[whatwg] "fullscreenchange" event should be delayed to after transition is complete
cpearce at mozilla.com
Wed May 16 23:06:22 PDT 2012
On 17/05/2012 3:37 a.m., Anne van Kesteren wrote:
> On Wed, May 16, 2012 at 2:33 AM, Chris Pearce<cpearce at mozilla.com> wrote:
>> I think that the "fullscreenchange" even dispatch should be specified to be
>> dispatched once the animation to transition to/from fullscreen has finished.
> So queuing the task was not enough? I guess that makes sense.
> As for how to best define this in the specification. Should I just
> create a list of objects the event is to be dispatched upon and then
> after the animation steps start queuing tasks to dispatch them on the
> objects in that list?
Actually after thinking a bit more on this I've changed my mind and I
don't think it's ok to leave the fullscreenElement stack and :fullscreen
state changes synchronous while delaying the dispatch of
If fullscreenElement stack and :fullscreen state changes could be
observed before the fullscreen transition/animation is complete, script
won't see consistent behaviour across platforms, i.e. on some (but not
all) platforms there will be a period of time that
document.fullscreenElement is true but document.fullscreenElement
doesn't take up the entire screen.
I think it would be best to simply make everything from Step 2 onwards
of the requestFullscreen() algorithm spec asynchronous. So in the
requestFullscreen specification, move Step 5 and Step 6 up to be
inserted before Step 2.
We should do the same with exitFullscreen(), i.e. move Step 6 and Step 7
of the exitFullscreen algorithm spec up to be inserted before Step 3.
We should also specify that those state changes happen in synchronous
sections, to keep the world sane.
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