merged master
[lhc/web/wiklou.git] / includes / EditPage.php
index f8be535..dfc13d5 100644 (file)
@@ -155,6 +155,11 @@ class EditPage {
         */
        const AS_IMAGE_REDIRECT_LOGGED     = 234;
 
+       /**
+        * Status: can't parse content
+        */
+       const AS_PARSE_ERROR                = 240;
+
        /**
         * HTML id and name for the beginning of the edit form.
         */
@@ -214,6 +219,7 @@ class EditPage {
        var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
        var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
        var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
+       var $content_model = null, $content_format = null;
 
        # Placeholders for text injection by hooks (must be HTML)
        # extensions should take care to _append_ to the present value
@@ -225,7 +231,7 @@ class EditPage {
        public $editFormTextBottom = '';
        public $editFormTextAfterContent = '';
        public $previewTextAfterContent = '';
-       public $mPreloadText = '';
+       public $mPreloadContent = null;
 
        /* $didSave should be set to true whenever an article was succesfully altered. */
        public $didSave = false;
@@ -239,6 +245,11 @@ class EditPage {
        public function __construct( Article $article ) {
                $this->mArticle = $article;
                $this->mTitle = $article->getTitle();
+
+               $this->content_model = $this->mTitle->getContentModel();
+
+               $handler = ContentHandler::getForModelID( $this->content_model );
+               $this->content_format = $handler->getDefaultFormat(); #NOTE: should be overridden by format of actual revision
        }
 
        /**
@@ -450,10 +461,10 @@ class EditPage {
                        return;
                }
 
-               $content = $this->getContent();
+               $content = $this->getContentObject();
 
                # Use the normal message if there's nothing to display
-               if ( $this->firsttime && $content === '' ) {
+               if ( $this->firsttime && $content->isEmpty() ) {
                        $action = $this->mTitle->exists() ? 'edit' :
                                ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
                        throw new PermissionsError( $action, $permErrors );
@@ -467,13 +478,14 @@ class EditPage {
                # If the user made changes, preserve them when showing the markup
                # (This happens when a user is blocked during edit, for instance)
                if ( !$this->firsttime ) {
-                       $content = $this->textbox1;
+                       $text = $this->textbox1;
                        $wgOut->addWikiMsg( 'viewyourtext' );
                } else {
+                       $text = $content->serialize( $this->content_format );
                        $wgOut->addWikiMsg( 'viewsourcetext' );
                }
 
-               $this->showTextbox( $content, 'wpTextbox1', array( 'readonly' ) );
+               $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 
                $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
                        Linker::formatTemplates( $this->getTemplates() ) ) );
@@ -679,7 +691,7 @@ class EditPage {
                } else {
                        # Not a posted form? Start with nothing.
                        wfDebug( __METHOD__ . ": Not a posted form.\n" );
-                       $this->textbox1     = '';
+                       $this->textbox1     = ''; #FIXME: track content object
                        $this->summary      = '';
                        $this->sectiontitle = '';
                        $this->edittime     = '';
@@ -711,10 +723,17 @@ class EditPage {
                        }
                }
 
+               $this->oldid = $request->getInt( 'oldid' );
+
                $this->bot = $request->getBool( 'bot', true );
                $this->nosummary = $request->getBool( 'nosummary' );
 
-               $this->oldid = $request->getInt( 'oldid' );
+               $content_handler = ContentHandler::getForTitle( $this->mTitle );
+               $this->content_model = $request->getText( 'model', $content_handler->getModelID() ); #may be overridden by revision
+               $this->content_format = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
+
+               #TODO: check if the desired model is allowed in this namespace, and if a transition from the page's current model to the new model is allowed
+               #TODO: check if the desired content model supports the given content format!
 
                $this->live = $request->getCheck( 'live' );
                $this->editintro = $request->getText( 'editintro',
@@ -747,7 +766,10 @@ class EditPage {
        function initialiseForm() {
                global $wgUser;
                $this->edittime = $this->mArticle->getTimestamp();
-               $this->textbox1 = $this->getContent( false );
+
+               $content = $this->getContentObject( false ); #TODO: track content object?!
+               $this->textbox1 = $content->serialize( $this->content_format );
+
                // activate checkboxes if user wants them to be always active
                # Sort out the "watch" checkbox
                if ( $wgUser->getOption( 'watchdefault' ) ) {
@@ -776,33 +798,54 @@ class EditPage {
         * @param $def_text string
         * @return mixed string on success, $def_text for invalid sections
         * @private
+        * @deprecated since 1.WD
         */
-       function getContent( $def_text = '' ) {
-               global $wgOut, $wgRequest, $wgParser;
+       function getContent( $def_text = false ) { #FIXME: deprecated, replace usage!
+               wfDeprecated( __METHOD__, '1.WD' );
+
+               if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
+                       $def_content = ContentHandler::makeContent( $def_text, $this->getTitle() );
+               } else {
+                       $def_content = false;
+               }
+
+               $content = $this->getContentObject( $def_content );
+
+               return $content->serialize( $this->content_format ); #XXX: really use serialized form? use ContentHandler::getContentText() instead?
+       }
+
+       private function getContentObject( $def_content = null ) { #FIXME: use this!
+               global $wgOut, $wgRequest;
 
                wfProfileIn( __METHOD__ );
 
-               $text = false;
+               $content = false;
 
                // For message page not locally set, use the i18n message.
                // For other non-existent articles, use preload text if any.
                if ( !$this->mTitle->exists() || $this->section == 'new' ) {
                        if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
                                # If this is a system message, get the default text.
-                               $text = $this->mTitle->getDefaultMessageText();
+                               $msg = $this->mTitle->getDefaultMessageText();
+
+                               $content = ContentHandler::makeContent( $msg, $this->mTitle );
                        }
-                       if ( $text === false ) {
+                       if ( $content === false ) {
                                # If requested, preload some text.
                                $preload = $wgRequest->getVal( 'preload',
                                        // Custom preload text for new sections
                                        $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
-                               $text = $this->getPreloadedText( $preload );
+
+                               $content = $this->getPreloadedContent( $preload );
                        }
                // For existing pages, get text based on "undo" or section parameters.
                } else {
                        if ( $this->section != '' ) {
                                // Get section edit text (returns $def_text for invalid sections)
-                               $text = $wgParser->getSection( $this->getOriginalContent(), $this->section, $def_text );
+                               $orig = $this->getOriginalContent();
+                               $content = $orig ? $orig->getSection( $this->section ) : null;
+
+                               if ( !$content ) $content = $def_content;
                        } else {
                                $undoafter = $wgRequest->getInt( 'undoafter' );
                                $undo = $wgRequest->getInt( 'undo' );
@@ -818,15 +861,16 @@ class EditPage {
 
                                        # Sanity check, make sure it's the right page,
                                        # the revisions exist and they were not deleted.
-                                       # Otherwise, $text will be left as-is.
+                                       # Otherwise, $content will be left as-is.
                                        if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
                                                $undorev->getPage() == $oldrev->getPage() &&
                                                $undorev->getPage() == $this->mTitle->getArticleID() &&
                                                !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
                                                !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 
-                                               $text = $this->mArticle->getUndoText( $undorev, $oldrev );
-                                               if ( $text === false ) {
+                                               $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
+
+                                               if ( $content === false ) {
                                                        # Warn the user that something went wrong
                                                        $undoMsg = 'failure';
                                                } else {
@@ -858,14 +902,14 @@ class EditPage {
                                                wfMsgNoTrans( 'undo-' . $undoMsg ) . '</div>', true, /* interface */true );
                                }
 
-                               if ( $text === false ) {
-                                       $text = $this->getOriginalContent();
+                               if ( $content === false ) {
+                                       $content = $this->getOriginalContent();
                                }
                        }
                }
 
                wfProfileOut( __METHOD__ );
-               return $text;
+               return $content;
        }
 
        /**
@@ -884,39 +928,69 @@ class EditPage {
         */
        private function getOriginalContent() {
                if ( $this->section == 'new' ) {
-                       return $this->getCurrentText();
+                       return $this->getCurrentContent();
                }
                $revision = $this->mArticle->getRevisionFetched();
                if ( $revision === null ) {
-                       return '';
+                       if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModel();
+                       $handler = ContentHandler::getForModelID( $this->content_model );
+
+                       return $handler->makeEmptyContent();
                }
-               return $this->mArticle->getContent();
+               $content = $revision->getContent();
+               return $content;
        }
 
        /**
-        * Get the actual text of the page. This is basically similar to
-        * WikiPage::getRawText() except that when the page doesn't exist an empty
-        * string is returned instead of false.
+        * Get the current content of the page. This is basically similar to
+        * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
+        * content object is returned instead of null.
         *
-        * @since 1.19
+        * @since 1.WD
         * @return string
         */
-       private function getCurrentText() {
-               $text = $this->mArticle->getRawText();
-               if ( $text === false ) {
-                       return '';
+       private function getCurrentContent() {
+               $rev = $this->mArticle->getRevision();
+               $content = $rev ? $rev->getContent( Revision::RAW ) : null;
+
+               if ( $content  === false || $content === null ) {
+                       if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModel();
+                       $handler = ContentHandler::getForModelID( $this->content_model );
+
+                       return $handler->makeEmptyContent();
                } else {
-                       return $text;
+                       #FIXME: nasty side-effect!
+                       $this->content_model = $rev->getContentModel();
+                       $this->content_format = $rev->getContentFormat();
+
+                       return $content;
                }
        }
 
+
        /**
         * Use this method before edit() to preload some text into the edit box
         *
         * @param $text string
+        * @deprecated since 1.WD
         */
        public function setPreloadedText( $text ) {
-               $this->mPreloadText = $text;
+               wfDeprecated( __METHOD__, "1.WD" );
+
+               $content = ContentHandler::makeContent( $text, $this->getTitle() );
+
+               $this->setPreloadedContent( $content );
+       }
+
+       /**
+        * Use this method before edit() to preload some content into the edit box
+        *
+        * @param $content Content
+        *
+        * @since 1.WD
+        */
+       public function setPreloadedContent( Content $content ) {
+               $this->mPreloadedContent = $content;
        }
 
        /**
@@ -924,23 +998,47 @@ class EditPage {
         * an earlier setPreloadText() or by loading the given page.
         *
         * @param $preload String: representing the title to preload from.
+        *
         * @return String
+        *
+        * @deprecated since 1.WD, use getPreloadedContent() instead
         */
-       protected function getPreloadedText( $preload ) {
-               global $wgUser, $wgParser;
+       protected function getPreloadedText( $preload ) { #NOTE: B/C only, replace usage!
+               wfDeprecated( __METHOD__, "1.WD" );
+
+               $content = $this->getPreloadedContent( $preload );
+               $text = $content->serialize( $this->content_format ); #XXX: really use serialized form? use ContentHandler::getContentText() instead?!
 
-               if ( !empty( $this->mPreloadText ) ) {
-                       return $this->mPreloadText;
+               return $text;
+       }
+
+       /**
+        * Get the contents to be preloaded into the box, either set by
+        * an earlier setPreloadText() or by loading the given page.
+        *
+        * @param $preload String: representing the title to preload from.
+        *
+        * @return Content
+        *
+        * @since 1.WD
+        */
+       protected function getPreloadedContent( $preload ) { #@todo: use this!
+               global $wgUser;
+
+               if ( !empty( $this->mPreloadContent ) ) {
+                       return $this->mPreloadContent;
                }
 
+               $handler = ContentHandler::getForTitle( $this->getTitle() );
+
                if ( $preload === '' ) {
-                       return '';
+                       return $handler->makeEmptyContent();
                }
 
                $title = Title::newFromText( $preload );
                # Check for existence to avoid getting MediaWiki:Noarticletext
                if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
-                       return '';
+                       return $handler->makeEmptyContent();
                }
 
                $page = WikiPage::factory( $title );
@@ -948,13 +1046,15 @@ class EditPage {
                        $title = $page->getRedirectTarget();
                        # Same as before
                        if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
-                               return '';
+                               return $handler->makeEmptyContent();
                        }
                        $page = WikiPage::factory( $title );
                }
 
                $parserOptions = ParserOptions::newFromUser( $wgUser );
-               return $wgParser->getPreloadText( $page->getRawText(), $title, $parserOptions );
+               $content = $page->getContent( Revision::RAW );
+
+               return $content->preloadTransform( $title, $parserOptions );
        }
 
        /**
@@ -1002,6 +1102,11 @@ class EditPage {
                        case self::AS_HOOK_ERROR:
                                return false;
 
+                       case self::AS_PARSE_ERROR:
+                               $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>');
+                               #FIXME: cause editform to be shown again, not just an error!
+                               return false;
+
                        case self::AS_SUCCESS_NEW_ARTICLE:
                                $query = $resultDetails['redirect'] ? 'redirect=no' : '';
                                $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
@@ -1096,7 +1201,7 @@ class EditPage {
 
                # Check image redirect
                if ( $this->mTitle->getNamespace() == NS_FILE &&
-                       Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
+                       Title::newFromRedirect( $this->textbox1 ) instanceof Title && #FIXME: use content handler to check for redirect
                        !$wgUser->isAllowed( 'upload' ) ) {
                                $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
                                $status->setResult( false, $code );
@@ -1206,262 +1311,281 @@ class EditPage {
                $this->mArticle->loadPageData( 'fromdbmaster' );
                $new = !$this->mArticle->exists();
 
-               if ( $new ) {
-                       // Late check for create permission, just in case *PARANOIA*
-                       if ( !$this->mTitle->userCan( 'create' ) ) {
-                               $status->fatal( 'nocreatetext' );
-                               $status->value = self::AS_NO_CREATE_PERMISSION;
-                               wfDebug( __METHOD__ . ": no create permission\n" );
-                               wfProfileOut( __METHOD__ );
-                               return $status;
-                       }
+               try {
+                       if ( $new ) {
+                               // Late check for create permission, just in case *PARANOIA*
+                               if ( !$this->mTitle->userCan( 'create' ) ) {
+                                       $status->fatal( 'nocreatetext' );
+                                       $status->value = self::AS_NO_CREATE_PERMISSION;
+                                       wfDebug( __METHOD__ . ": no create permission\n" );
+                                       wfProfileOut( __METHOD__ );
+                                       return $status;
+                               }
 
-                       # Don't save a new article if it's blank.
-                       if ( $this->textbox1 == '' ) {
-                               $status->setResult( false, self::AS_BLANK_ARTICLE );
-                               wfProfileOut( __METHOD__ );
-                               return $status;
-                       }
+                               # Don't save a new article if it's blank.
+                               if ( $this->textbox1 == '' ) {
+                                       $status->setResult( false, self::AS_BLANK_ARTICLE );
+                                       wfProfileOut( __METHOD__ );
+                                       return $status;
+                               }
 
-                       // Run post-section-merge edit filter
-                       if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
-                               # Error messages etc. could be handled within the hook...
-                               $status->fatal( 'hookaborted' );
-                               $status->value = self::AS_HOOK_ERROR;
-                               wfProfileOut( __METHOD__ );
-                               return $status;
-                       } elseif ( $this->hookError != '' ) {
-                               # ...or the hook could be expecting us to produce an error
-                               $status->fatal( 'hookaborted' );
-                               $status->value = self::AS_HOOK_ERROR_EXPECTED;
-                               wfProfileOut( __METHOD__ );
-                               return $status;
-                       }
+                               // Run post-section-merge edit filter
+                               if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
+                                       # Error messages etc. could be handled within the hook...
+                                       $status->fatal( 'hookaborted' );
+                                       $status->value = self::AS_HOOK_ERROR;
+                                       wfProfileOut( __METHOD__ );
+                                       return $status;
+                               } elseif ( $this->hookError != '' ) {
+                                       # ...or the hook could be expecting us to produce an error
+                                       $status->fatal( 'hookaborted' );
+                                       $status->value = self::AS_HOOK_ERROR_EXPECTED;
+                                       wfProfileOut( __METHOD__ );
+                                       return $status;
+                               }
 
-                       $text = $this->textbox1;
-                       $result['sectionanchor'] = '';
-                       if ( $this->section == 'new' ) {
-                               if ( $this->sectiontitle !== '' ) {
-                                       // Insert the section title above the content.
-                                       $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->sectiontitle ) . "\n\n" . $text;
-
-                                       // Jump to the new section
-                                       $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
-
-                                       // If no edit summary was specified, create one automatically from the section
-                                       // title and have it link to the new section. Otherwise, respect the summary as
-                                       // passed.
-                                       if ( $this->summary === '' ) {
-                                               $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
-                                               $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
-                                       }
-                               } elseif ( $this->summary !== '' ) {
-                                       // Insert the section title above the content.
-                                       $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $text;
+                               $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
 
-                                       // Jump to the new section
-                                       $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
+                               $result['sectionanchor'] = '';
+                               if ( $this->section == 'new' ) {
+                                       if ( $this->sectiontitle !== '' ) {
+                                               // Insert the section title above the content.
+                                               $content = $content->addSectionHeader( $this->sectiontitle );
+
+                                               // Jump to the new section
+                                               $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
+
+                                               // If no edit summary was specified, create one automatically from the section
+                                               // title and have it link to the new section. Otherwise, respect the summary as
+                                               // passed.
+                                               if ( $this->summary === '' ) {
+                                                       $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
+                                                       $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
+                                               }
+                                       } elseif ( $this->summary !== '' ) {
+                                               // Insert the section title above the content.
+                                               $content = $content->addSectionHeader( $this->sectiontitle );
 
-                                       // Create a link to the new section from the edit summary.
-                                       $cleanSummary = $wgParser->stripSectionName( $this->summary );
-                                       $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
+                                               // Jump to the new section
+                                               $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
+
+                                               // Create a link to the new section from the edit summary.
+                                               $cleanSummary = $wgParser->stripSectionName( $this->summary );
+                                               $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
+                                       }
                                }
-                       }
 
-                       $status->value = self::AS_SUCCESS_NEW_ARTICLE;
+                               $status->value = self::AS_SUCCESS_NEW_ARTICLE;
 
-               } else {
+                       } else { # not $new
 
-                       # Article exists. Check for edit conflict.
-                       $timestamp = $this->mArticle->getTimestamp();
-                       wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
+                               # Article exists. Check for edit conflict.
 
-                       if ( $timestamp != $this->edittime ) {
-                               $this->isConflict = true;
-                               if ( $this->section == 'new' ) {
-                                       if ( $this->mArticle->getUserText() == $wgUser->getName() &&
-                                               $this->mArticle->getComment() == $this->summary ) {
-                                               // Probably a duplicate submission of a new comment.
-                                               // This can happen when squid resends a request after
-                                               // a timeout but the first one actually went through.
-                                               wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
-                                       } else {
-                                               // New comment; suppress conflict.
+                               $this->mArticle->clear(); # Force reload of dates, etc.
+                               $timestamp = $this->mArticle->getTimestamp();
+
+                               wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
+
+                               if ( $timestamp != $this->edittime ) {
+                                       $this->isConflict = true;
+                                       if ( $this->section == 'new' ) {
+                                               if ( $this->mArticle->getUserText() == $wgUser->getName() &&
+                                                       $this->mArticle->getComment() == $this->summary ) {
+                                                       // Probably a duplicate submission of a new comment.
+                                                       // This can happen when squid resends a request after
+                                                       // a timeout but the first one actually went through.
+                                                       wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
+                                               } else {
+                                                       // New comment; suppress conflict.
+                                                       $this->isConflict = false;
+                                                       wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
+                                               }
+                                       } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
+                                               # Suppress edit conflict with self, except for section edits where merging is required.
+                                               wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
                                                $this->isConflict = false;
-                                               wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
                                        }
-                               } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
-                                       # Suppress edit conflict with self, except for section edits where merging is required.
-                                       wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
-                                       $this->isConflict = false;
                                }
-                       }
-
-                       // If sectiontitle is set, use it, otherwise use the summary as the section title (for
-                       // backwards compatibility with old forms/bots).
-                       if ( $this->sectiontitle !== '' ) {
-                               $sectionTitle = $this->sectiontitle;
-                       } else {
-                               $sectionTitle = $this->summary;
-                       }
 
-                       if ( $this->isConflict ) {
-                               wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '{$timestamp}')\n" );
-                               $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $sectionTitle, $this->edittime );
-                       } else {
-                               wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
-                               $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $sectionTitle );
-                       }
-                       if ( is_null( $text ) ) {
-                               wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
-                               $this->isConflict = true;
-                               $text = $this->textbox1; // do not try to merge here!
-                       } elseif ( $this->isConflict ) {
-                               # Attempt merge
-                               if ( $this->mergeChangesInto( $text ) ) {
-                                       // Successful merge! Maybe we should tell the user the good news?
-                                       $this->isConflict = false;
-                                       wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
+                               // If sectiontitle is set, use it, otherwise use the summary as the section title (for
+                               // backwards compatibility with old forms/bots).
+                               if ( $this->sectiontitle !== '' ) {
+                                       $sectionTitle = $this->sectiontitle;
                                } else {
-                                       $this->section = '';
-                                       $this->textbox1 = $text;
-                                       wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
+                                       $sectionTitle = $this->summary;
                                }
-                       }
 
-                       if ( $this->isConflict ) {
-                               $status->setResult( false, self::AS_CONFLICT_DETECTED );
-                               wfProfileOut( __METHOD__ );
-                               return $status;
-                       }
+                               $textbox_content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
+                               $content = null;
 
-                       // Run post-section-merge edit filter
-                       if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
-                               # Error messages etc. could be handled within the hook...
-                               $status->fatal( 'hookaborted' );
-                               $status->value = self::AS_HOOK_ERROR;
-                               wfProfileOut( __METHOD__ );
-                               return $status;
-                       } elseif ( $this->hookError != '' ) {
-                               # ...or the hook could be expecting us to produce an error
-                               $status->fatal( 'hookaborted' );
-                               $status->value = self::AS_HOOK_ERROR_EXPECTED;
-                               wfProfileOut( __METHOD__ );
-                               return $status;
-                       }
+                               if ( $this->isConflict ) {
+                                       wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '{$timestamp}')\n" );
+                                       $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
+                               } else {
+                                       wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
+                                       $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
+                               }
 
-                       # Handle the user preference to force summaries here, but not for null edits
-                       if ( $this->section != 'new' && !$this->allowBlankSummary
-                               && $this->getOriginalContent() != $text
-                               && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
-                       {
-                               if ( md5( $this->summary ) == $this->autoSumm ) {
-                                       $this->missingSummary = true;
-                                       $status->fatal( 'missingsummary' );
-                                       $status->value = self::AS_SUMMARY_NEEDED;
-                                       wfProfileOut( __METHOD__ );
-                                       return $status;
+                               if ( is_null( $content ) ) {
+                                       wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
+                                       $this->isConflict = true;
+                                       $content = $textbox_content; // do not try to merge here!
+                               } elseif ( $this->isConflict ) {
+                                       # Attempt merge
+                                       if ( $this->mergeChangesIntoContent( $textbox_content ) ) {
+                                               // Successful merge! Maybe we should tell the user the good news?
+                                               $this->isConflict = false;
+                                               $content = $textbox_content;
+                                               wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
+                                       } else {
+                                               $this->section = '';
+                                               #$this->textbox1 = $text; #redundant, nothing to do here?
+                                               wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
+                                       }
                                }
-                       }
 
-                       # And a similar thing for new sections
-                       if ( $this->section == 'new' && !$this->allowBlankSummary ) {
-                               if ( trim( $this->summary ) == '' ) {
-                                       $this->missingSummary = true;
-                                       $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
-                                       $status->value = self::AS_SUMMARY_NEEDED;
+                               if ( $this->isConflict ) {
+                                       $status->setResult( false, self::AS_CONFLICT_DETECTED );
                                        wfProfileOut( __METHOD__ );
                                        return $status;
                                }
-                       }
 
-                       # All's well
-                       wfProfileIn( __METHOD__ . '-sectionanchor' );
-                       $sectionanchor = '';
-                       if ( $this->section == 'new' ) {
-                               if ( $this->textbox1 == '' ) {
-                                       $this->missingComment = true;
-                                       $status->fatal( 'missingcommenttext' );
-                                       $status->value = self::AS_TEXTBOX_EMPTY;
-                                       wfProfileOut( __METHOD__ . '-sectionanchor' );
+                               // Run post-section-merge edit filter
+                               if ( !wfRunHooks( 'EditFilterMerged', array( $this, $content->serialize( $this->content_format ), &$this->hookError, $this->summary ) )
+                                               || !wfRunHooks( 'EditFilterMergedContent', array( $this, $content, &$this->hookError, $this->summary ) ) ) {
+                                       # Error messages etc. could be handled within the hook...
+                                       $status->fatal( 'hookaborted' );
+                                       $status->value = self::AS_HOOK_ERROR;
+                                       wfProfileOut( __METHOD__ );
+                                       return $status;
+                               } elseif ( $this->hookError != '' ) {
+                                       # ...or the hook could be expecting us to produce an error
+                                       $status->fatal( 'hookaborted' );
+                                       $status->value = self::AS_HOOK_ERROR_EXPECTED;
                                        wfProfileOut( __METHOD__ );
                                        return $status;
                                }
-                               if ( $this->sectiontitle !== '' ) {
-                                       $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
-                                       // If no edit summary was specified, create one automatically from the section
-                                       // title and have it link to the new section. Otherwise, respect the summary as
-                                       // passed.
-                                       if ( $this->summary === '' ) {
-                                               $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
-                                               $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
+
+                               $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
+
+                               # Handle the user preference to force summaries here, but not for null edits
+                               if ( $this->section != 'new' && !$this->allowBlankSummary
+                                       && !$content->equals( $this->getOriginalContent() )
+                                       && !$content->isRedirect() ) # check if it's not a redirect
+                               {
+                                       if ( md5( $this->summary ) == $this->autoSumm ) {
+                                               $this->missingSummary = true;
+                                               $status->fatal( 'missingsummary' );
+                                               $status->value = self::AS_SUMMARY_NEEDED;
+                                               wfProfileOut( __METHOD__ );
+                                               return $status;
                                        }
-                               } elseif ( $this->summary !== '' ) {
-                                       $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
-                                       # This is a new section, so create a link to the new section
-                                       # in the revision summary.
-                                       $cleanSummary = $wgParser->stripSectionName( $this->summary );
-                                       $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
                                }
-                       } elseif ( $this->section != '' ) {
-                               # Try to get a section anchor from the section source, redirect to edited section if header found
-                               # XXX: might be better to integrate this into Article::replaceSection
-                               # for duplicate heading checking and maybe parsing
-                               $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
-                               # we can't deal with anchors, includes, html etc in the header for now,
-                               # headline would need to be parsed to improve this
-                               if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
-                                       $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
+
+                               # And a similar thing for new sections
+                               if ( $this->section == 'new' && !$this->allowBlankSummary ) {
+                                       if ( trim( $this->summary ) == '' ) {
+                                               $this->missingSummary = true;
+                                               $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
+                                               $status->value = self::AS_SUMMARY_NEEDED;
+                                               wfProfileOut( __METHOD__ );
+                                               return $status;
+                                       }
                                }
-                       }
-                       $result['sectionanchor'] = $sectionanchor;
-                       wfProfileOut( __METHOD__ . '-sectionanchor' );
 
-                       // Save errors may fall down to the edit form, but we've now
-                       // merged the section into full text. Clear the section field
-                       // so that later submission of conflict forms won't try to
-                       // replace that into a duplicated mess.
-                       $this->textbox1 = $text;
-                       $this->section = '';
+                               # All's well
+                               wfProfileIn( __METHOD__ . '-sectionanchor' );
+                               $sectionanchor = '';
+                               if ( $this->section == 'new' ) {
+                                       if ( $this->textbox1 == '' ) {
+                                               $this->missingComment = true;
+                                               $status->fatal( 'missingcommenttext' );
+                                               $status->value = self::AS_TEXTBOX_EMPTY;
+                                               wfProfileOut( __METHOD__ . '-sectionanchor' );
+                                               wfProfileOut( __METHOD__ );
+                                               return $status;
+                                       }
+                                       if ( $this->sectiontitle !== '' ) {
+                                               $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
+                                               // If no edit summary was specified, create one automatically from the section
+                                               // title and have it link to the new section. Otherwise, respect the summary as
+                                               // passed.
+                                               if ( $this->summary === '' ) {
+                                                       $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
+                                                       $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
+                                               }
+                                       } elseif ( $this->summary !== '' ) {
+                                               $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
+                                               # This is a new section, so create a link to the new section
+                                               # in the revision summary.
+                                               $cleanSummary = $wgParser->stripSectionName( $this->summary );
+                                               $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
+                                       }
+                               } elseif ( $this->section != '' ) {
+                                       # Try to get a section anchor from the section source, redirect to edited section if header found
+                                       # XXX: might be better to integrate this into Article::replaceSection
+                                       # for duplicate heading checking and maybe parsing
+                                       $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
+                                       # we can't deal with anchors, includes, html etc in the header for now,
+                                       # headline would need to be parsed to improve this
+                                       if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
+                                               $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
+                                       }
+                               }
+                               $result['sectionanchor'] = $sectionanchor;
+                               wfProfileOut( __METHOD__ . '-sectionanchor' );
+
+                               // Save errors may fall down to the edit form, but we've now
+                               // merged the section into full text. Clear the section field
+                               // so that later submission of conflict forms won't try to
+                               // replace that into a duplicated mess.
+                                       $this->textbox1 = $content->serialize( $this->content_format );
+                               $this->section = '';
 
-                       $status->value = self::AS_SUCCESS_UPDATE;
-               }
+                               $status->value = self::AS_SUCCESS_UPDATE;
+                       }
 
-               // Check for length errors again now that the section is merged in
-               $this->kblength = (int)( strlen( $text ) / 1024 );
-               if ( $this->kblength > $wgMaxArticleSize ) {
-                       $this->tooBig = true;
-                       $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
-                       wfProfileOut( __METHOD__ );
-                       return $status;
-               }
+                       // Check for length errors again now that the section is merged in
+                               $this->kblength = (int)( strlen( $content->serialize( $this->content_format ) ) / 1024 );
+                       if ( $this->kblength > $wgMaxArticleSize ) {
+                               $this->tooBig = true;
+                               $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
+                               wfProfileOut( __METHOD__ );
+                               return $status;
+                       }
 
-               $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
-                       ( $new ? EDIT_NEW : EDIT_UPDATE ) |
-                       ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
-                       ( $bot ? EDIT_FORCE_BOT : 0 );
+                       $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
+                               ( $new ? EDIT_NEW : EDIT_UPDATE ) |
+                               ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
+                               ( $bot ? EDIT_FORCE_BOT : 0 );
 
-               $doEditStatus = $this->mArticle->doEdit( $text, $this->summary, $flags );
+                               $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags, false, null, $this->content_format );
 
-               if ( $doEditStatus->isOK() ) {
-                       $result['redirect'] = Title::newFromRedirect( $text ) !== null;
-                       $this->commitWatch();
-                       wfProfileOut( __METHOD__ );
-                       return $status;
-               } else {
-                       // Failure from doEdit()
-                       // Show the edit conflict page for certain recognized errors from doEdit(),
-                       // but don't show it for errors from extension hooks
-                       $errors = $doEditStatus->getErrorsArray();
-                       if ( in_array( $errors[0][0], array( 'edit-gone-missing', 'edit-conflict',
-                               'edit-already-exists' ) ) )
-                       {
-                               $this->isConflict = true;
-                               // Destroys data doEdit() put in $status->value but who cares
-                               $doEditStatus->value = self::AS_END;
+                       if ( $doEditStatus->isOK() ) {
+                                       $result['redirect'] = $content->isRedirect();
+                               $this->commitWatch();
+                               wfProfileOut( __METHOD__ );
+                               return $status;
+                       } else {
+                               // Failure from doEdit()
+                               // Show the edit conflict page for certain recognized errors from doEdit(),
+                               // but don't show it for errors from extension hooks
+                               $errors = $doEditStatus->getErrorsArray();
+                               if ( in_array( $errors[0][0], array( 'edit-gone-missing', 'edit-conflict',
+                                       'edit-already-exists' ) ) )
+                               {
+                                       $this->isConflict = true;
+                                       // Destroys data doEdit() put in $status->value but who cares
+                                       $doEditStatus->value = self::AS_END;
+                               }
+                               wfProfileOut( __METHOD__ );
+                               return $doEditStatus;
                        }
+               } catch (MWContentSerializationException $ex) {
+                       $status->fatal( 'content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
+                       $status->value = self::AS_PARSE_ERROR;
                        wfProfileOut( __METHOD__ );
-                       return $doEditStatus;
+                       return $status;
                }
        }
 
@@ -1518,8 +1642,33 @@ class EditPage {
         * @param $editText string
         *
         * @return bool
+        * @deprecated since 1.WD, use mergeChangesIntoContent() instead
+        */
+       function mergeChangesInto( &$editText ){
+               wfDebug( __METHOD__, "1.WD" );
+
+               $editContent = ContentHandler::makeContent( $editText, $this->getTitle(), $this->content_model, $this->content_format );
+
+               $ok = $this->mergeChangesIntoContent( $editContent );
+
+               if ( $ok ) {
+                       $editText = $editContent->serialize( $this->content_format ); #XXX: really serialize?!
+                       return true;
+               } else {
+                       return false;
+               }
+       }
+
+       /**
+        * @private
+        * @todo document
+        *
+        * @parma $editText string
+        *
+        * @return bool
+        * @since since 1.WD
         */
-       function mergeChangesInto( &$editText ) {
+       private function mergeChangesIntoContent( &$editContent ){
                wfProfileIn( __METHOD__ );
 
                $db = wfGetDB( DB_MASTER );
@@ -1530,7 +1679,7 @@ class EditPage {
                        wfProfileOut( __METHOD__ );
                        return false;
                }
-               $baseText = $baseRevision->getText();
+               $baseContent = $baseRevision->getContent();
 
                // The current state, we want to merge updates into it
                $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
@@ -1538,11 +1687,14 @@ class EditPage {
                        wfProfileOut( __METHOD__ );
                        return false;
                }
-               $currentText = $currentRevision->getText();
+               $currentContent = $currentRevision->getContent();
+
+               $handler = ContentHandler::getForModelID( $baseContent->getModel() );
 
-               $result = '';
-               if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
-                       $editText = $result;
+               $result = $handler->merge3( $baseContent, $editContent, $currentContent );
+
+               if ( $result ) {
+                       $editContent = $result;
                        wfProfileOut( __METHOD__ );
                        return true;
                } else {
@@ -1789,6 +1941,7 @@ class EditPage {
                        }
                }
 
+               #FIXME: add EditForm plugin interface and use it here! #FIXME: search for textarea1 and textares2, and allow EditForm to override all uses.
                $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
                        'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
                        'enctype' => 'multipart/form-data' ) ) );
@@ -1853,6 +2006,9 @@ class EditPage {
 
                $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
 
+               $wgOut->addHTML( Html::hidden( 'format', $this->content_format ) );
+               $wgOut->addHTML( Html::hidden( 'model', $this->content_model ) );
+
                if ( $this->section == 'new' ) {
                        $this->showSummaryInput( true, $this->summary );
                        $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
@@ -1870,7 +2026,9 @@ class EditPage {
                        // resolved between page source edits and custom ui edits using the
                        // custom edit ui.
                        $this->textbox2 = $this->textbox1;
-                       $this->textbox1 = $this->getCurrentText();
+
+                       $content = $this->getCurrentContent();
+                       $this->textbox1 = $content->serialize( $this->content_format );
 
                        $this->showTextbox1();
                } else {
@@ -2278,10 +2436,10 @@ HTML
                $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
        }
 
-       protected function showTextbox( $content, $name, $customAttribs = array() ) {
+       protected function showTextbox( $text, $name, $customAttribs = array() ) {
                global $wgOut, $wgUser;
 
-               $wikitext = $this->safeUnicodeOutput( $content );
+               $wikitext = $this->safeUnicodeOutput( $text );
                if ( strval( $wikitext ) !== '' ) {
                        // Ensure there's a newline at the end, otherwise adding lines
                        // is awkward.
@@ -2365,24 +2523,43 @@ HTML
                        $oldtext = $this->mTitle->getDefaultMessageText();
                        if( $oldtext !== false ) {
                                $oldtitlemsg = 'defaultmessagetext';
+                               $oldContent = ContentHandler::makeContent( $oldtext, $this->mTitle );
+                       } else {
+                               $oldContent = null;
                        }
                } else {
-                       $oldtext = $this->mArticle->getRawText();
+                       $oldContent = $this->getOriginalContent();
                }
-               $newtext = $this->mArticle->replaceSection(
-                       $this->section, $this->textbox1, $this->summary, $this->edittime );
 
+               $textboxContent = ContentHandler::makeContent( $this->textbox1, $this->getTitle(),
+                                                                                                               $this->content_model, $this->content_format ); #XXX: handle parse errors ?
+
+               $newContent = $this->mArticle->replaceSectionContent(
+                                                                                       $this->section, $textboxContent,
+                                                                                       $this->summary, $this->edittime );
+
+               # hanlde legacy text-based hook
+               $newtext_orig = $newContent->serialize( $this->content_format );
+               $newtext = $newtext_orig; #clone
                wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
 
+               if ( $newtext != $newtext_orig ) {
+                                               #if the hook changed the text, create a new Content object accordingly.
+                                               $newContent = ContentHandler::makeContent( $newtext, $this->getTitle(), $newContent->getModel() ); #XXX: handle parse errors ?
+               }
+
+               wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
+
                $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
-               $newtext = $wgParser->preSaveTransform( $newtext, $this->mTitle, $wgUser, $popts );
+               $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
 
-               if ( $oldtext !== false  || $newtext != '' ) {
+               if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
                        $oldtitle = wfMsgExt( $oldtitlemsg, array( 'parseinline' ) );
                        $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
 
-                       $de = new DifferenceEngine( $this->mArticle->getContext() );
-                       $de->setText( $oldtext, $newtext );
+                       $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
+                       $de->setContent( $oldContent, $newContent );
+
                        $difftext = $de->getDiff( $oldtitle, $newtitle );
                        $de->showDiffStyle();
                } else {
@@ -2481,8 +2658,12 @@ HTML
                if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
                        $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
 
-                       $de = new DifferenceEngine( $this->mArticle->getContext() );
-                       $de->setText( $this->textbox2, $this->textbox1 );
+                       $content1 = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
+                       $content2 = ContentHandler::makeContent( $this->textbox2, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
+
+                       $handler = ContentHandler::getForModelID( $this->content_model );
+                       $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
+                       $de->setContent( $content2, $content1 );
                        $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
 
                        $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
@@ -2602,84 +2783,101 @@ HTML
                        return $parsedNote;
                }
 
-               if ( $this->mTriedSave && !$this->mTokenOk ) {
-                       if ( $this->mTokenOkExceptSuffix ) {
-                               $note = wfMsg( 'token_suffix_mismatch' );
-                       } else {
-                               $note = wfMsg( 'session_fail_preview' );
-                       }
-               } elseif ( $this->incompleteForm ) {
-                       $note = wfMsg( 'edit_form_incomplete' );
-               } else {
-                       $note = wfMsg( 'previewnote' ) .
-                               ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMsg( 'continue-editing' ) . ']]';
-               }
+               $note = '';
 
-               $parserOptions = ParserOptions::newFromUser( $wgUser );
-               $parserOptions->setEditSection( false );
-               $parserOptions->setTidy( true );
-               $parserOptions->setIsPreview( true );
-               $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
-
-               # don't parse non-wikitext pages, show message about preview
-               if ( $this->mTitle->isCssJsSubpage() || !$this->mTitle->isWikitextPage() ) {
-                       if ( $this->mTitle->isCssJsSubpage() ) {
-                               $level = 'user';
-                       } elseif ( $this->mTitle->isCssOrJsPage() ) {
-                               $level = 'site';
-                       } else {
-                               $level = false;
-                       }
+               try {
+                       $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
 
-                       # Used messages to make sure grep find them:
-                       # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
-                       $class = 'mw-code';
-                       if ( $level ) {
-                               if ( preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
-                                       $previewtext = "<div id='mw-{$level}csspreview'>\n" . wfMsg( "{$level}csspreview" ) . "\n</div>";
-                                       $class .= " mw-css";
-                               } elseif ( preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
-                                       $previewtext = "<div id='mw-{$level}jspreview'>\n" . wfMsg( "{$level}jspreview" ) . "\n</div>";
-                                       $class .= " mw-js";
+                       if ( $this->mTriedSave && !$this->mTokenOk ) {
+                               if ( $this->mTokenOkExceptSuffix ) {
+                                       $note = wfMsg( 'token_suffix_mismatch' );
                                } else {
-                                       throw new MWException( 'A CSS/JS (sub)page but which is not css nor js!' );
+                                       $note = wfMsg( 'session_fail_preview' );
                                }
-                               $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
-                               $previewHTML = $parserOutput->getText();
+                       } elseif ( $this->incompleteForm ) {
+                               $note = wfMsg( 'edit_form_incomplete' );
                        } else {
-                               $previewHTML = '';
-                       }
+                               $note = wfMsg( 'previewnote' ) .
+                                       ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMsg( 'continue-editing' ) . ']]';
+                       }
+
+                       $parserOptions = ParserOptions::newFromUser( $wgUser );
+                       $parserOptions->setEditSection( false );
+                       $parserOptions->setTidy( true );
+                       $parserOptions->setIsPreview( true );
+                       $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
+
+                       if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
+                               # don't parse non-wikitext pages, show message about preview
+                               if( $this->mTitle->isCssJsSubpage() ) {
+                                       $level = 'user';
+                               } elseif( $this->mTitle->isCssOrJsPage() ) {
+                                       $level = 'site';
+                               } else {
+                                       $level = false;
+                               }
 
-                       $previewHTML .= "<pre class=\"$class\" dir=\"ltr\">\n" . htmlspecialchars( $this->textbox1 ) . "\n</pre>\n";
-               } else {
-                       $toparse = $this->textbox1;
+                               if ( $content->getModel() == CONTENT_MODEL_CSS ) {
+                                       $format = 'css';
+                               } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
+                                       $format = 'js';
+                               } else {
+                                       $format = false;
+                               }
 
-                       # If we're adding a comment, we need to show the
-                       # summary as the headline
-                       if ( $this->section == "new" && $this->summary != "" ) {
-                               $toparse = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $toparse;
+                               # Used messages to make sure grep find them:
+                               # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
+                               if( $level && $format ) {
+                                       $note = "<div id='mw-{$level}{$format}preview'>" . wfMsg( "{$level}{$format}preview" ) . "</div>";
+                               } else {
+                                       $note = wfMsg( 'previewnote' );
+                               }
+                       } else {
+                               $note = wfMsg( 'previewnote' );
                        }
 
-                       wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
-
-                       $parserOptions->enableLimitReport();
-
-                       $toparse = $wgParser->preSaveTransform( $toparse, $this->mTitle, $wgUser, $parserOptions );
-                       $parserOutput = $wgParser->parse( $toparse, $this->mTitle, $parserOptions );
+                       $rt = $content->getRedirectChain();
 
-                       $rt = Title::newFromRedirectArray( $this->textbox1 );
                        if ( $rt ) {
                                $previewHTML = $this->mArticle->viewRedirect( $rt, false );
                        } else {
-                               $previewHTML = $parserOutput->getText();
-                       }
 
-                       $this->mParserOutput = $parserOutput;
-                       $wgOut->addParserOutputNoText( $parserOutput );
+                               # If we're adding a comment, we need to show the
+                               # summary as the headline
+                               if ( $this->section == "new" && $this->summary != "" ) {
+                                       $content = $content->addSectionHeader( $this->summary );
+                               }
+
+                               $toparse_orig = $content->serialize( $this->content_format );
+                               $toparse = $toparse_orig;
+                               wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
+
+                               if ( $toparse !== $toparse_orig ) {
+                                       #hook changed the text, create new Content object
+                                       $content = ContentHandler::makeContent( $toparse, $this->getTitle(), $this->content_model, $this->content_format );
+                               }
+
+                               wfRunHooks( 'EditPageGetPreviewContent', array( $this, &$content ) );
 
-                       if ( count( $parserOutput->getWarnings() ) ) {
-                               $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
+                               $parserOptions->enableLimitReport();
+
+                               #XXX: For CSS/JS pages, we should have called the ShowRawCssJs hook here. But it's now deprecated, so never mind
+                               $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
+
+                               // TODO: might be a saner way to get a meaningfull context here?
+                               $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
+
+                               $previewHTML = $parserOutput->getText();
+                               $this->mParserOutput = $parserOutput;
+                               $wgOut->addParserOutputNoText( $parserOutput );
+
+                               if ( count( $parserOutput->getWarnings() ) ) {
+                                       $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
+                               }
                        }
+               } catch (MWContentSerializationException $ex) {
+                       $note .= "\n\n" . wfMsg('content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
+                       $previewHTML = '';
                }
 
                if ( $this->isConflict ) {