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bug#48755: 28.0.50; Emacs doesn't detect the terminal background color i
From: |
Daniel Martín |
Subject: |
bug#48755: 28.0.50; Emacs doesn't detect the terminal background color in macOS Terminal or iTerm2 |
Date: |
Mon, 31 May 2021 00:20:35 +0200 |
Steps to reproduce the problem:
- Start macOS Terminal or iTerm2 (both are probably the most popular
terminals for macOS).
- Switch the terminal background color to a dark color.
- emacs -nw -Q
Actual result:
Colored text is sometimes very difficult to read, because Emacs assumes
it's running on a light terminal background, and configures the faces
accordingly.
Expected result:
Emacs faces are those of a dark background.
Workaround:
Customize frame-background-mode to 'dark.
Here's some information about macOS Terminal and iTerm2. Apparently,
they both identify as xterm-256color and support querying the background
color:
macOS Terminal:
$ printf '\e[>0c'
1;95;0c
$ printf '\e]11;?\e\'
11;rgb:0000/0000/0000
$ echo $TERM
xterm-256color
iTerm2:
$ printf '\e[>0c'
0;95;0c
$ printf '\e]11;?\e\'
11;rgb:0000/0000/0000
$ echo $TERM
xterm-256color
I tried to fix the problem by taking a look at xterm--version-handler in
xterm.el, but the version logic is a bit difficult to understand. Is
there some documentation about the versions and capabilities somewhere?
I'm worried about changing things there may cause regressions in other
terminals.
Thanks.
- bug#48755: 28.0.50; Emacs doesn't detect the terminal background color in macOS Terminal or iTerm2,
Daniel Martín <=