From bd7b145a7fad96171705be91cb3589a037600450 Mon Sep 17 00:00:00 2001
From: Fabian Jakobs <fabian.jakobs@web.de>
Date: Tue, 25 Jan 2011 13:34:20 +0100
Subject: [PATCH] display non regular whitespace in show invisibles

---
 lib/ace/layer/text.js | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/lib/ace/layer/text.js b/lib/ace/layer/text.js
index 8ef2ebf3..ecaa6698 100644
--- a/lib/ace/layer/text.js
+++ b/lib/ace/layer/text.js
@@ -248,18 +248,23 @@ var Text = function(parentEl) {
     };
 
     this.$renderLine = function(stringBuilder, row, tokens) {
-//        if (this.showInvisibles) {
-//            var self = this;
-//            var spaceRe = /[\v\f \u00a0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000]+/g;
-//            var spaceReplace = function(space) {
-//                var space = new Array(space.length+1).join(self.SPACE_CHAR);
-//                return "<span class='ace_invisible'>" + space + "</span>";
-//            };
-//        }
-//        else {
+        if (this.showInvisibles) {
+            var self = this;
+            var spaceRe = /( +)|([\v\f \u00a0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000])/g;
+            var spaceReplace = function(space) {
+                if (space.charCodeAt(0) == 32)
+                    return new Array(space.length+1).join("&nbsp;");
+                else {
+                    var space = new Array(space.length+1).join(self.SPACE_CHAR);
+                    return "<span class='ace_invisible'>" + space + "</span>";
+                }
+                    
+            };
+        }
+        else {
             var spaceRe = /[\v\f \u00a0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000]/g;
             var spaceReplace = "&nbsp;";
-//        }
+        }
 
         for ( var i = 0; i < tokens.length; i++) {
             var token = tokens[i];