includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( 1 );
   4
   5 /**
   6  * @todo document
   7  */
   8 class OutputPage {
   9         var $mMetatags = array(), $mKeywords = array(), $mLinktags = array();
  10         var $mExtStyles = array();
  11         var $mPagetitle = '', $mBodytext = '', $mDebugtext = '';
  12         var $mHTMLtitle = '', $mIsarticle = true, $mPrintable = false;
  13         var $mSubtitle = '', $mRedirect = '', $mStatusCode;
  14         var $mLastModified = '', $mETag = false;
  15         var $mCategoryLinks = array(), $mLanguageLinks = array();
  16         var $mScripts = '', $mLinkColours, $mPageLinkTitle = '', $mHeadItems = array();
  17         var $mTemplateIds = array();
  18
  19         var $mAllowUserJs;
  20         var $mSuppressQuickbar = false;
  21         var $mOnloadHandler = '';
  22         var $mDoNothing = false;
  23         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
  24         var $mIsArticleRelated = true;
  25         protected $mParserOptions = null; // lazy initialised, use parserOptions()
  26         var $mShowFeedLinks = false;
  27         var $mFeedLinksAppendQuery = false;
  28         var $mEnableClientCache = true;
  29         var $mArticleBodyOnly = false;
  30
  31         var $mNewSectionLink = false;
  32         var $mNoGallery = false;
  33         var $mPageTitleActionText = '';
  34         var $mParseWarnings = array();
  35         var $mSquidMaxage = 0;
  36         var $mRevisionId = null;
  37
  38         /**
  39          * An array of stylesheet filenames (relative from skins path), with options
  40          * for CSS media, IE conditions, and RTL/LTR direction.
  41          * For internal use; add settings in the skin via $this->addStyle()
  42          */
  43         var $styles = array();
  44
  45         private $mIndexPolicy = 'index';
  46         private $mFollowPolicy = 'follow';
  47
  48         /**
  49          * Constructor
  50          * Initialise private variables
  51          */
  52         function __construct() {
  53                 global $wgAllowUserJs;
  54                 $this->mAllowUserJs = $wgAllowUserJs;
  55         }
  56
  57         public function redirect( $url, $responsecode = '302' ) {
  58                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  59                 $this->mRedirect = str_replace( "\n", '', $url );
  60                 $this->mRedirectCode = $responsecode;
  61         }
  62
  63         public function getRedirect() {
  64                 return $this->mRedirect;
  65         }
  66
  67         /**
  68          * Set the HTTP status code to send with the output.
  69          *
  70          * @param int $statusCode
  71          * @return nothing
  72          */
  73         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  74
  75         /**
  76          * Add a new <meta> tag
  77          * To add an http-equiv meta tag, precede the name with "http:"
  78          *
  79          * @param $name tag name
  80          * @param $val tag value
  81          */
  82         function addMeta( $name, $val ) {
  83                 array_push( $this->mMetatags, array( $name, $val ) );
  84         }
  85
  86         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  87         function addScript( $script ) { $this->mScripts .= "\t\t".$script; }
  88
  89         function addExtensionStyle( $url ) {
  90                 $linkarr = array( 'rel' => 'stylesheet', 'href' => $url, 'type' => 'text/css' );
  91                 array_push( $this->mExtStyles, $linkarr );
  92         }
  93
  94         /**
  95          * Add a JavaScript file out of skins/common, or a given relative path.
  96          * @param string $file filename in skins/common or complete on-server path (/foo/bar.js)
  97          */
  98         function addScriptFile( $file ) {
  99                 global $wgStylePath, $wgStyleVersion, $wgJsMimeType;
 100                 if( substr( $file, 0, 1 ) == '/' ) {
 101                         $path = $file;
 102                 } else {
 103                         $path =  "{$wgStylePath}/common/{$file}";
 104                 }
 105                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"$path?$wgStyleVersion\"></script>\n" );
 106         }
 107
 108         /**
 109          * Add a self-contained script tag with the given contents
 110          * @param string $script JavaScript text, no <script> tags
 111          */
 112         function addInlineScript( $script ) {
 113                 global $wgJsMimeType;
 114                 $this->mScripts .= "<script type=\"$wgJsMimeType\">/*<![CDATA[*/\n$script\n/*]]>*/</script>";
 115         }
 116
 117         function getScript() {
 118                 return $this->mScripts . $this->getHeadItems();
 119         }
 120
 121         function getHeadItems() {
 122                 $s = '';
 123                 foreach ( $this->mHeadItems as $item ) {
 124                         $s .= $item;
 125                 }
 126                 return $s;
 127         }
 128
 129         function addHeadItem( $name, $value ) {
 130                 $this->mHeadItems[$name] = $value;
 131         }
 132
 133         function hasHeadItem( $name ) {
 134                 return isset( $this->mHeadItems[$name] );
 135         }
 136
 137         function setETag($tag) { $this->mETag = $tag; }
 138         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 139         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
 140
 141         function addLink( $linkarr ) {
 142                 # $linkarr should be an associative array of attributes. We'll escape on output.
 143                 array_push( $this->mLinktags, $linkarr );
 144         }
 145
 146         # Get all links added by extensions
 147         function getExtStyle() {
 148                 return $this->mExtStyles;
 149         }
 150
 151         function addMetadataLink( $linkarr ) {
 152                 # note: buggy CC software only reads first "meta" link
 153                 static $haveMeta = false;
 154                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 155                 $this->addLink( $linkarr );
 156                 $haveMeta = true;
 157         }
 158
 159         /**
 160          * checkLastModified tells the client to use the client-cached page if
 161          * possible. If sucessful, the OutputPage is disabled so that
 162          * any future call to OutputPage->output() have no effect.
 163          *
 164          * Side effect: sets mLastModified for Last-Modified header
 165          *
 166          * @return bool True iff cache-ok headers was sent.
 167          */
 168         function checkLastModified ( $timestamp ) {
 169                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 170
 171                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 172                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 173                         return false;
 174                 }
 175                 if( !$wgCachePages ) {
 176                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 177                         return false;
 178                 }
 179                 if( $wgUser->getOption( 'nocache' ) ) {
 180                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 181                         return false;
 182                 }
 183
 184                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 185                 $modifiedTimes = array(
 186                         'page' => $timestamp,
 187                         'user' => $wgUser->getTouched(),
 188                         'epoch' => $wgCacheEpoch
 189                 );
 190                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 191
 192                 $maxModified = max( $modifiedTimes );
 193                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 194
 195                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 196                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 197                         return false;
 198                 }
 199
 200                 # Make debug info
 201                 $info = '';
 202                 foreach ( $modifiedTimes as $name => $value ) {
 203                         if ( $info !== '' ) {
 204                                 $info .= ', ';
 205                         }
 206                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 207                 }
 208
 209                 # IE sends sizes after the date like this:
 210                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 211                 # this breaks strtotime().
 212                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 213
 214                 wfSuppressWarnings(); // E_STRICT system time bitching
 215                 $clientHeaderTime = strtotime( $clientHeader );
 216                 wfRestoreWarnings();
 217                 if ( !$clientHeaderTime ) {
 218                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 219                         return false;
 220                 }
 221                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 222
 223                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 224                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 225                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 226                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 227                 if( $clientHeaderTime < $maxModified ) {
 228                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 229                         return false;
 230                 }
 231
 232                 # Not modified
 233                 # Give a 304 response code and disable body output
 234                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 235                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 236                 $this->sendCacheControl();
 237                 $this->disable();
 238
 239                 // Don't output a compressed blob when using ob_gzhandler;
 240                 // it's technically against HTTP spec and seems to confuse
 241                 // Firefox when the response gets split over two packets.
 242                 wfClearOutputBuffers();
 243
 244                 return true;
 245         }
 246
 247         function setPageTitleActionText( $text ) {
 248                 $this->mPageTitleActionText = $text;
 249         }
 250
 251         function getPageTitleActionText () {
 252                 if ( isset( $this->mPageTitleActionText ) ) {
 253                         return $this->mPageTitleActionText;
 254                 }
 255         }
 256
 257         /**
 258          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 259          *
 260          * @param $policy string The literal string to output as the contents of
 261          *   the meta tag.  Will be parsed according to the spec and output in
 262          *   standardized form.
 263          * @return null
 264          */
 265         public function setRobotPolicy( $policy ) {
 266                 $policy = explode( ',', $policy );
 267                 $policy = array_map( 'trim', $policy );
 268
 269                 # The default policy is follow, so if nothing is said explicitly, we
 270                 # do that.
 271                 if( in_array( 'nofollow', $policy ) ) {
 272                         $this->mFollowPolicy = 'nofollow';
 273                 } else {
 274                         $this->mFollowPolicy = 'follow';
 275                 }
 276
 277                 if( in_array( 'noindex', $policy ) ) {
 278                         $this->mIndexPolicy = 'noindex';
 279                 } else {
 280                         $this->mIndexPolicy = 'index';
 281                 }
 282         }
 283
 284         /**
 285          * Set the index policy for the page, but leave the follow policy un-
 286          * touched.
 287          *
 288          * @param $policy string Either 'index' or 'noindex'.
 289          * @return null
 290          */
 291         public function setIndexPolicy( $policy ) {
 292                 $policy = trim( $policy );
 293                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 294                         $this->mIndexPolicy = $policy;
 295                 }
 296         }
 297
 298         /**
 299          * Set the follow policy for the page, but leave the index policy un-
 300          * touched.
 301          *
 302          * @param $policy string Either 'follow' or 'nofollow'.
 303          * @return null
 304          */
 305         public function setFollowPolicy( $policy ) {
 306                 $policy = trim( $policy );
 307                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 308                         $this->mFollowPolicy = $policy;
 309                 }
 310         }
 311
 312         public function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 313         public function setPageTitle( $name ) {
 314                 global $action, $wgContLang;
 315                 $name = $wgContLang->convert($name, true);
 316                 $this->mPagetitle = $name;
 317                 if(!empty($action)) {
 318                         $taction =  $this->getPageTitleActionText();
 319                         if( !empty( $taction ) ) {
 320                                 $name .= ' - '.$taction;
 321                         }
 322                 }
 323
 324                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 325         }
 326         public function getHTMLTitle() { return $this->mHTMLtitle; }
 327         public function getPageTitle() { return $this->mPagetitle; }
 328         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 329         public function appendSubtitle( $str ) { $this->mSubtitle .= /*$this->parse(*/$str/*)*/; } // @bug 2514
 330         public function getSubtitle() { return $this->mSubtitle; }
 331         public function isArticle() { return $this->mIsarticle; }
 332         public function setPrintable() { $this->mPrintable = true; }
 333         public function isPrintable() { return $this->mPrintable; }
 334         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 335         public function isSyndicated() { return $this->mShowFeedLinks; }
 336         public function setFeedAppendQuery( $val ) { $this->mFeedLinksAppendQuery = $val; }
 337         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 338         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 339         public function getOnloadHandler() { return $this->mOnloadHandler; }
 340         public function disable() { $this->mDoNothing = true; }
 341
 342         public function setArticleRelated( $v ) {
 343                 $this->mIsArticleRelated = $v;
 344                 if ( !$v ) {
 345                         $this->mIsarticle = false;
 346                 }
 347         }
 348         public function setArticleFlag( $v ) {
 349                 $this->mIsarticle = $v;
 350                 if ( $v ) {
 351                         $this->mIsArticleRelated = $v;
 352                 }
 353         }
 354
 355         public function isArticleRelated() { return $this->mIsArticleRelated; }
 356
 357         public function getLanguageLinks() { return $this->mLanguageLinks; }
 358         public function addLanguageLinks($newLinkArray) {
 359                 $this->mLanguageLinks += $newLinkArray;
 360         }
 361         public function setLanguageLinks($newLinkArray) {
 362                 $this->mLanguageLinks = $newLinkArray;
 363         }
 364
 365         public function getCategoryLinks() {
 366                 return $this->mCategoryLinks;
 367         }
 368
 369         /**
 370          * Add an array of categories, with names in the keys
 371          */
 372         public function addCategoryLinks( $categories ) {
 373                 global $wgUser, $wgContLang;
 374
 375                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 376                         return;
 377                 }
 378
 379                 # Add the links to a LinkBatch
 380                 $arr = array( NS_CATEGORY => $categories );
 381                 $lb = new LinkBatch;
 382                 $lb->setArray( $arr );
 383
 384                 # Fetch existence plus the hiddencat property
 385                 $dbr = wfGetDB( DB_SLAVE );
 386                 $pageTable = $dbr->tableName( 'page' );
 387                 $where = $lb->constructSet( 'page', $dbr );
 388                 $propsTable = $dbr->tableName( 'page_props' );
 389                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 390                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 391                 $res = $dbr->query( $sql, __METHOD__ );
 392
 393                 # Add the results to the link cache
 394                 $lb->addResultToCache( LinkCache::singleton(), $res );
 395
 396                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 397                 $categories = array_combine( array_keys( $categories ),
 398                         array_fill( 0, count( $categories ), 'normal' ) );
 399
 400                 # Mark hidden categories
 401                 foreach ( $res as $row ) {
 402                         if ( isset( $row->pp_value ) ) {
 403                                 $categories[$row->page_title] = 'hidden';
 404                         }
 405                 }
 406
 407                 # Add the remaining categories to the skin
 408                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 409                         $sk = $wgUser->getSkin();
 410                         foreach ( $categories as $category => $type ) {
 411                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 412                                 $text = $wgContLang->convertHtml( $title->getText() );
 413                                 $this->mCategoryLinks[$type][] = $sk->makeLinkObj( $title, $text );
 414                         }
 415                 }
 416         }
 417
 418         public function setCategoryLinks($categories) {
 419                 $this->mCategoryLinks = array();
 420                 $this->addCategoryLinks($categories);
 421         }
 422
 423         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 424         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 425
 426         public function disallowUserJs() { $this->mAllowUserJs = false; }
 427         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 428
 429         public function prependHTML( $text ) { $this->mBodytext = $text . $this->mBodytext; }
 430         public function addHTML( $text ) { $this->mBodytext .= $text; }
 431         public function clearHTML() { $this->mBodytext = ''; }
 432         public function getHTML() { return $this->mBodytext; }
 433         public function debug( $text ) { $this->mDebugtext .= $text; }
 434
 435         /* @deprecated */
 436         public function setParserOptions( $options ) {
 437                 wfDeprecated( __METHOD__ );
 438                 return $this->parserOptions( $options );
 439         }
 440
 441         public function parserOptions( $options = null ) {
 442                 if ( !$this->mParserOptions ) {
 443                         $this->mParserOptions = new ParserOptions;
 444                 }
 445                 return wfSetVar( $this->mParserOptions, $options );
 446         }
 447
 448         /**
 449          * Set the revision ID which will be seen by the wiki text parser
 450          * for things such as embedded {{REVISIONID}} variable use.
 451          * @param mixed $revid an integer, or NULL
 452          * @return mixed previous value
 453          */
 454         public function setRevisionId( $revid ) {
 455                 $val = is_null( $revid ) ? null : intval( $revid );
 456                 return wfSetVar( $this->mRevisionId, $val );
 457         }
 458
 459         public function getRevisionId() {
 460                 return $this->mRevisionId;
 461         }
 462
 463         /**
 464          * Convert wikitext to HTML and add it to the buffer
 465          * Default assumes that the current page title will
 466          * be used.
 467          *
 468          * @param string $text
 469          * @param bool   $linestart
 470          */
 471         public function addWikiText( $text, $linestart = true ) {
 472                 global $wgTitle;
 473                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 474         }
 475
 476         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 477                 $this->addWikiTextTitle($text, $title, $linestart);
 478         }
 479
 480         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 481                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 482         }
 483
 484         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 485                 global $wgParser;
 486
 487                 wfProfileIn( __METHOD__ );
 488
 489                 wfIncrStats( 'pcache_not_possible' );
 490
 491                 $popts = $this->parserOptions();
 492                 $oldTidy = $popts->setTidy( $tidy );
 493
 494                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 495                         $linestart, true, $this->mRevisionId );
 496
 497                 $popts->setTidy( $oldTidy );
 498
 499                 $this->addParserOutput( $parserOutput );
 500
 501                 wfProfileOut( __METHOD__ );
 502         }
 503
 504         /**
 505          * @todo document
 506          * @param ParserOutput object &$parserOutput
 507          */
 508         public function addParserOutputNoText( &$parserOutput ) {
 509                 global $wgTitle, $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 510
 511                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 512                 $this->addCategoryLinks( $parserOutput->getCategories() );
 513                 $this->mNewSectionLink = $parserOutput->getNewSection();
 514
 515                 if( is_null( $wgExemptFromUserRobotsControl ) ) {
 516                         $bannedNamespaces = $wgContentNamespaces;
 517                 } else {
 518                         $bannedNamespaces = $wgExemptFromUserRobotsControl;
 519                 }
 520                 if( !in_array( $wgTitle->getNamespace(), $bannedNamespaces ) ) {
 521                         # FIXME (bug 14900): This overrides $wgArticleRobotPolicies, and it
 522                         # shouldn't
 523                         $this->setIndexPolicy( $parserOutput->getIndexPolicy() );
 524                 }
 525
 526                 $this->addKeywords( $parserOutput );
 527                 $this->mParseWarnings = $parserOutput->getWarnings();
 528                 if ( $parserOutput->getCacheTime() == -1 ) {
 529                         $this->enableClientCache( false );
 530                 }
 531                 $this->mNoGallery = $parserOutput->getNoGallery();
 532                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 533                 // Versioning...
 534                 $this->mTemplateIds = wfArrayMerge( $this->mTemplateIds, (array)$parserOutput->mTemplateIds );
 535
 536                 // Display title
 537                 if( ( $dt = $parserOutput->getDisplayTitle() ) !== false )
 538                         $this->setPageTitle( $dt );
 539
 540                 // Hooks registered in the object
 541                 global $wgParserOutputHooks;
 542                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 543                         list( $hookName, $data ) = $hookInfo;
 544                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 545                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 546                         }
 547                 }
 548
 549                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 550         }
 551
 552         /**
 553          * @todo document
 554          * @param ParserOutput &$parserOutput
 555          */
 556         function addParserOutput( &$parserOutput ) {
 557                 $this->addParserOutputNoText( $parserOutput );
 558                 $text = $parserOutput->getText();
 559                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 560                 $this->addHTML( $text );
 561         }
 562
 563         /**
 564          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 565          * Saves the text into the parser cache if possible.
 566          *
 567          * @param string  $text
 568          * @param Article $article
 569          * @param bool    $cache
 570          * @deprecated Use Article::outputWikitext
 571          */
 572         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 573                 global $wgParser, $wgUser;
 574
 575                 wfDeprecated( __METHOD__ );
 576
 577                 $popts = $this->parserOptions();
 578                 $popts->setTidy(true);
 579                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 580                         $popts, true, true, $this->mRevisionId );
 581                 $popts->setTidy(false);
 582                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 583                         $parserCache = ParserCache::singleton();
 584                         $parserCache->save( $parserOutput, $article, $wgUser );
 585                 }
 586
 587                 $this->addParserOutput( $parserOutput );
 588         }
 589
 590         /**
 591          * @deprecated use addWikiTextTidy()
 592          */
 593         public function addSecondaryWikiText( $text, $linestart = true ) {
 594                 global $wgTitle;
 595                 wfDeprecated( __METHOD__ );
 596                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 597         }
 598
 599         /**
 600          * Add wikitext with tidy enabled
 601          */
 602         public function addWikiTextTidy(  $text, $linestart = true ) {
 603                 global $wgTitle;
 604                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 605         }
 606
 607
 608         /**
 609          * Add the output of a QuickTemplate to the output buffer
 610          *
 611          * @param QuickTemplate $template
 612          */
 613         public function addTemplate( &$template ) {
 614                 ob_start();
 615                 $template->execute();
 616                 $this->addHTML( ob_get_contents() );
 617                 ob_end_clean();
 618         }
 619
 620         /**
 621          * Parse wikitext and return the HTML.
 622          *
 623          * @param string $text
 624          * @param bool   $linestart Is this the start of a line?
 625          * @param bool   $interface ??
 626          */
 627         public function parse( $text, $linestart = true, $interface = false ) {
 628                 global $wgParser, $wgTitle;
 629                 $popts = $this->parserOptions();
 630                 if ( $interface) { $popts->setInterfaceMessage(true); }
 631                 $parserOutput = $wgParser->parse( $text, $wgTitle, $popts,
 632                         $linestart, true, $this->mRevisionId );
 633                 if ( $interface) { $popts->setInterfaceMessage(false); }
 634                 return $parserOutput->getText();
 635         }
 636
 637         /**
 638          * @param Article $article
 639          * @param User    $user
 640          *
 641          * @return bool True if successful, else false.
 642          */
 643         public function tryParserCache( &$article, $user ) {
 644                 $parserCache = ParserCache::singleton();
 645                 $parserOutput = $parserCache->get( $article, $user );
 646                 if ( $parserOutput !== false ) {
 647                         $this->addParserOutput( $parserOutput );
 648                         return true;
 649                 } else {
 650                         return false;
 651                 }
 652         }
 653
 654         /**
 655          * @param int $maxage Maximum cache time on the Squid, in seconds.
 656          */
 657         public function setSquidMaxage( $maxage ) {
 658                 $this->mSquidMaxage = $maxage;
 659         }
 660
 661         /**
 662          * Use enableClientCache(false) to force it to send nocache headers
 663          * @param $state ??
 664          */
 665         public function enableClientCache( $state ) {
 666                 return wfSetVar( $this->mEnableClientCache, $state );
 667         }
 668
 669         function getCacheVaryCookies() {
 670                 global $wgCookiePrefix, $wgCacheVaryCookies;
 671                 static $cookies;
 672                 if ( $cookies === null ) {
 673                         $cookies = array_merge(
 674                                 array(
 675                                         "{$wgCookiePrefix}Token",
 676                                         "{$wgCookiePrefix}LoggedOut",
 677                                         session_name()
 678                                 ),
 679                                 $wgCacheVaryCookies
 680                         );
 681                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 682                 }
 683                 return $cookies;
 684         }
 685
 686         function uncacheableBecauseRequestVars() {
 687                 global $wgRequest;
 688                 return  $wgRequest->getText('useskin', false) === false
 689                         && $wgRequest->getText('uselang', false) === false;
 690         }
 691
 692         /**
 693          * Check if the request has a cache-varying cookie header
 694          * If it does, it's very important that we don't allow public caching
 695          */
 696         function haveCacheVaryCookies() {
 697                 global $wgRequest, $wgCookiePrefix;
 698                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 699                 if ( $cookieHeader === false ) {
 700                         return false;
 701                 }
 702                 $cvCookies = $this->getCacheVaryCookies();
 703                 foreach ( $cvCookies as $cookieName ) {
 704                         # Check for a simple string match, like the way squid does it
 705                         if ( strpos( $cookieHeader, $cookieName ) ) {
 706                                 wfDebug( __METHOD__.": found $cookieName\n" );
 707                                 return true;
 708                         }
 709                 }
 710                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 711                 return false;
 712         }
 713
 714         /** Get a complete X-Vary-Options header */
 715         public function getXVO() {
 716                 global $wgCookiePrefix;
 717                 $cvCookies = $this->getCacheVaryCookies();
 718                 $xvo = 'X-Vary-Options: Accept-Encoding;list-contains=gzip,Cookie;';
 719                 $first = true;
 720                 foreach ( $cvCookies as $cookieName ) {
 721                         if ( $first ) {
 722                                 $first = false;
 723                         } else {
 724                                 $xvo .= ';';
 725                         }
 726                         $xvo .= 'string-contains=' . $cookieName;
 727                 }
 728                 return $xvo;
 729         }
 730
 731         public function sendCacheControl() {
 732                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest;
 733
 734                 $response = $wgRequest->response();
 735                 if ($wgUseETag && $this->mETag)
 736                         $response->header("ETag: $this->mETag");
 737
 738                 # don't serve compressed data to clients who can't handle it
 739                 # maintain different caches for logged-in users and non-logged in ones
 740                 $response->header( 'Vary: Accept-Encoding, Cookie' );
 741
 742                 # Add an X-Vary-Options header for Squid with Wikimedia patches
 743                 $response->header( $this->getXVO() );
 744
 745                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
 746                         if( $wgUseSquid && session_id() == '' &&
 747                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
 748                         {
 749                                 if ( $wgUseESI ) {
 750                                         # We'll purge the proxy cache explicitly, but require end user agents
 751                                         # to revalidate against the proxy on each visit.
 752                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 753                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
 754                                         # start with a shorter timeout for initial testing
 755                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 756                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 757                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 758                                 } else {
 759                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 760                                         # to revalidate against the proxy on each visit.
 761                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 762                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 763                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
 764                                         # start with a shorter timeout for initial testing
 765                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 766                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 767                                 }
 768                         } else {
 769                                 # We do want clients to cache if they can, but they *must* check for updates
 770                                 # on revisiting the page.
 771                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
 772                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 773                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
 774                         }
 775                         if($this->mLastModified) {
 776                                 $response->header( "Last-Modified: {$this->mLastModified}" );
 777                         }
 778                 } else {
 779                         wfDebug( __METHOD__ . ": no caching **\n", false );
 780
 781                         # In general, the absence of a last modified header should be enough to prevent
 782                         # the client from using its cache. We send a few other things just to make sure.
 783                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 784                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 785                         $response->header( 'Pragma: no-cache' );
 786                 }
 787         }
 788
 789         /**
 790          * Finally, all the text has been munged and accumulated into
 791          * the object, let's actually output it:
 792          */
 793         public function output() {
 794                 global $wgUser, $wgOutputEncoding, $wgRequest;
 795                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 796                 global $wgJsMimeType, $wgUseAjax, $wgAjaxWatch;
 797                 global $wgEnableMWSuggest;
 798
 799                 if( $this->mDoNothing ){
 800                         return;
 801                 }
 802
 803                 wfProfileIn( __METHOD__ );
 804
 805                 if ( '' != $this->mRedirect ) {
 806                         # Standards require redirect URLs to be absolute
 807                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
 808                         if( $this->mRedirectCode == '301') {
 809                                 if( !$wgDebugRedirects ) {
 810                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 811                                 }
 812                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 813                         }
 814
 815                         $this->sendCacheControl();
 816
 817                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
 818                         if( $wgDebugRedirects ) {
 819                                 $url = htmlspecialchars( $this->mRedirect );
 820                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 821                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 822                                 print "</body>\n</html>\n";
 823                         } else {
 824                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 825                         }
 826                         wfProfileOut( __METHOD__ );
 827                         return;
 828                 }
 829                 elseif ( $this->mStatusCode )
 830                 {
 831                         $statusMessage = array(
 832                                 100 => 'Continue',
 833                                 101 => 'Switching Protocols',
 834                                 102 => 'Processing',
 835                                 200 => 'OK',
 836                                 201 => 'Created',
 837                                 202 => 'Accepted',
 838                                 203 => 'Non-Authoritative Information',
 839                                 204 => 'No Content',
 840                                 205 => 'Reset Content',
 841                                 206 => 'Partial Content',
 842                                 207 => 'Multi-Status',
 843                                 300 => 'Multiple Choices',
 844                                 301 => 'Moved Permanently',
 845                                 302 => 'Found',
 846                                 303 => 'See Other',
 847                                 304 => 'Not Modified',
 848                                 305 => 'Use Proxy',
 849                                 307 => 'Temporary Redirect',
 850                                 400 => 'Bad Request',
 851                                 401 => 'Unauthorized',
 852                                 402 => 'Payment Required',
 853                                 403 => 'Forbidden',
 854                                 404 => 'Not Found',
 855                                 405 => 'Method Not Allowed',
 856                                 406 => 'Not Acceptable',
 857                                 407 => 'Proxy Authentication Required',
 858                                 408 => 'Request Timeout',
 859                                 409 => 'Conflict',
 860                                 410 => 'Gone',
 861                                 411 => 'Length Required',
 862                                 412 => 'Precondition Failed',
 863                                 413 => 'Request Entity Too Large',
 864                                 414 => 'Request-URI Too Large',
 865                                 415 => 'Unsupported Media Type',
 866                                 416 => 'Request Range Not Satisfiable',
 867                                 417 => 'Expectation Failed',
 868                                 422 => 'Unprocessable Entity',
 869                                 423 => 'Locked',
 870                                 424 => 'Failed Dependency',
 871                                 500 => 'Internal Server Error',
 872                                 501 => 'Not Implemented',
 873                                 502 => 'Bad Gateway',
 874                                 503 => 'Service Unavailable',
 875                                 504 => 'Gateway Timeout',
 876                                 505 => 'HTTP Version Not Supported',
 877                                 507 => 'Insufficient Storage'
 878                         );
 879
 880                         if ( $statusMessage[$this->mStatusCode] )
 881                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 882                 }
 883
 884                 $sk = $wgUser->getSkin();
 885
 886                 if ( $wgUseAjax ) {
 887                         $this->addScriptFile( 'ajax.js' );
 888
 889                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
 890
 891                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
 892                                 $this->addScriptFile( 'ajaxwatch.js' );
 893                         }
 894
 895                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
 896                                 $this->addScriptFile( 'mwsuggest.js' );
 897                         }
 898                 }
 899
 900                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
 901                         $this->addScriptFile( 'rightclickedit.js' );
 902                 }
 903
 904                 # Buffer output; final headers may depend on later processing
 905                 ob_start();
 906
 907                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 908                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
 909
 910                 if ($this->mArticleBodyOnly) {
 911                         $this->out($this->mBodytext);
 912                 } else {
 913                         // Hook that allows last minute changes to the output page, e.g.
 914                         // adding of CSS or Javascript by extensions.
 915                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
 916
 917                         wfProfileIn( 'Output-skin' );
 918                         $sk->outputPage( $this );
 919                         wfProfileOut( 'Output-skin' );
 920                 }
 921
 922                 $this->sendCacheControl();
 923                 ob_end_flush();
 924                 wfProfileOut( __METHOD__ );
 925         }
 926
 927         /**
 928          * @todo document
 929          * @param string $ins
 930          */
 931         public function out( $ins ) {
 932                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 933                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 934                         $outs = $ins;
 935                 } else {
 936                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 937                         if ( false === $outs ) { $outs = $ins; }
 938                 }
 939                 print $outs;
 940         }
 941
 942         /**
 943          * @todo document
 944          */
 945         public static function setEncodings() {
 946                 global $wgInputEncoding, $wgOutputEncoding;
 947                 global $wgUser, $wgContLang;
 948
 949                 $wgInputEncoding = strtolower( $wgInputEncoding );
 950
 951                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 952                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 953                         return;
 954                 }
 955                 $wgOutputEncoding = $wgInputEncoding;
 956         }
 957
 958         /**
 959          * Deprecated, use wfReportTime() instead.
 960          * @return string
 961          * @deprecated
 962          */
 963         public function reportTime() {
 964                 wfDeprecated( __METHOD__ );
 965                 $time = wfReportTime();
 966                 return $time;
 967         }
 968
 969         /**
 970          * Produce a "user is blocked" page.
 971          *
 972          * @param bool $return Whether to have a "return to $wgTitle" message or not.
 973          * @return nothing
 974          */
 975         function blockedPage( $return = true ) {
 976                 global $wgUser, $wgContLang, $wgTitle, $wgLang;
 977
 978                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
 979                 $this->setRobotPolicy( 'noindex,nofollow' );
 980                 $this->setArticleRelated( false );
 981
 982                 $name = User::whoIs( $wgUser->blockedBy() );
 983                 $reason = $wgUser->blockedFor();
 984                 if( $reason == '' ) {
 985                         $reason = wfMsg( 'blockednoreason' );
 986                 }
 987                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
 988                 $ip = wfGetIP();
 989
 990                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 991
 992                 $blockid = $wgUser->mBlock->mId;
 993
 994                 $blockExpiry = $wgUser->mBlock->mExpiry;
 995                 if ( $blockExpiry == 'infinity' ) {
 996                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
 997                         // Search for localization in 'ipboptions'
 998                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
 999                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1000                                 if ( strpos( $option, ":" ) === false )
1001                                         continue;
1002                                 list( $show, $value ) = explode( ":", $option );
1003                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1004                                         $blockExpiry = $show;
1005                                         break;
1006                                 }
1007                         }
1008                 } else {
1009                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
1010                 }
1011
1012                 if ( $wgUser->mBlock->mAuto ) {
1013                         $msg = 'autoblockedtext';
1014                 } else {
1015                         $msg = 'blockedtext';
1016                 }
1017
1018                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1019                  * This could be a username, an ip range, or a single ip. */
1020                 $intended = $wgUser->mBlock->mAddress;
1021
1022                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
1023
1024                 # Don't auto-return to special pages
1025                 if( $return ) {
1026                         $return = $wgTitle->getNamespace() > -1 ? $wgTitle : NULL;
1027                         $this->returnToMain( null, $return );
1028                 }
1029         }
1030
1031         /**
1032          * Output a standard error page
1033          *
1034          * @param string $title Message key for page title
1035          * @param string $msg Message key for page text
1036          * @param array $params Message parameters
1037          */
1038         public function showErrorPage( $title, $msg, $params = array() ) {
1039                 global $wgTitle;
1040                 if ( isset($wgTitle) ) {
1041                         $this->mDebugtext .= 'Original title: ' . $wgTitle->getPrefixedText() . "\n";
1042                 }
1043                 $this->setPageTitle( wfMsg( $title ) );
1044                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1045                 $this->setRobotPolicy( 'noindex,nofollow' );
1046                 $this->setArticleRelated( false );
1047                 $this->enableClientCache( false );
1048                 $this->mRedirect = '';
1049                 $this->mBodytext = '';
1050
1051                 array_unshift( $params, 'parse' );
1052                 array_unshift( $params, $msg );
1053                 $this->addHtml( call_user_func_array( 'wfMsgExt', $params ) );
1054
1055                 $this->returnToMain();
1056         }
1057
1058         /**
1059          * Output a standard permission error page
1060          *
1061          * @param array $errors Error message keys
1062          */
1063         public function showPermissionsErrorPage( $errors, $action = null )
1064         {
1065                 global $wgTitle;
1066
1067                 $this->mDebugtext .= 'Original title: ' .
1068                 $wgTitle->getPrefixedText() . "\n";
1069                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1070                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1071                 $this->setRobotPolicy( 'noindex,nofollow' );
1072                 $this->setArticleRelated( false );
1073                 $this->enableClientCache( false );
1074                 $this->mRedirect = '';
1075                 $this->mBodytext = '';
1076                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1077         }
1078
1079         /** @deprecated */
1080         public function errorpage( $title, $msg ) {
1081                 wfDeprecated( __METHOD__ );
1082                 throw new ErrorPageError( $title, $msg );
1083         }
1084
1085         /**
1086          * Display an error page indicating that a given version of MediaWiki is
1087          * required to use it
1088          *
1089          * @param mixed $version The version of MediaWiki needed to use the page
1090          */
1091         public function versionRequired( $version ) {
1092                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1093                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1094                 $this->setRobotPolicy( 'noindex,nofollow' );
1095                 $this->setArticleRelated( false );
1096                 $this->mBodytext = '';
1097
1098                 $this->addWikiMsg( 'versionrequiredtext', $version );
1099                 $this->returnToMain();
1100         }
1101
1102         /**
1103          * Display an error page noting that a given permission bit is required.
1104          *
1105          * @param string $permission key required
1106          */
1107         public function permissionRequired( $permission ) {
1108                 global $wgUser;
1109
1110                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1111                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1112                 $this->setRobotPolicy( 'noindex,nofollow' );
1113                 $this->setArticleRelated( false );
1114                 $this->mBodytext = '';
1115
1116                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1117                         User::getGroupsWithPermission( $permission ) );
1118                 if( $groups ) {
1119                         $this->addWikiMsg( 'badaccess-groups',
1120                                 implode( ', ', $groups ),
1121                                 count( $groups) );
1122                 } else {
1123                         $this->addWikiMsg( 'badaccess-group0' );
1124                 }
1125                 $this->returnToMain();
1126         }
1127
1128         /**
1129          * Use permissionRequired.
1130          * @deprecated
1131          */
1132         public function sysopRequired() {
1133                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1134         }
1135
1136         /**
1137          * Use permissionRequired.
1138          * @deprecated
1139          */
1140         public function developerRequired() {
1141                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1142         }
1143
1144         /**
1145          * Produce the stock "please login to use the wiki" page
1146          */
1147         public function loginToUse() {
1148                 global $wgUser, $wgTitle, $wgContLang;
1149
1150                 if( $wgUser->isLoggedIn() ) {
1151                         $this->permissionRequired( 'read' );
1152                         return;
1153                 }
1154
1155                 $skin = $wgUser->getSkin();
1156
1157                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1158                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1159                 $this->setRobotPolicy( 'noindex,nofollow' );
1160                 $this->setArticleFlag( false );
1161
1162                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1163                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1164                 $this->addHtml( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1165                 $this->addHtml( "\n<!--" . $wgTitle->getPrefixedUrl() . "-->" );
1166
1167                 # Don't return to the main page if the user can't read it
1168                 # otherwise we'll end up in a pointless loop
1169                 $mainPage = Title::newMainPage();
1170                 if( $mainPage->userCanRead() )
1171                         $this->returnToMain( null, $mainPage );
1172         }
1173
1174         /** @deprecated */
1175         public function databaseError( $fname, $sql, $error, $errno ) {
1176                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1177         }
1178
1179         /**
1180          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1181          * @return string The wikitext error-messages, formatted into a list.
1182          */
1183         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1184                 if ($action == null) {
1185                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1186                 } else {
1187                         global $wgLang;
1188                         $action_desc = wfMsg( "right-$action" );
1189                         $action_desc = $wgLang->lcfirst( $action_desc ); // FIXME: TERRIBLE HACK
1190                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1191                 }
1192
1193                 if (count( $errors ) > 1) {
1194                         $text .= '<ul class="permissions-errors">' . "\n";
1195
1196                         foreach( $errors as $error )
1197                         {
1198                                 $text .= '<li>';
1199                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1200                                 $text .= "</li>\n";
1201                         }
1202                         $text .= '</ul>';
1203                 } else {
1204                         $text .= '<div class="permissions-errors">' . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . '</div>';
1205                 }
1206
1207                 return $text;
1208         }
1209
1210         /**
1211          * Display a page stating that the Wiki is in read-only mode,
1212          * and optionally show the source of the page that the user
1213          * was trying to edit.  Should only be called (for this
1214          * purpose) after wfReadOnly() has returned true.
1215          *
1216          * For historical reasons, this function is _also_ used to
1217          * show the error message when a user tries to edit a page
1218          * they are not allowed to edit.  (Unless it's because they're
1219          * blocked, then we show blockedPage() instead.)  In this
1220          * case, the second parameter should be set to true and a list
1221          * of reasons supplied as the third parameter.
1222          *
1223          * @todo Needs to be split into multiple functions.
1224          *
1225          * @param string $source    Source code to show (or null).
1226          * @param bool   $protected Is this a permissions error?
1227          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1228          */
1229         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1230                 global $wgUser, $wgTitle;
1231                 $skin = $wgUser->getSkin();
1232
1233                 $this->setRobotPolicy( 'noindex,nofollow' );
1234                 $this->setArticleRelated( false );
1235
1236                 // If no reason is given, just supply a default "I can't let you do
1237                 // that, Dave" message.  Should only occur if called by legacy code.
1238                 if ( $protected && empty($reasons) ) {
1239                         $reasons[] = array( 'badaccess-group0' );
1240                 }
1241
1242                 if ( !empty($reasons) ) {
1243                         // Permissions error
1244                         if( $source ) {
1245                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1246                                 $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
1247                         } else {
1248                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1249                         }
1250                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1251                 } else {
1252                         // Wiki is read only
1253                         $this->setPageTitle( wfMsg( 'readonly' ) );
1254                         $reason = wfReadOnlyReason();
1255                         $this->wrapWikiMsg( '<div class="mw-readonly-error">$1</div>', array( 'readonlytext', $reason ) );
1256                 }
1257
1258                 // Show source, if supplied
1259                 if( is_string( $source ) ) {
1260                         $this->addWikiMsg( 'viewsourcetext' );
1261                         $text = Xml::openElement( 'textarea',
1262                                                 array( 'id'   => 'wpTextbox1',
1263                                                        'name' => 'wpTextbox1',
1264                                                        'cols' => $wgUser->getOption( 'cols' ),
1265                                                        'rows' => $wgUser->getOption( 'rows' ),
1266                                                        'readonly' => 'readonly' ) );
1267                         $text .= htmlspecialchars( $source );
1268                         $text .= Xml::closeElement( 'textarea' );
1269                         $this->addHTML( $text );
1270
1271                         // Show templates used by this article
1272                         $skin = $wgUser->getSkin();
1273                         $article = new Article( $wgTitle );
1274                         $this->addHTML( "<div class='templatesUsed'>
1275 {$skin->formatTemplates( $article->getUsedTemplates() )}
1276 </div>
1277 " );
1278                 }
1279
1280                 # If the title doesn't exist, it's fairly pointless to print a return
1281                 # link to it.  After all, you just tried editing it and couldn't, so
1282                 # what's there to do there?
1283                 if( $wgTitle->exists() ) {
1284                         $this->returnToMain( null, $wgTitle );
1285                 }
1286         }
1287
1288         /** @deprecated */
1289         public function fatalError( $message ) {
1290                 wfDeprecated( __METHOD__ );
1291                 throw new FatalError( $message );
1292         }
1293
1294         /** @deprecated */
1295         public function unexpectedValueError( $name, $val ) {
1296                 wfDeprecated( __METHOD__ );
1297                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1298         }
1299
1300         /** @deprecated */
1301         public function fileCopyError( $old, $new ) {
1302                 wfDeprecated( __METHOD__ );
1303                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1304         }
1305
1306         /** @deprecated */
1307         public function fileRenameError( $old, $new ) {
1308                 wfDeprecated( __METHOD__ );
1309                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1310         }
1311
1312         /** @deprecated */
1313         public function fileDeleteError( $name ) {
1314                 wfDeprecated( __METHOD__ );
1315                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1316         }
1317
1318         /** @deprecated */
1319         public function fileNotFoundError( $name ) {
1320                 wfDeprecated( __METHOD__ );
1321                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1322         }
1323
1324         public function showFatalError( $message ) {
1325                 $this->setPageTitle( wfMsg( "internalerror" ) );
1326                 $this->setRobotPolicy( "noindex,nofollow" );
1327                 $this->setArticleRelated( false );
1328                 $this->enableClientCache( false );
1329                 $this->mRedirect = '';
1330                 $this->mBodytext = $message;
1331         }
1332
1333         public function showUnexpectedValueError( $name, $val ) {
1334                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1335         }
1336
1337         public function showFileCopyError( $old, $new ) {
1338                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1339         }
1340
1341         public function showFileRenameError( $old, $new ) {
1342                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1343         }
1344
1345         public function showFileDeleteError( $name ) {
1346                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1347         }
1348
1349         public function showFileNotFoundError( $name ) {
1350                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1351         }
1352
1353         /**
1354          * Add a "return to" link pointing to a specified title
1355          *
1356          * @param Title $title Title to link
1357          */
1358         public function addReturnTo( $title ) {
1359                 global $wgUser;
1360                 $link = wfMsg( 'returnto', $wgUser->getSkin()->makeLinkObj( $title ) );
1361                 $this->addHtml( "<p>{$link}</p>\n" );
1362         }
1363
1364         /**
1365          * Add a "return to" link pointing to a specified title,
1366          * or the title indicated in the request, or else the main page
1367          *
1368          * @param null $unused No longer used
1369          * @param Title $returnto Title to return to
1370          */
1371         public function returnToMain( $unused = null, $returnto = NULL ) {
1372                 global $wgRequest;
1373
1374                 if ( $returnto == NULL ) {
1375                         $returnto = $wgRequest->getText( 'returnto' );
1376                 }
1377
1378                 if ( '' === $returnto ) {
1379                         $returnto = Title::newMainPage();
1380                 }
1381
1382                 if ( is_object( $returnto ) ) {
1383                         $titleObj = $returnto;
1384                 } else {
1385                         $titleObj = Title::newFromText( $returnto );
1386                 }
1387                 if ( !is_object( $titleObj ) ) {
1388                         $titleObj = Title::newMainPage();
1389                 }
1390
1391                 $this->addReturnTo( $titleObj );
1392         }
1393
1394         /**
1395          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
1396          * and uses the first 10 of them for META keywords
1397          *
1398          * @param ParserOutput &$parserOutput
1399          */
1400         private function addKeywords( &$parserOutput ) {
1401                 global $wgTitle;
1402                 $this->addKeyword( $wgTitle->getPrefixedText() );
1403                 $count = 1;
1404                 $links2d =& $parserOutput->getLinks();
1405                 if ( !is_array( $links2d ) ) {
1406                         return;
1407                 }
1408                 foreach ( $links2d as $dbkeys ) {
1409                         foreach( $dbkeys as $dbkey => $unused ) {
1410                                 $this->addKeyword( $dbkey );
1411                                 if ( ++$count > 10 ) {
1412                                         break 2;
1413                                 }
1414                         }
1415                 }
1416         }
1417
1418         /**
1419          * @return string The doctype, opening <html>, and head element.
1420          */
1421         public function headElement( Skin $sk ) {
1422                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1423                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1424                 global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle, $wgStyleVersion;
1425
1426                 $this->addMeta( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" );
1427                 $this->addStyle( 'common/wikiprintable.css', 'print' );
1428                 $sk->setupUserCss( $this );
1429
1430                 $ret = '';
1431
1432                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1433                         $ret .= "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
1434                 }
1435
1436                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1437
1438                 if ( '' == $this->getHTMLTitle() ) {
1439                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1440                 }
1441
1442                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
1443                 $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1444                 foreach($wgXhtmlNamespaces as $tag => $ns) {
1445                         $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1446                 }
1447                 $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
1448                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n\t\t";
1449                 $ret .= implode( "\t\t", array(
1450                         $this->getHeadLinks(),
1451                         $this->buildCssLinks(),
1452                         $sk->getHeadScripts( $this->mAllowUserJs ),
1453                         $this->mScripts,
1454                         $this->getHeadItems(),
1455                 ));
1456                 if( $sk->usercss ){
1457                         $ret .= "<style type='text/css'>{$sk->usercss}</style>";
1458                 }
1459
1460                 if ($wgUseTrackbacks && $this->isArticleRelated())
1461                         $ret .= $wgTitle->trackbackRDF();
1462
1463                 $ret .= "</head>\n";
1464                 return $ret;
1465         }
1466
1467         protected function addDefaultMeta() {
1468                 global $wgVersion;
1469                 $this->addMeta( "generator", "MediaWiki $wgVersion" );
1470
1471                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
1472                 if( $p !== 'index,follow' ) {
1473                         // http://www.robotstxt.org/wc/meta-user.html
1474                         // Only show if it's different from the default robots policy
1475                         $this->addMeta( 'robots', $p );
1476                 }
1477
1478                 if ( count( $this->mKeywords ) > 0 ) {
1479                         $strip = array(
1480                                 "/<.*?>/" => '',
1481                                 "/_/" => ' '
1482                         );
1483                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
1484                 }
1485         }
1486
1487         /**
1488          * @return string HTML tag links to be put in the header.
1489          */
1490         public function getHeadLinks() {
1491                 global $wgRequest, $wgFeed;
1492
1493                 // Ideally this should happen earlier, somewhere. :P
1494                 $this->addDefaultMeta();
1495
1496                 $tags = array();
1497
1498                 foreach ( $this->mMetatags as $tag ) {
1499                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1500                                 $a = 'http-equiv';
1501                                 $tag[0] = substr( $tag[0], 5 );
1502                         } else {
1503                                 $a = 'name';
1504                         }
1505                         $tags[] = Xml::element( 'meta',
1506                                 array(
1507                                         $a => $tag[0],
1508                                         'content' => $tag[1] ) );
1509                 }
1510                 foreach ( $this->mLinktags as $tag ) {
1511                         $tags[] = Xml::element( 'link', $tag );
1512                 }
1513
1514                 if( $wgFeed ) {
1515                         global $wgTitle;
1516                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1517                                 # Use the page name for the title (accessed through $wgTitle since
1518                                 # there's no other way).  In principle, this could lead to issues
1519                                 # with having the same name for different feeds corresponding to
1520                                 # the same page, but we can't avoid that at this low a level.
1521
1522                                 $tags[] = $this->feedLink(
1523                                         $format,
1524                                         $link,
1525                                         wfMsg( "page-{$format}-feed", $wgTitle->getPrefixedText() ) ); # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1526                         }
1527
1528                         # Recent changes feed should appear on every page (except recentchanges,
1529                         # that would be redundant). Put it after the per-page feed to avoid
1530                         # changing existing behavior. It's still available, probably via a
1531                         # menu in your browser. Some sites might have a different feed they'd
1532                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
1533                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
1534                         # If so, use it instead.
1535
1536                         global $wgOverrideSiteFeed, $wgSitename, $wgFeedClasses;
1537                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1538
1539                         if ( $wgOverrideSiteFeed ) {
1540                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
1541                                         $tags[] = $this->feedLink (
1542                                                 $type,
1543                                                 htmlspecialchars( $feedUrl ),
1544                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
1545                                 }
1546                         }
1547                         else if ( $wgTitle->getPrefixedText() != $rctitle->getPrefixedText() ) {
1548                                 foreach( $wgFeedClasses as $format => $class ) {
1549                                         $tags[] = $this->feedLink(
1550                                                 $format,
1551                                                 $rctitle->getFullURL( "feed={$format}" ),
1552                                                 wfMsg( "site-{$format}-feed", $wgSitename ) ); # For grep: 'site-rss-feed', 'site-atom-feed'.
1553                                 }
1554                         }
1555                 }
1556
1557                 return implode( "\n\t\t", $tags ) . "\n";
1558         }
1559
1560         /**
1561          * Return URLs for each supported syndication format for this page.
1562          * @return array associating format keys with URLs
1563          */
1564         public function getSyndicationLinks() {
1565                 global $wgTitle, $wgFeedClasses;
1566                 $links = array();
1567
1568                 if( $this->isSyndicated() ) {
1569                         if( is_string( $this->getFeedAppendQuery() ) ) {
1570                                 $appendQuery = "&" . $this->getFeedAppendQuery();
1571                         } else {
1572                                 $appendQuery = "";
1573                         }
1574
1575                         foreach( $wgFeedClasses as $format => $class ) {
1576                                 $links[$format] = $wgTitle->getLocalUrl( "feed=$format{$appendQuery}" );
1577                         }
1578                 }
1579                 return $links;
1580         }
1581
1582         /**
1583          * Generate a <link rel/> for an RSS feed.
1584          */
1585         private function feedLink( $type, $url, $text ) {
1586                 return Xml::element( 'link', array(
1587                         'rel' => 'alternate',
1588                         'type' => "application/$type+xml",
1589                         'title' => $text,
1590                         'href' => $url ) );
1591         }
1592
1593         /**
1594          * Add a local or specified stylesheet, with the given media options.
1595          * Meant primarily for internal use...
1596          *
1597          * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
1598          * @param $conditional -- for IE conditional comments, specifying an IE version
1599          * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
1600          */
1601         public function addStyle( $style, $media='', $condition='', $dir='' ) {
1602                 $options = array();
1603                 if( $media )
1604                         $options['media'] = $media;
1605                 if( $condition )
1606                         $options['condition'] = $condition;
1607                 if( $dir )
1608                         $options['dir'] = $dir;
1609                 $this->styles[$style] = $options;
1610         }
1611
1612         /**
1613          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
1614          * These will be applied to various media & IE conditionals.
1615          */
1616         public function buildCssLinks() {
1617                 $links = array();
1618                 foreach( $this->styles as $file => $options ) {
1619                         $link = $this->styleLink( $file, $options );
1620                         if( $link )
1621                                 $links[] = $link;
1622                 }
1623
1624                 return implode( "\n\t\t", $links );
1625         }
1626
1627         protected function styleLink( $style, $options ) {
1628                 global $wgRequest;
1629
1630                 if( isset( $options['dir'] ) ) {
1631                         global $wgContLang;
1632                         $siteDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
1633                         if( $siteDir != $options['dir'] )
1634                                 return '';
1635                 }
1636
1637                 if( isset( $options['media'] ) ) {
1638                         $media = $this->transformCssMedia( $options['media'] );
1639                         if( is_null( $media ) ) {
1640                                 return '';
1641                         }
1642                 } else {
1643                         $media = '';
1644                 }
1645
1646                 if( substr( $style, 0, 1 ) == '/' ||
1647                         substr( $style, 0, 5 ) == 'http:' ||
1648                         substr( $style, 0, 6 ) == 'https:' ) {
1649                         $url = $style;
1650                 } else {
1651                         global $wgStylePath, $wgStyleVersion;
1652                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
1653                 }
1654
1655                 $attribs = array(
1656                         'rel' => 'stylesheet',
1657                         'href' => $url,
1658                         'type' => 'text/css' );
1659                 if( $media ) {
1660                         $attribs['media'] = $media;
1661                 }
1662
1663                 $link = Xml::element( 'link', $attribs );
1664
1665                 if( isset( $options['condition'] ) ) {
1666                         $condition = htmlspecialchars( $options['condition'] );
1667                         $link = "<!--[if $condition]>$link<![endif]-->";
1668                 }
1669                 return $link;
1670         }
1671
1672         function transformCssMedia( $media ) {
1673                 global $wgRequest, $wgHandheldForIPhone;
1674
1675                 // Switch in on-screen display for media testing
1676                 $switches = array(
1677                         'printable' => 'print',
1678                         'handheld' => 'handheld',
1679                 );
1680                 foreach( $switches as $switch => $targetMedia ) {
1681                         if( $wgRequest->getBool( $switch ) ) {
1682                                 if( $media == $targetMedia ) {
1683                                         $media = '';
1684                                 } elseif( $media == 'screen' ) {
1685                                         return null;
1686                                 }
1687                         }
1688                 }
1689
1690                 // Expand longer media queries as iPhone doesn't grok 'handheld'
1691                 if( $wgHandheldForIPhone ) {
1692                         $mediaAliases = array(
1693                                 'screen' => 'screen and (min-device-width: 481px)',
1694                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
1695                         );
1696
1697                         if( isset( $mediaAliases[$media] ) ) {
1698                                 $media = $mediaAliases[$media];
1699                         }
1700                 }
1701
1702                 return $media;
1703         }
1704
1705         /**
1706          * Turn off regular page output and return an error reponse
1707          * for when rate limiting has triggered.
1708          */
1709         public function rateLimited() {
1710                 global $wgTitle;
1711
1712                 $this->setPageTitle(wfMsg('actionthrottled'));
1713                 $this->setRobotPolicy( 'noindex,follow' );
1714                 $this->setArticleRelated( false );
1715                 $this->enableClientCache( false );
1716                 $this->mRedirect = '';
1717                 $this->clearHTML();
1718                 $this->setStatusCode(503);
1719                 $this->addWikiMsg( 'actionthrottledtext' );
1720
1721                 $this->returnToMain( null, $wgTitle );
1722         }
1723
1724         /**
1725          * Show an "add new section" link?
1726          *
1727          * @return bool
1728          */
1729         public function showNewSectionLink() {
1730                 return $this->mNewSectionLink;
1731         }
1732
1733         /**
1734          * Show a warning about slave lag
1735          *
1736          * If the lag is higher than $wgSlaveLagCritical seconds,
1737          * then the warning is a bit more obvious. If the lag is
1738          * lower than $wgSlaveLagWarning, then no warning is shown.
1739          *
1740          * @param int $lag Slave lag
1741          */
1742         public function showLagWarning( $lag ) {
1743                 global $wgSlaveLagWarning, $wgSlaveLagCritical;
1744                 if( $lag >= $wgSlaveLagWarning ) {
1745                         $message = $lag < $wgSlaveLagCritical
1746                                 ? 'lag-warn-normal'
1747                                 : 'lag-warn-high';
1748                         $warning = wfMsgExt( $message, 'parse', $lag );
1749                         $this->addHtml( "<div class=\"mw-{$message}\">\n{$warning}\n</div>\n" );
1750                 }
1751         }
1752
1753         /**
1754          * Add a wikitext-formatted message to the output.
1755          * This is equivalent to:
1756          *
1757          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
1758          */
1759         public function addWikiMsg( /*...*/ ) {
1760                 $args = func_get_args();
1761                 $name = array_shift( $args );
1762                 $this->addWikiMsgArray( $name, $args );
1763         }
1764
1765         /**
1766          * Add a wikitext-formatted message to the output.
1767          * Like addWikiMsg() except the parameters are taken as an array
1768          * instead of a variable argument list.
1769          *
1770          * $options is passed through to wfMsgExt(), see that function for details.
1771          */
1772         public function addWikiMsgArray( $name, $args, $options = array() ) {
1773                 $options[] = 'parse';
1774                 $text = wfMsgExt( $name, $options, $args );
1775                 $this->addHTML( $text );
1776         }
1777
1778         /**
1779          * This function takes a number of message/argument specifications, wraps them in
1780          * some overall structure, and then parses the result and adds it to the output.
1781          *
1782          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
1783          * on. The subsequent arguments may either be strings, in which case they are the
1784          * message names, or an arrays, in which case the first element is the message name,
1785          * and subsequent elements are the parameters to that message.
1786          *
1787          * The special named parameter 'options' in a message specification array is passed
1788          * through to the $options parameter of wfMsgExt().
1789          *
1790          * Don't use this for messages that are not in users interface language.
1791          *
1792          * For example:
1793          *
1794          *    $wgOut->wrapWikiMsg( '<div class="error">$1</div>', 'some-error' );
1795          *
1796          * Is equivalent to:
1797          *
1798          *    $wgOut->addWikiText( '<div class="error">' . wfMsgNoTrans( 'some-error' ) . '</div>' );
1799          */
1800         public function wrapWikiMsg( $wrap /*, ...*/ ) {
1801                 $msgSpecs = func_get_args();
1802                 array_shift( $msgSpecs );
1803                 $msgSpecs = array_values( $msgSpecs );
1804                 $s = $wrap;
1805                 foreach ( $msgSpecs as $n => $spec ) {
1806                         $options = array();
1807                         if ( is_array( $spec ) ) {
1808                                 $args = $spec;
1809                                 $name = array_shift( $args );
1810                                 if ( isset( $args['options'] ) ) {
1811                                         $options = $args['options'];
1812                                         unset( $args['options'] );
1813                                 }
1814                         }  else {
1815                                 $args = array();
1816                                 $name = $spec;
1817                         }
1818                         $s = str_replace( '$' . ($n+1), wfMsgExt( $name, $options, $args ), $s );
1819                 }
1820                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
1821         }
1822 }