[Webkit-unassigned] [Bug 155554] AX: attributes to retrieve focusable and editable ancestors

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=155554

--- Comment #13 from Doug Russell <d_russell at apple.com> ---
(In reply to comment #12)
> (In reply to comment #11)
> > (In reply to comment #10)
> > > (In reply to comment #9)
> > > > Created attachment 274244 [details]
> > > > Patch
> > > 
> > > what is the purpose of this patch? what will it be used for?
> > > 
> > > this looks like it also add a lot of extra cycles to web retrieval, if these
> > > are now three new attributes on every element, that will run up the parent
> > > chain independently for every call
> > 
> > The purpose is to simplify the logic that decides if a focus change should
> > be alerted to a user or if we've simply moved between focusable subelements.
> 
> and that is happening inside VoiceOver now?

VoiceOver currently uses some unreliable heuristics based on roles and frames that this is meant to replace.

> 
> Will VO fetch these on demand or automatically for all elements?

Only on demand.

I think the only place where this is adding overhead is in the list of supported attributes growing by three entries and a couple more if statements in accessibilityAttributeValue

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