[Webkit-unassigned] [Bug 25690] Drop event is never fired when dragover's target element is removed even if the event was canceled by its ancestor

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=25690





--- Comment #19 from Daniel Cheng <dcheng at chromium.org>  2013-02-04 11:09:34 PST ---
(In reply to comment #18)
> (In reply to comment #17)
> 
> > > ondragenter should also return false.
> > 
> > Not in WebKit.
> 
> Really?  It's required by HTML5.  The standard _does not_ say that a dragenter event must be followed by a dragover event, but it does say that their default actions must be cancelled to permit a subsequent drop event.
> 
> So the event sequence dragenter -> {dragleave|drop} is permitted per spec, but the drop should be generated only if the default action of dragenter event was cancelled.

I've spent a considerable amount of time trying to get the D&D event handling to follow the HTML spec (especially wrt cancelling the dragenter/dragover events), and it's rather tricky (often times, it only fails for one specific type of element).

I'll try to take a look at this in the next few weeks, but I have quite a lot of other things on my plate atm.

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