Made loadFromFileCache() always disable $wgOut regardless of whether compression...
[lhc/web/wiklou.git] / includes / OutputPage.php
index 6ea70b9..9723690 100644 (file)
@@ -13,7 +13,7 @@ if ( !defined( 'MEDIAWIKI' ) ) {
  *
  * @todo FIXME: Another class handles sending the whole page to the client.
  *
- * Some comments comes from a pairing session between Zak Greant and Ashar Voultoiz
+ * Some comments comes from a pairing session between Zak Greant and Antoine Musso
  * in November 2010.
  *
  * @todo document
@@ -67,7 +67,7 @@ class OutputPage extends ContextSource {
         * 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;
@@ -152,7 +152,10 @@ class OutputPage extends ContextSource {
        // Parser related.
        var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
 
-       /// lazy initialised, use parserOptions()
+       /**
+        * lazy initialised, use parserOptions()
+        * @var ParserOptions
+        */
        protected $mParserOptions = null;
 
        /**
@@ -194,6 +197,7 @@ class OutputPage extends ContextSource {
 
        /// should be private. To include the variable {{REVISIONID}}
        var $mRevisionId = null;
+       private $mRevisionTimestamp = null;
 
        var $mFileVersion = null;
 
@@ -219,6 +223,14 @@ class OutputPage extends ContextSource {
                '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
@@ -757,7 +769,11 @@ class OutputPage extends ContextSource {
         * @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;
+               }
        }
 
        /**
@@ -769,22 +785,35 @@ class OutputPage extends ContextSource {
                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
+        * @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 ) ) );
        }
 
        /**
@@ -809,19 +838,54 @@ class OutputPage extends ContextSource {
        /**
         * Replace the subtile with $str
         *
-        * @param $str String: new value of the subtitle
+        * @param $str String|Message: new value of the subtitle
         */
        public function setSubtitle( $str ) {
-               $this->mSubtitle = /*$this->parse(*/ $str /*)*/; // @bug 2514
+               $this->clearSubtitle();
+               $this->addSubtitle( $str );
        }
 
        /**
         * Add $str to the subtitle
         *
-        * @param $str String to add to the subtitle
+        * @deprecated in 1.19; use addSubtitle() instead
+        * @param $str String|Message to add to the subtitle
         */
        public function appendSubtitle( $str ) {
-               $this->mSubtitle .= /*$this->parse(*/ $str /*)*/; // @bug 2514
+               $this->addSubtitle( $str );
+       }
+
+       /**
+        * Add $str to the subtitle
+        *
+        * @param $str String|Message to add to the subtitle
+        */
+       public function addSubtitle( $str ) {
+               if ( $str instanceof Message ) {
+                       $this->mSubtitle[] = $str->setContext( $this->getContext() )->parse();
+               } else {
+                       $this->mSubtitle[] = $str;
+               }
+       }
+
+       /**
+        * Add a subtitle containing a backlink to a page
+        *
+        * @param $title Title to link to
+        */
+       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 ) ) );
+       }
+
+       /**
+        * Clear the subtitles
+        */
+       public function clearSubtitle() {
+               $this->mSubtitle = array();
        }
 
        /**
@@ -830,7 +894,7 @@ class OutputPage extends ContextSource {
         * @return String
         */
        public function getSubtitle() {
-               return $this->mSubtitle;
+               return implode( "<br />\n\t\t\t\t", $this->mSubtitle );
        }
 
        /**
@@ -1011,7 +1075,7 @@ class OutputPage extends ContextSource {
        /**
         * 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 ) {
@@ -1021,7 +1085,7 @@ class OutputPage extends ContextSource {
        /**
         * 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 ) {
@@ -1144,9 +1208,11 @@ class OutputPage extends ContextSource {
         * 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.
+        *     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;
        }
 
@@ -1202,6 +1268,19 @@ class OutputPage extends ContextSource {
                $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
         */
@@ -1236,7 +1315,7 @@ class OutputPage extends ContextSource {
         */
        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 );
@@ -1263,10 +1342,31 @@ class OutputPage extends ContextSource {
                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|false
+        * @param $file File|bool
         * @return Mixed: previous value
         */
        public function setFileVersion( $file ) {
@@ -1367,8 +1467,6 @@ class OutputPage extends ContextSource {
 
                wfProfileIn( __METHOD__ );
 
-               wfIncrStats( 'pcache_not_possible' );
-
                $popts = $this->parserOptions();
                $oldTidy = $popts->setTidy( $tidy );
                $popts->setInterfaceMessage( (bool) $interface );
@@ -1616,7 +1714,7 @@ class OutputPage extends ContextSource {
                                $this->mVaryHeader[$header] = $option;
                        }
                }
-               $this->mVaryHeader[$header] = array_unique( $this->mVaryHeader[$header] );
+               $this->mVaryHeader[$header] = array_unique( (array)$this->mVaryHeader[$header] );
        }
 
        /**
@@ -1717,6 +1815,7 @@ class OutputPage extends ContextSource {
                } elseif ( $this->mPreventClickjacking && $wgEditPageFrameOptions ) {
                        return $wgEditPageFrameOptions;
                }
+               return false;
        }
 
        /**
@@ -1806,7 +1905,7 @@ class OutputPage extends ContextSource {
         * the object, let's actually output it:
         */
        public function output() {
-               global $wgLanguageCode, $wgDebugRedirects, $wgMimeType;
+               global $wgLanguageCode, $wgDebugRedirects, $wgMimeType, $wgVaryOnXFP;
 
                if( $this->mDoNothing ) {
                        return;
@@ -1819,24 +1918,34 @@ class OutputPage extends ContextSource {
                if ( $this->mRedirect != '' ) {
                        # Standards require redirect URLs to be absolute
                        $this->mRedirect = wfExpandUrl( $this->mRedirect, PROTO_CURRENT );
-                       if( $this->mRedirectCode == '301' || $this->mRedirectCode == '303' ) {
-                               if( !$wgDebugRedirects ) {
-                                       $message = HttpStatus::getMessage( $this->mRedirectCode );
-                                       $response->header( "HTTP/1.1 {$this->mRedirectCode} $message" );
+
+                       $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 ) {
@@ -1896,6 +2005,33 @@ class OutputPage extends ContextSource {
                throw new UserBlockedError( $this->getUser()->mBlock );
        }
 
+       /**
+        * 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 $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 prepareErrorPage( $pageTitle, $htmlTitle = false ) {
+               if ( $this->getTitle() ) {
+                       $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
+               }
+
+               $this->setPageTitle( $pageTitle );
+               if ( $htmlTitle !== false ) {
+                       $this->setHTMLTitle( $htmlTitle );
+               }
+               $this->setRobotPolicy( 'noindex,nofollow' );
+               $this->setArticleRelated( false );
+               $this->enableClientCache( false );
+               $this->mRedirect = '';
+               $this->clearSubtitle();
+               $this->clearHTML();
+       }
+
        /**
         * Output a standard error page
         *
@@ -1907,16 +2043,7 @@ class OutputPage extends ContextSource {
         * @param $params Array: message parameters; ignored if $msg is a Message object
         */
        public function showErrorPage( $title, $msg, $params = array() ) {
-               if ( $this->getTitle() ) {
-                       $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
-               }
-               $this->setPageTitle( wfMsg( $title ) );
-               $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
-               $this->setRobotPolicy( 'noindex,nofollow' );
-               $this->setArticleRelated( false );
-               $this->enableClientCache( false );
-               $this->mRedirect = '';
-               $this->mBodytext = '';
+               $this->prepareErrorPage( $this->msg( $title ), $this->msg( 'errorpagetitle' ) );
 
                if ( $msg instanceof Message ){
                        $this->addHTML( $msg->parse() );
@@ -1934,16 +2061,71 @@ class OutputPage extends ContextSource {
         * @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 ) );
+               }
        }
 
        /**
@@ -1953,11 +2135,7 @@ class OutputPage extends ContextSource {
         * @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();
@@ -1974,33 +2152,11 @@ class OutputPage extends ContextSource {
 
        /**
         * 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 = Linker::linkKnown(
-                       $loginTitle,
-                       wfMsgHtml( 'loginreqlink' ),
-                       array(),
-                       array( 'returnto' => $this->getTitle()->getPrefixedText() )
-               );
-               $this->addHTML( wfMessage( 'loginreqpagetext' )->rawParams( $loginLink )->parse() .
-                       "\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' );
        }
 
        /**
@@ -2012,14 +2168,14 @@ class OutputPage extends ContextSource {
         */
        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 ) {
@@ -2027,13 +2183,13 @@ class OutputPage extends ContextSource {
 
                        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>";
                }
 
@@ -2061,8 +2217,6 @@ class OutputPage extends ContextSource {
         * @param $action    String: action that was denied or null if unknown
         */
        public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
-               global $wgEnableInterwikiTranscluding, $wgEnableInterwikiTemplatesTracking;
-
                $this->setRobotPolicy( 'noindex,nofollow' );
                $this->setArticleRelated( false );
 
@@ -2075,12 +2229,10 @@ class OutputPage extends ContextSource {
                if ( !empty( $reasons ) ) {
                        // Permissions error
                        if( $source ) {
-                               $this->setPageTitle( wfMsg( 'viewsource' ) );
-                               $this->setSubtitle(
-                                       wfMsg( 'viewsourcefor', Linker::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 {
@@ -2099,25 +2251,17 @@ class OutputPage extends ContextSource {
                                'cols' => $this->getUser()->getOption( 'cols' ),
                                'rows' => $this->getUser()->getOption( 'rows' ),
                                'readonly' => 'readonly',
-                               'lang' => $pageLang->getCode(),
+                               'lang' => $pageLang->getHtmlCode(),
                                'dir' => $pageLang->getDir(),
                        );
                        $this->addHTML( Html::element( 'textarea', $params, $source ) );
 
                        // Show templates used by this article
-                       $article = new Article( $this->getTitle() );
-                       $templates = Linker::formatTemplates( $article->getUsedTemplates() );
+                       $templates = Linker::formatTemplates( $this->getTitle()->getTemplateLinksFrom() );
                        $this->addHTML( "<div class='templatesUsed'>
 $templates
 </div>
 " );
-                       if ( $wgEnableInterwikiTranscluding && $wgEnableInterwikiTemplatesTracking ) {
-                               $distantTemplates = Linker::formatDistantTemplates( $article->getUsedDistantTemplates() );
-                               $this->addHTML( "<div class='distantTemplatesUsed'>
-$distantTemplates
-</div>
-" );
-                       }
                }
 
                # If the title doesn't exist, it's fairly pointless to print a return
@@ -2152,37 +2296,34 @@ $distantTemplates
                                ? '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() );
        }
 
        /**
@@ -2194,10 +2335,8 @@ $distantTemplates
         */
        public function addReturnTo( $title, $query = array(), $text = null ) {
                $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullURL() ) );
-               $link = wfMsgHtml(
-                       'returnto',
-                       Linker::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" );
        }
 
@@ -2240,18 +2379,19 @@ $distantTemplates
         * @return String: The doctype, opening <html>, and head element.
         */
        public function headElement( Skin $sk, $includeStyle = true ) {
-               global $wgContLang, $wgUseTrackbacks;
-               $userdir = $this->getLang()->getDir();
+               global $wgContLang;
+
+               $userdir = $this->getLanguage()->getDir();
                $sitedir = $wgContLang->getDir();
 
                if ( $sk->commonPrintStylesheet() ) {
                        $this->addModuleStyles( 'mediawiki.legacy.wikiprintable' );
                }
 
-               $ret = Html::htmlHeader( array( 'lang' => $this->getLang()->getCode(), 'dir' => $userdir, 'class' => 'client-nojs' ) );
+               $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' );
@@ -2269,10 +2409,6 @@ $distantTemplates
                        $this->getHeadItems()
                ) );
 
-               if ( $wgUseTrackbacks && $this->isArticleRelated() ) {
-                       $ret .= $this->getTitle()->trackbackRDF();
-               }
-
                $closeHead = Html::closeElement( 'head' );
                if ( $closeHead ) {
                        $ret .= "$closeHead\n";
@@ -2283,12 +2419,13 @@ $distantTemplates
                # 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 ) );
@@ -2302,12 +2439,12 @@ $distantTemplates
         * 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( array(
                        'mediawiki.user',
-                       'mediawiki.util',
                        'mediawiki.page.startup',
                        'mediawiki.page.ready',
                ) );
@@ -2315,6 +2452,12 @@ $distantTemplates
                        $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' );
@@ -2358,11 +2501,11 @@ $distantTemplates
         * @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( $modules, $only, $useESI = false, array $extraQuery = array() ) {
-               global $wgLoadScript, $wgResourceLoaderUseESI,
-                       $wgResourceLoaderInlinePrivateModules;
+       protected function makeResourceLoaderLink( $modules, $only, $useESI = false, array $extraQuery = array(), $loadCall = false ) {
+               global $wgResourceLoaderUseESI, $wgResourceLoaderInlinePrivateModules;
 
                if ( !count( $modules ) ) {
                        return '';
@@ -2390,7 +2533,8 @@ $distantTemplates
                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 )
@@ -2418,7 +2562,7 @@ $distantTemplates
                        // correct timestamp and emptiness data
                        $query = ResourceLoader::makeLoaderQuery(
                                array(), // modules; not determined yet
-                               $this->getContext()->getLang()->getCode(),
+                               $this->getLanguage()->getCode(),
                                $this->getSkin()->getSkinName(),
                                $user,
                                null, // version; not determined yet
@@ -2440,7 +2584,9 @@ $distantTemplates
                                continue;
                        }
 
-                       // 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(
@@ -2471,10 +2617,10 @@ $distantTemplates
                                // Add a version parameter so cache will break when things change
                                $version = wfTimestamp( TS_ISO_8601_BASIC, $timestamp );
                        }
-                       
+
                        $url = ResourceLoader::makeLoaderURL(
                                array_keys( $modules ),
-                               $this->getContext()->getLang()->getCode(),
+                               $this->getLanguage()->getCode(),
                                $this->getSkin()->getSkinName(),
                                $user,
                                $version,
@@ -2495,6 +2641,12 @@ $distantTemplates
                                // Automatically select style/script elements
                                if ( $only === ResourceLoaderModule::TYPE_STYLES ) {
                                        $link = Html::linkedStyle( $url );
+                               } else if ( $loadCall ) { 
+                                       $link = Html::inlineScript(
+                                               ResourceLoader::makeLoaderConditionalScript(
+                                                       Xml::encodeJsCall( 'mw.loader.load', array( $url ) )
+                                               )
+                                       );
                                } else {
                                        $link = Html::linkedScript( $url );
                                }
@@ -2516,6 +2668,8 @@ $distantTemplates
         * @return String: HTML fragment
         */
        function getHeadScripts() {
+               global $wgResourceLoaderExperimentalAsyncLoading;
+               
                // Startup - this will immediately load jquery and mediawiki modules
                $scripts = $this->makeResourceLoaderLink( 'startup', ResourceLoaderModule::TYPE_SCRIPTS, true );
 
@@ -2526,6 +2680,12 @@ $distantTemplates
                        )
                );
 
+               // 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( $this->getModuleMessages( true, 'top' ), ResourceLoaderModule::TYPE_MESSAGES );
@@ -2537,27 +2697,41 @@ $distantTemplates
                if ( $modules ) {
                        $scripts .= Html::inlineScript(
                                ResourceLoader::makeLoaderConditionalScript(
-                                       Xml::encodeJsCall( 'mw.loader.load', array( $modules ) )
+                                       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() {
+       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( $this->getModuleMessages( true, 'bottom' ), ResourceLoaderModule::TYPE_MESSAGES );
-               $scripts .= $this->makeResourceLoaderLink( $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
@@ -2573,11 +2747,13 @@ $distantTemplates
                // Legacy Scripts
                $scripts .= "\n" . $this->mScripts;
 
-               $userScripts = array( 'user.options', 'user.tokens' );
+               $userScripts = array();
 
                // Add site JS if enabled
                if ( $wgUseSiteJs ) {
-                       $scripts .= $this->makeResourceLoaderLink( 'site', ResourceLoaderModule::TYPE_SCRIPTS );
+                       $scripts .= $this->makeResourceLoaderLink( 'site', ResourceLoaderModule::TYPE_SCRIPTS,
+                               /* $useESI = */ false, /* $extraQuery = */ array(), /* $loadCall = */ $inHead
+                       );
                        if( $this->getUser()->isLoggedIn() ){
                                $userScripts[] = 'user.groups';
                        }
@@ -2590,7 +2766,7 @@ $distantTemplates
                                // 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() )
+                                       array( 'excludepage' => $this->getTitle()->getPrefixedDBkey() ), $inHead
                                );
                                // Load the previewed JS
                                $scripts .= Html::inlineScript( "\n" . $this->getRequest()->getText( 'wpTextbox1' ) . "\n" ) . "\n";
@@ -2598,21 +2774,37 @@ $distantTemplates
                                // 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 );
+                               $scripts .= $this->makeResourceLoaderLink( 'user', ResourceLoaderModule::TYPE_SCRIPTS,
+                                       /* $useESI = */ false, /* $extraQuery = */ array(), /* $loadCall = */ $inHead
+                               );
                        }
                }
-               $scripts .= $this->makeResourceLoaderLink( $userScripts, ResourceLoaderModule::TYPE_COMBINED );
+               $scripts .= $this->makeResourceLoaderLink( $userScripts, ResourceLoaderModule::TYPE_COMBINED,
+                       /* $useESI = */ false, /* $extraQuery = */ array(), /* $loadCall = */ $inHead
+               );
 
                return $scripts;
        }
 
+       /**
+        * 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} Value of the configuration variable.
+        * @param $value {Mixed} [optional] Value of the configuration variable.
         */
-       public function addJsConfigVars( $keys, $value ) {
+       public function addJsConfigVars( $keys, $value = null ) {
                if ( is_array( $keys ) ) {
                        foreach ( $keys as $key => $value ) {
                                $this->mJsConfigVars[$key] = $value;
@@ -2627,39 +2819,68 @@ $distantTemplates
        /**
         * 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-indendent/site-wide variables (without state).
+        * - 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() {
+       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,
                );
-               $lang = $this->getTitle()->getPageLanguage();
                if ( $lang->hasVariants() ) {
                        $vars['wgUserVariant'] = $lang->getPreferredVariant();
                }
@@ -2672,12 +2893,15 @@ $distantTemplates
                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 ) );
+               wfRunHooks( 'MakeGlobalVariablesScript', array( &$vars, $this ) );
 
                // Merge in variables from addJsConfigVars last
                return array_merge( $vars, $this->mJsConfigVars );
@@ -2789,11 +3013,12 @@ $distantTemplates
                }
 
                # 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',
@@ -2826,7 +3051,7 @@ $distantTemplates
                        'rel' => 'search',
                        'type' => 'application/opensearchdescription+xml',
                        'href' => wfScript( 'opensearch_desc' ),
-                       'title' => wfMsgForContent( 'opensearch-desc' ),
+                       'title' => $this->msg( 'opensearch-desc' )->inContentLanguage()->text(),
                ) );
 
                if ( $wgEnableAPI ) {
@@ -2843,28 +3068,29 @@ $distantTemplates
                        ) );
                }
 
-               $lang = $this->getTitle()->getPageLanguage();
 
                # Language variants
-               if ( !$wgDisableLangConversion && $wgCanonicalLanguageLinks
-                       && $lang->hasVariants() ) {
-
-                       $urlvar = $lang->getURLVariant();
-
-                       if ( !$urlvar ) {
-                               $variants = $lang->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()->getCanonicalUrl()
-                               ) );
                        }
                }
 
@@ -2901,7 +3127,7 @@ $distantTemplates
                                        $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()
                                );
                        }
 
@@ -2912,24 +3138,22 @@ $distantTemplates
                        # 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,
                                                $feedUrl,
-                                               wfMsg( "site-{$type}-feed", $wgSitename )
+                                               $this->msg( "site-{$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'.
                                        );
                                }
                        }
@@ -2985,7 +3209,7 @@ $distantTemplates
         * @param $flip String: Set to 'flip' to flip the CSS if needed
         */
        public function addInlineStyle( $style_css, $flip = 'noflip' ) {
-               if( $flip === 'flip' && $this->getLang()->isRTL() ) {
+               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 );
                }
@@ -2999,7 +3223,8 @@ $distantTemplates
         * @return string
         */
        public function buildCssLinks() {
-               global $wgUseSiteCss, $wgAllowUserCss, $wgAllowUserCssPrefs;
+               global $wgUseSiteCss, $wgAllowUserCss, $wgAllowUserCssPrefs,
+                       $wgLang, $wgContLang;
 
                $this->getSkin()->setupSkinUserCss( $this );
 
@@ -3028,8 +3253,15 @@ $distantTemplates
                                $otherTags .= $this->makeResourceLoaderLink( 'user', ResourceLoaderModule::TYPE_STYLES, false,
                                        array( 'excludepage' => $this->getTitle()->getPrefixedDBkey() )
                                );
+                               
                                // Load the previewed CSS
-                               $otherTags .= Html::inlineStyle( $this->getRequest()->getText( 'wpTextbox1' ) );
+                               // 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';
@@ -3038,11 +3270,15 @@ $distantTemplates
 
                // Per-user preference styles
                if ( $wgAllowUserCssPrefs ) {
-                       $moduleStyles[] = 'user.options';
+                       $moduleStyles[] = 'user.cssprefs';
                }
 
                foreach ( $moduleStyles as $name ) {
-                       $group = $resourceLoader->getModule( $name )->getGroup();
+                       $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;
@@ -3104,7 +3340,7 @@ $distantTemplates
         */
        protected function styleLink( $style, $options ) {
                if( isset( $options['dir'] ) ) {
-                       if( $this->getLang()->getDir() != $options['dir'] ) {
+                       if( $this->getLanguage()->getDir() != $options['dir'] ) {
                                return '';
                        }
                }
@@ -3192,16 +3428,11 @@ $distantTemplates
         * 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
-        * @param $options 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() );
        }
 
        /**