * returned in all its glory with a warning comment appended.
 685          *
 686          * Either the external tidy program or the in-process tidy extension
 687          * will be used depending on availability. Override the default
 688          * $wgTidyInternal setting to disable the internal if it's not working.
 689          *
 690          * @param string $text Hideous HTML input
 691          * @return string Corrected HTML output
 692          * @public
 693          * @static
 694          */
 695         function tidy( $text ) {
 696                 global $wgTidyInternal;
 697                 $wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"'.
 698 ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>'.
 699 '<head><title>test</title></head><body>'.$text.'</body></html>';
 700                 if( $wgTidyInternal ) {
 701                         $correctedtext = Parser::internalTidy( $wrappedtext );
 702                 } else {
 703                         $correctedtext = Parser::externalTidy( $wrappedtext );
 704                 }
 705                 if( is_null( $correctedtext ) ) {
 706                         wfDebug( "Tidy error detected!\n" );
 707                         return $text . "\n<!-- Tidy found serious XHTML errors -->\n";
 708                 }
 709                 return $correctedtext;
 710         }
 711
 712         /**
 713          * Spawn an external HTML tidy process and get corrected markup back from it.
 714          *
 715          * @private
 716          * @static
 717          */
 718         function externalTidy( $text ) {
 719                 global $wgTidyConf, $wgTidyBin, $wgTidyOpts;
 720                 $fname = 'Parser::externalTidy';
 721                 wfProfileIn( $fname );
 722
 723                 $cleansource = '';
 724                 $opts = ' -utf8';
 725
 726                 $descriptorspec = array(
 727                         0 => array('pipe', 'r'),
 728                         1 => array('pipe', 'w'),
 729                         2 => array('file', '/dev/null', 'a')
 730                 );
 731                 $pipes = array();
 732                 $process = proc_open("$wgTidyBin -config $wgTidyConf $wgTidyOpts$opts", $descriptorspec, $pipes);
 733                 if (is_resource($process)) {
 734                         // Theoretically, this style of communication could cause a deadlock
 735                         // here. If the stdout buffer fills up, then writes to stdin could
 736                         // block. This doesn't appear to happen with tidy, because tidy only
 737                         // writes to stdout after it's finished reading from stdin. Search
 738                         // for tidyParseStdin and tidySaveStdout in console/tidy.c
 739                         fwrite($pipes[0], $text);
 740                         fclose($pipes[0]);
 741                         while (!feof($pipes[1])) {
 742                                 $cleansource .= fgets($pipes[1], 1024);
 743                         }
 744                         fclose($pipes[1]);
 745                         proc_close($process);
 746                 }
 747
 748                 wfProfileOut( $fname );
 749
 750                 if( $cleansource == '' && $text != '') {
 751                         // Some kind of error happened, so we couldn't get the corrected text.
 752                         // Just give up; we'll use the source text and append a warning.
 753                         return null;
 754                 } else {
 755                         return $cleansource;
 756                 }
 757         }
 758
 759         /**
 760          * Use the HTML tidy PECL extension to use the tidy library in-process,
 761          * saving the overhead of spawning a new process. Currently written to
 762          * the PHP 4.3.x version of the extension, may not work on PHP 5.
 763          *
 764          * 'pear install tidy' should be able to compile the extension module.
 765          *
 766          * @private
 767          * @static
 768          */
 769         function internalTidy( $text ) {
 770                 global $wgTidyConf;
 771                 $fname = 'Parser::internalTidy';
 772                 wfProfileIn( $fname );
 773
 774                 tidy_load_config( $wgTidyConf );
 775                 tidy_set_encoding( 'utf8' );
 776                 tidy_parse_string( $text );
 777                 tidy_clean_repair();
 778                 if( tidy_get_status() == 2 ) {
 779                         // 2 is magic number for fatal error
 780                         // http://www.php.net/manual/en/function.tidy-get-status.php
 781                         $cleansource = null;
 782                 } else {
 783                         $cleansource = tidy_get_output();
 784                 }
 785                 wfProfileOut( $fname );
 786                 return $cleansource;
 787         }
 788
 789         /**
 790          * parse the wiki syntax used to render tables
 791          *
 792          * @private
 793          */
 794         function doTableStuff ( $t ) {
 795                 $fname = 'Parser::doTableStuff';
 796                 wfProfileIn( $fname );
 797
 798                 $t = explode ( "\n" , $t ) ;
 799                 $td = array () ; # Is currently a td tag open?
 800                 $ltd = array () ; # Was it TD or TH?
 801                 $tr = array () ; # Is currently a tr tag open?
 802                 $ltr = array () ; # tr attributes
 803                 $has_opened_tr = array(); # Did this table open a <tr> element?
 804                 $indent_level = 0; # indent level of the table
 805                 foreach ( $t AS $k => $x )
 806                 {
 807                         $x = trim ( $x ) ;
 808                         $fc = substr ( $x , 0 , 1 ) ;
 809                         $matches = array();
 810                         if ( preg_match( '/^(:*)\{\|(.*)$/', $x, $matches ) ) {
 811                                 $indent_level = strlen( $matches[1] );
 812
 813                                 $attributes = $this->unstripForHTML( $matches[2] );
 814
 815                                 $t[$k] = str_repeat( '<dl><dd>', $indent_level ) .
 816                                         '<table' . Sanitizer::fixTagAttributes ( $attributes, 'table' ) . '>' ;
 817                                 array_push ( $td , false ) ;
 818                                 array_push ( $ltd , '' ) ;
 819                                 array_push ( $tr , false ) ;
 820                                 array_push ( $ltr , '' ) ;
 821                                 array_push ( $has_opened_tr, false );
 822                         }
 823                         else if ( count ( $td ) == 0 ) { } # Don't do any of the following
 824                         else if ( '|}' == substr ( $x , 0 , 2 ) ) {
 825                                 $z = "</table>" . substr ( $x , 2);
 826                                 $l = array_pop ( $ltd ) ;
 827                                 if ( !array_pop ( $has_opened_tr ) ) $z = "<tr><td></td></tr>" . $z ;
 828                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 829                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 830                                 array_pop ( $ltr ) ;
 831                                 $t[$k] = $z . str_repeat( '</dd></dl>', $indent_level );
 832                         }
 833                         else if ( '|-' == substr ( $x , 0 , 2 ) ) { # Allows for |---------------
 834                                 $x = substr ( $x , 1 ) ;
 835                                 while ( $x != '' && substr ( $x , 0 , 1 ) == '-' ) $x = substr ( $x , 1 ) ;
 836                                 $z = '' ;
 837                                 $l = array_pop ( $ltd ) ;
 838                                 array_pop ( $has_opened_tr );
 839                                 array_push ( $has_opened_tr , true ) ;
 840                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 841                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 842                                 array_pop ( $ltr ) ;
 843                                 $t[$k] = $z ;
 844                                 array_push ( $tr , false ) ;
 845                                 array_push ( $td , false ) ;
 846                                 array_push ( $ltd , '' ) ;
 847                                 $attributes = $this->unstripForHTML( $x );
 848                                 array_push ( $ltr , Sanitizer::fixTagAttributes ( $attributes, 'tr' ) ) ;
 849                         }
 850                         else if ( '|' == $fc || '!' == $fc || '|+' == substr ( $x , 0 , 2 ) ) { # Caption
 851                                 # $x is a table row
 852                                 if ( '|+' == substr ( $x , 0 , 2 ) ) {
 853                                         $fc = '+' ;
 854                                         $x = substr ( $x , 1 ) ;
 855                                 }
 856                                 $after = substr ( $x , 1 ) ;
 857                                 if ( $fc == '!' ) $after = str_replace ( '!!' , '||' , $after ) ;
 858
 859                                 // Split up multiple cells on the same line.
 860                                 // FIXME: This can result in improper nesting of tags processed
 861                                 // by earlier parser steps, but should avoid splitting up eg
 862                                 // attribute values containing literal "||".
 863                                 $after = wfExplodeMarkup( '||', $after );
 864
 865                                 $t[$k] = '' ;
 866
 867                                 # Loop through each table cell
 868                                 foreach ( $after AS $theline )
 869                                 {
 870                                         $z = '' ;
 871                                         if ( $fc != '+' )
 872                                         {
 873                                                 $tra = array_pop ( $ltr ) ;
 874                                                 if ( !array_pop ( $tr ) ) $z = '<tr'.$tra.">\n" ;
 875                                                 array_push ( $tr , true ) ;
 876                                                 array_push ( $ltr , '' ) ;
 877                                                 array_pop ( $has_opened_tr );
 878                                                 array_push ( $has_opened_tr , true ) ;
 879                                         }
 880
 881                                         $l = array_pop ( $ltd ) ;
 882                                         if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 883                                         if ( $fc == '|' ) {
 884                                             $l = 'td' ;
 885                                         } else if ( $fc == '!' ) {
 886                                             $l = 'th' ;
 887                                         } else if ( $fc == '+' ) {
 888                                             $l = 'caption' ;
 889                                         } else {
 890                                             $l = '' ;
 891                                         }
 892                                         array_push ( $ltd , $l ) ;
 893
 894                                         # Cell parameters
 895                                         $y = explode ( '|' , $theline , 2 ) ;
 896                                         # Note that a '|' inside an invalid link should not
 897                                         # be mistaken as delimiting cell parameters
 898                                         if ( strpos( $y[0], '[[' ) !== false ) {
 899                                                 $y = array ($theline);
 900                                         }
 901                                         if ( count ( $y ) == 1 )
 902                                                 $y = "{$z}<{$l}>{$y[0]}" ;
 903                                         else {
 904                                                 $attributes = $this->unstripForHTML( $y[0] );
 905                                                 $y = "{$z}<{$l}".Sanitizer::fixTagAttributes($attributes, $l).">{$y[1]}" ;
 906                                         }
 907                                         $t[$k] .= $y ;
 908                                         array_push ( $td , true ) ;
 909                                 }
 910                         }
 911                 }
 912
 913                 # Closing open td, tr && table
 914                 while ( count ( $td ) > 0 )
 915                 {
 916                         $l = array_pop ( $ltd ) ;
 917                         if ( array_pop ( $td ) ) $t[] = '</td>' ;
 918                         if ( array_pop ( $tr ) ) $t[] = '</tr>' ;
 919                         if ( !array_pop ( $has_opened_tr ) ) $t[] = "<tr><td></td></tr>" ;
 920                         $t[] = '</table>' ;
 921                 }
 922
 923                 $t = implode ( "\n" , $t ) ;
 924                 # special case: don't return empty table
 925                 if($t == "<table>\n<tr><td></td></tr>\n</table>")
 926                         $t = '';
 927                 wfProfileOut( $fname );
 928                 return $t ;
 929         }
 930
 931         /**
 932          * Helper function for parse() that transforms wiki markup into
 933          * HTML. Only called for $mOutputType == OT_HTML.
 934          *
 935          * @private
 936          */
 937         function internalParse( $text ) {
 938                 $args = array();
 939                 $isMain = true;
 940                 $fname = 'Parser::internalParse';
 941                 wfProfileIn( $fname );
 942
 943                 # Hook to suspend the parser in this state
 944                 $x =& $this->mStripState; // FIXME: Please check that this initialization is correct.
 945                 if ( !wfRunHooks( 'ParserBeforeInternalParse', array( &$this, &$text, &$x ) ) ) {
 946                         wfProfileOut( $fname );
 947                         return $text ;
 948                 }
 949
 950                 # Remove <noinclude> tags and <includeonly> sections
 951                 $text = strtr( $text, array( '<onlyinclude>' => '' , '</onlyinclude>' => '' ) );
 952                 $text = strtr( $text, array( '<noinclude>' => '', '</noinclude>' => '') );
 953                 $text = preg_replace( '/<includeonly>.*?<\/includeonly>/s', '', $text );
 954
 955                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'attributeStripCallback' ) );
 956
 957                 $text = $this->replaceVariables( $text, $args );
 958
 959                 // Tables need to come after variable replacement for things to work
 960                 // properly; putting them before other transformations should keep
 961                 // exciting things like link expansions from showing up in surprising
 962                 // places.
 963                 $text = $this->doTableStuff( $text );
 964
 965                 $text = preg_replace( '/(^|\n)-----*/', '\\1<hr />', $text );
 966
 967                 $text = $this->stripToc( $text );
 968                 $this->stripNoGallery( $text );
 969                 $text = $this->doHeadings( $text );
 970                 if($this->mOptions->getUseDynamicDates()) {
 971                         $df =& DateFormatter::getInstance();
 972                         $text = $df->reformat( $this->mOptions->getDateFormat(), $text );
 973                 }
 974                 $text = $this->doAllQuotes( $text );
 975                 $text = $this->replaceInternalLinks( $text );
 976                 $text = $this->replaceExternalLinks( $text );
 977
 978                 # replaceInternalLinks may sometimes leave behind
 979                 # absolute URLs, which have to be masked to hide them from replaceExternalLinks
 980                 $text = str_replace($this->mUniqPrefix."NOPARSE", "", $text);
 981
 982                 $text = $this->doMagicLinks( $text );
 983                 $text = $this->formatHeadings( $text, $isMain );
 984
 985                 wfProfileOut( $fname );
 986                 return $text;
 987         }
 988
 989         /**
 990          * Replace special strings like "ISBN xxx" and "RFC xxx" with
 991          * magic external links.
 992          *
 993          * @private
 994          */
 995         function &doMagicLinks( &$text ) {
 996                 wfProfileIn( __METHOD__ );
 997                 $text = preg_replace_callback(
 998                         '!(?:                           # Start cases
 999                             <a.*?</a> |                 # Skip link text
1000                             <.*?> |                     # Skip stuff inside HTML elements
1001                             (?:RFC|PMID)\s+([0-9]+) |   # RFC or PMID, capture number as m[1]
1002                             ISBN\s+([0-9Xx-]+)          # ISBN, capture number as m[2]
1003                         )!x', array( &$this, 'magicLinkCallback' ), $text );
1004                 wfProfileOut( __METHOD__ );
1005                 return $text;
1006         }
1007
1008         function magicLinkCallback( $m ) {
1009                 if ( substr( $m[0], 0, 1 ) == '<' ) {
1010                         # Skip HTML element
1011                         return $m[0];
1012                 } elseif ( substr( $m[0], 0, 4 ) == 'ISBN' ) {
1013                         $isbn = $m[2];
1014                         $num = strtr( $isbn, array(
1015                                 '-' => '',
1016                                 ' ' => '',
1017                                 'x' => 'X',
1018                         ));
1019                         $titleObj = Title::makeTitle( NS_SPECIAL, 'Booksources' );
1020                         $text = '<a href="' .
1021                                 $titleObj->escapeLocalUrl( "isbn=$num" ) .
1022                                 "\" class=\"internal\">ISBN $isbn</a>";
1023                 } else {
1024                         if ( substr( $m[0], 0, 3 ) == 'RFC' ) {
1025                                 $keyword = 'RFC';
1026                                 $urlmsg = 'rfcurl';
1027                                 $id = $m[1];
1028                         } elseif ( substr( $m[0], 0, 4 ) == 'PMID' ) {
1029                                 $keyword = 'PMID';
1030                                 $urlmsg = 'pubmedurl';
1031                                 $id = $m[1];
1032                         } else {
1033                                 throw new MWException( __METHOD__.': unrecognised match type "' .
1034                                         substr($m[0], 0, 20 ) . '"' );
1035                         }
1036
1037                         $url = wfMsg( $urlmsg, $id);
1038                         $sk =& $this->mOptions->getSkin();
1039                         $la = $sk->getExternalLinkAttributes( $url, $keyword.$id );
1040                         $text = "<a href=\"{$url}\"{$la}>{$keyword} {$id}</a>";
1041                 }
1042                 return $text;
1043         }
1044
1045         /**
1046          * Parse headers and return html
1047          *
1048          * @private
1049          */
1050         function doHeadings( $text ) {
1051                 $fname = 'Parser::doHeadings';
1052                 wfProfileIn( $fname );
1053                 for ( $i = 6; $i >= 1; --$i ) {
1054                         $h = str_repeat( '=', $i );
1055                         $text = preg_replace( "/^{$h}(.+){$h}\\s*$/m",
1056                           "<h{$i}>\\1</h{$i}>\\2", $text );
1057                 }
1058                 wfProfileOut( $fname );
1059                 return $text;
1060         }
1061
1062         /**
1063          * Replace single quotes with HTML markup
1064          * @private
1065          * @return string the altered text
1066          */
1067         function doAllQuotes( $text ) {
1068                 $fname = 'Parser::doAllQuotes';
1069                 wfProfileIn( $fname );
1070                 $outtext = '';
1071                 $lines = explode( "\n", $text );
1072                 foreach ( $lines as $line ) {
1073                         $outtext .= $this->doQuotes ( $line ) . "\n";
1074                 }
1075                 $outtext = substr($outtext, 0,-1);
1076                 wfProfileOut( $fname );
1077                 return $outtext;
1078         }
1079
1080         /**
1081          * Helper function for doAllQuotes()
1082          * @private
1083          */
1084         function doQuotes( $text ) {
1085                 $arr = preg_split( "/(''+)/", $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1086                 if ( count( $arr ) == 1 )
1087                         return $text;
1088                 else
1089                 {
1090                         # First, do some preliminary work. This may shift some apostrophes from
1091                         # being mark-up to being text. It also counts the number of occurrences
1092                         # of bold and italics mark-ups.
1093                         $i = 0;
1094                         $numbold = 0;
1095                         $numitalics = 0;
1096                         foreach ( $arr as $r )
1097                         {
1098                                 if ( ( $i % 2 ) == 1 )
1099                                 {
1100                                         # If there are ever four apostrophes, assume the first is supposed to
1101                                         # be text, and the remaining three constitute mark-up for bold text.
1102                                         if ( strlen( $arr[$i] ) == 4 )
1103                                         {
1104                                                 $arr[$i-1] .= "'";
1105                                                 $arr[$i] = "'''";
1106                                         }
1107                                         # If there are more than 5 apostrophes in a row, assume they're all
1108                                         # text except for the last 5.
1109                                         else if ( strlen( $arr[$i] ) > 5 )
1110                                         {
1111                                                 $arr[$i-1] .= str_repeat( "'", strlen( $arr[$i] ) - 5 );
1112                                                 $arr[$i] = "'''''";
1113                                         }
1114                                         # Count the number of occurrences of bold and italics mark-ups.
1115                                         # We are not counting sequences of five apostrophes.
1116                                         if ( strlen( $arr[$i] ) == 2 )      { $numitalics++;             }
1117                                         else if ( strlen( $arr[$i] ) == 3 ) { $numbold++;                }
1118                                         else if ( strlen( $arr[$i] ) == 5 ) { $numitalics++; $numbold++; }
1119                                 }
1120                                 $i++;
1121                         }
1122
1123                         # If there is an odd number of both bold and italics, it is likely
1124                         # that one of the bold ones was meant to be an apostrophe followed
1125                         # by italics. Which one we cannot know for certain, but it is more
1126                         # likely to be one that has a single-letter word before it.
1127                         if ( ( $numbold % 2 == 1 ) && ( $numitalics % 2 == 1 ) )
1128                         {
1129                                 $i = 0;
1130                                 $firstsingleletterword = -1;
1131                                 $firstmultiletterword = -1;
1132                                 $firstspace = -1;
1133                                 foreach ( $arr as $r )
1134                                 {
1135                                         if ( ( $i % 2 == 1 ) and ( strlen( $r ) == 3 ) )
1136                                         {
1137                                                 $x1 = substr ($arr[$i-1], -1);
1138                                                 $x2 = substr ($arr[$i-1], -2, 1);
1139                                                 if ($x1 == ' ') {
1140                                                         if ($firstspace == -1) $firstspace = $i;
1141                                                 } else if ($x2 == ' ') {
1142                                                         if ($firstsingleletterword == -1) $firstsingleletterword = $i;
1143                                                 } else {
1144                                                         if ($firstmultiletterword == -1) $firstmultiletterword = $i;
1145                                                 }
1146                                         }
1147                                         $i++;
1148                                 }
1149
1150                                 # If there is a single-letter word, use it!
1151                                 if ($firstsingleletterword > -1)
1152                                 {
1153                                         $arr [ $firstsingleletterword ] = "''";
1154                                         $arr [ $firstsingleletterword-1 ] .= "'";
1155                                 }
1156                                 # If not, but there's a multi-letter word, use that one.
1157                                 else if ($firstmultiletterword > -1)
1158                                 {
1159                                         $arr [ $firstmultiletterword ] = "''";
1160                                         $arr [ $firstmultiletterword-1 ] .= "'";
1161                                 }
1162                                 # ... otherwise use the first one that has neither.
1163                                 # (notice that it is possible for all three to be -1 if, for example,
1164                                 # there is only one pentuple-apostrophe in the line)
1165                                 else if ($firstspace > -1)
1166                                 {
1167                                         $arr [ $firstspace ] = "''";
1168                                         $arr [ $firstspace-1 ] .= "'";
1169                                 }
1170                         }
1171
1172                         # Now let's actually convert our apostrophic mush to HTML!
1173                         $output = '';
1174                         $buffer = '';
1175                         $state = '';
1176                         $i = 0;
1177                         foreach ($arr as $r)
1178                         {
1179                                 if (($i % 2) == 0)
1180                                 {
1181                                         if ($state == 'both')
1182                                                 $buffer .= $r;
1183                                         else
1184                                                 $output .= $r;
1185                                 }
1186                                 else
1187                                 {
1188                                         if (strlen ($r) == 2)
1189                                         {
1190                                                 if ($state == 'i')
1191                                                 { $output .= '</i>'; $state = ''; }
1192                                                 else if ($state == 'bi')
1193                                                 { $output .= '</i>'; $state = 'b'; }
1194                                                 else if ($state == 'ib')
1195                                                 { $output .= '</b></i><b>'; $state = 'b'; }
1196                                                 else if ($state == 'both')
1197                                                 { $output .= '<b><i>'.$buffer.'</i>'; $state = 'b'; }
1198                                                 else # $state can be 'b' or ''
1199                                                 { $output .= '<i>'; $state .= 'i'; }
1200                                         }
1201                                         else if (strlen ($r) == 3)
1202                                         {
1203                                                 if ($state == 'b')
1204                                                 { $output .= '</b>'; $state = ''; }
1205                                                 else if ($state == 'bi')
1206                                                 { $output .= '</i></b><i>'; $state = 'i'; }
1207                                                 else if ($state == 'ib')
1208                                                 { $output .= '</b>'; $state = 'i'; }
1209                                                 else if ($state == 'both')
1210                                                 { $output .= '<i><b>'.$buffer.'</b>'; $state = 'i'; }
1211                                                 else # $state can be 'i' or ''
1212                                                 { $output .= '<b>'; $state .= 'b'; }
1213                                         }
1214                                         else if (strlen ($r) == 5)
1215                                         {
1216                                                 if ($state == 'b')
1217                                                 { $output .= '</b><i>'; $state = 'i'; }
1218                                                 else if ($state == 'i')
1219                                                 { $output .= '</i><b>'; $state = 'b'; }
1220                                                 else if ($state == 'bi')
1221                                                 { $output .= '</i></b>'; $state = ''; }
1222                                                 else if ($state == 'ib')
1223                                                 { $output .= '</b></i>'; $state = ''; }
1224                                                 else if ($state == 'both')
1225                                                 { $output .= '<i><b>'.$buffer.'</b></i>'; $state = ''; }
1226                                                 else # ($state == '')
1227                                                 { $buffer = ''; $state = 'both'; }
1228                                         }
1229                                 }
1230                                 $i++;
1231                         }
1232                         # Now close all remaining tags.  Notice that the order is important.
1233                         if ($state == 'b' || $state == 'ib')
1234                                 $output .= '</b>';
1235                         if ($state == 'i' || $state == 'bi' || $state == 'ib')
1236                                 $output .= '</i>';
1237                         if ($state == 'bi')
1238                                 $output .= '</b>';
1239                         if ($state == 'both')
1240                                 $output .= '<b><i>'.$buffer.'</i></b>';
1241                         return $output;
1242                 }
1243         }
1244
1245         /**
1246          * Replace external links
1247          *
1248          * Note: this is all very hackish and the order of execution matters a lot.
1249          * Make sure to run maintenance/parserTests.php if you change this code.
1250          *
1251          * @private
1252          */
1253         function replaceExternalLinks( $text ) {
1254                 global $wgContLang;
1255                 $fname = 'Parser::replaceExternalLinks';
1256                 wfProfileIn( $fname );
1257
1258                 $sk =& $this->mOptions->getSkin();
1259
1260                 $bits = preg_split( EXT_LINK_BRACKETED, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1261
1262                 $s = $this->replaceFreeExternalLinks( array_shift( $bits ) );
1263
1264                 $i = 0;
1265                 while ( $i<count( $bits ) ) {
1266                         $url = $bits[$i++];
1267                         $protocol = $bits[$i++];
1268                         $text = $bits[$i++];
1269                         $trail = $bits[$i++];
1270
1271                         # The characters '<' and '>' (which were escaped by
1272                         # removeHTMLtags()) should not be included in
1273                         # URLs, per RFC 2396.
1274                         $m2 = array();
1275                         if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1276                                 $text = substr($url, $m2[0][1]) . ' ' . $text;
1277                                 $url = substr($url, 0, $m2[0][1]);
1278                         }
1279
1280                         # If the link text is an image URL, replace it with an <img> tag
1281                         # This happened by accident in the original parser, but some people used it extensively
1282                         $img = $this->maybeMakeExternalImage( $text );
1283                         if ( $img !== false ) {
1284                                 $text = $img;
1285                         }
1286
1287                         $dtrail = '';
1288
1289                         # Set linktype for CSS - if URL==text, link is essentially free
1290                         $linktype = ($text == $url) ? 'free' : 'text';
1291
1292                         # No link text, e.g. [http://domain.tld/some.link]
1293                         if ( $text == '' ) {
1294                                 # Autonumber if allowed. See bug #5918
1295                                 if ( strpos( wfUrlProtocols(), substr($protocol, 0, strpos($protocol, ':')) ) !== false ) {
1296                                         $text = '[' . ++$this->mAutonumber . ']';
1297                                         $linktype = 'autonumber';
1298                                 } else {
1299                                         # Otherwise just use the URL
1300                                         $text = htmlspecialchars( $url );
1301                                         $linktype = 'free';
1302                                 }
1303                         } else {
1304                                 # Have link text, e.g. [http://domain.tld/some.link text]s
1305                                 # Check for trail
1306                                 list( $dtrail, $trail ) = Linker::splitTrail( $trail );
1307                         }
1308
1309                         $text = $wgContLang->markNoConversion($text);
1310
1311                         $url = Sanitizer::cleanUrl( $url );
1312
1313                         # Process the trail (i.e. everything after this link up until start of the next link),
1314                         # replacing any non-bracketed links
1315                         $trail = $this->replaceFreeExternalLinks( $trail );
1316
1317                         # Use the encoded URL
1318                         # This means that users can paste URLs directly into the text
1319                         # Funny characters like &ouml; aren't valid in URLs anyway
1320                         # This was changed in August 2004
1321                         $s .= $sk->makeExternalLink( $url, $text, false, $linktype, $this->mTitle->getNamespace() ) . $dtrail . $trail;
1322
1323                         # Register link in the output object.
1324                         # Replace unnecessary URL escape codes with the referenced character
1325                         # This prevents spammers from hiding links from the filters
1326                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1327                         $this->mOutput->addExternalLink( $pasteurized );
1328                 }
1329
1330                 wfProfileOut( $fname );
1331                 return $s;
1332         }
1333
1334         /**
1335          * Replace anything that looks like a URL with a link
1336          * @private
1337          */
1338         function replaceFreeExternalLinks( $text ) {
1339                 global $wgContLang;
1340                 $fname = 'Parser::replaceFreeExternalLinks';
1341                 wfProfileIn( $fname );
1342
1343                 $bits = preg_split( '/(\b(?:' . wfUrlProtocols() . '))/S', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1344                 $s = array_shift( $bits );
1345                 $i = 0;
1346
1347                 $sk =& $this->mOptions->getSkin();
1348
1349                 while ( $i < count( $bits ) ){
1350                         $protocol = $bits[$i++];
1351                         $remainder = $bits[$i++];
1352
1353                         $m = array();
1354                         if ( preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $remainder, $m ) ) {
1355                                 # Found some characters after the protocol that look promising
1356                                 $url = $protocol . $m[1];
1357                                 $trail = $m[2];
1358
1359                                 # special case: handle urls as url args:
1360                                 # http://www.example.com/foo?=http://www.example.com/bar
1361                                 if(strlen($trail) == 0 &&
1362                                         isset($bits[$i]) &&
1363                                         preg_match('/^'. wfUrlProtocols() . '$/S', $bits[$i]) &&
1364                                         preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $bits[$i + 1], $m ))
1365                                 {
1366                                         # add protocol, arg
1367                                         $url .= $bits[$i] . $m[1]; # protocol, url as arg to previous link
1368                                         $i += 2;
1369                                         $trail = $m[2];
1370                                 }
1371
1372                                 # The characters '<' and '>' (which were escaped by
1373                                 # removeHTMLtags()) should not be included in
1374                                 # URLs, per RFC 2396.
1375                                 $m2 = array();
1376                                 if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1377                                         $trail = substr($url, $m2[0][1]) . $trail;
1378                                         $url = substr($url, 0, $m2[0][1]);
1379                                 }
1380
1381                                 # Move trailing punctuation to $trail
1382                                 $sep = ',;\.:!?';
1383                                 # If there is no left bracket, then consider right brackets fair game too
1384                                 if ( strpos( $url, '(' ) === false ) {
1385                                         $sep .= ')';
1386                                 }
1387
1388                                 $numSepChars = strspn( strrev( $url ), $sep );
1389                                 if ( $numSepChars ) {
1390                                         $trail = substr( $url, -$numSepChars ) . $trail;
1391                                         $url = substr( $url, 0, -$numSepChars );
1392                                 }
1393
1394                                 $url = Sanitizer::cleanUrl( $url );
1395
1396                                 # Is this an external image?
1397                                 $text = $this->maybeMakeExternalImage( $url );
1398                                 if ( $text === false ) {
1399                                         # Not an image, make a link
1400                                         $text = $sk->makeExternalLink( $url, $wgContLang->markNoConversion($url), true, 'free', $this->mTitle->getNamespace() );
1401                                         # Register it in the output object...
1402                                         # Replace unnecessary URL escape codes with their equivalent characters
1403                                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1404                                         $this->mOutput->addExternalLink( $pasteurized );
1405                                 }
1406                                 $s .= $text . $trail;
1407                         } else {
1408                                 $s .= $protocol . $remainder;
1409                         }
1410                 }
1411                 wfProfileOut( $fname );
1412                 return $s;
1413         }
1414
1415         /**
1416          * Replace unusual URL escape codes with their equivalent characters
1417          * @param string
1418          * @return string
1419          * @static
1420          * @fixme This can merge genuinely required bits in the path or query string,
1421          *        breaking legit URLs. A proper fix would treat the various parts of
1422          *        the URL differently; as a workaround, just use the output for
1423          *        statistical records, not for actual linking/output.
1424          */
1425         static function replaceUnusualEscapes( $url ) {
1426                 return preg_replace_callback( '/%[0-9A-Fa-f]{2}/',
1427                         array( 'Parser', 'replaceUnusualEscapesCallback' ), $url );
1428         }
1429
1430         /**
1431          * Callback function used in replaceUnusualEscapes().
1432          * Replaces unusual URL escape codes with their equivalent character
1433          * @static
1434          * @private
1435          */
1436         private static function replaceUnusualEscapesCallback( $matches ) {
1437                 $char = urldecode( $matches[0] );
1438                 $ord = ord( $char );
1439                 // Is it an unsafe or HTTP reserved character according to RFC 1738?
1440                 if ( $ord > 32 && $ord < 127 && strpos( '<>"#{}|\^~[]`;/?', $char ) === false ) {
1441                         // No, shouldn't be escaped
1442                         return $char;
1443                 } else {
1444                         // Yes, leave it escaped
1445                         return $matches[0];
1446                 }
1447         }
1448
1449         /**
1450          * make an image if it's allowed, either through the global
1451          * option or through the exception
1452          * @private
1453          */
1454         function maybeMakeExternalImage( $url ) {
1455                 $sk =& $this->mOptions->getSkin();
1456                 $imagesfrom = $this->mOptions->getAllowExternalImagesFrom();
1457                 $imagesexception = !empty($imagesfrom);
1458                 $text = false;
1459                 if ( $this->mOptions->getAllowExternalImages()
1460                      || ( $imagesexception && strpos( $url, $imagesfrom ) === 0 ) ) {
1461                         if ( preg_match( EXT_IMAGE_REGEX, $url ) ) {
1462                                 # Image found
1463                                 $text = $sk->makeExternalImage( htmlspecialchars( $url ) );
1464                         }
1465                 }
1466                 return $text;
1467         }
1468
1469         /**
1470          * Process [[ ]] wikilinks
1471          *
1472          * @private
1473          */
1474         function replaceInternalLinks( $s ) {
1475                 global $wgContLang;
1476                 static $fname = 'Parser::replaceInternalLinks' ;
1477
1478                 wfProfileIn( $fname );
1479
1480                 wfProfileIn( $fname.'-setup' );
1481                 static $tc = FALSE;
1482                 # the % is needed to support urlencoded titles as well
1483                 if ( !$tc ) { $tc = Title::legalChars() . '#%'; }
1484
1485                 $sk =& $this->mOptions->getSkin();
1486
1487                 #split the entire text string on occurences of [[
1488                 $a = explode( '[[', ' ' . $s );
1489                 #get the first element (all text up to first [[), and remove the space we added
1490                 $s = array_shift( $a );
1491                 $s = substr( $s, 1 );
1492
1493                 # Match a link having the form [[namespace:link|alternate]]trail
1494                 static $e1 = FALSE;
1495                 if ( !$e1 ) { $e1 = "/^([{$tc}]+)(?:\\|(.+?))?]](.*)\$/sD"; }
1496                 # Match cases where there is no "]]", which might still be images
1497                 static $e1_img = FALSE;
1498                 if ( !$e1_img ) { $e1_img = "/^([{$tc}]+)\\|(.*)\$/sD"; }
1499                 # Match the end of a line for a word that's not followed by whitespace,
1500                 # e.g. in the case of 'The Arab al[[Razi]]', 'al' will be matched
1501                 $e2 = wfMsgForContent( 'linkprefix' );
1502
1503                 $useLinkPrefixExtension = $wgContLang->linkPrefixExtension();
1504
1505                 if( is_null( $this->mTitle ) ) {
1506                         throw new MWException( __METHOD__.": \$this->mTitle is null\n" );
1507                 }
1508                 $nottalk = !$this->mTitle->isTalkPage();
1509
1510                 if ( $useLinkPrefixExtension ) {
1511                         $m = array();
1512                         if ( preg_match( $e2, $s, $m ) ) {
1513                                 $first_prefix = $m[2];
1514                         } else {
1515                                 $first_prefix = false;
1516                         }
1517                 } else {
1518                         $prefix = '';
1519                 }
1520
1521                 $selflink = $this->mTitle->getPrefixedText();
1522                 $useSubpages = $this->areSubpagesAllowed();
1523                 wfProfileOut( $fname.'-setup' );
1524
1525                 # Loop for each link
1526                 for ($k = 0; isset( $a[$k] ); $k++) {
1527                         $line = $a[$k];
1528                         if ( $useLinkPrefixExtension ) {
1529                                 wfProfileIn( $fname.'-prefixhandling' );
1530                                 if ( preg_match( $e2, $s, $m ) ) {
1531                                         $prefix = $m[2];
1532                                         $s = $m[1];
1533                                 } else {
1534                                         $prefix='';
1535                                 }
1536                                 # first link
1537                                 if($first_prefix) {
1538                                         $prefix = $first_prefix;
1539                                         $first_prefix = false;
1540                                 }
1541                                 wfProfileOut( $fname.'-prefixhandling' );
1542                         }
1543
1544                         $might_be_img = false;
1545
1546                         wfProfileIn( "$fname-e1" );
1547                         if ( preg_match( $e1, $line, $m ) ) { # page with normal text or alt
1548                                 $text = $m[2];
1549                                 # If we get a ] at the beginning of $m[3] that means we have a link that's something like:
1550                                 # [[Image:Foo.jpg|[http://example.com desc]]] <- having three ] in a row fucks up,
1551                                 # the real problem is with the $e1 regex
1552                                 # See bug 1300.
1553                                 #
1554                                 # Still some problems for cases where the ] is meant to be outside punctuation,
1555                                 # and no image is in sight. See bug 2095.
1556                                 #
1557                                 if( $text !== '' &&
1558                                         substr( $m[3], 0, 1 ) === ']' &&
1559                                         strpos($text, '[') !== false
1560                                 )
1561                                 {
1562                                         $text .= ']'; # so that replaceExternalLinks($text) works later
1563                                         $m[3] = substr( $m[3], 1 );
1564                                 }
1565                                 # fix up urlencoded title texts
1566                                 if( strpos( $m[1], '%' ) !== false ) {
1567                                         # Should anchors '#' also be rejected?
1568                                         $m[1] = str_replace( array('<', '>'), array('&lt;', '&gt;'), urldecode($m[1]) );
1569                                 }
1570                                 $trail = $m[3];
1571                         } elseif( preg_match($e1_img, $line, $m) ) { # Invalid, but might be an image with a link in its caption
1572                                 $might_be_img = true;
1573                                 $text = $m[2];
1574                                 if ( strpos( $m[1], '%' ) !== false ) {
1575                                        $m[1] = urldecode($m[1]);
1576                                 }
1577                                 $trail = "";
1578                         } else { # Invalid form; output directly
1579                                 $s .= $prefix . '[[' . $line ;
1580                                 wfProfileOut( "$fname-e1" );
1581                                 continue;
1582                         }
1583                         wfProfileOut( "$fname-e1" );
1584                         wfProfileIn( "$fname-misc" );
1585
1586                         # Don't allow internal links to pages containing
1587                         # PROTO: where PROTO is a valid URL protocol; these
1588                         # should be external links.
1589                         if (preg_match('/^(\b(?:' . wfUrlProtocols() . '))/', $m[1])) {
1590                                 $s .= $prefix . '[[' . $line ;
1591                                 continue;
1592                         }
1593
1594                         # Make subpage if necessary
1595                         if( $useSubpages ) {
1596                                 $link = $this->maybeDoSubpageLink( $m[1], $text );
1597                         } else {
1598                                 $link = $m[1];
1599                         }
1600
1601                         $noforce = (substr($m[1], 0, 1) != ':');
1602                         if (!$noforce) {
1603                                 # Strip off leading ':'
1604                                 $link = substr($link, 1);
1605                         }
1606
1607                         wfProfileOut( "$fname-misc" );
1608                         wfProfileIn( "$fname-title" );
1609                         $nt = Title::newFromText( $this->unstripNoWiki($link, $this->mStripState) );
1610                         if( !$nt ) {
1611                                 $s .= $prefix . '[[' . $line;
1612                                 wfProfileOut( "$fname-title" );
1613                                 continue;
1614                         }
1615
1616                         $ns = $nt->getNamespace();
1617                         $iw = $nt->getInterWiki();
1618                         wfProfileOut( "$fname-title" );
1619
1620                         if ($might_be_img) { # if this is actually an invalid link
1621                                 wfProfileIn( "$fname-might_be_img" );
1622                                 if ($ns == NS_IMAGE && $noforce) { #but might be an image
1623                                         $found = false;
1624                                         while (isset ($a[$k+1]) ) {
1625                                                 #look at the next 'line' to see if we can close it there
1626                                                 $spliced = array_splice( $a, $k + 1, 1 );
1627                                                 $next_line = array_shift( $spliced );
1628                                                 $m = explode( ']]', $next_line, 3 );
1629                                                 if ( count( $m ) == 3 ) {
1630                                                         # the first ]] closes the inner link, the second the image
1631                                                         $found = true;
1632                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1633                                                         $trail = $m[2];
1634                                                         break;
1635                                                 } elseif ( count( $m ) == 2 ) {
1636                                                         #if there's exactly one ]] that's fine, we'll keep looking
1637                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1638                                                 } else {
1639                                                         #if $next_line is invalid too, we need look no further
1640                                                         $text .= '[[' . $next_line;
1641                                                         break;
1642                                                 }
1643                                         }
1644                                         if ( !$found ) {
1645                                                 # we couldn't find the end of this imageLink, so output it raw
1646                                                 #but don't ignore what might be perfectly normal links in the text we've examined
1647                                                 $text = $this->replaceInternalLinks($text);
1648                                                 $s .= "{$prefix}[[$link|$text";
1649                                                 # note: no $trail, because without an end, there *is* no trail
1650                                                 wfProfileOut( "$fname-might_be_img" );
1651                                                 continue;
1652                                         }
1653                                 } else { #it's not an image, so output it raw
1654                                         $s .= "{$prefix}[[$link|$text";
1655                                         # note: no $trail, because without an end, there *is* no trail
1656                                         wfProfileOut( "$fname-might_be_img" );
1657                                         continue;
1658                                 }
1659                                 wfProfileOut( "$fname-might_be_img" );
1660                         }
1661
1662                         $wasblank = ( '' == $text );
1663                         if( $wasblank ) $text = $link;
1664
1665                         # Link not escaped by : , create the various objects
1666                         if( $noforce ) {
1667
1668                                 # Interwikis
1669                                 wfProfileIn( "$fname-interwiki" );
1670                                 if( $iw && $this->mOptions->getInterwikiMagic() && $nottalk && $wgContLang->getLanguageName( $iw ) ) {
1671                                         $this->mOutput->addLanguageLink( $nt->getFullText() );
1672                                         $s = rtrim($s . "\n");
1673                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1674                                         wfProfileOut( "$fname-interwiki" );
1675                                         continue;
1676                                 }
1677                                 wfProfileOut( "$fname-interwiki" );
1678
1679                                 if ( $ns == NS_IMAGE ) {
1680                                         wfProfileIn( "$fname-image" );
1681                                         if ( !wfIsBadImage( $nt->getDBkey(), $this->mTitle ) ) {
1682                                                 # recursively parse links inside the image caption
1683                                                 # actually, this will parse them in any other parameters, too,
1684                                                 # but it might be hard to fix that, and it doesn't matter ATM
1685                                                 $text = $this->replaceExternalLinks($text);
1686                                                 $text = $this->replaceInternalLinks($text);
1687
1688                                                 # cloak any absolute URLs inside the image markup, so replaceExternalLinks() won't touch them
1689                                                 $s .= $prefix . $this->armorLinks( $this->makeImage( $nt, $text ) ) . $trail;
1690                                                 $this->mOutput->addImage( $nt->getDBkey() );
1691
1692                                                 wfProfileOut( "$fname-image" );
1693                                                 continue;
1694                                         } else {
1695                                                 # We still need to record the image's presence on the page
1696                                                 $this->mOutput->addImage( $nt->getDBkey() );
1697                                         }
1698                                         wfProfileOut( "$fname-image" );
1699
1700                                 }
1701
1702                                 if ( $ns == NS_CATEGORY ) {
1703                                         wfProfileIn( "$fname-category" );
1704                                         $s = rtrim($s . "\n"); # bug 87
1705
1706                                         if ( $wasblank ) {
1707                                                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1708                                                         $sortkey = $this->mTitle->getText();
1709                                                 } else {
1710                                                         $sortkey = $this->mTitle->getPrefixedText();
1711                                                 }
1712                                         } else {
1713                                                 $sortkey = $text;
1714                                         }
1715                                         $sortkey = Sanitizer::decodeCharReferences( $sortkey );
1716                                         $sortkey = str_replace( "\n", '', $sortkey );
1717                                         $sortkey = $wgContLang->convertCategoryKey( $sortkey );
1718                                         $this->mOutput->addCategory( $nt->getDBkey(), $sortkey );
1719
1720                                         /**
1721                                          * Strip the whitespace Category links produce, see bug 87
1722                                          * @todo We might want to use trim($tmp, "\n") here.
1723                                          */
1724                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1725
1726                                         wfProfileOut( "$fname-category" );
1727                                         continue;
1728                                 }
1729                         }
1730
1731                         if( ( $nt->getPrefixedText() === $selflink ) &&
1732                             ( $nt->getFragment() === '' ) ) {
1733                                 # Self-links are handled specially; generally de-link and change to bold.
1734                                 $s .= $prefix . $sk->makeSelfLinkObj( $nt, $text, '', $trail );
1735                                 continue;
1736                         }
1737
1738                         # Special and Media are pseudo-namespaces; no pages actually exist in them
1739                         if( $ns == NS_MEDIA ) {
1740                                 $link = $sk->makeMediaLinkObj( $nt, $text );
1741                                 # Cloak with NOPARSE to avoid replacement in replaceExternalLinks
1742                                 $s .= $prefix . $this->armorLinks( $link ) . $trail;
1743                                 $this->mOutput->addImage( $nt->getDBkey() );
1744                                 continue;
1745                         } elseif( $ns == NS_SPECIAL ) {
1746                                 $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1747                                 continue;
1748                         } elseif( $ns == NS_IMAGE ) {
1749                                 $img = new Image( $nt );
1750                                 if( $img->exists() ) {
1751                                         // Force a blue link if the file exists; may be a remote
1752                                         // upload on the shared repository, and we want to see its
1753                                         // auto-generated page.
1754                                         $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1755                                         $this->mOutput->addLink( $nt );
1756                                         continue;
1757                                 }
1758                         }
1759                         $s .= $this->makeLinkHolder( $nt, $text, '', $trail, $prefix );
1760                 }
1761                 wfProfileOut( $fname );
1762                 return $s;
1763         }
1764
1765         /**
1766          * Make a link placeholder. The text returned can be later resolved to a real link with
1767          * replaceLinkHolders(). This is done for two reasons: firstly to avoid further
1768          * parsing of interwiki links, and secondly to allow all existence checks and
1769          * article length checks (for stub links) to be bundled into a single query.
1770          *
1771          */
1772         function makeLinkHolder( &$nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1773                 wfProfileIn( __METHOD__ );
1774                 if ( ! is_object($nt) ) {
1775                         # Fail gracefully
1776                         $retVal = "<!-- ERROR -->{$prefix}{$text}{$trail}";
1777                 } else {
1778                         # Separate the link trail from the rest of the link
1779                         list( $inside, $trail ) = Linker::splitTrail( $trail );
1780
1781                         if ( $nt->isExternal() ) {
1782                                 $nr = array_push( $this->mInterwikiLinkHolders['texts'], $prefix.$text.$inside );
1783                                 $this->mInterwikiLinkHolders['titles'][] = $nt;
1784                                 $retVal = '<!--IWLINK '. ($nr-1) ."-->{$trail}";
1785                         } else {
1786                                 $nr = array_push( $this->mLinkHolders['namespaces'], $nt->getNamespace() );
1787                                 $this->mLinkHolders['dbkeys'][] = $nt->getDBkey();
1788                                 $this->mLinkHolders['queries'][] = $query;
1789                                 $this->mLinkHolders['texts'][] = $prefix.$text.$inside;
1790                                 $this->mLinkHolders['titles'][] = $nt;
1791
1792                                 $retVal = '<!--LINK '. ($nr-1) ."-->{$trail}";
1793                         }
1794                 }
1795                 wfProfileOut( __METHOD__ );
1796                 return $retVal;
1797         }
1798
1799         /**
1800          * Render a forced-blue link inline; protect against double expansion of
1801          * URLs if we're in a mode that prepends full URL prefixes to internal links.
1802          * Since this little disaster has to split off the trail text to avoid
1803          * breaking URLs in the following text without breaking trails on the
1804          * wiki links, it's been made into a horrible function.
1805          *
1806          * @param Title $nt
1807          * @param string $text
1808          * @param string $query
1809          * @param string $trail
1810          * @param string $prefix
1811          * @return string HTML-wikitext mix oh yuck
1812          */
1813         function makeKnownLinkHolder( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1814                 list( $inside, $trail ) = Linker::splitTrail( $trail );
1815                 $sk =& $this->mOptions->getSkin();
1816                 $link = $sk->makeKnownLinkObj( $nt, $text, $query, $inside, $prefix );
1817                 return $this->armorLinks( $link ) . $trail;
1818         }
1819
1820         /**
1821          * Insert a NOPARSE hacky thing into any inline links in a chunk that's
1822          * going to go through further parsing steps before inline URL expansion.
1823          *
1824          * In particular this is important when using action=render, which causes
1825          * full URLs to be included.
1826          *
1827          * Oh man I hate our multi-layer parser!
1828          *
1829          * @param string more-or-less HTML
1830          * @return string less-or-more HTML with NOPARSE bits
1831          */
1832         function armorLinks( $text ) {
1833                 return preg_replace( "/\b(" . wfUrlProtocols() . ')/',
1834                         "{$this->mUniqPrefix}NOPARSE$1", $text );
1835         }
1836
1837         /**
1838          * Return true if subpage links should be expanded on this page.
1839          * @return bool
1840          */
1841         function areSubpagesAllowed() {
1842                 # Some namespaces don't allow subpages
1843                 global $wgNamespacesWithSubpages;
1844                 return !empty($wgNamespacesWithSubpages[$this->mTitle->getNamespace()]);
1845         }
1846
1847         /**
1848          * Handle link to subpage if necessary
1849          * @param string $target the source of the link
1850          * @param string &$text the link text, modified as necessary
1851          * @return string the full name of the link
1852          * @private
1853          */
1854         function maybeDoSubpageLink($target, &$text) {
1855                 # Valid link forms:
1856                 # Foobar -- normal
1857                 # :Foobar -- override special treatment of prefix (images, language links)
1858                 # /Foobar -- convert to CurrentPage/Foobar
1859                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1860                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1861                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1862
1863                 $fname = 'Parser::maybeDoSubpageLink';
1864                 wfProfileIn( $fname );
1865                 $ret = $target; # default return value is no change
1866
1867                 # bug 7425
1868                 $target = trim( $target );
1869
1870                 # Some namespaces don't allow subpages,
1871                 # so only perform processing if subpages are allowed
1872                 if( $this->areSubpagesAllowed() ) {
1873                         # Look at the first character
1874                         if( $target != '' && $target{0} == '/' ) {
1875                                 # / at end means we don't want the slash to be shown
1876                                 if( substr( $target, -1, 1 ) == '/' ) {
1877                                         $target = substr( $target, 1, -1 );
1878                                         $noslash = $target;
1879                                 } else {
1880                                         $noslash = substr( $target, 1 );
1881                                 }
1882
1883                                 $ret = $this->mTitle->getPrefixedText(). '/' . trim($noslash);
1884                                 if( '' === $text ) {
1885                                         $text = $target;
1886                                 } # this might be changed for ugliness reasons
1887                         } else {
1888                                 # check for .. subpage backlinks
1889                                 $dotdotcount = 0;
1890                                 $nodotdot = $target;
1891                                 while( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1892                                         ++$dotdotcount;
1893                                         $nodotdot = substr( $nodotdot, 3 );
1894                                 }
1895                                 if($dotdotcount > 0) {
1896                                         $exploded = explode( '/', $this->mTitle->GetPrefixedText() );
1897                                         if( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1898                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1899                                                 # / at the end means don't show full path
1900                                                 if( substr( $nodotdot, -1, 1 ) == '/' ) {
1901                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1902                                                         if( '' === $text ) {
1903                                                                 $text = $nodotdot;
1904                                                         }
1905                                                 }
1906                                                 $nodotdot = trim( $nodotdot );
1907                                                 if( $nodotdot != '' ) {
1908                                                         $ret .= '/' . $nodotdot;
1909                                                 }
1910                                         }
1911                                 }
1912                         }
1913                 }
1914
1915                 wfProfileOut( $fname );
1916                 return $ret;
1917         }
1918
1919         /**#@+
1920          * Used by doBlockLevels()
1921          * @private
1922          */
1923         /* private */ function closeParagraph() {
1924                 $result = '';
1925                 if ( '' != $this->mLastSection ) {
1926                         $result = '</' . $this->mLastSection  . ">\n";
1927                 }
1928                 $this->mInPre = false;
1929                 $this->mLastSection = '';
1930                 return $result;
1931         }
1932         # getCommon() returns the length of the longest common substring
1933         # of both arguments, starting at the beginning of both.
1934         #
1935         /* private */ function getCommon( $st1, $st2 ) {
1936                 $fl = strlen( $st1 );
1937                 $shorter = strlen( $st2 );
1938                 if ( $fl < $shorter ) { $shorter = $fl; }
1939
1940                 for ( $i = 0; $i < $shorter; ++$i ) {
1941                         if ( $st1{$i} != $st2{$i} ) { break; }
1942                 }
1943                 return $i;
1944         }
1945         # These next three functions open, continue, and close the list
1946         # element appropriate to the prefix character passed into them.
1947         #
1948         /* private */ function openList( $char ) {
1949                 $result = $this->closeParagraph();
1950
1951                 if ( '*' == $char ) { $result .= '<ul><li>'; }
1952                 else if ( '#' == $char ) { $result .= '<ol><li>'; }
1953                 else if ( ':' == $char ) { $result .= '<dl><dd>'; }
1954                 else if ( ';' == $char ) {
1955                         $result .= '<dl><dt>';
1956                         $this->mDTopen = true;
1957                 }
1958                 else { $result = '<!-- ERR 1 -->'; }
1959
1960                 return $result;
1961         }
1962
1963         /* private */ function nextItem( $char ) {
1964                 if ( '*' == $char || '#' == $char ) { return '</li><li>'; }
1965                 else if ( ':' == $char || ';' == $char ) {
1966                         $close = '</dd>';
1967                         if ( $this->mDTopen ) { $close = '</dt>'; }
1968                         if ( ';' == $char ) {
1969                                 $this->mDTopen = true;
1970                                 return $close . '<dt>';
1971                         } else {
1972                                 $this->mDTopen = false;
1973                                 return $close . '<dd>';
1974                         }
1975                 }
1976                 return '<!-- ERR 2 -->';
1977         }
1978
1979         /* private */ function closeList( $char ) {
1980                 if ( '*' == $char ) { $text = '</li></ul>'; }
1981                 else if ( '#' == $char ) { $text = '</li></ol>'; }
1982                 else if ( ':' == $char ) {
1983                         if ( $this->mDTopen ) {
1984                                 $this->mDTopen = false;
1985                                 $text = '</dt></dl>';
1986                         } else {
1987                                 $text = '</dd></dl>';
1988                         }
1989                 }
1990                 else {  return '<!-- ERR 3 -->'; }
1991                 return $text."\n";
1992         }
1993         /**#@-*/
1994
1995         /**
1996          * Make lists from lines starting with ':', '*', '#', etc.
1997          *
1998          * @private
1999          * @return string the lists rendered as HTML
2000          */
2001         function doBlockLevels( $text, $linestart ) {
2002                 $fname = 'Parser::doBlockLevels';
2003                 wfProfileIn( $fname );
2004
2005                 # Parsing through the text line by line.  The main thing
2006                 # happening here is handling of block-level elements p, pre,
2007                 # and making lists from lines starting with * # : etc.
2008                 #
2009                 $textLines = explode( "\n", $text );
2010
2011                 $lastPrefix = $output = '';
2012                 $this->mDTopen = $inBlockElem = false;
2013                 $prefixLength = 0;
2014                 $paragraphStack = false;
2015
2016                 if ( !$linestart ) {
2017                         $output .= array_shift( $textLines );
2018                 }
2019                 foreach ( $textLines as $oLine ) {
2020                         $lastPrefixLength = strlen( $lastPrefix );
2021                         $preCloseMatch = preg_match('/<\\/pre/i', $oLine );
2022                         $preOpenMatch = preg_match('/<pre/i', $oLine );
2023                         if ( !$this->mInPre ) {
2024                                 # Multiple prefixes may abut each other for nested lists.
2025                                 $prefixLength = strspn( $oLine, '*#:;' );
2026                                 $pref = substr( $oLine, 0, $prefixLength );
2027
2028                                 # eh?
2029                                 $pref2 = str_replace( ';', ':', $pref );
2030                                 $t = substr( $oLine, $prefixLength );
2031                                 $this->mInPre = !empty($preOpenMatch);
2032                         } else {
2033                                 # Don't interpret any other prefixes in preformatted text
2034                                 $prefixLength = 0;
2035                                 $pref = $pref2 = '';
2036                                 $t = $oLine;
2037                         }
2038
2039                         # List generation
2040                         if( $prefixLength && 0 == strcmp( $lastPrefix, $pref2 ) ) {
2041                                 # Same as the last item, so no need to deal with nesting or opening stuff
2042                                 $output .= $this->nextItem( substr( $pref, -1 ) );
2043                                 $paragraphStack = false;
2044
2045                                 if ( substr( $pref, -1 ) == ';') {
2046                                         # The one nasty exception: definition lists work like this:
2047                                         # ; title : definition text
2048                                         # So we check for : in the remainder text to split up the
2049                                         # title and definition, without b0rking links.
2050                                         $term = $t2 = '';
2051                                         if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2052                                                 $t = $t2;
2053                                                 $output .= $term . $this->nextItem( ':' );
2054                                         }
2055                                 }
2056                         } elseif( $prefixLength || $lastPrefixLength ) {
2057                                 # Either open or close a level...
2058                                 $commonPrefixLength = $this->getCommon( $pref, $lastPrefix );
2059                                 $paragraphStack = false;
2060
2061                                 while( $commonPrefixLength < $lastPrefixLength ) {
2062                                         $output .= $this->closeList( $lastPrefix{$lastPrefixLength-1} );
2063                                         --$lastPrefixLength;
2064                                 }
2065                                 if ( $prefixLength <= $commonPrefixLength && $commonPrefixLength > 0 ) {
2066                                         $output .= $this->nextItem( $pref{$commonPrefixLength-1} );
2067                                 }
2068                                 while ( $prefixLength > $commonPrefixLength ) {
2069                                         $char = substr( $pref, $commonPrefixLength, 1 );
2070                                         $output .= $this->openList( $char );
2071
2072                                         if ( ';' == $char ) {
2073                                                 # FIXME: This is dupe of code above
2074                                                 if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2075                                                         $t = $t2;
2076                                                         $output .= $term . $this->nextItem( ':' );
2077                                                 }
2078                                         }
2079                                         ++$commonPrefixLength;
2080                                 }
2081                                 $lastPrefix = $pref2;
2082                         }
2083                         if( 0 == $prefixLength ) {
2084                                 wfProfileIn( "$fname-paragraph" );
2085                                 # No prefix (not in list)--go to paragraph mode
2086                                 // XXX: use a stack for nestable elements like span, table and div
2087                                 $openmatch = preg_match('/(<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<pre|<tr|<p|<ul|<ol|<li|<\\/center|<\\/tr|<\\/td|<\\/th)/iS', $t );
2088                                 $closematch = preg_match(
2089                                         '/(<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6|'.
2090                                         '<td|<th|<div|<\\/div|<hr|<\\/pre|<\\/p|'.$this->mUniqPrefix.'-pre|<\\/li|<\\/ul|<\\/ol|<center)/iS', $t );
2091                                 if ( $openmatch or $closematch ) {
2092                                         $paragraphStack = false;
2093                                         # TODO bug 5718: paragraph closed
2094                                         $output .= $this->closeParagraph();
2095                                         if ( $preOpenMatch and !$preCloseMatch ) {
2096                                                 $this->mInPre = true;
2097                                         }
2098                                         if ( $closematch ) {
2099                                                 $inBlockElem = false;
2100                                         } else {
2101                                                 $inBlockElem = true;
2102                                         }
2103                                 } else if ( !$inBlockElem && !$this->mInPre ) {
2104                                         if ( ' ' == $t{0} and ( $this->mLastSection == 'pre' or trim($t) != '' ) ) {
2105                                                 // pre
2106                                                 if ($this->mLastSection != 'pre') {
2107                                                         $paragraphStack = false;
2108                                                         $output .= $this->closeParagraph().'<pre>';
2109                                                         $this->mLastSection = 'pre';
2110                                                 }
2111                                                 $t = substr( $t, 1 );
2112                                         } else {
2113                                                 // paragraph
2114                                                 if ( '' == trim($t) ) {
2115                                                         if ( $paragraphStack ) {
2116                                                                 $output .= $paragraphStack.'<br />';
2117                                                                 $paragraphStack = false;
2118                                                                 $this->mLastSection = 'p';
2119                                                         } else {
2120                                                                 if ($this->mLastSection != 'p' ) {
2121                                                                         $output .= $this->closeParagraph();
2122                                                                         $this->mLastSection = '';
2123                                                                         $paragraphStack = '<p>';
2124                                                                 } else {
2125                                                                         $paragraphStack = '</p><p>';
2126                                                                 }
2127                                                         }
2128                                                 } else {
2129                                                         if ( $paragraphStack ) {
2130                                                                 $output .= $paragraphStack;
2131                                                                 $paragraphStack = false;
2132                                                                 $this->mLastSection = 'p';
2133                                                         } else if ($this->mLastSection != 'p') {
2134                                                                 $output .= $this->closeParagraph().'<p>';
2135                                                                 $this->mLastSection = 'p';
2136                                                         }
2137                                                 }
2138                                         }
2139                                 }
2140                                 wfProfileOut( "$fname-paragraph" );
2141                         }
2142                         // somewhere above we forget to get out of pre block (bug 785)
2143                         if($preCloseMatch && $this->mInPre) {
2144                                 $this->mInPre = false;
2145                         }
2146                         if ($paragraphStack === false) {
2147                                 $output .= $t."\n";
2148                         }
2149                 }
2150                 while ( $prefixLength ) {
2151                         $output .= $this->closeList( $pref2{$prefixLength-1} );
2152                         --$prefixLength;
2153                 }
2154                 if ( '' != $this->mLastSection ) {
2155                         $output .= '</' . $this->mLastSection . '>';
2156                         $this->mLastSection = '';
2157                 }
2158
2159                 wfProfileOut( $fname );
2160                 return $output;
2161         }
2162
2163         /**
2164          * Split up a string on ':', ignoring any occurences inside tags
2165          * to prevent illegal overlapping.
2166          * @param string $str the string to split
2167          * @param string &$before set to everything before the ':'
2168          * @param string &$after set to everything after the ':'
2169          * return string the position of the ':', or false if none found
2170          */
2171         function findColonNoLinks($str, &$before, &$after) {
2172                 $fname = 'Parser::findColonNoLinks';
2173                 wfProfileIn( $fname );
2174
2175                 $pos = strpos( $str, ':' );
2176                 if( $pos === false ) {
2177                         // Nothing to find!
2178                         wfProfileOut( $fname );
2179                         return false;
2180                 }
2181
2182                 $lt = strpos( $str, '<' );
2183                 if( $lt === false || $lt > $pos ) {
2184                         // Easy; no tag nesting to worry about
2185                         $before = substr( $str, 0, $pos );
2186                         $after = substr( $str, $pos+1 );
2187                         wfProfileOut( $fname );
2188                         return $pos;
2189                 }
2190
2191                 // Ugly state machine to walk through avoiding tags.
2192                 $state = MW_COLON_STATE_TEXT;
2193                 $stack = 0;
2194                 $len = strlen( $str );
2195                 for( $i = 0; $i < $len; $i++ ) {
2196                         $c = $str{$i};
2197
2198                         switch( $state ) {
2199                         // (Using the number is a performance hack for common cases)
2200                         case 0: // MW_COLON_STATE_TEXT:
2201                                 switch( $c ) {
2202                                 case "<":
2203                                         // Could be either a <start> tag or an </end> tag
2204                                         $state = MW_COLON_STATE_TAGSTART;
2205                                         break;
2206                                 case ":":
2207                                         if( $stack == 0 ) {
2208                                                 // We found it!
2209                                                 $before = substr( $str, 0, $i );
2210                                                 $after = substr( $str, $i + 1 );
2211                                                 wfProfileOut( $fname );
2212                                                 return $i;
2213                                         }
2214                                         // Embedded in a tag; don't break it.
2215                                         break;
2216                                 default:
2217                                         // Skip ahead looking for something interesting
2218                                         $colon = strpos( $str, ':', $i );
2219                                         if( $colon === false ) {
2220                                                 // Nothing else interesting
2221                                                 wfProfileOut( $fname );
2222                                                 return false;
2223                                         }
2224                                         $lt = strpos( $str, '<', $i );
2225                                         if( $stack === 0 ) {
2226                                                 if( $lt === false || $colon < $lt ) {
2227                                                         // We found it!
2228                                                         $before = substr( $str, 0, $colon );
2229                                                         $after = substr( $str, $colon + 1 );
2230                                                         wfProfileOut( $fname );
2231                                                         return $i;
2232                                                 }
2233                                         }
2234                                         if( $lt === false ) {
2235                                                 // Nothing else interesting to find; abort!
2236                                                 // We're nested, but there's no close tags left. Abort!
2237                                                 break 2;
2238                                         }
2239                                         // Skip ahead to next tag start
2240                                         $i = $lt;
2241                                         $state = MW_COLON_STATE_TAGSTART;
2242                                 }
2243                                 break;
2244                         case 1: // MW_COLON_STATE_TAG:
2245                                 // In a <tag>
2246                                 switch( $c ) {
2247                                 case ">":
2248                                         $stack++;
2249                                         $state = MW_COLON_STATE_TEXT;
2250                                         break;
2251                                 case "/":
2252                                         // Slash may be followed by >?
2253                                         $state = MW_COLON_STATE_TAGSLASH;
2254                                         break;
2255                                 default:
2256                                         // ignore
2257                                 }
2258                                 break;
2259                         case 2: // MW_COLON_STATE_TAGSTART:
2260                                 switch( $c ) {
2261                                 case "/":
2262                                         $state = MW_COLON_STATE_CLOSETAG;
2263                                         break;
2264                                 case "!":
2265                                         $state = MW_COLON_STATE_COMMENT;
2266                                         break;
2267                                 case ">":
2268                                         // Illegal early close? This shouldn't happen D:
2269                                         $state = MW_COLON_STATE_TEXT;
2270                                         break;
2271                                 default:
2272                                         $state = MW_COLON_STATE_TAG;
2273                                 }
2274                                 break;
2275                         case 3: // MW_COLON_STATE_CLOSETAG:
2276                                 // In a </tag>
2277                                 if( $c == ">" ) {
2278                                         $stack--;
2279                                         if( $stack < 0 ) {
2280                                                 wfDebug( "Invalid input in $fname; too many close tags\n" );
2281                                                 wfProfileOut( $fname );
2282                                                 return false;
2283                                         }
2284                                         $state = MW_COLON_STATE_TEXT;
2285                                 }
2286                                 break;
2287                         case MW_COLON_STATE_TAGSLASH:
2288                                 if( $c == ">" ) {
2289                                         // Yes, a self-closed tag <blah/>
2290                                         $state = MW_COLON_STATE_TEXT;
2291                                 } else {
2292                                         // Probably we're jumping the gun, and this is an attribute
2293                                         $state = MW_COLON_STATE_TAG;
2294                                 }
2295                                 break;
2296                         case 5: // MW_COLON_STATE_COMMENT:
2297                                 if( $c == "-" ) {
2298                                         $state = MW_COLON_STATE_COMMENTDASH;
2299                                 }
2300                                 break;
2301                         case MW_COLON_STATE_COMMENTDASH:
2302                                 if( $c == "-" ) {
2303                                         $state = MW_COLON_STATE_COMMENTDASHDASH;
2304                                 } else {
2305                                         $state = MW_COLON_STATE_COMMENT;
2306                                 }
2307                                 break;
2308                         case MW_COLON_STATE_COMMENTDASHDASH:
2309                                 if( $c == ">" ) {
2310                                         $state = MW_COLON_STATE_TEXT;
2311                                 } else {
2312                                         $state = MW_COLON_STATE_COMMENT;
2313                                 }
2314                                 break;
2315                         default:
2316                                 throw new MWException( "State machine error in $fname" );
2317                         }
2318                 }
2319                 if( $stack > 0 ) {
2320                         wfDebug( "Invalid input in $fname; not enough close tags (stack $stack, state $state)\n" );
2321                         return false;
2322                 }
2323                 wfProfileOut( $fname );
2324                 return false;
2325         }
2326
2327         /**
2328          * Return value of a magic variable (like PAGENAME)
2329          *
2330          * @private
2331          */
2332         function getVariableValue( $index ) {
2333                 global $wgContLang, $wgSitename, $wgServer, $wgServerName, $wgScriptPath;
2334
2335                 /**
2336                  * Some of these require message or data lookups and can be
2337                  * expensive to check many times.
2338                  */
2339                 static $varCache = array();
2340                 if ( wfRunHooks( 'ParserGetVariableValueVarCache', array( &$this, &$varCache ) ) ) {
2341                         if ( isset( $varCache[$index] ) ) {
2342                                 return $varCache[$index];
2343                         }
2344                 }
2345
2346                 $ts = time();
2347                 wfRunHooks( 'ParserGetVariableValueTs', array( &$this, &$ts ) );
2348
2349                 # Use the time zone
2350                 global $wgLocaltimezone;
2351                 if ( isset( $wgLocaltimezone ) ) {
2352                         $oldtz = getenv( 'TZ' );
2353                         putenv( 'TZ='.$wgLocaltimezone );
2354                 }
2355                 $localTimestamp = date( 'YmdHis', $ts );
2356                 $localMonth = date( 'm', $ts );
2357                 $localMonthName = date( 'n', $ts );
2358                 $localDay = date( 'j', $ts );
2359                 $localDay2 = date( 'd', $ts );
2360                 $localDayOfWeek = date( 'w', $ts );
2361                 $localWeek = date( 'W', $ts );
2362                 $localYear = date( 'Y', $ts );
2363                 $localHour = date( 'H', $ts );
2364                 if ( isset( $wgLocaltimezone ) ) {
2365                         putenv( 'TZ='.$oldtz );
2366                 }
2367
2368                 switch ( $index ) {
2369                         case 'currentmonth':
2370                                 return $varCache[$index] = $wgContLang->formatNum( date( 'm', $ts ) );
2371                         case 'currentmonthname':
2372                                 return $varCache[$index] = $wgContLang->getMonthName( date( 'n', $ts ) );
2373                         case 'currentmonthnamegen':
2374                                 return $varCache[$index] = $wgContLang->getMonthNameGen( date( 'n', $ts ) );
2375                         case 'currentmonthabbrev':
2376                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( date( 'n', $ts ) );
2377                         case 'currentday':
2378                                 return $varCache[$index] = $wgContLang->formatNum( date( 'j', $ts ) );
2379                         case 'currentday2':
2380                                 return $varCache[$index] = $wgContLang->formatNum( date( 'd', $ts ) );
2381                         case 'localmonth':
2382                                 return $varCache[$index] = $wgContLang->formatNum( $localMonth );
2383                         case 'localmonthname':
2384                                 return $varCache[$index] = $wgContLang->getMonthName( $localMonthName );
2385                         case 'localmonthnamegen':
2386                                 return $varCache[$index] = $wgContLang->getMonthNameGen( $localMonthName );
2387                         case 'localmonthabbrev':
2388                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( $localMonthName );
2389                         case 'localday':
2390                                 return $varCache[$index] = $wgContLang->formatNum( $localDay );
2391                         case 'localday2':
2392                                 return $varCache[$index] = $wgContLang->formatNum( $localDay2 );
2393                         case 'pagename':
2394                                 return $this->mTitle->getText();
2395                         case 'pagenamee':
2396                                 return $this->mTitle->getPartialURL();
2397                         case 'fullpagename':
2398                                 return $this->mTitle->getPrefixedText();
2399                         case 'fullpagenamee':
2400                                 return $this->mTitle->getPrefixedURL();
2401                         case 'subpagename':
2402                                 return $this->mTitle->getSubpageText();
2403                         case 'subpagenamee':
2404                                 return $this->mTitle->getSubpageUrlForm();
2405                         case 'basepagename':
2406                                 return $this->mTitle->getBaseText();
2407                         case 'basepagenamee':
2408                                 return wfUrlEncode( str_replace( ' ', '_', $this->mTitle->getBaseText() ) );
2409                         case 'talkpagename':
2410                                 if( $this->mTitle->canTalk() ) {
2411                                         $talkPage = $this->mTitle->getTalkPage();
2412                                         return $talkPage->getPrefixedText();
2413                                 } else {
2414                                         return '';
2415                                 }
2416                         case 'talkpagenamee':
2417                                 if( $this->mTitle->canTalk() ) {
2418                                         $talkPage = $this->mTitle->getTalkPage();
2419                                         return $talkPage->getPrefixedUrl();
2420                                 } else {
2421                                         return '';
2422                                 }
2423                         case 'subjectpagename':
2424                                 $subjPage = $this->mTitle->getSubjectPage();
2425                                 return $subjPage->getPrefixedText();
2426                         case 'subjectpagenamee':
2427                                 $subjPage = $this->mTitle->getSubjectPage();
2428                                 return $subjPage->getPrefixedUrl();
2429                         case 'revisionid':
2430                                 return $this->mRevisionId;
2431                         case 'revisionday':
2432                                 return intval( substr( wfRevisionTimestamp( $this->mRevisionId ), 6, 2 ) );
2433                         case 'revisionday2':
2434                                 return substr( wfRevisionTimestamp( $this->mRevisionId ), 6, 2 );
2435                         case 'revisionmonth':
2436                                 return intval( substr( wfRevisionTimestamp( $this->mRevisionId ), 4, 2 ) );
2437                         case 'revisionyear':
2438                                 return substr( wfRevisionTimestamp( $this->mRevisionId ), 0, 4 );
2439                         case 'revisiontimestamp':
2440                                 return wfRevisionTimestamp( $this->mRevisionId );
2441                         case 'namespace':
2442                                 return str_replace('_',' ',$wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2443                         case 'namespacee':
2444                                 return wfUrlencode( $wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2445                         case 'talkspace':
2446                                 return $this->mTitle->canTalk() ? str_replace('_',' ',$this->mTitle->getTalkNsText()) : '';
2447                         case 'talkspacee':
2448                                 return $this->mTitle->canTalk() ? wfUrlencode( $this->mTitle->getTalkNsText() ) : '';
2449                         case 'subjectspace':
2450                                 return $this->mTitle->getSubjectNsText();
2451                         case 'subjectspacee':
2452                                 return( wfUrlencode( $this->mTitle->getSubjectNsText() ) );
2453                         case 'currentdayname':
2454                                 return $varCache[$index] = $wgContLang->getWeekdayName( date( 'w', $ts ) + 1 );
2455                         case 'currentyear':
2456                                 return $varCache[$index] = $wgContLang->formatNum( date( 'Y', $ts ), true );
2457                         case 'currenttime':
2458                                 return $varCache[$index] = $wgContLang->time( wfTimestamp( TS_MW, $ts ), false, false );
2459                         case 'currenthour':
2460                                 return $varCache[$index] = $wgContLang->formatNum( date( 'H', $ts ), true );
2461                         case 'currentweek':
2462                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2463                                 // int to remove the padding
2464                                 return $varCache[$index] = $wgContLang->formatNum( (int)date( 'W', $ts ) );
2465                         case 'currentdow':
2466                                 return $varCache[$index] = $wgContLang->formatNum( date( 'w', $ts ) );
2467                         case 'localdayname':
2468                                 return $varCache[$index] = $wgContLang->getWeekdayName( $localDayOfWeek + 1 );
2469                         case 'localyear':
2470                                 return $varCache[$index] = $wgContLang->formatNum( $localYear, true );
2471                         case 'localtime':
2472                                 return $varCache[$index] = $wgContLang->time( $localTimestamp, false, false );
2473                         case 'localhour':
2474                                 return $varCache[$index] = $wgContLang->formatNum( $localHour, true );
2475                         case 'localweek':
2476                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2477                                 // int to remove the padding
2478                                 return $varCache[$index] = $wgContLang->formatNum( (int)$localWeek );
2479                         case 'localdow':
2480                                 return $varCache[$index] = $wgContLang->formatNum( $localDayOfWeek );
2481                         case 'numberofarticles':
2482                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfArticles() );
2483                         case 'numberoffiles':
2484                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfFiles() );
2485                         case 'numberofusers':
2486                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfUsers() );
2487                         case 'numberofpages':
2488                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfPages() );
2489                         case 'numberofadmins':
2490                                 return $varCache[$index]  = $wgContLang->formatNum( wfNumberOfAdmins() );
2491                         case 'currenttimestamp':
2492                                 return $varCache[$index] = wfTimestampNow();
2493                         case 'localtimestamp':
2494                                 return $varCache[$index] = $localTimestamp;
2495                         case 'currentversion':
2496                                 return $varCache[$index] = SpecialVersion::getVersion();
2497                         case 'sitename':
2498                                 return $wgSitename;
2499                         case 'server':
2500                                 return $wgServer;
2501                         case 'servername':
2502                                 return $wgServerName;
2503                         case 'scriptpath':
2504                                 return $wgScriptPath;
2505                         case 'directionmark':
2506                                 return $wgContLang->getDirMark();
2507                         case 'contentlanguage':
2508                                 global $wgContLanguageCode;
2509                                 return $wgContLanguageCode;
2510                         default:
2511                                 $ret = null;
2512                                 if ( wfRunHooks( 'ParserGetVariableValueSwitch', array( &$this, &$varCache, &$index, &$ret ) ) )
2513                                         return $ret;
2514                                 else
2515                                         return null;
2516                 }
2517         }
2518
2519         /**
2520          * initialise the magic variables (like CURRENTMONTHNAME)
2521          *
2522          * @private
2523          */
2524         function initialiseVariables() {
2525                 $fname = 'Parser::initialiseVariables';
2526                 wfProfileIn( $fname );
2527                 $variableIDs = MagicWord::getVariableIDs();
2528
2529                 $this->mVariables = array();
2530                 foreach ( $variableIDs as $id ) {
2531                         $mw =& MagicWord::get( $id );
2532                         $mw->addToArray( $this->mVariables, $id );
2533                 }
2534                 wfProfileOut( $fname );
2535         }
2536
2537         /**
2538          * parse any parentheses in format ((title|part|part))
2539          * and call callbacks to get a replacement text for any found piece
2540          *
2541          * @param string $text The text to parse
2542          * @param array $callbacks rules in form:
2543          *     '{' => array(                            # opening parentheses
2544          *                                      'end' => '}',   # closing parentheses
2545          *                                      'cb' => array(2 => callback,    # replacement callback to call if {{..}} is found
2546          *                                                                3 => callback         # replacement callback to call if {{{..}}} is found
2547          *                                                                )
2548          *                                      )
2549          *                                      'min' => 2,     # Minimum parenthesis count in cb
2550          *                                      'max' => 3,     # Maximum parenthesis count in cb
2551          * @private
2552          */
2553         function replace_callback ($text, $callbacks) {
2554                 wfProfileIn( __METHOD__ );
2555                 $openingBraceStack = array();   # this array will hold a stack of parentheses which are not closed yet
2556                 $lastOpeningBrace = -1;                 # last not closed parentheses
2557
2558                 $validOpeningBraces = implode( '', array_keys( $callbacks ) );
2559
2560                 $i = 0;
2561                 while ( $i < strlen( $text ) ) {
2562                         # Find next opening brace, closing brace or pipe
2563                         if ( $lastOpeningBrace == -1 ) {
2564                                 $currentClosing = '';
2565                                 $search = $validOpeningBraces;
2566                         } else {
2567                                 $currentClosing = $openingBraceStack[$lastOpeningBrace]['braceEnd'];
2568                                 $search = $validOpeningBraces . '|' . $currentClosing;
2569                         }
2570                         $rule = null;
2571                         $i += strcspn( $text, $search, $i );
2572                         if ( $i < strlen( $text ) ) {
2573                                 if ( $text[$i] == '|' ) {
2574                                         $found = 'pipe';
2575                                 } elseif ( $text[$i] == $currentClosing ) {
2576                                         $found = 'close';
2577                                 } elseif ( isset( $callbacks[$text[$i]] ) ) {
2578                                         $found = 'open';
2579                                         $rule = $callbacks[$text[$i]];
2580                                 } else {
2581                                         # Some versions of PHP have a strcspn which stops on null characters
2582                                         # Ignore and continue
2583                                         ++$i;
2584                                         continue;
2585                                 }
2586                         } else {
2587                                 # All done
2588                                 break;
2589                         }
2590
2591                         if ( $found == 'open' ) {
2592                                 # found opening brace, let's add it to parentheses stack
2593                                 $piece = array('brace' => $text[$i],
2594                                                            'braceEnd' => $rule['end'],
2595                                                            'title' => '',
2596                                                            'parts' => null);
2597
2598                                 # count opening brace characters
2599                                 $piece['count'] = strspn( $text, $piece['brace'], $i );
2600                                 $piece['startAt'] = $piece['partStart'] = $i + $piece['count'];
2601                                 $i += $piece['count'];
2602
2603                                 # we need to add to stack only if opening brace count is enough for one of the rules
2604                                 if ( $piece['count'] >= $rule['min'] ) {
2605                                         $lastOpeningBrace ++;
2606                                         $openingBraceStack[$lastOpeningBrace] = $piece;
2607                                 }
2608                         } elseif ( $found == 'close' ) {
2609                                 # lets check if it is enough characters for closing brace
2610                                 $maxCount = $openingBraceStack[$lastOpeningBrace]['count'];
2611                                 $count = strspn( $text, $text[$i], $i, $maxCount );
2612
2613                                 # check for maximum matching characters (if there are 5 closing
2614                                 # characters, we will probably need only 3 - depending on the rules)
2615                                 $matchingCount = 0;
2616                                 $matchingCallback = null;
2617                                 $cbType = $callbacks[$openingBraceStack[$lastOpeningBrace]['brace']];
2618                                 if ( $count > $cbType['max'] ) {
2619                                         # The specified maximum exists in the callback array, unless the caller
2620                                         # has made an error
2621                                         $matchingCount = $cbType['max'];
2622                                 } else {
2623                                         # Count is less than the maximum
2624                                         # Skip any gaps in the callback array to find the true largest match
2625                                         # Need to use array_key_exists not isset because the callback can be null
2626                                         $matchingCount = $count;
2627                                         while ( $matchingCount > 0 && !array_key_exists( $matchingCount, $cbType['cb'] ) ) {
2628                                                 --$matchingCount;
2629                                         }
2630                                 }
2631
2632                                 if ($matchingCount <= 0) {
2633                                         $i += $count;
2634                                         continue;
2635                                 }
2636                                 $matchingCallback = $cbType['cb'][$matchingCount];
2637
2638                                 # let's set a title or last part (if '|' was found)
2639                                 if (null === $openingBraceStack[$lastOpeningBrace]['parts']) {
2640                                         $openingBraceStack[$lastOpeningBrace]['title'] =
2641                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2642                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2643                                 } else {
2644                                         $openingBraceStack[$lastOpeningBrace]['parts'][] =
2645                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2646                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2647                                 }
2648
2649                                 $pieceStart = $openingBraceStack[$lastOpeningBrace]['startAt'] - $matchingCount;
2650                                 $pieceEnd = $i + $matchingCount;
2651
2652                                 if( is_callable( $matchingCallback ) ) {
2653                                         $cbArgs = array (
2654                                                                          'text' => substr($text, $pieceStart, $pieceEnd - $pieceStart),
2655                                                                          'title' => trim($openingBraceStack[$lastOpeningBrace]['title']),
2656                                                                          'parts' => $openingBraceStack[$lastOpeningBrace]['parts'],
2657                                                                          'lineStart' => (($pieceStart > 0) && ($text[$pieceStart-1] == "\n")),
2658                                                                          );
2659                                         # finally we can call a user callback and replace piece of text
2660                                         $replaceWith = call_user_func( $matchingCallback, $cbArgs );
2661                                         $text = substr($text, 0, $pieceStart) . $replaceWith . substr($text, $pieceEnd);
2662                                         $i = $pieceStart + strlen($replaceWith);
2663                                 } else {
2664                                         # null value for callback means that parentheses should be parsed, but not replaced
2665                                         $i += $matchingCount;
2666                                 }
2667
2668                                 # reset last opening parentheses, but keep it in case there are unused characters
2669                                 $piece = array('brace' => $openingBraceStack[$lastOpeningBrace]['brace'],
2670                                                            'braceEnd' => $openingBraceStack[$lastOpeningBrace]['braceEnd'],
2671                                                            'count' => $openingBraceStack[$lastOpeningBrace]['count'],
2672                                                            'title' => '',
2673                                                            'parts' => null,
2674                                                            'startAt' => $openingBraceStack[$lastOpeningBrace]['startAt']);
2675                                 $openingBraceStack[$lastOpeningBrace--] = null;
2676
2677                                 if ($matchingCount < $piece['count']) {
2678                                         $piece['count'] -= $matchingCount;
2679                                         $piece['startAt'] -= $matchingCount;
2680                                         $piece['partStart'] = $piece['startAt'];
2681                                         # do we still qualify for any callback with remaining count?
2682                                         $currentCbList = $callbacks[$piece['brace']]['cb'];
2683                                         while ( $piece['count'] ) {
2684                                                 if ( array_key_exists( $piece['count'], $currentCbList ) ) {
2685                                                         $lastOpeningBrace++;
2686                                                         $openingBraceStack[$lastOpeningBrace] = $piece;
2687                                                         break;
2688                                                 }
2689                                                 --$piece['count'];
2690                                         }
2691                                 }
2692                         } elseif ( $found == 'pipe' ) {
2693                                 # lets set a title if it is a first separator, or next part otherwise
2694                                 if (null === $openingBraceStack[$lastOpeningBrace]['parts']) {
2695                                         $openingBraceStack[$lastOpeningBrace]['title'] =
2696                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2697                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2698                                         $openingBraceStack[$lastOpeningBrace]['parts'] = array();
2699                                 } else {
2700                                         $openingBraceStack[$lastOpeningBrace]['parts'][] =
2701                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2702                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2703                                 }
2704                                 $openingBraceStack[$lastOpeningBrace]['partStart'] = ++$i;
2705                         }
2706                 }
2707
2708                 wfProfileOut( __METHOD__ );
2709                 return $text;
2710         }
2711
2712         /**
2713          * Replace magic variables, templates, and template arguments
2714          * with the appropriate text. Templates are substituted recursively,
2715          * taking care to avoid infinite loops.
2716          *
2717          * Note that the substitution depends on value of $mOutputType:
2718          *  OT_WIKI: only {{subst:}} templates
2719          *  OT_MSG: only magic variables
2720          *  OT_HTML: all templates and magic variables
2721          *
2722          * @param string $tex The text to transform
2723          * @param array $args Key-value pairs representing template parameters to substitute
2724          * @param bool $argsOnly Only do argument (triple-brace) expansion, not double-brace expansion
2725          * @private
2726          */
2727         function replaceVariables( $text, $args = array(), $argsOnly = false ) {
2728                 # Prevent too big inclusions
2729                 if( strlen( $text ) > $this->mOptions->getMaxIncludeSize() ) {
2730                         return $text;
2731                 }
2732
2733                 $fname = __METHOD__ /*. '-L' . count( $this->mArgStack )*/;
2734                 wfProfileIn( $fname );
2735
2736                 # This function is called recursively. To keep track of arguments we need a stack:
2737                 array_push( $this->mArgStack, $args );
2738
2739                 $braceCallbacks = array();
2740                 if ( !$argsOnly ) {
2741                         $braceCallbacks[2] = array( &$this, 'braceSubstitution' );
2742                 }
2743                 if ( $this->mOutputType != OT_MSG ) {
2744                         $braceCallbacks[3] = array( &$this, 'argSubstitution' );
2745                 }
2746                 if ( $braceCallbacks ) {
2747                         $callbacks = array(
2748                                 '{' => array(
2749                                         'end' => '}',
2750                                         'cb' => $braceCallbacks,
2751                                         'min' => $argsOnly ? 3 : 2,
2752                                         'max' => isset( $braceCallbacks[3] ) ? 3 : 2,
2753                                 ),
2754                                 '[' => array(
2755                                         'end' => ']',
2756                                         'cb' => array(2=>null),
2757                                         'min' => 2,
2758                                         'max' => 2,
2759                                 )
2760                         );
2761                         $text = $this->replace_callback ($text, $callbacks);
2762
2763                         array_pop( $this->mArgStack );
2764                 }
2765                 wfProfileOut( $fname );
2766                 return $text;
2767         }
2768
2769         /**
2770          * Replace magic variables
2771          * @private
2772          */
2773         function variableSubstitution( $matches ) {
2774                 global $wgContLang;
2775                 $fname = 'Parser::variableSubstitution';
2776                 $varname = $wgContLang->lc($matches[1]);
2777                 wfProfileIn( $fname );
2778                 $skip = false;
2779                 if ( $this->mOutputType == OT_WIKI ) {
2780                         # Do only magic variables prefixed by SUBST
2781                         $mwSubst =& MagicWord::get( 'subst' );
2782                         if (!$mwSubst->matchStartAndRemove( $varname ))
2783                                 $skip = true;
2784                         # Note that if we don't substitute the variable below,
2785                         # we don't remove the {{subst:}} magic word, in case
2786                         # it is a template rather than a magic variable.
2787                 }
2788                 if ( !$skip && array_key_exists( $varname, $this->mVariables ) ) {
2789                         $id = $this->mVariables[$varname];
2790                         # Now check if we did really match, case sensitive or not
2791                         $mw =& MagicWord::get( $id );
2792                         if ($mw->match($matches[1])) {
2793                                 $text = $this->getVariableValue( $id );
2794                                 $this->mOutput->mContainsOldMagic = true;
2795                         } else {
2796                                 $text = $matches[0];
2797                         }
2798                 } else {
2799                         $text = $matches[0];
2800                 }
2801                 wfProfileOut( $fname );
2802                 return $text;
2803         }
2804
2805         /**
2806          * Return the text of a template, after recursively
2807          * replacing any variables or templates within the template.
2808          *
2809          * @param array $piece The parts of the template
2810          *  $piece['text']: matched text
2811          *  $piece['title']: the title, i.e. the part before the |
2812          *  $piece['parts']: the parameter array
2813          * @return string the text of the template
2814          * @private
2815          */
2816         function braceSubstitution( $piece ) {
2817                 global $wgContLang, $wgLang, $wgAllowDisplayTitle;
2818                 $fname = __METHOD__ /*. '-L' . count( $this->mArgStack )*/;
2819                 wfProfileIn( $fname );
2820                 wfProfileIn( __METHOD__.'-setup' );
2821
2822                 # Flags
2823                 $found = false;             # $text has been filled
2824                 $nowiki = false;            # wiki markup in $text should be escaped
2825                 $noparse = false;           # Unsafe HTML tags should not be stripped, etc.
2826                 $noargs = false;            # Don't replace triple-brace arguments in $text
2827                 $replaceHeadings = false;   # Make the edit section links go to the template not the article
2828                 $isHTML = false;            # $text is HTML, armour it against wikitext transformation
2829                 $forceRawInterwiki = false; # Force interwiki transclusion to be done in raw mode not rendered
2830
2831                 # Title object, where $text came from
2832                 $title = NULL;
2833
2834                 $linestart = '';
2835
2836
2837                 # $part1 is the bit before the first |, and must contain only title characters
2838                 # $args is a list of arguments, starting from index 0, not including $part1
2839
2840                 $titleText = $part1 = $piece['title'];
2841                 # If the third subpattern matched anything, it will start with |
2842
2843                 if (null == $piece['parts']) {
2844                         $replaceWith = $this->variableSubstitution (array ($piece['text'], $piece['title']));
2845                         if ($replaceWith != $piece['text']) {
2846                                 $text = $replaceWith;
2847                                 $found = true;
2848                                 $noparse = true;
2849                                 $noargs = true;
2850                         }
2851                 }
2852
2853                 $args = (null == $piece['parts']) ? array() : $piece['parts'];
2854                 wfProfileOut( __METHOD__.'-setup' );
2855
2856                 # SUBST
2857                 wfProfileIn( __METHOD__.'-modifiers' );
2858                 if ( !$found ) {
2859                         $mwSubst =& MagicWord::get( 'subst' );
2860                         if ( $mwSubst->matchStartAndRemove( $part1 ) xor $this->ot['wiki'] ) {
2861                                 # One of two possibilities is true:
2862                                 # 1) Found SUBST but not in the PST phase
2863                                 # 2) Didn't find SUBST and in the PST phase
2864                                 # In either case, return without further processing
2865                                 $text = $piece['text'];
2866                                 $found = true;
2867                                 $noparse = true;
2868                                 $noargs = true;
2869                         }
2870                 }
2871
2872                 # MSG, MSGNW and RAW
2873                 if ( !$found ) {
2874                         # Check for MSGNW:
2875                         $mwMsgnw =& MagicWord::get( 'msgnw' );
2876                         if ( $mwMsgnw->matchStartAndRemove( $part1 ) ) {
2877                                 $nowiki = true;
2878                         } else {
2879                                 # Remove obsolete MSG:
2880                                 $mwMsg =& MagicWord::get( 'msg' );
2881                                 $mwMsg->matchStartAndRemove( $part1 );
2882                         }
2883
2884                         # Check for RAW:
2885                         $mwRaw =& MagicWord::get( 'raw' );
2886                         if ( $mwRaw->matchStartAndRemove( $part1 ) ) {
2887                                 $forceRawInterwiki = true;
2888                         }
2889                 }
2890                 wfProfileOut( __METHOD__.'-modifiers' );
2891
2892                 # Parser functions
2893                 if ( !$found ) {
2894                         wfProfileIn( __METHOD__ . '-pfunc' );
2895
2896                         $colonPos = strpos( $part1, ':' );
2897                         if ( $colonPos !== false ) {
2898                                 # Case sensitive functions
2899                                 $function = substr( $part1, 0, $colonPos );
2900                                 if ( isset( $this->mFunctionSynonyms[1][$function] ) ) {
2901                                         $function = $this->mFunctionSynonyms[1][$function];
2902                                 } else {
2903                                         # Case insensitive functions
2904                                         $function = strtolower( $function );
2905                                         if ( isset( $this->mFunctionSynonyms[0][$function] ) ) {
2906                                                 $function = $this->mFunctionSynonyms[0][$function];
2907                                         } else {
2908                                                 $function = false;
2909                                         }
2910                                 }
2911                                 if ( $function ) {
2912                                         $funcArgs = array_map( 'trim', $args );
2913                                         $funcArgs = array_merge( array( &$this, trim( substr( $part1, $colonPos + 1 ) ) ), $funcArgs );
2914                                         $result = call_user_func_array( $this->mFunctionHooks[$function], $funcArgs );
2915                                         $found = true;
2916
2917                                         // The text is usually already parsed, doesn't need triple-brace tags expanded, etc.
2918                                         //$noargs = true;
2919                                         //$noparse = true;
2920
2921                                         if ( is_array( $result ) ) {
2922                                                 if ( isset( $result[0] ) ) {
2923                                                         $text = $linestart . $result[0];
2924                                                         unset( $result[0] );
2925                                                 }
2926
2927                                                 // Extract flags into the local scope
2928                                                 // This allows callers to set flags such as nowiki, noparse, found, etc.
2929                                                 extract( $result );
2930                                         } else {
2931                                                 $text = $linestart . $result;
2932                                         }
2933                                 }
2934                         }
2935                         wfProfileOut( __METHOD__ . '-pfunc' );
2936                 }
2937
2938                 # Template table test
2939
2940                 # Did we encounter this template already? If yes, it is in the cache
2941                 # and we need to check for loops.
2942                 if ( !$found && isset( $this->mTemplates[$piece['title']] ) ) {
2943                         $found = true;
2944
2945                         # Infinite loop test
2946                         if ( isset( $this->mTemplatePath[$part1] ) ) {
2947                                 $noparse = true;
2948                                 $noargs = true;
2949                                 $found = true;
2950                                 $text = $linestart .
2951                                         "[[$part1]]<!-- WARNING: template loop detected -->";
2952                                 wfDebug( __METHOD__.": template loop broken at '$part1'\n" );
2953                         } else {
2954                                 # set $text to cached message.
2955                                 $text = $linestart . $this->mTemplates[$piece['title']];
2956                         }
2957                 }
2958
2959                 # Load from database
2960                 $lastPathLevel = $this->mTemplatePath;
2961                 if ( !$found ) {
2962                         wfProfileIn( __METHOD__ . '-loadtpl' );
2963                         $ns = NS_TEMPLATE;
2964                         # declaring $subpage directly in the function call
2965                         # does not work correctly with references and breaks
2966                         # {{/subpage}}-style inclusions
2967                         $subpage = '';
2968                         $part1 = $this->maybeDoSubpageLink( $part1, $subpage );
2969                         if ($subpage !== '') {
2970                                 $ns = $this->mTitle->getNamespace();
2971                         }
2972                         $title = Title::newFromText( $part1, $ns );
2973
2974
2975                         if ( !is_null( $title ) ) {
2976                                 $titleText = $title->getPrefixedText();
2977                                 $checkVariantLink = sizeof($wgContLang->getVariants())>1;
2978                                 # Check for language variants if the template is not found
2979                                 if($checkVariantLink && $title->getArticleID() == 0){
2980                                         $wgContLang->findVariantLink($part1, $title);
2981                                 }
2982
2983                                 if ( !$title->isExternal() ) {
2984                                         if ( $title->getNamespace() == NS_SPECIAL && $this->mOptions->getAllowSpecialInclusion() && $this->ot['html'] ) {
2985                                                 $text = SpecialPage::capturePath( $title );
2986                                                 if ( is_string( $text ) ) {
2987                                                         $found = true;
2988                                                         $noparse = true;
2989                                                         $noargs = true;
2990                                                         $isHTML = true;
2991                                                         $this->disableCache();
2992                                                 }
2993                                         } else {
2994                                                 $articleContent = $this->fetchTemplate( $title );
2995                                                 if ( $articleContent !== false ) {
2996                                                         $found = true;
2997                                                         $text = $articleContent;
2998                                                         $replaceHeadings = true;
2999                                                 }
3000                                         }
3001
3002                                         # If the title is valid but undisplayable, make a link to it
3003                                         if ( !$found && ( $this->ot['html'] || $this->ot['pre'] ) ) {
3004                                                 $text = "[[:$titleText]]";
3005                                                 $found = true;
3006                                         }
3007                                 } elseif ( $title->isTrans() ) {
3008                                         // Interwiki transclusion
3009                                         if ( $this->ot['html'] && !$forceRawInterwiki ) {
3010                                                 $text = $this->interwikiTransclude( $title, 'render' );
3011                                                 $isHTML = true;
3012                                                 $noparse = true;
3013                                         } else {
3014                                                 $text = $this->interwikiTransclude( $title, 'raw' );
3015                                                 $replaceHeadings = true;
3016                                         }
3017                                         $found = true;
3018                                 }
3019
3020                                 # Template cache array insertion
3021                                 # Use the original $piece['title'] not the mangled $part1, so that
3022                                 # modifiers such as RAW: produce separate cache entries
3023                                 if( $found ) {
3024                                         if( $isHTML ) {
3025                                                 // A special page; don't store it in the template cache.
3026                                         } else {
3027                                                 $this->mTemplates[$piece['title']] = $text;
3028                                         }
3029                                         $text = $linestart . $text;
3030                                 }
3031                         }
3032                         wfProfileOut( __METHOD__ . '-loadtpl' );
3033                 }
3034
3035                 if ( $found && !$this->incrementIncludeSize( 'pre-expand', strlen( $text ) ) ) {
3036                         # Error, oversize inclusion
3037                         $text = $linestart .
3038                                 "[[$titleText]]<!-- WARNING: template omitted, pre-expand include size too large -->";
3039                         $noparse = true;
3040                         $noargs = true;
3041                 }
3042
3043                 # Recursive parsing, escaping and link table handling
3044                 # Only for HTML output
3045                 if ( $nowiki && $found && ( $this->ot['html'] || $this->ot['pre'] ) ) {
3046                         $text = wfEscapeWikiText( $text );
3047                 } elseif ( !$this->ot['msg'] && $found ) {
3048                         if ( $noargs ) {
3049                                 $assocArgs = array();
3050                         } else {
3051                                 # Clean up argument array
3052                                 $assocArgs = array();
3053                                 $index = 1;
3054                                 foreach( $args as $arg ) {
3055                                         $eqpos = strpos( $arg, '=' );
3056                                         if ( $eqpos === false ) {
3057                                                 $assocArgs[$index++] = $arg;
3058                                         } else {
3059                                                 $name = trim( substr( $arg, 0, $eqpos ) );
3060                                                 $value = trim( substr( $arg, $eqpos+1 ) );
3061                                                 if ( $value === false ) {
3062                                                         $value = '';
3063                                                 }
3064                                                 if ( $name !== false ) {
3065                                                         $assocArgs[$name] = $value;
3066                                                 }
3067                                         }
3068                                 }
3069
3070                                 # Add a new element to the templace recursion path
3071                                 $this->mTemplatePath[$part1] = 1;
3072                         }
3073
3074                         if ( !$noparse ) {
3075                                 # If there are any <onlyinclude> tags, only include them
3076                                 if ( in_string( '<onlyinclude>', $text ) && in_string( '</onlyinclude>', $text ) ) {
3077                                         $m = array();
3078                                         preg_match_all( '/<onlyinclude>(.*?)\n?<\/onlyinclude>/s', $text, $m );
3079                                         $text = '';
3080                                         foreach ($m[1] as $piece)
3081                                                 $text .= $piece;
3082                                 }
3083                                 # Remove <noinclude> sections and <includeonly> tags
3084                                 $text = preg_replace( '/<noinclude>.*?<\/noinclude>/s', '', $text );
3085                                 $text = strtr( $text, array( '<includeonly>' => '' , '</includeonly>' => '' ) );
3086
3087                                 if( $this->ot['html'] || $this->ot['pre'] ) {
3088                                         # Strip <nowiki>, <pre>, etc.
3089                                         $text = $this->strip( $text, $this->mStripState );
3090                                         if ( $this->ot['html'] ) {
3091                                                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'replaceVariables' ), $assocArgs );
3092                                         } elseif ( $this->ot['pre'] && $this->mOptions->getRemoveComments() ) {
3093                                                 $text = Sanitizer::removeHTMLcomments( $text );
3094                                         }
3095                                 }
3096                                 $text = $this->replaceVariables( $text, $assocArgs );
3097
3098                                 # If the template begins with a table or block-level
3099                                 # element, it should be treated as beginning a new line.
3100                                 if (!$piece['lineStart'] && preg_match('/^({\\||:|;|#|\*)/', $text)) /*}*/{
3101                                         $text = "\n" . $text;
3102                                 }
3103                         } elseif ( !$noargs ) {
3104                                 # $noparse and !$noargs
3105                                 # Just replace the arguments, not any double-brace items
3106                                 # This is used for rendered interwiki transclusion
3107                                 $text = $this->replaceVariables( $text, $assocArgs, true );
3108                         }
3109                 }
3110                 # Prune lower levels off the recursion check path
3111                 $this->mTemplatePath = $lastPathLevel;
3112
3113                 if ( $found && !$this->incrementIncludeSize( 'post-expand', strlen( $text ) ) ) {
3114                         # Error, oversize inclusion
3115                         $text = $linestart .
3116                                 "[[$titleText]]<!-- WARNING: template omitted, post-expand include size too large -->";
3117                         $noparse = true;
3118                         $noargs = true;
3119                 }
3120
3121                 if ( !$found ) {
3122                         wfProfileOut( $fname );
3123                         return $piece['text'];
3124                 } else {
3125                         wfProfileIn( __METHOD__ . '-placeholders' );
3126                         if ( $isHTML ) {
3127                                 # Replace raw HTML by a placeholder
3128                                 # Add a blank line preceding, to prevent it from mucking up
3129                                 # immediately preceding headings
3130                                 $text = "\n\n" . $this->insertStripItem( $text, $this->mStripState );
3131                         } else {
3132                                 # replace ==section headers==
3133                                 # XXX this needs to go away once we have a better parser.
3134                                 if ( !$this->ot['wiki'] && !$this->ot['pre'] && $replaceHeadings ) {
3135                                         if( !is_null( $title ) )
3136                                                 $encodedname = base64_encode($title->getPrefixedDBkey());
3137                                         else
3138                                                 $encodedname = base64_encode("");
3139                                         $m = preg_split('/(^={1,6}.*?={1,6}\s*?$)/m', $text, -1,
3140                                                 PREG_SPLIT_DELIM_CAPTURE);
3141                                         $text = '';
3142                                         $nsec = 0;
3143                                         for( $i = 0; $i < count($m); $i += 2 ) {
3144                                                 $text .= $m[$i];
3145                                                 if (!isset($m[$i + 1]) || $m[$i + 1] == "") continue;
3146                                                 $hl = $m[$i + 1];
3147                                                 if( strstr($hl, "<!--MWTEMPLATESECTION") ) {
3148                                                         $text .= $hl;
3149                                                         continue;
3150                                                 }
3151                                                 $m2 = array();
3152                                                 preg_match('/^(={1,6})(.*?)(={1,6})\s*?$/m', $hl, $m2);
3153                                                 $text .= $m2[1] . $m2[2] . "<!--MWTEMPLATESECTION="
3154                                                         . $encodedname . "&" . base64_encode("$nsec") . "-->" . $m2[3];
3155
3156                                                 $nsec++;
3157                                         }
3158                                 }
3159                         }
3160                         wfProfileOut( __METHOD__ . '-placeholders' );
3161                 }
3162
3163                 # Prune lower levels off the recursion check path
3164                 $this->mTemplatePath = $lastPathLevel;
3165
3166                 if ( !$found ) {
3167                         wfProfileOut( $fname );
3168                         return $piece['text'];
3169                 } else {
3170                         wfProfileOut( $fname );
3171                         return $text;
3172                 }
3173         }
3174
3175         /**
3176          * Fetch the unparsed text of a template and register a reference to it.
3177          */
3178         function fetchTemplate( $title ) {
3179                 $text = false;
3180                 // Loop to fetch the article, with up to 1 redirect
3181                 for ( $i = 0; $i < 2 && is_object( $title ); $i++ ) {
3182                         $rev = Revision::newFromTitle( $title );
3183                         $this->mOutput->addTemplate( $title, $title->getArticleID() );
3184                         if ( !$rev ) {
3185                                 break;
3186                         }
3187                         $text = $rev->getText();
3188                         if ( $text === false ) {
3189                                 break;
3190                         }
3191                         // Redirect?
3192                         $title = Title::newFromRedirect( $text );
3193                 }
3194                 return $text;
3195         }
3196
3197         /**
3198          * Transclude an interwiki link.
3199          */
3200         function interwikiTransclude( $title, $action ) {
3201                 global $wgEnableScaryTranscluding, $wgCanonicalNamespaceNames;
3202
3203                 if (!$wgEnableScaryTranscluding)
3204                         return wfMsg('scarytranscludedisabled');
3205
3206                 // The namespace will actually only be 0 or 10, depending on whether there was a leading :
3207                 // But we'll handle it generally anyway
3208                 if ( $title->getNamespace() ) {
3209                         // Use the canonical namespace, which should work anywhere
3210                         $articleName = $wgCanonicalNamespaceNames[$title->getNamespace()] . ':' . $title->getDBkey();
3211                 } else {
3212                         $articleName = $title->getDBkey();
3213                 }
3214
3215                 $url = str_replace('$1', urlencode($articleName), Title::getInterwikiLink($title->getInterwiki()));
3216                 $url .= "?action=$action";
3217                 if (strlen($url) > 255)
3218                         return wfMsg('scarytranscludetoolong');
3219                 return $this->fetchScaryTemplateMaybeFromCache($url);
3220         }
3221
3222         function fetchScaryTemplateMaybeFromCache($url) {
3223                 global $wgTranscludeCacheExpiry;
3224                 $dbr =& wfGetDB(DB_SLAVE);
3225                 $obj = $dbr->selectRow('transcache', array('tc_time', 'tc_contents'),
3226                                 array('tc_url' => $url));
3227                 if ($obj) {
3228                         $time = $obj->tc_time;
3229                         $text = $obj->tc_contents;
3230                         if ($time && time() < $time + $wgTranscludeCacheExpiry ) {
3231                                 return $text;
3232                         }
3233                 }
3234
3235                 $text = Http::get($url);
3236                 if (!$text)
3237                         return wfMsg('scarytranscludefailed', $url);
3238
3239                 $dbw =& wfGetDB(DB_MASTER);
3240                 $dbw->replace('transcache', array('tc_url'), array(
3241                         'tc_url' => $url,
3242                         'tc_time' => time(),
3243                         'tc_contents' => $text));
3244                 return $text;
3245         }
3246
3247
3248         /**
3249          * Triple brace replacement -- used for template arguments
3250          * @private
3251          */
3252         function argSubstitution( $matches ) {
3253                 $arg = trim( $matches['title'] );
3254                 $text = $matches['text'];
3255                 $inputArgs = end( $this->mArgStack );
3256
3257                 if ( array_key_exists( $arg, $inputArgs ) ) {
3258                         $text = $inputArgs[$arg];
3259                 } else if (($this->mOutputType == OT_HTML || $this->mOutputType == OT_PREPROCESS ) &&
3260                 null != $matches['parts'] && count($matches['parts']) > 0) {
3261                         $text = $matches['parts'][0];
3262                 }
3263                 if ( !$this->incrementIncludeSize( 'arg', strlen( $text ) ) ) {
3264                         $text = $matches['text'] .
3265                                 '<!-- WARNING: argument omitted, expansion size too large -->';
3266                 }
3267
3268                 return $text;
3269         }
3270
3271         /**
3272          * Increment an include size counter
3273          *
3274          * @param string $type The type of expansion
3275          * @param integer $size The size of the text
3276          * @return boolean False if this inclusion would take it over the maximum, true otherwise
3277          */
3278         function incrementIncludeSize( $type, $size ) {
3279                 if ( $this->mIncludeSizes[$type] + $size > $this->mOptions->getMaxIncludeSize() ) {
3280                         return false;
3281                 } else {
3282                         $this->mIncludeSizes[$type] += $size;
3283                         return true;
3284                 }
3285         }
3286
3287         /**
3288          * Detect __NOGALLERY__ magic word and set a placeholder
3289          */
3290         function stripNoGallery( &$text ) {
3291                 # if the string __NOGALLERY__ (not case-sensitive) occurs in the HTML,
3292                 # do not add TOC
3293                 $mw = MagicWord::get( 'nogallery' );
3294                 $this->mOutput->mNoGallery = $mw->matchAndRemove( $text ) ;
3295         }
3296
3297         /**
3298          * Detect __TOC__ magic word and set a placeholder
3299          */
3300         function stripToc( $text ) {
3301                 # if the string __NOTOC__ (not case-sensitive) occurs in the HTML,
3302                 # do not add TOC
3303                 $mw = MagicWord::get( 'notoc' );
3304                 if( $mw->matchAndRemove( $text ) ) {
3305                         $this->mShowToc = false;
3306                 }
3307
3308                 $mw = MagicWord::get( 'toc' );
3309                 if( $mw->match( $text ) ) {
3310                         $this->mShowToc = true;
3311                         $this->mForceTocPosition = true;
3312
3313                         // Set a placeholder. At the end we'll fill it in with the TOC.
3314                         $text = $mw->replace( '<!--MWTOC-->', $text, 1 );
3315
3316                         // Only keep the first one.
3317                         $text = $mw->replace( '', $text );
3318                 }
3319                 return $text;
3320         }
3321
3322         /**
3323          * This function accomplishes several tasks:
3324          * 1) Auto-number headings if that option is enabled
3325          * 2) Add an [edit] link to sections for logged in users who have enabled the option
3326          * 3) Add a Table of contents on the top for users who have enabled the option
3327          * 4) Auto-anchor headings
3328          *
3329          * It loops through all headlines, collects the necessary data, then splits up the
3330          * string and re-inserts the newly formatted headlines.
3331          *
3332          * @param string $text
3333          * @param boolean $isMain
3334          * @private
3335          */
3336         function formatHeadings( $text, $isMain=true ) {
3337                 global $wgMaxTocLevel, $wgContLang;
3338
3339                 $doNumberHeadings = $this->mOptions->getNumberHeadings();
3340                 if( !$this->mTitle->userCanEdit() ) {
3341                         $showEditLink = 0;
3342                 } else {
3343                         $showEditLink = $this->mOptions->getEditSection();
3344                 }
3345
3346                 # Inhibit editsection links if requested in the page
3347                 $esw =& MagicWord::get( 'noeditsection' );
3348                 if( $esw->matchAndRemove( $text ) ) {
3349                         $showEditLink = 0;
3350                 }
3351
3352                 # Get all headlines for numbering them and adding funky stuff like [edit]
3353                 # links - this is for later, but we need the number of headlines right now
3354                 $matches = array();
3355                 $numMatches = preg_match_all( '/<H([1-6])(.*?'.'>)(.*?)<\/H[1-6] *>/i', $text, $matches );
3356
3357                 # if there are fewer than 4 headlines in the article, do not show TOC
3358                 # unless it's been explicitly enabled.
3359                 $enoughToc = $this->mShowToc &&
3360                         (($numMatches >= 4) || $this->mForceTocPosition);
3361
3362                 # Allow user to stipulate that a page should have a "new section"
3363                 # link added via __NEWSECTIONLINK__
3364                 $mw =& MagicWord::get( 'newsectionlink' );
3365                 if( $mw->matchAndRemove( $text ) )
3366                         $this->mOutput->setNewSection( true );
3367
3368                 # if the string __FORCETOC__ (not case-sensitive) occurs in the HTML,
3369                 # override above conditions and always show TOC above first header
3370                 $mw =& MagicWord::get( 'forcetoc' );
3371                 if ($mw->matchAndRemove( $text ) ) {
3372                         $this->mShowToc = true;
3373                         $enoughToc = true;
3374                 }
3375
3376                 # Never ever show TOC if no headers
3377                 if( $numMatches < 1 ) {
3378                         $enoughToc = false;
3379                 }
3380
3381                 # We need this to perform operations on the HTML
3382                 $sk =& $this->mOptions->getSkin();
3383
3384                 # headline counter
3385                 $headlineCount = 0;
3386                 $sectionCount = 0; # headlineCount excluding template sections
3387
3388                 # Ugh .. the TOC should have neat indentation levels which can be
3389                 # passed to the skin functions. These are determined here
3390                 $toc = '';
3391                 $full = '';
3392                 $head = array();
3393                 $sublevelCount = array();
3394                 $levelCount = array();
3395                 $toclevel = 0;
3396                 $level = 0;
3397                 $prevlevel = 0;
3398                 $toclevel = 0;
3399                 $prevtoclevel = 0;
3400
3401                 foreach( $matches[3] as $headline ) {
3402                         $istemplate = 0;
3403                         $templatetitle = '';
3404                         $templatesection = 0;
3405                         $numbering = '';
3406                         $mat = array();
3407                         if (preg_match("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", $headline, $mat)) {
3408                                 $istemplate = 1;
3409                                 $templatetitle = base64_decode($mat[1]);
3410                                 $templatesection = 1 + (int)base64_decode($mat[2]);
3411                                 $headline = preg_replace("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", "", $headline);
3412                         }
3413
3414                         if( $toclevel ) {
3415                                 $prevlevel = $level;
3416                                 $prevtoclevel = $toclevel;
3417                         }
3418                         $level = $matches[1][$headlineCount];
3419
3420                         if( $doNumberHeadings || $enoughToc ) {
3421
3422                                 if ( $level > $prevlevel ) {
3423                                         # Increase TOC level
3424                                         $toclevel++;
3425                                         $sublevelCount[$toclevel] = 0;
3426                                         if( $toclevel<$wgMaxTocLevel ) {
3427                                                 $toc .= $sk->tocIndent();
3428                                         }
3429                                 }
3430                                 elseif ( $level < $prevlevel && $toclevel > 1 ) {
3431                                         # Decrease TOC level, find level to jump to
3432
3433                                         if ( $toclevel == 2 && $level <= $levelCount[1] ) {
3434                                                 # Can only go down to level 1
3435                                                 $toclevel = 1;
3436                                         } else {
3437                                                 for ($i = $toclevel; $i > 0; $i--) {
3438                                                         if ( $levelCount[$i] == $level ) {
3439                                                                 # Found last matching level
3440                                                                 $toclevel = $i;
3441                                                                 break;
3442                                                         }
3443                                                         elseif ( $levelCount[$i] < $level ) {
3444                                                                 # Found first matching level below current level
3445                                                                 $toclevel = $i + 1;
3446                                                                 break;
3447                                                         }
3448                                                 }
3449                                         }
3450                                         if( $toclevel<$wgMaxTocLevel ) {
3451                                                 $toc .= $sk->tocUnindent( $prevtoclevel - $toclevel );
3452                                         }
3453                                 }
3454                                 else {
3455                                         # No change in level, end TOC line
3456                                         if( $toclevel<$wgMaxTocLevel ) {
3457                                                 $toc .= $sk->tocLineEnd();
3458                                         }
3459                                 }
3460
3461                                 $levelCount[$toclevel] = $level;
3462
3463                                 # count number of headlines for each level
3464                                 @$sublevelCount[$toclevel]++;
3465                                 $dot = 0;
3466                                 for( $i = 1; $i <= $toclevel; $i++ ) {
3467                                         if( !empty( $sublevelCount[$i] ) ) {
3468                                                 if( $dot ) {
3469                                                         $numbering .= '.';
3470                                                 }
3471                                                 $numbering .= $wgContLang->formatNum( $sublevelCount[$i] );
3472                                                 $dot = 1;
3473                                         }
3474                                 }
3475                         }
3476
3477                         # The canonized header is a version of the header text safe to use for links
3478                         # Avoid insertion of weird stuff like <math> by expanding the relevant sections
3479                         $canonized_headline = $this->unstrip( $headline, $this->mStripState );
3480                         $canonized_headline = $this->unstripNoWiki( $canonized_headline, $this->mStripState );
3481
3482                         # Remove link placeholders by the link text.
3483                         #     <!--LINK number-->
3484                         # turns into
3485                         #     link text with suffix
3486                         $canonized_headline = preg_replace( '/<!--LINK ([0-9]*)-->/e',
3487                                                             "\$this->mLinkHolders['texts'][\$1]",
3488                                                             $canonized_headline );
3489                         $canonized_headline = preg_replace( '/<!--IWLINK ([0-9]*)-->/e',
3490                                                             "\$this->mInterwikiLinkHolders['texts'][\$1]",
3491                                                             $canonized_headline );
3492
3493                         # strip out HTML
3494                         $canonized_headline = preg_replace( '/<.*?' . '>/','',$canonized_headline );
3495                         $tocline = trim( $canonized_headline );
3496                         # Save headline for section edit hint before it's escaped
3497                         $headline_hint = trim( $canonized_headline );
3498                         $canonized_headline = Sanitizer::escapeId( $tocline );
3499                         $refers[$headlineCount] = $canonized_headline;
3500
3501                         # count how many in assoc. array so we can track dupes in anchors
3502                         @$refers[$canonized_headline]++;
3503                         $refcount[$headlineCount]=$refers[$canonized_headline];
3504
3505                         # Don't number the heading if it is the only one (looks silly)
3506                         if( $doNumberHeadings && count( $matches[3] ) > 1) {
3507                                 # the two are different if the line contains a link
3508                                 $headline=$numbering . ' ' . $headline;
3509                         }
3510
3511                         # Create the anchor for linking from the TOC to the section
3512                         $anchor = $canonized_headline;
3513                         if($refcount[$headlineCount] > 1 ) {
3514                                 $anchor .= '_' . $refcount[$headlineCount];
3515                         }
3516                         if( $enoughToc && ( !isset($wgMaxTocLevel) || $toclevel<$wgMaxTocLevel ) ) {
3517                                 $toc .= $sk->tocLine($anchor, $tocline, $numbering, $toclevel);
3518                         }
3519                         if( $showEditLink && ( !$istemplate || $templatetitle !== "" ) ) {
3520                                 if ( empty( $head[$headlineCount] ) ) {
3521                                         $head[$headlineCount] = '';
3522                                 }
3523                                 if( $istemplate )
3524                                         $head[$headlineCount] .= $sk->editSectionLinkForOther($templatetitle, $templatesection);
3525                                 else
3526                                         $head[$headlineCount] .= $sk->editSectionLink($this->mTitle, $sectionCount+1, $headline_hint);
3527                         }
3528
3529                         # give headline the correct <h#> tag
3530                         @$head[$headlineCount] .= "<a name=\"$anchor\"></a><h".$level.$matches[2][$headlineCount] .$headline.'</h'.$level.'>';
3531
3532                         $headlineCount++;
3533                         if( !$istemplate )
3534                                 $sectionCount++;
3535                 }
3536
3537                 if( $enoughToc ) {
3538                         if( $toclevel<$wgMaxTocLevel ) {
3539                                 $toc .= $sk->tocUnindent( $toclevel - 1 );
3540                         }
3541                         $toc = $sk->tocList( $toc );
3542                 }
3543
3544                 # split up and insert constructed headlines
3545
3546                 $blocks = preg_split( '/<H[1-6].*?' . '>.*?<\/H[1-6]>/i', $text );
3547                 $i = 0;
3548
3549                 foreach( $blocks as $block ) {
3550                         if( $showEditLink && $headlineCount > 0 && $i == 0 && $block != "\n" ) {
3551                                 # This is the [edit] link that appears for the top block of text when
3552                                 # section editing is enabled
3553
3554                                 # Disabled because it broke block formatting
3555                                 # For example, a bullet point in the top line
3556                                 # $full .= $sk->editSectionLink(0);
3557                         }
3558                         $full .= $block;
3559                         if( $enoughToc && !$i && $isMain && !$this->mForceTocPosition ) {
3560                                 # Top anchor now in skin
3561                                 $full = $full.$toc;
3562                         }
3563
3564                         if( !empty( $head[$i] ) ) {
3565                                 $full .= $head[$i];
3566                         }
3567                         $i++;
3568                 }
3569                 if( $this->mForceTocPosition ) {
3570                         return str_replace( '<!--MWTOC-->', $toc, $full );
3571                 } else {
3572                         return $full;
3573                 }
3574         }
3575
3576         /**
3577          * Transform wiki markup when saving a page by doing \r\n -> \n
3578          * conversion, substitting signatures, {{subst:}} templates, etc.
3579          *
3580          * @param string $text the text to transform
3581          * @param Title &$title the Title object for the current article
3582          * @param User &$user the User object describing the current user
3583          * @param ParserOptions $options parsing options
3584          * @param bool $clearState whether to clear the parser state first
3585          * @return string the altered wiki markup
3586          * @public
3587          */
3588         function preSaveTransform( $text, &$title, $user, $options, $clearState = true ) {
3589                 $this->mOptions = $options;
3590                 $this->mTitle =& $title;
3591                 $this->setOutputType( OT_WIKI );
3592
3593                 if ( $clearState ) {
3594                         $this->clearState();
3595                 }
3596
3597                 $stripState = false;
3598                 $pairs = array(
3599                         "\r\n" => "\n",
3600                 );
3601                 $text = str_replace( array_keys( $pairs ), array_values( $pairs ), $text );
3602                 $text = $this->strip( $text, $stripState, true, array( 'gallery' ) );
3603                 $text = $this->pstPass2( $text, $stripState, $user );
3604                 $text = $this->unstrip( $text, $stripState );
3605                 $text = $this->unstripNoWiki( $text, $stripState );
3606                 return $text;
3607         }
3608
3609         /**
3610          * Pre-save transform helper function
3611          * @private
3612          */
3613         function pstPass2( $text, &$stripState, $user ) {
3614                 global $wgContLang, $wgLocaltimezone;
3615
3616                 /* Note: This is the timestamp saved as hardcoded wikitext to
3617                  * the database, we use $wgContLang here in order to give
3618                  * everyone the same signature and use the default one rather
3619                  * than the one selected in each user's preferences.
3620                  */
3621                 if ( isset( $wgLocaltimezone ) ) {
3622                         $oldtz = getenv( 'TZ' );
3623                         putenv( 'TZ='.$wgLocaltimezone );
3624                 }
3625                 $d = $wgContLang->timeanddate( date( 'YmdHis' ), false, false) .
3626                   ' (' . date( 'T' ) . ')';
3627                 if ( isset( $wgLocaltimezone ) ) {
3628                         putenv( 'TZ='.$oldtz );
3629                 }
3630
3631                 # Variable replacement
3632                 # Because mOutputType is OT_WIKI, this will only process {{subst:xxx}} type tags
3633                 $text = $this->replaceVariables( $text );
3634
3635                 # Strip out <nowiki> etc. added via replaceVariables
3636                 $text = $this->strip( $text, $stripState, false, array( 'gallery' ) );
3637
3638                 # Signatures
3639                 $sigText = $this->getUserSig( $user );
3640                 $text = strtr( $text, array(
3641                         '~~~~~' => $d,
3642                         '~~~~' => "$sigText $d",
3643                         '~~~' => $sigText
3644                 ) );
3645
3646                 # Context links: [[|name]] and [[name (context)|]]
3647                 #
3648                 global $wgLegalTitleChars;
3649                 $tc = "[$wgLegalTitleChars]";
3650                 $nc = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
3651
3652                 $p1 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\))\\|]]/";            # [[ns:page (context)|]]
3653                 $p3 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\)|)(, $tc+|)\\|]]/";  # [[ns:page (context), context|]]
3654                 $p2 = "/\[\[\\|($tc+)]]/";                                      # [[|page]]
3655
3656                 # try $p1 first, to turn "[[A, B (C)|]]" into "[[A, B (C)|A, B]]"
3657                 $text = preg_replace( $p1, '[[\\1\\2\\3|\\2]]', $text );
3658                 $text = preg_replace( $p3, '[[\\1\\2\\3\\4|\\2]]', $text );
3659
3660                 $t = $this->mTitle->getText();
3661                 $m = array();
3662                 if ( preg_match( "/^($nc+:|)$tc+?( \\($tc+\\))$/", $t, $m ) ) {
3663                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
3664                 } elseif ( preg_match( "/^($nc+:|)$tc+?(, $tc+|)$/", $t, $m ) && '' != "$m[1]$m[2]" ) {
3665                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
3666                 } else {
3667                         # if there's no context, don't bother duplicating the title
3668                         $text = preg_replace( $p2, '[[\\1]]', $text );
3669                 }
3670
3671                 # Trim trailing whitespace
3672                 # __END__ tag allows for trailing
3673                 # whitespace to be deliberately included
3674                 $text = rtrim( $text );
3675                 $mw =& MagicWord::get( 'end' );
3676                 $mw->matchAndRemove( $text );
3677
3678                 return $text;
3679         }
3680
3681         /**
3682          * Fetch the user's signature text, if any, and normalize to
3683          * validated, ready-to-insert wikitext.
3684          *
3685          * @param User $user
3686          * @return string
3687          * @private
3688          */
3689         function getUserSig( &$user ) {
3690                 $username = $user->getName();
3691                 $nickname = $user->getOption( 'nickname' );
3692                 $nickname = $nickname === '' ? $username : $nickname;
3693
3694                 if( $user->getBoolOption( 'fancysig' ) !== false ) {
3695                         # Sig. might contain markup; validate this
3696                         if( $this->validateSig( $nickname ) !== false ) {
3697                                 # Validated; clean up (if needed) and return it
3698                                 return $this->cleanSig( $nickname, true );
3699                         } else {
3700                                 # Failed to validate; fall back to the default
3701                                 $nickname = $username;
3702                                 wfDebug( "Parser::getUserSig: $username has bad XML tags in signature.\n" );
3703                         }
3704                 }
3705
3706                 // Make sure nickname doesnt get a sig in a sig
3707                 $nickname = $this->cleanSigInSig( $nickname );
3708
3709                 # If we're still here, make it a link to the user page
3710                 $userpage = $user->getUserPage();
3711                 return( '[[' . $userpage->getPrefixedText() . '|' . wfEscapeWikiText( $nickname ) . ']]' );
3712         }
3713
3714         /**
3715          * Check that the user's signature contains no bad XML
3716          *
3717          * @param string $text
3718          * @return mixed An expanded string, or false if invalid.
3719          */
3720         function validateSig( $text ) {
3721                 return( wfIsWellFormedXmlFragment( $text ) ? $text : false );
3722         }
3723
3724         /**
3725          * Clean up signature text
3726          *
3727          * 1) Strip ~~~, ~~~~ and ~~~~~ out of signatures @see cleanSigInSig
3728          * 2) Substitute all transclusions
3729          *
3730          * @param string $text
3731          * @param $parsing Whether we're cleaning (preferences save) or parsing
3732          * @return string Signature text
3733          */
3734         function cleanSig( $text, $parsing = false ) {
3735                 global $wgTitle;
3736                 $this->startExternalParse( $wgTitle, new ParserOptions(), $parsing ? OT_WIKI : OT_MSG );
3737
3738                 $substWord = MagicWord::get( 'subst' );
3739                 $substRegex = '/\{\{(?!(?:' . $substWord->getBaseRegex() . '))/x' . $substWord->getRegexCase();
3740                 $substText = '{{' . $substWord->getSynonym( 0 );
3741
3742                 $text = preg_replace( $substRegex, $substText, $text );
3743                 $text = $this->cleanSigInSig( $text );
3744                 $text = $this->replaceVariables( $text );
3745
3746                 $this->clearState();
3747                 return $text;
3748         }
3749
3750         /**
3751          * Strip ~~~, ~~~~ and ~~~~~ out of signatures
3752          * @param string $text
3753          * @return string Signature text with /~{3,5}/ removed
3754          */
3755         function cleanSigInSig( $text ) {
3756                 $text = preg_replace( '/~{3,5}/', '', $text );
3757                 return $text;
3758         }
3759
3760         /**
3761          * Set up some variables which are usually set up in parse()
3762          * so that an external function can call some class members with confidence
3763          * @public
3764          */
3765         function startExternalParse( &$title, $options, $outputType, $clearState = true ) {
3766                 $this->mTitle =& $title;
3767                 $this->mOptions = $options;
3768                 $this->setOutputType( $outputType );
3769                 if ( $clearState ) {
3770                         $this->clearState();
3771                 }
3772         }
3773
3774         /**
3775          * Transform a MediaWiki message by replacing magic variables.
3776          *
3777          * @param string $text the text to transform
3778          * @param ParserOptions $options  options
3779          * @return string the text with variables substituted
3780          * @public
3781          */
3782         function transformMsg( $text, $options ) {
3783                 global $wgTitle;
3784                 static $executing = false;
3785
3786                 $fname = "Parser::transformMsg";
3787
3788                 # Guard against infinite recursion
3789                 if ( $executing ) {
3790                         return $text;
3791                 }
3792                 $executing = true;
3793
3794                 wfProfileIn($fname);
3795
3796                 if ( $wgTitle ) {
3797                         $this->mTitle = $wgTitle;
3798                 } else {
3799                         $this->mTitle = Title::newFromText('msg');
3800                 }
3801                 $this->mOptions = $options;
3802                 $this->setOutputType( OT_MSG );
3803                 $this->clearState();
3804                 $text = $this->replaceVariables( $text );
3805
3806                 $executing = false;
3807                 wfProfileOut($fname);
3808                 return $text;
3809         }
3810
3811         /**
3812          * Create an HTML-style tag, e.g. <yourtag>special text</yourtag>
3813          * The callback should have the following form:
3814          *    function myParserHook( $text, $params, &$parser ) { ... }
3815          *
3816          * Transform and return $text. Use $parser for any required context, e.g. use
3817          * $parser->getTitle() and $parser->getOptions() not $wgTitle or $wgOut->mParserOptions
3818          *
3819          * @public
3820          *
3821          * @param mixed $tag The tag to use, e.g. 'hook' for <hook>
3822          * @param mixed $callback The callback function (and object) to use for the tag
3823          *
3824          * @return The old value of the mTagHooks array associated with the hook
3825          */
3826         function setHook( $tag, $callback ) {
3827                 $tag = strtolower( $tag );
3828                 $oldVal = @$this->mTagHooks[$tag];
3829                 $this->mTagHooks[$tag] = $callback;
3830
3831                 return $oldVal;
3832         }
3833
3834         /**
3835          * Create a function, e.g. {{sum:1|2|3}}
3836          * The callback function should have the form:
3837          *    function myParserFunction( &$parser, $arg1, $arg2, $arg3 ) { ... }
3838          *
3839          * The callback may either return the text result of the function, or an array with the text
3840          * in element 0, and a number of flags in the other elements. The names of the flags are
3841          * specified in the keys. Valid flags are:
3842          *   found                     The text returned is valid, stop processing the template. This
3843          *                             is on by default.
3844          *   nowiki                    Wiki markup in the return value should be escaped
3845          *   noparse                   Unsafe HTML tags should not be stripped, etc.
3846          *   noargs                    Don't replace triple-brace arguments in the return value
3847          *   isHTML                    The returned text is HTML, armour it against wikitext transformation
3848          *
3849          * @public
3850          *
3851          * @param string $id The magic word ID
3852          * @param mixed $callback The callback function (and object) to use
3853          * @param integer $flags a combination of the following flags:
3854          *                SFH_NO_HASH No leading hash, i.e. {{plural:...}} instead of {{#if:...}}
3855          *
3856          * @return The old callback function for this name, if any
3857          */
3858         function setFunctionHook( $id, $callback, $flags = 0 ) {
3859                 $oldVal = @$this->mFunctionHooks[$id];
3860                 $this->mFunctionHooks[$id] = $callback;
3861
3862                 # Add to function cache
3863                 $mw = MagicWord::get( $id );
3864                 if( !$mw )
3865                         throw new MWException( 'Parser::setFunctionHook() expecting a magic word identifier.' );
3866
3867                 $synonyms = $mw->getSynonyms();
3868                 $sensitive = intval( $mw->isCaseSensitive() );
3869
3870                 foreach ( $synonyms as $syn ) {
3871                         # Case
3872                         if ( !$sensitive ) {
3873                                 $syn = strtolower( $syn );
3874                         }
3875                         # Add leading hash
3876                         if ( !( $flags & SFH_NO_HASH ) ) {
3877                                 $syn = '#' . $syn;
3878                         }
3879                         # Remove trailing colon
3880                         if ( substr( $syn, -1, 1 ) == ':' ) {
3881                                 $syn = substr( $syn, 0, -1 );
3882                         }
3883                         $this->mFunctionSynonyms[$sensitive][$syn] = $id;
3884                 }
3885                 return $oldVal;
3886         }
3887
3888         /**
3889          * Get all registered function hook identifiers
3890          *
3891          * @return array
3892          */
3893         function getFunctionHooks() {
3894                 return array_keys( $this->mFunctionHooks );
3895         }
3896
3897         /**
3898          * Replace <!--LINK--> link placeholders with actual links, in the buffer
3899          * Placeholders created in Skin::makeLinkObj()
3900          * Returns an array of links found, indexed by PDBK:
3901          *  0 - broken
3902          *  1 - normal link
3903          *  2 - stub
3904          * $options is a bit field, RLH_FOR_UPDATE to select for update
3905          */
3906         function replaceLinkHolders( &$text, $options = 0 ) {
3907                 global $wgUser;
3908                 global $wgOutputReplace;
3909                 global $wgContLang;
3910
3911                 $fname = 'Parser::replaceLinkHolders';
3912                 wfProfileIn( $fname );
3913
3914                 $pdbks = array();
3915                 $colours = array();
3916                 $sk =& $this->mOptions->getSkin();
3917                 $linkCache =& LinkCache::singleton();
3918
3919                 if ( !empty( $this->mLinkHolders['namespaces'] ) ) {
3920                         wfProfileIn( $fname.'-check' );
3921                         $dbr =& wfGetDB( DB_SLAVE );
3922                         $page = $dbr->tableName( 'page' );
3923                         $threshold = $wgUser->getOption('stubthreshold');
3924
3925                         # Sort by namespace
3926                         asort( $this->mLinkHolders['namespaces'] );
3927
3928                         # Generate query
3929                         $query = false;
3930                         $current = null;
3931                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
3932                                 # Make title object
3933                                 $title = $this->mLinkHolders['titles'][$key];
3934
3935                                 # Skip invalid entries.
3936                                 # Result will be ugly, but prevents crash.
3937                                 if ( is_null( $title ) ) {
3938                                         continue;
3939                                 }
3940                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
3941
3942                                 # Check if it's a static known link, e.g. interwiki
3943                                 if ( $title->isAlwaysKnown() ) {
3944                                         $colours[$pdbk] = 1;
3945                                 } elseif ( ( $id = $linkCache->getGoodLinkID( $pdbk ) ) != 0 ) {
3946                                         $colours[$pdbk] = 1;
3947                                         $this->mOutput->addLink( $title, $id );
3948                                 } elseif ( $linkCache->isBadLink( $pdbk ) ) {
3949                                         $colours[$pdbk] = 0;
3950                                 } else {
3951                                         # Not in the link cache, add it to the query
3952                                         if ( !isset( $current ) ) {
3953                                                 $current = $ns;
3954                                                 $query =  "SELECT page_id, page_namespace, page_title";
3955                                                 if ( $threshold > 0 ) {
3956                                                         $query .= ', page_len, page_is_redirect';
3957                                                 }
3958                                                 $query .= " FROM $page WHERE (page_namespace=$ns AND page_title IN(";
3959                                         } elseif ( $current != $ns ) {
3960                                                 $current = $ns;
3961                                                 $query .= ")) OR (page_namespace=$ns AND page_title IN(";
3962                                         } else {
3963                                                 $query .= ', ';
3964                                         }
3965
3966                                         $query .= $dbr->addQuotes( $this->mLinkHolders['dbkeys'][$key] );
3967                                 }
3968                         }
3969                         if ( $query ) {
3970                                 $query .= '))';
3971                                 if ( $options & RLH_FOR_UPDATE ) {
3972                                         $query .= ' FOR UPDATE';
3973                                 }
3974
3975                                 $res = $dbr->query( $query, $fname );
3976
3977                                 # Fetch data and form into an associative array
3978                                 # non-existent = broken
3979                                 # 1 = known
3980                                 # 2 = stub
3981                                 while ( $s = $dbr->fetchObject($res) ) {
3982                                         $title = Title::makeTitle( $s->page_namespace, $s->page_title );
3983                                         $pdbk = $title->getPrefixedDBkey();
3984                                         $linkCache->addGoodLinkObj( $s->page_id, $title );
3985                                         $this->mOutput->addLink( $title, $s->page_id );
3986
3987                                         if ( $threshold >  0 ) {
3988                                                 $size = $s->page_len;
3989                                                 if ( $s->page_is_redirect || $s->page_namespace != 0 || $size >= $threshold ) {
3990                                                         $colours[$pdbk] = 1;
3991                                                 } else {
3992                                                         $colours[$pdbk] = 2;
3993                                                 }
3994                                         } else {
3995                                                 $colours[$pdbk] = 1;
3996                                         }
3997                                 }
3998                         }
3999                         wfProfileOut( $fname.'-check' );
4000
4001                         # Do a second query for different language variants of links (if needed)
4002                         if($wgContLang->hasVariants()){
4003                                 $linkBatch = new LinkBatch();
4004                                 $variantMap = array(); // maps $pdbkey_Variant => $pdbkey_original
4005
4006                                 // Add variants of links to link batch
4007                                 foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
4008                                         $title = $this->mLinkHolders['titles'][$key];
4009                                         if ( is_null( $title ) )
4010                                                 continue;
4011
4012                                         $pdbk = $title->getPrefixedDBkey();
4013
4014                                         // generate all variants of the link title text
4015                                         $allTextVariants = $wgContLang->convertLinkToAllVariants($title->getText());
4016
4017                                         // if link was not found (in first query), add all variants to query
4018                                         if ( !isset($colours[$pdbk]) ){
4019                                                 foreach($allTextVariants as $textVariant){
4020                                                         $variantTitle = Title::makeTitle( $ns, $textVariant );
4021                                                         if(is_null($variantTitle)) continue;
4022                                                         $linkBatch->addObj( $variantTitle );
4023                                                         $variantMap[$variantTitle->getPrefixedDBkey()][] = $key;
4024                                                 }
4025                                         }
4026                                 }
4027
4028
4029                                 if(!$linkBatch->isEmpty()){
4030                                         // construct query
4031                                         $titleClause = $linkBatch->constructSet('page', $dbr);
4032
4033                                         $variantQuery =  "SELECT page_id, page_namespace, page_title";
4034                                         if ( $threshold > 0 ) {
4035                                                 $variantQuery .= ', page_len, page_is_redirect';
4036                                         }
4037
4038                                         $variantQuery .= " FROM $page WHERE $titleClause";
4039                                         if ( $options & RLH_FOR_UPDATE ) {
4040                                                 $variantQuery .= ' FOR UPDATE';
4041                                         }
4042
4043                                         $varRes = $dbr->query( $variantQuery, $fname );
4044
4045                                         // for each found variants, figure out link holders and replace
4046                                         while ( $s = $dbr->fetchObject($varRes) ) {
4047
4048                                                 $variantTitle = Title::makeTitle( $s->page_namespace, $s->page_title );
4049                                                 $varPdbk = $variantTitle->getPrefixedDBkey();
4050                                                 $linkCache->addGoodLinkObj( $s->page_id, $variantTitle );
4051                                                 $this->mOutput->addLink( $variantTitle, $s->page_id );
4052
4053                                                 $holderKeys = $variantMap[$varPdbk];
4054
4055                                                 // loop over link holders
4056                                                 foreach($holderKeys as $key){
4057                                                         $title = $this->mLinkHolders['titles'][$key];
4058                                                         if ( is_null( $title ) ) continue;
4059
4060                                                         $pdbk = $title->getPrefixedDBkey();
4061
4062                                                         if(!isset($colours[$pdbk])){
4063                                                                 // found link in some of the variants, replace the link holder data
4064                                                                 $this->mLinkHolders['titles'][$key] = $variantTitle;
4065                                                                 $this->mLinkHolders['dbkeys'][$key] = $variantTitle->getDBkey();
4066
4067                                                                 // set pdbk and colour
4068                                                                 $pdbks[$key] = $varPdbk;
4069                                                                 if ( $threshold >  0 ) {
4070                                                                         $size = $s->page_len;
4071                                                                         if ( $s->page_is_redirect || $s->page_namespace != 0 || $size >= $threshold ) {
4072                                                                                 $colours[$varPdbk] = 1;
4073                                                                         } else {
4074                                                                                 $colours[$varPdbk] = 2;
4075                                                                         }
4076                                                                 }
4077                                                                 else {
4078                                                                         $colours[$varPdbk] = 1;
4079                                                                 }
4080                                                         }
4081                                                 }
4082                                         }
4083                                 }
4084                         }
4085
4086                         # Construct search and replace arrays
4087                         wfProfileIn( $fname.'-construct' );
4088                         $wgOutputReplace = array();
4089                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
4090                                 $pdbk = $pdbks[$key];
4091                                 $searchkey = "<!--LINK $key-->";
4092                                 $title = $this->mLinkHolders['titles'][$key];
4093                                 if ( empty( $colours[$pdbk] ) ) {
4094                                         $linkCache->addBadLinkObj( $title );
4095                                         $colours[$pdbk] = 0;
4096                                         $this->mOutput->addLink( $title, 0 );
4097                                         $wgOutputReplace[$searchkey] = $sk->makeBrokenLinkObj( $title,
4098                                                                         $this->mLinkHolders['texts'][$key],
4099                                                                         $this->mLinkHolders['queries'][$key] );
4100                                 } elseif ( $colours[$pdbk] == 1 ) {
4101                                         $wgOutputReplace[$searchkey] = $sk->makeKnownLinkObj( $title,
4102                                                                         $this->mLinkHolders['texts'][$key],
4103                                                                         $this->mLinkHolders['queries'][$key] );
4104                                 } elseif ( $colours[$pdbk] == 2 ) {
4105                                         $wgOutputReplace[$searchkey] = $sk->makeStubLinkObj( $title,
4106                                                                         $this->mLinkHolders['texts'][$key],
4107                                                                         $this->mLinkHolders['queries'][$key] );
4108                                 }
4109                         }
4110                         wfProfileOut( $fname.'-construct' );
4111
4112                         # Do the thing
4113                         wfProfileIn( $fname.'-replace' );
4114
4115                         $text = preg_replace_callback(
4116                                 '/(<!--LINK .*?-->)/',
4117                                 "wfOutputReplaceMatches",
4118                                 $text);
4119
4120                         wfProfileOut( $fname.'-replace' );
4121                 }
4122
4123                 # Now process interwiki link holders
4124                 # This is quite a bit simpler than internal links
4125                 if ( !empty( $this->mInterwikiLinkHolders['texts'] ) ) {
4126                         wfProfileIn( $fname.'-interwiki' );
4127                         # Make interwiki link HTML
4128                         $wgOutputReplace = array();
4129                         foreach( $this->mInterwikiLinkHolders['texts'] as $key => $link ) {
4130                                 $title = $this->mInterwikiLinkHolders['titles'][$key];
4131                                 $wgOutputReplace[$key] = $sk->makeLinkObj( $title, $link );
4132                         }
4133
4134                         $text = preg_replace_callback(
4135                                 '/<!--IWLINK (.*?)-->/',
4136                                 "wfOutputReplaceMatches",
4137                                 $text );
4138                         wfProfileOut( $fname.'-interwiki' );
4139                 }
4140
4141                 wfProfileOut( $fname );
4142                 return $colours;
4143         }
4144
4145         /**
4146          * Replace <!--LINK--> link placeholders with plain text of links
4147          * (not HTML-formatted).
4148          * @param string $text
4149          * @return string
4150          */
4151         function replaceLinkHoldersText( $text ) {
4152                 $fname = 'Parser::replaceLinkHoldersText';
4153                 wfProfileIn( $fname );
4154
4155                 $text = preg_replace_callback(
4156                         '/<!--(LINK|IWLINK) (.*?)-->/',
4157                         array( &$this, 'replaceLinkHoldersTextCallback' ),
4158                         $text );
4159
4160                 wfProfileOut( $fname );
4161                 return $text;
4162         }
4163
4164         /**
4165          * @param array $matches
4166          * @return string
4167          * @private
4168          */
4169         function replaceLinkHoldersTextCallback( $matches ) {
4170                 $type = $matches[1];
4171                 $key  = $matches[2];
4172                 if( $type == 'LINK' ) {
4173                         if( isset( $this->mLinkHolders['texts'][$key] ) ) {
4174                                 return $this->mLinkHolders['texts'][$key];
4175                         }
4176                 } elseif( $type == 'IWLINK' ) {
4177                         if( isset( $this->mInterwikiLinkHolders['texts'][$key] ) ) {
4178                                 return $this->mInterwikiLinkHolders['texts'][$key];
4179                         }
4180                 }
4181                 return $matches[0];
4182         }
4183
4184         /**
4185          * Tag hook handler for 'pre'.
4186          */
4187         function renderPreTag( $text, $attribs ) {
4188                 // Backwards-compatibility hack
4189                 $content = preg_replace( '!<nowiki>(.*?)</nowiki>!is', '\\1', $text );
4190
4191                 $attribs = Sanitizer::validateTagAttributes( $attribs, 'pre' );
4192                 return wfOpenElement( 'pre', $attribs ) .
4193                         wfEscapeHTMLTagsOnly( $content ) .
4194                         '</pre>';
4195         }
4196
4197         /**
4198          * Renders an image gallery from a text with one line per image.
4199          * text labels may be given by using |-style alternative text. E.g.
4200          *   Image:one.jpg|The number "1"
4201          *   Image:tree.jpg|A tree
4202          * given as text will return the HTML of a gallery with two images,
4203          * labeled 'The number "1"' and
4204          * 'A tree'.
4205          */
4206         function renderImageGallery( $text, $params ) {
4207                 $ig = new ImageGallery();
4208                 $ig->setShowBytes( false );
4209                 $ig->setShowFilename( false );
4210                 $ig->setParsing();
4211                 $ig->useSkin( $this->mOptions->getSkin() );
4212
4213                 if( isset( $params['caption'] ) )
4214                         $ig->setCaption( $params['caption'] );
4215
4216                 $lines = explode( "\n", $text );
4217                 foreach ( $lines as $line ) {
4218                         # match lines like these:
4219                         # Image:someimage.jpg|This is some image
4220                         $matches = array();
4221                         preg_match( "/^([^|]+)(\\|(.*))?$/", $line, $matches );
4222                         # Skip empty lines
4223                         if ( count( $matches ) == 0 ) {
4224                                 continue;
4225                         }
4226                         $tp = Title::newFromText( $matches[1] );
4227                         $nt =& $tp;
4228                         if( is_null( $nt ) ) {
4229                                 # Bogus title. Ignore these so we don't bomb out later.
4230                                 continue;
4231                         }
4232                         if ( isset( $matches[3] ) ) {
4233                                 $label = $matches[3];
4234                         } else {
4235                                 $label = '';
4236                         }
4237
4238                         $pout = $this->parse( $label,
4239                                 $this->mTitle,
4240                                 $this->mOptions,
4241                                 false, // Strip whitespace...?
4242                                 false  // Don't clear state!
4243                         );
4244                         $html = $pout->getText();
4245
4246                         $ig->add( new Image( $nt ), $html );
4247
4248                         # Only add real images (bug #5586)
4249                         if ( $nt->getNamespace() == NS_IMAGE ) {
4250                                 $this->mOutput->addImage( $nt->getDBkey() );
4251                         }
4252                 }
4253                 return $ig->toHTML();
4254         }
4255
4256         /**
4257          * Parse image options text and use it to make an image
4258          */
4259         function makeImage( $nt, $options ) {
4260                 global $wgUseImageResize, $wgDjvuRenderer;
4261
4262                 $align = '';
4263
4264                 # Check if the options text is of the form "options|alt text"
4265                 # Options are:
4266                 #  * thumbnail          make a thumbnail with enlarge-icon and caption, alignment depends on lang
4267                 #  * left               no resizing, just left align. label is used for alt= only
4268                 #  * right              same, but right aligned
4269                 #  * none               same, but not aligned
4270                 #  * ___px              scale to ___ pixels width, no aligning. e.g. use in taxobox
4271                 #  * center             center the image
4272                 #  * framed             Keep original image size, no magnify-button.
4273
4274                 $part = explode( '|', $options);
4275
4276                 $mwThumb  =& MagicWord::get( 'img_thumbnail' );
4277                 $mwManualThumb =& MagicWord::get( 'img_manualthumb' );
4278                 $mwLeft   =& MagicWord::get( 'img_left' );
4279                 $mwRight  =& MagicWord::get( 'img_right' );
4280                 $mwNone   =& MagicWord::get( 'img_none' );
4281                 $mwWidth  =& MagicWord::get( 'img_width' );
4282                 $mwCenter =& MagicWord::get( 'img_center' );
4283                 $mwFramed =& MagicWord::get( 'img_framed' );
4284                 $mwPage   =& MagicWord::get( 'img_page' );
4285                 $caption = '';
4286
4287                 $width = $height = $framed = $thumb = false;
4288                 $page = null;
4289                 $manual_thumb = '' ;
4290
4291                 foreach( $part as $val ) {
4292                         if ( $wgUseImageResize && ! is_null( $mwThumb->matchVariableStartToEnd($val) ) ) {
4293                                 $thumb=true;
4294                         } elseif ( ! is_null( $match = $mwManualThumb->matchVariableStartToEnd($val) ) ) {
4295                                 # use manually specified thumbnail
4296                                 $thumb=true;
4297                                 $manual_thumb = $match;
4298                         } elseif ( ! is_null( $mwRight->matchVariableStartToEnd($val) ) ) {
4299                                 # remember to set an alignment, don't render immediately
4300                                 $align = 'right';
4301                         } elseif ( ! is_null( $mwLeft->matchVariableStartToEnd($val) ) ) {
4302                                 # remember to set an alignment, don't render immediately
4303                                 $align = 'left';
4304                         } elseif ( ! is_null( $mwCenter->matchVariableStartToEnd($val) ) ) {
4305                                 # remember to set an alignment, don't render immediately
4306                                 $align = 'center';
4307                         } elseif ( ! is_null( $mwNone->matchVariableStartToEnd($val) ) ) {
4308                                 # remember to set an alignment, don't render immediately
4309                                 $align = 'none';
4310                         } elseif ( isset( $wgDjvuRenderer ) && $wgDjvuRenderer
4311                                    && ! is_null( $match = $mwPage->matchVariableStartToEnd($val) ) ) {
4312                                 # Select a page in a multipage document
4313                                 $page = $match;
4314                         } elseif ( $wgUseImageResize && ! is_null( $match = $mwWidth->matchVariableStartToEnd($val) ) ) {
4315                                 wfDebug( "img_width match: $match\n" );
4316                                 # $match is the image width in pixels
4317                                 $m = array();
4318                                 if ( preg_match( '/^([0-9]*)x([0-9]*)$/', $match, $m ) ) {
4319                                         $width = intval( $m[1] );
4320                                         $height = intval( $m[2] );
4321                                 } else {
4322                                         $width = intval($match);
4323                                 }
4324                         } elseif ( ! is_null( $mwFramed->matchVariableStartToEnd($val) ) ) {
4325                                 $framed=true;
4326                         } else {
4327                                 $caption = $val;
4328                         }
4329                 }
4330                 # Strip bad stuff out of the alt text
4331                 $alt = $this->replaceLinkHoldersText( $caption );
4332
4333                 # make sure there are no placeholders in thumbnail attributes
4334                 # that are later expanded to html- so expand them now and
4335                 # remove the tags
4336                 $alt = $this->unstrip($alt, $this->mStripState);
4337                 $alt = Sanitizer::stripAllTags( $alt );
4338
4339                 # Linker does the rest
4340                 $sk =& $this->mOptions->getSkin();
4341                 return $sk->makeImageLinkObj( $nt, $caption, $alt, $align, $width, $height, $framed, $thumb, $manual_thumb, $page );
4342         }
4343
4344         /**
4345          * Set a flag in the output object indicating that the content is dynamic and
4346          * shouldn't be cached.
4347          */
4348         function disableCache() {
4349                 wfDebug( "Parser output marked as uncacheable.\n" );
4350                 $this->mOutput->mCacheTime = -1;
4351         }
4352
4353         /**#@+
4354          * Callback from the Sanitizer for expanding items found in HTML attribute
4355          * values, so they can be safely tested and escaped.
4356          * @param string $text
4357          * @param array $args
4358          * @return string
4359          * @private
4360          */
4361         function attributeStripCallback( &$text, $args ) {
4362                 $text = $this->replaceVariables( $text, $args );
4363                 $text = $this->unstripForHTML( $text );
4364                 return $text;
4365         }
4366
4367         function unstripForHTML( $text ) {
4368                 $text = $this->unstrip( $text, $this->mStripState );
4369                 $text = $this->unstripNoWiki( $text, $this->mStripState );
4370                 return $text;
4371         }
4372         /**#@-*/
4373
4374         /**#@+
4375          * Accessor/mutator
4376          */
4377         function Title( $x = NULL ) { return wfSetVar( $this->mTitle, $x ); }
4378         function Options( $x = NULL ) { return wfSetVar( $this->mOptions, $x ); }
4379         function OutputType( $x = NULL ) { return wfSetVar( $this->mOutputType, $x ); }
4380         /**#@-*/
4381
4382         /**#@+
4383          * Accessor
4384          */
4385         function getTags() { return array_keys( $this->mTagHooks ); }
4386         /**#@-*/
4387
4388
4389         /**
4390          * Break wikitext input into sections, and either pull or replace
4391          * some particular section's text.
4392          *
4393          * External callers should use the getSection and replaceSection methods.
4394          *
4395          * @param $text Page wikitext
4396          * @param $section Numbered section. 0 pulls the text before the first
4397          *                 heading; other numbers will pull the given section
4398          *                 along with its lower-level subsections.
4399          * @param $mode One of "get" or "replace"
4400          * @param $newtext Replacement text for section data.
4401          * @return string for "get", the extracted section text.
4402          *                for "replace", the whole page with the section replaced.
4403          */
4404         private function extractSections( $text, $section, $mode, $newtext='' ) {
4405                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
4406                 # comments to be stripped as well)
4407                 $striparray = array();
4408
4409                 $oldOutputType = $this->mOutputType;
4410                 $oldOptions = $this->mOptions;
4411                 $this->mOptions = new ParserOptions();
4412                 $this->setOutputType( OT_WIKI );
4413
4414                 $striptext = $this->strip( $text, $striparray, true );
4415
4416                 $this->setOutputType( $oldOutputType );
4417                 $this->mOptions = $oldOptions;
4418
4419                 # now that we can be sure that no pseudo-sections are in the source,
4420                 # split it up by section
4421                 $uniq = preg_quote( $this->uniqPrefix(), '/' );
4422                 $comment = "(?:$uniq-!--.*?QINU)";
4423                 $secs = preg_split(
4424                 /*
4425                         "/
4426                         ^(
4427                         (?:$comment|<\/?noinclude>)* # Initial comments will be stripped
4428                         (?:
4429                                 (=+) # Should this be limited to 6?
4430                                 .+?  # Section title...
4431                                 \\2  # Ending = count must match start
4432                         |
4433                                 ^
4434                                 <h([1-6])\b.*?>
4435                                 .*?
4436                                 <\/h\\3\s*>
4437                         )
4438                         (?:$comment|<\/?noinclude>|\s+)* # Trailing whitespace ok
4439                         )$
4440                         /mix",
4441                 */
4442                         "/
4443                         (
4444                                 ^
4445                                 (?:$comment|<\/?noinclude>)* # Initial comments will be stripped
4446                                 (=+) # Should this be limited to 6?
4447                                 .+?  # Section title...
4448                                 \\2  # Ending = count must match start
4449                                 (?:$comment|<\/?noinclude>|[ \\t]+)* # Trailing whitespace ok
4450                                 $
4451                         |
4452                                 <h([1-6])\b.*?>
4453                                 .*?
4454                                 <\/h\\3\s*>
4455                         )
4456                         /mix",
4457                         $striptext, -1,
4458                         PREG_SPLIT_DELIM_CAPTURE);
4459
4460                 if( $mode == "get" ) {
4461                         if( $section == 0 ) {
4462                                 // "Section 0" returns the content before any other section.
4463                                 $rv = $secs[0];
4464                         } else {
4465                                 $rv = "";
4466                         }
4467                 } elseif( $mode == "replace" ) {
4468                         if( $section == 0 ) {
4469                                 $rv = $newtext . "\n\n";
4470                                 $remainder = true;
4471                         } else {
4472                                 $rv = $secs[0];
4473                                 $remainder = false;
4474                         }
4475                 }
4476                 $count = 0;
4477                 $sectionLevel = 0;
4478                 for( $index = 1; $index < count( $secs ); ) {
4479                         $headerLine = $secs[$index++];
4480                         if( $secs[$index] ) {
4481                                 // A wiki header
4482                                 $headerLevel = strlen( $secs[$index++] );
4483                         } else {
4484                                 // An HTML header
4485                                 $index++;
4486                                 $headerLevel = intval( $secs[$index++] );
4487                         }
4488                         $content = $secs[$index++];
4489
4490                         $count++;
4491                         if( $mode == "get" ) {
4492                                 if( $count == $section ) {
4493                                         $rv = $headerLine . $content;
4494                                         $sectionLevel = $headerLevel;
4495                                 } elseif( $count > $section ) {
4496                                         if( $sectionLevel && $headerLevel > $sectionLevel ) {
4497                                                 $rv .= $headerLine . $content;
4498                                         } else {
4499                                                 // Broke out to a higher-level section
4500                                                 break;
4501                                         }
4502                                 }
4503                         } elseif( $mode == "replace" ) {
4504                                 if( $count < $section ) {
4505                                         $rv .= $headerLine . $content;
4506                                 } elseif( $count == $section ) {
4507                                         $rv .= $newtext . "\n\n";
4508                                         $sectionLevel = $headerLevel;
4509                                 } elseif( $count > $section ) {
4510                                         if( $headerLevel <= $sectionLevel ) {
4511                                                 // Passed the section's sub-parts.
4512                                                 $remainder = true;
4513                                         }
4514                                         if( $remainder ) {
4515                                                 $rv .= $headerLine . $content;
4516                                         }
4517                                 }
4518                         }
4519                 }
4520                 # reinsert stripped tags
4521                 $rv = $this->unstrip( $rv, $striparray );
4522                 $rv = $this->unstripNoWiki( $rv, $striparray );
4523                 $rv = trim( $rv );
4524                 return $rv;
4525         }
4526
4527         /**
4528          * This function returns the text of a section, specified by a number ($section).
4529          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
4530          * the first section before any such heading (section 0).
4531          *
4532          * If a section contains subsections, these are also returned.
4533          *
4534          * @param $text String: text to look in
4535          * @param $section Integer: section number
4536          * @return string text of the requested section
4537          */
4538         function getSection( $text, $section ) {
4539                 return $this->extractSections( $text, $section, "get" );
4540         }
4541
4542         function replaceSection( $oldtext, $section, $text ) {
4543                 return $this->extractSections( $oldtext, $section, "replace", $text );
4544         }
4545
4546 }
4547
4548 /**
4549  * @todo document
4550  * @package MediaWiki
4551  */
4552 class ParserOutput
4553 {
4554         var $mText,             # The output text
4555                 $mLanguageLinks,    # List of the full text of language links, in the order they appear
4556                 $mCategories,       # Map of category names to sort keys
4557                 $mContainsOldMagic, # Boolean variable indicating if the input contained variables like {{CURRENTDAY}}
4558                 $mCacheTime,        # Time when this object was generated, or -1 for uncacheable. Used in ParserCache.
4559                 $mVersion,          # Compatibility check
4560                 $mTitleText,        # title text of the chosen language variant
4561                 $mLinks,            # 2-D map of NS/DBK to ID for the links in the document. ID=zero for broken.
4562                 $mTemplates,        # 2-D map of NS/DBK to ID for the template references. ID=zero for broken.
4563                 $mImages,           # DB keys of the images used, in the array key only
4564                 $mExternalLinks,    # External link URLs, in the key only
4565                 $mHTMLtitle,            # Display HTML title
4566                 $mSubtitle,                     # Additional subtitle
4567                 $mNewSection,           # Show a new section link?
4568                 $mNoGallery;            # No gallery on category page? (__NOGALLERY__)
4569
4570         function ParserOutput( $text = '', $languageLinks = array(), $categoryLinks = array(),
4571                 $containsOldMagic = false, $titletext = '' )
4572         {
4573                 $this->mText = $text;
4574                 $this->mLanguageLinks = $languageLinks;
4575                 $this->mCategories = $categoryLinks;
4576                 $this->mContainsOldMagic = $containsOldMagic;
4577                 $this->mCacheTime = '';
4578                 $this->mVersion = MW_PARSER_VERSION;
4579                 $this->mTitleText = $titletext;
4580                 $this->mLinks = array();
4581                 $this->mTemplates = array();
4582                 $this->mImages = array();
4583                 $this->mExternalLinks = array();
4584                 $this->mHTMLtitle = "" ;
4585                 $this->mSubtitle = "" ;
4586                 $this->mNewSection = false;
4587                 $this->mNoGallery = false;
4588         }
4589
4590         function getText()                   { return $this->mText; }
4591         function &getLanguageLinks()          { return $this->mLanguageLinks; }
4592         function getCategoryLinks()          { return array_keys( $this->mCategories ); }
4593         function &getCategories()            { return $this->mCategories; }
4594         function getCacheTime()              { return $this->mCacheTime; }
4595         function getTitleText()              { return $this->mTitleText; }
4596         function &getLinks()                 { return $this->mLinks; }
4597         function &getTemplates()             { return $this->mTemplates; }
4598         function &getImages()                { return $this->mImages; }
4599         function &getExternalLinks()         { return $this->mExternalLinks; }
4600         function getNoGallery()              { return $this->mNoGallery; }
4601         function getSubtitle()               { return $this->mSubtitle; }
4602
4603         function containsOldMagic()          { return $this->mContainsOldMagic; }
4604         function setText( $text )            { return wfSetVar( $this->mText, $text ); }
4605         function setLanguageLinks( $ll )     { return wfSetVar( $this->mLanguageLinks, $ll ); }
4606         function setCategoryLinks( $cl )     { return wfSetVar( $this->mCategories, $cl ); }
4607         function setContainsOldMagic( $com ) { return wfSetVar( $this->mContainsOldMagic, $com ); }
4608         function setCacheTime( $t )          { return wfSetVar( $this->mCacheTime, $t ); }
4609         function setTitleText( $t )          { return wfSetVar($this->mTitleText, $t); }
4610         function setSubtitle( $st )          { return wfSetVar( $this->mSubtitle, $st ); }
4611
4612         function addCategory( $c, $sort )    { $this->mCategories[$c] = $sort; }
4613         function addImage( $name )           { $this->mImages[$name] = 1; }
4614         function addLanguageLink( $t )       { $this->mLanguageLinks[] = $t; }
4615         function addExternalLink( $url )     { $this->mExternalLinks[$url] = 1; }
4616
4617         function setNewSection( $value ) {
4618                 $this->mNewSection = (bool)$value;
4619         }
4620         function getNewSection() {
4621                 return (bool)$this->mNewSection;
4622         }
4623
4624         function addLink( $title, $id = null ) {
4625                 $ns = $title->getNamespace();
4626                 $dbk = $title->getDBkey();
4627                 if ( !isset( $this->mLinks[$ns] ) ) {
4628                         $this->mLinks[$ns] = array();
4629                 }
4630                 if ( is_null( $id ) ) {
4631                         $id = $title->getArticleID();
4632                 }
4633                 $this->mLinks[$ns][$dbk] = $id;
4634         }
4635
4636         function addTemplate( $title, $id ) {
4637                 $ns = $title->getNamespace();
4638                 $dbk = $title->getDBkey();
4639                 if ( !isset( $this->mTemplates[$ns] ) ) {
4640                         $this->mTemplates[$ns] = array();
4641                 }
4642                 $this->mTemplates[$ns][$dbk] = $id;
4643         }
4644
4645         /**
4646          * Return true if this cached output object predates the global or
4647          * per-article cache invalidation timestamps, or if it comes from
4648          * an incompatible older version.
4649          *
4650          * @param string $touched the affected article's last touched timestamp
4651          * @return bool
4652          * @public
4653          */
4654         function expired( $touched ) {
4655                 global $wgCacheEpoch;
4656                 return $this->getCacheTime() == -1 || // parser says it's uncacheable
4657                        $this->getCacheTime() < $touched ||
4658                        $this->getCacheTime() <= $wgCacheEpoch ||
4659                        !isset( $this->mVersion ) ||
4660                        version_compare( $this->mVersion, MW_PARSER_VERSION, "lt" );
4661         }
4662 }
4663
4664 /**
4665  * Set options of the Parser
4666  * @todo document
4667  * @package MediaWiki
4668  */
4669 class ParserOptions
4670 {
4671         # All variables are private
4672         private $mUseTeX;                    # Use texvc to expand <math> tags
4673         private $mUseDynamicDates;           # Use DateFormatter to format dates
4674         private $mInterwikiMagic;            # Interlanguage links are removed and returned in an array
4675         private $mAllowExternalImages;       # Allow external images inline
4676         private $mAllowExternalImagesFrom;   # If not, any exception?
4677         private $mSkin;                      # Reference to the preferred skin
4678         private $mDateFormat;                # Date format index
4679         private $mEditSection;               # Create "edit section" links
4680         private $mNumberHeadings;            # Automatically number headings
4681         private $mAllowSpecialInclusion;     # Allow inclusion of special pages
4682         private $mTidy;                      # Ask for tidy cleanup
4683         private $mInterfaceMessage;          # Which lang to call for PLURAL and GRAMMAR
4684         private $mMaxIncludeSize;            # Maximum size of template expansions, in bytes
4685         private $mRemoveComments;            # Remove HTML comments. ONLY APPLIES TO PREPROCESS OPERATIONS
4686
4687         private $mUser;                      # Stored user object, just used to initialise the skin
4688
4689         function getUseTeX()                        { return $this->mUseTeX; }
4690         function getUseDynamicDates()               { return $this->mUseDynamicDates; }
4691         function getInterwikiMagic()                { return $this->mInterwikiMagic; }
4692         function getAllowExternalImages()           { return $this->mAllowExternalImages; }
4693         function getAllowExternalImagesFrom()       { return $this->mAllowExternalImagesFrom; }
4694         function getEditSection()                   { return $this->mEditSection; }
4695         function getNumberHeadings()                { return $this->mNumberHeadings; }
4696         function getAllowSpecialInclusion()         { return $this->mAllowSpecialInclusion; }
4697         function getTidy()                          { return $this->mTidy; }
4698         function getInterfaceMessage()              { return $this->mInterfaceMessage; }
4699         function getMaxIncludeSize()                { return $this->mMaxIncludeSize; }
4700         function getRemoveComments()                { return $this->mRemoveComments; }
4701
4702         function &getSkin() {
4703                 if ( !isset( $this->mSkin ) ) {
4704                         $this->mSkin = $this->mUser->getSkin();
4705                 }
4706                 return $this->mSkin;
4707         }
4708
4709         function getDateFormat() {
4710                 if ( !isset( $this->mDateFormat ) ) {
4711                         $this->mDateFormat = $this->mUser->getDatePreference();
4712                 }
4713                 return $this->mDateFormat;
4714         }
4715
4716         function setUseTeX( $x )                    { return wfSetVar( $this->mUseTeX, $x ); }
4717         function setUseDynamicDates( $x )           { return wfSetVar( $this->mUseDynamicDates, $x ); }
4718         function setInterwikiMagic( $x )            { return wfSetVar( $this->mInterwikiMagic, $x ); }
4719         function setAllowExternalImages( $x )       { return wfSetVar( $this->mAllowExternalImages, $x ); }
4720         function setAllowExternalImagesFrom( $x )   { return wfSetVar( $this->mAllowExternalImagesFrom, $x ); }
4721         function setDateFormat( $x )                { return wfSetVar( $this->mDateFormat, $x ); }
4722         function setEditSection( $x )               { return wfSetVar( $this->mEditSection, $x ); }
4723         function setNumberHeadings( $x )            { return wfSetVar( $this->mNumberHeadings, $x ); }
4724         function setAllowSpecialInclusion( $x )     { return wfSetVar( $this->mAllowSpecialInclusion, $x ); }
4725         function setTidy( $x )                      { return wfSetVar( $this->mTidy, $x); }
4726         function setSkin( $x )                      { $this->mSkin = $x; }
4727         function setInterfaceMessage( $x )          { return wfSetVar( $this->mInterfaceMessage, $x); }
4728         function setMaxIncludeSize( $x )            { return wfSetVar( $this->mMaxIncludeSize, $x ); }
4729         function setRemoveComments( $x )            { return wfSetVar( $this->mRemoveComments, $x ); }
4730
4731         function ParserOptions( $user = null ) {
4732                 $this->initialiseFromUser( $user );
4733         }
4734
4735         /**
4736          * Get parser options
4737          * @static
4738          */
4739         static function newFromUser( $user ) {
4740                 return new ParserOptions( $user );
4741         }
4742
4743         /** Get user options */
4744         function initialiseFromUser( $userInput ) {
4745                 global $wgUseTeX, $wgUseDynamicDates, $wgInterwikiMagic, $wgAllowExternalImages;
4746                 global $wgAllowExternalImagesFrom, $wgAllowSpecialInclusion, $wgMaxArticleSize;
4747                 $fname = 'ParserOptions::initialiseFromUser';
4748                 wfProfileIn( $fname );
4749                 if ( !$userInput ) {
4750                         global $wgUser;
4751                         if ( isset( $wgUser ) ) {
4752                                 $user = $wgUser;
4753                         } else {
4754                                 $user = new User;
4755                         }
4756                 } else {
4757                         $user =& $userInput;
4758                 }
4759
4760                 $this->mUser = $user;
4761
4762                 $this->mUseTeX = $wgUseTeX;
4763                 $this->mUseDynamicDates = $wgUseDynamicDates;
4764                 $this->mInterwikiMagic = $wgInterwikiMagic;
4765                 $this->mAllowExternalImages = $wgAllowExternalImages;
4766                 $this->mAllowExternalImagesFrom = $wgAllowExternalImagesFrom;
4767                 $this->mSkin = null; # Deferred
4768                 $this->mDateFormat = null; # Deferred
4769                 $this->mEditSection = true;
4770                 $this->mNumberHeadings = $user->getOption( 'numberheadings' );
4771                 $this->mAllowSpecialInclusion = $wgAllowSpecialInclusion;
4772                 $this->mTidy = false;
4773                 $this->mInterfaceMessage = false;
4774                 $this->mMaxIncludeSize = $wgMaxArticleSize * 1024;
4775                 $this->mRemoveComments = true;
4776                 wfProfileOut( $fname );
4777         }
4778 }
4779
4780 /**
4781  * Callback function used by Parser::replaceLinkHolders()
4782  * to substitute link placeholders.
4783  */
4784 function &wfOutputReplaceMatches( $matches ) {
4785         global $wgOutputReplace;
4786         return $wgOutputReplace[$matches[1]];
4787 }
4788
4789 /**
4790  * Return the total number of articles
4791  */
4792 function wfNumberOfArticles() {
4793         global $wgNumberOfArticles;
4794
4795         wfLoadSiteStats();
4796         return $wgNumberOfArticles;
4797 }
4798
4799 /**
4800  * Return the number of files
4801  */
4802 function wfNumberOfFiles() {
4803         $fname = 'wfNumberOfFiles';
4804
4805         wfProfileIn( $fname );
4806         $dbr =& wfGetDB( DB_SLAVE );
4807         $numImages = $dbr->selectField('site_stats', 'ss_images', array(), $fname );
4808         wfProfileOut( $fname );
4809
4810         return $numImages;
4811 }
4812
4813 /**
4814  * Return the number of user accounts
4815  * @return integer
4816  */
4817 function wfNumberOfUsers() {
4818         wfProfileIn( 'wfNumberOfUsers' );
4819         $dbr =& wfGetDB( DB_SLAVE );
4820         $count = $dbr->selectField( 'site_stats', 'ss_users', array(), 'wfNumberOfUsers' );
4821         wfProfileOut( 'wfNumberOfUsers' );
4822         return (int)$count;
4823 }
4824
4825 /**
4826  * Return the total number of pages
4827  * @return integer
4828  */
4829 function wfNumberOfPages() {
4830         wfProfileIn( 'wfNumberOfPages' );
4831         $dbr =& wfGetDB( DB_SLAVE );
4832         $count = $dbr->selectField( 'site_stats', 'ss_total_pages', array(), 'wfNumberOfPages' );
4833         wfProfileOut( 'wfNumberOfPages' );
4834         return (int)$count;
4835 }
4836
4837 /**
4838  * Return the total number of admins
4839  *
4840  * @return integer
4841  */
4842 function wfNumberOfAdmins() {
4843         static $admins = -1;
4844         wfProfileIn( 'wfNumberOfAdmins' );
4845         if( $admins == -1 ) {
4846                 $dbr =& wfGetDB( DB_SLAVE );
4847                 $admins = $dbr->selectField( 'user_groups', 'COUNT(*)', array( 'ug_group' => 'sysop' ), 'wfNumberOfAdmins' );
4848         }
4849         wfProfileOut( 'wfNumberOfAdmins' );
4850         return (int)$admins;
4851 }
4852
4853 /**
4854  * Count the number of pages in a particular namespace
4855  *
4856  * @param $ns Namespace
4857  * @return integer
4858  */
4859 function wfPagesInNs( $ns ) {
4860         static $pageCount = array();
4861         wfProfileIn( 'wfPagesInNs' );
4862         if( !isset( $pageCount[$ns] ) ) {
4863                 $dbr =& wfGetDB( DB_SLAVE );
4864                 $pageCount[$ns] = $dbr->selectField( 'page', 'COUNT(*)', array( 'page_namespace' => $ns ), 'wfPagesInNs' );
4865         }
4866         wfProfileOut( 'wfPagesInNs' );
4867         return (int)$pageCount[$ns];
4868 }
4869
4870 /**
4871  * Get various statistics from the database
4872  * @private
4873  */
4874 function wfLoadSiteStats() {
4875         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
4876         $fname = 'wfLoadSiteStats';
4877
4878         if ( -1 != $wgNumberOfArticles ) return;
4879         $dbr =& wfGetDB( DB_SLAVE );
4880         $s = $dbr->selectRow( 'site_stats',
4881                 array( 'ss_total_views', 'ss_total_edits', 'ss_good_articles' ),
4882                 array( 'ss_row_id' => 1 ), $fname
4883         );
4884
4885         if ( $s === false ) {
4886                 return;
4887         } else {
4888                 $wgTotalViews = $s->ss_total_views;
4889                 $wgTotalEdits = $s->ss_total_edits;
4890                 $wgNumberOfArticles = $s->ss_good_articles;
4891         }
4892 }
4893
4894 /**
4895  * Get revision timestamp from the database considering timecorrection
4896  *
4897  * @param $id Int: page revision id
4898  * @return integer
4899  */
4900 function wfRevisionTimestamp( $id ) {
4901         global $wgContLang;
4902         $fname = 'wfRevisionTimestamp';
4903
4904         wfProfileIn( $fname );
4905         $dbr =& wfGetDB( DB_SLAVE );
4906         $timestamp = $dbr->selectField( 'revision', 'rev_timestamp',
4907                         array( 'rev_id' => $id ), __METHOD__ );
4908         $timestamp = $wgContLang->userAdjust( $timestamp );
4909         wfProfileOut( $fname );
4910
4911         return $timestamp;
4912 }
4913
4914 /**
4915  * Escape html tags
4916  * Basically replacing " > and < with HTML entities ( &quot;, &gt;, &lt;)
4917  *
4918  * @param $in String: text that might contain HTML tags.
4919  * @return string Escaped string
4920  */
4921 function wfEscapeHTMLTagsOnly( $in ) {
4922         return str_replace(
4923                 array( '"', '>', '<' ),
4924                 array( '&quot;', '&gt;', '&lt;' ),
4925                 $in );
4926 }
4927
4928 ?>