editpage.php

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			$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' ) );
	}

}

?>