C-backspace = "delete_word_backward" doesn't work, should be fixed in Crossterm 0.25

[David-Else]

Summary

In my config:

C-backspace = "delete_word_backward"

Does nothing in Kitty and Gnome Terminal. Crossterm 0.25 added functional key codes from the Kitty keyboard protocol https://github.com/crossterm-rs/crossterm/releases/tag/0.25 , so it should at least work for Kitty. @groves I think they need to be enabled?

(Works in Neovim with vim.keymap.set('i', '<C-H>', '<C-W>'))

Platform

Linux

Terminal Emulator

Kitty

Helix Version

22.08.1

[archseer]

Should be easy to do:

use std::io::{Write, stdout};
use crossterm::execute;
use crossterm::event::{
    KeyboardEnhancementFlags,
    PushKeyboardEnhancementFlags,
    PopKeyboardEnhancementFlags
};

let mut stdout = stdout();

execute!(
    stdout,
    PushKeyboardEnhancementFlags(
        KeyboardEnhancementFlags::DISAMBIGUATE_ESCAPE_CODES
    )
);

// ...

execute!(stdout, PopKeyboardEnhancementFlags);

But not sure if crossterm does all the detection needed for progressive enhancement: https://sw.kovidgoyal.net/kitty/keyboard-protocol/#detection-of-support-for-this-protocol

Windows implementation seems to always return an error too so we'd need to specially handle that by ignoring the error