Made loadFromFileCache() always disable $wgOut regardless of whether compression...
[lhc/web/wiklou.git] / includes / OutputPage.php
index 67a634d..9723690 100644 (file)
@@ -10,15 +10,15 @@ if ( !defined( 'MEDIAWIKI' ) ) {
  *
  * This class is used to prepare the final rendering. A skin is then
  * applied to the output parameters (links, javascript, html, categories ...).
- * 
- * Another class (fixme) handles sending the whole page to the client.
- * 
- * Some comments comes from a pairing session between Zak Greant and Ashar Voultoiz
+ *
+ * @todo FIXME: Another class handles sending the whole page to the client.
+ *
+ * Some comments comes from a pairing session between Zak Greant and Antoine Musso
  * in November 2010.
  *
  * @todo document
  */
-class OutputPage {
+class OutputPage extends ContextSource {
        /// Should be private. Used with addMeta() which adds <meta>
        var $mMetatags = array();
 
@@ -47,7 +47,13 @@ class OutputPage {
        var $mHTMLtitle = '';
 
        /// Should be private. Is the displayed content related to the source of the corresponding wiki article.
-       var $mIsarticle = true;
+       var $mIsarticle = false;
+
+       /**
+        * Should be private. Has get/set methods properly documented.
+        * Stores "article flag" toggle.
+        */
+       var $mIsArticleRelated = true;
 
        /**
         * Should be private. We have to set isPrintable(). Some pages should
@@ -61,7 +67,7 @@ class OutputPage {
         * Contains the page subtitle. Special pages usually have some links here.
         * Don't confuse with site subtitle added by skins.
         */
-       var $mSubtitle = '';
+       private $mSubtitle = array();
 
        var $mRedirect = '';
        var $mStatusCode;
@@ -79,7 +85,7 @@ class OutputPage {
         * to compare its cached version with the server version. Client sends
         * headers If-Match and If-None-Match containing its locally cached ETAG value.
         *
-        * To get more information, you will have to look at HTTP1/1 protocols which
+        * To get more information, you will have to look at HTTP/1.1 protocol which
         * is properly described in RFC 2616 : http://tools.ietf.org/html/rfc2616
         */
        var $mETag = false;
@@ -115,16 +121,21 @@ class OutputPage {
        /// Array of elements in <head>. Parser might add its own headers!
        var $mHeadItems = array();
 
-       // Next variables probably comes from the resource loader @todo FIXME
+       // @todo FIXME: Next variables probably comes from the resource loader
        var $mModules = array(), $mModuleScripts = array(), $mModuleStyles = array(), $mModuleMessages = array();
        var $mResourceLoader;
+       var $mJsConfigVars = array();
 
-       /** @fixme is this still used ?*/
+       /** @todo FIXME: Is this still used ?*/
        var $mInlineMsg = array();
 
        var $mTemplateIds = array();
        var $mImageTimeKeys = array();
 
+       var $mRedirectCode = '';
+
+       var $mFeedLinksAppendQuery = null;
+
        # What level of 'untrustworthiness' is allowed in CSS/JS modules loaded on this page?
        # @see ResourceLoaderModule::$origin
        # ResourceLoaderModule::ORIGIN_ALL is assumed unless overridden;
@@ -142,12 +153,9 @@ class OutputPage {
        var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
 
        /**
-        * Should be private. Has get/set methods properly documented.
-        * Stores "article flag" toggle.
+        * lazy initialised, use parserOptions()
+        * @var ParserOptions
         */
-       var $mIsArticleRelated = true;
-
-       /// lazy initialised, use parserOptions()
        protected $mParserOptions = null;
 
        /**
@@ -189,8 +197,9 @@ class OutputPage {
 
        /// should be private. To include the variable {{REVISIONID}}
        var $mRevisionId = null;
+       private $mRevisionTimestamp = null;
 
-       private $mContext;
+       var $mFileVersion = null;
 
        /**
         * An array of stylesheet filenames (relative from skins path), with options
@@ -214,17 +223,26 @@ class OutputPage {
                'Cookie' => null
        );
 
+       /**
+        * If the current page was reached through a redirect, $mRedirectedFrom contains the Title
+        * of the redirect.
+        *
+        * @var Title
+        */
+       private $mRedirectedFrom = null;
+
        /**
         * Constructor for OutputPage. This should not be called directly.
         * Instead a new RequestContext should be created and it will implicitly create
         * a OutputPage tied to that context.
         */
-       function __construct( RequestContext $context = null ) {
-               if ( !isset($context) ) {
+       function __construct( IContextSource $context = null ) {
+               if ( $context === null ) {
                        # Extensions should use `new RequestContext` instead of `new OutputPage` now.
                        wfDeprecated( __METHOD__ );
+               } else {
+                       $this->setContext( $context );
                }
-               $this->mContext = $context;
        }
 
        /**
@@ -307,7 +325,7 @@ class OutputPage {
         *
         * @return String
         */
-       private function getMetadataAttribute() {
+       public function getMetadataAttribute() {
                # note: buggy CC software only reads first "meta" link
                static $haveMeta = false;
                if ( $haveMeta ) {
@@ -391,6 +409,7 @@ class OutputPage {
         * which are no longer registered (eg a page is cached before an extension is disabled)
         * @param $modules Array
         * @param $position String if not null, only return modules with this position
+        * @param $type string
         * @return Array
         */
        protected function filterModules( $modules, $position = null, $type = ResourceLoaderModule::TYPE_COMBINED ){
@@ -413,6 +432,7 @@ class OutputPage {
         *
         * @param $filter Bool whether to filter out insufficiently trustworthy modules
         * @param $position String if not null, only return modules with this position
+        * @param $param string
         * @return Array of module names
         */
        public function getModules( $filter = false, $position = null, $param = 'mModules' ) {
@@ -435,6 +455,10 @@ class OutputPage {
 
        /**
         * Get the list of module JS to include on this page
+        *
+        * @param $filter
+        * @param $position
+        *
         * @return array of module names
         */
        public function getModuleScripts( $filter = false, $position = null ) {
@@ -455,6 +479,9 @@ class OutputPage {
        /**
         * Get the list of module CSS to include on this page
         *
+        * @param $filter
+        * @param $position
+        *
         * @return Array of module names
         */
        public function getModuleStyles( $filter = false, $position = null ) {
@@ -475,6 +502,9 @@ class OutputPage {
        /**
         * Get the list of module messages to include on this page
         *
+        * @param $filter
+        * @param $position
+        *
         * @return Array of module names
         */
        public function getModuleMessages( $filter = false, $position = null ) {
@@ -492,6 +522,15 @@ class OutputPage {
                $this->mModuleMessages = array_merge( $this->mModuleMessages, (array)$modules );
        }
 
+       /**
+        * Get an array of head items
+        *
+        * @return Array
+        */
+       function getHeadItemsArray() {
+               return $this->mHeadItems;
+       }
+
        /**
         * Get all header items in a string
         *
@@ -561,6 +600,8 @@ class OutputPage {
         *
         * Side effect: sets mLastModified for Last-Modified header
         *
+        * @param $timestamp string
+        *
         * @return Boolean: true iff cache-ok headers was sent.
         */
        public function checkLastModified( $timestamp ) {
@@ -724,9 +765,15 @@ class OutputPage {
        /**
         * "HTML title" means the contents of <title>.
         * It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
+        *
+        * @param $name string
         */
        public function setHTMLTitle( $name ) {
-               $this->mHTMLtitle = $name;
+               if ( $name instanceof Message ) {
+                       $this->mHTMLtitle = $name->setContext( $this->getContext() )->text();
+               } else {
+                       $this->mHTMLtitle = $name;
+               }
        }
 
        /**
@@ -738,20 +785,35 @@ class OutputPage {
                return $this->mHTMLtitle;
        }
 
+       /**
+        * Set $mRedirectedFrom, the Title of the page which redirected us to the current page.
+        *
+        * param @t Title
+        */
+       public function setRedirectedFrom( $t ) {
+               $this->mRedirectedFrom = $t;
+       }
+
        /**
         * "Page title" means the contents of \<h1\>. It is stored as a valid HTML fragment.
         * This function allows good tags like \<sup\> in the \<h1\> tag, but not bad tags like \<script\>.
         * This function automatically sets \<title\> to the same content as \<h1\> but with all tags removed.
         * Bad tags that were escaped in \<h1\> will still be escaped in \<title\>, and good tags like \<i\> will be dropped entirely.
+        *
+        * @param $name string|Message
         */
        public function setPageTitle( $name ) {
+               if ( $name instanceof Message ) {
+                       $name = $name->setContext( $this->getContext() )->text();
+               }
+
                # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
                # but leave "<i>foobar</i>" alone
                $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
                $this->mPagetitle = $nameWithTags;
 
                # change "<i>foo&amp;bar</i>" to "foo&bar"
-               $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
+               $this->setHTMLTitle( $this->msg( 'pagetitle' )->rawParams( Sanitizer::stripAllTags( $nameWithTags ) ) );
        }
 
        /**
@@ -763,83 +825,67 @@ class OutputPage {
                return $this->mPagetitle;
        }
 
-       /**
-        * Get the RequestContext used in this instance
-        *
-        * @return RequestContext
-        */
-       private function getContext() {
-               if ( !isset($this->mContext) ) {
-                       wfDebug( __METHOD__ . " called and \$mContext is null. Using RequestContext::getMain(); for sanity\n" );
-                       $this->mContext = RequestContext::getMain();
-               }
-               return $this->mContext;
-       }
-
-       /**
-        * Get the WebRequest being used for this instance
-        *
-        * @return WebRequest
-        * @since 1.18
-        */
-       public function getRequest() {
-               return $this->getContext()->getRequest();
-       }
-
        /**
         * Set the Title object to use
         *
         * @param $t Title object
         */
-       public function setTitle( $t ) {
+       public function setTitle( Title $t ) {
                $this->getContext()->setTitle( $t );
        }
 
+
        /**
-        * Get the Title object used in this instance
+        * Replace the subtile with $str
         *
-        * @return Title
+        * @param $str String|Message: new value of the subtitle
         */
-       public function getTitle() {
-               return $this->getContext()->getTitle();
+       public function setSubtitle( $str ) {
+               $this->clearSubtitle();
+               $this->addSubtitle( $str );
        }
 
        /**
-        * Get the User object used in this instance
+        * Add $str to the subtitle
         *
-        * @return User
-        * @since 1.18
+        * @deprecated in 1.19; use addSubtitle() instead
+        * @param $str String|Message to add to the subtitle
         */
-       public function getUser() {
-               return $this->getContext()->getUser();
+       public function appendSubtitle( $str ) {
+               $this->addSubtitle( $str );
        }
 
        /**
-        * Get the Skin object used to render this instance
+        * Add $str to the subtitle
         *
-        * @return Skin
-        * @since 1.18
+        * @param $str String|Message to add to the subtitle
         */
-       public function getSkin() {
-               return $this->getContext()->getSkin();
+       public function addSubtitle( $str ) {
+               if ( $str instanceof Message ) {
+                       $this->mSubtitle[] = $str->setContext( $this->getContext() )->parse();
+               } else {
+                       $this->mSubtitle[] = $str;
+               }
        }
 
        /**
-        * Replace the subtile with $str
+        * Add a subtitle containing a backlink to a page
         *
-        * @param $str String: new value of the subtitle
+        * @param $title Title to link to
         */
-       public function setSubtitle( $str ) {
-               $this->mSubtitle = /*$this->parse(*/ $str /*)*/; // @bug 2514
+       public function addBacklinkSubtitle( Title $title ) {
+               $query = array();
+               if ( $title->isRedirect() ) {
+                       $query['redirect'] = 'no';
+               }
+               $this->addSubtitle( $this->msg( 'backlinksubtitle' )->rawParams( Linker::link( $title, null, array(), $query ) ) );
        }
 
        /**
-        * Add $str to the subtitle
-        *
-        * @param $str String to add to the subtitle
+        * Clear the subtitles
         */
-       public function appendSubtitle( $str ) {
-               $this->mSubtitle .= /*$this->parse(*/ $str /*)*/; // @bug 2514
+       public function clearSubtitle() {
+               $this->mSubtitle = array();
        }
 
        /**
@@ -848,7 +894,7 @@ class OutputPage {
         * @return String
         */
        public function getSubtitle() {
-               return $this->mSubtitle;
+               return implode( "<br />\n\t\t\t\t", $this->mSubtitle );
        }
 
        /**
@@ -1029,7 +1075,7 @@ class OutputPage {
        /**
         * Add new language links
         *
-        * @param $newLinkArray Associative array mapping language code to the page
+        * @param $newLinkArray array Associative array mapping language code to the page
         *                      name
         */
        public function addLanguageLinks( $newLinkArray ) {
@@ -1039,7 +1085,7 @@ class OutputPage {
        /**
         * Reset the language links and add new language links
         *
-        * @param $newLinkArray Associative array mapping language code to the page
+        * @param $newLinkArray array Associative array mapping language code to the page
         *                      name
         */
        public function setLanguageLinks( $newLinkArray ) {
@@ -1111,7 +1157,7 @@ class OutputPage {
                                }
                                $text = $wgContLang->convertHtml( $title->getText() );
                                $this->mCategories[] = $title->getText();
-                               $this->mCategoryLinks[$type][] = $this->getSkin()->link( $title, $text );
+                               $this->mCategoryLinks[$type][] = Linker::link( $title, $text );
                        }
                }
        }
@@ -1161,10 +1207,12 @@ class OutputPage {
        /**
         * Return whether user JavaScript is allowed for this page
         * @deprecated since 1.18 Load modules with ResourceLoader, and origin and
-        *     trustworthiness is identified and enforced automagically. 
+        *     trustworthiness is identified and enforced automagically.
+        *     Will be removed in 1.20.
         * @return Boolean
         */
        public function isUserJsAllowed() {
+               wfDeprecated( __METHOD__, '1.18' );
                return $this->getAllowedModules( ResourceLoaderModule::TYPE_SCRIPTS ) >= ResourceLoaderModule::ORIGIN_USER_INDIVIDUAL;
        }
 
@@ -1220,6 +1268,19 @@ class OutputPage {
                $this->mBodytext .= $text;
        }
 
+       /**
+        * Shortcut for adding an Html::element via addHTML.
+        *
+        * @since 1.19
+        *
+        * @param $element string
+        * @param $attribs array
+        * @param $contents string
+        */
+       public function addElement( $element, $attribs = array(), $contents = '' ) {
+               $this->addHTML( Html::element( $element, $attribs, $contents ) );
+       }
+
        /**
         * Clear the body HTML
         */
@@ -1254,7 +1315,8 @@ class OutputPage {
         */
        public function parserOptions( $options = null ) {
                if ( !$this->mParserOptions ) {
-                       $this->mParserOptions = new ParserOptions;
+                       $this->mParserOptions = ParserOptions::newFromContext( $this->getContext() );
+                       $this->mParserOptions->setEditSection( false );
                }
                return wfSetVar( $this->mParserOptions, $options );
        }
@@ -1272,7 +1334,7 @@ class OutputPage {
        }
 
        /**
-        * Get the current revision ID
+        * Get the displayed revision ID
         *
         * @return Integer
         */
@@ -1280,6 +1342,50 @@ class OutputPage {
                return $this->mRevisionId;
        }
 
+       /**
+        * Set the timestamp of the revision which will be displayed. This is used
+        * to avoid a extra DB call in Skin::lastModified().
+        *
+        * @param $revid Mixed: string, or null
+        * @return Mixed: previous value
+        */
+       public function setRevisionTimestamp( $timestmap ) {
+               return wfSetVar( $this->mRevisionTimestamp, $timestmap );
+       }
+
+       /**
+        * Get the timestamp of displayed revision.
+        * This will be null if not filled by setRevisionTimestamp().
+        *
+        * @return String or null
+        */
+       public function getRevisionTimestamp() {
+               return $this->mRevisionTimestamp;
+       }
+
+       /**
+        * Set the displayed file version
+        *
+        * @param $file File|bool
+        * @return Mixed: previous value
+        */
+       public function setFileVersion( $file ) {
+               $val = null;
+               if ( $file instanceof File && $file->exists() ) {
+                       $val = array( 'time' => $file->getTimestamp(), 'sha1' => $file->getSha1() );
+               }
+               return wfSetVar( $this->mFileVersion, $val, true );
+       }
+
+       /**
+        * Get the displayed file version
+        *
+        * @return Array|null ('time' => MW timestamp, 'sha1' => sha1)
+        */
+       public function getFileVersion() {
+               return $this->mFileVersion;
+       }
+
        /**
         * Get the templates used on this page
         *
@@ -1296,7 +1402,7 @@ class OutputPage {
         * @return Array (dbKey => array('time' => MW timestamp or null, 'sha1' => sha1 or ''))
         * @since 1.18
         */
-       public function getImageTimeKeys() {
+       public function getFileSearchOptions() {
                return $this->mImageTimeKeys;
        }
 
@@ -1306,10 +1412,11 @@ class OutputPage {
         *
         * @param $text String
         * @param $linestart Boolean: is this the start of a line?
+        * @param $interface Boolean: is this text in the user interface language?
         */
-       public function addWikiText( $text, $linestart = true ) {
+       public function addWikiText( $text, $linestart = true, $interface = true ) {
                $title = $this->getTitle(); // Work arround E_STRICT
-               $this->addWikiTextTitle( $text, $title, $linestart );
+               $this->addWikiTextTitle( $text, $title, $linestart, /*tidy*/false, $interface );
        }
 
        /**
@@ -1324,7 +1431,7 @@ class OutputPage {
        }
 
        /**
-        * Add wikitext with a custom Title object and
+        * Add wikitext with a custom Title object and tidy enabled.
         *
         * @param $text String: wikitext
         * @param $title Title object
@@ -1352,16 +1459,17 @@ class OutputPage {
         * @param $title Title object
         * @param $linestart Boolean: is this the start of a line?
         * @param $tidy Boolean: whether to use tidy
+        * @param $interface Boolean: whether it is an interface message
+        *                                                              (for example disables conversion)
         */
-       public function addWikiTextTitle( $text, &$title, $linestart, $tidy = false ) {
+       public function addWikiTextTitle( $text, &$title, $linestart, $tidy = false, $interface = false ) {
                global $wgParser;
 
                wfProfileIn( __METHOD__ );
 
-               wfIncrStats( 'pcache_not_possible' );
-
                $popts = $this->parserOptions();
                $oldTidy = $popts->setTidy( $tidy );
+               $popts->setInterfaceMessage( (bool) $interface );
 
                $parserOutput = $wgParser->parse(
                        $text, $title, $popts,
@@ -1393,6 +1501,9 @@ class OutputPage {
                $this->mNoGallery = $parserOutput->getNoGallery();
                $this->mHeadItems = array_merge( $this->mHeadItems, $parserOutput->getHeadItems() );
                $this->addModules( $parserOutput->getModules() );
+               $this->addModuleScripts( $parserOutput->getModuleScripts() );
+               $this->addModuleStyles( $parserOutput->getModuleStyles() );
+               $this->addModuleMessages( $parserOutput->getModuleMessages() );
 
                // Template versioning...
                foreach ( (array)$parserOutput->getTemplateIds() as $ns => $dbks ) {
@@ -1403,7 +1514,7 @@ class OutputPage {
                        }
                }
                // File versioning...
-               foreach ( (array)$parserOutput->getImageTimeKeys() as $dbk => $data ) {
+               foreach ( (array)$parserOutput->getFileSearchOptions() as $dbk => $data ) {
                        $this->mImageTimeKeys[$dbk] = $data;
                }
 
@@ -1451,19 +1562,13 @@ class OutputPage {
         * @param $linestart Boolean: is this the start of a line?
         * @param $interface Boolean: use interface language ($wgLang instead of
         *                   $wgContLang) while parsing language sensitive magic
-        *                   words like GRAMMAR and PLURAL
+        *                   words like GRAMMAR and PLURAL. This also disables
+        *                                       LanguageConverter.
         * @param $language  Language object: target language object, will override
         *                   $interface
         * @return String: HTML
         */
        public function parse( $text, $linestart = true, $interface = false, $language = null ) {
-               // Check one for one common cause for parser state resetting
-               $callers = wfGetAllCallers( 10 );
-               if ( strpos( $callers, 'Parser::extensionSubstitution' ) !== false ) {
-                       throw new MWException( "wfMsg* function with parsing cannot be used " .
-                               "inside a tag hook. Should use parser->recursiveTagParse() instead" );
-               }
-
                global $wgParser;
 
                if( is_null( $this->getTitle() ) ) {
@@ -1526,7 +1631,9 @@ class OutputPage {
        /**
         * Use enableClientCache(false) to force it to send nocache headers
         *
-        * @param $state ??
+        * @param $state bool
+        *
+        * @return bool
         */
        public function enableClientCache( $state ) {
                return wfSetVar( $this->mEnableClientCache, $state );
@@ -1594,7 +1701,7 @@ class OutputPage {
         *
         * @param $header String: header name
         * @param $option Array|null
-        * @fixme Document the $option parameter; it appears to be for
+        * @todo FIXME: Document the $option parameter; it appears to be for
         *        X-Vary-Options but what format is acceptable?
         */
        public function addVaryHeader( $header, $option = null ) {
@@ -1607,7 +1714,7 @@ class OutputPage {
                                $this->mVaryHeader[$header] = $option;
                        }
                }
-               $this->mVaryHeader[$header] = array_unique( $this->mVaryHeader[$header] );
+               $this->mVaryHeader[$header] = array_unique( (array)$this->mVaryHeader[$header] );
        }
 
        /**
@@ -1646,12 +1753,12 @@ class OutputPage {
         *   /w/index.php?title=Main_page&variant=zh-cn should never be served.
         */
        function addAcceptLanguage() {
-               global $wgContLang;
-               if( !$this->getRequest()->getCheck( 'variant' ) && $wgContLang->hasVariants() ) {
-                       $variants = $wgContLang->getVariants();
+               $lang = $this->getTitle()->getPageLanguage();
+               if( !$this->getRequest()->getCheck( 'variant' ) && $lang->hasVariants() ) {
+                       $variants = $lang->getVariants();
                        $aloption = array();
                        foreach ( $variants as $variant ) {
-                               if( $variant === $wgContLang->getCode() ) {
+                               if( $variant === $lang->getCode() ) {
                                        continue;
                                } else {
                                        $aloption[] = 'string-contains=' . $variant;
@@ -1672,12 +1779,14 @@ class OutputPage {
        }
 
        /**
-        * Set a flag which will cause an X-Frame-Options header appropriate for 
-        * edit pages to be sent. The header value is controlled by 
+        * Set a flag which will cause an X-Frame-Options header appropriate for
+        * edit pages to be sent. The header value is controlled by
         * $wgEditPageFrameOptions.
         *
-        * This is the default for special pages. If you display a CSRF-protected 
+        * This is the default for special pages. If you display a CSRF-protected
         * form on an ordinary view page, then you need to call this function.
+        *
+        * @param $enable bool
         */
        public function preventClickjacking( $enable = true ) {
                $this->mPreventClickjacking = $enable;
@@ -1693,9 +1802,11 @@ class OutputPage {
        }
 
        /**
-        * Get the X-Frame-Options header value (without the name part), or false 
-        * if there isn't one. This is used by Skin to determine whether to enable 
+        * Get the X-Frame-Options header value (without the name part), or false
+        * if there isn't one. This is used by Skin to determine whether to enable
         * JavaScript frame-breaking, for clients that don't support X-Frame-Options.
+        *
+        * @return string
         */
        public function getFrameOptions() {
                global $wgBreakFrames, $wgEditPageFrameOptions;
@@ -1704,6 +1815,7 @@ class OutputPage {
                } elseif ( $this->mPreventClickjacking && $wgEditPageFrameOptions ) {
                        return $wgEditPageFrameOptions;
                }
+               return false;
        }
 
        /**
@@ -1780,57 +1892,12 @@ class OutputPage {
         * @param $code Integer: status code
         * @return String or null: message or null if $code is not in the list of
         *         messages
+        *
+        * @deprecated since 1.18 Use HttpStatus::getMessage() instead.
         */
        public static function getStatusMessage( $code ) {
-               static $statusMessage = array(
-                       100 => 'Continue',
-                       101 => 'Switching Protocols',
-                       102 => 'Processing',
-                       200 => 'OK',
-                       201 => 'Created',
-                       202 => 'Accepted',
-                       203 => 'Non-Authoritative Information',
-                       204 => 'No Content',
-                       205 => 'Reset Content',
-                       206 => 'Partial Content',
-                       207 => 'Multi-Status',
-                       300 => 'Multiple Choices',
-                       301 => 'Moved Permanently',
-                       302 => 'Found',
-                       303 => 'See Other',
-                       304 => 'Not Modified',
-                       305 => 'Use Proxy',
-                       307 => 'Temporary Redirect',
-                       400 => 'Bad Request',
-                       401 => 'Unauthorized',
-                       402 => 'Payment Required',
-                       403 => 'Forbidden',
-                       404 => 'Not Found',
-                       405 => 'Method Not Allowed',
-                       406 => 'Not Acceptable',
-                       407 => 'Proxy Authentication Required',
-                       408 => 'Request Timeout',
-                       409 => 'Conflict',
-                       410 => 'Gone',
-                       411 => 'Length Required',
-                       412 => 'Precondition Failed',
-                       413 => 'Request Entity Too Large',
-                       414 => 'Request-URI Too Large',
-                       415 => 'Unsupported Media Type',
-                       416 => 'Request Range Not Satisfiable',
-                       417 => 'Expectation Failed',
-                       422 => 'Unprocessable Entity',
-                       423 => 'Locked',
-                       424 => 'Failed Dependency',
-                       500 => 'Internal Server Error',
-                       501 => 'Not Implemented',
-                       502 => 'Bad Gateway',
-                       503 => 'Service Unavailable',
-                       504 => 'Gateway Timeout',
-                       505 => 'HTTP Version Not Supported',
-                       507 => 'Insufficient Storage'
-               );
-               return isset( $statusMessage[$code] ) ? $statusMessage[$code] : null;
+               wfDeprecated( __METHOD__ );
+               return HttpStatus::getMessage( $code );
        }
 
        /**
@@ -1838,8 +1905,7 @@ class OutputPage {
         * the object, let's actually output it:
         */
        public function output() {
-               global $wgOutputEncoding;
-               global $wgLanguageCode, $wgDebugRedirects, $wgMimeType;
+               global $wgLanguageCode, $wgDebugRedirects, $wgMimeType, $wgVaryOnXFP;
 
                if( $this->mDoNothing ) {
                        return;
@@ -1851,29 +1917,39 @@ class OutputPage {
 
                if ( $this->mRedirect != '' ) {
                        # Standards require redirect URLs to be absolute
-                       $this->mRedirect = wfExpandUrl( $this->mRedirect );
-                       if( $this->mRedirectCode == '301' || $this->mRedirectCode == '303' ) {
-                               if( !$wgDebugRedirects ) {
-                                       $message = self::getStatusMessage( $this->mRedirectCode );
-                                       $response->header( "HTTP/1.1 {$this->mRedirectCode} $message" );
+                       $this->mRedirect = wfExpandUrl( $this->mRedirect, PROTO_CURRENT );
+
+                       $redirect = $this->mRedirect;
+                       $code = $this->mRedirectCode;
+
+                       if( wfRunHooks( "BeforePageRedirect", array( $this, &$redirect, &$code ) ) ) {
+                               if( $code == '301' || $code == '303' ) {
+                                       if( !$wgDebugRedirects ) {
+                                               $message = HttpStatus::getMessage( $code );
+                                               $response->header( "HTTP/1.1 $code $message" );
+                                       }
+                                       $this->mLastModified = wfTimestamp( TS_RFC2822 );
+                               }
+                               if ( $wgVaryOnXFP ) {
+                                       $this->addVaryHeader( 'X-Forwarded-Proto' );
+                               }
+                               $this->sendCacheControl();
+
+                               $response->header( "Content-Type: text/html; charset=utf-8" );
+                               if( $wgDebugRedirects ) {
+                                       $url = htmlspecialchars( $redirect );
+                                       print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
+                                       print "<p>Location: <a href=\"$url\">$url</a></p>\n";
+                                       print "</body>\n</html>\n";
+                               } else {
+                                       $response->header( 'Location: ' . $redirect );
                                }
-                               $this->mLastModified = wfTimestamp( TS_RFC2822 );
-                       }
-                       $this->sendCacheControl();
-
-                       $response->header( "Content-Type: text/html; charset=utf-8" );
-                       if( $wgDebugRedirects ) {
-                               $url = htmlspecialchars( $this->mRedirect );
-                               print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
-                               print "<p>Location: <a href=\"$url\">$url</a></p>\n";
-                               print "</body>\n</html>\n";
-                       } else {
-                               $response->header( 'Location: ' . $this->mRedirect );
                        }
+
                        wfProfileOut( __METHOD__ );
                        return;
                } elseif ( $this->mStatusCode ) {
-                       $message = self::getStatusMessage( $this->mStatusCode );
+                       $message = HttpStatus::getMessage( $this->mStatusCode );
                        if ( $message ) {
                                $response->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $message );
                        }
@@ -1882,7 +1958,7 @@ class OutputPage {
                # Buffer output; final headers may depend on later processing
                ob_start();
 
-               $response->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
+               $response->header( "Content-type: $wgMimeType; charset=UTF-8" );
                $response->header( 'Content-language: ' . $wgLanguageCode );
 
                // Prevent framing, if requested
@@ -1896,14 +1972,14 @@ class OutputPage {
                } else {
                        $this->addDefaultModules();
 
-                       $sk = $this->getSkin( $this->getTitle() );
+                       $sk = $this->getSkin();
 
                        // Hook that allows last minute changes to the output page, e.g.
                        // adding of CSS or Javascript by extensions.
                        wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
 
                        wfProfileIn( 'Output-skin' );
-                       $sk->outputPage( $this );
+                       $sk->outputPage();
                        wfProfileOut( 'Output-skin' );
                }
 
@@ -1913,22 +1989,12 @@ class OutputPage {
        }
 
        /**
-        * Actually output something with print(). Performs an iconv to the
-        * output encoding, if needed.
+        * Actually output something with print().
         *
         * @param $ins String: the string to output
         */
        public function out( $ins ) {
-               global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
-               if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
-                       $outs = $ins;
-               } else {
-                       $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
-                       if ( false === $outs ) {
-                               $outs = $ins;
-                       }
-               }
-               print $outs;
+               print $ins;
        }
 
        /**
@@ -1940,25 +2006,50 @@ class OutputPage {
        }
 
        /**
-        * Output a standard error page
+        * Prepare this object to display an error page; disable caching and
+        * indexing, clear the current text and redirect, set the page's title
+        * and optionally an custom HTML title (content of the <title> tag).
         *
-        * @param $title String: message key for page title
-        * @param $msg String: message key for page text
-        * @param $params Array: message parameters
+        * @param $pageTitle String|Message will be passed directly to setPageTitle()
+        * @param $htmlTitle String|Message will be passed directly to setHTMLTitle();
+        *                   optional, if not passed the <title> attribute will be
+        *                   based on $pageTitle
         */
-       public function showErrorPage( $title, $msg, $params = array() ) {
+       public function prepareErrorPage( $pageTitle, $htmlTitle = false ) {
                if ( $this->getTitle() ) {
                        $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
                }
-               $this->setPageTitle( wfMsg( $title ) );
-               $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
+
+               $this->setPageTitle( $pageTitle );
+               if ( $htmlTitle !== false ) {
+                       $this->setHTMLTitle( $htmlTitle );
+               }
                $this->setRobotPolicy( 'noindex,nofollow' );
                $this->setArticleRelated( false );
                $this->enableClientCache( false );
                $this->mRedirect = '';
-               $this->mBodytext = '';
+               $this->clearSubtitle();
+               $this->clearHTML();
+       }
+
+       /**
+        * Output a standard error page
+        *
+        * showErrorPage( 'titlemsg', 'pagetextmsg', array( 'param1', 'param2' ) );
+        * showErrorPage( 'titlemsg', $messageObject );
+        *
+        * @param $title String: message key for page title
+        * @param $msg Mixed: message key (string) for page text, or a Message object
+        * @param $params Array: message parameters; ignored if $msg is a Message object
+        */
+       public function showErrorPage( $title, $msg, $params = array() ) {
+               $this->prepareErrorPage( $this->msg( $title ), $this->msg( 'errorpagetitle' ) );
 
-               $this->addWikiMsgArray( $msg, $params );
+               if ( $msg instanceof Message ){
+                       $this->addHTML( $msg->parse() );
+               } else {
+                       $this->addWikiMsgArray( $msg, $params );
+               }
 
                $this->returnToMain();
        }
@@ -1970,16 +2061,71 @@ class OutputPage {
         * @param $action String: action that was denied or null if unknown
         */
        public function showPermissionsErrorPage( $errors, $action = null ) {
-               $this->mDebugtext .= 'Original title: ' .
-               $this->getTitle()->getPrefixedText() . "\n";
-               $this->setPageTitle( wfMsg( 'permissionserrors' ) );
-               $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
-               $this->setRobotPolicy( 'noindex,nofollow' );
-               $this->setArticleRelated( false );
-               $this->enableClientCache( false );
-               $this->mRedirect = '';
-               $this->mBodytext = '';
-               $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
+               global $wgGroupPermissions;
+
+               // For some action (read, edit, create and upload), display a "login to do this action"
+               // error if all of the following conditions are met:
+               // 1. the user is not logged in
+               // 2. the only error is insufficient permissions (i.e. no block or something else)
+               // 3. the error can be avoided simply by logging in
+               if ( in_array( $action, array( 'read', 'edit', 'createpage', 'createtalk', 'upload' ) )
+                       && $this->getUser()->isAnon() && count( $errors ) == 1 && isset( $errors[0][0] )
+                       && ( $errors[0][0] == 'badaccess-groups' || $errors[0][0] == 'badaccess-group0' )
+                       && ( ( isset( $wgGroupPermissions['user'][$action] ) && $wgGroupPermissions['user'][$action] )
+                       || ( isset( $wgGroupPermissions['autoconfirmed'][$action] ) && $wgGroupPermissions['autoconfirmed'][$action] ) )
+               ) {
+                       $displayReturnto = null;
+
+                       # Due to bug 32276, if a user does not have read permissions,
+                       # $this->getTitle() will just give Special:Badtitle, which is
+                       # not especially useful as a returnto parameter. Use the title
+                       # from the request instead, if there was one.
+                       $request = $this->getRequest();
+                       $returnto = Title::newFromURL( $request->getVal( 'title', '' ) );
+                       if ( $action == 'edit' ) {
+                               $msg = 'whitelistedittext';
+                               $displayReturnto = $returnto;
+                       } elseif ( $action == 'createpage' || $action == 'createtalk' ) {
+                               $msg = 'nocreatetext';
+                       } elseif ( $action == 'upload' ) {
+                               $msg = 'uploadnologintext';
+                       } else { # Read
+                               $msg = 'loginreqpagetext';
+                               $displayReturnto = Title::newMainPage();
+                       }
+
+                       $query = array();
+
+                       if ( $returnto ) {
+                               $query['returnto'] = $returnto->getPrefixedText();
+
+                               if ( !$request->wasPosted() ) {
+                                       $returntoquery = $request->getValues();
+                                       unset( $returntoquery['title'] );
+                                       unset( $returntoquery['returnto'] );
+                                       unset( $returntoquery['returntoquery'] );
+                                       $query['returntoquery'] = wfArrayToCGI( $returntoquery );
+                               }
+                       }
+                       $loginLink = Linker::linkKnown(
+                               SpecialPage::getTitleFor( 'Userlogin' ),
+                               $this->msg( 'loginreqlink' )->escaped(),
+                               array(),
+                               $query
+                       );
+
+                       $this->prepareErrorPage( $this->msg( 'loginreqtitle' ) );
+                       $this->addHTML( $this->msg( $msg )->rawParams( $loginLink )->parse() );
+
+                       # Don't return to a page the user can't read otherwise
+                       # we'll end up in a pointless loop
+                       if ( $displayReturnto && $displayReturnto->userCan( 'read', $this->getUser() ) ) {
+                               $this->returnToMain( null, $displayReturnto );
+                       }
+               } else {
+                       $this->prepareErrorPage( $this->msg( 'permissionserrors' ) );
+                       $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
+               }
        }
 
        /**
@@ -1989,11 +2135,7 @@ class OutputPage {
         * @param $version Mixed: the version of MediaWiki needed to use the page
         */
        public function versionRequired( $version ) {
-               $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
-               $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
-               $this->setRobotPolicy( 'noindex,nofollow' );
-               $this->setArticleRelated( false );
-               $this->mBodytext = '';
+               $this->prepareErrorPage( $this->msg( 'versionrequired', $version ) );
 
                $this->addWikiMsg( 'versionrequiredtext', $version );
                $this->returnToMain();
@@ -2010,34 +2152,11 @@ class OutputPage {
 
        /**
         * Produce the stock "please login to use the wiki" page
+        *
+        * @deprecated in 1.19; throw the exception directly
         */
        public function loginToUse() {
-               if( $this->getUser()->isLoggedIn() ) {
-                       throw new PermissionsError( 'read' );
-               }
-
-               $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
-               $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
-               $this->setRobotPolicy( 'noindex,nofollow' );
-               $this->setArticleRelated( false );
-
-               $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
-               $loginLink = $this->getSkin()->link(
-                       $loginTitle,
-                       wfMsgHtml( 'loginreqlink' ),
-                       array(),
-                       array( 'returnto' => $this->getTitle()->getPrefixedText() ),
-                       array( 'known', 'noclasses' )
-               );
-               $this->addWikiMsgArray( 'loginreqpagetext', array( $loginLink ), array( 'replaceafter' ) );
-               $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . '-->' );
-
-               # Don't return to the main page if the user can't read it
-               # otherwise we'll end up in a pointless loop
-               $mainPage = Title::newMainPage();
-               if( $mainPage->userCanRead() ) {
-                       $this->returnToMain( null, $mainPage );
-               }
+               throw new PermissionsError( 'read' );
        }
 
        /**
@@ -2049,14 +2168,14 @@ class OutputPage {
         */
        public function formatPermissionsErrorMessage( $errors, $action = null ) {
                if ( $action == null ) {
-                       $text = wfMsgNoTrans( 'permissionserrorstext', count( $errors ) ) . "\n\n";
+                       $text = $this->msg( 'permissionserrorstext', count( $errors ) )->plain() . "\n\n";
                } else {
-                       $action_desc = wfMsgNoTrans( "action-$action" );
-                       $text = wfMsgNoTrans(
+                       $action_desc = $this->msg( "action-$action" )->plain();
+                       $text = $this->msg(
                                'permissionserrorstext-withaction',
                                count( $errors ),
                                $action_desc
-                       ) . "\n\n";
+                       )->plain() . "\n\n";
                }
 
                if ( count( $errors ) > 1 ) {
@@ -2064,13 +2183,13 @@ class OutputPage {
 
                        foreach( $errors as $error ) {
                                $text .= '<li>';
-                               $text .= call_user_func_array( 'wfMsgNoTrans', $error );
+                               $text .= call_user_func_array( array( $this, 'msg' ), $error )->plain();
                                $text .= "</li>\n";
                        }
                        $text .= '</ul>';
                } else {
                        $text .= "<div class=\"permissions-errors\">\n" .
-                                       call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) .
+                                       call_user_func_array( array( $this, 'msg' ), reset( $errors ) )->plain() .
                                        "\n</div>";
                }
 
@@ -2110,12 +2229,10 @@ class OutputPage {
                if ( !empty( $reasons ) ) {
                        // Permissions error
                        if( $source ) {
-                               $this->setPageTitle( wfMsg( 'viewsource' ) );
-                               $this->setSubtitle(
-                                       wfMsg( 'viewsourcefor', $this->getSkin()->linkKnown( $this->getTitle() ) )
-                               );
+                               $this->setPageTitle( $this->msg( 'viewsource-title', $this->getTitle()->getPrefixedText() ) );
+                               $this->addBacklinkSubtitle( $this->getTitle() );
                        } else {
-                               $this->setPageTitle( wfMsg( 'badaccess' ) );
+                               $this->setPageTitle( $this->msg( 'badaccess' ) );
                        }
                        $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
                } else {
@@ -2127,20 +2244,22 @@ class OutputPage {
                if( is_string( $source ) ) {
                        $this->addWikiMsg( 'viewsourcetext' );
 
+                       $pageLang = $this->getTitle()->getPageLanguage();
                        $params = array(
                                'id'   => 'wpTextbox1',
                                'name' => 'wpTextbox1',
                                'cols' => $this->getUser()->getOption( 'cols' ),
                                'rows' => $this->getUser()->getOption( 'rows' ),
-                               'readonly' => 'readonly'
+                               'readonly' => 'readonly',
+                               'lang' => $pageLang->getHtmlCode(),
+                               'dir' => $pageLang->getDir(),
                        );
                        $this->addHTML( Html::element( 'textarea', $params, $source ) );
 
                        // Show templates used by this article
-                       $skin = $this->getSkin();
-                       $article = new Article( $this->getTitle() );
+                       $templates = Linker::formatTemplates( $this->getTitle()->getTemplateLinksFrom() );
                        $this->addHTML( "<div class='templatesUsed'>
-{$skin->formatTemplates( $article->getUsedTemplates() )}
+$templates
 </div>
 " );
                }
@@ -2158,16 +2277,7 @@ class OutputPage {
         * for when rate limiting has triggered.
         */
        public function rateLimited() {
-               $this->setPageTitle( wfMsg( 'actionthrottled' ) );
-               $this->setRobotPolicy( 'noindex,follow' );
-               $this->setArticleRelated( false );
-               $this->enableClientCache( false );
-               $this->mRedirect = '';
-               $this->clearHTML();
-               $this->setStatusCode( 503 );
-               $this->addWikiMsg( 'actionthrottledtext' );
-
-               $this->returnToMain( null, $this->getTitle() );
+               throw new ThrottledError;
        }
 
        /**
@@ -2186,52 +2296,47 @@ class OutputPage {
                                ? 'lag-warn-normal'
                                : 'lag-warn-high';
                        $wrap = Html::rawElement( 'div', array( 'class' => "mw-{$message}" ), "\n$1\n" );
-                       $this->wrapWikiMsg( "$wrap\n", array( $message, $this->getContext()->getLang()->formatNum( $lag ) ) );
+                       $this->wrapWikiMsg( "$wrap\n", array( $message, $this->getLanguage()->formatNum( $lag ) ) );
                }
        }
 
        public function showFatalError( $message ) {
-               $this->setPageTitle( wfMsg( 'internalerror' ) );
-               $this->setRobotPolicy( 'noindex,nofollow' );
-               $this->setArticleRelated( false );
-               $this->enableClientCache( false );
-               $this->mRedirect = '';
-               $this->mBodytext = $message;
+               $this->prepareErrorPage( $this->msg( 'internalerror' ) );
+
+               $this->addHTML( $message );
        }
 
        public function showUnexpectedValueError( $name, $val ) {
-               $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
+               $this->showFatalError( $this->msg( 'unexpected', $name, $val )->text() );
        }
 
        public function showFileCopyError( $old, $new ) {
-               $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
+               $this->showFatalError( $this->msg( 'filecopyerror', $old, $new )->text() );
        }
 
        public function showFileRenameError( $old, $new ) {
-               $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
+               $this->showFatalError( $this->msg( 'filerenameerror', $old, $new )->text() );
        }
 
        public function showFileDeleteError( $name ) {
-               $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
+               $this->showFatalError( $this->msg( 'filedeleteerror', $name )->text() );
        }
 
        public function showFileNotFoundError( $name ) {
-               $this->showFatalError( wfMsg( 'filenotfound', $name ) );
+               $this->showFatalError( $this->msg( 'filenotfound', $name )->text() );
        }
 
        /**
         * Add a "return to" link pointing to a specified title
         *
         * @param $title Title to link
-        * @param $query String: query string
+        * @param $query String query string
         * @param $text String text of the link (input is not escaped)
         */
        public function addReturnTo( $title, $query = array(), $text = null ) {
                $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullURL() ) );
-               $link = wfMsgHtml(
-                       'returnto',
-                       $this->getSkin()->link( $title, $text, array(), $query )
-               );
+               $link = $this->msg( 'returnto' )->rawParams(
+                       Linker::link( $title, $text, array(), $query ) )->escaped();
                $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
        }
 
@@ -2274,18 +2379,19 @@ class OutputPage {
         * @return String: The doctype, opening <html>, and head element.
         */
        public function headElement( Skin $sk, $includeStyle = true ) {
-               global $wgUseTrackbacks;
+               global $wgContLang;
+
+               $userdir = $this->getLanguage()->getDir();
+               $sitedir = $wgContLang->getDir();
 
                if ( $sk->commonPrintStylesheet() ) {
                        $this->addModuleStyles( 'mediawiki.legacy.wikiprintable' );
                }
-               $sk->setupUserCss( $this );
 
-               $lang = wfUILang();
-               $ret = Html::htmlHeader( array( 'lang' => $lang->getCode(), 'dir' => $lang->getDir() ) );
+               $ret = Html::htmlHeader( array( 'lang' => $this->getLanguage()->getHtmlCode(), 'dir' => $userdir, 'class' => 'client-nojs' ) );
 
                if ( $this->getHTMLTitle() == '' ) {
-                       $this->setHTMLTitle( wfMsg( 'pagetitle', $this->getPageTitle() ) );
+                       $this->setHTMLTitle( $this->msg( 'pagetitle', $this->getPageTitle() ) );
                }
 
                $openHead = Html::openElement( 'head' );
@@ -2297,16 +2403,12 @@ class OutputPage {
                $ret .= Html::element( 'title', null, $this->getHTMLTitle() ) . "\n";
 
                $ret .= implode( "\n", array(
-                       $this->getHeadLinks( $sk, true ),
-                       $this->buildCssLinks( $sk ),
-                       $this->getHeadScripts( $sk ),
+                       $this->getHeadLinks( null, true ),
+                       $this->buildCssLinks(),
+                       $this->getHeadScripts(),
                        $this->getHeadItems()
                ) );
 
-               if ( $wgUseTrackbacks && $this->isArticleRelated() ) {
-                       $ret .= $this->getTitle()->trackbackRDF();
-               }
-
                $closeHead = Html::closeElement( 'head' );
                if ( $closeHead ) {
                        $ret .= "$closeHead\n";
@@ -2314,30 +2416,16 @@ class OutputPage {
 
                $bodyAttrs = array();
 
-               # Crazy edit-on-double-click stuff
-               $action = $this->getRequest()->getVal( 'action', 'view' );
-
-               if (
-                       $this->getTitle()->getNamespace() != NS_SPECIAL &&
-                       in_array( $action, array( 'view', 'purge' ) ) &&
-                       $this->getUser()->getOption( 'editondblclick' )
-               )
-               {
-                       $editUrl = $this->getTitle()->getLocalUrl( $sk->editUrlOptions() );
-                       $bodyAttrs['ondblclick'] = "document.location = '" .
-                               Xml::escapeJsString( $editUrl ) . "'";
-               }
-
-               # Class bloat
-               $dir = wfUILang()->getDir();
-               $bodyAttrs['class'] = "mediawiki $dir";
+               # Classes for LTR/RTL directionality support
+               $bodyAttrs['class'] = "mediawiki $userdir sitedir-$sitedir";
 
-               if ( $this->getContext()->getLang()->capitalizeAllNouns() ) {
+               if ( $this->getLanguage()->capitalizeAllNouns() ) {
                        # A <body> class is probably not the best way to do this . . .
                        $bodyAttrs['class'] .= ' capitalize-all-nouns';
                }
                $bodyAttrs['class'] .= ' ' . $sk->getPageClasses( $this->getTitle() );
                $bodyAttrs['class'] .= ' skin-' . Sanitizer::escapeClass( $sk->getSkinName() );
+               $bodyAttrs['class'] .= ' action-' . Sanitizer::escapeClass( Action::getActionName( $this->getContext() ) );
 
                $sk->addToBodyAttributes( $this, $bodyAttrs ); // Allow skins to add body attributes they need
                wfRunHooks( 'OutputPageBodyAttributes', array( $this, $sk, &$bodyAttrs ) );
@@ -2351,15 +2439,25 @@ class OutputPage {
         * Add the default ResourceLoader modules to this object
         */
        private function addDefaultModules() {
-               global $wgIncludeLegacyJavaScript,
-                       $wgUseAjax, $wgAjaxWatch, $wgEnableMWSuggest;
+               global $wgIncludeLegacyJavaScript, $wgPreloadJavaScriptMwUtil, $wgUseAjax,
+                       $wgAjaxWatch, $wgEnableMWSuggest;
 
                // Add base resources
-               $this->addModules( 'mediawiki.util' );
-               if( $wgIncludeLegacyJavaScript ){
+               $this->addModules( array(
+                       'mediawiki.user',
+                       'mediawiki.page.startup',
+                       'mediawiki.page.ready',
+               ) );
+               if ( $wgIncludeLegacyJavaScript ){
                        $this->addModules( 'mediawiki.legacy.wikibits' );
                }
 
+               if ( $wgPreloadJavaScriptMwUtil ) {
+                       $this->addModules( 'mediawiki.util' );
+               }
+
+               MWDebug::addModules( $this );
+
                // Add various resources if required
                if ( $wgUseAjax ) {
                        $this->addModules( 'mediawiki.legacy.ajax' );
@@ -2375,9 +2473,14 @@ class OutputPage {
                        }
                }
 
-               if( $this->getUser()->getBoolOption( 'editsectiononrightclick' ) ) {
+               if ( $this->getUser()->getBoolOption( 'editsectiononrightclick' ) ) {
                        $this->addModules( 'mediawiki.action.view.rightClickEdit' );
                }
+
+               # Crazy edit-on-double-click stuff
+               if ( $this->isArticle() && $this->getUser()->getOption( 'editondblclick' ) ) {
+                       $this->addModules( 'mediawiki.action.view.dblClickEdit' );
+               }
        }
 
        /**
@@ -2390,35 +2493,19 @@ class OutputPage {
                        $this->mResourceLoader = new ResourceLoader();
                }
                return $this->mResourceLoader;
-       }               
+       }
 
        /**
         * TODO: Document
-        * @param $skin Skin
-        * @param $modules Array/string with the module name
+        * @param $modules Array/string with the module name(s)
         * @param $only String ResourceLoaderModule TYPE_ class constant
         * @param $useESI boolean
+        * @param $extraQuery Array with extra query parameters to add to each request. array( param => value )
+        * @param $loadCall boolean If true, output a mw.loader.load() call rather than a <script src="..."> tag
         * @return string html <script> and <style> tags
         */
-       protected function makeResourceLoaderLink( Skin $skin, $modules, $only, $useESI = false ) {
-               global $wgLoadScript, $wgResourceLoaderUseESI,
-                       $wgResourceLoaderInlinePrivateModules;
-               // Lazy-load ResourceLoader
-               // TODO: Should this be a static function of ResourceLoader instead?
-               // TODO: Divide off modules starting with "user", and add the user parameter to them
-               $baseQuery = array(
-                       'lang' => $this->getContext()->getLang()->getCode(),
-                       'debug' => ResourceLoader::inDebugMode() ? 'true' : 'false',
-                       'skin' => $skin->getSkinName(),
-                       'only' => $only,
-               );
-               // Propagate printable and handheld parameters if present
-               if ( $this->isPrintable() ) {
-                       $baseQuery['printable'] = 1;
-               }
-               if ( $this->getRequest()->getBool( 'handheld' ) ) {
-                       $baseQuery['handheld'] = 1;
-               }
+       protected function makeResourceLoaderLink( $modules, $only, $useESI = false, array $extraQuery = array(), $loadCall = false ) {
+               global $wgResourceLoaderUseESI, $wgResourceLoaderInlinePrivateModules;
 
                if ( !count( $modules ) ) {
                        return '';
@@ -2434,7 +2521,7 @@ class OutputPage {
                                // Recursively call us for every item
                                $links = '';
                                foreach ( $modules as $name ) {
-                                       $links .= $this->makeResourceLoaderLink( $skin, $name, $only, $useESI );
+                                       $links .= $this->makeResourceLoaderLink( $name, $only, $useESI );
                                }
                                return $links;
                        }
@@ -2446,7 +2533,8 @@ class OutputPage {
                foreach ( (array) $modules as $name ) {
                        $module = $resourceLoader->getModule( $name );
                        # Check that we're allowed to include this module on this page
-                       if ( ( $module->getOrigin() > $this->getAllowedModules( ResourceLoaderModule::TYPE_SCRIPTS )
+                       if ( !$module
+                               || ( $module->getOrigin() > $this->getAllowedModules( ResourceLoaderModule::TYPE_SCRIPTS )
                                        && $only == ResourceLoaderModule::TYPE_SCRIPTS )
                                || ( $module->getOrigin() > $this->getAllowedModules( ResourceLoaderModule::TYPE_STYLES )
                                        && $only == ResourceLoaderModule::TYPE_STYLES )
@@ -2464,14 +2552,26 @@ class OutputPage {
 
                $links = '';
                foreach ( $groups as $group => $modules ) {
-                       $query = $baseQuery;
                        // Special handling for user-specific groups
+                       $user = null;
                        if ( ( $group === 'user' || $group === 'private' ) && $this->getUser()->isLoggedIn() ) {
-                               $query['user'] = $this->getUser()->getName();
+                               $user = $this->getUser()->getName();
                        }
-                       
+
                        // Create a fake request based on the one we are about to make so modules return
                        // correct timestamp and emptiness data
+                       $query = ResourceLoader::makeLoaderQuery(
+                               array(), // modules; not determined yet
+                               $this->getLanguage()->getCode(),
+                               $this->getSkin()->getSkinName(),
+                               $user,
+                               null, // version; not determined yet
+                               ResourceLoader::inDebugMode(),
+                               $only === ResourceLoaderModule::TYPE_COMBINED ? null : $only,
+                               $this->isPrintable(),
+                               $this->getRequest()->getBool( 'handheld' ),
+                               $extraQuery
+                       );
                        $context = new ResourceLoaderContext( $resourceLoader, new FauxRequest( $query ) );
                        // Drop modules that know they're empty
                        foreach ( $modules as $key => $module ) {
@@ -2483,10 +2583,10 @@ class OutputPage {
                        if ( $modules === array() ) {
                                continue;
                        }
-                       
-                       $query['modules'] = implode( '|', array_keys( $modules ) );
-                       
-                       // Support inlining of private modules if configured as such
+
+                       // Support inlining of private modules if configured as such. Note that these
+                       // modules should be loaded from getHeadScripts() before the first loader call.
+                       // Otherwise other modules can't properly use them as dependencies (bug 30914)
                        if ( $group === 'private' && $wgResourceLoaderInlinePrivateModules ) {
                                if ( $only == ResourceLoaderModule::TYPE_STYLES ) {
                                        $links .= Html::inlineStyle(
@@ -2499,6 +2599,7 @@ class OutputPage {
                                                )
                                        );
                                }
+                               $links .= "\n";
                                continue;
                        }
                        // Special handling for the user group; because users might change their stuff
@@ -2506,6 +2607,7 @@ class OutputPage {
                        // timestamp of these user-changable modules so we can ensure cache misses on change
                        // This should NOT be done for the site group (bug 27564) because anons get that too
                        // and we shouldn't be putting timestamps in Squid-cached HTML
+                       $version = null;
                        if ( $group === 'user' ) {
                                // Get the maximum timestamp
                                $timestamp = 1;
@@ -2513,12 +2615,21 @@ class OutputPage {
                                        $timestamp = max( $timestamp, $module->getModifiedTime( $context ) );
                                }
                                // Add a version parameter so cache will break when things change
-                               $query['version'] = wfTimestamp( TS_ISO_8601_BASIC, $timestamp );
+                               $version = wfTimestamp( TS_ISO_8601_BASIC, $timestamp );
                        }
-                       // Make queries uniform in order
-                       ksort( $query );
 
-                       $url = wfAppendQuery( $wgLoadScript, $query );
+                       $url = ResourceLoader::makeLoaderURL(
+                               array_keys( $modules ),
+                               $this->getLanguage()->getCode(),
+                               $this->getSkin()->getSkinName(),
+                               $user,
+                               $version,
+                               ResourceLoader::inDebugMode(),
+                               $only === ResourceLoaderModule::TYPE_COMBINED ? null : $only,
+                               $this->isPrintable(),
+                               $this->getRequest()->getBool( 'handheld' ),
+                               $extraQuery
+                       );
                        if ( $useESI && $wgResourceLoaderUseESI ) {
                                $esi = Xml::element( 'esi:include', array( 'src' => $url ) );
                                if ( $only == ResourceLoaderModule::TYPE_STYLES ) {
@@ -2529,9 +2640,15 @@ class OutputPage {
                        } else {
                                // Automatically select style/script elements
                                if ( $only === ResourceLoaderModule::TYPE_STYLES ) {
-                                       $link = Html::linkedStyle( wfAppendQuery( $wgLoadScript, $query ) );
+                                       $link = Html::linkedStyle( $url );
+                               } else if ( $loadCall ) { 
+                                       $link = Html::inlineScript(
+                                               ResourceLoader::makeLoaderConditionalScript(
+                                                       Xml::encodeJsCall( 'mw.loader.load', array( $url ) )
+                                               )
+                                       );
                                } else {
-                                       $link = Html::linkedScript( wfAppendQuery( $wgLoadScript, $query ) );
+                                       $link = Html::linkedScript( $url );
                                }
                        }
 
@@ -2548,24 +2665,31 @@ class OutputPage {
         * JS stuff to put in the <head>. This is the startup module, config
         * vars and modules marked with position 'top'
         *
-        * @param $sk Skin object to use
         * @return String: HTML fragment
         */
-       function getHeadScripts( Skin $sk ) {
-               // Startup - this will immediately load jquery and mediawiki modules
-               $scripts = $this->makeResourceLoaderLink( $sk, 'startup', ResourceLoaderModule::TYPE_SCRIPTS, true );
+       function getHeadScripts() {
+               global $wgResourceLoaderExperimentalAsyncLoading;
                
+               // Startup - this will immediately load jquery and mediawiki modules
+               $scripts = $this->makeResourceLoaderLink( 'startup', ResourceLoaderModule::TYPE_SCRIPTS, true );
+
                // Load config before anything else
                $scripts .= Html::inlineScript(
                        ResourceLoader::makeLoaderConditionalScript(
                                ResourceLoader::makeConfigSetScript( $this->getJSVars() )
                        )
                );
-               
+
+               // Load embeddable private modules before any loader links
+               // This needs to be TYPE_COMBINED so these modules are properly wrapped
+               // in mw.loader.implement() calls and deferred until mw.user is available
+               $embedScripts = array( 'user.options', 'user.tokens' );
+               $scripts .= $this->makeResourceLoaderLink( $embedScripts, ResourceLoaderModule::TYPE_COMBINED );
+
                // Script and Messages "only" requests marked for top inclusion
                // Messages should go first
-               $scripts .= $this->makeResourceLoaderLink( $sk, $this->getModuleMessages( true, 'top' ), ResourceLoaderModule::TYPE_MESSAGES );
-               $scripts .= $this->makeResourceLoaderLink( $sk, $this->getModuleScripts( true, 'top' ), ResourceLoaderModule::TYPE_SCRIPTS );
+               $scripts .= $this->makeResourceLoaderLink( $this->getModuleMessages( true, 'top' ), ResourceLoaderModule::TYPE_MESSAGES );
+               $scripts .= $this->makeResourceLoaderLink( $this->getModuleScripts( true, 'top' ), ResourceLoaderModule::TYPE_SCRIPTS );
 
                // Modules requests - let the client calculate dependencies and batch requests as it likes
                // Only load modules that have marked themselves for loading at the top
@@ -2573,26 +2697,41 @@ class OutputPage {
                if ( $modules ) {
                        $scripts .= Html::inlineScript(
                                ResourceLoader::makeLoaderConditionalScript(
-                                       Xml::encodeJsCall( 'mw.loader.load', array( $modules ) ) .
-                                       Xml::encodeJsCall( 'mw.loader.go', array() )
+                                       Xml::encodeJsCall( 'mw.loader.load', array( $modules, null, true ) )
                                )
                        );
                }
+               
+               if ( $wgResourceLoaderExperimentalAsyncLoading ) {
+                       $scripts .= $this->getScriptsForBottomQueue( true );
+               }
 
                return $scripts;
        }
-       
+
        /**
-        * JS stuff to put at the bottom of the <body>: modules marked with position 'bottom',
-        * legacy scripts ($this->mScripts), user preferences, site JS and user JS
+        * JS stuff to put at the 'bottom', which can either be the bottom of the <body>
+        * or the bottom of the <head> depending on $wgResourceLoaderExperimentalAsyncLoading:
+        * modules marked with position 'bottom', legacy scripts ($this->mScripts),
+        * user preferences, site JS and user JS
+        *
+        * @param $inHead boolean If true, this HTML goes into the <head>, if false it goes into the <body>
+        * @return string
         */
-       function getBottomScripts( Skin $sk ) {
+       function getScriptsForBottomQueue( $inHead ) {
                global $wgUseSiteJs, $wgAllowUserJs;
-               
+
                // Script and Messages "only" requests marked for bottom inclusion
+               // If we're in the <head>, use load() calls rather than <script src="..."> tags
                // Messages should go first
-               $scripts = $this->makeResourceLoaderLink( $sk, $this->getModuleMessages( true, 'bottom' ), ResourceLoaderModule::TYPE_MESSAGES );
-               $scripts .= $this->makeResourceLoaderLink( $sk, $this->getModuleScripts( true, 'bottom' ), ResourceLoaderModule::TYPE_SCRIPTS );
+               $scripts = $this->makeResourceLoaderLink( $this->getModuleMessages( true, 'bottom' ),
+                       ResourceLoaderModule::TYPE_MESSAGES, /* $useESI = */ false, /* $extraQuery = */ array(),
+                       /* $loadCall = */ $inHead
+               );
+               $scripts .= $this->makeResourceLoaderLink( $this->getModuleScripts( true, 'bottom' ),
+                       ResourceLoaderModule::TYPE_SCRIPTS, /* $useESI = */ false, /* $extraQuery = */ array(),
+                       /* $loadCall = */ $inHead
+               );
 
                // Modules requests - let the client calculate dependencies and batch requests as it likes
                // Only load modules that have marked themselves for loading at the bottom
@@ -2600,21 +2739,21 @@ class OutputPage {
                if ( $modules ) {
                        $scripts .= Html::inlineScript(
                                ResourceLoader::makeLoaderConditionalScript(
-                                       Xml::encodeJsCall( 'mw.loader.load', array( $modules ) ) .
-                                       // the go() call is unnecessary if we inserted top modules, but we don't know for sure that we did
-                                       Xml::encodeJsCall( 'mw.loader.go', array() )
+                                       Xml::encodeJsCall( 'mw.loader.load', array( $modules ) )
                                )
                        );
                }
-               
+
                // Legacy Scripts
                $scripts .= "\n" . $this->mScripts;
 
-               $userScripts = array( 'user.options' );
+               $userScripts = array();
 
                // Add site JS if enabled
                if ( $wgUseSiteJs ) {
-                       $scripts .= $this->makeResourceLoaderLink( $sk, 'site', ResourceLoaderModule::TYPE_SCRIPTS );
+                       $scripts .= $this->makeResourceLoaderLink( 'site', ResourceLoaderModule::TYPE_SCRIPTS,
+                               /* $useESI = */ false, /* $extraQuery = */ array(), /* $loadCall = */ $inHead
+                       );
                        if( $this->getUser()->isLoggedIn() ){
                                $userScripts[] = 'user.groups';
                        }
@@ -2622,81 +2761,187 @@ class OutputPage {
 
                // Add user JS if enabled
                if ( $wgAllowUserJs && $this->getUser()->isLoggedIn() ) {
-                       $action = $this->getRequest()->getVal( 'action', 'view' );
-                       if( $this->getTitle() && $this->getTitle()->isJsSubpage() && $sk->userCanPreview( $action ) ) {
+                       if( $this->getTitle() && $this->getTitle()->isJsSubpage() && $this->userCanPreview() ) {
                                # XXX: additional security check/prompt?
+                               // We're on a preview of a JS subpage
+                               // Exclude this page from the user module in case it's in there (bug 26283)
+                               $scripts .= $this->makeResourceLoaderLink( 'user', ResourceLoaderModule::TYPE_SCRIPTS, false,
+                                       array( 'excludepage' => $this->getTitle()->getPrefixedDBkey() ), $inHead
+                               );
+                               // Load the previewed JS
                                $scripts .= Html::inlineScript( "\n" . $this->getRequest()->getText( 'wpTextbox1' ) . "\n" ) . "\n";
                        } else {
-                               # FIXME: this means that User:Me/Common.js doesn't load when previewing
-                               # User:Me/Vector.js, and vice versa (bug26283)
-                               $userScripts[] = 'user';
+                               // Include the user module normally
+                               // We can't do $userScripts[] = 'user'; because the user module would end up
+                               // being wrapped in a closure, so load it raw like 'site'
+                               $scripts .= $this->makeResourceLoaderLink( 'user', ResourceLoaderModule::TYPE_SCRIPTS,
+                                       /* $useESI = */ false, /* $extraQuery = */ array(), /* $loadCall = */ $inHead
+                               );
                        }
                }
-               $scripts .= $this->makeResourceLoaderLink( $sk, $userScripts, ResourceLoaderModule::TYPE_SCRIPTS );
-               
+               $scripts .= $this->makeResourceLoaderLink( $userScripts, ResourceLoaderModule::TYPE_COMBINED,
+                       /* $useESI = */ false, /* $extraQuery = */ array(), /* $loadCall = */ $inHead
+               );
+
                return $scripts;
        }
 
        /**
-        * Get an array containing global JS variables
-        * 
-        * Do not add things here which can be evaluated in
-        * ResourceLoaderStartupScript - in other words, without state.
-        * You will only be adding bloat to the page and causing page caches to
+        * JS stuff to put at the bottom of the <body>
+        */
+       function getBottomScripts() {
+               global $wgResourceLoaderExperimentalAsyncLoading;
+               if ( !$wgResourceLoaderExperimentalAsyncLoading ) {
+                       return $this->getScriptsForBottomQueue( false );
+               } else {
+                       return '';
+               }
+       }
+
+       /**
+        * Add one or more variables to be set in mw.config in JavaScript.
+        *
+        * @param $key {String|Array} Key or array of key/value pars.
+        * @param $value {Mixed} [optional] Value of the configuration variable.
+        */
+       public function addJsConfigVars( $keys, $value = null ) {
+               if ( is_array( $keys ) ) {
+                       foreach ( $keys as $key => $value ) {
+                               $this->mJsConfigVars[$key] = $value;
+                       }
+                       return;
+               }
+
+               $this->mJsConfigVars[$keys] = $value;
+       }
+
+
+       /**
+        * Get an array containing the variables to be set in mw.config in JavaScript.
+        *
+        * DO NOT CALL THIS FROM OUTSIDE OF THIS CLASS OR Skin::makeGlobalVariablesScript().
+        * This is only public until that function is removed. You have been warned.
+        *
+        * Do not add things here which can be evaluated in ResourceLoaderStartupScript
+        * - in other words, page-independent/site-wide variables (without state).
+        * You will only be adding bloat to the html page and causing page caches to
         * have to be purged on configuration changes.
+        * @return array
         */
-       protected function getJSVars() {
-               global $wgUseAjax, $wgEnableMWSuggest, $wgContLang;
+       public function getJSVars() {
+               global $wgUseAjax, $wgEnableMWSuggest;
+
+               $latestRevID = 0;
+               $pageID = 0;
+               $canonicalName = false; # bug 21115
 
                $title = $this->getTitle();
                $ns = $title->getNamespace();
                $nsname = MWNamespace::exists( $ns ) ? MWNamespace::getCanonicalName( $ns ) : $title->getNsText();
+
                if ( $ns == NS_SPECIAL ) {
                        list( $canonicalName, /*...*/ ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
-               } else {
-                       $canonicalName = false; # bug 21115
+               } elseif ( $this->canUseWikiPage() ) {
+                       $wikiPage = $this->getWikiPage();
+                       $latestRevID = $wikiPage->getLatest();
+                       $pageID = $wikiPage->getId();
                }
 
+               $lang = $title->getPageLanguage();
+
+               // Pre-process information
+               $separatorTransTable = $lang->separatorTransformTable();
+               $separatorTransTable = $separatorTransTable ? $separatorTransTable : array();
+               $compactSeparatorTransTable = array(
+                       implode( "\t", array_keys( $separatorTransTable ) ),
+                       implode( "\t", $separatorTransTable ),
+               );
+               $digitTransTable = $lang->digitTransformTable();
+               $digitTransTable = $digitTransTable ? $digitTransTable : array();
+               $compactDigitTransTable = array(
+                       implode( "\t", array_keys( $digitTransTable ) ),
+                       implode( "\t", $digitTransTable ),
+               );
+
                $vars = array(
                        'wgCanonicalNamespace' => $nsname,
                        'wgCanonicalSpecialPageName' => $canonicalName,
                        'wgNamespaceNumber' => $title->getNamespace(),
                        'wgPageName' => $title->getPrefixedDBKey(),
                        'wgTitle' => $title->getText(),
-                       'wgCurRevisionId' => $title->getLatestRevID(),
-                       'wgArticleId' => $title->getArticleId(),
+                       'wgCurRevisionId' => $latestRevID,
+                       'wgArticleId' => $pageID,
                        'wgIsArticle' => $this->isArticle(),
-                       'wgAction' => $this->getRequest()->getText( 'action', 'view' ),
+                       'wgAction' => Action::getActionName( $this->getContext() ),
                        'wgUserName' => $this->getUser()->isAnon() ? null : $this->getUser()->getName(),
                        'wgUserGroups' => $this->getUser()->getEffectiveGroups(),
                        'wgCategories' => $this->getCategories(),
                        'wgBreakFrames' => $this->getFrameOptions() == 'DENY',
+                       'wgPageContentLanguage' => $lang->getCode(),
+                       'wgSeparatorTransformTable' => $compactSeparatorTransTable,
+                       'wgDigitTransformTable' => $compactDigitTransTable,
                );
-               if ( $wgContLang->hasVariants() ) {
-                       $vars['wgUserVariant'] = $wgContLang->getPreferredVariant();
-               }
+               if ( $lang->hasVariants() ) {
+                       $vars['wgUserVariant'] = $lang->getPreferredVariant();
+               }
                foreach ( $title->getRestrictionTypes() as $type ) {
                        $vars['wgRestriction' . ucfirst( $type )] = $title->getRestrictions( $type );
                }
                if ( $wgUseAjax && $wgEnableMWSuggest && !$this->getUser()->getOption( 'disablesuggest', false ) ) {
                        $vars['wgSearchNamespaces'] = SearchEngine::userNamespaces( $this->getUser() );
                }
-               
-               // Allow extensions to add their custom variables to the global JS variables
-               wfRunHooks( 'MakeGlobalVariablesScript', array( &$vars ) );
-               
-               return $vars;
+               if ( $title->isMainPage() ) {
+                       $vars['wgIsMainPage'] = true;
+               }
+               if ( $this->mRedirectedFrom ) {
+                       $vars['wgRedirectedFrom'] = $this->mRedirectedFrom->getPrefixedDBKey();
+               }
+
+               // Allow extensions to add their custom variables to the mw.config map.
+               // Use the 'ResourceLoaderGetConfigVars' hook if the variable is not
+               // page-dependant but site-wide (without state).
+               // Alternatively, you may want to use OutputPage->addJsConfigVars() instead.
+               wfRunHooks( 'MakeGlobalVariablesScript', array( &$vars, $this ) );
+
+               // Merge in variables from addJsConfigVars last
+               return array_merge( $vars, $this->mJsConfigVars );
        }
 
        /**
+        * To make it harder for someone to slip a user a fake
+        * user-JavaScript or user-CSS preview, a random token
+        * is associated with the login session. If it's not
+        * passed back with the preview request, we won't render
+        * the code.
+        *
+        * @return bool
+        */
+       public function userCanPreview() {
+               if ( $this->getRequest()->getVal( 'action' ) != 'submit'
+                       || !$this->getRequest()->wasPosted()
+                       || !$this->getUser()->matchEditToken(
+                               $this->getRequest()->getVal( 'wpEditToken' ) )
+               ) {
+                       return false;
+               }
+               if ( !$this->getTitle()->isJsSubpage() && !$this->getTitle()->isCssSubpage() ) {
+                       return false;
+               }
+
+               return !count( $this->getTitle()->getUserPermissionsErrors( 'edit', $this->getUser() ) );
+       }
+
+       /**
+        * @param $unused Unused
+        * @param $addContentType bool
+        *
         * @return string HTML tag links to be put in the header.
         */
-       public function getHeadLinks( Skin $sk, $addContentType = false ) {
+       public function getHeadLinks( $unused = null, $addContentType = false ) {
                global $wgUniversalEditButton, $wgFavicon, $wgAppleTouchIcon, $wgEnableAPI,
-                       $wgSitename, $wgVersion, $wgHtml5, $wgMimeType, $wgOutputEncoding,
+                       $wgSitename, $wgVersion, $wgHtml5, $wgMimeType,
                        $wgFeed, $wgOverrideSiteFeed, $wgAdvertisedFeedTypes,
-                       $wgEnableDublinCoreRdf, $wgEnableCreativeCommonsRdf,
-                       $wgDisableLangConversion, $wgCanonicalLanguageLinks, $wgContLang,
+                       $wgDisableLangConversion, $wgCanonicalLanguageLinks,
                        $wgRightsPage, $wgRightsUrl;
 
                $tags = array();
@@ -2705,11 +2950,11 @@ class OutputPage {
                        if ( $wgHtml5 ) {
                                # More succinct than <meta http-equiv=Content-Type>, has the
                                # same effect
-                               $tags[] = Html::element( 'meta', array( 'charset' => $wgOutputEncoding ) );
+                               $tags[] = Html::element( 'meta', array( 'charset' => 'UTF-8' ) );
                        } else {
                                $tags[] = Html::element( 'meta', array(
                                        'http-equiv' => 'Content-Type',
-                                       'content' => "$wgMimeType; charset=$wgOutputEncoding"
+                                       'content' => "$wgMimeType; charset=UTF-8"
                                ) );
                                $tags[] = Html::element( 'meta', array(  // bug 15835
                                        'http-equiv' => 'Content-Style-Type',
@@ -2768,11 +3013,12 @@ class OutputPage {
                }
 
                # Universal edit button
-               if ( $wgUniversalEditButton ) {
-                       if ( $this->isArticleRelated() && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
-                               && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
+               if ( $wgUniversalEditButton && $this->isArticleRelated() ) {
+                       $user = $this->getUser();
+                       if ( $this->getTitle()->quickUserCan( 'edit', $user )
+                               && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create', $user ) ) ) {
                                // Original UniversalEditButton
-                               $msg = wfMsg( 'edit' );
+                               $msg = $this->msg( 'edit' )->text();
                                $tags[] = Html::element( 'link', array(
                                        'rel' => 'alternate',
                                        'type' => 'application/x-wiki',
@@ -2805,7 +3051,7 @@ class OutputPage {
                        'rel' => 'search',
                        'type' => 'application/opensearchdescription+xml',
                        'href' => wfScript( 'opensearch_desc' ),
-                       'title' => wfMsgForContent( 'opensearch-desc' ),
+                       'title' => $this->msg( 'opensearch-desc' )->inContentLanguage()->text(),
                ) );
 
                if ( $wgEnableAPI ) {
@@ -2816,57 +3062,35 @@ class OutputPage {
                        $tags[] = Html::element( 'link', array(
                                'rel' => 'EditURI',
                                'type' => 'application/rsd+xml',
-                               'href' => wfExpandUrl( wfAppendQuery( wfScript( 'api' ), array( 'action' => 'rsd' ) ) ),
+                               // Output a protocol-relative URL here if $wgServer is protocol-relative
+                               // Whether RSD accepts relative or protocol-relative URLs is completely undocumented, though
+                               'href' => wfExpandUrl( wfAppendQuery( wfScript( 'api' ), array( 'action' => 'rsd' ) ), PROTO_RELATIVE ),
                        ) );
                }
 
-               # Metadata links
-               # - Creative Commons
-               #   See http://wiki.creativecommons.org/Extend_Metadata.
-               # - Dublin Core
-               #   Use hreflang to specify canonical and alternate links
-               #   See http://www.google.com/support/webmasters/bin/answer.py?answer=189077
-               if ( $this->isArticleRelated() ) {
-                       # note: buggy CC software only reads first "meta" link
-                       if ( $wgEnableCreativeCommonsRdf ) {
-                               $tags[] = Html::element( 'link', array(
-                                       'rel' => $this->getMetadataAttribute(),
-                                       'title' => 'Creative Commons',
-                                       'type' => 'application/rdf+xml',
-                                       'href' => $this->getTitle()->getLocalURL( 'action=creativecommons' ) )
-                               );
-                       }
-
-                       if ( $wgEnableDublinCoreRdf ) {
-                               $tags[] = Html::element( 'link', array(
-                                       'rel' => $this->getMetadataAttribute(),
-                                       'title' => 'Dublin Core',
-                                       'type' => 'application/rdf+xml',
-                                       'href' => $this->getTitle()->getLocalURL( 'action=dublincore' ) )
-                               );
-                       }
-               }
 
                # Language variants
-               if ( !$wgDisableLangConversion && $wgCanonicalLanguageLinks
-                       && $wgContLang->hasVariants() ) {
-
-                       $urlvar = $wgContLang->getURLVariant();
-
-                       if ( !$urlvar ) {
-                               $variants = $wgContLang->getVariants();
-                               foreach ( $variants as $_v ) {
+               if ( !$wgDisableLangConversion && $wgCanonicalLanguageLinks ) {
+                       $lang = $this->getTitle()->getPageLanguage();
+                       if ( $lang->hasVariants() ) {
+
+                               $urlvar = $lang->getURLVariant();
+
+                               if ( !$urlvar ) {
+                                       $variants = $lang->getVariants();
+                                       foreach ( $variants as $_v ) {
+                                               $tags[] = Html::element( 'link', array(
+                                                       'rel' => 'alternate',
+                                                       'hreflang' => $_v,
+                                                       'href' => $this->getTitle()->getLocalURL( array( 'variant' => $_v ) ) )
+                                               );
+                                       }
+                               } else {
                                        $tags[] = Html::element( 'link', array(
-                                               'rel' => 'alternate',
-                                               'hreflang' => $_v,
-                                               'href' => $this->getTitle()->getLocalURL( '', $_v ) )
-                                       );
+                                               'rel' => 'canonical',
+                                               'href' => $this->getTitle()->getCanonicalUrl()
+                                       ) );
                                }
-                       } else {
-                               $tags[] = Html::element( 'link', array(
-                                       'rel' => 'canonical',
-                                       'href' => $this->getTitle()->getFullURL() )
-                               );
                        }
                }
 
@@ -2894,16 +3118,16 @@ class OutputPage {
                # Feeds
                if ( $wgFeed ) {
                        foreach( $this->getSyndicationLinks() as $format => $link ) {
-                               # Use the page name for the title (accessed through $wgTitle since
-                               # there's no other way).  In principle, this could lead to issues
-                               # with having the same name for different feeds corresponding to
-                               # the same page, but we can't avoid that at this low a level.
+                               # Use the page name for the title.  In principle, this could
+                               # lead to issues with having the same name for different feeds
+                               # corresponding to the same page, but we can't avoid that at
+                               # this low a level.
 
                                $tags[] = $this->feedLink(
                                        $format,
                                        $link,
                                        # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
-                                       wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() )
+                                       $this->msg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() )->text()
                                );
                        }
 
@@ -2914,23 +3138,22 @@ class OutputPage {
                        # like to promote instead of the RC feed (maybe like a "Recent New Articles"
                        # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
                        # If so, use it instead.
-
-                       $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
-
                        if ( $wgOverrideSiteFeed ) {
                                foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
+                                       // Note, this->feedLink escapes the url.
                                        $tags[] = $this->feedLink(
                                                $type,
-                                               htmlspecialchars( $feedUrl ),
-                                               wfMsg( "site-{$type}-feed", $wgSitename )
+                                               $feedUrl,
+                                               $this->msg( "site-{$type}-feed", $wgSitename )->text()
                                        );
                                }
-                       } elseif ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
+                       } elseif ( !$this->getTitle()->isSpecial( 'Recentchanges' ) ) {
+                               $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
                                foreach ( $wgAdvertisedFeedTypes as $format ) {
                                        $tags[] = $this->feedLink(
                                                $format,
                                                $rctitle->getLocalURL( "feed={$format}" ),
-                                               wfMsg( "site-{$format}-feed", $wgSitename ) # For grep: 'site-rss-feed', 'site-atom-feed'.
+                                               $this->msg( "site-{$format}-feed", $wgSitename )->text() # For grep: 'site-rss-feed', 'site-atom-feed'.
                                        );
                                }
                        }
@@ -2983,24 +3206,79 @@ class OutputPage {
        /**
         * Adds inline CSS styles
         * @param $style_css Mixed: inline CSS
+        * @param $flip String: Set to 'flip' to flip the CSS if needed
         */
-       public function addInlineStyle( $style_css ){
+       public function addInlineStyle( $style_css, $flip = 'noflip' ) {
+               if( $flip === 'flip' && $this->getLanguage()->isRTL() ) {
+                       # If wanted, and the interface is right-to-left, flip the CSS
+                       $style_css = CSSJanus::transform( $style_css, true, false );
+               }
                $this->mInlineStyles .= Html::inlineStyle( $style_css );
        }
 
        /**
         * Build a set of <link>s for the stylesheets specified in the $this->styles array.
         * These will be applied to various media & IE conditionals.
-        * @param $sk Skin object
+        *
+        * @return string
         */
-       public function buildCssLinks( $sk ) {
-               $ret = '';
+       public function buildCssLinks() {
+               global $wgUseSiteCss, $wgAllowUserCss, $wgAllowUserCssPrefs,
+                       $wgLang, $wgContLang;
+
+               $this->getSkin()->setupSkinUserCss( $this );
+
                // Add ResourceLoader styles
                // Split the styles into four groups
                $styles = array( 'other' => array(), 'user' => array(), 'site' => array(), 'private' => array(), 'noscript' => array() );
+               $otherTags = ''; // Tags to append after the normal <link> tags
                $resourceLoader = $this->getResourceLoader();
-               foreach ( $this->getModuleStyles() as $name ) {
-                       $group = $resourceLoader->getModule( $name )->getGroup();
+
+               $moduleStyles = $this->getModuleStyles();
+
+               // Per-site custom styles
+               if ( $wgUseSiteCss ) {
+                       $moduleStyles[] = 'site';
+                       $moduleStyles[] = 'noscript';
+                       if( $this->getUser()->isLoggedIn() ){
+                               $moduleStyles[] = 'user.groups';
+                       }
+               }
+
+               // Per-user custom styles
+               if ( $wgAllowUserCss ) {
+                       if ( $this->getTitle()->isCssSubpage() && $this->userCanPreview() ) {
+                               // We're on a preview of a CSS subpage
+                               // Exclude this page from the user module in case it's in there (bug 26283)
+                               $otherTags .= $this->makeResourceLoaderLink( 'user', ResourceLoaderModule::TYPE_STYLES, false,
+                                       array( 'excludepage' => $this->getTitle()->getPrefixedDBkey() )
+                               );
+                               
+                               // Load the previewed CSS
+                               // If needed, Janus it first. This is user-supplied CSS, so it's
+                               // assumed to be right for the content language directionality.
+                               $previewedCSS = $this->getRequest()->getText( 'wpTextbox1' );
+                               if ( $wgLang->getDir() !== $wgContLang->getDir() ) {
+                                       $previewedCSS = CSSJanus::transform( $previewedCSS, true, false );
+                               }
+                               $otherTags .= Html::inlineStyle( $previewedCSS );
+                       } else {
+                               // Load the user styles normally
+                               $moduleStyles[] = 'user';
+                       }
+               }
+
+               // Per-user preference styles
+               if ( $wgAllowUserCssPrefs ) {
+                       $moduleStyles[] = 'user.cssprefs';
+               }
+
+               foreach ( $moduleStyles as $name ) {
+                       $module = $resourceLoader->getModule( $name );
+                       if ( !$module ) {
+                               continue;
+                       }
+                       $group = $module->getGroup();
                        // Modules in groups named "other" or anything different than "user", "site" or "private"
                        // will be placed in the "other" group
                        $styles[isset( $styles[$group] ) ? $group : 'other'][] = $name;
@@ -3010,26 +3288,39 @@ class OutputPage {
                // dynamically added styles to override statically added styles from other modules. So the order
                // has to be other, dynamic, site, private, user
                // Add statically added styles for other modules
-               $ret .= $this->makeResourceLoaderLink( $sk, $styles['other'], ResourceLoaderModule::TYPE_STYLES );
+               $ret = $this->makeResourceLoaderLink( $styles['other'], ResourceLoaderModule::TYPE_STYLES );
                // Add normal styles added through addStyle()/addInlineStyle() here
                $ret .= implode( "\n", $this->buildCssLinksArray() ) . $this->mInlineStyles;
                // Add marker tag to mark the place where the client-side loader should inject dynamic styles
                // We use a <meta> tag with a made-up name for this because that's valid HTML
                $ret .= Html::element( 'meta', array( 'name' => 'ResourceLoaderDynamicStyles', 'content' => '' ) ) . "\n";
-               
+
                // Add site, private and user styles
                // 'private' at present only contains user.options, so put that before 'user'
                // Any future private modules will likely have a similar user-specific character
                foreach ( array( 'site', 'noscript', 'private', 'user' ) as $group ) {
-                       $ret .= $this->makeResourceLoaderLink( $sk, $styles[$group],
+                       $ret .= $this->makeResourceLoaderLink( $styles[$group],
                                        ResourceLoaderModule::TYPE_STYLES
                        );
                }
+
+               // Add stuff in $otherTags (previewed user CSS if applicable)
+               $ret .= $otherTags;
                return $ret;
        }
 
+       /**
+        * @return Array
+        */
        public function buildCssLinksArray() {
                $links = array();
+
+               // Add any extension CSS
+               foreach ( $this->mExtStyles as $url ) {
+                       $this->addStyle( $url );
+               }
+               $this->mExtStyles = array();
+
                foreach( $this->styles as $file => $options ) {
                        $link = $this->styleLink( $file, $options );
                        if( $link ) {
@@ -3049,8 +3340,7 @@ class OutputPage {
         */
        protected function styleLink( $style, $options ) {
                if( isset( $options['dir'] ) ) {
-                       $siteDir = wfUILang()->getDir();
-                       if( $siteDir != $options['dir'] ) {
+                       if( $this->getLanguage()->getDir() != $options['dir'] ) {
                                return '';
                        }
                }
@@ -3138,12 +3428,11 @@ class OutputPage {
         * Like addWikiMsg() except the parameters are taken as an array
         * instead of a variable argument list.
         *
-        * $options is passed through to wfMsgExt(), see that function for details.
+        * @param $name string
+        * @param $args array
         */
-       public function addWikiMsgArray( $name, $args, $options = array() ) {
-               $options[] = 'parse';
-               $text = wfMsgExt( $name, $options, $args );
-               $this->addHTML( $text );
+       public function addWikiMsgArray( $name, $args ) {
+               $this->addWikiText( $this->msg( $name, $args )->plain() );
        }
 
        /**
@@ -3169,6 +3458,8 @@ class OutputPage {
         *    $wgOut->addWikiText( "<div class='error'>\n" . wfMsgNoTrans( 'some-error' ) . "\n</div>" );
         *
         * The newline after opening div is needed in some wikitext. See bug 19226.
+        *
+        * @param $wrap string
         */
        public function wrapWikiMsg( $wrap /*, ...*/ ) {
                $msgSpecs = func_get_args();