[Accessibility-ia2] Mapping of aria-errormessage for ATK/AT-SPI2 and IA2

[Joanmarie Diggs]

Hey Jamie.

Yeah, we have a description property which is a string. Right now, I
don't have a strong feeling either way about whether aria-errormessage's
text belongs as part of that value. So if you think it should be there
in addition to exposed via the relationship pair, I don't mind.

--joanie

On 02/23/2016 06:03 PM, James Teh wrote:
> Sounds great. I'm happy with this mapping.
> 
> Would this message be included in the concatenated description string
> for an object? I'm not sure if ATK has this, but in MSAA (and thus IA2),
> you can call the accDescription property and it provides the description
> as a string. Right now, that would include the text of anything listed
> in aria-describedby. I think it *should* include the error message myself.
> 
> Jamie
> 
> On 24/02/2016 5:42 AM, Joanmarie Diggs wrote:
>> Hey all.
>>
>> We need to map aria-errormessage on the various platforms, including
>> ATK/AT-SPI2 and IA2. Given the ongoing desire for cross-platform
>> homogeneity, I'll toss out what I was thinking for my platform for
>> consideration by IA2 folks.
>>
>> Proposal: Connect the message to the element with the error via the
>> RELATION_DESCRIBED_BY/RELATION_DESCRIPTION_FOR relation pair and expose
>> "errormessage" as an object attribute.
>>
>> Rationale:
>>
>> 1. An error message provides descriptive information about an object.
>>
>> 2. Exposure via a relation eliminates the need to tree dive to find
>>     the error.
>>
>> 3. Accessible relations can have multiple targets, so this exposure
>>     does not stomp on a non-error description while at the same time
>>     eliminating the need for each platform to create a new relation
>>     type(s).
>>
>> 4. The object attribute is needed to identify which target (if any)
>>     is an error message.
>>
>> Thoughts?
>> --joanie
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>