[BRLTTY] Typing/reading braille combinations

[Samuel Thibault]

Nicolas Pitre, le Mon 17 Apr 2006 20:39:56 -0400, a écrit :
> On Sun, 16 Apr 2006, Samuel Thibault wrote:
> 
> > Raoul MEGELAS, le Sun 16 Apr 2006 22:32:49 +0200, a écrit :
> > > > The problem here is that the _keyboard_ doesn't report the keypress,
> > > > because it is physically limited.
> > > 
> > > here i can make a chord with jbn then lkm
> > > points 123 first then 456. with this combination i think we could go.
> > > in other words one char = 2 chord strokes. Isn't it?
> > 
> > Well, why not. But this needs to be implemented in the kernel. Not so
> > easy.
> 
> Is the kernel really the best place for braille capture and map?

At least defining braille dots in the kernel is useful, in case some
braille devices can only be handled by the kernel, or at least for
completeness.

Then, having some basic braille typing facility in the mainline kernel
can be of help for anyone without having to setup and run a daemon.
Compose keys were implemented in the kernel while it could have been
done in a deamon, I'm just following that :)

> Even X-Windows grabs raw key events and does its own mapping outside
> the kernel.

Of course, since it wants to present exactly the same key bindings,
whichever the kernel (linux/bsd/solaris/windows/...). I'm currently
adding braille typing facilities in X too (which is somewhat more tricky
since mapping is done _in X clients_).

Regards,
Samuel