Implement the RequestContext class. Some credit to IAlex, ;) other credit for me...
[lhc/web/wiklou.git] / includes / OutputPage.php
index 4471d77..60057b5 100644 (file)
@@ -5,16 +5,16 @@ if ( !defined( 'MEDIAWIKI' ) ) {
 
 /**
  * This class should be covered by a general architecture document which does
- * not exist as of january 2011.  This is one of the Core class and should
+ * not exist as of January 2011.  This is one of the Core classes and should
  * be read at least once by any new developers.
  *
  * 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) handle sending the whole page to the client.
+ * Another class (fixme) handles sending the whole page to the client.
  * 
  * Some comments comes from a pairing session between Zak Greant and Ashar Voultoiz
- * in november 2010.
+ * in November 2010.
  *
  * @todo document
  */
@@ -37,7 +37,7 @@ class OutputPage {
        var $mBodytext = '';
 
        /**
-        * Holds the debug lines that will be outputted as comments in page source if
+        * Holds the debug lines that will be output as comments in page source if
         * $wgDebugComments is enabled. See also $wgShowDebug.
         * TODO: make a getter method for this
         */
@@ -68,7 +68,7 @@ class OutputPage {
 
        /**
         * mLastModified and mEtag are used for sending cache control.
-        * The whole caching system should probably be moved in its own class.
+        * The whole caching system should probably be moved into its own class.
         */
        var $mLastModified = '';
 
@@ -76,8 +76,8 @@ class OutputPage {
         * Should be private. No getter but used in sendCacheControl();
         * Contains an HTTP Entity Tags (see RFC 2616 section 3.13) which is used
         * as a unique identifier for the content. It is later used by the client
-        * to compare its cache version with the server version. Client sends
-        * headers If-Match and If-None-Match containing its local cache ETAG value.
+        * 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
         * is properly described in RFC 2616 : http://tools.ietf.org/html/rfc2616
@@ -123,6 +123,7 @@ class OutputPage {
        var $mInlineMsg = array();
 
        var $mTemplateIds = array();
+       var $mImageTimeKeys = array();
 
        # What level of 'untrustworthiness' is allowed in CSS/JS modules loaded on this page?
        # @see ResourceLoaderModule::$origin
@@ -192,6 +193,9 @@ class OutputPage {
        /// Stores a Title object (of the current page).
        protected $mTitle = null;
 
+       /// Stores a User object (the one the page is being rendered for)
+       protected $mUser = null;
+
        /**
         * An array of stylesheet filenames (relative from skins path), with options
         * for CSS media, IE conditions, and RTL/LTR direction.
@@ -285,11 +289,24 @@ class OutputPage {
         *                 "rel" attribute will be automatically added
         */
        function addMetadataLink( $linkarr ) {
+               $linkarr['rel'] = $this->getMetadataAttribute();
+               $this->addLink( $linkarr );
+       }
+
+       /**
+        * Get the value of the "rel" attribute for metadata links
+        *
+        * @return String
+        */
+       private function getMetadataAttribute() {
                # note: buggy CC software only reads first "meta" link
                static $haveMeta = false;
-               $linkarr['rel'] = $haveMeta ? 'alternate meta' : 'meta';
-               $this->addLink( $linkarr );
-               $haveMeta = true;
+               if ( $haveMeta ) {
+                       return 'alternate meta';
+               } else {
+                       $haveMeta = true;
+                       return 'meta';
+               }
        }
 
        /**
@@ -361,7 +378,8 @@ class OutputPage {
        }
 
        /**
-        * Filter an array of modules to remove insufficiently trustworthy members
+        * Filter an array of modules to remove insufficiently trustworthy members, and modules
+        * which are no longer registered (eg a page is cached before an extension is disabled)
         * @param $modules Array
         * @return Array
         */
@@ -370,7 +388,9 @@ class OutputPage {
                $filteredModules = array();
                foreach( $modules as $val ){
                        $module = $resourceLoader->getModule( $val );
-                       if( $module->getOrigin() <= $this->getAllowedModules( $type ) ) {
+                       if( $module instanceof ResourceLoaderModule
+                               && $module->getOrigin() <= $this->getAllowedModules( $type ) )
+                       {
                                $filteredModules[] = $val;
                        }
                }
@@ -532,7 +552,7 @@ class OutputPage {
         * @return Boolean: true iff cache-ok headers was sent.
         */
        public function checkLastModified( $timestamp ) {
-               global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
+               global $wgCachePages, $wgCacheEpoch, $wgRequest;
 
                if ( !$timestamp || $timestamp == '19700101000000' ) {
                        wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
@@ -542,7 +562,7 @@ class OutputPage {
                        wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
                        return false;
                }
-               if( $wgUser->getOption( 'nocache' ) ) {
+               if( $this->getUser()->getOption( 'nocache' ) ) {
                        wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
                        return false;
                }
@@ -550,7 +570,7 @@ class OutputPage {
                $timestamp = wfTimestamp( TS_MW, $timestamp );
                $modifiedTimes = array(
                        'page' => $timestamp,
-                       'user' => $wgUser->getTouched(),
+                       'user' => $this->getUser()->getTouched(),
                        'epoch' => $wgCacheEpoch
                );
                wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
@@ -731,13 +751,35 @@ class OutputPage {
                return $this->mPagetitle;
        }
 
+       /**
+        * Set the RequestContext used in this instance
+        *
+        * @param RequestContext $context
+        */
+       public function setContext( RequestContext $context ) {
+               $this->mContext = $context;
+       }
+
+       /**
+        * Get the RequestContext used in this instance
+        *
+        * @return RequestContext
+        */
+       public function getContext() {
+               if ( !isset($this->mContext) ) {
+                       wfDebug( __METHOD__ . " called and \$mContext is null. Using RequestContext::getMain(); for sanity\n" );
+                       $this->mContext = RequestContext::getMain();
+               }
+               return $this->mContext;
+       }
+
        /**
         * Set the Title object to use
         *
         * @param $t Title object
         */
        public function setTitle( $t ) {
-               $this->mTitle = $t;
+               $this->getContext()->setTitle($t);
        }
 
        /**
@@ -746,13 +788,27 @@ class OutputPage {
         * @return Title
         */
        public function getTitle() {
-               if ( $this->mTitle instanceof Title ) {
-                       return $this->mTitle;
-               } else {
-                       wfDebug( __METHOD__ . " called and \$mTitle is null. Return \$wgTitle for sanity\n" );
-                       global $wgTitle;
-                       return $wgTitle;
-               }
+               return $this->getContext()->getTitle();
+       }
+
+       /**
+        * Get the User object used in this instance
+        *
+        * @return User
+        * @since 1.18
+        */
+       public function getUser() {
+               return $this->getContext()->getUser();
+       }
+
+       /**
+        * Get the Skin object used to render this instance
+        *
+        * @return Skin
+        * @since 1.18
+        */
+       public function getSkin() {
+               return $this->getContext()->getSkin();
        }
 
        /**
@@ -992,7 +1048,7 @@ class OutputPage {
         * @param $categories Array mapping category name => sort key
         */
        public function addCategoryLinks( $categories ) {
-               global $wgUser, $wgContLang;
+               global $wgContLang;
 
                if ( !is_array( $categories ) || count( $categories ) == 0 ) {
                        return;
@@ -1031,7 +1087,6 @@ class OutputPage {
 
                # Add the remaining categories to the skin
                if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
-                       $sk = $wgUser->getSkin();
                        foreach ( $categories as $category => $type ) {
                                $origcategory = $category;
                                $title = Title::makeTitleSafe( NS_CATEGORY, $category );
@@ -1043,7 +1098,7 @@ class OutputPage {
                                }
                                $text = $wgContLang->convertHtml( $title->getText() );
                                $this->mCategories[] = $title->getText();
-                               $this->mCategoryLinks[$type][] = $sk->link( $title, $text );
+                               $this->mCategoryLinks[$type][] = $this->getSkin()->link( $title, $text );
                        }
                }
        }
@@ -1212,6 +1267,24 @@ class OutputPage {
                return $this->mRevisionId;
        }
 
+       /**
+        * Get the templates used on this page
+        *
+        * @return Array (namespace => dbKey => revId)
+        */
+       public function getTemplateIds() {
+               return $this->mTemplateIds;
+       }
+
+       /**
+        * Get the files used on this page
+        *
+        * @return Array (dbKey => array('time' => MW timestamp or null, 'sha1' => sha1 or ''))
+        */
+       public function getImageTimeKeys() {
+               return $this->mImageTimeKeys;
+       }
+
        /**
         * Convert wikitext to HTML and add it to the buffer
         * Default assumes that the current page title will be used.
@@ -1305,14 +1378,19 @@ class OutputPage {
                $this->mNoGallery = $parserOutput->getNoGallery();
                $this->mHeadItems = array_merge( $this->mHeadItems, $parserOutput->getHeadItems() );
                $this->addModules( $parserOutput->getModules() );
-               // Versioning...
-               foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
+
+               // Template versioning...
+               foreach ( (array)$parserOutput->getTemplateIds() as $ns => $dbks ) {
                        if ( isset( $this->mTemplateIds[$ns] ) ) {
                                $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
                        } else {
                                $this->mTemplateIds[$ns] = $dbks;
                        }
                }
+               // File versioning...
+               foreach ( (array)$parserOutput->getImageTimeKeys() as $dbk => $data ) {
+                       $this->mImageTimeKeys[$dbk] = $data;
+               }
 
                // Hooks registered in the object
                global $wgParserOutputHooks;
@@ -1746,108 +1824,65 @@ class OutputPage {
         * the object, let's actually output it:
         */
        public function output() {
-               global $wgUser, $wgOutputEncoding, $wgRequest;
+               global $wgOutputEncoding, $wgRequest;
                global $wgLanguageCode, $wgDebugRedirects, $wgMimeType;
-               global $wgUseAjax, $wgAjaxWatch;
-               global $wgEnableMWSuggest, $wgUniversalEditButton;
 
                if( $this->mDoNothing ) {
                        return;
                }
+
                wfProfileIn( __METHOD__ );
+
+               $response = $wgRequest->response();
+
                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 );
-                                       $wgRequest->response()->header( "HTTP/1.1 {$this->mRedirectCode} $message" );
+                                       $response->header( "HTTP/1.1 {$this->mRedirectCode} $message" );
                                }
                                $this->mLastModified = wfTimestamp( TS_RFC2822 );
                        }
                        $this->sendCacheControl();
 
-                       $wgRequest->response()->header( "Content-Type: text/html; charset=utf-8" );
+                       $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 {
-                               $wgRequest->response()->header( 'Location: ' . $this->mRedirect );
+                               $response->header( 'Location: ' . $this->mRedirect );
                        }
                        wfProfileOut( __METHOD__ );
                        return;
                } elseif ( $this->mStatusCode ) {
                        $message = self::getStatusMessage( $this->mStatusCode );
                        if ( $message ) {
-                               $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $message );
-                       }
-               }
-
-               // Add base resources
-               $this->addModules( 'mediawiki.util' );
-               global $wgIncludeLegacyJavaScript;
-               if( $wgIncludeLegacyJavaScript ){
-                       $this->addModules( 'mediawiki.legacy.wikibits' );
-               }
-
-               // Add various resources if required
-               if ( $wgUseAjax ) {
-                       $this->addModules( 'mediawiki.legacy.ajax' );
-
-                       wfRunHooks( 'AjaxAddScript', array( &$this ) );
-
-                       if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
-                               $this->addModules( 'mediawiki.action.watch.ajax' );
-                       }
-
-                       if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ) {
-                               $this->addModules( 'mediawiki.legacy.mwsuggest' );
-                       }
-               }
-
-               if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
-                       $this->addModules( 'mediawiki.action.view.rightClickEdit' );
-               }
-
-               if( $wgUniversalEditButton ) {
-                       if( $this->isArticleRelated() && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
-                               && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
-                               // Original UniversalEditButton
-                               $msg = wfMsg( 'edit' );
-                               $this->addLink( array(
-                                       'rel' => 'alternate',
-                                       'type' => 'application/x-wiki',
-                                       'title' => $msg,
-                                       'href' => $this->getTitle()->getLocalURL( 'action=edit' )
-                               ) );
-                               // Alternate edit link
-                               $this->addLink( array(
-                                       'rel' => 'edit',
-                                       'title' => $msg,
-                                       'href' => $this->getTitle()->getLocalURL( 'action=edit' )
-                               ) );
+                               $response->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $message );
                        }
                }
 
-
                # Buffer output; final headers may depend on later processing
                ob_start();
 
-               $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
-               $wgRequest->response()->header( 'Content-language: ' . $wgLanguageCode );
+               $response->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
+               $response->header( 'Content-language: ' . $wgLanguageCode );
 
                // Prevent framing, if requested
                $frameOptions = $this->getFrameOptions();
                if ( $frameOptions ) {
-                       $wgRequest->response()->header( "X-Frame-Options: $frameOptions" );
+                       $response->header( "X-Frame-Options: $frameOptions" );
                }
 
                if ( $this->mArticleBodyOnly ) {
                        $this->out( $this->mBodytext );
                } else {
-                       $sk = $wgUser->getSkin( $this->getTitle() );
+                       $this->addDefaultModules();
+
+                       $sk = $this->getSkin( $this->getTitle() );
 
                        // Hook that allows last minute changes to the output page, e.g.
                        // adding of CSS or Javascript by extensions.
@@ -1889,37 +1924,29 @@ class OutputPage {
         * @return nothing
         */
        function blockedPage( $return = true ) {
-               global $wgUser, $wgContLang, $wgLang;
+               global $wgContLang, $wgLang;
 
                $this->setPageTitle( wfMsg( 'blockedtitle' ) );
                $this->setRobotPolicy( 'noindex,nofollow' );
                $this->setArticleRelated( false );
 
-               $name = User::whoIs( $wgUser->blockedBy() );
-               $reason = $wgUser->blockedFor();
+               $name = $this->getUser()->blockedBy();
+               $reason = $this->getUser()->blockedFor();
                if( $reason == '' ) {
                        $reason = wfMsg( 'blockednoreason' );
                }
                $blockTimestamp = $wgLang->timeanddate(
-                       wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true
+                       wfTimestamp( TS_MW, $this->getUser()->mBlock->mTimestamp ), true
                );
                $ip = wfGetIP();
 
                $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 
-               $blockid = $wgUser->mBlock->mId;
+               $blockid = $this->getUser()->mBlock->getId();
 
-               $blockExpiry = $wgUser->mBlock->mExpiry;
-               if ( $blockExpiry == Block::infinity() ) {
-                       $blockExpiry = wfMessage( 'infiniteblock' );
-               } else {
-                       $blockExpiry = $wgLang->timeanddate(
-                               wfTimestamp( TS_MW, $blockExpiry ),
-                               true
-                       );
-               }
+               $blockExpiry = $wgLang->formatExpiry( $this->getUser()->mBlock->mExpiry );
 
-               if ( $wgUser->mBlock->mAuto ) {
+               if ( $this->getUser()->mBlock->mAuto ) {
                        $msg = 'autoblockedtext';
                } else {
                        $msg = 'blockedtext';
@@ -1927,7 +1954,7 @@ class OutputPage {
 
                /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
                 * This could be a username, an IP range, or a single IP. */
-               $intended = $wgUser->mBlock->mAddress;
+               $intended = $this->getUser()->mBlock->getTarget();
 
                $this->addWikiMsg(
                        $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry,
@@ -2033,22 +2060,18 @@ class OutputPage {
         * Produce the stock "please login to use the wiki" page
         */
        public function loginToUse() {
-               global $wgUser;
-
-               if( $wgUser->isLoggedIn() ) {
+               if( $this->getUser()->isLoggedIn() ) {
                        $this->permissionRequired( 'read' );
                        return;
                }
 
-               $skin = $wgUser->getSkin();
-
                $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
                $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
                $this->setRobotPolicy( 'noindex,nofollow' );
                $this->setArticleRelated( false );
 
                $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
-               $loginLink = $skin->link(
+               $loginLink = $this->getSkin()->link(
                        $loginTitle,
                        wfMsgHtml( 'loginreqlink' ),
                        array(),
@@ -2124,9 +2147,6 @@ class OutputPage {
         * @param $action    String: action that was denied or null if unknown
         */
        public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
-               global $wgUser;
-               $skin = $wgUser->getSkin();
-
                $this->setRobotPolicy( 'noindex,nofollow' );
                $this->setArticleRelated( false );
 
@@ -2141,7 +2161,7 @@ class OutputPage {
                        if( $source ) {
                                $this->setPageTitle( wfMsg( 'viewsource' ) );
                                $this->setSubtitle(
-                                       wfMsg( 'viewsourcefor', $skin->linkKnown( $this->getTitle() ) )
+                                       wfMsg( 'viewsourcefor', $this->getSkin()->linkKnown( $this->getTitle() ) )
                                );
                        } else {
                                $this->setPageTitle( wfMsg( 'badaccess' ) );
@@ -2161,14 +2181,14 @@ class OutputPage {
                        $params = array(
                                'id'   => 'wpTextbox1',
                                'name' => 'wpTextbox1',
-                               'cols' => $wgUser->getOption( 'cols' ),
-                               'rows' => $wgUser->getOption( 'rows' ),
+                               'cols' => $this->getUser()->getOption( 'cols' ),
+                               'rows' => $this->getUser()->getOption( 'rows' ),
                                'readonly' => 'readonly'
                        );
                        $this->addHTML( Html::element( 'textarea', $params, $source ) );
 
                        // Show templates used by this article
-                       $skin = $wgUser->getSkin();
+                       $skin = $this->getSkin();
                        $article = new Article( $this->getTitle() );
                        $this->addHTML( "<div class='templatesUsed'>
 {$skin->formatTemplates( $article->getUsedTemplates() )}
@@ -2242,11 +2262,10 @@ class OutputPage {
         * @param $text String text of the link (input is not escaped)
         */
        public function addReturnTo( $title, $query = array(), $text = null ) {
-               global $wgUser;
                $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullURL() ) );
                $link = wfMsgHtml(
                        'returnto',
-                       $wgUser->getSkin()->link( $title, $text, array(), $query )
+                       $this->getSkin()->link( $title, $text, array(), $query )
                );
                $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
        }
@@ -2294,7 +2313,7 @@ class OutputPage {
        public function headElement( Skin $sk, $includeStyle = true ) {
                global $wgOutputEncoding, $wgMimeType;
                global $wgUseTrackbacks, $wgHtml5;
-               global $wgUser, $wgRequest, $wgLang;
+               global $wgRequest, $wgLang;
 
                if ( $sk->commonPrintStylesheet() ) {
                        $this->addModuleStyles( 'mediawiki.legacy.wikiprintable' );
@@ -2314,18 +2333,10 @@ class OutputPage {
                        $ret .= "$openHead\n";
                }
 
-               if ( $wgHtml5 ) {
-                       # More succinct than <meta http-equiv=Content-Type>, has the
-                       # same effect
-                       $ret .= Html::element( 'meta', array( 'charset' => $wgOutputEncoding ) ) . "\n";
-               } else {
-                       $this->addMeta( 'http:Content-Type', "$wgMimeType; charset=$wgOutputEncoding" );
-               }
-
                $ret .= Html::element( 'title', null, $this->getHTMLTitle() ) . "\n";
 
                $ret .= implode( "\n", array(
-                       $this->getHeadLinks( $sk ),
+                       $this->getHeadLinks( $sk, true ),
                        $this->buildCssLinks( $sk ),
                        $this->getHeadItems()
                ) );
@@ -2346,8 +2357,8 @@ class OutputPage {
 
                if (
                        $this->getTitle()->getNamespace() != NS_SPECIAL &&
-                       !in_array( $action, array( 'edit', 'submit' ) ) &&
-                       $wgUser->getOption( 'editondblclick' )
+                       in_array( $action, array( 'view', 'purge' ) ) &&
+                       $this->getUser()->getOption( 'editondblclick' )
                )
                {
                        $bodyAttrs['ondblclick'] = "document.location = '" . Xml::escapeJsString( $this->getTitle()->getEditURL() ) . "'";
@@ -2372,6 +2383,39 @@ class OutputPage {
                return $ret;
        }
 
+       /**
+        * Add the default ResourceLoader modules to this object
+        */
+       private function addDefaultModules() {
+               global $wgIncludeLegacyJavaScript,
+                       $wgUseAjax, $wgAjaxWatch, $wgEnableMWSuggest;
+
+               // Add base resources
+               $this->addModules( 'mediawiki.util' );
+               if( $wgIncludeLegacyJavaScript ){
+                       $this->addModules( 'mediawiki.legacy.wikibits' );
+               }
+
+               // Add various resources if required
+               if ( $wgUseAjax ) {
+                       $this->addModules( 'mediawiki.legacy.ajax' );
+
+                       wfRunHooks( 'AjaxAddScript', array( &$this ) );
+
+                       if( $wgAjaxWatch && $this->getUser()->isLoggedIn() ) {
+                               $this->addModules( 'mediawiki.action.watch.ajax' );
+                       }
+
+                       if ( $wgEnableMWSuggest && !$this->getUser()->getOption( 'disablesuggest', false ) ) {
+                               $this->addModules( 'mediawiki.legacy.mwsuggest' );
+                       }
+               }
+
+               if( $this->getUser()->getBoolOption( 'editsectiononrightclick' ) ) {
+                       $this->addModules( 'mediawiki.action.view.rightClickEdit' );
+               }
+       }
+
        /**
         * Get a ResourceLoader object associated with this OutputPage
         *
@@ -2393,7 +2437,7 @@ class OutputPage {
         * @return string html <script> and <style> tags
         */
        protected function makeResourceLoaderLink( Skin $skin, $modules, $only, $useESI = false ) {
-               global $wgUser, $wgLang, $wgLoadScript, $wgResourceLoaderUseESI,
+               global $wgLang, $wgLoadScript, $wgResourceLoaderUseESI,
                        $wgResourceLoaderInlinePrivateModules, $wgRequest;
                // Lazy-load ResourceLoader
                // TODO: Should this be a static function of ResourceLoader instead?
@@ -2458,8 +2502,8 @@ class OutputPage {
                foreach ( $groups as $group => $modules ) {
                        $query = $baseQuery;
                        // Special handling for user-specific groups
-                       if ( ( $group === 'user' || $group === 'private' ) && $wgUser->isLoggedIn() ) {
-                               $query['user'] = $wgUser->getName();
+                       if ( ( $group === 'user' || $group === 'private' ) && $this->getUser()->isLoggedIn() ) {
+                               $query['user'] = $this->getUser()->getName();
                        }
                        
                        // Create a fake request based on the one we are about to make so modules return
@@ -2545,7 +2589,7 @@ class OutputPage {
         * @return String: HTML fragment
         */
        function getHeadScripts( Skin $sk ) {
-               global $wgUser, $wgRequest, $wgUseSiteJs, $wgAllowUserJs;
+               global $wgRequest, $wgUseSiteJs, $wgAllowUserJs;
 
                // Startup - this will immediately load jquery and mediawiki modules
                $scripts = $this->makeResourceLoaderLink( $sk, 'startup', ResourceLoaderModule::TYPE_SCRIPTS, true );
@@ -2575,15 +2619,15 @@ class OutputPage {
                // Add site JS if enabled
                if ( $wgUseSiteJs ) {
                        $scripts .= $this->makeResourceLoaderLink( $sk, 'site', ResourceLoaderModule::TYPE_SCRIPTS );
-                       if( $wgUser->isLoggedIn() ){
+                       if( $this->getUser()->isLoggedIn() ){
                                $userScripts[] = 'user.groups';
                        }
                }
 
                // Add user JS if enabled
-               if ( $wgAllowUserJs && $wgUser->isLoggedIn() ) {
+               if ( $wgAllowUserJs && $this->getUser()->isLoggedIn() ) {
                        $action = $wgRequest->getVal( 'action', 'view' );
-                       if( $this->mTitle && $this->mTitle->isJsSubpage() && $sk->userCanPreview( $action ) ) {
+                       if( $this->getTitle() && $this->getTitle()->isJsSubpage() && $sk->userCanPreview( $action ) ) {
                                # XXX: additional security check/prompt?
                                $scripts .= Html::inlineScript( "\n" . $wgRequest->getText( 'wpTextbox1' ) . "\n" ) . "\n";
                        } else {
@@ -2606,7 +2650,7 @@ class OutputPage {
         * have to be purged on configuration changes.
         */
        protected function getJSVars() {
-               global $wgUser, $wgRequest, $wgUseAjax, $wgEnableMWSuggest, $wgContLang;
+               global $wgRequest, $wgUseAjax, $wgEnableMWSuggest, $wgContLang;
 
                $title = $this->getTitle();
                $ns = $title->getNamespace();
@@ -2628,8 +2672,8 @@ class OutputPage {
                        'wgArticleId' => $title->getArticleId(),
                        'wgIsArticle' => $this->isArticle(),
                        'wgAction' => $wgRequest->getText( 'action', 'view' ),
-                       'wgUserName' => $wgUser->isAnon() ? null : $wgUser->getName(),
-                       'wgUserGroups' => $wgUser->getEffectiveGroups(),
+                       'wgUserName' => $this->getUser()->isAnon() ? null : $this->getUser()->getName(),
+                       'wgUserGroups' => $this->getUser()->getEffectiveGroups(),
                        'wgCategories' => $this->getCategories(),
                        'wgBreakFrames' => $this->getFrameOptions() == 'DENY',
                );
@@ -2639,8 +2683,8 @@ class OutputPage {
                foreach ( $title->getRestrictionTypes() as $type ) {
                        $vars['wgRestriction' . ucfirst( $type )] = $title->getRestrictions( $type );
                }
-               if ( $wgUseAjax && $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ) {
-                       $vars['wgSearchNamespaces'] = SearchEngine::userNamespaces( $wgUser );
+               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
@@ -2650,28 +2694,48 @@ class OutputPage {
        }
 
        /**
-        * Add default \<meta\> tags
+        * @return string HTML tag links to be put in the header.
         */
-       protected function addDefaultMeta() {
-               global $wgVersion, $wgHtml5;
+       public function getHeadLinks( Skin $sk, $addContentType = false ) {
+               global $wgUniversalEditButton, $wgFavicon, $wgAppleTouchIcon, $wgEnableAPI,
+                       $wgSitename, $wgVersion, $wgHtml5, $wgMimeType, $wgOutputEncoding,
+                       $wgFeed, $wgOverrideSiteFeed, $wgAdvertisedFeedTypes,
+                       $wgEnableDublinCoreRdf, $wgEnableCreativeCommonsRdf,
+                       $wgDisableLangConversion, $wgCanonicalLanguageLinks, $wgContLang,
+                       $wgRightsPage, $wgRightsUrl;
 
-               static $called = false;
-               if ( $called ) {
-                       # Don't run this twice
-                       return;
-               }
-               $called = true;
+               $tags = array();
 
-               if ( !$wgHtml5 ) {
-                       $this->addMeta( 'http:Content-Style-Type', 'text/css' ); // bug 15835
+               if ( $addContentType ) {
+                       if ( $wgHtml5 ) {
+                               # More succinct than <meta http-equiv=Content-Type>, has the
+                               # same effect
+                               $tags[] = Html::element( 'meta', array( 'charset' => $wgOutputEncoding ) );
+                       } else {
+                               $tags[] = Html::element( 'meta', array(
+                                       'http-equiv' => 'Content-Type',
+                                       'content' => "$wgMimeType; charset=$wgOutputEncoding"
+                               ) );
+                               $tags[] = Html::element( 'meta', array(  // bug 15835
+                                       'http-equiv' => 'Content-Style-Type',
+                                       'content' => 'text/css'
+                               ) );
+                       }
                }
-               $this->addMeta( 'generator', "MediaWiki $wgVersion" );
+
+               $tags[] = Html::element( 'meta', array(
+                       'name' => 'generator',
+                       'content' => "MediaWiki $wgVersion",
+               ) );
 
                $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
                if( $p !== 'index,follow' ) {
                        // http://www.robotstxt.org/wc/meta-user.html
                        // Only show if it's different from the default robots policy
-                       $this->addMeta( 'robots', $p );
+                       $tags[] = Html::element( 'meta', array(
+                               'name' => 'robots',
+                               'content' => $p,
+                       ) );
                }
 
                if ( count( $this->mKeywords ) > 0 ) {
@@ -2679,27 +2743,15 @@ class OutputPage {
                                "/<.*?" . ">/" => '',
                                "/_/" => ' '
                        );
-                       $this->addMeta(
-                               'keywords',
-                               preg_replace(
+                       $tags[] = Html::element( 'meta', array(
+                               'name' => 'keywords',
+                               'content' =>  preg_replace(
                                        array_keys( $strip ),
                                        array_values( $strip ),
                                        implode( ',', $this->mKeywords )
                                )
-                       );
+                       ) );
                }
-       }
-
-       /**
-        * @return string HTML tag links to be put in the header.
-        */
-       public function getHeadLinks( Skin $sk ) {
-               global $wgFeed;
-
-               // Ideally this should happen earlier, somewhere. :P
-               $this->addDefaultMeta();
-
-               $tags = array();
 
                foreach ( $this->mMetatags as $tag ) {
                        if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
@@ -2715,11 +2767,137 @@ class OutputPage {
                                )
                        );
                }
+
                foreach ( $this->mLinktags as $tag ) {
                        $tags[] = Html::element( 'link', $tag );
                }
 
-               if( $wgFeed ) {
+               # Universal edit button
+               if ( $wgUniversalEditButton ) {
+                       if ( $this->isArticleRelated() && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
+                               && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
+                               // Original UniversalEditButton
+                               $msg = wfMsg( 'edit' );
+                               $tags[] = Html::element( 'link', array(
+                                       'rel' => 'alternate',
+                                       'type' => 'application/x-wiki',
+                                       'title' => $msg,
+                                       'href' => $this->getTitle()->getLocalURL( 'action=edit' )
+                               ) );
+                               // Alternate edit link
+                               $tags[] = Html::element( 'link', array(
+                                       'rel' => 'edit',
+                                       'title' => $msg,
+                                       'href' => $this->getTitle()->getLocalURL( 'action=edit' )
+                               ) );
+                       }
+               }
+
+               # Generally the order of the favicon and apple-touch-icon links
+               # should not matter, but Konqueror (3.5.9 at least) incorrectly
+               # uses whichever one appears later in the HTML source. Make sure
+               # apple-touch-icon is specified first to avoid this.
+               if ( $wgAppleTouchIcon !== false ) {
+                       $tags[] = Html::element( 'link', array( 'rel' => 'apple-touch-icon', 'href' => $wgAppleTouchIcon ) );
+               }
+
+               if ( $wgFavicon !== false ) {
+                       $tags[] = Html::element( 'link', array( 'rel' => 'shortcut icon', 'href' => $wgFavicon ) );
+               }
+
+               # OpenSearch description link
+               $tags[] = Html::element( 'link', array(
+                       'rel' => 'search',
+                       'type' => 'application/opensearchdescription+xml',
+                       'href' => wfScript( 'opensearch_desc' ),
+                       'title' => wfMsgForContent( 'opensearch-desc' ),
+               ) );
+
+               if ( $wgEnableAPI ) {
+                       # Real Simple Discovery link, provides auto-discovery information
+                       # for the MediaWiki API (and potentially additional custom API
+                       # support such as WordPress or Twitter-compatible APIs for a
+                       # blogging extension, etc)
+                       $tags[] = Html::element( 'link', array(
+                               'rel' => 'EditURI',
+                               'type' => 'application/rsd+xml',
+                               'href' => wfExpandUrl( wfAppendQuery( wfScript( 'api' ), array( 'action' => 'rsd' ) ) ),
+                       ) );
+               }
+
+               # 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 ) {
+                                       $tags[] = Html::element( 'link', array(
+                                               'rel' => 'alternate',
+                                               'hreflang' => $_v,
+                                               'href' => $this->getTitle()->getLocalURL( '', $_v ) )
+                                       );
+                               }
+                       } else {
+                               $tags[] = Html::element( 'link', array(
+                                       'rel' => 'canonical',
+                                       'href' => $this->getTitle()->getFullURL() )
+                               );
+                       }
+               }
+
+               # Copyright
+               $copyright = '';
+               if ( $wgRightsPage ) {
+                       $copy = Title::newFromText( $wgRightsPage );
+
+                       if ( $copy ) {
+                               $copyright = $copy->getLocalURL();
+                       }
+               }
+
+               if ( !$copyright && $wgRightsUrl ) {
+                       $copyright = $wgRightsUrl;
+               }
+
+               if ( $copyright ) {
+                       $tags[] = Html::element( 'link', array(
+                               'rel' => 'copyright',
+                               'href' => $copyright )
+                       );
+               }
+
+               # 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
@@ -2742,7 +2920,6 @@ class OutputPage {
                        # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
                        # If so, use it instead.
 
-                       global $wgOverrideSiteFeed, $wgSitename, $wgAdvertisedFeedTypes;
                        $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
 
                        if ( $wgOverrideSiteFeed ) {