Re: Instantiating Firefox A11y on GNOME

[Ginn Chen <Ginn Chen Sun COM>]

On Jan 20, 2009, at 10:57 PM, Brad Taylor wrote:

> Hey Ginn,
>
> > I've tested on Ubuntu 8.10, the patch v3 in bmo #460926 works for
> > Firefox 3.0.5 along with the atk-bridge change.
> >
> > To make sure atk-bridge was updated correctly, you can download a
> > nightly build of Firefox trunk or 1.9.1 branch.
> > http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-mozilla-central/
> > http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-mozilla-1.9.1/
> >
> > Does it work on openSUSE 11.1?
> >
> > If you export NO_AT_BRIDGE=1 before starting Firefox, do you see
> > "firefox"  or "Firefox" or nothing in accerciser?
>
> With the builds Hubert prepared of 3.0.5 with only the patch  
> provided in
> #460926, Firefox doesn't appear in the accessibility hierarchy with  
> and
> without NO_AT_BRIDGE=1.

So there's something wrong with the build.
Even with the bug #460926, you should see firefox in a11y hierarchy  
without NO_AT_BRIDGE=1.

> Using the 1.9.1 branch builds you've provided, I get:
>
> + firefox-bin					application
>  + Shiretoko Alpha Start Page - Shiretoko	frame
>    - [empty]					redundant object
>
> If I add NO_AT_BRIDGE=1, I get the full hierarchy as expected.
>
> So my question is, are there more patches than just bmo #460926 that
> contribute to this working?

No, for firefox, you only need the patch in bmo #460926.
https://bugzilla.mozilla.org/attachment.cgi?id=353657

> Additionally, as a distro, are we expected
> to ship NO_AT_BRIDGE=1 in the wrapper script to get this to work?

No, you don't need to add it in wrapper.
It's already set in the patch in XRE_main().

I didn't recreate the problem on Ubuntu 8.10.

On OpenSuse, I think the problem might be atk-bridge is loaded earlier  
than XRE_main().

If you have debug symbols for Firefox and at-spi, you can run firefox  
with "-g", and set breakpoint in "atk_bridge_init".
backtrace should show where it is called.

Ginn

> Best,
>
> -Brad

--------
Ginn Chen
Software Engineer, Browser Team
Sun Microsystems, Inc.
Phone: x82869 / +86-10-62673869
Fax: +86-10-62780969