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 $mDoNothing = false;
  25         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
  26         var $mIsArticleRelated = true;
  27         protected $mParserOptions = null; // lazy initialised, use parserOptions()
  28
  29         var $mFeedLinks = array();
  30
  31         var $mEnableClientCache = true;
  32         var $mArticleBodyOnly = false;
  33
  34         var $mNewSectionLink = false;
  35         var $mHideNewSectionLink = false;
  36         var $mNoGallery = false;
  37         var $mPageTitleActionText = '';
  38         var $mParseWarnings = array();
  39         var $mSquidMaxage = 0;
  40         var $mRevisionId = null;
  41         protected $mTitle = null;
  42
  43         /**
  44          * An array of stylesheet filenames (relative from skins path), with options
  45          * for CSS media, IE conditions, and RTL/LTR direction.
  46          * For internal use; add settings in the skin via $this->addStyle()
  47          */
  48         var $styles = array();
  49
  50         private $mIndexPolicy = 'index';
  51         private $mFollowPolicy = 'follow';
  52         private $mVaryHeader = array( 'Accept-Encoding' => array('list-contains=gzip'),
  53                                                                   'Cookie' => null );
  54
  55         /**
  56          * Constructor
  57          * Initialise private variables
  58          */
  59         function __construct() {
  60                 global $wgAllowUserJs;
  61                 $this->mAllowUserJs = $wgAllowUserJs;
  62         }
  63
  64         public function redirect( $url, $responsecode = '302' ) {
  65                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  66                 $this->mRedirect = str_replace( "\n", '', $url );
  67                 $this->mRedirectCode = $responsecode;
  68         }
  69
  70         public function getRedirect() {
  71                 return $this->mRedirect;
  72         }
  73
  74         /**
  75          * Set the HTTP status code to send with the output.
  76          *
  77          * @param int $statusCode
  78          * @return nothing
  79          */
  80         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  81
  82         /**
  83          * Add a new <meta> tag
  84          * To add an http-equiv meta tag, precede the name with "http:"
  85          *
  86          * @param $name tag name
  87          * @param $val tag value
  88          */
  89         function addMeta( $name, $val ) {
  90                 array_push( $this->mMetatags, array( $name, $val ) );
  91         }
  92
  93         function addKeyword( $text ) {
  94                 if( is_array( $text )) {
  95                         $this->mKeywords = array_merge( $this->mKeywords, $text );
  96                 } else {
  97                         array_push( $this->mKeywords, $text );
  98                 }
  99         }
 100         function addScript( $script ) {
 101                 $this->mScripts .= $script . "\n";
 102         }
 103
 104         /**
 105          * Register and add a stylesheet from an extension directory.
 106          * @param $url String path to sheet.  Provide either a full url (beginning
 107          *             with 'http', etc) or a relative path from the document root
 108          *             (beginning with '/').  Otherwise it behaves identically to
 109          *             addStyle() and draws from the /skins folder.
 110          */
 111         public function addExtensionStyle( $url ) {
 112                 array_push( $this->mExtStyles, $url );
 113         }
 114
 115         /**
 116          * Add a JavaScript file out of skins/common, or a given relative path.
 117          * @param string $file filename in skins/common or complete on-server path (/foo/bar.js)
 118          */
 119         function addScriptFile( $file ) {
 120                 global $wgStylePath, $wgStyleVersion, $wgJsMimeType;
 121                 if( substr( $file, 0, 1 ) == '/' ) {
 122                         $path = $file;
 123                 } else {
 124                         $path =  "{$wgStylePath}/common/{$file}";
 125                 }
 126                 $this->addScript(
 127                         Xml::element( 'script',
 128                                 array(
 129                                         'type' => $wgJsMimeType,
 130                                         'src' => "$path?$wgStyleVersion",
 131                                 ),
 132                                 '', false
 133                         )
 134                 );
 135         }
 136
 137         /**
 138          * Add a self-contained script tag with the given contents
 139          * @param string $script JavaScript text, no <script> tags
 140          */
 141         function addInlineScript( $script ) {
 142                 $this->mScripts .= Html::inlineScript( "\n$script\n" ) . "\n";
 143         }
 144
 145         /**
 146          * Get all registered JS and CSS tags for the header.
 147          */
 148         function getScript() {
 149                 return $this->mScripts . $this->getHeadItems();
 150         }
 151
 152         function getHeadItems() {
 153                 $s = '';
 154                 foreach ( $this->mHeadItems as $item ) {
 155                         $s .= $item;
 156                 }
 157                 return $s;
 158         }
 159
 160         function addHeadItem( $name, $value ) {
 161                 $this->mHeadItems[$name] = $value;
 162         }
 163
 164         function hasHeadItem( $name ) {
 165                 return isset( $this->mHeadItems[$name] );
 166         }
 167
 168         function setETag($tag) { $this->mETag = $tag; }
 169         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 170         function getArticleBodyOnly() { return $this->mArticleBodyOnly; }
 171
 172         function addLink( $linkarr ) {
 173                 # $linkarr should be an associative array of attributes. We'll escape on output.
 174                 array_push( $this->mLinktags, $linkarr );
 175         }
 176
 177         # Get all links added by extensions
 178         function getExtStyle() {
 179                 return $this->mExtStyles;
 180         }
 181
 182         function addMetadataLink( $linkarr ) {
 183                 # note: buggy CC software only reads first "meta" link
 184                 static $haveMeta = false;
 185                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 186                 $this->addLink( $linkarr );
 187                 $haveMeta = true;
 188         }
 189
 190         /**
 191          * checkLastModified tells the client to use the client-cached page if
 192          * possible. If sucessful, the OutputPage is disabled so that
 193          * any future call to OutputPage->output() have no effect.
 194          *
 195          * Side effect: sets mLastModified for Last-Modified header
 196          *
 197          * @return bool True iff cache-ok headers was sent.
 198          */
 199         function checkLastModified( $timestamp ) {
 200                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 201
 202                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 203                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 204                         return false;
 205                 }
 206                 if( !$wgCachePages ) {
 207                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 208                         return false;
 209                 }
 210                 if( $wgUser->getOption( 'nocache' ) ) {
 211                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 212                         return false;
 213                 }
 214
 215                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 216                 $modifiedTimes = array(
 217                         'page' => $timestamp,
 218                         'user' => $wgUser->getTouched(),
 219                         'epoch' => $wgCacheEpoch
 220                 );
 221                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 222
 223                 $maxModified = max( $modifiedTimes );
 224                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 225
 226                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 227                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 228                         return false;
 229                 }
 230
 231                 # Make debug info
 232                 $info = '';
 233                 foreach ( $modifiedTimes as $name => $value ) {
 234                         if ( $info !== '' ) {
 235                                 $info .= ', ';
 236                         }
 237                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 238                 }
 239
 240                 # IE sends sizes after the date like this:
 241                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 242                 # this breaks strtotime().
 243                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 244
 245                 wfSuppressWarnings(); // E_STRICT system time bitching
 246                 $clientHeaderTime = strtotime( $clientHeader );
 247                 wfRestoreWarnings();
 248                 if ( !$clientHeaderTime ) {
 249                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 250                         return false;
 251                 }
 252                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 253
 254                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 255                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 256                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 257                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 258                 if( $clientHeaderTime < $maxModified ) {
 259                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 260                         return false;
 261                 }
 262
 263                 # Not modified
 264                 # Give a 304 response code and disable body output
 265                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 266                 ini_set('zlib.output_compression', 0);
 267                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 268                 $this->sendCacheControl();
 269                 $this->disable();
 270
 271                 // Don't output a compressed blob when using ob_gzhandler;
 272                 // it's technically against HTTP spec and seems to confuse
 273                 // Firefox when the response gets split over two packets.
 274                 wfClearOutputBuffers();
 275
 276                 return true;
 277         }
 278
 279         function setPageTitleActionText( $text ) {
 280                 $this->mPageTitleActionText = $text;
 281         }
 282
 283         function getPageTitleActionText () {
 284                 if ( isset( $this->mPageTitleActionText ) ) {
 285                         return $this->mPageTitleActionText;
 286                 }
 287         }
 288
 289         /**
 290          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 291          *
 292          * @param $policy string The literal string to output as the contents of
 293          *   the meta tag.  Will be parsed according to the spec and output in
 294          *   standardized form.
 295          * @return null
 296          */
 297         public function setRobotPolicy( $policy ) {
 298                 $policy = Article::formatRobotPolicy( $policy );
 299
 300                 if( isset( $policy['index'] ) ){
 301                         $this->setIndexPolicy( $policy['index'] );
 302                 }
 303                 if( isset( $policy['follow'] ) ){
 304                         $this->setFollowPolicy( $policy['follow'] );
 305                 }
 306         }
 307
 308         /**
 309          * Set the index policy for the page, but leave the follow policy un-
 310          * touched.
 311          *
 312          * @param $policy string Either 'index' or 'noindex'.
 313          * @return null
 314          */
 315         public function setIndexPolicy( $policy ) {
 316                 $policy = trim( $policy );
 317                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 318                         $this->mIndexPolicy = $policy;
 319                 }
 320         }
 321
 322         /**
 323          * Set the follow policy for the page, but leave the index policy un-
 324          * touched.
 325          *
 326          * @param $policy string Either 'follow' or 'nofollow'.
 327          * @return null
 328          */
 329         public function setFollowPolicy( $policy ) {
 330                 $policy = trim( $policy );
 331                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 332                         $this->mFollowPolicy = $policy;
 333                 }
 334         }
 335
 336         /**
 337          * "HTML title" means the contents of <title>. It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 338          */
 339         public function setHTMLTitle( $name ) {
 340                 $this->mHTMLtitle = $name;
 341         }
 342
 343         /**
 344          * "Page title" means the contents of <h1>. It is stored as a valid HTML fragment.
 345          * This function allows good tags like <sup> in the <h1> tag, but not bad tags like <script>.
 346          * This function automatically sets <title> to the same content as <h1> but with all tags removed.
 347          * Bad tags that were escaped in <h1> will still be escaped in <title>, and good tags like <i> will be dropped entirely.
 348          */
 349         public function setPageTitle( $name ) {
 350                 global $wgContLang;
 351
 352                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 353                 # but leave "<i>foobar</i>" alone
 354                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 355                 $this->mPagetitle = $nameWithTags;
 356
 357                 $taction =  $this->getPageTitleActionText();
 358                 if( !empty( $taction ) ) {
 359                         $name .= ' - '.$taction;
 360                 }
 361
 362                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 363                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 364         }
 365
 366         public function setTitle( $t ) {
 367                 $this->mTitle = $t;
 368         }
 369
 370         public function getTitle() {
 371                 if ( $this->mTitle instanceof Title ) {
 372                         return $this->mTitle;
 373                 }
 374                 else {
 375                         wfDebug( __METHOD__ . ' called and $mTitle is null. Return $wgTitle for sanity' );
 376                         global $wgTitle;
 377                         return $wgTitle;
 378                 }
 379         }
 380
 381         public function getHTMLTitle() { return $this->mHTMLtitle; }
 382         public function getPageTitle() { return $this->mPagetitle; }
 383         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 384         public function appendSubtitle( $str ) { $this->mSubtitle .= /*$this->parse(*/$str/*)*/; } // @bug 2514
 385         public function getSubtitle() { return $this->mSubtitle; }
 386         public function isArticle() { return $this->mIsarticle; }
 387         public function setPrintable() { $this->mPrintable = true; }
 388         public function isPrintable() { return $this->mPrintable; }
 389         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 390         public function disable() { $this->mDoNothing = true; }
 391         public function isDisabled() { return $this->mDoNothing; }
 392
 393         public function setSyndicated( $show = true ) {
 394                 if ( $show ) {
 395                         $this->setFeedAppendQuery( false );
 396                 } else {
 397                         $this->mFeedLinks = array();
 398                 }
 399         }
 400
 401         public function setFeedAppendQuery( $val ) {
 402                 global $wgFeedClasses, $wgAdvertisedFeedTypes;
 403
 404                 $this->mFeedLinks = array();
 405
 406                 foreach ( $wgAdvertisedFeedTypes as $type ) {
 407                         $query = "feed=$type";
 408                         if ( is_string( $val ) ) {
 409                                 $query .= '&' . $val;
 410                         }
 411                         $this->mFeedLinks[$type] = $this->getTitle()->getLocalURL( $query );
 412                 }
 413         }
 414
 415         public function addFeedLink( $format, $href ) {
 416                 $this->mFeedLinks[$format] = $href;
 417         }
 418
 419         public function isSyndicated() { return count($this->mFeedLinks); }
 420
 421         public function setArticleRelated( $v ) {
 422                 $this->mIsArticleRelated = $v;
 423                 if ( !$v ) {
 424                         $this->mIsarticle = false;
 425                 }
 426         }
 427         public function setArticleFlag( $v ) {
 428                 $this->mIsarticle = $v;
 429                 if ( $v ) {
 430                         $this->mIsArticleRelated = $v;
 431                 }
 432         }
 433
 434         public function isArticleRelated() { return $this->mIsArticleRelated; }
 435
 436         public function getLanguageLinks() { return $this->mLanguageLinks; }
 437         public function addLanguageLinks($newLinkArray) {
 438                 $this->mLanguageLinks += $newLinkArray;
 439         }
 440         public function setLanguageLinks($newLinkArray) {
 441                 $this->mLanguageLinks = $newLinkArray;
 442         }
 443
 444         public function getCategoryLinks() {
 445                 return $this->mCategoryLinks;
 446         }
 447
 448         public function getCategories() {
 449                 return $this->mCategories;
 450         }
 451
 452         /**
 453          * Add an array of categories, with names in the keys
 454          */
 455         public function addCategoryLinks( $categories ) {
 456                 global $wgUser, $wgContLang;
 457
 458                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 459                         return;
 460                 }
 461
 462                 # Add the links to a LinkBatch
 463                 $arr = array( NS_CATEGORY => $categories );
 464                 $lb = new LinkBatch;
 465                 $lb->setArray( $arr );
 466
 467                 # Fetch existence plus the hiddencat property
 468                 $dbr = wfGetDB( DB_SLAVE );
 469                 $pageTable = $dbr->tableName( 'page' );
 470                 $where = $lb->constructSet( 'page', $dbr );
 471                 $propsTable = $dbr->tableName( 'page_props' );
 472                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 473                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 474                 $res = $dbr->query( $sql, __METHOD__ );
 475
 476                 # Add the results to the link cache
 477                 $lb->addResultToCache( LinkCache::singleton(), $res );
 478
 479                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 480                 $categories = array_combine( array_keys( $categories ),
 481                         array_fill( 0, count( $categories ), 'normal' ) );
 482
 483                 # Mark hidden categories
 484                 foreach ( $res as $row ) {
 485                         if ( isset( $row->pp_value ) ) {
 486                                 $categories[$row->page_title] = 'hidden';
 487                         }
 488                 }
 489
 490                 # Add the remaining categories to the skin
 491                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 492                         $sk = $wgUser->getSkin();
 493                         foreach ( $categories as $category => $type ) {
 494                                 $origcategory = $category;
 495                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 496                                 $wgContLang->findVariantLink( $category, $title, true );
 497                                 if ( $category != $origcategory )
 498                                         if ( array_key_exists( $category, $categories ) )
 499                                                 continue;
 500                                 $text = $wgContLang->convertHtml( $title->getText() );
 501                                 $this->mCategories[] = $title->getText();
 502                                 $this->mCategoryLinks[$type][] = $sk->link( $title, $text );
 503                         }
 504                 }
 505         }
 506
 507         public function setCategoryLinks($categories) {
 508                 $this->mCategoryLinks = array();
 509                 $this->addCategoryLinks($categories);
 510         }
 511
 512         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 513         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 514
 515         public function disallowUserJs() { $this->mAllowUserJs = false; }
 516         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 517
 518         public function prependHTML( $text ) { $this->mBodytext = $text . $this->mBodytext; }
 519         public function addHTML( $text ) { $this->mBodytext .= $text; }
 520         public function clearHTML() { $this->mBodytext = ''; }
 521         public function getHTML() { return $this->mBodytext; }
 522         public function debug( $text ) { $this->mDebugtext .= $text; }
 523
 524         /* @deprecated */
 525         public function setParserOptions( $options ) {
 526                 wfDeprecated( __METHOD__ );
 527                 return $this->parserOptions( $options );
 528         }
 529
 530         public function parserOptions( $options = null ) {
 531                 if ( !$this->mParserOptions ) {
 532                         $this->mParserOptions = new ParserOptions;
 533                 }
 534                 return wfSetVar( $this->mParserOptions, $options );
 535         }
 536
 537         /**
 538          * Set the revision ID which will be seen by the wiki text parser
 539          * for things such as embedded {{REVISIONID}} variable use.
 540          * @param mixed $revid an integer, or NULL
 541          * @return mixed previous value
 542          */
 543         public function setRevisionId( $revid ) {
 544                 $val = is_null( $revid ) ? null : intval( $revid );
 545                 return wfSetVar( $this->mRevisionId, $val );
 546         }
 547
 548         public function getRevisionId() {
 549                 return $this->mRevisionId;
 550         }
 551
 552         /**
 553          * Convert wikitext to HTML and add it to the buffer
 554          * Default assumes that the current page title will
 555          * be used.
 556          *
 557          * @param string $text
 558          * @param bool   $linestart
 559          */
 560         public function addWikiText( $text, $linestart = true ) {
 561                 $title = $this->getTitle(); // Work arround E_STRICT
 562                 $this->addWikiTextTitle( $text, $title, $linestart );
 563         }
 564
 565         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 566                 $this->addWikiTextTitle($text, $title, $linestart);
 567         }
 568
 569         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 570                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 571         }
 572
 573         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 574                 global $wgParser;
 575
 576                 wfProfileIn( __METHOD__ );
 577
 578                 wfIncrStats( 'pcache_not_possible' );
 579
 580                 $popts = $this->parserOptions();
 581                 $oldTidy = $popts->setTidy( $tidy );
 582
 583                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 584                         $linestart, true, $this->mRevisionId );
 585
 586                 $popts->setTidy( $oldTidy );
 587
 588                 $this->addParserOutput( $parserOutput );
 589
 590                 wfProfileOut( __METHOD__ );
 591         }
 592
 593         /**
 594          * @todo document
 595          * @param ParserOutput object &$parserOutput
 596          */
 597         public function addParserOutputNoText( &$parserOutput ) {
 598                 global $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 599
 600                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 601                 $this->addCategoryLinks( $parserOutput->getCategories() );
 602                 $this->mNewSectionLink = $parserOutput->getNewSection();
 603                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
 604
 605                 $this->mParseWarnings = $parserOutput->getWarnings();
 606                 if ( $parserOutput->getCacheTime() == -1 ) {
 607                         $this->enableClientCache( false );
 608                 }
 609                 $this->mNoGallery = $parserOutput->getNoGallery();
 610                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 611                 // Versioning...
 612                 foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
 613                         if ( isset( $this->mTemplateIds[$ns] ) ) {
 614                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
 615                         } else {
 616                                 $this->mTemplateIds[$ns] = $dbks;
 617                         }
 618                 }
 619                 // Page title
 620                 $dt = $parserOutput->getDisplayTitle();
 621                 $title = $parserOutput->getTitleText();
 622                 if ( $dt !== false ) {
 623                         $this->setPageTitle( $dt );
 624                 }
 625                 else if ( $title != '' ) {
 626                         $this->setPageTitle( $title );
 627                 }
 628
 629                 // Hooks registered in the object
 630                 global $wgParserOutputHooks;
 631                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 632                         list( $hookName, $data ) = $hookInfo;
 633                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 634                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 635                         }
 636                 }
 637
 638                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 639         }
 640
 641         /**
 642          * @todo document
 643          * @param ParserOutput &$parserOutput
 644          */
 645         function addParserOutput( &$parserOutput ) {
 646                 $this->addParserOutputNoText( $parserOutput );
 647                 $text = $parserOutput->getText();
 648                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 649                 $this->addHTML( $text );
 650         }
 651
 652         /**
 653          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 654          * Saves the text into the parser cache if possible.
 655          *
 656          * @param string  $text
 657          * @param Article $article
 658          * @param bool    $cache
 659          * @deprecated Use Article::outputWikitext
 660          */
 661         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 662                 global $wgParser;
 663
 664                 wfDeprecated( __METHOD__ );
 665
 666                 $popts = $this->parserOptions();
 667                 $popts->setTidy(true);
 668                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 669                         $popts, true, true, $this->mRevisionId );
 670                 $popts->setTidy(false);
 671                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 672                         $parserCache = ParserCache::singleton();
 673                         $parserCache->save( $parserOutput, $article, $popts);
 674                 }
 675
 676                 $this->addParserOutput( $parserOutput );
 677         }
 678
 679         /**
 680          * @deprecated use addWikiTextTidy()
 681          */
 682         public function addSecondaryWikiText( $text, $linestart = true ) {
 683                 wfDeprecated( __METHOD__ );
 684                 $this->addWikiTextTitleTidy($text, $this->getTitle(), $linestart);
 685         }
 686
 687         /**
 688          * Add wikitext with tidy enabled
 689          */
 690         public function addWikiTextTidy(  $text, $linestart = true ) {
 691                 $title = $this->getTitle();
 692                 $this->addWikiTextTitleTidy($text, $title, $linestart);
 693         }
 694
 695
 696         /**
 697          * Add the output of a QuickTemplate to the output buffer
 698          *
 699          * @param QuickTemplate $template
 700          */
 701         public function addTemplate( &$template ) {
 702                 ob_start();
 703                 $template->execute();
 704                 $this->addHTML( ob_get_contents() );
 705                 ob_end_clean();
 706         }
 707
 708         /**
 709          * Parse wikitext and return the HTML.
 710          *
 711          * @param string $text
 712          * @param bool   $linestart Is this the start of a line?
 713          * @param bool   $interface ??
 714          */
 715         public function parse( $text, $linestart = true, $interface = false ) {
 716                 global $wgParser;
 717                 if( is_null( $this->getTitle() ) ) {
 718                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
 719                 }
 720                 $popts = $this->parserOptions();
 721                 if ( $interface) { $popts->setInterfaceMessage(true); }
 722                 $parserOutput = $wgParser->parse( $text, $this->getTitle(), $popts,
 723                         $linestart, true, $this->mRevisionId );
 724                 if ( $interface) { $popts->setInterfaceMessage(false); }
 725                 return $parserOutput->getText();
 726         }
 727
 728         /** Parse wikitext, strip paragraphs, and return the HTML. */
 729         public function parseInline( $text, $linestart = true, $interface = false ) {
 730                 $parsed = $this->parse( $text, $linestart, $interface );
 731
 732                 $m = array();
 733                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
 734                         $parsed = $m[1];
 735                 }
 736
 737                 return $parsed;
 738         }
 739
 740         /**
 741          * @param Article $article
 742          * @param User    $user
 743          *
 744          * @deprecated
 745          *
 746          * @return bool True if successful, else false.
 747          */
 748         public function tryParserCache( &$article ) {
 749                 wfDeprecated( __METHOD__ );
 750                 $parserOutput = ParserCache::singleton()->get( $article, $article->getParserOptions() );
 751
 752                 if ($parserOutput !== false) {
 753                         $this->addParserOutput( $parserOutput );
 754                         return true;
 755                 } else {
 756                         return false;
 757                 }
 758         }
 759
 760         /**
 761          * @param int $maxage Maximum cache time on the Squid, in seconds.
 762          */
 763         public function setSquidMaxage( $maxage ) {
 764                 $this->mSquidMaxage = $maxage;
 765         }
 766
 767         /**
 768          * Use enableClientCache(false) to force it to send nocache headers
 769          * @param $state ??
 770          */
 771         public function enableClientCache( $state ) {
 772                 return wfSetVar( $this->mEnableClientCache, $state );
 773         }
 774
 775         function getCacheVaryCookies() {
 776                 global $wgCookiePrefix, $wgCacheVaryCookies;
 777                 static $cookies;
 778                 if ( $cookies === null ) {
 779                         $cookies = array_merge(
 780                                 array(
 781                                         "{$wgCookiePrefix}Token",
 782                                         "{$wgCookiePrefix}LoggedOut",
 783                                         session_name()
 784                                 ),
 785                                 $wgCacheVaryCookies
 786                         );
 787                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 788                 }
 789                 return $cookies;
 790         }
 791
 792         function uncacheableBecauseRequestVars() {
 793                 global $wgRequest;
 794                 return  $wgRequest->getText('useskin', false) === false
 795                         && $wgRequest->getText('uselang', false) === false;
 796         }
 797
 798         /**
 799          * Check if the request has a cache-varying cookie header
 800          * If it does, it's very important that we don't allow public caching
 801          */
 802         function haveCacheVaryCookies() {
 803                 global $wgRequest;
 804                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 805                 if ( $cookieHeader === false ) {
 806                         return false;
 807                 }
 808                 $cvCookies = $this->getCacheVaryCookies();
 809                 foreach ( $cvCookies as $cookieName ) {
 810                         # Check for a simple string match, like the way squid does it
 811                         if ( strpos( $cookieHeader, $cookieName ) ) {
 812                                 wfDebug( __METHOD__.": found $cookieName\n" );
 813                                 return true;
 814                         }
 815                 }
 816                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 817                 return false;
 818         }
 819
 820         public function addVaryHeader( $header, $option = null ) {
 821                 if ( !array_key_exists( $header, $this->mVaryHeader ) ) {
 822                         $this->mVaryHeader[$header] = $option;
 823                 }
 824                 elseif( is_array( $option ) ) {
 825                         if( is_array( $this->mVaryHeader[$header] ) ) {
 826                                 $this->mVaryHeader[$header] = array_merge( $this->mVaryHeader[$header], $option );
 827                         }
 828                         else {
 829                                 $this->mVaryHeader[$header] = $option;
 830                         }
 831                 }
 832                 $this->mVaryHeader[$header] = array_unique( $this->mVaryHeader[$header] );
 833         }
 834
 835         /** Get a complete X-Vary-Options header */
 836         public function getXVO() {
 837                 $cvCookies = $this->getCacheVaryCookies();
 838
 839                 $cookiesOption = array();
 840                 foreach ( $cvCookies as $cookieName ) {
 841                         $cookiesOption[] = 'string-contains=' . $cookieName;
 842                 }
 843                 $this->addVaryHeader( 'Cookie', $cookiesOption );
 844
 845                 $headers = array();
 846                 foreach( $this->mVaryHeader as $header => $option ) {
 847                         $newheader = $header;
 848                         if( is_array( $option ) )
 849                                 $newheader .= ';' . implode( ';', $option );
 850                         $headers[] = $newheader;
 851                 }
 852                 $xvo = 'X-Vary-Options: ' . implode( ',', $headers );
 853
 854                 return $xvo;
 855         }
 856
 857         /** bug 21672: Add Accept-Language to Vary and XVO headers
 858                 if there's no 'variant' parameter existed in GET.
 859
 860                 For example:
 861                  /w/index.php?title=Main_page should always be served; but
 862                  /w/index.php?title=Main_page&variant=zh-cn should never be served.
 863
 864                 patched by Liangent and Philip */
 865         function addAcceptLanguage() {
 866                 global $wgRequest, $wgContLang;
 867                 if( !$wgRequest->getCheck('variant') && $wgContLang->hasVariants() ) {
 868                         $variants = $wgContLang->getVariants();
 869                         $aloption = array();
 870                         foreach ( $variants as $variant ) {
 871                                 if( $variant === $wgContLang->getCode() )
 872                                         continue;
 873                                 else
 874                                         $aloption[] = "string-contains=$variant";
 875                         }
 876                         $this->addVaryHeader( 'Accept-Language', $aloption );
 877                 }
 878         }
 879
 880         public function sendCacheControl() {
 881                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest, $wgUseXVO;
 882
 883                 $response = $wgRequest->response();
 884                 if ($wgUseETag && $this->mETag)
 885                         $response->header("ETag: $this->mETag");
 886
 887                 $this->addAcceptLanguage();
 888
 889                 # don't serve compressed data to clients who can't handle it
 890                 # maintain different caches for logged-in users and non-logged in ones
 891                 $response->header( 'Vary: ' . join( ', ', array_keys( $this->mVaryHeader ) ) );
 892
 893                 if ( $wgUseXVO ) {
 894                         # Add an X-Vary-Options header for Squid with Wikimedia patches
 895                         $response->header( $this->getXVO() );
 896                 }
 897
 898                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
 899                         if( $wgUseSquid && session_id() == '' &&
 900                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
 901                         {
 902                                 if ( $wgUseESI ) {
 903                                         # We'll purge the proxy cache explicitly, but require end user agents
 904                                         # to revalidate against the proxy on each visit.
 905                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 906                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
 907                                         # start with a shorter timeout for initial testing
 908                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 909                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 910                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 911                                 } else {
 912                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 913                                         # to revalidate against the proxy on each visit.
 914                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 915                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 916                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
 917                                         # start with a shorter timeout for initial testing
 918                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 919                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 920                                 }
 921                         } else {
 922                                 # We do want clients to cache if they can, but they *must* check for updates
 923                                 # on revisiting the page.
 924                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
 925                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 926                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
 927                         }
 928                         if($this->mLastModified) {
 929                                 $response->header( "Last-Modified: {$this->mLastModified}" );
 930                         }
 931                 } else {
 932                         wfDebug( __METHOD__ . ": no caching **\n", false );
 933
 934                         # In general, the absence of a last modified header should be enough to prevent
 935                         # the client from using its cache. We send a few other things just to make sure.
 936                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 937                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 938                         $response->header( 'Pragma: no-cache' );
 939                 }
 940                 wfRunHooks('CacheHeadersAfterSet', array( $this ) );
 941         }
 942
 943         /**
 944          * Get the message associed with the HTTP response code $code
 945          *
 946          * @param $code Integer: status code
 947          * @return String or null: message or null if $code is not in the list of
 948          *         messages
 949          */
 950         public static function getStatusMessage( $code ) {
 951                 static $statusMessage = array(
 952                         100 => 'Continue',
 953                         101 => 'Switching Protocols',
 954                         102 => 'Processing',
 955                         200 => 'OK',
 956                         201 => 'Created',
 957                         202 => 'Accepted',
 958                         203 => 'Non-Authoritative Information',
 959                         204 => 'No Content',
 960                         205 => 'Reset Content',
 961                         206 => 'Partial Content',
 962                         207 => 'Multi-Status',
 963                         300 => 'Multiple Choices',
 964                         301 => 'Moved Permanently',
 965                         302 => 'Found',
 966                         303 => 'See Other',
 967                         304 => 'Not Modified',
 968                         305 => 'Use Proxy',
 969                         307 => 'Temporary Redirect',
 970                         400 => 'Bad Request',
 971                         401 => 'Unauthorized',
 972                         402 => 'Payment Required',
 973                         403 => 'Forbidden',
 974                         404 => 'Not Found',
 975                         405 => 'Method Not Allowed',
 976                         406 => 'Not Acceptable',
 977                         407 => 'Proxy Authentication Required',
 978                         408 => 'Request Timeout',
 979                         409 => 'Conflict',
 980                         410 => 'Gone',
 981                         411 => 'Length Required',
 982                         412 => 'Precondition Failed',
 983                         413 => 'Request Entity Too Large',
 984                         414 => 'Request-URI Too Large',
 985                         415 => 'Unsupported Media Type',
 986                         416 => 'Request Range Not Satisfiable',
 987                         417 => 'Expectation Failed',
 988                         422 => 'Unprocessable Entity',
 989                         423 => 'Locked',
 990                         424 => 'Failed Dependency',
 991                         500 => 'Internal Server Error',
 992                         501 => 'Not Implemented',
 993                         502 => 'Bad Gateway',
 994                         503 => 'Service Unavailable',
 995                         504 => 'Gateway Timeout',
 996                         505 => 'HTTP Version Not Supported',
 997                         507 => 'Insufficient Storage'
 998                 );
 999                 return isset( $statusMessage[$code] ) ? $statusMessage[$code] : null;
1000         }
1001
1002         /**
1003          * Finally, all the text has been munged and accumulated into
1004          * the object, let's actually output it:
1005          */
1006         public function output() {
1007                 global $wgUser, $wgOutputEncoding, $wgRequest;
1008                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
1009                 global $wgUseAjax, $wgAjaxWatch;
1010                 global $wgEnableMWSuggest, $wgUniversalEditButton;
1011                 global $wgArticle;
1012
1013                 if( $this->mDoNothing ){
1014                         return;
1015                 }
1016                 wfProfileIn( __METHOD__ );
1017                 if ( $this->mRedirect != '' ) {
1018                         # Standards require redirect URLs to be absolute
1019                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
1020                         if( $this->mRedirectCode == '301' || $this->mRedirectCode == '303' ) {
1021                                 if( !$wgDebugRedirects ) {
1022                                         $message = self::getStatusMessage( $this->mRedirectCode );
1023                                         $wgRequest->response()->header( "HTTP/1.1 {$this->mRedirectCode} $message" );
1024                                 }
1025                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
1026                         }
1027                         $this->sendCacheControl();
1028
1029                         $wgRequest->response()->header( "Content-Type: text/html; charset=utf-8" );
1030                         if( $wgDebugRedirects ) {
1031                                 $url = htmlspecialchars( $this->mRedirect );
1032                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
1033                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
1034                                 print "</body>\n</html>\n";
1035                         } else {
1036                                 $wgRequest->response()->header( 'Location: ' . $this->mRedirect );
1037                         }
1038                         wfProfileOut( __METHOD__ );
1039                         return;
1040                 } elseif ( $this->mStatusCode ) {
1041                         $message = self::getStatusMessage( $this->mStatusCode );
1042                         if ( $message )
1043                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $message );
1044                 }
1045
1046                 $sk = $wgUser->getSkin();
1047
1048                 if ( $wgUseAjax ) {
1049                         $this->addScriptFile( 'ajax.js' );
1050
1051                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
1052
1053                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
1054                                 $this->addScriptFile( 'ajaxwatch.js' );
1055                         }
1056
1057                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
1058                                 $this->addScriptFile( 'mwsuggest.js' );
1059                         }
1060                 }
1061
1062                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
1063                         $this->addScriptFile( 'rightclickedit.js' );
1064                 }
1065
1066                 if( $wgUniversalEditButton ) {
1067                         if( isset( $wgArticle ) && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
1068                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
1069                                 // Original UniversalEditButton
1070                                 $msg = wfMsg('edit');
1071                                 $this->addLink( array(
1072                                         'rel' => 'alternate',
1073                                         'type' => 'application/x-wiki',
1074                                         'title' => $msg,
1075                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1076                                 ) );
1077                                 // Alternate edit link
1078                                 $this->addLink( array(
1079                                         'rel' => 'edit',
1080                                         'title' => $msg,
1081                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1082                                 ) );
1083                         }
1084                 }
1085
1086                 # Buffer output; final headers may depend on later processing
1087                 ob_start();
1088
1089                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1090                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
1091
1092                 if ($this->mArticleBodyOnly) {
1093                         $this->out($this->mBodytext);
1094                 } else {
1095                         // Hook that allows last minute changes to the output page, e.g.
1096                         // adding of CSS or Javascript by extensions.
1097                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1098
1099                         wfProfileIn( 'Output-skin' );
1100                         $sk->outputPage( $this );
1101                         wfProfileOut( 'Output-skin' );
1102                 }
1103
1104                 $this->sendCacheControl();
1105                 ob_end_flush();
1106                 wfProfileOut( __METHOD__ );
1107         }
1108
1109         /**
1110          * Actually output something with print(). Performs an iconv to the
1111          * output encoding, if needed.
1112          * @param string $ins The string to output
1113          */
1114         public function out( $ins ) {
1115                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1116                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1117                         $outs = $ins;
1118                 } else {
1119                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1120                         if ( false === $outs ) { $outs = $ins; }
1121                 }
1122                 print $outs;
1123         }
1124
1125         /**
1126          * @todo document
1127          */
1128         public static function setEncodings() {
1129                 global $wgInputEncoding, $wgOutputEncoding;
1130                 global $wgContLang;
1131
1132                 $wgInputEncoding = strtolower( $wgInputEncoding );
1133
1134                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
1135                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
1136                         return;
1137                 }
1138                 $wgOutputEncoding = $wgInputEncoding;
1139         }
1140
1141         /**
1142          * Deprecated, use wfReportTime() instead.
1143          * @return string
1144          * @deprecated
1145          */
1146         public function reportTime() {
1147                 wfDeprecated( __METHOD__ );
1148                 $time = wfReportTime();
1149                 return $time;
1150         }
1151
1152         /**
1153          * Produce a "user is blocked" page.
1154          *
1155          * @param bool $return Whether to have a "return to $wgTitle" message or not.
1156          * @return nothing
1157          */
1158         function blockedPage( $return = true ) {
1159                 global $wgUser, $wgContLang, $wgLang;
1160
1161                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1162                 $this->setRobotPolicy( 'noindex,nofollow' );
1163                 $this->setArticleRelated( false );
1164
1165                 $name = User::whoIs( $wgUser->blockedBy() );
1166                 $reason = $wgUser->blockedFor();
1167                 if( $reason == '' ) {
1168                         $reason = wfMsg( 'blockednoreason' );
1169                 }
1170                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
1171                 $ip = wfGetIP();
1172
1173                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1174
1175                 $blockid = $wgUser->mBlock->mId;
1176
1177                 $blockExpiry = $wgUser->mBlock->mExpiry;
1178                 if ( $blockExpiry == 'infinity' ) {
1179                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
1180                         // Search for localization in 'ipboptions'
1181                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
1182                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1183                                 if ( strpos( $option, ":" ) === false )
1184                                         continue;
1185                                 list( $show, $value ) = explode( ":", $option );
1186                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1187                                         $blockExpiry = $show;
1188                                         break;
1189                                 }
1190                         }
1191                 } else {
1192                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
1193                 }
1194
1195                 if ( $wgUser->mBlock->mAuto ) {
1196                         $msg = 'autoblockedtext';
1197                 } else {
1198                         $msg = 'blockedtext';
1199                 }
1200
1201                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1202                  * This could be a username, an ip range, or a single ip. */
1203                 $intended = $wgUser->mBlock->mAddress;
1204
1205                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
1206
1207                 # Don't auto-return to special pages
1208                 if( $return ) {
1209                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1210                         $this->returnToMain( null, $return );
1211                 }
1212         }
1213
1214         /**
1215          * Output a standard error page
1216          *
1217          * @param string $title Message key for page title
1218          * @param string $msg Message key for page text
1219          * @param array $params Message parameters
1220          */
1221         public function showErrorPage( $title, $msg, $params = array() ) {
1222                 if ( $this->getTitle() ) {
1223                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1224                 }
1225                 $this->setPageTitle( wfMsg( $title ) );
1226                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1227                 $this->setRobotPolicy( 'noindex,nofollow' );
1228                 $this->setArticleRelated( false );
1229                 $this->enableClientCache( false );
1230                 $this->mRedirect = '';
1231                 $this->mBodytext = '';
1232
1233                 array_unshift( $params, 'parse' );
1234                 array_unshift( $params, $msg );
1235                 $this->addHTML( call_user_func_array( 'wfMsgExt', $params ) );
1236
1237                 $this->returnToMain();
1238         }
1239
1240         /**
1241          * Output a standard permission error page
1242          *
1243          * @param array $errors Error message keys
1244          */
1245         public function showPermissionsErrorPage( $errors, $action = null )
1246         {
1247                 $this->mDebugtext .= 'Original title: ' .
1248                 $this->getTitle()->getPrefixedText() . "\n";
1249                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1250                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1251                 $this->setRobotPolicy( 'noindex,nofollow' );
1252                 $this->setArticleRelated( false );
1253                 $this->enableClientCache( false );
1254                 $this->mRedirect = '';
1255                 $this->mBodytext = '';
1256                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1257         }
1258
1259         /** @deprecated */
1260         public function errorpage( $title, $msg ) {
1261                 wfDeprecated( __METHOD__ );
1262                 throw new ErrorPageError( $title, $msg );
1263         }
1264
1265         /**
1266          * Display an error page indicating that a given version of MediaWiki is
1267          * required to use it
1268          *
1269          * @param mixed $version The version of MediaWiki needed to use the page
1270          */
1271         public function versionRequired( $version ) {
1272                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1273                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1274                 $this->setRobotPolicy( 'noindex,nofollow' );
1275                 $this->setArticleRelated( false );
1276                 $this->mBodytext = '';
1277
1278                 $this->addWikiMsg( 'versionrequiredtext', $version );
1279                 $this->returnToMain();
1280         }
1281
1282         /**
1283          * Display an error page noting that a given permission bit is required.
1284          *
1285          * @param string $permission key required
1286          */
1287         public function permissionRequired( $permission ) {
1288                 global $wgLang;
1289
1290                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1291                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1292                 $this->setRobotPolicy( 'noindex,nofollow' );
1293                 $this->setArticleRelated( false );
1294                 $this->mBodytext = '';
1295
1296                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1297                         User::getGroupsWithPermission( $permission ) );
1298                 if( $groups ) {
1299                         $this->addWikiMsg( 'badaccess-groups',
1300                                 $wgLang->commaList( $groups ),
1301                                 count( $groups) );
1302                 } else {
1303                         $this->addWikiMsg( 'badaccess-group0' );
1304                 }
1305                 $this->returnToMain();
1306         }
1307
1308         /**
1309          * Use permissionRequired.
1310          * @deprecated
1311          */
1312         public function sysopRequired() {
1313                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1314         }
1315
1316         /**
1317          * Use permissionRequired.
1318          * @deprecated
1319          */
1320         public function developerRequired() {
1321                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1322         }
1323
1324         /**
1325          * Produce the stock "please login to use the wiki" page
1326          */
1327         public function loginToUse() {
1328                 global $wgUser, $wgContLang;
1329
1330                 if( $wgUser->isLoggedIn() ) {
1331                         $this->permissionRequired( 'read' );
1332                         return;
1333                 }
1334
1335                 $skin = $wgUser->getSkin();
1336
1337                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1338                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1339                 $this->setRobotPolicy( 'noindex,nofollow' );
1340                 $this->setArticleFlag( false );
1341
1342                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1343                 $loginLink = $skin->link(
1344                         $loginTitle,
1345                         wfMsgHtml( 'loginreqlink' ),
1346                         array(),
1347                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
1348                         array( 'known', 'noclasses' )
1349                 );
1350                 $this->addHTML( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1351                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . "-->" );
1352
1353                 # Don't return to the main page if the user can't read it
1354                 # otherwise we'll end up in a pointless loop
1355                 $mainPage = Title::newMainPage();
1356                 if( $mainPage->userCanRead() )
1357                         $this->returnToMain( null, $mainPage );
1358         }
1359
1360         /** @deprecated */
1361         public function databaseError( $fname, $sql, $error, $errno ) {
1362                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1363         }
1364
1365         /**
1366          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1367          * @return string The wikitext error-messages, formatted into a list.
1368          */
1369         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1370                 if ($action == null) {
1371                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1372                 } else {
1373                         global $wgLang;
1374                         $action_desc = wfMsgNoTrans( "action-$action" );
1375                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1376                 }
1377
1378                 if (count( $errors ) > 1) {
1379                         $text .= '<ul class="permissions-errors">' . "\n";
1380
1381                         foreach( $errors as $error )
1382                         {
1383                                 $text .= '<li>';
1384                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1385                                 $text .= "</li>\n";
1386                         }
1387                         $text .= '</ul>';
1388                 } else {
1389                         $text .= "<div class=\"permissions-errors\">\n" . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . "\n</div>";
1390                 }
1391
1392                 return $text;
1393         }
1394
1395         /**
1396          * Display a page stating that the Wiki is in read-only mode,
1397          * and optionally show the source of the page that the user
1398          * was trying to edit.  Should only be called (for this
1399          * purpose) after wfReadOnly() has returned true.
1400          *
1401          * For historical reasons, this function is _also_ used to
1402          * show the error message when a user tries to edit a page
1403          * they are not allowed to edit.  (Unless it's because they're
1404          * blocked, then we show blockedPage() instead.)  In this
1405          * case, the second parameter should be set to true and a list
1406          * of reasons supplied as the third parameter.
1407          *
1408          * @todo Needs to be split into multiple functions.
1409          *
1410          * @param string $source    Source code to show (or null).
1411          * @param bool   $protected Is this a permissions error?
1412          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1413          */
1414         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1415                 global $wgUser;
1416                 $skin = $wgUser->getSkin();
1417
1418                 $this->setRobotPolicy( 'noindex,nofollow' );
1419                 $this->setArticleRelated( false );
1420
1421                 // If no reason is given, just supply a default "I can't let you do
1422                 // that, Dave" message.  Should only occur if called by legacy code.
1423                 if ( $protected && empty($reasons) ) {
1424                         $reasons[] = array( 'badaccess-group0' );
1425                 }
1426
1427                 if ( !empty($reasons) ) {
1428                         // Permissions error
1429                         if( $source ) {
1430                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1431                                 $this->setSubtitle(
1432                                         wfMsg(
1433                                                 'viewsourcefor',
1434                                                 $skin->link(
1435                                                         $this->getTitle(),
1436                                                         null,
1437                                                         array(),
1438                                                         array(),
1439                                                         array( 'known', 'noclasses' )
1440                                                 )
1441                                         )
1442                                 );
1443                         } else {
1444                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1445                         }
1446                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1447                 } else {
1448                         // Wiki is read only
1449                         $this->setPageTitle( wfMsg( 'readonly' ) );
1450                         $reason = wfReadOnlyReason();
1451                         $this->wrapWikiMsg( '<div class="mw-readonly-error">\n$1</div>', array( 'readonlytext', $reason ) );
1452                 }
1453
1454                 // Show source, if supplied
1455                 if( is_string( $source ) ) {
1456                         $this->addWikiMsg( 'viewsourcetext' );
1457
1458                         $params = array(
1459                                 'id'   => 'wpTextbox1',
1460                                 'name' => 'wpTextbox1',
1461                                 'cols' => $wgUser->getOption( 'cols' ),
1462                                 'rows' => $wgUser->getOption( 'rows' ),
1463                                 'readonly' => 'readonly'
1464                         );
1465                         $this->addHTML( Html::element( 'textarea', $params, $source ) );
1466
1467                         // Show templates used by this article
1468                         $skin = $wgUser->getSkin();
1469                         $article = new Article( $this->getTitle() );
1470                         $this->addHTML( "<div class='templatesUsed'>
1471 {$skin->formatTemplates( $article->getUsedTemplates() )}
1472 </div>
1473 " );
1474                 }
1475
1476                 # If the title doesn't exist, it's fairly pointless to print a return
1477                 # link to it.  After all, you just tried editing it and couldn't, so
1478                 # what's there to do there?
1479                 if( $this->getTitle()->exists() ) {
1480                         $this->returnToMain( null, $this->getTitle() );
1481                 }
1482         }
1483
1484         /** @deprecated */
1485         public function fatalError( $message ) {
1486                 wfDeprecated( __METHOD__ );
1487                 throw new FatalError( $message );
1488         }
1489
1490         /** @deprecated */
1491         public function unexpectedValueError( $name, $val ) {
1492                 wfDeprecated( __METHOD__ );
1493                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1494         }
1495
1496         /** @deprecated */
1497         public function fileCopyError( $old, $new ) {
1498                 wfDeprecated( __METHOD__ );
1499                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1500         }
1501
1502         /** @deprecated */
1503         public function fileRenameError( $old, $new ) {
1504                 wfDeprecated( __METHOD__ );
1505                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1506         }
1507
1508         /** @deprecated */
1509         public function fileDeleteError( $name ) {
1510                 wfDeprecated( __METHOD__ );
1511                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1512         }
1513
1514         /** @deprecated */
1515         public function fileNotFoundError( $name ) {
1516                 wfDeprecated( __METHOD__ );
1517                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1518         }
1519
1520         public function showFatalError( $message ) {
1521                 $this->setPageTitle( wfMsg( "internalerror" ) );
1522                 $this->setRobotPolicy( "noindex,nofollow" );
1523                 $this->setArticleRelated( false );
1524                 $this->enableClientCache( false );
1525                 $this->mRedirect = '';
1526                 $this->mBodytext = $message;
1527         }
1528
1529         public function showUnexpectedValueError( $name, $val ) {
1530                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1531         }
1532
1533         public function showFileCopyError( $old, $new ) {
1534                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1535         }
1536
1537         public function showFileRenameError( $old, $new ) {
1538                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1539         }
1540
1541         public function showFileDeleteError( $name ) {
1542                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1543         }
1544
1545         public function showFileNotFoundError( $name ) {
1546                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1547         }
1548
1549         /**
1550          * Add a "return to" link pointing to a specified title
1551          *
1552          * @param $title Title to link
1553          * @param $query String: query string
1554          */
1555         public function addReturnTo( $title, $query = array() ) {
1556                 global $wgUser;
1557                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullUrl() ) );
1558                 $link = wfMsgHtml( 'returnto', $wgUser->getSkin()->link(
1559                         $title, null, array(), $query ) );
1560                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
1561         }
1562
1563         /**
1564          * Add a "return to" link pointing to a specified title,
1565          * or the title indicated in the request, or else the main page
1566          *
1567          * @param $unused No longer used
1568          * @param $returnto Title or String to return to
1569          * @param $returntoquery String: query string for the return to link
1570          */
1571         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
1572                 global $wgRequest;
1573
1574                 if ( $returnto == null ) {
1575                         $returnto = $wgRequest->getText( 'returnto' );
1576                 }
1577
1578                 if ( $returntoquery == null ) {
1579                         $returntoquery = $wgRequest->getText( 'returntoquery' );
1580                 }
1581
1582                 if ( $returnto === '' ) {
1583                         $returnto = Title::newMainPage();
1584                 }
1585
1586                 if ( is_object( $returnto ) ) {
1587                         $titleObj = $returnto;
1588                 } else {
1589                         $titleObj = Title::newFromText( $returnto );
1590                 }
1591                 if ( !is_object( $titleObj ) ) {
1592                         $titleObj = Title::newMainPage();
1593                 }
1594
1595                 $this->addReturnTo( $titleObj, $returntoquery );
1596         }
1597
1598         /**
1599          * @return string The doctype, opening <html>, and head element.
1600          *
1601          * @param $sk Skin The given Skin
1602          */
1603         public function headElement( Skin $sk, $includeStyle = true ) {
1604                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1605                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces, $wgHtml5Version;
1606                 global $wgContLang, $wgUseTrackbacks, $wgStyleVersion, $wgHtml5, $wgWellFormedXml;
1607
1608                 $this->addMeta( "http:Content-Type", "$wgMimeType; charset={$wgOutputEncoding}" );
1609                 if ( $sk->commonPrintStylesheet() ) {
1610                         $this->addStyle( 'common/wikiprintable.css', 'print' );
1611                 }
1612                 $sk->setupUserCss( $this );
1613
1614                 $ret = '';
1615
1616                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1617                         $ret .= "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
1618                 }
1619
1620                 if ( $this->getHTMLTitle() == '' ) {
1621                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1622                 }
1623
1624                 $dir = $wgContLang->getDir();
1625
1626                 if ( $wgHtml5 ) {
1627                         if ( $wgWellFormedXml ) {
1628                                 # Unknown elements and attributes are okay in XML, but unknown
1629                                 # named entities are well-formedness errors and will break XML
1630                                 # parsers.  Thus we need a doctype that gives us appropriate
1631                                 # entity definitions.  The HTML5 spec permits four legacy
1632                                 # doctypes as obsolete but conforming, so let's pick one of
1633                                 # those, although it makes our pages look like XHTML1 Strict.
1634                                 # Isn't compatibility great?
1635                                 $ret .= "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n";
1636                         } else {
1637                                 # Much saner.
1638                                 $ret .= "<!doctype html>\n";
1639                         }
1640                         $ret .= "<html lang=\"$wgContLanguageCode\" dir=\"$dir\" ";
1641                         if ( $wgHtml5Version ) $ret .= " version=\"$wgHtml5Version\" ";
1642                         $ret .= ">\n";
1643                 } else {
1644                         $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\" \"$wgDTD\">\n";
1645                         $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1646                         foreach($wgXhtmlNamespaces as $tag => $ns) {
1647                                 $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1648                         }
1649                         $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" dir=\"$dir\">\n";
1650                 }
1651
1652                 $ret .= "<head>\n";
1653                 $ret .= "<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1654                 $ret .= implode( "\n", array(
1655                         $this->getHeadLinks(),
1656                         $this->buildCssLinks(),
1657                         $this->getHeadScripts( $sk ),
1658                         $this->getHeadItems(),
1659                 ));
1660                 if( $sk->usercss ){
1661                         $ret .= Html::inlineStyle( $sk->usercss );
1662                 }
1663
1664                 if ($wgUseTrackbacks && $this->isArticleRelated())
1665                         $ret .= $this->getTitle()->trackbackRDF();
1666
1667                 $ret .= "</head>\n";
1668                 return $ret;
1669         }
1670
1671         /*
1672          * gets the global variables and mScripts
1673          *
1674          * also adds userjs to the end if enabled:
1675         */
1676         function getHeadScripts( Skin $sk ) {
1677                 global $wgUser, $wgRequest, $wgJsMimeType, $wgUseSiteJs;
1678                 global $wgStylePath, $wgStyleVersion;
1679
1680                 $scripts = Skin::makeGlobalVariablesScript( $sk->getSkinName() );
1681                 $scripts .= Html::linkedScript( "{$wgStylePath}/common/wikibits.js?$wgStyleVersion" );
1682
1683                 //add site JS if enabled:
1684                 if( $wgUseSiteJs ) {
1685                         $jsCache = $wgUser->isLoggedIn() ? '&smaxage=0' : '';
1686                         $this->addScriptFile(  Skin::makeUrl( '-',
1687                                         "action=raw$jsCache&gen=js&useskin=" .
1688                                         urlencode( $sk->getSkinName() )
1689                                         )
1690                                 );
1691                 }
1692
1693                 //add user js if enabled:
1694                 if( $this->isUserJsAllowed() && $wgUser->isLoggedIn() ) {
1695                         $action = $wgRequest->getVal( 'action', 'view' );
1696                         if( $this->mTitle && $this->mTitle->isJsSubpage() and $sk->userCanPreview( $action ) ) {
1697                                 # XXX: additional security check/prompt?
1698                                 $this->addInlineScript( $wgRequest->getText( 'wpTextbox1' ) );
1699                         } else {
1700                                 $userpage = $wgUser->getUserPage();
1701                                 $userjs = Skin::makeUrl(
1702                                         $userpage->getPrefixedText() . '/' . $sk->getSkinName() . '.js',
1703                                         'action=raw&ctype=' . $wgJsMimeType );
1704                                 $this->addScriptFile( $userjs );
1705                         }
1706                 }
1707
1708                 $scripts .= "\n" . $this->mScripts;
1709                 return $scripts;
1710         }
1711
1712         protected function addDefaultMeta() {
1713                 global $wgVersion, $wgHtml5;
1714
1715                 static $called = false;
1716                 if ( $called ) {
1717                         # Don't run this twice
1718                         return;
1719                 }
1720                 $called = true;
1721
1722                 if ( !$wgHtml5 ) {
1723                         $this->addMeta( 'http:Content-Style-Type', 'text/css' ); //bug 15835
1724                 }
1725                 $this->addMeta( 'generator', "MediaWiki $wgVersion" );
1726
1727                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
1728                 if( $p !== 'index,follow' ) {
1729                         // http://www.robotstxt.org/wc/meta-user.html
1730                         // Only show if it's different from the default robots policy
1731                         $this->addMeta( 'robots', $p );
1732                 }
1733
1734                 if ( count( $this->mKeywords ) > 0 ) {
1735                         $strip = array(
1736                                 "/<.*?" . ">/" => '',
1737                                 "/_/" => ' '
1738                         );
1739                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
1740                 }
1741         }
1742
1743         /**
1744          * @return string HTML tag links to be put in the header.
1745          */
1746         public function getHeadLinks() {
1747                 global $wgRequest, $wgFeed;
1748
1749                 // Ideally this should happen earlier, somewhere. :P
1750                 $this->addDefaultMeta();
1751
1752                 $tags = array();
1753
1754                 foreach ( $this->mMetatags as $tag ) {
1755                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1756                                 $a = 'http-equiv';
1757                                 $tag[0] = substr( $tag[0], 5 );
1758                         } else {
1759                                 $a = 'name';
1760                         }
1761                         $tags[] = Html::element( 'meta',
1762                                 array(
1763                                         $a => $tag[0],
1764                                         'content' => $tag[1] ) );
1765                 }
1766                 foreach ( $this->mLinktags as $tag ) {
1767                         $tags[] = Html::element( 'link', $tag );
1768                 }
1769
1770                 if( $wgFeed ) {
1771                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1772                                 # Use the page name for the title (accessed through $wgTitle since
1773                                 # there's no other way).  In principle, this could lead to issues
1774                                 # with having the same name for different feeds corresponding to
1775                                 # the same page, but we can't avoid that at this low a level.
1776
1777                                 $tags[] = $this->feedLink(
1778                                         $format,
1779                                         $link,
1780                                         # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1781                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() ) );
1782                         }
1783
1784                         # Recent changes feed should appear on every page (except recentchanges,
1785                         # that would be redundant). Put it after the per-page feed to avoid
1786                         # changing existing behavior. It's still available, probably via a
1787                         # menu in your browser. Some sites might have a different feed they'd
1788                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
1789                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
1790                         # If so, use it instead.
1791
1792                         global $wgOverrideSiteFeed, $wgSitename, $wgFeedClasses, $wgAdvertisedFeedTypes;
1793                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1794
1795                         if ( $wgOverrideSiteFeed ) {
1796                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
1797                                         $tags[] = $this->feedLink (
1798                                                 $type,
1799                                                 htmlspecialchars( $feedUrl ),
1800                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
1801                                 }
1802                         } elseif ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
1803                                 foreach ( $wgAdvertisedFeedTypes as $format ) {
1804                                         $tags[] = $this->feedLink(
1805                                                 $format,
1806                                                 $rctitle->getLocalURL( "feed={$format}" ),
1807                                                 wfMsg( "site-{$format}-feed", $wgSitename ) ); # For grep: 'site-rss-feed', 'site-atom-feed'.
1808                                 }
1809                         }
1810                 }
1811
1812                 return implode( "\n", $tags );
1813         }
1814
1815         /**
1816          * Return URLs for each supported syndication format for this page.
1817          * @return array associating format keys with URLs
1818          */
1819         public function getSyndicationLinks() {
1820                 return $this->mFeedLinks;
1821         }
1822
1823         /**
1824          * Generate a <link rel/> for an RSS feed.
1825          */
1826         private function feedLink( $type, $url, $text ) {
1827                 return Html::element( 'link', array(
1828                         'rel' => 'alternate',
1829                         'type' => "application/$type+xml",
1830                         'title' => $text,
1831                         'href' => $url ) );
1832         }
1833
1834         /**
1835          * Add a local or specified stylesheet, with the given media options.
1836          * Meant primarily for internal use...
1837          *
1838          * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
1839          * @param $conditional -- for IE conditional comments, specifying an IE version
1840          * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
1841          */
1842         public function addStyle( $style, $media='', $condition='', $dir='' ) {
1843                 $options = array();
1844                 // Even though we expect the media type to be lowercase, but here we
1845                 // force it to lowercase to be safe.
1846                 if( $media )
1847                         $options['media'] = $media;
1848                 if( $condition )
1849                         $options['condition'] = $condition;
1850                 if( $dir )
1851                         $options['dir'] = $dir;
1852                 $this->styles[$style] = $options;
1853         }
1854
1855         /**
1856          * Adds inline CSS styles
1857          * @param $style_css Mixed: inline CSS
1858          */
1859         public function addInlineStyle( $style_css ){
1860                 $this->mScripts .= Html::inlineStyle( $style_css );
1861         }
1862
1863         /**
1864          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
1865          * These will be applied to various media & IE conditionals.
1866          */
1867         public function buildCssLinks() {
1868                 $links = array();
1869                 foreach( $this->styles as $file => $options ) {
1870                         $link = $this->styleLink( $file, $options );
1871                         if( $link )
1872                                 $links[] = $link;
1873                 }
1874
1875                 return implode( "\n", $links );
1876         }
1877
1878         protected function styleLink( $style, $options ) {
1879                 global $wgRequest;
1880
1881                 if( isset( $options['dir'] ) ) {
1882                         global $wgContLang;
1883                         $siteDir = $wgContLang->getDir();
1884                         if( $siteDir != $options['dir'] )
1885                                 return '';
1886                 }
1887
1888                 if( isset( $options['media'] ) ) {
1889                         $media = $this->transformCssMedia( $options['media'] );
1890                         if( is_null( $media ) ) {
1891                                 return '';
1892                         }
1893                 } else {
1894                         $media = 'all';
1895                 }
1896
1897                 if( substr( $style, 0, 1 ) == '/' ||
1898                         substr( $style, 0, 5 ) == 'http:' ||
1899                         substr( $style, 0, 6 ) == 'https:' ) {
1900                         $url = $style;
1901                 } else {
1902                         global $wgStylePath, $wgStyleVersion;
1903                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
1904                 }
1905
1906                 $link = Html::linkedStyle( $url, $media );
1907
1908                 if( isset( $options['condition'] ) ) {
1909                         $condition = htmlspecialchars( $options['condition'] );
1910                         $link = "<!--[if $condition]>$link<![endif]-->";
1911                 }
1912                 return $link;
1913         }
1914
1915         function transformCssMedia( $media ) {
1916                 global $wgRequest, $wgHandheldForIPhone;
1917
1918                 // Switch in on-screen display for media testing
1919                 $switches = array(
1920                         'printable' => 'print',
1921                         'handheld' => 'handheld',
1922                 );
1923                 foreach( $switches as $switch => $targetMedia ) {
1924                         if( $wgRequest->getBool( $switch ) ) {
1925                                 if( $media == $targetMedia ) {
1926                                         $media = '';
1927                                 } elseif( $media == 'screen' ) {
1928                                         return null;
1929                                 }
1930                         }
1931                 }
1932
1933                 // Expand longer media queries as iPhone doesn't grok 'handheld'
1934                 if( $wgHandheldForIPhone ) {
1935                         $mediaAliases = array(
1936                                 'screen' => 'screen and (min-device-width: 481px)',
1937                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
1938                         );
1939
1940                         if( isset( $mediaAliases[$media] ) ) {
1941                                 $media = $mediaAliases[$media];
1942                         }
1943                 }
1944
1945                 return $media;
1946         }
1947
1948         /**
1949          * Turn off regular page output and return an error reponse
1950          * for when rate limiting has triggered.
1951          */
1952         public function rateLimited() {
1953
1954                 $this->setPageTitle(wfMsg('actionthrottled'));
1955                 $this->setRobotPolicy( 'noindex,follow' );
1956                 $this->setArticleRelated( false );
1957                 $this->enableClientCache( false );
1958                 $this->mRedirect = '';
1959                 $this->clearHTML();
1960                 $this->setStatusCode(503);
1961                 $this->addWikiMsg( 'actionthrottledtext' );
1962
1963                 $this->returnToMain( null, $this->getTitle() );
1964         }
1965
1966         /**
1967          * Show an "add new section" link?
1968          *
1969          * @return bool
1970          */
1971         public function showNewSectionLink() {
1972                 return $this->mNewSectionLink;
1973         }
1974
1975         /**
1976         * Forcibly hide the new section link?
1977         *
1978         * @return bool
1979         */
1980         public function forceHideNewSectionLink() {
1981                 return $this->mHideNewSectionLink;
1982         }
1983
1984         /**
1985          * Show a warning about slave lag
1986          *
1987          * If the lag is higher than $wgSlaveLagCritical seconds,
1988          * then the warning is a bit more obvious. If the lag is
1989          * lower than $wgSlaveLagWarning, then no warning is shown.
1990          *
1991          * @param int $lag Slave lag
1992          */
1993         public function showLagWarning( $lag ) {
1994                 global $wgSlaveLagWarning, $wgSlaveLagCritical, $wgLang;
1995                 if( $lag >= $wgSlaveLagWarning ) {
1996                         $message = $lag < $wgSlaveLagCritical
1997                                 ? 'lag-warn-normal'
1998                                 : 'lag-warn-high';
1999                         $wrap = Html::rawElement( 'div', array( 'class' => "mw-{$message}" ), "\n$1\n" );
2000                         $this->wrapWikiMsg( "$wrap\n", array( $message, $wgLang->formatNum( $lag ) ) );
2001                 }
2002         }
2003
2004         /**
2005          * Add a wikitext-formatted message to the output.
2006          * This is equivalent to:
2007          *
2008          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
2009          */
2010         public function addWikiMsg( /*...*/ ) {
2011                 $args = func_get_args();
2012                 $name = array_shift( $args );
2013                 $this->addWikiMsgArray( $name, $args );
2014         }
2015
2016         /**
2017          * Add a wikitext-formatted message to the output.
2018          * Like addWikiMsg() except the parameters are taken as an array
2019          * instead of a variable argument list.
2020          *
2021          * $options is passed through to wfMsgExt(), see that function for details.
2022          */
2023         public function addWikiMsgArray( $name, $args, $options = array() ) {
2024                 $options[] = 'parse';
2025                 $text = wfMsgExt( $name, $options, $args );
2026                 $this->addHTML( $text );
2027         }
2028
2029         /**
2030          * This function takes a number of message/argument specifications, wraps them in
2031          * some overall structure, and then parses the result and adds it to the output.
2032          *
2033          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
2034          * on. The subsequent arguments may either be strings, in which case they are the
2035          * message names, or arrays, in which case the first element is the message name,
2036          * and subsequent elements are the parameters to that message.
2037          *
2038          * The special named parameter 'options' in a message specification array is passed
2039          * through to the $options parameter of wfMsgExt().
2040          *
2041          * Don't use this for messages that are not in users interface language.
2042          *
2043          * For example:
2044          *
2045          *    $wgOut->wrapWikiMsg( "<div class='error'>\n$1</div>", 'some-error' );
2046          *
2047          * Is equivalent to:
2048          *
2049          *    $wgOut->addWikiText( "<div class='error'>\n" . wfMsgNoTrans( 'some-error' ) . '</div>' );
2050          *
2051          * The newline after opening div is needed in some wikitext. See bug 19226.
2052          */
2053         public function wrapWikiMsg( $wrap /*, ...*/ ) {
2054                 $msgSpecs = func_get_args();
2055                 array_shift( $msgSpecs );
2056                 $msgSpecs = array_values( $msgSpecs );
2057                 $s = $wrap;
2058                 foreach ( $msgSpecs as $n => $spec ) {
2059                         $options = array();
2060                         if ( is_array( $spec ) ) {
2061                                 $args = $spec;
2062                                 $name = array_shift( $args );
2063                                 if ( isset( $args['options'] ) ) {
2064                                         $options = $args['options'];
2065                                         unset( $args['options'] );
2066                                 }
2067                         }  else {
2068                                 $args = array();
2069                                 $name = $spec;
2070                         }
2071                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
2072                 }
2073                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
2074         }
2075 }