Some more fixes in `parseJS`

HISTORY.md

@@ -5,7 +5,8 @@ https://github.com/josdejong/jsoneditor
 
 ## 2014-08-01, version 3.1.2
 
-- Fixed `parseJS` not being able to parse a single quoted string to JSON.
+- Some fixes/improvements in `parseJS` (to parse a JSON object from a JavaScript
+  object).
 
 
 ## 2014-08-01, version 3.1.1

src/js/util.js

@@ -45,7 +45,9 @@ define(function () {
     while(i < jsString.length) {
       var c = jsString.charAt(i);
 
-      if (c === '"' || c === '\'') {
+      var isEscaped = jsString.charAt(i - 1) === '\\';
+      if ((c === '"' || c === '\'') && !isEscaped) {
+
         if (c === inString) {
           // end of string
           inString = false;
@@ -55,12 +57,10 @@ define(function () {
           inString = c;
         }
         else {
-          // add escape character if not escaped
-          if (jsString.charAt(i - 1) !== '\\') {
+          // add escape character
           chars.push('\\');
         }
       }
-      }
 
       chars.push(c);
       i++;