function bindEventDelegate(editor, eventName) {
		var eventRootElm = getEventTarget(editor, eventName), delegate;

		function isListening(editor) {
			return !editor.hidden && !editor.readonly;
		}

		if (!editor.delegates) {
			editor.delegates = {};
		}

		if (editor.delegates[eventName]) {
			return;
		}

		if (editor.settings.event_root) {
			if (!customEventRootDelegates) {
				customEventRootDelegates = {};
				editor.editorManager.on('removeEditor', function() {
					var name;

					if (!editor.editorManager.activeEditor) {
						if (customEventRootDelegates) {
							for (name in customEventRootDelegates) {
								editor.dom.unbind(getEventTarget(editor, name));
							}

							customEventRootDelegates = null;
						}
					}
				});
			}

			if (customEventRootDelegates[eventName]) {
				return;
			}

			delegate = function(e) {
				var target = e.target, editors = editor.editorManager.editors, i = editors.length;

				while (i--) {
					var body = editors[i].getBody();

					if (body === target || DOM.isChildOf(target, body)) {
						if (isListening(editors[i])) {
							editors[i].fire(eventName, e);
						}
					}
				}
			};

			customEventRootDelegates[eventName] = delegate;
			DOM.bind(eventRootElm, eventName, delegate);
		} else {
			delegate = function(e) {
				if (isListening(editor)) {
					editor.fire(eventName, e);
				}
			};

			DOM.bind(eventRootElm, eventName, delegate);
			editor.delegates[eventName] = delegate;
		}
	}
Binds a event delegate for the specified name this delegate will fire
the event to the editor dispatcher.

@private
@param {tinymce.Editor} editor Editor instance to get event target from.
@param {String} eventName Name of the event for example "click".