163269 - Make form controls not override HandleDOMEvent

Status: NEW

(Core :: Layout: Form Controls, defect, P3)

Description

[John Keiser (jkeiser)]

Form controls currently override HandleDOMEvent to process certain events and
this makes the code more complicated and error-prone.  There are several options:

(1) Make form controls be listeners on themselves
(2) Make the document receive the event and look at the type of the target
(3) Add a DefaultAction() method that is called on every element in a separate
stage in HandleDOMEvent()
(4) Make a special listener that listens for certain events on all elements and
calls DefaultAction on elements when this happens

#1 is bloat, #2 seems messy to me, and #3 joki didn't like when I last talked to
him.  #4 doesn't mess up HandleDOMEvent but does the same thing as #3; perhaps
it's worth looking into.

Comment 1

[John Keiser (jkeiser)]

One more complete plan is to have elements be receivers of events (like through
DefaultEvent() or HandleEvent() or something) and *not* dispatchers.  Have ESM
or somebody else do the dispatching, bubbling, capturing, etc.

bryner has expressed an interest in this idea as well.  Probably there will be a
bigger metabug to address that issue.