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Re: Generated CSS content and browser/assistive technology compatibility

From: Marco Zehe <mzehe@mozilla.com>
Date: Fri, 10 Oct 2014 09:02:35 +0200
Message-ID: <5437848B.1090401@mozilla.com>
To: James Nurthen <james.nurthen@oracle.com>, Dominic Mazzoni <dmazzoni@google.com>
CC: W3C WAI Protocols & Formats <public-pfwg@w3.org>
That is correct, JAWS is doing its own HTML parsing, like in IE, and is
not using the info from the accessibility tree. Neither is Window-Eyes
if that still has any relevance.

Frustrating, I know, but from our end, there's nothing we could do
except cut all support for ISimpleDOM, but that would leave all JAWS
users in the dark for an indeterminable amount of time. ;)

Marco

On 09.10.2014 20:13, James Nurthen wrote:
> I note that FF is exposing it in the accessibility tree too.
>
> I guess JAWS isn't using the accessibility tree for text as JAWS won't
> read it with FF.
>
> Regards,
> James
>
> On 10/9/2014 11:05 AM, Dominic Mazzoni wrote:
>> Works fine in Chrome too, presumably with any assistive technology
>> since we're exposing the generated content in the accessibility tree.
>>
>> On Thu, Oct 9, 2014 at 10:58 AM, James Nurthen
>> <james.nurthen@oracle.com <mailto:james.nurthen@oracle.com>> wrote:
>>
>>     I just tested with NVDA and Firefox 31 and it seemed to be read
>>     correctly in this combination too.
>>
>>
>>
>>     On 10/9/2014 10:51 AM, Gunderson, Jon R wrote:
>>>     James,
>>>
>>>     Thank you for the code sample.
>>>
>>>     At this point the only known place generated CSS content works with assistive technology is Safari/Voice Over or are there other combinations you are aware of?
>>>
>>>     Jon
>>>
>>>
>>>     -----Original Message-----
>>>     From: James Craig [mailto:jcraig@apple.com] 
>>>     Sent: Thursday, October 09, 2014 12:28 PM
>>>     To: Gunderson, Jon R
>>>     Cc: Ted O'Connor; W3C WAI Protocols & Formats
>>>     Subject: Re: CSS flexbox
>>>
>>>>     On Oct 9, 2014, at 6:34 AM, Gunderson, Jon R <jongund@illinois.edu> <mailto:jongund@illinois.edu> wrote:
>>>>
>>>>     Is there a way through a W3C DOM interface to identify this generated content?
>>>     CSSOM not DOM:
>>>     var pseudoBefore = window.getComputedStyle(myElement, "::before"); var genContent = pseudoBefore.getPropertyValue("alt") || pseudoBefore.getPropertyValue("-webkit-alt") || pseudoBefore.getPropertyValue("content");
>>>
>>>     If "content" returned an image URL string, you'd have to further parse to determine if there was a useful text alternative, or maybe the text or speak-as value of the counter if the content of the pseudo-element was a counter. [1]
>>>
>>>     >From the spec:
>>>>>     If pseudoElt is as an ASCII case-insensitive match for either ':before' or '::before' let obj be the ::before pseudo-element of elt.
>>>>>     If pseudoElt is as an ASCII case-insensitive match for either ':after' or '::after' let obj be the ::after pseudo-element of elt.
>>>     http://dev.w3.org/csswg/cssom/#dom-window-getcomputedstyle
>>>     http://dev.w3.org/csswg/cssom/#dom-cssstyledeclaration-getpropertyvalue
>>>
>>>     Cheers,
>>>     James
>>>
>>>     1. http://lists.w3.org/Archives/Public/www-style/2014May/thread.html#msg146
>>>
>>>
>>>
>>
>>     -- 
>>     Regards, James
>>
>>     Oracle <http://www.oracle.com>
>>     James Nurthen | Principal Engineer, Accessibility
>>     Phone: +1 650 506 6781 <tel:+1%20650%20506%206781> | Mobile: +1
>>     415 987 1918 <tel:+1%20415%20987%201918>
>>     Oracle Corporate Architecture
>>     500 Oracle Parkway | Redwood City, CA 94065
>>     Green Oracle <http://www.oracle.com/commitment> Oracle is
>>     committed to developing practices and products that help protect
>>     the environment
>>
>>
>
> -- 
> Regards, James
>
> Oracle <http://www.oracle.com>
> James Nurthen | Principal Engineer, Accessibility
> Phone: +1 650 506 6781 <tel:+1%20650%20506%206781> | Mobile: +1 415
> 987 1918 <tel:+1%20415%20987%201918>
> Oracle Corporate Architecture
> 500 Oracle Parkway | Redwood City, CA 94065
> Green Oracle <http://www.oracle.com/commitment> Oracle is committed to
> developing practices and products that help protect the environment
>
Received on Friday, 10 October 2014 07:03:05 UTC

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