Merge "BaseTemplate: Hard-deprecate msgWiki()"

[lhc/web/wiklou.git] / includes / diff / DifferenceEngine.php

diff --git a/includes/diff/DifferenceEngine.php b/includes/diff/DifferenceEngine.php
index 8a5caa2..7e4e53e 100644 (file)
--- a/includes/diff/DifferenceEngine.php
+++ b/includes/diff/DifferenceEngine.php
@@ -1713,14 +1713,29 @@ class DifferenceEngine extends ContextSource {
         *     false signifies that there is no previous/next revision ($old is the oldest/newest one).
         */
        public function mapDiffPrevNext( $old, $new ) {
+               $rl = MediaWikiServices::getInstance()->getRevisionLookup();
                if ( $new === 'prev' ) {
                        // Show diff between revision $old and the previous one. Get previous one from DB.
                        $newid = intval( $old );
-                       $oldid = $this->getTitle()->getPreviousRevisionID( $newid );
+                       $oldid = false;
+                       $newRev = $rl->getRevisionById( $newid );
+                       if ( $newRev ) {
+                               $oldRev = $rl->getPreviousRevision( $newRev );
+                               if ( $oldRev ) {
+                                       $oldid = $oldRev->getId();
+                               }
+                       }
                } elseif ( $new === 'next' ) {
                        // Show diff between revision $old and the next one. Get next one from DB.
                        $oldid = intval( $old );
-                       $newid = $this->getTitle()->getNextRevisionID( $oldid );
+                       $newid = false;
+                       $oldRev = $rl->getRevisionById( $oldid );
+                       if ( $oldRev ) {
+                               $newRev = $rl->getNextRevision( $oldRev );
+                               if ( $newRev ) {
+                                       $newid = $newRev->getId();
+                               }
+                       }
                } else {
                        $oldid = intval( $old );
                        $newid = intval( $new );