[orca-list] Experimental "Rewind" and "Fast forward" implemented for SayAll

[Joanmarie Diggs <jdiggs igalia com>]

Hey all.

I've just committed a change to master which, when enabled, makes it
possible for you to press Up and Down during a SayAll to go back and
forward in order to re-hear previously read content or skip over
something you don't want to hear. Some notes:

1. It's disabled by default. To enable it, edit your
orca-customizations.py file adding:

import orca.settings
orca.settings.rewindAndFastForwardInSayAll = True

2. Currently, if you are *not* in Gecko content, you can only rewind as
far as the beginning of the SayAll you're in. For instance, if you are
in the middle of a text document and start SayAll, Orca starts reading
from the middle of the document. You will not be able to rewind to the
start of the document. I'll fix that in the near future. In the
meantime, the solution is start the SayAll at the top of the document if
you really want to read from the top of the document. <smiles> If you're
in Gecko content, you should be able to rewind all the way to the
beginning, even if you didn't start your SayAll from there.

3. If this setting is enabled, obviously Up and Down will not interrupt
speech during a SayAll. Any other key, however, should interrupt speech.

4. Hey, wouldn't it be cool if you could also use structural navigation
to skip ahead and behind? Why yes, yes it would. <smiles> That's next on
my list.

Those of you able to test master, please give this a try and let me know
what you think. Thanks!
--joanie