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