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| addListener: function(element, eventName, fn, scope, options) {
// Check if we've been passed a "config style" event.
if (typeof eventName !== 'string') {
EventManager.prepareListenerConfig(element, eventName);
return;
}
var dom = element.dom || Ext.getDom(element),
hasAddEventListener, bind, wrap, cache, id, cacheItem, capture;
if (typeof fn === 'string') {
fn = Ext.resolveMethod(fn, scope || element);
}
if (!fn) {
Ext.Error.raise({
sourceClass: 'Ext.EventManager',
sourceMethod: 'addListener',
targetElement: element,
eventName: eventName,
msg: 'Error adding "' + eventName + '\" listener. The handler function is undefined.'
});
}
// create the wrapper function
options = options || {};
bind = EventManager.normalizeEvent(eventName, fn);
wrap = EventManager.createListenerWrap(dom, eventName, bind.fn, scope, options);
// add all required data into the event cache
cache = EventManager.getEventListenerCache(element.dom ? element : dom, eventName);
eventName = bind.eventName;
// In IE9 we prefer to use attachEvent but it's not available for some Elements (SVG)
hasAddEventListener = supportsAddEventListener || (Ext.isIE9 && !dom.attachEvent);
if (!hasAddEventListener) {
id = EventManager.normalizeId(dom);
// If there's no id we don't have any events bound, so we never
// need to clone at this point.
if (id) {
cacheItem = Ext.cache[id][eventName];
if (cacheItem && cacheItem.firing) {
// If we're in the middle of firing we want to update the class
// cache reference so it is different to the array we referenced
// when we started firing the event. Though this is a more difficult
// way of not mutating the collection while firing, a vast majority of
// the time we won't be adding listeners for the same element/event type
// while firing the same event.
cache = EventManager.cloneEventListenerCache(dom, eventName);
}
}
}
capture = !!options.capture;
cache.push({
fn: fn,
wrap: wrap,
scope: scope,
capture: capture
});
if (!hasAddEventListener) {
// If cache length is 1, it means we're binding the first event
// for this element for this type
if (cache.length === 1) {
id = EventManager.normalizeId(dom, true);
fn = Ext.Function.bind(EventManager.handleSingleEvent, EventManager, [id, eventName], true);
Ext.cache[id][eventName] = {
firing: false,
fn: fn
};
dom.attachEvent('on' + eventName, fn);
}
} else {
dom.addEventListener(eventName, wrap, capture);
}
if (dom == doc && eventName == 'mousedown') {
EventManager.stoppedMouseDownEvent.addListener(wrap);
}
}, |
