skintemplate.php

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

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
# http://www.gnu.org/copyleft/gpl.html

/**
 * Template-filler skin base class
 * Formerly generic PHPTal (http://phptal.sourceforge.net/) skin
 * Based on Brion's smarty skin
 * Copyright (C) Gabriel Wicke -- http://www.aulinx.de/
 *
 * Todo: Needs some serious refactoring into functions that correspond
 * to the computations individual esi snippets need. Most importantly no body
 * parsing for most of those of course.
 *
 * @package MediaWiki
 * @subpackage Skins
 */

require_once 'GlobalFunctions.php';

/**
 * Wrapper object for MediaWiki's localization functions,
 * to be passed to the template engine.
 *
 * @private
 * @package MediaWiki
 */
class MediaWiki_I18N {
	var $_context = array();

	function set($varName, $value) {
		$this->_context[$varName] = $value;
	}

	function translate($value) {
		$fname = 'SkinTemplate-translate';
		wfProfileIn( $fname );

		// Hack for i18n:attributes in PHPTAL 1.0.0 dev version as of 2004-10-23
		$value = preg_replace( '/^string:/', '', $value );

		$value = wfMsg( $value );
		// interpolate variables
		while (preg_match('/\$([0-9]*?)/sm', $value, $m)) {
			list($src, $var) = $m;
			wfSuppressWarnings();
			$varValue = $this->_context[$var];
			wfRestoreWarnings();
			$value = str_replace($src, $varValue, $value);
		}
		wfProfileOut( $fname );
		return $value;
	}
}

/**
 *
 * @package MediaWiki
 */
class SkinTemplate extends Skin {
	/**#@+
	 * @private
	 */

	/**
	 * Name of our skin, set in initPage()
	 * It probably need to be all lower case.
	 */
	var $skinname;

	/**
	 * Stylesheets set to use
	 * Sub directory in ./skins/ where various stylesheets are located
	 */
	var $stylename;

	/**
	 * For QuickTemplate, the name of the subclass which
	 * will actually fill the template.
	 */
	var $template;

	/**#@-*/

	/**
	 * Setup the base parameters...
	 * Child classes should override this to set the name,
	 * style subdirectory, and template filler callback.
	 *
	 * @param OutputPage $out
	 */
	function initPage( &$out ) {
		parent::initPage( $out );
		$this->skinname  = 'monobook';
		$this->stylename = 'monobook';
		$this->template  = 'QuickTemplate';
	}

	/**
	 * Create the template engine object; we feed it a bunch of data
	 * and eventually it spits out some HTML. Should have interface
	 * roughly equivalent to PHPTAL 0.7.
	 *
	 * @param string $callback (or file)
	 * @param string $repository subdirectory where we keep template files
	 * @param string $cache_dir
	 * @return object
	 * @private
	 */
	function setupTemplate( $classname, $repository=false, $cache_dir=false ) {
		return new $classname();
	}

	/**
	 * initialize various variables and generate the template
	 *
	 * @param OutputPage $out
	 * @public
	 */
	function outputPage( &$out ) {
		global $wgTitle, $wgArticle, $wgUser, $wgLang, $wgContLang, $wgOut;
		global $wgScript, $wgStylePath, $wgContLanguageCode;
		global $wgMimeType, $wgJsMimeType, $wgOutputEncoding, $wgRequest;
		global $wgDisableCounters, $wgLogo, $action, $wgFeedClasses, $wgHideInterlanguageLinks;
		global $wgMaxCredits, $wgShowCreditsIfMax;
		global $wgPageShowWatchingUsers;
		global $wgUseTrackbacks;
		global $wgDBname;

		$fname = 'SkinTemplate::outputPage';
		wfProfileIn( $fname );

		// Hook that allows last minute changes to the output page, e.g.
		// adding of CSS or Javascript by extensions.
		wfRunHooks( 'BeforePageDisplay', array( &$out ) );

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

		wfProfileIn( "$fname-init" );
		$this->initPage( $out );

		$this->mTitle =& $wgTitle;
		$this->mUser =& $wgUser;

		$tpl = $this->setupTemplate( $this->template, 'skins' );

		#if ( $wgUseDatabaseMessages ) { // uncomment this to fall back to GetText
		$tpl->setTranslator(new MediaWiki_I18N());
		#}
		wfProfileOut( "$fname-init" );

		wfProfileIn( "$fname-stuff" );
		$this->thispage = $this->mTitle->getPrefixedDbKey();
		$this->thisurl = $this->mTitle->getPrefixedURL();
		$this->loggedin = $wgUser->isLoggedIn();
		$this->iscontent = ($this->mTitle->getNamespace() != NS_SPECIAL );
		$this->iseditable = ($this->iscontent and !($action == 'edit' or $action == 'submit'));
		$this->username = $wgUser->getName();
		$userPage = $wgUser->getUserPage();
		$this->userpage = $userPage->getPrefixedText();

		if ( $wgUser->isLoggedIn() || $this->showIPinHeader() ) {
			$this->userpageUrlDetails = $this->makeUrlDetails($this->userpage);
		} else {
			# This won't be used in the standard skins, but we define it to preserve the interface
			# To save time, we check for existence
			$this->userpageUrlDetails = $this->makeKnownUrlDetails($this->userpage);
		}

		$this->usercss =  $this->userjs = $this->userjsprev = false;
		$this->setupUserCss();
		$this->setupUserJs();
		$this->titletxt = $this->mTitle->getPrefixedText();
		wfProfileOut( "$fname-stuff" );

		wfProfileIn( "$fname-stuff2" );
		$tpl->set( 'title', $wgOut->getPageTitle() );
		$tpl->set( 'pagetitle', $wgOut->getHTMLTitle() );
		$tpl->set( 'displaytitle', $wgOut->mPageLinkTitle );

		$tpl->setRef( "thispage", $this->thispage );
		$subpagestr = $this->subPageSubtitle();
		$tpl->set(
			'subtitle',  !empty($subpagestr)?
			'<span class="subpages">'.$subpagestr.'</span>'.$out->getSubtitle():
			$out->getSubtitle()
		);
		$undelete = $this->getUndeleteLink();
		$tpl->set(
			"undelete", !empty($undelete)?
			'<span class="subpages">'.$undelete.'</span>':
			''
		);

		$tpl->set( 'catlinks', $this->getCategories());
		if( $wgOut->isSyndicated() ) {
			$feeds = array();
			foreach( $wgFeedClasses as $format => $class ) {
				$feeds[$format] = array(
					'text' => $format,
					'href' => $wgRequest->appendQuery( "feed=$format" )
				);
			}
			$tpl->setRef( 'feeds', $feeds );
		} else {
			$tpl->set( 'feeds', false );
		}
		if ($wgUseTrackbacks && $out->isArticleRelated())
			$tpl->set( 'trackbackhtml', $wgTitle->trackbackRDF());

		$tpl->setRef( 'mimetype', $wgMimeType );
		$tpl->setRef( 'jsmimetype', $wgJsMimeType );
		$tpl->setRef( 'charset', $wgOutputEncoding );
		$tpl->set( 'headlinks', $out->getHeadLinks() );
		$tpl->set('headscripts', $out->getScript() );
		$tpl->setRef( 'wgScript', $wgScript );
		$tpl->setRef( 'skinname', $this->skinname );
		$tpl->setRef( 'stylename', $this->stylename );
		$tpl->set( 'printable', $wgRequest->getBool( 'printable' ) );
		$tpl->setRef( 'loggedin', $this->loggedin );
		$tpl->set('nsclass', 'ns-'.$this->mTitle->getNamespace());
		$tpl->set('notspecialpage', $this->mTitle->getNamespace() != NS_SPECIAL);
		/* XXX currently unused, might get useful later
		$tpl->set( "editable", ($this->mTitle->getNamespace() != NS_SPECIAL ) );
		$tpl->set( "exists", $this->mTitle->getArticleID() != 0 );
		$tpl->set( "watch", $this->mTitle->userIsWatching() ? "unwatch" : "watch" );
		$tpl->set( "protect", count($this->mTitle->isProtected()) ? "unprotect" : "protect" );
		$tpl->set( "helppage", wfMsg('helppage'));
		*/
		$tpl->set( 'searchaction', $this->escapeSearchLink() );
		$tpl->set( 'search', trim( $wgRequest->getVal( 'search' ) ) );
		$tpl->setRef( 'stylepath', $wgStylePath );
		$tpl->setRef( 'logopath', $wgLogo );
		$tpl->setRef( "lang", $wgContLanguageCode );
		$tpl->set( 'dir', $wgContLang->isRTL() ? "rtl" : "ltr" );
		$tpl->set( 'rtl', $wgContLang->isRTL() );
		$tpl->set( 'langname', $wgContLang->getLanguageName( $wgContLanguageCode ) );
		$tpl->set( 'showjumplinks', $wgUser->getOption( 'showjumplinks' ) );
		$tpl->setRef( 'username', $this->username );
		$tpl->setRef( 'userpage', $this->userpage);
		$tpl->setRef( 'userpageurl', $this->userpageUrlDetails['href']);
		$tpl->set( 'pagecss', $this->setupPageCss() );
		$tpl->setRef( 'usercss', $this->usercss);
		$tpl->setRef( 'userjs', $this->userjs);
		$tpl->setRef( 'userjsprev', $this->userjsprev);
		global $wgUseSiteJs;
		if ($wgUseSiteJs) {
			if($this->loggedin) {
				$tpl->set( 'jsvarurl', $this->makeUrl('-','action=raw&smaxage=0&gen=js') );
			} else {
				$tpl->set( 'jsvarurl', $this->makeUrl('-','action=raw&gen=js') );
			}
		} else {
			$tpl->set('jsvarurl', false);
		}
		$newtalks = $wgUser->getNewMessageLinks();

		if (count($newtalks) == 1 && $newtalks[0]["wiki"] === $wgDBname) {
			$usertitle = $this->mUser->getUserPage();
			$usertalktitle = $usertitle->getTalkPage();
			if( !$usertalktitle->equals( $this->mTitle ) ) {
				$ntl = wfMsg( 'youhavenewmessages',
					$this->makeKnownLinkObj(
						$usertalktitle,
						wfMsgHtml( 'newmessageslink' ),
						'redirect=no'
					),
					$this->makeKnownLinkObj(
						$usertalktitle,
						wfMsgHtml( 'newmessagesdifflink' ),
						'diff=cur'
					)
				);
				# Disable Cache
				$wgOut->setSquidMaxage(0);
			}
		} else if (count($newtalks)) {
			$sep = str_replace("_", " ", wfMsgHtml("newtalkseperator"));
			$msgs = array();
			foreach ($newtalks as $newtalk) {
				$msgs[] = wfElement("a",
					array('href' => $newtalk["link"]), $newtalk["wiki"]);
			}
			$parts = implode($sep, $msgs);
			$ntl = wfMsgHtml('youhavenewmessagesmulti', $parts);
			$wgOut->setSquidMaxage(0);
		} else {
			$ntl = '';
		}
		wfProfileOut( "$fname-stuff2" );

		wfProfileIn( "$fname-stuff3" );
		$tpl->setRef( 'newtalk', $ntl );
		$tpl->setRef( 'skin', $this);
		$tpl->set( 'logo', $this->logoText() );
		if ( $wgOut->isArticle() and (!isset( $oldid ) or isset( $diff )) and 0 != $wgArticle->getID() ) {
			if ( !$wgDisableCounters ) {
				$viewcount = $wgLang->formatNum( $wgArticle->getCount() );
				if ( $viewcount ) {
					$tpl->set('viewcount', wfMsgExt( 'viewcount', array( 'parseinline' ), $viewcount ) );
				} else {
					$tpl->set('viewcount', false);
				}
			} else {
				$tpl->set('viewcount', false);
			}

			if ($wgPageShowWatchingUsers) {
				$dbr =& wfGetDB( DB_SLAVE );
				extract( $dbr->tableNames( 'watchlist' ) );
				$sql = "SELECT COUNT(*) AS n FROM $watchlist
					WHERE wl_title='" . $dbr->strencode($this->mTitle->getDBKey()) .
					"' AND  wl_namespace=" . $this->mTitle->getNamespace() ;
				$res = $dbr->query( $sql, 'SkinTemplate::outputPage');
				$x = $dbr->fetchObject( $res );
				$numberofwatchingusers = $x->n;
				if ($numberofwatchingusers > 0) {
					$tpl->set('numberofwatchingusers', wfMsg('number_of_watching_users_pageview', $numberofwatchingusers));
				} else {
					$tpl->set('numberofwatchingusers', false);
				}
			} else {
				$tpl->set('numberofwatchingusers', false);
			}

			$tpl->set('copyright',$this->getCopyright());

			$this->credits = false;

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

			$tpl->setRef( 'credits', $this->credits );

		} elseif ( isset( $oldid ) && !isset( $diff ) ) {
			$tpl->set('copyright', $this->getCopyright());
			$tpl->set('viewcount', false);
			$tpl->set('lastmod', false);
			$tpl->set('credits', false);
			$tpl->set('numberofwatchingusers', false);
		} else {
			$tpl->set('copyright', false);
			$tpl->set('viewcount', false);
			$tpl->set('lastmod', false);
			$tpl->set('credits', false);
			$tpl->set('numberofwatchingusers', false);
		}
		wfProfileOut( "$fname-stuff3" );

		wfProfileIn( "$fname-stuff4" );
		$tpl->set( 'copyrightico', $this->getCopyrightIcon() );
		$tpl->set( 'poweredbyico', $this->getPoweredBy() );
		$tpl->set( 'disclaimer', $this->disclaimerLink() );
		$tpl->set( 'privacy', $this->privacyLink() );
		$tpl->set( 'about', $this->aboutLink() );