Hi Marco,

thanks for the additional input. I have added that to the Bugzilla ticket:
https://bugs.documentfoundation.org/show_bug.cgi?id=149488#c1

Michael

On 08/06/2022 13.03, Marco Zehe wrote:
Correct, in PowerPoint, when a presentation is started, both NVDA and JAWS, and 
presumably at some point, Narrator, too, will grab the slide contents and 
present it slide by slide like a web page. JAWS even annotates links, tables, 
lists, etc., in a very rich way. NVDA, to my knowledge, doesn't do that yet.

In MS Office, screen readers have largely switched to using UI Automation (UIA) for 
access to all things documents and UI. This is primarily because of Narrator, which 
doesn't support anything other than UIA (MSAA and IA2 are only supported by way of an IA2 
to UIA bridge, which is slow and unreliable). As a consequence, Microsoft never got on 
the IAccessible2 bandwaggon, but has pushed the UIA implementation in the Chromium 
project so they can stop using the IAccessible2ToUIA Bridge for Narrator's access to web 
content. There were even plans and experiments to switch Firefox over to UIA when I was 
still working at Mozilla. But since I am no longer involved there, I don't know if this 
is still on the table for the time after they finish the "Cache The World" 
project.

So, in the long term, and as resources permit, the more future-proof way 
forward for LibreOffice on Windows might be to switch over to an UIA 
implementation as well. But even without that, there would need to be a 
concerted effort between the Impress and screen reader teams, like NVDA, to 
make NVDA realize that it is in a slide show in presentation mode, and gain all 
the access to the slide contents like it were a web page or similar. That 
cannot be achieved by one party alone I think. And getting Vispero on board for 
JAWS support is an even bigger fish to fry.

Marco

-----Original Message-----
From: Jason White <ja...@jasonjgw.net>
Sent: Tuesday, June 7, 2022 9:34 PM
To: accessibility@global.libreoffice.org
Subject: Re: [libreoffice-accessibility] Re: ESC meeting minutes: 2022-05-26


On 7/6/22 06:07, Michael Weghorn wrote:
I tried again with just a single screen instead of two, and then NVDA
announces "Slide 1", then reads out the slide content, and when moving
further: "Slide 2" and its content, etc.
Is that what you think Impress should do as well? (It didn't in a
quick test with gtk3 on Linux.)

Yes. If I recall correctly, under MS-Windows/PowerPoint, NVDA and JAWS both 
support arrow key navigation in the slide contents when the slides are being 
presented (i.e., after F5 is used to start a presentation).

Ideally, one should be able to do the same in LibreOffice/Impress, and under 
Linux also.

Space/Backspace navigate among slides in Windows/PowerPoint too.
Obviously, Impress needs a similar keyboard mechanism for slide navigation.

None of this should depend on the number of attached displays. I don't think 
anyone wants their accessibility to fail just in virtue of the number of 
displays that happen to be connected.

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