abdbc14ca8
ClutterActors new "stage-views-changed" signal fits pretty well for the updating of wl_outputs a MetaWaylandActorSurface is on: With that signal we get notified if the surface moved to a different CRTC, of which every output has at least one. So start listening to that signal, which fixes a bug where the wl_output of a surface changes, but its allocation remains the same (which means no signals triggering an update of the outputs will be emitted) and no enter/leave events for the new wl_outputs are sent to the client. This can happen when a monitor is hotplugged but the new allocation is exactly the same as the old one even though it's on a different monitor. Since the "stage-views-on-changed" signal will also get emitted when a parent actor of the surface is moved, this means we can now remove the call to meta_wayland_surface_update_outputs_recursively() on window position changes or the completion of window-effects. https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1358
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.