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Carlos Garnacho 81c0cf0834 x11: Avoid updating focus on wayland compositor 
Reading upon the history of this code branch (commits 6891ce95dc
and 7a4c808e43 are most relevant), it seems this code is meant to
synchronize Mutter focus state taking the Xserver state as true.
That is, if Mutter tried to change the focus but something truncated
that action, Mutter focus will be changed to be in sync with the
Xserver again.

This sounds backwards in a Wayland session. Mutter focus should be
the canonical source, and not second-guessed from the current Xserver
focus window. These race conditions might still apply between X11
clients, so make these paths only apply in that case.

An example of this breaking can be reproduced with a Spotify and
Firefox window, moving the focus from the first to the second by
going to the GNOME Shell overview in between, and clicking the
Firefox window from there. The Firefox window will be raised, but
refuse to take focus.

It's unclear what made this an issue recently, perhaps commit
0e6395d932 since the now possibly ignored XI_FocusIn/Out events
affect this accounting of the Xserver focused window. Anyhow it
sounds better to ignore these paths for Wayland/native altogether.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2841>
2023-02-14 15:51:17 +00:00
.gitlab/issue_templates gitlab: Add missing < in markdown comment tag 2020-02-14 03:10:28 +00:00
.gitlab-ci ci: Only launch a single mocked D-Bus environment for all tests 2022-11-01 21:04:21 +00:00
clutter clutter: Pass source device onto crossing event generation machinery 2023-02-09 14:38:39 +01:00
cogl cogl/onscreen: Discard depth/stencil before swapping buffers 2023-02-08 15:01:34 +00:00
data Introduce the 'service channel' D-Bus service 2023-02-13 15:34:24 +00:00
doc core: Delete now unused code 2023-01-30 10:56:29 +00:00
meson build: Replace custom post-install script 2022-11-19 02:21:05 +01:00
po Update Lithuanian translation 2023-02-13 20:54:38 +00:00
src x11: Avoid updating focus on wayland compositor 2023-02-14 15:51:17 +00:00
subprojects build: Update sysprof build options 2022-12-17 19:58:00 +00:00
tools tools/get-state: Round refresh rates to three decimal places 2022-08-19 15:28:56 +00:00
.gitignore desktop: Remove obsolete desktop file 2023-02-06 15:19:17 +00:00
.gitlab-ci.yml build: Depend on glib 2.75 2023-01-30 15:11:26 +00:00
check-style.py check-style: Improve the proposed git-rebase command 2022-12-06 14:08:37 +01:00
config.h.meson xwayland: Add support for byte-swapped clients 2023-01-17 11:14:19 +01:00
COPYING Updated obsolete FSF postal address in COPYING 2014-01-12 08:44:30 +07:00
HACKING.md docs: Update coding style link 2021-11-09 19:52:14 +01:00
meson_options.txt build: Allow disabling xwayland 2023-01-03 20:45:04 +00:00
meson.build Bump version to 44.beta 2023-02-14 13:59:07 +01:00
mutter.doap mutter.doap: Add marge-bot as a maintainer 2020-11-16 11:59:45 +01:00
NEWS Bump version to 44.beta 2023-02-14 13:59:07 +01:00
README.md readme: Fix typo 2022-07-29 16:52:12 -04:00

README.md

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 look at the documentation available at the Wiki.

The API documentation is available at:

Coding style and conventions

See HACKING.md.

Git messages

Commit messages should follow the GNOME commit message guidelines. We require an URL to either an issue or a merge request in each commit. Try to always prefix commit subjects with a relevant topic, such as compositor: or clutter/actor:, and it's always better to write too much in the commit message body than too little.

Default branch

The default development branch is main. If you still have a local checkout under the old name, use:

git checkout master
git branch -m master main
git fetch
git branch --unset-upstream
git branch -u origin/main
git symbolic-ref refs/remotes/origin/HEAD refs/remotes/origin/main

License

Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.