5 * Split off from Article.php and Skin.php, 2003-12-22
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 * http://www.gnu.org/copyleft/gpl.html
26 use MediaWiki\MediaWikiServices
;
27 use Wikimedia\Rdbms\ResultWrapper
;
28 use Wikimedia\Rdbms\FakeResultWrapper
;
31 * This class handles printing the history page for an article. In order to
32 * be efficient, it uses timestamps rather than offsets for paging, to avoid
33 * costly LIMIT,offset queries.
35 * Construct it by passing in an Article, and call $h->history() to print the
40 class HistoryAction
extends FormlessAction
{
44 /** @var array Array of message keys and strings */
47 public function getName() {
51 public function requiresWrite() {
55 public function requiresUnblock() {
59 protected function getPageTitle() {
60 return $this->msg( 'history-title', $this->getTitle()->getPrefixedText() )->text();
63 protected function getDescription() {
64 // Creation of a subtitle link pointing to [[Special:Log]]
65 return MediaWikiServices
::getInstance()->getLinkRenderer()->makeKnownLink(
66 SpecialPage
::getTitleFor( 'Log' ),
67 $this->msg( 'viewpagelogs' )->text(),
69 [ 'page' => $this->getTitle()->getPrefixedText() ]
74 * @return WikiPage|Article|ImagePage|CategoryPage|Page The Article object we are working on.
76 public function getArticle() {
81 * As we use the same small set of messages in various methods and that
82 * they are called often, we call them once and save them in $this->message
84 private function preCacheMessages() {
85 // Precache various messages
86 if ( !isset( $this->message
) ) {
87 $msgs = [ 'cur', 'last', 'pipe-separator' ];
88 foreach ( $msgs as $msg ) {
89 $this->message
[$msg] = $this->msg( $msg )->escaped();
95 * Print the history page for an article.
98 $out = $this->getOutput();
99 $request = $this->getRequest();
102 * Allow client caching.
104 if ( $out->checkLastModified( $this->page
->getTouched() ) ) {
105 return; // Client cache fresh and headers sent, nothing more to do.
108 $this->preCacheMessages();
109 $config = $this->context
->getConfig();
111 # Fill in the file cache if not set already
112 if ( HTMLFileCache
::useFileCache( $this->getContext() ) ) {
113 $cache = new HTMLFileCache( $this->getTitle(), 'history' );
114 if ( !$cache->isCacheGood( /* Assume up to date */ ) ) {
115 ob_start( [ &$cache, 'saveToFileCache' ] );
119 // Setup page variables.
120 $out->setFeedAppendQuery( 'action=history' );
121 $out->addModules( 'mediawiki.action.history' );
122 $out->addModuleStyles( [
123 'mediawiki.action.history.styles',
124 'mediawiki.special.changeslist',
126 if ( $config->get( 'UseMediaWikiUIEverywhere' ) ) {
127 $out = $this->getOutput();
128 $out->addModuleStyles( [
129 'mediawiki.ui.input',
130 'mediawiki.ui.checkbox',
134 // Handle atom/RSS feeds.
135 $feedType = $request->getVal( 'feed' );
137 $this->feed( $feedType );
142 $this->addHelpLink( '//meta.wikimedia.org/wiki/Special:MyLanguage/Help:Page_history', true );
144 // Fail nicely if article doesn't exist.
145 if ( !$this->page
->exists() ) {
146 global $wgSend404Code;
147 if ( $wgSend404Code ) {
148 $out->setStatusCode( 404 );
150 $out->addWikiMsg( 'nohistory' );
152 $dbr = wfGetDB( DB_REPLICA
);
154 # show deletion/move log if there is an entry
155 LogEventsList
::showLogExtract(
157 [ 'delete', 'move', 'protect' ],
161 'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
162 'showIfEmpty' => false,
163 'msgKey' => [ 'moveddeleted-notice' ]
171 * Add date selector to quickly get to a certain time
173 $year = $request->getInt( 'year' );
174 $month = $request->getInt( 'month' );
175 $tagFilter = $request->getVal( 'tagfilter' );
176 $tagSelector = ChangeTags
::buildTagFilterSelector( $tagFilter, false, $this->getContext() );
179 * Option to show only revisions that have been (partially) hidden via RevisionDelete
181 if ( $request->getBool( 'deleted' ) ) {
182 $conds = [ 'rev_deleted != 0' ];
186 if ( $this->getUser()->isAllowed( 'deletedhistory' ) ) {
187 $checkDeleted = Xml
::checkLabel( $this->msg( 'history-show-deleted' )->text(),
188 'deleted', 'mw-show-deleted-only', $request->getBool( 'deleted' ) ) . "\n";
193 // Add the general form
194 $action = htmlspecialchars( wfScript() );
195 $content = Html
::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) . "\n";
196 $content .= Html
::hidden( 'action', 'history' ) . "\n";
197 $content .= Xml
::dateMenu(
198 ( $year == null ? MWTimestamp
::getLocalInstance()->format( 'Y' ) : $year ),
201 $content .= $tagSelector ?
( implode( ' ', $tagSelector ) . ' ' ) : '';
202 $content .= $checkDeleted . Html
::submitButton(
203 $this->msg( 'historyaction-submit' )->text(),
205 [ 'mw-ui-progressive' ]
208 "<form action=\"$action\" method=\"get\" id=\"mw-history-searchform\">" .
210 $this->msg( 'history-fieldset-title' )->text(),
212 [ 'id' => 'mw-history-search' ]
217 Hooks
::run( 'PageHistoryBeforeList', [ &$this->page
, $this->getContext() ] );
219 // Create and output the list.
220 $pager = new HistoryPager( $this, $year, $month, $tagFilter, $conds );
222 $pager->getNavigationBar() .
224 $pager->getNavigationBar()
226 $out->preventClickjacking( $pager->getPreventClickjacking() );
230 * Fetch an array of revisions, specified by a given limit, offset and
231 * direction. This is now only used by the feeds. It was previously
232 * used by the main UI but that's now handled by the pager.
234 * @param int $limit The limit number of revisions to get
236 * @param int $direction Either self::DIR_PREV or self::DIR_NEXT
237 * @return ResultWrapper
239 function fetchRevisions( $limit, $offset, $direction ) {
240 // Fail if article doesn't exist.
241 if ( !$this->getTitle()->exists() ) {
242 return new FakeResultWrapper( [] );
245 $dbr = wfGetDB( DB_REPLICA
);
247 if ( $direction === self
::DIR_PREV
) {
248 list( $dirs, $oper ) = [ "ASC", ">=" ];
249 } else { /* $direction === self::DIR_NEXT */
250 list( $dirs, $oper ) = [ "DESC", "<=" ];
254 $offsets = [ "rev_timestamp $oper " . $dbr->addQuotes( $dbr->timestamp( $offset ) ) ];
259 $page_id = $this->page
->getId();
261 $revQuery = Revision
::getQueryInfo();
265 array_merge( [ 'rev_page' => $page_id ], $offsets ),
268 'ORDER BY' => "rev_timestamp $dirs",
269 'USE INDEX' => [ 'revision' => 'page_timestamp' ],
277 * Output a subscription feed listing recent edits to this page.
279 * @param string $type Feed type
281 function feed( $type ) {
282 if ( !FeedUtils
::checkFeedOutput( $type ) ) {
285 $request = $this->getRequest();
287 $feedClasses = $this->context
->getConfig()->get( 'FeedClasses' );
288 /** @var RSSFeed|AtomFeed $feed */
289 $feed = new $feedClasses[$type](
290 $this->getTitle()->getPrefixedText() . ' - ' .
291 $this->msg( 'history-feed-title' )->inContentLanguage()->text(),
292 $this->msg( 'history-feed-description' )->inContentLanguage()->text(),
293 $this->getTitle()->getFullURL( 'action=history' )
296 // Get a limit on number of feed entries. Provide a sane default
297 // of 10 if none is defined (but limit to $wgFeedLimit max)
298 $limit = $request->getInt( 'limit', 10 );
301 $this->context
->getConfig()->get( 'FeedLimit' )
304 $items = $this->fetchRevisions( $limit, 0, self
::DIR_NEXT
);
306 // Generate feed elements enclosed between header and footer.
308 if ( $items->numRows() ) {
309 foreach ( $items as $row ) {
310 $feed->outItem( $this->feedItem( $row ) );
313 $feed->outItem( $this->feedEmpty() );
318 function feedEmpty() {
320 $this->msg( 'nohistory' )->inContentLanguage()->text(),
321 $this->msg( 'history-feed-empty' )->inContentLanguage()->parseAsBlock(),
322 $this->getTitle()->getFullURL(),
323 wfTimestamp( TS_MW
),
325 $this->getTitle()->getTalkPage()->getFullURL()
330 * Generate a FeedItem object from a given revision table row
331 * Borrows Recent Changes' feed generation functions for formatting;
332 * includes a diff to the previous revision (if any).
334 * @param stdClass|array $row Database row
337 function feedItem( $row ) {
338 $rev = new Revision( $row );
339 $rev->setTitle( $this->getTitle() );
340 $text = FeedUtils
::formatDiffRow(
342 $this->getTitle()->getPreviousRevisionID( $rev->getId() ),
344 $rev->getTimestamp(),
347 if ( $rev->getComment() == '' ) {
349 $title = $this->msg( 'history-feed-item-nocomment',
351 $wgContLang->timeanddate( $rev->getTimestamp() ),
352 $wgContLang->date( $rev->getTimestamp() ),
353 $wgContLang->time( $rev->getTimestamp() ) )->inContentLanguage()->text();
355 $title = $rev->getUserText() .
356 $this->msg( 'colon-separator' )->inContentLanguage()->text() .
357 FeedItem
::stripComment( $rev->getComment() );
363 $this->getTitle()->getFullURL( 'diff=' . $rev->getId() . '&oldid=prev' ),
364 $rev->getTimestamp(),
366 $this->getTitle()->getTalkPage()->getFullURL()
375 class HistoryPager
extends ReverseChronologicalPager
{
379 public $lastRow = false;
381 public $counter, $historyPage, $buttons, $conds;
383 protected $oldIdChecked;
385 protected $preventClickjacking = false;
389 protected $parentLens;
391 /** @var bool Whether to show the tag editing UI */
392 protected $showTagEditUI;
398 * @param HistoryAction $historyPage
399 * @param string $year
400 * @param string $month
401 * @param string $tagFilter
402 * @param array $conds
404 function __construct( $historyPage, $year = '', $month = '', $tagFilter = '', $conds = [] ) {
405 parent
::__construct( $historyPage->getContext() );
406 $this->historyPage
= $historyPage;
407 $this->tagFilter
= $tagFilter;
408 $this->getDateCond( $year, $month );
409 $this->conds
= $conds;
410 $this->showTagEditUI
= ChangeTags
::showTagEditingUI( $this->getUser() );
413 // For hook compatibility...
414 function getArticle() {
415 return $this->historyPage
->getArticle();
418 function getSqlComment() {
419 if ( $this->conds
) {
420 return 'history page filtered'; // potentially slow, see CR r58153
422 return 'history page unfiltered';
426 function getQueryInfo() {
427 $revQuery = Revision
::getQueryInfo( [ 'user' ] );
429 'tables' => $revQuery['tables'],
430 'fields' => $revQuery['fields'],
431 'conds' => array_merge(
432 [ 'rev_page' => $this->getWikiPage()->getId() ],
434 'options' => [ 'USE INDEX' => [ 'revision' => 'page_timestamp' ] ],
435 'join_conds' => $revQuery['joins'],
437 ChangeTags
::modifyDisplayQuery(
438 $queryInfo['tables'],
439 $queryInfo['fields'],
441 $queryInfo['join_conds'],
442 $queryInfo['options'],
446 // Avoid PHP 7.1 warning of passing $this by reference
447 $historyPager = $this;
448 Hooks
::run( 'PageHistoryPager::getQueryInfo', [ &$historyPager, &$queryInfo ] );
453 function getIndexField() {
454 return 'rev_timestamp';
458 * @param stdClass $row
461 function formatRow( $row ) {
462 if ( $this->lastRow
) {
463 $latest = ( $this->counter
== 1 && $this->mIsFirst
);
464 $firstInList = $this->counter
== 1;
467 $notifTimestamp = $this->getConfig()->get( 'ShowUpdatedMarker' )
468 ?
$this->getTitle()->getNotificationTimestamp( $this->getUser() )
471 $s = $this->historyLine(
472 $this->lastRow
, $row, $notifTimestamp, $latest, $firstInList );
476 $this->lastRow
= $row;
481 function doBatchLookups() {
482 if ( !Hooks
::run( 'PageHistoryPager::doBatchLookups', [ $this, $this->mResult
] ) ) {
486 # Do a link batch query
487 $this->mResult
->seek( 0 );
488 $batch = new LinkBatch();
490 foreach ( $this->mResult
as $row ) {
491 if ( $row->rev_parent_id
) {
492 $revIds[] = $row->rev_parent_id
;
494 if ( !is_null( $row->user_name
) ) {
495 $batch->add( NS_USER
, $row->user_name
);
496 $batch->add( NS_USER_TALK
, $row->user_name
);
497 } else { # for anons or usernames of imported revisions
498 $batch->add( NS_USER
, $row->rev_user_text
);
499 $batch->add( NS_USER_TALK
, $row->rev_user_text
);
502 $this->parentLens
= Revision
::getParentLengths( $this->mDb
, $revIds );
504 $this->mResult
->seek( 0 );
508 * Creates begin of history list with a submit button
510 * @return string HTML output
512 function getStartBody() {
513 $this->lastRow
= false;
515 $this->oldIdChecked
= 0;
517 $this->getOutput()->wrapWikiMsg( "<div class='mw-history-legend'>\n$1\n</div>", 'histlegend' );
518 $s = Html
::openElement( 'form', [ 'action' => wfScript(),
519 'id' => 'mw-history-compare' ] ) . "\n";
520 $s .= Html
::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) . "\n";
521 $s .= Html
::hidden( 'action', 'historysubmit' ) . "\n";
522 $s .= Html
::hidden( 'type', 'revision' ) . "\n";
524 // Button container stored in $this->buttons for re-use in getEndBody()
525 $this->buttons
= '<div>';
526 $className = 'historysubmit mw-history-compareselectedversions-button';
527 $attrs = [ 'class' => $className ]
528 + Linker
::tooltipAndAccesskeyAttribs( 'compareselectedversions' );
529 $this->buttons
.= $this->submitButton( $this->msg( 'compareselectedversions' )->text(),
533 $user = $this->getUser();
535 if ( $user->isAllowed( 'deleterevision' ) ) {
536 $actionButtons .= $this->getRevisionButton( 'revisiondelete', 'showhideselectedversions' );
538 if ( $this->showTagEditUI
) {
539 $actionButtons .= $this->getRevisionButton( 'editchangetags', 'history-edit-tags' );
541 if ( $actionButtons ) {
542 $this->buttons
.= Xml
::tags( 'div', [ 'class' =>
543 'mw-history-revisionactions' ], $actionButtons );
546 if ( $user->isAllowed( 'deleterevision' ) ||
$this->showTagEditUI
) {
547 $this->buttons
.= ( new ListToggle( $this->getOutput() ) )->getHTML();
550 $this->buttons
.= '</div>';
552 $s .= $this->buttons
;
553 $s .= '<ul id="pagehistory">' . "\n";
558 private function getRevisionButton( $name, $msg ) {
559 $this->preventClickjacking();
560 # Note bug #20966, <button> is non-standard in IE<8
561 $element = Html
::element(
567 'class' => "historysubmit mw-history-$name-button",
569 $this->msg( $msg )->text()
574 function getEndBody() {
575 if ( $this->lastRow
) {
576 $latest = $this->counter
== 1 && $this->mIsFirst
;
577 $firstInList = $this->counter
== 1;
578 if ( $this->mIsBackwards
) {
579 # Next row is unknown, but for UI reasons, probably exists if an offset has been specified
580 if ( $this->mOffset
== '' ) {
586 # The next row is the past-the-end row
587 $next = $this->mPastTheEndRow
;
591 $notifTimestamp = $this->getConfig()->get( 'ShowUpdatedMarker' )
592 ?
$this->getTitle()->getNotificationTimestamp( $this->getUser() )
595 $s = $this->historyLine(
596 $this->lastRow
, $next, $notifTimestamp, $latest, $firstInList );
601 # Add second buttons only if there is more than one rev
602 if ( $this->getNumRows() > 2 ) {
603 $s .= $this->buttons
;
611 * Creates a submit button
613 * @param string $message Text of the submit button, will be escaped
614 * @param array $attributes Attributes
615 * @return string HTML output for the submit button
617 function submitButton( $message, $attributes = [] ) {
618 # Disable submit button if history has 1 revision only
619 if ( $this->getNumRows() > 1 ) {
620 return Html
::submitButton( $message, $attributes );
627 * Returns a row from the history printout.
629 * @todo document some more, and maybe clean up the code (some params redundant?)
631 * @param stdClass $row The database row corresponding to the previous line.
632 * @param mixed $next The database row corresponding to the next line
633 * (chronologically previous)
634 * @param bool|string $notificationtimestamp
635 * @param bool $latest Whether this row corresponds to the page's latest revision.
636 * @param bool $firstInList Whether this row corresponds to the first
637 * displayed on this history page.
638 * @return string HTML output for the row
640 function historyLine( $row, $next, $notificationtimestamp = false,
641 $latest = false, $firstInList = false ) {
642 $rev = new Revision( $row );
643 $rev->setTitle( $this->getTitle() );
645 if ( is_object( $next ) ) {
646 $prevRev = new Revision( $next );
647 $prevRev->setTitle( $this->getTitle() );
652 $curlink = $this->curLink( $rev, $latest );
653 $lastlink = $this->lastLink( $rev, $next );
654 $curLastlinks = $curlink . $this->historyPage
->message
['pipe-separator'] . $lastlink;
655 $histLinks = Html
::rawElement(
657 [ 'class' => 'mw-history-histlinks' ],
658 $this->msg( 'parentheses' )->rawParams( $curLastlinks )->escaped()
661 $diffButtons = $this->diffButtons( $rev, $firstInList );
662 $s = $histLinks . $diffButtons;
664 $link = $this->revLink( $rev );
668 $user = $this->getUser();
669 $canRevDelete = $user->isAllowed( 'deleterevision' );
670 // Show checkboxes for each revision, to allow for revision deletion and
672 if ( $canRevDelete ||
$this->showTagEditUI
) {
673 $this->preventClickjacking();
674 // If revision was hidden from sysops and we don't need the checkbox
675 // for anything else, disable it
676 if ( !$this->showTagEditUI
&& !$rev->userCan( Revision
::DELETED_RESTRICTED
, $user ) ) {
677 $del = Xml
::check( 'deleterevisions', false, [ 'disabled' => 'disabled' ] );
678 // Otherwise, enable the checkbox...
680 $del = Xml
::check( 'showhiderevisions', false,
681 [ 'name' => 'ids[' . $rev->getId() . ']' ] );
683 // User can only view deleted revisions...
684 } elseif ( $rev->getVisibility() && $user->isAllowed( 'deletedhistory' ) ) {
685 // If revision was hidden from sysops, disable the link
686 if ( !$rev->userCan( Revision
::DELETED_RESTRICTED
, $user ) ) {
687 $del = Linker
::revDeleteLinkDisabled( false );
688 // Otherwise, show the link...
690 $query = [ 'type' => 'revision',
691 'target' => $this->getTitle()->getPrefixedDBkey(), 'ids' => $rev->getId() ];
692 $del .= Linker
::revDeleteLink( $query,
693 $rev->isDeleted( Revision
::DELETED_RESTRICTED
), false );
700 $lang = $this->getLanguage();
701 $dirmark = $lang->getDirMark();
705 $s .= " <span class='history-user'>" .
706 Linker
::revUserTools( $rev, true ) . "</span>";
709 if ( $rev->isMinor() ) {
710 $s .= ' ' . ChangesList
::flag( 'minor', $this->getContext() );
713 # Sometimes rev_len isn't populated
714 if ( $rev->getSize() !== null ) {
715 # Size is always public data
716 $prevSize = isset( $this->parentLens
[$row->rev_parent_id
] )
717 ?
$this->parentLens
[$row->rev_parent_id
]
719 $sDiff = ChangesList
::showCharacterDifference( $prevSize, $rev->getSize() );
720 $fSize = Linker
::formatRevisionSize( $rev->getSize() );
721 $s .= ' <span class="mw-changeslist-separator">. .</span> ' . "$fSize $sDiff";
724 # Text following the character difference is added just before running hooks
725 $s2 = Linker
::revComment( $rev, false, true );
727 if ( $notificationtimestamp && ( $row->rev_timestamp
>= $notificationtimestamp ) ) {
728 $s2 .= ' <span class="updatedmarker">' . $this->msg( 'updatedmarker' )->escaped() . '</span>';
729 $classes[] = 'mw-history-line-updated';
734 # Rollback and undo links
735 if ( $prevRev && $this->getTitle()->quickUserCan( 'edit', $user ) ) {
736 if ( $latest && $this->getTitle()->quickUserCan( 'rollback', $user ) ) {
737 // Get a rollback link without the brackets
738 $rollbackLink = Linker
::generateRollback(
741 [ 'verify', 'noBrackets' ]
743 if ( $rollbackLink ) {
744 $this->preventClickjacking();
745 $tools[] = $rollbackLink;
749 if ( !$rev->isDeleted( Revision
::DELETED_TEXT
)
750 && !$prevRev->isDeleted( Revision
::DELETED_TEXT
)
752 # Create undo tooltip for the first (=latest) line only
753 $undoTooltip = $latest
754 ?
[ 'title' => $this->msg( 'tooltip-undo' )->text() ]
756 $undolink = MediaWikiServices
::getInstance()->getLinkRenderer()->makeKnownLink(
758 $this->msg( 'editundo' )->text(),
762 'undoafter' => $prevRev->getId(),
763 'undo' => $rev->getId()
766 $tools[] = "<span class=\"mw-history-undo\">{$undolink}</span>";
769 // Allow extension to add their own links here
770 Hooks
::run( 'HistoryRevisionTools', [ $rev, &$tools, $prevRev, $user ] );
773 $s2 .= ' ' . $this->msg( 'parentheses' )->rawParams( $lang->pipeList( $tools ) )->escaped();
777 list( $tagSummary, $newClasses ) = ChangeTags
::formatSummaryRow(
782 $classes = array_merge( $classes, $newClasses );
783 if ( $tagSummary !== '' ) {
784 $s2 .= " $tagSummary";
787 # Include separator between character difference and following text
789 $s .= ' <span class="mw-changeslist-separator">. .</span> ' . $s2;
792 $attribs = [ 'data-mw-revid' => $rev->getId() ];
794 Hooks
::run( 'PageHistoryLineEnding', [ $this, &$row, &$s, &$classes, &$attribs ] );
795 $attribs = wfArrayFilterByKey( $attribs, [ Sanitizer
::class, 'isReservedDataAttribute' ] );
798 $attribs['class'] = implode( ' ', $classes );
801 return Xml
::tags( 'li', $attribs, $s ) . "\n";
805 * Create a link to view this revision of the page
807 * @param Revision $rev
810 function revLink( $rev ) {
811 $date = $this->getLanguage()->userTimeAndDate( $rev->getTimestamp(), $this->getUser() );
812 if ( $rev->userCan( Revision
::DELETED_TEXT
, $this->getUser() ) ) {
813 $link = MediaWikiServices
::getInstance()->getLinkRenderer()->makeKnownLink(
816 [ 'class' => 'mw-changeslist-date' ],
817 [ 'oldid' => $rev->getId() ]
820 $link = htmlspecialchars( $date );
822 if ( $rev->isDeleted( Revision
::DELETED_TEXT
) ) {
823 $link = "<span class=\"history-deleted\">$link</span>";
830 * Create a diff-to-current link for this revision for this page
832 * @param Revision $rev
833 * @param bool $latest This is the latest revision of the page?
836 function curLink( $rev, $latest ) {
837 $cur = $this->historyPage
->message
['cur'];
838 if ( $latest ||
!$rev->userCan( Revision
::DELETED_TEXT
, $this->getUser() ) ) {
841 return MediaWikiServices
::getInstance()->getLinkRenderer()->makeKnownLink(
846 'diff' => $this->getWikiPage()->getLatest(),
847 'oldid' => $rev->getId()
854 * Create a diff-to-previous link for this revision for this page.
856 * @param Revision $prevRev The revision being displayed
857 * @param stdClass|string|null $next The next revision in list (that is
858 * the previous one in chronological order).
859 * May either be a row, "unknown" or null.
862 function lastLink( $prevRev, $next ) {
863 $last = $this->historyPage
->message
['last'];
865 if ( $next === null ) {
866 # Probably no next row
870 $linkRenderer = MediaWikiServices
::getInstance()->getLinkRenderer();
871 if ( $next === 'unknown' ) {
872 # Next row probably exists but is unknown, use an oldid=prev link
873 return $linkRenderer->makeKnownLink(
878 'diff' => $prevRev->getId(),
884 $nextRev = new Revision( $next );
886 if ( !$prevRev->userCan( Revision
::DELETED_TEXT
, $this->getUser() )
887 ||
!$nextRev->userCan( Revision
::DELETED_TEXT
, $this->getUser() )
892 return $linkRenderer->makeKnownLink(
897 'diff' => $prevRev->getId(),
898 'oldid' => $next->rev_id
904 * Create radio buttons for page history
906 * @param Revision $rev
907 * @param bool $firstInList Is this version the first one?
909 * @return string HTML output for the radio buttons
911 function diffButtons( $rev, $firstInList ) {
912 if ( $this->getNumRows() > 1 ) {
914 $radio = [ 'type' => 'radio', 'value' => $id ];
915 /** @todo Move title texts to javascript */
916 if ( $firstInList ) {
917 $first = Xml
::element( 'input',
918 array_merge( $radio, [
919 'style' => 'visibility:hidden',
921 'id' => 'mw-oldid-null' ] )
923 $checkmark = [ 'checked' => 'checked' ];
925 # Check visibility of old revisions
926 if ( !$rev->userCan( Revision
::DELETED_TEXT
, $this->getUser() ) ) {
927 $radio['disabled'] = 'disabled';
928 $checkmark = []; // We will check the next possible one
929 } elseif ( !$this->oldIdChecked
) {
930 $checkmark = [ 'checked' => 'checked' ];
931 $this->oldIdChecked
= $id;
935 $first = Xml
::element( 'input',
936 array_merge( $radio, $checkmark, [
938 'id' => "mw-oldid-$id" ] ) );
941 $second = Xml
::element( 'input',
942 array_merge( $radio, $checkmark, [
944 'id' => "mw-diff-$id" ] ) );
946 return $first . $second;
953 * This is called if a write operation is possible from the generated HTML
954 * @param bool $enable
956 function preventClickjacking( $enable = true ) {
957 $this->preventClickjacking
= $enable;
961 * Get the "prevent clickjacking" flag
964 function getPreventClickjacking() {
965 return $this->preventClickjacking
;