54febd1419
MetaWindowActor breaks layering isolation by accessing and injecting itself into compositor->windows. This is a bad practice, and effecticely makes returning the new actor useless, since we doesn't even use the return value. Move window actor creation to under MetaCompositor and stop violating (too badly) the resposabilities of each component. This moves meta_window_actor_new() into meta_compositor_add_window(). Also, move the remaining initialization code to the GObject.constructed vfunc. https://gitlab.gnome.org/GNOME/mutter/merge_requests/368
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.
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.