No, prototype's methods for working with events' cache are completely
private.
I really doubt you can access them, but extending Event.observe seems
like a perfect solution.
Something like this should work, though I haven't tested thoroughly:
Element.addMethods({
observe: Element.Methods.observe.wrap(
function(proceed, element, eventName, handler) {
element = $(element);
Event._cache = Event._cache || { };
Event._cache[eventName] = Event._cache[eventName] || [];
Event._cache[eventName].push(handler);
return proceed(element, eventName, handler);
})
})
element.observe('click', function(){ alert('foo') });
element.observe('click', function(){ alert('bar') });
Event._cache.click; // [function(), function()] <== these are your
handlers for 'click' event
Event._cache.click[0](); // alerts 'foo' <== this is your first
handler
Event._cache.click[1](); // alerts 'bar' <== this is a second one
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