Map scancode to KeyCode

[estin]

Hi! It's an optional solution to use a keyboard scancode.

Based on the comment: #165 (comment)

And on: #10228
 
Introduced the new feature scancode to enable the following logic:

• on command  and jump-to-word modes query keyboard pressed scancode  via keyboard_query
• map scancode to key and build a new KeyEvent and pass it back.

It isn't required to change user keymap configurations.
 

cargo install --features scancode --locked --path helix-term

 

Config

[editor.scancode]
layout = "qwerty" # from pre-configured defaults
# layout = "myconfig"  # user defined config

# user personal config
[editor.scancode.map]

# [scancode, [key, shifted key]]
myconfig = [
  [1, ["esc"]],
  [2, ["1", "!"]],
  [3, ["2", "@"]],
  [4, ["3", "#"]],
  [5, ['4', '$']],
  [6, ['5', '%']],
  [7, ['6', '^']],
  [8, ['7', '&']],
  [9, ['8', '*']],
  [10, ['9', '(']],
  [11, ['0', ')']],
  [12, ["-", "_"]],
  [13, ['=', "+"]],
]

  

And it works well on my setup (linux/x11 and qwerty keyboard).

I tried to implement it in a separate module and simplify the API as an optional helix feature.

Such an approach as the compilation flag for "desktop" Helix users is the right way?

  

[estin]

New option - read scancode via evdev

cargo install --path helix-term  --features scancode-evdev --locked

And previous way via keyboard_query

cargo install --path helix-term  --features scancode-query --locked

feature	crate	linux (x11)	linux (wayland)	windows	macos
scancode-evdev	evdev	yes	yes	no	no
scancode-query	keyboard_query	yes	no	?	?
scancode-hidapi	hidapi	yes	yes	?	?

• no not supported
• yes works, tested
• ? must works, not tested

P.S. In plans try to read keyboard scancodes via libusb/hidapi

UPDATE

New variant to read keyboard events - use hidapi (on Linux /dev/hidrawX must be allowed to read)

cargo install --path helix-term  --features scancode-hidapi --locked