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         private $mContext;
 194
 195         /**
 196          * An array of stylesheet filenames (relative from skins path), with options
 197          * for CSS media, IE conditions, and RTL/LTR direction.
 198          * For internal use; add settings in the skin via $this->addStyle()
 199          *
 200          * Style again! This seems like a code duplication since we already have
 201          * mStyles. This is what makes OpenSource amazing.
 202          */
 203         var $styles = array();
 204
 205         /**
 206          * Whether jQuery is already handled.
 207          */
 208         protected $mJQueryDone = false;
 209
 210         private $mIndexPolicy = 'index';
 211         private $mFollowPolicy = 'follow';
 212         private $mVaryHeader = array(
 213                 'Accept-Encoding' => array( 'list-contains=gzip' ),
 214                 'Cookie' => null
 215         );
 216
 217         /**
 218          * Constructor for OutputPage. This should not be called directly.
 219          * Instead a new RequestContext should be created and it will implicitly create
 220          * a OutputPage tied to that context.
 221          */
 222         function __construct( RequestContext $context = null ) {
 223                 if ( !isset($context) ) {
 224                         # Extensions should use `new RequestContext` instead of `new OutputPage` now.
 225                         wfDeprecated( __METHOD__ );
 226                 }
 227                 $this->mContext = $context;
 228         }
 229
 230         /**
 231          * Redirect to $url rather than displaying the normal page
 232          *
 233          * @param $url String: URL
 234          * @param $responsecode String: HTTP status code
 235          */
 236         public function redirect( $url, $responsecode = '302' ) {
 237                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
 238                 $this->mRedirect = str_replace( "\n", '', $url );
 239                 $this->mRedirectCode = $responsecode;
 240         }
 241
 242         /**
 243          * Get the URL to redirect to, or an empty string if not redirect URL set
 244          *
 245          * @return String
 246          */
 247         public function getRedirect() {
 248                 return $this->mRedirect;
 249         }
 250
 251         /**
 252          * Set the HTTP status code to send with the output.
 253          *
 254          * @param $statusCode Integer
 255          */
 256         public function setStatusCode( $statusCode ) {
 257                 $this->mStatusCode = $statusCode;
 258         }
 259
 260         /**
 261          * Add a new <meta> tag
 262          * To add an http-equiv meta tag, precede the name with "http:"
 263          *
 264          * @param $name String tag name
 265          * @param $val String tag value
 266          */
 267         function addMeta( $name, $val ) {
 268                 array_push( $this->mMetatags, array( $name, $val ) );
 269         }
 270
 271         /**
 272          * Add a keyword or a list of keywords in the page header
 273          *
 274          * @param $text String or array of strings
 275          */
 276         function addKeyword( $text ) {
 277                 if( is_array( $text ) ) {
 278                         $this->mKeywords = array_merge( $this->mKeywords, $text );
 279                 } else {
 280                         array_push( $this->mKeywords, $text );
 281                 }
 282         }
 283
 284         /**
 285          * Add a new \<link\> tag to the page header
 286          *
 287          * @param $linkarr Array: associative array of attributes.
 288          */
 289         function addLink( $linkarr ) {
 290                 array_push( $this->mLinktags, $linkarr );
 291         }
 292
 293         /**
 294          * Add a new \<link\> with "rel" attribute set to "meta"
 295          *
 296          * @param $linkarr Array: associative array mapping attribute names to their
 297          *                 values, both keys and values will be escaped, and the
 298          *                 "rel" attribute will be automatically added
 299          */
 300         function addMetadataLink( $linkarr ) {
 301                 $linkarr['rel'] = $this->getMetadataAttribute();
 302                 $this->addLink( $linkarr );
 303         }
 304
 305         /**
 306          * Get the value of the "rel" attribute for metadata links
 307          *
 308          * @return String
 309          */
 310         private function getMetadataAttribute() {
 311                 # note: buggy CC software only reads first "meta" link
 312                 static $haveMeta = false;
 313                 if ( $haveMeta ) {
 314                         return 'alternate meta';
 315                 } else {
 316                         $haveMeta = true;
 317                         return 'meta';
 318                 }
 319         }
 320
 321         /**
 322          * Add raw HTML to the list of scripts (including \<script\> tag, etc.)
 323          *
 324          * @param $script String: raw HTML
 325          */
 326         function addScript( $script ) {
 327                 $this->mScripts .= $script . "\n";
 328         }
 329
 330         /**
 331          * Register and add a stylesheet from an extension directory.
 332          *
 333          * @param $url String path to sheet.  Provide either a full url (beginning
 334          *             with 'http', etc) or a relative path from the document root
 335          *             (beginning with '/').  Otherwise it behaves identically to
 336          *             addStyle() and draws from the /skins folder.
 337          */
 338         public function addExtensionStyle( $url ) {
 339                 array_push( $this->mExtStyles, $url );
 340         }
 341
 342         /**
 343          * Get all styles added by extensions
 344          *
 345          * @return Array
 346          */
 347         function getExtStyle() {
 348                 return $this->mExtStyles;
 349         }
 350
 351         /**
 352          * Add a JavaScript file out of skins/common, or a given relative path.
 353          *
 354          * @param $file String: filename in skins/common or complete on-server path
 355          *              (/foo/bar.js)
 356          * @param $version String: style version of the file. Defaults to $wgStyleVersion
 357          */
 358         public function addScriptFile( $file, $version = null ) {
 359                 global $wgStylePath, $wgStyleVersion;
 360                 // See if $file parameter is an absolute URL or begins with a slash
 361                 if( substr( $file, 0, 1 ) == '/' || preg_match( '#^[a-z]*://#i', $file ) ) {
 362                         $path = $file;
 363                 } else {
 364                         $path = "{$wgStylePath}/common/{$file}";
 365                 }
 366                 if ( is_null( $version ) )
 367                         $version = $wgStyleVersion;
 368                 $this->addScript( Html::linkedScript( wfAppendQuery( $path, $version ) ) );
 369         }
 370
 371         /**
 372          * Add a self-contained script tag with the given contents
 373          *
 374          * @param $script String: JavaScript text, no <script> tags
 375          */
 376         public function addInlineScript( $script ) {
 377                 $this->mScripts .= Html::inlineScript( "\n$script\n" ) . "\n";
 378         }
 379
 380         /**
 381          * Get all registered JS and CSS tags for the header.
 382          *
 383          * @return String
 384          */
 385         function getScript() {
 386                 return $this->mScripts . $this->getHeadItems();
 387         }
 388
 389         /**
 390          * Filter an array of modules to remove insufficiently trustworthy members, and modules
 391          * which are no longer registered (eg a page is cached before an extension is disabled)
 392          * @param $modules Array
 393          * @return Array
 394          */
 395         protected function filterModules( $modules, $type = ResourceLoaderModule::TYPE_COMBINED ){
 396                 $resourceLoader = $this->getResourceLoader();
 397                 $filteredModules = array();
 398                 foreach( $modules as $val ){
 399                         $module = $resourceLoader->getModule( $val );
 400                         if( $module instanceof ResourceLoaderModule
 401                                 && $module->getOrigin() <= $this->getAllowedModules( $type ) )
 402                         {
 403                                 $filteredModules[] = $val;
 404                         }
 405                 }
 406                 return $filteredModules;
 407         }
 408
 409         /**
 410          * Get the list of modules to include on this page
 411          *
 412          * @param $filter Bool whether to filter out insufficiently trustworthy modules
 413          * @return Array of module names
 414          */
 415         public function getModules( $filter = false, $param = 'mModules' ) {
 416                 $modules = array_values( array_unique( $this->$param ) );
 417                 return $filter
 418                         ? $this->filterModules( $modules )
 419                         : $modules;
 420         }
 421
 422         /**
 423          * Add one or more modules recognized by the resource loader. Modules added
 424          * through this function will be loaded by the resource loader when the
 425          * page loads.
 426          *
 427          * @param $modules Mixed: module name (string) or array of module names
 428          */
 429         public function addModules( $modules ) {
 430                 $this->mModules = array_merge( $this->mModules, (array)$modules );
 431         }
 432
 433         /**
 434          * Get the list of module JS to include on this page
 435          * @return array of module names
 436          */
 437         public function getModuleScripts( $filter = false ) {
 438                 return $this->getModules( $filter, 'mModuleScripts' );
 439         }
 440
 441         /**
 442          * Add only JS of one or more modules recognized by the resource loader. Module
 443          * scripts added through this function will be loaded by the resource loader when
 444          * the page loads.
 445          *
 446          * @param $modules Mixed: module name (string) or array of module names
 447          */
 448         public function addModuleScripts( $modules ) {
 449                 $this->mModuleScripts = array_merge( $this->mModuleScripts, (array)$modules );
 450         }
 451
 452         /**
 453          * Get the list of module CSS to include on this page
 454          *
 455          * @return Array of module names
 456          */
 457         public function getModuleStyles( $filter = false ) {
 458                 return $this->getModules( $filter, 'mModuleStyles' );
 459         }
 460
 461         /**
 462          * Add only CSS of one or more modules recognized by the resource loader. Module
 463          * styles added through this function will be loaded by the resource loader when
 464          * the page loads.
 465          *
 466          * @param $modules Mixed: module name (string) or array of module names
 467          */
 468         public function addModuleStyles( $modules ) {
 469                 $this->mModuleStyles = array_merge( $this->mModuleStyles, (array)$modules );
 470         }
 471
 472         /**
 473          * Get the list of module messages to include on this page
 474          *
 475          * @return Array of module names
 476          */
 477         public function getModuleMessages( $filter = false ) {
 478                 return $this->getModules( $filter, 'mModuleMessages' );
 479         }
 480
 481         /**
 482          * Add only messages of one or more modules recognized by the resource loader.
 483          * Module messages added through this function will be loaded by the resource
 484          * loader when the page loads.
 485          *
 486          * @param $modules Mixed: module name (string) or array of module names
 487          */
 488         public function addModuleMessages( $modules ) {
 489                 $this->mModuleMessages = array_merge( $this->mModuleMessages, (array)$modules );
 490         }
 491
 492         /**
 493          * Get all header items in a string
 494          *
 495          * @return String
 496          */
 497         function getHeadItems() {
 498                 $s = '';
 499                 foreach ( $this->mHeadItems as $item ) {
 500                         $s .= $item;
 501                 }
 502                 return $s;
 503         }
 504
 505         /**
 506          * Add or replace an header item to the output
 507          *
 508          * @param $name String: item name
 509          * @param $value String: raw HTML
 510          */
 511         public function addHeadItem( $name, $value ) {
 512                 $this->mHeadItems[$name] = $value;
 513         }
 514
 515         /**
 516          * Check if the header item $name is already set
 517          *
 518          * @param $name String: item name
 519          * @return Boolean
 520          */
 521         public function hasHeadItem( $name ) {
 522                 return isset( $this->mHeadItems[$name] );
 523         }
 524
 525         /**
 526          * Set the value of the ETag HTTP header, only used if $wgUseETag is true
 527          *
 528          * @param $tag String: value of "ETag" header
 529          */
 530         function setETag( $tag ) {
 531                 $this->mETag = $tag;
 532         }
 533
 534         /**
 535          * Set whether the output should only contain the body of the article,
 536          * without any skin, sidebar, etc.
 537          * Used e.g. when calling with "action=render".
 538          *
 539          * @param $only Boolean: whether to output only the body of the article
 540          */
 541         public function setArticleBodyOnly( $only ) {
 542                 $this->mArticleBodyOnly = $only;
 543         }
 544
 545         /**
 546          * Return whether the output will contain only the body of the article
 547          *
 548          * @return Boolean
 549          */
 550         public function getArticleBodyOnly() {
 551                 return $this->mArticleBodyOnly;
 552         }
 553
 554         /**
 555          * checkLastModified tells the client to use the client-cached page if
 556          * possible. If sucessful, the OutputPage is disabled so that
 557          * any future call to OutputPage->output() have no effect.
 558          *
 559          * Side effect: sets mLastModified for Last-Modified header
 560          *
 561          * @return Boolean: true iff cache-ok headers was sent.
 562          */
 563         public function checkLastModified( $timestamp ) {
 564                 global $wgCachePages, $wgCacheEpoch;
 565
 566                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 567                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 568                         return false;
 569                 }
 570                 if( !$wgCachePages ) {
 571                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 572                         return false;
 573                 }
 574                 if( $this->getUser()->getOption( 'nocache' ) ) {
 575                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 576                         return false;
 577                 }
 578
 579                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 580                 $modifiedTimes = array(
 581                         'page' => $timestamp,
 582                         'user' => $this->getUser()->getTouched(),
 583                         'epoch' => $wgCacheEpoch
 584                 );
 585                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 586
 587                 $maxModified = max( $modifiedTimes );
 588                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 589
 590                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 591                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 592                         return false;
 593                 }
 594
 595                 # Make debug info
 596                 $info = '';
 597                 foreach ( $modifiedTimes as $name => $value ) {
 598                         if ( $info !== '' ) {
 599                                 $info .= ', ';
 600                         }
 601                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 602                 }
 603
 604                 # IE sends sizes after the date like this:
 605                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 606                 # this breaks strtotime().
 607                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 608
 609                 wfSuppressWarnings(); // E_STRICT system time bitching
 610                 $clientHeaderTime = strtotime( $clientHeader );
 611                 wfRestoreWarnings();
 612                 if ( !$clientHeaderTime ) {
 613                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 614                         return false;
 615                 }
 616                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 617
 618                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 619                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 620                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 621                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 622                 if( $clientHeaderTime < $maxModified ) {
 623                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 624                         return false;
 625                 }
 626
 627                 # Not modified
 628                 # Give a 304 response code and disable body output
 629                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 630                 ini_set( 'zlib.output_compression', 0 );
 631                 $this->getRequest()->response()->header( "HTTP/1.1 304 Not Modified" );
 632                 $this->sendCacheControl();
 633                 $this->disable();
 634
 635                 // Don't output a compressed blob when using ob_gzhandler;
 636                 // it's technically against HTTP spec and seems to confuse
 637                 // Firefox when the response gets split over two packets.
 638                 wfClearOutputBuffers();
 639
 640                 return true;
 641         }
 642
 643         /**
 644          * Override the last modified timestamp
 645          *
 646          * @param $timestamp String: new timestamp, in a format readable by
 647          *        wfTimestamp()
 648          */
 649         public function setLastModified( $timestamp ) {
 650                 $this->mLastModified = wfTimestamp( TS_RFC2822, $timestamp );
 651         }
 652
 653         /**
 654          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 655          *
 656          * @param $policy String: the literal string to output as the contents of
 657          *   the meta tag.  Will be parsed according to the spec and output in
 658          *   standardized form.
 659          * @return null
 660          */
 661         public function setRobotPolicy( $policy ) {
 662                 $policy = Article::formatRobotPolicy( $policy );
 663
 664                 if( isset( $policy['index'] ) ) {
 665                         $this->setIndexPolicy( $policy['index'] );
 666                 }
 667                 if( isset( $policy['follow'] ) ) {
 668                         $this->setFollowPolicy( $policy['follow'] );
 669                 }
 670         }
 671
 672         /**
 673          * Set the index policy for the page, but leave the follow policy un-
 674          * touched.
 675          *
 676          * @param $policy string Either 'index' or 'noindex'.
 677          * @return null
 678          */
 679         public function setIndexPolicy( $policy ) {
 680                 $policy = trim( $policy );
 681                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 682                         $this->mIndexPolicy = $policy;
 683                 }
 684         }
 685
 686         /**
 687          * Set the follow policy for the page, but leave the index policy un-
 688          * touched.
 689          *
 690          * @param $policy String: either 'follow' or 'nofollow'.
 691          * @return null
 692          */
 693         public function setFollowPolicy( $policy ) {
 694                 $policy = trim( $policy );
 695                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 696                         $this->mFollowPolicy = $policy;
 697                 }
 698         }
 699
 700         /**
 701          * Set the new value of the "action text", this will be added to the
 702          * "HTML title", separated from it with " - ".
 703          *
 704          * @param $text String: new value of the "action text"
 705          */
 706         public function setPageTitleActionText( $text ) {
 707                 $this->mPageTitleActionText = $text;
 708         }
 709
 710         /**
 711          * Get the value of the "action text"
 712          *
 713          * @return String
 714          */
 715         public function getPageTitleActionText() {
 716                 if ( isset( $this->mPageTitleActionText ) ) {
 717                         return $this->mPageTitleActionText;
 718                 }
 719         }
 720
 721         /**
 722          * "HTML title" means the contents of <title>.
 723          * It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 724          */
 725         public function setHTMLTitle( $name ) {
 726                 $this->mHTMLtitle = $name;
 727         }
 728
 729         /**
 730          * Return the "HTML title", i.e. the content of the <title> tag.
 731          *
 732          * @return String
 733          */
 734         public function getHTMLTitle() {
 735                 return $this->mHTMLtitle;
 736         }
 737
 738         /**
 739          * "Page title" means the contents of \<h1\>. It is stored as a valid HTML fragment.
 740          * This function allows good tags like \<sup\> in the \<h1\> tag, but not bad tags like \<script\>.
 741          * This function automatically sets \<title\> to the same content as \<h1\> but with all tags removed.
 742          * Bad tags that were escaped in \<h1\> will still be escaped in \<title\>, and good tags like \<i\> will be dropped entirely.
 743          */
 744         public function setPageTitle( $name ) {
 745                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 746                 # but leave "<i>foobar</i>" alone
 747                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 748                 $this->mPagetitle = $nameWithTags;
 749
 750                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 751                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 752         }
 753
 754         /**
 755          * Return the "page title", i.e. the content of the \<h1\> tag.
 756          *
 757          * @return String
 758          */
 759         public function getPageTitle() {
 760                 return $this->mPagetitle;
 761         }
 762
 763         /**
 764          * Get the RequestContext used in this instance
 765          *
 766          * @return RequestContext
 767          */
 768         private function getContext() {
 769                 if ( !isset($this->mContext) ) {
 770                         wfDebug( __METHOD__ . " called and \$mContext is null. Using RequestContext::getMain(); for sanity\n" );
 771                         $this->mContext = RequestContext::getMain();
 772                 }
 773                 return $this->mContext;
 774         }
 775
 776         /**
 777          * Get the WebRequest being used for this instance
 778          *
 779          * @return WebRequest
 780          * @since 1.18
 781          */
 782         public function getRequest() {
 783                 return $this->getContext()->getRequest();
 784         }
 785
 786         /**
 787          * Set the Title object to use
 788          *
 789          * @param $t Title object
 790          */
 791         public function setTitle( $t ) {
 792                 $this->getContext()->setTitle($t);
 793         }
 794
 795         /**
 796          * Get the Title object used in this instance
 797          *
 798          * @return Title
 799          */
 800         public function getTitle() {
 801                 return $this->getContext()->getTitle();
 802         }
 803
 804         /**
 805          * Get the User object used in this instance
 806          *
 807          * @return User
 808          * @since 1.18
 809          */
 810         public function getUser() {
 811                 return $this->getContext()->getUser();
 812         }
 813
 814         /**
 815          * Get the Skin object used to render this instance
 816          *
 817          * @return Skin
 818          * @since 1.18
 819          */
 820         public function getSkin() {
 821                 return $this->getContext()->getSkin();
 822         }
 823
 824         /**
 825          * Replace the subtile with $str
 826          *
 827          * @param $str String: new value of the subtitle
 828          */
 829         public function setSubtitle( $str ) {
 830                 $this->mSubtitle = /*$this->parse(*/ $str /*)*/; // @bug 2514
 831         }
 832
 833         /**
 834          * Add $str to the subtitle
 835          *
 836          * @param $str String to add to the subtitle
 837          */
 838         public function appendSubtitle( $str ) {
 839                 $this->mSubtitle .= /*$this->parse(*/ $str /*)*/; // @bug 2514
 840         }
 841
 842         /**
 843          * Get the subtitle
 844          *
 845          * @return String
 846          */
 847         public function getSubtitle() {
 848                 return $this->mSubtitle;
 849         }
 850
 851         /**
 852          * Set the page as printable, i.e. it'll be displayed with with all
 853          * print styles included
 854          */
 855         public function setPrintable() {
 856                 $this->mPrintable = true;
 857         }
 858
 859         /**
 860          * Return whether the page is "printable"
 861          *
 862          * @return Boolean
 863          */
 864         public function isPrintable() {
 865                 return $this->mPrintable;
 866         }
 867
 868         /**
 869          * Disable output completely, i.e. calling output() will have no effect
 870          */
 871         public function disable() {
 872                 $this->mDoNothing = true;
 873         }
 874
 875         /**
 876          * Return whether the output will be completely disabled
 877          *
 878          * @return Boolean
 879          */
 880         public function isDisabled() {
 881                 return $this->mDoNothing;
 882         }
 883
 884         /**
 885          * Show an "add new section" link?
 886          *
 887          * @return Boolean
 888          */
 889         public function showNewSectionLink() {
 890                 return $this->mNewSectionLink;
 891         }
 892
 893         /**
 894          * Forcibly hide the new section link?
 895          *
 896          * @return Boolean
 897          */
 898         public function forceHideNewSectionLink() {
 899                 return $this->mHideNewSectionLink;
 900         }
 901
 902         /**
 903          * Add or remove feed links in the page header
 904          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 905          * for the new version
 906          * @see addFeedLink()
 907          *
 908          * @param $show Boolean: true: add default feeds, false: remove all feeds
 909          */
 910         public function setSyndicated( $show = true ) {
 911                 if ( $show ) {
 912                         $this->setFeedAppendQuery( false );
 913                 } else {
 914                         $this->mFeedLinks = array();
 915                 }
 916         }
 917
 918         /**
 919          * Add default feeds to the page header
 920          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 921          * for the new version
 922          * @see addFeedLink()
 923          *
 924          * @param $val String: query to append to feed links or false to output
 925          *        default links
 926          */
 927         public function setFeedAppendQuery( $val ) {
 928                 global $wgAdvertisedFeedTypes;
 929
 930                 $this->mFeedLinks = array();
 931
 932                 foreach ( $wgAdvertisedFeedTypes as $type ) {
 933                         $query = "feed=$type";
 934                         if ( is_string( $val ) ) {
 935                                 $query .= '&' . $val;
 936                         }
 937                         $this->mFeedLinks[$type] = $this->getTitle()->getLocalURL( $query );
 938                 }
 939         }
 940
 941         /**
 942          * Add a feed link to the page header
 943          *
 944          * @param $format String: feed type, should be a key of $wgFeedClasses
 945          * @param $href String: URL
 946          */
 947         public function addFeedLink( $format, $href ) {
 948                 global $wgAdvertisedFeedTypes;
 949
 950                 if ( in_array( $format, $wgAdvertisedFeedTypes ) ) {
 951                         $this->mFeedLinks[$format] = $href;
 952                 }
 953         }
 954
 955         /**
 956          * Should we output feed links for this page?
 957          * @return Boolean
 958          */
 959         public function isSyndicated() {
 960                 return count( $this->mFeedLinks ) > 0;
 961         }
 962
 963         /**
 964          * Return URLs for each supported syndication format for this page.
 965          * @return array associating format keys with URLs
 966          */
 967         public function getSyndicationLinks() {
 968                 return $this->mFeedLinks;
 969         }
 970
 971         /**
 972          * Will currently always return null
 973          *
 974          * @return null
 975          */
 976         public function getFeedAppendQuery() {
 977                 return $this->mFeedLinksAppendQuery;
 978         }
 979
 980         /**
 981          * Set whether the displayed content is related to the source of the
 982          * corresponding article on the wiki
 983          * Setting true will cause the change "article related" toggle to true
 984          *
 985          * @param $v Boolean
 986          */
 987         public function setArticleFlag( $v ) {
 988                 $this->mIsarticle = $v;
 989                 if ( $v ) {
 990                         $this->mIsArticleRelated = $v;
 991                 }
 992         }
 993
 994         /**
 995          * Return whether the content displayed page is related to the source of
 996          * the corresponding article on the wiki
 997          *
 998          * @return Boolean
 999          */
1000         public function isArticle() {
1001                 return $this->mIsarticle;
1002         }
1003
1004         /**
1005          * Set whether this page is related an article on the wiki
1006          * Setting false will cause the change of "article flag" toggle to false
1007          *
1008          * @param $v Boolean
1009          */
1010         public function setArticleRelated( $v ) {
1011                 $this->mIsArticleRelated = $v;
1012                 if ( !$v ) {
1013                         $this->mIsarticle = false;
1014                 }
1015         }
1016
1017         /**
1018          * Return whether this page is related an article on the wiki
1019          *
1020          * @return Boolean
1021          */
1022         public function isArticleRelated() {
1023                 return $this->mIsArticleRelated;
1024         }
1025
1026         /**
1027          * Add new language links
1028          *
1029          * @param $newLinkArray Associative array mapping language code to the page
1030          *                      name
1031          */
1032         public function addLanguageLinks( $newLinkArray ) {
1033                 $this->mLanguageLinks += $newLinkArray;
1034         }
1035
1036         /**
1037          * Reset the language links and add new language links
1038          *
1039          * @param $newLinkArray Associative array mapping language code to the page
1040          *                      name
1041          */
1042         public function setLanguageLinks( $newLinkArray ) {
1043                 $this->mLanguageLinks = $newLinkArray;
1044         }
1045
1046         /**
1047          * Get the list of language links
1048          *
1049          * @return Array of Interwiki Prefixed (non DB key) Titles (e.g. 'fr:Test page')
1050          */
1051         public function getLanguageLinks() {
1052                 return $this->mLanguageLinks;
1053         }
1054
1055         /**
1056          * Add an array of categories, with names in the keys
1057          *
1058          * @param $categories Array mapping category name => sort key
1059          */
1060         public function addCategoryLinks( $categories ) {
1061                 global $wgContLang;
1062
1063                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
1064                         return;
1065                 }
1066
1067                 # Add the links to a LinkBatch
1068                 $arr = array( NS_CATEGORY => $categories );
1069                 $lb = new LinkBatch;
1070                 $lb->setArray( $arr );
1071
1072                 # Fetch existence plus the hiddencat property
1073                 $dbr = wfGetDB( DB_SLAVE );
1074                 $res = $dbr->select( array( 'page', 'page_props' ),
1075                         array( 'page_id', 'page_namespace', 'page_title', 'page_len', 'page_is_redirect', 'page_latest', 'pp_value' ),
1076                         $lb->constructSet( 'page', $dbr ),
1077                         __METHOD__,
1078                         array(),
1079                         array( 'page_props' => array( 'LEFT JOIN', array( 'pp_propname' => 'hiddencat', 'pp_page = page_id' ) ) )
1080                 );
1081
1082                 # Add the results to the link cache
1083                 $lb->addResultToCache( LinkCache::singleton(), $res );
1084
1085                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
1086                 $categories = array_combine(
1087                         array_keys( $categories ),
1088                         array_fill( 0, count( $categories ), 'normal' )
1089                 );
1090
1091                 # Mark hidden categories
1092                 foreach ( $res as $row ) {
1093                         if ( isset( $row->pp_value ) ) {
1094                                 $categories[$row->page_title] = 'hidden';
1095                         }
1096                 }
1097
1098                 # Add the remaining categories to the skin
1099                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
1100                         foreach ( $categories as $category => $type ) {
1101                                 $origcategory = $category;
1102                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
1103                                 $wgContLang->findVariantLink( $category, $title, true );
1104                                 if ( $category != $origcategory ) {
1105                                         if ( array_key_exists( $category, $categories ) ) {
1106                                                 continue;
1107                                         }
1108                                 }
1109                                 $text = $wgContLang->convertHtml( $title->getText() );
1110                                 $this->mCategories[] = $title->getText();
1111                                 $this->mCategoryLinks[$type][] = $this->getSkin()->link( $title, $text );
1112                         }
1113                 }
1114         }
1115
1116         /**
1117          * Reset the category links (but not the category list) and add $categories
1118          *
1119          * @param $categories Array mapping category name => sort key
1120          */
1121         public function setCategoryLinks( $categories ) {
1122                 $this->mCategoryLinks = array();
1123                 $this->addCategoryLinks( $categories );
1124         }
1125
1126         /**
1127          * Get the list of category links, in a 2-D array with the following format:
1128          * $arr[$type][] = $link, where $type is either "normal" or "hidden" (for
1129          * hidden categories) and $link a HTML fragment with a link to the category
1130          * page
1131          *
1132          * @return Array
1133          */
1134         public function getCategoryLinks() {
1135                 return $this->mCategoryLinks;
1136         }
1137
1138         /**
1139          * Get the list of category names this page belongs to
1140          *
1141          * @return Array of strings
1142          */
1143         public function getCategories() {
1144                 return $this->mCategories;
1145         }
1146
1147         /**
1148          * Do not allow scripts which can be modified by wiki users to load on this page;
1149          * only allow scripts bundled with, or generated by, the software.
1150          */
1151         public function disallowUserJs() {
1152                 $this->reduceAllowedModules(
1153                         ResourceLoaderModule::TYPE_SCRIPTS,
1154                         ResourceLoaderModule::ORIGIN_CORE_INDIVIDUAL
1155                 );
1156         }
1157
1158         /**
1159          * Return whether user JavaScript is allowed for this page
1160          * @deprecated since 1.18 Load modules with ResourceLoader, and origin and
1161          *     trustworthiness is identified and enforced automagically.
1162          * @return Boolean
1163          */
1164         public function isUserJsAllowed() {
1165                 return $this->getAllowedModules( ResourceLoaderModule::TYPE_SCRIPTS ) >= ResourceLoaderModule::ORIGIN_USER_INDIVIDUAL;
1166         }
1167
1168         /**
1169          * Show what level of JavaScript / CSS untrustworthiness is allowed on this page
1170          * @see ResourceLoaderModule::$origin
1171          * @param $type String ResourceLoaderModule TYPE_ constant
1172          * @return Int ResourceLoaderModule ORIGIN_ class constant
1173          */
1174         public function getAllowedModules( $type ){
1175                 if( $type == ResourceLoaderModule::TYPE_COMBINED ){
1176                         return min( array_values( $this->mAllowedModules ) );
1177                 } else {
1178                         return isset( $this->mAllowedModules[$type] )
1179                                 ? $this->mAllowedModules[$type]
1180                                 : ResourceLoaderModule::ORIGIN_ALL;
1181                 }
1182         }
1183
1184         /**
1185          * Set the highest level of CSS/JS untrustworthiness allowed
1186          * @param  $type String ResourceLoaderModule TYPE_ constant
1187          * @param  $level Int ResourceLoaderModule class constant
1188          */
1189         public function setAllowedModules( $type, $level ){
1190                 $this->mAllowedModules[$type] = $level;
1191         }
1192
1193         /**
1194          * As for setAllowedModules(), but don't inadvertantly make the page more accessible
1195          * @param  $type String
1196          * @param  $level Int ResourceLoaderModule class constant
1197          */
1198         public function reduceAllowedModules( $type, $level ){
1199                 $this->mAllowedModules[$type] = min( $this->getAllowedModules($type), $level );
1200         }
1201
1202         /**
1203          * Prepend $text to the body HTML
1204          *
1205          * @param $text String: HTML
1206          */
1207         public function prependHTML( $text ) {
1208                 $this->mBodytext = $text . $this->mBodytext;
1209         }
1210
1211         /**
1212          * Append $text to the body HTML
1213          *
1214          * @param $text String: HTML
1215          */
1216         public function addHTML( $text ) {
1217                 $this->mBodytext .= $text;
1218         }
1219
1220         /**
1221          * Clear the body HTML
1222          */
1223         public function clearHTML() {
1224                 $this->mBodytext = '';
1225         }
1226
1227         /**
1228          * Get the body HTML
1229          *
1230          * @return String: HTML
1231          */
1232         public function getHTML() {
1233                 return $this->mBodytext;
1234         }
1235
1236         /**
1237          * Add $text to the debug output
1238          *
1239          * @param $text String: debug text
1240          */
1241         public function debug( $text ) {
1242                 $this->mDebugtext .= $text;
1243         }
1244
1245         /**
1246          * Get/set the ParserOptions object to use for wikitext parsing
1247          *
1248          * @param $options either the ParserOption to use or null to only get the
1249          *                 current ParserOption object
1250          * @return ParserOptions object
1251          */
1252         public function parserOptions( $options = null ) {
1253                 if ( !$this->mParserOptions ) {
1254                         $this->mParserOptions = new ParserOptions;
1255                 }
1256                 return wfSetVar( $this->mParserOptions, $options );
1257         }
1258
1259         /**
1260          * Set the revision ID which will be seen by the wiki text parser
1261          * for things such as embedded {{REVISIONID}} variable use.
1262          *
1263          * @param $revid Mixed: an positive integer, or null
1264          * @return Mixed: previous value
1265          */
1266         public function setRevisionId( $revid ) {
1267                 $val = is_null( $revid ) ? null : intval( $revid );
1268                 return wfSetVar( $this->mRevisionId, $val );
1269         }
1270
1271         /**
1272          * Get the current revision ID
1273          *
1274          * @return Integer
1275          */
1276         public function getRevisionId() {
1277                 return $this->mRevisionId;
1278         }
1279
1280         /**
1281          * Get the templates used on this page
1282          *
1283          * @return Array (namespace => dbKey => revId)
1284          * @since 1.18
1285          */
1286         public function getTemplateIds() {
1287                 return $this->mTemplateIds;
1288         }
1289
1290         /**
1291          * Get the files used on this page
1292          *
1293          * @return Array (dbKey => array('time' => MW timestamp or null, 'sha1' => sha1 or ''))
1294          * @since 1.18
1295          */
1296         public function getImageTimeKeys() {
1297                 return $this->mImageTimeKeys;
1298         }
1299
1300         /**
1301          * Convert wikitext to HTML and add it to the buffer
1302          * Default assumes that the current page title will be used.
1303          *
1304          * @param $text String
1305          * @param $linestart Boolean: is this the start of a line?
1306          */
1307         public function addWikiText( $text, $linestart = true ) {
1308                 $title = $this->getTitle(); // Work arround E_STRICT
1309                 $this->addWikiTextTitle( $text, $title, $linestart );
1310         }
1311
1312         /**
1313          * Add wikitext with a custom Title object
1314          *
1315          * @param $text String: wikitext
1316          * @param $title Title object
1317          * @param $linestart Boolean: is this the start of a line?
1318          */
1319         public function addWikiTextWithTitle( $text, &$title, $linestart = true ) {
1320                 $this->addWikiTextTitle( $text, $title, $linestart );
1321         }
1322
1323         /**
1324          * Add wikitext with a custom Title object and
1325          *
1326          * @param $text String: wikitext
1327          * @param $title Title object
1328          * @param $linestart Boolean: is this the start of a line?
1329          */
1330         function addWikiTextTitleTidy( $text, &$title, $linestart = true ) {
1331                 $this->addWikiTextTitle( $text, $title, $linestart, true );
1332         }
1333
1334         /**
1335          * Add wikitext with tidy enabled
1336          *
1337          * @param $text String: wikitext
1338          * @param $linestart Boolean: is this the start of a line?
1339          */
1340         public function addWikiTextTidy( $text, $linestart = true ) {
1341                 $title = $this->getTitle();
1342                 $this->addWikiTextTitleTidy( $text, $title, $linestart );
1343         }
1344
1345         /**
1346          * Add wikitext with a custom Title object
1347          *
1348          * @param $text String: wikitext
1349          * @param $title Title object
1350          * @param $linestart Boolean: is this the start of a line?
1351          * @param $tidy Boolean: whether to use tidy
1352          */
1353         public function addWikiTextTitle( $text, &$title, $linestart, $tidy = false ) {
1354                 global $wgParser;
1355
1356                 wfProfileIn( __METHOD__ );
1357
1358                 wfIncrStats( 'pcache_not_possible' );
1359
1360                 $popts = $this->parserOptions();
1361                 $oldTidy = $popts->setTidy( $tidy );
1362
1363                 $parserOutput = $wgParser->parse(
1364                         $text, $title, $popts,
1365                         $linestart, true, $this->mRevisionId
1366                 );
1367
1368                 $popts->setTidy( $oldTidy );
1369
1370                 $this->addParserOutput( $parserOutput );
1371
1372                 wfProfileOut( __METHOD__ );
1373         }
1374
1375         /**
1376          * Add a ParserOutput object, but without Html
1377          *
1378          * @param $parserOutput ParserOutput object
1379          */
1380         public function addParserOutputNoText( &$parserOutput ) {
1381                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
1382                 $this->addCategoryLinks( $parserOutput->getCategories() );
1383                 $this->mNewSectionLink = $parserOutput->getNewSection();
1384                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
1385
1386                 $this->mParseWarnings = $parserOutput->getWarnings();
1387                 if ( !$parserOutput->isCacheable() ) {
1388                         $this->enableClientCache( false );
1389                 }
1390                 $this->mNoGallery = $parserOutput->getNoGallery();
1391                 $this->mHeadItems = array_merge( $this->mHeadItems, $parserOutput->getHeadItems() );
1392                 $this->addModules( $parserOutput->getModules() );
1393
1394                 // Template versioning...
1395                 foreach ( (array)$parserOutput->getTemplateIds() as $ns => $dbks ) {
1396                         if ( isset( $this->mTemplateIds[$ns] ) ) {
1397                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
1398                         } else {
1399                                 $this->mTemplateIds[$ns] = $dbks;
1400                         }
1401                 }
1402                 // File versioning...
1403                 foreach ( (array)$parserOutput->getImageTimeKeys() as $dbk => $data ) {
1404                         $this->mImageTimeKeys[$dbk] = $data;
1405                 }
1406
1407                 // Hooks registered in the object
1408                 global $wgParserOutputHooks;
1409                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
1410                         list( $hookName, $data ) = $hookInfo;
1411                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
1412                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
1413                         }
1414                 }
1415
1416                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
1417         }
1418
1419         /**
1420          * Add a ParserOutput object
1421          *
1422          * @param $parserOutput ParserOutput
1423          */
1424         function addParserOutput( &$parserOutput ) {
1425                 $this->addParserOutputNoText( $parserOutput );
1426                 $text = $parserOutput->getText();
1427                 wfRunHooks( 'OutputPageBeforeHTML', array( &$this, &$text ) );
1428                 $this->addHTML( $text );
1429         }
1430
1431
1432         /**
1433          * Add the output of a QuickTemplate to the output buffer
1434          *
1435          * @param $template QuickTemplate
1436          */
1437         public function addTemplate( &$template ) {
1438                 ob_start();
1439                 $template->execute();
1440                 $this->addHTML( ob_get_contents() );
1441                 ob_end_clean();
1442         }
1443
1444         /**
1445          * Parse wikitext and return the HTML.
1446          *
1447          * @param $text String
1448          * @param $linestart Boolean: is this the start of a line?
1449          * @param $interface Boolean: use interface language ($wgLang instead of
1450          *                   $wgContLang) while parsing language sensitive magic
1451          *                   words like GRAMMAR and PLURAL
1452          * @param $language  Language object: target language object, will override
1453          *                   $interface
1454          * @return String: HTML
1455          */
1456         public function parse( $text, $linestart = true, $interface = false, $language = null ) {
1457                 // Check one for one common cause for parser state resetting
1458                 $callers = wfGetAllCallers( 10 );
1459                 if ( strpos( $callers, 'Parser::extensionSubstitution' ) !== false ) {
1460                         throw new MWException( "wfMsg* function with parsing cannot be used " .
1461                                 "inside a tag hook. Should use parser->recursiveTagParse() instead" );
1462                 }
1463
1464                 global $wgParser;
1465
1466                 if( is_null( $this->getTitle() ) ) {
1467                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
1468                 }
1469
1470                 $popts = $this->parserOptions();
1471                 if ( $interface ) {
1472                         $popts->setInterfaceMessage( true );
1473                 }
1474                 if ( $language !== null ) {
1475                         $oldLang = $popts->setTargetLanguage( $language );
1476                 }
1477
1478                 $parserOutput = $wgParser->parse(
1479                         $text, $this->getTitle(), $popts,
1480                         $linestart, true, $this->mRevisionId
1481                 );
1482
1483                 if ( $interface ) {
1484                         $popts->setInterfaceMessage( false );
1485                 }
1486                 if ( $language !== null ) {
1487                         $popts->setTargetLanguage( $oldLang );
1488                 }
1489
1490                 return $parserOutput->getText();
1491         }
1492
1493         /**
1494          * Parse wikitext, strip paragraphs, and return the HTML.
1495          *
1496          * @param $text String
1497          * @param $linestart Boolean: is this the start of a line?
1498          * @param $interface Boolean: use interface language ($wgLang instead of
1499          *                   $wgContLang) while parsing language sensitive magic
1500          *                   words like GRAMMAR and PLURAL
1501          * @return String: HTML
1502          */
1503         public function parseInline( $text, $linestart = true, $interface = false ) {
1504                 $parsed = $this->parse( $text, $linestart, $interface );
1505
1506                 $m = array();
1507                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
1508                         $parsed = $m[1];
1509                 }
1510
1511                 return $parsed;
1512         }
1513
1514         /**
1515          * Set the value of the "s-maxage" part of the "Cache-control" HTTP header
1516          *
1517          * @param $maxage Integer: maximum cache time on the Squid, in seconds.
1518          */
1519         public function setSquidMaxage( $maxage ) {
1520                 $this->mSquidMaxage = $maxage;
1521         }
1522
1523         /**
1524          * Use enableClientCache(false) to force it to send nocache headers
1525          *
1526          * @param $state ??
1527          */
1528         public function enableClientCache( $state ) {
1529                 return wfSetVar( $this->mEnableClientCache, $state );
1530         }
1531
1532         /**
1533          * Get the list of cookies that will influence on the cache
1534          *
1535          * @return Array
1536          */
1537         function getCacheVaryCookies() {
1538                 global $wgCookiePrefix, $wgCacheVaryCookies;
1539                 static $cookies;
1540                 if ( $cookies === null ) {
1541                         $cookies = array_merge(
1542                                 array(
1543                                         "{$wgCookiePrefix}Token",
1544                                         "{$wgCookiePrefix}LoggedOut",
1545                                         session_name()
1546                                 ),
1547                                 $wgCacheVaryCookies
1548                         );
1549                         wfRunHooks( 'GetCacheVaryCookies', array( $this, &$cookies ) );
1550                 }
1551                 return $cookies;
1552         }
1553
1554         /**
1555          * Return whether this page is not cacheable because "useskin" or "uselang"
1556          * URL parameters were passed.
1557          *
1558          * @return Boolean
1559          */
1560         function uncacheableBecauseRequestVars() {
1561                 $request = $this->getRequest();
1562                 return $request->getText( 'useskin', false ) === false
1563                         && $request->getText( 'uselang', false ) === false;
1564         }
1565
1566         /**
1567          * Check if the request has a cache-varying cookie header
1568          * If it does, it's very important that we don't allow public caching
1569          *
1570          * @return Boolean
1571          */
1572         function haveCacheVaryCookies() {
1573                 $cookieHeader = $this->getRequest()->getHeader( 'cookie' );
1574                 if ( $cookieHeader === false ) {
1575                         return false;
1576                 }
1577                 $cvCookies = $this->getCacheVaryCookies();
1578                 foreach ( $cvCookies as $cookieName ) {
1579                         # Check for a simple string match, like the way squid does it
1580                         if ( strpos( $cookieHeader, $cookieName ) !== false ) {
1581                                 wfDebug( __METHOD__ . ": found $cookieName\n" );
1582                                 return true;
1583                         }
1584                 }
1585                 wfDebug( __METHOD__ . ": no cache-varying cookies found\n" );
1586                 return false;
1587         }
1588
1589         /**
1590          * Add an HTTP header that will influence on the cache
1591          *
1592          * @param $header String: header name
1593          * @param $option Array|null
1594          * @fixme Document the $option parameter; it appears to be for
1595          *        X-Vary-Options but what format is acceptable?
1596          */
1597         public function addVaryHeader( $header, $option = null ) {
1598                 if ( !array_key_exists( $header, $this->mVaryHeader ) ) {
1599                         $this->mVaryHeader[$header] = (array)$option;
1600                 } elseif( is_array( $option ) ) {
1601                         if( is_array( $this->mVaryHeader[$header] ) ) {
1602                                 $this->mVaryHeader[$header] = array_merge( $this->mVaryHeader[$header], $option );
1603                         } else {
1604                                 $this->mVaryHeader[$header] = $option;
1605                         }
1606                 }
1607                 $this->mVaryHeader[$header] = array_unique( $this->mVaryHeader[$header] );
1608         }
1609
1610         /**
1611          * Get a complete X-Vary-Options header
1612          *
1613          * @return String
1614          */
1615         public function getXVO() {
1616                 $cvCookies = $this->getCacheVaryCookies();
1617
1618                 $cookiesOption = array();
1619                 foreach ( $cvCookies as $cookieName ) {
1620                         $cookiesOption[] = 'string-contains=' . $cookieName;
1621                 }
1622                 $this->addVaryHeader( 'Cookie', $cookiesOption );
1623
1624                 $headers = array();
1625                 foreach( $this->mVaryHeader as $header => $option ) {
1626                         $newheader = $header;
1627                         if( is_array( $option ) ) {
1628                                 $newheader .= ';' . implode( ';', $option );
1629                         }
1630                         $headers[] = $newheader;
1631                 }
1632                 $xvo = 'X-Vary-Options: ' . implode( ',', $headers );
1633
1634                 return $xvo;
1635         }
1636
1637         /**
1638          * bug 21672: Add Accept-Language to Vary and XVO headers
1639          * if there's no 'variant' parameter existed in GET.
1640          *
1641          * For example:
1642          *   /w/index.php?title=Main_page should always be served; but
1643          *   /w/index.php?title=Main_page&variant=zh-cn should never be served.
1644          */
1645         function addAcceptLanguage() {
1646                 global $wgContLang;
1647                 if( !$this->getRequest()->getCheck( 'variant' ) && $wgContLang->hasVariants() ) {
1648                         $variants = $wgContLang->getVariants();
1649                         $aloption = array();
1650                         foreach ( $variants as $variant ) {
1651                                 if( $variant === $wgContLang->getCode() ) {
1652                                         continue;
1653                                 } else {
1654                                         $aloption[] = 'string-contains=' . $variant;
1655
1656                                         // IE and some other browsers use another form of language code
1657                                         // in their Accept-Language header, like "zh-CN" or "zh-TW".
1658                                         // We should handle these too.
1659                                         $ievariant = explode( '-', $variant );
1660                                         if ( count( $ievariant ) == 2 ) {
1661                                                 $ievariant[1] = strtoupper( $ievariant[1] );
1662                                                 $ievariant = implode( '-', $ievariant );
1663                                                 $aloption[] = 'string-contains=' . $ievariant;
1664                                         }
1665                                 }
1666                         }
1667                         $this->addVaryHeader( 'Accept-Language', $aloption );
1668                 }
1669         }
1670
1671         /**
1672          * Set a flag which will cause an X-Frame-Options header appropriate for
1673          * edit pages to be sent. The header value is controlled by
1674          * $wgEditPageFrameOptions.
1675          *
1676          * This is the default for special pages. If you display a CSRF-protected
1677          * form on an ordinary view page, then you need to call this function.
1678          */
1679         public function preventClickjacking( $enable = true ) {
1680                 $this->mPreventClickjacking = $enable;
1681         }
1682
1683         /**
1684          * Turn off frame-breaking. Alias for $this->preventClickjacking(false).
1685          * This can be called from pages which do not contain any CSRF-protected
1686          * HTML form.
1687          */
1688         public function allowClickjacking() {
1689                 $this->mPreventClickjacking = false;
1690         }
1691
1692         /**
1693          * Get the X-Frame-Options header value (without the name part), or false
1694          * if there isn't one. This is used by Skin to determine whether to enable
1695          * JavaScript frame-breaking, for clients that don't support X-Frame-Options.
1696          */
1697         public function getFrameOptions() {
1698                 global $wgBreakFrames, $wgEditPageFrameOptions;
1699                 if ( $wgBreakFrames ) {
1700                         return 'DENY';
1701                 } elseif ( $this->mPreventClickjacking && $wgEditPageFrameOptions ) {
1702                         return $wgEditPageFrameOptions;
1703                 }
1704         }
1705
1706         /**
1707          * Send cache control HTTP headers
1708          */
1709         public function sendCacheControl() {
1710                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgUseXVO;
1711
1712                 $response = $this->getRequest()->response();
1713                 if ( $wgUseETag && $this->mETag ) {
1714                         $response->header( "ETag: $this->mETag" );
1715                 }
1716
1717                 $this->addAcceptLanguage();
1718
1719                 # don't serve compressed data to clients who can't handle it
1720                 # maintain different caches for logged-in users and non-logged in ones
1721                 $response->header( 'Vary: ' . join( ', ', array_keys( $this->mVaryHeader ) ) );
1722
1723                 if ( $wgUseXVO ) {
1724                         # Add an X-Vary-Options header for Squid with Wikimedia patches
1725                         $response->header( $this->getXVO() );
1726                 }
1727
1728                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
1729                         if(
1730                                 $wgUseSquid && session_id() == '' && !$this->isPrintable() &&
1731                                 $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies()
1732                         )
1733                         {
1734                                 if ( $wgUseESI ) {
1735                                         # We'll purge the proxy cache explicitly, but require end user agents
1736                                         # to revalidate against the proxy on each visit.
1737                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
1738                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
1739                                         # start with a shorter timeout for initial testing
1740                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
1741                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
1742                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
1743                                 } else {
1744                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
1745                                         # to revalidate against the proxy on each visit.
1746                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
1747                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
1748                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
1749                                         # start with a shorter timeout for initial testing
1750                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
1751                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
1752                                 }
1753                         } else {
1754                                 # We do want clients to cache if they can, but they *must* check for updates
1755                                 # on revisiting the page.
1756                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
1757                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1758                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
1759                         }
1760                         if($this->mLastModified) {
1761                                 $response->header( "Last-Modified: {$this->mLastModified}" );
1762                         }
1763                 } else {
1764                         wfDebug( __METHOD__ . ": no caching **\n", false );
1765
1766                         # In general, the absence of a last modified header should be enough to prevent
1767                         # the client from using its cache. We send a few other things just to make sure.
1768                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1769                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
1770                         $response->header( 'Pragma: no-cache' );
1771                 }
1772         }
1773
1774         /**
1775          * Get the message associed with the HTTP response code $code
1776          *
1777          * @param $code Integer: status code
1778          * @return String or null: message or null if $code is not in the list of
1779          *         messages
1780          */
1781         public static function getStatusMessage( $code ) {
1782                 static $statusMessage = array(
1783                         100 => 'Continue',
1784                         101 => 'Switching Protocols',
1785                         102 => 'Processing',
1786                         200 => 'OK',
1787                         201 => 'Created',
1788                         202 => 'Accepted',
1789                         203 => 'Non-Authoritative Information',
1790                         204 => 'No Content',
1791                         205 => 'Reset Content',
1792                         206 => 'Partial Content',
1793                         207 => 'Multi-Status',
1794                         300 => 'Multiple Choices',
1795                         301 => 'Moved Permanently',
1796                         302 => 'Found',
1797                         303 => 'See Other',
1798                         304 => 'Not Modified',
1799                         305 => 'Use Proxy',
1800                         307 => 'Temporary Redirect',
1801                         400 => 'Bad Request',
1802                         401 => 'Unauthorized',
1803                         402 => 'Payment Required',
1804                         403 => 'Forbidden',
1805                         404 => 'Not Found',
1806                         405 => 'Method Not Allowed',
1807                         406 => 'Not Acceptable',
1808                         407 => 'Proxy Authentication Required',
1809                         408 => 'Request Timeout',
1810                         409 => 'Conflict',
1811                         410 => 'Gone',
1812                         411 => 'Length Required',
1813                         412 => 'Precondition Failed',
1814                         413 => 'Request Entity Too Large',
1815                         414 => 'Request-URI Too Large',
1816                         415 => 'Unsupported Media Type',
1817                         416 => 'Request Range Not Satisfiable',
1818                         417 => 'Expectation Failed',
1819                         422 => 'Unprocessable Entity',
1820                         423 => 'Locked',
1821                         424 => 'Failed Dependency',
1822                         500 => 'Internal Server Error',
1823                         501 => 'Not Implemented',
1824                         502 => 'Bad Gateway',
1825                         503 => 'Service Unavailable',
1826                         504 => 'Gateway Timeout',
1827                         505 => 'HTTP Version Not Supported',
1828                         507 => 'Insufficient Storage'
1829                 );
1830                 return isset( $statusMessage[$code] ) ? $statusMessage[$code] : null;
1831         }
1832
1833         /**
1834          * Finally, all the text has been munged and accumulated into
1835          * the object, let's actually output it:
1836          */
1837         public function output() {
1838                 global $wgOutputEncoding;
1839                 global $wgLanguageCode, $wgDebugRedirects, $wgMimeType;
1840
1841                 if( $this->mDoNothing ) {
1842                         return;
1843                 }
1844
1845                 wfProfileIn( __METHOD__ );
1846
1847                 $response = $this->getRequest()->response();
1848
1849                 if ( $this->mRedirect != '' ) {
1850                         # Standards require redirect URLs to be absolute
1851                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
1852                         if( $this->mRedirectCode == '301' || $this->mRedirectCode == '303' ) {
1853                                 if( !$wgDebugRedirects ) {
1854                                         $message = self::getStatusMessage( $this->mRedirectCode );
1855                                         $response->header( "HTTP/1.1 {$this->mRedirectCode} $message" );
1856                                 }
1857                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
1858                         }
1859                         $this->sendCacheControl();
1860
1861                         $response->header( "Content-Type: text/html; charset=utf-8" );
1862                         if( $wgDebugRedirects ) {
1863                                 $url = htmlspecialchars( $this->mRedirect );
1864                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
1865                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
1866                                 print "</body>\n</html>\n";
1867                         } else {
1868                                 $response->header( 'Location: ' . $this->mRedirect );
1869                         }
1870                         wfProfileOut( __METHOD__ );
1871                         return;
1872                 } elseif ( $this->mStatusCode ) {
1873                         $message = self::getStatusMessage( $this->mStatusCode );
1874                         if ( $message ) {
1875                                 $response->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $message );
1876                         }
1877                 }
1878
1879                 # Buffer output; final headers may depend on later processing
1880                 ob_start();
1881
1882                 $response->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1883                 $response->header( 'Content-language: ' . $wgLanguageCode );
1884
1885                 // Prevent framing, if requested
1886                 $frameOptions = $this->getFrameOptions();
1887                 if ( $frameOptions ) {
1888                         $response->header( "X-Frame-Options: $frameOptions" );
1889                 }
1890
1891                 if ( $this->mArticleBodyOnly ) {
1892                         $this->out( $this->mBodytext );
1893                 } else {
1894                         $this->addDefaultModules();
1895
1896                         $sk = $this->getSkin( $this->getTitle() );
1897
1898                         // Hook that allows last minute changes to the output page, e.g.
1899                         // adding of CSS or Javascript by extensions.
1900                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1901
1902                         wfProfileIn( 'Output-skin' );
1903                         $sk->outputPage( $this );
1904                         wfProfileOut( 'Output-skin' );
1905                 }
1906
1907                 $this->sendCacheControl();
1908                 ob_end_flush();
1909                 wfProfileOut( __METHOD__ );
1910         }
1911
1912         /**
1913          * Actually output something with print(). Performs an iconv to the
1914          * output encoding, if needed.
1915          *
1916          * @param $ins String: the string to output
1917          */
1918         public function out( $ins ) {
1919                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1920                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1921                         $outs = $ins;
1922                 } else {
1923                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1924                         if ( false === $outs ) {
1925                                 $outs = $ins;
1926                         }
1927                 }
1928                 print $outs;
1929         }
1930
1931         /**
1932          * Produce a "user is blocked" page.
1933          *
1934          * @param $return Boolean: whether to have a "return to $wgTitle" message or not.
1935          * @return nothing
1936          */
1937         function blockedPage( $return = true ) {
1938                 global $wgContLang;
1939
1940                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1941                 $this->setRobotPolicy( 'noindex,nofollow' );
1942                 $this->setArticleRelated( false );
1943
1944                 $name = $this->getUser()->blockedBy();
1945                 $reason = $this->getUser()->blockedFor();
1946                 if( $reason == '' ) {
1947                         $reason = wfMsg( 'blockednoreason' );
1948                 }
1949                 $blockTimestamp = $this->getContext()->getLang()->timeanddate(
1950                         wfTimestamp( TS_MW, $this->getUser()->mBlock->mTimestamp ), true
1951                 );
1952                 $ip = wfGetIP();
1953
1954                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1955
1956                 $blockid = $this->getUser()->mBlock->getId();
1957
1958                 $blockExpiry = $this->getContext()->getLang()->formatExpiry( $this->getUser()->mBlock->mExpiry );
1959
1960                 if ( $this->getUser()->mBlock->mAuto ) {
1961                         $msg = 'autoblockedtext';
1962                 } else {
1963                         $msg = 'blockedtext';
1964                 }
1965
1966                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1967                  * This could be a username, an IP range, or a single IP. */
1968                 $intended = $this->getUser()->mBlock->getTarget();
1969
1970                 $this->addWikiMsg(
1971                         $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry,
1972                         $intended, $blockTimestamp
1973                 );
1974
1975                 # Don't auto-return to special pages
1976                 if( $return ) {
1977                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1978                         $this->returnToMain( null, $return );
1979                 }
1980         }
1981
1982         /**
1983          * Output a standard error page
1984          *
1985          * @param $title String: message key for page title
1986          * @param $msg String: message key for page text
1987          * @param $params Array: message parameters
1988          */
1989         public function showErrorPage( $title, $msg, $params = array() ) {
1990                 if ( $this->getTitle() ) {
1991                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1992                 }
1993                 $this->setPageTitle( wfMsg( $title ) );
1994                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1995                 $this->setRobotPolicy( 'noindex,nofollow' );
1996                 $this->setArticleRelated( false );
1997                 $this->enableClientCache( false );
1998                 $this->mRedirect = '';
1999                 $this->mBodytext = '';
2000
2001                 $this->addWikiMsgArray( $msg, $params );
2002
2003                 $this->returnToMain();
2004         }
2005
2006         /**
2007          * Output a standard permission error page
2008          *
2009          * @param $errors Array: error message keys
2010          * @param $action String: action that was denied or null if unknown
2011          */
2012         public function showPermissionsErrorPage( $errors, $action = null ) {
2013                 $this->mDebugtext .= 'Original title: ' .
2014                 $this->getTitle()->getPrefixedText() . "\n";
2015                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
2016                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
2017                 $this->setRobotPolicy( 'noindex,nofollow' );
2018                 $this->setArticleRelated( false );
2019                 $this->enableClientCache( false );
2020                 $this->mRedirect = '';
2021                 $this->mBodytext = '';
2022                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
2023         }
2024
2025         /**
2026          * Display an error page indicating that a given version of MediaWiki is
2027          * required to use it
2028          *
2029          * @param $version Mixed: the version of MediaWiki needed to use the page
2030          */
2031         public function versionRequired( $version ) {
2032                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
2033                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
2034                 $this->setRobotPolicy( 'noindex,nofollow' );
2035                 $this->setArticleRelated( false );
2036                 $this->mBodytext = '';
2037
2038                 $this->addWikiMsg( 'versionrequiredtext', $version );
2039                 $this->returnToMain();
2040         }
2041
2042         /**
2043          * Display an error page noting that a given permission bit is required.
2044          *
2045          * @param $permission String: key required
2046          */
2047         public function permissionRequired( $permission ) {
2048                 $this->setPageTitle( wfMsg( 'badaccess' ) );
2049                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
2050                 $this->setRobotPolicy( 'noindex,nofollow' );
2051                 $this->setArticleRelated( false );
2052                 $this->mBodytext = '';
2053
2054                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
2055                         User::getGroupsWithPermission( $permission ) );
2056                 if( $groups ) {
2057                         $this->addWikiMsg(
2058                                 'badaccess-groups',
2059                                 $this->getContext()->getLang()->commaList( $groups ),
2060                                 count( $groups )
2061                         );
2062                 } else {
2063                         $this->addWikiMsg( 'badaccess-group0' );
2064                 }
2065                 $this->returnToMain();
2066         }
2067
2068         /**
2069          * Produce the stock "please login to use the wiki" page
2070          */
2071         public function loginToUse() {
2072                 if( $this->getUser()->isLoggedIn() ) {
2073                         $this->permissionRequired( 'read' );
2074                         return;
2075                 }
2076
2077                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
2078                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
2079                 $this->setRobotPolicy( 'noindex,nofollow' );
2080                 $this->setArticleRelated( false );
2081
2082                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
2083                 $loginLink = $this->getSkin()->link(
2084                         $loginTitle,
2085                         wfMsgHtml( 'loginreqlink' ),
2086                         array(),
2087                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
2088                         array( 'known', 'noclasses' )
2089                 );
2090                 $this->addWikiMsgArray( 'loginreqpagetext', array( $loginLink ), array( 'replaceafter' ) );
2091                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . '-->' );
2092
2093                 # Don't return to the main page if the user can't read it
2094                 # otherwise we'll end up in a pointless loop
2095                 $mainPage = Title::newMainPage();
2096                 if( $mainPage->userCanRead() ) {
2097                         $this->returnToMain( null, $mainPage );
2098                 }
2099         }
2100
2101         /**
2102          * Format a list of error messages
2103          *
2104          * @param $errors Array of arrays returned by Title::getUserPermissionsErrors
2105          * @param $action String: action that was denied or null if unknown
2106          * @return String: the wikitext error-messages, formatted into a list.
2107          */
2108         public function formatPermissionsErrorMessage( $errors, $action = null ) {
2109                 if ( $action == null ) {
2110                         $text = wfMsgNoTrans( 'permissionserrorstext', count( $errors ) ) . "\n\n";
2111                 } else {
2112                         $action_desc = wfMsgNoTrans( "action-$action" );
2113                         $text = wfMsgNoTrans(
2114                                 'permissionserrorstext-withaction',
2115                                 count( $errors ),
2116                                 $action_desc
2117                         ) . "\n\n";
2118                 }
2119
2120                 if ( count( $errors ) > 1 ) {
2121                         $text .= '<ul class="permissions-errors">' . "\n";
2122
2123                         foreach( $errors as $error ) {
2124                                 $text .= '<li>';
2125                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
2126                                 $text .= "</li>\n";
2127                         }
2128                         $text .= '</ul>';
2129                 } else {
2130                         $text .= "<div class=\"permissions-errors\">\n" .
2131                                         call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) .
2132                                         "\n</div>";
2133                 }
2134
2135                 return $text;
2136         }
2137
2138         /**
2139          * Display a page stating that the Wiki is in read-only mode,
2140          * and optionally show the source of the page that the user
2141          * was trying to edit.  Should only be called (for this
2142          * purpose) after wfReadOnly() has returned true.
2143          *
2144          * For historical reasons, this function is _also_ used to
2145          * show the error message when a user tries to edit a page
2146          * they are not allowed to edit.  (Unless it's because they're
2147          * blocked, then we show blockedPage() instead.)  In this
2148          * case, the second parameter should be set to true and a list
2149          * of reasons supplied as the third parameter.
2150          *
2151          * @todo Needs to be split into multiple functions.
2152          *
2153          * @param $source    String: source code to show (or null).
2154          * @param $protected Boolean: is this a permissions error?
2155          * @param $reasons   Array: list of reasons for this error, as returned by Title::getUserPermissionsErrors().
2156          * @param $action    String: action that was denied or null if unknown
2157          */
2158         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
2159                 $this->setRobotPolicy( 'noindex,nofollow' );
2160                 $this->setArticleRelated( false );
2161
2162                 // If no reason is given, just supply a default "I can't let you do
2163                 // that, Dave" message.  Should only occur if called by legacy code.
2164                 if ( $protected && empty( $reasons ) ) {
2165                         $reasons[] = array( 'badaccess-group0' );
2166                 }
2167
2168                 if ( !empty( $reasons ) ) {
2169                         // Permissions error
2170                         if( $source ) {
2171                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
2172                                 $this->setSubtitle(
2173                                         wfMsg( 'viewsourcefor', $this->getSkin()->linkKnown( $this->getTitle() ) )
2174                                 );
2175                         } else {
2176                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
2177                         }
2178                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
2179                 } else {
2180                         // Wiki is read only
2181                         $this->setPageTitle( wfMsg( 'readonly' ) );
2182                         $reason = wfReadOnlyReason();
2183                         $this->wrapWikiMsg( "<div class='mw-readonly-error'>\n$1\n</div>", array( 'readonlytext', $reason ) );
2184                 }
2185
2186                 // Show source, if supplied
2187                 if( is_string( $source ) ) {
2188                         $this->addWikiMsg( 'viewsourcetext' );
2189
2190                         $params = array(
2191                                 'id'   => 'wpTextbox1',
2192                                 'name' => 'wpTextbox1',
2193                                 'cols' => $this->getUser()->getOption( 'cols' ),
2194                                 'rows' => $this->getUser()->getOption( 'rows' ),
2195                                 'readonly' => 'readonly'
2196                         );
2197                         $this->addHTML( Html::element( 'textarea', $params, $source ) );
2198
2199                         // Show templates used by this article
2200                         $skin = $this->getSkin();
2201                         $article = new Article( $this->getTitle() );
2202                         $this->addHTML( "<div class='templatesUsed'>
2203 {$skin->formatTemplates( $article->getUsedTemplates() )}
2204 </div>
2205 " );
2206                 }
2207
2208                 # If the title doesn't exist, it's fairly pointless to print a return
2209                 # link to it.  After all, you just tried editing it and couldn't, so
2210                 # what's there to do there?
2211                 if( $this->getTitle()->exists() ) {
2212                         $this->returnToMain( null, $this->getTitle() );
2213                 }
2214         }
2215
2216         /**
2217          * Adds JS-based password security checker
2218          * @param $passwordId String ID of input box containing password
2219          * @param $retypeId String ID of input box containing retyped password
2220          * @return none
2221          */
2222         public function addPasswordSecurity( $passwordId, $retypeId ) {
2223                 $data = array(
2224                         'password' => '#' . $passwordId,
2225                         'retype' => '#' . $retypeId,
2226                         'messages' => array(),
2227                 );
2228                 foreach ( array( 'password-strength', 'password-strength-bad', 'password-strength-mediocre',
2229                                 'password-strength-acceptable', 'password-strength-good', 'password-retype', 'password-retype-mismatch'
2230                         ) as $message ) {
2231                         $data['messages'][$message] = wfMsg( $message );
2232                 }
2233                 $this->addScript( Html::inlineScript( 'var passwordSecurity=' . FormatJson::encode( $data ) ) );
2234                 $this->addModules( 'mediawiki.legacy.password' );
2235         }
2236
2237         public function showFatalError( $message ) {
2238                 $this->setPageTitle( wfMsg( 'internalerror' ) );
2239                 $this->setRobotPolicy( 'noindex,nofollow' );
2240                 $this->setArticleRelated( false );
2241                 $this->enableClientCache( false );
2242                 $this->mRedirect = '';
2243                 $this->mBodytext = $message;
2244         }
2245
2246         public function showUnexpectedValueError( $name, $val ) {
2247                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
2248         }
2249
2250         public function showFileCopyError( $old, $new ) {
2251                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
2252         }
2253
2254         public function showFileRenameError( $old, $new ) {
2255                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
2256         }
2257
2258         public function showFileDeleteError( $name ) {
2259                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
2260         }
2261
2262         public function showFileNotFoundError( $name ) {
2263                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
2264         }
2265
2266         /**
2267          * Add a "return to" link pointing to a specified title
2268          *
2269          * @param $title Title to link
2270          * @param $query String: query string
2271          * @param $text String text of the link (input is not escaped)
2272          */
2273         public function addReturnTo( $title, $query = array(), $text = null ) {
2274                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullURL() ) );
2275                 $link = wfMsgHtml(
2276                         'returnto',
2277                         $this->getSkin()->link( $title, $text, array(), $query )
2278                 );
2279                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
2280         }
2281
2282         /**
2283          * Add a "return to" link pointing to a specified title,
2284          * or the title indicated in the request, or else the main page
2285          *
2286          * @param $unused No longer used
2287          * @param $returnto Title or String to return to
2288          * @param $returntoquery String: query string for the return to link
2289          */
2290         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
2291                 if ( $returnto == null ) {
2292                         $returnto = $this->getRequest()->getText( 'returnto' );
2293                 }
2294
2295                 if ( $returntoquery == null ) {
2296                         $returntoquery = $this->getRequest()->getText( 'returntoquery' );
2297                 }
2298
2299                 if ( $returnto === '' ) {
2300                         $returnto = Title::newMainPage();
2301                 }
2302
2303                 if ( is_object( $returnto ) ) {
2304                         $titleObj = $returnto;
2305                 } else {
2306                         $titleObj = Title::newFromText( $returnto );
2307                 }
2308                 if ( !is_object( $titleObj ) ) {
2309                         $titleObj = Title::newMainPage();
2310                 }
2311
2312                 $this->addReturnTo( $titleObj, $returntoquery );
2313         }
2314
2315         /**
2316          * @param $sk Skin The given Skin
2317          * @param $includeStyle Boolean: unused
2318          * @return String: The doctype, opening <html>, and head element.
2319          */
2320         public function headElement( Skin $sk, $includeStyle = true ) {
2321                 global $wgOutputEncoding, $wgMimeType;
2322                 global $wgUseTrackbacks, $wgHtml5;
2323
2324                 if ( $sk->commonPrintStylesheet() ) {
2325                         $this->addModuleStyles( 'mediawiki.legacy.wikiprintable' );
2326                 }
2327                 $sk->setupUserCss( $this );
2328
2329                 $lang = wfUILang();
2330                 $ret = Html::htmlHeader( array( 'lang' => $lang->getCode(), 'dir' => $lang->getDir() ) );
2331
2332                 if ( $this->getHTMLTitle() == '' ) {
2333                         $this->setHTMLTitle( wfMsg( 'pagetitle', $this->getPageTitle() ) );
2334                 }
2335
2336                 $openHead = Html::openElement( 'head' );
2337                 if ( $openHead ) {
2338                         # Don't bother with the newline if $head == ''
2339                         $ret .= "$openHead\n";
2340                 }
2341
2342                 $ret .= Html::element( 'title', null, $this->getHTMLTitle() ) . "\n";
2343
2344                 $ret .= implode( "\n", array(
2345                         $this->getHeadLinks( $sk, true ),
2346                         $this->buildCssLinks( $sk ),
2347                         $this->getHeadItems()
2348                 ) );
2349
2350                 if ( $wgUseTrackbacks && $this->isArticleRelated() ) {
2351                         $ret .= $this->getTitle()->trackbackRDF();
2352                 }
2353
2354                 $closeHead = Html::closeElement( 'head' );
2355                 if ( $closeHead ) {
2356                         $ret .= "$closeHead\n";
2357                 }
2358
2359                 $bodyAttrs = array();
2360
2361                 # Crazy edit-on-double-click stuff
2362                 $action = $this->getRequest()->getVal( 'action', 'view' );
2363
2364                 if (
2365                         $this->getTitle()->getNamespace() != NS_SPECIAL &&
2366                         in_array( $action, array( 'view', 'purge' ) ) &&
2367                         $this->getUser()->getOption( 'editondblclick' )
2368                 )
2369                 {
2370                         $bodyAttrs['ondblclick'] = "document.location = '" . Xml::escapeJsString( $this->getTitle()->getEditURL() ) . "'";
2371                 }
2372
2373                 # Class bloat
2374                 $dir = wfUILang()->getDir();
2375                 $bodyAttrs['class'] = "mediawiki $dir";
2376
2377                 if ( $this->getContext()->getLang()->capitalizeAllNouns() ) {
2378                         # A <body> class is probably not the best way to do this . . .
2379                         $bodyAttrs['class'] .= ' capitalize-all-nouns';
2380                 }
2381                 $bodyAttrs['class'] .= ' ' . $sk->getPageClasses( $this->getTitle() );
2382                 $bodyAttrs['class'] .= ' skin-' . Sanitizer::escapeClass( $sk->getSkinName() );
2383
2384                 $sk->addToBodyAttributes( $this, $bodyAttrs ); // Allow skins to add body attributes they need
2385                 wfRunHooks( 'OutputPageBodyAttributes', array( $this, $sk, &$bodyAttrs ) );
2386
2387                 $ret .= Html::openElement( 'body', $bodyAttrs ) . "\n";
2388
2389                 return $ret;
2390         }
2391
2392         /**
2393          * Add the default ResourceLoader modules to this object
2394          */
2395         private function addDefaultModules() {
2396                 global $wgIncludeLegacyJavaScript,
2397                         $wgUseAjax, $wgAjaxWatch, $wgEnableMWSuggest;
2398
2399                 // Add base resources
2400                 $this->addModules( 'mediawiki.util' );
2401                 if( $wgIncludeLegacyJavaScript ){
2402                         $this->addModules( 'mediawiki.legacy.wikibits' );
2403                 }
2404
2405                 // Add various resources if required
2406                 if ( $wgUseAjax ) {
2407                         $this->addModules( 'mediawiki.legacy.ajax' );
2408
2409                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
2410
2411                         if( $wgAjaxWatch && $this->getUser()->isLoggedIn() ) {
2412                                 $this->addModules( 'mediawiki.action.watch.ajax' );
2413                         }
2414
2415                         if ( $wgEnableMWSuggest && !$this->getUser()->getOption( 'disablesuggest', false ) ) {
2416                                 $this->addModules( 'mediawiki.legacy.mwsuggest' );
2417                         }
2418                 }
2419
2420                 if( $this->getUser()->getBoolOption( 'editsectiononrightclick' ) ) {
2421                         $this->addModules( 'mediawiki.action.view.rightClickEdit' );
2422                 }
2423         }
2424
2425         /**
2426          * Get a ResourceLoader object associated with this OutputPage
2427          *
2428          * @return ResourceLoader
2429          */
2430         public function getResourceLoader() {
2431                 if ( is_null( $this->mResourceLoader ) ) {
2432                         $this->mResourceLoader = new ResourceLoader();
2433                 }
2434                 return $this->mResourceLoader;
2435         }
2436
2437         /**
2438          * TODO: Document
2439          * @param $skin Skin
2440          * @param $modules Array/string with the module name
2441          * @param $only String ResourceLoaderModule TYPE_ class constant
2442          * @param $useESI boolean
2443          * @return string html <script> and <style> tags
2444          */
2445         protected function makeResourceLoaderLink( Skin $skin, $modules, $only, $useESI = false ) {
2446                 global $wgLoadScript, $wgResourceLoaderUseESI,
2447                         $wgResourceLoaderInlinePrivateModules;
2448                 // Lazy-load ResourceLoader
2449                 // TODO: Should this be a static function of ResourceLoader instead?
2450                 // TODO: Divide off modules starting with "user", and add the user parameter to them
2451                 $baseQuery = array(
2452                         'lang' => $this->getContext()->getLang()->getCode(),
2453                         'debug' => ResourceLoader::inDebugMode() ? 'true' : 'false',
2454                         'skin' => $skin->getSkinName(),
2455                         'only' => $only,
2456                 );
2457                 // Propagate printable and handheld parameters if present
2458                 if ( $this->isPrintable() ) {
2459                         $baseQuery['printable'] = 1;
2460                 }
2461                 if ( $this->getRequest()->getBool( 'handheld' ) ) {
2462                         $baseQuery['handheld'] = 1;
2463                 }
2464
2465                 if ( !count( $modules ) ) {
2466                         return '';
2467                 }
2468
2469                 if ( count( $modules ) > 1 ) {
2470                         // Remove duplicate module requests
2471                         $modules = array_unique( (array) $modules );
2472                         // Sort module names so requests are more uniform
2473                         sort( $modules );
2474
2475                         if ( ResourceLoader::inDebugMode() ) {
2476                                 // Recursively call us for every item
2477                                 $links = '';
2478                                 foreach ( $modules as $name ) {
2479                                         $links .= $this->makeResourceLoaderLink( $skin, $name, $only, $useESI );
2480                                 }
2481                                 return $links;
2482                         }
2483                 }
2484
2485                 // Create keyed-by-group list of module objects from modules list
2486                 $groups = array();
2487                 $resourceLoader = $this->getResourceLoader();
2488                 foreach ( (array) $modules as $name ) {
2489                         $module = $resourceLoader->getModule( $name );
2490                         # Check that we're allowed to include this module on this page
2491                         if ( ( $module->getOrigin() > $this->getAllowedModules( ResourceLoaderModule::TYPE_SCRIPTS )
2492                                         && $only == ResourceLoaderModule::TYPE_SCRIPTS )
2493                                 || ( $module->getOrigin() > $this->getAllowedModules( ResourceLoaderModule::TYPE_STYLES )
2494                                         && $only == ResourceLoaderModule::TYPE_STYLES )
2495                                 )
2496                         {
2497                                 continue;
2498                         }
2499
2500                         $group = $module->getGroup();
2501                         if ( !isset( $groups[$group] ) ) {
2502                                 $groups[$group] = array();
2503                         }
2504                         $groups[$group][$name] = $module;
2505                 }
2506
2507                 $links = '';
2508                 foreach ( $groups as $group => $modules ) {
2509                         $query = $baseQuery;
2510                         // Special handling for user-specific groups
2511                         if ( ( $group === 'user' || $group === 'private' ) && $this->getUser()->isLoggedIn() ) {
2512                                 $query['user'] = $this->getUser()->getName();
2513                         }
2514
2515                         // Create a fake request based on the one we are about to make so modules return
2516                         // correct timestamp and emptiness data
2517                         $context = new ResourceLoaderContext( $resourceLoader, new FauxRequest( $query ) );
2518                         // Drop modules that know they're empty
2519                         foreach ( $modules as $key => $module ) {
2520                                 if ( $module->isKnownEmpty( $context ) ) {
2521                                         unset( $modules[$key] );
2522                                 }
2523                         }
2524                         // If there are no modules left, skip this group
2525                         if ( $modules === array() ) {
2526                                 continue;
2527                         }
2528
2529                         $query['modules'] = implode( '|', array_keys( $modules ) );
2530
2531                         // Support inlining of private modules if configured as such
2532                         if ( $group === 'private' && $wgResourceLoaderInlinePrivateModules ) {
2533                                 if ( $only == ResourceLoaderModule::TYPE_STYLES ) {
2534                                         $links .= Html::inlineStyle(
2535                                                 $resourceLoader->makeModuleResponse( $context, $modules )
2536                                         );
2537                                 } else {
2538                                         $links .= Html::inlineScript(
2539                                                 ResourceLoader::makeLoaderConditionalScript(
2540                                                         $resourceLoader->makeModuleResponse( $context, $modules )
2541                                                 )
2542                                         );
2543                                 }
2544                                 continue;
2545                         }
2546                         // Special handling for the user group; because users might change their stuff
2547                         // on-wiki like user pages, or user preferences; we need to find the highest
2548                         // timestamp of these user-changable modules so we can ensure cache misses on change
2549                         // This should NOT be done for the site group (bug 27564) because anons get that too
2550                         // and we shouldn't be putting timestamps in Squid-cached HTML
2551                         if ( $group === 'user' ) {
2552                                 // Get the maximum timestamp
2553                                 $timestamp = 1;
2554                                 foreach ( $modules as $module ) {
2555                                         $timestamp = max( $timestamp, $module->getModifiedTime( $context ) );
2556                                 }
2557                                 // Add a version parameter so cache will break when things change
2558                                 $query['version'] = wfTimestamp( TS_ISO_8601_BASIC, $timestamp );
2559                         }
2560                         // Make queries uniform in order
2561                         ksort( $query );
2562
2563                         $url = wfAppendQuery( $wgLoadScript, $query );
2564                         if ( $useESI && $wgResourceLoaderUseESI ) {
2565                                 $esi = Xml::element( 'esi:include', array( 'src' => $url ) );
2566                                 if ( $only == ResourceLoaderModule::TYPE_STYLES ) {
2567                                         $link = Html::inlineStyle( $esi );
2568                                 } else {
2569                                         $link = Html::inlineScript( $esi );
2570                                 }
2571                         } else {
2572                                 // Automatically select style/script elements
2573                                 if ( $only === ResourceLoaderModule::TYPE_STYLES ) {
2574                                         $link = Html::linkedStyle( wfAppendQuery( $wgLoadScript, $query ) );
2575                                 } else {
2576                                         $link = Html::linkedScript( wfAppendQuery( $wgLoadScript, $query ) );
2577                                 }
2578                         }
2579
2580                         if( $group == 'noscript' ){
2581                                 $links .= Html::rawElement( 'noscript', array(), $link ) . "\n";
2582                         } else {
2583                                 $links .= $link . "\n";
2584                         }
2585                 }
2586                 return $links;
2587         }
2588
2589         /**
2590          * Gets the global variables and mScripts; also adds userjs to the end if
2591          * enabled. Despite the name, these scripts are no longer put in the
2592          * <head> but at the bottom of the <body>
2593          *
2594          * @param $sk Skin object to use
2595          * @return String: HTML fragment
2596          */
2597         function getHeadScripts( Skin $sk ) {
2598                 global $wgUseSiteJs, $wgAllowUserJs;
2599
2600                 // Startup - this will immediately load jquery and mediawiki modules
2601                 $scripts = $this->makeResourceLoaderLink( $sk, 'startup', ResourceLoaderModule::TYPE_SCRIPTS, true );
2602
2603                 // Script and Messages "only" requests
2604                 $scripts .= $this->makeResourceLoaderLink( $sk, $this->getModuleScripts( true ), ResourceLoaderModule::TYPE_SCRIPTS );
2605                 $scripts .= $this->makeResourceLoaderLink( $sk, $this->getModuleMessages( true ), ResourceLoaderModule::TYPE_MESSAGES );
2606
2607                 // Modules requests - let the client calculate dependencies and batch requests as it likes
2608                 $loader = '';
2609                 if ( $this->getModules( true ) ) {
2610                         $loader = Xml::encodeJsCall( 'mw.loader.load', array( $this->getModules( true ) ) ) .
2611                                 Xml::encodeJsCall( 'mw.loader.go', array() );
2612                 }
2613
2614                 $scripts .= Html::inlineScript(
2615                         ResourceLoader::makeLoaderConditionalScript(
2616                                 ResourceLoader::makeConfigSetScript( $this->getJSVars() ) . $loader
2617                         )
2618                 );
2619
2620                 // Legacy Scripts
2621                 $scripts .= "\n" . $this->mScripts;
2622
2623                 $userScripts = array( 'user.options' );
2624
2625                 // Add site JS if enabled
2626                 if ( $wgUseSiteJs ) {
2627                         $scripts .= $this->makeResourceLoaderLink( $sk, 'site', ResourceLoaderModule::TYPE_SCRIPTS );
2628                         if( $this->getUser()->isLoggedIn() ){
2629                                 $userScripts[] = 'user.groups';
2630                         }
2631                 }
2632
2633                 // Add user JS if enabled
2634                 if ( $wgAllowUserJs && $this->getUser()->isLoggedIn() ) {
2635                         $action = $this->getRequest()->getVal( 'action', 'view' );
2636                         if( $this->getTitle() && $this->getTitle()->isJsSubpage() && $sk->userCanPreview( $action ) ) {
2637                                 # XXX: additional security check/prompt?
2638                                 $scripts .= Html::inlineScript( "\n" . $this->getRequest()->getText( 'wpTextbox1' ) . "\n" ) . "\n";
2639                         } else {
2640                                 # FIXME: this means that User:Me/Common.js doesn't load when previewing
2641                                 # User:Me/Vector.js, and vice versa (bug26283)
2642                                 $userScripts[] = 'user';
2643                         }
2644                 }
2645                 $scripts .= $this->makeResourceLoaderLink( $sk, $userScripts, ResourceLoaderModule::TYPE_SCRIPTS );
2646
2647                 return $scripts;
2648         }
2649
2650         /**
2651          * Get an array containing global JS variables
2652          *
2653          * Do not add things here which can be evaluated in
2654          * ResourceLoaderStartupScript - in other words, without state.
2655          * You will only be adding bloat to the page and causing page caches to
2656          * have to be purged on configuration changes.
2657          */
2658         protected function getJSVars() {
2659                 global $wgUseAjax, $wgEnableMWSuggest, $wgContLang;
2660
2661                 $title = $this->getTitle();
2662                 $ns = $title->getNamespace();
2663                 $nsname = MWNamespace::exists( $ns ) ? MWNamespace::getCanonicalName( $ns ) : $title->getNsText();
2664                 if ( $ns == NS_SPECIAL ) {
2665                         $parts = SpecialPage::resolveAliasWithSubpage( $title->getDBkey() );
2666                         $canonicalName = $parts[0];
2667                 } else {
2668                         $canonicalName = false; # bug 21115
2669                 }
2670
2671                 $vars = array(
2672                         'wgCanonicalNamespace' => $nsname,
2673                         'wgCanonicalSpecialPageName' => $canonicalName,
2674                         'wgNamespaceNumber' => $title->getNamespace(),
2675                         'wgPageName' => $title->getPrefixedDBKey(),
2676                         'wgTitle' => $title->getText(),
2677                         'wgCurRevisionId' => $title->getLatestRevID(),
2678                         'wgArticleId' => $title->getArticleId(),
2679                         'wgIsArticle' => $this->isArticle(),
2680                         'wgAction' => $this->getRequest()->getText( 'action', 'view' ),
2681                         'wgUserName' => $this->getUser()->isAnon() ? null : $this->getUser()->getName(),
2682                         'wgUserGroups' => $this->getUser()->getEffectiveGroups(),
2683                         'wgCategories' => $this->getCategories(),
2684                         'wgBreakFrames' => $this->getFrameOptions() == 'DENY',
2685                 );
2686                 if ( $wgContLang->hasVariants() ) {
2687                         $vars['wgUserVariant'] = $wgContLang->getPreferredVariant();
2688                 }
2689                 foreach ( $title->getRestrictionTypes() as $type ) {
2690                         $vars['wgRestriction' . ucfirst( $type )] = $title->getRestrictions( $type );
2691                 }
2692                 if ( $wgUseAjax && $wgEnableMWSuggest && !$this->getUser()->getOption( 'disablesuggest', false ) ) {
2693                         $vars['wgSearchNamespaces'] = SearchEngine::userNamespaces( $this->getUser() );
2694                 }
2695
2696                 // Allow extensions to add their custom variables to the global JS variables
2697                 wfRunHooks( 'MakeGlobalVariablesScript', array( &$vars ) );
2698
2699                 return $vars;
2700         }
2701
2702         /**
2703          * @return string HTML tag links to be put in the header.
2704          */
2705         public function getHeadLinks( Skin $sk, $addContentType = false ) {
2706                 global $wgUniversalEditButton, $wgFavicon, $wgAppleTouchIcon, $wgEnableAPI,
2707                         $wgSitename, $wgVersion, $wgHtml5, $wgMimeType, $wgOutputEncoding,
2708                         $wgFeed, $wgOverrideSiteFeed, $wgAdvertisedFeedTypes,
2709                         $wgEnableDublinCoreRdf, $wgEnableCreativeCommonsRdf,
2710                         $wgDisableLangConversion, $wgCanonicalLanguageLinks, $wgContLang,
2711                         $wgRightsPage, $wgRightsUrl;
2712
2713                 $tags = array();
2714
2715                 if ( $addContentType ) {
2716                         if ( $wgHtml5 ) {
2717                                 # More succinct than <meta http-equiv=Content-Type>, has the
2718                                 # same effect
2719                                 $tags[] = Html::element( 'meta', array( 'charset' => $wgOutputEncoding ) );
2720                         } else {
2721                                 $tags[] = Html::element( 'meta', array(
2722                                         'http-equiv' => 'Content-Type',
2723                                         'content' => "$wgMimeType; charset=$wgOutputEncoding"
2724                                 ) );
2725                                 $tags[] = Html::element( 'meta', array(  // bug 15835
2726                                         'http-equiv' => 'Content-Style-Type',
2727                                         'content' => 'text/css'
2728                                 ) );
2729                         }
2730                 }
2731
2732                 $tags[] = Html::element( 'meta', array(
2733                         'name' => 'generator',
2734                         'content' => "MediaWiki $wgVersion",
2735                 ) );
2736
2737                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
2738                 if( $p !== 'index,follow' ) {
2739                         // http://www.robotstxt.org/wc/meta-user.html
2740                         // Only show if it's different from the default robots policy
2741                         $tags[] = Html::element( 'meta', array(
2742                                 'name' => 'robots',
2743                                 'content' => $p,
2744                         ) );
2745                 }
2746
2747                 if ( count( $this->mKeywords ) > 0 ) {
2748                         $strip = array(
2749                                 "/<.*?" . ">/" => '',
2750                                 "/_/" => ' '
2751                         );
2752                         $tags[] = Html::element( 'meta', array(
2753                                 'name' => 'keywords',
2754                                 'content' =>  preg_replace(
2755                                         array_keys( $strip ),
2756                                         array_values( $strip ),
2757                                         implode( ',', $this->mKeywords )
2758                                 )
2759                         ) );
2760                 }
2761
2762                 foreach ( $this->mMetatags as $tag ) {
2763                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
2764                                 $a = 'http-equiv';
2765                                 $tag[0] = substr( $tag[0], 5 );
2766                         } else {
2767                                 $a = 'name';
2768                         }
2769                         $tags[] = Html::element( 'meta',
2770                                 array(
2771                                         $a => $tag[0],
2772                                         'content' => $tag[1]
2773                                 )
2774                         );
2775                 }
2776
2777                 foreach ( $this->mLinktags as $tag ) {
2778                         $tags[] = Html::element( 'link', $tag );
2779                 }
2780
2781                 # Universal edit button
2782                 if ( $wgUniversalEditButton ) {
2783                         if ( $this->isArticleRelated() && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
2784                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
2785                                 // Original UniversalEditButton
2786                                 $msg = wfMsg( 'edit' );
2787                                 $tags[] = Html::element( 'link', array(
2788                                         'rel' => 'alternate',
2789                                         'type' => 'application/x-wiki',
2790                                         'title' => $msg,
2791                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
2792                                 ) );
2793                                 // Alternate edit link
2794                                 $tags[] = Html::element( 'link', array(
2795                                         'rel' => 'edit',
2796                                         'title' => $msg,
2797                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
2798                                 ) );
2799                         }
2800                 }
2801
2802                 # Generally the order of the favicon and apple-touch-icon links
2803                 # should not matter, but Konqueror (3.5.9 at least) incorrectly
2804                 # uses whichever one appears later in the HTML source. Make sure
2805                 # apple-touch-icon is specified first to avoid this.
2806                 if ( $wgAppleTouchIcon !== false ) {
2807                         $tags[] = Html::element( 'link', array( 'rel' => 'apple-touch-icon', 'href' => $wgAppleTouchIcon ) );
2808                 }
2809
2810                 if ( $wgFavicon !== false ) {
2811                         $tags[] = Html::element( 'link', array( 'rel' => 'shortcut icon', 'href' => $wgFavicon ) );
2812                 }
2813
2814                 # OpenSearch description link
2815                 $tags[] = Html::element( 'link', array(
2816                         'rel' => 'search',
2817                         'type' => 'application/opensearchdescription+xml',
2818                         'href' => wfScript( 'opensearch_desc' ),
2819                         'title' => wfMsgForContent( 'opensearch-desc' ),
2820                 ) );
2821
2822                 if ( $wgEnableAPI ) {
2823                         # Real Simple Discovery link, provides auto-discovery information
2824                         # for the MediaWiki API (and potentially additional custom API
2825                         # support such as WordPress or Twitter-compatible APIs for a
2826                         # blogging extension, etc)
2827                         $tags[] = Html::element( 'link', array(
2828                                 'rel' => 'EditURI',
2829                                 'type' => 'application/rsd+xml',
2830                                 'href' => wfExpandUrl( wfAppendQuery( wfScript( 'api' ), array( 'action' => 'rsd' ) ) ),
2831                         ) );
2832                 }
2833
2834                 # Metadata links
2835                 # - Creative Commons
2836                 #   See http://wiki.creativecommons.org/Extend_Metadata.
2837                 # - Dublin Core
2838                 #   Use hreflang to specify canonical and alternate links
2839                 #   See http://www.google.com/support/webmasters/bin/answer.py?answer=189077
2840                 if ( $this->isArticleRelated() ) {
2841                         # note: buggy CC software only reads first "meta" link
2842                         if ( $wgEnableCreativeCommonsRdf ) {
2843                                 $tags[] = Html::element( 'link', array(
2844                                         'rel' => $this->getMetadataAttribute(),
2845                                         'title' => 'Creative Commons',
2846                                         'type' => 'application/rdf+xml',
2847                                         'href' => $this->getTitle()->getLocalURL( 'action=creativecommons' ) )
2848                                 );
2849                         }
2850
2851                         if ( $wgEnableDublinCoreRdf ) {
2852                                 $tags[] = Html::element( 'link', array(
2853                                         'rel' => $this->getMetadataAttribute(),
2854                                         'title' => 'Dublin Core',
2855                                         'type' => 'application/rdf+xml',
2856                                         'href' => $this->getTitle()->getLocalURL( 'action=dublincore' ) )
2857                                 );
2858                         }
2859                 }
2860
2861                 # Language variants
2862                 if ( !$wgDisableLangConversion && $wgCanonicalLanguageLinks
2863                         && $wgContLang->hasVariants() ) {
2864
2865                         $urlvar = $wgContLang->getURLVariant();
2866
2867                         if ( !$urlvar ) {
2868                                 $variants = $wgContLang->getVariants();
2869                                 foreach ( $variants as $_v ) {
2870                                         $tags[] = Html::element( 'link', array(
2871                                                 'rel' => 'alternate',
2872                                                 'hreflang' => $_v,
2873                                                 'href' => $this->getTitle()->getLocalURL( '', $_v ) )
2874                                         );
2875                                 }
2876                         } else {
2877                                 $tags[] = Html::element( 'link', array(
2878                                         'rel' => 'canonical',
2879                                         'href' => $this->getTitle()->getFullURL() )
2880                                 );
2881                         }
2882                 }
2883
2884                 # Copyright
2885                 $copyright = '';
2886                 if ( $wgRightsPage ) {
2887                         $copy = Title::newFromText( $wgRightsPage );
2888
2889                         if ( $copy ) {
2890                                 $copyright = $copy->getLocalURL();
2891                         }
2892                 }
2893
2894                 if ( !$copyright && $wgRightsUrl ) {
2895                         $copyright = $wgRightsUrl;
2896                 }
2897
2898                 if ( $copyright ) {
2899                         $tags[] = Html::element( 'link', array(
2900                                 'rel' => 'copyright',
2901                                 'href' => $copyright )
2902                         );
2903                 }
2904
2905                 # Feeds
2906                 if ( $wgFeed ) {
2907                         foreach( $this->getSyndicationLinks() as $format => $link ) {
2908                                 # Use the page name for the title (accessed through $wgTitle since
2909                                 # there's no other way).  In principle, this could lead to issues
2910                                 # with having the same name for different feeds corresponding to
2911                                 # the same page, but we can't avoid that at this low a level.
2912
2913                                 $tags[] = $this->feedLink(
2914                                         $format,
2915                                         $link,
2916                                         # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
2917                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() )
2918                                 );
2919                         }
2920
2921                         # Recent changes feed should appear on every page (except recentchanges,
2922                         # that would be redundant). Put it after the per-page feed to avoid
2923                         # changing existing behavior. It's still available, probably via a
2924                         # menu in your browser. Some sites might have a different feed they'd
2925                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
2926                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
2927                         # If so, use it instead.
2928
2929                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
2930
2931                         if ( $wgOverrideSiteFeed ) {
2932                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
2933                                         $tags[] = $this->feedLink(
2934                                                 $type,
2935                                                 htmlspecialchars( $feedUrl ),
2936                                                 wfMsg( "site-{$type}-feed", $wgSitename )
2937                                         );
2938                                 }
2939                         } elseif ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
2940                                 foreach ( $wgAdvertisedFeedTypes as $format ) {
2941                                         $tags[] = $this->feedLink(
2942                                                 $format,
2943                                                 $rctitle->getLocalURL( "feed={$format}" ),
2944                                                 wfMsg( "site-{$format}-feed", $wgSitename ) # For grep: 'site-rss-feed', 'site-atom-feed'.
2945                                         );
2946                                 }
2947                         }
2948                 }
2949                 return implode( "\n", $tags );
2950         }
2951
2952         /**
2953          * Generate a <link rel/> for a feed.
2954          *
2955          * @param $type String: feed type
2956          * @param $url String: URL to the feed
2957          * @param $text String: value of the "title" attribute
2958          * @return String: HTML fragment
2959          */
2960         private function feedLink( $type, $url, $text ) {
2961                 return Html::element( 'link', array(
2962                         'rel' => 'alternate',
2963                         'type' => "application/$type+xml",
2964                         'title' => $text,
2965                         'href' => $url )
2966                 );
2967         }
2968
2969         /**
2970          * Add a local or specified stylesheet, with the given media options.
2971          * Meant primarily for internal use...
2972          *
2973          * @param $style String: URL to the file
2974          * @param $media String: to specify a media type, 'screen', 'printable', 'handheld' or any.
2975          * @param $condition String: for IE conditional comments, specifying an IE version
2976          * @param $dir String: set to 'rtl' or 'ltr' for direction-specific sheets
2977          */
2978         public function addStyle( $style, $media = '', $condition = '', $dir = '' ) {
2979                 $options = array();
2980                 // Even though we expect the media type to be lowercase, but here we
2981                 // force it to lowercase to be safe.
2982                 if( $media ) {
2983                         $options['media'] = $media;
2984                 }
2985                 if( $condition ) {
2986                         $options['condition'] = $condition;
2987                 }
2988                 if( $dir ) {
2989                         $options['dir'] = $dir;
2990                 }
2991                 $this->styles[$style] = $options;
2992         }
2993
2994         /**
2995          * Adds inline CSS styles
2996          * @param $style_css Mixed: inline CSS
2997          */
2998         public function addInlineStyle( $style_css ){
2999                 $this->mInlineStyles .= Html::inlineStyle( $style_css );
3000         }
3001
3002         /**
3003          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
3004          * These will be applied to various media & IE conditionals.
3005          * @param $sk Skin object
3006          */
3007         public function buildCssLinks( $sk ) {
3008                 $ret = '';
3009                 // Add ResourceLoader styles
3010                 // Split the styles into four groups
3011                 $styles = array( 'other' => array(), 'user' => array(), 'site' => array(), 'private' => array(), 'noscript' => array() );
3012                 $resourceLoader = $this->getResourceLoader();
3013                 foreach ( $this->getModuleStyles() as $name ) {
3014                         $group = $resourceLoader->getModule( $name )->getGroup();
3015                         // Modules in groups named "other" or anything different than "user", "site" or "private"
3016                         // will be placed in the "other" group
3017                         $styles[isset( $styles[$group] ) ? $group : 'other'][] = $name;
3018                 }
3019
3020                 // We want site, private and user styles to override dynamically added styles from modules, but we want
3021                 // dynamically added styles to override statically added styles from other modules. So the order
3022                 // has to be other, dynamic, site, private, user
3023                 // Add statically added styles for other modules
3024                 $ret .= $this->makeResourceLoaderLink( $sk, $styles['other'], ResourceLoaderModule::TYPE_STYLES );
3025                 // Add normal styles added through addStyle()/addInlineStyle() here
3026                 $ret .= implode( "\n", $this->buildCssLinksArray() ) . $this->mInlineStyles;
3027                 // Add marker tag to mark the place where the client-side loader should inject dynamic styles
3028                 // We use a <meta> tag with a made-up name for this because that's valid HTML
3029                 $ret .= Html::element( 'meta', array( 'name' => 'ResourceLoaderDynamicStyles', 'content' => '' ) ) . "\n";
3030
3031                 // Add site, private and user styles
3032                 // 'private' at present only contains user.options, so put that before 'user'
3033                 // Any future private modules will likely have a similar user-specific character
3034                 foreach ( array( 'site', 'noscript', 'private', 'user' ) as $group ) {
3035                         $ret .= $this->makeResourceLoaderLink( $sk, $styles[$group],
3036                                         ResourceLoaderModule::TYPE_STYLES
3037                         );
3038                 }
3039                 return $ret;
3040         }
3041
3042         public function buildCssLinksArray() {
3043                 $links = array();
3044                 foreach( $this->styles as $file => $options ) {
3045                         $link = $this->styleLink( $file, $options );
3046                         if( $link ) {
3047                                 $links[$file] = $link;
3048                         }
3049                 }
3050                 return $links;
3051         }
3052
3053         /**
3054          * Generate \<link\> tags for stylesheets
3055          *
3056          * @param $style String: URL to the file
3057          * @param $options Array: option, can contain 'condition', 'dir', 'media'
3058          *                 keys
3059          * @return String: HTML fragment
3060          */
3061         protected function styleLink( $style, $options ) {
3062                 if( isset( $options['dir'] ) ) {
3063                         $siteDir = wfUILang()->getDir();
3064                         if( $siteDir != $options['dir'] ) {
3065                                 return '';
3066                         }
3067                 }
3068
3069                 if( isset( $options['media'] ) ) {
3070                         $media = self::transformCssMedia( $options['media'] );
3071                         if( is_null( $media ) ) {
3072                                 return '';
3073                         }
3074                 } else {
3075                         $media = 'all';
3076                 }
3077
3078                 if( substr( $style, 0, 1 ) == '/' ||
3079                         substr( $style, 0, 5 ) == 'http:' ||
3080                         substr( $style, 0, 6 ) == 'https:' ) {
3081                         $url = $style;
3082                 } else {
3083                         global $wgStylePath, $wgStyleVersion;
3084                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
3085                 }
3086
3087                 $link = Html::linkedStyle( $url, $media );
3088
3089                 if( isset( $options['condition'] ) ) {
3090                         $condition = htmlspecialchars( $options['condition'] );
3091                         $link = "<!--[if $condition]>$link<![endif]-->";
3092                 }
3093                 return $link;
3094         }
3095
3096         /**
3097          * Transform "media" attribute based on request parameters
3098          *
3099          * @param $media String: current value of the "media" attribute
3100          * @return String: modified value of the "media" attribute
3101          */
3102         public static function transformCssMedia( $media ) {
3103                 global $wgRequest, $wgHandheldForIPhone;
3104
3105                 // Switch in on-screen display for media testing
3106                 $switches = array(
3107                         'printable' => 'print',
3108                         'handheld' => 'handheld',
3109                 );
3110                 foreach( $switches as $switch => $targetMedia ) {
3111                         if( $wgRequest->getBool( $switch ) ) {
3112                                 if( $media == $targetMedia ) {
3113                                         $media = '';
3114                                 } elseif( $media == 'screen' ) {
3115                                         return null;
3116                                 }
3117                         }
3118                 }
3119
3120                 // Expand longer media queries as iPhone doesn't grok 'handheld'
3121                 if( $wgHandheldForIPhone ) {
3122                         $mediaAliases = array(
3123                                 'screen' => 'screen and (min-device-width: 481px)',
3124                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
3125                         );
3126
3127                         if( isset( $mediaAliases[$media] ) ) {
3128                                 $media = $mediaAliases[$media];
3129                         }
3130                 }
3131
3132                 return $media;
3133         }
3134
3135         /**
3136          * Turn off regular page output and return an error reponse
3137          * for when rate limiting has triggered.
3138          */
3139         public function rateLimited() {
3140                 $this->setPageTitle( wfMsg( 'actionthrottled' ) );
3141                 $this->setRobotPolicy( 'noindex,follow' );
3142                 $this->setArticleRelated( false );
3143                 $this->enableClientCache( false );
3144                 $this->mRedirect = '';
3145                 $this->clearHTML();
3146                 $this->setStatusCode( 503 );
3147                 $this->addWikiMsg( 'actionthrottledtext' );
3148
3149                 $this->returnToMain( null, $this->getTitle() );
3150         }
3151
3152         /**
3153          * Show a warning about slave lag
3154          *
3155          * If the lag is higher than $wgSlaveLagCritical seconds,
3156          * then the warning is a bit more obvious. If the lag is
3157          * lower than $wgSlaveLagWarning, then no warning is shown.
3158          *
3159          * @param $lag Integer: slave lag
3160          */
3161         public function showLagWarning( $lag ) {
3162                 global $wgSlaveLagWarning, $wgSlaveLagCritical;
3163                 if( $lag >= $wgSlaveLagWarning ) {
3164                         $message = $lag < $wgSlaveLagCritical
3165                                 ? 'lag-warn-normal'
3166                                 : 'lag-warn-high';
3167                         $wrap = Html::rawElement( 'div', array( 'class' => "mw-{$message}" ), "\n$1\n" );
3168                         $this->wrapWikiMsg( "$wrap\n", array( $message, $this->getContext()->getLang()->formatNum( $lag ) ) );
3169                 }
3170         }
3171
3172         /**
3173          * Add a wikitext-formatted message to the output.
3174          * This is equivalent to:
3175          *
3176          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
3177          */
3178         public function addWikiMsg( /*...*/ ) {
3179                 $args = func_get_args();
3180                 $name = array_shift( $args );
3181                 $this->addWikiMsgArray( $name, $args );
3182         }
3183
3184         /**
3185          * Add a wikitext-formatted message to the output.
3186          * Like addWikiMsg() except the parameters are taken as an array
3187          * instead of a variable argument list.
3188          *
3189          * $options is passed through to wfMsgExt(), see that function for details.
3190          */
3191         public function addWikiMsgArray( $name, $args, $options = array() ) {
3192                 $options[] = 'parse';
3193                 $text = wfMsgExt( $name, $options, $args );
3194                 $this->addHTML( $text );
3195         }
3196
3197         /**
3198          * This function takes a number of message/argument specifications, wraps them in
3199          * some overall structure, and then parses the result and adds it to the output.
3200          *
3201          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
3202          * on. The subsequent arguments may either be strings, in which case they are the
3203          * message names, or arrays, in which case the first element is the message name,
3204          * and subsequent elements are the parameters to that message.
3205          *
3206          * The special named parameter 'options' in a message specification array is passed
3207          * through to the $options parameter of wfMsgExt().
3208          *
3209          * Don't use this for messages that are not in users interface language.
3210          *
3211          * For example:
3212          *
3213          *    $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>", 'some-error' );
3214          *
3215          * Is equivalent to:
3216          *
3217          *    $wgOut->addWikiText( "<div class='error'>\n" . wfMsgNoTrans( 'some-error' ) . "\n</div>" );
3218          *
3219          * The newline after opening div is needed in some wikitext. See bug 19226.
3220          */
3221         public function wrapWikiMsg( $wrap /*, ...*/ ) {
3222                 $msgSpecs = func_get_args();
3223                 array_shift( $msgSpecs );
3224                 $msgSpecs = array_values( $msgSpecs );
3225                 $s = $wrap;
3226                 foreach ( $msgSpecs as $n => $spec ) {
3227                         $options = array();
3228                         if ( is_array( $spec ) ) {
3229                                 $args = $spec;
3230                                 $name = array_shift( $args );
3231                                 if ( isset( $args['options'] ) ) {
3232                                         $options = $args['options'];
3233                                         unset( $args['options'] );
3234                                 }
3235                         }  else {
3236                                 $args = array();
3237                                 $name = $spec;
3238                         }
3239                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
3240                 }
3241                 $this->addWikiText( $s );
3242         }
3243
3244         /**
3245          * Include jQuery core. Use this to avoid loading it multiple times
3246          * before we get a usable script loader.
3247          *
3248          * @param $modules Array: list of jQuery modules which should be loaded
3249          * @return Array: the list of modules which were not loaded.
3250          * @since 1.16
3251          * @deprecated since 1.17
3252          */
3253         public function includeJQuery( $modules = array() ) {
3254                 return array();
3255         }
3256
3257 }