From 6464a3852b6822b187b80e37f5eeed3effbf4286 Mon Sep 17 00:00:00 2001
From: nightwing <amirjanyan@gmail.com>
Date: Sun, 22 May 2011 13:30:35 +0500
Subject: [PATCH] do not call dom functions if possible

---
 lib/ace/layer/cursor.js | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/lib/ace/layer/cursor.js b/lib/ace/layer/cursor.js
index 224b638f..2bde0115 100644
--- a/lib/ace/layer/cursor.js
+++ b/lib/ace/layer/cursor.js
@@ -120,14 +120,13 @@ var Cursor = function(parentEl) {
         this.cursor.style.width = config.characterWidth + "px";
         this.cursor.style.height = config.lineHeight + "px";
 
-        if (this.isVisible) {
-            this.element.appendChild(this.cursor);
-        }
-
-        if (this.session.getOverwrite()) {
-            dom.addCssClass(this.cursor, "ace_overwrite");
-        } else {
-            dom.removeCssClass(this.cursor, "ace_overwrite");
+        var overwrite = this.session.getOverwrite()
+        if (overwrite != this.overwrite) {
+            this.overwrite = overwrite;
+            if (overwrite)
+                dom.addCssClass(this.cursor, "ace_overwrite");
+            else
+                dom.removeCssClass(this.cursor, "ace_overwrite");
         }
 
         this.restartTimer();