From 98e68773b54d5f47c7b10bd717181c69ddd265e2 Mon Sep 17 00:00:00 2001
From: Victor Vasiliev <vasilievvv@users.mediawiki.org>
Date: Thu, 27 Dec 2007 18:05:40 +0000
Subject: [PATCH] * Hide undo link if user can't edit article

---
 RELEASE-NOTES            |  1 +
 includes/PageHistory.php | 14 ++++++++------
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index a40d1a29ea..0eba7fb022 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -267,6 +267,7 @@ it from source control: http://www.mediawiki.org/wiki/Download_from_SVN
 * (bug 12371) Handle more namespace case variants in namespaceDupes.php
 * (bug 12380) Bot-friendly EditPage::spamPage
 * (bug 8066) Spaces can't be entered in special page aliases
+* Hide undo link if user can't edit article
 
 == Parser changes in 1.12 ==
 
diff --git a/includes/PageHistory.php b/includes/PageHistory.php
index d2da47a5eb..9d8466528d 100644
--- a/includes/PageHistory.php
+++ b/includes/PageHistory.php
@@ -267,12 +267,14 @@ class PageHistory {
 					. '</span>';
 			}
 
-			$undolink = $this->mSkin->makeKnownLinkObj(
-				$this->mTitle,
-				wfMsgHtml( 'editundo' ),
-				'action=edit&undoafter=' . $next->rev_id . '&undo=' . $rev->getId()
-			);
-			$tools[] = "<span class=\"mw-history-undo\">{$undolink}</span>";
+			if( $this->mTitle->quickUserCan( 'edit' ) ) {
+				$undolink = $this->mSkin->makeKnownLinkObj(
+					$this->mTitle,
+					wfMsgHtml( 'editundo' ),
+					'action=edit&undoafter=' . $next->rev_id . '&undo=' . $rev->getId()
+				);
+				$tools[] = "<span class=\"mw-history-undo\">{$undolink}</span>";
+			}
 		}
 		
 		if( $tools ) {
-- 
2.20.1