]> scripts.mit.edu Git - autoinstallsdev/mediawiki.git/blobdiff - includes/specials/SpecialWhatlinkshere.php
MediaWiki 1.30.2
[autoinstallsdev/mediawiki.git] / includes / specials / SpecialWhatlinkshere.php
index 360f3f6891abdd64ec392d252c7b0afcfe397c0a..6f91c46f86168356c55f195a8df68437cee2757e 100644 (file)
  * @todo Use some variant of Pager or something; the pagination here is lousy.
  */
 
+use Wikimedia\Rdbms\IDatabase;
+
 /**
  * Implements Special:Whatlinkshere
  *
  * @ingroup SpecialPage
  */
-class SpecialWhatLinksHere extends SpecialPage {
+class SpecialWhatLinksHere extends IncludableSpecialPage {
+       /** @var FormOptions */
+       protected $opts;
 
-       // Stored objects
-       protected $opts, $target, $selfTitle;
+       protected $selfTitle;
 
-       // Stored globals
-       protected $skin;
+       /** @var Title */
+       protected $target;
 
-       protected $limits = array( 20, 50, 100, 250, 500 );
+       protected $limits = [ 20, 50, 100, 250, 500 ];
 
        public function __construct() {
                parent::__construct( 'Whatlinkshere' );
-               global $wgUser;
-               $this->skin = $wgUser->getSkin();
        }
 
        function execute( $par ) {
-               global $wgOut, $wgRequest;
+               $out = $this->getOutput();
 
                $this->setHeaders();
+               $this->outputHeader();
+               $this->addHelpLink( 'Help:What links here' );
 
                $opts = new FormOptions();
 
                $opts->add( 'target', '' );
                $opts->add( 'namespace', '', FormOptions::INTNULL );
-               $opts->add( 'limit', 50 );
+               $opts->add( 'limit', $this->getConfig()->get( 'QueryPageDefaultLimit' ) );
                $opts->add( 'from', 0 );
                $opts->add( 'back', 0 );
                $opts->add( 'hideredirs', false );
                $opts->add( 'hidetrans', false );
                $opts->add( 'hidelinks', false );
                $opts->add( 'hideimages', false );
+               $opts->add( 'invert', false );
 
-               $opts->fetchValuesFromRequest( $wgRequest );
+               $opts->fetchValuesFromRequest( $this->getRequest() );
                $opts->validateIntBounds( 'limit', 0, 5000 );
 
                // Give precedence to subpage syntax
-               if ( isset($par) ) {
+               if ( $par !== null ) {
                        $opts->setValue( 'target', $par );
                }
 
                // Bind to member variable
                $this->opts = $opts;
 
-               $this->target = Title::newFromURL( $opts->getValue( 'target' ) );
-               if( !$this->target ) {
-                       $wgOut->addHTML( $this->whatlinkshereForm() );
+               $this->target = Title::newFromText( $opts->getValue( 'target' ) );
+               if ( !$this->target ) {
+                       if ( !$this->including() ) {
+                               $out->addHTML( $this->whatlinkshereForm() );
+                       }
+
                        return;
                }
 
-               $this->selfTitle = $this->getTitle( $this->target->getPrefixedDBkey() );
+               $this->getSkin()->setRelevantTitle( $this->target );
 
-               $wgOut->setPageTitle( wfMsg( 'whatlinkshere-title', $this->target->getPrefixedText() ) );
-               $wgOut->setSubtitle( wfMsg( 'whatlinkshere-backlink', $this->skin->link( $this->target, $this->target->getPrefixedText(), array(), array( 'redirect' => 'no'  ) ) ) );
+               $this->selfTitle = $this->getPageTitle( $this->target->getPrefixedDBkey() );
 
-               $this->showIndirectLinks( 0, $this->target, $opts->getValue( 'limit' ),
-                       $opts->getValue( 'from' ), $opts->getValue( 'back' ) );
+               $out->setPageTitle( $this->msg( 'whatlinkshere-title', $this->target->getPrefixedText() ) );
+               $out->addBacklinkSubtitle( $this->target );
+               $this->showIndirectLinks(
+                       0,
+                       $this->target,
+                       $opts->getValue( 'limit' ),
+                       $opts->getValue( 'from' ),
+                       $opts->getValue( 'back' )
+               );
        }
 
        /**
-        * @param $level  int     Recursion level
-        * @param $target Title   Target title
-        * @param $limit  int     Number of entries to display
-        * @param $from   Title   Display from this article ID
-        * @param $back   Title   Display from this article ID at backwards scrolling
-        * @private
+        * @param int $level Recursion level
+        * @param Title $target Target title
+        * @param int $limit Number of entries to display
+        * @param int $from Display from this article ID (default: 0)
+        * @param int $back Display from this article ID at backwards scrolling (default: 0)
         */
        function showIndirectLinks( $level, $target, $limit, $from = 0, $back = 0 ) {
-               global $wgOut, $wgMaxRedirectLinksRetrieved;
-               $dbr = wfGetDB( DB_SLAVE );
-               $options = array();
+               $out = $this->getOutput();
+               $dbr = wfGetDB( DB_REPLICA );
 
                $hidelinks = $this->opts->getValue( 'hidelinks' );
                $hideredirs = $this->opts->getValue( 'hideredirs' );
                $hidetrans = $this->opts->getValue( 'hidetrans' );
                $hideimages = $target->getNamespace() != NS_FILE || $this->opts->getValue( 'hideimages' );
 
-               $fetchlinks = (!$hidelinks || !$hideredirs);
+               $fetchlinks = ( !$hidelinks || !$hideredirs );
 
-               // Make the query
-               $plConds = array(
-                       'page_id=pl_from',
+               // Build query conds in concert for all three tables...
+               $conds['pagelinks'] = [
                        'pl_namespace' => $target->getNamespace(),
                        'pl_title' => $target->getDBkey(),
-               );
-               if( $hideredirs ) {
-                       $plConds['page_is_redirect'] = 0;
-               } elseif( $hidelinks ) {
-                       $plConds['page_is_redirect'] = 1;
-               }
-
-               $tlConds = array(
-                       'page_id=tl_from',
+               ];
+               $conds['templatelinks'] = [
                        'tl_namespace' => $target->getNamespace(),
                        'tl_title' => $target->getDBkey(),
-               );
-
-               $ilConds = array(
-                       'page_id=il_from',
+               ];
+               $conds['imagelinks'] = [
                        'il_to' => $target->getDBkey(),
-               );
+               ];
 
                $namespace = $this->opts->getValue( 'namespace' );
-               if ( is_int($namespace) ) {
-                       $plConds['page_namespace'] = $namespace;
-                       $tlConds['page_namespace'] = $namespace;
-                       $ilConds['page_namespace'] = $namespace;
+               $invert = $this->opts->getValue( 'invert' );
+               $nsComparison = ( $invert ? '!= ' : '= ' ) . $dbr->addQuotes( $namespace );
+               if ( is_int( $namespace ) ) {
+                       $conds['pagelinks'][] = "pl_from_namespace $nsComparison";
+                       $conds['templatelinks'][] = "tl_from_namespace $nsComparison";
+                       $conds['imagelinks'][] = "il_from_namespace $nsComparison";
                }
 
                if ( $from ) {
-                       $tlConds[] = "tl_from >= $from";
-                       $plConds[] = "pl_from >= $from";
-                       $ilConds[] = "il_from >= $from";
+                       $conds['templatelinks'][] = "tl_from >= $from";
+                       $conds['pagelinks'][] = "pl_from >= $from";
+                       $conds['imagelinks'][] = "il_from >= $from";
                }
 
-               // Read an extra row as an at-end check
-               $queryLimit = $limit + 1;
-
-               // Enforce join order, sometimes namespace selector may
-               // trigger filesorts which are far less efficient than scanning many entries
-               $options[] = 'STRAIGHT_JOIN';
-
-               $options['LIMIT'] = $queryLimit;
-               $fields = array( 'page_id', 'page_namespace', 'page_title', 'page_is_redirect' );
+               if ( $hideredirs ) {
+                       $conds['pagelinks']['rd_from'] = null;
+               } elseif ( $hidelinks ) {
+                       $conds['pagelinks'][] = 'rd_from is NOT NULL';
+               }
 
-               if( $fetchlinks ) {
-                       $options['ORDER BY'] = 'pl_from';
-                       $plRes = $dbr->select( array( 'pagelinks', 'page' ), $fields,
-                               $plConds, __METHOD__, $options );
+               $queryFunc = function ( IDatabase $dbr, $table, $fromCol ) use (
+                       $conds, $target, $limit
+               ) {
+                       // Read an extra row as an at-end check
+                       $queryLimit = $limit + 1;
+                       $on = [
+                               "rd_from = $fromCol",
+                               'rd_title' => $target->getDBkey(),
+                               'rd_interwiki = ' . $dbr->addQuotes( '' ) . ' OR rd_interwiki IS NULL'
+                       ];
+                       $on['rd_namespace'] = $target->getNamespace();
+                       // Inner LIMIT is 2X in case of stale backlinks with wrong namespaces
+                       $subQuery = $dbr->selectSQLText(
+                               [ $table, 'redirect', 'page' ],
+                               [ $fromCol, 'rd_from' ],
+                               $conds[$table],
+                               __CLASS__ . '::showIndirectLinks',
+                               // Force JOIN order per T106682 to avoid large filesorts
+                               [ 'ORDER BY' => $fromCol, 'LIMIT' => 2 * $queryLimit, 'STRAIGHT_JOIN' ],
+                               [
+                                       'page' => [ 'INNER JOIN', "$fromCol = page_id" ],
+                                       'redirect' => [ 'LEFT JOIN', $on ]
+                               ]
+                       );
+                       return $dbr->select(
+                               [ 'page', 'temp_backlink_range' => "($subQuery)" ],
+                               [ 'page_id', 'page_namespace', 'page_title', 'rd_from', 'page_is_redirect' ],
+                               [],
+                               __CLASS__ . '::showIndirectLinks',
+                               [ 'ORDER BY' => 'page_id', 'LIMIT' => $queryLimit ],
+                               [ 'page' => [ 'INNER JOIN', "$fromCol = page_id" ] ]
+                       );
+               };
+
+               if ( $fetchlinks ) {
+                       $plRes = $queryFunc( $dbr, 'pagelinks', 'pl_from' );
                }
 
-               if( !$hidetrans ) {
-                       $options['ORDER BY'] = 'tl_from';
-                       $tlRes = $dbr->select( array( 'templatelinks', 'page' ), $fields,
-                               $tlConds, __METHOD__, $options );
+               if ( !$hidetrans ) {
+                       $tlRes = $queryFunc( $dbr, 'templatelinks', 'tl_from' );
                }
 
-               if( !$hideimages ) {
-                       $options['ORDER BY'] = 'il_from';
-                       $ilRes = $dbr->select( array( 'imagelinks', 'page' ), $fields,
-                               $ilConds, __METHOD__, $options );
+               if ( !$hideimages ) {
+                       $ilRes = $queryFunc( $dbr, 'imagelinks', 'il_from' );
                }
 
-               if( ( !$fetchlinks || !$dbr->numRows($plRes) ) && ( $hidetrans || !$dbr->numRows($tlRes) ) && ( $hideimages || !$dbr->numRows($ilRes) ) ) {
+               if ( ( !$fetchlinks || !$plRes->numRows() )
+                       && ( $hidetrans || !$tlRes->numRows() )
+                       && ( $hideimages || !$ilRes->numRows() )
+               ) {
                        if ( 0 == $level ) {
-                               $wgOut->addHTML( $this->whatlinkshereForm() );
-
-                               // Show filters only if there are links
-                               if( $hidelinks || $hidetrans || $hideredirs || $hideimages )
-                                       $wgOut->addHTML( $this->getFilterPanel() );
-
-                               $errMsg = is_int($namespace) ? 'nolinkshere-ns' : 'nolinkshere';
-                               $wgOut->addWikiMsg( $errMsg, $this->target->getPrefixedText() );
+                               if ( !$this->including() ) {
+                                       $out->addHTML( $this->whatlinkshereForm() );
+
+                                       // Show filters only if there are links
+                                       if ( $hidelinks || $hidetrans || $hideredirs || $hideimages ) {
+                                               $out->addHTML( $this->getFilterPanel() );
+                                       }
+                                       $errMsg = is_int( $namespace ) ? 'nolinkshere-ns' : 'nolinkshere';
+                                       $out->addWikiMsg( $errMsg, $this->target->getPrefixedText() );
+                                       $out->setStatusCode( 404 );
+                               }
                        }
+
                        return;
                }
 
                // Read the rows into an array and remove duplicates
                // templatelinks comes second so that the templatelinks row overwrites the
                // pagelinks row, so we get (inclusion) rather than nothing
-               if( $fetchlinks ) {
+               if ( $fetchlinks ) {
                        foreach ( $plRes as $row ) {
                                $row->is_template = 0;
                                $row->is_image = 0;
                                $rows[$row->page_id] = $row;
                        }
                }
-               if( !$hidetrans ) {
+               if ( !$hidetrans ) {
                        foreach ( $tlRes as $row ) {
                                $row->is_template = 1;
                                $row->is_image = 0;
                                $rows[$row->page_id] = $row;
                        }
                }
-               if( !$hideimages ) {
+               if ( !$hideimages ) {
                        foreach ( $ilRes as $row ) {
                                $row->is_template = 0;
                                $row->is_image = 1;
@@ -227,180 +261,258 @@ class SpecialWhatLinksHere extends SpecialPage {
                }
                $prevId = $from;
 
+               // use LinkBatch to make sure, that all required data (associated with Titles)
+               // is loaded in one query
+               $lb = new LinkBatch();
+               foreach ( $rows as $row ) {
+                       $lb->add( $row->page_namespace, $row->page_title );
+               }
+               $lb->execute();
+
                if ( $level == 0 ) {
-                       $wgOut->addHTML( $this->whatlinkshereForm() );
-                       $wgOut->addHTML( $this->getFilterPanel() );
-                       $wgOut->addWikiMsg( 'linkshere', $this->target->getPrefixedText() );
+                       if ( !$this->including() ) {
+                               $out->addHTML( $this->whatlinkshereForm() );
+                               $out->addHTML( $this->getFilterPanel() );
+                               $out->addWikiMsg( 'linkshere', $this->target->getPrefixedText() );
 
-                       $prevnext = $this->getPrevNext( $prevId, $nextId );
-                       $wgOut->addHTML( $prevnext );
+                               $prevnext = $this->getPrevNext( $prevId, $nextId );
+                               $out->addHTML( $prevnext );
+                       }
                }
-
-               $wgOut->addHTML( $this->listStart( $level ) );
+               $out->addHTML( $this->listStart( $level ) );
                foreach ( $rows as $row ) {
                        $nt = Title::makeTitle( $row->page_namespace, $row->page_title );
 
-                       if ( $row->page_is_redirect && $level < 2 ) {
-                               $wgOut->addHTML( $this->listItem( $row, $nt, true ) );
-                               $this->showIndirectLinks( $level + 1, $nt, $wgMaxRedirectLinksRetrieved );
-                               $wgOut->addHTML( Xml::closeElement( 'li' ) );
+                       if ( $row->rd_from && $level < 2 ) {
+                               $out->addHTML( $this->listItem( $row, $nt, $target, true ) );
+                               $this->showIndirectLinks(
+                                       $level + 1,
+                                       $nt,
+                                       $this->getConfig()->get( 'MaxRedirectLinksRetrieved' )
+                               );
+                               $out->addHTML( Xml::closeElement( 'li' ) );
                        } else {
-                               $wgOut->addHTML( $this->listItem( $row, $nt ) );
+                               $out->addHTML( $this->listItem( $row, $nt, $target ) );
                        }
                }
 
-               $wgOut->addHTML( $this->listEnd() );
+               $out->addHTML( $this->listEnd() );
 
-               if( $level == 0 ) {
-                       $wgOut->addHTML( $prevnext );
+               if ( $level == 0 ) {
+                       if ( !$this->including() ) {
+                               $out->addHTML( $prevnext );
+                       }
                }
        }
 
        protected function listStart( $level ) {
-               return Xml::openElement( 'ul', ( $level ? array() : array( 'id' => 'mw-whatlinkshere-list' ) ) );
+               return Xml::openElement( 'ul', ( $level ? [] : [ 'id' => 'mw-whatlinkshere-list' ] ) );
        }
 
-       protected function listItem( $row, $nt, $notClose = false ) {
+       protected function listItem( $row, $nt, $target, $notClose = false ) {
+               $dirmark = $this->getLanguage()->getDirMark();
+
                # local message cache
                static $msgcache = null;
                if ( $msgcache === null ) {
-                       static $msgs = array( 'isredirect', 'istemplate', 'semicolon-separator',
-                               'whatlinkshere-links', 'isimage' );
-                       $msgcache = array();
+                       static $msgs = [ 'isredirect', 'istemplate', 'semicolon-separator',
+                               'whatlinkshere-links', 'isimage', 'editlink' ];
+                       $msgcache = [];
                        foreach ( $msgs as $msg ) {
-                               $msgcache[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
+                               $msgcache[$msg] = $this->msg( $msg )->escaped();
                        }
                }
 
-               if( $row->page_is_redirect ) {
-                       $query = array( 'redirect' => 'no' );
+               if ( $row->rd_from ) {
+                       $query = [ 'redirect' => 'no' ];
                } else {
-                       $query = array();
+                       $query = [];
                }
 
-               $link = $this->skin->linkKnown(
+               $link = $this->getLinkRenderer()->makeKnownLink(
                        $nt,
                        null,
-                       array(),
+                       $row->page_is_redirect ? [ 'class' => 'mw-redirect' ] : [],
                        $query
                );
 
                // Display properties (redirect or template)
                $propsText = '';
-               $props = array();
-               if ( $row->page_is_redirect )
+               $props = [];
+               if ( $row->rd_from ) {
                        $props[] = $msgcache['isredirect'];
-               if ( $row->is_template )
+               }
+               if ( $row->is_template ) {
                        $props[] = $msgcache['istemplate'];
-               if( $row->is_image )
+               }
+               if ( $row->is_image ) {
                        $props[] = $msgcache['isimage'];
+               }
+
+               Hooks::run( 'WhatLinksHereProps', [ $row, $nt, $target, &$props ] );
 
                if ( count( $props ) ) {
-                       $propsText = '(' . implode( $msgcache['semicolon-separator'], $props ) . ')';
+                       $propsText = $this->msg( 'parentheses' )
+                               ->rawParams( implode( $msgcache['semicolon-separator'], $props ) )->escaped();
                }
 
                # Space for utilities links, with a what-links-here link provided
-               $wlhLink = $this->wlhLink( $nt, $msgcache['whatlinkshere-links'] );
-               $wlh = Xml::wrapClass( "($wlhLink)", 'mw-whatlinkshere-tools' );
+               $wlhLink = $this->wlhLink( $nt, $msgcache['whatlinkshere-links'], $msgcache['editlink'] );
+               $wlh = Xml::wrapClass(
+                       $this->msg( 'parentheses' )->rawParams( $wlhLink )->escaped(),
+                       'mw-whatlinkshere-tools'
+               );
 
                return $notClose ?
-                       Xml::openElement( 'li' ) . "$link $propsText $wlh\n" :
-                       Xml::tags( 'li', null, "$link $propsText $wlh" ) . "\n";
+                       Xml::openElement( 'li' ) . "$link $propsText $dirmark $wlh\n" :
+                       Xml::tags( 'li', null, "$link $propsText $dirmark $wlh" ) . "\n";
        }
 
        protected function listEnd() {
                return Xml::closeElement( 'ul' );
        }
 
-       protected function wlhLink( Title $target, $text ) {
+       protected function wlhLink( Title $target, $text, $editText ) {
                static $title = null;
-               if ( $title === null )
-                       $title = $this->getTitle();
+               if ( $title === null ) {
+                       $title = $this->getPageTitle();
+               }
 
-               return $this->skin->linkKnown(
-                       $title,
-                       $text,
-                       array(),
-                       array( 'target' => $target->getPrefixedText() )
-               );
+               $linkRenderer = $this->getLinkRenderer();
+
+               if ( $text !== null ) {
+                       $text = new HtmlArmor( $text );
+               }
+
+               // always show a "<- Links" link
+               $links = [
+                       'links' => $linkRenderer->makeKnownLink(
+                               $title,
+                               $text,
+                               [],
+                               [ 'target' => $target->getPrefixedText() ]
+                       ),
+               ];
+
+               // if the page is editable, add an edit link
+               if (
+                       // check user permissions
+                       $this->getUser()->isAllowed( 'edit' ) &&
+                       // check, if the content model is editable through action=edit
+                       ContentHandler::getForTitle( $target )->supportsDirectEditing()
+               ) {
+                       if ( $editText !== null ) {
+                               $editText = new HtmlArmor( $editText );
+                       }
+
+                       $links['edit'] = $linkRenderer->makeKnownLink(
+                               $target,
+                               $editText,
+                               [],
+                               [ 'action' => 'edit' ]
+                       );
+               }
+
+               // build the links html
+               return $this->getLanguage()->pipeList( $links );
        }
 
        function makeSelfLink( $text, $query ) {
-               return $this->skin->linkKnown(
+               if ( $text !== null ) {
+                       $text = new HtmlArmor( $text );
+               }
+
+               return $this->getLinkRenderer()->makeKnownLink(
                        $this->selfTitle,
                        $text,
-                       array(),
+                       [],
                        $query
                );
        }
 
        function getPrevNext( $prevId, $nextId ) {
-               global $wgLang;
                $currentLimit = $this->opts->getValue( 'limit' );
-               $fmtLimit = $wgLang->formatNum( $currentLimit );
-               $prev = wfMsgExt( 'whatlinkshere-prev', array( 'parsemag', 'escape' ), $fmtLimit );
-               $next = wfMsgExt( 'whatlinkshere-next', array( 'parsemag', 'escape' ), $fmtLimit );
+               $prev = $this->msg( 'whatlinkshere-prev' )->numParams( $currentLimit )->escaped();
+               $next = $this->msg( 'whatlinkshere-next' )->numParams( $currentLimit )->escaped();
 
                $changed = $this->opts->getChangedValues();
-               unset($changed['target']); // Already in the request title
+               unset( $changed['target'] ); // Already in the request title
 
                if ( 0 != $prevId ) {
-                       $overrides = array( 'from' => $this->opts->getValue( 'back' ) );
+                       $overrides = [ 'from' => $this->opts->getValue( 'back' ) ];
                        $prev = $this->makeSelfLink( $prev, array_merge( $changed, $overrides ) );
                }
                if ( 0 != $nextId ) {
-                       $overrides = array( 'from' => $nextId, 'back' => $prevId );
+                       $overrides = [ 'from' => $nextId, 'back' => $prevId ];
                        $next = $this->makeSelfLink( $next, array_merge( $changed, $overrides ) );
                }
 
-               $limitLinks = array();
+               $limitLinks = [];
+               $lang = $this->getLanguage();
                foreach ( $this->limits as $limit ) {
-                       $prettyLimit = $wgLang->formatNum( $limit );
-                       $overrides = array( 'limit' => $limit );
+                       $prettyLimit = htmlspecialchars( $lang->formatNum( $limit ) );
+                       $overrides = [ 'limit' => $limit ];
                        $limitLinks[] = $this->makeSelfLink( $prettyLimit, array_merge( $changed, $overrides ) );
                }
 
-               $nums = $wgLang->pipeList( $limitLinks );
+               $nums = $lang->pipeList( $limitLinks );
 
-               return wfMsgHtml( 'viewprevnext', $prev, $next, $nums );
+               return $this->msg( 'viewprevnext' )->rawParams( $prev, $next, $nums )->escaped();
        }
 
        function whatlinkshereForm() {
-               global $wgScript;
-
                // We get nicer value from the title object
                $this->opts->consumeValue( 'target' );
                // Reset these for new requests
-               $this->opts->consumeValues( array( 'back', 'from' ) );
+               $this->opts->consumeValues( [ 'back', 'from' ] );
 
                $target = $this->target ? $this->target->getPrefixedText() : '';
                $namespace = $this->opts->consumeValue( 'namespace' );
+               $nsinvert = $this->opts->consumeValue( 'invert' );
 
                # Build up the form
-               $f = Xml::openElement( 'form', array( 'action' => $wgScript ) );
-               
+               $f = Xml::openElement( 'form', [ 'action' => wfScript() ] );
+
                # Values that should not be forgotten
-               $f .= Html::hidden( 'title', $this->getTitle()->getPrefixedText() );
+               $f .= Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() );
                foreach ( $this->opts->getUnconsumedValues() as $name => $value ) {
                        $f .= Html::hidden( $name, $value );
                }
 
-               $f .= Xml::fieldset( wfMsg( 'whatlinkshere' ) );
+               $f .= Xml::fieldset( $this->msg( 'whatlinkshere' )->text() );
 
-               # Target input
-               $f .= Xml::inputLabel( wfMsg( 'whatlinkshere-page' ), 'target',
-                               'mw-whatlinkshere-target', 40, $target );
+               # Target input (.mw-searchInput enables suggestions)
+               $f .= Xml::inputLabel( $this->msg( 'whatlinkshere-page' )->text(), 'target',
+                       'mw-whatlinkshere-target', 40, $target, [ 'class' => 'mw-searchInput' ] );
 
                $f .= ' ';
 
                # Namespace selector
-               $f .= Xml::label( wfMsg( 'namespace' ), 'namespace' ) . '&#160;' .
-                       Xml::namespaceSelector( $namespace, '' );
+               $f .= Html::namespaceSelector(
+                       [
+                               'selected' => $namespace,
+                               'all' => '',
+                               'label' => $this->msg( 'namespace' )->text()
+                       ], [
+                               'name' => 'namespace',
+                               'id' => 'namespace',
+                               'class' => 'namespaceselector',
+                       ]
+               );
+
+               $f .= '&#160;' .
+                       Xml::checkLabel(
+                               $this->msg( 'invert' )->text(),
+                               'invert',
+                               'nsinvert',
+                               $nsinvert,
+                               [ 'title' => $this->msg( 'tooltip-whatlinkshere-invert' )->text() ]
+                       );
 
                $f .= ' ';
 
                # Submit
-               $f .= Xml::submitButton( wfMsg( 'allpagessubmit' ) );
+               $f .= Xml::submitButton( $this->msg( 'whatlinkshere-submit' )->text() );
 
                # Close
                $f .= Xml::closeElement( 'fieldset' ) . Xml::closeElement( 'form' ) . "\n";
@@ -410,30 +522,52 @@ class SpecialWhatLinksHere extends SpecialPage {
 
        /**
         * Create filter panel
-        * 
+        *
         * @return string HTML fieldset and filter panel with the show/hide links
         */
        function getFilterPanel() {
-               global $wgLang;
-               $show = wfMsgHtml( 'show' );
-               $hide = wfMsgHtml( 'hide' );
+               $show = $this->msg( 'show' )->escaped();
+               $hide = $this->msg( 'hide' )->escaped();
 
                $changed = $this->opts->getChangedValues();
-               unset($changed['target']); // Already in the request title
+               unset( $changed['target'] ); // Already in the request title
 
-               $links = array();
-               $types = array( 'hidetrans', 'hidelinks', 'hideredirs' );
-               if( $this->target->getNamespace() == NS_FILE )
+               $links = [];
+               $types = [ 'hidetrans', 'hidelinks', 'hideredirs' ];
+               if ( $this->target->getNamespace() == NS_FILE ) {
                        $types[] = 'hideimages';
+               }
 
-               // Combined message keys: 'whatlinkshere-hideredirs', 'whatlinkshere-hidetrans', 'whatlinkshere-hidelinks', 'whatlinkshere-hideimages'
-               // To be sure they will be find by grep
-               foreach( $types as $type ) {
+               // Combined message keys: 'whatlinkshere-hideredirs', 'whatlinkshere-hidetrans',
+               // 'whatlinkshere-hidelinks', 'whatlinkshere-hideimages'
+               // To be sure they will be found by grep
+               foreach ( $types as $type ) {
                        $chosen = $this->opts->getValue( $type );
                        $msg = $chosen ? $show : $hide;
-                       $overrides = array( $type => !$chosen );
-                       $links[] =  wfMsgHtml( "whatlinkshere-{$type}", $this->makeSelfLink( $msg, array_merge( $changed, $overrides ) ) );
+                       $overrides = [ $type => !$chosen ];
+                       $links[] = $this->msg( "whatlinkshere-{$type}" )->rawParams(
+                               $this->makeSelfLink( $msg, array_merge( $changed, $overrides ) ) )->escaped();
                }
-               return Xml::fieldset( wfMsg( 'whatlinkshere-filters' ), $wgLang->pipeList( $links ) );
+
+               return Xml::fieldset(
+                       $this->msg( 'whatlinkshere-filters' )->text(),
+                       $this->getLanguage()->pipeList( $links )
+               );
+       }
+
+       /**
+        * Return an array of subpages beginning with $search that this special page will accept.
+        *
+        * @param string $search Prefix to search for
+        * @param int $limit Maximum number of results to return (usually 10)
+        * @param int $offset Number of results to skip (usually 0)
+        * @return string[] Matching subpages
+        */
+       public function prefixSearchSubpages( $search, $limit, $offset ) {
+               return $this->prefixSearchString( $search, $limit, $offset );
+       }
+
+       protected function getGroupName() {
+               return 'pagetools';
        }
 }