bcdd282e9c
Relying on the content size_allocate() to determine the content position can fail in situations where the position of the content has changed, but not its size. This happens for example when the window initially is sized fullscreen height + headerbar height while not considered fullscreen yet. Then when the window is resized to just the fullscreen height and marked as fullscreen, the content size has not changed and size_allocate() is not called on the content. Thus the previous position which assumes the presence of a headerbar still applies. As a result the window is shifted down, revealing a headerbar sized area showing the gtk window background color. This issue can be avoided by using the frame's size_allocate(), which gets called in response to all relevant events, such as any headerbar size changes, headerbar visibility changes, window resizes and fullscreen status changes. Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2937 Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3608>
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.