How to set minibuffer-prompt face foreground conditionally?

How to set minibuffer-prompt face foreground conditionally?

[Richard Cobbe]

I'm using GNU Emacs 23.3.1 on MacOS 10.6, although I've observed the same
behavior with 23.1.1 on Ubuntu 10.10.

I'm having trouble setting the foreground color of minibuffer-prompt in my
.emacs file.  If I evaluate (set-face-foreground 'minibuffer-prompt "cyan")
either with M-x eval-expression or in the scratch buffer, then the face
changes color.  But if I put the same thing into .emacs and restart, it has
no effect at all.  Customizing the font works, but this isn't sufficient
for what I'm trying to do; see below.

Context: I want to change the foreground color of the minibuffer-prompt
face, but only when window-system is nil.  Normally (when window-system is
one of 'mac 'ns or 'x) the minibuffer prompt is readable, but when I run
emacs in a terminal, the minibuffer prompt shows up as dark blue on the
only-slightly-different dark blue that I use for my xterm background.  I do
have '(background-mode . dark) in default-frame-alist for all
window-systems.

Is there a way to do this that I'm overlooking?

Thanks,

Richard

Re: How to set minibuffer-prompt face foreground conditionally?

[Peter Dyballa]

Am 12.2.2012 um 18:32 schrieb Richard Cobbe:

> Is there a way to do this that I'm overlooking?

Possibly... I have set a customisation like that, which is active in all GNU Emacs variants, with or without windowing system:

	'(minibuffer-prompt ((t (:background "yellow" :foreground "OrangeRed4" :weight bold))))

Could be I used its own customisation system for this.

--
Greetings

  Pete

Windows, c'est un peu comme le beaujolais nouveau: à chaque nouvelle cuvée on sait que ce sera dégueulasse, mais on en prend quand même, par masochisme.

Re: How to set minibuffer-prompt face foreground conditionally?

[Richard Cobbe]

On Sun, Feb 12, 2012 at 10:08:40PM +0100, Peter Dyballa wrote:
>
> Am 12.2.2012 um 18:32 schrieb Richard Cobbe:
>
> > Is there a way to do this that I'm overlooking?
>
> Possibly... I have set a customisation like that, which is active in all GNU Emacs variants, with or without windowing system:
>
>       '(minibuffer-prompt ((t (:background "yellow" :foreground "OrangeRed4" :weight bold))))
>
> Could be I used its own customisation system for this.

Thanks -- I wasn't aware that custom-set-faces could contain conditions
like this.  With a little digging around in the help, I was able to find a
solution.

I'm not thrilled with it -- not only do I have to edit the customization
stuff by hand (which rather seems to defeat the purpose of the
customization system), but I still think that there should be a way to do
this programatically in elisp.  However, I have a solution that works, and
I'm ok with that.

Thanks,

Richard