diff lib/GeoTemCo/js/Build/Loader/DynaJsLoader.js @ 0:b57c7821382f

initial
author Dirk Wintergruen <dwinter@mpiwg-berlin.mpg.de>
date Thu, 28 May 2015 10:28:12 +0200
parents
children
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/GeoTemCo/js/Build/Loader/DynaJsLoader.js	Thu May 28 10:28:12 2015 +0200
@@ -0,0 +1,105 @@
+/*
+* DynaJsLoader.js
+*
+* Copyright (c) 2012, Stefan Jänicke. All rights reserved.
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation; either
+* version 3 of the License, or (at your option) any later version.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+* MA 02110-1301  USA
+*/
+
+/**
+ * Dynamic Script Loader for GeoTemCo
+ * @author Stefan Jänicke (stjaenicke@informatik.uni-leipzig.de)
+ * @release 1.0
+ * @release date: 2012-07-27
+ * @version date: 2012-07-27
+ */
+function DynaJsLoader() {
+
+	this.checkInterval = 20;
+	this.loadAttempts = 2000;
+
+	this.loadScripts = function(scripts, callback) {
+
+		if (scripts.length > 0) {
+			this.scriptStack = scripts;
+			this.scriptIndex = 0;
+			this.loadScript(callback);
+		}
+
+	};
+
+	this.loadScript = function(callback) {
+
+		var loader = this;
+		if (this.scriptIndex < this.scriptStack.length) {
+
+			var scriptEmbedded = false, scriptLoaded = false, iter = 0;
+			var scriptData = this.scriptStack[this.scriptIndex];
+			this.scriptIndex++;
+			var testFunction = scriptData.test;
+			var test = function() {
+				scriptEmbedded = true;
+				if (!testFunction || typeof (eval(testFunction)) === 'function') {
+					scriptLoaded = true;
+				} else {
+					setTimeout(function() {
+						test();
+					}), loader.checkInterval
+				}
+			}
+			var head = document.getElementsByTagName('head')[0];
+			var script = document.createElement('script');
+			script.type = 'text/javascript';
+			script.src = scriptData.url;
+
+			script.onload = test;
+			script.onreadystatechange = function() {
+				if (this.readyState == 'complete') {
+					test();
+				}
+			}
+
+			head.appendChild(script);
+
+			var checkStatus = function() {
+				if (scriptEmbedded && scriptLoaded) {
+					loader.loadScript(callback);
+					if ( typeof console != 'undefined') {
+						console.log(scriptData.url + " loaded in " + (iter * loader.checkInterval) + " ms");
+					}
+				} else {
+					iter++;
+					if (iter > loader.loadAttempts) {
+						if ( typeof console != 'undefined') {
+							console.log("MapTimeView not loaded: Not able to load " + scriptData.url + "!");
+							Publisher.Publish('StifReady', null);
+						}
+						return;
+					}
+					setTimeout(function() {
+						checkStatus();
+					}), loader.checkInterval
+				}
+			}
+			checkStatus();
+
+		} else if (callback) {
+			callback();
+		}
+
+	};
+
+};