From 8ef3e59416bebc1929c059f2636d3e3f95a89d7d Mon Sep 17 00:00:00 2001
From: Jeremy Ruston <jeremy@osmosoft.com>
Date: Sun, 23 Dec 2012 10:36:37 +0000
Subject: [PATCH] Improved whitespace handling in classes

---
 core/modules/utils/parsetree.js | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/core/modules/utils/parsetree.js b/core/modules/utils/parsetree.js
index 9c5832328..a2b1428ce 100644
--- a/core/modules/utils/parsetree.js
+++ b/core/modules/utils/parsetree.js
@@ -20,11 +20,18 @@ exports.addAttributeToParseTreeNode = function(node,name,value) {
 };
 
 exports.addClassToParseTreeNode = function(node,classString) {
+	var classes = [];
 	if(node.type === "element") {
 		node.attributes = node.attributes || {};
 		node.attributes["class"] = node.attributes["class"] || {type: "string", value: ""};
 		if(node.attributes["class"].type === "string") {
-			node.attributes["class"].value += " " + classString;
+			if(node.attributes["class"].value !== "") {
+				classes = node.attributes["class"].value.split(" ");
+			}
+			if(classString !== "") {
+				$tw.utils.pushTop(classes,classString.split(" "));
+			}
+			node.attributes["class"].value = classes.join(" ");
 		}
 	}
 };