[BUG] Gnome Wayland, Fedora 40: Gnome keyboard shortcuts don’t work when Typing Booster has focus

[mike-fabian]

Originally reported here: https://bugzilla.redhat.com/show_bug.cgi?id=2272023

Fix attempt by Takao Fujiwara (Thank you very much!): https://src.fedoraproject.org/rpms/ibus-typing-booster/pull-request/39#request_diff

[mike-fabian]

Happens in Fedora 40 with:

mutter-46.0-1.fc40.x86_64
gnome-shell-46.0-1.fc40.x86_64

[mike-fabian]

Doesn’t happen in Fedora 39 with:

mutter-45.5-1.fc39.x86_64
gnome-shell-45.5-1.fc39.x86_64

[mike-fabian]

Workaround:

Use the option:

☑️ Avoid using the forward_key_event() function

[mike-fabian]

The attempted fix in https://src.fedoraproject.org/rpms/ibus-typing-booster/pull-request/39#request_diff is unfortunately not sufficient because this does not only happen with Gnome keyboard shortcuts involving Super (Mod4) but with any Gnome keyboard shortcuts.

For example, “Move window” is by default set to Alt+F7 and when ibus-typing-booster has keyboard focus, this does not work either unless the ☑️ Avoid using the forward_key_event() function option is used.

[fujiwarat]

Current my patch checks key.mod4 only but probably that API needs to return False with other modifier keys. I.e. if ibus-typing-booster manages Alt-F7 shortcut key with a customized shortcut key, it should be handled before the API is called.

[mike-fabian]

Current my patch checks key.mod4 only but probably that API needs to return False with other modifier keys. I.e. if ibus-typing-booster manages Alt-F7 shortcut key with a customized shortcut key, it should be handled before the API is called.

Yes, I think so too.

[mike-fabian]

Surprisingly, Gnome keyboard shortcuts without modifiers like F7 work even when the key is forwarded using forward_key_event(). Only when a modifier is involved (Shift+F7, Control+F7, Alt+F7, Super+F7,...) the Gnome keyboard shortcut does not work when ibus-typing-booster forwards the key event using forward_key_event().