App windows are ordered by recency, so a focus change (correctly)
triggers the ::window-changed signal. If we rebuild the section
immediately in response, the activating item will be destroyed
before the menu's ::activate handler, with the result that the
menu remains open.
Defer the section update in that case to allow the menu to process
the ::activate signal first.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1948>
For now the menu is only used in the top bar, where we can assume
that it exists "forever". This won't be the case when we start
reusing it elsewhere, so make sure we clean up after ourselves.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1948>
There is a big overlap between the app menu in the top bar and the
context menu of app icons. It makes sense to unify the two both
from a design- and from a code perspective, so split out the more
modern one into a separate module as basis for a shared class.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1948>
There was a potential issue when suspend was inhibited and immediately
uninhibited again before the creation of the inhibitor has finished.
Then the new inhibitor would be kept active.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1927>
ScreenShield::_syncInhibitor() was closing (and recreating) the
inhibitor everytime it was called, even if no change was needed.
This gets called in various places, including on property changes in
the login1 dbus object. These happen by the time logind already started
suspending at which point new inhibitors can no longer be created. It is
only waiting for existing inhibitors to be closed, so closing the
inhibitor without a new inhibitor will cause the suspending to proceed
immediately if no other inhibitors are present. This can also happen
before the lock screen is shown, which will then complete after resume.
Fix this by keeping track of the expected inhibition state and only
create or close inhibitors if there was a change to that.
Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3736
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1927>
We have initTranslations() for binding an extension's
gettext domain, but nothing to help with using gettext
from an extension.
Such help would be useful though, as an extension that
calls textdomain() like a normal application would
inadvertently changes the default domain for the whole
gnome-shell process.
Instead, extensions have to use domain-specific versions
of the gettext functions:
```js
const Gettext = imports.gettext.domain('my-extension');
const _ = Gettext.gettext;
```
Make this a bit easier by adding those functions directly
to the extensions object when initTranslations() is called,
then expose helper functions for calling them.
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2594
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1941>
The value can not actually be null at that point, but it's too
hard to spot for tools like coverity:
- before setting view, we chain up to the parent's acceptDrop()
- that calls _canAccept(), which we override and check for the view
Still, and extra ? doesn't hurt, and hopefully will make the tooling
happy.
CID 351269
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1950>
There is now a location portal that provides a similar role
as our agent. Settings supports that portal in its application
panel, which allows users to revisit their choice later.
Unfortunately it uses a different permission store table, so
any permissions granted (or denied) through our agent won't
show up there.
To change that, switch to the same table as the portal/Settings.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1945>
On startup desktop-icons-ng Wayland windows have skip-taskbar==FALSE so
initially pass `_isOverviewWindow` and they get added to the overview,
which is confusing to users. However almost immediately after that they
get `meta_wayland_client_hide_from_window_list` and are removed from
future overviews. So now we respond to `notify::skip-taskbar` immediately
and prevent desktop-icons-ng appearing in the startup overview too.
This is messy and ideally we'd like to know the window type immediately
on creation, but that option only exists in X11 and not Wayland.
https://gitlab.com/rastersoft/desktop-icons-ng/-/issues/137https://bugs.launchpad.net/bugs/1936643
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1925>
At least the last stable release of gjs has an issue with async
handlers for custom (i.e. defined in JS) GObject signals.
The handler still works, but evoking it prints the following warning:
JS ERROR: Error: Could not guess unspecified GValue type
We can avoid the warning by using the addAction() convenience
method, which makes for a small nice cleanup anyway.
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4531
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1938>
The PointerWatcher passes the current pointer position to every watch,
so we don't have to query the pointer again scrollToMousePos() is used
as watch callback.
While that should be the only use, be conservative and still query the
pointer when called without arguments.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1932>
Right now the Show Password menu is shown unconditionally for password
entries, ignoring the org.gnome.desktop.lockdown disable-show-password
key.
StShellEntry now honors that key for its peek icon, and there's little
reason for the peek icon and the menu to ever be out of sync.
This commit forces the menu and the icon to always be in sync, and
so makes the menu lock down work automatically, too.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/687>
The behavior when switching workspaces now with the touchpad gesture is
very very weird, it almost always swipes to the last workspace instead
of the next one.
So revert this change again and only swipe a single page per gesture. We
can enable long swipes again when we've figured out a proper way to
detect what the user wants (which is going to be quite challenging), see
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4355.
This reverts commit dfae3281b9.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1933>
ClutterVirtualInputDevice::notify_keyval() expects time to be in
microseconds but Clutter::get_current_event_time() returns the time in
milliseconds. On Wayland the generated event triggers all the warnings
in MetaDisplay::sanity_check_timestamps() due to the event time
seemingly being in the past.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1926>
Dragging a window preview in the overview is supposed to change the
opacity of the dragged actor. This however fails for minimized windows,
because Workspace::allocate() also changes the opacity of those. The
allocation gets triggered by removing the window actor from the
workspace when starting the drag. Avoid this by only changing the
opacity during the overview transitions.
Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4292
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1847>
At the moment user switching functionality is controlled by two
settings:
org.gnome.desktop.lockdown disable-user-switching
for the panel when the session is unlocked, and
org.gnome.desktop.screensaver user-switch-enabled
for the unlock dialog when the session is locked.
Having the lockdown setting not apply when the screen is
locked is counterintuitive.
This commit makes the unlock dialog honor both settings.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1833>
Since this is a bin and not a button, and it doesn't have any click/keyboard
handling on its own (as in that case it needs a parent button wired like in
the messages list controls), it is confusing that it has can_focus set to
True. To avoid any confusion, this commit removes it without breaking anything
since it had no real use.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1920>
This one was moved to Meta.Context as well.
I don't know why the `debugexit` command quit with an error code
(it dates back all the way to commit 98bd590a5d). Terminating on
request by the user doesn't sound like an error, so don't replicate
that particular behavior.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1917>
Before this, creating a separate instance of `Location.Indicator` failed
because it tries to create export the same DBus path.
This is useful for extensions adding panels on multiple monitors. But
it also seems like a cleaner design to separate the indicator widget
from the logically separate role as a Geoclue agent.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1919>
We build controls layout using the whole monitor vertical space as
available, however extensions or external apps in X11 may reduce the
workarea size horizontally and the shell should always take care of it.
Given that we're already assuming that the allocation is monitor-based
and that we're adjusting it to the workarea, we can just make it more
explicit by using a workarea box that is used as the allocation area.
As per this, we also apply the same logic of applied to the vertical
dimension to the horizontal one.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1892>
To compute the available height for the layout we're currently using the
panel position, while this works for the current and default setup, the
shell may be configured to use a different workarea, so we should rely on
it to compute the available space, instead of a specific widget.
So get the current monitor index for the current view and use its coordinates
instead.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1892>
The background group is currently allocated taking care of the workarea
x, y offset but not of its width/height and this may lead to building a
wrongly sized workspace view when the workarea size is not matching the
monitor size (like when there are struts set).
So, take care of the difference between the workarea and monitor
absolute end coordinates to allocate the background scaled content box.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1892>
We currently disable all network items on both the lock- and login
screen. While it makes sense to be very restrictive on the lock screen,
there are some (fringe) use cases for being more permissive on the
login screen (like remote home directories only accessible via VPN).
There's precedence with the power-off/restart actions to be less
restrictive on the login screen, and since we started respecting
the `network-control` polkit action, it's possible to restore the
old behavior if desired.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1874>
NetworkManager installs a `network-control` polkit action that can
be used to disallow network configuration, except that we happily
ignore it. Add it to the conditions that turn a network section
insensitive.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1874>
Setting up a connection for an Enterprise WPA(2) encrypted wireless
network requires Settings. That's not available when windows are
disabled via the session mode, so filter out affected entries.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1874>
The item launches the corresponding Settings panel when activated, which
doesn't work when windows are disabled by the session mode. Rather than
failing silently, turn the item insensitive.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1874>
Unaccelerated deltas make sure the gesture works the same regardless of how
fast the fingers move; this is what we were already doing for scrolling.
Remove the swipe multiplier as the deltas already match scrolling other than
the 1/10 multiplier Clutter applies to scrolling specifically.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1763>
Since commit 3fb02843, we no longer skip allocation for
results that don't fit the width, and give them a 0x0
allocation instead.
That has the unintended side effect of those children now
being available to keynav. There are cases where we want
0-sized actors to be part of the focus chain (e.g. FocusTrap),
but this isn't one of them, so explicitly exclude 0-sized
children from keynav.
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4470
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1916>
Destroying the source from an action callback will result in the
notification being destroyed twice:
- source.destroy() destroys all its notifications
- a notification destroys itself after an action
was activated
This results in unwanted log spam when attempting to dispose the
notification for a second time.
There is actually no good reason for destroying the source explicitly,
as sources already self-destruct with their last notification.
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4457
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1908>
Currently we only mark the banner as removed if it is destroyed
while in SHOWN or SHOWING state, but not if we're already HIDING
(for example in response to `NotificationBanner::done-displaying`).
If this happens, we'll try to destroy the notification again at
the end of the transition, which leads to (harmless but annoying)
log spam since Notifications were turned into GObjects (that are
disposed when destroyed).
Address this by always marking destroyed banners as removed, while
still only triggering a state update while shown (or in the process
of being shown).
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4457
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1908>
These do some some signals connection and monitor layout tracking
that we forget to disconnect when the magnifier is disconnected.
This causes warnings if enabling the magnifier, disabling it,
switching to another tty, and back. (Presumably also happens for
monitor hotplugs).
This signal should just stay connected as long as it's needed,
so add a setEnabled() method on the CrossHairs actor that we
can hook on the magnifier.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1902>
Some popovers like the ibus candidate popover may be requested while
showing an unredirected fullscreen window. Disable unredirection
while the popover is visible so that it can actually be shown.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1900>
When implementing a D-Bus method synchronously, regular JS methods are
used. That is, whatever the method returns is passed as return value
to the method invocation.
However for asynchronous implementations, we need to explicitly return
a value to the invocation, otherwise the caller will wait until it times
out eventually.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1891>
The appDisplay used to be accessible via the viewSelector, but
that is gone now. Commit c09c070b15 adjusted the code, but the
replacement uses a Main.overview.appDisplay accessor that never
existed, whoops.
Fix this by exposing a new selectApp() method directly on the
overview, so we don't have to shuffle the appDisplay through
controls → overviewActor → overview.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1891>
With Xwayland started on demand, mutter/gnome-shell will spawn Xwayland
and GNOME settings daemon Xsettings.
Currently, gnome-shell uses a timeout of 5 seconds before canceling the
launch and declare failure to start X11 services.
While 5 seconds may seem like a lot of time, when this is executed on a
virtual machine part of a QA tests under load, this causes random
failures.
There is no good value here, we could increase the timeout but it will
always remain racy. Instead, remove the timeout, systemd itself already
has a timeout mechanism (with a much longer wait time).
Thanks to Benjamin Berg <bberg@redhat.com> for finding the root cause
and suggesting the fix.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1888>
Right now we pop the modal immediately when closing, so the key-release
event of the Escape key ends up in the focus window which may consume it
for leaving fullscreen mode or similar.
We can avoid that in many cases by keeping the modal grab until the end
of the transition, as the key-release event will then likely occur while
the grab is still in place (provided animations are enabled).
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1880>
If parsing the pipeline fails for some reason, we currently end up
with a zombie session that leads to a stuck recording indicator in
gnome-shell.
Instead, properly tear down the session to allow mutter and gnome-shell
to correctly update their state.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1878>
org.freedesktop.impl.portal.desktop.gnome will be used for the
GNOME implementation of desktop portals in the future, so make
sure GNOME Shell's implementation of the access portal won't
conflict.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1872>
Another trivial cleanup. This is in preparation for next commit, that
will expand on this if clause, and will make it a bit more complicated.
Using a variable here makes it easier to read.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1866>
Often, when using multiple monitors, the thumbnails box may be
destroyed before the 'hidden' signal of the Overview is emitted,
which leaves a bunch of lingering signal connections to the
workspace manager.
Call this._destroyThumbnails() in the _onDestroy handler, which
disconnects from workspace manager. This fixes the some of the log
spam that GNOME Shell produces with backtraces of destroyed actors.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1860>
On systems/setups not using systemd, a failure to start gsd-xsettings
with NOT_SUPPORTED does not denote a failure to start Xwayland, just
that we're not using systemd.
In that case, we should just ignore the error, otherwise it will prevent
Xwayland to start on such systems/setups without systemd.
Thanks to Rose Kunkel (@rosekunkel) for spotting the issue/suggesting
the fix.
Fixes: 019229c40e - windowManager: Return failure to start X11 services
Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4284
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1850>
Currently, handling of touch devices in the app grid is a bit awkward,
paging by dragging the view can only happen if started from the gaps
between icons, trying to drag from an icon will trigger DnD, and popping
up the menu takes over it all.
Instead, have the app grid actions play this game of rock-paper-scissors:
- Fast swipes on icons trigger scrolling, beats DnD and menu
- Slower press-and-drag on icons trigger DnD, beats scrolling and menu
- Long press triggers menu, beats scrolling, is beaten by DnD
This allows quick swipes to handle navigation, while still allowing the
fine grained operations. DnD, when triggered, dismisses the menu, if
shown.
This all could probably be nicer with a more stateful gesture framework,
we're not there yet though.
Fixes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3849
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1774>
This setting (by default, 0) sets a time threshold in order to allow
DnD. If the drag is shorter than this threshold, DnD will be cancelled,
and event handling left to the next handlers.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1774>
The switcherPopups use _next() and _previous() to get the items
in the text direction. I. e. with LTR _next() gets the right item;
on RTL it gets the left item. This doesn't work well with RTL when using
the arrow keys since the text direction doesn't matter in those cases.
Pressing Left Arrow should still move left regardless of text direction.
So use the opposite methods.
Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2547
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1835>
If for some reason the xserver failed to start, mutter/gnome-shell
should not attempt to connect to the X11 display otherwise it will
lock up in XCB.
An indication of such a premature failure of the xserver is when the X11
services fail to start.
Return the status so that the caller can cancel the connection in time
and avoid the lockup of mutter/gnome-shell in case of failure.
This, however, makes the X11 services a critical component to start
Xwayland, meaning that a failure to start those services for any other
reason than the xserver failing to start would still prevent Xwayland
and therefore X11 clients to run in Wayland. This is however a lesser
issue than mutter/gnome-shell locking up.
This basically reverts commit a96753f0 - "windowManager: X11 can work
without gsd-xsettings".
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1837>
Change behavior on pressing Super+Number in Activities/Overview mode
so that the overview mode is hidden and application can be used.
This makes it consistent with clicking icon in the dash.
Closes: #4212
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1839>
Previously the workarea was only set on construction and then never
updated. As a result the preferred width and height as well as the
allocation were based on an outdated workarea size when it changed after
construction. This for example was happening during the startup
animation, for which the WorkspaceLayout is constructed before the panel
is shown. This caused the workspace in the overview to be slightly
smaller when it is first shown and the overview closing animation to
not expand the workspace to the correct size the first time it is
closed.
Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3945
Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3816
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1771>
In the nested session the startup animation sometimes fails, weirdly
that always happens to me when running a freshly built gnome-shell the
first time. The reason it fails is that mutter fails to aquire a pointer
grab from the xserver, XIGrabDevice() is unsuccessful.
A simple workaround for this race condition in the xserver is to just
grab the devices a bit later, that is after the startups animation
instead of before it.
This was also tested with disabled animations, and seems to work just as
well in that case.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1812>
Some drag actor parents might change their width to 0 after the drag
actor has been removed. If the drag is now canceled and the drag actor
is animated to return to the current parent position and scale, this
scale can not be determined and falls back to 1.0. This might be wrong
and can result in the drag actor being too large/small at the end of the
return animation.
To avoid this calculate the scale of the parent by recursively
calculating the product of its parents individual scales.
Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4017
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1790>
We want to clip the Workspace actor in the appGrid state of the overview
in order to make sure windows that overflow the monitor don't spill out.
So far we had commit b1970b95b8 for that.
Now since the last commit, window previews always slightly overflow the
allocation with their icons. That means a part of the window icon gets
clipped away as soon as the transition to the appGrid starts, which
looks weird.
Fix that bug in the transition by slightly extending the clip downwards
when animating between the window picker and the app grid state. The
extra height we extend the clip by is controlled by the overviewState,
which means we extend the clip by the full icon overlap in the window
picker state, but don't extend the clip at all when in the app grid
state.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1813>
We want to use as much space as possible for showing window previews in
the overview, and the title and close buttons of those windows are only
visible on hover, so we can show them above anything if we want.
On both primary monitors and secondary monitors, there's a certain free
space available towards the bottom edge of the monitor (on the primary
monitor we show the dash there, and secondary monitors just scale down
the Workspaces). We can make use of this by checking how much free space
there is available from the bottom edge of our allocation to the bottom
edge of the monitor, and then aligning the window previews to make full
use of this space.
So stop adding any padding to the edges of the Workspace, which will
make the windows a lot larger and completely fill the Workspaces
allocation.
The left, top and right monitor edges should always be far enough away
to accomodate the close button and hover scale-up of the window. Only
with the bottom edge of the monitor we have to be a bit more careful
(the overflowing height of the window title is quite big), so there we
check if enough free space is available. If there isn't enough free
space, we simply apply a bit of bottom padding again and shift the
window up.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1813>
Make the SecondaryMonitorDisplay a bit more similar to the
ControlsManager container on the primary monitor, and clip that widget
instead of the WorkspacesViews on secondary monitors.
This will allow us to overpaint the WorkspacesView allocation and paint
the WindowPreview overlays like the title and close button outside the
allocation with the next commit.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1813>
The current gstreamer pipeline performs quite bad on slower machines and
is dropping lots of frames, improve the pipeline by changing a few
things:
- Use threads for videoconvert and improve speed of videoconvert by
disabling some unneeded things
- Add a queue before the encoding step, this allows the encoder to work
at its own pace and will lead to a lot more stability
- Remove the fixed quantizer and only set a max quantizer, this helps
quite a bit with performance
- Change the deadline parameter of vp8enc to 1: This makes the encoder
go into real time mode, which will make it a lot faster
- Set cpu-used to 16, the maximum possible value.
- Set static-threshold to 1000, static-threshold is the motion detection
threshold, and while a value of 100 is recommended for screencasting in
the gstreamer documentation (see [1]), using 1000 appears to perform a
lot better and still outputs fairly good quality
- Set a larger buffer size than the default size, this seems to get a
bit more stability during high load scenarios
All in all, those changes make the pipeline drop no more frames when
recording at 30 FPS and 2K screen resolution. That was tested on a
fairly recent mobile core-i5 processor.
Also, because we now have two %T replacement strings for the number of
threads, we need to switch to replaceAll(). For that to work, we have to
put the %T matching expression into quotes.
[1] https://gstreamer.freedesktop.org/documentation/vpx/GstVPXEnc.html?gi-language=c#GstVPXEnc:static-threshold
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1633>
The original parent of a dragged actor might have been destroyed after
the drag has been started. When the drag is canceled and _dragOrigParent
is set, the code is trying to get the current position and size of it
when restoring. With a destroyed parent this however would result in a
crash.
This could happen for example when starting a drag on a window preview
while the overview is hiding and then releasing it once the transition
is done.
Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4024
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1817>
