[mutter] xwayland: Don't fetch global when shutting down DND

[Marge Bot <marge-bot src gnome org>]

commit 5bc8823701ebd2766a4bd77302aa48ff2e0d9899
Author: Jonas Ådahl <jadahl gmail com>
Date:   Tue Apr 20 18:41:07 2021 +0200

    xwayland: Don't fetch global when shutting down DND
    
    It might not be there when shutting down, so get it from a more managed
    place. Note that this isn't strictly needed right now, but eventually,
    the MetaWaylandCompositor pointer will be cleared using a g_clear*()
    helper, which clears the pointer before freeing the instance, which
    wouldn't work here.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1863>

 src/wayland/meta-xwayland-dnd.c     | 5 ++---
 src/wayland/meta-xwayland-private.h | 3 ++-
 src/wayland/meta-xwayland.c         | 9 +++++----
 3 files changed, 9 insertions(+), 8 deletions(-)
---
diff --git a/src/wayland/meta-xwayland-dnd.c b/src/wayland/meta-xwayland-dnd.c
index de61ccf73f..a3148ed950 100644
--- a/src/wayland/meta-xwayland-dnd.c
+++ b/src/wayland/meta-xwayland-dnd.c
@@ -976,10 +976,9 @@ meta_xwayland_init_dnd (Display *xdisplay)
 }
 
 void
-meta_xwayland_shutdown_dnd (Display *xdisplay)
+meta_xwayland_shutdown_dnd (MetaXWaylandManager *manager,
+                            Display             *xdisplay)
 {
-  MetaWaylandCompositor *compositor = meta_wayland_compositor_get_default ();
-  MetaXWaylandManager *manager = &compositor->xwayland_manager;
   MetaXWaylandDnd *dnd = manager->dnd;
 
   g_assert (dnd != NULL);
diff --git a/src/wayland/meta-xwayland-private.h b/src/wayland/meta-xwayland-private.h
index bba0934bdf..2e38f380db 100644
--- a/src/wayland/meta-xwayland-private.h
+++ b/src/wayland/meta-xwayland-private.h
@@ -41,7 +41,8 @@ meta_xwayland_handle_xevent (XEvent *event);
 
 /* wl_data_device/X11 selection interoperation */
 void     meta_xwayland_init_dnd         (Display *xdisplay);
-void     meta_xwayland_shutdown_dnd     (Display *xdisplay);
+void meta_xwayland_shutdown_dnd (MetaXWaylandManager *manager,
+                                 Display             *xdisplay);
 gboolean meta_xwayland_dnd_handle_event (XEvent *xevent);
 
 const MetaWaylandDragDestFuncs * meta_xwayland_selection_get_drag_dest_funcs (void);
diff --git a/src/wayland/meta-xwayland.c b/src/wayland/meta-xwayland.c
index 325e99a927..9926f63d44 100644
--- a/src/wayland/meta-xwayland.c
+++ b/src/wayland/meta-xwayland.c
@@ -1208,17 +1208,18 @@ monitors_changed_cb (MetaMonitorManager *monitor_manager)
 }
 
 static void
-on_x11_display_closing (MetaDisplay *display)
+on_x11_display_closing (MetaDisplay         *display,
+                        MetaXWaylandManager *manager)
 {
   Display *xdisplay = meta_x11_display_get_xdisplay (display->x11_display);
 
-  meta_xwayland_shutdown_dnd (xdisplay);
+  meta_xwayland_shutdown_dnd (manager, xdisplay);
   g_signal_handlers_disconnect_by_func (meta_monitor_manager_get (),
                                         monitors_changed_cb,
                                         NULL);
   g_signal_handlers_disconnect_by_func (display,
                                         on_x11_display_closing,
-                                        NULL);
+                                        manager);
 }
 
 static void
@@ -1262,7 +1263,7 @@ meta_xwayland_complete_init (MetaDisplay *display,
 #endif
 
   g_signal_connect (display, "x11-display-closing",
-                    G_CALLBACK (on_x11_display_closing), NULL);
+                    G_CALLBACK (on_x11_display_closing), manager);
   meta_xwayland_init_dnd (xdisplay);
   add_local_user_to_xhost (xdisplay);
   meta_xwayland_init_xrandr (manager, xdisplay);