X: Map Alt-Up and Alt-Down to Page Up and Page Down.

X: Map Alt-Up and Alt-Down to Page Up and Page Down.

The XKB changes to do this were pretty straightforward
(largely with the help of an old mailing list thread at
http://thread.gmane.org/gmane.comp.xfree86.internationalization/1127 and
http://thread.gmane.org/gmane.comp.xfree86.internationalization/1177).

I quickly ran into an XKB bug that prevents key redirects
from working at all.  Luckily, a fix for that just got
upstreamed about two weeks ago, so I'm pulling it in here.

I also ran into a second issue mentioned on the mailing
list, where autorepeat is disabled for the keys that I
remap.  After staring at the XKB code for a long time, I
have a tiny deletion that appears to make it work without
causing any noticeable ill effects.  I'll follow up on the
X.org list to find the right way to fix this, but I'd like
to check this in in the meantime.

BUG=chromium-os:5808
TEST=tried it out

[satorux1, 2010-09-02 05:31:35]

LGTM, but Yusuke knows about it more. Please wait for Yusuke to comment.


On 2010/09/01 22:46:58, Daniel Erat wrote:
>

[Yusuke Sato, 2010-09-02 09:27:20]

LGTM.

I've confirmed that the change works fine with remapped modifier keys as well
(e.g. Control -> Alt).


On 2010/09/02 05:31:35, satorux1 wrote:
> LGTM, but Yusuke knows about it more. Please wait for Yusuke to comment.
> 
> 
> On 2010/09/01 22:46:58, Daniel Erat wrote:
> >

[davidjames, 2010-09-02 15:40:02]

How about ctrl-up for page-up, ctrl-down for page-down, ctrl-left for home, and
ctrl-right for end? I'd suggest the same with the alt key, but alt-left and
alt-right are already taken (for back and forward).

The home and end keys are really useful for big pages (e.g. where you'd have to
hit page-down fifty times to get to the bottom of the page)

[Daniel Erat, 2010-09-02 15:59:44]

Please take it up with the UI people if you feel strongly about it
(but see also http://crosbug.com/5808, where Kan wrote "NO ctrl, we
are reserving that for apps").

On Thu, Sep 2, 2010 at 8:40 AM,  <davidjames@chromium.org> wrote:
> How about ctrl-up for page-up, ctrl-down for page-down, ctrl-left for home,
> and
> ctrl-right for end? I'd suggest the same with the alt key, but alt-left and
> alt-right are already taken (for back and forward).
>
> The home and end keys are really useful for big pages (e.g. where you'd have
> to
> hit page-down fifty times to get to the bottom of the page)
>
> http://codereview.chromium.org/3364001/show
>