From 1d795c0643b3402a98f9f4062ea18d57a987ee46 Mon Sep 17 00:00:00 2001
From: Joel Martin <github@martintribe.org>
Date: Thu, 1 Nov 2012 11:07:26 -0500
Subject: [PATCH] Pull include/util.js from noVNC.

Pull version 51562999c7 load_scripts fixes.
---
 include/util.js | 50 ++++++++++++++++++++++++++++++++++---------------
 1 file changed, 35 insertions(+), 15 deletions(-)

diff --git a/include/util.js b/include/util.js
index ab2e1c1..67d2133 100644
--- a/include/util.js
+++ b/include/util.js
@@ -217,32 +217,52 @@ Util.conf_defaults = function(cfg, api, defaults, arr) {
 Util.get_include_uri = function() {
     return (typeof INCLUDE_URI !== "undefined") ? INCLUDE_URI : "include/";
 }
+Util._loading_scripts = [];
 Util._pending_scripts = [];
 Util.load_scripts = function(files) {
-    var head = document.getElementsByTagName('head')[0],
-        ps = Util._pending_scripts;
+    var head = document.getElementsByTagName('head')[0], script,
+        ls = Util._loading_scripts, ps = Util._pending_scripts;
     for (var f=0; f<files.length; f++) {
-        var script = document.createElement('script');
+        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);
+        //console.log("loading script: " + script.src);
         script.onload = script.onreadystatechange = function (e) {
-            if (!this.readyState || 
-                this.readyState == 'complete' ||
-                this.readyState == 'loaded') {
-                this.onload = this.onreadystatechange = null;
+            while (ls.length > 0 && (ls[0].readyState === 'loaded' ||
+                                     ls[0].readyState === 'complete')) {
+                // For IE, append the script to trigger execution
+                var s = ls.shift();
+                //console.log("loaded script: " + s.src);
+                head.appendChild(s);
+            }
+            if (!this.readyState ||
+                (Util.Engine.presto && this.readyState === 'loaded') ||
+                this.readyState === 'complete') {
                 if (ps.indexOf(this) >= 0) {
-                    //console.log("loaded script: " + this.src);
+                    this.onload = this.onreadystatechange = null;
+                    //console.log("completed script: " + this.src);
                     ps.splice(ps.indexOf(this), 1);
-                }
-                // Call window.onscriptsload after last script loads
-                if (ps.length === 0 && window.onscriptsload) {
-                    window.onscriptsload();
+
+                    // Call window.onscriptsload after last script loads
+                    if (ps.length === 0 && window.onscriptsload) {
+                        window.onscriptsload();
+                    }
                 }
             }
+        };
+        // In-order script execution tricks
+        if (Util.Engine.trident) {
+            // For IE wait until readyState is 'loaded' before
+            // appending it which will trigger execution
+            // http://wiki.whatwg.org/wiki/Dynamic_Script_Execution_Order
+            ls.push(script);
+        } else {
+            // For webkit and firefox set async=false and append now
+            // https://developer.mozilla.org/en-US/docs/HTML/Element/script
+            script.async = false;
+            head.appendChild(script);
         }
+        ps.push(script);
     }
 }