[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Start keybinding combination
From: |
Eli Zaretskii |
Subject: |
Re: Start keybinding combination |
Date: |
Mon, 31 Jan 2022 14:23:34 +0200 |
> Date: Sun, 30 Jan 2022 21:54:47 +0100
> From: Ergus <spacibba@aol.com>
> Cc: help-gnu-emacs@gnu.org
>
> >What would such a hook do to produce the effect that you want? The
> >mode-line color change will not be visible unless you force redisplay
> >of the mode line.
> >
> Hi Eli:
>
> My question comes from the fact that I see the prefix in the echo area
> and it looks inconspicuous. So, some redisplay is actually done
> right?
A very limited variant of redisplay, which only updates the echo-area.
> Something like:
>
> (add-hook the-new-hook (lambda ()
> (face-remap-add-relative 'mode-line :background some-color)))
>
> And then call `face-remap-remove-relative` in the opposed|symmetric exit
> hook... similar to what minibuffer-setup-hook/minibuffer-exit-hook do.
>
> But I could be wrong.
>
> Does it makes sense?
It would make the prompt much slower, because updating the mode line
requires a very thorough redisplay, the way it is implemented. And if
you on top of that change the mode-line face, Emacs will need to
recompute all the faces (twice) as well. I wonder if it's worth it.