[mutter] wayland: Update input device before repick

[Carlos Garnacho <carlosg src gnome org>]

commit a382698acc836287b25620a5155cf52579a043b4
Author: Olivier Fourdan <ofourdan redhat com>
Date:   Wed Jan 29 14:58:02 2020 +0100

    wayland: Update input device before repick
    
    When a Wayland window is mapped or unmapped, the Wayland compositor is
    expected to send the coorespoindign `wl_pointer` enter/leave events to
    the affected clients.
    
    To do so, mutter calls `meta_wayland_compositor_repick()` which
    eventually calls `meta_wayland_pointer_repick()` and
    `repick_for_event()`.
    
    If pointer input device has not been updated yet, the old clutter actor
    is picked and no enter/leave event is emitted.
    
    Make sure we update the pointer input device prior to do the repick to
    get the actual `ClutterActor` under the pointer.
    
    Closes: https://gitlab.gnome.org/GNOME/mutter/issues/1016
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/1026

 src/wayland/meta-wayland-pointer.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/wayland/meta-wayland-pointer.c b/src/wayland/meta-wayland-pointer.c
index 325467f27..ee69e13dc 100644
--- a/src/wayland/meta-wayland-pointer.c
+++ b/src/wayland/meta-wayland-pointer.c
@@ -1028,6 +1028,7 @@ meta_wayland_pointer_start_popup_grab (MetaWaylandPointer      *pointer,
 void
 meta_wayland_pointer_repick (MetaWaylandPointer *pointer)
 {
+  clutter_input_device_update (pointer->device, NULL, FALSE);
   repick_for_event (pointer, NULL);
 }