GNU bug report logs - #50141
Current part of emacs red, other parts blue

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Package: emacs; Reported by: 積丹尼 Dan Jacobson <jidanni@HIDDEN>; merged with #12056; dated Sat, 21 Aug 2021 06:06:01 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: martin rudalics <rudalics@HIDDEN>
Subject: Re: bug#50141: Current part of emacs red, other parts blue
References: <87tujjz612.5.fsf@HIDDEN> <83pmu7z3zg.fsf@HIDDEN>
 <87lf4v3qwu.fsf@HIDDEN> <838s0vym9i.fsf@HIDDEN>
 <837dgfylr8.fsf@HIDDEN> <3198fb21-e94e-a397-5d41-d0fbb1f78cbe@HIDDEN>
Date: Sat, 21 Aug 2021 16:14:14 +0200
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 message of "Sat, 21 Aug 2021 15:55:57 +0200")
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 Content preview: martin rudalics <rudalics@HIDDEN> writes: > Here I can write
 > > (set-window-face-remapping-alist nil '((default (:background "yellow")
 > default))) > > It was pretty trivial to implement but lifting it from the
 rest of my > changes might be [...] 
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martin rudalics <rudalics@HIDDEN> writes:

> Here I can write
>
> (set-window-face-remapping-alist nil '((default (:background "yellow")
> default)))
>
> It was pretty trivial to implement but lifting it from the rest of my
> changes might be non-trivial.  If people are very, very interested, I
> can give it a try.

Could be interesting...

Eli Zaretskii <eliz@HIDDEN> writes:

> But the request here is not to do this for a particular window, the
> request is to do this for _any_ window when it is selected.

It'd be used by a (minor) mode that'd loop over all windows on a
window selection change, I'd have thought?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#50141; Package emacs. Full text available.

Message received at 50141 <at> debbugs.gnu.org:


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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Gregory Heytings <gregory@HIDDEN>
Subject: Re: bug#50141: Current part of emacs red, other parts blue
References: <87tujjz612.5.fsf@HIDDEN> <83pmu7z3zg.fsf@HIDDEN>
 <87lf4v3qwu.fsf@HIDDEN> <838s0vym9i.fsf@HIDDEN>
 <87ilzz2ah2.fsf@HIDDEN> <835yvyzzpn.fsf@HIDDEN>
 <87y28u29ee.fsf@HIDDEN> <bfa2561eafc68acb489e@HIDDEN>
Date: Sat, 21 Aug 2021 16:12:51 +0200
In-Reply-To: <bfa2561eafc68acb489e@HIDDEN> (Gregory Heytings's message
 of "Sat, 21 Aug 2021 14:01:30 +0000")
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 Content preview: Gregory Heytings <gregory@HIDDEN> writes: > It is
 already
 implemented AFAICS: > > (require 'auto-dim-other-buffers) >
 (set-face-attribute
 'default nil :background "red") > (set-face-attribute
 'auto-dim-other-buffers-face nil :background "blue [...] 
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Gregory Heytings <gregory@HIDDEN> writes:

> It is already implemented AFAICS:
>
> (require 'auto-dim-other-buffers)
> (set-face-attribute 'default nil :background "red")
> (set-face-attribute 'auto-dim-other-buffers-face nil :background "blue")
> (auto-dim-other-buffers-mode 1)
>
> It uses the :filtered feature introduced in Emacs 27.

Oh, cool.  I guess there isn't more to do here, then...

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#50141; Package emacs. Full text available.

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Date: Sat, 21 Aug 2021 17:01:27 +0300
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From: Eli Zaretskii <eliz@HIDDEN>
To: martin rudalics <rudalics@HIDDEN>
In-Reply-To: <3198fb21-e94e-a397-5d41-d0fbb1f78cbe@HIDDEN> (message from
 martin rudalics on Sat, 21 Aug 2021 15:55:57 +0200)
Subject: Re: bug#50141: Current part of emacs red, other parts blue
References: <87tujjz612.5.fsf@HIDDEN> <83pmu7z3zg.fsf@HIDDEN>
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> Cc: 50141 <at> debbugs.gnu.org, jidanni@HIDDEN
> From: martin rudalics <rudalics@HIDDEN>
> Date: Sat, 21 Aug 2021 15:55:57 +0200
> 
> (set-window-face-remapping-alist nil '((default (:background "yellow") default)))
> 
> It was pretty trivial to implement but lifting it from the rest of my
> changes might be non-trivial.  If people are very, very interested, I
> can give it a try.

But the request here is not to do this for a particular window, the
request is to do this for _any_ window when it is selected.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#50141; Package emacs. Full text available.

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Date: Sat, 21 Aug 2021 14:01:30 +0000
From: Gregory Heytings <gregory@HIDDEN>
To: Lars Ingebrigtsen <larsi@HIDDEN>
Subject: Re: bug#50141: Current part of emacs red, other parts blue
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>
> I don't know -- I haven't actually looked at how this could be 
> implemented.
>

It is already implemented AFAICS:

(require 'auto-dim-other-buffers)
(set-face-attribute 'default nil :background "red")
(set-face-attribute 'auto-dim-other-buffers-face nil :background "blue")
(auto-dim-other-buffers-mode 1)

It uses the :filtered feature introduced in Emacs 27.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#50141; Package emacs. Full text available.

Message received at 50141 <at> debbugs.gnu.org:


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Subject: Re: bug#50141: Current part of emacs red, other parts blue
To: Eli Zaretskii <eliz@HIDDEN>, larsi@HIDDEN
References: <87tujjz612.5.fsf@HIDDEN> <83pmu7z3zg.fsf@HIDDEN>
 <87lf4v3qwu.fsf@HIDDEN> <838s0vym9i.fsf@HIDDEN> <837dgfylr8.fsf@HIDDEN>
From: martin rudalics <rudalics@HIDDEN>
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Date: Sat, 21 Aug 2021 15:55:57 +0200
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 >> buffer-list-update-hook sounds like that infrastructure.

`window-selection-change-functions' please.

 > But I think the real problem is how to define a window-specific
 > default face.  It's not easy, and I'm not sure it will work.
 > Something using the :filtered thingy, I guess?  But I'm not sure it
 > will work for the default face.
 >
 > Basically, faces were never designed to be window-specific.  Even
 > making them buffer-specific (via face-remapping-alist) is somewhat
 > tricky.

Here I can write

(set-window-face-remapping-alist nil '((default (:background "yellow") default)))

It was pretty trivial to implement but lifting it from the rest of my
changes might be non-trivial.  If people are very, very interested, I
can give it a try.

martin




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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#50141: Current part of emacs red, other parts blue
References: <87tujjz612.5.fsf@HIDDEN> <83pmu7z3zg.fsf@HIDDEN>
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Date: Sat, 21 Aug 2021 15:51:37 +0200
In-Reply-To: <835yvyzzpn.fsf@HIDDEN> (Eli Zaretskii's message of "Sat, 21 Aug
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 Content preview:  Eli Zaretskii <eliz@HIDDEN> writes: >> Yeah, I suspect we
 can't use faces here,
 but might have to add some new >> window-specific background
 colour setting? > > What could that color setting be,
 except some face attribute?
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Eli Zaretskii <eliz@HIDDEN> writes:

>> Yeah, I suspect we can't use faces here, but might have to add some new
>> window-specific background colour setting?
>
> What could that color setting be, except some face attribute?

I don't know -- I haven't actually looked at how this could be
implemented.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no




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In-Reply-To: <87ilzz2ah2.fsf@HIDDEN> (message from Lars Ingebrigtsen on Sat, 
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Subject: Re: bug#50141: Current part of emacs red, other parts blue
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> From: Lars Ingebrigtsen <larsi@HIDDEN>
> Cc: jidanni@HIDDEN,  50141 <at> debbugs.gnu.org
> Date: Sat, 21 Aug 2021 15:28:25 +0200
> 
> > Basically, faces were never designed to be window-specific.  Even
> > making them buffer-specific (via face-remapping-alist) is somewhat
> > tricky.
> 
> Yeah, I suspect we can't use faces here, but might have to add some new
> window-specific background colour setting?

What could that color setting be, except some face attribute?




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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#50141: Current part of emacs red, other parts blue
References: <87tujjz612.5.fsf@HIDDEN> <83pmu7z3zg.fsf@HIDDEN>
 <87lf4v3qwu.fsf@HIDDEN> <838s0vym9i.fsf@HIDDEN>
Date: Sat, 21 Aug 2021 15:28:25 +0200
In-Reply-To: <838s0vym9i.fsf@HIDDEN> (Eli Zaretskii's message of "Sat, 21 Aug
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 Content preview: Eli Zaretskii <eliz@HIDDEN> writes: >
 buffer-list-update-hook
 sounds like that infrastructure. But it's only run if NORECORD is nil...
 But I guess that only happens when we're not really displaying the window,
 but only selecting it to select back to something else before the user
 notices? So us [...] 
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Eli Zaretskii <eliz@HIDDEN> writes:

> buffer-list-update-hook sounds like that infrastructure.

But it's only run if NORECORD is nil...  But I guess that only happens
when we're not really displaying the window, but only selecting it to
select back to something else before the user notices?  So using it
should perhaps work...

Eli Zaretskii <eliz@HIDDEN> writes:

> But I think the real problem is how to define a window-specific
> default face.  It's not easy, and I'm not sure it will work.
> Something using the :filtered thingy, I guess?  But I'm not sure it
> will work for the default face.
>
> Basically, faces were never designed to be window-specific.  Even
> making them buffer-specific (via face-remapping-alist) is somewhat
> tricky.

Yeah, I suspect we can't use faces here, but might have to add some new
window-specific background colour setting?  Which might be generally
useful, anyway.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no




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Subject: Re: bug#50141: Current part of emacs red, other parts blue
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> Date: Sat, 21 Aug 2021 16:12:41 +0300
> From: Eli Zaretskii <eliz@HIDDEN>
> Cc: 50141 <at> debbugs.gnu.org, jidanni@HIDDEN
> 
> > From: Lars Ingebrigtsen <larsi@HIDDEN>
> > Cc: 積丹尼 Dan Jacobson <jidanni@HIDDEN>,
> >   50141 <at> debbugs.gnu.org
> > Date: Sat, 21 Aug 2021 14:48:01 +0200
> > 
> > However, Dan's request has come up a number of times (e.g., bug#12056,
> > which I'm merging this with), so I'm wondering whether we should add
> > something like this...  or at least add some infrastructure that would
> > allow it.
> > 
> > The obvious thing would be to run something from `select-window', but I
> > don't see any obvious hook that we could be using there.  Am I missing
> > something?  I was thinking about adding a minor mode for changing
> > background colours in windows...
> 
> buffer-list-update-hook sounds like that infrastructure.

But I think the real problem is how to define a window-specific
default face.  It's not easy, and I'm not sure it will work.
Something using the :filtered thingy, I guess?  But I'm not sure it
will work for the default face.

Basically, faces were never designed to be window-specific.  Even
making them buffer-specific (via face-remapping-alist) is somewhat
tricky.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#50141; Package emacs. Full text available.

Message received at 50141 <at> debbugs.gnu.org:


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To: Lars Ingebrigtsen <larsi@HIDDEN>
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Subject: Re: bug#50141: Current part of emacs red, other parts blue
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> From: Lars Ingebrigtsen <larsi@HIDDEN>
> Cc: 積丹尼 Dan Jacobson <jidanni@HIDDEN>,
>   50141 <at> debbugs.gnu.org
> Date: Sat, 21 Aug 2021 14:48:01 +0200
> 
> However, Dan's request has come up a number of times (e.g., bug#12056,
> which I'm merging this with), so I'm wondering whether we should add
> something like this...  or at least add some infrastructure that would
> allow it.
> 
> The obvious thing would be to run something from `select-window', but I
> don't see any obvious hook that we could be using there.  Am I missing
> something?  I was thinking about adding a minor mode for changing
> background colours in windows...

buffer-list-update-hook sounds like that infrastructure.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#50141; Package emacs. Full text available.
Forcibly Merged 12056 50141. Request was from Lars Ingebrigtsen <larsi@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

Message received at 50141 <at> debbugs.gnu.org:


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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#50141: Current part of emacs red, other parts blue
References: <87tujjz612.5.fsf@HIDDEN> <83pmu7z3zg.fsf@HIDDEN>
Date: Sat, 21 Aug 2021 14:48:01 +0200
In-Reply-To: <83pmu7z3zg.fsf@HIDDEN> (Eli Zaretskii's message of "Sat, 21 Aug
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 Content preview:  Eli Zaretskii <eliz@HIDDEN> writes: > Emacs's way to mark
 the current window is by changing the way the mode > line is displayed.
 There's
 also `cursor-in-non-selected-windows', which is another kinda-sorta subtle
 indicator. 
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Eli Zaretskii <eliz@HIDDEN> writes:

> Emacs's way to mark the current window is by changing the way the mode
> line is displayed.

There's also `cursor-in-non-selected-windows', which is another
kinda-sorta subtle indicator.

However, Dan's request has come up a number of times (e.g., bug#12056,
which I'm merging this with), so I'm wondering whether we should add
something like this...  or at least add some infrastructure that would
allow it.

The obvious thing would be to run something from `select-window', but I
don't see any obvious hook that we could be using there.  Am I missing
something?  I was thinking about adding a minor mode for changing
background colours in windows...

On the other hand, if we want to add this, perhaps it'd make more sense
to just add a new variable to change the background colour of
non-selected backgrounds directly.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#50141; Package emacs. Full text available.

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> From: 積丹尼 Dan Jacobson
>  <jidanni@HIDDEN>
> Date: Sat, 21 Aug 2021 14:05:45 +0800
> 
> $ emacs
> C-x 2
> C-x 3
> C-x 2
> C-x 3
> We have chopped the screen into little chunks.
> It would be nice to have the current chunk's background e.g., red,
> and the other chunks' blue.
> https://stackoverflow.com/questions/33195122/highlight-current-active-window
> didn't work for me.

Emacs's way to mark the current window is by changing the way the mode
line is displayed.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#50141; Package emacs. Full text available.

Message received at submit <at> debbugs.gnu.org:


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Subject: Current part of emacs red, other parts blue
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$ emacs
C-x 2
C-x 3
C-x 2
C-x 3
We have chopped the screen into little chunks.
It would be nice to have the current chunk's background e.g., red,
and the other chunks' blue.
https://stackoverflow.com/questions/33195122/highlight-current-active-window
didn't work for me.




Acknowledgement sent to 積丹尼 Dan Jacobson <jidanni@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#50141; Package emacs. Full text available.
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