From f67705f4c95eb75b3aa0bf7cbe2b5175a9644a59 Mon Sep 17 00:00:00 2001
From: Jonas Smedegaard <dr@jones.dk>
Date: Wed, 9 Sep 2015 03:25:56 +0200
Subject: Initial draft.

---
 EventListener.js | 125 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 EventListener.js

(limited to 'EventListener.js')

diff --git a/EventListener.js b/EventListener.js
new file mode 100644
index 0000000..fa3423b
--- /dev/null
+++ b/EventListener.js
@@ -0,0 +1,125 @@
+// EventListener | MIT/GPL2 | github.com/jonathantneal/EventListener
+
+this.Element && Element.prototype.attachEvent && !Element.prototype.addEventListener && (function () {
+	function addToPrototype(name, method) {
+		Window.prototype[name] = HTMLDocument.prototype[name] = Element.prototype[name] = method;
+	}
+
+	// add
+	addToPrototype("addEventListener", function (type, listener) {
+		var
+		target = this,
+		listeners = target.addEventListener.listeners = target.addEventListener.listeners || {},
+		typeListeners = listeners[type] = listeners[type] || [];
+
+		// if no events exist, attach the listener
+		if (!typeListeners.length) {
+			target.attachEvent("on" + type, typeListeners.event = function (event) {
+				var documentElement = target.document && target.document.documentElement || target.documentElement || { scrollLeft: 0, scrollTop: 0 };
+
+				// polyfill w3c properties and methods
+				event.currentTarget = target;
+				event.pageX = event.clientX + documentElement.scrollLeft;
+				event.pageY = event.clientY + documentElement.scrollTop;
+				event.preventDefault = function () { event.returnValue = false };
+				event.relatedTarget = event.fromElement || null;
+				event.stopImmediatePropagation = function () { immediatePropagation = false; event.cancelBubble = true };
+				event.stopPropagation = function () { event.cancelBubble = true };
+				event.target = event.srcElement || target;
+				event.timeStamp = +new Date;
+
+				// create an cached list of the master events list (to protect this loop from breaking when an event is removed)
+				for (var i = 0, typeListenersCache = [].concat(typeListeners), typeListenerCache, immediatePropagation = true; immediatePropagation && (typeListenerCache = typeListenersCache[i]); ++i) {
+					// check to see if the cached event still exists in the master events list
+					for (var ii = 0, typeListener; typeListener = typeListeners[ii]; ++ii) {
+						if (typeListener == typeListenerCache) {
+							typeListener.call(target, event);
+
+							break;
+						}
+					}
+				}
+			});
+		}
+
+		// add the event to the master event list
+		typeListeners.push(listener);
+	});
+
+	// remove
+	addToPrototype("removeEventListener", function (type, listener) {
+		var
+		target = this,
+		listeners = target.addEventListener.listeners = target.addEventListener.listeners || {},
+		typeListeners = listeners[type] = listeners[type] || [];
+
+		// remove the newest matching event from the master event list
+		for (var i = typeListeners.length - 1, typeListener; typeListener = typeListeners[i]; --i) {
+			if (typeListener == listener) {
+				typeListeners.splice(i, 1);
+
+				break;
+			}
+		}
+
+		// if no events exist, detach the listener
+		if (!typeListeners.length && typeListeners.event) {
+			target.detachEvent("on" + type, typeListeners.event);
+		}
+	});
+
+	// dispatch
+	addToPrototype("dispatchEvent", function (eventObject) {
+		var
+		target = this,
+		type = eventObject.type,
+		listeners = target.addEventListener.listeners = target.addEventListener.listeners || {},
+		typeListeners = listeners[type] = listeners[type] || [];
+
+		try {
+			return target.fireEvent("on" + type, eventObject);
+		} catch (error) {
+			if (typeListeners.event) {
+				typeListeners.event(eventObject);
+			}
+
+			return;
+		}
+	});
+
+	// CustomEvent
+	Object.defineProperty(Window.prototype, "CustomEvent", {
+		get: function () {
+			var self = this;
+
+			return function CustomEvent(type, eventInitDict) {
+				var event = self.document.createEventObject(), key;
+
+				event.type = type;
+				for (key in eventInitDict) {
+					if (key == 'cancelable'){
+						event.returnValue = !eventInitDict.cancelable;
+					} else if (key == 'bubbles'){
+						event.cancelBubble = !eventInitDict.bubbles;
+					} else if (key == 'detail'){
+						event.detail = eventInitDict.detail;
+					}
+				}
+				return event;
+			};
+		}
+	});
+
+	// ready
+	function ready(event) {
+		if (ready.interval && document.body) {
+			ready.interval = clearInterval(ready.interval);
+
+			document.dispatchEvent(new CustomEvent("DOMContentLoaded"));
+		}
+	}
+
+	ready.interval = setInterval(ready, 1);
+
+	window.addEventListener("load", ready);
+})();
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