[mutter] udev: Fetch seat-id via backend instead of laucher

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

commit 8de3190627fa0fbbc59d4560fdadbbdc2f042f8a
Author: Jonas Ådahl <jadahl gmail com>
Date:   Mon Jan 18 22:38:21 2021 +0100

    udev: Fetch seat-id via backend instead of laucher
    
    Configurations where we won't have a MetaLauncher will be added, so
    avoid using its API directly.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1689>

 src/backends/native/meta-backend-native.c | 6 ++++++
 src/backends/native/meta-backend-native.h | 2 ++
 src/backends/native/meta-udev.c           | 4 +---
 3 files changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/src/backends/native/meta-backend-native.c b/src/backends/native/meta-backend-native.c
index cd9275ca08..bf270c3ffa 100644
--- a/src/backends/native/meta-backend-native.c
+++ b/src/backends/native/meta-backend-native.c
@@ -314,6 +314,12 @@ meta_backend_native_lock_layout_group (MetaBackend *backend,
   meta_backend_notify_keymap_layout_group_changed (backend, idx);
 }
 
+const char *
+meta_backend_native_get_seat_id (MetaBackendNative *backend_native)
+{
+  return meta_launcher_get_seat_id (backend_native->launcher);
+}
+
 static void
 meta_backend_native_set_pointer_constraint (MetaBackend           *backend,
                                             MetaPointerConstraint *constraint)
diff --git a/src/backends/native/meta-backend-native.h b/src/backends/native/meta-backend-native.h
index b389652b2d..b0d82d0161 100644
--- a/src/backends/native/meta-backend-native.h
+++ b/src/backends/native/meta-backend-native.h
@@ -47,4 +47,6 @@ MetaUdev * meta_backend_native_get_udev (MetaBackendNative *native);
 
 MetaKms * meta_backend_native_get_kms (MetaBackendNative *native);
 
+const char * meta_backend_native_get_seat_id (MetaBackendNative *backend_native);
+
 #endif /* META_BACKEND_NATIVE_H */
diff --git a/src/backends/native/meta-udev.c b/src/backends/native/meta-udev.c
index 9568698595..649c9df27e 100644
--- a/src/backends/native/meta-udev.c
+++ b/src/backends/native/meta-udev.c
@@ -111,8 +111,6 @@ gboolean
 meta_udev_is_drm_device (MetaUdev    *udev,
                          GUdevDevice *device)
 {
-  MetaLauncher *launcher =
-    meta_backend_native_get_launcher (udev->backend_native);
   const char *seat_id;
   const char *device_type;
   const char *device_seat;
@@ -133,7 +131,7 @@ meta_udev_is_drm_device (MetaUdev    *udev,
     }
 
   /* Skip devices that do not belong to our seat. */
-  seat_id = meta_launcher_get_seat_id (launcher);
+  seat_id = meta_backend_native_get_seat_id (udev->backend_native);
   if (g_strcmp0 (seat_id, device_seat))
     return FALSE;