--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/GeoTemCo/js/Util/Publisher.js	Thu May 28 10:28:12 2015 +0200
@@ -0,0 +1,75 @@
+/*
+* Dropdown.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
+*/
+
+/**
+ * @class Publisher
+ * Publish/Subscribe mechanism
+ * @author Stefan Jänicke (stjaenicke@informatik.uni-leipzig.de)
+ * @release 1.0
+ * @release date: 2012-07-27
+ * @version date: 2012-07-27
+ */
+if ( typeof Publisher == 'undefined') {
+
+	Publisher = function() {
+
+		var topics = [];
+
+		this.Get = function(topic) {
+			var value = topics[topic];
+			if (!value || !(value instanceof Array)) {
+				value = topics[topic] = [];
+			}
+			return value;
+		};
+
+		this.Publish = function(topic, data, publisher) {
+			var subscribers = this.Get(topic);
+			for (var i = 0; i < subscribers.length; i++) {
+				if (publisher == null || subscribers[i].client != publisher) {
+					subscribers[i].callback(data);
+				}
+			}
+		};
+
+		this.Subscribe = function(topic, subscriber, callback) {
+			var subscribers = this.Get(topic);
+			subscribers.push({
+				client : subscriber,
+				callback : callback
+			});
+		};
+
+		this.Unsubscribe = function(topic, unsubscriber) {
+			var subscribers = this.Get(topic);
+			for (var i = 0; i < subscribers.length; i++) {
+				if (subscribers[i].client == unsubscriber) {
+					subscribers.splice(i, 1);
+					return;
+				}
+			}
+		};
+
+		return this;
+
+	}();
+
+}