Author :
Pierre Le Marre
Date :
2025-10-17 11:57:53
Hash :939bf0e1 Message :xkbcomp: Never drop X11 canonical key types
There are 4 mandatory *canonical key types* in the XKB protocol:
- `ONE_LEVEL`
- `TWO_LEVEL`
- `ALPHABETIC`
- `KEYPAD`
They are always present in the keymap generated from xkeyboard-config.
But since 31900860c65b88e4d10ad7dd00377e2815cca0f6 we drop unused key
types by default, which may happen for the types hereinabove with e.g.
4+ level layouts like `es`.
In theory these types are automatically filled by libX11 if missing,
but there are some bugs in the X11 ecosystem that prevents the keymap
to be properly uploaded in the X server, leading to errors when
retrieving it with libxkbcommon-x11. See:
https://gitlab.archlinux.org/archlinux/packaging/packages/libxkbcommon/-/issues/3
The following fixes were filed to fix the issues:
- https://gitlab.freedesktop.org/xorg/lib/libx11/-/merge_requests/292
- https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2082
- https://github.com/xkbcommon/libxkbcommon/pull/871
However it’s not clear when new versions of libX11 and xserver will be
released. So this commit is a hack to ensure that we do not drop the
XKB canonical key types, as an effort to reduce breakage.
WARNING: contrary to `xkbcomp`, we do not supply these types if they
are missing, because a keymap that uses them (explicitly `type="…"` or
implicitly with automatic types) without providing them is considered
buggy. The only exception is if no key type is provided, a default one-
level type `ONE_LEVEL` is provided and assigned to all keys.
Pierre Le Marre