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(), $mCategories = array(), $mLanguageLinks = array();
  16
  17         var $mScripts = '', $mLinkColours, $mPageLinkTitle = '', $mHeadItems = array();
  18         var $mInlineMsg = array();
  19
  20         var $mTemplateIds = array();
  21
  22         var $mAllowUserJs;
  23         var $mSuppressQuickbar = false;
  24         var $mOnloadHandler = '';
  25         var $mDoNothing = false;
  26         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
  27         var $mIsArticleRelated = true;
  28         protected $mParserOptions = null; // lazy initialised, use parserOptions()
  29
  30         var $mFeedLinks = array();
  31
  32         var $mEnableClientCache = true;
  33         var $mArticleBodyOnly = false;
  34
  35         var $mNewSectionLink = false;
  36         var $mHideNewSectionLink = false;
  37         var $mNoGallery = false;
  38         var $mPageTitleActionText = '';
  39         var $mParseWarnings = array();
  40         var $mSquidMaxage = 0;
  41         var $mRevisionId = null;
  42         protected $mTitle = null;
  43
  44         /**
  45          * An array of stylesheet filenames (relative from skins path), with options
  46          * for CSS media, IE conditions, and RTL/LTR direction.
  47          * For internal use; add settings in the skin via $this->addStyle()
  48          */
  49         var $styles = array();
  50
  51         private $mIndexPolicy = 'index';
  52         private $mFollowPolicy = 'follow';
  53         private $mVaryHeader = array( 'Accept-Encoding' => array('list-contains=gzip'),
  54                                                                   'Cookie' => null );
  55
  56         /**
  57          * Constructor
  58          * Initialise private variables
  59          */
  60         function __construct() {
  61                 global $wgAllowUserJs;
  62                 $this->mAllowUserJs = $wgAllowUserJs;
  63         }
  64
  65         public function redirect( $url, $responsecode = '302' ) {
  66                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  67                 $this->mRedirect = str_replace( "\n", '', $url );
  68                 $this->mRedirectCode = $responsecode;
  69         }
  70
  71         public function getRedirect() {
  72                 return $this->mRedirect;
  73         }
  74
  75         /**
  76          * Set the HTTP status code to send with the output.
  77          *
  78          * @param int $statusCode
  79          * @return nothing
  80          */
  81         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  82
  83         /**
  84          * Add a new <meta> tag
  85          * To add an http-equiv meta tag, precede the name with "http:"
  86          *
  87          * @param $name tag name
  88          * @param $val tag value
  89          */
  90         function addMeta( $name, $val ) {
  91                 array_push( $this->mMetatags, array( $name, $val ) );
  92         }
  93
  94         function addKeyword( $text ) {
  95                 if( is_array( $text )) {
  96                         $this->mKeywords = array_merge( $this->mKeywords, $text );
  97                 } else {
  98                         array_push( $this->mKeywords, $text );
  99                 }
 100         }
 101         function addScript( $script ) {
 102                 $this->mScripts .= $script . "\n";
 103         }
 104
 105         /**
 106          * Register and add a stylesheet from an extension directory.
 107          * @param $url String path to sheet.  Provide either a full url (beginning
 108          *             with 'http', etc) or a relative path from the document root
 109          *             (beginning with '/').  Otherwise it behaves identically to
 110          *             addStyle() and draws from the /skins folder.
 111          */
 112         public function addExtensionStyle( $url ) {
 113                 array_push( $this->mExtStyles, $url );
 114         }
 115
 116         /**
 117          * Add a JavaScript file out of skins/common, or a given relative path.
 118          * @param string $file filename in skins/common or complete on-server path (/foo/bar.js)
 119          */
 120         function addScriptFile( $file ) {
 121                 global $wgStylePath, $wgStyleVersion, $wgJsMimeType;
 122                 if( substr( $file, 0, 1 ) == '/' ) {
 123                         $path = $file;
 124                 } else {
 125                         $path =  "{$wgStylePath}/common/{$file}";
 126                 }
 127                 $this->addScript(
 128                         Xml::element( 'script',
 129                                 array(
 130                                         'type' => $wgJsMimeType,
 131                                         'src' => "$path?$wgStyleVersion",
 132                                 ),
 133                                 '', false
 134                         )
 135                 );
 136         }
 137
 138         /**
 139          * Add a self-contained script tag with the given contents
 140          * @param string $script JavaScript text, no <script> tags
 141          */
 142         function addInlineScript( $script ) {
 143                 $this->mScripts .= Html::inlineScript( "\n$script\n" ) . "\n";
 144         }
 145
 146         /**
 147          * Get all registered JS and CSS tags for the header.
 148          */
 149         function getScript() {
 150                 return $this->mScripts . $this->getHeadItems();
 151         }
 152
 153         function getHeadItems() {
 154                 $s = '';
 155                 foreach ( $this->mHeadItems as $item ) {
 156                         $s .= $item;
 157                 }
 158                 return $s;
 159         }
 160
 161         function addHeadItem( $name, $value ) {
 162                 $this->mHeadItems[$name] = $value;
 163         }
 164
 165         function hasHeadItem( $name ) {
 166                 return isset( $this->mHeadItems[$name] );
 167         }
 168
 169         function setETag($tag) { $this->mETag = $tag; }
 170         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 171         function getArticleBodyOnly() { return $this->mArticleBodyOnly; }
 172
 173         function addLink( $linkarr ) {
 174                 # $linkarr should be an associative array of attributes. We'll escape on output.
 175                 array_push( $this->mLinktags, $linkarr );
 176         }
 177
 178         # Get all links added by extensions
 179         function getExtStyle() {
 180                 return $this->mExtStyles;
 181         }
 182
 183         function addMetadataLink( $linkarr ) {
 184                 # note: buggy CC software only reads first "meta" link
 185                 static $haveMeta = false;
 186                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 187                 $this->addLink( $linkarr );
 188                 $haveMeta = true;
 189         }
 190
 191         /**
 192          * checkLastModified tells the client to use the client-cached page if
 193          * possible. If sucessful, the OutputPage is disabled so that
 194          * any future call to OutputPage->output() have no effect.
 195          *
 196          * Side effect: sets mLastModified for Last-Modified header
 197          *
 198          * @return bool True iff cache-ok headers was sent.
 199          */
 200         function checkLastModified( $timestamp ) {
 201                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 202
 203                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 204                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 205                         return false;
 206                 }
 207                 if( !$wgCachePages ) {
 208                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 209                         return false;
 210                 }
 211                 if( $wgUser->getOption( 'nocache' ) ) {
 212                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 213                         return false;
 214                 }
 215
 216                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 217                 $modifiedTimes = array(
 218                         'page' => $timestamp,
 219                         'user' => $wgUser->getTouched(),
 220                         'epoch' => $wgCacheEpoch
 221                 );
 222                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 223
 224                 $maxModified = max( $modifiedTimes );
 225                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 226
 227                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 228                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 229                         return false;
 230                 }
 231
 232                 # Make debug info
 233                 $info = '';
 234                 foreach ( $modifiedTimes as $name => $value ) {
 235                         if ( $info !== '' ) {
 236                                 $info .= ', ';
 237                         }
 238                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 239                 }
 240
 241                 # IE sends sizes after the date like this:
 242                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 243                 # this breaks strtotime().
 244                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 245
 246                 wfSuppressWarnings(); // E_STRICT system time bitching
 247                 $clientHeaderTime = strtotime( $clientHeader );
 248                 wfRestoreWarnings();
 249                 if ( !$clientHeaderTime ) {
 250                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 251                         return false;
 252                 }
 253                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 254
 255                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 256                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 257                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 258                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 259                 if( $clientHeaderTime < $maxModified ) {
 260                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 261                         return false;
 262                 }
 263
 264                 # Not modified
 265                 # Give a 304 response code and disable body output
 266                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 267                 ini_set('zlib.output_compression', 0);
 268                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 269                 $this->sendCacheControl();
 270                 $this->disable();
 271
 272                 // Don't output a compressed blob when using ob_gzhandler;
 273                 // it's technically against HTTP spec and seems to confuse
 274                 // Firefox when the response gets split over two packets.
 275                 wfClearOutputBuffers();
 276
 277                 return true;
 278         }
 279
 280         function setPageTitleActionText( $text ) {
 281                 $this->mPageTitleActionText = $text;
 282         }
 283
 284         function getPageTitleActionText () {
 285                 if ( isset( $this->mPageTitleActionText ) ) {
 286                         return $this->mPageTitleActionText;
 287                 }
 288         }
 289
 290         /**
 291          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 292          *
 293          * @param $policy string The literal string to output as the contents of
 294          *   the meta tag.  Will be parsed according to the spec and output in
 295          *   standardized form.
 296          * @return null
 297          */
 298         public function setRobotPolicy( $policy ) {
 299                 $policy = Article::formatRobotPolicy( $policy );
 300
 301                 if( isset( $policy['index'] ) ){
 302                         $this->setIndexPolicy( $policy['index'] );
 303                 }
 304                 if( isset( $policy['follow'] ) ){
 305                         $this->setFollowPolicy( $policy['follow'] );
 306                 }
 307         }
 308
 309         /**
 310          * Set the index policy for the page, but leave the follow policy un-
 311          * touched.
 312          *
 313          * @param $policy string Either 'index' or 'noindex'.
 314          * @return null
 315          */
 316         public function setIndexPolicy( $policy ) {
 317                 $policy = trim( $policy );
 318                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 319                         $this->mIndexPolicy = $policy;
 320                 }
 321         }
 322
 323         /**
 324          * Set the follow policy for the page, but leave the index policy un-
 325          * touched.
 326          *
 327          * @param $policy string Either 'follow' or 'nofollow'.
 328          * @return null
 329          */
 330         public function setFollowPolicy( $policy ) {
 331                 $policy = trim( $policy );
 332                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 333                         $this->mFollowPolicy = $policy;
 334                 }
 335         }
 336
 337         /**
 338          * "HTML title" means the contents of <title>. It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 339          */
 340         public function setHTMLTitle( $name ) {
 341                 $this->mHTMLtitle = $name;
 342         }
 343
 344         /**
 345          * "Page title" means the contents of <h1>. It is stored as a valid HTML fragment.
 346          * This function allows good tags like <sup> in the <h1> tag, but not bad tags like <script>.
 347          * This function automatically sets <title> to the same content as <h1> but with all tags removed.
 348          * Bad tags that were escaped in <h1> will still be escaped in <title>, and good tags like <i> will be dropped entirely.
 349          */
 350         public function setPageTitle( $name ) {
 351                 global $wgContLang;
 352
 353                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 354                 # but leave "<i>foobar</i>" alone
 355                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 356                 $this->mPagetitle = $nameWithTags;
 357
 358                 $taction =  $this->getPageTitleActionText();
 359                 if( !empty( $taction ) ) {
 360                         $name .= ' - '.$taction;
 361                 }
 362
 363                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 364                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 365         }
 366
 367         public function setTitle( $t ) {
 368                 $this->mTitle = $t;
 369         }
 370
 371         public function getTitle() {
 372                 if ( $this->mTitle instanceof Title ) {
 373                         return $this->mTitle;
 374                 }
 375                 else {
 376                         wfDebug( __METHOD__ . ' called and $mTitle is null. Return $wgTitle for sanity' );
 377                         global $wgTitle;
 378                         return $wgTitle;
 379                 }
 380         }
 381
 382         public function getHTMLTitle() { return $this->mHTMLtitle; }
 383         public function getPageTitle() { return $this->mPagetitle; }
 384         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 385         public function appendSubtitle( $str ) { $this->mSubtitle .= /*$this->parse(*/$str/*)*/; } // @bug 2514
 386         public function getSubtitle() { return $this->mSubtitle; }
 387         public function isArticle() { return $this->mIsarticle; }
 388         public function setPrintable() { $this->mPrintable = true; }
 389         public function isPrintable() { return $this->mPrintable; }
 390         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 391         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 392         public function getOnloadHandler() { return $this->mOnloadHandler; }
 393         public function disable() { $this->mDoNothing = true; }
 394         public function isDisabled() { return $this->mDoNothing; }
 395
 396         public function setSyndicated( $show = true ) {
 397                 if ( $show ) {
 398                         $this->setFeedAppendQuery( false );
 399                 } else {
 400                         $this->mFeedLinks = array();
 401                 }
 402         }
 403
 404         public function setFeedAppendQuery( $val ) {
 405                 global $wgFeedClasses, $wgAdvertisedFeedTypes;
 406
 407                 $this->mFeedLinks = array();
 408
 409                 foreach ( $wgAdvertisedFeedTypes as $type ) {
 410                         $query = "feed=$type";
 411                         if ( is_string( $val ) ) {
 412                                 $query .= '&' . $val;
 413                         }
 414                         $this->mFeedLinks[$type] = $this->getTitle()->getLocalURL( $query );
 415                 }
 416         }
 417
 418         public function addFeedLink( $format, $href ) {
 419                 $this->mFeedLinks[$format] = $href;
 420         }
 421
 422         public function isSyndicated() { return count($this->mFeedLinks); }
 423
 424         public function setArticleRelated( $v ) {
 425                 $this->mIsArticleRelated = $v;
 426                 if ( !$v ) {
 427                         $this->mIsarticle = false;
 428                 }
 429         }
 430         public function setArticleFlag( $v ) {
 431                 $this->mIsarticle = $v;
 432                 if ( $v ) {
 433                         $this->mIsArticleRelated = $v;
 434                 }
 435         }
 436
 437         public function isArticleRelated() { return $this->mIsArticleRelated; }
 438
 439         public function getLanguageLinks() { return $this->mLanguageLinks; }
 440         public function addLanguageLinks($newLinkArray) {
 441                 $this->mLanguageLinks += $newLinkArray;
 442         }
 443         public function setLanguageLinks($newLinkArray) {
 444                 $this->mLanguageLinks = $newLinkArray;
 445         }
 446
 447         public function getCategoryLinks() {
 448                 return $this->mCategoryLinks;
 449         }
 450
 451         public function getCategories() {
 452                 return $this->mCategories;
 453         }
 454
 455         /**
 456          * Add an array of categories, with names in the keys
 457          */
 458         public function addCategoryLinks( $categories ) {
 459                 global $wgUser, $wgContLang;
 460
 461                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 462                         return;
 463                 }
 464
 465                 # Add the links to a LinkBatch
 466                 $arr = array( NS_CATEGORY => $categories );
 467                 $lb = new LinkBatch;
 468                 $lb->setArray( $arr );
 469
 470                 # Fetch existence plus the hiddencat property
 471                 $dbr = wfGetDB( DB_SLAVE );
 472                 $pageTable = $dbr->tableName( 'page' );
 473                 $where = $lb->constructSet( 'page', $dbr );
 474                 $propsTable = $dbr->tableName( 'page_props' );
 475                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 476                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 477                 $res = $dbr->query( $sql, __METHOD__ );
 478
 479                 # Add the results to the link cache
 480                 $lb->addResultToCache( LinkCache::singleton(), $res );
 481
 482                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 483                 $categories = array_combine( array_keys( $categories ),
 484                         array_fill( 0, count( $categories ), 'normal' ) );
 485
 486                 # Mark hidden categories
 487                 foreach ( $res as $row ) {
 488                         if ( isset( $row->pp_value ) ) {
 489                                 $categories[$row->page_title] = 'hidden';
 490                         }
 491                 }
 492
 493                 # Add the remaining categories to the skin
 494                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 495                         $sk = $wgUser->getSkin();
 496                         foreach ( $categories as $category => $type ) {
 497                                 $origcategory = $category;
 498                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 499                                 $wgContLang->findVariantLink( $category, $title, true );
 500                                 if ( $category != $origcategory )
 501                                         if ( array_key_exists( $category, $categories ) )
 502                                                 continue;
 503                                 $text = $wgContLang->convertHtml( $title->getText() );
 504                                 $this->mCategories[] = $title->getText();
 505                                 $this->mCategoryLinks[$type][] = $sk->link( $title, $text );
 506                         }
 507                 }
 508         }
 509
 510         public function setCategoryLinks($categories) {
 511                 $this->mCategoryLinks = array();
 512                 $this->addCategoryLinks($categories);
 513         }
 514
 515         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 516         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 517
 518         public function disallowUserJs() { $this->mAllowUserJs = false; }
 519         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 520
 521         public function prependHTML( $text ) { $this->mBodytext = $text . $this->mBodytext; }
 522         public function addHTML( $text ) { $this->mBodytext .= $text; }
 523         public function clearHTML() { $this->mBodytext = ''; }
 524         public function getHTML() { return $this->mBodytext; }
 525         public function debug( $text ) { $this->mDebugtext .= $text; }
 526
 527         /* @deprecated */
 528         public function setParserOptions( $options ) {
 529                 wfDeprecated( __METHOD__ );
 530                 return $this->parserOptions( $options );
 531         }
 532
 533         public function parserOptions( $options = null ) {
 534                 if ( !$this->mParserOptions ) {
 535                         $this->mParserOptions = new ParserOptions;
 536                 }
 537                 return wfSetVar( $this->mParserOptions, $options );
 538         }
 539
 540         /**
 541          * Set the revision ID which will be seen by the wiki text parser
 542          * for things such as embedded {{REVISIONID}} variable use.
 543          * @param mixed $revid an integer, or NULL
 544          * @return mixed previous value
 545          */
 546         public function setRevisionId( $revid ) {
 547                 $val = is_null( $revid ) ? null : intval( $revid );
 548                 return wfSetVar( $this->mRevisionId, $val );
 549         }
 550
 551         public function getRevisionId() {
 552                 return $this->mRevisionId;
 553         }
 554
 555         /**
 556          * Convert wikitext to HTML and add it to the buffer
 557          * Default assumes that the current page title will
 558          * be used.
 559          *
 560          * @param string $text
 561          * @param bool   $linestart
 562          */
 563         public function addWikiText( $text, $linestart = true ) {
 564                 $title = $this->getTitle(); // Work arround E_STRICT
 565                 $this->addWikiTextTitle( $text, $title, $linestart );
 566         }
 567
 568         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 569                 $this->addWikiTextTitle($text, $title, $linestart);
 570         }
 571
 572         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 573                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 574         }
 575
 576         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 577                 global $wgParser;
 578
 579                 wfProfileIn( __METHOD__ );
 580
 581                 wfIncrStats( 'pcache_not_possible' );
 582
 583                 $popts = $this->parserOptions();
 584                 $oldTidy = $popts->setTidy( $tidy );
 585
 586                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 587                         $linestart, true, $this->mRevisionId );
 588
 589                 $popts->setTidy( $oldTidy );
 590
 591                 $this->addParserOutput( $parserOutput );
 592
 593                 wfProfileOut( __METHOD__ );
 594         }
 595
 596         /**
 597          * @todo document
 598          * @param ParserOutput object &$parserOutput
 599          */
 600         public function addParserOutputNoText( &$parserOutput ) {
 601                 global $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 602
 603                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 604                 $this->addCategoryLinks( $parserOutput->getCategories() );
 605                 $this->mNewSectionLink = $parserOutput->getNewSection();
 606                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
 607
 608                 $this->mParseWarnings = $parserOutput->getWarnings();
 609                 if ( $parserOutput->getCacheTime() == -1 ) {
 610                         $this->enableClientCache( false );
 611                 }
 612                 $this->mNoGallery = $parserOutput->getNoGallery();
 613                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 614                 // Versioning...
 615                 foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
 616                         if ( isset( $this->mTemplateIds[$ns] ) ) {
 617                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
 618                         } else {
 619                                 $this->mTemplateIds[$ns] = $dbks;
 620                         }
 621                 }
 622                 // Page title
 623                 $dt = $parserOutput->getDisplayTitle();
 624                 $title = $parserOutput->getTitleText();
 625                 if ( $dt !== false ) {
 626                         $this->setPageTitle( $dt );
 627                 }
 628                 else if ( $title != '' ) {
 629                         $this->setPageTitle( $title );
 630                 }
 631
 632                 // Hooks registered in the object
 633                 global $wgParserOutputHooks;
 634                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 635                         list( $hookName, $data ) = $hookInfo;
 636                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 637                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 638                         }
 639                 }
 640
 641                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 642         }
 643
 644         /**
 645          * @todo document
 646          * @param ParserOutput &$parserOutput
 647          */
 648         function addParserOutput( &$parserOutput ) {
 649                 $this->addParserOutputNoText( $parserOutput );
 650                 $text = $parserOutput->getText();
 651                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 652                 $this->addHTML( $text );
 653         }
 654
 655         /**
 656          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 657          * Saves the text into the parser cache if possible.
 658          *
 659          * @param string  $text
 660          * @param Article $article
 661          * @param bool    $cache
 662          * @deprecated Use Article::outputWikitext
 663          */
 664         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 665                 global $wgParser;
 666
 667                 wfDeprecated( __METHOD__ );
 668
 669                 $popts = $this->parserOptions();
 670                 $popts->setTidy(true);
 671                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 672                         $popts, true, true, $this->mRevisionId );
 673                 $popts->setTidy(false);
 674                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 675                         $parserCache = ParserCache::singleton();
 676                         $parserCache->save( $parserOutput, $article, $popts);
 677                 }
 678
 679                 $this->addParserOutput( $parserOutput );
 680         }
 681
 682         /**
 683          * @deprecated use addWikiTextTidy()
 684          */
 685         public function addSecondaryWikiText( $text, $linestart = true ) {
 686                 wfDeprecated( __METHOD__ );
 687                 $this->addWikiTextTitleTidy($text, $this->getTitle(), $linestart);
 688         }
 689
 690         /**
 691          * Add wikitext with tidy enabled
 692          */
 693         public function addWikiTextTidy(  $text, $linestart = true ) {
 694                 $title = $this->getTitle();
 695                 $this->addWikiTextTitleTidy($text, $title, $linestart);
 696         }
 697
 698
 699         /**
 700          * Add the output of a QuickTemplate to the output buffer
 701          *
 702          * @param QuickTemplate $template
 703          */
 704         public function addTemplate( &$template ) {
 705                 ob_start();
 706                 $template->execute();
 707                 $this->addHTML( ob_get_contents() );
 708                 ob_end_clean();
 709         }
 710
 711         /**
 712          * Parse wikitext and return the HTML.
 713          *
 714          * @param string $text
 715          * @param bool   $linestart Is this the start of a line?
 716          * @param bool   $interface ??
 717          */
 718         public function parse( $text, $linestart = true, $interface = false ) {
 719                 global $wgParser;
 720                 if( is_null( $this->getTitle() ) ) {
 721                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
 722                 }
 723                 $popts = $this->parserOptions();
 724                 if ( $interface) { $popts->setInterfaceMessage(true); }
 725                 $parserOutput = $wgParser->parse( $text, $this->getTitle(), $popts,
 726                         $linestart, true, $this->mRevisionId );
 727                 if ( $interface) { $popts->setInterfaceMessage(false); }
 728                 return $parserOutput->getText();
 729         }
 730
 731         /** Parse wikitext, strip paragraphs, and return the HTML. */
 732         public function parseInline( $text, $linestart = true, $interface = false ) {
 733                 $parsed = $this->parse( $text, $linestart, $interface );
 734
 735                 $m = array();
 736                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
 737                         $parsed = $m[1];
 738                 }
 739
 740                 return $parsed;
 741         }
 742
 743         /**
 744          * @param Article $article
 745          * @param User    $user
 746          *
 747          * @deprecated
 748          *
 749          * @return bool True if successful, else false.
 750          */
 751         public function tryParserCache( &$article ) {
 752                 wfDeprecated( __METHOD__ );
 753                 $parserOutput = ParserCache::singleton()->get( $article, $article->getParserOptions() );
 754
 755                 if ($parserOutput !== false) {
 756                         $this->addParserOutput( $parserOutput );
 757                         return true;
 758                 } else {
 759                         return false;
 760                 }
 761         }
 762
 763         /**
 764          * @param int $maxage Maximum cache time on the Squid, in seconds.
 765          */
 766         public function setSquidMaxage( $maxage ) {
 767                 $this->mSquidMaxage = $maxage;
 768         }
 769
 770         /**
 771          * Use enableClientCache(false) to force it to send nocache headers
 772          * @param $state ??
 773          */
 774         public function enableClientCache( $state ) {
 775                 return wfSetVar( $this->mEnableClientCache, $state );
 776         }
 777
 778         function getCacheVaryCookies() {
 779                 global $wgCookiePrefix, $wgCacheVaryCookies;
 780                 static $cookies;
 781                 if ( $cookies === null ) {
 782                         $cookies = array_merge(
 783                                 array(
 784                                         "{$wgCookiePrefix}Token",
 785                                         "{$wgCookiePrefix}LoggedOut",
 786                                         session_name()
 787                                 ),
 788                                 $wgCacheVaryCookies
 789                         );
 790                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 791                 }
 792                 return $cookies;
 793         }
 794
 795         function uncacheableBecauseRequestVars() {
 796                 global $wgRequest;
 797                 return  $wgRequest->getText('useskin', false) === false
 798                         && $wgRequest->getText('uselang', false) === false;
 799         }
 800
 801         /**
 802          * Check if the request has a cache-varying cookie header
 803          * If it does, it's very important that we don't allow public caching
 804          */
 805         function haveCacheVaryCookies() {
 806                 global $wgRequest;
 807                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 808                 if ( $cookieHeader === false ) {
 809                         return false;
 810                 }
 811                 $cvCookies = $this->getCacheVaryCookies();
 812                 foreach ( $cvCookies as $cookieName ) {
 813                         # Check for a simple string match, like the way squid does it
 814                         if ( strpos( $cookieHeader, $cookieName ) ) {
 815                                 wfDebug( __METHOD__.": found $cookieName\n" );
 816                                 return true;
 817                         }
 818                 }
 819                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 820                 return false;
 821         }
 822
 823         public function addVaryHeader( $header, $option = null ) {
 824                 if ( !array_key_exists( $header, $this->mVaryHeader ) ) {
 825                         $this->mVaryHeader[$header] = $option;
 826                 }
 827                 elseif( is_array( $option ) ) {
 828                         if( is_array( $this->mVaryHeader[$header] ) ) {
 829                                 $this->mVaryHeader[$header] = array_merge( $this->mVaryHeader[$header], $option );
 830                         }
 831                         else {
 832                                 $this->mVaryHeader[$header] = $option;
 833                         }
 834                 }
 835                 $this->mVaryHeader[$header] = array_unique( $this->mVaryHeader[$header] );
 836         }
 837
 838         /** Get a complete X-Vary-Options header */
 839         public function getXVO() {
 840                 $cvCookies = $this->getCacheVaryCookies();
 841
 842                 $cookiesOption = array();
 843                 foreach ( $cvCookies as $cookieName ) {
 844                         $cookiesOption[] = 'string-contains=' . $cookieName;
 845                 }
 846                 $this->addVaryHeader( 'Cookie', $cookiesOption );
 847
 848                 $headers = array();
 849                 foreach( $this->mVaryHeader as $header => $option ) {
 850                         $newheader = $header;
 851                         if( is_array( $option ) )
 852                                 $newheader .= ';' . implode( ';', $option );
 853                         $headers[] = $newheader;
 854                 }
 855                 $xvo = 'X-Vary-Options: ' . implode( ',', $headers );
 856
 857                 return $xvo;
 858         }
 859
 860         /** bug 21672: Add Accept-Language to Vary and XVO headers
 861                 if there's no 'variant' parameter existed in GET.
 862
 863                 For example:
 864                  /w/index.php?title=Main_page should always be served; but
 865                  /w/index.php?title=Main_page&variant=zh-cn should never be served.
 866
 867                 patched by Liangent and Philip */
 868         function addAcceptLanguage() {
 869                 global $wgRequest, $wgContLang;
 870                 if( !$wgRequest->getCheck('variant') && $wgContLang->hasVariants() ) {
 871                         $variants = $wgContLang->getVariants();
 872                         $aloption = array();
 873                         foreach ( $variants as $variant ) {
 874                                 if( $variant === $wgContLang->getCode() )
 875                                         continue;
 876                                 else
 877                                         $aloption[] = "string-contains=$variant";
 878                         }
 879                         $this->addVaryHeader( 'Accept-Language', $aloption );
 880                 }
 881         }
 882
 883         public function sendCacheControl() {
 884                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest, $wgUseXVO;
 885
 886                 $response = $wgRequest->response();
 887                 if ($wgUseETag && $this->mETag)
 888                         $response->header("ETag: $this->mETag");
 889
 890                 $this->addAcceptLanguage();
 891
 892                 # don't serve compressed data to clients who can't handle it
 893                 # maintain different caches for logged-in users and non-logged in ones
 894                 $response->header( 'Vary: ' . join( ', ', array_keys( $this->mVaryHeader ) ) );
 895
 896                 if ( $wgUseXVO ) {
 897                         # Add an X-Vary-Options header for Squid with Wikimedia patches
 898                         $response->header( $this->getXVO() );
 899                 }
 900
 901                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
 902                         if( $wgUseSquid && session_id() == '' &&
 903                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
 904                         {
 905                                 if ( $wgUseESI ) {
 906                                         # We'll purge the proxy cache explicitly, but require end user agents
 907                                         # to revalidate against the proxy on each visit.
 908                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 909                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
 910                                         # start with a shorter timeout for initial testing
 911                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 912                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 913                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 914                                 } else {
 915                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 916                                         # to revalidate against the proxy on each visit.
 917                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 918                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 919                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
 920                                         # start with a shorter timeout for initial testing
 921                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 922                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 923                                 }
 924                         } else {
 925                                 # We do want clients to cache if they can, but they *must* check for updates
 926                                 # on revisiting the page.
 927                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
 928                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 929                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
 930                         }
 931                         if($this->mLastModified) {
 932                                 $response->header( "Last-Modified: {$this->mLastModified}" );
 933                         }
 934                 } else {
 935                         wfDebug( __METHOD__ . ": no caching **\n", false );
 936
 937                         # In general, the absence of a last modified header should be enough to prevent
 938                         # the client from using its cache. We send a few other things just to make sure.
 939                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 940                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 941                         $response->header( 'Pragma: no-cache' );
 942                 }
 943                 wfRunHooks('CacheHeadersAfterSet', array( $this ) );
 944         }
 945
 946         /**
 947          * Get the message associed with the HTTP response code $code
 948          *
 949          * @param $code Integer: status code
 950          * @return String or null: message or null if $code is not in the list of
 951          *         messages
 952          */
 953         public static function getStatusMessage( $code ) {
 954                 static $statusMessage = array(
 955                         100 => 'Continue',
 956                         101 => 'Switching Protocols',
 957                         102 => 'Processing',
 958                         200 => 'OK',
 959                         201 => 'Created',
 960                         202 => 'Accepted',
 961                         203 => 'Non-Authoritative Information',
 962                         204 => 'No Content',
 963                         205 => 'Reset Content',
 964                         206 => 'Partial Content',
 965                         207 => 'Multi-Status',
 966                         300 => 'Multiple Choices',
 967                         301 => 'Moved Permanently',
 968                         302 => 'Found',
 969                         303 => 'See Other',
 970                         304 => 'Not Modified',
 971                         305 => 'Use Proxy',
 972                         307 => 'Temporary Redirect',
 973                         400 => 'Bad Request',
 974                         401 => 'Unauthorized',
 975                         402 => 'Payment Required',
 976                         403 => 'Forbidden',
 977                         404 => 'Not Found',
 978                         405 => 'Method Not Allowed',
 979                         406 => 'Not Acceptable',
 980                         407 => 'Proxy Authentication Required',
 981                         408 => 'Request Timeout',
 982                         409 => 'Conflict',
 983                         410 => 'Gone',
 984                         411 => 'Length Required',
 985                         412 => 'Precondition Failed',
 986                         413 => 'Request Entity Too Large',
 987                         414 => 'Request-URI Too Large',
 988                         415 => 'Unsupported Media Type',
 989                         416 => 'Request Range Not Satisfiable',
 990                         417 => 'Expectation Failed',
 991                         422 => 'Unprocessable Entity',
 992                         423 => 'Locked',
 993                         424 => 'Failed Dependency',
 994                         500 => 'Internal Server Error',
 995                         501 => 'Not Implemented',
 996                         502 => 'Bad Gateway',
 997                         503 => 'Service Unavailable',
 998                         504 => 'Gateway Timeout',
 999                         505 => 'HTTP Version Not Supported',
1000                         507 => 'Insufficient Storage'
1001                 );
1002                 return isset( $statusMessage[$code] ) ? $statusMessage[$code] : null;
1003         }
1004
1005         /**
1006          * Finally, all the text has been munged and accumulated into
1007          * the object, let's actually output it:
1008          */
1009         public function output() {
1010                 global $wgUser, $wgOutputEncoding, $wgRequest;
1011                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
1012                 global $wgUseAjax, $wgAjaxWatch;
1013                 global $wgEnableMWSuggest, $wgUniversalEditButton;
1014                 global $wgArticle;
1015
1016                 if( $this->mDoNothing ){
1017                         return;
1018                 }
1019                 wfProfileIn( __METHOD__ );
1020                 if ( $this->mRedirect != '' ) {
1021                         # Standards require redirect URLs to be absolute
1022                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
1023                         if( $this->mRedirectCode == '301' || $this->mRedirectCode == '303' ) {
1024                                 if( !$wgDebugRedirects ) {
1025                                         $message = self::getStatusMessage( $this->mRedirectCode );
1026                                         $wgRequest->response()->header( "HTTP/1.1 {$this->mRedirectCode} $message" );
1027                                 }
1028                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
1029                         }
1030                         $this->sendCacheControl();
1031
1032                         $wgRequest->response()->header( "Content-Type: text/html; charset=utf-8" );
1033                         if( $wgDebugRedirects ) {
1034                                 $url = htmlspecialchars( $this->mRedirect );
1035                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
1036                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
1037                                 print "</body>\n</html>\n";
1038                         } else {
1039                                 $wgRequest->response()->header( 'Location: ' . $this->mRedirect );
1040                         }
1041                         wfProfileOut( __METHOD__ );
1042                         return;
1043                 } elseif ( $this->mStatusCode ) {
1044                         $message = self::getStatusMessage( $this->mStatusCode );
1045                         if ( $message )
1046                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $message );
1047                 }
1048
1049                 $sk = $wgUser->getSkin();
1050
1051                 if ( $wgUseAjax ) {
1052                         $this->addScriptFile( 'ajax.js' );
1053
1054                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
1055
1056                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
1057                                 $this->addScriptFile( 'ajaxwatch.js' );
1058                         }
1059
1060                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
1061                                 $this->addScriptFile( 'mwsuggest.js' );
1062                         }
1063                 }
1064
1065                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
1066                         $this->addScriptFile( 'rightclickedit.js' );
1067                 }
1068
1069                 if( $wgUniversalEditButton ) {
1070                         if( isset( $wgArticle ) && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
1071                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
1072                                 // Original UniversalEditButton
1073                                 $msg = wfMsg('edit');
1074                                 $this->addLink( array(
1075                                         'rel' => 'alternate',
1076                                         'type' => 'application/x-wiki',
1077                                         'title' => $msg,
1078                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1079                                 ) );
1080                                 // Alternate edit link
1081                                 $this->addLink( array(
1082                                         'rel' => 'edit',
1083                                         'title' => $msg,
1084                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1085                                 ) );
1086                         }
1087                 }
1088
1089                 # Buffer output; final headers may depend on later processing
1090                 ob_start();
1091
1092                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1093                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
1094
1095                 if ($this->mArticleBodyOnly) {
1096                         $this->out($this->mBodytext);
1097                 } else {
1098                         // Hook that allows last minute changes to the output page, e.g.
1099                         // adding of CSS or Javascript by extensions.
1100                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1101
1102                         wfProfileIn( 'Output-skin' );
1103                         $sk->outputPage( $this );
1104                         wfProfileOut( 'Output-skin' );
1105                 }
1106
1107                 $this->sendCacheControl();
1108                 ob_end_flush();
1109                 wfProfileOut( __METHOD__ );
1110         }
1111
1112         /**
1113          * Actually output something with print(). Performs an iconv to the
1114          * output encoding, if needed.
1115          * @param string $ins The string to output
1116          */
1117         public function out( $ins ) {
1118                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1119                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1120                         $outs = $ins;
1121                 } else {
1122                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1123                         if ( false === $outs ) { $outs = $ins; }
1124                 }
1125                 print $outs;
1126         }
1127
1128         /**
1129          * @todo document
1130          */
1131         public static function setEncodings() {
1132                 global $wgInputEncoding, $wgOutputEncoding;
1133                 global $wgContLang;
1134
1135                 $wgInputEncoding = strtolower( $wgInputEncoding );
1136
1137                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
1138                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
1139                         return;
1140                 }
1141                 $wgOutputEncoding = $wgInputEncoding;
1142         }
1143
1144         /**
1145          * Deprecated, use wfReportTime() instead.
1146          * @return string
1147          * @deprecated
1148          */
1149         public function reportTime() {
1150                 wfDeprecated( __METHOD__ );
1151                 $time = wfReportTime();
1152                 return $time;
1153         }
1154
1155         /**
1156          * Produce a "user is blocked" page.
1157          *
1158          * @param bool $return Whether to have a "return to $wgTitle" message or not.
1159          * @return nothing
1160          */
1161         function blockedPage( $return = true ) {
1162                 global $wgUser, $wgContLang, $wgLang;
1163
1164                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1165                 $this->setRobotPolicy( 'noindex,nofollow' );
1166                 $this->setArticleRelated( false );
1167
1168                 $name = User::whoIs( $wgUser->blockedBy() );
1169                 $reason = $wgUser->blockedFor();
1170                 if( $reason == '' ) {
1171                         $reason = wfMsg( 'blockednoreason' );
1172                 }
1173                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
1174                 $ip = wfGetIP();
1175
1176                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1177
1178                 $blockid = $wgUser->mBlock->mId;
1179
1180                 $blockExpiry = $wgUser->mBlock->mExpiry;
1181                 if ( $blockExpiry == 'infinity' ) {
1182                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
1183                         // Search for localization in 'ipboptions'
1184                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
1185                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1186                                 if ( strpos( $option, ":" ) === false )
1187                                         continue;
1188                                 list( $show, $value ) = explode( ":", $option );
1189                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1190                                         $blockExpiry = $show;
1191                                         break;
1192                                 }
1193                         }
1194                 } else {
1195                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
1196                 }
1197
1198                 if ( $wgUser->mBlock->mAuto ) {
1199                         $msg = 'autoblockedtext';
1200                 } else {
1201                         $msg = 'blockedtext';
1202                 }
1203
1204                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1205                  * This could be a username, an ip range, or a single ip. */
1206                 $intended = $wgUser->mBlock->mAddress;
1207
1208                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
1209
1210                 # Don't auto-return to special pages
1211                 if( $return ) {
1212                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1213                         $this->returnToMain( null, $return );
1214                 }
1215         }
1216
1217         /**
1218          * Output a standard error page
1219          *
1220          * @param string $title Message key for page title
1221          * @param string $msg Message key for page text
1222          * @param array $params Message parameters
1223          */
1224         public function showErrorPage( $title, $msg, $params = array() ) {
1225                 if ( $this->getTitle() ) {
1226                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1227                 }
1228                 $this->setPageTitle( wfMsg( $title ) );
1229                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1230                 $this->setRobotPolicy( 'noindex,nofollow' );
1231                 $this->setArticleRelated( false );
1232                 $this->enableClientCache( false );
1233                 $this->mRedirect = '';
1234                 $this->mBodytext = '';
1235
1236                 array_unshift( $params, 'parse' );
1237                 array_unshift( $params, $msg );
1238                 $this->addHTML( call_user_func_array( 'wfMsgExt', $params ) );
1239
1240                 $this->returnToMain();
1241         }
1242
1243         /**
1244          * Output a standard permission error page
1245          *
1246          * @param array $errors Error message keys
1247          */
1248         public function showPermissionsErrorPage( $errors, $action = null )
1249         {
1250                 $this->mDebugtext .= 'Original title: ' .
1251                 $this->getTitle()->getPrefixedText() . "\n";
1252                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1253                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1254                 $this->setRobotPolicy( 'noindex,nofollow' );
1255                 $this->setArticleRelated( false );
1256                 $this->enableClientCache( false );
1257                 $this->mRedirect = '';
1258                 $this->mBodytext = '';
1259                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1260         }
1261
1262         /** @deprecated */
1263         public function errorpage( $title, $msg ) {
1264                 wfDeprecated( __METHOD__ );
1265                 throw new ErrorPageError( $title, $msg );
1266         }
1267
1268         /**
1269          * Display an error page indicating that a given version of MediaWiki is
1270          * required to use it
1271          *
1272          * @param mixed $version The version of MediaWiki needed to use the page
1273          */
1274         public function versionRequired( $version ) {
1275                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1276                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1277                 $this->setRobotPolicy( 'noindex,nofollow' );
1278                 $this->setArticleRelated( false );
1279                 $this->mBodytext = '';
1280
1281                 $this->addWikiMsg( 'versionrequiredtext', $version );
1282                 $this->returnToMain();
1283         }
1284
1285         /**
1286          * Display an error page noting that a given permission bit is required.
1287          *
1288          * @param string $permission key required
1289          */
1290         public function permissionRequired( $permission ) {
1291                 global $wgLang;
1292
1293                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1294                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1295                 $this->setRobotPolicy( 'noindex,nofollow' );
1296                 $this->setArticleRelated( false );
1297                 $this->mBodytext = '';
1298
1299                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1300                         User::getGroupsWithPermission( $permission ) );
1301                 if( $groups ) {
1302                         $this->addWikiMsg( 'badaccess-groups',
1303                                 $wgLang->commaList( $groups ),
1304                                 count( $groups) );
1305                 } else {
1306                         $this->addWikiMsg( 'badaccess-group0' );
1307                 }
1308                 $this->returnToMain();
1309         }
1310
1311         /**
1312          * Use permissionRequired.
1313          * @deprecated
1314          */
1315         public function sysopRequired() {
1316                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1317         }
1318
1319         /**
1320          * Use permissionRequired.
1321          * @deprecated
1322          */
1323         public function developerRequired() {
1324                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1325         }
1326
1327         /**
1328          * Produce the stock "please login to use the wiki" page
1329          */
1330         public function loginToUse() {
1331                 global $wgUser, $wgContLang;
1332
1333                 if( $wgUser->isLoggedIn() ) {
1334                         $this->permissionRequired( 'read' );
1335                         return;
1336                 }
1337
1338                 $skin = $wgUser->getSkin();
1339
1340                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1341                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1342                 $this->setRobotPolicy( 'noindex,nofollow' );
1343                 $this->setArticleFlag( false );
1344
1345                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1346                 $loginLink = $skin->link(
1347                         $loginTitle,
1348                         wfMsgHtml( 'loginreqlink' ),
1349                         array(),
1350                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
1351                         array( 'known', 'noclasses' )
1352                 );
1353                 $this->addHTML( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1354                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . "-->" );
1355
1356                 # Don't return to the main page if the user can't read it
1357                 # otherwise we'll end up in a pointless loop
1358                 $mainPage = Title::newMainPage();
1359                 if( $mainPage->userCanRead() )
1360                         $this->returnToMain( null, $mainPage );
1361         }
1362
1363         /** @deprecated */
1364         public function databaseError( $fname, $sql, $error, $errno ) {
1365                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1366         }
1367
1368         /**
1369          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1370          * @return string The wikitext error-messages, formatted into a list.
1371          */
1372         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1373                 if ($action == null) {
1374                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1375                 } else {
1376                         global $wgLang;
1377                         $action_desc = wfMsgNoTrans( "action-$action" );
1378                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1379                 }
1380
1381                 if (count( $errors ) > 1) {
1382                         $text .= '<ul class="permissions-errors">' . "\n";
1383
1384                         foreach( $errors as $error )
1385                         {
1386                                 $text .= '<li>';
1387                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1388                                 $text .= "</li>\n";
1389                         }
1390                         $text .= '</ul>';
1391                 } else {
1392                         $text .= "<div class=\"permissions-errors\">\n" . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . "\n</div>";
1393                 }
1394
1395                 return $text;
1396         }
1397
1398         /**
1399          * Display a page stating that the Wiki is in read-only mode,
1400          * and optionally show the source of the page that the user
1401          * was trying to edit.  Should only be called (for this
1402          * purpose) after wfReadOnly() has returned true.
1403          *
1404          * For historical reasons, this function is _also_ used to
1405          * show the error message when a user tries to edit a page
1406          * they are not allowed to edit.  (Unless it's because they're
1407          * blocked, then we show blockedPage() instead.)  In this
1408          * case, the second parameter should be set to true and a list
1409          * of reasons supplied as the third parameter.
1410          *
1411          * @todo Needs to be split into multiple functions.
1412          *
1413          * @param string $source    Source code to show (or null).
1414          * @param bool   $protected Is this a permissions error?
1415          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1416          */
1417         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1418                 global $wgUser;
1419                 $skin = $wgUser->getSkin();
1420
1421                 $this->setRobotPolicy( 'noindex,nofollow' );
1422                 $this->setArticleRelated( false );
1423
1424                 // If no reason is given, just supply a default "I can't let you do
1425                 // that, Dave" message.  Should only occur if called by legacy code.
1426                 if ( $protected && empty($reasons) ) {
1427                         $reasons[] = array( 'badaccess-group0' );
1428                 }
1429
1430                 if ( !empty($reasons) ) {
1431                         // Permissions error
1432                         if( $source ) {
1433                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1434                                 $this->setSubtitle(
1435                                         wfMsg(
1436                                                 'viewsourcefor',
1437                                                 $skin->link(
1438                                                         $this->getTitle(),
1439                                                         null,
1440                                                         array(),
1441                                                         array(),
1442                                                         array( 'known', 'noclasses' )
1443                                                 )
1444                                         )
1445                                 );
1446                         } else {
1447                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1448                         }
1449                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1450                 } else {
1451                         // Wiki is read only
1452                         $this->setPageTitle( wfMsg( 'readonly' ) );
1453                         $reason = wfReadOnlyReason();
1454                         $this->wrapWikiMsg( '<div class="mw-readonly-error">$1</div>', array( 'readonlytext', $reason ) );
1455                 }
1456
1457                 // Show source, if supplied
1458                 if( is_string( $source ) ) {
1459                         $this->addWikiMsg( 'viewsourcetext' );
1460
1461                         $params = array(
1462                                 'id'   => 'wpTextbox1',
1463                                 'name' => 'wpTextbox1',
1464                                 'cols' => $wgUser->getOption( 'cols' ),
1465                                 'rows' => $wgUser->getOption( 'rows' ),
1466                                 'readonly' => 'readonly'
1467                         );
1468                         $this->addHTML( Html::element( 'textarea', $params, $source ) );
1469
1470                         // Show templates used by this article
1471                         $skin = $wgUser->getSkin();
1472                         $article = new Article( $this->getTitle() );
1473                         $this->addHTML( "<div class='templatesUsed'>
1474 {$skin->formatTemplates( $article->getUsedTemplates() )}
1475 </div>
1476 " );
1477                 }
1478
1479                 # If the title doesn't exist, it's fairly pointless to print a return
1480                 # link to it.  After all, you just tried editing it and couldn't, so
1481                 # what's there to do there?
1482                 if( $this->getTitle()->exists() ) {
1483                         $this->returnToMain( null, $this->getTitle() );
1484                 }
1485         }
1486
1487         /** @deprecated */
1488         public function fatalError( $message ) {
1489                 wfDeprecated( __METHOD__ );
1490                 throw new FatalError( $message );
1491         }
1492
1493         /** @deprecated */
1494         public function unexpectedValueError( $name, $val ) {
1495                 wfDeprecated( __METHOD__ );
1496                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1497         }
1498
1499         /** @deprecated */
1500         public function fileCopyError( $old, $new ) {
1501                 wfDeprecated( __METHOD__ );
1502                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1503         }
1504
1505         /** @deprecated */
1506         public function fileRenameError( $old, $new ) {
1507                 wfDeprecated( __METHOD__ );
1508                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1509         }
1510
1511         /** @deprecated */
1512         public function fileDeleteError( $name ) {
1513                 wfDeprecated( __METHOD__ );
1514                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1515         }
1516
1517         /** @deprecated */
1518         public function fileNotFoundError( $name ) {
1519                 wfDeprecated( __METHOD__ );
1520                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1521         }
1522
1523         public function showFatalError( $message ) {
1524                 $this->setPageTitle( wfMsg( "internalerror" ) );
1525                 $this->setRobotPolicy( "noindex,nofollow" );
1526                 $this->setArticleRelated( false );
1527                 $this->enableClientCache( false );
1528                 $this->mRedirect = '';
1529                 $this->mBodytext = $message;
1530         }
1531
1532         public function showUnexpectedValueError( $name, $val ) {
1533                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1534         }
1535
1536         public function showFileCopyError( $old, $new ) {
1537                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1538         }
1539
1540         public function showFileRenameError( $old, $new ) {
1541                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1542         }
1543
1544         public function showFileDeleteError( $name ) {
1545                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1546         }
1547
1548         public function showFileNotFoundError( $name ) {
1549                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1550         }
1551
1552         /**
1553          * Add a "return to" link pointing to a specified title
1554          *
1555          * @param $title Title to link
1556          * @param $query String: query string
1557          */
1558         public function addReturnTo( $title, $query = array() ) {
1559                 global $wgUser;
1560                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullUrl() ) );
1561                 $link = wfMsgHtml( 'returnto', $wgUser->getSkin()->link(
1562                         $title, null, array(), $query ) );
1563                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
1564         }
1565
1566         /**
1567          * Add a "return to" link pointing to a specified title,
1568          * or the title indicated in the request, or else the main page
1569          *
1570          * @param $unused No longer used
1571          * @param $returnto Title or String to return to
1572          * @param $returntoquery String: query string for the return to link
1573          */
1574         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
1575                 global $wgRequest;
1576
1577                 if ( $returnto == null ) {
1578                         $returnto = $wgRequest->getText( 'returnto' );
1579                 }
1580
1581                 if ( $returntoquery == null ) {
1582                         $returntoquery = $wgRequest->getText( 'returntoquery' );
1583                 }
1584
1585                 if ( $returnto === '' ) {
1586                         $returnto = Title::newMainPage();
1587                 }
1588
1589                 if ( is_object( $returnto ) ) {
1590                         $titleObj = $returnto;
1591                 } else {
1592                         $titleObj = Title::newFromText( $returnto );
1593                 }
1594                 if ( !is_object( $titleObj ) ) {
1595                         $titleObj = Title::newMainPage();
1596                 }
1597
1598                 $this->addReturnTo( $titleObj, $returntoquery );
1599         }
1600
1601         /**
1602          * @return string The doctype, opening <html>, and head element.
1603          *
1604          * @param $sk Skin The given Skin
1605          */
1606         public function headElement( Skin $sk, $includeStyle = true ) {
1607                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1608                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces, $wgHtml5Version;
1609                 global $wgContLang, $wgUseTrackbacks, $wgStyleVersion, $wgHtml5, $wgWellFormedXml;
1610
1611                 $this->addMeta( "http:Content-Type", "$wgMimeType; charset={$wgOutputEncoding}" );
1612                 if ( $sk->commonPrintStylesheet() ) {
1613                         $this->addStyle( 'common/wikiprintable.css', 'print' );
1614                 }
1615                 $sk->setupUserCss( $this );
1616
1617                 $ret = '';
1618
1619                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1620                         $ret .= "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
1621                 }
1622
1623                 if ( $this->getHTMLTitle() == '' ) {
1624                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1625                 }
1626
1627                 $dir = $wgContLang->getDir();
1628
1629                 if ( $wgHtml5 ) {
1630                         if ( $wgWellFormedXml ) {
1631                                 # Unknown elements and attributes are okay in XML, but unknown
1632                                 # named entities are well-formedness errors and will break XML
1633                                 # parsers.  Thus we need a doctype that gives us appropriate
1634                                 # entity definitions.  The HTML5 spec permits four legacy
1635                                 # doctypes as obsolete but conforming, so let's pick one of
1636                                 # those, although it makes our pages look like XHTML1 Strict.
1637                                 # Isn't compatibility great?
1638                                 $ret .= "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n";
1639                         } else {
1640                                 # Much saner.
1641                                 $ret .= "<!doctype html>\n";
1642                         }
1643                         $ret .= "<html lang=\"$wgContLanguageCode\" dir=\"$dir\" ";
1644                         if ( $wgHtml5Version ) $ret .= " version=\"$wgHtml5Version\" ";
1645                         $ret .= ">\n";
1646                 } else {
1647                         $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\" \"$wgDTD\">\n";
1648                         $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1649                         foreach($wgXhtmlNamespaces as $tag => $ns) {
1650                                 $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1651                         }
1652                         $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" dir=\"$dir\">\n";
1653                 }
1654
1655                 $ret .= "<head>\n";
1656                 $ret .= "<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1657                 $ret .= implode( "\n", array(
1658                         $this->getHeadLinks(),
1659                         $this->buildCssLinks(),
1660                         $this->getHeadScripts( $sk ),
1661                         $this->getHeadItems(),
1662                 ));
1663                 if( $sk->usercss ){
1664                         $ret .= Html::inlineStyle( $sk->usercss );
1665                 }
1666
1667                 if ($wgUseTrackbacks && $this->isArticleRelated())
1668                         $ret .= $this->getTitle()->trackbackRDF();
1669
1670                 $ret .= "</head>\n";
1671                 return $ret;
1672         }
1673
1674         /*
1675          * gets the global variables and mScripts
1676          *
1677          * also adds userjs to the end if enabled:
1678         */
1679         function getHeadScripts( Skin $sk ) {
1680                 global $wgUser, $wgRequest, $wgJsMimeType, $wgUseSiteJs;
1681                 global $wgStylePath, $wgStyleVersion;
1682
1683                 $scripts = Skin::makeGlobalVariablesScript( $sk->getSkinName() );
1684                 $scripts .= Html::linkedScript( "{$wgStylePath}/common/wikibits.js?$wgStyleVersion" );
1685
1686                 //add site JS if enabled:
1687                 if( $wgUseSiteJs ) {
1688                         $jsCache = $wgUser->isLoggedIn() ? '&smaxage=0' : '';
1689                         $this->addScriptFile(  Skin::makeUrl( '-',
1690                                         "action=raw$jsCache&gen=js&useskin=" .
1691                                         urlencode( $sk->getSkinName() )
1692                                         )
1693                                 );
1694                 }
1695
1696                 //add user js if enabled:
1697                 if( $this->isUserJsAllowed() && $wgUser->isLoggedIn() ) {
1698                         $action = $wgRequest->getVal( 'action', 'view' );
1699                         if( $this->mTitle && $this->mTitle->isJsSubpage() and $sk->userCanPreview( $action ) ) {
1700                                 # XXX: additional security check/prompt?
1701                                 $this->addInlineScript( $wgRequest->getText( 'wpTextbox1' ) );
1702                         } else {
1703                                 $userpage = $wgUser->getUserPage();
1704                                 $userjs = Skin::makeUrl(
1705                                         $userpage->getPrefixedText() . '/' . $sk->getSkinName() . '.js',
1706                                         'action=raw&ctype=' . $wgJsMimeType );
1707                                 $this->addScriptFile( $userjs );
1708                         }
1709                 }
1710
1711                 $scripts .= "\n" . $this->mScripts;
1712                 return $scripts;
1713         }
1714
1715         protected function addDefaultMeta() {
1716                 global $wgVersion, $wgHtml5;
1717
1718                 static $called = false;
1719                 if ( $called ) {
1720                         # Don't run this twice
1721                         return;
1722                 }
1723                 $called = true;
1724
1725                 if ( !$wgHtml5 ) {
1726                         $this->addMeta( 'http:Content-Style-Type', 'text/css' ); //bug 15835
1727                 }
1728                 $this->addMeta( 'generator', "MediaWiki $wgVersion" );
1729
1730                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
1731                 if( $p !== 'index,follow' ) {
1732                         // http://www.robotstxt.org/wc/meta-user.html
1733                         // Only show if it's different from the default robots policy
1734                         $this->addMeta( 'robots', $p );
1735                 }
1736
1737                 if ( count( $this->mKeywords ) > 0 ) {
1738                         $strip = array(
1739                                 "/<.*?" . ">/" => '',
1740                                 "/_/" => ' '
1741                         );
1742                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
1743                 }
1744         }
1745
1746         /**
1747          * @return string HTML tag links to be put in the header.
1748          */
1749         public function getHeadLinks() {
1750                 global $wgRequest, $wgFeed;
1751
1752                 // Ideally this should happen earlier, somewhere. :P
1753                 $this->addDefaultMeta();
1754
1755                 $tags = array();
1756
1757                 foreach ( $this->mMetatags as $tag ) {
1758                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1759                                 $a = 'http-equiv';
1760                                 $tag[0] = substr( $tag[0], 5 );
1761                         } else {
1762                                 $a = 'name';
1763                         }
1764                         $tags[] = Html::element( 'meta',
1765                                 array(
1766                                         $a => $tag[0],
1767                                         'content' => $tag[1] ) );
1768                 }
1769                 foreach ( $this->mLinktags as $tag ) {
1770                         $tags[] = Html::element( 'link', $tag );
1771                 }
1772
1773                 if( $wgFeed ) {
1774                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1775                                 # Use the page name for the title (accessed through $wgTitle since
1776                                 # there's no other way).  In principle, this could lead to issues
1777                                 # with having the same name for different feeds corresponding to
1778                                 # the same page, but we can't avoid that at this low a level.
1779
1780                                 $tags[] = $this->feedLink(
1781                                         $format,
1782                                         $link,
1783                                         # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1784                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() ) );
1785                         }
1786
1787                         # Recent changes feed should appear on every page (except recentchanges,
1788                         # that would be redundant). Put it after the per-page feed to avoid
1789                         # changing existing behavior. It's still available, probably via a
1790                         # menu in your browser. Some sites might have a different feed they'd
1791                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
1792                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
1793                         # If so, use it instead.
1794
1795                         global $wgOverrideSiteFeed, $wgSitename, $wgFeedClasses, $wgAdvertisedFeedTypes;
1796                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1797
1798                         if ( $wgOverrideSiteFeed ) {
1799                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
1800                                         $tags[] = $this->feedLink (
1801                                                 $type,
1802                                                 htmlspecialchars( $feedUrl ),
1803                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
1804                                 }
1805                         } elseif ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
1806                                 foreach ( $wgAdvertisedFeedTypes as $format ) {
1807                                         $tags[] = $this->feedLink(
1808                                                 $format,
1809                                                 $rctitle->getLocalURL( "feed={$format}" ),
1810                                                 wfMsg( "site-{$format}-feed", $wgSitename ) ); # For grep: 'site-rss-feed', 'site-atom-feed'.
1811                                 }
1812                         }
1813                 }
1814
1815                 return implode( "\n", $tags );
1816         }
1817
1818         /**
1819          * Return URLs for each supported syndication format for this page.
1820          * @return array associating format keys with URLs
1821          */
1822         public function getSyndicationLinks() {
1823                 return $this->mFeedLinks;
1824         }
1825
1826         /**
1827          * Generate a <link rel/> for an RSS feed.
1828          */
1829         private function feedLink( $type, $url, $text ) {
1830                 return Html::element( 'link', array(
1831                         'rel' => 'alternate',
1832                         'type' => "application/$type+xml",
1833                         'title' => $text,
1834                         'href' => $url ) );
1835         }
1836
1837         /**
1838          * Add a local or specified stylesheet, with the given media options.
1839          * Meant primarily for internal use...
1840          *
1841          * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
1842          * @param $conditional -- for IE conditional comments, specifying an IE version
1843          * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
1844          */
1845         public function addStyle( $style, $media='', $condition='', $dir='' ) {
1846                 $options = array();
1847                 // Even though we expect the media type to be lowercase, but here we
1848                 // force it to lowercase to be safe.
1849                 if( $media )
1850                         $options['media'] = $media;
1851                 if( $condition )
1852                         $options['condition'] = $condition;
1853                 if( $dir )
1854                         $options['dir'] = $dir;
1855                 $this->styles[$style] = $options;
1856         }
1857
1858         /**
1859          * Adds inline CSS styles
1860          * @param $style_css Mixed: inline CSS
1861          */
1862         public function addInlineStyle( $style_css ){
1863                 $this->mScripts .= Html::inlineStyle( $style_css );
1864         }
1865
1866         /**
1867          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
1868          * These will be applied to various media & IE conditionals.
1869          */
1870         public function buildCssLinks() {
1871                 $links = array();
1872                 foreach( $this->styles as $file => $options ) {
1873                         $link = $this->styleLink( $file, $options );
1874                         if( $link )
1875                                 $links[] = $link;
1876                 }
1877
1878                 return implode( "\n", $links );
1879         }
1880
1881         protected function styleLink( $style, $options ) {
1882                 global $wgRequest;
1883
1884                 if( isset( $options['dir'] ) ) {
1885                         global $wgContLang;
1886                         $siteDir = $wgContLang->getDir();
1887                         if( $siteDir != $options['dir'] )
1888                                 return '';
1889                 }
1890
1891                 if( isset( $options['media'] ) ) {
1892                         $media = $this->transformCssMedia( $options['media'] );
1893                         if( is_null( $media ) ) {
1894                                 return '';
1895                         }
1896                 } else {
1897                         $media = 'all';
1898                 }
1899
1900                 if( substr( $style, 0, 1 ) == '/' ||
1901                         substr( $style, 0, 5 ) == 'http:' ||
1902                         substr( $style, 0, 6 ) == 'https:' ) {
1903                         $url = $style;
1904                 } else {
1905                         global $wgStylePath, $wgStyleVersion;
1906                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
1907                 }
1908
1909                 $link = Html::linkedStyle( $url, $media );
1910
1911                 if( isset( $options['condition'] ) ) {
1912                         $condition = htmlspecialchars( $options['condition'] );
1913                         $link = "<!--[if $condition]>$link<![endif]-->";
1914                 }
1915                 return $link;
1916         }
1917
1918         function transformCssMedia( $media ) {
1919                 global $wgRequest, $wgHandheldForIPhone;
1920
1921                 // Switch in on-screen display for media testing
1922                 $switches = array(
1923                         'printable' => 'print',
1924                         'handheld' => 'handheld',
1925                 );
1926                 foreach( $switches as $switch => $targetMedia ) {
1927                         if( $wgRequest->getBool( $switch ) ) {
1928                                 if( $media == $targetMedia ) {
1929                                         $media = '';
1930                                 } elseif( $media == 'screen' ) {
1931                                         return null;
1932                                 }
1933                         }
1934                 }
1935
1936                 // Expand longer media queries as iPhone doesn't grok 'handheld'
1937                 if( $wgHandheldForIPhone ) {
1938                         $mediaAliases = array(
1939                                 'screen' => 'screen and (min-device-width: 481px)',
1940                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
1941                         );
1942
1943                         if( isset( $mediaAliases[$media] ) ) {
1944                                 $media = $mediaAliases[$media];
1945                         }
1946                 }
1947
1948                 return $media;
1949         }
1950
1951         /**
1952          * Turn off regular page output and return an error reponse
1953          * for when rate limiting has triggered.
1954          */
1955         public function rateLimited() {
1956
1957                 $this->setPageTitle(wfMsg('actionthrottled'));
1958                 $this->setRobotPolicy( 'noindex,follow' );
1959                 $this->setArticleRelated( false );
1960                 $this->enableClientCache( false );
1961                 $this->mRedirect = '';
1962                 $this->clearHTML();
1963                 $this->setStatusCode(503);
1964                 $this->addWikiMsg( 'actionthrottledtext' );
1965
1966                 $this->returnToMain( null, $this->getTitle() );
1967         }
1968
1969         /**
1970          * Show an "add new section" link?
1971          *
1972          * @return bool
1973          */
1974         public function showNewSectionLink() {
1975                 return $this->mNewSectionLink;
1976         }
1977
1978         /**
1979         * Forcibly hide the new section link?
1980         *
1981         * @return bool
1982         */
1983         public function forceHideNewSectionLink() {
1984                 return $this->mHideNewSectionLink;
1985         }
1986
1987         /**
1988          * Show a warning about slave lag
1989          *
1990          * If the lag is higher than $wgSlaveLagCritical seconds,
1991          * then the warning is a bit more obvious. If the lag is
1992          * lower than $wgSlaveLagWarning, then no warning is shown.
1993          *
1994          * @param int $lag Slave lag
1995          */
1996         public function showLagWarning( $lag ) {
1997                 global $wgSlaveLagWarning, $wgSlaveLagCritical, $wgLang;
1998                 if( $lag >= $wgSlaveLagWarning ) {
1999                         $message = $lag < $wgSlaveLagCritical
2000                                 ? 'lag-warn-normal'
2001                                 : 'lag-warn-high';
2002                         $wrap = Html::rawElement( 'div', array( 'class' => "mw-{$message}" ), "\n$1\n" );
2003                         $this->wrapWikiMsg( "$wrap\n", array( $message, $wgLang->formatNum( $lag ) ) );
2004                 }
2005         }
2006
2007         /**
2008          * Add a wikitext-formatted message to the output.
2009          * This is equivalent to:
2010          *
2011          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
2012          */
2013         public function addWikiMsg( /*...*/ ) {
2014                 $args = func_get_args();
2015                 $name = array_shift( $args );
2016                 $this->addWikiMsgArray( $name, $args );
2017         }
2018
2019         /**
2020          * Add a wikitext-formatted message to the output.
2021          * Like addWikiMsg() except the parameters are taken as an array
2022          * instead of a variable argument list.
2023          *
2024          * $options is passed through to wfMsgExt(), see that function for details.
2025          */
2026         public function addWikiMsgArray( $name, $args, $options = array() ) {
2027                 $options[] = 'parse';
2028                 $text = wfMsgExt( $name, $options, $args );
2029                 $this->addHTML( $text );
2030         }
2031
2032         /**
2033          * This function takes a number of message/argument specifications, wraps them in
2034          * some overall structure, and then parses the result and adds it to the output.
2035          *
2036          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
2037          * on. The subsequent arguments may either be strings, in which case they are the
2038          * message names, or arrays, in which case the first element is the message name,
2039          * and subsequent elements are the parameters to that message.
2040          *
2041          * The special named parameter 'options' in a message specification array is passed
2042          * through to the $options parameter of wfMsgExt().
2043          *
2044          * Don't use this for messages that are not in users interface language.
2045          *
2046          * For example:
2047          *
2048          *    $wgOut->wrapWikiMsg( '<div class="error">$1</div>', 'some-error' );
2049          *
2050          * Is equivalent to:
2051          *
2052          *    $wgOut->addWikiText( '<div class="error">' . wfMsgNoTrans( 'some-error' ) . '</div>' );
2053          */
2054         public function wrapWikiMsg( $wrap /*, ...*/ ) {
2055                 $msgSpecs = func_get_args();
2056                 array_shift( $msgSpecs );
2057                 $msgSpecs = array_values( $msgSpecs );
2058                 $s = $wrap;
2059                 foreach ( $msgSpecs as $n => $spec ) {
2060                         $options = array();
2061                         if ( is_array( $spec ) ) {
2062                                 $args = $spec;
2063                                 $name = array_shift( $args );
2064                                 if ( isset( $args['options'] ) ) {
2065                                         $options = $args['options'];
2066                                         unset( $args['options'] );
2067                                 }
2068                         }  else {
2069                                 $args = array();
2070                                 $name = $spec;
2071                         }
2072                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
2073                 }
2074                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
2075         }
2076 }