MediaWiki 1.7.1 wiederhergestellt

1 files changed, 1864 insertions, 0 deletions

diff --git a/includes/EditPage.php b/includes/EditPage.php
new file mode 100644
index 00000000..d43a1202
--- /dev/null
+++ b/includes/EditPage.php
@@ -0,0 +1,1864 @@
+<?php
+/**
+ * Contain the EditPage class
+ * @package MediaWiki
+ */
+
+/**
+ * Splitting edit page/HTML interface from Article...
+ * The actual database and text munging is still in Article,
+ * but it should get easier to call those from alternate
+ * interfaces.
+ *
+ * @package MediaWiki
+ */
+
+class EditPage {
+	var $mArticle;
+	var $mTitle;
+	var $mMetaData = '';
+	var $isConflict = false;
+	var $isCssJsSubpage = false;
+	var $deletedSinceEdit = false;
+	var $formtype;
+	var $firsttime;
+	var $lastDelete;
+	var $mTokenOk = false;
+	var $mTriedSave = false;
+	var $tooBig = false;
+	var $kblength = false;
+	var $missingComment = false;
+	var $missingSummary = false;
+	var $allowBlankSummary = false;
+	var $autoSumm = '';
+	var $hookError = '';
+
+	# 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 = '', $scrolltop = null;
+
+	/**
+	 * @todo document
+	 * @param $article
+	 */
+	function EditPage( $article ) {
+		$this->mArticle =& $article;
+		global $wgTitle;
+		$this->mTitle =& $wgTitle;
+	}
+	
+	/**
+	 * Fetch initial editing page content.
+	 */
+	private function getContent() {
+		global $wgRequest, $wgParser;
+
+		# Get variables from query string :P
+		$section = $wgRequest->getVal( 'section' );
+		$preload = $wgRequest->getVal( 'preload' );
+
+		wfProfileIn( __METHOD__ );
+
+		$text = '';
+		if( !$this->mTitle->exists() ) {
+
+			# If requested, preload some text.
+			$text = $this->getPreloadedText( $preload );
+
+			# We used to put MediaWiki:Newarticletext here if
+			# $text was empty at this point.
+			# This is now shown above the edit box instead.
+		} else {
+			// FIXME: may be better to use Revision class directly
+			// But don't mess with it just yet. Article knows how to
+			// fetch the page record from the high-priority server,
+			// which is needed to guarantee we don't pick up lagged
+			// information.
+			
+			$text = $this->mArticle->getContent();
+			
+			if( $section != '' ) {
+				if( $section == 'new' ) {
+					$text = $this->getPreloadedText( $preload );
+				} else {
+					$text = $wgParser->getSection( $text, $section );
+				}
+			}
+		}
+		
+		wfProfileOut( __METHOD__ );
+		return $text;
+	}
+
+	/**
+	 * Get the contents of a page from its title and remove includeonly tags
+	 *
+	 * @param $preload String: the title of the page.
+	 * @return string The contents of the page.
+	 */
+	private function getPreloadedText($preload) {
+		if ( $preload === '' )
+			return '';
+		else {
+			$preloadTitle = Title::newFromText( $preload );
+			if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
+				$rev=Revision::newFromTitle($preloadTitle);
+				if ( is_object( $rev ) ) {
+					$text = $rev->getText();
+					// TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
+					// its own mini-parser! -ævar
+					$text = preg_replace( '~</?includeonly>~', '', $text );
+					return $text;
+				} else
+					return '';
+			}
+		}
+	}
+
+	/**
+	 * This is the function that extracts metadata from the article body on the first view.
+	 * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
+	 *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
+	 */
+	function extractMetaDataFromArticle () {
+		global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
+		$this->mMetaData = '' ;
+		if ( !$wgUseMetadataEdit ) return ;
+		if ( $wgMetadataWhitelist == '' ) return ;
+		$s = '' ;
+		$t = $this->getContent();
+
+		# MISSING : <nowiki> filtering
+
+		# Categories and language links
+		$t = explode ( "\n" , $t ) ;
+		$catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
+		$cat = $ll = array() ;
+		foreach ( $t AS $key => $x )
+		{
+			$y = trim ( strtolower ( $x ) ) ;
+			while ( substr ( $y , 0 , 2 ) == '[[' )
+			{
+				$y = explode ( ']]' , trim ( $x ) ) ;
+				$first = array_shift ( $y ) ;
+				$first = explode ( ':' , $first ) ;
+				$ns = array_shift ( $first ) ;
+				$ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
+				if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
+				{
+					$add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
+					if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
+					else $ll[] = $add ;
+					$x = implode ( ']]' , $y ) ;
+					$t[$key] = $x ;
+					$y = trim ( strtolower ( $x ) ) ;
+				}
+			}
+		}
+		if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
+		if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
+		$t = implode ( "\n" , $t ) ;
+
+		# Load whitelist
+		$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() ) ;
+		foreach ( $wl AS $x )
+		{
+			$isentry = false ;
+			$x = trim ( $x ) ;
+			while ( substr ( $x , 0 , 1 ) == '*' )
+			{
+				$isentry = true ;
+				$x = trim ( substr ( $x , 1 ) ) ;
+			}
+			if ( $isentry )
+			{
+				$sat[] = strtolower ( $x ) ;
+			}
+
+		}
+
+		# Templates, but only some
+		$t = explode ( '{{' , $t ) ;
+		$tl = array () ;
+		foreach ( $t AS $key => $x )
+		{
+			$y = explode ( '}}' , $x , 2 ) ;
+			if ( count ( $y ) == 2 )
+			{
+				$z = $y[0] ;
+				$z = explode ( '|' , $z ) ;
+				$tn = array_shift ( $z ) ;
+				if ( in_array ( strtolower ( $tn ) , $sat ) )
+				{
+					$tl[] = '{{' . $y[0] . '}}' ;
+					$t[$key] = $y[1] ;
+					$y = explode ( '}}' , $y[1] , 2 ) ;
+				}
+				else $t[$key] = '{{' . $x ;
+			}
+			else if ( $key != 0 ) $t[$key] = '{{' . $x ;
+			else $t[$key] = $x ;
+		}
+		if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
+		$t = implode ( '' , $t ) ;
+
+		$t = str_replace ( "\n\n\n" , "\n" , $t ) ;
+		$this->mArticle->mContent = $t ;
+		$this->mMetaData = $s ;
+	}
+
+	function submit() {
+		$this->edit();
+	}
+
+	/**
+	 * 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
+	 * is made and all is well do we actually save and redirect to
+	 * the newly-edited page.
+	 */
+	function edit() {
+		global $wgOut, $wgUser, $wgRequest, $wgTitle;
+		global $wgEmailConfirmToEdit;
+
+		if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
+			return;
+
+		$fname = 'EditPage::edit';
+		wfProfileIn( $fname );
+		wfDebug( "$fname: enter\n" );
+
+		// this is not an article
+		$wgOut->setArticleFlag(false);
+
+		$this->importFormData( $wgRequest );
+		$this->firsttime = false;
+
+		if( $this->live ) {
+			$this->livePreview();
+			wfProfileOut( $fname );
+			return;
+		}
+
+		if ( ! $this->mTitle->userCanEdit() ) {
+			wfDebug( "$fname: user can't edit\n" );
+			$wgOut->readOnlyPage( $this->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.
+			wfDebug( "$fname: user is blocked\n" );
+			$this->blockedPage();
+			wfProfileOut( $fname );
+			return;
+		}
+		if ( !$wgUser->isAllowed('edit') ) {
+			if ( $wgUser->isAnon() ) {
+				wfDebug( "$fname: user must log in\n" );
+				$this->userNotLoggedInPage();
+				wfProfileOut( $fname );
+				return;
+			} else {
+				wfDebug( "$fname: read-only page\n" );
+				$wgOut->readOnlyPage( $this->getContent(), true );
+				wfProfileOut( $fname );
+				return;
+			}
+		}
+		if ($wgEmailConfirmToEdit && !$wgUser->isEmailConfirmed()) {
+			wfDebug("$fname: user must confirm e-mail address\n");
+			$this->userNotConfirmedPage();
+			wfProfileOut($fname);
+			return;
+		}
+		if ( !$this->mTitle->userCanCreate() && !$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->getContent() );
+				wfProfileOut( $fname );
+				return;
+			}
+		} else {
+			if ( $this->save ) {
+				$this->formtype = 'save';
+			} else if ( $this->preview ) {
+				$this->formtype = 'preview';
+			} else if ( $this->diff ) {
+				$this->formtype = 'diff';
+			} else { # First time through
+				$this->firsttime = true;
+				if( $this->previewOnOpen() ) {
+					$this->formtype = 'preview';
+				} else {
+					$this->extractMetaDataFromArticle () ;
+					$this->formtype = 'initial';
+				}
+			}
+		}
+
+		wfProfileIn( "$fname-business-end" );
+
+		$this->isConflict = false;
+		// css / js subpages of user pages get a special treatment
+		$this->isCssJsSubpage      = $wgTitle->isCssJsSubpage();
+		$this->isValidCssJsSubpage = $wgTitle->isValidCssJsSubpage();
+
+		/* Notice that we can't use isDeleted, because it returns true if article is ever deleted
+		 * no matter it's current state
+		 */
+		$this->deletedSinceEdit = false;
+		if ( $this->edittime != '' ) {
+			/* Note that we rely on logging table, which hasn't been always there,
+			 * but that doesn't matter, because this only applies to brand new
+			 * deletes. This is done on every preview and save request. Move it further down
+			 * to only perform it on saves
+			 */
+			if ( $this->mTitle->isDeleted() ) {
+				$this->lastDelete = $this->getLastDelete();
+				if ( !is_null($this->lastDelete) ) {
+					$deletetime = $this->lastDelete->log_timestamp;
+					if ( ($deletetime - $this->starttime) > 0 ) {
+						$this->deletedSinceEdit = true;
+					}
+				}
+			}
+		}
+
+		if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
+			$this->showIntro();
+		}
+		if( $this->mTitle->isTalkPage() ) {
+			$wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
+		}
+
+		# Attempt submission here.  This will check for edit conflicts,
+		# and redundantly check for locked database, blocked IPs, etc.
+		# that edit() already checked just in case someone tries to sneak
+		# in the back door with a hand-edited submission URL.
+
+		if ( 'save' == $this->formtype ) {
+			if ( !$this->attemptSave() ) {
+				wfProfileOut( "$fname-business-end" );
+				wfProfileOut( $fname );
+				return;
+			}
+		}
+
+		# First time through: get contents, set time for conflict
+		# checking, etc.
+		if ( 'initial' == $this->formtype || $this->firsttime ) {
+			$this->initialiseForm();
+			if( !$this->mTitle->getArticleId() ) 
+				wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
+		}
+
+		$this->showEditForm();
+		wfProfileOut( "$fname-business-end" );
+		wfProfileOut( $fname );
+	}
+
+	/**
+	 * Return true if this page should be previewed when the edit form
+	 * is initially opened.
+	 * @return bool
+	 * @private
+	 */
+	function previewOnOpen() {
+		global $wgUser;
+		return $this->section != 'new' &&
+			( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
+				( $this->mTitle->getNamespace() == NS_CATEGORY &&
+					!$this->mTitle->exists() ) );
+	}
+
+	/**
+	 * @todo document
+	 * @param $request
+	 */
+	function importFormData( &$request ) {
+		global $wgLang, $wgUser;
+		$fname = 'EditPage::importFormData';
+		wfProfileIn( $fname );
+
+		if( $request->wasPosted() ) {
+			# These fields need to be checked for encoding.
+			# Also remove trailing whitespace, but don't remove _initial_
+			# whitespace from the text boxes. This may be significant formatting.
+			$this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
+			$this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
+			$this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
+			# 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 {
+				/* Fallback for live preview */
+				$this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
+				$this->diff = $request->getCheck( 'wpDiff' );
+
+				// Remember whether a save was requested, so we can indicate
+				// if we forced preview due to session failure.
+				$this->mTriedSave = !$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 $this->diff );
+			if( !preg_match( '/^\d{14}$/', $this->edittime )) {
+				$this->edittime = null;
+			}
+
+			if( !preg_match( '/^\d{14}$/', $this->starttime )) {
+				$this->starttime = null;
+			}
+
+			$this->recreate  = $request->getCheck( 'wpRecreate' );
+
+			$this->minoredit = $request->getCheck( 'wpMinoredit' );
+			$this->watchthis = $request->getCheck( 'wpWatchthis' );
+
+			# Don't force edit summaries when a user is editing their own user or talk page
+			if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
+				$this->allowBlankSummary = true;
+			} else {
+				$this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
+			}
+	
+			$this->autoSumm = $request->getText( 'wpAutoSummary' );			
+		} else {
+			# Not a posted form? Start with nothing.
+			wfDebug( "$fname: Not a posted form.\n" );
+			$this->textbox1  = '';
+			$this->textbox2  = '';
+			$this->mMetaData = '';
+			$this->summary   = '';
+			$this->edittime  = '';
+			$this->starttime = wfTimestampNow();
+			$this->preview   = false;
+			$this->save      = false;
+			$this->diff	 = false;
+			$this->minoredit = false;
+			$this->watchthis = false;
+			$this->recreate  = false;
+		}
+
+		$this->oldid = $request->getInt( 'oldid' );
+
+		# Section edit can come from either the form or a link
+		$this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
+
+		$this->live = $request->getCheck( 'live' );
+		$this->editintro = $request->getText( 'editintro' );
+
+		wfProfileOut( $fname );
+	}
+
+	/**
+	 * Make sure the form isn't faking a user's credentials.
+	 *
+	 * @param $request WebRequest
+	 * @return bool
+	 * @private
+	 */
+	function tokenOk( &$request ) {
+		global $wgUser;
+		if( $wgUser->isAnon() ) {
+			# Anonymous users may not have a session
+			# open. Don't tokenize.
+			$this->mTokenOk = true;
+		} else {
+			$this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
+		}
+		return $this->mTokenOk;
+	}
+
+	/** */
+	function showIntro() {
+		global $wgOut, $wgUser;
+		$addstandardintro=true;
+		if($this->editintro) {
+			$introtitle=Title::newFromText($this->editintro);
+			if(isset($introtitle) && $introtitle->userCanRead()) {
+				$rev=Revision::newFromTitle($introtitle);
+				if($rev) {
+					$wgOut->addSecondaryWikiText($rev->getText());
+					$addstandardintro=false;
+				}
+			}
+		}
+		if($addstandardintro) {
+			if ( $wgUser->isLoggedIn() )
+				$wgOut->addWikiText( wfMsg( 'newarticletext' ) );
+			else
+				$wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
+		}
+	}
+
+	/**
+	 * Attempt submission
+	 * @return bool false if output is done, true if the rest of the form should be displayed
+	 */
+	function attemptSave() {
+		global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
+		global $wgMaxArticleSize;
+
+		$fname = 'EditPage::attemptSave';
+		wfProfileIn( $fname );
+		wfProfileIn( "$fname-checks" );
+
+		# Reintegrate metadata
+		if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
+		$this->mMetaData = '' ;
+
+		# Check for spam
+		if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
+			$this->spamPage ( $matches[0] );
+			wfProfileOut( "$fname-checks" );
+			wfProfileOut( $fname );
+			return false;
+		}
+		if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
+			# Error messages or other handling should be performed by the filter function
+			wfProfileOut( $fname );
+			wfProfileOut( "$fname-checks" );
+			return false;
+		}
+		if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError ) ) ) {
+			# Error messages etc. could be handled within the hook...
+			wfProfileOut( $fname );
+			wfProfileOut( "$fname-checks" );
+			return false;
+		} elseif( $this->hookError != '' ) {
+			# ...or the hook could be expecting us to produce an error
+			wfProfileOut( "$fname-checks " );
+			wfProfileOut( $fname );
+			return true;
+		}
+		if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
+			# Check block state against master, thus 'false'.
+			$this->blockedPage();
+			wfProfileOut( "$fname-checks" );
+			wfProfileOut( $fname );
+			return false;
+		}
+		$this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
+		if ( $this->kblength > $wgMaxArticleSize ) {
+			// Error will be displayed by showEditForm()
+			$this->tooBig = true;
+			wfProfileOut( "$fname-checks" );
+			wfProfileOut( $fname );
+			return true;
+		}
+		
+		if ( !$wgUser->isAllowed('edit') ) {
+			if ( $wgUser->isAnon() ) {
+				$this->userNotLoggedInPage();
+				wfProfileOut( "$fname-checks" );
+				wfProfileOut( $fname );
+				return false;
+			}
+			else {
+				$wgOut->readOnlyPage();
+				wfProfileOut( "$fname-checks" );
+				wfProfileOut( $fname );
+				return false;
+			}
+		}
+
+		if ( wfReadOnly() ) {
+			$wgOut->readOnlyPage();
+			wfProfileOut( "$fname-checks" );
+			wfProfileOut( $fname );
+			return false;
+		}
+		if ( $wgUser->pingLimiter() ) {
+			$wgOut->rateLimited();
+			wfProfileOut( "$fname-checks" );
+			wfProfileOut( $fname );
+			return false;
+		}
+
+		# If the article has been deleted while editing, don't save it without
+		# confirmation
+		if ( $this->deletedSinceEdit && !$this->recreate ) {
+			wfProfileOut( "$fname-checks" );
+			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->userCanCreate() ) {
+				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() );
+					wfProfileOut( $fname );
+					return false;
+			}
+
+			# If no edit comment was given when creating a new page, and what's being
+			# created is a redirect, be smart and fill in a neat auto-comment
+			if( $this->summary == '' ) {
+				$rt = Title::newFromRedirect( $this->textbox1 );
+				if( is_object( $rt ) )
+					$this->summary = wfMsgForContent( 'autoredircomment', $rt->getPrefixedText() );
+			}
+
+			$isComment=($this->section=='new');
+			$this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
+				$this->minoredit, $this->watchthis, false, $isComment);
+
+			wfProfileOut( $fname );
+			return false;
+		}
+
+		# Article exists. Check for edit conflict.
+
+		$this->mArticle->clear(); # Force reload of dates, etc.
+		$this->mArticle->forUpdate( true ); # Lock the article
+
+		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();
+
+		if ( $this->isConflict) {
+			wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
+				$this->mArticle->getTimestamp() . "'\n" );
+			$text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
+		}
+		else {
+			wfDebug( "EditPage::editForm getting section '$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 ) ) {
+			wfDebug( "Suppressing edit conflict, same user.\n" );
+			$this->isConflict = false;
+		} else {
+			# switch from section editing to normal editing in edit conflict
+			if($this->isConflict) {
+				# Attempt merge
+				if( $this->mergeChangesInto( $text ) ){
+					// Successful merge! Maybe we should tell the user the good news?
+					$this->isConflict = false;
+					wfDebug( "Suppressing edit conflict, successful merge.\n" );
+				} else {
+					$this->section = '';
+					$this->textbox1 = $text;
+					wfDebug( "Keeping edit conflict, failed merge.\n" );
+				}
+			}
+		}
+
+		if ( $this->isConflict ) {
+			wfProfileOut( $fname );
+			return true;
+		}
+
+		# If no edit comment was given when turning a page into a redirect, be smart
+		# and fill in a neat auto-comment
+		if( $this->summary == '' ) {
+			$rt = Title::newFromRedirect( $this->textbox1 );
+			if( is_object( $rt ) )
+				$this->summary = wfMsgForContent( 'autoredircomment', $rt->getPrefixedText() );
+		}
+
+		# Handle the user preference to force summaries here
+		if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
+			if( md5( $this->summary ) == $this->autoSumm ) {
+				$this->missingSummary = true;
+				wfProfileOut( $fname );
+				return( true );
+			}
+		}
+
+		# All's well
+		wfProfileIn( "$fname-sectionanchor" );
+		$sectionanchor = '';
+		if( $this->section == 'new' ) {
+			if ( $this->textbox1 == '' ) {
+				$this->missingComment = true;
+				return true;
+			}
+			if( $this->summary != '' ) {
+				$sectionanchor = $this->sectionAnchor( $this->summary );
+			}
+		} 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 and strlen($matches[2]) > 0) {
+				$sectionanchor = $this->sectionAnchor( $matches[2] );
+			}
+		}
+		wfProfileOut( "$fname-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 = '';
+
+		// 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;
+			wfProfileOut( $fname );
+			return true;
+		}
+
+		# update the article here
+		if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
+			$this->watchthis, '', $sectionanchor ) ) {
+			wfProfileOut( $fname );
+			return false;
+		} else {
+			$this->isConflict = true;
+		}
+		wfProfileOut( $fname );
+		return true;
+	}
+
+	/**
+	 * Initialise form fields in the object
+	 * Called on the first invocation, e.g. when a user clicks an edit link
+	 */
+	function initialiseForm() {
+		$this->edittime = $this->mArticle->getTimestamp();
+		$this->textbox1 = $this->getContent();
+		$this->summary = '';
+		if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
+			$this->textbox1 = wfMsgWeirdKey( $this->mArticle->mTitle->getText() ) ;
+		wfProxyCheck();
+	}
+
+	/**
+	 * Send the edit form and related headers to $wgOut
+	 * @param $formCallback Optional callable that takes an OutputPage
+	 *                      parameter; will be called during form output
+	 *                      near the top, for captchas and the like.
+	 */
+	function showEditForm( $formCallback=null ) {
+		global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
+
+		$fname = 'EditPage::showEditForm';
+		wfProfileIn( $fname );
+
+		$sk =& $wgUser->getSkin();
+
+		wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
+
+		$wgOut->setRobotpolicy( 'noindex,nofollow' );
+
+		# Enabled article-related sidebar, toplinks, etc.
+		$wgOut->setArticleRelated( true );
+
+		if ( $this->isConflict ) {
+			$s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
+			$wgOut->setPageTitle( $s );
+			$wgOut->addWikiText( wfMsg( 'explainconflict' ) );
+
+			$this->textbox2 = $this->textbox1;
+			$this->textbox1 = $this->getContent();
+			$this->edittime = $this->mArticle->getTimestamp();
+		} else {
+
+			if( $this->section != '' ) {
+				if( $this->section == 'new' ) {
+					$s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
+				} else {
+					$s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
+					if( !$this->preview && !$this->diff ) {
+						preg_match( "/^(=+)(.+)\\1/mi",
+							$this->textbox1,
+							$matches );
+						if( !empty( $matches[2] ) ) {
+							$this->summary = "/* ". trim($matches[2])." */ ";
+						}
+					}
+				}
+			} else {
+				$s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
+			}
+			$wgOut->setPageTitle( $s );
+
+			if ( $this->missingComment ) {
+				$wgOut->addWikiText( wfMsg( 'missingcommenttext' ) );
+			}
+			
+			if( $this->missingSummary ) {
+				$wgOut->addWikiText( wfMsg( 'missingsummary' ) );
+			}
+			
+			if( !$this->hookError == '' ) {
+				$wgOut->addWikiText( $this->hookError );
+			}
+
+			if ( !$this->checkUnicodeCompliantBrowser() ) {
+				$wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
+			}
+			if ( isset( $this->mArticle )
+			     && isset( $this->mArticle->mRevision )
+			     && !$this->mArticle->mRevision->isCurrent() ) {
+				$this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
+				$wgOut->addWikiText( wfMsg( 'editingold' ) );
+			}
+		}
+
+		if( wfReadOnly() ) {
+			$wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
+		} elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
+			$wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
+		} else {
+			if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
+				# Check the skin exists
+				if( $this->isValidCssJsSubpage ) {
+					$wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
+				} else {
+					$wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
+				}
+			}
+		}
+			
+		if( $this->mTitle->isProtected( 'edit' ) ) {
+			# Is the protection due to the namespace, e.g. interface text?
+			if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
+				# Yes; remind the user
+				$notice = wfMsg( 'editinginterface' );
+			} elseif( $this->mTitle->isSemiProtected() ) {
+				# No; semi protected
+				$notice = wfMsg( 'semiprotectedpagewarning' );
+				if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
+					$notice = '';
+				}
+			} else {
+				# No; regular protection
+				$notice = wfMsg( 'protectedpagewarning' );
+			}
+			$wgOut->addWikiText( $notice );
+		}
+
+		if ( $this->kblength === false ) {
+			$this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
+		}
+		if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
+			$wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
+		} elseif( $this->kblength > 29 ) {
+			$wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
+		}
+
+		$rows = $wgUser->getIntOption( 'rows' );
+		$cols = $wgUser->getIntOption( 'cols' );
+
+		$ew = $wgUser->getOption( 'editwidth' );
+		if ( $ew ) $ew = " style=\"width:100%\"";
+		else $ew = '';
+
+		$q = 'action=submit';
+		#if ( "no" == $redirect ) { $q .= "&redirect=no"; }
+		$action = $this->mTitle->escapeLocalURL( $q );
+
+		$summary = wfMsg('summary');
+		$subject = wfMsg('subject');
+		$minor   = wfMsgExt('minoredit', array('parseinline'));
+		$watchthis = wfMsgExt('watchthis', array('parseinline'));
+
+		$cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
+				wfMsgExt('cancel', array('parseinline')) );
+		$edithelpurl = $sk->makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
+		$edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
+			htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
+			htmlspecialchars( wfMsg( 'newwindow' ) );
+
+		global $wgRightsText;
+		$copywarn = "<div id=\"editpage-copywarn\">\n" .
+			wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
+				'[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
+				$wgRightsText ) . "\n</div>";
+
+		if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
+			# prepare toolbar for edit buttons
+			$toolbar = $this->getEditToolbar();
+		} else {
+			$toolbar = '';
+		}
+
+		// activate checkboxes if user wants them to be always active
+		if( !$this->preview && !$this->diff ) {
+			# Sort out the "watch" checkbox
+			if( $wgUser->getOption( 'watchdefault' ) ) {
+				# Watch all edits
+				$this->watchthis = true;
+			} elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
+				# Watch creations
+				$this->watchthis = true;
+			} elseif( $this->mTitle->userIsWatching() ) {
+				# Already watched
+				$this->watchthis = true;
+			}
+			
+			if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
+		}
+
+		$minoredithtml = '';
+
+		if ( $wgUser->isAllowed('minoredit') ) {
+			$minoredithtml =
+				"<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
+				" accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />\n".
+				"<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>\n";
+		}
+
+		$watchhtml = '';
+
+		if ( $wgUser->isLoggedIn() ) {
+			$watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
+				($this->watchthis?" checked='checked'":"").
+				" accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />\n".
+				"<label for='wpWatchthis' title=\"" .
+					htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>\n";
+		}
+
+		$checkboxhtml = $minoredithtml . $watchhtml;
+
+		if ( $wgUser->getOption( 'previewontop' ) ) {
+
+			if ( 'preview' == $this->formtype ) {
+				$this->showPreview();
+			} else {
+				$wgOut->addHTML( '<div id="wikiPreview"></div>' );
+			}
+
+			if ( 'diff' == $this->formtype ) {
+				$wgOut->addHTML( $this->getDiff() );
+			}
+		}
+
+
+		# if this is a comment, show a subject line at the top, which is also the edit summary.
+		# Otherwise, show a summary field at the bottom
+		$summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
+		if( $this->section == 'new' ) {
+			$commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span>\n<div class='editOptions'>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
+			$editsummary = '';
+		} else {
+			$commentsubject = '';
+			$editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span>\n<div class='editOptions'>\n<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->formatTemplates();
+
+		global $wgUseMetadataEdit ;
+		if ( $wgUseMetadataEdit ) {
+			$metadata = $this->mMetaData ;
+			$metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
+			$top = wfMsgWikiHtml( 'metadata_help' );
+			$metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
+		}
+		else $metadata = "" ;
+
+		$hidden = '';
+		$recreate = '';
+		if ($this->deletedSinceEdit) {
+			if ( 'save' != $this->formtype ) {
+				$wgOut->addWikiText( wfMsg('deletedwhileediting'));
+			} else {
+				// Hide the toolbar and edit area, use can click preview to get it back
+				// Add an confirmation checkbox and explanation.
+				$toolbar = '';
+				$hidden = 'type="hidden" style="display:none;"';
+				$recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
+				$recreate .=
+					"<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
+					"<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
+			}
+		}
+
+		$temp = array(
+			'id'        => 'wpSave',
+			'name'      => 'wpSave',
+			'type'      => 'submit',
+			'tabindex'  => '5',
+			'value'     => wfMsg('savearticle'),
+			'accesskey' => wfMsg('accesskey-save'),
+			'title'     => wfMsg('tooltip-save'),
+		);
+		$buttons['save'] = wfElement('input', $temp, '');
+		$temp = array(
+			'id'        => 'wpDiff',
+			'name'      => 'wpDiff',
+			'type'      => 'submit',
+			'tabindex'  => '7',
+			'value'     => wfMsg('showdiff'),
+			'accesskey' => wfMsg('accesskey-diff'),
+			'title'     => wfMsg('tooltip-diff'),
+		);
+		$buttons['diff'] = wfElement('input', $temp, '');
+
+		global $wgLivePreview;
+		if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
+			$temp = array(
+				'id'        => 'wpPreview',
+				'name'      => 'wpPreview',
+				'type'      => 'submit',
+				'tabindex'  => '6',
+				'value'     => wfMsg('showpreview'),
+				'accesskey' => '',
+				'title'     => wfMsg('tooltip-preview'),
+				'style'     => 'display: none;',
+			);
+			$buttons['preview'] = wfElement('input', $temp, '');
+			$temp = array(
+				'id'        => 'wpLivePreview',
+				'name'      => 'wpLivePreview',
+				'type'      => 'submit',
+				'tabindex'  => '6',
+				'value'     => wfMsg('showlivepreview'),
+				'accesskey' => wfMsg('accesskey-preview'),
+				'title'     => '',
+				'onclick'   => $this->doLivePreviewScript(),
+			);
+			$buttons['live'] = wfElement('input', $temp, '');
+		} else {
+			$temp = array(
+				'id'        => 'wpPreview',
+				'name'      => 'wpPreview',
+				'type'      => 'submit',
+				'tabindex'  => '6',
+				'value'     => wfMsg('showpreview'),
+				'accesskey' => wfMsg('accesskey-preview'),
+				'title'     => wfMsg('tooltip-preview'),
+			);
+			$buttons['preview'] = wfElement('input', $temp, '');
+			$buttons['live'] = '';
+		}
+
+		$safemodehtml = $this->checkUnicodeCompliantBrowser()
+			? ""
+			: "<input type='hidden' name=\"safemode\" value='1' />\n";
+
+		$wgOut->addHTML( <<<END
+{$toolbar}
+<form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
+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
+{$commentsubject}
+<textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
+cols='{$cols}'{$ew} $hidden>
+END
+. htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
+"
+</textarea>
+		" );
+
+		$wgOut->addWikiText( $copywarn );
+		$wgOut->addHTML( "
+{$metadata}
+{$editsummary}
+{$checkboxhtml}
+{$safemodehtml}
+");
+
+		$wgOut->addHTML(
+"<div class='editButtons'>
+	{$buttons['save']}
+	{$buttons['preview']}
+	{$buttons['live']}
+	{$buttons['diff']}
+	<span class='editHelp'>{$cancel} | {$edithelp}</span>
+</div><!-- editButtons -->
+</div><!-- editOptions -->");
+
+		$wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
+
+		$wgOut->addHTML( "
+<div class='templatesUsed'>
+{$templates}
+</div>
+" );
+
+		if ( $wgUser->isLoggedIn() ) {
+			/**
+			 * To make it harder for someone to slip a user a page
+			 * which submits an edit form to the wiki without their
+			 * knowledge, a random token is associated with the login
+			 * session. If it's not passed back with the submission,
+			 * we won't save the page, or render user JavaScript and
+			 * CSS previews.
+			 */
+			$token = htmlspecialchars( $wgUser->editToken() );
+			$wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
+		}
+
+		# If a blank edit summary was previously provided, and the appropriate
+		# user preference is active, pass a hidden tag here. This will stop the
+		# user being bounced back more than once in the event that a summary
+		# is not required.
+		if( $this->missingSummary ) {
+			$wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
+		}
+		
+		# For a bit more sophisticated detection of blank summaries, hash the
+		# automatic one and pass that in a hidden field.
+		$autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
+		$wgOut->addHtml( wfHidden( 'wpAutoSummary', $autosumm ) );
+
+		if ( $this->isConflict ) {
+			require_once( "DifferenceEngine.php" );
+			$wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
+
+			$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'>"
+				. htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
+		}
+		$wgOut->addHTML( "</form>\n" );
+		if ( !$wgUser->getOption( 'previewontop' ) ) {
+
+			if ( $this->formtype == 'preview') {
+				$this->showPreview();
+			} else {
+				$wgOut->addHTML( '<div id="wikiPreview"></div>' );
+			}
+		
+			if ( $this->formtype == 'diff') {
+				$wgOut->addHTML( $this->getDiff() );
+			}
+
+		}
+
+		wfProfileOut( $fname );
+	}
+
+	/**
+	 * Append preview output to $wgOut.
+	 * Includes category rendering if this is a category page.
+	 * @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 formatTemplates() {
+		global $wgUser;
+
+		$fname = 'EditPage::formatTemplates';
+		wfProfileIn( $fname );
+
+		$sk =& $wgUser->getSkin();
+
+		$outText = '';
+		$templates = $this->mArticle->getUsedTemplates();
+		if ( count( $templates ) > 0 ) {
+			# Do a batch existence check
+			$batch = new LinkBatch;
+			foreach( $templates as $title ) {
+				$batch->addObj( $title );
+			}
+			$batch->execute();
+
+			# Construct the HTML
+			$outText = '<br />'. wfMsgExt( 'templatesused', array( 'parseinline' ) ) . '<ul>';
+			foreach ( $templates as $titleObj ) {
+				$outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
+			}
+			$outText .= '</ul>';
+		}
+		wfProfileOut( $fname );
+		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
+	 * submission method.
+	 *
+	 * 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() {
+		global $wgStylePath, $wgJsMimeType, $wgOut, $wgTitle;
+		$wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
+			htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
+			'"></script>' . "\n" );
+		$liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
+		return "return !livePreview(" .
+			"getElementById('wikiPreview')," .
+			"editform.wpTextbox1.value," .
+			'"' . $liveAction . '"' . ")";
+	}
+
+	function getLastDelete() {
+		$dbr =& wfGetDB( DB_SLAVE );
+		$fname = 'EditPage::getLastDelete';
+		$res = $dbr->select(
+			array( 'logging', 'user' ),
+			array( 'log_type',
+			       'log_action',
+			       'log_timestamp',
+			       'log_user',
+			       'log_namespace',
+			       'log_title',
+			       'log_comment',
+			       'log_params',
+			       'user_name', ),
+			array( 'log_namespace' => $this->mTitle->getNamespace(),
+			       'log_title' => $this->mTitle->getDBkey(),
+			       'log_type' => 'delete',
+			       'log_action' => 'delete',
+			       'user_id=log_user' ),
+			$fname,
+			array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
+
+		if($dbr->numRows($res) == 1) {
+			while ( $x = $dbr->fetchObject ( $res ) )
+				$data = $x;
+			$dbr->freeResult ( $res ) ;
+		} else {
+			$data = null;
+		}
+		return $data;
+	}
+
+	/**
+	 * @todo document
+	 */
+	function getPreviewText() {
+		global $wgOut, $wgUser, $wgTitle, $wgParser;
+
+		$fname = 'EditPage::getPreviewText';
+		wfProfileIn( $fname );
+
+		if ( $this->mTriedSave && !$this->mTokenOk ) {
+			$msg = 'session_fail_preview';
+		} else {
+			$msg = 'previewnote';
+		}
+		$previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
+			"<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
+		if ( $this->isConflict ) {
+			$previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
+		}
+
+		$parserOptions = ParserOptions::newFromUser( $wgUser );
+		$parserOptions->setEditSection( false );
+
+		global $wgRawHtml;
+		if( $wgRawHtml && !$this->mTokenOk ) {
+			// Could be an offsite preview attempt. This is very unsafe if
+			// HTML is enabled, as it could be an attack.
+			return $wgOut->parse( "<div class='previewnote'>" .
+				wfMsg( 'session_fail_preview_html' ) . "</div>" );
+		}
+
+		# don't parse user css/js, show message about preview
+		# XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
+		
+		if ( $this->isCssJsSubpage ) {
+			if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
+				$previewtext = wfMsg('usercsspreview');
+			} else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
+				$previewtext = wfMsg('userjspreview');
+			}
+			$parserOptions->setTidy(true);
+			$parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
+			$wgOut->addHTML( $parserOutput->mText );
+			wfProfileOut( $fname );
+			return $previewhead;
+		} else {
+			# if user want to see preview when he edit an article
+			if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
+				$this->textbox1 = $this->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 ;
+			$parserOptions->setTidy(true);
+			$parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
+					$wgTitle, $parserOptions );
+
+			$previewHTML = $parserOutput->getText();
+			$wgOut->addParserOutputNoText( $parserOutput );
+
+			wfProfileOut( $fname );
+			return $previewhead . $previewHTML;
+		}
+	}
+
+	/**
+	 * Call the stock "user is blocked" page
+	 */
+	function blockedPage() {
+		global $wgOut, $wgUser;
+		$wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
+		
+		# If the user made changes, preserve them when showing the markup
+		# (This happens when a user is blocked during edit, for instance)		
+		$first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
+		$source = $first ? $this->getContent() : $this->textbox1;
+		
+		# Spit out the source or the user's modified version
+		$rows = $wgUser->getOption( 'rows' );
+		$cols = $wgUser->getOption( 'cols' );
+		$attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
+		$wgOut->addHtml( '<hr />' );
+		$wgOut->addWikiText( wfMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() ) );
+		$wgOut->addHtml( wfElement( 'textarea', $attribs, $source ) );
+	}
+
+	/**
+	 * Produce the stock "please login to edit pages" page
+	 */
+	function userNotLoggedInPage() {
+		global $wgUser, $wgOut;
+		$skin = $wgUser->getSkin();
+		
+		$loginTitle = Title::makeTitle( NS_SPECIAL, 'Userlogin' );
+		$loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $this->mTitle->getPrefixedUrl() );
+	
+		$wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
+		$wgOut->setRobotPolicy( 'noindex,nofollow' );
+		$wgOut->setArticleRelated( false );
+		
+		$wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
+		$wgOut->returnToMain( false, $this->mTitle->getPrefixedUrl() );
+	}
+
+	/**
+	 * Creates a basic error page which informs the user that
+	 * they have to validate their email address before being
+	 * allowed to edit.
+	 */
+	function userNotConfirmedPage() {
+		global $wgOut;
+
+		$wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
+		$wgOut->setRobotPolicy( 'noindex,nofollow' );
+		$wgOut->setArticleRelated( false );
+		
+		$wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
+		$wgOut->returnToMain( false );
+	}
+
+	/**
+	 * Produce the stock "your edit contains spam" page
+	 *
+	 * @param $match Text which triggered one or more filters
+	 */
+	function spamPage( $match = false ) {
+		global $wgOut;
+
+		$wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
+		$wgOut->setRobotPolicy( 'noindex,nofollow' );
+		$wgOut->setArticleRelated( false );
+
+		$wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
+		if ( $match )
+			$wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
+			
+		$wgOut->returnToMain( false );
+	}
+
+	/**
+	 * @private
+	 * @todo document
+	 */
+	function mergeChangesInto( &$editText ){
+		$fname = 'EditPage::mergeChangesInto';
+		wfProfileIn( $fname );
+
+		$db =& wfGetDB( DB_MASTER );
+
+		// This is the revision the editor started from
+		$baseRevision = Revision::loadFromTimestamp(
+			$db, $this->mArticle->mTitle, $this->edittime );
+		if( is_null( $baseRevision ) ) {
+			wfProfileOut( $fname );
+			return false;
+		}
+		$baseText = $baseRevision->getText();
+
+		// The current state, we want to merge updates into it
+		$currentRevision =  Revision::loadFromTitle(
+			$db, $this->mArticle->mTitle );
+		if( is_null( $currentRevision ) ) {
+			wfProfileOut( $fname );
+			return false;
+		}
+		$currentText = $currentRevision->getText();
+
+		if( wfMerge( $baseText, $editText, $currentText, $result ) ){
+			$editText = $result;
+			wfProfileOut( $fname );
+			return true;
+		} else {
+			wfProfileOut( $fname );
+			return false;
+		}
+	}
+
+	/**
+	 * 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
+	 * @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) ) {
+				return false;
+			}
+		}
+		return true;
+	}
+
+	/**
+	 * Format an anchor fragment as it would appear for a given section name
+	 * @param string $text
+	 * @return string
+	 * @private
+	 */
+	function sectionAnchor( $text ) {
+		$headline = Sanitizer::decodeCharReferences( $text );
+		# strip out HTML
+		$headline = preg_replace( '/<.*?' . '>/', '', $headline );
+		$headline = trim( $headline );
+		$sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
+		$replacearray = array(
+			'%3A' => ':',
+			'%' => '.'
+		);
+		return str_replace(
+			array_keys( $replacearray ),
+			array_values( $replacearray ),
+			$sectionanchor );
+	}
+
+	/**
+	 * Shows a bulletin board style toolbar for common editing functions.
+	 * It can be disabled in the user preferences.
+	 * The necessary JavaScript code can be found in style/wikibits.js.
+	 */
+	function getEditToolbar() {
+		global $wgStylePath, $wgContLang, $wgJsMimeType;
+
+		/**
+		 * toolarray an array of arrays which each include the filename of
+		 * the button image (without path), the opening tag, the closing tag,
+		 * and optionally a sample text that is inserted between the two when no
+		 * selection is highlighted.
+		 * The tip text is shown when the user moves the mouse over the button.
+		 *
+		 * Already here are accesskeys (key), which are not used yet until someone
+		 * can figure out a way to make them work in IE. However, we should make
+		 * sure these keys are not defined on the edit page.
+		 */
+		$toolarray=array(
+			array(	'image'=>'button_bold.png',
+					'open'	=>	"\'\'\'",
+					'close'	=>	"\'\'\'",
+					'sample'=>	wfMsg('bold_sample'),
+					'tip'	=>	wfMsg('bold_tip'),
+					'key'	=>	'B'
+				),
+			array(	'image'=>'button_italic.png',
+					'open'	=>	"\'\'",
+					'close'	=>	"\'\'",
+					'sample'=>	wfMsg('italic_sample'),
+					'tip'	=>	wfMsg('italic_tip'),
+					'key'	=>	'I'
+				),
+			array(	'image'=>'button_link.png',
+					'open'	=>	'[[',
+					'close'	=>	']]',
+					'sample'=>	wfMsg('link_sample'),
+					'tip'	=>	wfMsg('link_tip'),
+					'key'	=>	'L'
+				),
+			array(	'image'=>'button_extlink.png',
+					'open'	=>	'[',
+					'close'	=>	']',
+					'sample'=>	wfMsg('extlink_sample'),
+					'tip'	=>	wfMsg('extlink_tip'),
+					'key'	=>	'X'
+				),
+			array(	'image'=>'button_headline.png',
+					'open'	=>	"\\n== ",
+					'close'	=>	" ==\\n",
+					'sample'=>	wfMsg('headline_sample'),
+					'tip'	=>	wfMsg('headline_tip'),
+					'key'	=>	'H'
+				),
+			array(	'image'=>'button_image.png',
+					'open'	=>	'[['.$wgContLang->getNsText(NS_IMAGE).":",
+					'close'	=>	']]',
+					'sample'=>	wfMsg('image_sample'),
+					'tip'	=>	wfMsg('image_tip'),
+					'key'	=>	'D'
+				),
+			array(	'image'	=>'button_media.png',
+					'open'	=>	'[['.$wgContLang->getNsText(NS_MEDIA).':',
+					'close'	=>	']]',
+					'sample'=>	wfMsg('media_sample'),
+					'tip'	=>	wfMsg('media_tip'),
+					'key'	=>	'M'
+				),
+			array(	'image'	=>'button_math.png',
+					'open'	=>	"<math>",
+					'close'	=>	"<\\/math>",
+					'sample'=>	wfMsg('math_sample'),
+					'tip'	=>	wfMsg('math_tip'),
+					'key'	=>	'C'
+				),
+			array(	'image'	=>'button_nowiki.png',
+					'open'	=>	"<nowiki>",
+					'close'	=>	"<\\/nowiki>",
+					'sample'=>	wfMsg('nowiki_sample'),
+					'tip'	=>	wfMsg('nowiki_tip'),
+					'key'	=>	'N'
+				),
+			array(	'image'	=>'button_sig.png',
+					'open'	=>	'--~~~~',
+					'close'	=>	'',
+					'sample'=>	'',
+					'tip'	=>	wfMsg('sig_tip'),
+					'key'	=>	'Y'
+				),
+			array(	'image'	=>'button_hr.png',
+					'open'	=>	"\\n----\\n",
+					'close'	=>	'',
+					'sample'=>	'',
+					'tip'	=>	wfMsg('hr_tip'),
+					'key'	=>	'R'
+				)
+		);
+		$toolbar = "<div id='toolbar'>\n";
+		$toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
+
+		foreach($toolarray as $tool) {
+
+			$image=$wgStylePath.'/common/images/'.$tool['image'];
+			$open=$tool['open'];
+			$close=$tool['close'];
+			$sample = wfEscapeJsString( $tool['sample'] );
+
+			// Note that we use the tip both for the ALT tag and the TITLE tag of the image.
+			// Older browsers show a "speedtip" type message only for ALT.
+			// Ideally these should be different, realistically they
+			// probably don't need to be.
+			$tip = wfEscapeJsString( $tool['tip'] );
+
+			#$key = $tool["key"];
+
+			$toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
+		}
+
+		$toolbar.="/*]]>*/\n</script>";
+		$toolbar.="\n</div>";
+		return $toolbar;
+	}
+
+	/**
+	 * Output preview text only. This can be sucked into the edit page
+	 * via JavaScript, and saves the server time rendering the skin as
+	 * well as theoretically being more robust on the client (doesn't
+	 * disturb the edit box's undo history, won't eat your text on
+	 * failure, etc).
+	 *
+	 * @todo This doesn't include category or interlanguage links.
+	 *       Would need to enhance it a bit, maybe wrap them in XML
+	 *       or something... that might also require more skin
+	 *       initialization, so check whether that's a problem.
+	 */
+	function livePreview() {
+		global $wgOut;
+		$wgOut->disable();
+		header( 'Content-type: text/xml' );
+		header( 'Cache-control: no-cache' );
+		# FIXME
+		echo $this->getPreviewText( );
+		/* To not shake screen up and down between preview and live-preview */
+		echo "<br style=\"clear:both;\" />\n";
+	}
+
+
+	/**
+	 * Get a diff between the current contents of the edit box and the
+	 * version of the page we're editing from.
+	 *
+	 * If this is a section edit, we'll replace the section as for final
+	 * save and then make a comparison.
+	 *
+	 * @return string HTML
+	 */
+	function getDiff() {
+		require_once( 'DifferenceEngine.php' );
+		$oldtext = $this->mArticle->fetchContent();
+		$newtext = $this->mArticle->replaceSection(
+			$this->section, $this->textbox1, $this->summary, $this->edittime );
+		$newtext = $this->mArticle->preSaveTransform( $newtext );
+		$oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
+		$newtitle = wfMsgExt( 'yourtext', array('parseinline') );
+		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>';
+	}
+
+	/**
+	 * Filter an input field through a Unicode de-armoring process if it
+	 * came from an old browser with known broken Unicode editing issues.
+	 *
+	 * @param WebRequest $request
+	 * @param string $field
+	 * @return string
+	 * @private
+	 */
+	function safeUnicodeInput( $request, $field ) {
+		$text = rtrim( $request->getText( $field ) );
+		return $request->getBool( 'safemode' )
+			? $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.
+	 *
+	 * @param string $text
+	 * @return string
+	 * @private
+	 */
+	function safeUnicodeOutput( $text ) {
+		global $wgContLang;
+		$codedText = $wgContLang->recodeForEdit( $text );
+		return $this->checkUnicodeCompliantBrowser()
+			? $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,
+	 * detected browsers will be served an armored version of the text,
+	 * with non-ASCII chars converted to numeric HTML character references.
+	 *
+	 * Preexisting such character references will have a 0 added to them
+	 * to ensure that round-trips do not alter the original data.
+	 *
+	 * @param string $invalue
+	 * @return string
+	 * @private
+	 */
+	function makesafe( $invalue ) {
+		// Armor existing references for reversability.
+		$invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
+
+		$bytesleft = 0;
+		$result = "";
+		$working = 0;
+		for( $i = 0; $i < strlen( $invalue ); $i++ ) {
+			$bytevalue = ord( $invalue{$i} );
+			if( $bytevalue <= 0x7F ) { //0xxx xxxx
+				$result .= chr( $bytevalue );
+				$bytesleft = 0;
+			} elseif( $bytevalue <= 0xBF ) { //10xx xxxx
+				$working = $working << 6;
+				$working += ($bytevalue & 0x3F);
+				$bytesleft--;
+				if( $bytesleft <= 0 ) {
+					$result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
+				}
+			} elseif( $bytevalue <= 0xDF ) { //110x xxxx
+				$working = $bytevalue & 0x1F;
+				$bytesleft = 1;
+			} elseif( $bytevalue <= 0xEF ) { //1110 xxxx
+				$working = $bytevalue & 0x0F;
+				$bytesleft = 2;
+			} else { //1111 0xxx
+				$working = $bytevalue & 0x07;
+				$bytesleft = 3;
+			}
+		}
+		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
+	 * as listed in $wgBrowserBlackList.
+	 *
+	 * @param string $invalue
+	 * @return string
+	 * @private
+	 */
+	function unmakesafe( $invalue ) {
+		$result = "";
+		for( $i = 0; $i < strlen( $invalue ); $i++ ) {
+			if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
+				$i += 3;
+				$hexstring = "";
+				do {
+					$hexstring .= $invalue{$i};
+					$i++;
+				} while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
+
+				// Do some sanity checks. These aren't needed for reversability,
+				// but should help keep the breakage down if the editor
+				// breaks one of the entities whilst editing.
+				if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
+					$codepoint = hexdec($hexstring);
+					$result .= codepointToUtf8( $codepoint );
+				} else {
+					$result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
+				}
+			} else {
+				$result .= substr( $invalue, $i, 1 );
+			}
+		}
+		// 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' ) );
+	}
+
+}
+
+?>