and remove gsk_renderer_get_for_display().
This new function returns a realized renderer. Because of that, GSK can
catch failures to realize, destroy the renderer and try another one.
Or in short: I can finally use GTK on Weston with the nvidia binary
drivers again.
Signed-off-by: Emmanuele Bassi <ebassi@gnome.org>
Instead of having a gsk_renderer_set_window() call, pass the window to
realize(). This way, the realization can fail with the wrong window.
Signed-off-by: Emmanuele Bassi <ebassi@gnome.org>
We need to unrealize the children manually for that to happen, but so it
goes.
The order is necessary because we want the renderer to still be alive
while children are unrealizing.
We want to unrealize the renderer only after all widgets have been
unrealized. Otherwise, the widgets cannot release rendering resources
like textures.
and gtk_snapshot_render_frame() to be direct replacements for the
old gtk_render_*() functions.
Use them to replace Cairo usage completely in gtk_window_snapshot().
We now try to emulate cairo_t:
We keep a stack of nodes via push/pop and a transform matrix.
So whenever a new node is added to the snapshot, we transform it
by the current transform matrix and append it to the current node.
Switch code to use gdk_display_is_composited() instead.
The new code also doesn't use a vfunc to query the property but rather
requires the backend to call set_composited()/set_rgba() to change the
value.
Includes the ability to turn on updates in the inspector. Animations are
now run via a tick function which allows us to neatly overlay a
semi-transparent red rectangle and fade it out over time.
It also probably enables way more, but somebody with more UI neatness
than me needs to figure out what it eanbles first...
Before, we would immediately invalidate the GdkWindow of the widget, now
we call the parent's GtkWidgetClass.queue_draw_child() function.
This allows the parent to track redraw queueing of children.
By default GtkWidgetClass.queue_draw_child() will again chain up to its
parent while respecting the GdkWindow hierarchy for clipping.
GtkWindow is then the only widget actually invalidating the GdkWindow.
This essentially moves redraw queueing from GDK to GTK.
These complicate a lot of GdkWindow internals to implement features
that not a lot of apps use, and will be better achieved using gsk.
So, we just drop it all.
Add a new ::measure vfunc similar to GtkCssGadget's that widget
implementations have to override instead of the old get_preferred_width,
get_preferred_height, get_preferred_width_for_height,
get_preferred_height_for_width and
get_preferred_height_and_baseline_for_width.
The details of the modelview and projection matrices are only useful for
the GL renderer; there's really no point in having those details
available in the generic API — especially as the Cairo fallback renderer
cannot really set up a complex modelview or a projection matrix.
Since we use an FBO to render the contents of the render node tree, the
coordinate space is going to be flipped in GL. We can undo the flip by
using an appropriate projection matrix, instead of changing the sampling
coordinates in the shaders and updating all our coordinates at render
time.
Render nodes need access to rendering information like scaling factors.
If we keep render nodes separate from renderers until we submit a nodes
tree for rendering we're going to have to duplicate all that information
in a way that makes the API more complicated and fuzzier on its
semantics.
By having GskRenderer create GskRenderNode instances we can tie nodes
and renderers together; since higher layers will also have access to
the renderer instance, this does not add any burden to callers.
Additionally, if memory measurements indicate that we are spending too
much time in the allocation of new render nodes, we can now easily
implement a free-list or a renderer-specific allocator without breaking
the API.
We need a virtual function to retrieve the GskRenderNode for each
widget, which is supposed to attach its own children's GskRenderNodes.
Additionally, we want to maintain the existing GtkWidget::draw mechanism
for widgets that do not implement get_render_node() — as well as widgets
that have handlers connected to the ::draw signal.
And replaces its usages in GtkTextView/GtkStyleContext with a hard-coded
0.04 which was the default value for cursor-aspect-ratio. Also remove
the public gtk_draw_insertion_cursor which used draw_insertion_cursor
which in turn looked up cursor-aspect-ratio
And with it, gtk_widget_get_visual() and gtk_widget_set_visual() are
gone.
We now always use the RGBA visual (if available) and otherwise fall back
to the system visual.
The cursor was set using gdk_window_set_cursor() even in
gdk_window_new().
So instead of having yet another flag, just make the users of that flag
call gdk_window_set_cursor() directly after the window was created.
X11 was the only backend to support it and people can just override it
using XSetClassHint() directly.
The docs already advertised the function as "Do not use".
Keep the existing call to XSetClassHint() in place, so that we keep
setting the same values as in GTK3.
Setting the shadow width earlier as done with commit 4cb1b96 to address
bug 771561 proved to cause unexpected side effects on size_allocate
signal propagation.
As the window is sized correctly earlier, the size_allocate signal is
not emitted again in gtk_widget_size_allocate_with_baseline() which
prevents clutter-gtk from relocating its child widget correctly.
To avoid this issue, revert commit 4cb1b96 but make sure the values
passed as min and max size is never negative in Wayland as this is a
protocol error.
With this, the min/max size will be wrong for a short amount of time,
during the state transition, until the shadow width is updated from
gdk_window_set_shadow_width().
This approach is much safer and less intrusive than changing the
size_allocate logic in gtk.
This reverts commit 4cb1b9645e.
Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=771915
Otherwise, with CSD, we could have a discrepancy where gtk uses the
right values for the shadows whereas the gdk backend still uses the old
values, leading in some cases to invalid or negative min size being
computed (which, in Wayland, leads a protocol error).
https://bugzilla.gnome.org/show_bug.cgi?id=771561
The main corpus of the documentation for gtk_window_get_size() is still
full of X11-isms, so we should port it to something that is more
backend-agnostic. Additionally, having some examples would be nice for
application authors looking at a way to appropriately use this function.
Introduce a private API meant for abstracting how to get a handle
of a window that can be shared with other processes. The API is
async, since some implementations will require that. Currently,
only X11 is supported, which doesn't.
Based on a patch by Jonas Adahl.
This matches the behaviour of Mutter, Metacity and traditional X11
window managers on the window manager side, and is what we want
for at least gnome-terminal. I can't think of any reason why we'd
want incremental resize in any other tiled window.
Signed-off-by: Simon McVittie <smcv@debian.org>
Bug: https://bugzilla.gnome.org/show_bug.cgi?id=760944https://bugzilla.gnome.org/show_bug.cgi?id=755947
If we have an application that never goes idle (or takes a long time to
go idle), the close buttons in CSD decoration don't work properly.
While it's not clear why the usage of an idle was added in the first
place, keep on using it to avoid unexpected reentrancy problems, but
change the priority to G_PRIORITY_DEFAULT.
https://bugzilla.gnome.org/show_bug.cgi?id=768485
This partly reverts 9f5b9c0e07, which
removed the check for GtkWidget-window-dragging in the multipress
gesture. This check is still needed for widgets which have this style
property set (e.g. menubars and toolbars) can maximize the window on
double click -- but those widgets which have it set to FALSE shouldn't
maximize the window.
GtkHeadeBar checks the window type hint to determine if the regular
buttons such as menu, maximize or iconify should be visible in the
header bar.
However, an application may very well use a "normal" toplevel window and
set it transient and modal afterwards. In such a case, the iconify
button would remain visible, and the user can hide the window, but being
a modal, the parent window would remain insensitive.
Check for the window type, modality and transient relationship to decide
whether or not the regular toplevel buttons should be visible in the
header bar.
https://bugzilla.gnome.org/show_bug.cgi?id=767052
glade-previewer places a gtkwindow inside another toplevel gtkwindow,
updating the shadow width for the client induces a busy loop where the
parent will grow continuously until it crashes gnome-shell/mutter.
To avoid the loop, do not update the shadow width if not dealing with a
toplevel window.
Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=761651
Commit cdc580463e made it so that
unresizable windows can't be smaller than a set default size but it
lost the logic to ensure these windows remain at least big enough to
comply with their requisition.
https://bugzilla.gnome.org/show_bug.cgi?id=764174
While this commit was found to make emacs windows shrink (and it was
reverted in the gtk-3-20 branch for that reason), that was the only
observed breakage, while the reversal broke several of our unit tests.
Closer study of the emacs sources revealed that it does some really
unsupportable things like doing its own X event handling behind GTK+'s
back and freely mixing sizes of GtkWindows and GdkWindows obtained in
various ways. I've filed a bug against emacs with suggestions for how
to avoid the shrinking window, regardless of this commit.
Original commit message:
It seems this branch is not needed anymore. It was originally added in
1999 to support gtk_widget_realize(), but all those reasons seem
obsolete today.
Instead just call gtk_widget_realize().
If you end up at this commit when bisecting:
There is no bug that made me remove this code, it was purely meant to be
cleanup / dead code removal. I seem to have introduced a new bug or
bisecting wouldn't have let you here. So it seems we should just revert
this commit.
Some other widget might have mapped and raised another child window of
the toplevel in the meantime, causing the popover window to be covered.
Raise the popover window to avoid the issue.
Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=763627
Some applications set both a default size on their gtk window and a size
request on the corresponding gtk widget.
Until now, the default size was ignored for fixed size windows, so this
had no effect and remained unnoticed, but with the recent change for
client-side decorations, the default size is now used even for fixed size
windows, which can cause the resulting fixed size window to be much
smaller than expected with the size request.
For fixed size windows, if we have both a size request and a default
size set, prefer the size request as before.
https://bugzilla.gnome.org/show_bug.cgi?id=763749
commit c3dc0d80f1 fixed the behavior of
GtkContainer widgets requesting an IMMEDIATE resize-mode.
However, GtkWindow has been stomping on resize-mode during realize()
since commit addcc64b9c. The combination
of factors that led to this not being a visible problem during all this
while is uncertain, but this now causes the Shell to continuously try to
relayout its ShellEmbeddedWindow (a GtkWindow subclass).
This commit separates the resize-mode as set internally by GtkWindow
from the one set with the external API, so that GtkWindow only changes
it when it had not been set before by the subclass.
https://bugzilla.gnome.org/show_bug.cgi?id=763650
This makes toplevels pseudo-transparent wrt this mimetype, so if
the drag source offers this mimetype and not another that was
managed by the destination-side widget hierarchy, the window will
be an acceptable target for this mimetype, allowing it to trigger
whatever is meant to in the source side.
https://bugzilla.gnome.org/show_bug.cgi?id=763387
Under Wayland, popovers use subsurfaces, and we end up getting
configure events for these delivered to the toplevel they're in.
To avoid triggering resize loops, ignore configure events that
are not for the toplevel window itself.
https://bugzilla.gnome.org/show_bug.cgi?id=763351
One important aspect of non-resizable windows that we need to preserve
is that they shrink when their content requires less size.
Previous changes to allow the default size to be applied to fixed size
windows would have prevented all fixed size windows from shrinking when
their content requires less size.
Allow shrinking for fixed-size windows unless a default size was
specified.
https://bugzilla.gnome.org/show_bug.cgi?id=762974
Previous commit to address the default size introduced a regression
with fixed size windows if no default size was given, the resulting
window would end up much smaller than its actual content.
If a window is not resizable (with gtk_window_set_resizable ()),
the size given with gtk_window_set_default_size() is ignored.
The solution to this would be to use gtk_widget_set_size_request() but
that's a GtkWidget API and therefore does not take into account the
client side decorations when in use with GtkWindow.
Refactor the code so that gtk_window_set_default_size() (which is a
GtkWindow API) gives the expected result on non-resizable windows as
well.
bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=762974
Will make GTK+ more willing to use CSD for all normal windows without
being asked to. Lack of desktop composition will, of course, prevent
it from using CSD (in theory).
GTK_CSD=0 will force CSD to NOT to be used whenever
possible (i.e. in cases where CSD is not specifically requested
by a window, by design).
https://bugzilla.gnome.org/show_bug.cgi?id=759899
We connect to the titlebar widgets change notification regardless
whether it is internally created or not, so don't make the signal
handler disconnection conditional on that either.
Presently, Gtk will only send a startup notification completion message
for the first window that is shown. This is not good for the case of
GtkApplication, where we are expected to participate in
startup-notification for all windows.
We have avoided this problem by manually emitting the startup complete
message from after_emit in GtkApplication.
Unfortunately, this causes problems for windows that are shown with a
delay. It is also a dirty hack.
The reason for the original behaviour is simple: there is a static
boolean in gtkwindow.c which controls it. We remove this.
Instead, clear the startup notification ID stored in GDK when sending
the completion message. GtkApplication will re-set this the next time
an event comes in which needs startup-notification handling. In the
non-GtkApplication case, newly shown windows will still not send the
message, since the cookie will have been cleared.
Finally, we remove the hack from GtkApplication's after_emit.
This will probably cause some regressions in terms of lingering startup
notification messages. The correct solution here is to always use
gtk_window_present(), including when merely opening a new document (with
a new tab, for example).
https://bugzilla.gnome.org/show_bug.cgi?id=690791
Quite a few applications use GTK_WINDOW_POPUP to create various
temporary windows and place then on screen. That works fine on X11 but
on Wayland there is no global coordinate system for regular surfaces.
If the application is using a gdk temp window and set a parent with
gtk_window_transient_for(), the gdk wayland backend has all it needs to
create a subsurface that can be placed at will by the application.
Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=759738
67ab00e01e removed the fake configure code in gtk_window_show() and
replaced it with a simple gtk_widget_realize(). The initial allocation
code in realize() only allocates the natural size or the last requested
size which now no longer is set, resulting in a too small first allocation.
This builds a configure request to compute the allocation size instead
which includes default size, CSD etc..
This problem could be seen in case of a GtkPaned in a GtkWindow with a
default size set and the pane position set as well. The first allocation
would be the natural size of the GtkPaned which would clamp the pane
position if too larg. Only the second allocation would fill the parent
window using the now wrong pane position.
https://bugzilla.gnome.org/show_bug.cgi?id=759705
When clicking "Cancel" on the "Do you want to use GTK+ Inspector?"
dialog, unregister the update_debugging idle handler. Also, steal
reference to 'inspector_window' while gtk_destroy_widget(), to make
further gtk_window_update_debugging() calls as a no-op.
https://bugzilla.gnome.org/show_bug.cgi?id=759764
Instead of having old and new style, now have a GtkCssStyleChange opaque
object that will compute the changes you are interested in for you.
This simplifies change signal handlers quite a bit and avoids lots of
repeated computation in every signal handler.
Since we're no longer doing geometry widgets, don't send
base size and increments to the window manager anymore either.
This avoids an ugly 2 pixel gap to the right and bottom of half-tiled
terminals under gnome-shell.
Applying the client-side decorations in the configure routine greatly
increases the chances of having the right size for the GtkHEaderBar and
border shadows.
Yet, it may be possible that these sizes change at a later point in
time, if for example the GtkHeaderBar grows in height while adding new
controls.
Mention this possible pitfall in the documentation for
gtk_window_resize().
https://bugzilla.gnome.org/show_bug.cgi?id=756618
Just like we did for the default size, that reduces the chances of
having the headerbar missing or wrongly sized when computing the client
side decorations controls.
https://bugzilla.gnome.org/show_bug.cgi?id=756618
It seems this branch is not needed anymore. It was originally added in
1999 to support gtk_widget_realize(), but all those reasons seem
obsolete today.
Instead just call gtk_widget_realize().
If you end up at this commit when bisecting:
There is no bug that made me remove this code, it was purely meant to be
cleanup / dead code removal. I seem to have introduced a new bug or
bisecting wouldn't have let you here. So it seems we should just revert
this commit.
Widgets such as gtkfilechooser may be saving their size and position on
the unmap callback, if the client-side decoration header bar is removed
first, the reported size will be wrong.
https://bugzilla.gnome.org/show_bug.cgi?id=756618
Fix a regression introduced by:
commit 6866d1c widget: Make gtk_widget_queue_allocate() not resize
Where the dropdown menu in Firefox would not be relocated after the
toplevel window is moved.
bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=758609
Just like it happens for window dragging, we're likely to not see the
matching button release for this event, so we must reset the controller
manually here.
https://bugzilla.gnome.org/show_bug.cgi?id=758661
Before calling gdk_window_move_resize(), store the full configure
request, not just width and height.
Fixes firefox randomly losing position of its dropdown windows.
https://bugzilla.gnome.org/show_bug.cgi?id=758609
Before the resulting window size would differ if the default size was set
before adding a headerbar vs after. Now the saved state is again the actual
requested size and it is adjusted at the time we request a window size.
https://bugzilla.gnome.org/show_bug.cgi?id=756618
GtkHeaderBar will not show the maximize button if the window in not of
type normal or not resizeable.
Use the same restriction for double-click actions as well.
Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=757530
An application may use gtk_window_get_size() to retrieve the current
window size and later reuse that size with
gtk_window_set_default_size().
gtk_window_set_default_size() and gtk_window_get_default_size() should
also take client side decorations offset into account.
Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=756618
Getting the shadow width must not call gtk_style_context_set_state()
because that will invalidate the node and cause a style-updated emission
which can cause gtk_widget_queue_resize() calls.
And calling queue_resize() from get_preferred_size() essentially means
the size is permanently invalid because you invalidate it while
querying it.
This causes flickering of windows when going from/to backdrop state. To
avoid this we either need to fix the theme to not have different shadow
sizes in those cases or we need to ensure the window doesn't flicker in
the first place.
At the time gtk_window_move() or gtk_window_resize() get called, there
is no way to predict if a popup window will actually draw its shadow, so
applying an offset in this case may end up with a wrong size or
positioning for such windows.
Changing the logic in gtk_window_should_use_csd() as previously done to
address that issue will cause some other breakage as popup windows may
not draw a shadow but still need CSD.
So best is to actually apply client side decorations offset for regular,
top level windows only. This is actually a lot simpler and safer and
less likely to cause additional breakage.
Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=756618
git commit a5b1cdd0 introduced a regression where CSD windows are not
resizable with metacity.
Reason being that metacity does not support "_GTK_FRAME_EXTENTS" and
therefore gtk_window_supports_client_shadow() would always return FALSE.
This explains why it works with window managers which support
"_GTK_FRAME_EXTENTS" such as mutter/gnome-shell or xfwm4.
Partially revert commit a5b1cdd0 to reinstate the logic in
get_shadow_width().
Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=757805
The list of popovers will specify the stacking order, a
_gtk_window_raise_popover() private call has been added so popover
widgets can request being on top.
Also, the stacking on popovers is ensured on gtk_window_size_allocate(),
after the size/stacking changes on the child widget have finished, this
will ensure popovers are kept on top of window contents.
https://bugzilla.gnome.org/show_bug.cgi?id=756670
Previous commit 305b34a "GtkWindow: fix move/get position with CSD"
introduced a regression because some windows presumably use shadows but
actually don't, resulting in a negative offset being wrongly applied.
Problem is that get_shadow_width() would return non-zero shadows even
for windows that have no shadow, thus causing the negative offset.
Fix the logic in get_shadow_width() and gtk_window_should_use_csd() so
that get_shadow_width() returns accurate values.
Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=756618
This commit toggles the big switch. We now don't run size_allocate()
from the toplevel up anymore in cases where we don't need to.
Things might be broken in subtle ways as a result of this commit. We'll
have to find them and fix them.
Widgets that already have a resize queued don't need to walk the whole
parent chain and queue another resize. It's enough to do it once per
resize.
This also means that sizegroups cannot use the shortcut of just
invalidating the first widget in the group anymore. That widget might
already have a resize queued while others don't.
Ignore the geometry widget passed to gtk_window_set_geometry_hints().
Usind the widget itself was a hack that complicates the size request
machinery.
It is also incorrect in that it doesn't respect height-for-width.
Last but not least, it was only used by gnome-terminal and that
application can easily work without it.
Take into account and compensate for the size of the client side
decorations widgets in gtk_window_move() and gtk_window_get_pos()
including gravity.
Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=756618
When client side decoration is used, the size passed to
gtk_window_resize() or retrieved from gtk_window_get_size() for top-
level windows also accounts for the client side decorations widgets
such as the title bar or the shadow borders.
Add up the size of these additional controls to the given size to get
the size expected.
Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=756618
If a window is decorated, we need to draw the frame and shadow, even if
it is app-paintable - it's just nonsense to have a frame that we handle
events on, but expect the app to paint it. (We paint the titlebar in
any case.) If a client wants to handle all painting, it should use an
undecorated window.
https://bugzilla.gnome.org/show_bug.cgi?id=756886
Make it what it is - the enum - so that that it is sure that the hint
will fit in the field. Without this, any hint that doesn't fit in 3
bits will be truncated to the 3 least significant bits, causing
unexpected behaviour.
https://bugzilla.gnome.org/show_bug.cgi?id=756496
Once a window is maximized/fullscreen, resize increments should be
ignored otherwise the window may appear smaller than the screen size.
That also applies to configure requests as well.
https://bugzilla.gnome.org/show_bug.cgi?id=751368
Check whether the given popover even changed size in
_gtk_window_set_popover_position. If not, just move its GdkWindow
without calling gtk_widget_queue_resize. Using popover_get_rect here is
still relatively costly, but popover_size_allocate would be doing that
anyway.
https://bugzilla.gnome.org/show_bug.cgi?id=755435
To GtkGesture machinery, if an event triggers a controller/gesture signal,
and gesture reset/cancellation as a result, the event has been managed
after all.
Commit e3bd895667 effectively changed the return value of the
wrapping gtk_event_controller_handle_event() function, which broke some
paths (eg. gtk_popover_button_press() wouldn't while the GTK+ grab was
active for this reason because the button press event was consumed early
on gtk_window_check_handle_wm_event()).
That patch is not too off-track given potential child widgets' behavior,
we want nonetheless to distinguish the denied vs cancelled paths here
(because GtkWindow itself relies on the GtkGesture behavior described in
the first paragraph on the begin_move/resize paths), so just reset
gestures after the event has already gone through the GtkEventController
so the return value is unaffected.
Traditionally a sequence is set to GTK_EVENT_SEQUENCE_DENIED state when
it is to be ignored, which means it is dormant, but still managed by the
gesture (accounting, "denied" sequences still make "slots" in multitouch
gesture busy, etc...).
This gesture will run for all button presses and releases in the window
though when presses happen on the "window content" region, and we can't
account for every children to be as educated as setting the proper mask
on every window, or ensuring events will be propagated as they should.
In order to cater for this, just reset the gestures, we can live without
such accounting in these specific GtkGestureSingle gestures.
https://bugzilla.gnome.org/show_bug.cgi?id=754098
This reverts commit 3eacfa88f2.
Apart from the patch not being correct, we don't want to expose private
structures in header files if we can avoid it.
And this type-checking overhead is not an optimization that is even
measurable.
https://bugzilla.gnome.org/show_bug.cgi?id=754932
Instead of queueing a new idle handler every time we call
gtk_window_update_debugging(), only queue one if none is queued that.
Saves a lot of work, in particular when templates create context menus
for every row in a large listbox as in the gtk-demo listbox example.
This ensures that windows appear in the inspectors tree when
they are created, and it prevents GTK_DEBUG=interactive from
coming up with an empty object tree.
https://bugzilla.gnome.org/show_bug.cgi?id=752664
The previous fix was falling into the crack between
realized and mapped - we would apply the state when a window
is just realized, then unset the _initially flag, and then
when the window gets mapped, we'd undo the state. To fix
this, go back to the way things were when these flags were
first introduced.
https://bugzilla.gnome.org/show_bug.cgi?id=752765
Go back to use these variables only for pre-mapped state changes.
Their use got muddied over the years, and it was hard to keep track
of what is acutal state, and what just a queued request.
1. This confuses the code as it's using the old type hint with the new
type hint on GDK window creation
2. It only existed as a workaround for old code that directly accessed
window->type_hint which hasn't been possible since 3.0.
This behavior has been made optional on add_popover() time, text handles
will keep being able to overflow the window, in order to allow text
selection on views too close to the window edge.
Regular GtkPopovers are reinstaurated to the previous size positioning
logic though, that is, limited by the visible area of the window.
Under Wayland, fullscreen/maximized windows may not cover the entire
area when a size increment is specified.
Ignore size increments for fullscreen/maximized windows just like most
window managers do under X11 so that windows with size increments can
still be fullscreen or fully maximized under Wayland as well.
https://bugzilla.gnome.org/show_bug.cgi?id=751368
Since 740bcf5, we use these properties to properly compute shadow widths
for unmapped windows. If a client calls gtk_window_maximize and a window
manager unmaximizes a window, we should draw borders, so we need to
reset these when we get the property notification.
This queues an unnecessary resize on the toplevel, and is not needed
anymore, now that GtkWidget does not call
gtk_style_context_set_background() on the window's GdkWindow anymore.
