Commit Graph

326 Commits

Author SHA1 Message Date
Jonas Dreßler
7f90a46f8c workspacesView: Clip the SecondaryMonitorDisplay instead of the view
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>
2021-05-04 14:16:46 +00:00
Florian Müllner
dd7d336228 workspacesView: Don't tie PgUp/PgDown to mapped state
Both app grid and window picker are now always visible in the overview,
so their handling of the PgUp/PgDown keys conflicts.

Resolve that by checking for the overview state instead.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1798>
2021-04-08 20:48:58 +02:00
Florian Müllner
fc54e0bed8 workspacesView: Fix PgUp/PgDown shortcut
We still try to switch to the workspace above/below, which doesn't
do anything since the layout is now horizontal.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1798>
2021-04-08 20:48:58 +02:00
Jonas Dreßler
9152d6613b workspacesView: Store some variables outside the children-allocate loop
We've seen this to help quite a bit with performance previously, so also
do it here.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1755>
2021-03-13 22:13:25 +00:00
Alexander Mikhaylenko
df4c05f834 swipeTracker: Pass orientation in constructor
When this class was written, all swipes in the shell were vertical, so it
made sense to make the default orientation vertical. This isn't the case
anymore, thus pass make it mandatory to specify orientation when creating
a tracker.

Change the property default values to horizontal as well to match Clutter
instead of the old shell design.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1731>
2021-03-13 18:08:24 +00:00
Jonas Dreßler
9b9be4a1a5 workspace: Decrease spacing between workspaces in the window picker
Use a bit less spacing between the workspaces in the window picker, this
uses more of the available space and makes it easy to take a peek at
adjacent workspaces.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1702>
2021-03-03 12:08:58 +00:00
Florian Müllner
260f5b0b8d workspacesView: Add minimap on secondary monitors
The workspace minimap is much less prominent than the old workspace
switcher, and serves primarily as an indicator.

That means that duplicating it on secondary monitors (if workspaces
on non-primaries are enabled) is harder to mistake for per-monitor
workspaces, so make some people happy by including the minimap on
every monitor.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1735>
2021-03-02 21:56:30 +00:00
Florian Müllner
082eedd968 workspacesView: Decrease workspaces size on external monitors
Now that the backgrounds was moved into workspaces, the fullscreen
views on secondary monitors are visually inconsistent with the
primary view, as there's no dash or search entry that reduces the
available height and allows adjacent workspaces to peek in.

Address this by adding padding above and below the view, so that
it is limited to 70% of the available height.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1735>
2021-03-02 21:56:30 +00:00
Florian Müllner
a8e6403045 workspacesView: Split out SecondaryMonitorDisplay
Right now the handling of external monitors is relatively simple, and
consists of putting either an extra workspace or a full view on the
monitor, depending on the workspaces-only-on-primary setting.

We are about to tweak the behavior on secondary monitors, prepare for
that by splitting out an intermediate actor that manages the views on
non-primaries.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1735>
2021-03-02 21:56:30 +00:00
Florian Müllner
40121bbe4b workspacesView: Center extra workspace
At the moment views on non-primary monitors take up the entire work area,
so simply allocating the available size works. However we'll soon shrink
the views a bit to match the visuals on the primary monitor. As workspaces
keep the ratio, reducing their height will also reduce the width; override
the default allocate() to keep the extra workspace horizontally centered.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1735>
2021-03-02 21:56:30 +00:00
Jonas Dreßler
63a96a7111 workspacesView: Take scale factor into account to calculate spacing
This is a statically defined size and we need to adjust for scaleFactor
ourselves, so do that and multiply those two values by the scale factor.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1701>
2021-02-21 16:25:17 +00:00
Georges Basile Stavracas Neto
9d4f017248 workspacesView: Only clip non-primary workspace views
The primary workspace is displayed in the overview, and clipping it
ends up clipping the shadows too. Since Overview's ControlsManager
itself clips to allocation, no windows in the primary monitor spill
to other monitors. However, not clipping non-primary monitors might
end up in situations where their windows spill into the primary one.

Make sure to only clip workspace views of non-primary monitors.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1691>
2021-02-21 15:47:12 +00:00
Georges Basile Stavracas Neto
ac6337848f workspacesView: Disable mouse drag to switch workspaces
During the user research, it was found that users would instinctively
drag the workspace horizontally but would often, in the process,
accidentally drag a window.

Disable dragging workspaces using the cursor for now.

Fixes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3742
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1694>
2021-02-18 09:43:02 -03:00
Carlos Garnacho
f69727464c workspacesView: Initialize/update swipe orientation before gesture
Separate this logic from _switchWorkspaceBegin() and ensure it is set
before this call. The SwipeTracker code uses the orientation to determine
whether the gesture should begin at all, so changing the orientation on
gesture begin was a bit too late.

But also, that meant the SwipeTracker was left at the default orientation,
which was vertical (unlike workspaces, and like the overview gesture).
This made both swipe trackers try to handle the same swipe, with the
WorkspacesView being doubly unfortunate (for triggering in the first place,
and for happening after the other gesture did queue relayouts on it).

Taking this logic outside of _switchWorkspaceBegin() and having the right
orientation beforehand results in both gestures looking for their direction,
and not meddle with each other.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1643>
2021-02-17 14:06:11 +01:00
Carlos Garnacho
a498d8577e workspacesView: Check for primaryView being null
This is possible according to the getter, and triggers warnings
seen when going back from overview via gestures.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1643>
2021-02-17 14:06:11 +01:00
Sebastian Keller
8d5fb73695 workspacesView: Don't invalidate allocation before using it for gesture
Calling startTouchGesture() on the workspacesViews can change the
visibility of the workspaces if not all of them are already shown, such
as when there are more than 3 workspaces or for 3 workspaces if we are
not on the central one. This invalidates the allocation and the width
used as distance for the gesture would become 0, resulting in drag
gestures immediately jumping to the first or last workspace due to a
division by 0.

Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3721

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1682>
2021-02-16 03:50:52 +01:00
Georges Basile Stavracas Neto
2e817d3fa8 workspace: Always leave overview when in app grid state
The behavior of workspaces is different depending on whether
the overview is in window picker state, or app grid state.

When in window picker state, clicking on adjacent workspaces
should only activate them, without hiding the overview; and
clicking on the active workspace hides the overview. When in
app grid state, clicking on a workspace must always hide the
overview.

Pass the overview adjustment to Workspace, and leave overview
if the overview state is bigger than WINDOW_PICKER.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1645>
2021-02-11 17:21:48 +00:00
Georges Basile Stavracas Neto
bf1fa3879f workspacesView: Interpolate against relative workspace boxes
The overview transition consists of getting the initial and final
states of the overview adjustment, derivating various other internal
states from them (such as the fit mode, opacities, translations, etc),
and finally interpolating the allocation boxes.

When interpolating between the fit mode, WorkspacesView uses the current
allocation box to derivate the SINGLE and ALL fit mode boxes. However,
that creates a curved path during overview transitions. What we really
want to do here is calculate the fit mode box relative to the corresponding
overview state. For example:

 +----------------+----------+------------------------+
 | Overview State | Fit Mode | Workspaces geometry    |
 +----------------+----------+------------------------+
 | HIDDEN         | SINGLE   | Cover entire screen    |
 | WINDOW PICKER  | SINGLE   | Between minimap & Dash |
 | APP GRID       | ALL      | 15% screen height      |
 +----------------+----------+------------------------+

Using the table above as the reference, when the overview transitions
between WINDOW PICKER and APP GRID, we must interpolate between
(SINGLE fit mode @ between minimap & Dash) and (ALL fit mode @ 15% screen
height). That way, we always interpolate the final boxes, which corrects
the odd path that workspaces follow during this transition.

Make the WorkspacesView of the primary monitor use these cached boxes
when the overview is in the middle of a transition, and the fit modes of
the initial and final state differ, to calculate the workspaces positions.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1624>
2021-02-11 15:50:31 +00:00
Georges Basile Stavracas Neto
ca066a4ba6 workspacesView: Use calculated workspace state for progress
It works just like before, except that this has the nice side effect
of not changing the workspace mode when leaving the overview from
the app grid state.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1624>
2021-02-11 15:50:31 +00:00
Georges Basile Stavracas Neto
a9f11b1f5a workspacesView/workspacesDisplay: Remove parent opacity hack
Now, we set WorkspacesDisplay's opacity directly, so there's no
need to have this parent → child glue code anymore. Remove it.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1624>
2021-02-11 15:50:31 +00:00
Georges Basile Stavracas Neto
c09c070b15 overviewControls: Incorporate ActivitiesContainer
Move AppDisplay, WorkspacesDisplay, and ThumbnailsBox from ViewSelector to
ControlsManager. This allows to always allocate the correct size for AppDisplay,
and will enable for a plethora of further improvements. The end goal is to
completely remove ViewSelector, and let ControlsManager handle the layout of
everything that's visible in the overview.

For now, replace the apps page with a dummy actor in ViewSelector.

Adjust various callers around the codebase to not access the ViewSelector
directly from the overview anymore.

Bind the opacity of the primary workspace to WorkspaceDisplay's opacity. This
allows removing the parent opacity hack in place, which will be done by the
next commit.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1624>
2021-02-11 15:50:31 +00:00
Georges Basile Stavracas Neto
22f4a6b7f6 workspace, workspacesView: Cleanup animation methods
Remove Workspace.zoomTo/FromOverview(), they're unused now. Rename
everything up to ControlsManager to prepareToEnter/LeaveOverview(),
since these classes don't run the animation anymore.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1624>
2021-02-11 15:50:31 +00:00
Georges Basile Stavracas Neto
d221215ab6 workspacesView: Derive workspace mode from overview state
WorkspacesView uses the floating layout when the overview is in window
picker mode, and the session layout when the overview is in app grid
mode. Up until now, the fit mode adjustment was used to derive the
workspace mode, but it is incomplete as it doesn't have the full range
of workspace states.

Make ViewSelector cascade the overview adjustment to WorkspacesDisplay,
and use the overview adjustment itself to derive the workspace mode.

Extra workspaces don't have to account for the fit mode, and thus are
basically a clamp(state, 0, 1) of the overview state. However, don't
call animateTo/FromOverview() anymore, since they ease the workspace
mode adjustment.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1624>
2021-02-11 15:50:31 +00:00
Florian Müllner
741d6abb97 workspacesView: Add primary view to workspaces display
Boy, does this commit feel good.

While the workspaces view on the primary monitor *appears* as part of
the overall overview hierarchy, this hasn't actually been the case
until now. We synchronized its size and (stage) position to match
the workspaces display, but actually kept in a separate layer for
the transitions to and from the overview.

But now that the new layout manager slides out completely during the
overview transitions, the workspaces display starts out covering the
entire work area, which is exactly what we need for the transition.

So finally stop faking it, and actually make the primary workspaces
view a child of the workspaces display.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1624>
2021-02-11 15:50:31 +00:00
Georges Basile Stavracas Neto
b6337a7bf1 overviewControls: Ease main adjustment when animating to/from overview
Instead of delegating it to ViewSelector, make the transition to and from
overview ease the main state adjustment.

This commit temporarily breaks these animations, but on the other hand
introduces an important feature: ViewSelector is always allocated to the
actual size. This will finally allow for adding WorkspacesView as a child
of WorkspacesDisplay, and finally remove the actual geometry hack, which
is what next commit is about.

This commit also effectively reverts b64103efc.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1624>
2021-02-11 15:50:31 +00:00
Abderrahim Kitouni
9aae1df7a6 workspacesView: Fix off-by-one error
This is basically 9f0e7632a6 ported over ed1170906b which was dropped this
fix when copying things around.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1655>
2021-02-09 09:40:29 +00:00
Alexander Mikhaylenko
2b9cf73309 workspacesView: Enable long swipes
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1647>
2021-02-08 22:20:26 +00:00
Florian Müllner
26a39bdf78 workspacesView: Move workspace scroll code to windowManager
This will allow sharing the code for the new super-scroll functionality.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1612>
2021-02-04 20:04:15 +00:00
Georges Basile Stavracas Neto
1adcbaab46 workspacesView: Derive workspace state from fit mode
Derive the workspace state WorkspacesView's workspaces from the fit mode.
Extra workspaces still run the zoom animations as before.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1613>
2021-02-03 20:30:30 +00:00
Georges Basile Stavracas Neto
4cf5b4a6d8 workspacesView: Scale inactive workspaces
As per the latest mockups, then horizontally snapping, the active
workspace should be highlighted. Because WorkspacesView clips to
allocation, we cannot simply scale up the active one. Instead,
scale down the inactive ones.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1613>
2021-02-03 20:30:30 +00:00
Georges Basile Stavracas Neto
b64103efca workspacesView/workspacesDisplay: Don't sync geometry when animating
Synchronizing the actual geometry while animating from / to the overview can
break the animation. Let's prevent that. This code will go away soon anyway,
but to not lose bisectability, it's better not to leave it misbehaving until
then.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1613>
2021-02-03 20:30:30 +00:00
Georges Basile Stavracas Neto
ed1170906b workspacesView: Center active workspace in allocation
When vertically snapping, WorkspacesView currently allocates workspaces
side-by-side, then applies an extra step of translation to center to
the active workspace. This extra step, however, gets in our way because
now we need tighter control of the workspaces positions in allocation,
in order to properly interpolate them.

Move the translation of workspaces to the allocation code itself, and
remove the extra translation step.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1613>
2021-02-03 20:30:30 +00:00
Georges Basile Stavracas Neto
1359b272a4 viewSelector: Tie workspace fit mode to adjustment
Tie the fit mode adjustment of WorkspacesDisplay to the
state adjustment of AppPagesContainer, and transition to
the ALL fit mode when the app grid is visible.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1613>
2021-02-03 20:30:30 +00:00
Georges Basile Stavracas Neto
26c5434222 workspacesView: Use side-by-side layout
Currently, WorkspacesView positions each workspace on a
per-page layout, each page with the allocated width and
height of WorkspaceView. This layout doesn't work well
with horizontal workspaces.

Layout workspaces side by side, instead of per page. The
layout is influenced by a "fit mode", which reflects the
different behaviors exposed in the mockup. This fit mode
represents whether a single or all workspaces will fit
available geometry.

The single fit mode is always used for now. Next commits
will make it switch to the all fit mode when in the app
grid state.

The translation_{x,y} also needed to reflect the switch to
a side-by-side layout, and use the geometry of the workspaces
to determine the offset. Notice that, when the fit mode is ALL,
there's no translation applied.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1613>
2021-02-03 20:30:30 +00:00
Florian Müllner
3abfc25858 workspacesView: Always use ZOOM transition
Workspaces are now always shown, so the code path to fade windows
instead of zooming out is dead now; remove it.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1613>
2021-02-03 20:30:30 +00:00
Abderrahim Kitouni
698e67c486 workspacesView: Fix scroll direction in RTL locales
Scrolling up or down (using the mouse wheel) should scroll to right
or left respectively (rather than the other way around).

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1608>
2021-01-30 11:45:22 +00:00
Georges Basile Stavracas Neto
8eb81ae649 overview: Move background to Workspace
Move the background to the Workspace class by introducing a new container
called WorkspaceBackground, which handles clipping the background to the
workarea.

Move the click action from WorkspaceDisplay into each workspace.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1599>
2021-01-29 21:56:05 +00:00
Georges Basile Stavracas Neto
a29e002a41 workspacesView: Add API to hide workspaces without destroying
This will be used by the next commit to hide workspaces when ViewSelector
switches to the search page, without destroying the workspaces so their
state is preserved.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1593>
2021-01-29 15:01:03 +00:00
Georges Basile Stavracas Neto
08ac3c7750 workspacesView/workspacesDisplay: Handle smooth events
On X11, the scroll handler can receive smooth events, which should
trigger a workspace switch. Handle smooth events by checking their
scroll delta, and adjusting the direction depending on these deltas.

Fixes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1614
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1603>
2021-01-28 15:11:56 +00:00
Georges Basile Stavracas Neto
cffad8b749 workspacesView/workspacesDisplay: Scroll on horizontal layouts
WokspacesDisplay simply remaps the scroll direction into the next
workspace, but that doesn't account for the new horizontal layout.

Scroll horizontally on horizontal layouts when scroll direction is
on the vertical axis.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1603>
2021-01-28 15:11:56 +00:00
Florian Müllner
9f0e7632a6 workspacesView: Fix off-by-one error
The scroll adjustment's upper value corresponds to the number of
workspaces, not to the last workspace index. We want the latter
when mirroring the layout in RTL locales, so subtract 1.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1598>
2021-01-26 22:07:15 +01:00
Georges Basile Stavracas Neto
eb4f6740c3 workspacesView: Center workspaces of primary display
Currently workspaces are left-aligned to the allocation, which looks
odd after moving the Dash to the bottom.

Allocate workspaces centered both horizontally and vertically.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1587>
2021-01-24 10:52:24 -03:00
Sebastian Keller
c57a299d57 workspacesView: Disable swipe tracker when animating from overview
It was possible to switch workspaces by quickly dragging the workspace
immediately after clicking on a window during the transition from the
overview. This is unlikely something that is intentionally used but can
be confusing and look bad when triggered accidentally.

Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2993

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1578>
2021-01-21 02:44:13 +01:00
Jonas Ådahl
1685c77931 workspacesView: Update scroll position but not workspace on allocate
Not updating the scroll position on allocate caused a glitch, where a
window on a workspace that is not the first one would would be
transparent for one frame when showing the overview.

Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3507
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1545>
2021-01-11 17:23:26 +01:00
Georges Basile Stavracas Neto
57f96b28ab workspacesView: Make sure to destroy non-existing workspaces
Even if they're in the end of the list. So far we've managed to not be affected
by this bug because until GNOME 3.38, workspaces didn't have a background, and
there was no way to navigate to these leftover workspaces, but with the proposed
overview changes for GNOME 40 it'll be very much visible.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1560>
2021-01-07 14:04:03 +00:00
Georges Basile Stavracas Neto
499af2dd81 workspacesView/workspacesDisplay: Ignore emulated events
When handling all scroll directions, it is imperative to ignore emulated
events. Otherwise we may get the wrong scroll direction, e.g. when natural
scrolling is enabled.

Ignore pointer emulated events in WorkspaceDisplay._onScroll().

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1560>
2021-01-07 14:04:03 +00:00
Ivan Molodetskikh
c401759c1a workspacesView: Fix copy-paste error
Calling both window-drag handlers on drag begin messes up our tracking,
and prevents the swipe tracker from being disabled during drag operations.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1551>
2020-12-27 22:12:08 +01:00
Jonas Ådahl
78d6b13c29 workspacesView: Don't update scroll position when allocating
Updating scroll position may have significant side effects, e.g.
switching workspace; this should never happen during allocation, as
we're in the middle of painting a frame. So, put it in an idle callback
if we're doing it from an allocation to have the side effects happen the
right time.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1527>
2020-12-09 22:09:39 +01:00
Florian Müllner
da36506ea5 workspacesView: Work around Clutter optimization
Clutter nowadays omits reallocations when only the stage position
changed, that is when the allocation relative to the parent changed.

As a result (apart from better performance of course), workspaces
in the overview may now end up with an outdated "actual geometry"
in case the overview moved to a new primary monitor (of equal size
as the previous one).

Work around that by emitting a signal from the overview on allocation
changes, and use that to update the cached geometry.

We can revert that change once workspaces become part of the regular
overview hierarchy.

https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3211
2020-10-05 14:11:55 +02:00
Florian Müllner
ab9aa5b1f2 workspacesView: Update workspace visibility when entering overview
This was missed in commit 96f63b08c2 when splitting the combined
layout+scrolling method into allocation and translation.

Add it back to prevent windows from other windows leaking into view
during the transition.

https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3208
2020-10-02 19:56:01 +02:00