[whatwg] allowfullscreen vs sandbox="allow-fullscreen", and mimicking for pointer lock

[Adam Barth]

It's not clear to me from the spec how the allowfullscreen attribute
works.  It appears to be mentioned only in the security and privacy
considerations section.  For example, suppose I have three frames:

Main frame: a.html
  -> <iframe src="b.html">
    -> <iframe src="c.html" allowfullscreen>

Can c.html go full screen?  Where is that specified?

Adam


On Tue, Jul 31, 2012 at 3:26 PM, Adam Barth <w3c at adambarth.com> wrote:
> It looks like the ability to go full screen is off-by-default and then
> enabled via the attribute.  If we used iframe at sandbox, the ability
> would be on-by-default for non-sandboxed iframes.
>
> Adam
>
>
> On Tue, Jul 31, 2012 at 3:11 PM, Vincent Scheib <scheib at google.com> wrote:
>> [correcting Anne van Kesteren's email]
>>
>>
>> On Tue, Jul 31, 2012 at 3:03 PM, Vincent Scheib <scheib at google.com> wrote:
>>
>>> I'm currently implementing Pointer Lock [1] in WebKit, which was adjusted
>>> recently to mimic Fullscreen [2].
>>>
>>> Why does the Fullscreen specification use an iframe attribute
>>> allowfullscreen to permit/restrict iframe capabilities instead of using
>>> iframe sandbox="allow-fullscreen"?
>>>
>>> [1] http://dvcs.w3.org/hg/pointerlock/raw-file/default/index.html
>>> [2] http://dvcs.w3.org/hg/fullscreen/raw-file/tip/Overview.html
>>>
>>>