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wayland: Handle subsurface as popup parent

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When a subsurface is used as a parent of a popup, GDK needs to traverse
up to the transient-for as the next parent, to properly find the parent
used by the popup positioner. This is because the parent of a popup
must always either be an xdg_popup or an xdg_surface, but traversing
the "parent" (in GDK terms) upwards from a subsurface will end up on
the fake root window before we hit the actual parent (in Wayland terms).

https://bugzilla.gnome.org/show_bug.cgi?id=776225
This commit is contained in:
Jonas Ådahl 2017-01-05 16:01:49 +08:00
parent bea4c0898d
commit 5bae71f896
1 changed files with 16 additions and 4 deletions
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20
gdk/wayland/gdkwindow-wayland.c
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@ -1656,13 +1656,25 @@ get_real_parent_and_translate (GdkWindow *window,
GdkWindowImplWayland *impl = GDK_WINDOW_IMPL_WAYLAND (window->impl);
GdkWindow *parent = impl->transient_for;
while (parent &&
!gdk_window_has_native (parent) &&
gdk_window_get_effective_parent (parent))
while (parent)
{
GdkWindowImplWayland *parent_impl =
GDK_WINDOW_IMPL_WAYLAND (parent->impl);
GdkWindow *effective_parent = gdk_window_get_effective_parent (parent);
if ((gdk_window_has_native (parent) &&
!parent_impl->display_server.wl_subsurface) ||
!effective_parent)
break;
*x += parent->x;
*y += parent->y;
parent = gdk_window_get_effective_parent (parent);
if (gdk_window_has_native (parent) &&
parent_impl->display_server.wl_subsurface)
parent = parent->transient_for;
else
parent = effective_parent;
}
return parent;