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In every other device and circumstance, we update the logical focus (i.e. the surface that would be focused, if no other circumstances applied) but let the MetaWaylandInput figure out the surface that should be effectively focused, if at all. This is where we apply the actual compositor state (e.g. grabs) and result in an effective focus window. The only exception to this is `meta_wayland_seat_set_input_focus()` where the logical focus for keyboards and related devices is set, but also applied as the effective surface. We should do the same as everywhere else, and let MetaWaylandInput focus determine whether the logical focus is also the effective focus. These replaced set_focus() internal calls will happen through the default MetaWaylandEventInterface.focus implementation in MetaWaylandSeat. This resulted in keyboard focus being set on windows in circumstances it ought not to, like in the overview. Actual key events were never sent in these circumstances, but changes to modifier state could. Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/7528 Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3704>
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
API Reference
- Meta: https://mutter.gnome.org/meta/
- Clutter: https://mutter.gnome.org/clutter/
- Cally: https://mutter.gnome.org/cally/
- Cogl: https://mutter.gnome.org/cogl/
- CoglPango: https://mutter.gnome.org/cogl-pango/
- Mtk: https://mutter.gnome.org/mtk/
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.