Merge "Fix positioning of jQuery.tipsy tooltip arrows"

[mediawiki.git] / includes / skins / SkinTemplate.php

<?php
/**
 * 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
 *
 * @file
 */

/**
 * Base class for template-based skins.
 *
 * Template-filler skin base class
 * Formerly generic PHPTal (http://phptal.sourceforge.net/) skin
 * Based on Brion's smarty skin
 * @copyright Copyright © 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.
 *
 * @ingroup Skins
 */
class SkinTemplate extends Skin {
        /**
         * @var string Name of our skin, it probably needs to be all lower case.
         *   Child classes should override the default.
         */
        public $skinname = 'monobook';

        /**
         * @var string For QuickTemplate, the name of the subclass which will
         *   actually fill the template.  Child classes should override the default.
         */
        public $template = 'QuickTemplate';

        /**
         * Add specific styles for this skin
         *
         * @param OutputPage $out
         */
        function setupSkinUserCss( OutputPage $out ) {
                $moduleStyles = array(
                        'mediawiki.legacy.shared',
                        'mediawiki.legacy.commonPrint',
                        'mediawiki.sectionAnchor'
                );
                if ( $out->isSyndicated() ) {
                        $moduleStyles[] = 'mediawiki.feedlink';
                }

                // Deprecated since 1.26: Unconditional loading of mediawiki.ui.button
                // on every page is deprecated. Express a dependency instead.
                if ( strpos( $out->getHTML(), 'mw-ui-button' ) !== false ) {
                        $moduleStyles[] = 'mediawiki.ui.button';
                }

                $out->addModuleStyles( $moduleStyles );
        }

        /**
         * 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 $classname
         * @param bool|string $repository Subdirectory where we keep template files
         * @param bool|string $cache_dir
         * @return QuickTemplate
         * @private
         */
        function setupTemplate( $classname, $repository = false, $cache_dir = false ) {
                return new $classname( $this->getConfig() );
        }

        /**
         * Generates array of language links for the current page
         *
         * @return array
         */
        public function getLanguages() {
                global $wgHideInterlanguageLinks;
                if ( $wgHideInterlanguageLinks ) {
                        return array();
                }

                $userLang = $this->getLanguage();
                $languageLinks = array();

                foreach ( $this->getOutput()->getLanguageLinks() as $languageLinkText ) {
                        $languageLinkParts = explode( ':', $languageLinkText, 2 );
                        $class = 'interlanguage-link interwiki-' . $languageLinkParts[0];
                        unset( $languageLinkParts );

                        $languageLinkTitle = Title::newFromText( $languageLinkText );
                        if ( $languageLinkTitle ) {
                                $ilInterwikiCode = $languageLinkTitle->getInterwiki();
                                $ilLangName = Language::fetchLanguageName( $ilInterwikiCode );

                                if ( strval( $ilLangName ) === '' ) {
                                        $ilDisplayTextMsg = wfMessage( "interlanguage-link-$ilInterwikiCode" );
                                        if ( !$ilDisplayTextMsg->isDisabled() ) {
                                                // Use custom MW message for the display text
                                                $ilLangName = $ilDisplayTextMsg->text();
                                        } else {
                                                // Last resort: fallback to the language link target
                                                $ilLangName = $languageLinkText;
                                        }
                                } else {
                                        // Use the language autonym as display text
                                        $ilLangName = $this->formatLanguageName( $ilLangName );
                                }

                                // CLDR extension or similar is required to localize the language name;
                                // otherwise we'll end up with the autonym again.
                                $ilLangLocalName = Language::fetchLanguageName(
                                        $ilInterwikiCode,
                                        $userLang->getCode()
                                );

                                $languageLinkTitleText = $languageLinkTitle->getText();
                                if ( $ilLangLocalName === '' ) {
                                        $ilFriendlySiteName = wfMessage( "interlanguage-link-sitename-$ilInterwikiCode" );
                                        if ( !$ilFriendlySiteName->isDisabled() ) {
                                                if ( $languageLinkTitleText === '' ) {
                                                        $ilTitle = wfMessage(
                                                                'interlanguage-link-title-nonlangonly',
                                                                $ilFriendlySiteName->text()
                                                        )->text();
                                                } else {
                                                        $ilTitle = wfMessage(
                                                                'interlanguage-link-title-nonlang',
                                                                $languageLinkTitleText,
                                                                $ilFriendlySiteName->text()
                                                        )->text();
                                                }
                                        } else {
                                                // we have nothing friendly to put in the title, so fall back to
                                                // displaying the interlanguage link itself in the title text
                                                // (similar to what is done in page content)
                                                $ilTitle = $languageLinkTitle->getInterwiki() .
                                                        ":$languageLinkTitleText";
                                        }
                                } elseif ( $languageLinkTitleText === '' ) {
                                        $ilTitle = wfMessage(
                                                'interlanguage-link-title-langonly',
                                                $ilLangLocalName
                                        )->text();
                                } else {
                                        $ilTitle = wfMessage(
                                                'interlanguage-link-title',
                                                $languageLinkTitleText,
                                                $ilLangLocalName
                                        )->text();
                                }

                                $ilInterwikiCodeBCP47 = wfBCP47( $ilInterwikiCode );
                                $languageLink = array(
                                        'href' => $languageLinkTitle->getFullURL(),
                                        'text' => $ilLangName,
                                        'title' => $ilTitle,
                                        'class' => $class,
                                        'lang' => $ilInterwikiCodeBCP47,
                                        'hreflang' => $ilInterwikiCodeBCP47,
                                );
                                Hooks::run(
                                        'SkinTemplateGetLanguageLink',
                                        array( &$languageLink, $languageLinkTitle, $this->getTitle(), $this->getOutput() )
                                );
                                $languageLinks[] = $languageLink;
                        }
                }

                return $languageLinks;
        }

        protected function setupTemplateForOutput() {

                $request = $this->getRequest();
                $user = $this->getUser();
                $title = $this->getTitle();

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

                $this->thispage = $title->getPrefixedDBkey();
                $this->titletxt = $title->getPrefixedText();
                $this->userpage = $user->getUserPage()->getPrefixedText();
                $query = array();
                if ( !$request->wasPosted() ) {
                        $query = $request->getValues();
                        unset( $query['title'] );
                        unset( $query['returnto'] );
                        unset( $query['returntoquery'] );
                }
                $this->thisquery = wfArrayToCgi( $query );
                $this->loggedin = $user->isLoggedIn();
                $this->username = $user->getName();

                if ( $this->loggedin ) {
                        $this->userpageUrlDetails = self::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 = self::makeKnownUrlDetails( $this->userpage );
                }

                return $tpl;
        }

        /**
         * initialize various variables and generate the template
         *
         * @param OutputPage $out
         */
        function outputPage( OutputPage $out = null ) {
                Profiler::instance()->setTemplated( true );

                $oldContext = null;
                if ( $out !== null ) {
                        // Deprecated since 1.20, note added in 1.25
                        wfDeprecated( __METHOD__, '1.25' );
                        $oldContext = $this->getContext();
                        $this->setContext( $out->getContext() );
                }

                $out = $this->getOutput();

                $this->initPage( $out );
                $tpl = $this->prepareQuickTemplate( $out );
                // execute template
                $res = $tpl->execute();

                // result may be an error
                $this->printOrError( $res );

                if ( $oldContext ) {
                        $this->setContext( $oldContext );
                }

        }

        /**
         * initialize various variables and generate the template
         *
         * @since 1.23
         * @return QuickTemplate The template to be executed by outputPage
         */
        protected function prepareQuickTemplate() {
                global $wgContLang, $wgScript, $wgStylePath, $wgMimeType, $wgJsMimeType,
                        $wgSitename, $wgLogo, $wgMaxCredits,
                        $wgShowCreditsIfMax, $wgArticlePath,
                        $wgScriptPath, $wgServer;

                $title = $this->getTitle();
                $request = $this->getRequest();
                $out = $this->getOutput();
                $tpl = $this->setupTemplateForOutput();

                $tpl->set( 'title', $out->getPageTitle() );
                $tpl->set( 'pagetitle', $out->getHTMLTitle() );
                $tpl->set( 'displaytitle', $out->mPageLinkTitle );

                $tpl->setRef( 'thispage', $this->thispage );
                $tpl->setRef( 'titleprefixeddbkey', $this->thispage );
                $tpl->set( 'titletext', $title->getText() );
                $tpl->set( 'articleid', $title->getArticleID() );

                $tpl->set( 'isarticle', $out->isArticle() );

                $subpagestr = $this->subPageSubtitle();
                if ( $subpagestr !== '' ) {
                        $subpagestr = '<span class="subpages">' . $subpagestr . '</span>';
                }
                $tpl->set( 'subtitle', $subpagestr . $out->getSubtitle() );

                $undelete = $this->getUndeleteLink();
                if ( $undelete === '' ) {
                        $tpl->set( 'undelete', '' );
                } else {
                        $tpl->set( 'undelete', '<span class="subpages">' . $undelete . '</span>' );
                }

                $tpl->set( 'catlinks', $this->getCategories() );
                if ( $out->isSyndicated() ) {
                        $feeds = array();
                        foreach ( $out->getSyndicationLinks() as $format => $link ) {
                                $feeds[$format] = array(
                                        // Messages: feed-atom, feed-rss
                                        'text' => $this->msg( "feed-$format" )->text(),
                                        'href' => $link
                                );
                        }
                        $tpl->setRef( 'feeds', $feeds );
                } else {
                        $tpl->set( 'feeds', false );
                }

                $tpl->setRef( 'mimetype', $wgMimeType );
                $tpl->setRef( 'jsmimetype', $wgJsMimeType );
                $tpl->set( 'charset', 'UTF-8' );
                $tpl->setRef( 'wgScript', $wgScript );
                $tpl->setRef( 'skinname', $this->skinname );
                $tpl->set( 'skinclass', get_class( $this ) );
                $tpl->setRef( 'skin', $this );
                $tpl->setRef( 'stylename', $this->stylename );
                $tpl->set( 'printable', $out->isPrintable() );
                $tpl->set( 'handheld', $request->getBool( 'handheld' ) );
                $tpl->setRef( 'loggedin', $this->loggedin );
                $tpl->set( 'notspecialpage', !$title->isSpecialPage() );
                $tpl->set( 'searchaction', $this->escapeSearchLink() );
                $tpl->set( 'searchtitle', SpecialPage::getTitleFor( 'Search' )->getPrefixedDBkey() );
                $tpl->set( 'search', trim( $request->getVal( 'search' ) ) );
                $tpl->setRef( 'stylepath', $wgStylePath );
                $tpl->setRef( 'articlepath', $wgArticlePath );
                $tpl->setRef( 'scriptpath', $wgScriptPath );
                $tpl->setRef( 'serverurl', $wgServer );
                $tpl->setRef( 'logopath', $wgLogo );
                $tpl->setRef( 'sitename', $wgSitename );

                $userLang = $this->getLanguage();
                $userLangCode = $userLang->getHtmlCode();
                $userLangDir = $userLang->getDir();

                $tpl->set( 'lang', $userLangCode );
                $tpl->set( 'dir', $userLangDir );
                $tpl->set( 'rtl', $userLang->isRTL() );

                $tpl->set( 'capitalizeallnouns', $userLang->capitalizeAllNouns() ? ' capitalize-all-nouns' : '' );
                $tpl->set( 'showjumplinks', true ); // showjumplinks preference has been removed
                $tpl->set( 'username', $this->loggedin ? $this->username : null );
                $tpl->setRef( 'userpage', $this->userpage );
                $tpl->setRef( 'userpageurl', $this->userpageUrlDetails['href'] );
                $tpl->set( 'userlang', $userLangCode );

                // Users can have their language set differently than the
                // content of the wiki. For these users, tell the web browser
                // that interface elements are in a different language.
                $tpl->set( 'userlangattributes', '' );
                $tpl->set( 'specialpageattributes', '' ); # obsolete
                // Used by VectorBeta to insert HTML before content but after the
                // heading for the page title. Defaults to empty string.
                $tpl->set( 'prebodyhtml', '' );

                if ( $userLangCode !== $wgContLang->getHtmlCode() || $userLangDir !== $wgContLang->getDir() ) {
                        $escUserlang = htmlspecialchars( $userLangCode );
                        $escUserdir = htmlspecialchars( $userLangDir );
                        // Attributes must be in double quotes because htmlspecialchars() doesn't
                        // escape single quotes
                        $attrs = " lang=\"$escUserlang\" dir=\"$escUserdir\"";
                        $tpl->set( 'userlangattributes', $attrs );
                }

                $tpl->set( 'newtalk', $this->getNewtalks() );
                $tpl->set( 'logo', $this->logoText() );

                $tpl->set( 'copyright', false );
                // No longer used
                $tpl->set( 'viewcount', false );
                $tpl->set( 'lastmod', false );
                $tpl->set( 'credits', false );
                $tpl->set( 'numberofwatchingusers', false );
                if ( $out->isArticle() && $title->exists() ) {
                        if ( $this->isRevisionCurrent() ) {
                                if ( $wgMaxCredits != 0 ) {
                                        $tpl->set( 'credits', Action::factory( 'credits', $this->getWikiPage(),
                                                $this->getContext() )->getCredits( $wgMaxCredits, $wgShowCreditsIfMax ) );
                                } else {
                                        $tpl->set( 'lastmod', $this->lastModified() );
                                }
                        }
                        $tpl->set( 'copyright', $this->getCopyright() );
                }

                $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() );

                $tpl->set( 'footerlinks', array(
                        'info' => array(
                                'lastmod',
                                'numberofwatchingusers',
                                'credits',
                                'copyright',
                        ),
                        'places' => array(
                                'privacy',
                                'about',
                                'disclaimer',
                        ),
                ) );

                global $wgFooterIcons;
                $tpl->set( 'footericons', $wgFooterIcons );
                foreach ( $tpl->data['footericons'] as $footerIconsKey => &$footerIconsBlock ) {
                        if ( count( $footerIconsBlock ) > 0 ) {
                                foreach ( $footerIconsBlock as &$footerIcon ) {
                                        if ( isset( $footerIcon['src'] ) ) {
                                                if ( !isset( $footerIcon['width'] ) ) {
                                                        $footerIcon['width'] = 88;
                                                }
                                                if ( !isset( $footerIcon['height'] ) ) {
                                                        $footerIcon['height'] = 31;
                                                }
                                        }
                                }
                        } else {
                                unset( $tpl->data['footericons'][$footerIconsKey] );
                        }
                }

                $tpl->set( 'indicators', $out->getIndicators() );

                $tpl->set( 'sitenotice', $this->getSiteNotice() );
                $tpl->set( 'bottomscripts', $this->bottomScripts() );
                $tpl->set( 'printfooter', $this->printSource() );

                # An ID that includes the actual body text; without categories, contentSub, ...
                $realBodyAttribs = array( 'id' => 'mw-content-text' );

                # Add a mw-content-ltr/rtl class to be able to style based on text direction
                # when the content is different from the UI language, i.e.:
                # not for special pages or file pages AND only when viewing
                if ( !in_array( $title->getNamespace(), array( NS_SPECIAL, NS_FILE ) ) &&
                        Action::getActionName( $this ) === 'view' ) {
                        $pageLang = $title->getPageViewLanguage();
                        $realBodyAttribs['lang'] = $pageLang->getHtmlCode();
                        $realBodyAttribs['dir'] = $pageLang->getDir();
                        $realBodyAttribs['class'] = 'mw-content-' . $pageLang->getDir();
                }

                $out->mBodytext = Html::rawElement( 'div', $realBodyAttribs, $out->mBodytext );
                $tpl->setRef( 'bodytext', $out->mBodytext );

                $language_urls = $this->getLanguages();
                if ( count( $language_urls ) ) {
                        $tpl->setRef( 'language_urls', $language_urls );
                } else {
                        $tpl->set( 'language_urls', false );
                }

                # Personal toolbar
                $tpl->set( 'personal_urls', $this->buildPersonalUrls() );
                $content_navigation = $this->buildContentNavigationUrls();
                $content_actions = $this->buildContentActionUrls( $content_navigation );
                $tpl->setRef( 'content_navigation', $content_navigation );
                $tpl->setRef( 'content_actions', $content_actions );

                $tpl->set( 'sidebar', $this->buildSidebar() );
                $tpl->set( 'nav_urls', $this->buildNavUrls() );

                // Set the head scripts near the end, in case the above actions resulted in added scripts
                $tpl->set( 'headelement', $out->headElement( $this ) );

                $tpl->set( 'debug', '' );
                $tpl->set( 'debughtml', $this->generateDebugHTML() );
                $tpl->set( 'reporttime', wfReportTime() );

                // original version by hansm
                if ( !Hooks::run( 'SkinTemplateOutputPageBeforeExec', array( &$this, &$tpl ) ) ) {
                        wfDebug( __METHOD__ . ": Hook SkinTemplateOutputPageBeforeExec broke outputPage execution!\n" );
                }

                // Set the bodytext to another key so that skins can just output it on its own
                // and output printfooter and debughtml separately
                $tpl->set( 'bodycontent', $tpl->data['bodytext'] );

                // Append printfooter and debughtml onto bodytext so that skins that
                // were already using bodytext before they were split out don't suddenly
                // start not outputting information.
                $tpl->data['bodytext'] .= Html::rawElement(
                        'div',
                        array( 'class' => 'printfooter' ),
                        "\n{$tpl->data['printfooter']}"
                ) . "\n";
                $tpl->data['bodytext'] .= $tpl->data['debughtml'];

                // allow extensions adding stuff after the page content.
                // See Skin::afterContentHook() for further documentation.
                $tpl->set( 'dataAfterContent', $this->afterContentHook() );

                return $tpl;
        }

        /**
         * Get the HTML for the p-personal list
         * @return string
         */
        public function getPersonalToolsList() {
                $tpl = $this->setupTemplateForOutput();
                $tpl->set( 'personal_urls', $this->buildPersonalUrls() );
                $html = '';
                foreach ( $tpl->getPersonalTools() as $key => $item ) {
                        $html .= $tpl->makeListItem( $key, $item );
                }
                return $html;
        }

        /**
         * Format language name for use in sidebar interlanguage links list.
         * By default it is capitalized.
         *
         * @param string $name Language name, e.g. "English" or "español"
         * @return string
         * @private
         */
        function formatLanguageName( $name ) {
                return $this->getLanguage()->ucfirst( $name );
        }

        /**
         * Output the string, or print error message if it's
         * an error object of the appropriate type.
         * For the base class, assume strings all around.
         *
         * @param string $str
         * @private
         */
        function printOrError( $str ) {
                echo $str;
        }

        /**
         * Output a boolean indicating if buildPersonalUrls should output separate
         * login and create account links or output a combined link
         * By default we simply return a global config setting that affects most skins
         * This is setup as a method so that like with $wgLogo and getLogo() a skin
         * can override this setting and always output one or the other if it has
         * a reason it can't output one of the two modes.
         * @return bool
         */
        function useCombinedLoginLink() {
                global $wgUseCombinedLoginLink;
                return $wgUseCombinedLoginLink;
        }

        /**
         * build array of urls for personal toolbar
         * @return array
         */
        protected function buildPersonalUrls() {
                $title = $this->getTitle();
                $request = $this->getRequest();
                $pageurl = $title->getLocalURL();

                /* set up the default links for the personal toolbar */
                $personal_urls = array();

                # Due to bug 32276, if a user does not have read permissions,
                # $this->getTitle() will just give Special:Badtitle, which is
                # not especially useful as a returnto parameter. Use the title
                # from the request instead, if there was one.
                if ( $this->getUser()->isAllowed( 'read' ) ) {
                        $page = $this->getTitle();
                } else {
                        $page = Title::newFromText( $request->getVal( 'title', '' ) );
                }
                $page = $request->getVal( 'returnto', $page );
                $a = array();
                if ( strval( $page ) !== '' ) {
                        $a['returnto'] = $page;
                        $query = $request->getVal( 'returntoquery', $this->thisquery );
                        if ( $query != '' ) {
                                $a['returntoquery'] = $query;
                        }
                }

                $returnto = wfArrayToCgi( $a );
                if ( $this->loggedin ) {
                        $personal_urls['userpage'] = array(
                                'text' => $this->username,
                                'href' => &$this->userpageUrlDetails['href'],
                                'class' => $this->userpageUrlDetails['exists'] ? false : 'new',
                                'active' => ( $this->userpageUrlDetails['href'] == $pageurl ),
                                'dir' => 'auto'
                        );
                        $usertalkUrlDetails = $this->makeTalkUrlDetails( $this->userpage );
                        $personal_urls['mytalk'] = array(
                                'text' => $this->msg( 'mytalk' )->text(),
                                'href' => &$usertalkUrlDetails['href'],
                                'class' => $usertalkUrlDetails['exists'] ? false : 'new',
                                'active' => ( $usertalkUrlDetails['href'] == $pageurl )
                        );
                        $href = self::makeSpecialUrl( 'Preferences' );
                        $personal_urls['preferences'] = array(
                                'text' => $this->msg( 'mypreferences' )->text(),
                                'href' => $href,
                                'active' => ( $href == $pageurl )
                        );

                        if ( $this->getUser()->isAllowed( 'viewmywatchlist' ) ) {
                                $href = self::makeSpecialUrl( 'Watchlist' );
                                $personal_urls['watchlist'] = array(
                                        'text' => $this->msg( 'mywatchlist' )->text(),
                                        'href' => $href,
                                        'active' => ( $href == $pageurl )
                                );
                        }

                        # We need to do an explicit check for Special:Contributions, as we
                        # have to match both the title, and the target, which could come
                        # from request values (Special:Contributions?target=Jimbo_Wales)
                        # or be specified in "sub page" form
                        # (Special:Contributions/Jimbo_Wales). The plot
                        # thickens, because the Title object is altered for special pages,
                        # so it doesn't contain the original alias-with-subpage.
                        $origTitle = Title::newFromText( $request->getText( 'title' ) );
                        if ( $origTitle instanceof Title && $origTitle->isSpecialPage() ) {
                                list( $spName, $spPar ) = SpecialPageFactory::resolveAlias( $origTitle->getText() );
                                $active = $spName == 'Contributions'
                                        && ( ( $spPar && $spPar == $this->username )
                                                || $request->getText( 'target' ) == $this->username );
                        } else {
                                $active = false;
                        }

                        $href = self::makeSpecialUrlSubpage( 'Contributions', $this->username );
                        $personal_urls['mycontris'] = array(
                                'text' => $this->msg( 'mycontris' )->text(),
                                'href' => $href,
                                'active' => $active
                        );
                        $personal_urls['logout'] = array(
                                'text' => $this->msg( 'pt-userlogout' )->text(),
                                'href' => self::makeSpecialUrl( 'Userlogout',
                                        // userlogout link must always contain an & character, otherwise we might not be able
                                        // to detect a buggy precaching proxy (bug 17790)
                                        $title->isSpecial( 'Preferences' ) ? 'noreturnto' : $returnto
                                ),
                                'active' => false
                        );
                } else {
                        $useCombinedLoginLink = $this->useCombinedLoginLink();
                        $loginlink = $this->getUser()->isAllowed( 'createaccount' ) && $useCombinedLoginLink
                                ? 'nav-login-createaccount'
                                : 'pt-login';
                        $is_signup = $request->getText( 'type' ) == 'signup';

                        $login_url = array(
                                'text' => $this->msg( $loginlink )->text(),
                                'href' => self::makeSpecialUrl( 'Userlogin', $returnto ),
                                'active' => $title->isSpecial( 'Userlogin' )
                                        && ( $loginlink == 'nav-login-createaccount' || !$is_signup ),
                        );
                        $createaccount_url = array(
                                'text' => $this->msg( 'pt-createaccount' )->text(),
                                'href' => self::makeSpecialUrl( 'Userlogin', "$returnto&type=signup" ),
                                'active' => $title->isSpecial( 'Userlogin' ) && $is_signup,
                        );

                        // No need to show Talk and Contributions to anons if they can't contribute!
                        if ( User::groupHasPermission( '*', 'edit' ) ) {
                                // Show the text "Not logged in"
                                $personal_urls['anonuserpage'] = array(
                                        'text' => $this->msg( 'notloggedin' )->text()
                                );

                                // Because of caching, we can't link directly to the IP talk and
                                // contributions pages. Instead we use the special page shortcuts
                                // (which work correctly regardless of caching). This means we can't
                                // determine whether these links are active or not, but since major
                                // skins (MonoBook, Vector) don't use this information, it's not a
                                // huge loss.
                                $personal_urls['anontalk'] = array(
                                        'text' => $this->msg( 'anontalk' )->text(),
                                        'href' => self::makeSpecialUrlSubpage( 'Mytalk', false ),
                                        'active' => false
                                );
                                $personal_urls['anoncontribs'] = array(
                                        'text' => $this->msg( 'anoncontribs' )->text(),
                                        'href' => self::makeSpecialUrlSubpage( 'Mycontributions', false ),
                                        'active' => false
                                );
                        }

                        if ( $this->getUser()->isAllowed( 'createaccount' ) && !$useCombinedLoginLink ) {
                                $personal_urls['createaccount'] = $createaccount_url;
                        }

                        $personal_urls['login'] = $login_url;
                }

                Hooks::run( 'PersonalUrls', array( &$personal_urls, &$title, $this ) );
                return $personal_urls;
        }

        /**
         * Builds an array with tab definition
         *
         * @param Title $title Page Where the tab links to
         * @param string|array $message Message key or an array of message keys (will fall back)
         * @param bool $selected Display the tab as selected
         * @param string $query Query string attached to tab URL
         * @param bool $checkEdit Check if $title exists and mark with .new if one doesn't
         *
         * @return array
         */
        function tabAction( $title, $message, $selected, $query = '', $checkEdit = false ) {
                $classes = array();
                if ( $selected ) {
                        $classes[] = 'selected';
                }
                if ( $checkEdit && !$title->isKnown() ) {
                        $classes[] = 'new';
                        if ( $query !== '' ) {
                                $query = 'action=edit&redlink=1&' . $query;
                        } else {
                                $query = 'action=edit&redlink=1';
                        }
                }

                // wfMessageFallback will nicely accept $message as an array of fallbacks
                // or just a single key
                $msg = wfMessageFallback( $message )->setContext( $this->getContext() );
                if ( is_array( $message ) ) {
                        // for hook compatibility just keep the last message name
                        $message = end( $message );
                }
                if ( $msg->exists() ) {
                        $text = $msg->text();
                } else {
                        global $wgContLang;
                        $text = $wgContLang->getConverter()->convertNamespace(
                                MWNamespace::getSubject( $title->getNamespace() ) );
                }

                $result = array();
                if ( !Hooks::run( 'SkinTemplateTabAction', array( &$this,
                                $title, $message, $selected, $checkEdit,
                                &$classes, &$query, &$text, &$result ) ) ) {
                        return $result;
                }

                return array(
                        'class' => implode( ' ', $classes ),
                        'text' => $text,
                        'href' => $title->getLocalURL( $query ),
                        'primary' => true );
        }

        function makeTalkUrlDetails( $name, $urlaction = '' ) {
                $title = Title::newFromText( $name );
                if ( !is_object( $title ) ) {
                        throw new MWException( __METHOD__ . " given invalid pagename $name" );
                }
                $title = $title->getTalkPage();
                self::checkTitle( $title, $name );
                return array(
                        'href' => $title->getLocalURL( $urlaction ),
                        'exists' => $title->isKnown(),
                );
        }

        /**
         * @todo is this even used?
         */
        function makeArticleUrlDetails( $name, $urlaction = '' ) {
                $title = Title::newFromText( $name );
                $title = $title->getSubjectPage();
                self::checkTitle( $title, $name );
                return array(
                        'href' => $title->getLocalURL( $urlaction ),
                        'exists' => $title->exists(),
                );
        }

        /**
         * a structured array of links usually used for the tabs in a skin
         *
         * There are 4 standard sections
         * namespaces: Used for namespace tabs like special, page, and talk namespaces
         * views: Used for primary page views like read, edit, history
         * actions: Used for most extra page actions like deletion, protection, etc...
         * variants: Used to list the language variants for the page
         *
         * Each section's value is a key/value array of links for that section.
         * The links themselves have these common keys:
         * - class: The css classes to apply to the tab
         * - text: The text to display on the tab
         * - href: The href for the tab to point to
         * - rel: An optional rel= for the tab's link
         * - redundant: If true the tab will be dropped in skins using content_actions
         *   this is useful for tabs like "Read" which only have meaning in skins that
         *   take special meaning from the grouped structure of content_navigation
         *
         * Views also have an extra key which can be used:
         * - primary: If this is not true skins like vector may try to hide the tab
         *            when the user has limited space in their browser window
         *
         * content_navigation using code also expects these ids to be present on the
         * links, however these are usually automatically generated by SkinTemplate
         * itself and are not necessary when using a hook. The only things these may
         * matter to are people modifying content_navigation after it's initial creation:
         * - id: A "preferred" id, most skins are best off outputting this preferred
         *   id for best compatibility.
         * - tooltiponly: This is set to true for some tabs in cases where the system
         *   believes that the accesskey should not be added to the tab.
         *
         * @return array
         */
        protected function buildContentNavigationUrls() {
                global $wgDisableLangConversion;

                // Display tabs for the relevant title rather than always the title itself
                $title = $this->getRelevantTitle();
                $onPage = $title->equals( $this->getTitle() );

                $out = $this->getOutput();
                $request = $this->getRequest();
                $user = $this->getUser();

                $content_navigation = array(
                        'namespaces' => array(),
                        'views' => array(),
                        'actions' => array(),
                        'variants' => array()
                );

                // parameters
                $action = $request->getVal( 'action', 'view' );

                $userCanRead = $title->quickUserCan( 'read', $user );

                $preventActiveTabs = false;
                Hooks::run( 'SkinTemplatePreventOtherActiveTabs', array( &$this, &$preventActiveTabs ) );

                // Checks if page is some kind of content
                if ( $title->canExist() ) {
                        // Gets page objects for the related namespaces
                        $subjectPage = $title->getSubjectPage();
                        $talkPage = $title->getTalkPage();

                        // Determines if this is a talk page
                        $isTalk = $title->isTalkPage();

                        // Generates XML IDs from namespace names
                        $subjectId = $title->getNamespaceKey( '' );

                        if ( $subjectId == 'main' ) {
                                $talkId = 'talk';
                        } else {
                                $talkId = "{$subjectId}_talk";
                        }

                        $skname = $this->skinname;

                        // Adds namespace links
                        $subjectMsg = array( "nstab-$subjectId" );
                        if ( $subjectPage->isMainPage() ) {
                                array_unshift( $subjectMsg, 'mainpage-nstab' );
                        }
                        $content_navigation['namespaces'][$subjectId] = $this->tabAction(
                                $subjectPage, $subjectMsg, !$isTalk && !$preventActiveTabs, '', $userCanRead
                        );
                        $content_navigation['namespaces'][$subjectId]['context'] = 'subject';
                        $content_navigation['namespaces'][$talkId] = $this->tabAction(
                                $talkPage, array( "nstab-$talkId", 'talk' ), $isTalk && !$preventActiveTabs, '', $userCanRead
                        );
                        $content_navigation['namespaces'][$talkId]['context'] = 'talk';

                        if ( $userCanRead ) {
                                $isForeignFile = $title->inNamespace( NS_FILE ) && $this->canUseWikiPage() &&
                                        $this->getWikiPage() instanceof WikiFilePage && !$this->getWikiPage()->isLocal();

                                // Adds view view link
                                if ( $title->exists() || $isForeignFile ) {
                                        $content_navigation['views']['view'] = $this->tabAction(
                                                $isTalk ? $talkPage : $subjectPage,
                                                array( "$skname-view-view", 'view' ),
                                                ( $onPage && ( $action == 'view' || $action == 'purge' ) ), '', true
                                        );
                                        // signal to hide this from simple content_actions
                                        $content_navigation['views']['view']['redundant'] = true;
                                }

                                // If it is a non-local file, show a link to the file in its own repository
                                if ( $isForeignFile ) {
                                        $file = $this->getWikiPage()->getFile();
                                        $content_navigation['views']['view-foreign'] = array(
                                                'class' => '',
                                                'text' => wfMessageFallback( "$skname-view-foreign", 'view-foreign' )->
                                                        setContext( $this->getContext() )->
                                                        params( $file->getRepo()->getDisplayName() )->text(),
                                                'href' => $file->getDescriptionUrl(),
                                                'primary' => false,
                                        );
                                }

                                // Checks if user can edit the current page if it exists or create it otherwise
                                if ( $title->quickUserCan( 'edit', $user )
                                        && ( $title->exists() || $title->quickUserCan( 'create', $user ) )
                                ) {
                                        // Builds CSS class for talk page links
                                        $isTalkClass = $isTalk ? ' istalk' : '';
                                        // Whether the user is editing the page
                                        $isEditing = $onPage && ( $action == 'edit' || $action == 'submit' );
                                        // Whether to show the "Add a new section" tab
                                        // Checks if this is a current rev of talk page and is not forced to be hidden
                                        $showNewSection = !$out->forceHideNewSectionLink()
                                                && ( ( $isTalk && $this->isRevisionCurrent() ) || $out->showNewSectionLink() );
                                        $section = $request->getVal( 'section' );

                                        if ( $title->exists()
                                                || ( $title->getNamespace() == NS_MEDIAWIKI
                                                        && $title->getDefaultMessageText() !== false
                                                )
                                        ) {
                                                $msgKey = $isForeignFile ? 'edit-local' : 'edit';
                                        } else {
                                                $msgKey = $isForeignFile ? 'create-local' : 'create';
                                        }
                                        $content_navigation['views']['edit'] = array(
                                                'class' => ( $isEditing && ( $section !== 'new' || !$showNewSection )
                                                        ? 'selected'
                                                        : ''
                                                ) . $isTalkClass,
                                                'text' => wfMessageFallback( "$skname-view-$msgKey", $msgKey )
                                                        ->setContext( $this->getContext() )->text(),
                                                'href' => $title->getLocalURL( $this->editUrlOptions() ),
                                                'primary' => !$isForeignFile, // don't collapse this in vector
                                        );

                                        // section link
                                        if ( $showNewSection ) {
                                                // Adds new section link
                                                // $content_navigation['actions']['addsection']
                                                $content_navigation['views']['addsection'] = array(
                                                        'class' => ( $isEditing && $section == 'new' ) ? 'selected' : false,
                                                        'text' => wfMessageFallback( "$skname-action-addsection", 'addsection' )
                                                                ->setContext( $this->getContext() )->text(),
                                                        'href' => $title->getLocalURL( 'action=edit&section=new' )
                                                );
                                        }
                                // Checks if the page has some kind of viewable content
                                } elseif ( $title->hasSourceText() ) {
                                        // Adds view source view link
                                        $content_navigation['views']['viewsource'] = array(
                                                'class' => ( $onPage && $action == 'edit' ) ? 'selected' : false,
                                                'text' => wfMessageFallback( "$skname-action-viewsource", 'viewsource' )
                                                        ->setContext( $this->getContext() )->text(),
                                                'href' => $title->getLocalURL( $this->editUrlOptions() ),
                                                'primary' => true, // don't collapse this in vector
                                        );
                                }

                                // Checks if the page exists
                                if ( $title->exists() ) {
                                        // Adds history view link
                                        $content_navigation['views']['history'] = array(
                                                'class' => ( $onPage && $action == 'history' ) ? 'selected' : false,
                                                'text' => wfMessageFallback( "$skname-view-history", 'history_short' )
                                                        ->setContext( $this->getContext() )->text(),
                                                'href' => $title->getLocalURL( 'action=history' ),
                                        );

                                        if ( $title->quickUserCan( 'delete', $user ) ) {
                                                $content_navigation['actions']['delete'] = array(
                                                        'class' => ( $onPage && $action == 'delete' ) ? 'selected' : false,
                                                        'text' => wfMessageFallback( "$skname-action-delete", 'delete' )
                                                                ->setContext( $this->getContext() )->text(),
                                                        'href' => $title->getLocalURL( 'action=delete' )
                                                );
                                        }

                                        if ( $title->quickUserCan( 'move', $user ) ) {
                                                $moveTitle = SpecialPage::getTitleFor( 'Movepage', $title->getPrefixedDBkey() );
                                                $content_navigation['actions']['move'] = array(
                                                        'class' => $this->getTitle()->isSpecial( 'Movepage' ) ? 'selected' : false,
                                                        'text' => wfMessageFallback( "$skname-action-move", 'move' )
                                                                ->setContext( $this->getContext() )->text(),
                                                        'href' => $moveTitle->getLocalURL()
                                                );
                                        }
                                } else {
                                        // article doesn't exist or is deleted
                                        if ( $user->isAllowed( 'deletedhistory' ) ) {
                                                $n = $title->isDeleted();
                                                if ( $n ) {
                                                        $undelTitle = SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedDBkey() );
                                                        // If the user can't undelete but can view deleted
                                                        // history show them a "View .. deleted" tab instead.
                                                        $msgKey = $user->isAllowed( 'undelete' ) ? 'undelete' : 'viewdeleted';
                                                        $content_navigation['actions']['undelete'] = array(
                                                                'class' => $this->getTitle()->isSpecial( 'Undelete' ) ? 'selected' : false,
                                                                'text' => wfMessageFallback( "$skname-action-$msgKey", "{$msgKey}_short" )
                                                                        ->setContext( $this->getContext() )->numParams( $n )->text(),
                                                                'href' => $undelTitle->getLocalURL()
                                                        );
                                                }
                                        }
                                }

                                if ( $title->quickUserCan( 'protect', $user ) && $title->getRestrictionTypes() &&
                                        MWNamespace::getRestrictionLevels( $title->getNamespace(), $user ) !== array( '' )
                                ) {
                                        $mode = $title->isProtected() ? 'unprotect' : 'protect';
                                        $content_navigation['actions'][$mode] = array(
                                                'class' => ( $onPage && $action == $mode ) ? 'selected' : false,
                                                'text' => wfMessageFallback( "$skname-action-$mode", $mode )
                                                        ->setContext( $this->getContext() )->text(),
                                                'href' => $title->getLocalURL( "action=$mode" )
                                        );
                                }

                                // Checks if the user is logged in
                                if ( $this->loggedin && $user->isAllowedAll( 'viewmywatchlist', 'editmywatchlist' ) ) {
                                        /**
                                         * The following actions use messages which, if made particular to
                                         * the any specific skins, would break the Ajax code which makes this
                                         * action happen entirely inline. OutputPage::getJSVars
                                         * defines a set of messages in a javascript object - and these
                                         * messages are assumed to be global for all skins. Without making
                                         * a change to that procedure these messages will have to remain as
                                         * the global versions.
                                         */
                                        $mode = $user->isWatched( $title ) ? 'unwatch' : 'watch';
                                        $content_navigation['actions'][$mode] = array(
                                                'class' => 'mw-watchlink ' . (
                                                        $onPage && ( $action == 'watch' || $action == 'unwatch' ) ? 'selected' : ''
                                                ),
                                                // uses 'watch' or 'unwatch' message
                                                'text' => $this->msg( $mode )->text(),
                                                'href' => $title->getLocalURL( array( 'action' => $mode ) )
                                        );
                                }
                        }

                        Hooks::run( 'SkinTemplateNavigation', array( &$this, &$content_navigation ) );

                        if ( $userCanRead && !$wgDisableLangConversion ) {
                                $pageLang = $title->getPageLanguage();
                                // Gets list of language variants
                                $variants = $pageLang->getVariants();
                                // Checks that language conversion is enabled and variants exist
                                // And if it is not in the special namespace
                                if ( count( $variants ) > 1 ) {
                                        // Gets preferred variant (note that user preference is
                                        // only possible for wiki content language variant)
                                        $preferred = $pageLang->getPreferredVariant();
                                        if ( Action::getActionName( $this ) === 'view' ) {
                                                $params = $request->getQueryValues();
                                                unset( $params['title'] );
                                        } else {
                                                $params = array();
                                        }
                                        // Loops over each variant
                                        foreach ( $variants as $code ) {
                                                // Gets variant name from language code
                                                $varname = $pageLang->getVariantname( $code );
                                                // Appends variant link
                                                $content_navigation['variants'][] = array(
                                                        'class' => ( $code == $preferred ) ? 'selected' : false,
                                                        'text' => $varname,
                                                        'href' => $title->getLocalURL( array( 'variant' => $code ) + $params ),
                                                        'lang' => wfBCP47( $code ),
                                                        'hreflang' => wfBCP47( $code ),
                                                );
                                        }
                                }
                        }
                } else {
                        // If it's not content, it's got to be a special page
                        $content_navigation['namespaces']['special'] = array(
                                'class' => 'selected',
                                'text' => $this->msg( 'nstab-special' )->text(),
                                'href' => $request->getRequestURL(), // @see: bug 2457, bug 2510
                                'context' => 'subject'
                        );

                        Hooks::run( 'SkinTemplateNavigation::SpecialPage',
                                array( &$this, &$content_navigation ) );
                }

                // Equiv to SkinTemplateContentActions
                Hooks::run( 'SkinTemplateNavigation::Universal', array( &$this, &$content_navigation ) );

                // Setup xml ids and tooltip info
                foreach ( $content_navigation as $section => &$links ) {
                        foreach ( $links as $key => &$link ) {
                                $xmlID = $key;
                                if ( isset( $link['context'] ) && $link['context'] == 'subject' ) {
                                        $xmlID = 'ca-nstab-' . $xmlID;
                                } elseif ( isset( $link['context'] ) && $link['context'] == 'talk' ) {
                                        $xmlID = 'ca-talk';
                                        $link['rel'] = 'discussion';
                                } elseif ( $section == 'variants' ) {
                                        $xmlID = 'ca-varlang-' . $xmlID;
                                } else {
                                        $xmlID = 'ca-' . $xmlID;
                                }
                                $link['id'] = $xmlID;
                        }
                }

                # We don't want to give the watch tab an accesskey if the
                # page is being edited, because that conflicts with the
                # accesskey on the watch checkbox.  We also don't want to
                # give the edit tab an accesskey, because that's fairly
                # superfluous and conflicts with an accesskey (Ctrl-E) often
                # used for editing in Safari.
                if ( in_array( $action, array( 'edit', 'submit' ) ) ) {
                        if ( isset( $content_navigation['views']['edit'] ) ) {
                                $content_navigation['views']['edit']['tooltiponly'] = true;
                        }
                        if ( isset( $content_navigation['actions']['watch'] ) ) {
                                $content_navigation['actions']['watch']['tooltiponly'] = true;
                        }
                        if ( isset( $content_navigation['actions']['unwatch'] ) ) {
                                $content_navigation['actions']['unwatch']['tooltiponly'] = true;
                        }
                }

                return $content_navigation;
        }

        /**
         * an array of edit links by default used for the tabs
         * @param array $content_navigation
         * @return array
         */
        private function buildContentActionUrls( $content_navigation ) {

                // content_actions has been replaced with content_navigation for backwards
                // compatibility and also for skins that just want simple tabs content_actions
                // is now built by flattening the content_navigation arrays into one

                $content_actions = array();

                foreach ( $content_navigation as $links ) {
                        foreach ( $links as $key => $value ) {
                                if ( isset( $value['redundant'] ) && $value['redundant'] ) {
                                        // Redundant tabs are dropped from content_actions
                                        continue;
                                }

                                // content_actions used to have ids built using the "ca-$key" pattern
                                // so the xmlID based id is much closer to the actual $key that we want
                                // for that reason we'll just strip out the ca- if present and use
                                // the latter potion of the "id" as the $key
                                if ( isset( $value['id'] ) && substr( $value['id'], 0, 3 ) == 'ca-' ) {
                                        $key = substr( $value['id'], 3 );
                                }

                                if ( isset( $content_actions[$key] ) ) {
                                        wfDebug( __METHOD__ . ": Found a duplicate key for $key while flattening " .
                                                "content_navigation into content_actions.\n" );
                                        continue;
                                }

                                $content_actions[$key] = $value;
                        }
                }

                return $content_actions;
        }

        /**
         * build array of common navigation links
         * @return array
         */
        protected function buildNavUrls() {
                global $wgUploadNavigationUrl;

                $out = $this->getOutput();
                $request = $this->getRequest();

                $nav_urls = array();
                $nav_urls['mainpage'] = array( 'href' => self::makeMainPageUrl() );
                if ( $wgUploadNavigationUrl ) {
                        $nav_urls['upload'] = array( 'href' => $wgUploadNavigationUrl );
                } elseif ( UploadBase::isEnabled() && UploadBase::isAllowed( $this->getUser() ) === true ) {
                        $nav_urls['upload'] = array( 'href' => self::makeSpecialUrl( 'Upload' ) );
                } else {
                        $nav_urls['upload'] = false;
                }
                $nav_urls['specialpages'] = array( 'href' => self::makeSpecialUrl( 'Specialpages' ) );

                $nav_urls['print'] = false;
                $nav_urls['permalink'] = false;
                $nav_urls['info'] = false;
                $nav_urls['whatlinkshere'] = false;
                $nav_urls['recentchangeslinked'] = false;
                $nav_urls['contributions'] = false;
                $nav_urls['log'] = false;
                $nav_urls['blockip'] = false;
                $nav_urls['emailuser'] = false;
                $nav_urls['userrights'] = false;

                // A print stylesheet is attached to all pages, but nobody ever
                // figures that out. :)  Add a link...
                if ( !$out->isPrintable() && ( $out->isArticle() || $this->getTitle()->isSpecialPage() ) ) {
                        $nav_urls['print'] = array(
                                'text' => $this->msg( 'printableversion' )->text(),
                                'href' => $this->getTitle()->getLocalURL(
                                        $request->appendQueryValue( 'printable', 'yes', true ) )
                        );
                }

                if ( $out->isArticle() ) {
                        // Also add a "permalink" while we're at it
                        $revid = $this->getRevisionId();
                        if ( $revid ) {
                                $nav_urls['permalink'] = array(
                                        'text' => $this->msg( 'permalink' )->text(),
                                        'href' => $this->getTitle()->getLocalURL( "oldid=$revid" )
                                );
                        }

                        // Use the copy of revision ID in case this undocumented, shady hook tries to mess with internals
                        Hooks::run( 'SkinTemplateBuildNavUrlsNav_urlsAfterPermalink',
                                array( &$this, &$nav_urls, &$revid, &$revid ) );
                }

                if ( $out->isArticleRelated() ) {
                        $nav_urls['whatlinkshere'] = array(
                                'href' => SpecialPage::getTitleFor( 'Whatlinkshere', $this->thispage )->getLocalURL()
                        );

                        $nav_urls['info'] = array(
                                'text' => $this->msg( 'pageinfo-toolboxlink' )->text(),
                                'href' => $this->getTitle()->getLocalURL( "action=info" )
                        );

                        if ( $this->getTitle()->exists() ) {
                                $nav_urls['recentchangeslinked'] = array(
                                        'href' => SpecialPage::getTitleFor( 'Recentchangeslinked', $this->thispage )->getLocalURL()
                                );
                        }
                }

                $user = $this->getRelevantUser();
                if ( $user ) {
                        $rootUser = $user->getName();

                        $nav_urls['contributions'] = array(
                                'text' => $this->msg( 'contributions', $rootUser )->text(),
                                'href' => self::makeSpecialUrlSubpage( 'Contributions', $rootUser )
                        );

                        $nav_urls['log'] = array(
                                'href' => self::makeSpecialUrlSubpage( 'Log', $rootUser )
                        );

                        if ( $this->getUser()->isAllowed( 'block' ) ) {
                                $nav_urls['blockip'] = array(
                                        'text' => $this->msg( 'blockip', $rootUser )->text(),
                                        'href' => self::makeSpecialUrlSubpage( 'Block', $rootUser )
                                );
                        }

                        if ( $this->showEmailUser( $user ) ) {
                                $nav_urls['emailuser'] = array(
                                        'href' => self::makeSpecialUrlSubpage( 'Emailuser', $rootUser )
                                );
                        }

                        if ( !$user->isAnon() ) {
                                $sur = new UserrightsPage;
                                $sur->setContext( $this->getContext() );
                                if ( $sur->userCanExecute( $this->getUser() ) ) {
                                        $nav_urls['userrights'] = array(
                                                'href' => self::makeSpecialUrlSubpage( 'Userrights', $rootUser )
                                        );
                                }
                        }
                }

                return $nav_urls;
        }

        /**
         * Generate strings used for xml 'id' names
         * @return string
         */
        protected function getNameSpaceKey() {
                return $this->getTitle()->getNamespaceKey();
        }
}