
In process_iso_next_group(), we would use try to match mask and keycode of ISO_Next_Group to tell whether the key combo has been activated. That works on X11, but not on Wayland with the native backend, because the keycode does not match. But we do not need to go all through that burden to match the key combo we could just use the keysym instead, which would work even when there is no physical key for ISO_Next_Group. All we need to do is check whether the symbol is ISO_Next_Group and the modifier mask matches, which simplifies the code as well. (Note that we still need to keep the resolved iso_next_group_combo key combo around because the X11 backend grabs that key combo.) Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/3883 Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4232>
Mutter
Mutter is a Wayland display server and X11 window manager and compositor library.
When used as a Wayland display server, it runs on top of KMS and libinput. It implements the compositor side of the Wayland core protocol as well as various protocol extensions. It also has functionality related to running X11 applications using Xwayland.
When used on top of Xorg it acts as a X11 window manager and compositing manager.
It contains functionality related to, among other things, window management, window compositing, focus tracking, workspace management, keybindings and monitor configuration.
Internally it uses a fork of Cogl, a hardware acceleration abstraction library used to simplify usage of OpenGL pipelines, as well as a fork of Clutter, a scene graph and user interface toolkit.
Mutter is used by, for example, GNOME Shell, the GNOME core user interface, and by Gala, elementary OS's window manager. It can also be run standalone, using the command "mutter", but just running plain mutter is only intended for debugging purposes.
Contributing
To contribute, open merge requests at https://gitlab.gnome.org/GNOME/mutter.
It can be useful to first look at the GNOME Handbook and the documentation and API references below first.
Documentation
- Coding style and conventions
- Git conventions
- Code overview
- Building and Running
- Debugging
- Monitor configuration
- Multi-GPU
API Reference
- Meta: https://mutter.gnome.org/meta/
- Clutter: https://mutter.gnome.org/clutter/
- Cogl: https://mutter.gnome.org/cogl/
- Mtk: https://mutter.gnome.org/mtk/
Meetings
There are recurring meetings to discuss development of GNOME Shell, mutter and related components.
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.