Wayland input handling

[witelokk]

Adds initial keyboard and mouse input for Wayland (thanks to @gabydd and @kvark for reference).

Release Notes:

• N/A

[witelokk]

So for now:

• double/triple clicks don't work (it is quite tricky to implement as it requires buffering mouse events and detect single/double/triple clicks based on timings)
• holding keys doesn't work
• shortcuts generally work though for some shorcuts (ig unbinded) it types key name instead
• ime not implemented (don't even know what it is)
• scrolling is a bit sluggish
• touch inputs are not implemented
• other things should work

[mikayla-maki]

Thank you!

[jansol]

@witelokk IME stands for Input Method Editor, i.e. the mechanism that lets you input more complex text than the keyboard can handle directly. You might be familiar with the macOS "press-and-hold for accented characters", that uses this mechanism. Aside from that, CJK text is generally entered with an IME (you can see how that works e.g. on google translate by setting the input language to Japanese, activating the input method by clicking the あ icon and typing "sushi" in the input box). I think dead keys / compose key input might also be handled via the IME mechanism?

[teohhanhui]

Is there a reason why libinput is not being used?

https://wayland.freedesktop.org/libinput/doc/latest/index.html

[rajveermalviya]

Is there a reason why libinput is not being used?

https://wayland.freedesktop.org/libinput/doc/latest/index.html

libinput isn't supposed to be used by wayland clients, it's for wayland compositors. wayland clients receive input events via wl_keyboard, wl_pointer, wl_touch events.

And for IME, there's https://wayland.app/protocols/text-input-unstable-v3.

[davidsmfreire]

I'm willing to help implement shortcuts. Could someone link me a Discord server where discussion for linux contributions is happening? Thank you.

[witelokk]

I'm willing to help implement shortcuts. Could someone link me a Discord server where discussion for linux contributions is happening? Thank you.

Shortcuts do actually work, but there's no Linux keymap yet. For Discord, there's a link in gpui crate README.