So, I spoke to the mozilla team and with some tweaks (as the shadow dom is
not visible) the absolute positioning information can be reflected in the
accessibility API. It will require some browser adjustments but we would do
this anyway for the shadow DOM. So, there is no need for scripting methods
to set the position other than through standard CSS functionality.
So, when focus is applied to a shadow DOM element a magnifier can zoom to
location.
Cynthia,
I am cc'ing you as this needs to go into the HTML 5 accessibility mapping
document when agreed upon.
Rich
Rich Schwerdtfeger
Distinguished Engineer, SWG Accessibility Architect/Strategist
James Craig
<jcraig@apple.com
> To
Sent by: Steven Faulkner
public-canvas-api <faulkner.steve@gmail.com>
-request@w3.org cc
public-canvas-api@w3.org
Subject
11/18/2009 08:26 Re: handling focus
PM
On Nov 17, 2009, at 2:56 AM, Steven Faulkner wrote:
> How do AT such as screen magnifiers provide focus highlighting of
interactive parts of the canvas if native focus is not provided?
> How are they able to follow and bring currently focused elements into the
viewport if there focus is not programmatically exposed provided?
That's can be done with standard CSS positioning on the interactive
elements in the shadow DOM. I'll update the proof-of-concept to include
that use case. I can't promise it before the U.S. Thanksgiving holiday
though.
Cheers,
James
