1 files changed, 51 insertions, 4 deletions
diff --git a/js/globals.js b/js/globals.js
index 1dad0dc..29f62c5 100644
--- a/js/globals.js
+++ b/js/globals.js
@@ -4,11 +4,58 @@ function _(str) { /* getText */
 }
 
 if (typeof String.prototype.endsWith !== 'function') {
-    String.prototype.endsWith = function(suffix) {
-        return this.indexOf(suffix, this.length - suffix.length) !== -1;
-    };
+	String.prototype.endsWith = function(suffix) {
+		return this.indexOf(suffix, this.length - suffix.length) !== -1;
+	};
+}
+
+if (!String.prototype.trim) {
+	String.prototype.trim = function() {
+		return this.match(/^\s*([\s\S]*?)\s*$/)[1];
+	}
+}
+
+if (!String.trim) {
+	String.trim = function(obj) { return String.prototype.trim.call(obj);}
+}
+
+if (!Object.create) {
+	Object.create = function (o) {
+		if (arguments.length > 1) { throw new Error("Object.create polyfill only accepts the first parameter"); }
+		var tmp = function() {};
+		tmp.prototype = o;
+		return new tmp();
+	};
 }
 
 var DATATYPES = false;
 var LOCALE = {};
-var SQL = {};
+var SQL = {
+	_subscribers: {},
+	
+	publish: function(message, publisher, data) {
+		var subscribers = this._subscribers[message] || [];
+		var obj = {
+			target: publisher,
+			data: data
+		}
+		subscribers.forEach(function(subscriber) { subscriber(obj); });
+	},
+	
+	subscribe: function(message, subscriber) {
+		if (!(message in this._subscribers)) {
+			this._subscribers[message] = [];
+		}
+		var index = this._subscribers[message].indexOf(subscriber);
+		if (index == -1) { this._subscribers[message].push(subscriber); }
+	},
+	
+	unsubscribe: function(message, subscriber) {
+		var index = this._subscribers[message].indexOf(subscriber);
+		if (index > -1) { this._subscribers[message].splice(index, 1); }
+	}
+}
+
+window.onbeforeunload = function(e) {
+	return ""; /* some browsers will show this text, some won't. */
+}