GNU bug report logs - #76703
Emacs running in Terminal does not change the background color of the bottom right corner

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Codruț Constantin Gușoi <mail+gnu <at> codrut.pro>
To: bug-gnu-emacs <at> gnu.org
Subject: Emacs running in Terminal does not change the background color of the
 bottom right corner
Date: Sun, 02 Mar 2025 15:51:52 +0000

[Message part 1 (text/plain, inline)]

Hello,


This has been a thing that I've noticed in Emacs since I started using 
it a decade ago, but I kind of ignored it. I'd like to see a proper fix 
for it though.


Running any Emacs version (tested on 29.4 and 31.0.50 from 2nd of March 
2025 commit c4232a08f135b347a24cb75bb901659d45c61787) in a terminal 
makes the bottom right corner not respect a theme's background colour.


You have screenshots in this snippet: 
https://gitlab.com/-/snippets/4814843, also attached.


Exhibit 1 - Emacs running with the following command:

```

|emacs -Q -nw --eval '(dolist (face (face-list)) (set-face-foreground 
face "white") (set-face-background face "white"))' |

```

Notice the bottom right corner is dark, same colour as the terminal 
background.


Exhibit 2 - vim running with the following command:

```

vim -u NONE -c "colorscheme delek"

```

Notice the bottom right corner is white, same colour as the theme.


Now, because vim can do it, it means it's not impossible, and Emacs can 
also implement something similar and fix this issue. It's kind of hard 
for me to figure out what is going on here. From what I've understood 
this has something to do with the way Emacs handles cursors?

[exhibit-1.png (image/png, attachment)]

[exhibit-2.png (image/png, attachment)]

Message #8 received at 76703 <at> debbugs.gnu.org (full text, mbox):

From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Codruț Constantin Gușoi
 <mail+gnu <at> codrut.pro>
Cc: 76703 <at> debbugs.gnu.org
Subject: Re: bug#76703: Emacs running in Terminal does not change the
 background color of the bottom right corner
Date: Mon, 10 Mar 2025 14:01:22 +0100

Codruț Constantin Gușoi <mail+gnu <at> codrut.pro> writes:

> Running any Emacs version (tested on 29.4 and 31.0.50 from 2nd of March 
> 2025 commit c4232a08f135b347a24cb75bb901659d45c61787) in a terminal 
> makes the bottom right corner not respect a theme's background colour.

I think I fixed this yesterday or so on master. Please give it a try.

Message #11 received at 76703 <at> debbugs.gnu.org (full text, mbox):

From: Codruț Constantin Gușoi <mail+gnu <at> codrut.pro>
To: Gerd Möllmann <gerd.moellmann <at> gmail.com>
Cc: 76703 <at> debbugs.gnu.org
Subject: Re: bug#76703: Emacs running in Terminal does not change the
 background color of the bottom right corner
Date: Mon, 10 Mar 2025 13:54:37 +0000

Thank you for fixing this! Just tried it, works perfectly.

On Monday, 10 March 2025 at 13:01, Gerd Möllmann <gerd.moellmann <at> gmail.com> wrote:

> Codruț Constantin Gușoi mail+gnu <at> codrut.pro writes:
> 
> > Running any Emacs version (tested on 29.4 and 31.0.50 from 2nd of March
> > 2025 commit c4232a08f135b347a24cb75bb901659d45c61787) in a terminal
> > makes the bottom right corner not respect a theme's background colour.
> 
> 
> I think I fixed this yesterday or so on master. Please give it a try.

Message #14 received at 76703 <at> debbugs.gnu.org (full text, mbox):

From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Codruț Constantin Gușoi
 <mail+gnu <at> codrut.pro>
Cc: 76703 <at> debbugs.gnu.org
Subject: Re: bug#76703: Emacs running in Terminal does not change the
 background color of the bottom right corner
Date: Mon, 10 Mar 2025 14:56:59 +0100

Codruț Constantin Gușoi <mail+gnu <at> codrut.pro> writes:

> Thank you for fixing this! Just tried it, works perfectly.

Thanks for testing! I'll close this ticket, then.

>
> On Monday, 10 March 2025 at 13:01, Gerd Möllmann <gerd.moellmann <at> gmail.com> wrote:
>
>> Codruț Constantin Gușoi mail+gnu <at> codrut.pro writes:
>> 
>> > Running any Emacs version (tested on 29.4 and 31.0.50 from 2nd of March
>> > 2025 commit c4232a08f135b347a24cb75bb901659d45c61787) in a terminal
>> > makes the bottom right corner not respect a theme's background colour.
>> 
>> 
>> I think I fixed this yesterday or so on master. Please give it a try.

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