In some cases, reparenting a window with its frame may fail; this seems
to happen especially during initialization of a window that may be
unmapped and re-mapped quickly and multiple times.
If this happens, we're never going to receive a remove event on the
stack tracker and so we may end up adding it twice to the list of the
windows to synchronize with the compositor, breaking its assumption that
the stack list is unique, and eventually leading to a crash because we
do not end up removing all the instances of a window on its destruction.
In particular we may end up in this situation:
Syncing Window 10485927: 0x555558863540 (actual xid is 10485927),
user time is 10485928 frame is 0x5555588715c0, frame xid 6291591
Syncing Window 14680081: 0x5555588664b0 (actual xid is 14680081),
user time is 14680082 frame is 0x555558871d80, frame xid 6291595
Syncing Window 6291460: 0x55555796dc80 (actual xid is 10485763),
user time is 10485764 frame is 0x555557a6f630, frame xid 6291460
Syncing Window 6291465: 0x555557a68af0 (actual xid is 14680067),
user time is 14680068 frame is 0x555557a73e80, frame xid 6291465
Syncing Window 6291509: 0x555557f9d830 (actual xid is 8388623),
user time is 0 frame is 0x555557fac780, frame xid 6291509
Syncing Window 6291586: 0x5555586e1690 (actual xid is 4194363),
user time is 0 frame is 0x55555886e550, frame xid 6291586
Syncing Window 6291591: 0x555558863540 (actual xid is 10485927),
user time is 10485928 frame is 0x5555588715c0, frame xid 6291591
Where the same meta window 0x555558863540 is added twice because that's
both mapped by the window itself (10485927) and by its frame (6291591).
This happens because for historical reasons the xids hash table managed
by the x11-display maps both the X11 windows, their frames and their
user time windows as the meta-window, and so if we don't filter out them
properly we end up duplicating the entries in the compositor list.
Such duplicates finally end up making mutter to crash in
meta_compositor_sync_stack() because we could end up trying to access
to an invalid window, given its actor has been destroyed but not all the
instances have been removed from the compositor windows list:
0x00007ffff71059 in meta_compositor_sync_stack (compositor=0x555555b8,
stack=0x555558701b80) at ../../mutter/src/compositor/compositor.c:773
773 if ((old_window->hidden || old_window->unmanaging) &&
(gdb) print old_window
$1 = (MetaWindow *) 0x0
So, in order to prevent this, check that XReparentWindow does not fail,
and in case of failure, reset the window state to the one it had before
we failed and more importantly, remove the association between the frame
X11 window and the MetaWindow, since this is not true anymore and so
that at the next stack synchronization there won't be any meta window
associated to that frame XID (unless there aren't further stack changes
impacting on that). Without this we would have instead waited for the
remove event that we predicted, but that could never happen because no
ReparentNotify is emitted in such case.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3732>
Since we listen the X events in the same thread, and they are delivered
through the main loop, there's not any need to set the frame details on
windows before the reparent operation, because such action could fail.
So move the code order, as preparation for handling the error.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3732>
That was only there to force updating MetaFrame's bounds
but that is something that is already updated in
MetaWindowX11.move_resize_internal. So just drop all of that
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3254>
Since the `switch` didn’t have a default case, the `cull_front` and
`cull_back` variables could technically be used uninitialised if the
`cull_mode` was unrecognised.
That seems unlikely to happen as presumably other code makes sure the
`cull_mode` is valid, but it doesn’t hurt to add a `default:` case to
squash the compiler warning.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3770>
Depending on whether the input mapper was found, these variables could
indeed be used uninitialised, so this is a true positive warning.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3770>
In the future, the module will automate uploading the release
tarball. We already use the CI pipeline to generate the tarball,
so it's easy to hook up the module and provide some testing
before the module goes into production.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3775>
We currently assume that the `CI_COMMIT_TAG` variable matches the
version component of the generated dist tarball.
That is usually correct, but sometimes errors happen and a wrong
tag is pushed, and the real release uses something like "46.0-real".
Account for that by building the artifact path from `meson introspect`
and exporting it as environment variable.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3775>
For a Wayland only build, we would like to avoid linking against
libXcursor which on it turn, links back to some of the X11 deps.
In order to achieve that, we include a small subset of xcursor.
In case Mutter is built with X11 or with both Wayland & X11, we link
against libXcursor and don't make use of the in-tree implementation.
This patch mimics what GTK 4 do by shipping an in-tree copy of xcursor.
Especially that libwayland-cursor does not provide an alternative to
xcursor itself.
Helps #2272
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3607>
When meta_wayland_pointer_constraint_remove() is called, it can trigger
a meta_wayland_event_handler_invalidate_focus() via:
meta_wayland_pointer_constraint_destroy()
meta_wayland_pointer_constraint_disable()
meta_wayland_input_detach_event_handler()
meta_wayland_input_invalidate_all_focus()
meta_wayland_event_handler_invalidate_focus()
Which then would result in a "focus-surface-changed" signal which would
call meta_wayland_pointer_constraint_remove() a second time. This
happens after surface_remove_pointer_constraints() has already been
called in the first meta_wayland_pointer_constraint_remove() call,
leading to "data" being NULL.
To prevent this issue disconnect the signal handler before calling
meta_wayland_pointer_constraint_disable() when destroying a constraint.
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/3476
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3749>
In case of empty regions (e.g. when locking the pointer) the pointer
was only forced to stay within the boundaries of its current pixel
(i.e. culling subpixel position), instead of the position where the
pointer lock did start.
Fixes: 07d24fe50 ("backends/native: Allow infinitely small pointer constraint regions")
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3749>
Since 07d24fe50 regions are not translated to their on-screen
coordinates anymore, but are relative to the origin stored in the
constraint. This origin however was not considered when checking whether
the pointer was within the constraint region. This meant that the
constraint region would appear to always be placed at 0,0 instead of on
the surface.
Fix this by using the cursor position relative to the origin.
Fixes: 07d24fe50 ("backends/native: Allow infinitely small pointer constraint regions")
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/3409
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3749>
We close wayland popups when a button or touch release happens outside
of the grab, except we don't want to close them when that button release is
actually the release of the press that was opening the grab in the first
place.
We never see the press event that opened the grab, so the first event we
see is actually always a release. Make sure to not close the popup on that
event, and instead only close the popup if we see the press count drop from
1 to 0.
This fixes a bug where popup would close right after they open. To
reproduce, click to open a popup, hold pressed and move the cursor over
shell chrome, then release. Or alternatively test with a popup that gets
opened with a long-press gesture (eg. long touch long press on libadwaita
tabs), just doing the touch long-press and then release.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3631>
Until this surface or its parent is finalized.
This makes sure that any `MetaWaylandSubsurfacePlacementOp` referencing
this surface for sibling will be applied as intended.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3737>
This reverts commit 35d92e0fac.
This turned out to cause trouble, because it can prevent
MetaWaylandSurface::applied_state.subsurface_branch_node from ever
getting linked up for a sub-surface.
It shouldn't be necessary anyway, since permanently_unmap_subsurface /
wl_subcompositor_get_subsurface reset the sub-surface state as defined
by the protocol.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3737>
GSettings overrides can be active and set the default value depending on
the XDG_CURRENT_DESKTOP environement variable. For the tests we run, we
rely on the default settings by using the GSettings memory backend but
we also need to make sure not overrides are in place.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3730>
because we want to switch between two workspaces. In some configurations
there is only a single workspace at this point so trying to get current
workspace + 1 gets us a NULL pointer.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3730>
