<?php
if ( ! defined( 'MEDIAWIKI' ) )
	die( 1 );

/**
 *
 * @package MediaWiki
 * @subpackage Skins
 */

# See skin.txt

/**
 * The main skin class that provide methods and properties for all other skins.
 * This base class is also the "Standard" skin.
 * @package MediaWiki
 */
class Skin extends Linker {
	/**#@+
	 * @private
	 */
	var $lastdate, $lastline;
	var $rc_cache ; # Cache for Enhanced Recent Changes
	var $rcCacheIndex ; # Recent Changes Cache Counter for visibility toggle
	var $rcMoveIndex;
	/**#@-*/

	/** Constructor, call parent constructor */
	function Skin() { parent::Linker(); }

	/**
	 * Fetch the set of available skins.
	 * @return array of strings
	 * @static
	 */
	static function &getSkinNames() {
		global $wgValidSkinNames;
		static $skinsInitialised = false;
		if ( !$skinsInitialised ) {
			# Get a list of available skins
			# Build using the regular expression '^(.*).php$'
			# Array keys are all lower case, array value keep the case used by filename
			#
			wfProfileIn( __METHOD__ . '-init' );
			global $wgStyleDirectory;
			$skinDir = dir( $wgStyleDirectory );

			# while code from www.php.net
			while (false !== ($file = $skinDir->read())) {
				// Skip non-PHP files, hidden files, and '.dep' includes
				if(preg_match('/^([^.]*)\.php$/',$file, $matches)) {
					$aSkin = $matches[1];
					$wgValidSkinNames[strtolower($aSkin)] = $aSkin;
				}
			}
			$skinDir->close();
			$skinsInitialised = true;
			wfProfileOut( __METHOD__ . '-init' );
		}
		return $wgValidSkinNames;
	}

	/**
	 * Normalize a skin preference value to a form that can be loaded.
	 * If a skin can't be found, it will fall back to the configured
	 * default (or the old 'Classic' skin if that's broken).
	 * @param string $key
	 * @return string
	 * @static
	 */
	static function normalizeKey( $key ) {
		global $wgDefaultSkin;
		$skinNames = Skin::getSkinNames();

		if( $key == '' ) {
			// Don't return the default immediately;
			// in a misconfiguration we need to fall back.
			$key = $wgDefaultSkin;
		}

		if( isset( $skinNames[$key] ) ) {
			return $key;
		}

		// Older versions of the software used a numeric setting
		// in the user preferences.
		$fallback = array(
			0 => $wgDefaultSkin,
			1 => 'nostalgia',
			2 => 'cologneblue' );

		if( isset( $fallback[$key] ) ){
			$key = $fallback[$key];
		}

		if( isset( $skinNames[$key] ) ) {
			return $key;
		} else {
			// The old built-in skin
			return 'standard';
		}
	}

	/**
	 * Factory method for loading a skin of a given type
	 * @param string $key 'monobook', 'standard', etc
	 * @return Skin
	 * @static
	 */
	static function &newFromKey( $key ) {
		global $wgStyleDirectory;
		
		$key = Skin::normalizeKey( $key );

		$skinNames = Skin::getSkinNames();
		$skinName = $skinNames[$key];

		# Grab the skin class and initialise it.
		wfSuppressWarnings();
		// Preload base classes to work around APC/PHP5 bug
		include_once( "{$wgStyleDirectory}/{$skinName}.deps.php" );
		wfRestoreWarnings();
		require_once( "{$wgStyleDirectory}/{$skinName}.php" );

		# Check if we got if not failback to default skin
		$className = 'Skin'.$skinName;
		if( !class_exists( $className ) ) {
			# DO NOT die if the class isn't found. This breaks maintenance
			# scripts and can cause a user account to be unrecoverable
			# except by SQL manipulation if a previously valid skin name
			# is no longer valid.
			wfDebug( "Skin class does not exist: $className\n" );
			$className = 'SkinStandard';
			require_once( "{$wgStyleDirectory}/Standard.php" );
		}
		$skin = new $className;
		return $skin;
	}

	/** @return string path to the skin stylesheet */
	function getStylesheet() {
		return 'common/wikistandard.css?1';
	}

	/** @return string skin name */
	function getSkinName() {
		return 'standard';
	}

	function qbSetting() {
		global $wgOut, $wgUser;

		if ( $wgOut->isQuickbarSuppressed() ) { return 0; }
		$q = $wgUser->getOption( 'quickbar' );
		if ( '' == $q ) { $q = 0; }
		return $q;
	}

	function initPage( &$out ) {
		global $wgFavicon, $wgScriptPath, $wgSitename, $wgLanguageCode, $wgLanguageNames;

		$fname = 'Skin::initPage';
		wfProfileIn( $fname );

		if( false !== $wgFavicon ) {
			$out->addLink( array( 'rel' => 'shortcut icon', 'href' => $wgFavicon ) );
		}

		# OpenSearch description link
		$out->addLink( array( 
			'rel' => 'search', 
			'type' => 'application/opensearchdescription+xml',
			'href' => "$wgScriptPath/opensearch_desc.php",
			'title' => "$wgSitename ({$wgLanguageNames[$wgLanguageCode]})",
		));

		$this->addMetadataLinks($out);

		$this->mRevisionId = $out->mRevisionId;
		
		$this->preloadExistence();

		wfProfileOut( $fname );
	}

	/**
	 * Preload the existence of three commonly-requested pages in a single query
	 */
	function preloadExistence() {
		global $wgUser, $wgTitle;

		if ( $wgTitle->isTalkPage() ) {
			$otherTab = $wgTitle->getSubjectPage();
		} else {
			$otherTab = $wgTitle->getTalkPage();
		}
		$lb = new LinkBatch( array( 
			$wgUser->getUserPage(),
			$wgUser->getTalkPage(),
			$otherTab
		));
		$lb->execute();
	}
	
	function addMetadataLinks( &$out ) {
		global $wgTitle, $wgEnableDublinCoreRdf, $wgEnableCreativeCommonsRdf;
		global $wgRightsPage, $wgRightsUrl;

		if( $out->isArticleRelated() ) {
			# note: buggy CC software only reads first "meta" link
			if( $wgEnableCreativeCommonsRdf ) {
				$out->addMetadataLink( array(
					'title' => 'Creative Commons',
					'type' => 'application/rdf+xml',
					'href' => $wgTitle->getLocalURL( 'action=creativecommons') ) );
			}
			if( $wgEnableDublinCoreRdf ) {
				$out->addMetadataLink( array(
					'title' => 'Dublin Core',
					'type' => 'application/rdf+xml',
					'href' => $wgTitle->getLocalURL( 'action=dublincore' ) ) );
			}
		}
		$copyright = '';
		if( $wgRightsPage ) {
			$copy = Title::newFromText( $wgRightsPage );
			if( $copy ) {
				$copyright = $copy->getLocalURL();
			}
		}
		if( !$copyright && $wgRightsUrl ) {
			$copyright = $wgRightsUrl;
		}
		if( $copyright ) {
			$out->addLink( array(
				'rel' => 'copyright',
				'href' => $copyright ) );
		}
	}

	function outputPage( &$out ) {
		global $wgDebugComments;

		wfProfileIn( 'Skin::outputPage' );
		$this->initPage( $out );

		$out->out( $out->headElement() );

		$out->out( "\n<body" );
		$ops = $this->getBodyOptions();
		foreach ( $ops as $name => $val ) {
			$out->out( " $name='$val'" );
		}
		$out->out( ">\n" );
		if ( $wgDebugComments ) {
			$out->out( "<!-- Wiki debugging output:\n" .
			  $out->mDebugtext . "-->\n" );
		}

		$out->out( $this->beforeContent() );

		$out->out( $out->mBodytext . "\n" );

		$out->out( $this->afterContent() );

		$out->out( $this->bottomScripts() );

		$out->out( $out->reportTime() );

		$out->out( "\n</body></html>" );
	}

	static function makeGlobalVariablesScript( $data ) {
		$r = '<script type= "' . $data['jsmimetype'] . '">
			var skin = "' . Xml::escapeJsString( $data['skinname'] ) . '";
			var stylepath = "' . Xml::escapeJsString( $data['stylepath'] ) . '";

			var wgArticlePath = "' . Xml::escapeJsString( $data['articlepath'] ) . '";
			var wgScriptPath = "' . Xml::escapeJsString( $data['scriptpath'] ) . '";
			var wgServer = "' . Xml::escapeJsString( $data['serverurl'] ) . '";
                        
			var wgCanonicalNamespace = "' . Xml::escapeJsString( $data['nscanonical'] ) . '";
			var wgNamespaceNumber = ' . (int)$data['nsnumber'] . ';
			var wgPageName = "' . Xml::escapeJsString( $data['titleprefixeddbkey'] ) . '";
			var wgTitle = "' . Xml::escapeJsString( $data['titletext'] ) . '";
			var wgArticleId = ' . (int)$data['articleid'] . ';
			var wgIsArticle = ' . ( $data['isarticle'] ? 'true' : 'false' ) . ';
                        
			var wgUserName = ' . ( $data['username'] == NULL ? 'null' : ( '"' . Xml::escapeJsString( $data['username'] ) . '"' ) ) . ';
			var wgUserLanguage = "' . Xml::escapeJsString( $data['userlang'] ) . '";
			var wgContentLanguage = "' . Xml::escapeJsString( $data['lang'] ) . '";
		</script>
		';
		
		return $r;
	}

	function getHeadScripts() {
		global $wgStylePath, $wgUser, $wgAllowUserJs, $wgJsMimeType;
		global $wgArticlePath, $wgScriptPath, $wgServer, $wgContLang, $wgLang;
		global $wgTitle, $wgCanonicalNamespaceNames, $wgOut;

		$nsname = @$wgCanonicalNamespaceNames[ $wgTitle->getNamespace() ];
		if ( $nsname === NULL ) $nsname = $wgTitle->getNsText();

		$vars = array( 
			'jsmimetype' => $wgJsMimeType,
			'skinname' => $this->getSkinName(),
			'stylepath' => $wgStylePath,
			'articlepath' => $wgArticlePath,
			'scriptpath' => $wgScriptPath,
			'serverurl' => $wgServer,
			'nscanonical' => $nsname,
			'nsnumber' => $wgTitle->getNamespace(),
			'titleprefixeddbkey' => $wgTitle->getPrefixedDBKey(),
			'titletext' => $wgTitle->getText(),
			'articleid' => $wgTitle->getArticleId(),
			'isarticle' => $wgOut->isArticle(),
			'username' => $wgUser->isAnon() ? NULL : $wgUser->getName(),
			'userlang' => $wgLang->getCode(),
			'lang' => $wgContLang->getCode(),
		);

		$r = self::makeGlobalVariablesScript( $vars );

		$r .= "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/wikibits.js\"></script>\n";
		if( $wgAllowUserJs && $wgUser->isLoggedIn() ) {
			$userpage = $wgUser->getUserPage();
			$userjs = htmlspecialchars( self::makeUrl(
				$userpage->getPrefixedText().'/'.$this->getSkinName().'.js',
				'action=raw&ctype='.$wgJsMimeType));
			$r .= '<script type="'.$wgJsMimeType.'" src="'.$userjs."\"></script>\n";
		}
		return $r;
	}

	/**
	 * To make it harder for someone to slip a user a fake
	 * user-JavaScript or user-CSS preview, a random token
	 * is associated with the login session. If it's not
	 * passed back with the preview request, we won't render
	 * the code.
	 *
	 * @param string $action
	 * @return bool
	 * @private
	 */
	function userCanPreview( $action ) {
		global $wgTitle, $wgRequest, $wgUser;

		if( $action != 'submit' )
			return false;
		if( !$wgRequest->wasPosted() )
			return false;
		if( !$wgTitle->userCanEditCssJsSubpage() )
			return false;
		return $wgUser->matchEditToken(
			$wgRequest->getVal( 'wpEditToken' ) );
	}

	# get the user/site-specific stylesheet, SkinTemplate loads via RawPage.php (settings are cached that way)
	function getUserStylesheet() {
		global $wgStylePath, $wgRequest, $wgContLang, $wgSquidMaxage;
		$sheet = $this->getStylesheet();
		$action = $wgRequest->getText('action');
		$s = "@import \"$wgStylePath/$sheet\";\n";
		if($wgContLang->isRTL()) $s .= "@import \"$wgStylePath/common/common_rtl.css\";\n";

		$query = "usemsgcache=yes&action=raw&ctype=text/css&smaxage=$wgSquidMaxage";
		$s .= '@import "' . self::makeNSUrl( 'Common.css', $query, NS_MEDIAWIKI ) . "\";\n" .
			'@import "' . self::makeNSUrl( ucfirst( $this->getSkinName() . '.css' ), $query, NS_MEDIAWIKI ) . "\";\n";

		$s .= $this->doGetUserStyles();
		return $s."\n";
	}

	/**
	 * placeholder, returns generated js in monobook
	 */
	function getUserJs() { return; }

	/**
	 * Return html code that include User stylesheets
	 */
	function getUserStyles() {
		$s = "<style type='text/css'>\n";
		$s .= "/*/*/ /*<![CDATA[*/\n"; # <-- Hide the styles from Netscape 4 without hiding them from IE/Mac
		$s .= $this->getUserStylesheet();
		$s .= "/*]]>*/ /* */\n";
		$s .= "</style>\n";
		return $s;
	}

	/**
	 * Some styles that are set by user through the user settings interface.
	 */
	function doGetUserStyles() {
		global $wgUser, $wgUser, $wgRequest, $wgTitle, $wgAllowUserCss;

		$s = '';

		if( $wgAllowUserCss && $wgUser->isLoggedIn() ) { # logged in
			if($wgTitle->isCssSubpage() && $this->userCanPreview( $wgRequest->getText( 'action' ) ) ) {
				$s .= $wgRequest->getText('wpTextbox1');
			} else {
				$userpage = $wgUser->getUserPage();
				$s.= '@import "'.self::makeUrl(
					$userpage->getPrefixedText().'/'.$this->getSkinName().'.css',
					'action=raw&ctype=text/css').'";'."\n";
			}
		}

		return $s . $this->reallyDoGetUserStyles();
	}

	function reallyDoGetUserStyles() {
		global $wgUser;
		$s = '';
		if (($undopt = $wgUser->getOption("underline")) != 2) {
			$underline = $undopt ? 'underline' : 'none';
			$s .= "a { text-decoration: $underline; }\n";
		}
		if( $wgUser->getOption( 'highlightbroken' ) ) {
			$s .= "a.new, #quickbar a.new { color: #CC2200; }\n";
		} else {
			$s .= <<<END
a.new, #quickbar a.new,
a.stub, #quickbar a.stub {
	color: inherit;
	text-decoration: inherit;
}
a.new:after, #quickbar a.new:after {
	content: "?";
	color: #CC2200;
	text-decoration: $underline;
}
a.stub:after, #quickbar a.stub:after {
	content: "!";
	color: #772233;
	text-decoration: $underline;
}
END;
		}
		if( $wgUser->getOption( 'justify' ) ) {
			$s .= "#article, #bodyContent { text-align: justify; }\n";
		}
		if( !$wgUser->getOption( 'showtoc' ) ) {
			$s .= "#toc { display: none; }\n";
		}
		if( !$wgUser->getOption( 'editsection' ) ) {
			$s .= ".editsection { display: none; }\n";
		}
		return $s;
	}

	function getBodyOptions() {
		global $wgUser, $wgTitle, $wgOut, $wgRequest, $wgContLang;

		extract( $wgRequest->getValues( 'oldid', 'redirect', 'diff' ) );

		if ( 0 != $wgTitle->getNamespace() ) {
			$a = array( 'bgcolor' => '#ffffec' );
		}
		else $a = array( 'bgcolor' => '#FFFFFF' );
		if($wgOut->isArticle() && $wgUser->getOption('editondblclick') &&
		  $wgTitle->userCanEdit() ) {
			$t = wfMsg( 'editthispage' );
			$s = $wgTitle->getFullURL( $this->editUrlOptions() );
			$s = 'document.location = "' .wfEscapeJSString( $s ) .'";';
			$a += array ('ondblclick' => $s);

		}
		$a['onload'] = $wgOut->getOnloadHandler();
		if( $wgUser->getOption( 'editsectiononrightclick' ) ) {
			if( $a['onload'] != '' ) {
				$a['onload'] .= ';';
			}
			$a['onload'] .= 'setupRightClickEdit()';
		}
		$a['class'] = 'ns-'.$wgTitle->getNamespace().' '.($wgContLang->isRTL() ? "rtl" : "ltr");
		return $a;
	}

	/**
	 * URL to the logo
	 */
	function getLogo() {
		global $wgLogo;
		return $wgLogo;
	}

	/**
	 * This will be called immediately after the <body> tag.  Split into
	 * two functions to make it easier to subclass.
	 */
	function beforeContent() {
		return $this->doBeforeContent();
	}

	function doBeforeContent() {
		global $wgContLang;
		$fname = 'Skin::doBeforeContent';
		wfProfileIn( $fname );

		$s = '';
		$qb = $this->qbSetting();

		if( $langlinks = $this->otherLanguages() ) {
			$rows = 2;
			$borderhack = '';
		} else {
			$rows = 1;
			$langlinks = false;
			$borderhack = 'class="top"';
		}

		$s .= "\n<div id='content'>\n<div id='topbar'>\n" .
		  "<table border='0' cellspacing='0' width='98%'>\n<tr>\n";

		$shove = ($qb != 0);
		$left = ($qb == 1 || $qb == 3);
		if($wgContLang->isRTL()) $left = !$left;

		if ( !$shove ) {
			$s .= "<td class='top' align='left' valign='top' rowspan='{$rows}'>\n" .
			  $this->logoText() . '</td>';
		} elseif( $left ) {
			$s .= $this->getQuickbarCompensator( $rows );
		}
		$l = $wgContLang->isRTL() ? 'right' : 'left';
		$s .= "<td {$borderhack} align='$l' valign='top'>\n";

		$s .= $this->topLinks() ;
		$s .= "<p class='subtitle'>" . $this->pageTitleLinks() . "</p>\n";

		$r = $wgContLang->isRTL() ? "left" : "right";
		$s .= "</td>\n<td {$borderhack} valign='top' align='$r' nowrap='nowrap'>";
		$s .= $this->nameAndLogin();
		$s .= "\n<br />" . $this->searchForm() . "</td>";

		if ( $langlinks ) {
			$s .= "</tr>\n<tr>\n<td class='top' colspan=\"2\">$langlinks</td>\n";
		}

		if ( $shove && !$left ) { # Right
			$s .= $this->getQuickbarCompensator( $rows );
		}
		$s .= "</tr>\n</table>\n</div>\n";
		$s .= "\n<div id='article'>\n";

		$notice = wfGetSiteNotice();
		if( $notice ) {
			$s .= "\n<div id='siteNotice'>$notice</div>\n";
		}
		$s .= $this->pageTitle();
		$s .= $this->pageSubtitle() ;
		$s .= $this->getCategories();
		wfProfileOut( $fname );
		return $s;
	}


	function getCategoryLinks () {
		global $wgOut, $wgTitle, $wgUseCategoryBrowser;
		global $wgContLang;

		if( count( $wgOut->mCategoryLinks ) == 0 ) return '';

		# Separator
		$sep = wfMsgHtml( 'catseparator' );

		// Use Unicode bidi embedding override characters,
		// to make sure links don't smash each other up in ugly ways.
		$dir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
		$embed = "<span dir='$dir'>";
		$pop = '</span>';
		$t = $embed . implode ( "{$pop} {$sep} {$embed}" , $wgOut->mCategoryLinks ) . $pop;

		$msg = wfMsgExt('categories', array('parsemag', 'escape'), count( $wgOut->mCategoryLinks ));
		$s = $this->makeKnownLinkObj( Title::makeTitle( NS_SPECIAL, 'Categories' ),
			$msg, 'article=' . urlencode( $wgTitle->getPrefixedDBkey() ) )
			. ': ' . $t;

		# optional 'dmoz-like' category browser. Will be shown under the list
		# of categories an article belong to
		if($wgUseCategoryBrowser) {
			$s .= '<br /><hr />';

			# get a big array of the parents tree
			$parenttree = $wgTitle->getParentCategoryTree();
			# Skin object passed by reference cause it can not be
			# accessed under the method subfunction drawCategoryBrowser
			$tempout = explode("\n", Skin::drawCategoryBrowser($parenttree, $this) );
			# Clean out bogus first entry and sort them
			unset($tempout[0]);
			asort($tempout);
			# Output one per line
			$s .= implode("<br />\n", $tempout);
		}

		return $s;
	}

	/** Render the array as a serie of links.
	 * @param $tree Array: categories tree returned by Title::getParentCategoryTree
	 * @param &skin Object: skin passed by reference
	 * @return String separated by &gt;, terminate with "\n"
	 */
	function drawCategoryBrowser($tree, &$skin) {
		$return = '';
		foreach ($tree as $element => $parent) {
			if (empty($parent)) {
				# element start a new list
				$return .= "\n";
			} else {
				# grab the others elements
				$return .= Skin::drawCategoryBrowser($parent, $skin) . ' &gt; ';
			}
			# add our current element to the list
			$eltitle = Title::NewFromText($element);
			$return .=  $skin->makeLinkObj( $eltitle, $eltitle->getText() ) ;
		}
		return $return;
	}

	function getCategories() {
		$catlinks=$this->getCategoryLinks();
		if(!empty($catlinks)) {
			return "<p class='catlinks'>{$catlinks}</p>";
		}
	}

	function getQuickbarCompensator( $rows = 1 ) {
		return "<td width='152' rowspan='{$rows}'>&nbsp;</td>";
	}

	/**
	 * This gets called shortly before the \</body\> tag.
	 * @return String HTML to be put before \</body\> 
	 */
	function afterContent() {
		$printfooter = "<div class=\"printfooter\">\n" . $this->printFooter() . "</div>\n";
		return $printfooter . $this->doAfterContent();
	}

	/**
	 * This gets called shortly before the \</body\> tag.
	 * @return String HTML-wrapped JS code to be put before \</body\> 
	 */
	function bottomScripts() {
		global $wgJsMimeType;
		return "\n\t\t<script type=\"$wgJsMimeType\">if (window.runOnloadHook) runOnloadHook();</script>\n";
	}

	/** @return string Retrievied from HTML text */
	function printSource() {
		global $wgTitle;
		$url = htmlspecialchars( $wgTitle->getFullURL() );
		return wfMsg( 'retrievedfrom', '<a href="'.$url.'">'.$url.'</a>' );
	}

	function printFooter() {
		return "<p>" .  $this->printSource() .
			"</p>\n\n<p>" . $this->pageStats() . "</p>\n";
	}

	/** overloaded by derived classes */
	function doAfterContent() { }

	function pageTitleLinks() {
		global $wgOut, $wgTitle, $wgUser, $wgRequest;

		extract( $wgRequest->getValues( 'oldid', 'diff' ) );
		$action = $wgRequest->getText( 'action' );

		$s = $this->printableLink();
		$disclaimer = $this->disclaimerLink(); # may be empty
		if( $disclaimer ) {
			$s .= ' | ' . $disclaimer;
		}
		$privacy = $this->privacyLink(); # may be empty too
		if( $privacy ) {
			$s .= ' | ' . $privacy;
		}

		if ( $wgOut->isArticleRelated() ) {
			if ( $wgTitle->getNamespace() == NS_IMAGE ) {
				$name = $wgTitle->getDBkey();
				$image = new Image( $wgTitle );
				if( $image->exists() ) {
					$link = htmlspecialchars( $image->getURL() );
					$style = $this->getInternalLinkAttributes( $link, $name );
					$s .= " | <a href=\"{$link}\"{$style}>{$name}</a>";
				}
			}
		}
		if ( 'history' == $action || isset( $diff ) || isset( $oldid ) ) {
			$s .= ' | ' . $this->makeKnownLinkObj( $wgTitle,
					wfMsg( 'currentrev' ) );
		}

		if ( $wgUser->getNewtalk() ) {
			# do not show "You have new messages" text when we are viewing our
			# own talk page
			if( !$wgTitle->equals( $wgUser->getTalkPage() ) ) {
				$tl = $this->makeKnownLinkObj( $wgUser->getTalkPage(), wfMsgHtml( 'newmessageslink' ), 'redirect=no' );
				$dl = $this->makeKnownLinkObj( $wgUser->getTalkPage(), wfMsgHtml( 'newmessagesdifflink' ), 'diff=cur' );
				$s.= ' | <strong>'. wfMsg( 'youhavenewmessages', $tl, $dl ) . '</strong>';
				# disable caching
				$wgOut->setSquidMaxage(0);
				$wgOut->enableClientCache(false);
			}
		}

		$undelete = $this->getUndeleteLink();
		if( !empty( $undelete ) ) {
			$s .= ' | '.$undelete;
		}
		return $s;
	}

	function getUndeleteLink() {
		global $wgUser, $wgTitle, $wgContLang, $action;
		if(	$wgUser->isAllowed( 'deletedhistory' ) &&
			(($wgTitle->getArticleId() == 0) || ($action == "history")) &&
			($n = $wgTitle->isDeleted() ) )
		{
			if ( $wgUser->isAllowed( 'delete' ) ) {
				$msg = 'thisisdeleted';
			} else {
				$msg = 'viewdeleted';
			}
			return wfMsg( $msg,
				$this->makeKnownLink(
					$wgContLang->SpecialPage( 'Undelete/' . $wgTitle->getPrefixedDBkey() ),
					wfMsgExt( 'restorelink', array( 'parsemag', 'escape' ), $n ) ) );
		}
		return '';
	}

	function printableLink() {
		global $wgOut, $wgFeedClasses, $wgRequest;

		$baseurl = $_SERVER['REQUEST_URI'];
		if( strpos( '?', $baseurl ) == false ) {
			$baseurl .= '?';
		} else {
			$baseurl .= '&';
		}
		$baseurl = htmlspecialchars( $baseurl );
		$printurl = $wgRequest->escapeAppendQuery( 'printable=yes' );

		$s = "<a href=\"$printurl\">" . wfMsg( 'printableversion' ) . '</a>';
		if( $wgOut->isSyndicated() ) {
			foreach( $wgFeedClasses as $format => $class ) {
				$feedurl = $wgRequest->escapeAppendQuery( "feed=$format" );
				$s .= " | <a href=\"$feedurl\">{$format}</a>";
			}
		}
		return $s;
	}

	function pageTitle() {
		global $wgOut;
		$s = '<h1 class="pagetitle">' . htmlspecialchars( $wgOut->getPageTitle() ) . '</h1>';
		return $s;
	}

	function pageSubtitle() {
		global $wgOut;

		$sub = $wgOut->getSubtitle();
		if ( '' == $sub ) {
			global $wgExtraSubtitle;
			$sub = wfMsg( 'tagline' ) . $wgExtraSubtitle;
		}
		$subpages = $this->subPageSubtitle();
		$sub .= !empty($subpages)?"</p><p class='subpages'>$subpages":'';
		$s = "<p class='subtitle'>{$sub}</p>\n";
		return $s;
	}

	function subPageSubtitle() {
		global $wgOut,$wgTitle,$wgNamespacesWithSubpages;
		$subpages = '';
		if($wgOut->isArticle() && !empty($wgNamespacesWithSubpages[$wgTitle->getNamespace()])) {
			$ptext=$wgTitle->getPrefixedText();
			if(preg_match('/\//',$ptext)) {
				$links = explode('/',$ptext);
				$c = 0;
				$growinglink = '';
				foreach($links as $link) {
					$c++;
					if ($c<count($links)) {
						$growinglink .= $link;
						$getlink = $this->makeLink( $growinglink, htmlspecialchars( $link ) );
						if(preg_match('/class="new"/i',$getlink)) { break; } # this is a hack, but it saves time
						if ($c>1) {
							$subpages .= ' | ';
						} else  {
							$subpages .= '&lt; ';
						}
						$subpages .= $getlink;
						$growinglink .= '/';
					}
				}
			}
		}
		return $subpages;
	}

	function nameAndLogin() {
		global $wgUser, $wgTitle, $wgLang, $wgContLang, $wgShowIPinHeader;

		$li = $wgContLang->specialPage( 'Userlogin' );
		$lo = $wgContLang->specialPage( 'Userlogout' );

		$s = '';
		if ( $wgUser->isAnon() ) {
			if( $wgShowIPinHeader && isset( $_COOKIE[ini_get('session.name')] ) ) {
				$n = wfGetIP();

				$tl = $this->makeKnownLinkObj( $wgUser->getTalkPage(),
				  $wgLang->getNsText( NS_TALK ) );

				$s .= $n . ' ('.$tl.')';
			} else {
				$s .= wfMsg('notloggedin');
			}

			$rt = $wgTitle->getPrefixedURL();
			if ( 0 == strcasecmp( urlencode( $lo ), $rt ) ) {
				$q = '';
			} else { $q = "returnto={$rt}"; }

			$s .= "\n<br />" . $this->makeKnownLinkObj(
				Title::makeTitle( NS_SPECIAL, 'Userlogin' ),
				wfMsg( 'login' ), $q );
		} else {
			$n = $wgUser->getName();
			$rt = $wgTitle->getPrefixedURL();
			$tl = $this->makeKnownLinkObj( $wgUser->getTalkPage(),
			  $wgLang->getNsText( NS_TALK ) );

			$tl = " ({$tl})";

			$s .= $this->makeKnownLinkObj( $wgUser->getUserPage(),
			  $n ) . "{$tl}<br />" .
			  $this->makeKnownLinkObj( Title::makeTitle( NS_SPECIAL, 'Userlogout' ), wfMsg( 'logout' ),
			  "returnto={$rt}" ) . ' | ' .
			  $this->specialLink( 'preferences' );
		}
		$s .= ' | ' . $this->makeKnownLink( wfMsgForContent( 'helppage' ),
		  wfMsg( 'help' ) );

		return $s;
	}

	function getSearchLink() {
		$searchPage =& Title::makeTitle( NS_SPECIAL, 'Search' );
		return $searchPage->getLocalURL();
	}

	function escapeSearchLink() {
		return htmlspecialchars( $this->getSearchLink() );
	}

	function searchForm() {
		global $wgRequest;
		$search = $wgRequest->getText( 'search' );

		$s = '<form name="search" class="inline" method="post" action="'
		  . $this->escapeSearchLink() . "\">\n"
		  . '<input type="text" name="search" size="19" value="'
		  . htmlspecialchars(substr($search,0,256)) . "\" />\n"
		  . '<input type="submit" name="go" value="' . wfMsg ('searcharticle') . '" />&nbsp;'
		  . '<input type="submit" name="fulltext" value="' . wfMsg ('searchbutton') . "\" />\n</form>";

		return $s;
	}

	function topLinks() {
		global $wgOut;
		$sep = " |\n";

		$s = $this->mainPageLink() . $sep
		  . $this->specialLink( 'recentchanges' );

		if ( $wgOut->isArticleRelated() ) {
			$s .=  $sep . $this->editThisPage()
			  . $sep . $this->historyLink();
		}
		# Many people don't like this dropdown box
		#$s .= $sep . $this->specialPagesList();

		/* show links to different language variants */
		global $wgDisableLangConversion, $wgContLang, $wgTitle;
		$variants = $wgContLang->getVariants();
		if( !$wgDisableLangConversion && sizeof( $variants ) > 1 ) {
			foreach( $variants as $code ) {
				$varname = $wgContLang->getVariantname( $code );
				if( $varname == 'disable' )
					continue;
				$s .= ' | <a href="' . $wgTitle->getLocalUrl( 'variant=' . $code ) . '">' . $varname . '</a>';
			}
		}

		return $s;
	}

	function bottomLinks() {
		global $wgOut, $wgUser, $wgTitle, $wgUseTrackbacks;
		$sep = " |\n";

		$s = '';
		if ( $wgOut->isArticleRelated() ) {
			$s .= '<strong>' . $this->editThisPage() . '</strong>';
			if ( $wgUser->isLoggedIn() ) {
				$s .= $sep . $this->watchThisPage();
			}
			$s .= $sep . $this->talkLink()
			  . $sep . $this->historyLink()
			  . $sep . $this->whatLinksHere()
			  . $sep . $this->watchPageLinksLink();

			if ($wgUseTrackbacks)
				$s .= $sep . $this->trackbackLink();

			if ( $wgTitle->getNamespace() == NS_USER
			    || $wgTitle->getNamespace() == NS_USER_TALK )

			{
				$id=User::idFromName($wgTitle->getText());
				$ip=User::isIP($wgTitle->getText());

				if($id || $ip) { # both anons and non-anons have contri list
					$s .= $sep . $this->userContribsLink();
				}
				if( $this->showEmailUser( $id ) ) {
					$s .= $sep . $this->emailUserLink();
				}
			}
			if ( $wgTitle->getArticleId() ) {
				$s .= "\n<br />";
				if($wgUser->isAllowed('delete')) { $s .= $this->deleteThisPage(); }
				if($wgUser->isAllowed('protect')) { $s .= $sep . $this->protectThisPage(); }
				if($wgUser->isAllowed('move')) { $s .= $sep . $this->moveThisPage(); }
			}
			$s .= "<br />\n" . $this->otherLanguages();
		}
		return $s;
	}

	function pageStats() {
		global $wgOut, $wgLang, $wgArticle, $wgRequest, $wgUser;
		global $wgDisableCounters, $wgMaxCredits, $wgShowCreditsIfMax, $wgTitle, $wgPageShowWatchingUsers;

		extract( $wgRequest->getValues( 'oldid', 'diff' ) );
		if ( ! $wgOut->isArticle() ) { return ''; }
		if ( isset( $oldid ) || isset( $diff ) ) { return ''; }
		if ( 0 == $wgArticle->getID() ) { return ''; }

		$s = '';
		if ( !$wgDisableCounters ) {
			$count = $wgLang->formatNum( $wgArticle->getCount() );
			if ( $count ) {
				$s = wfMsgExt( 'viewcount', array( 'parseinline' ), $count );
			}
		}

	        if (isset($wgMaxCredits) && $wgMaxCredits != 0) {
		    require_once('Credits.php');
		    $s .= ' ' . getCredits($wgArticle, $wgMaxCredits, $wgShowCreditsIfMax);
		} else {
		    $s .= $this->lastModified();
		}

		if ($wgPageShowWatchingUsers && $wgUser->getOption( 'shownumberswatching' )) {
			$dbr =& wfGetDB( DB_SLAVE );
			extract( $dbr->tableNames( 'watchlist' ) );
			$sql = "SELECT COUNT(*) AS n FROM $watchlist
				WHERE wl_title='" . $dbr->strencode($wgTitle->getDBKey()) .
				"' AND  wl_namespace=" . $wgTitle->getNamespace() ;
			$res = $dbr->query( $sql, 'Skin::pageStats');
			$x = $dbr->fetchObject( $res );
			$s .= ' ' . wfMsg('number_of_watching_users_pageview', $x->n );
		}

		return $s . ' ' .  $this->getCopyright();
	}

	function getCopyright( $type = 'detect' ) {
		global $wgRightsPage, $wgRightsUrl, $wgRightsText, $wgRequest;

		if ( $type == 'detect' ) {
			$oldid = $wgRequest->getVal( 'oldid' );
			$diff = $wgRequest->getVal( 'diff' );

			if ( !is_null( $oldid ) && is_null( $diff ) && wfMsgForContent( 'history_copyright' ) !== '-' ) {
				$type = 'history';
			} else {
				$type = 'normal';
			}
		}

		if ( $type == 'history' ) {
			$msg = 'history_copyright';
		} else {
			$msg = 'copyright';
		}

		$out = '';
		if( $wgRightsPage ) {
			$link = $this->makeKnownLink( $wgRightsPage, $wgRightsText );
		} elseif( $wgRightsUrl ) {
			$link = $this->makeExternalLink( $wgRightsUrl, $wgRightsText );
		} else {
			# Give up now
			return $out;
		}
		$out .= wfMsgForContent( $msg, $link );
		return $out;
	}

	function getCopyrightIcon() {
		global $wgRightsUrl, $wgRightsText, $wgRightsIcon, $wgCopyrightIcon;
		$out = '';
		if ( isset( $wgCopyrightIcon ) && $wgCopyrightIcon ) {
			$out = $wgCopyrightIcon;
		} else if ( $wgRightsIcon ) {
			$icon = htmlspecialchars( $wgRightsIcon );
			if ( $wgRightsUrl ) {
				$url = htmlspecialchars( $wgRightsUrl );
				$out .= '<a href="'.$url.'">';
			}
			$text = htmlspecialchars( $wgRightsText );
			$out .= "<img src=\"$icon\" alt='$text' />";
			if ( $wgRightsUrl ) {
				$out .= '</a>';
			}
		}
		return $out;
	}

	function getPoweredBy() {
		global $wgStylePath;
		$url = htmlspecialchars( "$wgStylePath/common/images/poweredby_mediawiki_88x31.png" );
		$img = '<a href="http://www.mediawiki.org/"><img src="'.$url.'" alt="MediaWiki" /></a>';
		return $img;
	}

	function lastModified() {
		global $wgLang, $wgArticle, $wgLoadBalancer;

		$timestamp = $wgArticle->getTimestamp();
		if ( $timestamp ) {
			$d = $wgLang->date( $timestamp, true );
			$t = $wgLang->time( $timestamp, true );
			$s = ' ' . wfMsg( 'lastmodifiedat', $d, $t );
		} else {
			$s = '';
		}
		if ( $wgLoadBalancer->getLaggedSlaveMode() ) {
			$s .= ' <strong>' . wfMsg( 'laggedslavemode' ) . '</strong>';
		}
		return $s;
	}

	function logoText( $align = '' ) {
		if ( '' != $align ) { $a = " align='{$align}'"; }
		else { $a = ''; }

		$mp = wfMsg( 'mainpage' );
		$titleObj = Title::newFromText( $mp );
		if ( is_object( $titleObj ) ) {
			$url = $titleObj->escapeLocalURL();
		} else {
			$url = '';
		}

		$logourl = $this->getLogo();
		$s = "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
		return $s;
	}

	/**
	 * show a drop-down box of special pages
	 */
	function specialPagesList() {
		global $wgUser, $wgContLang, $wgServer, $wgRedirectScript;
		$a = array();
		$pages = array_merge( SpecialPage::getRegularPages(), SpecialPage::getRestrictedPages() );
		foreach ( $pages as $name => $page ) {
			$pages[$name] = $page->getDescription();
		}

		$go = wfMsg( 'go' );
		$sp = wfMsg( 'specialpages' );
		$spp = $wgContLang->specialPage( 'Specialpages' );

		$s = '<form id="specialpages" method="get" class="inline" ' .
		  'action="' . htmlspecialchars( "{$wgServer}{$wgRedirectScript}" ) . "\">\n";
		$s .= "<select name=\"wpDropdown\">\n";
		$s .= "<option value=\"{$spp}\">{$sp}</option>\n";


		foreach ( $pages as $name => $desc ) {
			$p = $wgContLang->specialPage( $name );
			$s .= "<option value=\"{$p}\">{$desc}</option>\n";
		}
		$s .= "</select>\n";
		$s .= "<input type='submit' value=\"{$go}\" name='redirect' />\n";
		$s .= "</form>\n";
		return $s;
	}

	function mainPageLink() {
		$mp = wfMsgForContent( 'mainpage' );
		$mptxt = wfMsg( 'mainpage');
		$s = $this->makeKnownLink( $mp, $mptxt );
		return $s;
	}

	function copyrightLink() {
		$s = $this->makeKnownLink( wfMsgForContent( 'copyrightpage' ),
		  wfMsg( 'copyrightpagename' ) );
		return $s;
	}

	function privacyLink() {
		$privacy = wfMsg( 'privacy' );
		if ($privacy == '-') {
			return '';
		} else {
			return $this->makeKnownLink( wfMsgForContent( 'privacypage' ), $privacy);
		}
	}

	function aboutLink() {
		$s = $this->makeKnownLink( wfMsgForContent( 'aboutpage' ),
		  wfMsg( 'aboutsite' ) );
		return $s;
	}

	function disclaimerLink() {
		$disclaimers = wfMsg( 'disclaimers' );
		if ($disclaimers == '-') {
			return '';
		} else {
			return $this->makeKnownLink( wfMsgForContent( 'disclaimerpage' ),
			                             $disclaimers );
		}
	}

	function editThisPage() {
		global $wgOut, $wgTitle;

		if ( ! $wgOut->isArticleRelated() ) {
			$s = wfMsg( 'protectedpage' );
		} else {
			if ( $wgTitle->userCanEdit() ) {
				$t = wfMsg( 'editthispage' );
			} else {
				$t = wfMsg( 'viewsource' );
			}

			$s = $this->makeKnownLinkObj( $wgTitle, $t, $this->editUrlOptions() );
		}
		return $s;
	}

	/**
	 * Return URL options for the 'edit page' link.
	 * This may include an 'oldid' specifier, if the current page view is such.
	 *
	 * @return string
	 * @private
	 */
	function editUrlOptions() {
		global $wgArticle;

		if( $this->mRevisionId && ! $wgArticle->isCurrent() ) {
			return "action=edit&oldid=" . intval( $this->mRevisionId );
		} else {
			return "action=edit";
		}
	}

	function deleteThisPage() {
		global $wgUser, $wgTitle, $wgRequest;

		$diff = $wgRequest->getVal( 'diff' );
		if ( $wgTitle->getArticleId() && ( ! $diff ) && $wgUser->isAllowed('delete') ) {
			$t = wfMsg( 'deletethispage' );

			$s = $this->makeKnownLinkObj( $wgTitle, $t, 'action=delete' );
		} else {
			$s = '';
		}
		return $s;
	}

	function protectThisPage() {
		global $wgUser, $wgTitle, $wgRequest;

		$diff = $wgRequest->getVal( 'diff' );
		if ( $wgTitle->getArticleId() && ( ! $diff ) && $wgUser->isAllowed('protect') ) {
			if ( $wgTitle->isProtected() ) {
				$t = wfMsg( 'unprotectthispage' );
				$q = 'action=unprotect';
			} else {
				$t = wfMsg( 'protectthispage' );
				$q = 'action=protect';
			}
			$s = $this->makeKnownLinkObj( $wgTitle, $t, $q );
		} else {
			$s = '';
		}
		return $s;
	}

	function watchThisPage() {
		global $wgOut, $wgTitle;

		if ( $wgOut->isArticleRelated() ) {
			if ( $wgTitle->userIsWatching() ) {
				$t = wfMsg( 'unwatchthispage' );
				$q = 'action=unwatch';
			} else {
				$t = wfMsg( 'watchthispage' );
				$q = 'action=watch';
			}
			$s = $this->makeKnownLinkObj( $wgTitle, $t, $q );
		} else {
			$s = wfMsg( 'notanarticle' );
		}
		return $s;
	}

	function moveThisPage() {
		global $wgTitle;

		if ( $wgTitle->userCanMove() ) {
			return $this->makeKnownLinkObj( Title::makeTitle( NS_SPECIAL, 'Movepage' ),
			  wfMsg( 'movethispage' ), 'target=' . $wgTitle->getPrefixedURL() );
		} else {
			// no message if page is protected - would be redundant
			return '';
		}
	}

	function historyLink() {
		global $wgTitle;

		return $this->makeKnownLinkObj( $wgTitle,
		  wfMsg( 'history' ), 'action=history' );
	}

	function whatLinksHere() {
		global $wgTitle;

		return $this->makeKnownLinkObj( Title::makeTitle( NS_SPECIAL, 'Whatlinkshere' ),
		  wfMsg( 'whatlinkshere' ), 'target=' . $wgTitle->getPrefixedURL() );
	}

	function userContribsLink() {
		global $wgTitle;

		return $this->makeKnownLinkObj( Title::makeTitle( NS_SPECIAL, 'Contributions' ),
		  wfMsg( 'contributions' ), 'target=' . $wgTitle->getPartialURL() );
	}

	function showEmailUser( $id ) {
		global $wgEnableEmail, $wgEnableUserEmail, $wgUser;
		return $wgEnableEmail &&
		       $wgEnableUserEmail &&
		       $wgUser->isLoggedIn() && # show only to signed in users
		       0 != $id; # we can only email to non-anons ..
#		       '' != $id->getEmail() && # who must have an email address stored ..
#		       0 != $id->getEmailauthenticationtimestamp() && # .. which is authenticated
#		       1 != $wgUser->getOption('disablemail'); # and not disabled
	}

	function emailUserLink() {
		global $wgTitle;

		return $this->makeKnownLinkObj( Title::makeTitle( NS_SPECIAL, 'Emailuser' ),
		  wfMsg( 'emailuser' ), 'target=' . $wgTitle->getPartialURL() );
	}

	function watchPageLinksLink() {
		global $wgOut, $wgTitle;

		if ( ! $wgOut->isArticleRelated() ) {
			return '(' . wfMsg( 'notanarticle' ) . ')';
		} else {
			return $this->makeKnownLinkObj( Title::makeTitle( NS_SPECIAL,
			  'Recentchangeslinked' ), wfMsg( 'recentchangeslinked' ),
			  'target=' . $wgTitle->getPrefixedURL() );
		}
	}

	function trackbackLink() {
		global $wgTitle;

		return "<a href=\"" . $wgTitle->trackbackURL() . "\">"
			. wfMsg('trackbacklink') . "</a>";
	}

	function otherLanguages() {
		global $wgOut, $wgContLang, $wgHideInterlanguageLinks;

		if ( $wgHideInterlanguageLinks ) {
			return '';
		}

		$a = $wgOut->getLanguageLinks();
		if ( 0 == count( $a ) ) {
			return '';
		}

		$s = wfMsg( 'otherlanguages' ) . ': ';
		$first = true;
		if($wgContLang->isRTL()) $s .= '<span dir="LTR">';
		foreach( $a as $l ) {
			if ( ! $first ) { $s .= ' | '; }
			$first = false;

			$nt = Title::newFromText( $l );
			$url = $nt->escapeFullURL();
			$text = $wgContLang->getLanguageName( $nt->getInterwiki() );

			if ( '' == $text ) { $text = $l; }
			$style = $this->getExternalLinkAttributes( $l, $text );
			$s .= "<a href=\"{$url}\"{$style}>{$text}</a>";
		}
		if($wgContLang->isRTL()) $s .= '</span>';
		return $s;
	}

	function bugReportsLink() {
		$s = $this->makeKnownLink( wfMsgForContent( 'bugreportspage' ),
		  wfMsg( 'bugreports' ) );
		return $s;
	}

	function dateLink() {
		$t1 = Title::newFromText( gmdate( 'F j' ) );
		$t2 = Title::newFromText( gmdate( 'Y' ) );

		$id = $t1->getArticleID();

		if ( 0 == $id ) {
			$s = $this->makeBrokenLink( $t1->getText() );
		} else {
			$s = $this->makeKnownLink( $t1->getText() );
		}
		$s .= ', ';

		$id = $t2->getArticleID();

		if ( 0 == $id ) {
			$s .= $this->makeBrokenLink( $t2->getText() );
		} else {
			$s .= $this->makeKnownLink( $t2->getText() );
		}
		return $s;
	}

	function talkLink() {
		global $wgTitle;

		if ( NS_SPECIAL == $wgTitle->getNamespace() ) {
			# No discussion links for special pages
			return '';
		}

		if( $wgTitle->isTalkPage() ) {
			$link = $wgTitle->getSubjectPage();
			switch( $link->getNamespace() ) {
				case NS_MAIN:
					$text = wfMsg( 'articlepage' );
					break;
				case NS_USER:
					$text = wfMsg( 'userpage' );
					break;
				case NS_PROJECT:
					$text = wfMsg( 'projectpage' );
					break;
				case NS_IMAGE:
					$text = wfMsg( 'imagepage' );
					break;
				case NS_MEDIAWIKI:
					$text = wfMsg( 'mediawikipage' );
					break;
				case NS_TEMPLATE:
					$text = wfMsg( 'templatepage' );
					break;
				case NS_HELP:
					$text = wfMsg( 'viewhelppage' );
					break;
				case NS_CATEGORY:
					$text = wfMsg( 'categorypage' );
					break;
				default:
					$text = wfMsg( 'articlepage' );
			}
		} else {
			$link = $wgTitle->getTalkPage();
			$text = wfMsg( 'talkpage' );
		}

		$s = $this->makeLinkObj( $link, $text );

		return $s;
	}

	function commentLink() {
		global $wgTitle, $wgOut;

		if ( $wgTitle->getNamespace() == NS_SPECIAL ) {
			return '';
		}
		
		# __NEWSECTIONLINK___ changes behaviour here
		# If it's present, the link points to this page, otherwise
		# it points to the talk page
		if( $wgTitle->isTalkPage() ) {
			$title =& $wgTitle;
		} elseif( $wgOut->showNewSectionLink() ) {
			$title =& $wgTitle;
		} else {
			$title =& $wgTitle->getTalkPage();
		}
		
		return $this->makeKnownLinkObj( $title, wfMsg( 'postcomment' ), 'action=edit&section=new' );
	}

	/* these are used extensively in SkinTemplate, but also some other places */
	static function makeSpecialUrl( $name, $urlaction = '' ) {
		$title = Title::makeTitle( NS_SPECIAL, $name );
		return $title->getLocalURL( $urlaction );
	}

	static function makeI18nUrl( $name, $urlaction = '' ) {
		$title = Title::newFromText( wfMsgForContent( $name ) );
		self::checkTitle( $title, $name );
		return $title->getLocalURL( $urlaction );
	}

	static function makeUrl( $name, $urlaction = '' ) {
		$title = Title::newFromText( $name );
		self::checkTitle( $title, $name );
		return $title->getLocalURL( $urlaction );
	}

	# If url string starts with http, consider as external URL, else
	# internal
	static function makeInternalOrExternalUrl( $name ) {
		if ( preg_match( '/^(?:' . wfUrlProtocols() . ')/', $name ) ) {
			return $name;
		} else {
			return self::makeUrl( $name );
		}
	}

	# this can be passed the NS number as defined in Language.php
	static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
		$title = Title::makeTitleSafe( $namespace, $name );
		self::checkTitle( $title, $name );
		return $title->getLocalURL( $urlaction );
	}

	/* these return an array with the 'href' and boolean 'exists' */
	static function makeUrlDetails( $name, $urlaction = '' ) {
		$title = Title::newFromText( $name );
		self::checkTitle( $title, $name );
		return array(
			'href' => $title->getLocalURL( $urlaction ),
			'exists' => $title->getArticleID() != 0 ? true : false
		);
	}

	/**
	 * Make URL details where the article exists (or at least it's convenient to think so)
	 */
	static function makeKnownUrlDetails( $name, $urlaction = '' ) {
		$title = Title::newFromText( $name );
		self::checkTitle( $title, $name );
		return array(
			'href' => $title->getLocalURL( $urlaction ),
			'exists' => true
		);
	}

	# make sure we have some title to operate on
	static function checkTitle( &$title, &$name ) {
		if( !is_object( $title ) ) {
			$title = Title::newFromText( $name );
			if( !is_object( $title ) ) {
				$title = Title::newFromText( '--error: link target missing--' );
			}
		}
	}

	/**
	 * Build an array that represents the sidebar(s), the navigation bar among them
	 *
	 * @return array
	 * @private
	 */
	function buildSidebar() {
		global $parserMemc, $wgEnableSidebarCache;
		global $wgLang, $wgContLang;

		$fname = 'SkinTemplate::buildSidebar';

		wfProfileIn( $fname );

		$key = wfMemcKey( 'sidebar' );
		$cacheSidebar = $wgEnableSidebarCache &&
			($wgLang->getCode() == $wgContLang->getCode());
		
		if ($cacheSidebar) {
			$cachedsidebar = $parserMemc->get( $key );
			if ($cachedsidebar!="") {
				wfProfileOut($fname);
				return $cachedsidebar;
			}
		}

		$bar = array();
		$lines = explode( "\n", wfMsgForContent( 'sidebar' ) );
		foreach ($lines as $line) {
			if (strpos($line, '*') !== 0)
				continue;
			if (strpos($line, '**') !== 0) {
				$line = trim($line, '* ');
				$heading = $line;
			} else {
				if (strpos($line, '|') !== false) { // sanity check
					$line = explode( '|' , trim($line, '* '), 2 );
					$link = wfMsgForContent( $line[0] );
					if ($link == '-')
						continue;
					if (wfEmptyMsg($line[1], $text = wfMsg($line[1])))
						$text = $line[1];
					if (wfEmptyMsg($line[0], $link))
						$link = $line[0];
					$href = self::makeInternalOrExternalUrl( $link );
					$bar[$heading][] = array(
						'text' => $text,
						'href' => $href,
						'id' => 'n-' . strtr($line[1], ' ', '-'),
						'active' => false
					);
				} else { continue; }
			}
		}
		if ($cacheSidebar)
			$cachednotice = $parserMemc->set( $key, $bar, 86400 );
		wfProfileOut( $fname );
		return $bar;
	}
}
?>
