Re: [orca-list] More on Orca and Firefox: possible freezing

[Josh K <joshknnd1982 gmail com>]

even in windows on some sites NVDA and window eyes become sluggish and 
slow. I suspect a similar thing is happening on that platform so its not 
just linux that's affected. maybe a filter could be developed to let us 
filter out or ignore certain events? that's all i can recommend. maybe 
it would work, not sure though.

follow me on twitter @joshknnd1982

On 4/8/2015 11:49 AM, Joanmarie Diggs wrote:
> Hi Peter.
>
> I can reproduce the sluggishness even after the fix I committed for
> Kyle's issue. I'll see what I can do, but when there's very heavy
> javascript DOM manipulation, Orca gets a ton of accessible events from
> Gecko. And they tend to be the very same sorts of events we get related
> to live regions, the creation and destruction of accessible objects, and
> changes in names. So we cannot just ignore these events; the best we can
> do is try to minimize their impact. :(
>
> --joanie
>
> On 04/08/2015 05:51 AM, Peter Vágner wrote:
> > Hello,
> > I am sorry for this message coming at such a late moment. However I have
> > finally found sites where I can for sure reproduce orca not responding
> > within a little while eventually increasing cpu load to the maximum.
> > I am running orca master 466afa052512bf4dccd20bf25faa5c50f7ba1a7a with
> > Firefox 27 on Arch linux.
> > The problem is that on some sites where some heavy javascript DOM
> > manipulation takes place orca tends to freeze a lot and the only way on
> > how to get its responsiveness back is by restarting either orca or firefox.
> > Without logging in it can for example be seen at http://www.matrix.org/
> > . Just loading this page and trying to move over the links by pressing
> > the tab key is enough for noticing the freeze. After up to 30 seconds
> > the freeze goes away by it-self and you can continue browsing like
> > normal. I know some parts of the site might be resource intensive
> > however I expect it not to be causing such a huge orca freezes.
> > Even more obvious example of what I mean is when trying to logging into
> > icloud and trying to manipulate the contacts. Of course icloud.com does
> > not have a verry accessible web service but for demoing this orca issue
> > it's accessible enough.
> > 0) Make sure you have orca and firefox running
> > 1) Go to https://www.icloud.com/ and login with your Apple ID
> > 2) once the page loads, use tab or shift+tab keys to locate the contacts
> > button and activate it. Please note sometimes the contact button can't
> > be activated by pressing the enter key so you have to emulate the mouse
> > movement and click.
> > 3) Once the contacts part of the icloud app is loaded focus is placed
> > into search contacts edit field. Now switch into focus mode, find the
> > text All contacts and notice two images on the line following after All
> > contacts text.
> > 4) Click the first of these two images. Icloud app will bring up a
> > context menu which is not accessible as it should be. However by further
> > exploring the page with orca switched into browse mode you will be able
> > to find items such as Preferences, Select All, Delete, Print etc...
> > 5) Still with orca switched to browse mode locate the Select all link,
> > and emulate mouse move and click that.
> > 6) You will notice orca freezing in to an extend you can no longer
> > navigate the page.
> >
> > I understand this use case is verry rare but this is the first where I
> > am able to reproduce it consistently so I can document the steps. As
> > find more examples of this I might post them so it's easier to handle.
> >
> > Greetings
> >
> > Peter
> >
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> > Visit http://live.gnome.org/Orca for more information on Orca.
> > The manual is at
> > http://library.gnome.org/users/gnome-access-guide/nightly/ats-2.html
> > The FAQ is at http://live.gnome.org/Orca/FrequentlyAskedQuestions
> > Log bugs and feature requests at http://bugzilla.gnome.org
> > Find out how to help at http://live.gnome.org/Orca/HowCanIHelp
> _______________________________________________
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> Visit http://live.gnome.org/Orca for more information on Orca.
> The manual is at http://library.gnome.org/users/gnome-access-guide/nightly/ats-2.html
> The FAQ is at http://live.gnome.org/Orca/FrequentlyAskedQuestions
> Log bugs and feature requests at http://bugzilla.gnome.org
> Find out how to help at http://live.gnome.org/Orca/HowCanIHelp