[mutter] wayland/xdg-output: Fix xdg-output v3 support

[Jonas Ådahl <jadahl src gnome org>]

commit be4131b3c487e6bc1d89286207f8a52a4fb62ec8
Author: Olivier Fourdan <ofourdan redhat com>
Date:   Tue Sep 3 13:46:37 2019 +0200

    wayland/xdg-output: Fix xdg-output v3 support
    
    When using xdg-output v3 or later, the Wayland compositor does not send
    xdg_output.done events which are deprecated.
    
    Instead, it should send a wl_output.done event for the matching
    wl_output.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/771

 src/wayland/meta-wayland-outputs.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)
---
diff --git a/src/wayland/meta-wayland-outputs.c b/src/wayland/meta-wayland-outputs.c
index fdbf01688..f4709caef 100644
--- a/src/wayland/meta-wayland-outputs.c
+++ b/src/wayland/meta-wayland-outputs.c
@@ -624,12 +624,6 @@ send_xdg_output_events (struct wl_resource *resource,
       zxdg_output_v1_send_description (resource, description);
     }
 
-  if (need_all_events && version < NO_XDG_OUTPUT_DONE_SINCE_VERSION)
-    {
-      zxdg_output_v1_send_done (resource);
-      need_done = FALSE;
-    }
-
   if (pending_done_event && need_done)
     *pending_done_event = TRUE;
 }
@@ -642,6 +636,8 @@ meta_xdg_output_manager_get_xdg_output (struct wl_client   *client,
 {
   struct wl_resource *xdg_output_resource;
   MetaWaylandOutput *wayland_output;
+  int xdg_output_version;
+  int wl_output_version;
 
   xdg_output_resource = wl_resource_create (client,
                                             &zxdg_output_v1_interface,
@@ -666,6 +662,14 @@ meta_xdg_output_manager_get_xdg_output (struct wl_client   *client,
                           wayland_output,
                           wayland_output->logical_monitor,
                           TRUE, NULL);
+
+  xdg_output_version = wl_resource_get_version (xdg_output_resource);
+  wl_output_version = wl_resource_get_version (output);
+
+  if (xdg_output_version < NO_XDG_OUTPUT_DONE_SINCE_VERSION)
+    zxdg_output_v1_send_done (xdg_output_resource);
+  else if (wl_output_version >= WL_OUTPUT_DONE_SINCE_VERSION)
+    wl_output_send_done (output);
 }
 
 static void