e68bb27df2
We started listening to "notify::position" on surface actors with commit 08e4cb54. This commit was done to fix a regression from commit cf1edff9, which forgot to handle some cases like the actual WindowActor and not the SurfaceActor (which is a child of the WindowActor) moving (that was fixed by listening to MetaWindows "position-changed" signal). Also that commit introduced meta_wayland_surface_update_outputs_recursively(), which updates the outputs of all (sub-)surfaces in case any position changed and made sure subsurfaces also get their outputs updated in case the parent actor moved. Connecting to the "notify::position" signal, which the above commit also did is now superflous though because position changes will queue a relayout and the actors allocation will change during the next allocation cycle, notifying the "allocation" property which we also listen to. So save some resources and stop listening to that signal. https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1235
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 af 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.
The coding style used is primarily the GNU flavor of the GNOME coding
style
with some minor additions such as preferring stdint.h types over GLib
fundamental types, and a soft 80 character line limit. However, in general,
look at the file you're editing for inspiration.
Commit messages should follow the GNOME commit message guidelines. We require an URL to either an issue or a merge request in each commit.
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.