From 2f256763f0f70563e576f390adc8ee33e4e95daf Mon Sep 17 00:00:00 2001
From: Lupin <lupin-wp@users.mediawiki.org>
Date: Wed, 1 Mar 2006 03:28:48 +0000
Subject: [PATCH] Bug 5136: corner cases with relative oldids are wrong

---
 includes/RawPage.php | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/includes/RawPage.php b/includes/RawPage.php
index b622fec433..0e46df5bde 100644
--- a/includes/RawPage.php
+++ b/includes/RawPage.php
@@ -44,10 +44,21 @@ class RawPage {
 		$oldid = $this->mRequest->getInt( 'oldid' );
 		switch ( $wgRequest->getText( 'direction' ) ) {
 			case 'next': 
-				$oldid = $this->mTitle->getNextRevisionId( $oldid );
+				# output next revision, or nothing if there isn't one
+				if ( $oldid ) {
+					$oldid = $this->mTitle->getNextRevisionId( $oldid );
+				}
+				$oldid = $oldid ? $oldid : -1;
 				break;
 			case 'prev': 
-				$oldid = $this->mTitle->getPreviousRevisionId( $oldid );
+				# output previous revision, or nothing if there isn't one
+				if ( ! $oldid ) {
+					# get the current revision so we can get the penultimate one
+					$this->mArticle->getTouched();
+					$oldid = $this->mArticle->mLatest;
+				}
+				$prev = $this->mTitle->getPreviousRevisionId( $oldid );
+				$oldid = $prev ? $prev : -1 ;
 				break;
 			case 'cur':
 				$oldid = 0;
-- 
2.20.1