From 8e2d749605e2373f8bfee2879afbafc255a97194 Mon Sep 17 00:00:00 2001
From: Joel Martin <github@martintribe.org>
Date: Thu, 18 Oct 2012 16:13:00 -0500
Subject: [PATCH] util.js: script load sequential execution changes.

Related to issue: https://github.com/kanaka/noVNC/issues/205

Split out the function to load a single script to Util.load_script.

In order to get sequential load, when on IE set the script defer flag.
It is currently working on webkit and firefox but just in case also
set the script.async flag to make sure that scripts execute in the
order they are added. Scripts should still load in parallel.
---
 include/util.js | 31 +++++++++++++++++++++++--------
 1 file changed, 23 insertions(+), 8 deletions(-)

diff --git a/include/util.js b/include/util.js
index 7d1e4c02..2767080c 100644
--- a/include/util.js
+++ b/include/util.js
@@ -218,17 +218,31 @@ Util.get_include_uri = function() {
     return (typeof INCLUDE_URI !== "undefined") ? INCLUDE_URI : "include/";
 }
 Util._pending_scripts = [];
+Util.load_script = function(file, onload) {
+    var head = document.getElementsByTagName('head')[0];
+    var script = document.createElement('script');
+    script.type = 'text/javascript';
+    script.src = Util.get_include_uri() + file;
+    // In order script execution for webkit and firefox    
+    // https://developer.mozilla.org/en-US/docs/HTML/Element/script
+    script.async = false;
+    if (Util.Engine.trident) {
+        // In order script execution for IE 9
+        // http://ui.cognifide.com/slides/async-js/template/#26
+        script.defer = true;
+    }
+    //console.log("loading script: " + Util.get_include_uri() +  files[f]);
+    head.appendChild(script);
+    if (typeof onload !== "undefined") {
+        script.onload = script.onreadystatechange = onload;
+    }
+    return script;
+};
 Util.load_scripts = function(files) {
     var head = document.getElementsByTagName('head')[0],
         ps = Util._pending_scripts;
     for (var f=0; f<files.length; f++) {
-        var script = document.createElement('script');
-        script.type = 'text/javascript';
-        script.src = Util.get_include_uri() + files[f];
-        //console.log("loading script: " + Util.get_include_uri() +  files[f]);
-        head.appendChild(script);
-        ps.push(script);
-        script.onload = script.onreadystatechange = function (e) {
+        var script = Util.load_script(files[f], function (e) {
             if (!this.readyState || 
                 this.readyState == 'complete' ||
                 this.readyState == 'loaded') {
@@ -242,7 +256,8 @@ Util.load_scripts = function(files) {
                     window.onscriptsload();
                 }
             }
-        }
+        });
+        ps.push(script);
     }
 }