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