From e00cb4d4290974878040eda408baa513942fc62d Mon Sep 17 00:00:00 2001
From: azaozz <azaozz@1a063a9b-81f0-0310-95a4-ce76da25c4cd>
Date: Sat, 15 Nov 2008 07:07:59 +0000
Subject: [PATCH] Improve the check all: click to check all checkboxes, click
 again to uncheck all, Shift/click to toggle. Shift/clicking two consecutive
 boxes checks the range between them as before. Fixes #8217

git-svn-id: http://svn.automattic.com/wordpress/trunk@9708 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-admin/js/common.js | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/wp-admin/js/common.js b/wp-admin/js/common.js
index 91d07e3ce8..860a9d9c2d 100644
--- a/wp-admin/js/common.js
+++ b/wp-admin/js/common.js
@@ -200,11 +200,17 @@ jQuery(document).ready( function($) {
 		return true;
 	} );
 
-	$( 'thead :checkbox, tfoot :checkbox' ).click( function() {
-		$(this).parents( 'form:first' ).find( 'tbody:visible .check-column :checkbox' ).attr( 'checked', function() {
-			return $(this).attr( 'checked' ) ? '' : 'checked';
+	$( 'thead :checkbox, tfoot :checkbox' ).click( function(e) {
+		var c = $(this).attr('checked');
+
+		$(this).parents( 'form:first' ).find( 'table .check-column :checkbox' ).attr( 'checked', function() {
+			if ( e.shiftKey )
+				return $(this).attr( 'checked' ) ? '' : 'checked';
+			else if (c)
+				return 'checked';
+
+			return '';
 		});
-		return false;
 	});
 });