Application is not expecting that.
Bug found due gdk_seat_grab() failure on Lock Screen. When user
Unlock the screen, the application is visible but does not receive
enter-event any more on X11/GNOME.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1485968
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1571422
Signed-off-by: Victor Toso <victortoso@redhat.com>
Signed-off-by: Carlos Garnacho <mrgarnacho@gmail.com>
gdk_seat_default_grab() grabs POINTER_EVENTS if the capability is
GDK_SEAT_CAPABILITY_ALL_POINTING. But that enumerator is a union that
includes GDK_SEAT_CAPABILITY_TOUCH, but we never grabbed TOUCH_EVENTS,
an unused macro that was presumably created with this purpose in mind.
So, check which of the ALL_POINTING capabilities we have, and set the
right mask of POINTER_EVENTS and/or TOUCH_EVENTS as required.
As part of this, explicitly let TABLET_STYLUS take over pointer events,
as this is the intended behaviour and was the effective result before.
This should fix touch events being lost in migrating from Device.grab()
to Seat.grab(GDK_SEAT_CAPABILITY_ALL_POINTING), as found by Inkscape.
https://bugzilla.gnome.org/show_bug.cgi?id=781757
