Bug 132662

Summary:

AX: VoiceOver is ignoring live regions created after the document loads

Product:

WebKit

Reporter:

Dominic Mazzoni <dmazzoni>

Component:

Accessibility

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED DUPLICATE

Severity:

Normal

CC:

cfleizach, jcraig, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

528+ (Nightly build)

Hardware:

All

OS:

All

Attachments:

Description	Flags
Html that demonstrates the bug	none

Description Dominic Mazzoni 2014-05-07 14:01:42 PDT

The attached html file demonstrates the bug. In Safari 7.0.3 on OS X 10.9.2, when you add an additional live region to the page and then change its text, nothing is announced.

I was able to figure out a hacky workaround in Chromium that would probably work in WebKit/Mac too - if I remove the wrapper object for the root webarea node and recreate it, then fire a notification on it, that seems to trick VoiceOver into re-scanning the document for live regions and then it works correctly.

Does this look like a VoiceOver bug or is there a more proper fix that can be applied in WebKit?

Comment 1 Dominic Mazzoni 2014-05-07 14:02:17 PDT

Created attachment 231020 [details]
Html that demonstrates the bug

Comment 2 Radar WebKit Bug Importer 2014-05-07 14:02:24 PDT

<rdar://problem/16844111>

Comment 3 chris fleizach 2014-05-07 14:05:09 PDT

I haven't tried out your test case, but this may have been fixed with

        AX: Improve ARIA live region reliability by sending notifications when live regions are created/shown and hidden/destroyed
        https://bugs.webkit.org/show_bug.cgi?id=124381

Comment 4 Dominic Mazzoni 2014-05-07 14:51:35 PDT

You're right, that will probably solve it.

I can't find docs for NSAccessibilityLiveRegionCreatedNotification - can you tell me what OS X version added support for it?

Comment 5 chris fleizach 2014-05-07 14:55:25 PDT

(In reply to comment #4)
> You're right, that will probably solve it.
> 
> I can't find docs for NSAccessibilityLiveRegionCreatedNotification - can you tell me what OS X version added support for it?

It's a web only thing. It's just defined in WebCore as is

Comment 6 Dominic Mazzoni 2014-05-07 15:06:37 PDT

The example I uploaded still doesn't work correctly when I try today's WebKit Nightly on OS X 10.9.2, so I'm assuming that AXLiveRegionCreated will only be supported in a future version of VoiceOver.

Comment 7 chris fleizach 2014-05-07 15:26:57 PDT

(In reply to comment #6)
> The example I uploaded still doesn't work correctly when I try today's WebKit Nightly on OS X 10.9.2, so I'm assuming that AXLiveRegionCreated will only be supported in a future version of VoiceOver.

that is a fair assumption

Comment 8 James Craig 2014-05-28 13:05:22 PDT


*** This bug has been marked as a duplicate of bug 124381 ***