bac66fcbc4
We'll soon introduce a new gesture tracking framework which heavily depends on ClutterActions seeing all events of a sequence. For this to work, a larger change to event delivery is needed: Implicit grabbing of all events for button and touch press->motion->release sequences to ensure ClutterActions continue receiving events for the whole sequence. This commit takes care of that: At the start of an event sequence we collect all the event-handling actors and actions to a GArray that lives in the PointerDeviceEntry, and then deliver all events belonging to that sequence to the same actors/actions until the sequence ends. To avoid events getting pulled from under our feet when mutters event filter returns CLUTTER_EVENT_STOP, this also introduces private API (maybe_lost_implicit_grab()) on ClutterStage so that we can't end up with stale sequences. Note that this also slightly changes behavior when it comes to event delivery to actions: Because we now store actions separated from their actors, any action returning CLUTTER_EVENT_STOP now stops event propagation immediately. That was different before, where we'd emit events to all actions of the actor and only then stop propagation. Note that this isn't handling ClutterGrabs correctly right now, this will be a little tricky, so we'll take care of that in a future commit. To handle actors getting destroyed or unmapped during a grab, listen to notify::grab on the deepmost actor in the implicit grab tree. This gives us a notification when any actor inside the tree goes unmapped. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2342> |
||
|---|---|---|
| .gitlab/issue_templates | ||
| .gitlab-ci | ||
| clutter | ||
| cogl | ||
| data | ||
| doc | ||
| meson | ||
| po | ||
| src | ||
| subprojects | ||
| tools | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| check-style.py | ||
| config.h.meson | ||
| COPYING | ||
| HACKING.md | ||
| meson_options.txt | ||
| meson.build | ||
| mutter.doap | ||
| NEWS | ||
| 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:
- Meta: https://gnome.pages.gitlab.gnome.org/mutter/meta/
- Clutter: https://gnome.pages.gitlab.gnome.org/mutter/clutter/
- Cally: https://gnome.pages.gitlab.gnome.org/mutter/cally/
- Cogl: https://gnome.pages.gitlab.gnome.org/mutter/cogl/
- CoglPango: https://gnome.pages.gitlab.gnome.org/mutter/cogl-pango/
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.