livehack.js

steal('jquery/event').then(function() {

	var event = jQuery.event,

		//helper that finds handlers by type and calls back a function, this is basically handle
		// events - the events object
		// types - an array of event types to look for
		// callback(type, handlerFunc, selector) - a callback
		// selector - an optional selector to filter with, if there, matches by selector
		//     if null, matches anything, otherwise, matches with no selector
		findHelper = function( events, types, callback, selector ) {
			var t, type, typeHandlers, all, h, handle, 
				namespaces, namespace,
				match;
			for ( t = 0; t < types.length; t++ ) {
				type = types[t];
				all = type.indexOf(".") < 0;
				if (!all ) {
					namespaces = type.split(".");
					type = namespaces.shift();
					namespace = new RegExp("(^|\\.)" + namespaces.slice(0).sort().join("\\.(?:.*\\.)?") + "(\\.|$)");
				}
				typeHandlers = (events[type] || []).slice(0);

				for ( h = 0; h < typeHandlers.length; h++ ) {
					handle = typeHandlers[h];
					
					match = (all || namespace.test(handle.namespace));
					
					if(match){
						if(selector){
							if (handle.selector === selector  ) {
								callback(type, handle.origHandler || handle.handler);
							}
						} else if (selector === null){
							callback(type, handle.origHandler || handle.handler, handle.selector);
						}
						else if (!handle.selector ) {
							callback(type, handle.origHandler || handle.handler);
							
						} 
					}
					
					
				}
			}
		};

	/**
	 * Finds event handlers of a given type on an element.
	 * @param {HTMLElement} el
	 * @param {Array} types an array of event names
	 * @param {String} [selector] optional selector
	 * @return {Array} an array of event handlers
	 */
	event.find = function( el, types, selector ) {
		var events = ( $._data(el) || {} ).events,
			handlers = [],
			t, liver, live;

		if (!events ) {
			return handlers;
		}
		findHelper(events, types, function( type, handler ) {
			handlers.push(handler);
		}, selector);
		return handlers;
	};
	/**
	 * Finds all events.  Group by selector.
	 * @param {HTMLElement} el the element
	 * @param {Array} types event types
	 */
	event.findBySelector = function( el, types ) {
		var events = $._data(el).events,
			selectors = {},
			//adds a handler for a given selector and event
			add = function( selector, event, handler ) {
				var select = selectors[selector] || (selectors[selector] = {}),
					events = select[event] || (select[event] = []);
				events.push(handler);
			};

		if (!events ) {
			return selectors;
		}
		//first check live:
		/*$.each(events.live || [], function( i, live ) {
			if ( $.inArray(live.origType, types) !== -1 ) {
				add(live.selector, live.origType, live.origHandler || live.handler);
			}
		});*/
		//then check straight binds
		findHelper(events, types, function( type, handler, selector ) {
			add(selector || "", type, handler);
		}, null);

		return selectors;
	};
	event.supportTouch = "ontouchend" in document;
	
	$.fn.respondsTo = function( events ) {
		if (!this.length ) {
			return false;
		} else {
			//add default ?
			return event.find(this[0], $.isArray(events) ? events : [events]).length > 0;
		}
	};
	$.fn.triggerHandled = function( event, data ) {
		event = (typeof event == "string" ? $.Event(event) : event);
		this.trigger(event, data);
		return event.handled;
	};
	/**
	 * Only attaches one event handler for all types ...
	 * @param {Array} types llist of types that will delegate here
	 * @param {Object} startingEvent the first event to start listening to
	 * @param {Object} onFirst a function to call 
	 */
	event.setupHelper = function( types, startingEvent, onFirst ) {
		if (!onFirst ) {
			onFirst = startingEvent;
			startingEvent = null;
		}
		var add = function( handleObj ) {

			var bySelector, selector = handleObj.selector || "";
			if ( selector ) {
				bySelector = event.find(this, types, selector);
				if (!bySelector.length ) {
					$(this).delegate(selector, startingEvent, onFirst);
				}
			}
			else {
				//var bySelector = event.find(this, types, selector);
				if (!event.find(this, types, selector).length ) {
					event.add(this, startingEvent, onFirst, {
						selector: selector,
						delegate: this
					});
				}

			}

		},
			remove = function( handleObj ) {
				var bySelector, selector = handleObj.selector || "";
				if ( selector ) {
					bySelector = event.find(this, types, selector);
					if (!bySelector.length ) {
						$(this).undelegate(selector, startingEvent, onFirst);
					}
				}
				else {
					if (!event.find(this, types, selector).length ) {
						event.remove(this, startingEvent, onFirst, {
							selector: selector,
							delegate: this
						});
					}
				}
			};
		$.each(types, function() {
			event.special[this] = {
				add: add,
				remove: remove,
				setup: function() {},
				teardown: function() {}
			};
		});
	};
});