Merge branch 'master' into Wikidata
[lhc/web/wiklou.git] / includes / specials / SpecialUndelete.php
index 15a77c3..47e88d0 100644 (file)
@@ -116,7 +116,8 @@ class PageArchive {
                $res = $dbr->select( 'archive',
                        array(
                                'ar_minor_edit', 'ar_timestamp', 'ar_user', 'ar_user_text',
-                               'ar_comment', 'ar_len', 'ar_deleted', 'ar_rev_id'
+                               'ar_comment', 'ar_len', 'ar_deleted', 'ar_rev_id', 'ar_sha1',
+                'ar_content_format', 'ar_content_model'
                        ),
                        array( 'ar_namespace' => $this->title->getNamespace(),
                                   'ar_title' => $this->title->getDBkey() ),
@@ -187,13 +188,17 @@ class PageArchive {
                                'ar_flags',
                                'ar_text_id',
                                'ar_deleted',
-                               'ar_len' ),
+                               'ar_len',
+                               'ar_sha1',
+                'ar_content_format',
+                'ar_content_model',
+                       ),
                        array( 'ar_namespace' => $this->title->getNamespace(),
-                                  'ar_title' => $this->title->getDBkey(),
-                                  'ar_timestamp' => $dbr->timestamp( $timestamp ) ),
+                                       'ar_title' => $this->title->getDBkey(),
+                                       'ar_timestamp' => $dbr->timestamp( $timestamp ) ),
                        __METHOD__ );
                if( $row ) {
-                       return Revision::newFromArchiveRow( $row, array( 'page' => $this->title->getArticleId() ) );
+                       return Revision::newFromArchiveRow( $row, array( 'page' => $this->title->getArticleID() ) );
                } else {
                        return null;
                }
@@ -398,14 +403,17 @@ class PageArchive {
                $dbw = wfGetDB( DB_MASTER );
 
                # Does this page already exist? We'll have to update it...
-               $article = new Article( $this->title );
-               $options = 'FOR UPDATE'; // lock page
+               $article = WikiPage::factory( $this->title );
+               # Load latest data for the current page (bug 31179)
+               $article->loadPageData( 'fromdbmaster' );
+               $oldcountable = $article->isCountable();
+
                $page = $dbw->selectRow( 'page',
                        array( 'page_id', 'page_latest' ),
                        array( 'page_namespace' => $this->title->getNamespace(),
                                   'page_title'     => $this->title->getDBkey() ),
                        __METHOD__,
-                       $options
+                       array( 'FOR UPDATE' ) // lock page
                );
                if( $page ) {
                        $makepage = false;
@@ -456,7 +464,10 @@ class PageArchive {
                                'ar_text_id',
                                'ar_deleted',
                                'ar_page_id',
-                               'ar_len' ),
+                               'ar_len',
+                               'ar_sha1',
+                'ar_content_format',
+                'ar_content_model' ),
                        /* WHERE */ array(
                                'ar_namespace' => $this->title->getNamespace(),
                                'ar_title'     => $this->title->getDBkey(),
@@ -532,7 +543,6 @@ class PageArchive {
                }
 
                $created = (bool)$newid;
-               $oldcountable = $article->isCountable();
 
                // Attach the latest revision to the page...
                $wasnew = $article->updateIfNewerOn( $dbw, $revision, $previousRevId );
@@ -566,49 +576,54 @@ class PageArchive {
  */
 class SpecialUndelete extends SpecialPage {
        var $mAction, $mTarget, $mTimestamp, $mRestore, $mInvert, $mFilename;
-       var $mTargetTimestamp, $mAllowed, $mCanView, $mComment, $mToken, $mRequest;
+       var $mTargetTimestamp, $mAllowed, $mCanView, $mComment, $mToken;
 
        /**
         * @var Title
         */
        var $mTargetObj;
 
-       function __construct( $request = null ) {
+       function __construct() {
                parent::__construct( 'Undelete', 'deletedhistory' );
+       }
 
-               if ( $request === null ) {
-                       global $wgRequest;
-                       $this->mRequest = $wgRequest;
+       function loadRequest( $par ) {
+               $request = $this->getRequest();
+               $user = $this->getUser();
+
+               $this->mAction = $request->getVal( 'action' );
+               if ( $par !== null && $par !== '' ) {
+                       $this->mTarget = $par;
                } else {
-                       $this->mRequest = $request;
+                       $this->mTarget = $request->getVal( 'target' );
                }
-       }
-
-       function loadRequest() {
-               global $wgUser;
-               $this->mAction = $this->mRequest->getVal( 'action' );
-               $this->mTarget = $this->mRequest->getVal( 'target' );
-               $this->mSearchPrefix = $this->mRequest->getText( 'prefix' );
-               $time = $this->mRequest->getVal( 'timestamp' );
+               $this->mTargetObj = null;
+               if ( $this->mTarget !== null && $this->mTarget !== '' ) {
+                       $this->mTargetObj = Title::newFromURL( $this->mTarget );
+               }
+               $this->mSearchPrefix = $request->getText( 'prefix' );
+               $time = $request->getVal( 'timestamp' );
                $this->mTimestamp = $time ? wfTimestamp( TS_MW, $time ) : '';
-               $this->mFilename = $this->mRequest->getVal( 'file' );
-
-               $posted = $this->mRequest->wasPosted() &&
-                       $wgUser->matchEditToken( $this->mRequest->getVal( 'wpEditToken' ) );
-               $this->mRestore = $this->mRequest->getCheck( 'restore' ) && $posted;
-               $this->mInvert = $this->mRequest->getCheck( 'invert' ) && $posted;
-               $this->mPreview = $this->mRequest->getCheck( 'preview' ) && $posted;
-               $this->mDiff = $this->mRequest->getCheck( 'diff' );
-               $this->mComment = $this->mRequest->getText( 'wpComment' );
-               $this->mUnsuppress = $this->mRequest->getVal( 'wpUnsuppress' ) && $wgUser->isAllowed( 'suppressrevision' );
-               $this->mToken = $this->mRequest->getVal( 'token' );
-
-               if ( $wgUser->isAllowed( 'undelete' ) && !$wgUser->isBlocked() ) {
+               $this->mFilename = $request->getVal( 'file' );
+
+               $posted = $request->wasPosted() &&
+                       $user->matchEditToken( $request->getVal( 'wpEditToken' ) );
+               $this->mRestore = $request->getCheck( 'restore' ) && $posted;
+               $this->mInvert = $request->getCheck( 'invert' ) && $posted;
+               $this->mPreview = $request->getCheck( 'preview' ) && $posted;
+               $this->mDiff = $request->getCheck( 'diff' );
+               $this->mDiffOnly = $request->getBool( 'diffonly', $this->getUser()->getOption( 'diffonly' ) );
+               $this->mComment = $request->getText( 'wpComment' );
+               $this->mUnsuppress = $request->getVal( 'wpUnsuppress' ) && $user->isAllowed( 'suppressrevision' );
+               $this->mToken = $request->getVal( 'token' );
+
+               if ( $user->isAllowed( 'undelete' ) && !$user->isBlocked() ) {
                        $this->mAllowed = true; // user can restore
                        $this->mCanView = true; // user can view content
-               } elseif ( $wgUser->isAllowed( 'deletedtext' ) ) {
+               } elseif ( $user->isAllowed( 'deletedtext' ) ) {
                        $this->mAllowed = false; // user cannot restore
                        $this->mCanView = true; // user can view content
+                       $this->mRestore = false;
                } else { // user can only view the list of revisions
                        $this->mAllowed = false;
                        $this->mCanView = false;
@@ -619,7 +634,7 @@ class SpecialUndelete extends SpecialPage {
                if( $this->mRestore || $this->mInvert ) {
                        $timestamps = array();
                        $this->mFileVersions = array();
-                       foreach( $this->mRequest->getValues() as $key => $val ) {
+                       foreach( $request->getValues() as $key => $val ) {
                                $matches = array();
                                if( preg_match( '/^ts(\d{14})$/', $key, $matches ) ) {
                                        array_push( $timestamps, $matches[1] );
@@ -635,103 +650,84 @@ class SpecialUndelete extends SpecialPage {
        }
 
        function execute( $par ) {
-               global $wgOut, $wgUser;
+               $this->checkPermissions();
+               $user = $this->getUser();
 
                $this->setHeaders();
-               if ( !$this->userCanExecute( $wgUser ) ) {
-                       $this->displayRestrictionError();
-                       return;
-               }
                $this->outputHeader();
 
-               $this->loadRequest();
+               $this->loadRequest( $par );
 
-               if ( $this->mAllowed ) {
-                       $wgOut->setPageTitle( wfMsg( 'undeletepage' ) );
-               } else {
-                       $wgOut->setPageTitle( wfMsg( 'viewdeletedpage' ) );
-               }
+               $out = $this->getOutput();
 
-               if( $par != '' ) {
-                       $this->mTarget = $par;
-               }
-               if ( $this->mTarget !== '' ) {
-                       $this->mTargetObj = Title::newFromURL( $this->mTarget );
-                       $this->getSkin()->setRelevantTitle( $this->mTargetObj );
-               } else {
-                       $this->mTargetObj = null;
-               }
+               if ( is_null( $this->mTargetObj ) ) {
+                       $out->addWikiMsg( 'undelete-header' );
 
-               if( is_null( $this->mTargetObj ) ) {
                        # Not all users can just browse every deleted page from the list
-                       if( $wgUser->isAllowed( 'browsearchive' ) ) {
+                       if ( $user->isAllowed( 'browsearchive' ) ) {
                                $this->showSearchForm();
-
-                               # List undeletable articles
-                               if( $this->mSearchPrefix ) {
-                                       $result = PageArchive::listPagesByPrefix( $this->mSearchPrefix );
-                                       $this->showList( $result );
-                               }
-                       } else {
-                               $wgOut->addWikiMsg( 'undelete-header' );
                        }
                        return;
                }
-               if( $this->mTimestamp !== '' ) {
-                       return $this->showRevision( $this->mTimestamp );
+
+               if ( $this->mAllowed ) {
+                       $out->setPageTitle( $this->msg( 'undeletepage' ) );
+               } else {
+                       $out->setPageTitle( $this->msg( 'viewdeletedpage' ) );
                }
-               if( $this->mFilename !== null ) {
+
+               $this->getSkin()->setRelevantTitle( $this->mTargetObj );
+
+               if ( $this->mTimestamp !== '' ) {
+                       $this->showRevision( $this->mTimestamp );
+               } elseif ( $this->mFilename !== null ) {
                        $file = new ArchivedFile( $this->mTargetObj, '', $this->mFilename );
                        // Check if user is allowed to see this file
                        if ( !$file->exists() ) {
-                               $wgOut->addWikiMsg( 'filedelete-nofile', $this->mFilename );
-                               return;
-                       } elseif( !$file->userCan( File::DELETED_FILE ) ) {
+                               $out->addWikiMsg( 'filedelete-nofile', $this->mFilename );
+                       } elseif ( !$file->userCan( File::DELETED_FILE, $user ) ) {
                                if( $file->isDeleted( File::DELETED_RESTRICTED ) ) {
-                                       $wgOut->permissionRequired( 'suppressrevision' );
+                                       throw new PermissionsError( 'suppressrevision' );
                                } else {
-                                       $wgOut->permissionRequired( 'deletedtext' );
+                                       throw new PermissionsError( 'deletedtext' );
                                }
-                               return false;
-                       } elseif ( !$wgUser->matchEditToken( $this->mToken, $this->mFilename ) ) {
+                       } elseif ( !$user->matchEditToken( $this->mToken, $this->mFilename ) ) {
                                $this->showFileConfirmationForm( $this->mFilename );
-                               return false;
                        } else {
-                               return $this->showFile( $this->mFilename );
+                               $this->showFile( $this->mFilename );
                        }
+               } elseif ( $this->mRestore && $this->mAction == 'submit' ) {
+                       $this->undelete();
+               } else {
+                       $this->showHistory();
                }
-               if( $this->mRestore && $this->mAction == 'submit' ) {
-                       global $wgUploadMaintenance;
-                       if( $wgUploadMaintenance && $this->mTargetObj && $this->mTargetObj->getNamespace() == NS_FILE ) {
-                               $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n", array( 'filedelete-maintenance' ) );
-                               return;
-                       }
-                       return $this->undelete();
-               }
-               if( $this->mInvert && $this->mAction == 'submit' ) {
-                       return $this->showHistory();
-               }
-               return $this->showHistory();
        }
 
        function showSearchForm() {
-               global $wgOut, $wgScript;
-               $wgOut->addWikiMsg( 'undelete-header' );
+               global $wgScript;
 
-               $wgOut->addHTML(
+               $out = $this->getOutput();
+               $out->setPageTitle( $this->msg( 'undelete-search-title' ) );
+               $out->addHTML(
                        Xml::openElement( 'form', array(
                                'method' => 'get',
                                'action' => $wgScript ) ) .
-                       Xml::fieldset( wfMsg( 'undelete-search-box' ) ) .
+                       Xml::fieldset( $this->msg( 'undelete-search-box' )->text() ) .
                        Html::hidden( 'title',
                                $this->getTitle()->getPrefixedDbKey() ) .
-                       Xml::inputLabel( wfMsg( 'undelete-search-prefix' ),
+                       Xml::inputLabel( $this->msg( 'undelete-search-prefix' )->text(),
                                'prefix', 'prefix', 20,
                                $this->mSearchPrefix ) . ' ' .
-                       Xml::submitButton( wfMsg( 'undelete-search-submit' ) ) .
+                       Xml::submitButton( $this->msg( 'undelete-search-submit' )->text() ) .
                        Xml::closeElement( 'fieldset' ) .
                        Xml::closeElement( 'form' )
                );
+
+               # List undeletable articles
+               if( $this->mSearchPrefix ) {
+                       $result = PageArchive::listPagesByPrefix( $this->mSearchPrefix );
+                       $this->showList( $result );
+               }
        }
 
        /**
@@ -741,42 +737,41 @@ class SpecialUndelete extends SpecialPage {
         * @return bool
         */
        private function showList( $result ) {
-               global $wgLang, $wgOut;
+               $out = $this->getOutput();
 
                if( $result->numRows() == 0 ) {
-                       $wgOut->addWikiMsg( 'undelete-no-results' );
+                       $out->addWikiMsg( 'undelete-no-results' );
                        return;
                }
 
-               $wgOut->addWikiMsg( 'undeletepagetext', $wgLang->formatNum( $result->numRows() ) );
+               $out->addWikiMsg( 'undeletepagetext', $this->getLanguage()->formatNum( $result->numRows() ) );
 
-               $sk = $this->getSkin();
                $undelete = $this->getTitle();
-               $wgOut->addHTML( "<ul>\n" );
+               $out->addHTML( "<ul>\n" );
                foreach ( $result as $row ) {
                        $title = Title::makeTitleSafe( $row->ar_namespace, $row->ar_title );
-                       $link = $sk->linkKnown(
-                               $undelete,
-                               htmlspecialchars( $title->getPrefixedText() ),
-                               array(),
-                               array( 'target' => $title->getPrefixedText() )
-                       );
-                       $revs = wfMsgExt( 'undeleterevisions',
-                               array( 'parseinline' ),
-                               $wgLang->formatNum( $row->count ) );
-                       $wgOut->addHTML( "<li>{$link} ({$revs})</li>\n" );
+                       if ( $title !== null ) {
+                               $item = Linker::linkKnown(
+                                       $undelete,
+                                       htmlspecialchars( $title->getPrefixedText() ),
+                                       array(),
+                                       array( 'target' => $title->getPrefixedText() )
+                               );
+                       } else {
+                               // The title is no longer valid, show as text
+                               $title = Title::makeTitle( $row->ar_namespace, $row->ar_title );
+                               $item = htmlspecialchars( $title->getPrefixedText() );
+                       }
+                       $revs = $this->msg( 'undeleterevisions' )->numParams( $row->count )->parse();
+                       $out->addHTML( "<li>{$item} ({$revs})</li>\n" );
                }
                $result->free();
-               $wgOut->addHTML( "</ul>\n" );
+               $out->addHTML( "</ul>\n" );
 
                return true;
        }
 
        private function showRevision( $timestamp ) {
-               global $wgLang, $wgUser, $wgOut;
-
-               $skin = $this->getSkin();
-
                if( !preg_match( '/[0-9]{14}/', $timestamp ) ) {
                        return 0;
                }
@@ -785,83 +780,86 @@ class SpecialUndelete extends SpecialPage {
                wfRunHooks( 'UndeleteForm::showRevision', array( &$archive, $this->mTargetObj ) );
                $rev = $archive->getRevision( $timestamp );
 
+               $out = $this->getOutput();
+               $user = $this->getUser();
+
                if( !$rev ) {
-                       $wgOut->addWikiMsg( 'undeleterevision-missing' );
+                       $out->addWikiMsg( 'undeleterevision-missing' );
                        return;
                }
 
                if( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
-                       if( !$rev->userCan( Revision::DELETED_TEXT ) ) {
-                               $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
+                       if( !$rev->userCan( Revision::DELETED_TEXT, $user ) ) {
+                               $out->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
                                return;
                        } else {
-                               $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
-                               $wgOut->addHTML( '<br />' );
+                               $out->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
+                               $out->addHTML( '<br />' );
                                // and we are allowed to see...
                        }
                }
 
-               $wgOut->setPageTitle( wfMsg( 'undeletepage' ) );
-
-               $link = $skin->linkKnown(
-                       $this->getTitle( $this->mTargetObj->getPrefixedDBkey() ),
-                       htmlspecialchars( $this->mTargetObj->getPrefixedText() )
-               );
-
                if( $this->mDiff ) {
                        $previousRev = $archive->getPreviousRevision( $timestamp );
                        if( $previousRev ) {
                                $this->showDiff( $previousRev, $rev );
-                               if( $wgUser->getOption( 'diffonly' ) ) {
+                               if( $this->mDiffOnly ) {
                                        return;
                                } else {
-                                       $wgOut->addHTML( '<hr />' );
+                                       $out->addHTML( '<hr />' );
                                }
                        } else {
-                               $wgOut->addWikiMsg( 'undelete-nodiff' );
+                               $out->addWikiMsg( 'undelete-nodiff' );
                        }
                }
 
+               $link = Linker::linkKnown(
+                       $this->getTitle( $this->mTargetObj->getPrefixedDBkey() ),
+                       htmlspecialchars( $this->mTargetObj->getPrefixedText() )
+               );
+
+               $lang = $this->getLanguage();
+
                // date and time are separate parameters to facilitate localisation.
                // $time is kept for backward compat reasons.
-               $time = htmlspecialchars( $wgLang->timeAndDate( $timestamp, true ) );
-               $d = htmlspecialchars( $wgLang->date( $timestamp, true ) );
-               $t = htmlspecialchars( $wgLang->time( $timestamp, true ) );
-               $user = $skin->revUserTools( $rev );
+               $time = $lang->userTimeAndDate( $timestamp, $user );
+               $d = $lang->userDate( $timestamp, $user );
+               $t = $lang->userTime( $timestamp, $user );
+               $userLink = Linker::revUserTools( $rev );
 
                if( $this->mPreview ) {
                        $openDiv = '<div id="mw-undelete-revision" class="mw-warning">';
                } else {
                        $openDiv = '<div id="mw-undelete-revision">';
                }
-               $wgOut->addHTML( $openDiv );
+               $out->addHTML( $openDiv );
 
                // Revision delete links
                if ( !$this->mDiff ) {
-                       $revdel = $this->revDeleteLink( $rev );
+                       $revdel = Linker::getRevDeleteLink( $user, $rev, $this->mTargetObj );
                        if ( $revdel ) {
-                               $wgOut->addHTML( $revdel );
+                               $out->addHTML( "$revdel " );
                        }
                }
 
-               $wgOut->addWikiMsgArray( 'undelete-revision', array( $link, $time, $user, $d, $t ), array( 'replaceafter' ) );
-               $wgOut->addHTML( '</div>' );
+               $out->addHTML( $this->msg( 'undelete-revision' )->rawParams( $link )->params(
+                       $time )->rawParams( $userLink )->params( $d, $t )->parse() . '</div>' );
                wfRunHooks( 'UndeleteShowRevision', array( $this->mTargetObj, $rev ) );
 
                if( $this->mPreview ) {
                        // Hide [edit]s
-                       $popts = $wgOut->parserOptions();
+                       $popts = $out->parserOptions();
                        $popts->setEditSection( false );
-                       $wgOut->parserOptions( $popts );
-                       $wgOut->addWikiTextTitleTidy( $rev->getText( Revision::FOR_THIS_USER ), $this->mTargetObj, true );
+                       $out->parserOptions( $popts );
+                       $out->addWikiTextTitleTidy( $rev->getText( Revision::FOR_THIS_USER, $user ), $this->mTargetObj, true );
                }
 
-               $wgOut->addHTML(
+               $out->addHTML(
                        Xml::element( 'textarea', array(
                                        'readonly' => 'readonly',
-                                       'cols' => intval( $wgUser->getOption( 'cols' ) ),
-                                       'rows' => intval( $wgUser->getOption( 'rows' ) ) ),
-                               $rev->getText( Revision::FOR_THIS_USER ) . "\n" ) .
+                                       'cols' => intval( $user->getOption( 'cols' ) ),
+                                       'rows' => intval( $user->getOption( 'rows' ) ) ),
+                               $rev->getText( Revision::FOR_THIS_USER, $user ) . "\n" ) .
                        Xml::openElement( 'div' ) .
                        Xml::openElement( 'form', array(
                                'method' => 'post',
@@ -877,63 +875,19 @@ class SpecialUndelete extends SpecialPage {
                        Xml::element( 'input', array(
                                'type' => 'hidden',
                                'name' => 'wpEditToken',
-                               'value' => $wgUser->editToken() ) ) .
+                               'value' => $user->getEditToken() ) ) .
                        Xml::element( 'input', array(
                                'type' => 'submit',
                                'name' => 'preview',
-                               'value' => wfMsg( 'showpreview' ) ) ) .
+                               'value' => $this->msg( 'showpreview' )->text() ) ) .
                        Xml::element( 'input', array(
                                'name' => 'diff',
                                'type' => 'submit',
-                               'value' => wfMsg( 'showdiff' ) ) ) .
+                               'value' => $this->msg( 'showdiff' )->text() ) ) .
                        Xml::closeElement( 'form' ) .
                        Xml::closeElement( 'div' ) );
        }
 
-       /**
-        * Get a revision-deletion link, or disabled link, or nothing, depending
-        * on user permissions & the settings on the revision.
-        *
-        * Will use forward-compatible revision ID in the Special:RevDelete link
-        * if possible, otherwise the timestamp-based ID which may break after
-        * undeletion.
-        *
-        * @param Revision $rev
-        * @return string HTML fragment
-        */
-       function revDeleteLink( $rev ) {
-               global $wgUser;
-               $canHide = $wgUser->isAllowed( 'deleterevision' );
-               if( $canHide || ( $rev->getVisibility() && $wgUser->isAllowed( 'deletedhistory' ) ) ) {
-                       $skin = $this->getSkin();
-                       if( !$rev->userCan( Revision::DELETED_RESTRICTED ) ) {
-                               $revdlink = $skin->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
-                       } else {
-                               if ( $rev->getId() ) {
-                                       // RevDelete links using revision ID are stable across
-                                       // page deletion and undeletion; use when possible.
-                                       $query = array(
-                                               'type'   => 'revision',
-                                               'target' => $this->mTargetObj->getPrefixedDBkey(),
-                                               'ids'    => $rev->getId()
-                                       );
-                               } else {
-                                       // Older deleted entries didn't save a revision ID.
-                                       // We have to refer to these by timestamp, ick!
-                                       $query = array(
-                                               'type'   => 'archive',
-                                               'target' => $this->mTargetObj->getPrefixedDBkey(),
-                                               'ids'    => $rev->getTimestamp()
-                                       );
-                               }
-                               return $skin->revDeleteLink( $query,
-                                       $rev->isDeleted( File::DELETED_RESTRICTED ), $canHide );
-                       }
-               } else {
-                       return '';
-               }
-       }
-
        /**
         * Build a diff display between this and the previous either deleted
         * or non-deleted edit.
@@ -943,11 +897,10 @@ class SpecialUndelete extends SpecialPage {
         * @return String: HTML
         */
        function showDiff( $previousRev, $currentRev ) {
-               global $wgOut;
-
-               $diffEngine = new DifferenceEngine( $previousRev->getTitle() );
+        $contentHandler = ContentHandler::getForTitle( $this->getTitle() );
+               $diffEngine = $contentHandler->getDifferenceEngine( $this->getContext() );
                $diffEngine->showDiffStyle();
-               $wgOut->addHTML(
+               $this->getOutput()->addHTML(
                        "<div>" .
                        "<table border='0' width='98%' cellpadding='0' cellspacing='4' class='diff'>" .
                        "<col class='diff-marker' />" .
@@ -962,8 +915,8 @@ class SpecialUndelete extends SpecialPage {
                                $this->diffHeader( $currentRev, 'n' ) .
                                "</td>\n" .
                        "</tr>" .
-                       $diffEngine->generateDiffBody(
-                               $previousRev->getText(), $currentRev->getText() ) .
+                       $diffEngine->generateContentDiffBody(
+                               $previousRev->getContent(), $currentRev->getContent() ) .
                        "</table>" .
                        "</div>\n"
                );
@@ -975,8 +928,6 @@ class SpecialUndelete extends SpecialPage {
         * @return string
         */
        private function diffHeader( $rev, $prefix ) {
-               global $wgUser, $wgLang;
-               $sk = $this->getSkin();
                $isDeleted = !( $rev->getId() && $rev->getTitle() );
                if( $isDeleted ) {
                        /// @todo FIXME: $rev->getTitle() is null for deleted revs...?
@@ -991,26 +942,29 @@ class SpecialUndelete extends SpecialPage {
                        $targetQuery = array( 'oldid' => $rev->getId() );
                }
                // Add show/hide deletion links if available
-               $del = $this->revDeleteLink( $rev );
+               $user = $this->getUser();
+               $lang = $this->getLanguage();
+               $rdel = Linker::getRevDeleteLink( $user, $rev, $this->mTargetObj );
+               if ( $rdel ) $rdel = " $rdel";
                return
                        '<div id="mw-diff-' . $prefix . 'title1"><strong>' .
-                               $sk->link(
+                               Linker::link(
                                        $targetPage,
-                                       wfMsgHtml(
+                                       $this->msg(
                                                'revisionasof',
-                                               htmlspecialchars( $wgLang->timeanddate( $rev->getTimestamp(), true ) ),
-                                               htmlspecialchars( $wgLang->date( $rev->getTimestamp(), true ) ),
-                                               htmlspecialchars( $wgLang->time( $rev->getTimestamp(), true ) )
-                                       ),
+                                               $lang->userTimeAndDate( $rev->getTimestamp(), $user ),
+                                               $lang->userDate( $rev->getTimestamp(), $user ),
+                                               $lang->userTime( $rev->getTimestamp(), $user )
+                                       )->escaped(),
                                        array(),
                                        $targetQuery
                                ) .
                        '</strong></div>' .
                        '<div id="mw-diff-'.$prefix.'title2">' .
-                               $sk->revUserTools( $rev ) . '<br />' .
+                               Linker::revUserTools( $rev ) . '<br />' .
                        '</div>' .
                        '<div id="mw-diff-'.$prefix.'title3">' .
-                               $sk->revComment( $rev ) . $del . '<br />' .
+                               Linker::revComment( $rev ) . $rdel . '<br />' .
                        '</div>';
        }
 
@@ -1018,22 +972,24 @@ class SpecialUndelete extends SpecialPage {
         * Show a form confirming whether a tokenless user really wants to see a file
         */
        private function showFileConfirmationForm( $key ) {
-               global $wgOut, $wgUser, $wgLang;
+               $out = $this->getOutput();
+               $lang = $this->getLanguage();
+               $user = $this->getUser();
                $file = new ArchivedFile( $this->mTargetObj, '', $this->mFilename );
-               $wgOut->addWikiMsg( 'undelete-show-file-confirm',
+               $out->addWikiMsg( 'undelete-show-file-confirm',
                        $this->mTargetObj->getText(),
-                       $wgLang->date( $file->getTimestamp() ),
-                       $wgLang->time( $file->getTimestamp() ) );
-               $wgOut->addHTML(
+                       $lang->userDate( $file->getTimestamp(), $user ),
+                       $lang->userTime( $file->getTimestamp(), $user ) );
+               $out->addHTML(
                        Xml::openElement( 'form', array(
                                'method' => 'POST',
                                'action' => $this->getTitle()->getLocalURL(
                                        'target=' . urlencode( $this->mTarget ) .
                                        '&file=' . urlencode( $key ) .
-                                       '&token=' . urlencode( $wgUser->editToken( $key ) ) )
+                                       '&token=' . urlencode( $user->getEditToken( $key ) ) )
                                )
                        ) .
-                       Xml::submitButton( wfMsg( 'undelete-show-file-submit' ) ) .
+                       Xml::submitButton( $this->msg( 'undelete-show-file-submit' )->text() ) .
                        '</form>'
                );
        }
@@ -1042,35 +998,28 @@ class SpecialUndelete extends SpecialPage {
         * Show a deleted file version requested by the visitor.
         */
        private function showFile( $key ) {
-               global $wgOut, $wgRequest;
-               $wgOut->disable();
+               $this->getOutput()->disable();
 
                # We mustn't allow the output to be Squid cached, otherwise
                # if an admin previews a deleted image, and it's cached, then
                # a user without appropriate permissions can toddle off and
                # nab the image, and Squid will serve it
-               $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
-               $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
-               $wgRequest->response()->header( 'Pragma: no-cache' );
+               $response = $this->getRequest()->response();
+               $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
+               $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
+               $response->header( 'Pragma: no-cache' );
 
-               global $IP;
-               require_once( "$IP/includes/StreamFile.php" );
                $repo = RepoGroup::singleton()->getLocalRepo();
                $path = $repo->getZonePath( 'deleted' ) . '/' . $repo->getDeletedHashPath( $key ) . $key;
-               wfStreamFile( $path );
+               $repo->streamFile( $path );
        }
 
        private function showHistory() {
-               global $wgUser, $wgOut;
-
-               $sk = $wgUser->getSkin();
+               $out = $this->getOutput();
                if( $this->mAllowed ) {
-                       $wgOut->addModules( 'mediawiki.special.undelete' );
-                       $wgOut->setPageTitle( wfMsg( 'undeletepage' ) );
-               } else {
-                       $wgOut->setPageTitle( wfMsg( 'viewdeletedpage' ) );
+                       $out->addModules( 'mediawiki.special.undelete' );
                }
-               $wgOut->wrapWikiMsg(
+               $out->wrapWikiMsg(
                        "<div class='mw-undelete-pagetitle'>\n$1\n</div>\n",
                        array( 'undeletepagetitle', $this->mTargetObj->getPrefixedText() )
                );
@@ -1080,18 +1029,18 @@ class SpecialUndelete extends SpecialPage {
                /*
                $text = $archive->getLastRevisionText();
                if( is_null( $text ) ) {
-                       $wgOut->addWikiMsg( 'nohistory' );
+                       $out->addWikiMsg( 'nohistory' );
                        return;
                }
                */
-               $wgOut->addHTML( '<div class="mw-undelete-history">' );
+               $out->addHTML( '<div class="mw-undelete-history">' );
                if ( $this->mAllowed ) {
-                       $wgOut->addWikiMsg( 'undeletehistory' );
-                       $wgOut->addWikiMsg( 'undeleterevdel' );
+                       $out->addWikiMsg( 'undeletehistory' );
+                       $out->addWikiMsg( 'undeleterevdel' );
                } else {
-                       $wgOut->addWikiMsg( 'undeletehistorynoadmin' );
+                       $out->addWikiMsg( 'undeletehistorynoadmin' );
                }
-               $wgOut->addHTML( '</div>' );
+               $out->addHTML( '</div>' );
 
                # List all stored revisions
                $revisions = $archive->listRevisions();
@@ -1124,44 +1073,44 @@ class SpecialUndelete extends SpecialPage {
                        $action = $this->getTitle()->getLocalURL( array( 'action' => 'submit' ) );
                        # Start the form here
                        $top = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $action, 'id' => 'undelete' ) );
-                       $wgOut->addHTML( $top );
+                       $out->addHTML( $top );
                }
 
                # Show relevant lines from the deletion log:
-               $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) . "\n" );
-               LogEventsList::showLogExtract( $wgOut, 'delete', $this->mTargetObj->getPrefixedText() );
+               $out->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) . "\n" );
+               LogEventsList::showLogExtract( $out, 'delete', $this->mTargetObj );
                # Show relevant lines from the suppression log:
-               if( $wgUser->isAllowed( 'suppressionlog' ) ) {
-                       $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'suppress' ) ) . "\n" );
-                       LogEventsList::showLogExtract( $wgOut, 'suppress', $this->mTargetObj->getPrefixedText() );
+               if( $this->getUser()->isAllowed( 'suppressionlog' ) ) {
+                       $out->addHTML( Xml::element( 'h2', null, LogPage::logName( 'suppress' ) ) . "\n" );
+                       LogEventsList::showLogExtract( $out, 'suppress', $this->mTargetObj );
                }
 
                if( $this->mAllowed && ( $haveRevisions || $haveFiles ) ) {
                        # Format the user-visible controls (comment field, submission button)
                        # in a nice little table
-                       if( $wgUser->isAllowed( 'suppressrevision' ) ) {
+                       if( $this->getUser()->isAllowed( 'suppressrevision' ) ) {
                                $unsuppressBox =
                                        "<tr>
                                                <td>&#160;</td>
                                                <td class='mw-input'>" .
-                                                       Xml::checkLabel( wfMsg( 'revdelete-unsuppress' ), 'wpUnsuppress',
-                                                               'mw-undelete-unsuppress', $this->mUnsuppress ).
+                                                       Xml::checkLabel( $this->msg( 'revdelete-unsuppress' )->text(),
+                                                               'wpUnsuppress', 'mw-undelete-unsuppress', $this->mUnsuppress ).
                                                "</td>
                                        </tr>";
                        } else {
                                $unsuppressBox = '';
                        }
                        $table =
-                               Xml::fieldset( wfMsg( 'undelete-fieldset-title' ) ) .
+                               Xml::fieldset( $this->msg( 'undelete-fieldset-title' )->text() ) .
                                Xml::openElement( 'table', array( 'id' => 'mw-undelete-table' ) ) .
                                        "<tr>
                                                <td colspan='2' class='mw-undelete-extrahelp'>" .
-                                                       wfMsgExt( 'undeleteextrahelp', 'parse' ) .
+                                                       $this->msg( 'undeleteextrahelp' )->parseAsBlock() .
                                                "</td>
                                        </tr>
                                        <tr>
                                                <td class='mw-label'>" .
-                                                       Xml::label( wfMsg( 'undeletecomment' ), 'wpComment' ) .
+                                                       Xml::label( $this->msg( 'undeletecomment' )->text(), 'wpComment' ) .
                                                "</td>
                                                <td class='mw-input'>" .
                                                        Xml::input( 'wpComment', 50, $this->mComment, array( 'id' =>  'wpComment' ) ) .
@@ -1170,61 +1119,59 @@ class SpecialUndelete extends SpecialPage {
                                        <tr>
                                                <td>&#160;</td>
                                                <td class='mw-submit'>" .
-                                                       Xml::submitButton( wfMsg( 'undeletebtn' ), array( 'name' => 'restore', 'id' => 'mw-undelete-submit' ) ) . ' ' .
-                                                       Xml::submitButton( wfMsg( 'undeleteinvert' ), array( 'name' => 'invert', 'id' => 'mw-undelete-invert' ) ) .
+                                                       Xml::submitButton( $this->msg( 'undeletebtn' )->text(), array( 'name' => 'restore', 'id' => 'mw-undelete-submit' ) ) . ' ' .
+                                                       Xml::submitButton( $this->msg( 'undeleteinvert' )->text(), array( 'name' => 'invert', 'id' => 'mw-undelete-invert' ) ) .
                                                "</td>
                                        </tr>" .
                                        $unsuppressBox .
                                Xml::closeElement( 'table' ) .
                                Xml::closeElement( 'fieldset' );
 
-                       $wgOut->addHTML( $table );
+                       $out->addHTML( $table );
                }
 
-               $wgOut->addHTML( Xml::element( 'h2', null, wfMsg( 'history' ) ) . "\n" );
+               $out->addHTML( Xml::element( 'h2', null, $this->msg( 'history' )->text() ) . "\n" );
 
                if( $haveRevisions ) {
                        # The page's stored (deleted) history:
-                       $wgOut->addHTML( '<ul>' );
+                       $out->addHTML( '<ul>' );
                        $remaining = $revisions->numRows();
                        $earliestLiveTime = $this->mTargetObj->getEarliestRevTime();
 
                        foreach ( $revisions as $row ) {
                                $remaining--;
-                               $wgOut->addHTML( $this->formatRevisionRow( $row, $earliestLiveTime, $remaining, $sk ) );
+                               $out->addHTML( $this->formatRevisionRow( $row, $earliestLiveTime, $remaining ) );
                        }
                        $revisions->free();
-                       $wgOut->addHTML( '</ul>' );
+                       $out->addHTML( '</ul>' );
                } else {
-                       $wgOut->addWikiMsg( 'nohistory' );
+                       $out->addWikiMsg( 'nohistory' );
                }
 
                if( $haveFiles ) {
-                       $wgOut->addHTML( Xml::element( 'h2', null, wfMsg( 'filehist' ) ) . "\n" );
-                       $wgOut->addHTML( '<ul>' );
+                       $out->addHTML( Xml::element( 'h2', null, $this->msg( 'filehist' )->text() ) . "\n" );
+                       $out->addHTML( '<ul>' );
                        foreach ( $files as $row ) {
-                               $wgOut->addHTML( $this->formatFileRow( $row, $sk ) );
+                               $out->addHTML( $this->formatFileRow( $row ) );
                        }
                        $files->free();
-                       $wgOut->addHTML( '</ul>' );
+                       $out->addHTML( '</ul>' );
                }
 
                if ( $this->mAllowed ) {
                        # Slip in the hidden controls here
                        $misc  = Html::hidden( 'target', $this->mTarget );
-                       $misc .= Html::hidden( 'wpEditToken', $wgUser->editToken() );
+                       $misc .= Html::hidden( 'wpEditToken', $this->getUser()->getEditToken() );
                        $misc .= Xml::closeElement( 'form' );
-                       $wgOut->addHTML( $misc );
+                       $out->addHTML( $misc );
                }
 
                return true;
        }
 
-       private function formatRevisionRow( $row, $earliestLiveTime, $remaining, $sk ) {
-               global $wgLang;
-
+       private function formatRevisionRow( $row, $earliestLiveTime, $remaining ) {
                $rev = Revision::newFromArchiveRow( $row,
-                       array( 'page' => $this->mTargetObj->getArticleId() ) );
+                       array( 'page' => $this->mTargetObj->getArticleID() ) );
                $stxt = '';
                $ts = wfTimestamp( TS_MW, $row->ar_timestamp );
                // Build checkboxen...
@@ -1241,18 +1188,19 @@ class SpecialUndelete extends SpecialPage {
                } else {
                        $checkBox = '';
                }
+               $user = $this->getUser();
                // Build page & diff links...
                if( $this->mCanView ) {
                        $titleObj = $this->getTitle();
                        # Last link
-                       if( !$rev->userCan( Revision::DELETED_TEXT ) ) {
-                               $pageLink = htmlspecialchars( $wgLang->timeanddate( $ts, true ) );
-                               $last = wfMsgHtml( 'diff' );
+                       if( !$rev->userCan( Revision::DELETED_TEXT, $this->getUser() ) ) {
+                               $pageLink = htmlspecialchars( $this->getLanguage()->userTimeAndDate( $ts, $user ) );
+                               $last = $this->msg( 'diff' )->escaped();
                        } elseif( $remaining > 0 || ( $earliestLiveTime && $ts > $earliestLiveTime ) ) {
-                               $pageLink = $this->getPageLink( $rev, $titleObj, $ts, $sk );
-                               $last = $sk->linkKnown(
+                               $pageLink = $this->getPageLink( $rev, $titleObj, $ts );
+                               $last = Linker::linkKnown(
                                        $titleObj,
-                                       wfMsgHtml( 'diff' ),
+                                       $this->msg( 'diff' )->escaped(),
                                        array(),
                                        array(
                                                'target' => $this->mTargetObj->getPrefixedText(),
@@ -1261,68 +1209,64 @@ class SpecialUndelete extends SpecialPage {
                                        )
                                );
                        } else {
-                               $pageLink = $this->getPageLink( $rev, $titleObj, $ts, $sk );
-                               $last = wfMsgHtml( 'diff' );
+                               $pageLink = $this->getPageLink( $rev, $titleObj, $ts );
+                               $last = $this->msg( 'diff' )->escaped();
                        }
                } else {
-                       $pageLink = htmlspecialchars( $wgLang->timeanddate( $ts, true ) );
-                       $last = wfMsgHtml( 'diff' );
+                       $pageLink = htmlspecialchars( $this->getLanguage()->userTimeAndDate( $ts, $user ) );
+                       $last = $this->msg( 'diff' )->escaped();
                }
                // User links
-               $userLink = $sk->revUserTools( $rev );
+               $userLink = Linker::revUserTools( $rev );
                // Revision text size
                $size = $row->ar_len;
                if( !is_null( $size ) ) {
-                       $stxt = $sk->formatRevisionSize( $size );
+                       $stxt = Linker::formatRevisionSize( $size );
                }
                // Edit summary
-               $comment = $sk->revComment( $rev );
+               $comment = Linker::revComment( $rev );
                // Revision delete links
-               $revdlink = $this->revDeleteLink( $rev );
+               $revdlink = Linker::getRevDeleteLink( $user, $rev, $this->mTargetObj );
                return "<li>$checkBox $revdlink ($last) $pageLink . . $userLink $stxt $comment</li>";
        }
 
-       private function formatFileRow( $row, $sk ) {
-               global $wgUser, $wgLang;
-
+       private function formatFileRow( $row ) {
                $file = ArchivedFile::newFromRow( $row );
 
                $ts = wfTimestamp( TS_MW, $row->fa_timestamp );
+               $user = $this->getUser();
                if( $this->mAllowed && $row->fa_storage_key ) {
                        $checkBox = Xml::check( 'fileid' . $row->fa_id );
                        $key = urlencode( $row->fa_storage_key );
-                       $pageLink = $this->getFileLink( $file, $this->getTitle(), $ts, $key, $sk );
+                       $pageLink = $this->getFileLink( $file, $this->getTitle(), $ts, $key );
                } else {
                        $checkBox = '';
-                       $pageLink = $wgLang->timeanddate( $ts, true );
+                       $pageLink = $this->getLanguage()->userTimeAndDate( $ts, $user );
                }
-               $userLink = $this->getFileUser( $file, $sk );
-               $data =
-                       wfMsg( 'widthheight',
-                               $wgLang->formatNum( $row->fa_width ),
-                               $wgLang->formatNum( $row->fa_height ) ) .
-                       ' (' .
-                       wfMsg( 'nbytes', $wgLang->formatNum( $row->fa_size ) ) .
-                       ')';
-               $data = htmlspecialchars( $data );
-               $comment = $this->getFileComment( $file, $sk );
+               $userLink = $this->getFileUser( $file );
+               $data = $this->msg( 'widthheight' )->numParams( $row->fa_width, $row->fa_height )->text();
+               $bytes = $this->msg( 'parentheses' )->rawParams( $this->msg( 'nbytes' )->numParams( $row->fa_size )->text() )->plain();
+               $data = htmlspecialchars( $data . ' ' . $bytes );
+               $comment = $this->getFileComment( $file );
+
                // Add show/hide deletion links if available
-               $canHide = $wgUser->isAllowed( 'deleterevision' );
-               if( $canHide || ( $file->getVisibility() && $wgUser->isAllowed( 'deletedhistory' ) ) ) {
-                       if( !$file->userCan( File::DELETED_RESTRICTED ) ) {
-                               $revdlink = $sk->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
+               $canHide = $user->isAllowed( 'deleterevision' );
+               if( $canHide || ( $file->getVisibility() && $user->isAllowed( 'deletedhistory' ) ) ) {
+                       if( !$file->userCan( File::DELETED_RESTRICTED, $user ) ) {
+                               $revdlink = Linker::revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
                        } else {
                                $query = array(
                                        'type' => 'filearchive',
                                        'target' => $this->mTargetObj->getPrefixedDBkey(),
                                        'ids' => $row->fa_id
                                );
-                               $revdlink = $sk->revDeleteLink( $query,
+                               $revdlink = Linker::revDeleteLink( $query,
                                        $file->isDeleted( File::DELETED_RESTRICTED ), $canHide );
                        }
                } else {
                        $revdlink = '';
                }
+
                return "<li>$checkBox $revdlink $pageLink . . $userLink $data $comment</li>\n";
        }
 
@@ -1330,20 +1274,20 @@ class SpecialUndelete extends SpecialPage {
         * Fetch revision text link if it's available to all users
         *
         * @param $rev Revision
-        * @param $sk Skin
+        * @param $titleObj Title
+        * @param $ts string Timestamp
         * @return string
         */
-       function getPageLink( $rev, $titleObj, $ts, $sk ) {
-               global $wgLang;
-
-               $time = htmlspecialchars( $wgLang->timeanddate( $ts, true ) );
+       function getPageLink( $rev, $titleObj, $ts ) {
+               $user = $this->getUser();
+               $time = $this->getLanguage()->userTimeAndDate( $ts, $user );
 
-               if( !$rev->userCan( Revision::DELETED_TEXT ) ) {
+               if( !$rev->userCan( Revision::DELETED_TEXT, $user ) ) {
                        return '<span class="history-deleted">' . $time . '</span>';
                } else {
-                       $link = $sk->linkKnown(
+                       $link = Linker::linkKnown(
                                $titleObj,
-                               $time,
+                               htmlspecialchars( $time ),
                                array(),
                                array(
                                        'target' => $this->mTargetObj->getPrefixedText(),
@@ -1361,23 +1305,27 @@ class SpecialUndelete extends SpecialPage {
         * Fetch image view link if it's available to all users
         *
         * @param $file File
-        * @param $sk Skin
+        * @param $titleObj Title
+        * @param $ts string A timestamp
+        * @param $key String: a storage key
+        *
         * @return String: HTML fragment
         */
-       function getFileLink( $file, $titleObj, $ts, $key, $sk ) {
-               global $wgLang, $wgUser;
+       function getFileLink( $file, $titleObj, $ts, $key ) {
+               $user = $this->getUser();
+               $time = $this->getLanguage()->userTimeAndDate( $ts, $user );
 
-               if( !$file->userCan( File::DELETED_FILE ) ) {
-                       return '<span class="history-deleted">' . $wgLang->timeanddate( $ts, true ) . '</span>';
+               if( !$file->userCan( File::DELETED_FILE, $user ) ) {
+                       return '<span class="history-deleted">' . $time . '</span>';
                } else {
-                       $link = $sk->linkKnown(
+                       $link = Linker::linkKnown(
                                $titleObj,
-                               $wgLang->timeanddate( $ts, true ),
+                               htmlspecialchars( $time ),
                                array(),
                                array(
                                        'target' => $this->mTargetObj->getPrefixedText(),
                                        'file' => $key,
-                                       'token' => $wgUser->editToken( $key )
+                                       'token' => $user->getEditToken( $key )
                                )
                        );
                        if( $file->isDeleted( File::DELETED_FILE ) ) {
@@ -1391,15 +1339,14 @@ class SpecialUndelete extends SpecialPage {
         * Fetch file's user id if it's available to this user
         *
         * @param $file File
-        * @param $sk Skin
         * @return String: HTML fragment
         */
-       function getFileUser( $file, $sk ) {
-               if( !$file->userCan( File::DELETED_USER ) ) {
-                       return '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
+       function getFileUser( $file ) {
+               if( !$file->userCan( File::DELETED_USER, $this->getUser() ) ) {
+                       return '<span class="history-deleted">' . $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
                } else {
-                       $link = $sk->userLink( $file->getRawUser(), $file->getRawUserText() ) .
-                               $sk->userToolLinks( $file->getRawUser(), $file->getRawUserText() );
+                       $link = Linker::userLink( $file->getRawUser(), $file->getRawUserText() ) .
+                               Linker::userToolLinks( $file->getRawUser(), $file->getRawUserText() );
                        if( $file->isDeleted( File::DELETED_USER ) ) {
                                $link = '<span class="history-deleted">' . $link . '</span>';
                        }
@@ -1411,15 +1358,14 @@ class SpecialUndelete extends SpecialPage {
         * Fetch file upload comment if it's available to this user
         *
         * @param $file File
-        * @param $sk Skin
         * @return String: HTML fragment
         */
-       function getFileComment( $file, $sk ) {
-               if( !$file->userCan( File::DELETED_COMMENT ) ) {
+       function getFileComment( $file ) {
+               if( !$file->userCan( File::DELETED_COMMENT, $this->getUser() ) ) {
                        return '<span class="history-deleted"><span class="comment">' .
-                               wfMsgHtml( 'rev-deleted-comment' ) . '</span></span>';
+                               $this->msg( 'rev-deleted-comment' )->escaped() . '</span></span>';
                } else {
-                       $link = $sk->commentBlock( $file->getRawDescription() );
+                       $link = Linker::commentBlock( $file->getRawDescription() );
                        if( $file->isDeleted( File::DELETED_COMMENT ) ) {
                                $link = '<span class="history-deleted">' . $link . '</span>';
                        }
@@ -1428,43 +1374,44 @@ class SpecialUndelete extends SpecialPage {
        }
 
        function undelete() {
-               global $wgOut, $wgUser;
+               global $wgUploadMaintenance;
+
+               if ( $wgUploadMaintenance && $this->mTargetObj->getNamespace() == NS_FILE ) {
+                       throw new ErrorPageError( 'undelete-error', 'filedelete-maintenance' );
+               }
+
                if ( wfReadOnly() ) {
-                       $wgOut->readOnlyPage();
-                       return;
+                       throw new ReadOnlyError;
                }
-               if( !is_null( $this->mTargetObj ) ) {
-                       $archive = new PageArchive( $this->mTargetObj );
-                       wfRunHooks( 'UndeleteForm::undelete', array( &$archive, $this->mTargetObj ) );
-                       $ok = $archive->undelete(
-                               $this->mTargetTimestamp,
-                               $this->mComment,
-                               $this->mFileVersions,
-                               $this->mUnsuppress );
-
-                       if( is_array( $ok ) ) {
-                               if ( $ok[1] ) { // Undeleted file count
-                                       wfRunHooks( 'FileUndeleteComplete', array(
-                                               $this->mTargetObj, $this->mFileVersions,
-                                               $wgUser, $this->mComment ) );
-                               }
 
-                               $skin = $wgUser->getSkin();
-                               $link = $skin->linkKnown( $this->mTargetObj );
-                               $wgOut->addWikiMsgArray( 'undeletedpage', array( $link ), array( 'replaceafter' ) );
-                       } else {
-                               $wgOut->showFatalError( wfMsg( 'cannotundelete' ) );
-                               $wgOut->addWikiMsg( 'undeleterevdel' );
+               $out = $this->getOutput();
+               $archive = new PageArchive( $this->mTargetObj );
+               wfRunHooks( 'UndeleteForm::undelete', array( &$archive, $this->mTargetObj ) );
+               $ok = $archive->undelete(
+                       $this->mTargetTimestamp,
+                       $this->mComment,
+                       $this->mFileVersions,
+                       $this->mUnsuppress );
+
+               if( is_array( $ok ) ) {
+                       if ( $ok[1] ) { // Undeleted file count
+                               wfRunHooks( 'FileUndeleteComplete', array(
+                                       $this->mTargetObj, $this->mFileVersions,
+                                       $this->getUser(), $this->mComment ) );
                        }
 
-                       // Show file deletion warnings and errors
-                       $status = $archive->getFileStatus();
-                       if( $status && !$status->isGood() ) {
-                               $wgOut->addWikiText( $status->getWikiText( 'undelete-error-short', 'undelete-error-long' ) );
-                       }
+                       $link = Linker::linkKnown( $this->mTargetObj );
+                       $out->addHTML( $this->msg( 'undeletedpage' )->rawParams( $link )->parse() );
                } else {
-                       $wgOut->showFatalError( wfMsg( 'cannotundelete' ) );
+                       $out->setPageTitle( $this->msg( 'undelete-error' ) );
+                       $out->addWikiMsg( 'cannotundelete' );
+                       $out->addWikiMsg( 'undeleterevdel' );
+               }
+
+               // Show file deletion warnings and errors
+               $status = $archive->getFileStatus();
+               if( $status && !$status->isGood() ) {
+                       $out->addWikiText( '<div class="error">' . $status->getWikiText( 'undelete-error-short', 'undelete-error-long' ) . '</div>' );
                }
-               return false;
        }
 }