* (bug 15497) Removed encoding attribute from <?xml ?> tags

[mediawiki.git] / includes / LogEventsList.php

<?php
# Copyright (C) 2004 Brion Vibber <brion@pobox.com>, 2008 Aaron Schulz
# http://www.mediawiki.org/
#
# 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

class LogEventsList {
        const NO_ACTION_LINK = 1;

        private $skin;
        private $out;
        public $flags;

        function __construct( $skin, $out, $flags = 0 ) {
                $this->skin = $skin;
                $this->out = $out;
                $this->flags = $flags;
                $this->preCacheMessages();
        }

        /**
         * As we use the same small set of messages in various methods and that
         * they are called often, we call them once and save them in $this->message
         */
        private function preCacheMessages() {
                // Precache various messages
                if( !isset( $this->message ) ) {
                        $messages = 'revertmerge protect_change unblocklink revertmove undeletelink revdel-restore rev-delundel hist';
                        foreach( explode(' ', $messages ) as $msg ) {
                                $this->message[$msg] = wfMsgExt( $msg, array( 'escape') );
                        }
                }
        }

        /**
         * Set page title and show header for this log type
         * @param string $type
         */
        public function showHeader( $type ) {
                if( LogPage::isLogType( $type ) ) {
                        $this->out->setPageTitle( LogPage::logName( $type ) );
                        $this->out->addHtml( LogPage::logHeader( $type ) );
                }
        }

        /**
         * Show options for the log list
         * @param string $type,
         * @param string $user,
         * @param string $page,
         * @param string $pattern
         * @param int $year
         * @parm int $month
         */
        public function showOptions( $type='', $user='', $page='', $pattern='', $year='', $month='' ) {
                global $wgScript, $wgMiserMode;
                $action = htmlspecialchars( $wgScript );
                $title = SpecialPage::getTitleFor( 'Log' );
                $special = htmlspecialchars( $title->getPrefixedDBkey() );

                $this->out->addHTML( "<form action=\"$action\" method=\"get\"><fieldset>" .
                        Xml::element( 'legend', array(), wfMsg( 'log' ) ) .
                        Xml::hidden( 'title', $special ) . "\n" .
                        $this->getTypeMenu( $type ) . "\n" .
                        $this->getUserInput( $user ) . "\n" .
                        $this->getTitleInput( $page ) . "\n" .
                        ( !$wgMiserMode ? ($this->getTitlePattern( $pattern )."\n") : "" ) .
                        "<p>" . $this->getDateMenu( $year, $month ) . "\n" .
                        Xml::submitButton( wfMsg( 'allpagessubmit' ) ) . "</p>\n" .
                        "</fieldset></form>" );
        }

        /**
         * @return string Formatted HTML
         * @param string $queryType
         */
        private function getTypeMenu( $queryType ) {
                global $wgLogRestrictions, $wgUser;

                $html = "<select name='type'>\n";

                $validTypes = LogPage::validTypes();
                $m = array(); // Temporary array

                // First pass to load the log names
                foreach( $validTypes as $type ) {
                        $text = LogPage::logName( $type );
                        $m[$text] = $type;
                }

                // Second pass to sort by name
                ksort($m);

                // Third pass generates sorted XHTML content
                foreach( $m as $text => $type ) {
                        $selected = ($type == $queryType);
                        // Restricted types
                        if ( isset($wgLogRestrictions[$type]) ) {
                                if ( $wgUser->isAllowed( $wgLogRestrictions[$type] ) ) {
                                        $html .= Xml::option( $text, $type, $selected ) . "\n";
                                }
                        } else {
                                $html .= Xml::option( $text, $type, $selected ) . "\n";
                        }
                }

                $html .= '</select>';
                return $html;
        }

        /**
         * @return string Formatted HTML
         * @param string $user
         */
        private function getUserInput( $user ) {
                return Xml::inputLabel( wfMsg( 'specialloguserlabel' ), 'user', 'user', 15, $user );
        }

        /**
         * @return string Formatted HTML
         * @param string $title
         */
        private function getTitleInput( $title ) {
                return Xml::inputLabel( wfMsg( 'speciallogtitlelabel' ), 'page', 'page', 20, $title );
        }

        /**
         * @return string Formatted HTML
         * @param int $year
         * @param int $month
         */
        private function getDateMenu( $year, $month ) {
                # Offset overrides year/month selection
                if( $month && $month !== -1 ) {
                        $encMonth = intval( $month );
                } else {
                        $encMonth = '';
                }
                if ( $year ) {
                        $encYear = intval( $year );
                } else if( $encMonth ) {
                        $thisMonth = intval( gmdate( 'n' ) );
                        $thisYear = intval( gmdate( 'Y' ) );
                        if( intval($encMonth) > $thisMonth ) {
                                $thisYear--;
                        }
                        $encYear = $thisYear;
                } else {
                        $encYear = '';
                }
                return Xml::label( wfMsg( 'year' ), 'year' ) . ' '.
                        Xml::input( 'year', 4, $encYear, array('id' => 'year', 'maxlength' => 4) ) .
                        ' '.
                        Xml::label( wfMsg( 'month' ), 'month' ) . ' '.
                        Xml::monthSelector( $encMonth, -1 );
        }

        /**
         * @return boolean Checkbox
         */
        private function getTitlePattern( $pattern ) {
                return '<span style="white-space: nowrap">' .
                        Xml::checkLabel( wfMsg( 'log-title-wildcard' ), 'pattern', 'pattern', $pattern ) .
                        '</span>';
        }

        public function beginLogEventsList() {
                return "<ul>\n";
        }

        public function endLogEventsList() {
                return "</ul>\n";
        }

                /**
         * @param Row $row a single row from the result set
         * @return string Formatted HTML list item
         * @private
         */
        public function logLine( $row ) {
                global $wgLang, $wgUser, $wgContLang;

                $title = Title::makeTitle( $row->log_namespace, $row->log_title );
                $time = $wgLang->timeanddate( wfTimestamp(TS_MW, $row->log_timestamp), true );
                // User links
                if( self::isDeleted($row,LogPage::DELETED_USER) ) {
                        $userLink = '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
                } else {
                        $userLink = $this->skin->userLink( $row->log_user, $row->user_name ) .
                                $this->skin->userToolLinks( $row->log_user, $row->user_name, true, 0, $row->user_editcount );
                }
                // Comment
                if( self::isDeleted($row,LogPage::DELETED_COMMENT) ) {
                        $comment = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
                } else {
                        $comment = $wgContLang->getDirMark() . $this->skin->commentBlock( $row->log_comment );
                }
                // Extract extra parameters
                $paramArray = LogPage::extractParams( $row->log_params );
                $revert = $del = '';
                // Some user can hide log items and have review links
                if( $wgUser->isAllowed( 'deleterevision' ) ) {
                        $del = $this->showhideLinks( $row ) . ' ';
                }
                // Add review links and such...
                if( ($this->flags & self::NO_ACTION_LINK) || ($row->log_deleted & LogPage::DELETED_ACTION) ) {
                        // Action text is suppressed...
                } else if( self::typeAction($row,'move','move') && !empty($paramArray[0]) && $wgUser->isAllowed( 'move' ) ) {
                        $destTitle = Title::newFromText( $paramArray[0] );
                        if( $destTitle ) {
                                $revert = '(' . $this->skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Movepage' ),
                                        $this->message['revertmove'],
                                        'wpOldTitle=' . urlencode( $destTitle->getPrefixedDBkey() ) .
                                        '&wpNewTitle=' . urlencode( $title->getPrefixedDBkey() ) .
                                        '&wpReason=' . urlencode( wfMsgForContent( 'revertmove' ) ) .
                                        '&wpMovetalk=0' ) . ')';
                        }
                // Show undelete link
                } else if( self::typeAction($row,array('delete','suppress'),'delete') && $wgUser->isAllowed( 'delete' ) ) {
                        $revert = '(' . $this->skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Undelete' ),
                                $this->message['undeletelink'], 'target='. urlencode( $title->getPrefixedDBkey() ) ) . ')';
                // Show unblock link
                } else if( self::typeAction($row,array('block','suppress'),'block') && $wgUser->isAllowed( 'block' ) ) {
                        $revert = '(' .  $this->skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Ipblocklist' ),
                                $this->message['unblocklink'],
                                'action=unblock&ip=' . urlencode( $row->log_title ) ) . ')';
                // Show change protection link
                } else if( self::typeAction($row,'protect',array('modify','protect','unprotect')) ) {
                        $revert = '(' .  $this->skin->makeKnownLinkObj( $title, $this->message['hist'], 
                                'action=history&offset=' . urlencode($row->log_timestamp) ) . ')';
                        if( $wgUser->isAllowed('protect') && $row->log_action != 'unprotect' ) {
                                $revert .= ' (' .  $this->skin->makeKnownLinkObj( $title, $this->message['protect_change'], 
                                        'action=unprotect' ) . ')';
                        }
                // Show unmerge link
                } else if ( self::typeAction($row,'merge','merge') ) {
                        $merge = SpecialPage::getTitleFor( 'Mergehistory' );
                        $revert = '(' .  $this->skin->makeKnownLinkObj( $merge, $this->message['revertmerge'],
                                wfArrayToCGI( array('target' => $paramArray[0], 'dest' => $title->getPrefixedDBkey(), 
                                        'mergepoint' => $paramArray[1] ) ) ) . ')';
                // If an edit was hidden from a page give a review link to the history
                } else if( self::typeAction($row,array('delete','suppress'),'revision') && $wgUser->isAllowed( 'deleterevision' ) ) {
                        if( count($paramArray) == 2 ) {
                                $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
                                // Different revision types use different URL params...
                                $key = $paramArray[0];
                                // Link to each hidden object ID, $paramArray[1] is the url param
                                $Ids = explode( ',', $paramArray[1] );
                                $revParams = '';
                                foreach( $Ids as $n => $id ) {
                                        $revParams .= '&' . urlencode($key) . '[]=' . urlencode($id);
                                }
                                $revert = '(' . $this->skin->makeKnownLinkObj( $revdel, $this->message['revdel-restore'], 
                                        'target=' . $title->getPrefixedUrl() . $revParams ) . ')';
                        }
                // Hidden log items, give review link
                } else if( self::typeAction($row,array('delete','suppress'),'event') && $wgUser->isAllowed( 'deleterevision' ) ) {
                        if( count($paramArray) == 1 ) {
                                $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
                                $Ids = explode( ',', $paramArray[0] );
                                // Link to each hidden object ID, $paramArray[1] is the url param
                                $logParams = '';
                                foreach( $Ids as $n => $id ) {
                                        $logParams .= '&logid[]=' . intval($id);
                                }
                                $revert = '(' . $this->skin->makeKnownLinkObj( $revdel, $this->message['revdel-restore'], 
                                        'target=' . $title->getPrefixedUrl() . $logParams ) . ')';
                        }
                } else {
                        wfRunHooks( 'LogLine', array( $row->log_type, $row->log_action, $title, $paramArray,
                                &$comment, &$revert, $row->log_timestamp ) );
                        // Do nothing. The implementation is handled by the hook modifiying the passed-by-ref parameters.
                }
                // Event description
                if( self::isDeleted($row,LogPage::DELETED_ACTION) ) {
                        $action = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
                } else {
                        $action = LogPage::actionText( $row->log_type, $row->log_action, $title, $this->skin, $paramArray, true );
                }

                return "<li>$del$time $userLink $action $comment $revert</li>\n";
        }

        /**
         * @param Row $row
         * @return string
         */
        private function showhideLinks( $row ) {
                $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
                // If event was hidden from sysops
                if( !self::userCan( $row, LogPage::DELETED_RESTRICTED ) ) {
                        $del = $this->message['rev-delundel'];
                } else if( $row->log_type == 'suppress' ) {
                        // No one should be hiding from the oversight log
                        $del = $this->message['rev-delundel'];
                } else {
                        $target = SpecialPage::getTitleFor( 'Log', $row->log_type );
                        $del = $this->skin->makeKnownLinkObj( $revdel, $this->message['rev-delundel'],
                                'target=' . $target->getPrefixedUrl() . '&logid='.$row->log_id );
                        // Bolden oversighted content
                        if( self::isDeleted( $row, LogPage::DELETED_RESTRICTED ) )
                                $del = "<strong>$del</strong>";
                }
                return "<tt>(<small>$del</small>)</tt>";
        }

        /**
         * @param Row $row
         * @param mixed $type (string/array)
         * @param mixed $action (string/array)
         * @return bool
         */
        public static function typeAction( $row, $type, $action ) {
                $match = is_array($type) ? in_array($row->log_type,$type) : $row->log_type == $type;
                if( $match ) {
                        $match = is_array($action) ? in_array($row->log_action,$action) : $row->log_action == $action;
                }
                return $match;
        }

        /**
         * Determine if the current user is allowed to view a particular
         * field of this log row, if it's marked as deleted.
         * @param Row $row
         * @param int $field
         * @return bool
         */
        public static function userCan( $row, $field ) {
                if( ( $row->log_deleted & $field ) == $field ) {
                        global $wgUser;
                        $permission = ( $row->log_deleted & LogPage::DELETED_RESTRICTED ) == LogPage::DELETED_RESTRICTED
                                ? 'suppressrevision'
                                : 'deleterevision';
                        wfDebug( "Checking for $permission due to $field match on $row->log_deleted\n" );
                        return $wgUser->isAllowed( $permission );
                } else {
                        return true;
                }
        }

        /**
         * @param Row $row
         * @param int $field one of DELETED_* bitfield constants
         * @return bool
         */
        public static function isDeleted( $row, $field ) {
                return ($row->log_deleted & $field) == $field;
        }

        /**
         * Quick function to show a short log extract
         * @param OutputPage $out
         * @param string $type
         * @param string $page
         * @param string $user
         */
        public static function showLogExtract( $out, $type='', $page='', $user='', $limit = NULL ) {
                global $wgUser;
                # Insert list of top 50 or so items
                $loglist = new LogEventsList( $wgUser->getSkin(), $out, 0 );
                $pager = new LogPager( $loglist, $type, $user, $page, '' );
                if( $limit ) $pager->mLimit = $limit;
                $logBody = $pager->getBody();
                if( $logBody ) {
                        $out->addHTML(
                                $loglist->beginLogEventsList() .
                                $logBody .
                                $loglist->endLogEventsList()
                        );
                } else {
                        $out->addWikiMsg( 'logempty' );
                }
        }

         /**
         * SQL clause to skip forbidden log types for this user
         * @param Database $db
         * @returns mixed (string or false)
         */
        public static function getExcludeClause( $db ) {
                global $wgLogRestrictions, $wgUser;
                // Reset the array, clears extra "where" clauses when $par is used
                $hiddenLogs = array();
                // Don't show private logs to unprivileged users
                foreach( $wgLogRestrictions as $logtype => $right ) {
                        if( !$wgUser->isAllowed($right) ) {
                                $safetype = $db->strencode( $logtype );
                                $hiddenLogs[] = $safetype;
                        }
                }
                if( count($hiddenLogs) == 1 ) {
                        return 'log_type != ' . $db->addQuotes( $hiddenLogs[0] );
                } elseif( !empty( $hiddenLogs ) ) {
                        return 'log_type NOT IN (' . $db->makeList($hiddenLogs) . ')';
                }
                return false;
        }
}

/**
 * @ingroup Pager
 */
class LogPager extends ReverseChronologicalPager {
        private $type = '', $user = '', $title = '', $pattern = '';
        public $mLogEventsList;
        /**
        * constructor
        * @param LogEventsList $loglist,
        * @param string $type,
        * @param string $user,
        * @param string $page,
        * @param string $pattern
        * @param array $conds
        */
        function __construct( $list, $type='', $user='', $title='', $pattern='', $conds=array(), $y=false, $m=false ) {
                parent::__construct();
                $this->mConds = $conds;

                $this->mLogEventsList = $list;

                $this->limitType( $type );
                $this->limitUser( $user );
                $this->limitTitle( $title, $pattern );
                $this->getDateCond( $y, $m );
        }

        function getDefaultQuery() {
                $query = parent::getDefaultQuery();
                $query['type'] = $this->type;
                $query['month'] = $this->mMonth;
                $query['year'] = $this->mYear;
                return $query;
        }

        /**
         * Set the log reader to return only entries of the given type.
         * Type restrictions enforced here
         * @param string $type A log type ('upload', 'delete', etc)
         * @private
         */
        private function limitType( $type ) {
                global $wgLogRestrictions, $wgUser;
                // Don't even show header for private logs; don't recognize it...
                if( isset($wgLogRestrictions[$type]) && !$wgUser->isAllowed($wgLogRestrictions[$type]) ) {
                        $type = '';
                }
                // Don't show private logs to unpriviledged users
                $hideLogs = LogEventsList::getExcludeClause( $this->mDb );
                if( $hideLogs !== false ) {
                        $this->mConds[] = $hideLogs;
                }
                if( empty($type) ) {
                        return false;
                }
                $this->type = $type;
                $this->mConds['log_type'] = $type;
        }

        /**
         * Set the log reader to return only entries by the given user.
         * @param string $name (In)valid user name
         * @private
         */
        function limitUser( $name ) {
                if( $name == '' ) {
                        return false;
                }
                $usertitle = Title::makeTitleSafe( NS_USER, $name );
                if( is_null($usertitle) ) {
                        return false;
                }
                /* Fetch userid at first, if known, provides awesome query plan afterwards */
                $userid = User::idFromName( $name );
                if( !$userid ) {
                        /* It should be nicer to abort query at all,
                           but for now it won't pass anywhere behind the optimizer */
                        $this->mConds[] = "NULL";
                } else {
                        $this->mConds['log_user'] = $userid;
                        $this->user = $usertitle->getText();
                }
        }

        /**
         * Set the log reader to return only entries affecting the given page.
         * (For the block and rights logs, this is a user page.)
         * @param string $page Title name as text
         * @private
         */
        function limitTitle( $page, $pattern ) {
                global $wgMiserMode;

                $title = Title::newFromText( $page );
                if( strlen($page) == 0 || !$title instanceof Title )
                        return false;

                $this->title = $title->getPrefixedText();
                $ns = $title->getNamespace();
                # Using the (log_namespace, log_title, log_timestamp) index with a
                # range scan (LIKE) on the first two parts, instead of simple equality,
                # makes it unusable for sorting.  Sorted retrieval using another index
                # would be possible, but then we might have to scan arbitrarily many
                # nodes of that index. Therefore, we need to avoid this if $wgMiserMode
                # is on.
                #
                # This is not a problem with simple title matches, because then we can
                # use the page_time index.  That should have no more than a few hundred
                # log entries for even the busiest pages, so it can be safely scanned
                # in full to satisfy an impossible condition on user or similar.
                if( $pattern && !$wgMiserMode ) {
                        # use escapeLike to avoid expensive search patterns like 't%st%'
                        $safetitle = $this->mDb->escapeLike( $title->getDBkey() );
                        $this->mConds['log_namespace'] = $ns;
                        $this->mConds[] = "log_title LIKE '$safetitle%'";
                        $this->pattern = $pattern;
                } else {
                        $this->mConds['log_namespace'] = $ns;
                        $this->mConds['log_title'] = $title->getDBkey();
                }
        }

        function getQueryInfo() {
                $this->mConds[] = 'user_id = log_user';
                # Don't use the wrong logging index
                if( $this->title || $this->pattern || $this->user ) {
                        $index = array( 'USE INDEX' => array( 'logging' => array('page_time','user_time') ) );
                } else if( $this->type ) {
                        $index = array( 'USE INDEX' => array( 'logging' => 'type_time' ) );
                } else {
                        $index = array( 'USE INDEX' => array( 'logging' => 'times' ) );
                }
                return array(
                        'tables' => array( 'logging', 'user' ),
                        'fields' => array( 'log_type', 'log_action', 'log_user', 'log_namespace', 'log_title', 'log_params',
                                'log_comment', 'log_id', 'log_deleted', 'log_timestamp', 'user_name', 'user_editcount' ),
                        'conds' => $this->mConds,
                        'options' => $index
                );
        }

        function getIndexField() {
                return 'log_timestamp';
        }

        function getStartBody() {
                wfProfileIn( __METHOD__ );
                # Do a link batch query
                if( $this->getNumRows() > 0 ) {
                        $lb = new LinkBatch;
                        while( $row = $this->mResult->fetchObject() ) {
                                $lb->add( $row->log_namespace, $row->log_title );
                                $lb->addObj( Title::makeTitleSafe( NS_USER, $row->user_name ) );
                                $lb->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->user_name ) );
                        }
                        $lb->execute();
                        $this->mResult->seek( 0 );
                }
                wfProfileOut( __METHOD__ );
                return '';
        }

        function formatRow( $row ) {
                return $this->mLogEventsList->logLine( $row );
        }

        public function getType() {
                return $this->type;
        }

        public function getUser() {
                return $this->user;
        }

        public function getPage() {
                return $this->title;
        }

        public function getPattern() {
                return $this->pattern;
        }

        public function getYear() {
                return $this->mYear;
        }

        public function getMonth() {
                return $this->mMonth;
        }
}

/**
 * @deprecated
 * @ingroup SpecialPage
 */
class LogReader {
        var $pager;
        /**
         * @param WebRequest $request For internal use use a FauxRequest object to pass arbitrary parameters.
         */
        function __construct( $request ) {
                global $wgUser, $wgOut;
                # Get parameters
                $type = $request->getVal( 'type' );
                $user = $request->getText( 'user' );
                $title = $request->getText( 'page' );
                $pattern = $request->getBool( 'pattern' );
                $y = $request->getIntOrNull( 'year' );
                $m = $request->getIntOrNull( 'month' );
                # Don't let the user get stuck with a certain date
                $skip = $request->getText( 'offset' ) || $request->getText( 'dir' ) == 'prev';
                if( $skip ) {
                        $y = '';
                        $m = '';
                }
                # Use new list class to output results
                $loglist = new LogEventsList( $wgUser->getSkin(), $wgOut, 0 );
                $this->pager = new LogPager( $loglist, $type, $user, $title, $pattern, $y, $m );
        }

        /**
        * Is there at least one row?
        * @return bool
        */
        public function hasRows() {
                return isset($this->pager) ? ($this->pager->getNumRows() > 0) : false;
        }
}

/**
 * @deprecated
 * @ingroup SpecialPage
 */
class LogViewer {
        const NO_ACTION_LINK = 1;
        /**
         * @var LogReader $reader
         */
        var $reader;
        /**
         * @param LogReader &$reader where to get our data from
         * @param integer $flags Bitwise combination of flags:
         *     LogEventsList::NO_ACTION_LINK   Don't show restore/unblock/block links
         */
        function __construct( &$reader, $flags = 0 ) {
                global $wgUser;
                $this->reader =& $reader;
                $this->reader->pager->mLogEventsList->flags = $flags;
                # Aliases for shorter code...
                $this->pager =& $this->reader->pager;
                $this->list =& $this->reader->pager->mLogEventsList;
        }

        /**
         * Take over the whole output page in $wgOut with the log display.
         */
        public function show() {
                # Set title and add header
                $this->list->showHeader( $pager->getType() );
                # Show form options
                $this->list->showOptions( $this->pager->getType(), $this->pager->getUser(), $this->pager->getPage(),
                        $this->pager->getPattern(), $this->pager->getYear(), $this->pager->getMonth() );
                # Insert list
                $logBody = $this->pager->getBody();
                if( $logBody ) {
                        $wgOut->addHTML(
                                $this->pager->getNavigationBar() .
                                $this->list->beginLogEventsList() .
                                $logBody .
                                $this->list->endLogEventsList() .
                                $this->pager->getNavigationBar()
                        );
                } else {
                        $wgOut->addWikiMsg( 'logempty' );
                }
        }

        /**
         * Output just the list of entries given by the linked LogReader,
         * with extraneous UI elements. Use for displaying log fragments in
         * another page (eg at Special:Undelete)
         * @param OutputPage $out where to send output
         */
        public function showList( &$out ) {
                $logBody = $this->pager->getBody();
                if( $logBody ) {
                        $out->addHTML(
                                $this->list->beginLogEventsList() .
                                $logBody .
                                $this->list->endLogEventsList()
                        );
                } else {
                        $out->addWikiMsg( 'logempty' );
                }
        }
}