apprt/gtk: when text is committed, end the preedit state

[mitchellh]

Fixes #3567

ibus 1.5.29 doesn't trigger a preedit end state when text is committed. This is fixed in ibus 1.5.30, but we need to handle this case for older versions which are shipped on LTS distributions such as Ubuntu.

Every other input method engine I've tried thus far also triggers a preedit end state when text is committed, and none would expect preedit to continue after text is committed. So I think it's safe to assume that this is the expected behavior.

[tomaspinho]

Hey @mitchellh , thanks a lot for Ghostty. ❤️

1.1.0 breaks dead keys on ibus 1.5.31 in Hyprland (non-GNOME). The initial modifier character shows but the final character eats up input. Example:

`  + a = both are eaten up
´ + e = both are eaten up
¨ + space = both are eaten up

and so on...

I had to downgrade to 1.0.1. I'm running on Arch with the following:

Ghostty 1.0.1-arch

Version
  - version: 1.0.1-arch
  - channel: tip
Build Config
  - Zig version: 0.13.0
  - build mode : builtin.OptimizeMode.ReleaseFast
  - app runtime: apprt.Runtime.gtk
  - font engine: font.main.Backend.fontconfig_freetype
  - renderer   : renderer.OpenGL
  - libxev     : main.Backend.io_uring
  - GTK version:
    build      : 4.16.12
    runtime    : 4.16.12
  - libadwaita : enabled
    build      : 1.6.3
    runtime    : 1.6.4
  - libX11     : enabled

ibus versions:

pacman -Q | grep ibus
ibus 1.5.31-2
libibus 1.5.31-2

Other GTK4/Adwaita apps are working fine, so are browsers, etc. I'm running on Hyprland, but I assume this happens in other places too. I'll try GNOME and report back. EDIT: 1.1.0 works in GNOME, but not Hyprland.

So, I kept digging. The difference between GNOME and Hyprland on the same system is that Hyprland doesn't start ibus, so the changes between 1.0.3 and 1.1.0 are dependent on ibus being running. Digging further...

[tomaspinho]

So now I'm convinced the culprit of this is actually eb21a58

Some assumptions are made there regarding indirect interactions with something that is not running - ibus.

[4lm1r]

In my case, under Archlinux, I realized that pressing ALT GR before worked for me.