Hash :
6881fb32
Author :
Date :
2025-04-01T08:28:02
xkbcomp: Drop trailing NoSymbol and NoAction()
This brings us closer to what `xkbcomp` outputs. One should use
the explicit `VoidSymbol` instead of `NoSymbol`, in order to avoid
dropping empty levels.
This may affect keys that rely on an *implicit* key type. Example:
- Input:
```c
key <> { [a, A, NoSymbol] };
```
- Compilation with xkbcommon \< 1.9.0:
```c
key <> {
type= "FOUR_LEVEL_SEMIALPHABETIC",
[a, A, NoSymbol, NoSymbol]
};
```
- Compilation with xkbcommon ≥ 1.9.0:
```c
key <> {
type= "ALPHABETIC",
[a, A]
};
```
libxkbcommon is a keyboard keymap compiler and support library which processes a reduced subset of keymaps as defined by the XKB (X Keyboard Extension) specification. It also contains a module for handling Compose and dead keys and a separate registry library for listing available keyboard layouts.
libxkbcommon is built with Meson:
meson setup build
meson compile -C build
meson test -C build # Run the tests.
To build for use with Wayland, you can disable X11 support while still using the X11 keyboard configuration resource files thusly:
meson setup build \
-Denable-x11=false \
-Dxkb-config-root=/usr/share/X11/xkb \
-Dx-locale-root=/usr/share/X11/locale
meson compile -C build
While libxkbcommon’s API is somewhat derived from the classic XKB API as found
in X11/extensions/XKB.h and friends, it has been substantially reworked to
expose fewer internal details to clients.
See the API Documentation.
libxkbcommon does not distribute a keyboard layout dataset itself, other than for testing purposes. The most common dataset is xkeyboard-config, which is used by all current distributions for their X11 XKB data. Further information on xkeyboard-config is available at its homepage and at its repository.
The dataset for Compose is distributed in libX11, as part of the X locale data.
See Compatibility notes.
An extremely rudimentary homepage can be found at
https://xkbcommon.org
xkbcommon is maintained in git at
https://github.com/xkbcommon/libxkbcommon
Patches are always welcome, and may be sent to either xorg-devel@lists.x.org or wayland-devel@lists.freedesktop.org or in a GitHub pull request.
Bug reports (and usage questions) are also welcome, and may be filed at GitHub.
The maintainers are:
Many thanks are due to Dan Nicholson for his heroic work in getting xkbcommon off the ground initially.