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s3rvac/undercurl-konsole-tmux-nvim.md

Created February 24, 2024 14:55
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Undercurl in Neovim running in Tmux and Konsole
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undercurl-konsole-tmux-nvim.md

Undercurl in Neovim running in Tmux and Konsole

A HOWTO for getting undercurl support in Neovim running in Tmux and Konsole.

Konsole

You need to be running Konsole v22.11.80 or newer (undercurl support was introduced in this commit on 2022-08-26).

Tmux

Add the following settings to your TMux configuration file (e.g. ~/.tmux.conf):

set -as terminal-overrides ',*:Smulx=\E[4::%p1%dm'
set -as terminal-overrides ',*:Setulc=\E[58::2::%p1%{65536}%/%d::%p1%{256}%/%{255}%&%d::%p1%{255}%&%d%;m'

To see whether it works, run printf "\e[4:3mhello world\e[0m\n" in your shell (tested on Bash 5.2). You should see the sentence "hello world" underlined with a wavy line.

Neovim

Ensure that you are running a sufficiently new version of Neovim (undercurl support for Konsole was added in this PR on 2022-09-16).

To see whether it works, try e.g. enabling spell checking (:set spell) and ensure that your colorscheme uses undercurl for spelling errors (e.g. hi SpellBad cterm=undercurl).

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s3rvac commented Feb 24, 2024

Here is an example of how it looks in my colorscheme:

undercurl-konsole-tmux-nvim

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