[whatwg] Entering fullscreen when already in fullscreen mode [was: Fullscreen]

Darin Fisher darin at chromium.org
Mon Oct 17 16:52:03 PDT 2011

On Mon, Oct 17, 2011 at 4:17 PM, Anne van Kesteren <annevk at opera.com> wrote:

> On Tue, 18 Oct 2011 07:55:33 +0900, Darin Fisher <darin at chromium.org>
> wrote:
>> Thanks for working on this spec!  I have more questions, but I'll just
>> start with one.  If enterFullscreen() is called when the browsing context is
>> already being displayed fullscreen, what should happen?  (It looks like
>> Safari 5.1 ignores the second call to webkitRequestFullScreen.)
> Chris is suggesting this should move the "current fullscreen element"
> around. A use case I can think of is where you have YouTube fullscreen while
> browsing through videos and then want to highlight a particular video. It
> does however generate quite a bit of complexity in edge cases where you have
> a tree of Documents. In that case you need to find the common ancestor of
> the current fullscreen element and the new fullscreen element, make changes
> to the Documents on that path from current to new, and dispatch events.

This seems like it might be overly complicated.  I could be mistaken, but I
don't think YouTube needs this.

>  I also find it curious that there is a bit of a dead-time between the
>> request to enter fullscreen and the fullscreenchange event (nit:
>> "fullscreenchange" instead of "fullscreenchanged" to be consistent,
>> right?).
> Agreed that it should be ending in "change".


>  It appears that JS cannot request to cancel out of fullscreen mode until
>> the fullscreenchange event is generated (i.e., until the fullscreen flag
>> is set).  It could cause pain for developers if there is no guaranteed
>> response to enterFullscreen().  Did my request succeed, did it fail?  What
>> happened?
> The idea is to have an event, also asynchronous, that is dispatched when
> the invocation did not succeed. Naming ideas so far: "fullscreendeny" and
> "fullscreenerror".

I see.  Naming is hard :-(  I'll give a small vote for fullscreenerror.


> --
> Anne van Kesteren
> http://annevankesteren.nl/

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