From 13b4ba23ba62cf7db45eadf03f3ebb62e6974f4b Mon Sep 17 00:00:00 2001
From: Leo Koppelkamm <diebuche@users.mediawiki.org>
Date: Sat, 16 Apr 2011 08:44:33 +0000
Subject: [PATCH] Followup to r86047: Fix empty button on pages with only one
 rev

---
 .../mediawiki.action.history.js               | 22 ++++++++++++++-----
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/resources/mediawiki.action/mediawiki.action.history.js b/resources/mediawiki.action/mediawiki.action.history.js
index 616e7947f9..92a780bb72 100644
--- a/resources/mediawiki.action/mediawiki.action.history.js
+++ b/resources/mediawiki.action/mediawiki.action.history.js
@@ -50,15 +50,25 @@ jQuery( function( $ ) {
 	};
 	
 	var fixCompare = function () {
-		var $histForm = $( '#mw-history-compare' ),
-			$diffList = $( '#pagehistory' ),
-			buttonText = $histForm.find( 'input.historysubmit' ).remove().first().val(),
-			$compareLink = $( '<a></a>', {
+		var $diffList = $( '#pagehistory' ),
+		 $histForm = $( '#mw-history-compare' ),
+		 $buttons = $histForm.find( 'input.historysubmit' );
+
+		// There's only one rev, nothing to do here
+		if ( !$buttons.length ) {
+			return false;
+		}
+
+		var buttonText = $buttons.remove().first().val(),
+		  $compareLink = $( '<a></a>', {
 				'class': 'compare-link',
 				'text': buttonText
 			}).button();
-		$histForm.prepend( $compareLink )
-							.append( $compareLink.clone() );
+		$histForm.prepend( $compareLink );
+		if ( $buttons.length == 2 ) {
+			$histForm.append( $compareLink.clone() );
+		}
+
 		function updateCompare() {
 			var $radio = $histForm.find( 'input[type=radio]:checked' );
 			var genLink = mw.config.get( 'wgScript' )
-- 
2.20.1