aosp12/external/libxkbcommon

libxkbcommon

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 library for listing available keyboard layouts.

Quick Guide

See Quick Guide.

Building

libxkbcommon is built with Meson:

meson setup build
ninja -C build

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
ninja -C build

API

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.

Dataset

libxkbcommon does not distribute a keymap 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. More information on xkeyboard-config is available here: https://www.freedesktop.org/wiki/Software/XKeyboardConfig

The dataset for Compose is distributed in libX11, as part of the X locale data.

Relation to X11

See Compatibility notes.

Development

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

• Daniel Stone daniel@fooishbar.org
• Ran Benita ran@unusedvar.com

Credits

Many thanks are due to Dan Nicholson for his heroic work in getting xkbcommon off the ground initially.