Allow extended keys in tmux?

I'm trying to get tmux to pass through extended keys to my terminal. In particular Shift+Enter and Ctrl+Enter. I'm attempting to utilize this in Vim by mapping the two key combinations.

My terminal is alacritty.

The value of TERM:

• Outside tmux: TERM=alacritty
• Inside tmux: TERM=tmux-256color

I added the following configuration to alacritty to allow passing the extended keys:

[[keyboard.bindings]]
chars = "\u001B[13;2u"
key = "Return"
mods = "Shift"

[[keyboard.bindings]]
chars = "\u001B[13;5u"
key = "Return"
mods = "Control"

I've tried both of the following in my .tmux.conf, without success:

set-option -s -a extended-keys always

set -s extended-keys on
set-option -g xterm-keys on
set -as terminal-features 'xterm*:extkeys'
set-option -g allow-passthrough on

I've confirmed Shift+Enter and Ctrl+Enter work when I'm not inside of tmux.

In bash:

• Ctrl+V Ctrl+Enter outputs ^[[13;5u
• Ctrl-V Shift+Enter outputs ^[[13;2u

In vim:

• nnoremap <C-Enter> iCtrl-Enter pressed^[ works
• nnoremap <S-Enter> iCtrl-Shift pressed^[ works

In tmux the above keystrokes output nothing. The mappings also don't work in vim when run in tmux.

How can I allow extended keys while in tmux?

posted 6 months ago

CC BY-SA 4.0

6mo ago

rcmosher‭

21 reputation 1 0 4 1