ISSUE-633 Changes ready for final review

Here is a High-level summary of the issue 633 changes contained in branch
mck_issue633[1] that are ready for final review.

 

1. Revised grid role description to explain how grid can be used to provide
arrow key navigation and flexible layout for sets of interactive elements,
such as links and buttons. The revisions also clarify focus management and
the purpose of readonly in grids.

 

2. Updated treegrid role to include new language about the readonly state
from the revised grid role.

 

3. Added articlefeed role so screen reader users can stay in reading mode
while reading and scrolling through infinitely scrolling sources of
information.

 

4. Modified article role to support aria-setsize and aria-posinset when the
article is contained in an articlefeed.

 

5. Modified aria-busy to clarify its purpose and add support for the
articlefeed role.

 

The above is a reduced set of the original proposal. It does not resolve all
aspects of issue 633, but covers all the most pressing use cases.

 

I will put more detail into tracker in issue 633 and action 1505 when I
close them.

 

[1] http://rawgit.com/w3c/aria/mck_issue633/aria/aria.html

 

Matt King