When reading from meta's interwiki map, *.wikimedia.org should be set as local (e...
[lhc/web/wiklou.git] / includes / EditPage.php
index 88100c2..3a4d761 100644 (file)
@@ -23,13 +23,14 @@ class EditPage {
        var $formtype;
        var $firsttime;
        var $lastDelete;
+       var $mTokenOk = true;
 
        # Form values
        var $save = false, $preview = false, $diff = false;
        var $minoredit = false, $watchthis = false, $recreate = false;
        var $textbox1 = '', $textbox2 = '', $summary = '';
        var $edittime = '', $section = '', $starttime = '';
-       var $oldid = 0, $editintro = '';
+       var $oldid = 0, $editintro = '', $scrolltop = null;
 
        /**
         * @todo document
@@ -52,7 +53,7 @@ class EditPage {
                if ( !$wgUseMetadataEdit ) return ;
                if ( $wgMetadataWhitelist == '' ) return ;
                $s = '' ;
-               $t = $this->mArticle->getContent ( true ) ;
+               $t = $this->mArticle->getContent();
 
                # MISSING : <nowiki> filtering
 
@@ -89,7 +90,7 @@ class EditPage {
                $sat = array () ; # stand-alone-templates; must be lowercase
                $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
                $wl_article = new Article ( $wl_title ) ;
-               $wl = explode ( "\n" , $wl_article->getContent(true) ) ;
+               $wl = explode ( "\n" , $wl_article->getContent() ) ;
                foreach ( $wl AS $x )
                {
                        $isentry = false ;
@@ -141,10 +142,10 @@ class EditPage {
        }
 
        /**
-        * This is the function that gets called for "action=edit". It 
-        * sets up various member variables, then passes execution to 
+        * This is the function that gets called for "action=edit". It
+        * sets up various member variables, then passes execution to
         * another function, usually showEditForm()
-        * 
+        *
         * The edit form is self-submitting, so that when things like
         * preview and edit conflicts occur, we get the same form back
         * with the extra stuff added.  Only when the final submission
@@ -154,8 +155,12 @@ class EditPage {
        function edit() {
                global $wgOut, $wgUser, $wgRequest, $wgTitle;
 
+               if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
+                       return;
+
                $fname = 'EditPage::edit';
                wfProfileIn( $fname );
+               wfDebug( "$fname: enter\n" );
 
                // this is not an article
                $wgOut->setArticleFlag(false);
@@ -170,35 +175,47 @@ class EditPage {
                }
 
                if ( ! $this->mTitle->userCanEdit() ) {
-                       $wgOut->readOnlyPage( $this->mArticle->getContent( true ), true );
+                       wfDebug( "$fname: user can't edit\n" );
+                       $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
                        wfProfileOut( $fname );
                        return;
                }
+               wfDebug( "$fname: Checking blocks\n" );
                if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
                        # When previewing, don't check blocked state - will get caught at save time.
                        # Also, check when starting edition is done against slave to improve performance.
-                       $this->blockedIPpage();
+                       wfDebug( "$fname: user is blocked\n" );
+                       $wgOut->blockedPage();
                        wfProfileOut( $fname );
                        return;
                }
                if ( !$wgUser->isAllowed('edit') ) {
                        if ( $wgUser->isAnon() ) {
+                               wfDebug( "$fname: user must log in\n" );
                                $this->userNotLoggedInPage();
                                wfProfileOut( $fname );
                                return;
                        } else {
-                               $wgOut->readOnlyPage( $this->mArticle->getContent( true ), true );
+                               wfDebug( "$fname: read-only page\n" );
+                               $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
                                wfProfileOut( $fname );
                                return;
                        }
                }
+               if ( !$this->mTitle->userCan( 'create' ) && !$this->mTitle->exists() ) {
+                       wfDebug( "$fname: no create permission\n" );
+                       $this->noCreatePermission();
+                       wfProfileOut( $fname );
+                       return;
+               }
                if ( wfReadOnly() ) {
+                       wfDebug( "$fname: read-only mode is engaged\n" );
                        if( $this->save || $this->preview ) {
                                $this->formtype = 'preview';
                        } else if ( $this->diff ) {
                                $this->formtype = 'diff';
                        } else {
-                               $wgOut->readOnlyPage( $this->mArticle->getContent( true ) );
+                               $wgOut->readOnlyPage( $this->mArticle->getContent() );
                                wfProfileOut( $fname );
                                return;
                        }
@@ -221,11 +238,11 @@ class EditPage {
                }
 
                wfProfileIn( "$fname-business-end" );
-               
+
                $this->isConflict = false;
                // css / js subpages of user pages get a special treatment
                $this->isCssJsSubpage = $wgTitle->isCssJsSubpage();
-               
+
                /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
                 * no matter it's current state
                 */
@@ -246,7 +263,7 @@ class EditPage {
                                }
                        }
                }
-               
+
                if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
                        $this->showIntro();
                }
@@ -266,7 +283,7 @@ class EditPage {
                                return;
                        }
                }
-               
+
                # First time through: get contents, set time for conflict
                # checking, etc.
                if ( 'initial' == $this->formtype || $this->firsttime ) {
@@ -286,15 +303,17 @@ class EditPage {
         */
        function previewOnOpen() {
                global $wgUser;
-               return $wgUser->getOption( 'previewonfirst' ) ||
-                       ( $this->mTitle->getNamespace() == NS_CATEGORY &&
-                               !$this->mTitle->exists() );
+               return $this->section != 'new' &&
+                       ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
+                               ( $this->mTitle->getNamespace() == NS_CATEGORY &&
+                                       !$this->mTitle->exists() ) );
        }
 
        /**
         * @todo document
         */
        function importFormData( &$request ) {
+               global $wgLang ;
                $fname = 'EditPage::importFormData';
                wfProfileIn( $fname );
 
@@ -305,25 +324,36 @@ class EditPage {
                        $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
                        $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
                        $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
-                       $this->summary   =        $request->getText( 'wpSummary'  );
+                       # Truncate for whole multibyte characters. +5 bytes for ellipsis
+                       $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 
                        $this->edittime = $request->getVal( 'wpEdittime' );
                        $this->starttime = $request->getVal( 'wpStarttime' );
+
+                       $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
+
                        if( is_null( $this->edittime ) ) {
                                # If the form is incomplete, force to preview.
+                               wfDebug( "$fname: Form data appears to be incomplete\n" );
+                               wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
                                $this->preview  = true;
                        } else {
-                               if( $this->tokenOk( $request ) ) {
-                                       # Some browsers will not report any submit button
-                                       # if the user hits enter in the comment box.
-                                       # The unmarked state will be assumed to be a save,
-                                       # if the form seems otherwise complete.
-                                       $this->preview = $request->getCheck( 'wpPreview' );
-                                       $this->diff = $request->getCheck( 'wpDiff' );
-                               } else {
-                                       # Page might be a hack attempt posted from
-                                       # an external site. Preview instead of saving.
-                                       $this->preview = true;
+                               $this->preview = $request->getCheck( 'wpPreview' );
+                               $this->diff = $request->getCheck( 'wpDiff' );
+
+                               if( !$this->preview ) {
+                                       if ( $this->tokenOk( $request ) ) {
+                                               # Some browsers will not report any submit button
+                                               # if the user hits enter in the comment box.
+                                               # The unmarked state will be assumed to be a save,
+                                               # if the form seems otherwise complete.
+                                               wfDebug( "$fname: Passed token check.\n" );
+                                       } else {
+                                               # Page might be a hack attempt posted from
+                                               # an external site. Preview instead of saving.
+                                               wfDebug( "$fname: Failed token check; forcing preview\n" );
+                                               $this->preview = true;
+                                       }
                                }
                        }
                        $this->save    = ! ( $this->preview OR $this->diff );
@@ -334,13 +364,14 @@ class EditPage {
                        if( !preg_match( '/^\d{14}$/', $this->starttime )) {
                                $this->starttime = null;
                        }
-       
+
                        $this->recreate  = $request->getCheck( 'wpRecreate' );
 
                        $this->minoredit = $request->getCheck( 'wpMinoredit' );
                        $this->watchthis = $request->getCheck( 'wpWatchthis' );
                } else {
                        # Not a posted form? Start with nothing.
+                       wfDebug( "$fname: Not a posted form.\n" );
                        $this->textbox1  = '';
                        $this->textbox2  = '';
                        $this->mMetaData = '';
@@ -362,7 +393,7 @@ class EditPage {
 
                $this->live = $request->getCheck( 'live' );
                $this->editintro = $request->getText( 'editintro' );
-               
+
                wfProfileOut( $fname );
        }
 
@@ -378,10 +409,11 @@ class EditPage {
                if( $wgUser->isAnon() ) {
                        # Anonymous users may not have a session
                        # open. Don't tokenize.
-                       return true;
+                       $this->mTokenOk = true;
                } else {
-                       return $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
+                       $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
                }
+               return $this->mTokenOk;
        }
 
        function showIntro() {
@@ -398,7 +430,7 @@ class EditPage {
                        }
                }
                if($addstandardintro) {
-                       if ( $wgUser->isLoggedIn() ) 
+                       if ( $wgUser->isLoggedIn() )
                                $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
                        else
                                $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
@@ -411,7 +443,7 @@ class EditPage {
         */
        function attemptSave() {
                global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
-               
+
                $fname = 'EditPage::attemptSave';
                wfProfileIn( $fname );
                wfProfileIn( "$fname-checks" );
@@ -482,12 +514,20 @@ class EditPage {
                        wfProfileOut( $fname );
                        return true;
                }
-               
+
                wfProfileOut( "$fname-checks" );
-               
+
                # If article is new, insert it.
                $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
                if ( 0 == $aid ) {
+                       // Late check for create permission, just in case *PARANOIA*
+                       if ( !$this->mTitle->userCan( 'create' ) ) {
+                               wfDebug( "$fname: no create permission\n" );
+                               $this->noCreatePermission();
+                               wfProfileOut( $fname );
+                               return;
+                       }
+
                        # Don't save a new article if it's blank.
                        if ( ( '' == $this->textbox1 ) ) {
                                        $wgOut->redirect( $this->mTitle->getFullURL() );
@@ -498,7 +538,7 @@ class EditPage {
                        $isComment=($this->section=='new');
                        $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
                                $this->minoredit, $this->watchthis, false, $isComment);
-                       
+
                        wfProfileOut( $fname );
                        return false;
                }
@@ -508,10 +548,21 @@ class EditPage {
                $this->mArticle->clear(); # Force reload of dates, etc.
                $this->mArticle->forUpdate( true ); # Lock the article
 
-               if( ( $this->section != 'new' ) &&
-                       ($this->mArticle->getTimestamp() != $this->edittime ) ) 
-               {
+               if( $this->mArticle->getTimestamp() != $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( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
+                               } else {
+                                       // New comment; suppress conflict.
+                                       $this->isConflict = false;
+                                       wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
+                               }
+                       }
                }
                $userid = $wgUser->getID();
 
@@ -524,6 +575,11 @@ class EditPage {
                        wfDebug( "EditPage::editForm getting section '$this->section'\n" );
                        $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
                }
+               if( is_null( $text ) ) {
+                       wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
+                       $this->isConflict = true;
+                       $text = $this->textbox1;
+               }
 
                # Suppress edit conflict with self, except for section edits where merging is required.
                if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
@@ -544,12 +600,12 @@ class EditPage {
                                }
                        }
                }
-               
+
                if ( $this->isConflict ) {
                        wfProfileOut( $fname );
                        return true;
                }
-               
+
                # All's well
                wfProfileIn( "$fname-sectionanchor" );
                $sectionanchor = '';
@@ -595,8 +651,10 @@ class EditPage {
         */
        function initialiseForm() {
                $this->edittime = $this->mArticle->getTimestamp();
-               $this->textbox1 = $this->mArticle->getContent( true );
+               $this->textbox1 = $this->mArticle->getContent();
                $this->summary = '';
+               if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
+                       $this->textbox1 = wfMsgWeirdKey ( $this->mArticle->mTitle->getText() ) ;
                wfProxyCheck();
        }
 
@@ -607,13 +665,15 @@ class EditPage {
         *                      near the top, for captchas and the like.
         */
        function showEditForm( $formCallback=null ) {
-               global $wgOut, $wgUser, $wgAllowAnonymousMinor, $wgLang, $wgContLang;
+               global $wgOut, $wgUser, $wgLang, $wgContLang;
 
                $fname = 'EditPage::showEditForm';
                wfProfileIn( $fname );
 
                $sk =& $wgUser->getSkin();
-               
+
+               wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
+
                $wgOut->setRobotpolicy( 'noindex,nofollow' );
 
                # Enabled article-related sidebar, toplinks, etc.
@@ -625,7 +685,7 @@ class EditPage {
                        $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 
                        $this->textbox2 = $this->textbox1;
-                       $this->textbox1 = $this->mArticle->getContent( true );
+                       $this->textbox1 = $this->mArticle->getContent();
                        $this->edittime = $this->mArticle->getTimestamp();
                } else {
 
@@ -641,20 +701,19 @@ class EditPage {
                                                if( !empty( $matches[2] ) ) {
                                                        $this->summary = "/* ". trim($matches[2])." */ ";
                                                }
-                                       }                                       
+                                       }
                                }
                        } else {
                                $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
                        }
                        $wgOut->setPageTitle( $s );
                        if ( !$this->checkUnicodeCompliantBrowser() ) {
-                               $this->mArticle->setOldSubtitle();
                                $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
                        }
                        if ( isset( $this->mArticle )
                             && isset( $this->mArticle->mRevision )
                             && !$this->mArticle->mRevision->isCurrent() ) {
-                               $this->mArticle->setOldSubtitle();
+                               $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
                                $wgOut->addWikiText( wfMsg( 'editingold' ) );
                        }
                }
@@ -725,7 +784,7 @@ class EditPage {
 
                $minoredithtml = '';
 
-               if ( $wgUser->isLoggedIn() || $wgAllowAnonymousMinor ) {
+               if ( $wgUser->isAllowed('minoredit') ) {
                        $minoredithtml =
                                "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
                                " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
@@ -742,20 +801,11 @@ class EditPage {
                                        htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>";
                }
 
-               $checkboxhtml = $minoredithtml . $watchhtml . '<br />';
+               $checkboxhtml = $minoredithtml . $watchhtml;
 
-               $wgOut->addHTML( '<div id="wikiPreview">' );
-               if ( 'preview' == $this->formtype) {
-                       $previewOutput = $this->getPreviewText();
-                       if ( $wgUser->getOption('previewontop' ) ) {
-                               $wgOut->addHTML( $previewOutput );
-                               if($this->mTitle->getNamespace() == NS_CATEGORY) {
-                                       $this->mArticle->closeShowCategory();
-                               }
-                               $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
-                       }
+               if ( 'preview' == $this->formtype && $wgUser->getOption( 'previewontop' ) ) {
+                       $this->showPreview();
                }
-               $wgOut->addHTML( '</div>' );
                if ( 'diff' == $this->formtype ) {
                        if ( $wgUser->getOption('previewontop' ) ) {
                                $wgOut->addHTML( $this->getDiff() );
@@ -767,18 +817,18 @@ class EditPage {
                # Otherwise, show a summary field at the bottom
                $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
                if( $this->section == 'new' ) {
-                       $commentsubject="{$subject}: <input tabindex='1' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
+                       $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span> <div class='editOptions'><input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
                        $editsummary = '';
                } else {
                        $commentsubject = '';
-                       $editsummary="{$summary}: <input tabindex='2' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
+                       $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span> <div class='editOptions'><input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
                }
 
                # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
                if( !$this->preview && !$this->diff ) {
                        $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
                }
-               $templates = $this->getTemplatesUsed();
+               $templates = $this->formatTemplates();
 
                global $wgLivePreview;
                if ( $wgLivePreview ) {
@@ -792,7 +842,7 @@ class EditPage {
                        $metadata = $this->mMetaData ;
                        $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
                        $helppage = Title::newFromText( wfMsg( "metadata_page" ) ) ;
-                       $top = wfMsg( 'metadata', $helppage->getInternalURL() );
+                       $top = wfMsg( 'metadata', $helppage->getLocalURL() );
                        $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
                }
                else $metadata = "" ;
@@ -827,31 +877,53 @@ END
                if( is_callable( $formCallback ) ) {
                        call_user_func_array( $formCallback, array( &$wgOut ) );
                }
+
+               // Put these up at the top to ensure they aren't lost on early form submission
+               $wgOut->addHTML( "
+<input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
+<input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
+<input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
+<input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
+
                $wgOut->addHTML( <<<END
 $recreate
 {$commentsubject}
-<textarea tabindex='1' accesskey="," name="wpTextbox1" rows='{$rows}'
+<textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
 cols='{$cols}'{$ew} $hidden>
 END
 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
 "
 </textarea>
+
+               " );
+
+               $wgOut->addWikiText( $copywarn );
+
+               $wgOut->addHTML( "
 {$metadata}
-<br />{$editsummary}
+{$editsummary}
 {$checkboxhtml}
 {$safemodehtml}
+");
+
+               $wgOut->addHTML( "
+<div class='editButtons'>
 <input tabindex='5' id='wpSave' type='submit' value=\"{$save}\" name=\"wpSave\" accesskey=\"".wfMsg('accesskey-save')."\"".
 " title=\"".wfMsg('tooltip-save')."\"/>
 <input tabindex='6' id='wpPreview' type='submit' $liveOnclick value=\"{$prev}\" name=\"wpPreview\" accesskey=\"".wfMsg('accesskey-preview')."\"".
 " title=\"".wfMsg('tooltip-preview')."\"/>
 <input tabindex='7' id='wpDiff' type='submit' value=\"{$diff}\" name=\"wpDiff\" accesskey=\"".wfMsg('accesskey-diff')."\"".
-" title=\"".wfMsg('tooltip-diff')."\"/>
-<em>{$cancel}</em> | <em>{$edithelp}</em>{$templates}" );
-               $wgOut->addWikiText( $copywarn );
+" title=\"".wfMsg('tooltip-diff')."\"/> <span class='editHelp'>{$cancel} | {$edithelp}</span></div>
+</div>
+" );
+
+               $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
+
                $wgOut->addHTML( "
-<input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
-<input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
-<input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n" );
+<div class='templatesUsed'>
+{$templates}
+</div>
+" );
 
                if ( $wgUser->isLoggedIn() ) {
                        /**
@@ -870,8 +942,10 @@ END
                if ( $this->isConflict ) {
                        require_once( "DifferenceEngine.php" );
                        $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
-                       DifferenceEngine::showDiff( $this->textbox2, $this->textbox1,
-                         wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
+
+                       $de = new DifferenceEngine( $this->mTitle );
+                       $de->setText( $this->textbox2, $this->textbox1 );
+                       $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
 
                        $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
                        $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
@@ -879,7 +953,7 @@ END
                }
                $wgOut->addHTML( "</form>\n" );
                if ( $this->formtype == 'preview' && !$wgUser->getOption( 'previewontop' ) ) {
-                       $wgOut->addHTML( '<div id="wikiPreview">' . $previewOutput . '</div>' );
+                       $this->showPreview();
                }
                if ( $this->formtype == 'diff' && !$wgUser->getOption( 'previewontop' ) ) {
                        #$wgOut->addHTML( '<div id="wikiPreview">' . $difftext . '</div>' );
@@ -889,40 +963,66 @@ END
                wfProfileOut( $fname );
        }
 
+       /**
+        * Append preview output to $wgOut.
+        * Includes category rendering if this is a category page.
+        * @access private
+        */
+       function showPreview() {
+               global $wgOut;
+               $wgOut->addHTML( '<div id="wikiPreview">' );
+               if($this->mTitle->getNamespace() == NS_CATEGORY) {
+                       $this->mArticle->openShowCategory();
+               }
+               $previewOutput = $this->getPreviewText();
+               $wgOut->addHTML( $previewOutput );
+               if($this->mTitle->getNamespace() == NS_CATEGORY) {
+                       $this->mArticle->closeShowCategory();
+               }
+               $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
+               $wgOut->addHTML( '</div>' );
+       }
+
        /**
         * Prepare a list of templates used by this page. Returns HTML.
         */
-       function getTemplatesUsed() {
+       function formatTemplates() {
                global $wgUser;
 
-               $fname = 'EditPage::getTemplatesUsed';
+               $fname = 'EditPage::formatTemplates';
                wfProfileIn( $fname );
 
                $sk =& $wgUser->getSkin();
 
-               $templates = '';
-               $articleTemplates = $this->mArticle->getUsedTemplates();
-               if ( count( $articleTemplates ) > 0 ) {
-                       $templates = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
-                       foreach ( $articleTemplates as $tpl ) {
-                               if ( $titleObj = Title::makeTitle( NS_TEMPLATE, $tpl ) ) {
-                                       $templates .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
-                               }
+               $outText = '';
+               $templates = $this->mArticle->getUsedTemplates();
+               if ( count( $templates ) > 0 ) {
+                       # Do a batch existence check
+                       $batch = new LinkBatch;
+                       foreach( $templates as $title ) {
+                               $batch->addObj( $title );
                        }
-                       $templates .= '</ul>';
+                       $batch->execute();
+
+                       # Construct the HTML
+                       $outText = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
+                       foreach ( $templates as $titleObj ) {
+                               $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
+                       }
+                       $outText .= '</ul>';
                }
                wfProfileOut( $fname );
-               return $templates;
+               return $outText;
        }
 
        /**
         * Live Preview lets us fetch rendered preview page content and
         * add it to the page without refreshing the whole page.
-        * If not supported by the browser it will fall through to the normal form 
+        * If not supported by the browser it will fall through to the normal form
         * submission method.
-        * 
-        * This function outputs a script tag to support live preview, and 
-        * returns an onclick handler which should be added to the attributes 
+        *
+        * This function outputs a script tag to support live preview, and
+        * returns an onclick handler which should be added to the attributes
         * of the preview button
         */
        function doLivePreviewScript() {
@@ -936,7 +1036,7 @@ END
                        'editform.wpTextbox1.value,' .
                        htmlspecialchars( '"' . $liveAction . '"' ) . ')"';
        }
-       
+
        function getLastDelete() {
                $dbr =& wfGetDB( DB_SLAVE );
                $fname = 'EditPage::getLastDelete';
@@ -973,16 +1073,20 @@ END
         * @todo document
         */
        function getPreviewText() {
-               global $wgOut, $wgUser, $wgTitle, $wgParser, $wgAllowDiffPreview, $wgEnableDiffPreviewPreference;
+               global $wgOut, $wgUser, $wgTitle, $wgParser;
 
                $fname = 'EditPage::getPreviewText';
                wfProfileIn( $fname );
 
+               if ( $this->mTokenOk ) {
+                       $msg = 'previewnote';
+               } else {
+                       $msg = 'session_fail_preview';
+               }
                $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
-                       "<p class='previewnote'>" . htmlspecialchars( wfMsg( 'previewnote' ) ) . "</p>\n";
+                       "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
                if ( $this->isConflict ) {
-                       $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) .
-                               "</h2>\n";
+                       $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
                }
 
                $parserOptions = ParserOptions::newFromUser( $wgUser );
@@ -1004,26 +1108,24 @@ END
                } else {
                        # if user want to see preview when he edit an article
                        if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
-                               $this->textbox1 = $this->mArticle->getContent(true);
+                               $this->textbox1 = $this->mArticle->getContent();
                        }
 
                        $toparse = $this->textbox1;
-                       
+
                        # If we're adding a comment, we need to show the
                        # summary as the headline
                        if($this->section=="new" && $this->summary!="") {
                                $toparse="== {$this->summary} ==\n\n".$toparse;
                        }
-                       
+
                        if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
 
                        $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
                                        $wgTitle, $parserOptions );
 
-                       $previewHTML = $parserOutput->mText;
-
-                       $wgOut->addCategoryLinks($parserOutput->getCategoryLinks());
-                       $wgOut->addLanguageLinks($parserOutput->getLanguageLinks());
+                       $previewHTML = $parserOutput->getText();
+                       $wgOut->addParserOutputNoText( $parserOutput );
 
                        wfProfileOut( $fname );
                        return $previewhead . $previewHTML;
@@ -1034,26 +1136,8 @@ END
         * @todo document
         */
        function blockedIPpage() {
-               global $wgOut, $wgUser, $wgContLang;
-
-               $wgOut->setPageTitle( wfMsg( 'blockedtitle' ) );
-               $wgOut->setRobotpolicy( 'noindex,nofollow' );
-               $wgOut->setArticleRelated( false );
-
-               $id = $wgUser->blockedBy();
-               $reason = $wgUser->blockedFor();
-               $ip = wfGetIP();
-
-               if ( is_numeric( $id ) ) {
-                       $name = User::whoIs( $id );
-               } else {
-                       $name = $id;
-               }
-               $link = '[[' . $wgContLang->getNsText( NS_USER ) .
-                 ":{$name}|{$name}]]";
-
-               $wgOut->addWikiText( wfMsg( 'blockedtext', $link, $reason, $ip, $name ) );
-               $wgOut->returnToMain( false );
+               global $wgOut;
+               $wgOut->blockedPage();
        }
 
        /**
@@ -1125,9 +1209,19 @@ END
                }
        }
 
-
+       /**
+        * Check if the browser is on a blacklist of user-agents known to
+        * mangle UTF-8 data on form submission. Returns true if Unicode
+        * should make it through, false if it's known to be a problem.
+        * @return bool
+        * @access private
+        */
        function checkUnicodeCompliantBrowser() {
                global $wgBrowserBlackList;
+               if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
+                       // No User-Agent header sent? Trust it by default...
+                       return true;
+               }
                $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
                foreach ( $wgBrowserBlackList as $browser ) {
                        if ( preg_match($browser, $currentbrowser) ) {
@@ -1165,7 +1259,7 @@ END
         * The necessary JavaScript code can be found in style/wikibits.js.
         */
        function getEditToolbar() {
-               global $wgStylePath, $wgLang, $wgMimeType, $wgJsMimeType;
+               global $wgStylePath, $wgContLang, $wgJsMimeType;
 
                /**
                 * toolarray an array of arrays which each include the filename of
@@ -1215,14 +1309,14 @@ END
                                        'key'   =>      'H'
                                ),
                        array(  'image'=>'button_image.png',
-                                       'open'  =>      '[['.$wgLang->getNsText(NS_IMAGE).":",
+                                       'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
                                        'close' =>      ']]',
                                        'sample'=>      wfMsg('image_sample'),
                                        'tip'   =>      wfMsg('image_tip'),
                                        'key'   =>      'D'
                                ),
                        array(  'image' =>'button_media.png',
-                                       'open'  =>      '[['.$wgLang->getNsText(NS_MEDIA).':',
+                                       'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
                                        'close' =>      ']]',
                                        'sample'=>      wfMsg('media_sample'),
                                        'tip'   =>      wfMsg('media_tip'),
@@ -1315,14 +1409,20 @@ END
         * @return string HTML
         */
        function getDiff() {
+               global $wgUser;
+
                require_once( 'DifferenceEngine.php' );
                $oldtext = $this->mArticle->fetchContent();
                $newtext = $this->mArticle->replaceSection(
                        $this->section, $this->textbox1, $this->summary, $this->edittime );
                $oldtitle = wfMsg( 'currentrev' );
                $newtitle = wfMsg( 'yourtext' );
-               if ( $oldtext != wfMsg( 'noarticletext' ) || $newtext != '' ) {
-                       $difftext = DifferenceEngine::getDiff( $oldtext, $newtext, $oldtitle, $newtitle );
+               if ( $oldtext !== false  || $newtext != '' ) {
+                       $de = new DifferenceEngine( $this->mTitle );
+                       $de->setText( $oldtext, $newtext );
+                       $difftext = $de->getDiff( $oldtitle, $newtitle );
+               } else {
+                       $difftext = '';
                }
 
                return '<div id="wikiDiff">' . $difftext . '</div>';
@@ -1343,7 +1443,7 @@ END
                        ? $this->unmakesafe( $text )
                        : $text;
        }
-       
+
        /**
         * Filter an output field through a Unicode armoring process if it is
         * going to an old browser with known broken Unicode editing issues.
@@ -1359,7 +1459,7 @@ END
                        ? $codedText
                        : $this->makesafe( $codedText );
        }
-       
+
        /**
         * A number of web browsers are known to corrupt non-ASCII characters
         * in a UTF-8 text editing environment. To protect against this,
@@ -1376,7 +1476,7 @@ END
        function makesafe( $invalue ) {
                // Armor existing references for reversability.
                $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
-               
+
                $bytesleft = 0;
                $result = "";
                $working = 0;
@@ -1405,7 +1505,7 @@ END
                }
                return $result;
        }
-       
+
        /**
         * Reverse the previously applied transliteration of non-ASCII characters
         * back to UTF-8. Used to protect data from corruption by broken web browsers
@@ -1425,11 +1525,11 @@ END
                                        $hexstring .= $invalue{$i};
                                        $i++;
                                } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
-                               
+
                                // Do some sanity checks. These aren't needed for reversability,
-                               // but should help keep the breakage down if the editor 
+                               // but should help keep the breakage down if the editor
                                // breaks one of the entities whilst editing.
-                               if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) { 
+                               if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
                                        $codepoint = hexdec($hexstring);
                                        $result .= codepointToUtf8( $codepoint );
                                } else {
@@ -1442,7 +1542,12 @@ END
                // reverse the transform that we made for reversability reasons.
                return strtr( $result, array( "&#x0" => "&#x" ) );
        }
-       
+
+       function noCreatePermission() {
+               global $wgOut;
+               $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
+               $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
+       }
 
 }