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Re: Clarification sought regarding aria-setsize and aria-posinset

From: Alexander Surkov <surkov.alexander@gmail.com>
Date: Tue, 11 Mar 2014 14:25:44 -0400
Message-ID: <CA+epNsemmnZXS0PBmjgdcx6nHWo1oh=Thoqk44ufS6uBn3wdJA@mail.gmail.com>
To: Joseph Scheuhammer <clown@alum.mit.edu>
Cc: Joanmarie Diggs <jdiggs@igalia.com>, "W3C WAI Protocols & Formats" <public-pfwg@w3.org>
That's right. IA2 uses groupPosition. In ATK case Firefox exposes those
properties as level, posinset and setsize object attributes.


On Tue, Mar 11, 2014 at 10:31 AM, Joseph Scheuhammer <clown@alum.mit.edu>wrote:

> Hi Joanie,
>
> Not a complete reply, but the end of your message reminded me of a feature
> in IA2.
>
>
> You wrote:
>
>  I think what the improvements to ATK (and in turn AT-SPI2) may be is two
>> new methods:
>>
>> a. get_set_size()
>> b. get_position_in_set()
>>
>> Seems like that would be a more reliable -- and implementation-agnostic
>> -- way for ATs to get the needed information to pass along to end users.
>>
>> Related aside: Are the ATs on other platforms having to play a similar
>> game of "go fish" when trying to present things like set size and
>> position in set?
>>
>
> That's similar to IAccessible2::groupPosition() [1] which retrieves the
> level (think hierarchy), group size, and position in a group.  This is how
> aria-level, aria-setsize, and aria-posinset are exposed using MSAA+IA2 [2].
>
> A quick (very!) web search reveals that NVDA (likely) uses it [3].
>
> [1] http://accessibility.linuxfoundation.org/a11yspecs/
> ia2/docs/html/interface_i_accessible2.html#a94d4d84e000ef2fa3f2abf1148779
> 941
> [2] http://www.w3.org/WAI/PF/aria-implementation/#mapping_group_position
> [3] http://community.nvda-project.org/ticket/77
>
>
> --
> ;;;;joseph.
>
>
> 'A: After all, it isn't rocket science.'
> 'K: Right. It's merely computer science.'
>              - J. D. Klaun -
>
>
>
Received on Tuesday, 11 March 2014 18:26:11 UTC

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