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  * @todo FIXME: Another class handles sending the whole page to the client.
  15  *
  16  * Some comments comes from a pairing session between Zak Greant and Antoine Musso
  17  * in November 2010.
  18  *
  19  * @todo document
  20  */
  21 class OutputPage extends ContextSource {
  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 = false;
  51
  52         /**
  53          * Should be private. Has get/set methods properly documented.
  54          * Stores "article flag" toggle.
  55          */
  56         var $mIsArticleRelated = true;
  57
  58         /**
  59          * Should be private. We have to set isPrintable(). Some pages should
  60          * never be printed (ex: redirections).
  61          */
  62         var $mPrintable = false;
  63
  64         /**
  65          * Should be private. We have set/get/append methods.
  66          *
  67          * Contains the page subtitle. Special pages usually have some links here.
  68          * Don't confuse with site subtitle added by skins.
  69          */
  70         private $mSubtitle = array();
  71
  72         var $mRedirect = '';
  73         var $mStatusCode;
  74
  75         /**
  76          * mLastModified and mEtag are used for sending cache control.
  77          * The whole caching system should probably be moved into its own class.
  78          */
  79         var $mLastModified = '';
  80
  81         /**
  82          * Should be private. No getter but used in sendCacheControl();
  83          * Contains an HTTP Entity Tags (see RFC 2616 section 3.13) which is used
  84          * as a unique identifier for the content. It is later used by the client
  85          * to compare its cached version with the server version. Client sends
  86          * headers If-Match and If-None-Match containing its locally cached ETAG value.
  87          *
  88          * To get more information, you will have to look at HTTP/1.1 protocol which
  89          * is properly described in RFC 2616 : http://tools.ietf.org/html/rfc2616
  90          */
  91         var $mETag = false;
  92
  93         var $mCategoryLinks = array();
  94         var $mCategories = array();
  95
  96         /// Should be private. Array of Interwiki Prefixed (non DB key) Titles (e.g. 'fr:Test page')
  97         var $mLanguageLinks = array();
  98
  99         /**
 100          * Should be private. Used for JavaScript (pre resource loader)
 101          * We should split js / css.
 102          * mScripts content is inserted as is in <head> by Skin. This might contains
 103          * either a link to a stylesheet or inline css.
 104          */
 105         var $mScripts = '';
 106
 107         /**
 108          * Inline CSS styles. Use addInlineStyle() sparsingly
 109          */
 110         var $mInlineStyles = '';
 111
 112         //
 113         var $mLinkColours;
 114
 115         /**
 116          * Used by skin template.
 117          * Example: $tpl->set( 'displaytitle', $out->mPageLinkTitle );
 118          */
 119         var $mPageLinkTitle = '';
 120
 121         /// Array of elements in <head>. Parser might add its own headers!
 122         var $mHeadItems = array();
 123
 124         // @todo FIXME: Next variables probably comes from the resource loader
 125         var $mModules = array(), $mModuleScripts = array(), $mModuleStyles = array(), $mModuleMessages = array();
 126         var $mResourceLoader;
 127         var $mJsConfigVars = array();
 128
 129         /** @todo FIXME: Is this still used ?*/
 130         var $mInlineMsg = array();
 131
 132         var $mTemplateIds = array();
 133         var $mImageTimeKeys = array();
 134
 135         var $mRedirectCode = '';
 136
 137         var $mFeedLinksAppendQuery = null;
 138
 139         # What level of 'untrustworthiness' is allowed in CSS/JS modules loaded on this page?
 140         # @see ResourceLoaderModule::$origin
 141         # ResourceLoaderModule::ORIGIN_ALL is assumed unless overridden;
 142         protected $mAllowedModules = array(
 143                 ResourceLoaderModule::TYPE_COMBINED => ResourceLoaderModule::ORIGIN_ALL,
 144         );
 145
 146         /**
 147          * @EasterEgg I just love the name for this self documenting variable.
 148          * @todo document
 149          */
 150         var $mDoNothing = false;
 151
 152         // Parser related.
 153         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
 154
 155         /**
 156          * lazy initialised, use parserOptions()
 157          * @var ParserOptions
 158          */
 159         protected $mParserOptions = null;
 160
 161         /**
 162          * Handles the atom / rss links.
 163          * We probably only support atom in 2011.
 164          * Looks like a private variable.
 165          * @see $wgAdvertisedFeedTypes
 166          */
 167         var $mFeedLinks = array();
 168
 169         // Gwicke work on squid caching? Roughly from 2003.
 170         var $mEnableClientCache = true;
 171
 172         /**
 173          * Flag if output should only contain the body of the article.
 174          * Should be private.
 175          */
 176         var $mArticleBodyOnly = false;
 177
 178         var $mNewSectionLink = false;
 179         var $mHideNewSectionLink = false;
 180
 181         /**
 182          * Comes from the parser. This was probably made to load CSS/JS only
 183          * if we had <gallery>. Used directly in CategoryPage.php
 184          * Looks like resource loader can replace this.
 185          */
 186         var $mNoGallery = false;
 187
 188         // should be private.
 189         var $mPageTitleActionText = '';
 190         var $mParseWarnings = array();
 191
 192         // Cache stuff. Looks like mEnableClientCache
 193         var $mSquidMaxage = 0;
 194
 195         // @todo document
 196         var $mPreventClickjacking = true;
 197
 198         /// should be private. To include the variable {{REVISIONID}}
 199         var $mRevisionId = null;
 200         private $mRevisionTimestamp = null;
 201
 202         var $mFileVersion = null;
 203
 204         /**
 205          * An array of stylesheet filenames (relative from skins path), with options
 206          * for CSS media, IE conditions, and RTL/LTR direction.
 207          * For internal use; add settings in the skin via $this->addStyle()
 208          *
 209          * Style again! This seems like a code duplication since we already have
 210          * mStyles. This is what makes OpenSource amazing.
 211          */
 212         var $styles = array();
 213
 214         /**
 215          * Whether jQuery is already handled.
 216          */
 217         protected $mJQueryDone = false;
 218
 219         private $mIndexPolicy = 'index';
 220         private $mFollowPolicy = 'follow';
 221         private $mVaryHeader = array(
 222                 'Accept-Encoding' => array( 'list-contains=gzip' ),
 223                 'Cookie' => null
 224         );
 225
 226         /**
 227          * If the current page was reached through a redirect, $mRedirectedFrom contains the Title
 228          * of the redirect.
 229          *
 230          * @var Title
 231          */
 232         private $mRedirectedFrom = null;
 233
 234         /**
 235          * Constructor for OutputPage. This should not be called directly.
 236          * Instead a new RequestContext should be created and it will implicitly create
 237          * a OutputPage tied to that context.
 238          */
 239         function __construct( IContextSource $context = null ) {
 240                 if ( $context === null ) {
 241                         # Extensions should use `new RequestContext` instead of `new OutputPage` now.
 242                         wfDeprecated( __METHOD__ );
 243                 } else {
 244                         $this->setContext( $context );
 245                 }
 246         }
 247
 248         /**
 249          * Redirect to $url rather than displaying the normal page
 250          *
 251          * @param $url String: URL
 252          * @param $responsecode String: HTTP status code
 253          */
 254         public function redirect( $url, $responsecode = '302' ) {
 255                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
 256                 $this->mRedirect = str_replace( "\n", '', $url );
 257                 $this->mRedirectCode = $responsecode;
 258         }
 259
 260         /**
 261          * Get the URL to redirect to, or an empty string if not redirect URL set
 262          *
 263          * @return String
 264          */
 265         public function getRedirect() {
 266                 return $this->mRedirect;
 267         }
 268
 269         /**
 270          * Set the HTTP status code to send with the output.
 271          *
 272          * @param $statusCode Integer
 273          */
 274         public function setStatusCode( $statusCode ) {
 275                 $this->mStatusCode = $statusCode;
 276         }
 277
 278         /**
 279          * Add a new <meta> tag
 280          * To add an http-equiv meta tag, precede the name with "http:"
 281          *
 282          * @param $name String tag name
 283          * @param $val String tag value
 284          */
 285         function addMeta( $name, $val ) {
 286                 array_push( $this->mMetatags, array( $name, $val ) );
 287         }
 288
 289         /**
 290          * Add a keyword or a list of keywords in the page header
 291          *
 292          * @param $text String or array of strings
 293          */
 294         function addKeyword( $text ) {
 295                 if( is_array( $text ) ) {
 296                         $this->mKeywords = array_merge( $this->mKeywords, $text );
 297                 } else {
 298                         array_push( $this->mKeywords, $text );
 299                 }
 300         }
 301
 302         /**
 303          * Add a new \<link\> tag to the page header
 304          *
 305          * @param $linkarr Array: associative array of attributes.
 306          */
 307         function addLink( $linkarr ) {
 308                 array_push( $this->mLinktags, $linkarr );
 309         }
 310
 311         /**
 312          * Add a new \<link\> with "rel" attribute set to "meta"
 313          *
 314          * @param $linkarr Array: associative array mapping attribute names to their
 315          *                 values, both keys and values will be escaped, and the
 316          *                 "rel" attribute will be automatically added
 317          */
 318         function addMetadataLink( $linkarr ) {
 319                 $linkarr['rel'] = $this->getMetadataAttribute();
 320                 $this->addLink( $linkarr );
 321         }
 322
 323         /**
 324          * Get the value of the "rel" attribute for metadata links
 325          *
 326          * @return String
 327          */
 328         public function getMetadataAttribute() {
 329                 # note: buggy CC software only reads first "meta" link
 330                 static $haveMeta = false;
 331                 if ( $haveMeta ) {
 332                         return 'alternate meta';
 333                 } else {
 334                         $haveMeta = true;
 335                         return 'meta';
 336                 }
 337         }
 338
 339         /**
 340          * Add raw HTML to the list of scripts (including \<script\> tag, etc.)
 341          *
 342          * @param $script String: raw HTML
 343          */
 344         function addScript( $script ) {
 345                 $this->mScripts .= $script . "\n";
 346         }
 347
 348         /**
 349          * Register and add a stylesheet from an extension directory.
 350          *
 351          * @param $url String path to sheet.  Provide either a full url (beginning
 352          *             with 'http', etc) or a relative path from the document root
 353          *             (beginning with '/').  Otherwise it behaves identically to
 354          *             addStyle() and draws from the /skins folder.
 355          */
 356         public function addExtensionStyle( $url ) {
 357                 array_push( $this->mExtStyles, $url );
 358         }
 359
 360         /**
 361          * Get all styles added by extensions
 362          *
 363          * @return Array
 364          */
 365         function getExtStyle() {
 366                 return $this->mExtStyles;
 367         }
 368
 369         /**
 370          * Add a JavaScript file out of skins/common, or a given relative path.
 371          *
 372          * @param $file String: filename in skins/common or complete on-server path
 373          *              (/foo/bar.js)
 374          * @param $version String: style version of the file. Defaults to $wgStyleVersion
 375          */
 376         public function addScriptFile( $file, $version = null ) {
 377                 global $wgStylePath, $wgStyleVersion;
 378                 // See if $file parameter is an absolute URL or begins with a slash
 379                 if( substr( $file, 0, 1 ) == '/' || preg_match( '#^[a-z]*://#i', $file ) ) {
 380                         $path = $file;
 381                 } else {
 382                         $path = "{$wgStylePath}/common/{$file}";
 383                 }
 384                 if ( is_null( $version ) )
 385                         $version = $wgStyleVersion;
 386                 $this->addScript( Html::linkedScript( wfAppendQuery( $path, $version ) ) );
 387         }
 388
 389         /**
 390          * Add a self-contained script tag with the given contents
 391          *
 392          * @param $script String: JavaScript text, no <script> tags
 393          */
 394         public function addInlineScript( $script ) {
 395                 $this->mScripts .= Html::inlineScript( "\n$script\n" ) . "\n";
 396         }
 397
 398         /**
 399          * Get all registered JS and CSS tags for the header.
 400          *
 401          * @return String
 402          */
 403         function getScript() {
 404                 return $this->mScripts . $this->getHeadItems();
 405         }
 406
 407         /**
 408          * Filter an array of modules to remove insufficiently trustworthy members, and modules
 409          * which are no longer registered (eg a page is cached before an extension is disabled)
 410          * @param $modules Array
 411          * @param $position String if not null, only return modules with this position
 412          * @param $type string
 413          * @return Array
 414          */
 415         protected function filterModules( $modules, $position = null, $type = ResourceLoaderModule::TYPE_COMBINED ){
 416                 $resourceLoader = $this->getResourceLoader();
 417                 $filteredModules = array();
 418                 foreach( $modules as $val ){
 419                         $module = $resourceLoader->getModule( $val );
 420                         if( $module instanceof ResourceLoaderModule
 421                                 && $module->getOrigin() <= $this->getAllowedModules( $type )
 422                                 && ( is_null( $position ) || $module->getPosition() == $position ) )
 423                         {
 424                                 $filteredModules[] = $val;
 425                         }
 426                 }
 427                 return $filteredModules;
 428         }
 429
 430         /**
 431          * Get the list of modules to include on this page
 432          *
 433          * @param $filter Bool whether to filter out insufficiently trustworthy modules
 434          * @param $position String if not null, only return modules with this position
 435          * @param $param string
 436          * @return Array of module names
 437          */
 438         public function getModules( $filter = false, $position = null, $param = 'mModules' ) {
 439                 $modules = array_values( array_unique( $this->$param ) );
 440                 return $filter
 441                         ? $this->filterModules( $modules, $position )
 442                         : $modules;
 443         }
 444
 445         /**
 446          * Add one or more modules recognized by the resource loader. Modules added
 447          * through this function will be loaded by the resource loader when the
 448          * page loads.
 449          *
 450          * @param $modules Mixed: module name (string) or array of module names
 451          */
 452         public function addModules( $modules ) {
 453                 $this->mModules = array_merge( $this->mModules, (array)$modules );
 454         }
 455
 456         /**
 457          * Get the list of module JS to include on this page
 458          *
 459          * @param $filter
 460          * @param $position
 461          *
 462          * @return array of module names
 463          */
 464         public function getModuleScripts( $filter = false, $position = null ) {
 465                 return $this->getModules( $filter, $position, 'mModuleScripts' );
 466         }
 467
 468         /**
 469          * Add only JS of one or more modules recognized by the resource loader. Module
 470          * scripts added through this function will be loaded by the resource loader when
 471          * the page loads.
 472          *
 473          * @param $modules Mixed: module name (string) or array of module names
 474          */
 475         public function addModuleScripts( $modules ) {
 476                 $this->mModuleScripts = array_merge( $this->mModuleScripts, (array)$modules );
 477         }
 478
 479         /**
 480          * Get the list of module CSS to include on this page
 481          *
 482          * @param $filter
 483          * @param $position
 484          *
 485          * @return Array of module names
 486          */
 487         public function getModuleStyles( $filter = false, $position = null ) {
 488                 return $this->getModules( $filter,  $position, 'mModuleStyles' );
 489         }
 490
 491         /**
 492          * Add only CSS of one or more modules recognized by the resource loader. Module
 493          * styles added through this function will be loaded by the resource loader when
 494          * the page loads.
 495          *
 496          * @param $modules Mixed: module name (string) or array of module names
 497          */
 498         public function addModuleStyles( $modules ) {
 499                 $this->mModuleStyles = array_merge( $this->mModuleStyles, (array)$modules );
 500         }
 501
 502         /**
 503          * Get the list of module messages to include on this page
 504          *
 505          * @param $filter
 506          * @param $position
 507          *
 508          * @return Array of module names
 509          */
 510         public function getModuleMessages( $filter = false, $position = null ) {
 511                 return $this->getModules( $filter, $position, 'mModuleMessages' );
 512         }
 513
 514         /**
 515          * Add only messages of one or more modules recognized by the resource loader.
 516          * Module messages added through this function will be loaded by the resource
 517          * loader when the page loads.
 518          *
 519          * @param $modules Mixed: module name (string) or array of module names
 520          */
 521         public function addModuleMessages( $modules ) {
 522                 $this->mModuleMessages = array_merge( $this->mModuleMessages, (array)$modules );
 523         }
 524
 525         /**
 526          * Get an array of head items
 527          *
 528          * @return Array
 529          */
 530         function getHeadItemsArray() {
 531                 return $this->mHeadItems;
 532         }
 533
 534         /**
 535          * Get all header items in a string
 536          *
 537          * @return String
 538          */
 539         function getHeadItems() {
 540                 $s = '';
 541                 foreach ( $this->mHeadItems as $item ) {
 542                         $s .= $item;
 543                 }
 544                 return $s;
 545         }
 546
 547         /**
 548          * Add or replace an header item to the output
 549          *
 550          * @param $name String: item name
 551          * @param $value String: raw HTML
 552          */
 553         public function addHeadItem( $name, $value ) {
 554                 $this->mHeadItems[$name] = $value;
 555         }
 556
 557         /**
 558          * Check if the header item $name is already set
 559          *
 560          * @param $name String: item name
 561          * @return Boolean
 562          */
 563         public function hasHeadItem( $name ) {
 564                 return isset( $this->mHeadItems[$name] );
 565         }
 566
 567         /**
 568          * Set the value of the ETag HTTP header, only used if $wgUseETag is true
 569          *
 570          * @param $tag String: value of "ETag" header
 571          */
 572         function setETag( $tag ) {
 573                 $this->mETag = $tag;
 574         }
 575
 576         /**
 577          * Set whether the output should only contain the body of the article,
 578          * without any skin, sidebar, etc.
 579          * Used e.g. when calling with "action=render".
 580          *
 581          * @param $only Boolean: whether to output only the body of the article
 582          */
 583         public function setArticleBodyOnly( $only ) {
 584                 $this->mArticleBodyOnly = $only;
 585         }
 586
 587         /**
 588          * Return whether the output will contain only the body of the article
 589          *
 590          * @return Boolean
 591          */
 592         public function getArticleBodyOnly() {
 593                 return $this->mArticleBodyOnly;
 594         }
 595
 596         /**
 597          * checkLastModified tells the client to use the client-cached page if
 598          * possible. If sucessful, the OutputPage is disabled so that
 599          * any future call to OutputPage->output() have no effect.
 600          *
 601          * Side effect: sets mLastModified for Last-Modified header
 602          *
 603          * @param $timestamp string
 604          *
 605          * @return Boolean: true iff cache-ok headers was sent.
 606          */
 607         public function checkLastModified( $timestamp ) {
 608                 global $wgCachePages, $wgCacheEpoch;
 609
 610                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 611                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 612                         return false;
 613                 }
 614                 if( !$wgCachePages ) {
 615                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 616                         return false;
 617                 }
 618                 if( $this->getUser()->getOption( 'nocache' ) ) {
 619                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 620                         return false;
 621                 }
 622
 623                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 624                 $modifiedTimes = array(
 625                         'page' => $timestamp,
 626                         'user' => $this->getUser()->getTouched(),
 627                         'epoch' => $wgCacheEpoch
 628                 );
 629                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 630
 631                 $maxModified = max( $modifiedTimes );
 632                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 633
 634                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 635                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 636                         return false;
 637                 }
 638
 639                 # Make debug info
 640                 $info = '';
 641                 foreach ( $modifiedTimes as $name => $value ) {
 642                         if ( $info !== '' ) {
 643                                 $info .= ', ';
 644                         }
 645                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 646                 }
 647
 648                 # IE sends sizes after the date like this:
 649                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 650                 # this breaks strtotime().
 651                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 652
 653                 wfSuppressWarnings(); // E_STRICT system time bitching
 654                 $clientHeaderTime = strtotime( $clientHeader );
 655                 wfRestoreWarnings();
 656                 if ( !$clientHeaderTime ) {
 657                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 658                         return false;
 659                 }
 660                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 661
 662                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 663                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 664                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 665                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 666                 if( $clientHeaderTime < $maxModified ) {
 667                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 668                         return false;
 669                 }
 670
 671                 # Not modified
 672                 # Give a 304 response code and disable body output
 673                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 674                 ini_set( 'zlib.output_compression', 0 );
 675                 $this->getRequest()->response()->header( "HTTP/1.1 304 Not Modified" );
 676                 $this->sendCacheControl();
 677                 $this->disable();
 678
 679                 // Don't output a compressed blob when using ob_gzhandler;
 680                 // it's technically against HTTP spec and seems to confuse
 681                 // Firefox when the response gets split over two packets.
 682                 wfClearOutputBuffers();
 683
 684                 return true;
 685         }
 686
 687         /**
 688          * Override the last modified timestamp
 689          *
 690          * @param $timestamp String: new timestamp, in a format readable by
 691          *        wfTimestamp()
 692          */
 693         public function setLastModified( $timestamp ) {
 694                 $this->mLastModified = wfTimestamp( TS_RFC2822, $timestamp );
 695         }
 696
 697         /**
 698          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 699          *
 700          * @param $policy String: the literal string to output as the contents of
 701          *   the meta tag.  Will be parsed according to the spec and output in
 702          *   standardized form.
 703          * @return null
 704          */
 705         public function setRobotPolicy( $policy ) {
 706                 $policy = Article::formatRobotPolicy( $policy );
 707
 708                 if( isset( $policy['index'] ) ) {
 709                         $this->setIndexPolicy( $policy['index'] );
 710                 }
 711                 if( isset( $policy['follow'] ) ) {
 712                         $this->setFollowPolicy( $policy['follow'] );
 713                 }
 714         }
 715
 716         /**
 717          * Set the index policy for the page, but leave the follow policy un-
 718          * touched.
 719          *
 720          * @param $policy string Either 'index' or 'noindex'.
 721          * @return null
 722          */
 723         public function setIndexPolicy( $policy ) {
 724                 $policy = trim( $policy );
 725                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 726                         $this->mIndexPolicy = $policy;
 727                 }
 728         }
 729
 730         /**
 731          * Set the follow policy for the page, but leave the index policy un-
 732          * touched.
 733          *
 734          * @param $policy String: either 'follow' or 'nofollow'.
 735          * @return null
 736          */
 737         public function setFollowPolicy( $policy ) {
 738                 $policy = trim( $policy );
 739                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 740                         $this->mFollowPolicy = $policy;
 741                 }
 742         }
 743
 744         /**
 745          * Set the new value of the "action text", this will be added to the
 746          * "HTML title", separated from it with " - ".
 747          *
 748          * @param $text String: new value of the "action text"
 749          */
 750         public function setPageTitleActionText( $text ) {
 751                 $this->mPageTitleActionText = $text;
 752         }
 753
 754         /**
 755          * Get the value of the "action text"
 756          *
 757          * @return String
 758          */
 759         public function getPageTitleActionText() {
 760                 if ( isset( $this->mPageTitleActionText ) ) {
 761                         return $this->mPageTitleActionText;
 762                 }
 763         }
 764
 765         /**
 766          * "HTML title" means the contents of <title>.
 767          * It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 768          *
 769          * @param $name string
 770          */
 771         public function setHTMLTitle( $name ) {
 772                 if ( $name instanceof Message ) {
 773                         $this->mHTMLtitle = $name->setContext( $this->getContext() )->text();
 774                 } else {
 775                         $this->mHTMLtitle = $name;
 776                 }
 777         }
 778
 779         /**
 780          * Return the "HTML title", i.e. the content of the <title> tag.
 781          *
 782          * @return String
 783          */
 784         public function getHTMLTitle() {
 785                 return $this->mHTMLtitle;
 786         }
 787
 788         /**
 789          * Set $mRedirectedFrom, the Title of the page which redirected us to the current page.
 790          *
 791          * param @t Title
 792          */
 793         public function setRedirectedFrom( $t ) {
 794                 $this->mRedirectedFrom = $t;
 795         }
 796
 797         /**
 798          * "Page title" means the contents of \<h1\>. It is stored as a valid HTML fragment.
 799          * This function allows good tags like \<sup\> in the \<h1\> tag, but not bad tags like \<script\>.
 800          * This function automatically sets \<title\> to the same content as \<h1\> but with all tags removed.
 801          * Bad tags that were escaped in \<h1\> will still be escaped in \<title\>, and good tags like \<i\> will be dropped entirely.
 802          *
 803          * @param $name string|Message
 804          */
 805         public function setPageTitle( $name ) {
 806                 if ( $name instanceof Message ) {
 807                         $name = $name->setContext( $this->getContext() )->text();
 808                 }
 809
 810                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 811                 # but leave "<i>foobar</i>" alone
 812                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 813                 $this->mPagetitle = $nameWithTags;
 814
 815                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 816                 $this->setHTMLTitle( $this->msg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 817         }
 818
 819         /**
 820          * Return the "page title", i.e. the content of the \<h1\> tag.
 821          *
 822          * @return String
 823          */
 824         public function getPageTitle() {
 825                 return $this->mPagetitle;
 826         }
 827
 828         /**
 829          * Set the Title object to use
 830          *
 831          * @param $t Title object
 832          */
 833         public function setTitle( Title $t ) {
 834                 $this->getContext()->setTitle( $t );
 835         }
 836
 837
 838         /**
 839          * Replace the subtile with $str
 840          *
 841          * @param $str String|Message: new value of the subtitle
 842          */
 843         public function setSubtitle( $str ) {
 844                 $this->clearSubtitle();
 845                 $this->addSubtitle( $str );
 846         }
 847
 848         /**
 849          * Add $str to the subtitle
 850          *
 851          * @deprecated in 1.19; use addSubtitle() instead
 852          * @param $str String|Message to add to the subtitle
 853          */
 854         public function appendSubtitle( $str ) {
 855                 $this->addSubtitle( $str );
 856         }
 857
 858         /**
 859          * Add $str to the subtitle
 860          *
 861          * @param $str String|Message to add to the subtitle
 862          */
 863         public function addSubtitle( $str ) {
 864                 if ( $str instanceof Message ) {
 865                         $this->mSubtitle[] = $str->setContext( $this->getContext() )->parse();
 866                 } else {
 867                         $this->mSubtitle[] = $str;
 868                 }
 869         }
 870
 871         /**
 872          * Add a subtitle containing a backlink to a page
 873          *
 874          * @param $title Title to link to
 875          */
 876         public function addBacklinkSubtitle( Title $title ) {
 877                 $query = array();
 878                 if ( $title->isRedirect() ) {
 879                         $query['redirect'] = 'no';
 880                 }
 881                 $this->addSubtitle( $this->msg( 'backlinksubtitle' )->rawParams( Linker::link( $title, null, array(), $query ) ) );
 882         }
 883
 884         /**
 885          * Clear the subtitles
 886          */
 887         public function clearSubtitle() {
 888                 $this->mSubtitle = array();
 889         }
 890
 891         /**
 892          * Get the subtitle
 893          *
 894          * @return String
 895          */
 896         public function getSubtitle() {
 897                 return implode( "<br />\n\t\t\t\t", $this->mSubtitle );
 898         }
 899
 900         /**
 901          * Set the page as printable, i.e. it'll be displayed with with all
 902          * print styles included
 903          */
 904         public function setPrintable() {
 905                 $this->mPrintable = true;
 906         }
 907
 908         /**
 909          * Return whether the page is "printable"
 910          *
 911          * @return Boolean
 912          */
 913         public function isPrintable() {
 914                 return $this->mPrintable;
 915         }
 916
 917         /**
 918          * Disable output completely, i.e. calling output() will have no effect
 919          */
 920         public function disable() {
 921                 $this->mDoNothing = true;
 922         }
 923
 924         /**
 925          * Return whether the output will be completely disabled
 926          *
 927          * @return Boolean
 928          */
 929         public function isDisabled() {
 930                 return $this->mDoNothing;
 931         }
 932
 933         /**
 934          * Show an "add new section" link?
 935          *
 936          * @return Boolean
 937          */
 938         public function showNewSectionLink() {
 939                 return $this->mNewSectionLink;
 940         }
 941
 942         /**
 943          * Forcibly hide the new section link?
 944          *
 945          * @return Boolean
 946          */
 947         public function forceHideNewSectionLink() {
 948                 return $this->mHideNewSectionLink;
 949         }
 950
 951         /**
 952          * Add or remove feed links in the page header
 953          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 954          * for the new version
 955          * @see addFeedLink()
 956          *
 957          * @param $show Boolean: true: add default feeds, false: remove all feeds
 958          */
 959         public function setSyndicated( $show = true ) {
 960                 if ( $show ) {
 961                         $this->setFeedAppendQuery( false );
 962                 } else {
 963                         $this->mFeedLinks = array();
 964                 }
 965         }
 966
 967         /**
 968          * Add default feeds to the page header
 969          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 970          * for the new version
 971          * @see addFeedLink()
 972          *
 973          * @param $val String: query to append to feed links or false to output
 974          *        default links
 975          */
 976         public function setFeedAppendQuery( $val ) {
 977                 global $wgAdvertisedFeedTypes;
 978
 979                 $this->mFeedLinks = array();
 980
 981                 foreach ( $wgAdvertisedFeedTypes as $type ) {
 982                         $query = "feed=$type";
 983                         if ( is_string( $val ) ) {
 984                                 $query .= '&' . $val;
 985                         }
 986                         $this->mFeedLinks[$type] = $this->getTitle()->getLocalURL( $query );
 987                 }
 988         }
 989
 990         /**
 991          * Add a feed link to the page header
 992          *
 993          * @param $format String: feed type, should be a key of $wgFeedClasses
 994          * @param $href String: URL
 995          */
 996         public function addFeedLink( $format, $href ) {
 997                 global $wgAdvertisedFeedTypes;
 998
 999                 if ( in_array( $format, $wgAdvertisedFeedTypes ) ) {
1000                         $this->mFeedLinks[$format] = $href;
1001                 }
1002         }
1003
1004         /**
1005          * Should we output feed links for this page?
1006          * @return Boolean
1007          */
1008         public function isSyndicated() {
1009                 return count( $this->mFeedLinks ) > 0;
1010         }
1011
1012         /**
1013          * Return URLs for each supported syndication format for this page.
1014          * @return array associating format keys with URLs
1015          */
1016         public function getSyndicationLinks() {
1017                 return $this->mFeedLinks;
1018         }
1019
1020         /**
1021          * Will currently always return null
1022          *
1023          * @return null
1024          */
1025         public function getFeedAppendQuery() {
1026                 return $this->mFeedLinksAppendQuery;
1027         }
1028
1029         /**
1030          * Set whether the displayed content is related to the source of the
1031          * corresponding article on the wiki
1032          * Setting true will cause the change "article related" toggle to true
1033          *
1034          * @param $v Boolean
1035          */
1036         public function setArticleFlag( $v ) {
1037                 $this->mIsarticle = $v;
1038                 if ( $v ) {
1039                         $this->mIsArticleRelated = $v;
1040                 }
1041         }
1042
1043         /**
1044          * Return whether the content displayed page is related to the source of
1045          * the corresponding article on the wiki
1046          *
1047          * @return Boolean
1048          */
1049         public function isArticle() {
1050                 return $this->mIsarticle;
1051         }
1052
1053         /**
1054          * Set whether this page is related an article on the wiki
1055          * Setting false will cause the change of "article flag" toggle to false
1056          *
1057          * @param $v Boolean
1058          */
1059         public function setArticleRelated( $v ) {
1060                 $this->mIsArticleRelated = $v;
1061                 if ( !$v ) {
1062                         $this->mIsarticle = false;
1063                 }
1064         }
1065
1066         /**
1067          * Return whether this page is related an article on the wiki
1068          *
1069          * @return Boolean
1070          */
1071         public function isArticleRelated() {
1072                 return $this->mIsArticleRelated;
1073         }
1074
1075         /**
1076          * Add new language links
1077          *
1078          * @param $newLinkArray Associative array mapping language code to the page
1079          *                      name
1080          */
1081         public function addLanguageLinks( $newLinkArray ) {
1082                 $this->mLanguageLinks += $newLinkArray;
1083         }
1084
1085         /**
1086          * Reset the language links and add new language links
1087          *
1088          * @param $newLinkArray Associative array mapping language code to the page
1089          *                      name
1090          */
1091         public function setLanguageLinks( $newLinkArray ) {
1092                 $this->mLanguageLinks = $newLinkArray;
1093         }
1094
1095         /**
1096          * Get the list of language links
1097          *
1098          * @return Array of Interwiki Prefixed (non DB key) Titles (e.g. 'fr:Test page')
1099          */
1100         public function getLanguageLinks() {
1101                 return $this->mLanguageLinks;
1102         }
1103
1104         /**
1105          * Add an array of categories, with names in the keys
1106          *
1107          * @param $categories Array mapping category name => sort key
1108          */
1109         public function addCategoryLinks( $categories ) {
1110                 global $wgContLang;
1111
1112                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
1113                         return;
1114                 }
1115
1116                 # Add the links to a LinkBatch
1117                 $arr = array( NS_CATEGORY => $categories );
1118                 $lb = new LinkBatch;
1119                 $lb->setArray( $arr );
1120
1121                 # Fetch existence plus the hiddencat property
1122                 $dbr = wfGetDB( DB_SLAVE );
1123                 $res = $dbr->select( array( 'page', 'page_props' ),
1124                         array( 'page_id', 'page_namespace', 'page_title', 'page_len', 'page_is_redirect', 'page_latest', 'pp_value' ),
1125                         $lb->constructSet( 'page', $dbr ),
1126                         __METHOD__,
1127                         array(),
1128                         array( 'page_props' => array( 'LEFT JOIN', array( 'pp_propname' => 'hiddencat', 'pp_page = page_id' ) ) )
1129                 );
1130
1131                 # Add the results to the link cache
1132                 $lb->addResultToCache( LinkCache::singleton(), $res );
1133
1134                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
1135                 $categories = array_combine(
1136                         array_keys( $categories ),
1137                         array_fill( 0, count( $categories ), 'normal' )
1138                 );
1139
1140                 # Mark hidden categories
1141                 foreach ( $res as $row ) {
1142                         if ( isset( $row->pp_value ) ) {
1143                                 $categories[$row->page_title] = 'hidden';
1144                         }
1145                 }
1146
1147                 # Add the remaining categories to the skin
1148                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
1149                         foreach ( $categories as $category => $type ) {
1150                                 $origcategory = $category;
1151                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
1152                                 $wgContLang->findVariantLink( $category, $title, true );
1153                                 if ( $category != $origcategory ) {
1154                                         if ( array_key_exists( $category, $categories ) ) {
1155                                                 continue;
1156                                         }
1157                                 }
1158                                 $text = $wgContLang->convertHtml( $title->getText() );
1159                                 $this->mCategories[] = $title->getText();
1160                                 $this->mCategoryLinks[$type][] = Linker::link( $title, $text );
1161                         }
1162                 }
1163         }
1164
1165         /**
1166          * Reset the category links (but not the category list) and add $categories
1167          *
1168          * @param $categories Array mapping category name => sort key
1169          */
1170         public function setCategoryLinks( $categories ) {
1171                 $this->mCategoryLinks = array();
1172                 $this->addCategoryLinks( $categories );
1173         }
1174
1175         /**
1176          * Get the list of category links, in a 2-D array with the following format:
1177          * $arr[$type][] = $link, where $type is either "normal" or "hidden" (for
1178          * hidden categories) and $link a HTML fragment with a link to the category
1179          * page
1180          *
1181          * @return Array
1182          */
1183         public function getCategoryLinks() {
1184                 return $this->mCategoryLinks;
1185         }
1186
1187         /**
1188          * Get the list of category names this page belongs to
1189          *
1190          * @return Array of strings
1191          */
1192         public function getCategories() {
1193                 return $this->mCategories;
1194         }
1195
1196         /**
1197          * Do not allow scripts which can be modified by wiki users to load on this page;
1198          * only allow scripts bundled with, or generated by, the software.
1199          */
1200         public function disallowUserJs() {
1201                 $this->reduceAllowedModules(
1202                         ResourceLoaderModule::TYPE_SCRIPTS,
1203                         ResourceLoaderModule::ORIGIN_CORE_INDIVIDUAL
1204                 );
1205         }
1206
1207         /**
1208          * Return whether user JavaScript is allowed for this page
1209          * @deprecated since 1.18 Load modules with ResourceLoader, and origin and
1210          *     trustworthiness is identified and enforced automagically.
1211          *     Will be removed in 1.20.
1212          * @return Boolean
1213          */
1214         public function isUserJsAllowed() {
1215                 wfDeprecated( __METHOD__, '1.18' );
1216                 return $this->getAllowedModules( ResourceLoaderModule::TYPE_SCRIPTS ) >= ResourceLoaderModule::ORIGIN_USER_INDIVIDUAL;
1217         }
1218
1219         /**
1220          * Show what level of JavaScript / CSS untrustworthiness is allowed on this page
1221          * @see ResourceLoaderModule::$origin
1222          * @param $type String ResourceLoaderModule TYPE_ constant
1223          * @return Int ResourceLoaderModule ORIGIN_ class constant
1224          */
1225         public function getAllowedModules( $type ){
1226                 if( $type == ResourceLoaderModule::TYPE_COMBINED ){
1227                         return min( array_values( $this->mAllowedModules ) );
1228                 } else {
1229                         return isset( $this->mAllowedModules[$type] )
1230                                 ? $this->mAllowedModules[$type]
1231                                 : ResourceLoaderModule::ORIGIN_ALL;
1232                 }
1233         }
1234
1235         /**
1236          * Set the highest level of CSS/JS untrustworthiness allowed
1237          * @param  $type String ResourceLoaderModule TYPE_ constant
1238          * @param  $level Int ResourceLoaderModule class constant
1239          */
1240         public function setAllowedModules( $type, $level ){
1241                 $this->mAllowedModules[$type] = $level;
1242         }
1243
1244         /**
1245          * As for setAllowedModules(), but don't inadvertantly make the page more accessible
1246          * @param  $type String
1247          * @param  $level Int ResourceLoaderModule class constant
1248          */
1249         public function reduceAllowedModules( $type, $level ){
1250                 $this->mAllowedModules[$type] = min( $this->getAllowedModules($type), $level );
1251         }
1252
1253         /**
1254          * Prepend $text to the body HTML
1255          *
1256          * @param $text String: HTML
1257          */
1258         public function prependHTML( $text ) {
1259                 $this->mBodytext = $text . $this->mBodytext;
1260         }
1261
1262         /**
1263          * Append $text to the body HTML
1264          *
1265          * @param $text String: HTML
1266          */
1267         public function addHTML( $text ) {
1268                 $this->mBodytext .= $text;
1269         }
1270
1271         /**
1272          * Shortcut for adding an Html::element via addHTML.
1273          *
1274          * @since 1.19
1275          *
1276          * @param $element string
1277          * @param $attribs array
1278          * @param $contents string
1279          */
1280         public function addElement( $element, $attribs = array(), $contents = '' ) {
1281                 $this->addHTML( Html::element( $element, $attribs, $contents ) );
1282         }
1283
1284         /**
1285          * Clear the body HTML
1286          */
1287         public function clearHTML() {
1288                 $this->mBodytext = '';
1289         }
1290
1291         /**
1292          * Get the body HTML
1293          *
1294          * @return String: HTML
1295          */
1296         public function getHTML() {
1297                 return $this->mBodytext;
1298         }
1299
1300         /**
1301          * Add $text to the debug output
1302          *
1303          * @param $text String: debug text
1304          */
1305         public function debug( $text ) {
1306                 $this->mDebugtext .= $text;
1307         }
1308
1309         /**
1310          * Get/set the ParserOptions object to use for wikitext parsing
1311          *
1312          * @param $options either the ParserOption to use or null to only get the
1313          *                 current ParserOption object
1314          * @return ParserOptions object
1315          */
1316         public function parserOptions( $options = null ) {
1317                 if ( !$this->mParserOptions ) {
1318                         $this->mParserOptions = ParserOptions::newFromContext( $this->getContext() );
1319                         $this->mParserOptions->setEditSection( false );
1320                 }
1321                 return wfSetVar( $this->mParserOptions, $options );
1322         }
1323
1324         /**
1325          * Set the revision ID which will be seen by the wiki text parser
1326          * for things such as embedded {{REVISIONID}} variable use.
1327          *
1328          * @param $revid Mixed: an positive integer, or null
1329          * @return Mixed: previous value
1330          */
1331         public function setRevisionId( $revid ) {
1332                 $val = is_null( $revid ) ? null : intval( $revid );
1333                 return wfSetVar( $this->mRevisionId, $val );
1334         }
1335
1336         /**
1337          * Get the displayed revision ID
1338          *
1339          * @return Integer
1340          */
1341         public function getRevisionId() {
1342                 return $this->mRevisionId;
1343         }
1344
1345         /**
1346          * Set the timestamp of the revision which will be displayed. This is used
1347          * to avoid a extra DB call in Skin::lastModified().
1348          *
1349          * @param $revid Mixed: string, or null
1350          * @return Mixed: previous value
1351          */
1352         public function setRevisionTimestamp( $timestmap ) {
1353                 return wfSetVar( $this->mRevisionTimestamp, $timestmap );
1354         }
1355
1356         /**
1357          * Get the timestamp of displayed revision.
1358          * This will be null if not filled by setRevisionTimestamp().
1359          *
1360          * @return String or null
1361          */
1362         public function getRevisionTimestamp() {
1363                 return $this->mRevisionTimestamp;
1364         }
1365
1366         /**
1367          * Set the displayed file version
1368          *
1369          * @param $file File|false
1370          * @return Mixed: previous value
1371          */
1372         public function setFileVersion( $file ) {
1373                 $val = null;
1374                 if ( $file instanceof File && $file->exists() ) {
1375                         $val = array( 'time' => $file->getTimestamp(), 'sha1' => $file->getSha1() );
1376                 }
1377                 return wfSetVar( $this->mFileVersion, $val, true );
1378         }
1379
1380         /**
1381          * Get the displayed file version
1382          *
1383          * @return Array|null ('time' => MW timestamp, 'sha1' => sha1)
1384          */
1385         public function getFileVersion() {
1386                 return $this->mFileVersion;
1387         }
1388
1389         /**
1390          * Get the templates used on this page
1391          *
1392          * @return Array (namespace => dbKey => revId)
1393          * @since 1.18
1394          */
1395         public function getTemplateIds() {
1396                 return $this->mTemplateIds;
1397         }
1398
1399         /**
1400          * Get the files used on this page
1401          *
1402          * @return Array (dbKey => array('time' => MW timestamp or null, 'sha1' => sha1 or ''))
1403          * @since 1.18
1404          */
1405         public function getFileSearchOptions() {
1406                 return $this->mImageTimeKeys;
1407         }
1408
1409         /**
1410          * Convert wikitext to HTML and add it to the buffer
1411          * Default assumes that the current page title will be used.
1412          *
1413          * @param $text String
1414          * @param $linestart Boolean: is this the start of a line?
1415          * @param $interface Boolean: is this text in the user interface language?
1416          */
1417         public function addWikiText( $text, $linestart = true, $interface = true ) {
1418                 $title = $this->getTitle(); // Work arround E_STRICT
1419                 $this->addWikiTextTitle( $text, $title, $linestart, /*tidy*/false, $interface );
1420         }
1421
1422         /**
1423          * Add wikitext with a custom Title object
1424          *
1425          * @param $text String: wikitext
1426          * @param $title Title object
1427          * @param $linestart Boolean: is this the start of a line?
1428          */
1429         public function addWikiTextWithTitle( $text, &$title, $linestart = true ) {
1430                 $this->addWikiTextTitle( $text, $title, $linestart );
1431         }
1432
1433         /**
1434          * Add wikitext with a custom Title object and tidy enabled.
1435          *
1436          * @param $text String: wikitext
1437          * @param $title Title object
1438          * @param $linestart Boolean: is this the start of a line?
1439          */
1440         function addWikiTextTitleTidy( $text, &$title, $linestart = true ) {
1441                 $this->addWikiTextTitle( $text, $title, $linestart, true );
1442         }
1443
1444         /**
1445          * Add wikitext with tidy enabled
1446          *
1447          * @param $text String: wikitext
1448          * @param $linestart Boolean: is this the start of a line?
1449          */
1450         public function addWikiTextTidy( $text, $linestart = true ) {
1451                 $title = $this->getTitle();
1452                 $this->addWikiTextTitleTidy( $text, $title, $linestart );
1453         }
1454
1455         /**
1456          * Add wikitext with a custom Title object
1457          *
1458          * @param $text String: wikitext
1459          * @param $title Title object
1460          * @param $linestart Boolean: is this the start of a line?
1461          * @param $tidy Boolean: whether to use tidy
1462          * @param $interface Boolean: whether it is an interface message
1463          *                                                              (for example disables conversion)
1464          */
1465         public function addWikiTextTitle( $text, &$title, $linestart, $tidy = false, $interface = false ) {
1466                 global $wgParser;
1467
1468                 wfProfileIn( __METHOD__ );
1469
1470                 wfIncrStats( 'pcache_not_possible' );
1471
1472                 $popts = $this->parserOptions();
1473                 $oldTidy = $popts->setTidy( $tidy );
1474                 $popts->setInterfaceMessage( (bool) $interface );
1475
1476                 $parserOutput = $wgParser->parse(
1477                         $text, $title, $popts,
1478                         $linestart, true, $this->mRevisionId
1479                 );
1480
1481                 $popts->setTidy( $oldTidy );
1482
1483                 $this->addParserOutput( $parserOutput );
1484
1485                 wfProfileOut( __METHOD__ );
1486         }
1487
1488         /**
1489          * Add a ParserOutput object, but without Html
1490          *
1491          * @param $parserOutput ParserOutput object
1492          */
1493         public function addParserOutputNoText( &$parserOutput ) {
1494                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
1495                 $this->addCategoryLinks( $parserOutput->getCategories() );
1496                 $this->mNewSectionLink = $parserOutput->getNewSection();
1497                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
1498
1499                 $this->mParseWarnings = $parserOutput->getWarnings();
1500                 if ( !$parserOutput->isCacheable() ) {
1501                         $this->enableClientCache( false );
1502                 }
1503                 $this->mNoGallery = $parserOutput->getNoGallery();
1504                 $this->mHeadItems = array_merge( $this->mHeadItems, $parserOutput->getHeadItems() );
1505                 $this->addModules( $parserOutput->getModules() );
1506                 $this->addModuleScripts( $parserOutput->getModuleScripts() );
1507                 $this->addModuleStyles( $parserOutput->getModuleStyles() );
1508                 $this->addModuleMessages( $parserOutput->getModuleMessages() );
1509
1510                 // Template versioning...
1511                 foreach ( (array)$parserOutput->getTemplateIds() as $ns => $dbks ) {
1512                         if ( isset( $this->mTemplateIds[$ns] ) ) {
1513                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
1514                         } else {
1515                                 $this->mTemplateIds[$ns] = $dbks;
1516                         }
1517                 }
1518                 // File versioning...
1519                 foreach ( (array)$parserOutput->getFileSearchOptions() as $dbk => $data ) {
1520                         $this->mImageTimeKeys[$dbk] = $data;
1521                 }
1522
1523                 // Hooks registered in the object
1524                 global $wgParserOutputHooks;
1525                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
1526                         list( $hookName, $data ) = $hookInfo;
1527                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
1528                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
1529                         }
1530                 }
1531
1532                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
1533         }
1534
1535         /**
1536          * Add a ParserOutput object
1537          *
1538          * @param $parserOutput ParserOutput
1539          */
1540         function addParserOutput( &$parserOutput ) {
1541                 $this->addParserOutputNoText( $parserOutput );
1542                 $text = $parserOutput->getText();
1543                 wfRunHooks( 'OutputPageBeforeHTML', array( &$this, &$text ) );
1544                 $this->addHTML( $text );
1545         }
1546
1547
1548         /**
1549          * Add the output of a QuickTemplate to the output buffer
1550          *
1551          * @param $template QuickTemplate
1552          */
1553         public function addTemplate( &$template ) {
1554                 ob_start();
1555                 $template->execute();
1556                 $this->addHTML( ob_get_contents() );
1557                 ob_end_clean();
1558         }
1559
1560         /**
1561          * Parse wikitext and return the HTML.
1562          *
1563          * @param $text String
1564          * @param $linestart Boolean: is this the start of a line?
1565          * @param $interface Boolean: use interface language ($wgLang instead of
1566          *                   $wgContLang) while parsing language sensitive magic
1567          *                   words like GRAMMAR and PLURAL. This also disables
1568          *                                       LanguageConverter.
1569          * @param $language  Language object: target language object, will override
1570          *                   $interface
1571          * @return String: HTML
1572          */
1573         public function parse( $text, $linestart = true, $interface = false, $language = null ) {
1574                 global $wgParser;
1575
1576                 if( is_null( $this->getTitle() ) ) {
1577                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
1578                 }
1579
1580                 $popts = $this->parserOptions();
1581                 if ( $interface ) {
1582                         $popts->setInterfaceMessage( true );
1583                 }
1584                 if ( $language !== null ) {
1585                         $oldLang = $popts->setTargetLanguage( $language );
1586                 }
1587
1588                 $parserOutput = $wgParser->parse(
1589                         $text, $this->getTitle(), $popts,
1590                         $linestart, true, $this->mRevisionId
1591                 );
1592
1593                 if ( $interface ) {
1594                         $popts->setInterfaceMessage( false );
1595                 }
1596                 if ( $language !== null ) {
1597                         $popts->setTargetLanguage( $oldLang );
1598                 }
1599
1600                 return $parserOutput->getText();
1601         }
1602
1603         /**
1604          * Parse wikitext, strip paragraphs, and return the HTML.
1605          *
1606          * @param $text String
1607          * @param $linestart Boolean: is this the start of a line?
1608          * @param $interface Boolean: use interface language ($wgLang instead of
1609          *                   $wgContLang) while parsing language sensitive magic
1610          *                   words like GRAMMAR and PLURAL
1611          * @return String: HTML
1612          */
1613         public function parseInline( $text, $linestart = true, $interface = false ) {
1614                 $parsed = $this->parse( $text, $linestart, $interface );
1615
1616                 $m = array();
1617                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
1618                         $parsed = $m[1];
1619                 }
1620
1621                 return $parsed;
1622         }
1623
1624         /**
1625          * Set the value of the "s-maxage" part of the "Cache-control" HTTP header
1626          *
1627          * @param $maxage Integer: maximum cache time on the Squid, in seconds.
1628          */
1629         public function setSquidMaxage( $maxage ) {
1630                 $this->mSquidMaxage = $maxage;
1631         }
1632
1633         /**
1634          * Use enableClientCache(false) to force it to send nocache headers
1635          *
1636          * @param $state bool
1637          *
1638          * @return bool
1639          */
1640         public function enableClientCache( $state ) {
1641                 return wfSetVar( $this->mEnableClientCache, $state );
1642         }
1643
1644         /**
1645          * Get the list of cookies that will influence on the cache
1646          *
1647          * @return Array
1648          */
1649         function getCacheVaryCookies() {
1650                 global $wgCookiePrefix, $wgCacheVaryCookies;
1651                 static $cookies;
1652                 if ( $cookies === null ) {
1653                         $cookies = array_merge(
1654                                 array(
1655                                         "{$wgCookiePrefix}Token",
1656                                         "{$wgCookiePrefix}LoggedOut",
1657                                         session_name()
1658                                 ),
1659                                 $wgCacheVaryCookies
1660                         );
1661                         wfRunHooks( 'GetCacheVaryCookies', array( $this, &$cookies ) );
1662                 }
1663                 return $cookies;
1664         }
1665
1666         /**
1667          * Return whether this page is not cacheable because "useskin" or "uselang"
1668          * URL parameters were passed.
1669          *
1670          * @return Boolean
1671          */
1672         function uncacheableBecauseRequestVars() {
1673                 $request = $this->getRequest();
1674                 return $request->getText( 'useskin', false ) === false
1675                         && $request->getText( 'uselang', false ) === false;
1676         }
1677
1678         /**
1679          * Check if the request has a cache-varying cookie header
1680          * If it does, it's very important that we don't allow public caching
1681          *
1682          * @return Boolean
1683          */
1684         function haveCacheVaryCookies() {
1685                 $cookieHeader = $this->getRequest()->getHeader( 'cookie' );
1686                 if ( $cookieHeader === false ) {
1687                         return false;
1688                 }
1689                 $cvCookies = $this->getCacheVaryCookies();
1690                 foreach ( $cvCookies as $cookieName ) {
1691                         # Check for a simple string match, like the way squid does it
1692                         if ( strpos( $cookieHeader, $cookieName ) !== false ) {
1693                                 wfDebug( __METHOD__ . ": found $cookieName\n" );
1694                                 return true;
1695                         }
1696                 }
1697                 wfDebug( __METHOD__ . ": no cache-varying cookies found\n" );
1698                 return false;
1699         }
1700
1701         /**
1702          * Add an HTTP header that will influence on the cache
1703          *
1704          * @param $header String: header name
1705          * @param $option Array|null
1706          * @todo FIXME: Document the $option parameter; it appears to be for
1707          *        X-Vary-Options but what format is acceptable?
1708          */
1709         public function addVaryHeader( $header, $option = null ) {
1710                 if ( !array_key_exists( $header, $this->mVaryHeader ) ) {
1711                         $this->mVaryHeader[$header] = (array)$option;
1712                 } elseif( is_array( $option ) ) {
1713                         if( is_array( $this->mVaryHeader[$header] ) ) {
1714                                 $this->mVaryHeader[$header] = array_merge( $this->mVaryHeader[$header], $option );
1715                         } else {
1716                                 $this->mVaryHeader[$header] = $option;
1717                         }
1718                 }
1719                 $this->mVaryHeader[$header] = array_unique( (array)$this->mVaryHeader[$header] );
1720         }
1721
1722         /**
1723          * Get a complete X-Vary-Options header
1724          *
1725          * @return String
1726          */
1727         public function getXVO() {
1728                 $cvCookies = $this->getCacheVaryCookies();
1729
1730                 $cookiesOption = array();
1731                 foreach ( $cvCookies as $cookieName ) {
1732                         $cookiesOption[] = 'string-contains=' . $cookieName;
1733                 }
1734                 $this->addVaryHeader( 'Cookie', $cookiesOption );
1735
1736                 $headers = array();
1737                 foreach( $this->mVaryHeader as $header => $option ) {
1738                         $newheader = $header;
1739                         if( is_array( $option ) ) {
1740                                 $newheader .= ';' . implode( ';', $option );
1741                         }
1742                         $headers[] = $newheader;
1743                 }
1744                 $xvo = 'X-Vary-Options: ' . implode( ',', $headers );
1745
1746                 return $xvo;
1747         }
1748
1749         /**
1750          * bug 21672: Add Accept-Language to Vary and XVO headers
1751          * if there's no 'variant' parameter existed in GET.
1752          *
1753          * For example:
1754          *   /w/index.php?title=Main_page should always be served; but
1755          *   /w/index.php?title=Main_page&variant=zh-cn should never be served.
1756          */
1757         function addAcceptLanguage() {
1758                 $lang = $this->getTitle()->getPageLanguage();
1759                 if( !$this->getRequest()->getCheck( 'variant' ) && $lang->hasVariants() ) {
1760                         $variants = $lang->getVariants();
1761                         $aloption = array();
1762                         foreach ( $variants as $variant ) {
1763                                 if( $variant === $lang->getCode() ) {
1764                                         continue;
1765                                 } else {
1766                                         $aloption[] = 'string-contains=' . $variant;
1767
1768                                         // IE and some other browsers use another form of language code
1769                                         // in their Accept-Language header, like "zh-CN" or "zh-TW".
1770                                         // We should handle these too.
1771                                         $ievariant = explode( '-', $variant );
1772                                         if ( count( $ievariant ) == 2 ) {
1773                                                 $ievariant[1] = strtoupper( $ievariant[1] );
1774                                                 $ievariant = implode( '-', $ievariant );
1775                                                 $aloption[] = 'string-contains=' . $ievariant;
1776                                         }
1777                                 }
1778                         }
1779                         $this->addVaryHeader( 'Accept-Language', $aloption );
1780                 }
1781         }
1782
1783         /**
1784          * Set a flag which will cause an X-Frame-Options header appropriate for
1785          * edit pages to be sent. The header value is controlled by
1786          * $wgEditPageFrameOptions.
1787          *
1788          * This is the default for special pages. If you display a CSRF-protected
1789          * form on an ordinary view page, then you need to call this function.
1790          *
1791          * @param $enable bool
1792          */
1793         public function preventClickjacking( $enable = true ) {
1794                 $this->mPreventClickjacking = $enable;
1795         }
1796
1797         /**
1798          * Turn off frame-breaking. Alias for $this->preventClickjacking(false).
1799          * This can be called from pages which do not contain any CSRF-protected
1800          * HTML form.
1801          */
1802         public function allowClickjacking() {
1803                 $this->mPreventClickjacking = false;
1804         }
1805
1806         /**
1807          * Get the X-Frame-Options header value (without the name part), or false
1808          * if there isn't one. This is used by Skin to determine whether to enable
1809          * JavaScript frame-breaking, for clients that don't support X-Frame-Options.
1810          *
1811          * @return string
1812          */
1813         public function getFrameOptions() {
1814                 global $wgBreakFrames, $wgEditPageFrameOptions;
1815                 if ( $wgBreakFrames ) {
1816                         return 'DENY';
1817                 } elseif ( $this->mPreventClickjacking && $wgEditPageFrameOptions ) {
1818                         return $wgEditPageFrameOptions;
1819                 }
1820                 return false;
1821         }
1822
1823         /**
1824          * Send cache control HTTP headers
1825          */
1826         public function sendCacheControl() {
1827                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgUseXVO;
1828
1829                 $response = $this->getRequest()->response();
1830                 if ( $wgUseETag && $this->mETag ) {
1831                         $response->header( "ETag: $this->mETag" );
1832                 }
1833
1834                 $this->addAcceptLanguage();
1835
1836                 # don't serve compressed data to clients who can't handle it
1837                 # maintain different caches for logged-in users and non-logged in ones
1838                 $response->header( 'Vary: ' . join( ', ', array_keys( $this->mVaryHeader ) ) );
1839
1840                 if ( $wgUseXVO ) {
1841                         # Add an X-Vary-Options header for Squid with Wikimedia patches
1842                         $response->header( $this->getXVO() );
1843                 }
1844
1845                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
1846                         if(
1847                                 $wgUseSquid && session_id() == '' && !$this->isPrintable() &&
1848                                 $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies()
1849                         )
1850                         {
1851                                 if ( $wgUseESI ) {
1852                                         # We'll purge the proxy cache explicitly, but require end user agents
1853                                         # to revalidate against the proxy on each visit.
1854                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
1855                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
1856                                         # start with a shorter timeout for initial testing
1857                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
1858                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
1859                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
1860                                 } else {
1861                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
1862                                         # to revalidate against the proxy on each visit.
1863                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
1864                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
1865                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
1866                                         # start with a shorter timeout for initial testing
1867                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
1868                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
1869                                 }
1870                         } else {
1871                                 # We do want clients to cache if they can, but they *must* check for updates
1872                                 # on revisiting the page.
1873                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
1874                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1875                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
1876                         }
1877                         if($this->mLastModified) {
1878                                 $response->header( "Last-Modified: {$this->mLastModified}" );
1879                         }
1880                 } else {
1881                         wfDebug( __METHOD__ . ": no caching **\n", false );
1882
1883                         # In general, the absence of a last modified header should be enough to prevent
1884                         # the client from using its cache. We send a few other things just to make sure.
1885                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1886                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
1887                         $response->header( 'Pragma: no-cache' );
1888                 }
1889         }
1890
1891         /**
1892          * Get the message associed with the HTTP response code $code
1893          *
1894          * @param $code Integer: status code
1895          * @return String or null: message or null if $code is not in the list of
1896          *         messages
1897          *
1898          * @deprecated since 1.18 Use HttpStatus::getMessage() instead.
1899          */
1900         public static function getStatusMessage( $code ) {
1901                 wfDeprecated( __METHOD__ );
1902                 return HttpStatus::getMessage( $code );
1903         }
1904
1905         /**
1906          * Finally, all the text has been munged and accumulated into
1907          * the object, let's actually output it:
1908          */
1909         public function output() {
1910                 global $wgLanguageCode, $wgDebugRedirects, $wgMimeType, $wgVaryOnXFP;
1911
1912                 if( $this->mDoNothing ) {
1913                         return;
1914                 }
1915
1916                 wfProfileIn( __METHOD__ );
1917
1918                 $response = $this->getRequest()->response();
1919
1920                 if ( $this->mRedirect != '' ) {
1921                         # Standards require redirect URLs to be absolute
1922                         $this->mRedirect = wfExpandUrl( $this->mRedirect, PROTO_CURRENT );
1923
1924                         $redirect = $this->mRedirect;
1925                         $code = $this->mRedirectCode;
1926
1927                         if( wfRunHooks( "BeforePageRedirect", array( $this, &$redirect, &$code ) ) ) {
1928                                 if( $code == '301' || $code == '303' ) {
1929                                         if( !$wgDebugRedirects ) {
1930                                                 $message = HttpStatus::getMessage( $code );
1931                                                 $response->header( "HTTP/1.1 $code $message" );
1932                                         }
1933                                         $this->mLastModified = wfTimestamp( TS_RFC2822 );
1934                                 }
1935                                 if ( $wgVaryOnXFP ) {
1936                                         $this->addVaryHeader( 'X-Forwarded-Proto' );
1937                                 }
1938                                 $this->sendCacheControl();
1939
1940                                 $response->header( "Content-Type: text/html; charset=utf-8" );
1941                                 if( $wgDebugRedirects ) {
1942                                         $url = htmlspecialchars( $redirect );
1943                                         print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
1944                                         print "<p>Location: <a href=\"$url\">$url</a></p>\n";
1945                                         print "</body>\n</html>\n";
1946                                 } else {
1947                                         $response->header( 'Location: ' . $redirect );
1948                                 }
1949                         }
1950
1951                         wfProfileOut( __METHOD__ );
1952                         return;
1953                 } elseif ( $this->mStatusCode ) {
1954                         $message = HttpStatus::getMessage( $this->mStatusCode );
1955                         if ( $message ) {
1956                                 $response->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $message );
1957                         }
1958                 }
1959
1960                 # Buffer output; final headers may depend on later processing
1961                 ob_start();
1962
1963                 $response->header( "Content-type: $wgMimeType; charset=UTF-8" );
1964                 $response->header( 'Content-language: ' . $wgLanguageCode );
1965
1966                 // Prevent framing, if requested
1967                 $frameOptions = $this->getFrameOptions();
1968                 if ( $frameOptions ) {
1969                         $response->header( "X-Frame-Options: $frameOptions" );
1970                 }
1971
1972                 if ( $this->mArticleBodyOnly ) {
1973                         $this->out( $this->mBodytext );
1974                 } else {
1975                         $this->addDefaultModules();
1976
1977                         $sk = $this->getSkin();
1978
1979                         // Hook that allows last minute changes to the output page, e.g.
1980                         // adding of CSS or Javascript by extensions.
1981                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1982
1983                         wfProfileIn( 'Output-skin' );
1984                         $sk->outputPage();
1985                         wfProfileOut( 'Output-skin' );
1986                 }
1987
1988                 $this->sendCacheControl();
1989                 ob_end_flush();
1990                 wfProfileOut( __METHOD__ );
1991         }
1992
1993         /**
1994          * Actually output something with print().
1995          *
1996          * @param $ins String: the string to output
1997          */
1998         public function out( $ins ) {
1999                 print $ins;
2000         }
2001
2002         /**
2003          * Produce a "user is blocked" page.
2004          * @deprecated since 1.18
2005          */
2006         function blockedPage() {
2007                 throw new UserBlockedError( $this->getUser()->mBlock );
2008         }
2009
2010         /**
2011          * Prepare this object to display an error page; disable caching and
2012          * indexing, clear the current text and redirect, set the page's title
2013          * and optionally an custom HTML title (content of the <title> tag).
2014          *
2015          * @param $pageTitle String|Message will be passed directly to setPageTitle()
2016          * @param $htmlTitle String|Message will be passed directly to setHTMLTitle();
2017          *                   optional, if not passed the <title> attribute will be
2018          *                   based on $pageTitle
2019          */
2020         public function prepareErrorPage( $pageTitle, $htmlTitle = false ) {
2021                 if ( $this->getTitle() ) {
2022                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
2023                 }
2024
2025                 $this->setPageTitle( $pageTitle );
2026                 if ( $htmlTitle !== false ) {
2027                         $this->setHTMLTitle( $htmlTitle );
2028                 }
2029                 $this->setRobotPolicy( 'noindex,nofollow' );
2030                 $this->setArticleRelated( false );
2031                 $this->enableClientCache( false );
2032                 $this->mRedirect = '';
2033                 $this->clearSubtitle();
2034                 $this->clearHTML();
2035         }
2036
2037         /**
2038          * Output a standard error page
2039          *
2040          * showErrorPage( 'titlemsg', 'pagetextmsg', array( 'param1', 'param2' ) );
2041          * showErrorPage( 'titlemsg', $messageObject );
2042          *
2043          * @param $title String: message key for page title
2044          * @param $msg Mixed: message key (string) for page text, or a Message object
2045          * @param $params Array: message parameters; ignored if $msg is a Message object
2046          */
2047         public function showErrorPage( $title, $msg, $params = array() ) {
2048                 $this->prepareErrorPage( $this->msg( $title ), $this->msg( 'errorpagetitle' ) );
2049
2050                 if ( $msg instanceof Message ){
2051                         $this->addHTML( $msg->parse() );
2052                 } else {
2053                         $this->addWikiMsgArray( $msg, $params );
2054                 }
2055
2056                 $this->returnToMain();
2057         }
2058
2059         /**
2060          * Output a standard permission error page
2061          *
2062          * @param $errors Array: error message keys
2063          * @param $action String: action that was denied or null if unknown
2064          */
2065         public function showPermissionsErrorPage( $errors, $action = null ) {
2066                 global $wgGroupPermissions;
2067
2068                 // For some action (read, edit, create and upload), display a "login to do this action"
2069                 // error if all of the following conditions are met:
2070                 // 1. the user is not logged in
2071                 // 2. the only error is insufficient permissions (i.e. no block or something else)
2072                 // 3. the error can be avoided simply by logging in
2073                 if ( in_array( $action, array( 'read', 'edit', 'createpage', 'createtalk', 'upload' ) )
2074                         && $this->getUser()->isAnon() && count( $errors ) == 1 && isset( $errors[0][0] )
2075                         && ( $errors[0][0] == 'badaccess-groups' || $errors[0][0] == 'badaccess-group0' )
2076                         && ( ( isset( $wgGroupPermissions['user'][$action] ) && $wgGroupPermissions['user'][$action] )
2077                         || ( isset( $wgGroupPermissions['autoconfirmed'][$action] ) && $wgGroupPermissions['autoconfirmed'][$action] ) )
2078                 ) {
2079                         $displayReturnto = null;
2080
2081                         # Due to bug 32276, if a user does not have read permissions,
2082                         # $this->getTitle() will just give Special:Badtitle, which is
2083                         # not especially useful as a returnto parameter. Use the title
2084                         # from the request instead, if there was one.
2085                         $request = $this->getRequest();
2086                         $returnto = Title::newFromURL( $request->getVal( 'title', '' ) );
2087                         if ( $action == 'edit' ) {
2088                                 $msg = 'whitelistedittext';
2089                                 $displayReturnto = $returnto;
2090                         } elseif ( $action == 'createpage' || $action == 'createtalk' ) {
2091                                 $msg = 'nocreatetext';
2092                         } elseif ( $action == 'upload' ) {
2093                                 $msg = 'uploadnologintext';
2094                         } else { # Read
2095                                 $msg = 'loginreqpagetext';
2096                                 $displayReturnto = Title::newMainPage();
2097                         }
2098
2099                         $query = array();
2100
2101                         if ( $returnto ) {
2102                                 $query['returnto'] = $returnto->getPrefixedText();
2103
2104                                 if ( !$request->wasPosted() ) {
2105                                         $returntoquery = $request->getValues();
2106                                         unset( $returntoquery['title'] );
2107                                         unset( $returntoquery['returnto'] );
2108                                         unset( $returntoquery['returntoquery'] );
2109                                         $query['returntoquery'] = wfArrayToCGI( $returntoquery );
2110                                 }
2111                         }
2112                         $loginLink = Linker::linkKnown(
2113                                 SpecialPage::getTitleFor( 'Userlogin' ),
2114                                 $this->msg( 'loginreqlink' )->escaped(),
2115                                 array(),
2116                                 $query
2117                         );
2118
2119                         $this->prepareErrorPage( $this->msg( 'loginreqtitle' ) );
2120                         $this->addHTML( $this->msg( $msg )->rawParams( $loginLink )->parse() );
2121
2122                         # Don't return to a page the user can't read otherwise
2123                         # we'll end up in a pointless loop
2124                         if ( $displayReturnto && $displayReturnto->userCan( 'read', $this->getUser() ) ) {
2125                                 $this->returnToMain( null, $displayReturnto );
2126                         }
2127                 } else {
2128                         $this->prepareErrorPage( $this->msg( 'permissionserrors' ) );
2129                         $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
2130                 }
2131         }
2132
2133         /**
2134          * Display an error page indicating that a given version of MediaWiki is
2135          * required to use it
2136          *
2137          * @param $version Mixed: the version of MediaWiki needed to use the page
2138          */
2139         public function versionRequired( $version ) {
2140                 $this->prepareErrorPage( $this->msg( 'versionrequired', $version ) );
2141
2142                 $this->addWikiMsg( 'versionrequiredtext', $version );
2143                 $this->returnToMain();
2144         }
2145
2146         /**
2147          * Display an error page noting that a given permission bit is required.
2148          * @deprecated since 1.18, just throw the exception directly
2149          * @param $permission String: key required
2150          */
2151         public function permissionRequired( $permission ) {
2152                 throw new PermissionsError( $permission );
2153         }
2154
2155         /**
2156          * Produce the stock "please login to use the wiki" page
2157          *
2158          * @deprecated in 1.19; throw the exception directly
2159          */
2160         public function loginToUse() {
2161                 throw new PermissionsError( 'read' );
2162         }
2163
2164         /**
2165          * Format a list of error messages
2166          *
2167          * @param $errors Array of arrays returned by Title::getUserPermissionsErrors
2168          * @param $action String: action that was denied or null if unknown
2169          * @return String: the wikitext error-messages, formatted into a list.
2170          */
2171         public function formatPermissionsErrorMessage( $errors, $action = null ) {
2172                 if ( $action == null ) {
2173                         $text = $this->msg( 'permissionserrorstext', count( $errors ) )->plain() . "\n\n";
2174                 } else {
2175                         $action_desc = $this->msg( "action-$action" )->plain();
2176                         $text = $this->msg(
2177                                 'permissionserrorstext-withaction',
2178                                 count( $errors ),
2179                                 $action_desc
2180                         )->plain() . "\n\n";
2181                 }
2182
2183                 if ( count( $errors ) > 1 ) {
2184                         $text .= '<ul class="permissions-errors">' . "\n";
2185
2186                         foreach( $errors as $error ) {
2187                                 $text .= '<li>';
2188                                 $text .= call_user_func_array( array( $this, 'msg' ), $error )->plain();
2189                                 $text .= "</li>\n";
2190                         }
2191                         $text .= '</ul>';
2192                 } else {
2193                         $text .= "<div class=\"permissions-errors\">\n" .
2194                                         call_user_func_array( array( $this, 'msg' ), reset( $errors ) )->plain() .
2195                                         "\n</div>";
2196                 }
2197
2198                 return $text;
2199         }
2200
2201         /**
2202          * Display a page stating that the Wiki is in read-only mode,
2203          * and optionally show the source of the page that the user
2204          * was trying to edit.  Should only be called (for this
2205          * purpose) after wfReadOnly() has returned true.
2206          *
2207          * For historical reasons, this function is _also_ used to
2208          * show the error message when a user tries to edit a page
2209          * they are not allowed to edit.  (Unless it's because they're
2210          * blocked, then we show blockedPage() instead.)  In this
2211          * case, the second parameter should be set to true and a list
2212          * of reasons supplied as the third parameter.
2213          *
2214          * @todo Needs to be split into multiple functions.
2215          *
2216          * @param $source    String: source code to show (or null).
2217          * @param $protected Boolean: is this a permissions error?
2218          * @param $reasons   Array: list of reasons for this error, as returned by Title::getUserPermissionsErrors().
2219          * @param $action    String: action that was denied or null if unknown
2220          */
2221         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
2222                 $this->setRobotPolicy( 'noindex,nofollow' );
2223                 $this->setArticleRelated( false );
2224
2225                 // If no reason is given, just supply a default "I can't let you do
2226                 // that, Dave" message.  Should only occur if called by legacy code.
2227                 if ( $protected && empty( $reasons ) ) {
2228                         $reasons[] = array( 'badaccess-group0' );
2229                 }
2230
2231                 if ( !empty( $reasons ) ) {
2232                         // Permissions error
2233                         if( $source ) {
2234                                 $this->setPageTitle( $this->msg( 'viewsource-title', $this->getTitle()->getPrefixedText() ) );
2235                                 $this->addBacklinkSubtitle( $this->getTitle() );
2236                         } else {
2237                                 $this->setPageTitle( $this->msg( 'badaccess' ) );
2238                         }
2239                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
2240                 } else {
2241                         // Wiki is read only
2242                         throw new ReadOnlyError;
2243                 }
2244
2245                 // Show source, if supplied
2246                 if( is_string( $source ) ) {
2247                         $this->addWikiMsg( 'viewsourcetext' );
2248
2249                         $pageLang = $this->getTitle()->getPageLanguage();
2250                         $params = array(
2251                                 'id'   => 'wpTextbox1',
2252                                 'name' => 'wpTextbox1',
2253                                 'rows' => $this->getUser()->getOption( 'rows' ),
2254                                 'readonly' => 'readonly',
2255                                 'lang' => $pageLang->getHtmlCode(),
2256                                 'dir' => $pageLang->getDir(),
2257                         );
2258                         $this->addHTML( Html::element( 'textarea', $params, $source ) );
2259
2260                         // Show templates used by this article
2261                         $templates = Linker::formatTemplates( $this->getTitle()->getTemplateLinksFrom() );
2262                         $this->addHTML( "<div class='templatesUsed'>
2263 $templates
2264 </div>
2265 " );
2266                 }
2267
2268                 # If the title doesn't exist, it's fairly pointless to print a return
2269                 # link to it.  After all, you just tried editing it and couldn't, so
2270                 # what's there to do there?
2271                 if( $this->getTitle()->exists() ) {
2272                         $this->returnToMain( null, $this->getTitle() );
2273                 }
2274         }
2275
2276         /**
2277          * Turn off regular page output and return an error reponse
2278          * for when rate limiting has triggered.
2279          */
2280         public function rateLimited() {
2281                 throw new ThrottledError;
2282         }
2283
2284         /**
2285          * Show a warning about slave lag
2286          *
2287          * If the lag is higher than $wgSlaveLagCritical seconds,
2288          * then the warning is a bit more obvious. If the lag is
2289          * lower than $wgSlaveLagWarning, then no warning is shown.
2290          *
2291          * @param $lag Integer: slave lag
2292          */
2293         public function showLagWarning( $lag ) {
2294                 global $wgSlaveLagWarning, $wgSlaveLagCritical;
2295                 if( $lag >= $wgSlaveLagWarning ) {
2296                         $message = $lag < $wgSlaveLagCritical
2297                                 ? 'lag-warn-normal'
2298                                 : 'lag-warn-high';
2299                         $wrap = Html::rawElement( 'div', array( 'class' => "mw-{$message}" ), "\n$1\n" );
2300                         $this->wrapWikiMsg( "$wrap\n", array( $message, $this->getLanguage()->formatNum( $lag ) ) );
2301                 }
2302         }
2303
2304         public function showFatalError( $message ) {
2305                 $this->prepareErrorPage( $this->msg( 'internalerror' ) );
2306
2307                 $this->addHTML( $message );
2308         }
2309
2310         public function showUnexpectedValueError( $name, $val ) {
2311                 $this->showFatalError( $this->msg( 'unexpected', $name, $val )->text() );
2312         }
2313
2314         public function showFileCopyError( $old, $new ) {
2315                 $this->showFatalError( $this->msg( 'filecopyerror', $old, $new )->text() );
2316         }
2317
2318         public function showFileRenameError( $old, $new ) {
2319                 $this->showFatalError( $this->msg( 'filerenameerror', $old, $new )->text() );
2320         }
2321
2322         public function showFileDeleteError( $name ) {
2323                 $this->showFatalError( $this->msg( 'filedeleteerror', $name )->text() );
2324         }
2325
2326         public function showFileNotFoundError( $name ) {
2327                 $this->showFatalError( $this->msg( 'filenotfound', $name )->text() );
2328         }
2329
2330         /**
2331          * Add a "return to" link pointing to a specified title
2332          *
2333          * @param $title Title to link
2334          * @param $query String query string
2335          * @param $text String text of the link (input is not escaped)
2336          */
2337         public function addReturnTo( $title, $query = array(), $text = null ) {
2338                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullURL() ) );
2339                 $link = $this->msg( 'returnto' )->rawParams(
2340                         Linker::link( $title, $text, array(), $query ) )->escaped();
2341                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
2342         }
2343
2344         /**
2345          * Add a "return to" link pointing to a specified title,
2346          * or the title indicated in the request, or else the main page
2347          *
2348          * @param $unused No longer used
2349          * @param $returnto Title or String to return to
2350          * @param $returntoquery String: query string for the return to link
2351          */
2352         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
2353                 if ( $returnto == null ) {
2354                         $returnto = $this->getRequest()->getText( 'returnto' );
2355                 }
2356
2357                 if ( $returntoquery == null ) {
2358                         $returntoquery = $this->getRequest()->getText( 'returntoquery' );
2359                 }
2360
2361                 if ( $returnto === '' ) {
2362                         $returnto = Title::newMainPage();
2363                 }
2364
2365                 if ( is_object( $returnto ) ) {
2366                         $titleObj = $returnto;
2367                 } else {
2368                         $titleObj = Title::newFromText( $returnto );
2369                 }
2370                 if ( !is_object( $titleObj ) ) {
2371                         $titleObj = Title::newMainPage();
2372                 }
2373
2374                 $this->addReturnTo( $titleObj, $returntoquery );
2375         }
2376
2377         /**
2378          * @param $sk Skin The given Skin
2379          * @param $includeStyle Boolean: unused
2380          * @return String: The doctype, opening <html>, and head element.
2381          */
2382         public function headElement( Skin $sk, $includeStyle = true ) {
2383                 global $wgContLang;
2384                 $userdir = $this->getLanguage()->getDir();
2385                 $sitedir = $wgContLang->getDir();
2386
2387                 if ( $sk->commonPrintStylesheet() ) {
2388                         $this->addModuleStyles( 'mediawiki.legacy.wikiprintable' );
2389                 }
2390
2391                 $ret = Html::htmlHeader( array( 'lang' => $this->getLanguage()->getHtmlCode(), 'dir' => $userdir, 'class' => 'client-nojs' ) );
2392
2393                 if ( $this->getHTMLTitle() == '' ) {
2394                         $this->setHTMLTitle( $this->msg( 'pagetitle', $this->getPageTitle() ) );
2395                 }
2396
2397                 $openHead = Html::openElement( 'head' );
2398                 if ( $openHead ) {
2399                         # Don't bother with the newline if $head == ''
2400                         $ret .= "$openHead\n";
2401                 }
2402
2403                 $ret .= Html::element( 'title', null, $this->getHTMLTitle() ) . "\n";
2404
2405                 $ret .= implode( "\n", array(
2406                         $this->getHeadLinks( null, true ),
2407                         $this->buildCssLinks(),
2408                         $this->getHeadScripts(),
2409                         $this->getHeadItems()
2410                 ) );
2411
2412                 $closeHead = Html::closeElement( 'head' );
2413                 if ( $closeHead ) {
2414                         $ret .= "$closeHead\n";
2415                 }
2416
2417                 $bodyAttrs = array();
2418
2419                 # Classes for LTR/RTL directionality support
2420                 $bodyAttrs['class'] = "mediawiki $userdir sitedir-$sitedir";
2421
2422                 if ( $this->getLanguage()->capitalizeAllNouns() ) {
2423                         # A <body> class is probably not the best way to do this . . .
2424                         $bodyAttrs['class'] .= ' capitalize-all-nouns';
2425                 }
2426                 $bodyAttrs['class'] .= ' ' . $sk->getPageClasses( $this->getTitle() );
2427                 $bodyAttrs['class'] .= ' skin-' . Sanitizer::escapeClass( $sk->getSkinName() );
2428
2429                 $sk->addToBodyAttributes( $this, $bodyAttrs ); // Allow skins to add body attributes they need
2430                 wfRunHooks( 'OutputPageBodyAttributes', array( $this, $sk, &$bodyAttrs ) );
2431
2432                 $ret .= Html::openElement( 'body', $bodyAttrs ) . "\n";
2433
2434                 return $ret;
2435         }
2436
2437         /**
2438          * Add the default ResourceLoader modules to this object
2439          */
2440         private function addDefaultModules() {
2441                 global $wgIncludeLegacyJavaScript, $wgUseAjax, $wgAjaxWatch, $wgEnableMWSuggest;
2442
2443                 // Add base resources
2444                 $this->addModules( array(
2445                         'mediawiki.user',
2446                         'mediawiki.util',
2447                         'mediawiki.page.startup',
2448                         'mediawiki.page.ready',
2449                 ) );
2450                 if ( $wgIncludeLegacyJavaScript ){
2451                         $this->addModules( 'mediawiki.legacy.wikibits' );
2452                 }
2453
2454                 // Add various resources if required
2455                 if ( $wgUseAjax ) {
2456                         $this->addModules( 'mediawiki.legacy.ajax' );
2457
2458                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
2459
2460                         if( $wgAjaxWatch && $this->getUser()->isLoggedIn() ) {
2461                                 $this->addModules( 'mediawiki.action.watch.ajax' );
2462                         }
2463
2464                         if ( $wgEnableMWSuggest && !$this->getUser()->getOption( 'disablesuggest', false ) ) {
2465                                 $this->addModules( 'mediawiki.legacy.mwsuggest' );
2466                         }
2467                 }
2468
2469                 if ( $this->getUser()->getBoolOption( 'editsectiononrightclick' ) ) {
2470                         $this->addModules( 'mediawiki.action.view.rightClickEdit' );
2471                 }
2472
2473                 # Crazy edit-on-double-click stuff
2474                 if ( $this->isArticle() && $this->getUser()->getOption( 'editondblclick' ) ) {
2475                         $this->addModules( 'mediawiki.action.view.dblClickEdit' );
2476                 }
2477         }
2478
2479         /**
2480          * Get a ResourceLoader object associated with this OutputPage
2481          *
2482          * @return ResourceLoader
2483          */
2484         public function getResourceLoader() {
2485                 if ( is_null( $this->mResourceLoader ) ) {
2486                         $this->mResourceLoader = new ResourceLoader();
2487                 }
2488                 return $this->mResourceLoader;
2489         }
2490
2491         /**
2492          * TODO: Document
2493          * @param $modules Array/string with the module name(s)
2494          * @param $only String ResourceLoaderModule TYPE_ class constant
2495          * @param $useESI boolean
2496          * @param $extraQuery Array with extra query parameters to add to each request. array( param => value )
2497          * @param $loadCall boolean If true, output a mw.loader.load() call rather than a <script src="..."> tag
2498          * @return string html <script> and <style> tags
2499          */
2500         protected function makeResourceLoaderLink( $modules, $only, $useESI = false, array $extraQuery = array(), $loadCall = false ) {
2501                 global $wgResourceLoaderUseESI, $wgResourceLoaderInlinePrivateModules;
2502
2503                 if ( !count( $modules ) ) {
2504                         return '';
2505                 }
2506
2507                 if ( count( $modules ) > 1 ) {
2508                         // Remove duplicate module requests
2509                         $modules = array_unique( (array) $modules );
2510                         // Sort module names so requests are more uniform
2511                         sort( $modules );
2512
2513                         if ( ResourceLoader::inDebugMode() ) {
2514                                 // Recursively call us for every item
2515                                 $links = '';
2516                                 foreach ( $modules as $name ) {
2517                                         $links .= $this->makeResourceLoaderLink( $name, $only, $useESI );
2518                                 }
2519                                 return $links;
2520                         }
2521                 }
2522
2523                 // Create keyed-by-group list of module objects from modules list
2524                 $groups = array();
2525                 $resourceLoader = $this->getResourceLoader();
2526                 foreach ( (array) $modules as $name ) {
2527                         $module = $resourceLoader->getModule( $name );
2528                         # Check that we're allowed to include this module on this page
2529                         if ( !$module
2530                                 || ( $module->getOrigin() > $this->getAllowedModules( ResourceLoaderModule::TYPE_SCRIPTS )
2531                                         && $only == ResourceLoaderModule::TYPE_SCRIPTS )
2532                                 || ( $module->getOrigin() > $this->getAllowedModules( ResourceLoaderModule::TYPE_STYLES )
2533                                         && $only == ResourceLoaderModule::TYPE_STYLES )
2534                                 )
2535                         {
2536                                 continue;
2537                         }
2538
2539                         $group = $module->getGroup();
2540                         if ( !isset( $groups[$group] ) ) {
2541                                 $groups[$group] = array();
2542                         }
2543                         $groups[$group][$name] = $module;
2544                 }
2545
2546                 $links = '';
2547                 foreach ( $groups as $group => $modules ) {
2548                         // Special handling for user-specific groups
2549                         $user = null;
2550                         if ( ( $group === 'user' || $group === 'private' ) && $this->getUser()->isLoggedIn() ) {
2551                                 $user = $this->getUser()->getName();
2552                         }
2553
2554                         // Create a fake request based on the one we are about to make so modules return
2555                         // correct timestamp and emptiness data
2556                         $query = ResourceLoader::makeLoaderQuery(
2557                                 array(), // modules; not determined yet
2558                                 $this->getLanguage()->getCode(),
2559                                 $this->getSkin()->getSkinName(),
2560                                 $user,
2561                                 null, // version; not determined yet
2562                                 ResourceLoader::inDebugMode(),
2563                                 $only === ResourceLoaderModule::TYPE_COMBINED ? null : $only,
2564                                 $this->isPrintable(),
2565                                 $this->getRequest()->getBool( 'handheld' ),
2566                                 $extraQuery
2567                         );
2568                         $context = new ResourceLoaderContext( $resourceLoader, new FauxRequest( $query ) );
2569                         // Drop modules that know they're empty
2570                         foreach ( $modules as $key => $module ) {
2571                                 if ( $module->isKnownEmpty( $context ) ) {
2572                                         unset( $modules[$key] );
2573                                 }
2574                         }
2575                         // If there are no modules left, skip this group
2576                         if ( $modules === array() ) {
2577                                 continue;
2578                         }
2579
2580                         // Support inlining of private modules if configured as such. Note that these
2581                         // modules should be loaded from getHeadScripts() before the first loader call.
2582                         // Otherwise other modules can't properly use them as dependencies (bug 30914)
2583                         if ( $group === 'private' && $wgResourceLoaderInlinePrivateModules ) {
2584                                 if ( $only == ResourceLoaderModule::TYPE_STYLES ) {
2585                                         $links .= Html::inlineStyle(
2586                                                 $resourceLoader->makeModuleResponse( $context, $modules )
2587                                         );
2588                                 } else {
2589                                         $links .= Html::inlineScript(
2590                                                 ResourceLoader::makeLoaderConditionalScript(
2591                                                         $resourceLoader->makeModuleResponse( $context, $modules )
2592                                                 )
2593                                         );
2594                                 }
2595                                 $links .= "\n";
2596                                 continue;
2597                         }
2598                         // Special handling for the user group; because users might change their stuff
2599                         // on-wiki like user pages, or user preferences; we need to find the highest
2600                         // timestamp of these user-changable modules so we can ensure cache misses on change
2601                         // This should NOT be done for the site group (bug 27564) because anons get that too
2602                         // and we shouldn't be putting timestamps in Squid-cached HTML
2603                         $version = null;
2604                         if ( $group === 'user' ) {
2605                                 // Get the maximum timestamp
2606                                 $timestamp = 1;
2607                                 foreach ( $modules as $module ) {
2608                                         $timestamp = max( $timestamp, $module->getModifiedTime( $context ) );
2609                                 }
2610                                 // Add a version parameter so cache will break when things change
2611                                 $version = wfTimestamp( TS_ISO_8601_BASIC, $timestamp );
2612                         }
2613
2614                         $url = ResourceLoader::makeLoaderURL(
2615                                 array_keys( $modules ),
2616                                 $this->getLanguage()->getCode(),
2617                                 $this->getSkin()->getSkinName(),
2618                                 $user,
2619                                 $version,
2620                                 ResourceLoader::inDebugMode(),
2621                                 $only === ResourceLoaderModule::TYPE_COMBINED ? null : $only,
2622                                 $this->isPrintable(),
2623                                 $this->getRequest()->getBool( 'handheld' ),
2624                                 $extraQuery
2625                         );
2626                         if ( $useESI && $wgResourceLoaderUseESI ) {
2627                                 $esi = Xml::element( 'esi:include', array( 'src' => $url ) );
2628                                 if ( $only == ResourceLoaderModule::TYPE_STYLES ) {
2629                                         $link = Html::inlineStyle( $esi );
2630                                 } else {
2631                                         $link = Html::inlineScript( $esi );
2632                                 }
2633                         } else {
2634                                 // Automatically select style/script elements
2635                                 if ( $only === ResourceLoaderModule::TYPE_STYLES ) {
2636                                         $link = Html::linkedStyle( $url );
2637                                 } else if ( $loadCall ) {
2638                                         $link = Html::inlineScript(
2639                                                 ResourceLoader::makeLoaderConditionalScript(
2640                                                         Xml::encodeJsCall( 'mw.loader.load', array( $url ) )
2641                                                 )
2642                                         );
2643                                 } else {
2644                                         $link = Html::linkedScript( $url );
2645                                 }
2646                         }
2647
2648                         if( $group == 'noscript' ){
2649                                 $links .= Html::rawElement( 'noscript', array(), $link ) . "\n";
2650                         } else {
2651                                 $links .= $link . "\n";
2652                         }
2653                 }
2654                 return $links;
2655         }
2656
2657         /**
2658          * JS stuff to put in the <head>. This is the startup module, config
2659          * vars and modules marked with position 'top'
2660          *
2661          * @return String: HTML fragment
2662          */
2663         function getHeadScripts() {
2664                 global $wgResourceLoaderExperimentalAsyncLoading;
2665
2666                 // Startup - this will immediately load jquery and mediawiki modules
2667                 $scripts = $this->makeResourceLoaderLink( 'startup', ResourceLoaderModule::TYPE_SCRIPTS, true );
2668
2669                 // Load config before anything else
2670                 $scripts .= Html::inlineScript(
2671                         ResourceLoader::makeLoaderConditionalScript(
2672                                 ResourceLoader::makeConfigSetScript( $this->getJSVars() )
2673                         )
2674                 );
2675
2676                 // Load embeddable private modules before any loader links
2677                 $embedScripts = array( 'user.options', 'user.tokens' );
2678                 $scripts .= $this->makeResourceLoaderLink( $embedScripts, ResourceLoaderModule::TYPE_COMBINED );
2679
2680                 // Script and Messages "only" requests marked for top inclusion
2681                 // Messages should go first
2682                 $scripts .= $this->makeResourceLoaderLink( $this->getModuleMessages( true, 'top' ), ResourceLoaderModule::TYPE_MESSAGES );
2683                 $scripts .= $this->makeResourceLoaderLink( $this->getModuleScripts( true, 'top' ), ResourceLoaderModule::TYPE_SCRIPTS );
2684
2685                 // Modules requests - let the client calculate dependencies and batch requests as it likes
2686                 // Only load modules that have marked themselves for loading at the top
2687                 $modules = $this->getModules( true, 'top' );
2688                 if ( $modules ) {
2689                         $scripts .= Html::inlineScript(
2690                                 ResourceLoader::makeLoaderConditionalScript(
2691                                         "mw.loader.setBlocking( true );\n" .
2692                                         Xml::encodeJsCall( 'mw.loader.load', array( $modules ) ) .
2693                                         "\nmw.loader.setBlocking( false );"
2694                                 )
2695                         );
2696                 }
2697
2698                 if ( $wgResourceLoaderExperimentalAsyncLoading ) {
2699                         $scripts .= $this->getScriptsForBottomQueue( true );
2700                 }
2701
2702                 return $scripts;
2703         }
2704
2705         /**
2706          * JS stuff to put at the 'bottom', which can either be the bottom of the <body>
2707          * or the bottom of the <head> depending on $wgResourceLoaderExperimentalAsyncLoading:
2708          * modules marked with position 'bottom', legacy scripts ($this->mScripts),
2709          * user preferences, site JS and user JS
2710          *
2711          * @param $inHead boolean If true, this HTML goes into the <head>, if false it goes into the <body>
2712          * @return string
2713          */
2714         function getScriptsForBottomQueue( $inHead ) {
2715                 global $wgUseSiteJs, $wgAllowUserJs;
2716
2717                 // Script and Messages "only" requests marked for bottom inclusion
2718                 // If we're in the <head>, use load() calls rather than <script src="..."> tags
2719                 // Messages should go first
2720                 $scripts = $this->makeResourceLoaderLink( $this->getModuleMessages( true, 'bottom' ),
2721                         ResourceLoaderModule::TYPE_MESSAGES, /* $useESI = */ false, /* $extraQuery = */ array(),
2722                         /* $loadCall = */ $inHead
2723                 );
2724                 $scripts .= $this->makeResourceLoaderLink( $this->getModuleScripts( true, 'bottom' ),
2725                         ResourceLoaderModule::TYPE_SCRIPTS, /* $useESI = */ false, /* $extraQuery = */ array(),
2726                         /* $loadCall = */ $inHead
2727                 );
2728
2729                 // Modules requests - let the client calculate dependencies and batch requests as it likes
2730                 // Only load modules that have marked themselves for loading at the bottom
2731                 $modules = $this->getModules( true, 'bottom' );
2732                 if ( $modules ) {
2733                         $scripts .= Html::inlineScript(
2734                                 ResourceLoader::makeLoaderConditionalScript(
2735                                         Xml::encodeJsCall( 'mw.loader.load', array( $modules ) )
2736                                 )
2737                         );
2738                 }
2739
2740                 // Legacy Scripts
2741                 $scripts .= "\n" . $this->mScripts;
2742
2743                 $userScripts = array();
2744
2745                 // Add site JS if enabled
2746                 if ( $wgUseSiteJs ) {
2747                         $scripts .= $this->makeResourceLoaderLink( 'site', ResourceLoaderModule::TYPE_SCRIPTS,
2748                                 /* $useESI = */ false, /* $extraQuery = */ array(), /* $loadCall = */ $inHead
2749                         );
2750                         if( $this->getUser()->isLoggedIn() ){
2751                                 $userScripts[] = 'user.groups';
2752                         }
2753                 }
2754
2755                 // Add user JS if enabled
2756                 if ( $wgAllowUserJs && $this->getUser()->isLoggedIn() ) {
2757                         if( $this->getTitle() && $this->getTitle()->isJsSubpage() && $this->userCanPreview() ) {
2758                                 # XXX: additional security check/prompt?
2759                                 // We're on a preview of a JS subpage
2760                                 // Exclude this page from the user module in case it's in there (bug 26283)
2761                                 $scripts .= $this->makeResourceLoaderLink( 'user', ResourceLoaderModule::TYPE_SCRIPTS, false,
2762                                         array( 'excludepage' => $this->getTitle()->getPrefixedDBkey() ), $inHead
2763                                 );
2764                                 // Load the previewed JS
2765                                 $scripts .= Html::inlineScript( "\n" . $this->getRequest()->getText( 'wpTextbox1' ) . "\n" ) . "\n";
2766                         } else {
2767                                 // Include the user module normally
2768                                 // We can't do $userScripts[] = 'user'; because the user module would end up
2769                                 // being wrapped in a closure, so load it raw like 'site'
2770                                 $scripts .= $this->makeResourceLoaderLink( 'user', ResourceLoaderModule::TYPE_SCRIPTS,
2771                                         /* $useESI = */ false, /* $extraQuery = */ array(), /* $loadCall = */ $inHead
2772                                 );
2773                         }
2774                 }
2775                 $scripts .= $this->makeResourceLoaderLink( $userScripts, ResourceLoaderModule::TYPE_COMBINED,
2776                         /* $useESI = */ false, /* $extraQuery = */ array(), /* $loadCall = */ $inHead
2777                 );
2778
2779                 return $scripts;
2780         }
2781
2782         /**
2783          * JS stuff to put at the bottom of the <body>
2784          */
2785         function getBottomScripts() {
2786                 global $wgResourceLoaderExperimentalAsyncLoading;
2787                 if ( !$wgResourceLoaderExperimentalAsyncLoading ) {
2788                         return $this->getScriptsForBottomQueue( false );
2789                 } else {
2790                         return '';
2791                 }
2792         }
2793
2794         /**
2795          * Add one or more variables to be set in mw.config in JavaScript.
2796          *
2797          * @param $key {String|Array} Key or array of key/value pars.
2798          * @param $value {Mixed} [optional] Value of the configuration variable.
2799          */
2800         public function addJsConfigVars( $keys, $value = null ) {
2801                 if ( is_array( $keys ) ) {
2802                         foreach ( $keys as $key => $value ) {
2803                                 $this->mJsConfigVars[$key] = $value;
2804                         }
2805                         return;
2806                 }
2807
2808                 $this->mJsConfigVars[$keys] = $value;
2809         }
2810
2811
2812         /**
2813          * Get an array containing the variables to be set in mw.config in JavaScript.
2814          *
2815          * DO NOT CALL THIS FROM OUTSIDE OF THIS CLASS OR Skin::makeGlobalVariablesScript().
2816          * This is only public until that function is removed. You have been warned.
2817          *
2818          * Do not add things here which can be evaluated in ResourceLoaderStartupScript
2819          * - in other words, page-independent/site-wide variables (without state).
2820          * You will only be adding bloat to the html page and causing page caches to
2821          * have to be purged on configuration changes.
2822          * @return array
2823          */
2824         public function getJSVars() {
2825                 global $wgUseAjax, $wgEnableMWSuggest;
2826
2827                 $title = $this->getTitle();
2828                 $ns = $title->getNamespace();
2829                 $nsname = MWNamespace::exists( $ns ) ? MWNamespace::getCanonicalName( $ns ) : $title->getNsText();
2830                 if ( $ns == NS_SPECIAL ) {
2831                         list( $canonicalName, /*...*/ ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
2832                 } else {
2833                         $canonicalName = false; # bug 21115
2834                 }
2835
2836                 $lang = $title->getPageLanguage();
2837
2838                 // Pre-process information
2839                 $separatorTransTable = $lang->separatorTransformTable();
2840                 $separatorTransTable = $separatorTransTable ? $separatorTransTable : array();
2841                 $compactSeparatorTransTable = array(
2842                         implode( "\t", array_keys( $separatorTransTable ) ),
2843                         implode( "\t", $separatorTransTable ),
2844                 );
2845                 $digitTransTable = $lang->digitTransformTable();
2846                 $digitTransTable = $digitTransTable ? $digitTransTable : array();
2847                 $compactDigitTransTable = array(
2848                         implode( "\t", array_keys( $digitTransTable ) ),
2849                         implode( "\t", $digitTransTable ),
2850                 );
2851
2852                 $vars = array(
2853                         'wgCanonicalNamespace' => $nsname,
2854                         'wgCanonicalSpecialPageName' => $canonicalName,
2855                         'wgNamespaceNumber' => $title->getNamespace(),
2856                         'wgPageName' => $title->getPrefixedDBKey(),
2857                         'wgTitle' => $title->getText(),
2858                         'wgCurRevisionId' => $title->getLatestRevID(),
2859                         'wgArticleId' => $title->getArticleId(),
2860                         'wgIsArticle' => $this->isArticle(),
2861                         'wgAction' => $this->getRequest()->getText( 'action', 'view' ),
2862                         'wgUserName' => $this->getUser()->isAnon() ? null : $this->getUser()->getName(),
2863                         'wgUserGroups' => $this->getUser()->getEffectiveGroups(),
2864                         'wgCategories' => $this->getCategories(),
2865                         'wgBreakFrames' => $this->getFrameOptions() == 'DENY',
2866                         'wgPageContentLanguage' => $lang->getCode(),
2867                         'wgSeparatorTransformTable' => $compactSeparatorTransTable,
2868                         'wgDigitTransformTable' => $compactDigitTransTable,
2869                 );
2870                 if ( $lang->hasVariants() ) {
2871                         $vars['wgUserVariant'] = $lang->getPreferredVariant();
2872                 }
2873                 foreach ( $title->getRestrictionTypes() as $type ) {
2874                         $vars['wgRestriction' . ucfirst( $type )] = $title->getRestrictions( $type );
2875                 }
2876                 if ( $wgUseAjax && $wgEnableMWSuggest && !$this->getUser()->getOption( 'disablesuggest', false ) ) {
2877                         $vars['wgSearchNamespaces'] = SearchEngine::userNamespaces( $this->getUser() );
2878                 }
2879                 if ( $title->isMainPage() ) {
2880                         $vars['wgIsMainPage'] = true;
2881                 }
2882                 if ( $this->mRedirectedFrom ) {
2883                         $vars['wgRedirectedFrom'] = $this->mRedirectedFrom->getPrefixedDBKey();
2884                 }
2885
2886                 // Allow extensions to add their custom variables to the mw.config map.
2887                 // Use the 'ResourceLoaderGetConfigVars' hook if the variable is not
2888                 // page-dependant but site-wide (without state).
2889                 // Alternatively, you may want to use OutputPage->addJsConfigVars() instead.
2890                 wfRunHooks( 'MakeGlobalVariablesScript', array( &$vars, $this ) );
2891
2892                 // Merge in variables from addJsConfigVars last
2893                 return array_merge( $vars, $this->mJsConfigVars );
2894         }
2895
2896         /**
2897          * To make it harder for someone to slip a user a fake
2898          * user-JavaScript or user-CSS preview, a random token
2899          * is associated with the login session. If it's not
2900          * passed back with the preview request, we won't render
2901          * the code.
2902          *
2903          * @return bool
2904          */
2905         public function userCanPreview() {
2906                 if ( $this->getRequest()->getVal( 'action' ) != 'submit'
2907                         || !$this->getRequest()->wasPosted()
2908                         || !$this->getUser()->matchEditToken(
2909                                 $this->getRequest()->getVal( 'wpEditToken' ) )
2910                 ) {
2911                         return false;
2912                 }
2913                 if ( !$this->getTitle()->isJsSubpage() && !$this->getTitle()->isCssSubpage() ) {
2914                         return false;
2915                 }
2916
2917                 return !count( $this->getTitle()->getUserPermissionsErrors( 'edit', $this->getUser() ) );
2918         }
2919
2920         /**
2921          * @param $unused Unused
2922          * @param $addContentType bool
2923          *
2924          * @return string HTML tag links to be put in the header.
2925          */
2926         public function getHeadLinks( $unused = null, $addContentType = false ) {
2927                 global $wgUniversalEditButton, $wgFavicon, $wgAppleTouchIcon, $wgEnableAPI,
2928                         $wgSitename, $wgVersion, $wgHtml5, $wgMimeType,
2929                         $wgFeed, $wgOverrideSiteFeed, $wgAdvertisedFeedTypes,
2930                         $wgDisableLangConversion, $wgCanonicalLanguageLinks,
2931                         $wgRightsPage, $wgRightsUrl;
2932
2933                 $tags = array();
2934
2935                 if ( $addContentType ) {
2936                         if ( $wgHtml5 ) {
2937                                 # More succinct than <meta http-equiv=Content-Type>, has the
2938                                 # same effect
2939                                 $tags[] = Html::element( 'meta', array( 'charset' => 'UTF-8' ) );
2940                         } else {
2941                                 $tags[] = Html::element( 'meta', array(
2942                                         'http-equiv' => 'Content-Type',
2943                                         'content' => "$wgMimeType; charset=UTF-8"
2944                                 ) );
2945                                 $tags[] = Html::element( 'meta', array(  // bug 15835
2946                                         'http-equiv' => 'Content-Style-Type',
2947                                         'content' => 'text/css'
2948                                 ) );
2949                         }
2950                 }
2951
2952                 $tags[] = Html::element( 'meta', array(
2953                         'name' => 'generator',
2954                         'content' => "MediaWiki $wgVersion",
2955                 ) );
2956
2957                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
2958                 if( $p !== 'index,follow' ) {
2959                         // http://www.robotstxt.org/wc/meta-user.html
2960                         // Only show if it's different from the default robots policy
2961                         $tags[] = Html::element( 'meta', array(
2962                                 'name' => 'robots',
2963                                 'content' => $p,
2964                         ) );
2965                 }
2966
2967                 if ( count( $this->mKeywords ) > 0 ) {
2968                         $strip = array(
2969                                 "/<.*?" . ">/" => '',
2970                                 "/_/" => ' '
2971                         );
2972                         $tags[] = Html::element( 'meta', array(
2973                                 'name' => 'keywords',
2974                                 'content' =>  preg_replace(
2975                                         array_keys( $strip ),
2976                                         array_values( $strip ),
2977                                         implode( ',', $this->mKeywords )
2978                                 )
2979                         ) );
2980                 }
2981
2982                 foreach ( $this->mMetatags as $tag ) {
2983                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
2984                                 $a = 'http-equiv';
2985                                 $tag[0] = substr( $tag[0], 5 );
2986                         } else {
2987                                 $a = 'name';
2988                         }
2989                         $tags[] = Html::element( 'meta',
2990                                 array(
2991                                         $a => $tag[0],
2992                                         'content' => $tag[1]
2993                                 )
2994                         );
2995                 }
2996
2997                 foreach ( $this->mLinktags as $tag ) {
2998                         $tags[] = Html::element( 'link', $tag );
2999                 }
3000
3001                 # Universal edit button
3002                 if ( $wgUniversalEditButton && $this->isArticleRelated() ) {
3003                         $user = $this->getUser();
3004                         if ( $this->getTitle()->quickUserCan( 'edit', $user )
3005                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create', $user ) ) ) {
3006                                 // Original UniversalEditButton
3007                                 $msg = $this->msg( 'edit' )->text();
3008                                 $tags[] = Html::element( 'link', array(
3009                                         'rel' => 'alternate',
3010                                         'type' => 'application/x-wiki',
3011                                         'title' => $msg,
3012                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
3013                                 ) );
3014                                 // Alternate edit link
3015                                 $tags[] = Html::element( 'link', array(
3016                                         'rel' => 'edit',
3017                                         'title' => $msg,
3018                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
3019                                 ) );
3020                         }
3021                 }
3022
3023                 # Generally the order of the favicon and apple-touch-icon links
3024                 # should not matter, but Konqueror (3.5.9 at least) incorrectly
3025                 # uses whichever one appears later in the HTML source. Make sure
3026                 # apple-touch-icon is specified first to avoid this.
3027                 if ( $wgAppleTouchIcon !== false ) {
3028                         $tags[] = Html::element( 'link', array( 'rel' => 'apple-touch-icon', 'href' => $wgAppleTouchIcon ) );
3029                 }
3030
3031                 if ( $wgFavicon !== false ) {
3032                         $tags[] = Html::element( 'link', array( 'rel' => 'shortcut icon', 'href' => $wgFavicon ) );
3033                 }
3034
3035                 # OpenSearch description link
3036                 $tags[] = Html::element( 'link', array(
3037                         'rel' => 'search',
3038                         'type' => 'application/opensearchdescription+xml',
3039                         'href' => wfScript( 'opensearch_desc' ),
3040                         'title' => $this->msg( 'opensearch-desc' )->inContentLanguage()->text(),
3041                 ) );
3042
3043                 if ( $wgEnableAPI ) {
3044                         # Real Simple Discovery link, provides auto-discovery information
3045                         # for the MediaWiki API (and potentially additional custom API
3046                         # support such as WordPress or Twitter-compatible APIs for a
3047                         # blogging extension, etc)
3048                         $tags[] = Html::element( 'link', array(
3049                                 'rel' => 'EditURI',
3050                                 'type' => 'application/rsd+xml',
3051                                 // Output a protocol-relative URL here if $wgServer is protocol-relative
3052                                 // Whether RSD accepts relative or protocol-relative URLs is completely undocumented, though
3053                                 'href' => wfExpandUrl( wfAppendQuery( wfScript( 'api' ), array( 'action' => 'rsd' ) ), PROTO_RELATIVE ),
3054                         ) );
3055                 }
3056
3057
3058                 # Language variants
3059                 if ( !$wgDisableLangConversion && $wgCanonicalLanguageLinks ) {
3060                         $lang = $this->getTitle()->getPageLanguage();
3061                         if ( $lang->hasVariants() ) {
3062
3063                                 $urlvar = $lang->getURLVariant();
3064
3065                                 if ( !$urlvar ) {
3066                                         $variants = $lang->getVariants();
3067                                         foreach ( $variants as $_v ) {
3068                                                 $tags[] = Html::element( 'link', array(
3069                                                         'rel' => 'alternate',
3070                                                         'hreflang' => $_v,
3071                                                         'href' => $this->getTitle()->getLocalURL( array( 'variant' => $_v ) ) )
3072                                                 );
3073                                         }
3074                                 } else {
3075                                         $tags[] = Html::element( 'link', array(
3076                                                 'rel' => 'canonical',
3077                                                 'href' => $this->getTitle()->getCanonicalUrl()
3078                                         ) );
3079                                 }
3080                         }
3081                 }
3082
3083                 # Copyright
3084                 $copyright = '';
3085                 if ( $wgRightsPage ) {
3086                         $copy = Title::newFromText( $wgRightsPage );
3087
3088                         if ( $copy ) {
3089                                 $copyright = $copy->getLocalURL();
3090                         }
3091                 }
3092
3093                 if ( !$copyright && $wgRightsUrl ) {
3094                         $copyright = $wgRightsUrl;
3095                 }
3096
3097                 if ( $copyright ) {
3098                         $tags[] = Html::element( 'link', array(
3099                                 'rel' => 'copyright',
3100                                 'href' => $copyright )
3101                         );
3102                 }
3103
3104                 # Feeds
3105                 if ( $wgFeed ) {
3106                         foreach( $this->getSyndicationLinks() as $format => $link ) {
3107                                 # Use the page name for the title.  In principle, this could
3108                                 # lead to issues with having the same name for different feeds
3109                                 # corresponding to the same page, but we can't avoid that at
3110                                 # this low a level.
3111
3112                                 $tags[] = $this->feedLink(
3113                                         $format,
3114                                         $link,
3115                                         # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
3116                                         $this->msg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() )->text()
3117                                 );
3118                         }
3119
3120                         # Recent changes feed should appear on every page (except recentchanges,
3121                         # that would be redundant). Put it after the per-page feed to avoid
3122                         # changing existing behavior. It's still available, probably via a
3123                         # menu in your browser. Some sites might have a different feed they'd
3124                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
3125                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
3126                         # If so, use it instead.
3127                         if ( $wgOverrideSiteFeed ) {
3128                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
3129                                         // Note, this->feedLink escapes the url.
3130                                         $tags[] = $this->feedLink(
3131                                                 $type,
3132                                                 $feedUrl,
3133                                                 $this->msg( "site-{$type}-feed", $wgSitename )->text()
3134                                         );
3135                                 }
3136                         } elseif ( !$this->getTitle()->isSpecial( 'Recentchanges' ) ) {
3137                                 $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
3138                                 foreach ( $wgAdvertisedFeedTypes as $format ) {
3139                                         $tags[] = $this->feedLink(
3140                                                 $format,
3141                                                 $rctitle->getLocalURL( "feed={$format}" ),
3142                                                 $this->msg( "site-{$format}-feed", $wgSitename )->text() # For grep: 'site-rss-feed', 'site-atom-feed'.
3143                                         );
3144                                 }
3145                         }
3146                 }
3147                 return implode( "\n", $tags );
3148         }
3149
3150         /**
3151          * Generate a <link rel/> for a feed.
3152          *
3153          * @param $type String: feed type
3154          * @param $url String: URL to the feed
3155          * @param $text String: value of the "title" attribute
3156          * @return String: HTML fragment
3157          */
3158         private function feedLink( $type, $url, $text ) {
3159                 return Html::element( 'link', array(
3160                         'rel' => 'alternate',
3161                         'type' => "application/$type+xml",
3162                         'title' => $text,
3163                         'href' => $url )
3164                 );
3165         }
3166
3167         /**
3168          * Add a local or specified stylesheet, with the given media options.
3169          * Meant primarily for internal use...
3170          *
3171          * @param $style String: URL to the file
3172          * @param $media String: to specify a media type, 'screen', 'printable', 'handheld' or any.
3173          * @param $condition String: for IE conditional comments, specifying an IE version
3174          * @param $dir String: set to 'rtl' or 'ltr' for direction-specific sheets
3175          */
3176         public function addStyle( $style, $media = '', $condition = '', $dir = '' ) {
3177                 $options = array();
3178                 // Even though we expect the media type to be lowercase, but here we
3179                 // force it to lowercase to be safe.
3180                 if( $media ) {
3181                         $options['media'] = $media;
3182                 }
3183                 if( $condition ) {
3184                         $options['condition'] = $condition;
3185                 }
3186                 if( $dir ) {
3187                         $options['dir'] = $dir;
3188                 }
3189                 $this->styles[$style] = $options;
3190         }
3191
3192         /**
3193          * Adds inline CSS styles
3194          * @param $style_css Mixed: inline CSS
3195          * @param $flip String: Set to 'flip' to flip the CSS if needed
3196          */
3197         public function addInlineStyle( $style_css, $flip = 'noflip' ) {
3198                 if( $flip === 'flip' && $this->getLanguage()->isRTL() ) {
3199                         # If wanted, and the interface is right-to-left, flip the CSS
3200                         $style_css = CSSJanus::transform( $style_css, true, false );
3201                 }
3202                 $this->mInlineStyles .= Html::inlineStyle( $style_css );
3203         }
3204
3205         /**
3206          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
3207          * These will be applied to various media & IE conditionals.
3208          *
3209          * @return string
3210          */
3211         public function buildCssLinks() {
3212                 global $wgUseSiteCss, $wgAllowUserCss, $wgAllowUserCssPrefs,
3213                         $wgLang, $wgContLang;
3214
3215                 $this->getSkin()->setupSkinUserCss( $this );
3216
3217                 // Add ResourceLoader styles
3218                 // Split the styles into four groups
3219                 $styles = array( 'other' => array(), 'user' => array(), 'site' => array(), 'private' => array(), 'noscript' => array() );
3220                 $otherTags = ''; // Tags to append after the normal <link> tags
3221                 $resourceLoader = $this->getResourceLoader();
3222
3223                 $moduleStyles = $this->getModuleStyles();
3224
3225                 // Per-site custom styles
3226                 if ( $wgUseSiteCss ) {
3227                         $moduleStyles[] = 'site';
3228                         $moduleStyles[] = 'noscript';
3229                         if( $this->getUser()->isLoggedIn() ){
3230                                 $moduleStyles[] = 'user.groups';
3231                         }
3232                 }
3233
3234                 // Per-user custom styles
3235                 if ( $wgAllowUserCss ) {
3236                         if ( $this->getTitle()->isCssSubpage() && $this->userCanPreview() ) {
3237                                 // We're on a preview of a CSS subpage
3238                                 // Exclude this page from the user module in case it's in there (bug 26283)
3239                                 $otherTags .= $this->makeResourceLoaderLink( 'user', ResourceLoaderModule::TYPE_STYLES, false,
3240                                         array( 'excludepage' => $this->getTitle()->getPrefixedDBkey() )
3241                                 );
3242
3243                                 // Load the previewed CSS
3244                                 // If needed, Janus it first. This is user-supplied CSS, so it's
3245                                 // assumed to be right for the content language directionality.
3246                                 $previewedCSS = $this->getRequest()->getText( 'wpTextbox1' );
3247                                 if ( $wgLang->getDir() !== $wgContLang->getDir() ) {
3248                                         $previewedCSS = CSSJanus::transform( $previewedCSS, true, false );
3249                                 }
3250                                 $otherTags .= Html::inlineStyle( $previewedCSS );
3251                         } else {
3252                                 // Load the user styles normally
3253                                 $moduleStyles[] = 'user';
3254                         }
3255                 }
3256
3257                 // Per-user preference styles
3258                 if ( $wgAllowUserCssPrefs ) {
3259                         $moduleStyles[] = 'user.options';
3260                 }
3261
3262                 foreach ( $moduleStyles as $name ) {
3263                         $module = $resourceLoader->getModule( $name );
3264                         if ( !$module ) {
3265                                 continue;
3266                         }
3267                         $group = $module->getGroup();
3268                         // Modules in groups named "other" or anything different than "user", "site" or "private"
3269                         // will be placed in the "other" group
3270                         $styles[isset( $styles[$group] ) ? $group : 'other'][] = $name;
3271                 }
3272
3273                 // We want site, private and user styles to override dynamically added styles from modules, but we want
3274                 // dynamically added styles to override statically added styles from other modules. So the order
3275                 // has to be other, dynamic, site, private, user
3276                 // Add statically added styles for other modules
3277                 $ret = $this->makeResourceLoaderLink( $styles['other'], ResourceLoaderModule::TYPE_STYLES );
3278                 // Add normal styles added through addStyle()/addInlineStyle() here
3279                 $ret .= implode( "\n", $this->buildCssLinksArray() ) . $this->mInlineStyles;
3280                 // Add marker tag to mark the place where the client-side loader should inject dynamic styles
3281                 // We use a <meta> tag with a made-up name for this because that's valid HTML
3282                 $ret .= Html::element( 'meta', array( 'name' => 'ResourceLoaderDynamicStyles', 'content' => '' ) ) . "\n";
3283
3284                 // Add site, private and user styles
3285                 // 'private' at present only contains user.options, so put that before 'user'
3286                 // Any future private modules will likely have a similar user-specific character
3287                 foreach ( array( 'site', 'noscript', 'private', 'user' ) as $group ) {
3288                         $ret .= $this->makeResourceLoaderLink( $styles[$group],
3289                                         ResourceLoaderModule::TYPE_STYLES
3290                         );
3291                 }
3292
3293                 // Add stuff in $otherTags (previewed user CSS if applicable)
3294                 $ret .= $otherTags;
3295                 return $ret;
3296         }
3297
3298         /**
3299          * @return Array
3300          */
3301         public function buildCssLinksArray() {
3302                 $links = array();
3303
3304                 // Add any extension CSS
3305                 foreach ( $this->mExtStyles as $url ) {
3306                         $this->addStyle( $url );
3307                 }
3308                 $this->mExtStyles = array();
3309
3310                 foreach( $this->styles as $file => $options ) {
3311                         $link = $this->styleLink( $file, $options );
3312                         if( $link ) {
3313                                 $links[$file] = $link;
3314                         }
3315                 }
3316                 return $links;
3317         }
3318
3319         /**
3320          * Generate \<link\> tags for stylesheets
3321          *
3322          * @param $style String: URL to the file
3323          * @param $options Array: option, can contain 'condition', 'dir', 'media'
3324          *                 keys
3325          * @return String: HTML fragment
3326          */
3327         protected function styleLink( $style, $options ) {
3328                 if( isset( $options['dir'] ) ) {
3329                         if( $this->getLanguage()->getDir() != $options['dir'] ) {
3330                                 return '';
3331                         }
3332                 }
3333
3334                 if( isset( $options['media'] ) ) {
3335                         $media = self::transformCssMedia( $options['media'] );
3336                         if( is_null( $media ) ) {
3337                                 return '';
3338                         }
3339                 } else {
3340                         $media = 'all';
3341                 }
3342
3343                 if( substr( $style, 0, 1 ) == '/' ||
3344                         substr( $style, 0, 5 ) == 'http:' ||
3345                         substr( $style, 0, 6 ) == 'https:' ) {
3346                         $url = $style;
3347                 } else {
3348                         global $wgStylePath, $wgStyleVersion;
3349                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
3350                 }
3351
3352                 $link = Html::linkedStyle( $url, $media );
3353
3354                 if( isset( $options['condition'] ) ) {
3355                         $condition = htmlspecialchars( $options['condition'] );
3356                         $link = "<!--[if $condition]>$link<![endif]-->";
3357                 }
3358                 return $link;
3359         }
3360
3361         /**
3362          * Transform "media" attribute based on request parameters
3363          *
3364          * @param $media String: current value of the "media" attribute
3365          * @return String: modified value of the "media" attribute
3366          */
3367         public static function transformCssMedia( $media ) {
3368                 global $wgRequest, $wgHandheldForIPhone;
3369
3370                 // Switch in on-screen display for media testing
3371                 $switches = array(
3372                         'printable' => 'print',
3373                         'handheld' => 'handheld',
3374                 );
3375                 foreach( $switches as $switch => $targetMedia ) {
3376                         if( $wgRequest->getBool( $switch ) ) {
3377                                 if( $media == $targetMedia ) {
3378                                         $media = '';
3379                                 } elseif( $media == 'screen' ) {
3380                                         return null;
3381                                 }
3382                         }
3383                 }
3384
3385                 // Expand longer media queries as iPhone doesn't grok 'handheld'
3386                 if( $wgHandheldForIPhone ) {
3387                         $mediaAliases = array(
3388                                 'screen' => 'screen and (min-device-width: 481px)',
3389                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
3390                         );
3391
3392                         if( isset( $mediaAliases[$media] ) ) {
3393                                 $media = $mediaAliases[$media];
3394                         }
3395                 }
3396
3397                 return $media;
3398         }
3399
3400         /**
3401          * Add a wikitext-formatted message to the output.
3402          * This is equivalent to:
3403          *
3404          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
3405          */
3406         public function addWikiMsg( /*...*/ ) {
3407                 $args = func_get_args();
3408                 $name = array_shift( $args );
3409                 $this->addWikiMsgArray( $name, $args );
3410         }
3411
3412         /**
3413          * Add a wikitext-formatted message to the output.
3414          * Like addWikiMsg() except the parameters are taken as an array
3415          * instead of a variable argument list.
3416          *
3417          * @param $name string
3418          * @param $args array
3419          */
3420         public function addWikiMsgArray( $name, $args ) {
3421                 $this->addWikiText( $this->msg( $name, $args )->plain() );
3422         }
3423
3424         /**
3425          * This function takes a number of message/argument specifications, wraps them in
3426          * some overall structure, and then parses the result and adds it to the output.
3427          *
3428          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
3429          * on. The subsequent arguments may either be strings, in which case they are the
3430          * message names, or arrays, in which case the first element is the message name,
3431          * and subsequent elements are the parameters to that message.
3432          *
3433          * The special named parameter 'options' in a message specification array is passed
3434          * through to the $options parameter of wfMsgExt().
3435          *
3436          * Don't use this for messages that are not in users interface language.
3437          *
3438          * For example:
3439          *
3440          *    $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>", 'some-error' );
3441          *
3442          * Is equivalent to:
3443          *
3444          *    $wgOut->addWikiText( "<div class='error'>\n" . wfMsgNoTrans( 'some-error' ) . "\n</div>" );
3445          *
3446          * The newline after opening div is needed in some wikitext. See bug 19226.
3447          *
3448          * @param $wrap string
3449          */
3450         public function wrapWikiMsg( $wrap /*, ...*/ ) {
3451                 $msgSpecs = func_get_args();
3452                 array_shift( $msgSpecs );
3453                 $msgSpecs = array_values( $msgSpecs );
3454                 $s = $wrap;
3455                 foreach ( $msgSpecs as $n => $spec ) {
3456                         $options = array();
3457                         if ( is_array( $spec ) ) {
3458                                 $args = $spec;
3459                                 $name = array_shift( $args );
3460                                 if ( isset( $args['options'] ) ) {
3461                                         $options = $args['options'];
3462                                         unset( $args['options'] );
3463                                 }
3464                         }  else {
3465                                 $args = array();
3466                                 $name = $spec;
3467                         }
3468                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
3469                 }
3470                 $this->addWikiText( $s );
3471         }
3472
3473         /**
3474          * Include jQuery core. Use this to avoid loading it multiple times
3475          * before we get a usable script loader.
3476          *
3477          * @param $modules Array: list of jQuery modules which should be loaded
3478          * @return Array: the list of modules which were not loaded.
3479          * @since 1.16
3480          * @deprecated since 1.17
3481          */
3482         public function includeJQuery( $modules = array() ) {
3483                 return array();
3484         }
3485
3486 }