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         /**
  51          * Whether to load jQuery core.
  52          */
  53         protected $mIncludeJQuery = false;
  54
  55         private $mIndexPolicy = 'index';
  56         private $mFollowPolicy = 'follow';
  57         private $mVaryHeader = array( 'Accept-Encoding' => array('list-contains=gzip'),
  58                                                                   'Cookie' => null );
  59
  60         /**
  61          * Constructor
  62          * Initialise private variables
  63          */
  64         function __construct() {
  65                 global $wgAllowUserJs;
  66                 $this->mAllowUserJs = $wgAllowUserJs;
  67         }
  68
  69         public function redirect( $url, $responsecode = '302' ) {
  70                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  71                 $this->mRedirect = str_replace( "\n", '', $url );
  72                 $this->mRedirectCode = $responsecode;
  73         }
  74
  75         public function getRedirect() {
  76                 return $this->mRedirect;
  77         }
  78
  79         /**
  80          * Set the HTTP status code to send with the output.
  81          *
  82          * @param int $statusCode
  83          * @return nothing
  84          */
  85         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  86
  87         /**
  88          * Add a new <meta> tag
  89          * To add an http-equiv meta tag, precede the name with "http:"
  90          *
  91          * @param $name tag name
  92          * @param $val tag value
  93          */
  94         function addMeta( $name, $val ) {
  95                 array_push( $this->mMetatags, array( $name, $val ) );
  96         }
  97
  98         function addKeyword( $text ) {
  99                 if( is_array( $text )) {
 100                         $this->mKeywords = array_merge( $this->mKeywords, $text );
 101                 } else {
 102                         array_push( $this->mKeywords, $text );
 103                 }
 104         }
 105         function addScript( $script ) {
 106                 $this->mScripts .= $script . "\n";
 107         }
 108
 109         /**
 110          * Register and add a stylesheet from an extension directory.
 111          * @param $url String path to sheet.  Provide either a full url (beginning
 112          *             with 'http', etc) or a relative path from the document root
 113          *             (beginning with '/').  Otherwise it behaves identically to
 114          *             addStyle() and draws from the /skins folder.
 115          */
 116         public function addExtensionStyle( $url ) {
 117                 array_push( $this->mExtStyles, $url );
 118         }
 119
 120         /**
 121          * Add a JavaScript file out of skins/common, or a given relative path.
 122          * @param string $file filename in skins/common or complete on-server path (/foo/bar.js)
 123          */
 124         function addScriptFile( $file ) {
 125                 global $wgStylePath, $wgStyleVersion;
 126                 if( substr( $file, 0, 1 ) == '/' ) {
 127                         $path = $file;
 128                 } else {
 129                         $path =  "{$wgStylePath}/common/{$file}";
 130                 }
 131                 $this->addScript( Html::linkedScript( "$path?$wgStyleVersion" ) );
 132         }
 133
 134         /**
 135          * Add a self-contained script tag with the given contents
 136          * @param string $script JavaScript text, no <script> tags
 137          */
 138         function addInlineScript( $script ) {
 139                 $this->mScripts .= Html::inlineScript( "\n$script\n" ) . "\n";
 140         }
 141
 142         /**
 143          * Get all registered JS and CSS tags for the header.
 144          */
 145         function getScript() {
 146                 return $this->mScripts . $this->getHeadItems();
 147         }
 148
 149         function getHeadItems() {
 150                 $s = '';
 151                 foreach ( $this->mHeadItems as $item ) {
 152                         $s .= $item;
 153                 }
 154                 return $s;
 155         }
 156
 157         function addHeadItem( $name, $value ) {
 158                 $this->mHeadItems[$name] = $value;
 159         }
 160
 161         function hasHeadItem( $name ) {
 162                 return isset( $this->mHeadItems[$name] );
 163         }
 164
 165         function setETag($tag) { $this->mETag = $tag; }
 166         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 167         function getArticleBodyOnly() { return $this->mArticleBodyOnly; }
 168
 169         function addLink( $linkarr ) {
 170                 # $linkarr should be an associative array of attributes. We'll escape on output.
 171                 array_push( $this->mLinktags, $linkarr );
 172         }
 173
 174         # Get all links added by extensions
 175         function getExtStyle() {
 176                 return $this->mExtStyles;
 177         }
 178
 179         function addMetadataLink( $linkarr ) {
 180                 # note: buggy CC software only reads first "meta" link
 181                 static $haveMeta = false;
 182                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 183                 $this->addLink( $linkarr );
 184                 $haveMeta = true;
 185         }
 186
 187         /**
 188          * checkLastModified tells the client to use the client-cached page if
 189          * possible. If sucessful, the OutputPage is disabled so that
 190          * any future call to OutputPage->output() have no effect.
 191          *
 192          * Side effect: sets mLastModified for Last-Modified header
 193          *
 194          * @return bool True iff cache-ok headers was sent.
 195          */
 196         function checkLastModified( $timestamp ) {
 197                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 198
 199                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 200                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 201                         return false;
 202                 }
 203                 if( !$wgCachePages ) {
 204                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 205                         return false;
 206                 }
 207                 if( $wgUser->getOption( 'nocache' ) ) {
 208                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 209                         return false;
 210                 }
 211
 212                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 213                 $modifiedTimes = array(
 214                         'page' => $timestamp,
 215                         'user' => $wgUser->getTouched(),
 216                         'epoch' => $wgCacheEpoch
 217                 );
 218                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 219
 220                 $maxModified = max( $modifiedTimes );
 221                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 222
 223                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 224                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 225                         return false;
 226                 }
 227
 228                 # Make debug info
 229                 $info = '';
 230                 foreach ( $modifiedTimes as $name => $value ) {
 231                         if ( $info !== '' ) {
 232                                 $info .= ', ';
 233                         }
 234                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 235                 }
 236
 237                 # IE sends sizes after the date like this:
 238                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 239                 # this breaks strtotime().
 240                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 241
 242                 wfSuppressWarnings(); // E_STRICT system time bitching
 243                 $clientHeaderTime = strtotime( $clientHeader );
 244                 wfRestoreWarnings();
 245                 if ( !$clientHeaderTime ) {
 246                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 247                         return false;
 248                 }
 249                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 250
 251                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 252                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 253                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 254                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 255                 if( $clientHeaderTime < $maxModified ) {
 256                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 257                         return false;
 258                 }
 259
 260                 # Not modified
 261                 # Give a 304 response code and disable body output
 262                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 263                 ini_set('zlib.output_compression', 0);
 264                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 265                 $this->sendCacheControl();
 266                 $this->disable();
 267
 268                 // Don't output a compressed blob when using ob_gzhandler;
 269                 // it's technically against HTTP spec and seems to confuse
 270                 // Firefox when the response gets split over two packets.
 271                 wfClearOutputBuffers();
 272
 273                 return true;
 274         }
 275
 276         function setPageTitleActionText( $text ) {
 277                 $this->mPageTitleActionText = $text;
 278         }
 279
 280         function getPageTitleActionText () {
 281                 if ( isset( $this->mPageTitleActionText ) ) {
 282                         return $this->mPageTitleActionText;
 283                 }
 284         }
 285
 286         /**
 287          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 288          *
 289          * @param $policy string The literal string to output as the contents of
 290          *   the meta tag.  Will be parsed according to the spec and output in
 291          *   standardized form.
 292          * @return null
 293          */
 294         public function setRobotPolicy( $policy ) {
 295                 $policy = Article::formatRobotPolicy( $policy );
 296
 297                 if( isset( $policy['index'] ) ){
 298                         $this->setIndexPolicy( $policy['index'] );
 299                 }
 300                 if( isset( $policy['follow'] ) ){
 301                         $this->setFollowPolicy( $policy['follow'] );
 302                 }
 303         }
 304
 305         /**
 306          * Set the index policy for the page, but leave the follow policy un-
 307          * touched.
 308          *
 309          * @param $policy string Either 'index' or 'noindex'.
 310          * @return null
 311          */
 312         public function setIndexPolicy( $policy ) {
 313                 $policy = trim( $policy );
 314                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 315                         $this->mIndexPolicy = $policy;
 316                 }
 317         }
 318
 319         /**
 320          * Set the follow policy for the page, but leave the index policy un-
 321          * touched.
 322          *
 323          * @param $policy string Either 'follow' or 'nofollow'.
 324          * @return null
 325          */
 326         public function setFollowPolicy( $policy ) {
 327                 $policy = trim( $policy );
 328                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 329                         $this->mFollowPolicy = $policy;
 330                 }
 331         }
 332
 333         /**
 334          * "HTML title" means the contents of <title>. It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 335          */
 336         public function setHTMLTitle( $name ) {
 337                 $this->mHTMLtitle = $name;
 338         }
 339
 340         /**
 341          * "Page title" means the contents of <h1>. It is stored as a valid HTML fragment.
 342          * This function allows good tags like <sup> in the <h1> tag, but not bad tags like <script>.
 343          * This function automatically sets <title> to the same content as <h1> but with all tags removed.
 344          * Bad tags that were escaped in <h1> will still be escaped in <title>, and good tags like <i> will be dropped entirely.
 345          */
 346         public function setPageTitle( $name ) {
 347                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 348                 # but leave "<i>foobar</i>" alone
 349                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 350                 $this->mPagetitle = $nameWithTags;
 351
 352                 $taction =  $this->getPageTitleActionText();
 353                 if( !empty( $taction ) ) {
 354                         $name .= ' - '.$taction;
 355                 }
 356
 357                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 358                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 359         }
 360
 361         public function setTitle( $t ) {
 362                 $this->mTitle = $t;
 363         }
 364
 365         public function getTitle() {
 366                 if ( $this->mTitle instanceof Title ) {
 367                         return $this->mTitle;
 368                 }
 369                 else {
 370                         wfDebug( __METHOD__ . ' called and $mTitle is null. Return $wgTitle for sanity' );
 371                         global $wgTitle;
 372                         return $wgTitle;
 373                 }
 374         }
 375
 376         public function getHTMLTitle() { return $this->mHTMLtitle; }
 377         public function getPageTitle() { return $this->mPagetitle; }
 378         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 379         public function appendSubtitle( $str ) { $this->mSubtitle .= /*$this->parse(*/$str/*)*/; } // @bug 2514
 380         public function getSubtitle() { return $this->mSubtitle; }
 381         public function isArticle() { return $this->mIsarticle; }
 382         public function setPrintable() { $this->mPrintable = true; }
 383         public function isPrintable() { return $this->mPrintable; }
 384         public function disable() { $this->mDoNothing = true; }
 385         public function isDisabled() { return $this->mDoNothing; }
 386
 387         /**
 388          * Add or remove feed links in the page header
 389          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 390          * for the new version
 391          * @see addFeedLink()
 392          *
 393          * @param $show Boolean: true: add default feeds, false: remove all feeds
 394          */
 395         public function setSyndicated( $show = true ) {
 396                 if ( $show ) {
 397                         $this->setFeedAppendQuery( false );
 398                 } else {
 399                         $this->mFeedLinks = array();
 400                 }
 401         }
 402
 403         /**
 404          * Add default feeds to the page header
 405          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 406          * for the new version
 407          * @see addFeedLink()
 408          *
 409          * @param $val String: query to append to feed links or false to output
 410          *        default links
 411          */
 412         public function setFeedAppendQuery( $val ) {
 413                 global $wgAdvertisedFeedTypes;
 414
 415                 $this->mFeedLinks = array();
 416
 417                 foreach ( $wgAdvertisedFeedTypes as $type ) {
 418                         $query = "feed=$type";
 419                         if ( is_string( $val ) ) {
 420                                 $query .= '&' . $val;
 421                         }
 422                         $this->mFeedLinks[$type] = $this->getTitle()->getLocalURL( $query );
 423                 }
 424         }
 425
 426         /**
 427          * Add a feed link to the page header
 428          *
 429          * @param $format String: feed type, should be a key of $wgFeedClasses
 430          * @param $href String: URL
 431          */
 432         public function addFeedLink( $format, $href ) {
 433                 $this->mFeedLinks[$format] = $href;
 434         }
 435
 436         /**
 437          * Return the number of feed links that will be added to the page header
 438          *
 439          * @return Boolean
 440          */
 441         public function isSyndicated() { return count($this->mFeedLinks); }
 442
 443         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 444
 445         public function setArticleRelated( $v ) {
 446                 $this->mIsArticleRelated = $v;
 447                 if ( !$v ) {
 448                         $this->mIsarticle = false;
 449                 }
 450         }
 451         public function setArticleFlag( $v ) {
 452                 $this->mIsarticle = $v;
 453                 if ( $v ) {
 454                         $this->mIsArticleRelated = $v;
 455                 }
 456         }
 457
 458         public function isArticleRelated() { return $this->mIsArticleRelated; }
 459
 460         public function getLanguageLinks() { return $this->mLanguageLinks; }
 461         public function addLanguageLinks($newLinkArray) {
 462                 $this->mLanguageLinks += $newLinkArray;
 463         }
 464         public function setLanguageLinks($newLinkArray) {
 465                 $this->mLanguageLinks = $newLinkArray;
 466         }
 467
 468         public function getCategoryLinks() {
 469                 return $this->mCategoryLinks;
 470         }
 471
 472         public function getCategories() {
 473                 return $this->mCategories;
 474         }
 475
 476         /**
 477          * Add an array of categories, with names in the keys
 478          */
 479         public function addCategoryLinks( $categories ) {
 480                 global $wgUser, $wgContLang;
 481
 482                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 483                         return;
 484                 }
 485
 486                 # Add the links to a LinkBatch
 487                 $arr = array( NS_CATEGORY => $categories );
 488                 $lb = new LinkBatch;
 489                 $lb->setArray( $arr );
 490
 491                 # Fetch existence plus the hiddencat property
 492                 $dbr = wfGetDB( DB_SLAVE );
 493                 $pageTable = $dbr->tableName( 'page' );
 494                 $where = $lb->constructSet( 'page', $dbr );
 495                 $propsTable = $dbr->tableName( 'page_props' );
 496                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 497                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 498                 $res = $dbr->query( $sql, __METHOD__ );
 499
 500                 # Add the results to the link cache
 501                 $lb->addResultToCache( LinkCache::singleton(), $res );
 502
 503                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 504                 $categories = array_combine( array_keys( $categories ),
 505                         array_fill( 0, count( $categories ), 'normal' ) );
 506
 507                 # Mark hidden categories
 508                 foreach ( $res as $row ) {
 509                         if ( isset( $row->pp_value ) ) {
 510                                 $categories[$row->page_title] = 'hidden';
 511                         }
 512                 }
 513
 514                 # Add the remaining categories to the skin
 515                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 516                         $sk = $wgUser->getSkin();
 517                         foreach ( $categories as $category => $type ) {
 518                                 $origcategory = $category;
 519                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 520                                 $wgContLang->findVariantLink( $category, $title, true );
 521                                 if ( $category != $origcategory )
 522                                         if ( array_key_exists( $category, $categories ) )
 523                                                 continue;
 524                                 $text = $wgContLang->convertHtml( $title->getText() );
 525                                 $this->mCategories[] = $title->getText();
 526                                 $this->mCategoryLinks[$type][] = $sk->link( $title, $text );
 527                         }
 528                 }
 529         }
 530
 531         public function setCategoryLinks($categories) {
 532                 $this->mCategoryLinks = array();
 533                 $this->addCategoryLinks($categories);
 534         }
 535
 536         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 537         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 538
 539         public function disallowUserJs() { $this->mAllowUserJs = false; }
 540         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 541
 542         public function prependHTML( $text ) { $this->mBodytext = $text . $this->mBodytext; }
 543         public function addHTML( $text ) { $this->mBodytext .= $text; }
 544         public function clearHTML() { $this->mBodytext = ''; }
 545         public function getHTML() { return $this->mBodytext; }
 546         public function debug( $text ) { $this->mDebugtext .= $text; }
 547
 548         /* @deprecated */
 549         public function setParserOptions( $options ) {
 550                 wfDeprecated( __METHOD__ );
 551                 return $this->parserOptions( $options );
 552         }
 553
 554         public function parserOptions( $options = null ) {
 555                 if ( !$this->mParserOptions ) {
 556                         $this->mParserOptions = new ParserOptions;
 557                 }
 558                 return wfSetVar( $this->mParserOptions, $options );
 559         }
 560
 561         /**
 562          * Set the revision ID which will be seen by the wiki text parser
 563          * for things such as embedded {{REVISIONID}} variable use.
 564          * @param mixed $revid an integer, or NULL
 565          * @return mixed previous value
 566          */
 567         public function setRevisionId( $revid ) {
 568                 $val = is_null( $revid ) ? null : intval( $revid );
 569                 return wfSetVar( $this->mRevisionId, $val );
 570         }
 571
 572         public function getRevisionId() {
 573                 return $this->mRevisionId;
 574         }
 575
 576         /**
 577          * Convert wikitext to HTML and add it to the buffer
 578          * Default assumes that the current page title will
 579          * be used.
 580          *
 581          * @param string $text
 582          * @param bool   $linestart
 583          */
 584         public function addWikiText( $text, $linestart = true ) {
 585                 $title = $this->getTitle(); // Work arround E_STRICT
 586                 $this->addWikiTextTitle( $text, $title, $linestart );
 587         }
 588
 589         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 590                 $this->addWikiTextTitle($text, $title, $linestart);
 591         }
 592
 593         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 594                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 595         }
 596
 597         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 598                 global $wgParser;
 599
 600                 wfProfileIn( __METHOD__ );
 601
 602                 wfIncrStats( 'pcache_not_possible' );
 603
 604                 $popts = $this->parserOptions();
 605                 $oldTidy = $popts->setTidy( $tidy );
 606
 607                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 608                         $linestart, true, $this->mRevisionId );
 609
 610                 $popts->setTidy( $oldTidy );
 611
 612                 $this->addParserOutput( $parserOutput );
 613
 614                 wfProfileOut( __METHOD__ );
 615         }
 616
 617         /**
 618          * @todo document
 619          * @param ParserOutput object &$parserOutput
 620          */
 621         public function addParserOutputNoText( &$parserOutput ) {
 622                 global $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 623
 624                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 625                 $this->addCategoryLinks( $parserOutput->getCategories() );
 626                 $this->mNewSectionLink = $parserOutput->getNewSection();
 627                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
 628
 629                 $this->mParseWarnings = $parserOutput->getWarnings();
 630                 if ( $parserOutput->getCacheTime() == -1 ) {
 631                         $this->enableClientCache( false );
 632                 }
 633                 $this->mNoGallery = $parserOutput->getNoGallery();
 634                 $this->mHeadItems = array_merge( $this->mHeadItems, $parserOutput->getHeadItems() );
 635                 // Versioning...
 636                 foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
 637                         if ( isset( $this->mTemplateIds[$ns] ) ) {
 638                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
 639                         } else {
 640                                 $this->mTemplateIds[$ns] = $dbks;
 641                         }
 642                 }
 643                 // Page title
 644                 $title = $parserOutput->getTitleText();
 645                 if ( $title != '' ) {
 646                         $this->setPageTitle( $title );
 647                 }
 648
 649                 // Hooks registered in the object
 650                 global $wgParserOutputHooks;
 651                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 652                         list( $hookName, $data ) = $hookInfo;
 653                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 654                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 655                         }
 656                 }
 657
 658                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 659         }
 660
 661         /**
 662          * @todo document
 663          * @param ParserOutput &$parserOutput
 664          */
 665         function addParserOutput( &$parserOutput ) {
 666                 $this->addParserOutputNoText( $parserOutput );
 667                 $text = $parserOutput->getText();
 668                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 669                 $this->addHTML( $text );
 670         }
 671
 672         /**
 673          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 674          * Saves the text into the parser cache if possible.
 675          *
 676          * @param string  $text
 677          * @param Article $article
 678          * @param bool    $cache
 679          * @deprecated Use Article::outputWikitext
 680          */
 681         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 682                 global $wgParser;
 683
 684                 wfDeprecated( __METHOD__ );
 685
 686                 $popts = $this->parserOptions();
 687                 $popts->setTidy(true);
 688                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 689                         $popts, true, true, $this->mRevisionId );
 690                 $popts->setTidy(false);
 691                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 692                         $parserCache = ParserCache::singleton();
 693                         $parserCache->save( $parserOutput, $article, $popts);
 694                 }
 695
 696                 $this->addParserOutput( $parserOutput );
 697         }
 698
 699         /**
 700          * @deprecated use addWikiTextTidy()
 701          */
 702         public function addSecondaryWikiText( $text, $linestart = true ) {
 703                 wfDeprecated( __METHOD__ );
 704                 $this->addWikiTextTitleTidy($text, $this->getTitle(), $linestart);
 705         }
 706
 707         /**
 708          * Add wikitext with tidy enabled
 709          */
 710         public function addWikiTextTidy(  $text, $linestart = true ) {
 711                 $title = $this->getTitle();
 712                 $this->addWikiTextTitleTidy($text, $title, $linestart);
 713         }
 714
 715
 716         /**
 717          * Add the output of a QuickTemplate to the output buffer
 718          *
 719          * @param QuickTemplate $template
 720          */
 721         public function addTemplate( &$template ) {
 722                 ob_start();
 723                 $template->execute();
 724                 $this->addHTML( ob_get_contents() );
 725                 ob_end_clean();
 726         }
 727
 728         /**
 729          * Parse wikitext and return the HTML.
 730          *
 731          * @param string $text
 732          * @param bool   $linestart Is this the start of a line?
 733          * @param bool   $interface ??
 734          */
 735         public function parse( $text, $linestart = true, $interface = false ) {
 736                 global $wgParser;
 737                 if( is_null( $this->getTitle() ) ) {
 738                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
 739                 }
 740                 $popts = $this->parserOptions();
 741                 if ( $interface) { $popts->setInterfaceMessage(true); }
 742                 $parserOutput = $wgParser->parse( $text, $this->getTitle(), $popts,
 743                         $linestart, true, $this->mRevisionId );
 744                 if ( $interface) { $popts->setInterfaceMessage(false); }
 745                 return $parserOutput->getText();
 746         }
 747
 748         /** Parse wikitext, strip paragraphs, and return the HTML. */
 749         public function parseInline( $text, $linestart = true, $interface = false ) {
 750                 $parsed = $this->parse( $text, $linestart, $interface );
 751
 752                 $m = array();
 753                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
 754                         $parsed = $m[1];
 755                 }
 756
 757                 return $parsed;
 758         }
 759
 760         /**
 761          * @param Article $article
 762          * @param User    $user
 763          *
 764          * @deprecated
 765          *
 766          * @return bool True if successful, else false.
 767          */
 768         public function tryParserCache( &$article ) {
 769                 wfDeprecated( __METHOD__ );
 770                 $parserOutput = ParserCache::singleton()->get( $article, $article->getParserOptions() );
 771
 772                 if ($parserOutput !== false) {
 773                         $this->addParserOutput( $parserOutput );
 774                         return true;
 775                 } else {
 776                         return false;
 777                 }
 778         }
 779
 780         /**
 781          * @param int $maxage Maximum cache time on the Squid, in seconds.
 782          */
 783         public function setSquidMaxage( $maxage ) {
 784                 $this->mSquidMaxage = $maxage;
 785         }
 786
 787         /**
 788          * Use enableClientCache(false) to force it to send nocache headers
 789          * @param $state ??
 790          */
 791         public function enableClientCache( $state ) {
 792                 return wfSetVar( $this->mEnableClientCache, $state );
 793         }
 794
 795         function getCacheVaryCookies() {
 796                 global $wgCookiePrefix, $wgCacheVaryCookies;
 797                 static $cookies;
 798                 if ( $cookies === null ) {
 799                         $cookies = array_merge(
 800                                 array(
 801                                         "{$wgCookiePrefix}Token",
 802                                         "{$wgCookiePrefix}LoggedOut",
 803                                         session_name()
 804                                 ),
 805                                 $wgCacheVaryCookies
 806                         );
 807                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 808                 }
 809                 return $cookies;
 810         }
 811
 812         function uncacheableBecauseRequestVars() {
 813                 global $wgRequest;
 814                 return  $wgRequest->getText('useskin', false) === false
 815                         && $wgRequest->getText('uselang', false) === false;
 816         }
 817
 818         /**
 819          * Check if the request has a cache-varying cookie header
 820          * If it does, it's very important that we don't allow public caching
 821          */
 822         function haveCacheVaryCookies() {
 823                 global $wgRequest;
 824                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 825                 if ( $cookieHeader === false ) {
 826                         return false;
 827                 }
 828                 $cvCookies = $this->getCacheVaryCookies();
 829                 foreach ( $cvCookies as $cookieName ) {
 830                         # Check for a simple string match, like the way squid does it
 831                         if ( strpos( $cookieHeader, $cookieName ) ) {
 832                                 wfDebug( __METHOD__.": found $cookieName\n" );
 833                                 return true;
 834                         }
 835                 }
 836                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 837                 return false;
 838         }
 839
 840         public function addVaryHeader( $header, $option = null ) {
 841                 if ( !array_key_exists( $header, $this->mVaryHeader ) ) {
 842                         $this->mVaryHeader[$header] = $option;
 843                 }
 844                 elseif( is_array( $option ) ) {
 845                         if( is_array( $this->mVaryHeader[$header] ) ) {
 846                                 $this->mVaryHeader[$header] = array_merge( $this->mVaryHeader[$header], $option );
 847                         }
 848                         else {
 849                                 $this->mVaryHeader[$header] = $option;
 850                         }
 851                 }
 852                 $this->mVaryHeader[$header] = array_unique( $this->mVaryHeader[$header] );
 853         }
 854
 855         /** Get a complete X-Vary-Options header */
 856         public function getXVO() {
 857                 $cvCookies = $this->getCacheVaryCookies();
 858
 859                 $cookiesOption = array();
 860                 foreach ( $cvCookies as $cookieName ) {
 861                         $cookiesOption[] = 'string-contains=' . $cookieName;
 862                 }
 863                 $this->addVaryHeader( 'Cookie', $cookiesOption );
 864
 865                 $headers = array();
 866                 foreach( $this->mVaryHeader as $header => $option ) {
 867                         $newheader = $header;
 868                         if( is_array( $option ) )
 869                                 $newheader .= ';' . implode( ';', $option );
 870                         $headers[] = $newheader;
 871                 }
 872                 $xvo = 'X-Vary-Options: ' . implode( ',', $headers );
 873
 874                 return $xvo;
 875         }
 876
 877         /** bug 21672: Add Accept-Language to Vary and XVO headers
 878                 if there's no 'variant' parameter existed in GET.
 879
 880                 For example:
 881                  /w/index.php?title=Main_page should always be served; but
 882                  /w/index.php?title=Main_page&variant=zh-cn should never be served.
 883
 884                 patched by Liangent and Philip */
 885         function addAcceptLanguage() {
 886                 global $wgRequest, $wgContLang;
 887                 if( !$wgRequest->getCheck('variant') && $wgContLang->hasVariants() ) {
 888                         $variants = $wgContLang->getVariants();
 889                         $aloption = array();
 890                         foreach ( $variants as $variant ) {
 891                                 if( $variant === $wgContLang->getCode() )
 892                                         continue;
 893                                 else
 894                                         $aloption[] = "string-contains=$variant";
 895                         }
 896                         $this->addVaryHeader( 'Accept-Language', $aloption );
 897                 }
 898         }
 899
 900         public function sendCacheControl() {
 901                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest, $wgUseXVO;
 902
 903                 $response = $wgRequest->response();
 904                 if ($wgUseETag && $this->mETag)
 905                         $response->header("ETag: $this->mETag");
 906
 907                 $this->addAcceptLanguage();
 908
 909                 # don't serve compressed data to clients who can't handle it
 910                 # maintain different caches for logged-in users and non-logged in ones
 911                 $response->header( 'Vary: ' . join( ', ', array_keys( $this->mVaryHeader ) ) );
 912
 913                 if ( $wgUseXVO ) {
 914                         # Add an X-Vary-Options header for Squid with Wikimedia patches
 915                         $response->header( $this->getXVO() );
 916                 }
 917
 918                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
 919                         if( $wgUseSquid && session_id() == '' &&
 920                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
 921                         {
 922                                 if ( $wgUseESI ) {
 923                                         # We'll purge the proxy cache explicitly, but require end user agents
 924                                         # to revalidate against the proxy on each visit.
 925                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 926                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
 927                                         # start with a shorter timeout for initial testing
 928                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 929                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 930                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 931                                 } else {
 932                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 933                                         # to revalidate against the proxy on each visit.
 934                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 935                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 936                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
 937                                         # start with a shorter timeout for initial testing
 938                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 939                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 940                                 }
 941                         } else {
 942                                 # We do want clients to cache if they can, but they *must* check for updates
 943                                 # on revisiting the page.
 944                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
 945                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 946                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
 947                         }
 948                         if($this->mLastModified) {
 949                                 $response->header( "Last-Modified: {$this->mLastModified}" );
 950                         }
 951                 } else {
 952                         wfDebug( __METHOD__ . ": no caching **\n", false );
 953
 954                         # In general, the absence of a last modified header should be enough to prevent
 955                         # the client from using its cache. We send a few other things just to make sure.
 956                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 957                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 958                         $response->header( 'Pragma: no-cache' );
 959                 }
 960                 wfRunHooks('CacheHeadersAfterSet', array( $this ) );
 961         }
 962
 963         /**
 964          * Get the message associed with the HTTP response code $code
 965          *
 966          * @param $code Integer: status code
 967          * @return String or null: message or null if $code is not in the list of
 968          *         messages
 969          */
 970         public static function getStatusMessage( $code ) {
 971                 static $statusMessage = array(
 972                         100 => 'Continue',
 973                         101 => 'Switching Protocols',
 974                         102 => 'Processing',
 975                         200 => 'OK',
 976                         201 => 'Created',
 977                         202 => 'Accepted',
 978                         203 => 'Non-Authoritative Information',
 979                         204 => 'No Content',
 980                         205 => 'Reset Content',
 981                         206 => 'Partial Content',
 982                         207 => 'Multi-Status',
 983                         300 => 'Multiple Choices',
 984                         301 => 'Moved Permanently',
 985                         302 => 'Found',
 986                         303 => 'See Other',
 987                         304 => 'Not Modified',
 988                         305 => 'Use Proxy',
 989                         307 => 'Temporary Redirect',
 990                         400 => 'Bad Request',
 991                         401 => 'Unauthorized',
 992                         402 => 'Payment Required',
 993                         403 => 'Forbidden',
 994                         404 => 'Not Found',
 995                         405 => 'Method Not Allowed',
 996                         406 => 'Not Acceptable',
 997                         407 => 'Proxy Authentication Required',
 998                         408 => 'Request Timeout',
 999                         409 => 'Conflict',
1000                         410 => 'Gone',
1001                         411 => 'Length Required',
1002                         412 => 'Precondition Failed',
1003                         413 => 'Request Entity Too Large',
1004                         414 => 'Request-URI Too Large',
1005                         415 => 'Unsupported Media Type',
1006                         416 => 'Request Range Not Satisfiable',
1007                         417 => 'Expectation Failed',
1008                         422 => 'Unprocessable Entity',
1009                         423 => 'Locked',
1010                         424 => 'Failed Dependency',
1011                         500 => 'Internal Server Error',
1012                         501 => 'Not Implemented',
1013                         502 => 'Bad Gateway',
1014                         503 => 'Service Unavailable',
1015                         504 => 'Gateway Timeout',
1016                         505 => 'HTTP Version Not Supported',
1017                         507 => 'Insufficient Storage'
1018                 );
1019                 return isset( $statusMessage[$code] ) ? $statusMessage[$code] : null;
1020         }
1021
1022         /**
1023          * Finally, all the text has been munged and accumulated into
1024          * the object, let's actually output it:
1025          */
1026         public function output() {
1027                 global $wgUser, $wgOutputEncoding, $wgRequest;
1028                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
1029                 global $wgUseAjax, $wgAjaxWatch;
1030                 global $wgEnableMWSuggest, $wgUniversalEditButton;
1031                 global $wgArticle;
1032
1033                 if( $this->mDoNothing ){
1034                         return;
1035                 }
1036                 wfProfileIn( __METHOD__ );
1037                 if ( $this->mRedirect != '' ) {
1038                         # Standards require redirect URLs to be absolute
1039                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
1040                         if( $this->mRedirectCode == '301' || $this->mRedirectCode == '303' ) {
1041                                 if( !$wgDebugRedirects ) {
1042                                         $message = self::getStatusMessage( $this->mRedirectCode );
1043                                         $wgRequest->response()->header( "HTTP/1.1 {$this->mRedirectCode} $message" );
1044                                 }
1045                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
1046                         }
1047                         $this->sendCacheControl();
1048
1049                         $wgRequest->response()->header( "Content-Type: text/html; charset=utf-8" );
1050                         if( $wgDebugRedirects ) {
1051                                 $url = htmlspecialchars( $this->mRedirect );
1052                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
1053                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
1054                                 print "</body>\n</html>\n";
1055                         } else {
1056                                 $wgRequest->response()->header( 'Location: ' . $this->mRedirect );
1057                         }
1058                         wfProfileOut( __METHOD__ );
1059                         return;
1060                 } elseif ( $this->mStatusCode ) {
1061                         $message = self::getStatusMessage( $this->mStatusCode );
1062                         if ( $message )
1063                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $message );
1064                 }
1065
1066                 $sk = $wgUser->getSkin();
1067
1068                 if ( $wgUseAjax ) {
1069                         $this->addScriptFile( 'ajax.js' );
1070
1071                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
1072
1073                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
1074                                 $this->addScriptFile( 'ajaxwatch.js' );
1075                         }
1076
1077                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
1078                                 $this->addScriptFile( 'mwsuggest.js' );
1079                         }
1080                 }
1081
1082                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
1083                         $this->addScriptFile( 'rightclickedit.js' );
1084                 }
1085
1086                 if( $wgUniversalEditButton ) {
1087                         if( isset( $wgArticle ) && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
1088                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
1089                                 // Original UniversalEditButton
1090                                 $msg = wfMsg('edit');
1091                                 $this->addLink( array(
1092                                         'rel' => 'alternate',
1093                                         'type' => 'application/x-wiki',
1094                                         'title' => $msg,
1095                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1096                                 ) );
1097                                 // Alternate edit link
1098                                 $this->addLink( array(
1099                                         'rel' => 'edit',
1100                                         'title' => $msg,
1101                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1102                                 ) );
1103                         }
1104                 }
1105
1106                 # Buffer output; final headers may depend on later processing
1107                 ob_start();
1108
1109                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1110                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
1111
1112                 if ($this->mArticleBodyOnly) {
1113                         $this->out($this->mBodytext);
1114                 } else {
1115                         // Hook that allows last minute changes to the output page, e.g.
1116                         // adding of CSS or Javascript by extensions.
1117                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1118
1119                         wfProfileIn( 'Output-skin' );
1120                         $sk->outputPage( $this );
1121                         wfProfileOut( 'Output-skin' );
1122                 }
1123
1124                 $this->sendCacheControl();
1125                 ob_end_flush();
1126                 wfProfileOut( __METHOD__ );
1127         }
1128
1129         /**
1130          * Actually output something with print(). Performs an iconv to the
1131          * output encoding, if needed.
1132          * @param string $ins The string to output
1133          */
1134         public function out( $ins ) {
1135                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1136                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1137                         $outs = $ins;
1138                 } else {
1139                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1140                         if ( false === $outs ) { $outs = $ins; }
1141                 }
1142                 print $outs;
1143         }
1144
1145         /**
1146          * @todo document
1147          */
1148         public static function setEncodings() {
1149                 global $wgInputEncoding, $wgOutputEncoding;
1150                 global $wgContLang;
1151
1152                 $wgInputEncoding = strtolower( $wgInputEncoding );
1153
1154                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
1155                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
1156                         return;
1157                 }
1158                 $wgOutputEncoding = $wgInputEncoding;
1159         }
1160
1161         /**
1162          * Deprecated, use wfReportTime() instead.
1163          * @return string
1164          * @deprecated
1165          */
1166         public function reportTime() {
1167                 wfDeprecated( __METHOD__ );
1168                 $time = wfReportTime();
1169                 return $time;
1170         }
1171
1172         /**
1173          * Produce a "user is blocked" page.
1174          *
1175          * @param bool $return Whether to have a "return to $wgTitle" message or not.
1176          * @return nothing
1177          */
1178         function blockedPage( $return = true ) {
1179                 global $wgUser, $wgContLang, $wgLang;
1180
1181                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1182                 $this->setRobotPolicy( 'noindex,nofollow' );
1183                 $this->setArticleRelated( false );
1184
1185                 $name = User::whoIs( $wgUser->blockedBy() );
1186                 $reason = $wgUser->blockedFor();
1187                 if( $reason == '' ) {
1188                         $reason = wfMsg( 'blockednoreason' );
1189                 }
1190                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
1191                 $ip = wfGetIP();
1192
1193                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1194
1195                 $blockid = $wgUser->mBlock->mId;
1196
1197                 $blockExpiry = $wgUser->mBlock->mExpiry;
1198                 if ( $blockExpiry == 'infinity' ) {
1199                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
1200                         // Search for localization in 'ipboptions'
1201                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
1202                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1203                                 if ( strpos( $option, ":" ) === false )
1204                                         continue;
1205                                 list( $show, $value ) = explode( ":", $option );
1206                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1207                                         $blockExpiry = $show;
1208                                         break;
1209                                 }
1210                         }
1211                 } else {
1212                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
1213                 }
1214
1215                 if ( $wgUser->mBlock->mAuto ) {
1216                         $msg = 'autoblockedtext';
1217                 } else {
1218                         $msg = 'blockedtext';
1219                 }
1220
1221                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1222                  * This could be a username, an ip range, or a single ip. */
1223                 $intended = $wgUser->mBlock->mAddress;
1224
1225                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
1226
1227                 # Don't auto-return to special pages
1228                 if( $return ) {
1229                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1230                         $this->returnToMain( null, $return );
1231                 }
1232         }
1233
1234         /**
1235          * Output a standard error page
1236          *
1237          * @param string $title Message key for page title
1238          * @param string $msg Message key for page text
1239          * @param array $params Message parameters
1240          */
1241         public function showErrorPage( $title, $msg, $params = array() ) {
1242                 if ( $this->getTitle() ) {
1243                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1244                 }
1245                 $this->setPageTitle( wfMsg( $title ) );
1246                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1247                 $this->setRobotPolicy( 'noindex,nofollow' );
1248                 $this->setArticleRelated( false );
1249                 $this->enableClientCache( false );
1250                 $this->mRedirect = '';
1251                 $this->mBodytext = '';
1252
1253                 array_unshift( $params, 'parse' );
1254                 array_unshift( $params, $msg );
1255                 $this->addHTML( call_user_func_array( 'wfMsgExt', $params ) );
1256
1257                 $this->returnToMain();
1258         }
1259
1260         /**
1261          * Output a standard permission error page
1262          *
1263          * @param array $errors Error message keys
1264          */
1265         public function showPermissionsErrorPage( $errors, $action = null )
1266         {
1267                 $this->mDebugtext .= 'Original title: ' .
1268                 $this->getTitle()->getPrefixedText() . "\n";
1269                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1270                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1271                 $this->setRobotPolicy( 'noindex,nofollow' );
1272                 $this->setArticleRelated( false );
1273                 $this->enableClientCache( false );
1274                 $this->mRedirect = '';
1275                 $this->mBodytext = '';
1276                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1277         }
1278
1279         /** @deprecated */
1280         public function errorpage( $title, $msg ) {
1281                 wfDeprecated( __METHOD__ );
1282                 throw new ErrorPageError( $title, $msg );
1283         }
1284
1285         /**
1286          * Display an error page indicating that a given version of MediaWiki is
1287          * required to use it
1288          *
1289          * @param mixed $version The version of MediaWiki needed to use the page
1290          */
1291         public function versionRequired( $version ) {
1292                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1293                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1294                 $this->setRobotPolicy( 'noindex,nofollow' );
1295                 $this->setArticleRelated( false );
1296                 $this->mBodytext = '';
1297
1298                 $this->addWikiMsg( 'versionrequiredtext', $version );
1299                 $this->returnToMain();
1300         }
1301
1302         /**
1303          * Display an error page noting that a given permission bit is required.
1304          *
1305          * @param string $permission key required
1306          */
1307         public function permissionRequired( $permission ) {
1308                 global $wgLang;
1309
1310                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1311                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1312                 $this->setRobotPolicy( 'noindex,nofollow' );
1313                 $this->setArticleRelated( false );
1314                 $this->mBodytext = '';
1315
1316                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1317                         User::getGroupsWithPermission( $permission ) );
1318                 if( $groups ) {
1319                         $this->addWikiMsg( 'badaccess-groups',
1320                                 $wgLang->commaList( $groups ),
1321                                 count( $groups) );
1322                 } else {
1323                         $this->addWikiMsg( 'badaccess-group0' );
1324                 }
1325                 $this->returnToMain();
1326         }
1327
1328         /**
1329          * Use permissionRequired.
1330          * @deprecated
1331          */
1332         public function sysopRequired() {
1333                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1334         }
1335
1336         /**
1337          * Use permissionRequired.
1338          * @deprecated
1339          */
1340         public function developerRequired() {
1341                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1342         }
1343
1344         /**
1345          * Produce the stock "please login to use the wiki" page
1346          */
1347         public function loginToUse() {
1348                 global $wgUser, $wgContLang;
1349
1350                 if( $wgUser->isLoggedIn() ) {
1351                         $this->permissionRequired( 'read' );
1352                         return;
1353                 }
1354
1355                 $skin = $wgUser->getSkin();
1356
1357                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1358                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1359                 $this->setRobotPolicy( 'noindex,nofollow' );
1360                 $this->setArticleFlag( false );
1361
1362                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1363                 $loginLink = $skin->link(
1364                         $loginTitle,
1365                         wfMsgHtml( 'loginreqlink' ),
1366                         array(),
1367                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
1368                         array( 'known', 'noclasses' )
1369                 );
1370                 $this->addHTML( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1371                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . "-->" );
1372
1373                 # Don't return to the main page if the user can't read it
1374                 # otherwise we'll end up in a pointless loop
1375                 $mainPage = Title::newMainPage();
1376                 if( $mainPage->userCanRead() )
1377                         $this->returnToMain( null, $mainPage );
1378         }
1379
1380         /** @deprecated */
1381         public function databaseError( $fname, $sql, $error, $errno ) {
1382                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1383         }
1384
1385         /**
1386          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1387          * @return string The wikitext error-messages, formatted into a list.
1388          */
1389         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1390                 if ($action == null) {
1391                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1392                 } else {
1393                         global $wgLang;
1394                         $action_desc = wfMsgNoTrans( "action-$action" );
1395                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1396                 }
1397
1398                 if (count( $errors ) > 1) {
1399                         $text .= '<ul class="permissions-errors">' . "\n";
1400
1401                         foreach( $errors as $error )
1402                         {
1403                                 $text .= '<li>';
1404                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1405                                 $text .= "</li>\n";
1406                         }
1407                         $text .= '</ul>';
1408                 } else {
1409                         $text .= "<div class=\"permissions-errors\">\n" . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . "\n</div>";
1410                 }
1411
1412                 return $text;
1413         }
1414
1415         /**
1416          * Display a page stating that the Wiki is in read-only mode,
1417          * and optionally show the source of the page that the user
1418          * was trying to edit.  Should only be called (for this
1419          * purpose) after wfReadOnly() has returned true.
1420          *
1421          * For historical reasons, this function is _also_ used to
1422          * show the error message when a user tries to edit a page
1423          * they are not allowed to edit.  (Unless it's because they're
1424          * blocked, then we show blockedPage() instead.)  In this
1425          * case, the second parameter should be set to true and a list
1426          * of reasons supplied as the third parameter.
1427          *
1428          * @todo Needs to be split into multiple functions.
1429          *
1430          * @param string $source    Source code to show (or null).
1431          * @param bool   $protected Is this a permissions error?
1432          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1433          */
1434         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1435                 global $wgUser;
1436                 $skin = $wgUser->getSkin();
1437
1438                 $this->setRobotPolicy( 'noindex,nofollow' );
1439                 $this->setArticleRelated( false );
1440
1441                 // If no reason is given, just supply a default "I can't let you do
1442                 // that, Dave" message.  Should only occur if called by legacy code.
1443                 if ( $protected && empty($reasons) ) {
1444                         $reasons[] = array( 'badaccess-group0' );
1445                 }
1446
1447                 if ( !empty($reasons) ) {
1448                         // Permissions error
1449                         if( $source ) {
1450                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1451                                 $this->setSubtitle(
1452                                         wfMsg(
1453                                                 'viewsourcefor',
1454                                                 $skin->link(
1455                                                         $this->getTitle(),
1456                                                         null,
1457                                                         array(),
1458                                                         array(),
1459                                                         array( 'known', 'noclasses' )
1460                                                 )
1461                                         )
1462                                 );
1463                         } else {
1464                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1465                         }
1466                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1467                 } else {
1468                         // Wiki is read only
1469                         $this->setPageTitle( wfMsg( 'readonly' ) );
1470                         $reason = wfReadOnlyReason();
1471                         $this->wrapWikiMsg( '<div class="mw-readonly-error">\n$1</div>', array( 'readonlytext', $reason ) );
1472                 }
1473
1474                 // Show source, if supplied
1475                 if( is_string( $source ) ) {
1476                         $this->addWikiMsg( 'viewsourcetext' );
1477
1478                         $params = array(
1479                                 'id'   => 'wpTextbox1',
1480                                 'name' => 'wpTextbox1',
1481                                 'cols' => $wgUser->getOption( 'cols' ),
1482                                 'rows' => $wgUser->getOption( 'rows' ),
1483                                 'readonly' => 'readonly'
1484                         );
1485                         $this->addHTML( Html::element( 'textarea', $params, $source ) );
1486
1487                         // Show templates used by this article
1488                         $skin = $wgUser->getSkin();
1489                         $article = new Article( $this->getTitle() );
1490                         $this->addHTML( "<div class='templatesUsed'>
1491 {$skin->formatTemplates( $article->getUsedTemplates() )}
1492 </div>
1493 " );
1494                 }
1495
1496                 # If the title doesn't exist, it's fairly pointless to print a return
1497                 # link to it.  After all, you just tried editing it and couldn't, so
1498                 # what's there to do there?
1499                 if( $this->getTitle()->exists() ) {
1500                         $this->returnToMain( null, $this->getTitle() );
1501                 }
1502         }
1503
1504         /** @deprecated */
1505         public function fatalError( $message ) {
1506                 wfDeprecated( __METHOD__ );
1507                 throw new FatalError( $message );
1508         }
1509
1510         /** @deprecated */
1511         public function unexpectedValueError( $name, $val ) {
1512                 wfDeprecated( __METHOD__ );
1513                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1514         }
1515
1516         /** @deprecated */
1517         public function fileCopyError( $old, $new ) {
1518                 wfDeprecated( __METHOD__ );
1519                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1520         }
1521
1522         /** @deprecated */
1523         public function fileRenameError( $old, $new ) {
1524                 wfDeprecated( __METHOD__ );
1525                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1526         }
1527
1528         /** @deprecated */
1529         public function fileDeleteError( $name ) {
1530                 wfDeprecated( __METHOD__ );
1531                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1532         }
1533
1534         /** @deprecated */
1535         public function fileNotFoundError( $name ) {
1536                 wfDeprecated( __METHOD__ );
1537                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1538         }
1539
1540         public function showFatalError( $message ) {
1541                 $this->setPageTitle( wfMsg( "internalerror" ) );
1542                 $this->setRobotPolicy( "noindex,nofollow" );
1543                 $this->setArticleRelated( false );
1544                 $this->enableClientCache( false );
1545                 $this->mRedirect = '';
1546                 $this->mBodytext = $message;
1547         }
1548
1549         public function showUnexpectedValueError( $name, $val ) {
1550                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1551         }
1552
1553         public function showFileCopyError( $old, $new ) {
1554                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1555         }
1556
1557         public function showFileRenameError( $old, $new ) {
1558                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1559         }
1560
1561         public function showFileDeleteError( $name ) {
1562                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1563         }
1564
1565         public function showFileNotFoundError( $name ) {
1566                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1567         }
1568
1569         /**
1570          * Add a "return to" link pointing to a specified title
1571          *
1572          * @param $title Title to link
1573          * @param $query String: query string
1574          */
1575         public function addReturnTo( $title, $query = array() ) {
1576                 global $wgUser;
1577                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullUrl() ) );
1578                 $link = wfMsgHtml( 'returnto', $wgUser->getSkin()->link(
1579                         $title, null, array(), $query ) );
1580                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
1581         }
1582
1583         /**
1584          * Add a "return to" link pointing to a specified title,
1585          * or the title indicated in the request, or else the main page
1586          *
1587          * @param $unused No longer used
1588          * @param $returnto Title or String to return to
1589          * @param $returntoquery String: query string for the return to link
1590          */
1591         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
1592                 global $wgRequest;
1593
1594                 if ( $returnto == null ) {
1595                         $returnto = $wgRequest->getText( 'returnto' );
1596                 }
1597
1598                 if ( $returntoquery == null ) {
1599                         $returntoquery = $wgRequest->getText( 'returntoquery' );
1600                 }
1601
1602                 if ( $returnto === '' ) {
1603                         $returnto = Title::newMainPage();
1604                 }
1605
1606                 if ( is_object( $returnto ) ) {
1607                         $titleObj = $returnto;
1608                 } else {
1609                         $titleObj = Title::newFromText( $returnto );
1610                 }
1611                 if ( !is_object( $titleObj ) ) {
1612                         $titleObj = Title::newMainPage();
1613                 }
1614
1615                 $this->addReturnTo( $titleObj, $returntoquery );
1616         }
1617
1618         /**
1619          * @return string The doctype, opening <html>, and head element.
1620          *
1621          * @param $sk Skin The given Skin
1622          */
1623         public function headElement( Skin $sk, $includeStyle = true ) {
1624                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1625                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces, $wgHtml5Version;
1626                 global $wgContLang, $wgUseTrackbacks, $wgStyleVersion, $wgHtml5, $wgWellFormedXml;
1627                 global $wgUser, $wgRequest, $wgLang;
1628
1629                 $this->addMeta( "http:Content-Type", "$wgMimeType; charset={$wgOutputEncoding}" );
1630                 if ( $sk->commonPrintStylesheet() ) {
1631                         $this->addStyle( 'common/wikiprintable.css', 'print' );
1632                 }
1633                 $sk->setupUserCss( $this );
1634
1635                 $ret = '';
1636
1637                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1638                         $ret .= "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
1639                 }
1640
1641                 if ( $this->getHTMLTitle() == '' ) {
1642                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1643                 }
1644
1645                 $dir = $wgContLang->getDir();
1646
1647                 if ( $wgHtml5 ) {
1648                         if ( $wgWellFormedXml ) {
1649                                 # Unknown elements and attributes are okay in XML, but unknown
1650                                 # named entities are well-formedness errors and will break XML
1651                                 # parsers.  Thus we need a doctype that gives us appropriate
1652                                 # entity definitions.  The HTML5 spec permits four legacy
1653                                 # doctypes as obsolete but conforming, so let's pick one of
1654                                 # those, although it makes our pages look like XHTML1 Strict.
1655                                 # Isn't compatibility great?
1656                                 $ret .= "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n";
1657                         } else {
1658                                 # Much saner.
1659                                 $ret .= "<!doctype html>\n";
1660                         }
1661                         $ret .= "<html lang=\"$wgContLanguageCode\" dir=\"$dir\" ";
1662                         if ( $wgHtml5Version ) $ret .= " version=\"$wgHtml5Version\" ";
1663                         $ret .= ">\n";
1664                 } else {
1665                         $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\" \"$wgDTD\">\n";
1666                         $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1667                         foreach($wgXhtmlNamespaces as $tag => $ns) {
1668                                 $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1669                         }
1670                         $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" dir=\"$dir\">\n";
1671                 }
1672
1673                 $ret .= "<head>\n";
1674                 $ret .= "<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1675                 $ret .= implode( "\n", array(
1676                         $this->getHeadLinks(),
1677                         $this->buildCssLinks(),
1678                         $this->getHeadScripts( $sk ),
1679                         $this->getHeadItems(),
1680                 ));
1681                 if( $sk->usercss ){
1682                         $ret .= Html::inlineStyle( $sk->usercss );
1683                 }
1684
1685                 if ($wgUseTrackbacks && $this->isArticleRelated())
1686                         $ret .= $this->getTitle()->trackbackRDF();
1687
1688                 $ret .= "</head>\n";
1689
1690                 $bodyAttrs = array();
1691
1692                 # Crazy edit-on-double-click stuff
1693                 $action = $wgRequest->getVal( 'action', 'view' );
1694
1695                 if ( $this->getTitle()->getNamespace() != NS_SPECIAL
1696                 && !in_array( $action, array( 'edit', 'submit' ) )
1697                 && $wgUser->getOption( 'editondblclick' ) ) {
1698                         $bodyAttrs['ondblclick'] = "document.location = '" . Xml::escapeJsString( $this->getTitle()->getEditURL() ) . "'";
1699                 }
1700
1701                 # Class bloat
1702                 $bodyAttrs['class'] = "mediawiki $dir";
1703
1704                 if ( $wgLang->capitalizeAllNouns() ) {
1705                         # A <body> class is probably not the best way to do this . . .
1706                         $bodyAttrs['class'] .= ' capitalize-all-nouns';
1707                 }
1708                 $bodyAttrs['class'] .= ' ns-' . $this->getTitle()->getNamespace();
1709                 if ( $this->getTitle()->getNamespace() == NS_SPECIAL ) {
1710                         $bodyAttrs['class'] .= ' ns-special';
1711                 } elseif ( $this->getTitle()->isTalkPage() ) {
1712                         $bodyAttrs['class'] .= ' ns-talk';
1713                 } else {
1714                         $bodyAttrs['class'] .= ' ns-subject';
1715                 }
1716                 $bodyAttrs['class'] .= ' ' . Sanitizer::escapeClass( 'page-' . $this->getTitle()->getPrefixedText() );
1717                 $bodyAttrs['class'] .= ' skin-' . Sanitizer::escapeClass( $wgUser->getSkin()->getSkinName() );
1718
1719                 $ret .= Html::openElement( 'body', $bodyAttrs ) . "\n";
1720
1721                 return $ret;
1722         }
1723
1724         /*
1725          * gets the global variables and mScripts
1726          *
1727          * also adds userjs to the end if enabled:
1728         */
1729         function getHeadScripts( Skin $sk ) {
1730                 global $wgUser, $wgRequest, $wgJsMimeType, $wgUseSiteJs;
1731                 global $wgStylePath, $wgStyleVersion;
1732
1733                 $scripts = Skin::makeGlobalVariablesScript( $sk->getSkinName() );
1734                 $scripts .= Html::linkedScript( "{$wgStylePath}/common/wikibits.js?$wgStyleVersion" );
1735
1736                 //add site JS if enabled:
1737                 if( $wgUseSiteJs ) {
1738                         $jsCache = $wgUser->isLoggedIn() ? '&smaxage=0' : '';
1739                         $this->addScriptFile(  Skin::makeUrl( '-',
1740                                         "action=raw$jsCache&gen=js&useskin=" .
1741                                         urlencode( $sk->getSkinName() )
1742                                         )
1743                                 );
1744                 }
1745
1746                 //add user js if enabled:
1747                 if( $this->isUserJsAllowed() && $wgUser->isLoggedIn() ) {
1748                         $action = $wgRequest->getVal( 'action', 'view' );
1749                         if( $this->mTitle && $this->mTitle->isJsSubpage() and $sk->userCanPreview( $action ) ) {
1750                                 # XXX: additional security check/prompt?
1751                                 $this->addInlineScript( $wgRequest->getText( 'wpTextbox1' ) );
1752                         } else {
1753                                 $userpage = $wgUser->getUserPage();
1754                                 $scriptpage = Title::makeTitleSafe(
1755                                         NS_USER,
1756                                         $userpage->getDBkey() . '/' . $sk->getSkinName() . '.js'
1757                                 );
1758                                 if ( $scriptpage && $scriptpage->exists() ) {
1759                                         $userjs = Skin::makeUrl( $scriptpage->getPrefixedText(), 'action=raw&ctype=' . $wgJsMimeType );
1760                                         $this->addScriptFile( $userjs );
1761                                 }
1762                         }
1763                 }
1764
1765                 $scripts .= "\n" . $this->mScripts;
1766                 return $scripts;
1767         }
1768
1769         protected function addDefaultMeta() {
1770                 global $wgVersion, $wgHtml5;
1771
1772                 static $called = false;
1773                 if ( $called ) {
1774                         # Don't run this twice
1775                         return;
1776                 }
1777                 $called = true;
1778
1779                 if ( !$wgHtml5 ) {
1780                         $this->addMeta( 'http:Content-Style-Type', 'text/css' ); //bug 15835
1781                 }
1782                 $this->addMeta( 'generator', "MediaWiki $wgVersion" );
1783
1784                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
1785                 if( $p !== 'index,follow' ) {
1786                         // http://www.robotstxt.org/wc/meta-user.html
1787                         // Only show if it's different from the default robots policy
1788                         $this->addMeta( 'robots', $p );
1789                 }
1790
1791                 if ( count( $this->mKeywords ) > 0 ) {
1792                         $strip = array(
1793                                 "/<.*?" . ">/" => '',
1794                                 "/_/" => ' '
1795                         );
1796                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
1797                 }
1798         }
1799
1800         /**
1801          * @return string HTML tag links to be put in the header.
1802          */
1803         public function getHeadLinks() {
1804                 global $wgRequest, $wgFeed;
1805
1806                 // Ideally this should happen earlier, somewhere. :P
1807                 $this->addDefaultMeta();
1808
1809                 $tags = array();
1810
1811                 foreach ( $this->mMetatags as $tag ) {
1812                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1813                                 $a = 'http-equiv';
1814                                 $tag[0] = substr( $tag[0], 5 );
1815                         } else {
1816                                 $a = 'name';
1817                         }
1818                         $tags[] = Html::element( 'meta',
1819                                 array(
1820                                         $a => $tag[0],
1821                                         'content' => $tag[1] ) );
1822                 }
1823                 foreach ( $this->mLinktags as $tag ) {
1824                         $tags[] = Html::element( 'link', $tag );
1825                 }
1826
1827                 if( $wgFeed ) {
1828                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1829                                 # Use the page name for the title (accessed through $wgTitle since
1830                                 # there's no other way).  In principle, this could lead to issues
1831                                 # with having the same name for different feeds corresponding to
1832                                 # the same page, but we can't avoid that at this low a level.
1833
1834                                 $tags[] = $this->feedLink(
1835                                         $format,
1836                                         $link,
1837                                         # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1838                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() ) );
1839                         }
1840
1841                         # Recent changes feed should appear on every page (except recentchanges,
1842                         # that would be redundant). Put it after the per-page feed to avoid
1843                         # changing existing behavior. It's still available, probably via a
1844                         # menu in your browser. Some sites might have a different feed they'd
1845                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
1846                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
1847                         # If so, use it instead.
1848
1849                         global $wgOverrideSiteFeed, $wgSitename, $wgAdvertisedFeedTypes;
1850                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1851
1852                         if ( $wgOverrideSiteFeed ) {
1853                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
1854                                         $tags[] = $this->feedLink (
1855                                                 $type,
1856                                                 htmlspecialchars( $feedUrl ),
1857                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
1858                                 }
1859                         } elseif ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
1860                                 foreach ( $wgAdvertisedFeedTypes as $format ) {
1861                                         $tags[] = $this->feedLink(
1862                                                 $format,
1863                                                 $rctitle->getLocalURL( "feed={$format}" ),
1864                                                 wfMsg( "site-{$format}-feed", $wgSitename ) ); # For grep: 'site-rss-feed', 'site-atom-feed'.
1865                                 }
1866                         }
1867                 }
1868
1869                 return implode( "\n", $tags );
1870         }
1871
1872         /**
1873          * Return URLs for each supported syndication format for this page.
1874          * @return array associating format keys with URLs
1875          */
1876         public function getSyndicationLinks() {
1877                 return $this->mFeedLinks;
1878         }
1879
1880         /**
1881          * Generate a <link rel/> for an RSS feed.
1882          */
1883         private function feedLink( $type, $url, $text ) {
1884                 return Html::element( 'link', array(
1885                         'rel' => 'alternate',
1886                         'type' => "application/$type+xml",
1887                         'title' => $text,
1888                         'href' => $url ) );
1889         }
1890
1891         /**
1892          * Add a local or specified stylesheet, with the given media options.
1893          * Meant primarily for internal use...
1894          *
1895          * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
1896          * @param $conditional -- for IE conditional comments, specifying an IE version
1897          * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
1898          */
1899         public function addStyle( $style, $media='', $condition='', $dir='' ) {
1900                 $options = array();
1901                 // Even though we expect the media type to be lowercase, but here we
1902                 // force it to lowercase to be safe.
1903                 if( $media )
1904                         $options['media'] = $media;
1905                 if( $condition )
1906                         $options['condition'] = $condition;
1907                 if( $dir )
1908                         $options['dir'] = $dir;
1909                 $this->styles[$style] = $options;
1910         }
1911
1912         /**
1913          * Adds inline CSS styles
1914          * @param $style_css Mixed: inline CSS
1915          */
1916         public function addInlineStyle( $style_css ){
1917                 $this->mScripts .= Html::inlineStyle( $style_css );
1918         }
1919
1920         /**
1921          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
1922          * These will be applied to various media & IE conditionals.
1923          */
1924         public function buildCssLinks() {
1925                 $links = array();
1926                 foreach( $this->styles as $file => $options ) {
1927                         $link = $this->styleLink( $file, $options );
1928                         if( $link )
1929                                 $links[] = $link;
1930                 }
1931
1932                 return implode( "\n", $links );
1933         }
1934
1935         protected function styleLink( $style, $options ) {
1936                 global $wgRequest;
1937
1938                 if( isset( $options['dir'] ) ) {
1939                         global $wgContLang;
1940                         $siteDir = $wgContLang->getDir();
1941                         if( $siteDir != $options['dir'] )
1942                                 return '';
1943                 }
1944
1945                 if( isset( $options['media'] ) ) {
1946                         $media = $this->transformCssMedia( $options['media'] );
1947                         if( is_null( $media ) ) {
1948                                 return '';
1949                         }
1950                 } else {
1951                         $media = 'all';
1952                 }
1953
1954                 if( substr( $style, 0, 1 ) == '/' ||
1955                         substr( $style, 0, 5 ) == 'http:' ||
1956                         substr( $style, 0, 6 ) == 'https:' ) {
1957                         $url = $style;
1958                 } else {
1959                         global $wgStylePath, $wgStyleVersion;
1960                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
1961                 }
1962
1963                 $link = Html::linkedStyle( $url, $media );
1964
1965                 if( isset( $options['condition'] ) ) {
1966                         $condition = htmlspecialchars( $options['condition'] );
1967                         $link = "<!--[if $condition]>$link<![endif]-->";
1968                 }
1969                 return $link;
1970         }
1971
1972         function transformCssMedia( $media ) {
1973                 global $wgRequest, $wgHandheldForIPhone;
1974
1975                 // Switch in on-screen display for media testing
1976                 $switches = array(
1977                         'printable' => 'print',
1978                         'handheld' => 'handheld',
1979                 );
1980                 foreach( $switches as $switch => $targetMedia ) {
1981                         if( $wgRequest->getBool( $switch ) ) {
1982                                 if( $media == $targetMedia ) {
1983                                         $media = '';
1984                                 } elseif( $media == 'screen' ) {
1985                                         return null;
1986                                 }
1987                         }
1988                 }
1989
1990                 // Expand longer media queries as iPhone doesn't grok 'handheld'
1991                 if( $wgHandheldForIPhone ) {
1992                         $mediaAliases = array(
1993                                 'screen' => 'screen and (min-device-width: 481px)',
1994                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
1995                         );
1996
1997                         if( isset( $mediaAliases[$media] ) ) {
1998                                 $media = $mediaAliases[$media];
1999                         }
2000                 }
2001
2002                 return $media;
2003         }
2004
2005         /**
2006          * Turn off regular page output and return an error reponse
2007          * for when rate limiting has triggered.
2008          */
2009         public function rateLimited() {
2010
2011                 $this->setPageTitle(wfMsg('actionthrottled'));
2012                 $this->setRobotPolicy( 'noindex,follow' );
2013                 $this->setArticleRelated( false );
2014                 $this->enableClientCache( false );
2015                 $this->mRedirect = '';
2016                 $this->clearHTML();
2017                 $this->setStatusCode(503);
2018                 $this->addWikiMsg( 'actionthrottledtext' );
2019
2020                 $this->returnToMain( null, $this->getTitle() );
2021         }
2022
2023         /**
2024          * Show an "add new section" link?
2025          *
2026          * @return bool
2027          */
2028         public function showNewSectionLink() {
2029                 return $this->mNewSectionLink;
2030         }
2031
2032         /**
2033         * Forcibly hide the new section link?
2034         *
2035         * @return bool
2036         */
2037         public function forceHideNewSectionLink() {
2038                 return $this->mHideNewSectionLink;
2039         }
2040
2041         /**
2042          * Show a warning about slave lag
2043          *
2044          * If the lag is higher than $wgSlaveLagCritical seconds,
2045          * then the warning is a bit more obvious. If the lag is
2046          * lower than $wgSlaveLagWarning, then no warning is shown.
2047          *
2048          * @param int $lag Slave lag
2049          */
2050         public function showLagWarning( $lag ) {
2051                 global $wgSlaveLagWarning, $wgSlaveLagCritical, $wgLang;
2052                 if( $lag >= $wgSlaveLagWarning ) {
2053                         $message = $lag < $wgSlaveLagCritical
2054                                 ? 'lag-warn-normal'
2055                                 : 'lag-warn-high';
2056                         $wrap = Html::rawElement( 'div', array( 'class' => "mw-{$message}" ), "\n$1\n" );
2057                         $this->wrapWikiMsg( "$wrap\n", array( $message, $wgLang->formatNum( $lag ) ) );
2058                 }
2059         }
2060
2061         /**
2062          * Add a wikitext-formatted message to the output.
2063          * This is equivalent to:
2064          *
2065          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
2066          */
2067         public function addWikiMsg( /*...*/ ) {
2068                 $args = func_get_args();
2069                 $name = array_shift( $args );
2070                 $this->addWikiMsgArray( $name, $args );
2071         }
2072
2073         /**
2074          * Add a wikitext-formatted message to the output.
2075          * Like addWikiMsg() except the parameters are taken as an array
2076          * instead of a variable argument list.
2077          *
2078          * $options is passed through to wfMsgExt(), see that function for details.
2079          */
2080         public function addWikiMsgArray( $name, $args, $options = array() ) {
2081                 $options[] = 'parse';
2082                 $text = wfMsgExt( $name, $options, $args );
2083                 $this->addHTML( $text );
2084         }
2085
2086         /**
2087          * This function takes a number of message/argument specifications, wraps them in
2088          * some overall structure, and then parses the result and adds it to the output.
2089          *
2090          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
2091          * on. The subsequent arguments may either be strings, in which case they are the
2092          * message names, or arrays, in which case the first element is the message name,
2093          * and subsequent elements are the parameters to that message.
2094          *
2095          * The special named parameter 'options' in a message specification array is passed
2096          * through to the $options parameter of wfMsgExt().
2097          *
2098          * Don't use this for messages that are not in users interface language.
2099          *
2100          * For example:
2101          *
2102          *    $wgOut->wrapWikiMsg( "<div class='error'>\n$1</div>", 'some-error' );
2103          *
2104          * Is equivalent to:
2105          *
2106          *    $wgOut->addWikiText( "<div class='error'>\n" . wfMsgNoTrans( 'some-error' ) . '</div>' );
2107          *
2108          * The newline after opening div is needed in some wikitext. See bug 19226.
2109          */
2110         public function wrapWikiMsg( $wrap /*, ...*/ ) {
2111                 $msgSpecs = func_get_args();
2112                 array_shift( $msgSpecs );
2113                 $msgSpecs = array_values( $msgSpecs );
2114                 $s = $wrap;
2115                 foreach ( $msgSpecs as $n => $spec ) {
2116                         $options = array();
2117                         if ( is_array( $spec ) ) {
2118                                 $args = $spec;
2119                                 $name = array_shift( $args );
2120                                 if ( isset( $args['options'] ) ) {
2121                                         $options = $args['options'];
2122                                         unset( $args['options'] );
2123                                 }
2124                         }  else {
2125                                 $args = array();
2126                                 $name = $spec;
2127                         }
2128                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
2129                 }
2130                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
2131         }
2132
2133         /**
2134          * Include jQuery core. Use this to avoid loading it multiple times
2135          * before we get usable script loader.
2136          */
2137         public function includeJQuery() {
2138                 if ( $this->mIncludeJQuery ) return;
2139                 $this->mIncludeJQuery = true;
2140
2141                 global $wgScriptPath, $wgStyleVersion, $wgJsMimeType;
2142
2143                 $params = array(
2144                         'type' => $wgJsMimeType,
2145                         'src' => "$wgScriptPath/js2/js2stopgap.min.js?$wgStyleVersion",
2146                 );
2147                 $this->mScripts = Html::element( 'script', $params ) . "\n" . $this->mScripts;
2148         }
2149
2150 }