[mutter/wip/carlosg/pointer-lock-checks: 70/72] wayland: Warn if a surface is being set while the pointer is invisible

[Carlos Garnacho <carlosg src gnome org>]

commit 9f617ae43dd0511b16387082b0ef7e59543280ac
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Sep 12 19:17:06 2019 +0200

    wayland: Warn if a surface is being set while the pointer is invisible
    
    This is an unexpected condition, better not to fall in it without further
    indications.
    
    Closes: https://gitlab.gnome.org/GNOME/mutter/issues/779

 src/wayland/meta-wayland-pointer.c | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/src/wayland/meta-wayland-pointer.c b/src/wayland/meta-wayland-pointer.c
index 334349e30..e8f0be4c6 100644
--- a/src/wayland/meta-wayland-pointer.c
+++ b/src/wayland/meta-wayland-pointer.c
@@ -887,6 +887,11 @@ meta_wayland_pointer_set_focus (MetaWaylandPointer *pointer,
                                 MetaWaylandSurface *surface)
 {
   MetaWaylandInputDevice *input_device = META_WAYLAND_INPUT_DEVICE (pointer);
+  MetaBackend *backend = meta_get_backend ();
+  MetaCursorTracker *cursor_tracker = meta_backend_get_cursor_tracker (backend);
+
+  g_return_if_fail (meta_cursor_tracker_get_pointer_visible (cursor_tracker) ||
+                   surface == NULL);
 
   if (pointer->focus_surface == surface)
     return;