C-h k does not work with M-o

C-h k does not work with M-o

[Robert J. Chassell]

M-o (`facemenu-keymap') fails when called with describe-key (`C-h k')

When I do

    C-h k M-o

I see a line beginning with

    Set face:

Today's GNU Emacs CVS snapshot,  Mon, 2007 May 28  9:58 UTC
GNU Emacs 22.1.50.16 (i686-pc-linux-gnu, GTK+ Version 2.8.20)
started with

     ${srcdir}/src/emacs -Q -D
  where srcdir=/usr/local/src/emacs
  in my case, the command was      /usr/local/src/emacs/src/emacs -Q -D

--
    Robert J. Chassell                          GnuPG Key ID: 004B4AC8
    bob@rattlesnake.com                         bob@gnu.org
    http://www.rattlesnake.com                  http://www.teak.cc

RE: C-h k does not work with M-o

[Drew Adams]

> When I do C-h k M-o I see a line beginning with Set face:

M-o is a prefix key. If you type another character, say `b', then you should
get help for the key sequence, say `M-o b'.

Re: C-h k does not work with M-o

[Robert J. Chassell]

    > When I do C-h k M-o I see a line beginning with Set face:

    M-o is a prefix key. ...

That is correct.  It would be nice if describe-key (`C-h k') provided
an error message (after a suitable and adjustable time out) for this.
This would help the novices and the foolish, but not anyone else.  (I
do not have time to propose a fix.)

-- 
    Robert J. Chassell                          GnuPG Key ID: 004B4AC8
    bob@rattlesnake.com                         bob@gnu.org
    http://www.rattlesnake.com                  http://www.teak.cc

RE: C-h k does not work with M-o

[Drew Adams]

>     > When I do C-h k M-o I see a line beginning with Set face:
> 
>     M-o is a prefix key. ...
> 
> That is correct.  It would be nice if describe-key (`C-h k') provided
> an error message (after a suitable and adjustable time out) for this.
> This would help the novices and the foolish, but not anyone else.  (I
> do not have time to propose a fix.)

Do you mean something like this?

(message "`%s' is a prefix key; type another key"
         (this-command-keys))
(sit-for 2)

Re: C-h k does not work with M-o

[Michael Schierl]

On Mon, 28 May 2007 21:59:18 +0000 (UTC), Robert J. Chassell wrote:

>     > When I do C-h k M-o I see a line beginning with Set face:
> 
>     M-o is a prefix key. ...
> 
> That is correct.  It would be nice if describe-key (`C-h k') provided
> an error message (after a suitable and adjustable time out) for this.
> This would help the novices and the foolish, but not anyone else.  (I
> do not have time to propose a fix.)

While we are at it: When pressing M-o C-h a list of all shortcuts starting 
with M-o appears. But when having pressed C-h k M-o there is no way from 
there to show this list, C-h k M-o C-h does not work as one might expect.

Michael

Re: C-h k does not work with M-o

[Kevin Rodgers]

Drew Adams wrote:
>> When I do C-h k M-o I see a line beginning with Set face:
> 
> M-o is a prefix key. If you type another character, say `b', then you should
> get help for the key sequence, say `M-o b'.

Yes, but why does `C-h k M-o' display a command prompt?

-- 
Kevin Rodgers
Denver, Colorado, USA

RE: C-h k does not work with M-o

[Drew Adams]

> >> When I do C-h k M-o I see a line beginning with Set face:
> >
> > M-o is a prefix key. If you type another character, say `b',
> > then you should get help for the key sequence, say `M-o b'.
>
> Yes, but why does `C-h k M-o' display a command prompt?

Good point (and probably Robert's initial point, which I overlooked).

Apparently, Emacs thinks it should invoke `x-popup-menu' at that point, for
some reason.

I wonder if this thread is pertinent: "doc of prompt change with minor mode
for read-key-sequence" from 2006-09? Or at least I wonder if this might have
something to do with keyboard menus and "Hierarkey"?

Re: C-h k does not work with M-o

[Andreas Schwab]

"Robert J. Chassell" <bob@rattlesnake.com> writes:

> M-o (`facemenu-keymap') fails when called with describe-key (`C-h k')
>
> When I do
>
>     C-h k M-o
>
> I see a line beginning with
>
>     Set face:

That's not a bug.  Since M-o is a prefix key, you need to type another
key to complete it.  read-key-sequence does not return until it had read
a complete keys.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."