Implement experimental input method protocol

[dcz-self]

With popup additions: https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/407

Missing/untested: repositioning.

[dcz-self]

To test:

• anvil from Add xx_input_method_v1 support. smithay#1745
• stiwri from "popup" branch https://codeberg.org/dcz/stiwri/src/branch/popup

# in anvil
cargo run --release -- --winit &
WAYLAND_DISPLAY=wayland-1 yad &
# in stiwri
WAYLAND_DISPLAY=wayland-1 cargo run --release --bin im_popup

[dcz-self]

Repositioning has been tested now:

WAYLAND_DISPLAY=wayland-1 cargo run --release --bin im_popup_reposition

Screencast_20250524_202116.webm

[wash2]

I'm not sure that I understand the difference in the protocol. The preedit text is just removed in the case that it is present, and otherwise it works the same, right?

[dcz-self]

No, the preedit is not affected by this. That's actually a mistake, I should have typed "surrounding_text". When the surrounding text is reported, this can count bytes to arrive at the right spot. When it's not reported, the input method has no way to know what it deletes.

[dcz-self]

Bump. Anyone interested?

[wash2]

Hi, sorry for the delayed response. Are you planning on depending on https://github.com/Smithay/wayland-rs for the protocol, instead of your repository? I think it otherwise looks good.

[dcz-self]

Thank you for reminding me, I lost the notification for a couple days. I updated the dependency now.