--- /dev/null
+<?php
+/**
+ * Page history
+ *
+ * Split off from Article.php and Skin.php, 2003-12-22
+ * @file
+ */
+
+/**
+ * This class handles printing the history page for an article. In order to
+ * be efficient, it uses timestamps rather than offsets for paging, to avoid
+ * costly LIMIT,offset queries.
+ *
+ * Construct it by passing in an Article, and call $h->history() to print the
+ * history.
+ *
+ */
+class HistoryPage {
+ const DIR_PREV = 0;
+ const DIR_NEXT = 1;
+
+ var $article, $title, $skin;
+
+ /**
+ * Construct a new HistoryPage.
+ *
+ * @param $article Article
+ */
+ function __construct( $article ) {
+ global $wgUser;
+ $this->article = $article;
+ $this->title = $article->getTitle();
+ $this->skin = $wgUser->getSkin();
+ $this->preCacheMessages();
+ }
+
+ function getArticle() {
+ return $this->article;
+ }
+
+ function getTitle() {
+ return $this->title;
+ }
+
+ /**
+ * 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
+ */
+ function preCacheMessages() {
+ // Precache various messages
+ if( !isset( $this->message ) ) {
+ $msgs = array( 'cur', 'last', 'pipe-separator' );
+ foreach( $msgs as $msg ) {
+ $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities') );
+ }
+ }
+ }
+
+ /**
+ * Print the history page for an article.
+ * @return nothing
+ */
+ function history() {
+ global $wgOut, $wgRequest, $wgScript;
+
+ /*
+ * Allow client caching.
+ */
+ if( $wgOut->checkLastModified( $this->article->getTouched() ) )
+ return; // Client cache fresh and headers sent, nothing more to do.
+
+ wfProfileIn( __METHOD__ );
+
+ /*
+ * Setup page variables.
+ */
+ $wgOut->setPageTitle( wfMsg( 'history-title', $this->title->getPrefixedText() ) );
+ $wgOut->setPageTitleActionText( wfMsg( 'history_short' ) );
+ $wgOut->setArticleFlag( false );
+ $wgOut->setArticleRelated( true );
+ $wgOut->setRobotPolicy( 'noindex,nofollow' );
+ $wgOut->setSyndicated( true );
+ $wgOut->setFeedAppendQuery( 'action=history' );
+ $wgOut->addScriptFile( 'history.js' );
+
+ $logPage = SpecialPage::getTitleFor( 'Log' );
+ $logLink = $this->skin->link(
+ $logPage,
+ wfMsgHtml( 'viewpagelogs' ),
+ array(),
+ array( 'page' => $this->title->getPrefixedText() ),
+ array( 'known', 'noclasses' )
+ );
+ $wgOut->setSubtitle( $logLink );
+
+ $feedType = $wgRequest->getVal( 'feed' );
+ if( $feedType ) {
+ wfProfileOut( __METHOD__ );
+ return $this->feed( $feedType );
+ }
+
+ /*
+ * Fail if article doesn't exist.
+ */
+ if( !$this->title->exists() ) {
+ $wgOut->addWikiMsg( 'nohistory' );
+ # show deletion/move log if there is an entry
+ LogEventsList::showLogExtract(
+ $wgOut,
+ array( 'delete', 'move' ),
+ $this->title->getPrefixedText(),
+ '',
+ array( 'lim' => 10,
+ 'conds' => array( "log_action != 'revision'" ),
+ 'showIfEmpty' => false,
+ 'msgKey' => array( 'moveddeleted-notice' )
+ )
+ );
+ wfProfileOut( __METHOD__ );
+ return;
+ }
+
+ /**
+ * Add date selector to quickly get to a certain time
+ */
+ $year = $wgRequest->getInt( 'year' );
+ $month = $wgRequest->getInt( 'month' );
+ $tagFilter = $wgRequest->getVal( 'tagfilter' );
+ $tagSelector = ChangeTags::buildTagFilterSelector( $tagFilter );
+ /**
+ * Option to show only revisions that have been (partially) hidden via RevisionDelete
+ */
+ if ( $wgRequest->getBool( 'deleted' ) ) {
+ $conds = array("rev_deleted != '0'");
+ } else {
+ $conds = array();
+ }
+ $checkDeleted = Xml::checkLabel( wfMsg( 'history-show-deleted' ),
+ 'deleted', 'mw-show-deleted-only', $wgRequest->getBool( 'deleted' ) ) . "\n";
+
+ $action = htmlspecialchars( $wgScript );
+ $wgOut->addHTML(
+ "<form action=\"$action\" method=\"get\" id=\"mw-history-searchform\">" .
+ Xml::fieldset(
+ wfMsg( 'history-fieldset-title' ),
+ false,
+ array( 'id' => 'mw-history-search' )
+ ) .
+ Xml::hidden( 'title', $this->title->getPrefixedDBKey() ) . "\n" .
+ Xml::hidden( 'action', 'history' ) . "\n" .
+ Xml::dateMenu( $year, $month ) . ' ' .
+ ( $tagSelector ? ( implode( ' ', $tagSelector ) . ' ' ) : '' ) .
+ $checkDeleted .
+ Xml::submitButton( wfMsg( 'allpagessubmit' ) ) . "\n" .
+ '</fieldset></form>'
+ );
+
+ wfRunHooks( 'PageHistoryBeforeList', array( &$this->article ) );
+
+ /**
+ * Do the list
+ */
+ $pager = new HistoryPager( $this, $year, $month, $tagFilter, $conds );
+ $wgOut->addHTML(
+ $pager->getNavigationBar() .
+ $pager->getBody() .
+ $pager->getNavigationBar()
+ );
+
+ wfProfileOut( __METHOD__ );
+ }
+
+ /**
+ * Fetch an array of revisions, specified by a given limit, offset and
+ * direction. This is now only used by the feeds. It was previously
+ * used by the main UI but that's now handled by the pager.
+ *
+ * @param $limit Integer: the limit number of revisions to get
+ * @param $offset Integer
+ * @param $direction Integer: either HistoryPage::DIR_PREV or HistoryPage::DIR_NEXT
+ * @return ResultWrapper
+ */
+ function fetchRevisions( $limit, $offset, $direction ) {
+ $dbr = wfGetDB( DB_SLAVE );
+
+ if( $direction == HistoryPage::DIR_PREV )
+ list($dirs, $oper) = array("ASC", ">=");
+ else /* $direction == HistoryPage::DIR_NEXT */
+ list($dirs, $oper) = array("DESC", "<=");
+
+ if( $offset )
+ $offsets = array("rev_timestamp $oper '$offset'");
+ else
+ $offsets = array();
+
+ $page_id = $this->title->getArticleID();
+
+ return $dbr->select( 'revision',
+ Revision::selectFields(),
+ array_merge(array("rev_page=$page_id"), $offsets),
+ __METHOD__,
+ array( 'ORDER BY' => "rev_timestamp $dirs",
+ 'USE INDEX' => 'page_timestamp', 'LIMIT' => $limit)
+ );
+ }
+
+ /**
+ * Output a subscription feed listing recent edits to this page.
+ *
+ * @param $type String: feed type
+ */
+ function feed( $type ) {
+ global $wgFeedClasses, $wgRequest, $wgFeedLimit;
+ if( !FeedUtils::checkFeedOutput($type) ) {
+ return;
+ }
+
+ $feed = new $wgFeedClasses[$type](
+ $this->title->getPrefixedText() . ' - ' .
+ wfMsgForContent( 'history-feed-title' ),
+ wfMsgForContent( 'history-feed-description' ),
+ $this->title->getFullUrl( 'action=history' )
+ );
+
+ // Get a limit on number of feed entries. Provide a sane default
+ // of 10 if none is defined (but limit to $wgFeedLimit max)
+ $limit = $wgRequest->getInt( 'limit', 10 );
+ if( $limit > $wgFeedLimit || $limit < 1 ) {
+ $limit = 10;
+ }
+ $items = $this->fetchRevisions($limit, 0, HistoryPage::DIR_NEXT);
+
+ $feed->outHeader();
+ if( $items ) {
+ foreach( $items as $row ) {
+ $feed->outItem( $this->feedItem( $row ) );
+ }
+ } else {
+ $feed->outItem( $this->feedEmpty() );
+ }
+ $feed->outFooter();
+ }
+
+ function feedEmpty() {
+ global $wgOut;
+ return new FeedItem(
+ wfMsgForContent( 'nohistory' ),
+ $wgOut->parse( wfMsgForContent( 'history-feed-empty' ) ),
+ $this->title->getFullUrl(),
+ wfTimestamp( TS_MW ),
+ '',
+ $this->title->getTalkPage()->getFullUrl()
+ );
+ }
+
+ /**
+ * Generate a FeedItem object from a given revision table row
+ * Borrows Recent Changes' feed generation functions for formatting;
+ * includes a diff to the previous revision (if any).
+ *
+ * @param $row Object: database row
+ * @return FeedItem
+ */
+ function feedItem( $row ) {
+ $rev = new Revision( $row );
+ $rev->setTitle( $this->title );
+ $text = FeedUtils::formatDiffRow(
+ $this->title,
+ $this->title->getPreviousRevisionID( $rev->getId() ),
+ $rev->getId(),
+ $rev->getTimestamp(),
+ $rev->getComment()
+ );
+ if( $rev->getComment() == '' ) {
+ global $wgContLang;
+ $title = wfMsgForContent( 'history-feed-item-nocomment',
+ $rev->getUserText(),
+ $wgContLang->timeanddate( $rev->getTimestamp() ),
+ $wgContLang->date( $rev->getTimestamp() ),
+ $wgContLang->time( $rev->getTimestamp() )
+ );
+ } else {
+ $title = $rev->getUserText() .
+ wfMsgForContent( 'colon-separator' ) .
+ FeedItem::stripComment( $rev->getComment() );
+ }
+ return new FeedItem(
+ $title,
+ $text,
+ $this->title->getFullUrl( 'diff=' . $rev->getId() . '&oldid=prev' ),
+ $rev->getTimestamp(),
+ $rev->getUserText(),
+ $this->title->getTalkPage()->getFullUrl()
+ );
+ }
+}
+
+/**
+ * @ingroup Pager
+ */
+class HistoryPager extends ReverseChronologicalPager {
+ public $lastRow = false, $counter, $historyPage, $title, $buttons, $conds;
+ protected $oldIdChecked;
+
+ function __construct( $historyPage, $year='', $month='', $tagFilter = '', $conds = array() ) {
+ parent::__construct();
+ $this->historyPage = $historyPage;
+ $this->title = $this->historyPage->title;
+ $this->tagFilter = $tagFilter;
+ $this->getDateCond( $year, $month );
+ $this->conds = $conds;
+ }
+
+ // For hook compatibility...
+ function getArticle() {
+ return $this->historyPage->getArticle();
+ }
+
+ function getSqlComment() {
+ if ( $this->conds ) {
+ return 'history page filtered'; // potentially slow, see CR r58153
+ } else {
+ return 'history page unfiltered';
+ }
+ }
+
+ function getQueryInfo() {
+ $queryInfo = array(
+ 'tables' => array('revision'),
+ 'fields' => Revision::selectFields(),
+ 'conds' => array_merge(
+ array( 'rev_page' => $this->historyPage->title->getArticleID() ),
+ $this->conds ),
+ 'options' => array( 'USE INDEX' => array('revision' => 'page_timestamp') ),
+ 'join_conds' => array( 'tag_summary' => array( 'LEFT JOIN', 'ts_rev_id=rev_id' ) ),
+ );
+ ChangeTags::modifyDisplayQuery(
+ $queryInfo['tables'],
+ $queryInfo['fields'],
+ $queryInfo['conds'],
+ $queryInfo['join_conds'],
+ $queryInfo['options'],
+ $this->tagFilter
+ );
+ wfRunHooks( 'PageHistoryPager::getQueryInfo', array( &$this, &$queryInfo ) );
+ return $queryInfo;
+ }
+
+ function getIndexField() {
+ return 'rev_timestamp';
+ }
+
+ function formatRow( $row ) {
+ if( $this->lastRow ) {
+ $latest = ($this->counter == 1 && $this->mIsFirst);
+ $firstInList = $this->counter == 1;
+ $s = $this->historyLine( $this->lastRow, $row, $this->counter++,
+ $this->title->getNotificationTimestamp(), $latest, $firstInList );
+ } else {
+ $s = '';
+ }
+ $this->lastRow = $row;
+ return $s;
+ }
+
+ /**
+ * Creates begin of history list with a submit button
+ *
+ * @return string HTML output
+ */
+ function getStartBody() {
+ global $wgScript, $wgUser, $wgOut, $wgContLang;
+ $this->lastRow = false;
+ $this->counter = 1;
+ $this->oldIdChecked = 0;
+
+ $wgOut->wrapWikiMsg( "<div class='mw-history-legend'>\n$1</div>", 'histlegend' );
+ $s = Xml::openElement( 'form', array( 'action' => $wgScript,
+ 'id' => 'mw-history-compare' ) ) . "\n";
+ $s .= Xml::hidden( 'title', $this->title->getPrefixedDbKey() ) . "\n";
+ $s .= Xml::hidden( 'action', 'historysubmit' ) . "\n";
+
+ $this->buttons = '<div>';
+ if( $wgUser->isAllowed('deleterevision') ) {
+ $float = $wgContLang->alignEnd();
+ # Note bug #20966, <button> is non-standard in IE<8
+ $this->buttons .= Xml::element( 'button',
+ array(
+ 'type' => 'submit',
+ 'name' => 'revisiondelete',
+ 'value' => '1',
+ 'style' => "float: $float;",
+ 'class' => 'mw-history-revisiondelete-button',
+ ),
+ wfMsg( 'showhideselectedversions' )
+ ) . "\n";
+ }
+ $this->buttons .= $this->submitButton( wfMsg( 'compareselectedversions'),
+ array(
+ 'class' => 'historysubmit',
+ 'accesskey' => wfMsg( 'accesskey-compareselectedversions' ),
+ 'title' => wfMsg( 'tooltip-compareselectedversions' ),
+ )
+ ) . "\n";
+ $this->buttons .= '</div>';
+ $s .= $this->buttons . '<ul id="pagehistory">' . "\n";
+ return $s;
+ }
+
+ function getEndBody() {
+ if( $this->lastRow ) {
+ $latest = $this->counter == 1 && $this->mIsFirst;
+ $firstInList = $this->counter == 1;
+ if( $this->mIsBackwards ) {
+ # Next row is unknown, but for UI reasons, probably exists if an offset has been specified
+ if( $this->mOffset == '' ) {
+ $next = null;
+ } else {
+ $next = 'unknown';
+ }
+ } else {
+ # The next row is the past-the-end row
+ $next = $this->mPastTheEndRow;
+ }
+ $s = $this->historyLine( $this->lastRow, $next, $this->counter++,
+ $this->title->getNotificationTimestamp(), $latest, $firstInList );
+ } else {
+ $s = '';
+ }
+ $s .= "</ul>\n";
+ # Add second buttons only if there is more than one rev
+ if( $this->getNumRows() > 2 ) {
+ $s .= $this->buttons;
+ }
+ $s .= '</form>';
+ return $s;
+ }
+
+ /**
+ * Creates a submit button
+ *
+ * @param $message String: text of the submit button, will be escaped
+ * @param $attributes Array: attributes
+ * @return String: HTML output for the submit button
+ */
+ function submitButton( $message, $attributes = array() ) {
+ # Disable submit button if history has 1 revision only
+ if( $this->getNumRows() > 1 ) {
+ return Xml::submitButton( $message , $attributes );
+ } else {
+ return '';
+ }
+ }
+
+ /**
+ * Returns a row from the history printout.
+ *
+ * @todo document some more, and maybe clean up the code (some params redundant?)
+ *
+ * @param $row Object: the database row corresponding to the previous line.
+ * @param $next Mixed: the database row corresponding to the next line.
+ * @param $counter Integer: apparently a counter of what row number we're at, counted from the top row = 1.
+ * @param $notificationtimestamp
+ * @param $latest Boolean: whether this row corresponds to the page's latest revision.
+ * @param $firstInList Boolean: whether this row corresponds to the first displayed on this history page.
+ * @return String: HTML output for the row
+ */
+ function historyLine( $row, $next, $counter = '', $notificationtimestamp = false,
+ $latest = false, $firstInList = false )
+ {
+ global $wgUser, $wgLang;
+ $rev = new Revision( $row );
+ $rev->setTitle( $this->title );
+
+ $curlink = $this->curLink( $rev, $latest );
+ $lastlink = $this->lastLink( $rev, $next, $counter );
+ $diffButtons = $this->diffButtons( $rev, $firstInList, $counter );
+ $histLinks = Html::rawElement(
+ 'span',
+ array( 'class' => 'mw-history-histlinks' ),
+ '(' . $curlink . $this->historyPage->message['pipe-separator'] . $lastlink . ') '
+ );
+ $s = $histLinks . $diffButtons;
+
+ $link = $this->revLink( $rev );
+ $classes = array();
+
+ $del = '';
+ // User can delete revisions...
+ if( $wgUser->isAllowed( 'deleterevision' ) ) {
+ // If revision was hidden from sysops, disable the checkbox
+ if( !$rev->userCan( Revision::DELETED_RESTRICTED ) ) {
+ $del = Xml::check( 'deleterevisions', false, array( 'disabled' => 'disabled' ) );
+ // Otherwise, enable the checkbox...
+ } else {
+ $del = Xml::check( 'showhiderevisions', false,
+ array( 'name' => 'ids['.$rev->getId().']' ) );
+ }
+ // User can only view deleted revisions...
+ } else if( $rev->getVisibility() && $wgUser->isAllowed( 'deletedhistory' ) ) {
+ // If revision was hidden from sysops, disable the link
+ if( !$rev->userCan( Revision::DELETED_RESTRICTED ) ) {
+ $cdel = $this->getSkin()->revDeleteLinkDisabled( false );
+ // Otherwise, show the link...
+ } else {
+ $query = array( 'type' => 'revision',
+ 'target' => $this->title->getPrefixedDbkey(), 'ids' => $rev->getId() );
+ $del .= $this->getSkin()->revDeleteLink( $query,
+ $rev->isDeleted( Revision::DELETED_RESTRICTED ), false );
+ }
+ }
+ if( $del ) $s .= " $del ";
+
+ $s .= " $link";
+ $s .= " <span class='history-user'>" .
+ $this->getSkin()->revUserTools( $rev, true ) . "</span>";
+
+ if( $rev->isMinor() ) {
+ $s .= ' ' . ChangesList::flag( 'minor' );
+ }
+
+ if( !is_null( $size = $rev->getSize() ) && !$rev->isDeleted( Revision::DELETED_TEXT ) ) {
+ $s .= ' ' . $this->getSkin()->formatRevisionSize( $size );
+ }
+
+ $s .= $this->getSkin()->revComment( $rev, false, true );
+
+ if( $notificationtimestamp && ($row->rev_timestamp >= $notificationtimestamp) ) {
+ $s .= ' <span class="updatedmarker">' . wfMsgHtml( 'updatedmarker' ) . '</span>';
+ }
+
+ $tools = array();
+
+ # Rollback and undo links
+ if( !is_null( $next ) && is_object( $next ) ) {
+ if( $latest && $this->title->userCan( 'rollback' ) && $this->title->userCan( 'edit' ) ) {
+ $tools[] = '<span class="mw-rollback-link">'.
+ $this->getSkin()->buildRollbackLink( $rev ).'</span>';
+ }
+
+ if( $this->title->quickUserCan( 'edit' )
+ && !$rev->isDeleted( Revision::DELETED_TEXT )
+ && !$next->rev_deleted & Revision::DELETED_TEXT )
+ {
+ # Create undo tooltip for the first (=latest) line only
+ $undoTooltip = $latest
+ ? array( 'title' => wfMsg( 'tooltip-undo' ) )
+ : array();
+ $undolink = $this->getSkin()->link(
+ $this->title,
+ wfMsgHtml( 'editundo' ),
+ $undoTooltip,
+ array(
+ 'action' => 'edit',
+ 'undoafter' => $next->rev_id,
+ 'undo' => $rev->getId()
+ ),
+ array( 'known', 'noclasses' )
+ );
+ $tools[] = "<span class=\"mw-history-undo\">{$undolink}</span>";
+ }
+ }
+
+ if( $tools ) {
+ $s .= ' (' . $wgLang->pipeList( $tools ) . ')';
+ }
+
+ # Tags
+ list($tagSummary, $newClasses) = ChangeTags::formatSummaryRow( $row->ts_tags, 'history' );
+ $classes = array_merge( $classes, $newClasses );
+ $s .= " $tagSummary";
+
+ wfRunHooks( 'PageHistoryLineEnding', array( $this, &$row , &$s, &$classes ) );
+
+ $attribs = array();
+ if ( $classes ) {
+ $attribs['class'] = implode( ' ', $classes );
+ }
+
+ return Xml::tags( 'li', $attribs, $s ) . "\n";
+ }
+
+ /**
+ * Create a link to view this revision of the page
+ *
+ * @param $rev Revision
+ * @return String
+ */
+ function revLink( $rev ) {
+ global $wgLang;
+ $date = $wgLang->timeanddate( wfTimestamp(TS_MW, $rev->getTimestamp()), true );
+ $date = htmlspecialchars( $date );
+ if( !$rev->isDeleted( Revision::DELETED_TEXT ) ) {
+ $link = $this->getSkin()->link(
+ $this->title,
+ $date,
+ array(),
+ array( 'oldid' => $rev->getId() ),
+ array( 'known', 'noclasses' )
+ );
+ } else {
+ $link = "<span class=\"history-deleted\">$date</span>";
+ }
+ return $link;
+ }
+
+ /**
+ * Create a diff-to-current link for this revision for this page
+ *
+ * @param $rev Revision
+ * @param $latest Boolean: this is the latest revision of the page?
+ * @return String
+ */
+ function curLink( $rev, $latest ) {
+ $cur = $this->historyPage->message['cur'];
+ if( $latest || !$rev->userCan( Revision::DELETED_TEXT ) ) {
+ return $cur;
+ } else {
+ return $this->getSkin()->link(
+ $this->title,
+ $cur,
+ array(),
+ array(
+ 'diff' => $this->title->getLatestRevID(),
+ 'oldid' => $rev->getId()
+ ),
+ array( 'known', 'noclasses' )
+ );
+ }
+ }
+
+ /**
+ * Create a diff-to-previous link for this revision for this page.
+ *
+ * @param $prevRev Revision: the previous revision
+ * @param $next Mixed: the newer revision
+ * @param $counter Integer: what row on the history list this is
+ * @return String
+ */
+ function lastLink( $prevRev, $next, $counter ) {
+ $last = $this->historyPage->message['last'];
+ # $next may either be a Row, null, or "unkown"
+ $nextRev = is_object($next) ? new Revision( $next ) : $next;
+ if( is_null($next) ) {
+ # Probably no next row
+ return $last;
+ } elseif( $next === 'unknown' ) {
+ # Next row probably exists but is unknown, use an oldid=prev link
+ return $this->getSkin()->link(
+ $this->title,
+ $last,
+ array(),
+ array(
+ 'diff' => $prevRev->getId(),
+ 'oldid' => 'prev'
+ ),
+ array( 'known', 'noclasses' )
+ );
+ } elseif( !$prevRev->userCan(Revision::DELETED_TEXT)
+ || !$nextRev->userCan(Revision::DELETED_TEXT) )
+ {
+ return $last;
+ } else {
+ return $this->getSkin()->link(
+ $this->title,
+ $last,
+ array(),
+ array(
+ 'diff' => $prevRev->getId(),
+ 'oldid' => $next->rev_id
+ ),
+ array( 'known', 'noclasses' )
+ );
+ }
+ }
+
+ /**
+ * Create radio buttons for page history
+ *
+ * @param $rev Revision object
+ * @param $firstInList Boolean: is this version the first one?
+ * @param $counter Integer: a counter of what row number we're at, counted from the top row = 1.
+ * @return String: HTML output for the radio buttons
+ */
+ function diffButtons( $rev, $firstInList, $counter ) {
+ if( $this->getNumRows() > 1 ) {
+ $id = $rev->getId();
+ $radio = array( 'type' => 'radio', 'value' => $id );
+ /** @todo: move title texts to javascript */
+ if( $firstInList ) {
+ $first = Xml::element( 'input',
+ array_merge( $radio, array(
+ 'style' => 'visibility:hidden',
+ 'name' => 'oldid',
+ 'id' => 'mw-oldid-null' ) )
+ );
+ $checkmark = array( 'checked' => 'checked' );
+ } else {
+ # Check visibility of old revisions
+ if( !$rev->userCan( Revision::DELETED_TEXT ) ) {
+ $radio['disabled'] = 'disabled';
+ $checkmark = array(); // We will check the next possible one
+ } else if( $counter == 2 || !$this->oldIdChecked ) {
+ $checkmark = array( 'checked' => 'checked' );
+ $this->oldIdChecked = $id;
+ } else {
+ $checkmark = array();
+ }
+ $first = Xml::element( 'input',
+ array_merge( $radio, $checkmark, array(
+ 'name' => 'oldid',
+ 'id' => "mw-oldid-$id" ) ) );
+ $checkmark = array();
+ }
+ $second = Xml::element( 'input',
+ array_merge( $radio, $checkmark, array(
+ 'name' => 'diff',
+ 'id' => "mw-diff-$id" ) ) );
+ return $first . $second;
+ } else {
+ return '';
+ }
+ }
+}
+
+/**
+ * Backwards-compatibility aliases
+ */
+class PageHistory extends HistoryPage {}
+class PageHistoryPager extends HistoryPager {}
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