includes/OutputPage.php

   1 <?php
   2 if ( !defined( 'MEDIAWIKI' ) ) {
   3         die( 1 );
   4 }
   5
   6 /**
   7  * This class should be covered by a general architecture document which does
   8  * not exist as of January 2011.  This is one of the Core classes and should
   9  * be read at least once by any new developers.
  10  *
  11  * This class is used to prepare the final rendering. A skin is then
  12  * applied to the output parameters (links, javascript, html, categories ...).
  13  *
  14  * Another class (fixme) handles sending the whole page to the client.
  15  *
  16  * Some comments comes from a pairing session between Zak Greant and Ashar Voultoiz
  17  * in November 2010.
  18  *
  19  * @todo document
  20  */
  21 class OutputPage {
  22         /// Should be private. Used with addMeta() which adds <meta>
  23         var $mMetatags = array();
  24
  25         /// <meta keyworkds="stuff"> most of the time the first 10 links to an article
  26         var $mKeywords = array();
  27
  28         var $mLinktags = array();
  29
  30         /// Additional stylesheets. Looks like this is for extensions. Might be replaced by resource loader.
  31         var $mExtStyles = array();
  32
  33         /// Should be private - has getter and setter. Contains the HTML title
  34         var $mPagetitle = '';
  35
  36         /// Contains all of the <body> content. Should be private we got set/get accessors and the append() method.
  37         var $mBodytext = '';
  38
  39         /**
  40          * Holds the debug lines that will be output as comments in page source if
  41          * $wgDebugComments is enabled. See also $wgShowDebug.
  42          * TODO: make a getter method for this
  43          */
  44         public $mDebugtext = ''; // TODO: we might want to replace it by wfDebug() wfDebugLog()
  45
  46         /// Should be private. Stores contents of <title> tag
  47         var $mHTMLtitle = '';
  48
  49         /// Should be private. Is the displayed content related to the source of the corresponding wiki article.
  50         var $mIsarticle = true;
  51
  52         /**
  53          * Should be private. We have to set isPrintable(). Some pages should
  54          * never be printed (ex: redirections).
  55          */
  56         var $mPrintable = false;
  57
  58         /**
  59          * Should be private. We have set/get/append methods.
  60          *
  61          * Contains the page subtitle. Special pages usually have some links here.
  62          * Don't confuse with site subtitle added by skins.
  63          */
  64         var $mSubtitle = '';
  65
  66         var $mRedirect = '';
  67         var $mStatusCode;
  68
  69         /**
  70          * mLastModified and mEtag are used for sending cache control.
  71          * The whole caching system should probably be moved into its own class.
  72          */
  73         var $mLastModified = '';
  74
  75         /**
  76          * Should be private. No getter but used in sendCacheControl();
  77          * Contains an HTTP Entity Tags (see RFC 2616 section 3.13) which is used
  78          * as a unique identifier for the content. It is later used by the client
  79          * to compare its cached version with the server version. Client sends
  80          * headers If-Match and If-None-Match containing its locally cached ETAG value.
  81          *
  82          * To get more information, you will have to look at HTTP1/1 protocols which
  83          * is properly described in RFC 2616 : http://tools.ietf.org/html/rfc2616
  84          */
  85         var $mETag = false;
  86
  87         var $mCategoryLinks = array();
  88         var $mCategories = array();
  89
  90         /// Should be private. Array of Interwiki Prefixed (non DB key) Titles (e.g. 'fr:Test page')
  91         var $mLanguageLinks = array();
  92
  93         /**
  94          * Should be private. Used for JavaScript (pre resource loader)
  95          * We should split js / css.
  96          * mScripts content is inserted as is in <head> by Skin. This might contains
  97          * either a link to a stylesheet or inline css.
  98          */
  99         var $mScripts = '';
 100
 101         /**
 102          * Inline CSS styles. Use addInlineStyle() sparsingly
 103          */
 104         var $mInlineStyles = '';
 105
 106         //
 107         var $mLinkColours;
 108
 109         /**
 110          * Used by skin template.
 111          * Example: $tpl->set( 'displaytitle', $out->mPageLinkTitle );
 112          */
 113         var $mPageLinkTitle = '';
 114
 115         /// Array of elements in <head>. Parser might add its own headers!
 116         var $mHeadItems = array();
 117
 118         // Next variables probably comes from the resource loader @todo FIXME
 119         var $mModules = array(), $mModuleScripts = array(), $mModuleStyles = array(), $mModuleMessages = array();
 120         var $mResourceLoader;
 121
 122         /** @fixme is this still used ?*/
 123         var $mInlineMsg = array();
 124
 125         var $mTemplateIds = array();
 126         var $mImageTimeKeys = array();
 127
 128         # What level of 'untrustworthiness' is allowed in CSS/JS modules loaded on this page?
 129         # @see ResourceLoaderModule::$origin
 130         # ResourceLoaderModule::ORIGIN_ALL is assumed unless overridden;
 131         protected $mAllowedModules = array(
 132                 ResourceLoaderModule::TYPE_COMBINED => ResourceLoaderModule::ORIGIN_ALL,
 133         );
 134
 135         /**
 136          * @EasterEgg I just love the name for this self documenting variable.
 137          * @todo document
 138          */
 139         var $mDoNothing = false;
 140
 141         // Parser related.
 142         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
 143
 144         /**
 145          * Should be private. Has get/set methods properly documented.
 146          * Stores "article flag" toggle.
 147          */
 148         var $mIsArticleRelated = true;
 149
 150         /// lazy initialised, use parserOptions()
 151         protected $mParserOptions = null;
 152
 153         /**
 154          * Handles the atom / rss links.
 155          * We probably only support atom in 2011.
 156          * Looks like a private variable.
 157          * @see $wgAdvertisedFeedTypes
 158          */
 159         var $mFeedLinks = array();
 160
 161         // Gwicke work on squid caching? Roughly from 2003.
 162         var $mEnableClientCache = true;
 163
 164         /**
 165          * Flag if output should only contain the body of the article.
 166          * Should be private.
 167          */
 168         var $mArticleBodyOnly = false;
 169
 170         var $mNewSectionLink = false;
 171         var $mHideNewSectionLink = false;
 172
 173         /**
 174          * Comes from the parser. This was probably made to load CSS/JS only
 175          * if we had <gallery>. Used directly in CategoryPage.php
 176          * Looks like resource loader can replace this.
 177          */
 178         var $mNoGallery = false;
 179
 180         // should be private.
 181         var $mPageTitleActionText = '';
 182         var $mParseWarnings = array();
 183
 184         // Cache stuff. Looks like mEnableClientCache
 185         var $mSquidMaxage = 0;
 186
 187         // @todo document
 188         var $mPreventClickjacking = true;
 189
 190         /// should be private. To include the variable {{REVISIONID}}
 191         var $mRevisionId = null;
 192
 193         /// Stores a Title object (of the current page).
 194         protected $mTitle = null;
 195
 196         /// Stores a User object (the one the page is being rendered for)
 197         protected $mUser = null;
 198
 199         /**
 200          * An array of stylesheet filenames (relative from skins path), with options
 201          * for CSS media, IE conditions, and RTL/LTR direction.
 202          * For internal use; add settings in the skin via $this->addStyle()
 203          *
 204          * Style again! This seems like a code duplication since we already have
 205          * mStyles. This is what makes OpenSource amazing.
 206          */
 207         var $styles = array();
 208
 209         /**
 210          * Whether jQuery is already handled.
 211          */
 212         protected $mJQueryDone = false;
 213
 214         private $mIndexPolicy = 'index';
 215         private $mFollowPolicy = 'follow';
 216         private $mVaryHeader = array(
 217                 'Accept-Encoding' => array( 'list-contains=gzip' ),
 218                 'Cookie' => null
 219         );
 220
 221         /**
 222          * Redirect to $url rather than displaying the normal page
 223          *
 224          * @param $url String: URL
 225          * @param $responsecode String: HTTP status code
 226          */
 227         public function redirect( $url, $responsecode = '302' ) {
 228                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
 229                 $this->mRedirect = str_replace( "\n", '', $url );
 230                 $this->mRedirectCode = $responsecode;
 231         }
 232
 233         /**
 234          * Get the URL to redirect to, or an empty string if not redirect URL set
 235          *
 236          * @return String
 237          */
 238         public function getRedirect() {
 239                 return $this->mRedirect;
 240         }
 241
 242         /**
 243          * Set the HTTP status code to send with the output.
 244          *
 245          * @param $statusCode Integer
 246          */
 247         public function setStatusCode( $statusCode ) {
 248                 $this->mStatusCode = $statusCode;
 249         }
 250
 251         /**
 252          * Add a new <meta> tag
 253          * To add an http-equiv meta tag, precede the name with "http:"
 254          *
 255          * @param $name String tag name
 256          * @param $val String tag value
 257          */
 258         function addMeta( $name, $val ) {
 259                 array_push( $this->mMetatags, array( $name, $val ) );
 260         }
 261
 262         /**
 263          * Add a keyword or a list of keywords in the page header
 264          *
 265          * @param $text String or array of strings
 266          */
 267         function addKeyword( $text ) {
 268                 if( is_array( $text ) ) {
 269                         $this->mKeywords = array_merge( $this->mKeywords, $text );
 270                 } else {
 271                         array_push( $this->mKeywords, $text );
 272                 }
 273         }
 274
 275         /**
 276          * Add a new \<link\> tag to the page header
 277          *
 278          * @param $linkarr Array: associative array of attributes.
 279          */
 280         function addLink( $linkarr ) {
 281                 array_push( $this->mLinktags, $linkarr );
 282         }
 283
 284         /**
 285          * Add a new \<link\> with "rel" attribute set to "meta"
 286          *
 287          * @param $linkarr Array: associative array mapping attribute names to their
 288          *                 values, both keys and values will be escaped, and the
 289          *                 "rel" attribute will be automatically added
 290          */
 291         function addMetadataLink( $linkarr ) {
 292                 $linkarr['rel'] = $this->getMetadataAttribute();
 293                 $this->addLink( $linkarr );
 294         }
 295
 296         /**
 297          * Get the value of the "rel" attribute for metadata links
 298          *
 299          * @return String
 300          */
 301         private function getMetadataAttribute() {
 302                 # note: buggy CC software only reads first "meta" link
 303                 static $haveMeta = false;
 304                 if ( $haveMeta ) {
 305                         return 'alternate meta';
 306                 } else {
 307                         $haveMeta = true;
 308                         return 'meta';
 309                 }
 310         }
 311
 312         /**
 313          * Add raw HTML to the list of scripts (including \<script\> tag, etc.)
 314          *
 315          * @param $script String: raw HTML
 316          */
 317         function addScript( $script ) {
 318                 $this->mScripts .= $script . "\n";
 319         }
 320
 321         /**
 322          * Register and add a stylesheet from an extension directory.
 323          *
 324          * @param $url String path to sheet.  Provide either a full url (beginning
 325          *             with 'http', etc) or a relative path from the document root
 326          *             (beginning with '/').  Otherwise it behaves identically to
 327          *             addStyle() and draws from the /skins folder.
 328          */
 329         public function addExtensionStyle( $url ) {
 330                 array_push( $this->mExtStyles, $url );
 331         }
 332
 333         /**
 334          * Get all styles added by extensions
 335          *
 336          * @return Array
 337          */
 338         function getExtStyle() {
 339                 return $this->mExtStyles;
 340         }
 341
 342         /**
 343          * Add a JavaScript file out of skins/common, or a given relative path.
 344          *
 345          * @param $file String: filename in skins/common or complete on-server path
 346          *              (/foo/bar.js)
 347          * @param $version String: style version of the file. Defaults to $wgStyleVersion
 348          */
 349         public function addScriptFile( $file, $version = null ) {
 350                 global $wgStylePath, $wgStyleVersion;
 351                 // See if $file parameter is an absolute URL or begins with a slash
 352                 if( substr( $file, 0, 1 ) == '/' || preg_match( '#^[a-z]*://#i', $file ) ) {
 353                         $path = $file;
 354                 } else {
 355                         $path = "{$wgStylePath}/common/{$file}";
 356                 }
 357                 if ( is_null( $version ) )
 358                         $version = $wgStyleVersion;
 359                 $this->addScript( Html::linkedScript( wfAppendQuery( $path, $version ) ) );
 360         }
 361
 362         /**
 363          * Add a self-contained script tag with the given contents
 364          *
 365          * @param $script String: JavaScript text, no <script> tags
 366          */
 367         public function addInlineScript( $script ) {
 368                 $this->mScripts .= Html::inlineScript( "\n$script\n" ) . "\n";
 369         }
 370
 371         /**
 372          * Get all registered JS and CSS tags for the header.
 373          *
 374          * @return String
 375          */
 376         function getScript() {
 377                 return $this->mScripts . $this->getHeadItems();
 378         }
 379
 380         /**
 381          * Filter an array of modules to remove insufficiently trustworthy members, and modules
 382          * which are no longer registered (eg a page is cached before an extension is disabled)
 383          * @param $modules Array
 384          * @return Array
 385          */
 386         protected function filterModules( $modules, $type = ResourceLoaderModule::TYPE_COMBINED ){
 387                 $resourceLoader = $this->getResourceLoader();
 388                 $filteredModules = array();
 389                 foreach( $modules as $val ){
 390                         $module = $resourceLoader->getModule( $val );
 391                         if( $module instanceof ResourceLoaderModule
 392                                 && $module->getOrigin() <= $this->getAllowedModules( $type ) )
 393                         {
 394                                 $filteredModules[] = $val;
 395                         }
 396                 }
 397                 return $filteredModules;
 398         }
 399
 400         /**
 401          * Get the list of modules to include on this page
 402          *
 403          * @param $filter Bool whether to filter out insufficiently trustworthy modules
 404          * @return Array of module names
 405          */
 406         public function getModules( $filter = false, $param = 'mModules' ) {
 407                 $modules = array_values( array_unique( $this->$param ) );
 408                 return $filter
 409                         ? $this->filterModules( $modules )
 410                         : $modules;
 411         }
 412
 413         /**
 414          * Add one or more modules recognized by the resource loader. Modules added
 415          * through this function will be loaded by the resource loader when the
 416          * page loads.
 417          *
 418          * @param $modules Mixed: module name (string) or array of module names
 419          */
 420         public function addModules( $modules ) {
 421                 $this->mModules = array_merge( $this->mModules, (array)$modules );
 422         }
 423
 424         /**
 425          * Get the list of module JS to include on this page
 426          * @return array of module names
 427          */
 428         public function getModuleScripts( $filter = false ) {
 429                 return $this->getModules( $filter, 'mModuleScripts' );
 430         }
 431
 432         /**
 433          * Add only JS of one or more modules recognized by the resource loader. Module
 434          * scripts added through this function will be loaded by the resource loader when
 435          * the page loads.
 436          *
 437          * @param $modules Mixed: module name (string) or array of module names
 438          */
 439         public function addModuleScripts( $modules ) {
 440                 $this->mModuleScripts = array_merge( $this->mModuleScripts, (array)$modules );
 441         }
 442
 443         /**
 444          * Get the list of module CSS to include on this page
 445          *
 446          * @return Array of module names
 447          */
 448         public function getModuleStyles( $filter = false ) {
 449                 return $this->getModules( $filter, 'mModuleStyles' );
 450         }
 451
 452         /**
 453          * Add only CSS of one or more modules recognized by the resource loader. Module
 454          * styles added through this function will be loaded by the resource loader when
 455          * the page loads.
 456          *
 457          * @param $modules Mixed: module name (string) or array of module names
 458          */
 459         public function addModuleStyles( $modules ) {
 460                 $this->mModuleStyles = array_merge( $this->mModuleStyles, (array)$modules );
 461         }
 462
 463         /**
 464          * Get the list of module messages to include on this page
 465          *
 466          * @return Array of module names
 467          */
 468         public function getModuleMessages( $filter = false ) {
 469                 return $this->getModules( $filter, 'mModuleMessages' );
 470         }
 471
 472         /**
 473          * Add only messages of one or more modules recognized by the resource loader.
 474          * Module messages added through this function will be loaded by the resource
 475          * loader when the page loads.
 476          *
 477          * @param $modules Mixed: module name (string) or array of module names
 478          */
 479         public function addModuleMessages( $modules ) {
 480                 $this->mModuleMessages = array_merge( $this->mModuleMessages, (array)$modules );
 481         }
 482
 483         /**
 484          * Get all header items in a string
 485          *
 486          * @return String
 487          */
 488         function getHeadItems() {
 489                 $s = '';
 490                 foreach ( $this->mHeadItems as $item ) {
 491                         $s .= $item;
 492                 }
 493                 return $s;
 494         }
 495
 496         /**
 497          * Add or replace an header item to the output
 498          *
 499          * @param $name String: item name
 500          * @param $value String: raw HTML
 501          */
 502         public function addHeadItem( $name, $value ) {
 503                 $this->mHeadItems[$name] = $value;
 504         }
 505
 506         /**
 507          * Check if the header item $name is already set
 508          *
 509          * @param $name String: item name
 510          * @return Boolean
 511          */
 512         public function hasHeadItem( $name ) {
 513                 return isset( $this->mHeadItems[$name] );
 514         }
 515
 516         /**
 517          * Set the value of the ETag HTTP header, only used if $wgUseETag is true
 518          *
 519          * @param $tag String: value of "ETag" header
 520          */
 521         function setETag( $tag ) {
 522                 $this->mETag = $tag;
 523         }
 524
 525         /**
 526          * Set whether the output should only contain the body of the article,
 527          * without any skin, sidebar, etc.
 528          * Used e.g. when calling with "action=render".
 529          *
 530          * @param $only Boolean: whether to output only the body of the article
 531          */
 532         public function setArticleBodyOnly( $only ) {
 533                 $this->mArticleBodyOnly = $only;
 534         }
 535
 536         /**
 537          * Return whether the output will contain only the body of the article
 538          *
 539          * @return Boolean
 540          */
 541         public function getArticleBodyOnly() {
 542                 return $this->mArticleBodyOnly;
 543         }
 544
 545         /**
 546          * checkLastModified tells the client to use the client-cached page if
 547          * possible. If sucessful, the OutputPage is disabled so that
 548          * any future call to OutputPage->output() have no effect.
 549          *
 550          * Side effect: sets mLastModified for Last-Modified header
 551          *
 552          * @return Boolean: true iff cache-ok headers was sent.
 553          */
 554         public function checkLastModified( $timestamp ) {
 555                 global $wgCachePages, $wgCacheEpoch, $wgRequest;
 556
 557                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 558                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 559                         return false;
 560                 }
 561                 if( !$wgCachePages ) {
 562                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 563                         return false;
 564                 }
 565                 if( $this->getUser()->getOption( 'nocache' ) ) {
 566                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 567                         return false;
 568                 }
 569
 570                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 571                 $modifiedTimes = array(
 572                         'page' => $timestamp,
 573                         'user' => $this->getUser()->getTouched(),
 574                         'epoch' => $wgCacheEpoch
 575                 );
 576                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 577
 578                 $maxModified = max( $modifiedTimes );
 579                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 580
 581                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 582                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 583                         return false;
 584                 }
 585
 586                 # Make debug info
 587                 $info = '';
 588                 foreach ( $modifiedTimes as $name => $value ) {
 589                         if ( $info !== '' ) {
 590                                 $info .= ', ';
 591                         }
 592                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 593                 }
 594
 595                 # IE sends sizes after the date like this:
 596                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 597                 # this breaks strtotime().
 598                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 599
 600                 wfSuppressWarnings(); // E_STRICT system time bitching
 601                 $clientHeaderTime = strtotime( $clientHeader );
 602                 wfRestoreWarnings();
 603                 if ( !$clientHeaderTime ) {
 604                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 605                         return false;
 606                 }
 607                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 608
 609                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 610                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 611                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 612                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 613                 if( $clientHeaderTime < $maxModified ) {
 614                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 615                         return false;
 616                 }
 617
 618                 # Not modified
 619                 # Give a 304 response code and disable body output
 620                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 621                 ini_set( 'zlib.output_compression', 0 );
 622                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 623                 $this->sendCacheControl();
 624                 $this->disable();
 625
 626                 // Don't output a compressed blob when using ob_gzhandler;
 627                 // it's technically against HTTP spec and seems to confuse
 628                 // Firefox when the response gets split over two packets.
 629                 wfClearOutputBuffers();
 630
 631                 return true;
 632         }
 633
 634         /**
 635          * Override the last modified timestamp
 636          *
 637          * @param $timestamp String: new timestamp, in a format readable by
 638          *        wfTimestamp()
 639          */
 640         public function setLastModified( $timestamp ) {
 641                 $this->mLastModified = wfTimestamp( TS_RFC2822, $timestamp );
 642         }
 643
 644         /**
 645          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 646          *
 647          * @param $policy String: the literal string to output as the contents of
 648          *   the meta tag.  Will be parsed according to the spec and output in
 649          *   standardized form.
 650          * @return null
 651          */
 652         public function setRobotPolicy( $policy ) {
 653                 $policy = Article::formatRobotPolicy( $policy );
 654
 655                 if( isset( $policy['index'] ) ) {
 656                         $this->setIndexPolicy( $policy['index'] );
 657                 }
 658                 if( isset( $policy['follow'] ) ) {
 659                         $this->setFollowPolicy( $policy['follow'] );
 660                 }
 661         }
 662
 663         /**
 664          * Set the index policy for the page, but leave the follow policy un-
 665          * touched.
 666          *
 667          * @param $policy string Either 'index' or 'noindex'.
 668          * @return null
 669          */
 670         public function setIndexPolicy( $policy ) {
 671                 $policy = trim( $policy );
 672                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 673                         $this->mIndexPolicy = $policy;
 674                 }
 675         }
 676
 677         /**
 678          * Set the follow policy for the page, but leave the index policy un-
 679          * touched.
 680          *
 681          * @param $policy String: either 'follow' or 'nofollow'.
 682          * @return null
 683          */
 684         public function setFollowPolicy( $policy ) {
 685                 $policy = trim( $policy );
 686                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 687                         $this->mFollowPolicy = $policy;
 688                 }
 689         }
 690
 691         /**
 692          * Set the new value of the "action text", this will be added to the
 693          * "HTML title", separated from it with " - ".
 694          *
 695          * @param $text String: new value of the "action text"
 696          */
 697         public function setPageTitleActionText( $text ) {
 698                 $this->mPageTitleActionText = $text;
 699         }
 700
 701         /**
 702          * Get the value of the "action text"
 703          *
 704          * @return String
 705          */
 706         public function getPageTitleActionText() {
 707                 if ( isset( $this->mPageTitleActionText ) ) {
 708                         return $this->mPageTitleActionText;
 709                 }
 710         }
 711
 712         /**
 713          * "HTML title" means the contents of <title>.
 714          * It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 715          */
 716         public function setHTMLTitle( $name ) {
 717                 $this->mHTMLtitle = $name;
 718         }
 719
 720         /**
 721          * Return the "HTML title", i.e. the content of the <title> tag.
 722          *
 723          * @return String
 724          */
 725         public function getHTMLTitle() {
 726                 return $this->mHTMLtitle;
 727         }
 728
 729         /**
 730          * "Page title" means the contents of \<h1\>. It is stored as a valid HTML fragment.
 731          * This function allows good tags like \<sup\> in the \<h1\> tag, but not bad tags like \<script\>.
 732          * This function automatically sets \<title\> to the same content as \<h1\> but with all tags removed.
 733          * Bad tags that were escaped in \<h1\> will still be escaped in \<title\>, and good tags like \<i\> will be dropped entirely.
 734          */
 735         public function setPageTitle( $name ) {
 736                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 737                 # but leave "<i>foobar</i>" alone
 738                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 739                 $this->mPagetitle = $nameWithTags;
 740
 741                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 742                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 743         }
 744
 745         /**
 746          * Return the "page title", i.e. the content of the \<h1\> tag.
 747          *
 748          * @return String
 749          */
 750         public function getPageTitle() {
 751                 return $this->mPagetitle;
 752         }
 753
 754         /**
 755          * Set the Title object to use
 756          *
 757          * @param $t Title object
 758          */
 759         public function setTitle( $t ) {
 760                 $this->mTitle = $t;
 761         }
 762
 763         /**
 764          * Get the Title object used in this instance
 765          *
 766          * @return Title
 767          */
 768         public function getTitle() {
 769                 if ( $this->mTitle instanceof Title ) {
 770                         return $this->mTitle;
 771                 } else {
 772                         wfDebug( __METHOD__ . " called and \$mTitle is null. Return \$wgTitle for sanity\n" );
 773                         global $wgTitle;
 774                         return $wgTitle;
 775                 }
 776         }
 777
 778         /**
 779          * Set the User object to use
 780          *
 781          * @param $u User object
 782          */
 783         public function setUser( $u ) {
 784                 $this->mUser = $u;
 785         }
 786
 787         /**
 788          * Get the User object used in this instance
 789          *
 790          * @return User
 791          */
 792         public function getUser() {
 793                 if ( !isset($this->mUser) ) {
 794                         wfDebug( __METHOD__ . " called and \$mUser is null. Return \$wgUser for sanity\n" );
 795                         global $wgUser;
 796                         return $wgUser;
 797                 }
 798                 return $this->mUser;
 799         }
 800
 801         /**
 802          * Get the Skin object used to render this instance
 803          *
 804          * @return Skin
 805          */
 806         public function getSkin() {
 807                 // For now we'll just proxy to the user. In the future a saner location for
 808                 // organizing what skin to use may be chosen
 809                 return $this->getUser()->getSkin();
 810         }
 811
 812         /**
 813          * Replace the subtile with $str
 814          *
 815          * @param $str String: new value of the subtitle
 816          */
 817         public function setSubtitle( $str ) {
 818                 $this->mSubtitle = /*$this->parse(*/ $str /*)*/; // @bug 2514
 819         }
 820
 821         /**
 822          * Add $str to the subtitle
 823          *
 824          * @param $str String to add to the subtitle
 825          */
 826         public function appendSubtitle( $str ) {
 827                 $this->mSubtitle .= /*$this->parse(*/ $str /*)*/; // @bug 2514
 828         }
 829
 830         /**
 831          * Get the subtitle
 832          *
 833          * @return String
 834          */
 835         public function getSubtitle() {
 836                 return $this->mSubtitle;
 837         }
 838
 839         /**
 840          * Set the page as printable, i.e. it'll be displayed with with all
 841          * print styles included
 842          */
 843         public function setPrintable() {
 844                 $this->mPrintable = true;
 845         }
 846
 847         /**
 848          * Return whether the page is "printable"
 849          *
 850          * @return Boolean
 851          */
 852         public function isPrintable() {
 853                 return $this->mPrintable;
 854         }
 855
 856         /**
 857          * Disable output completely, i.e. calling output() will have no effect
 858          */
 859         public function disable() {
 860                 $this->mDoNothing = true;
 861         }
 862
 863         /**
 864          * Return whether the output will be completely disabled
 865          *
 866          * @return Boolean
 867          */
 868         public function isDisabled() {
 869                 return $this->mDoNothing;
 870         }
 871
 872         /**
 873          * Show an "add new section" link?
 874          *
 875          * @return Boolean
 876          */
 877         public function showNewSectionLink() {
 878                 return $this->mNewSectionLink;
 879         }
 880
 881         /**
 882          * Forcibly hide the new section link?
 883          *
 884          * @return Boolean
 885          */
 886         public function forceHideNewSectionLink() {
 887                 return $this->mHideNewSectionLink;
 888         }
 889
 890         /**
 891          * Add or remove feed links in the page header
 892          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 893          * for the new version
 894          * @see addFeedLink()
 895          *
 896          * @param $show Boolean: true: add default feeds, false: remove all feeds
 897          */
 898         public function setSyndicated( $show = true ) {
 899                 if ( $show ) {
 900                         $this->setFeedAppendQuery( false );
 901                 } else {
 902                         $this->mFeedLinks = array();
 903                 }
 904         }
 905
 906         /**
 907          * Add default feeds to the page header
 908          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 909          * for the new version
 910          * @see addFeedLink()
 911          *
 912          * @param $val String: query to append to feed links or false to output
 913          *        default links
 914          */
 915         public function setFeedAppendQuery( $val ) {
 916                 global $wgAdvertisedFeedTypes;
 917
 918                 $this->mFeedLinks = array();
 919
 920                 foreach ( $wgAdvertisedFeedTypes as $type ) {
 921                         $query = "feed=$type";
 922                         if ( is_string( $val ) ) {
 923                                 $query .= '&' . $val;
 924                         }
 925                         $this->mFeedLinks[$type] = $this->getTitle()->getLocalURL( $query );
 926                 }
 927         }
 928
 929         /**
 930          * Add a feed link to the page header
 931          *
 932          * @param $format String: feed type, should be a key of $wgFeedClasses
 933          * @param $href String: URL
 934          */
 935         public function addFeedLink( $format, $href ) {
 936                 global $wgAdvertisedFeedTypes;
 937
 938                 if ( in_array( $format, $wgAdvertisedFeedTypes ) ) {
 939                         $this->mFeedLinks[$format] = $href;
 940                 }
 941         }
 942
 943         /**
 944          * Should we output feed links for this page?
 945          * @return Boolean
 946          */
 947         public function isSyndicated() {
 948                 return count( $this->mFeedLinks ) > 0;
 949         }
 950
 951         /**
 952          * Return URLs for each supported syndication format for this page.
 953          * @return array associating format keys with URLs
 954          */
 955         public function getSyndicationLinks() {
 956                 return $this->mFeedLinks;
 957         }
 958
 959         /**
 960          * Will currently always return null
 961          *
 962          * @return null
 963          */
 964         public function getFeedAppendQuery() {
 965                 return $this->mFeedLinksAppendQuery;
 966         }
 967
 968         /**
 969          * Set whether the displayed content is related to the source of the
 970          * corresponding article on the wiki
 971          * Setting true will cause the change "article related" toggle to true
 972          *
 973          * @param $v Boolean
 974          */
 975         public function setArticleFlag( $v ) {
 976                 $this->mIsarticle = $v;
 977                 if ( $v ) {
 978                         $this->mIsArticleRelated = $v;
 979                 }
 980         }
 981
 982         /**
 983          * Return whether the content displayed page is related to the source of
 984          * the corresponding article on the wiki
 985          *
 986          * @return Boolean
 987          */
 988         public function isArticle() {
 989                 return $this->mIsarticle;
 990         }
 991
 992         /**
 993          * Set whether this page is related an article on the wiki
 994          * Setting false will cause the change of "article flag" toggle to false
 995          *
 996          * @param $v Boolean
 997          */
 998         public function setArticleRelated( $v ) {
 999                 $this->mIsArticleRelated = $v;
1000                 if ( !$v ) {
1001                         $this->mIsarticle = false;
1002                 }
1003         }
1004
1005         /**
1006          * Return whether this page is related an article on the wiki
1007          *
1008          * @return Boolean
1009          */
1010         public function isArticleRelated() {
1011                 return $this->mIsArticleRelated;
1012         }
1013
1014         /**
1015          * Add new language links
1016          *
1017          * @param $newLinkArray Associative array mapping language code to the page
1018          *                      name
1019          */
1020         public function addLanguageLinks( $newLinkArray ) {
1021                 $this->mLanguageLinks += $newLinkArray;
1022         }
1023
1024         /**
1025          * Reset the language links and add new language links
1026          *
1027          * @param $newLinkArray Associative array mapping language code to the page
1028          *                      name
1029          */
1030         public function setLanguageLinks( $newLinkArray ) {
1031                 $this->mLanguageLinks = $newLinkArray;
1032         }
1033
1034         /**
1035          * Get the list of language links
1036          *
1037          * @return Array of Interwiki Prefixed (non DB key) Titles (e.g. 'fr:Test page')
1038          */
1039         public function getLanguageLinks() {
1040                 return $this->mLanguageLinks;
1041         }
1042
1043         /**
1044          * Add an array of categories, with names in the keys
1045          *
1046          * @param $categories Array mapping category name => sort key
1047          */
1048         public function addCategoryLinks( $categories ) {
1049                 global $wgContLang;
1050
1051                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
1052                         return;
1053                 }
1054
1055                 # Add the links to a LinkBatch
1056                 $arr = array( NS_CATEGORY => $categories );
1057                 $lb = new LinkBatch;
1058                 $lb->setArray( $arr );
1059
1060                 # Fetch existence plus the hiddencat property
1061                 $dbr = wfGetDB( DB_SLAVE );
1062                 $res = $dbr->select( array( 'page', 'page_props' ),
1063                         array( 'page_id', 'page_namespace', 'page_title', 'page_len', 'page_is_redirect', 'page_latest', 'pp_value' ),
1064                         $lb->constructSet( 'page', $dbr ),
1065                         __METHOD__,
1066                         array(),
1067                         array( 'page_props' => array( 'LEFT JOIN', array( 'pp_propname' => 'hiddencat', 'pp_page = page_id' ) ) )
1068                 );
1069
1070                 # Add the results to the link cache
1071                 $lb->addResultToCache( LinkCache::singleton(), $res );
1072
1073                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
1074                 $categories = array_combine(
1075                         array_keys( $categories ),
1076                         array_fill( 0, count( $categories ), 'normal' )
1077                 );
1078
1079                 # Mark hidden categories
1080                 foreach ( $res as $row ) {
1081                         if ( isset( $row->pp_value ) ) {
1082                                 $categories[$row->page_title] = 'hidden';
1083                         }
1084                 }
1085
1086                 # Add the remaining categories to the skin
1087                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
1088                         foreach ( $categories as $category => $type ) {
1089                                 $origcategory = $category;
1090                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
1091                                 $wgContLang->findVariantLink( $category, $title, true );
1092                                 if ( $category != $origcategory ) {
1093                                         if ( array_key_exists( $category, $categories ) ) {
1094                                                 continue;
1095                                         }
1096                                 }
1097                                 $text = $wgContLang->convertHtml( $title->getText() );
1098                                 $this->mCategories[] = $title->getText();
1099                                 $this->mCategoryLinks[$type][] = $this->getSkin()->link( $title, $text );
1100                         }
1101                 }
1102         }
1103
1104         /**
1105          * Reset the category links (but not the category list) and add $categories
1106          *
1107          * @param $categories Array mapping category name => sort key
1108          */
1109         public function setCategoryLinks( $categories ) {
1110                 $this->mCategoryLinks = array();
1111                 $this->addCategoryLinks( $categories );
1112         }
1113
1114         /**
1115          * Get the list of category links, in a 2-D array with the following format:
1116          * $arr[$type][] = $link, where $type is either "normal" or "hidden" (for
1117          * hidden categories) and $link a HTML fragment with a link to the category
1118          * page
1119          *
1120          * @return Array
1121          */
1122         public function getCategoryLinks() {
1123                 return $this->mCategoryLinks;
1124         }
1125
1126         /**
1127          * Get the list of category names this page belongs to
1128          *
1129          * @return Array of strings
1130          */
1131         public function getCategories() {
1132                 return $this->mCategories;
1133         }
1134
1135         /**
1136          * Do not allow scripts which can be modified by wiki users to load on this page;
1137          * only allow scripts bundled with, or generated by, the software.
1138          */
1139         public function disallowUserJs() {
1140                 $this->reduceAllowedModules(
1141                         ResourceLoaderModule::TYPE_SCRIPTS,
1142                         ResourceLoaderModule::ORIGIN_CORE_INDIVIDUAL
1143                 );
1144         }
1145
1146         /**
1147          * Return whether user JavaScript is allowed for this page
1148          * @deprecated since 1.18 Load modules with ResourceLoader, and origin and
1149          *     trustworthiness is identified and enforced automagically.
1150          * @return Boolean
1151          */
1152         public function isUserJsAllowed() {
1153                 return $this->getAllowedModules( ResourceLoaderModule::TYPE_SCRIPTS ) >= ResourceLoaderModule::ORIGIN_USER_INDIVIDUAL;
1154         }
1155
1156         /**
1157          * Show what level of JavaScript / CSS untrustworthiness is allowed on this page
1158          * @see ResourceLoaderModule::$origin
1159          * @param $type String ResourceLoaderModule TYPE_ constant
1160          * @return Int ResourceLoaderModule ORIGIN_ class constant
1161          */
1162         public function getAllowedModules( $type ){
1163                 if( $type == ResourceLoaderModule::TYPE_COMBINED ){
1164                         return min( array_values( $this->mAllowedModules ) );
1165                 } else {
1166                         return isset( $this->mAllowedModules[$type] )
1167                                 ? $this->mAllowedModules[$type]
1168                                 : ResourceLoaderModule::ORIGIN_ALL;
1169                 }
1170         }
1171
1172         /**
1173          * Set the highest level of CSS/JS untrustworthiness allowed
1174          * @param  $type String ResourceLoaderModule TYPE_ constant
1175          * @param  $level Int ResourceLoaderModule class constant
1176          */
1177         public function setAllowedModules( $type, $level ){
1178                 $this->mAllowedModules[$type] = $level;
1179         }
1180
1181         /**
1182          * As for setAllowedModules(), but don't inadvertantly make the page more accessible
1183          * @param  $type String
1184          * @param  $level Int ResourceLoaderModule class constant
1185          */
1186         public function reduceAllowedModules( $type, $level ){
1187                 $this->mAllowedModules[$type] = min( $this->getAllowedModules($type), $level );
1188         }
1189
1190         /**
1191          * Prepend $text to the body HTML
1192          *
1193          * @param $text String: HTML
1194          */
1195         public function prependHTML( $text ) {
1196                 $this->mBodytext = $text . $this->mBodytext;
1197         }
1198
1199         /**
1200          * Append $text to the body HTML
1201          *
1202          * @param $text String: HTML
1203          */
1204         public function addHTML( $text ) {
1205                 $this->mBodytext .= $text;
1206         }
1207
1208         /**
1209          * Clear the body HTML
1210          */
1211         public function clearHTML() {
1212                 $this->mBodytext = '';
1213         }
1214
1215         /**
1216          * Get the body HTML
1217          *
1218          * @return String: HTML
1219          */
1220         public function getHTML() {
1221                 return $this->mBodytext;
1222         }
1223
1224         /**
1225          * Add $text to the debug output
1226          *
1227          * @param $text String: debug text
1228          */
1229         public function debug( $text ) {
1230                 $this->mDebugtext .= $text;
1231         }
1232
1233         /**
1234          * Get/set the ParserOptions object to use for wikitext parsing
1235          *
1236          * @param $options either the ParserOption to use or null to only get the
1237          *                 current ParserOption object
1238          * @return ParserOptions object
1239          */
1240         public function parserOptions( $options = null ) {
1241                 if ( !$this->mParserOptions ) {
1242                         $this->mParserOptions = new ParserOptions;
1243                 }
1244                 return wfSetVar( $this->mParserOptions, $options );
1245         }
1246
1247         /**
1248          * Set the revision ID which will be seen by the wiki text parser
1249          * for things such as embedded {{REVISIONID}} variable use.
1250          *
1251          * @param $revid Mixed: an positive integer, or null
1252          * @return Mixed: previous value
1253          */
1254         public function setRevisionId( $revid ) {
1255                 $val = is_null( $revid ) ? null : intval( $revid );
1256                 return wfSetVar( $this->mRevisionId, $val );
1257         }
1258
1259         /**
1260          * Get the current revision ID
1261          *
1262          * @return Integer
1263          */
1264         public function getRevisionId() {
1265                 return $this->mRevisionId;
1266         }
1267
1268         /**
1269          * Convert wikitext to HTML and add it to the buffer
1270          * Default assumes that the current page title will be used.
1271          *
1272          * @param $text String
1273          * @param $linestart Boolean: is this the start of a line?
1274          */
1275         public function addWikiText( $text, $linestart = true ) {
1276                 $title = $this->getTitle(); // Work arround E_STRICT
1277                 $this->addWikiTextTitle( $text, $title, $linestart );
1278         }
1279
1280         /**
1281          * Add wikitext with a custom Title object
1282          *
1283          * @param $text String: wikitext
1284          * @param $title Title object
1285          * @param $linestart Boolean: is this the start of a line?
1286          */
1287         public function addWikiTextWithTitle( $text, &$title, $linestart = true ) {
1288                 $this->addWikiTextTitle( $text, $title, $linestart );
1289         }
1290
1291         /**
1292          * Add wikitext with a custom Title object and
1293          *
1294          * @param $text String: wikitext
1295          * @param $title Title object
1296          * @param $linestart Boolean: is this the start of a line?
1297          */
1298         function addWikiTextTitleTidy( $text, &$title, $linestart = true ) {
1299                 $this->addWikiTextTitle( $text, $title, $linestart, true );
1300         }
1301
1302         /**
1303          * Add wikitext with tidy enabled
1304          *
1305          * @param $text String: wikitext
1306          * @param $linestart Boolean: is this the start of a line?
1307          */
1308         public function addWikiTextTidy( $text, $linestart = true ) {
1309                 $title = $this->getTitle();
1310                 $this->addWikiTextTitleTidy( $text, $title, $linestart );
1311         }
1312
1313         /**
1314          * Add wikitext with a custom Title object
1315          *
1316          * @param $text String: wikitext
1317          * @param $title Title object
1318          * @param $linestart Boolean: is this the start of a line?
1319          * @param $tidy Boolean: whether to use tidy
1320          */
1321         public function addWikiTextTitle( $text, &$title, $linestart, $tidy = false ) {
1322                 global $wgParser;
1323
1324                 wfProfileIn( __METHOD__ );
1325
1326                 wfIncrStats( 'pcache_not_possible' );
1327
1328                 $popts = $this->parserOptions();
1329                 $oldTidy = $popts->setTidy( $tidy );
1330
1331                 $parserOutput = $wgParser->parse(
1332                         $text, $title, $popts,
1333                         $linestart, true, $this->mRevisionId
1334                 );
1335
1336                 $popts->setTidy( $oldTidy );
1337
1338                 $this->addParserOutput( $parserOutput );
1339
1340                 wfProfileOut( __METHOD__ );
1341         }
1342
1343         /**
1344          * Add a ParserOutput object, but without Html
1345          *
1346          * @param $parserOutput ParserOutput object
1347          */
1348         public function addParserOutputNoText( &$parserOutput ) {
1349                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
1350                 $this->addCategoryLinks( $parserOutput->getCategories() );
1351                 $this->mNewSectionLink = $parserOutput->getNewSection();
1352                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
1353
1354                 $this->mParseWarnings = $parserOutput->getWarnings();
1355                 if ( !$parserOutput->isCacheable() ) {
1356                         $this->enableClientCache( false );
1357                 }
1358                 $this->mNoGallery = $parserOutput->getNoGallery();
1359                 $this->mHeadItems = array_merge( $this->mHeadItems, $parserOutput->getHeadItems() );
1360                 $this->addModules( $parserOutput->getModules() );
1361
1362                 // Template versioning...
1363                 foreach ( (array)$parserOutput->getTemplateIds() as $ns => $dbks ) {
1364                         if ( isset( $this->mTemplateIds[$ns] ) ) {
1365                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
1366                         } else {
1367                                 $this->mTemplateIds[$ns] = $dbks;
1368                         }
1369                 }
1370                 // File versioning...
1371                 foreach ( (array)$parserOutput->getImageTimeKeys() as $dbk => $data ) {
1372                         $this->mImageTimeKeys[$dbk] = $data;
1373                 }
1374
1375                 // Hooks registered in the object
1376                 global $wgParserOutputHooks;
1377                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
1378                         list( $hookName, $data ) = $hookInfo;
1379                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
1380                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
1381                         }
1382                 }
1383
1384                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
1385         }
1386
1387         /**
1388          * Add a ParserOutput object
1389          *
1390          * @param $parserOutput ParserOutput
1391          */
1392         function addParserOutput( &$parserOutput ) {
1393                 $this->addParserOutputNoText( $parserOutput );
1394                 $text = $parserOutput->getText();
1395                 wfRunHooks( 'OutputPageBeforeHTML', array( &$this, &$text ) );
1396                 $this->addHTML( $text );
1397         }
1398
1399
1400         /**
1401          * Add the output of a QuickTemplate to the output buffer
1402          *
1403          * @param $template QuickTemplate
1404          */
1405         public function addTemplate( &$template ) {
1406                 ob_start();
1407                 $template->execute();
1408                 $this->addHTML( ob_get_contents() );
1409                 ob_end_clean();
1410         }
1411
1412         /**
1413          * Parse wikitext and return the HTML.
1414          *
1415          * @param $text String
1416          * @param $linestart Boolean: is this the start of a line?
1417          * @param $interface Boolean: use interface language ($wgLang instead of
1418          *                   $wgContLang) while parsing language sensitive magic
1419          *                   words like GRAMMAR and PLURAL
1420          * @param $language  Language object: target language object, will override
1421          *                   $interface
1422          * @return String: HTML
1423          */
1424         public function parse( $text, $linestart = true, $interface = false, $language = null ) {
1425                 // Check one for one common cause for parser state resetting
1426                 $callers = wfGetAllCallers( 10 );
1427                 if ( strpos( $callers, 'Parser::extensionSubstitution' ) !== false ) {
1428                         throw new MWException( "wfMsg* function with parsing cannot be used " .
1429                                 "inside a tag hook. Should use parser->recursiveTagParse() instead" );
1430                 }
1431
1432                 global $wgParser;
1433
1434                 if( is_null( $this->getTitle() ) ) {
1435                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
1436                 }
1437
1438                 $popts = $this->parserOptions();
1439                 if ( $interface ) {
1440                         $popts->setInterfaceMessage( true );
1441                 }
1442                 if ( $language !== null ) {
1443                         $oldLang = $popts->setTargetLanguage( $language );
1444                 }
1445
1446                 $parserOutput = $wgParser->parse(
1447                         $text, $this->getTitle(), $popts,
1448                         $linestart, true, $this->mRevisionId
1449                 );
1450
1451                 if ( $interface ) {
1452                         $popts->setInterfaceMessage( false );
1453                 }
1454                 if ( $language !== null ) {
1455                         $popts->setTargetLanguage( $oldLang );
1456                 }
1457
1458                 return $parserOutput->getText();
1459         }
1460
1461         /**
1462          * Parse wikitext, strip paragraphs, and return the HTML.
1463          *
1464          * @param $text String
1465          * @param $linestart Boolean: is this the start of a line?
1466          * @param $interface Boolean: use interface language ($wgLang instead of
1467          *                   $wgContLang) while parsing language sensitive magic
1468          *                   words like GRAMMAR and PLURAL
1469          * @return String: HTML
1470          */
1471         public function parseInline( $text, $linestart = true, $interface = false ) {
1472                 $parsed = $this->parse( $text, $linestart, $interface );
1473
1474                 $m = array();
1475                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
1476                         $parsed = $m[1];
1477                 }
1478
1479                 return $parsed;
1480         }
1481
1482         /**
1483          * Set the value of the "s-maxage" part of the "Cache-control" HTTP header
1484          *
1485          * @param $maxage Integer: maximum cache time on the Squid, in seconds.
1486          */
1487         public function setSquidMaxage( $maxage ) {
1488                 $this->mSquidMaxage = $maxage;
1489         }
1490
1491         /**
1492          * Use enableClientCache(false) to force it to send nocache headers
1493          *
1494          * @param $state ??
1495          */
1496         public function enableClientCache( $state ) {
1497                 return wfSetVar( $this->mEnableClientCache, $state );
1498         }
1499
1500         /**
1501          * Get the list of cookies that will influence on the cache
1502          *
1503          * @return Array
1504          */
1505         function getCacheVaryCookies() {
1506                 global $wgCookiePrefix, $wgCacheVaryCookies;
1507                 static $cookies;
1508                 if ( $cookies === null ) {
1509                         $cookies = array_merge(
1510                                 array(
1511                                         "{$wgCookiePrefix}Token",
1512                                         "{$wgCookiePrefix}LoggedOut",
1513                                         session_name()
1514                                 ),
1515                                 $wgCacheVaryCookies
1516                         );
1517                         wfRunHooks( 'GetCacheVaryCookies', array( $this, &$cookies ) );
1518                 }
1519                 return $cookies;
1520         }
1521
1522         /**
1523          * Return whether this page is not cacheable because "useskin" or "uselang"
1524          * URL parameters were passed.
1525          *
1526          * @return Boolean
1527          */
1528         function uncacheableBecauseRequestVars() {
1529                 global $wgRequest;
1530                 return $wgRequest->getText( 'useskin', false ) === false
1531                         && $wgRequest->getText( 'uselang', false ) === false;
1532         }
1533
1534         /**
1535          * Check if the request has a cache-varying cookie header
1536          * If it does, it's very important that we don't allow public caching
1537          *
1538          * @return Boolean
1539          */
1540         function haveCacheVaryCookies() {
1541                 global $wgRequest;
1542                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
1543                 if ( $cookieHeader === false ) {
1544                         return false;
1545                 }
1546                 $cvCookies = $this->getCacheVaryCookies();
1547                 foreach ( $cvCookies as $cookieName ) {
1548                         # Check for a simple string match, like the way squid does it
1549                         if ( strpos( $cookieHeader, $cookieName ) !== false ) {
1550                                 wfDebug( __METHOD__ . ": found $cookieName\n" );
1551                                 return true;
1552                         }
1553                 }
1554                 wfDebug( __METHOD__ . ": no cache-varying cookies found\n" );
1555                 return false;
1556         }
1557
1558         /**
1559          * Add an HTTP header that will influence on the cache
1560          *
1561          * @param $header String: header name
1562          * @param $option Array|null
1563          * @fixme Document the $option parameter; it appears to be for
1564          *        X-Vary-Options but what format is acceptable?
1565          */
1566         public function addVaryHeader( $header, $option = null ) {
1567                 if ( !array_key_exists( $header, $this->mVaryHeader ) ) {
1568                         $this->mVaryHeader[$header] = (array)$option;
1569                 } elseif( is_array( $option ) ) {
1570                         if( is_array( $this->mVaryHeader[$header] ) ) {
1571                                 $this->mVaryHeader[$header] = array_merge( $this->mVaryHeader[$header], $option );
1572                         } else {
1573                                 $this->mVaryHeader[$header] = $option;
1574                         }
1575                 }
1576                 $this->mVaryHeader[$header] = array_unique( $this->mVaryHeader[$header] );
1577         }
1578
1579         /**
1580          * Get a complete X-Vary-Options header
1581          *
1582          * @return String
1583          */
1584         public function getXVO() {
1585                 $cvCookies = $this->getCacheVaryCookies();
1586
1587                 $cookiesOption = array();
1588                 foreach ( $cvCookies as $cookieName ) {
1589                         $cookiesOption[] = 'string-contains=' . $cookieName;
1590                 }
1591                 $this->addVaryHeader( 'Cookie', $cookiesOption );
1592
1593                 $headers = array();
1594                 foreach( $this->mVaryHeader as $header => $option ) {
1595                         $newheader = $header;
1596                         if( is_array( $option ) ) {
1597                                 $newheader .= ';' . implode( ';', $option );
1598                         }
1599                         $headers[] = $newheader;
1600                 }
1601                 $xvo = 'X-Vary-Options: ' . implode( ',', $headers );
1602
1603                 return $xvo;
1604         }
1605
1606         /**
1607          * bug 21672: Add Accept-Language to Vary and XVO headers
1608          * if there's no 'variant' parameter existed in GET.
1609          *
1610          * For example:
1611          *   /w/index.php?title=Main_page should always be served; but
1612          *   /w/index.php?title=Main_page&variant=zh-cn should never be served.
1613          */
1614         function addAcceptLanguage() {
1615                 global $wgRequest, $wgContLang;
1616                 if( !$wgRequest->getCheck( 'variant' ) && $wgContLang->hasVariants() ) {
1617                         $variants = $wgContLang->getVariants();
1618                         $aloption = array();
1619                         foreach ( $variants as $variant ) {
1620                                 if( $variant === $wgContLang->getCode() ) {
1621                                         continue;
1622                                 } else {
1623                                         $aloption[] = 'string-contains=' . $variant;
1624
1625                                         // IE and some other browsers use another form of language code
1626                                         // in their Accept-Language header, like "zh-CN" or "zh-TW".
1627                                         // We should handle these too.
1628                                         $ievariant = explode( '-', $variant );
1629                                         if ( count( $ievariant ) == 2 ) {
1630                                                 $ievariant[1] = strtoupper( $ievariant[1] );
1631                                                 $ievariant = implode( '-', $ievariant );
1632                                                 $aloption[] = 'string-contains=' . $ievariant;
1633                                         }
1634                                 }
1635                         }
1636                         $this->addVaryHeader( 'Accept-Language', $aloption );
1637                 }
1638         }
1639
1640         /**
1641          * Set a flag which will cause an X-Frame-Options header appropriate for
1642          * edit pages to be sent. The header value is controlled by
1643          * $wgEditPageFrameOptions.
1644          *
1645          * This is the default for special pages. If you display a CSRF-protected
1646          * form on an ordinary view page, then you need to call this function.
1647          */
1648         public function preventClickjacking( $enable = true ) {
1649                 $this->mPreventClickjacking = $enable;
1650         }
1651
1652         /**
1653          * Turn off frame-breaking. Alias for $this->preventClickjacking(false).
1654          * This can be called from pages which do not contain any CSRF-protected
1655          * HTML form.
1656          */
1657         public function allowClickjacking() {
1658                 $this->mPreventClickjacking = false;
1659         }
1660
1661         /**
1662          * Get the X-Frame-Options header value (without the name part), or false
1663          * if there isn't one. This is used by Skin to determine whether to enable
1664          * JavaScript frame-breaking, for clients that don't support X-Frame-Options.
1665          */
1666         public function getFrameOptions() {
1667                 global $wgBreakFrames, $wgEditPageFrameOptions;
1668                 if ( $wgBreakFrames ) {
1669                         return 'DENY';
1670                 } elseif ( $this->mPreventClickjacking && $wgEditPageFrameOptions ) {
1671                         return $wgEditPageFrameOptions;
1672                 }
1673         }
1674
1675         /**
1676          * Send cache control HTTP headers
1677          */
1678         public function sendCacheControl() {
1679                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest, $wgUseXVO;
1680
1681                 $response = $wgRequest->response();
1682                 if ( $wgUseETag && $this->mETag ) {
1683                         $response->header( "ETag: $this->mETag" );
1684                 }
1685
1686                 $this->addAcceptLanguage();
1687
1688                 # don't serve compressed data to clients who can't handle it
1689                 # maintain different caches for logged-in users and non-logged in ones
1690                 $response->header( 'Vary: ' . join( ', ', array_keys( $this->mVaryHeader ) ) );
1691
1692                 if ( $wgUseXVO ) {
1693                         # Add an X-Vary-Options header for Squid with Wikimedia patches
1694                         $response->header( $this->getXVO() );
1695                 }
1696
1697                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
1698                         if(
1699                                 $wgUseSquid && session_id() == '' && !$this->isPrintable() &&
1700                                 $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies()
1701                         )
1702                         {
1703                                 if ( $wgUseESI ) {
1704                                         # We'll purge the proxy cache explicitly, but require end user agents
1705                                         # to revalidate against the proxy on each visit.
1706                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
1707                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
1708                                         # start with a shorter timeout for initial testing
1709                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
1710                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
1711                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
1712                                 } else {
1713                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
1714                                         # to revalidate against the proxy on each visit.
1715                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
1716                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
1717                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
1718                                         # start with a shorter timeout for initial testing
1719                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
1720                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
1721                                 }
1722                         } else {
1723                                 # We do want clients to cache if they can, but they *must* check for updates
1724                                 # on revisiting the page.
1725                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
1726                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1727                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
1728                         }
1729                         if($this->mLastModified) {
1730                                 $response->header( "Last-Modified: {$this->mLastModified}" );
1731                         }
1732                 } else {
1733                         wfDebug( __METHOD__ . ": no caching **\n", false );
1734
1735                         # In general, the absence of a last modified header should be enough to prevent
1736                         # the client from using its cache. We send a few other things just to make sure.
1737                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1738                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
1739                         $response->header( 'Pragma: no-cache' );
1740                 }
1741         }
1742
1743         /**
1744          * Get the message associed with the HTTP response code $code
1745          *
1746          * @param $code Integer: status code
1747          * @return String or null: message or null if $code is not in the list of
1748          *         messages
1749          */
1750         public static function getStatusMessage( $code ) {
1751                 static $statusMessage = array(
1752                         100 => 'Continue',
1753                         101 => 'Switching Protocols',
1754                         102 => 'Processing',
1755                         200 => 'OK',
1756                         201 => 'Created',
1757                         202 => 'Accepted',
1758                         203 => 'Non-Authoritative Information',
1759                         204 => 'No Content',
1760                         205 => 'Reset Content',
1761                         206 => 'Partial Content',
1762                         207 => 'Multi-Status',
1763                         300 => 'Multiple Choices',
1764                         301 => 'Moved Permanently',
1765                         302 => 'Found',
1766                         303 => 'See Other',
1767                         304 => 'Not Modified',
1768                         305 => 'Use Proxy',
1769                         307 => 'Temporary Redirect',
1770                         400 => 'Bad Request',
1771                         401 => 'Unauthorized',
1772                         402 => 'Payment Required',
1773                         403 => 'Forbidden',
1774                         404 => 'Not Found',
1775                         405 => 'Method Not Allowed',
1776                         406 => 'Not Acceptable',
1777                         407 => 'Proxy Authentication Required',
1778                         408 => 'Request Timeout',
1779                         409 => 'Conflict',
1780                         410 => 'Gone',
1781                         411 => 'Length Required',
1782                         412 => 'Precondition Failed',
1783                         413 => 'Request Entity Too Large',
1784                         414 => 'Request-URI Too Large',
1785                         415 => 'Unsupported Media Type',
1786                         416 => 'Request Range Not Satisfiable',
1787                         417 => 'Expectation Failed',
1788                         422 => 'Unprocessable Entity',
1789                         423 => 'Locked',
1790                         424 => 'Failed Dependency',
1791                         500 => 'Internal Server Error',
1792                         501 => 'Not Implemented',
1793                         502 => 'Bad Gateway',
1794                         503 => 'Service Unavailable',
1795                         504 => 'Gateway Timeout',
1796                         505 => 'HTTP Version Not Supported',
1797                         507 => 'Insufficient Storage'
1798                 );
1799                 return isset( $statusMessage[$code] ) ? $statusMessage[$code] : null;
1800         }
1801
1802         /**
1803          * Finally, all the text has been munged and accumulated into
1804          * the object, let's actually output it:
1805          */
1806         public function output() {
1807                 global $wgOutputEncoding, $wgRequest;
1808                 global $wgLanguageCode, $wgDebugRedirects, $wgMimeType;
1809
1810                 if( $this->mDoNothing ) {
1811                         return;
1812                 }
1813
1814                 wfProfileIn( __METHOD__ );
1815
1816                 $response = $wgRequest->response();
1817
1818                 if ( $this->mRedirect != '' ) {
1819                         # Standards require redirect URLs to be absolute
1820                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
1821                         if( $this->mRedirectCode == '301' || $this->mRedirectCode == '303' ) {
1822                                 if( !$wgDebugRedirects ) {
1823                                         $message = self::getStatusMessage( $this->mRedirectCode );
1824                                         $response->header( "HTTP/1.1 {$this->mRedirectCode} $message" );
1825                                 }
1826                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
1827                         }
1828                         $this->sendCacheControl();
1829
1830                         $response->header( "Content-Type: text/html; charset=utf-8" );
1831                         if( $wgDebugRedirects ) {
1832                                 $url = htmlspecialchars( $this->mRedirect );
1833                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
1834                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
1835                                 print "</body>\n</html>\n";
1836                         } else {
1837                                 $response->header( 'Location: ' . $this->mRedirect );
1838                         }
1839                         wfProfileOut( __METHOD__ );
1840                         return;
1841                 } elseif ( $this->mStatusCode ) {
1842                         $message = self::getStatusMessage( $this->mStatusCode );
1843                         if ( $message ) {
1844                                 $response->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $message );
1845                         }
1846                 }
1847
1848                 # Buffer output; final headers may depend on later processing
1849                 ob_start();
1850
1851                 $response->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1852                 $response->header( 'Content-language: ' . $wgLanguageCode );
1853
1854                 // Prevent framing, if requested
1855                 $frameOptions = $this->getFrameOptions();
1856                 if ( $frameOptions ) {
1857                         $response->header( "X-Frame-Options: $frameOptions" );
1858                 }
1859
1860                 if ( $this->mArticleBodyOnly ) {
1861                         $this->out( $this->mBodytext );
1862                 } else {
1863                         $this->addDefaultModules();
1864
1865                         $sk = $this->getSkin( $this->getTitle() );
1866
1867                         // Hook that allows last minute changes to the output page, e.g.
1868                         // adding of CSS or Javascript by extensions.
1869                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1870
1871                         wfProfileIn( 'Output-skin' );
1872                         $sk->outputPage( $this );
1873                         wfProfileOut( 'Output-skin' );
1874                 }
1875
1876                 $this->sendCacheControl();
1877                 ob_end_flush();
1878                 wfProfileOut( __METHOD__ );
1879         }
1880
1881         /**
1882          * Actually output something with print(). Performs an iconv to the
1883          * output encoding, if needed.
1884          *
1885          * @param $ins String: the string to output
1886          */
1887         public function out( $ins ) {
1888                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1889                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1890                         $outs = $ins;
1891                 } else {
1892                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1893                         if ( false === $outs ) {
1894                                 $outs = $ins;
1895                         }
1896                 }
1897                 print $outs;
1898         }
1899
1900         /**
1901          * Produce a "user is blocked" page.
1902          *
1903          * @param $return Boolean: whether to have a "return to $wgTitle" message or not.
1904          * @return nothing
1905          */
1906         function blockedPage( $return = true ) {
1907                 global $wgContLang, $wgLang;
1908
1909                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1910                 $this->setRobotPolicy( 'noindex,nofollow' );
1911                 $this->setArticleRelated( false );
1912
1913                 $name = $this->getUser()->blockedBy();
1914                 $reason = $this->getUser()->blockedFor();
1915                 if( $reason == '' ) {
1916                         $reason = wfMsg( 'blockednoreason' );
1917                 }
1918                 $blockTimestamp = $wgLang->timeanddate(
1919                         wfTimestamp( TS_MW, $this->getUser()->mBlock->mTimestamp ), true
1920                 );
1921                 $ip = wfGetIP();
1922
1923                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1924
1925                 $blockid = $this->getUser()->mBlock->getId();
1926
1927                 $blockExpiry = $wgLang->formatExpiry( $this->getUser()->mBlock->mExpiry );
1928
1929                 if ( $this->getUser()->mBlock->mAuto ) {
1930                         $msg = 'autoblockedtext';
1931                 } else {
1932                         $msg = 'blockedtext';
1933                 }
1934
1935                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1936                  * This could be a username, an IP range, or a single IP. */
1937                 $intended = $this->getUser()->mBlock->getTarget();
1938
1939                 $this->addWikiMsg(
1940                         $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry,
1941                         $intended, $blockTimestamp
1942                 );
1943
1944                 # Don't auto-return to special pages
1945                 if( $return ) {
1946                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1947                         $this->returnToMain( null, $return );
1948                 }
1949         }
1950
1951         /**
1952          * Output a standard error page
1953          *
1954          * @param $title String: message key for page title
1955          * @param $msg String: message key for page text
1956          * @param $params Array: message parameters
1957          */
1958         public function showErrorPage( $title, $msg, $params = array() ) {
1959                 if ( $this->getTitle() ) {
1960                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1961                 }
1962                 $this->setPageTitle( wfMsg( $title ) );
1963                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1964                 $this->setRobotPolicy( 'noindex,nofollow' );
1965                 $this->setArticleRelated( false );
1966                 $this->enableClientCache( false );
1967                 $this->mRedirect = '';
1968                 $this->mBodytext = '';
1969
1970                 $this->addWikiMsgArray( $msg, $params );
1971
1972                 $this->returnToMain();
1973         }
1974
1975         /**
1976          * Output a standard permission error page
1977          *
1978          * @param $errors Array: error message keys
1979          * @param $action String: action that was denied or null if unknown
1980          */
1981         public function showPermissionsErrorPage( $errors, $action = null ) {
1982                 $this->mDebugtext .= 'Original title: ' .
1983                 $this->getTitle()->getPrefixedText() . "\n";
1984                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1985                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1986                 $this->setRobotPolicy( 'noindex,nofollow' );
1987                 $this->setArticleRelated( false );
1988                 $this->enableClientCache( false );
1989                 $this->mRedirect = '';
1990                 $this->mBodytext = '';
1991                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1992         }
1993
1994         /**
1995          * Display an error page indicating that a given version of MediaWiki is
1996          * required to use it
1997          *
1998          * @param $version Mixed: the version of MediaWiki needed to use the page
1999          */
2000         public function versionRequired( $version ) {
2001                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
2002                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
2003                 $this->setRobotPolicy( 'noindex,nofollow' );
2004                 $this->setArticleRelated( false );
2005                 $this->mBodytext = '';
2006
2007                 $this->addWikiMsg( 'versionrequiredtext', $version );
2008                 $this->returnToMain();
2009         }
2010
2011         /**
2012          * Display an error page noting that a given permission bit is required.
2013          *
2014          * @param $permission String: key required
2015          */
2016         public function permissionRequired( $permission ) {
2017                 global $wgLang;
2018
2019                 $this->setPageTitle( wfMsg( 'badaccess' ) );
2020                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
2021                 $this->setRobotPolicy( 'noindex,nofollow' );
2022                 $this->setArticleRelated( false );
2023                 $this->mBodytext = '';
2024
2025                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
2026                         User::getGroupsWithPermission( $permission ) );
2027                 if( $groups ) {
2028                         $this->addWikiMsg(
2029                                 'badaccess-groups',
2030                                 $wgLang->commaList( $groups ),
2031                                 count( $groups )
2032                         );
2033                 } else {
2034                         $this->addWikiMsg( 'badaccess-group0' );
2035                 }
2036                 $this->returnToMain();
2037         }
2038
2039         /**
2040          * Produce the stock "please login to use the wiki" page
2041          */
2042         public function loginToUse() {
2043                 if( $this->getUser()->isLoggedIn() ) {
2044                         $this->permissionRequired( 'read' );
2045                         return;
2046                 }
2047
2048                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
2049                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
2050                 $this->setRobotPolicy( 'noindex,nofollow' );
2051                 $this->setArticleRelated( false );
2052
2053                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
2054                 $loginLink = $this->getSkin()->link(
2055                         $loginTitle,
2056                         wfMsgHtml( 'loginreqlink' ),
2057                         array(),
2058                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
2059                         array( 'known', 'noclasses' )
2060                 );
2061                 $this->addWikiMsgArray( 'loginreqpagetext', array( $loginLink ), array( 'replaceafter' ) );
2062                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . '-->' );
2063
2064                 # Don't return to the main page if the user can't read it
2065                 # otherwise we'll end up in a pointless loop
2066                 $mainPage = Title::newMainPage();
2067                 if( $mainPage->userCanRead() ) {
2068                         $this->returnToMain( null, $mainPage );
2069                 }
2070         }
2071
2072         /**
2073          * Format a list of error messages
2074          *
2075          * @param $errors Array of arrays returned by Title::getUserPermissionsErrors
2076          * @param $action String: action that was denied or null if unknown
2077          * @return String: the wikitext error-messages, formatted into a list.
2078          */
2079         public function formatPermissionsErrorMessage( $errors, $action = null ) {
2080                 if ( $action == null ) {
2081                         $text = wfMsgNoTrans( 'permissionserrorstext', count( $errors ) ) . "\n\n";
2082                 } else {
2083                         $action_desc = wfMsgNoTrans( "action-$action" );
2084                         $text = wfMsgNoTrans(
2085                                 'permissionserrorstext-withaction',
2086                                 count( $errors ),
2087                                 $action_desc
2088                         ) . "\n\n";
2089                 }
2090
2091                 if ( count( $errors ) > 1 ) {
2092                         $text .= '<ul class="permissions-errors">' . "\n";
2093
2094                         foreach( $errors as $error ) {
2095                                 $text .= '<li>';
2096                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
2097                                 $text .= "</li>\n";
2098                         }
2099                         $text .= '</ul>';
2100                 } else {
2101                         $text .= "<div class=\"permissions-errors\">\n" .
2102                                         call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) .
2103                                         "\n</div>";
2104                 }
2105
2106                 return $text;
2107         }
2108
2109         /**
2110          * Display a page stating that the Wiki is in read-only mode,
2111          * and optionally show the source of the page that the user
2112          * was trying to edit.  Should only be called (for this
2113          * purpose) after wfReadOnly() has returned true.
2114          *
2115          * For historical reasons, this function is _also_ used to
2116          * show the error message when a user tries to edit a page
2117          * they are not allowed to edit.  (Unless it's because they're
2118          * blocked, then we show blockedPage() instead.)  In this
2119          * case, the second parameter should be set to true and a list
2120          * of reasons supplied as the third parameter.
2121          *
2122          * @todo Needs to be split into multiple functions.
2123          *
2124          * @param $source    String: source code to show (or null).
2125          * @param $protected Boolean: is this a permissions error?
2126          * @param $reasons   Array: list of reasons for this error, as returned by Title::getUserPermissionsErrors().
2127          * @param $action    String: action that was denied or null if unknown
2128          */
2129         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
2130                 $this->setRobotPolicy( 'noindex,nofollow' );
2131                 $this->setArticleRelated( false );
2132
2133                 // If no reason is given, just supply a default "I can't let you do
2134                 // that, Dave" message.  Should only occur if called by legacy code.
2135                 if ( $protected && empty( $reasons ) ) {
2136                         $reasons[] = array( 'badaccess-group0' );
2137                 }
2138
2139                 if ( !empty( $reasons ) ) {
2140                         // Permissions error
2141                         if( $source ) {
2142                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
2143                                 $this->setSubtitle(
2144                                         wfMsg( 'viewsourcefor', $this->getSkin()->linkKnown( $this->getTitle() ) )
2145                                 );
2146                         } else {
2147                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
2148                         }
2149                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
2150                 } else {
2151                         // Wiki is read only
2152                         $this->setPageTitle( wfMsg( 'readonly' ) );
2153                         $reason = wfReadOnlyReason();
2154                         $this->wrapWikiMsg( "<div class='mw-readonly-error'>\n$1\n</div>", array( 'readonlytext', $reason ) );
2155                 }
2156
2157                 // Show source, if supplied
2158                 if( is_string( $source ) ) {
2159                         $this->addWikiMsg( 'viewsourcetext' );
2160
2161                         $params = array(
2162                                 'id'   => 'wpTextbox1',
2163                                 'name' => 'wpTextbox1',
2164                                 'cols' => $this->getUser()->getOption( 'cols' ),
2165                                 'rows' => $this->getUser()->getOption( 'rows' ),
2166                                 'readonly' => 'readonly'
2167                         );
2168                         $this->addHTML( Html::element( 'textarea', $params, $source ) );
2169
2170                         // Show templates used by this article
2171                         $skin = $this->getSkin();
2172                         $article = new Article( $this->getTitle() );
2173                         $this->addHTML( "<div class='templatesUsed'>
2174 {$skin->formatTemplates( $article->getUsedTemplates() )}
2175 </div>
2176 " );
2177                 }
2178
2179                 # If the title doesn't exist, it's fairly pointless to print a return
2180                 # link to it.  After all, you just tried editing it and couldn't, so
2181                 # what's there to do there?
2182                 if( $this->getTitle()->exists() ) {
2183                         $this->returnToMain( null, $this->getTitle() );
2184                 }
2185         }
2186
2187         /**
2188          * Adds JS-based password security checker
2189          * @param $passwordId String ID of input box containing password
2190          * @param $retypeId String ID of input box containing retyped password
2191          * @return none
2192          */
2193         public function addPasswordSecurity( $passwordId, $retypeId ) {
2194                 $data = array(
2195                         'password' => '#' . $passwordId,
2196                         'retype' => '#' . $retypeId,
2197                         'messages' => array(),
2198                 );
2199                 foreach ( array( 'password-strength', 'password-strength-bad', 'password-strength-mediocre',
2200                                 'password-strength-acceptable', 'password-strength-good', 'password-retype', 'password-retype-mismatch'
2201                         ) as $message ) {
2202                         $data['messages'][$message] = wfMsg( $message );
2203                 }
2204                 $this->addScript( Html::inlineScript( 'var passwordSecurity=' . FormatJson::encode( $data ) ) );
2205                 $this->addModules( 'mediawiki.legacy.password' );
2206         }
2207
2208         public function showFatalError( $message ) {
2209                 $this->setPageTitle( wfMsg( 'internalerror' ) );
2210                 $this->setRobotPolicy( 'noindex,nofollow' );
2211                 $this->setArticleRelated( false );
2212                 $this->enableClientCache( false );
2213                 $this->mRedirect = '';
2214                 $this->mBodytext = $message;
2215         }
2216
2217         public function showUnexpectedValueError( $name, $val ) {
2218                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
2219         }
2220
2221         public function showFileCopyError( $old, $new ) {
2222                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
2223         }
2224
2225         public function showFileRenameError( $old, $new ) {
2226                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
2227         }
2228
2229         public function showFileDeleteError( $name ) {
2230                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
2231         }
2232
2233         public function showFileNotFoundError( $name ) {
2234                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
2235         }
2236
2237         /**
2238          * Add a "return to" link pointing to a specified title
2239          *
2240          * @param $title Title to link
2241          * @param $query String: query string
2242          * @param $text String text of the link (input is not escaped)
2243          */
2244         public function addReturnTo( $title, $query = array(), $text = null ) {
2245                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullURL() ) );
2246                 $link = wfMsgHtml(
2247                         'returnto',
2248                         $this->getSkin()->link( $title, $text, array(), $query )
2249                 );
2250                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
2251         }
2252
2253         /**
2254          * Add a "return to" link pointing to a specified title,
2255          * or the title indicated in the request, or else the main page
2256          *
2257          * @param $unused No longer used
2258          * @param $returnto Title or String to return to
2259          * @param $returntoquery String: query string for the return to link
2260          */
2261         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
2262                 global $wgRequest;
2263
2264                 if ( $returnto == null ) {
2265                         $returnto = $wgRequest->getText( 'returnto' );
2266                 }
2267
2268                 if ( $returntoquery == null ) {
2269                         $returntoquery = $wgRequest->getText( 'returntoquery' );
2270                 }
2271
2272                 if ( $returnto === '' ) {
2273                         $returnto = Title::newMainPage();
2274                 }
2275
2276                 if ( is_object( $returnto ) ) {
2277                         $titleObj = $returnto;
2278                 } else {
2279                         $titleObj = Title::newFromText( $returnto );
2280                 }
2281                 if ( !is_object( $titleObj ) ) {
2282                         $titleObj = Title::newMainPage();
2283                 }
2284
2285                 $this->addReturnTo( $titleObj, $returntoquery );
2286         }
2287
2288         /**
2289          * @param $sk Skin The given Skin
2290          * @param $includeStyle Boolean: unused
2291          * @return String: The doctype, opening <html>, and head element.
2292          */
2293         public function headElement( Skin $sk, $includeStyle = true ) {
2294                 global $wgOutputEncoding, $wgMimeType;
2295                 global $wgUseTrackbacks, $wgHtml5;
2296                 global $wgRequest, $wgLang;
2297
2298                 if ( $sk->commonPrintStylesheet() ) {
2299                         $this->addModuleStyles( 'mediawiki.legacy.wikiprintable' );
2300                 }
2301                 $sk->setupUserCss( $this );
2302
2303                 $lang = wfUILang();
2304                 $ret = Html::htmlHeader( array( 'lang' => $lang->getCode(), 'dir' => $lang->getDir() ) );
2305
2306                 if ( $this->getHTMLTitle() == '' ) {
2307                         $this->setHTMLTitle( wfMsg( 'pagetitle', $this->getPageTitle() ) );
2308                 }
2309
2310                 $openHead = Html::openElement( 'head' );
2311                 if ( $openHead ) {
2312                         # Don't bother with the newline if $head == ''
2313                         $ret .= "$openHead\n";
2314                 }
2315
2316                 $ret .= Html::element( 'title', null, $this->getHTMLTitle() ) . "\n";
2317
2318                 $ret .= implode( "\n", array(
2319                         $this->getHeadLinks( $sk, true ),
2320                         $this->buildCssLinks( $sk ),
2321                         $this->getHeadItems()
2322                 ) );
2323
2324                 if ( $wgUseTrackbacks && $this->isArticleRelated() ) {
2325                         $ret .= $this->getTitle()->trackbackRDF();
2326                 }
2327
2328                 $closeHead = Html::closeElement( 'head' );
2329                 if ( $closeHead ) {
2330                         $ret .= "$closeHead\n";
2331                 }
2332
2333                 $bodyAttrs = array();
2334
2335                 # Crazy edit-on-double-click stuff
2336                 $action = $wgRequest->getVal( 'action', 'view' );
2337
2338                 if (
2339                         $this->getTitle()->getNamespace() != NS_SPECIAL &&
2340                         in_array( $action, array( 'view', 'purge' ) ) &&
2341                         $this->getUser()->getOption( 'editondblclick' )
2342                 )
2343                 {
2344                         $bodyAttrs['ondblclick'] = "document.location = '" . Xml::escapeJsString( $this->getTitle()->getEditURL() ) . "'";
2345                 }
2346
2347                 # Class bloat
2348                 $dir = wfUILang()->getDir();
2349                 $bodyAttrs['class'] = "mediawiki $dir";
2350
2351                 if ( $wgLang->capitalizeAllNouns() ) {
2352                         # A <body> class is probably not the best way to do this . . .
2353                         $bodyAttrs['class'] .= ' capitalize-all-nouns';
2354                 }
2355                 $bodyAttrs['class'] .= ' ' . $sk->getPageClasses( $this->getTitle() );
2356                 $bodyAttrs['class'] .= ' skin-' . Sanitizer::escapeClass( $sk->getSkinName() );
2357
2358                 $sk->addToBodyAttributes( $this, $bodyAttrs ); // Allow skins to add body attributes they need
2359                 wfRunHooks( 'OutputPageBodyAttributes', array( $this, $sk, &$bodyAttrs ) );
2360
2361                 $ret .= Html::openElement( 'body', $bodyAttrs ) . "\n";
2362
2363                 return $ret;
2364         }
2365
2366         /**
2367          * Add the default ResourceLoader modules to this object
2368          */
2369         private function addDefaultModules() {
2370                 global $wgIncludeLegacyJavaScript,
2371                         $wgUseAjax, $wgAjaxWatch, $wgEnableMWSuggest;
2372
2373                 // Add base resources
2374                 $this->addModules( 'mediawiki.util' );
2375                 if( $wgIncludeLegacyJavaScript ){
2376                         $this->addModules( 'mediawiki.legacy.wikibits' );
2377                 }
2378
2379                 // Add various resources if required
2380                 if ( $wgUseAjax ) {
2381                         $this->addModules( 'mediawiki.legacy.ajax' );
2382
2383                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
2384
2385                         if( $wgAjaxWatch && $this->getUser()->isLoggedIn() ) {
2386                                 $this->addModules( 'mediawiki.action.watch.ajax' );
2387                         }
2388
2389                         if ( $wgEnableMWSuggest && !$this->getUser()->getOption( 'disablesuggest', false ) ) {
2390                                 $this->addModules( 'mediawiki.legacy.mwsuggest' );
2391                         }
2392                 }
2393
2394                 if( $this->getUser()->getBoolOption( 'editsectiononrightclick' ) ) {
2395                         $this->addModules( 'mediawiki.action.view.rightClickEdit' );
2396                 }
2397         }
2398
2399         /**
2400          * Get a ResourceLoader object associated with this OutputPage
2401          *
2402          * @return ResourceLoader
2403          */
2404         public function getResourceLoader() {
2405                 if ( is_null( $this->mResourceLoader ) ) {
2406                         $this->mResourceLoader = new ResourceLoader();
2407                 }
2408                 return $this->mResourceLoader;
2409         }
2410
2411         /**
2412          * TODO: Document
2413          * @param $skin Skin
2414          * @param $modules Array/string with the module name
2415          * @param $only String ResourceLoaderModule TYPE_ class constant
2416          * @param $useESI boolean
2417          * @return string html <script> and <style> tags
2418          */
2419         protected function makeResourceLoaderLink( Skin $skin, $modules, $only, $useESI = false ) {
2420                 global $wgLang, $wgLoadScript, $wgResourceLoaderUseESI,
2421                         $wgResourceLoaderInlinePrivateModules, $wgRequest;
2422                 // Lazy-load ResourceLoader
2423                 // TODO: Should this be a static function of ResourceLoader instead?
2424                 // TODO: Divide off modules starting with "user", and add the user parameter to them
2425                 $baseQuery = array(
2426                         'lang' => $wgLang->getCode(),
2427                         'debug' => ResourceLoader::inDebugMode() ? 'true' : 'false',
2428                         'skin' => $skin->getSkinName(),
2429                         'only' => $only,
2430                 );
2431                 // Propagate printable and handheld parameters if present
2432                 if ( $this->isPrintable() ) {
2433                         $baseQuery['printable'] = 1;
2434                 }
2435                 if ( $wgRequest->getBool( 'handheld' ) ) {
2436                         $baseQuery['handheld'] = 1;
2437                 }
2438
2439                 if ( !count( $modules ) ) {
2440                         return '';
2441                 }
2442
2443                 if ( count( $modules ) > 1 ) {
2444                         // Remove duplicate module requests
2445                         $modules = array_unique( (array) $modules );
2446                         // Sort module names so requests are more uniform
2447                         sort( $modules );
2448
2449                         if ( ResourceLoader::inDebugMode() ) {
2450                                 // Recursively call us for every item
2451                                 $links = '';
2452                                 foreach ( $modules as $name ) {
2453                                         $links .= $this->makeResourceLoaderLink( $skin, $name, $only, $useESI );
2454                                 }
2455                                 return $links;
2456                         }
2457                 }
2458
2459                 // Create keyed-by-group list of module objects from modules list
2460                 $groups = array();
2461                 $resourceLoader = $this->getResourceLoader();
2462                 foreach ( (array) $modules as $name ) {
2463                         $module = $resourceLoader->getModule( $name );
2464                         # Check that we're allowed to include this module on this page
2465                         if ( ( $module->getOrigin() > $this->getAllowedModules( ResourceLoaderModule::TYPE_SCRIPTS )
2466                                         && $only == ResourceLoaderModule::TYPE_SCRIPTS )
2467                                 || ( $module->getOrigin() > $this->getAllowedModules( ResourceLoaderModule::TYPE_STYLES )
2468                                         && $only == ResourceLoaderModule::TYPE_STYLES )
2469                                 )
2470                         {
2471                                 continue;
2472                         }
2473
2474                         $group = $module->getGroup();
2475                         if ( !isset( $groups[$group] ) ) {
2476                                 $groups[$group] = array();
2477                         }
2478                         $groups[$group][$name] = $module;
2479                 }
2480
2481                 $links = '';
2482                 foreach ( $groups as $group => $modules ) {
2483                         $query = $baseQuery;
2484                         // Special handling for user-specific groups
2485                         if ( ( $group === 'user' || $group === 'private' ) && $this->getUser()->isLoggedIn() ) {
2486                                 $query['user'] = $this->getUser()->getName();
2487                         }
2488
2489                         // Create a fake request based on the one we are about to make so modules return
2490                         // correct timestamp and emptiness data
2491                         $context = new ResourceLoaderContext( $resourceLoader, new FauxRequest( $query ) );
2492                         // Drop modules that know they're empty
2493                         foreach ( $modules as $key => $module ) {
2494                                 if ( $module->isKnownEmpty( $context ) ) {
2495                                         unset( $modules[$key] );
2496                                 }
2497                         }
2498                         // If there are no modules left, skip this group
2499                         if ( $modules === array() ) {
2500                                 continue;
2501                         }
2502
2503                         $query['modules'] = implode( '|', array_keys( $modules ) );
2504
2505                         // Support inlining of private modules if configured as such
2506                         if ( $group === 'private' && $wgResourceLoaderInlinePrivateModules ) {
2507                                 if ( $only == ResourceLoaderModule::TYPE_STYLES ) {
2508                                         $links .= Html::inlineStyle(
2509                                                 $resourceLoader->makeModuleResponse( $context, $modules )
2510                                         );
2511                                 } else {
2512                                         $links .= Html::inlineScript(
2513                                                 ResourceLoader::makeLoaderConditionalScript(
2514                                                         $resourceLoader->makeModuleResponse( $context, $modules )
2515                                                 )
2516                                         );
2517                                 }
2518                                 continue;
2519                         }
2520                         // Special handling for the user group; because users might change their stuff
2521                         // on-wiki like user pages, or user preferences; we need to find the highest
2522                         // timestamp of these user-changable modules so we can ensure cache misses on change
2523                         // This should NOT be done for the site group (bug 27564) because anons get that too
2524                         // and we shouldn't be putting timestamps in Squid-cached HTML
2525                         if ( $group === 'user' ) {
2526                                 // Get the maximum timestamp
2527                                 $timestamp = 1;
2528                                 foreach ( $modules as $module ) {
2529                                         $timestamp = max( $timestamp, $module->getModifiedTime( $context ) );
2530                                 }
2531                                 // Add a version parameter so cache will break when things change
2532                                 $query['version'] = wfTimestamp( TS_ISO_8601_BASIC, $timestamp );
2533                         }
2534                         // Make queries uniform in order
2535                         ksort( $query );
2536
2537                         $url = wfAppendQuery( $wgLoadScript, $query );
2538                         if ( $useESI && $wgResourceLoaderUseESI ) {
2539                                 $esi = Xml::element( 'esi:include', array( 'src' => $url ) );
2540                                 if ( $only == ResourceLoaderModule::TYPE_STYLES ) {
2541                                         $link = Html::inlineStyle( $esi );
2542                                 } else {
2543                                         $link = Html::inlineScript( $esi );
2544                                 }
2545                         } else {
2546                                 // Automatically select style/script elements
2547                                 if ( $only === ResourceLoaderModule::TYPE_STYLES ) {
2548                                         $link = Html::linkedStyle( wfAppendQuery( $wgLoadScript, $query ) );
2549                                 } else {
2550                                         $link = Html::linkedScript( wfAppendQuery( $wgLoadScript, $query ) );
2551                                 }
2552                         }
2553
2554                         if( $group == 'noscript' ){
2555                                 $links .= Html::rawElement( 'noscript', array(), $link ) . "\n";
2556                         } else {
2557                                 $links .= $link . "\n";
2558                         }
2559                 }
2560                 return $links;
2561         }
2562
2563         /**
2564          * Gets the global variables and mScripts; also adds userjs to the end if
2565          * enabled. Despite the name, these scripts are no longer put in the
2566          * <head> but at the bottom of the <body>
2567          *
2568          * @param $sk Skin object to use
2569          * @return String: HTML fragment
2570          */
2571         function getHeadScripts( Skin $sk ) {
2572                 global $wgRequest, $wgUseSiteJs, $wgAllowUserJs;
2573
2574                 // Startup - this will immediately load jquery and mediawiki modules
2575                 $scripts = $this->makeResourceLoaderLink( $sk, 'startup', ResourceLoaderModule::TYPE_SCRIPTS, true );
2576
2577                 // Script and Messages "only" requests
2578                 $scripts .= $this->makeResourceLoaderLink( $sk, $this->getModuleScripts( true ), ResourceLoaderModule::TYPE_SCRIPTS );
2579                 $scripts .= $this->makeResourceLoaderLink( $sk, $this->getModuleMessages( true ), ResourceLoaderModule::TYPE_MESSAGES );
2580
2581                 // Modules requests - let the client calculate dependencies and batch requests as it likes
2582                 $loader = '';
2583                 if ( $this->getModules( true ) ) {
2584                         $loader = Xml::encodeJsCall( 'mw.loader.load', array( $this->getModules( true ) ) ) .
2585                                 Xml::encodeJsCall( 'mw.loader.go', array() );
2586                 }
2587
2588                 $scripts .= Html::inlineScript(
2589                         ResourceLoader::makeLoaderConditionalScript(
2590                                 ResourceLoader::makeConfigSetScript( $this->getJSVars() ) . $loader
2591                         )
2592                 );
2593
2594                 // Legacy Scripts
2595                 $scripts .= "\n" . $this->mScripts;
2596
2597                 $userScripts = array( 'user.options' );
2598
2599                 // Add site JS if enabled
2600                 if ( $wgUseSiteJs ) {
2601                         $scripts .= $this->makeResourceLoaderLink( $sk, 'site', ResourceLoaderModule::TYPE_SCRIPTS );
2602                         if( $this->getUser()->isLoggedIn() ){
2603                                 $userScripts[] = 'user.groups';
2604                         }
2605                 }
2606
2607                 // Add user JS if enabled
2608                 if ( $wgAllowUserJs && $this->getUser()->isLoggedIn() ) {
2609                         $action = $wgRequest->getVal( 'action', 'view' );
2610                         if( $this->mTitle && $this->mTitle->isJsSubpage() && $sk->userCanPreview( $action ) ) {
2611                                 # XXX: additional security check/prompt?
2612                                 $scripts .= Html::inlineScript( "\n" . $wgRequest->getText( 'wpTextbox1' ) . "\n" ) . "\n";
2613                         } else {
2614                                 # FIXME: this means that User:Me/Common.js doesn't load when previewing
2615                                 # User:Me/Vector.js, and vice versa (bug26283)
2616                                 $userScripts[] = 'user';
2617                         }
2618                 }
2619                 $scripts .= $this->makeResourceLoaderLink( $sk, $userScripts, ResourceLoaderModule::TYPE_SCRIPTS );
2620
2621                 return $scripts;
2622         }
2623
2624         /**
2625          * Get an array containing global JS variables
2626          *
2627          * Do not add things here which can be evaluated in
2628          * ResourceLoaderStartupScript - in other words, without state.
2629          * You will only be adding bloat to the page and causing page caches to
2630          * have to be purged on configuration changes.
2631          */
2632         protected function getJSVars() {
2633                 global $wgRequest, $wgUseAjax, $wgEnableMWSuggest, $wgContLang;
2634
2635                 $title = $this->getTitle();
2636                 $ns = $title->getNamespace();
2637                 $nsname = MWNamespace::exists( $ns ) ? MWNamespace::getCanonicalName( $ns ) : $title->getNsText();
2638                 if ( $ns == NS_SPECIAL ) {
2639                         $parts = SpecialPage::resolveAliasWithSubpage( $title->getDBkey() );
2640                         $canonicalName = $parts[0];
2641                 } else {
2642                         $canonicalName = false; # bug 21115
2643                 }
2644
2645                 $vars = array(
2646                         'wgCanonicalNamespace' => $nsname,
2647                         'wgCanonicalSpecialPageName' => $canonicalName,
2648                         'wgNamespaceNumber' => $title->getNamespace(),
2649                         'wgPageName' => $title->getPrefixedDBKey(),
2650                         'wgTitle' => $title->getText(),
2651                         'wgCurRevisionId' => $title->getLatestRevID(),
2652                         'wgArticleId' => $title->getArticleId(),
2653                         'wgIsArticle' => $this->isArticle(),
2654                         'wgAction' => $wgRequest->getText( 'action', 'view' ),
2655                         'wgUserName' => $this->getUser()->isAnon() ? null : $this->getUser()->getName(),
2656                         'wgUserGroups' => $this->getUser()->getEffectiveGroups(),
2657                         'wgCategories' => $this->getCategories(),
2658                         'wgBreakFrames' => $this->getFrameOptions() == 'DENY',
2659                 );
2660                 if ( $wgContLang->hasVariants() ) {
2661                         $vars['wgUserVariant'] = $wgContLang->getPreferredVariant();
2662                 }
2663                 foreach ( $title->getRestrictionTypes() as $type ) {
2664                         $vars['wgRestriction' . ucfirst( $type )] = $title->getRestrictions( $type );
2665                 }
2666                 if ( $wgUseAjax && $wgEnableMWSuggest && !$this->getUser()->getOption( 'disablesuggest', false ) ) {
2667                         $vars['wgSearchNamespaces'] = SearchEngine::userNamespaces( $this->getUser() );
2668                 }
2669
2670                 // Allow extensions to add their custom variables to the global JS variables
2671                 wfRunHooks( 'MakeGlobalVariablesScript', array( &$vars ) );
2672
2673                 return $vars;
2674         }
2675
2676         /**
2677          * @return string HTML tag links to be put in the header.
2678          */
2679         public function getHeadLinks( Skin $sk, $addContentType = false ) {
2680                 global $wgUniversalEditButton, $wgFavicon, $wgAppleTouchIcon, $wgEnableAPI,
2681                         $wgSitename, $wgVersion, $wgHtml5, $wgMimeType, $wgOutputEncoding,
2682                         $wgFeed, $wgOverrideSiteFeed, $wgAdvertisedFeedTypes,
2683                         $wgEnableDublinCoreRdf, $wgEnableCreativeCommonsRdf,
2684                         $wgDisableLangConversion, $wgCanonicalLanguageLinks, $wgContLang,
2685                         $wgRightsPage, $wgRightsUrl;
2686
2687                 $tags = array();
2688
2689                 if ( $addContentType ) {
2690                         if ( $wgHtml5 ) {
2691                                 # More succinct than <meta http-equiv=Content-Type>, has the
2692                                 # same effect
2693                                 $tags[] = Html::element( 'meta', array( 'charset' => $wgOutputEncoding ) );
2694                         } else {
2695                                 $tags[] = Html::element( 'meta', array(
2696                                         'http-equiv' => 'Content-Type',
2697                                         'content' => "$wgMimeType; charset=$wgOutputEncoding"
2698                                 ) );
2699                                 $tags[] = Html::element( 'meta', array(  // bug 15835
2700                                         'http-equiv' => 'Content-Style-Type',
2701                                         'content' => 'text/css'
2702                                 ) );
2703                         }
2704                 }
2705
2706                 $tags[] = Html::element( 'meta', array(
2707                         'name' => 'generator',
2708                         'content' => "MediaWiki $wgVersion",
2709                 ) );
2710
2711                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
2712                 if( $p !== 'index,follow' ) {
2713                         // http://www.robotstxt.org/wc/meta-user.html
2714                         // Only show if it's different from the default robots policy
2715                         $tags[] = Html::element( 'meta', array(
2716                                 'name' => 'robots',
2717                                 'content' => $p,
2718                         ) );
2719                 }
2720
2721                 if ( count( $this->mKeywords ) > 0 ) {
2722                         $strip = array(
2723                                 "/<.*?" . ">/" => '',
2724                                 "/_/" => ' '
2725                         );
2726                         $tags[] = Html::element( 'meta', array(
2727                                 'name' => 'keywords',
2728                                 'content' =>  preg_replace(
2729                                         array_keys( $strip ),
2730                                         array_values( $strip ),
2731                                         implode( ',', $this->mKeywords )
2732                                 )
2733                         ) );
2734                 }
2735
2736                 foreach ( $this->mMetatags as $tag ) {
2737                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
2738                                 $a = 'http-equiv';
2739                                 $tag[0] = substr( $tag[0], 5 );
2740                         } else {
2741                                 $a = 'name';
2742                         }
2743                         $tags[] = Html::element( 'meta',
2744                                 array(
2745                                         $a => $tag[0],
2746                                         'content' => $tag[1]
2747                                 )
2748                         );
2749                 }
2750
2751                 foreach ( $this->mLinktags as $tag ) {
2752                         $tags[] = Html::element( 'link', $tag );
2753                 }
2754
2755                 # Universal edit button
2756                 if ( $wgUniversalEditButton ) {
2757                         if ( $this->isArticleRelated() && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
2758                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
2759                                 // Original UniversalEditButton
2760                                 $msg = wfMsg( 'edit' );
2761                                 $tags[] = Html::element( 'link', array(
2762                                         'rel' => 'alternate',
2763                                         'type' => 'application/x-wiki',
2764                                         'title' => $msg,
2765                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
2766                                 ) );
2767                                 // Alternate edit link
2768                                 $tags[] = Html::element( 'link', array(
2769                                         'rel' => 'edit',
2770                                         'title' => $msg,
2771                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
2772                                 ) );
2773                         }
2774                 }
2775
2776                 # Generally the order of the favicon and apple-touch-icon links
2777                 # should not matter, but Konqueror (3.5.9 at least) incorrectly
2778                 # uses whichever one appears later in the HTML source. Make sure
2779                 # apple-touch-icon is specified first to avoid this.
2780                 if ( $wgAppleTouchIcon !== false ) {
2781                         $tags[] = Html::element( 'link', array( 'rel' => 'apple-touch-icon', 'href' => $wgAppleTouchIcon ) );
2782                 }
2783
2784                 if ( $wgFavicon !== false ) {
2785                         $tags[] = Html::element( 'link', array( 'rel' => 'shortcut icon', 'href' => $wgFavicon ) );
2786                 }
2787
2788                 # OpenSearch description link
2789                 $tags[] = Html::element( 'link', array(
2790                         'rel' => 'search',
2791                         'type' => 'application/opensearchdescription+xml',
2792                         'href' => wfScript( 'opensearch_desc' ),
2793                         'title' => wfMsgForContent( 'opensearch-desc' ),
2794                 ) );
2795
2796                 if ( $wgEnableAPI ) {
2797                         # Real Simple Discovery link, provides auto-discovery information
2798                         # for the MediaWiki API (and potentially additional custom API
2799                         # support such as WordPress or Twitter-compatible APIs for a
2800                         # blogging extension, etc)
2801                         $tags[] = Html::element( 'link', array(
2802                                 'rel' => 'EditURI',
2803                                 'type' => 'application/rsd+xml',
2804                                 'href' => wfExpandUrl( wfAppendQuery( wfScript( 'api' ), array( 'action' => 'rsd' ) ) ),
2805                         ) );
2806                 }
2807
2808                 # Metadata links
2809                 # - Creative Commons
2810                 #   See http://wiki.creativecommons.org/Extend_Metadata.
2811                 # - Dublin Core
2812                 #   Use hreflang to specify canonical and alternate links
2813                 #   See http://www.google.com/support/webmasters/bin/answer.py?answer=189077
2814                 if ( $this->isArticleRelated() ) {
2815                         # note: buggy CC software only reads first "meta" link
2816                         if ( $wgEnableCreativeCommonsRdf ) {
2817                                 $tags[] = Html::element( 'link', array(
2818                                         'rel' => $this->getMetadataAttribute(),
2819                                         'title' => 'Creative Commons',
2820                                         'type' => 'application/rdf+xml',
2821                                         'href' => $this->getTitle()->getLocalURL( 'action=creativecommons' ) )
2822                                 );
2823                         }
2824
2825                         if ( $wgEnableDublinCoreRdf ) {
2826                                 $tags[] = Html::element( 'link', array(
2827                                         'rel' => $this->getMetadataAttribute(),
2828                                         'title' => 'Dublin Core',
2829                                         'type' => 'application/rdf+xml',
2830                                         'href' => $this->getTitle()->getLocalURL( 'action=dublincore' ) )
2831                                 );
2832                         }
2833                 }
2834
2835                 # Language variants
2836                 if ( !$wgDisableLangConversion && $wgCanonicalLanguageLinks
2837                         && $wgContLang->hasVariants() ) {
2838
2839                         $urlvar = $wgContLang->getURLVariant();
2840
2841                         if ( !$urlvar ) {
2842                                 $variants = $wgContLang->getVariants();
2843                                 foreach ( $variants as $_v ) {
2844                                         $tags[] = Html::element( 'link', array(
2845                                                 'rel' => 'alternate',
2846                                                 'hreflang' => $_v,
2847                                                 'href' => $this->getTitle()->getLocalURL( '', $_v ) )
2848                                         );
2849                                 }
2850                         } else {
2851                                 $tags[] = Html::element( 'link', array(
2852                                         'rel' => 'canonical',
2853                                         'href' => $this->getTitle()->getFullURL() )
2854                                 );
2855                         }
2856                 }
2857
2858                 # Copyright
2859                 $copyright = '';
2860                 if ( $wgRightsPage ) {
2861                         $copy = Title::newFromText( $wgRightsPage );
2862
2863                         if ( $copy ) {
2864                                 $copyright = $copy->getLocalURL();
2865                         }
2866                 }
2867
2868                 if ( !$copyright && $wgRightsUrl ) {
2869                         $copyright = $wgRightsUrl;
2870                 }
2871
2872                 if ( $copyright ) {
2873                         $tags[] = Html::element( 'link', array(
2874                                 'rel' => 'copyright',
2875                                 'href' => $copyright )
2876                         );
2877                 }
2878
2879                 # Feeds
2880                 if ( $wgFeed ) {
2881                         foreach( $this->getSyndicationLinks() as $format => $link ) {
2882                                 # Use the page name for the title (accessed through $wgTitle since
2883                                 # there's no other way).  In principle, this could lead to issues
2884                                 # with having the same name for different feeds corresponding to
2885                                 # the same page, but we can't avoid that at this low a level.
2886
2887                                 $tags[] = $this->feedLink(
2888                                         $format,
2889                                         $link,
2890                                         # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
2891                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() )
2892                                 );
2893                         }
2894
2895                         # Recent changes feed should appear on every page (except recentchanges,
2896                         # that would be redundant). Put it after the per-page feed to avoid
2897                         # changing existing behavior. It's still available, probably via a
2898                         # menu in your browser. Some sites might have a different feed they'd
2899                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
2900                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
2901                         # If so, use it instead.
2902
2903                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
2904
2905                         if ( $wgOverrideSiteFeed ) {
2906                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
2907                                         $tags[] = $this->feedLink(
2908                                                 $type,
2909                                                 htmlspecialchars( $feedUrl ),
2910                                                 wfMsg( "site-{$type}-feed", $wgSitename )
2911                                         );
2912                                 }
2913                         } elseif ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
2914                                 foreach ( $wgAdvertisedFeedTypes as $format ) {
2915                                         $tags[] = $this->feedLink(
2916                                                 $format,
2917                                                 $rctitle->getLocalURL( "feed={$format}" ),
2918                                                 wfMsg( "site-{$format}-feed", $wgSitename ) # For grep: 'site-rss-feed', 'site-atom-feed'.
2919                                         );
2920                                 }
2921                         }
2922                 }
2923                 return implode( "\n", $tags );
2924         }
2925
2926         /**
2927          * Generate a <link rel/> for a feed.
2928          *
2929          * @param $type String: feed type
2930          * @param $url String: URL to the feed
2931          * @param $text String: value of the "title" attribute
2932          * @return String: HTML fragment
2933          */
2934         private function feedLink( $type, $url, $text ) {
2935                 return Html::element( 'link', array(
2936                         'rel' => 'alternate',
2937                         'type' => "application/$type+xml",
2938                         'title' => $text,
2939                         'href' => $url )
2940                 );
2941         }
2942
2943         /**
2944          * Add a local or specified stylesheet, with the given media options.
2945          * Meant primarily for internal use...
2946          *
2947          * @param $style String: URL to the file
2948          * @param $media String: to specify a media type, 'screen', 'printable', 'handheld' or any.
2949          * @param $condition String: for IE conditional comments, specifying an IE version
2950          * @param $dir String: set to 'rtl' or 'ltr' for direction-specific sheets
2951          */
2952         public function addStyle( $style, $media = '', $condition = '', $dir = '' ) {
2953                 $options = array();
2954                 // Even though we expect the media type to be lowercase, but here we
2955                 // force it to lowercase to be safe.
2956                 if( $media ) {
2957                         $options['media'] = $media;
2958                 }
2959                 if( $condition ) {
2960                         $options['condition'] = $condition;
2961                 }
2962                 if( $dir ) {
2963                         $options['dir'] = $dir;
2964                 }
2965                 $this->styles[$style] = $options;
2966         }
2967
2968         /**
2969          * Adds inline CSS styles
2970          * @param $style_css Mixed: inline CSS
2971          */
2972         public function addInlineStyle( $style_css ){
2973                 $this->mInlineStyles .= Html::inlineStyle( $style_css );
2974         }
2975
2976         /**
2977          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
2978          * These will be applied to various media & IE conditionals.
2979          * @param $sk Skin object
2980          */
2981         public function buildCssLinks( $sk ) {
2982                 $ret = '';
2983                 // Add ResourceLoader styles
2984                 // Split the styles into four groups
2985                 $styles = array( 'other' => array(), 'user' => array(), 'site' => array(), 'private' => array(), 'noscript' => array() );
2986                 $resourceLoader = $this->getResourceLoader();
2987                 foreach ( $this->getModuleStyles() as $name ) {
2988                         $group = $resourceLoader->getModule( $name )->getGroup();
2989                         // Modules in groups named "other" or anything different than "user", "site" or "private"
2990                         // will be placed in the "other" group
2991                         $styles[isset( $styles[$group] ) ? $group : 'other'][] = $name;
2992                 }
2993
2994                 // We want site, private and user styles to override dynamically added styles from modules, but we want
2995                 // dynamically added styles to override statically added styles from other modules. So the order
2996                 // has to be other, dynamic, site, private, user
2997                 // Add statically added styles for other modules
2998                 $ret .= $this->makeResourceLoaderLink( $sk, $styles['other'], ResourceLoaderModule::TYPE_STYLES );
2999                 // Add normal styles added through addStyle()/addInlineStyle() here
3000                 $ret .= implode( "\n", $this->buildCssLinksArray() ) . $this->mInlineStyles;
3001                 // Add marker tag to mark the place where the client-side loader should inject dynamic styles
3002                 // We use a <meta> tag with a made-up name for this because that's valid HTML
3003                 $ret .= Html::element( 'meta', array( 'name' => 'ResourceLoaderDynamicStyles', 'content' => '' ) ) . "\n";
3004
3005                 // Add site, private and user styles
3006                 // 'private' at present only contains user.options, so put that before 'user'
3007                 // Any future private modules will likely have a similar user-specific character
3008                 foreach ( array( 'site', 'noscript', 'private', 'user' ) as $group ) {
3009                         $ret .= $this->makeResourceLoaderLink( $sk, $styles[$group],
3010                                         ResourceLoaderModule::TYPE_STYLES
3011                         );
3012                 }
3013                 return $ret;
3014         }
3015
3016         public function buildCssLinksArray() {
3017                 $links = array();
3018                 foreach( $this->styles as $file => $options ) {
3019                         $link = $this->styleLink( $file, $options );
3020                         if( $link ) {
3021                                 $links[$file] = $link;
3022                         }
3023                 }
3024                 return $links;
3025         }
3026
3027         /**
3028          * Generate \<link\> tags for stylesheets
3029          *
3030          * @param $style String: URL to the file
3031          * @param $options Array: option, can contain 'condition', 'dir', 'media'
3032          *                 keys
3033          * @return String: HTML fragment
3034          */
3035         protected function styleLink( $style, $options ) {
3036                 if( isset( $options['dir'] ) ) {
3037                         $siteDir = wfUILang()->getDir();
3038                         if( $siteDir != $options['dir'] ) {
3039                                 return '';
3040                         }
3041                 }
3042
3043                 if( isset( $options['media'] ) ) {
3044                         $media = self::transformCssMedia( $options['media'] );
3045                         if( is_null( $media ) ) {
3046                                 return '';
3047                         }
3048                 } else {
3049                         $media = 'all';
3050                 }
3051
3052                 if( substr( $style, 0, 1 ) == '/' ||
3053                         substr( $style, 0, 5 ) == 'http:' ||
3054                         substr( $style, 0, 6 ) == 'https:' ) {
3055                         $url = $style;
3056                 } else {
3057                         global $wgStylePath, $wgStyleVersion;
3058                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
3059                 }
3060
3061                 $link = Html::linkedStyle( $url, $media );
3062
3063                 if( isset( $options['condition'] ) ) {
3064                         $condition = htmlspecialchars( $options['condition'] );
3065                         $link = "<!--[if $condition]>$link<![endif]-->";
3066                 }
3067                 return $link;
3068         }
3069
3070         /**
3071          * Transform "media" attribute based on request parameters
3072          *
3073          * @param $media String: current value of the "media" attribute
3074          * @return String: modified value of the "media" attribute
3075          */
3076         public static function transformCssMedia( $media ) {
3077                 global $wgRequest, $wgHandheldForIPhone;
3078
3079                 // Switch in on-screen display for media testing
3080                 $switches = array(
3081                         'printable' => 'print',
3082                         'handheld' => 'handheld',
3083                 );
3084                 foreach( $switches as $switch => $targetMedia ) {
3085                         if( $wgRequest->getBool( $switch ) ) {
3086                                 if( $media == $targetMedia ) {
3087                                         $media = '';
3088                                 } elseif( $media == 'screen' ) {
3089                                         return null;
3090                                 }
3091                         }
3092                 }
3093
3094                 // Expand longer media queries as iPhone doesn't grok 'handheld'
3095                 if( $wgHandheldForIPhone ) {
3096                         $mediaAliases = array(
3097                                 'screen' => 'screen and (min-device-width: 481px)',
3098                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
3099                         );
3100
3101                         if( isset( $mediaAliases[$media] ) ) {
3102                                 $media = $mediaAliases[$media];
3103                         }
3104                 }
3105
3106                 return $media;
3107         }
3108
3109         /**
3110          * Turn off regular page output and return an error reponse
3111          * for when rate limiting has triggered.
3112          */
3113         public function rateLimited() {
3114                 $this->setPageTitle( wfMsg( 'actionthrottled' ) );
3115                 $this->setRobotPolicy( 'noindex,follow' );
3116                 $this->setArticleRelated( false );
3117                 $this->enableClientCache( false );
3118                 $this->mRedirect = '';
3119                 $this->clearHTML();
3120                 $this->setStatusCode( 503 );
3121                 $this->addWikiMsg( 'actionthrottledtext' );
3122
3123                 $this->returnToMain( null, $this->getTitle() );
3124         }
3125
3126         /**
3127          * Show a warning about slave lag
3128          *
3129          * If the lag is higher than $wgSlaveLagCritical seconds,
3130          * then the warning is a bit more obvious. If the lag is
3131          * lower than $wgSlaveLagWarning, then no warning is shown.
3132          *
3133          * @param $lag Integer: slave lag
3134          */
3135         public function showLagWarning( $lag ) {
3136                 global $wgSlaveLagWarning, $wgSlaveLagCritical, $wgLang;
3137                 if( $lag >= $wgSlaveLagWarning ) {
3138                         $message = $lag < $wgSlaveLagCritical
3139                                 ? 'lag-warn-normal'
3140                                 : 'lag-warn-high';
3141                         $wrap = Html::rawElement( 'div', array( 'class' => "mw-{$message}" ), "\n$1\n" );
3142                         $this->wrapWikiMsg( "$wrap\n", array( $message, $wgLang->formatNum( $lag ) ) );
3143                 }
3144         }
3145
3146         /**
3147          * Add a wikitext-formatted message to the output.
3148          * This is equivalent to:
3149          *
3150          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
3151          */
3152         public function addWikiMsg( /*...*/ ) {
3153                 $args = func_get_args();
3154                 $name = array_shift( $args );
3155                 $this->addWikiMsgArray( $name, $args );
3156         }
3157
3158         /**
3159          * Add a wikitext-formatted message to the output.
3160          * Like addWikiMsg() except the parameters are taken as an array
3161          * instead of a variable argument list.
3162          *
3163          * $options is passed through to wfMsgExt(), see that function for details.
3164          */
3165         public function addWikiMsgArray( $name, $args, $options = array() ) {
3166                 $options[] = 'parse';
3167                 $text = wfMsgExt( $name, $options, $args );
3168                 $this->addHTML( $text );
3169         }
3170
3171         /**
3172          * This function takes a number of message/argument specifications, wraps them in
3173          * some overall structure, and then parses the result and adds it to the output.
3174          *
3175          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
3176          * on. The subsequent arguments may either be strings, in which case they are the
3177          * message names, or arrays, in which case the first element is the message name,
3178          * and subsequent elements are the parameters to that message.
3179          *
3180          * The special named parameter 'options' in a message specification array is passed
3181          * through to the $options parameter of wfMsgExt().
3182          *
3183          * Don't use this for messages that are not in users interface language.
3184          *
3185          * For example:
3186          *
3187          *    $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>", 'some-error' );
3188          *
3189          * Is equivalent to:
3190          *
3191          *    $wgOut->addWikiText( "<div class='error'>\n" . wfMsgNoTrans( 'some-error' ) . "\n</div>" );
3192          *
3193          * The newline after opening div is needed in some wikitext. See bug 19226.
3194          */
3195         public function wrapWikiMsg( $wrap /*, ...*/ ) {
3196                 $msgSpecs = func_get_args();
3197                 array_shift( $msgSpecs );
3198                 $msgSpecs = array_values( $msgSpecs );
3199                 $s = $wrap;
3200                 foreach ( $msgSpecs as $n => $spec ) {
3201                         $options = array();
3202                         if ( is_array( $spec ) ) {
3203                                 $args = $spec;
3204                                 $name = array_shift( $args );
3205                                 if ( isset( $args['options'] ) ) {
3206                                         $options = $args['options'];
3207                                         unset( $args['options'] );
3208                                 }
3209                         }  else {
3210                                 $args = array();
3211                                 $name = $spec;
3212                         }
3213                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
3214                 }
3215                 $this->addWikiText( $s );
3216         }
3217
3218         /**
3219          * Include jQuery core. Use this to avoid loading it multiple times
3220          * before we get a usable script loader.
3221          *
3222          * @param $modules Array: list of jQuery modules which should be loaded
3223          * @return Array: the list of modules which were not loaded.
3224          * @since 1.16
3225          * @deprecated since 1.17
3226          */
3227         public function includeJQuery( $modules = array() ) {
3228                 return array();
3229         }
3230
3231 }