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Re: Recognizing active/inactive mode-line in (:eval ...) form in mode-li
From: |
Michael Heerdegen |
Subject: |
Re: Recognizing active/inactive mode-line in (:eval ...) form in mode-line-string |
Date: |
Fri, 01 Mar 2013 20:21:00 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) |
Alessandro Piras <laynor@gmail.com> writes:
> Is there a way to know if the mode-line is active in a (:eval ...)
> form inside the mode-line-string?
>
> A simple example:
> mode-line-string =>
> ("%e" (:eval (if <condition> "foo" "bar")))
>
> I would like to see "foo" on the mode-line of the active window,
> "bar" on the others.
This is a very good question!
AFAICT, when the mode-line of any window is calculated, it is
temporarily selected. This would mean that such a condition doesn't
exist. So, you'll need some trick, e.g. something like
--8<---------------cut here---------------start------------->8---
(add-hook 'post-command-hook
(lambda () (setq my-selected-window (selected-window))))
(push '(:eval (if (eq (selected-window) my-selected-window)
"foo" "bar")) default-mode-line-format)
--8<---------------cut here---------------end--------------->8---
i.e., try to remember and update the selected window in a global
variable. Probably this can be achieved more elegantly than above.
Note that you still may have to force a mode-line update to always have
the right "foo" or "bar".
Regards,
Michael.
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