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