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Re: How to determine (from Elisp) whether the Emacs frame has focus?
From: |
Marcin Borkowski |
Subject: |
Re: How to determine (from Elisp) whether the Emacs frame has focus? |
Date: |
Sun, 15 Nov 2015 08:45:03 +0100 |
User-agent: |
mu4e 0.9.15; emacs 25.0.50.1 |
On 2015-11-14, at 14:40, Eli Zaretskii <eliz@gnu.org> wrote:
>> From: Marcin Borkowski <mbork@mbork.pl>
>> Cc: help-gnu-emacs@gnu.org
>> Date: Sat, 14 Nov 2015 13:34:06 +0100
>>
>> > Then I don't understand why the solution of focus-in/out-hook was
>> > rejected as "hackish". These hooks are there precisely for situations
>> > like these, AFAIK. IMO, there's nothing hackish about that.
>>
>> AFAIU, these hooks are best suited to situations like "run LaTeX on
>> switching to a pdf viewer". That does not require global variables; my
>> use case does.
>
> Sorry, I still don't understand: why cannot the hook modify values of
> global variables, and thus serve your needs in this context?
Well, you're probably right, I'm just overthinking it.
>> Would it be possible to introduce a function like (emacs-has-focus-p)
>> for that? Would it make sense?
>
> What would that function do except test the value of some global
> variable, set by the focus-in and focus-out hooks?
Well, it could do it without using those hooks, if it were in C. But
you're probably right (again), there's no need to add that to the core.
>> For starters, I only want to know whether it is Emacs which has focus or
>> not. Then, I would like to know e.g. the mode of the current buffer; in
>> that case, I'm not sure what I should do when the current buffer is the
>> minibuffer or something. But this is less important for me now.
>
> There's only one current buffer in the entire Emacs session, and it
> doesn't change when Emacs loses focus. Its value is returned by the
> function current-buffer, as I'm sure you know.
Of course. However, what I really mean is not exactly (current-buffer),
but "the buffer I'm working in now". This means that if
e.g. current-buffer is the minibuffer (as might be the case during
search or M-x or whatever), I would prefer /the buffer I'll get back to
when I finish doing whatever I'm doing in the minibuffer/, or /the
buffer I was in when I switched to the minibuffer/ (these two need not
coincide, of course, e.g. in case of C-x b - in such a case I'm fine
with whichever one). This might be the other-buffer, I'm not sure -
I'll have to study the docs a bit more.
Best,
--
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University
- Re: How to determine (from Elisp) whether the Emacs frame has focus?, (continued)
Re: How to determine (from Elisp) whether the Emacs frame has focus?, Eli Zaretskii, 2015/11/14
- Re: How to determine (from Elisp) whether the Emacs frame has focus?, Random832, 2015/11/14
- Re: How to determine (from Elisp) whether the Emacs frame has focus?, Eli Zaretskii, 2015/11/14
- Re: How to determine (from Elisp) whether the Emacs frame has focus?, Marcin Borkowski, 2015/11/14
- Re: How to determine (from Elisp) whether the Emacs frame has focus?, Eli Zaretskii, 2015/11/14
- Re: How to determine (from Elisp) whether the Emacs frame has focus?,
Marcin Borkowski <=
- Re: How to determine (from Elisp) whether the Emacs frame has focus?, Eli Zaretskii, 2015/11/16
- Re: How to determine (from Elisp) whether the Emacs frame has focus?, Nicolas Richard, 2015/11/16
- Re: How to determine (from Elisp) whether the Emacs frame has focus?, Marcin Borkowski, 2015/11/16
Re: How to determine (from Elisp) whether the Emacs frame has focus?, Stefan Monnier, 2015/11/16
Re: How to determine (from Elisp) whether the Emacs frame has focus?, Marcin Borkowski, 2015/11/16
Re: How to determine (from Elisp) whether the Emacs frame has focus?, Michael Heerdegen, 2015/11/14
Re: How to determine (from Elisp) whether the Emacs frame has focus?, Marcin Borkowski, 2015/11/14