clutter: Make ClutterGrab a GObject

We'll want to add notifications on it, make it a GObject
to allow that.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3420>

clutter/clutter/clutter-grab-private.h

@@ -0,0 +1,45 @@
+/*
+ * Clutter.
+ *
+ * Copyright (C) 2023 Red Hat Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author: Carlos Garnacho <carlosg@gnome.org>
+ */
+
+#pragma once
+
+#include "clutter-grab.h"
+#include "clutter-stage.h"
+
+G_BEGIN_DECLS
+
+struct _ClutterGrab
+{
+  GObject parent_instance;
+  ClutterStage *stage;
+
+  ClutterActor *actor;
+  gboolean owns_actor;
+
+  ClutterGrab *prev;
+  ClutterGrab *next;
+};
+
+ClutterGrab * clutter_grab_new (ClutterStage *stage,
+                                ClutterActor *actor,
+                                gboolean      owns_actor);
+
+G_END_DECLS

clutter/clutter/clutter-grab.c

@@ -0,0 +1,75 @@
+/*
+ * Clutter.
+ *
+ * Copyright (C) 2023 Red Hat Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author: Carlos Garnacho <carlosg@gnome.org>
+ */
+
+#include "config.h"
+
+#include "clutter-grab-private.h"
+
+G_DEFINE_FINAL_TYPE (ClutterGrab, clutter_grab, G_TYPE_OBJECT)
+
+static void
+clutter_grab_dispose (GObject *object)
+{
+  clutter_grab_dismiss (CLUTTER_GRAB (object));
+  G_OBJECT_CLASS (clutter_grab_parent_class)->dispose (object);
+}
+
+static void
+clutter_grab_finalize (GObject *object)
+{
+  ClutterGrab *grab = CLUTTER_GRAB (object);
+
+  if (grab->owns_actor)
+    g_clear_pointer (&grab->actor, clutter_actor_destroy);
+
+  G_OBJECT_CLASS (clutter_grab_parent_class)->finalize (object);
+}
+
+static void
+clutter_grab_class_init (ClutterGrabClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->dispose = clutter_grab_dispose;
+  object_class->finalize = clutter_grab_finalize;
+}
+
+static void
+clutter_grab_init (ClutterGrab *grab)
+{
+}
+
+ClutterGrab *
+clutter_grab_new (ClutterStage *stage,
+                  ClutterActor *actor,
+                  gboolean      owns_actor)
+{
+  ClutterGrab *grab;
+
+  grab = g_object_new (CLUTTER_TYPE_GRAB, NULL);
+  grab->stage = stage;
+
+  grab->actor = actor;
+  if (owns_actor)
+    grab->owns_actor = TRUE;
+
+  return grab;
+}

clutter/clutter/clutter-grab.h

@@ -29,20 +29,15 @@
 
 #include <glib-object.h>
 
-#define CLUTTER_TYPE_GRAB (clutter_grab_get_type ())
-typedef struct _ClutterGrab ClutterGrab;
+#include "clutter-macros.h"
+#include "clutter-enums.h"
 
+#define CLUTTER_TYPE_GRAB (clutter_grab_get_type ())
 CLUTTER_EXPORT
-GType clutter_grab_get_type (void) G_GNUC_CONST;
+G_DECLARE_FINAL_TYPE (ClutterGrab, clutter_grab, CLUTTER, GRAB, GObject)
 
 CLUTTER_EXPORT
 void clutter_grab_dismiss (ClutterGrab *grab);
 
 CLUTTER_EXPORT
 ClutterGrabState clutter_grab_get_seat_state (ClutterGrab *grab);
-
-CLUTTER_EXPORT
-ClutterGrab * clutter_grab_ref (ClutterGrab *grab);
-
-CLUTTER_EXPORT
-void clutter_grab_unref (ClutterGrab *grab);

clutter/clutter/clutter-stage.c

@@ -50,7 +50,7 @@
 #include "clutter/clutter-event-private.h"
 #include "clutter/clutter-frame-clock.h"
 #include "clutter/clutter-frame.h"
-#include "clutter/clutter-grab.h"
+#include "clutter/clutter-grab-private.h"
 #include "clutter/clutter-input-device-private.h"
 #include "clutter/clutter-input-only-actor.h"
 #include "clutter/clutter-main.h"
@@ -138,18 +138,6 @@ typedef struct _ClutterStagePrivate
   guint actor_needs_immediate_relayout : 1;
 } ClutterStagePrivate;
 
-struct _ClutterGrab
-{
-  grefcount ref_count;
-  ClutterStage *stage;
-
-  ClutterActor *actor;
-  gboolean owns_actor;
-
-  ClutterGrab *prev;
-  ClutterGrab *next;
-};
-
 enum
 {
   PROP_0,
@@ -3882,44 +3870,6 @@ clutter_stage_notify_grab (ClutterStage *stage,
   clutter_stage_notify_grab_on_key_focus (stage, cur_actor, old_actor);
 }
 
-ClutterGrab *
-clutter_grab_ref (ClutterGrab *grab)
-{
-  g_ref_count_inc (&grab->ref_count);
-  return grab;
-}
-
-void
-clutter_grab_unref (ClutterGrab *grab)
-{
-  if (g_ref_count_dec (&grab->ref_count))
-    {
-      clutter_grab_dismiss (grab);
-      g_free (grab);
-    }
-}
-
-G_DEFINE_BOXED_TYPE (ClutterGrab, clutter_grab,
-                     clutter_grab_ref, clutter_grab_unref)
-
-static ClutterGrab *
-clutter_grab_new (ClutterStage *stage,
-                  ClutterActor *actor,
-                  gboolean      owns_actor)
-{
-  ClutterGrab *grab;
-
-  grab = g_new0 (ClutterGrab, 1);
-  g_ref_count_init (&grab->ref_count);
-  grab->stage = stage;
-
-  grab->actor = actor;
-  if (owns_actor)
-    grab->owns_actor = TRUE;
-
-  return grab;
-}
-
 static ClutterGrab *
 clutter_stage_grab_full (ClutterStage *stage,
                          ClutterActor *actor,

clutter/clutter/meson.build

@@ -118,6 +118,7 @@ clutter_sources = [
   'clutter-frame-clock.c',
   'clutter-frame.c',
   'clutter-gesture-action.c',
+  'clutter-grab.c',
   'clutter-graphene.c',
   'clutter-grid-layout.c',
   'clutter-image.c',

src/compositor/meta-window-drag.c

@@ -178,7 +178,7 @@ meta_window_drag_finalize (GObject *object)
 
   hide_tile_preview (window_drag);
   g_clear_pointer (&window_drag->handler, clutter_actor_destroy);
-  g_clear_pointer (&window_drag->grab, clutter_grab_unref);
+  g_clear_object (&window_drag->grab);
   g_clear_object (&window_drag->effective_grab_window);
 
   G_OBJECT_CLASS (meta_window_drag_parent_class)->finalize (object);

src/tests/clutter/conform/grab.c

@@ -237,7 +237,7 @@ grab_under_pointer (void)
   event_log_compare ((EventLog *) &grab_log, data.events);
 
   clutter_grab_dismiss (grab);
-  clutter_grab_unref (grab);
+  g_clear_object (&grab);
   event_log_compare ((EventLog *) &ungrab_log, data.events);
 
   test_data_shutdown (&data);
@@ -264,7 +264,7 @@ grab_under_pointers_parent (void)
   event_log_compare ((EventLog *) &grab_log, data.events);
 
   clutter_grab_dismiss (grab);
-  clutter_grab_unref (grab);
+  g_clear_object (&grab);
   event_log_compare ((EventLog *) &ungrab_log, data.events);
 
   test_data_shutdown (&data);
@@ -295,7 +295,7 @@ grab_outside_pointer (void)
   event_log_compare ((EventLog *) &grab_log, data.events);
 
   clutter_grab_dismiss (grab);
-  clutter_grab_unref (grab);
+  g_clear_object (&grab);
   event_log_compare ((EventLog *) &ungrab_log, data.events);
 
   test_data_shutdown (&data);
@@ -320,7 +320,7 @@ grab_stage (void)
   event_log_compare ((EventLog *) &grab_log, data.events);
 
   clutter_grab_dismiss (grab);
-  clutter_grab_unref (grab);
+  g_clear_object (&grab);
   event_log_compare ((EventLog *) &ungrab_log, data.events);
 
   test_data_shutdown (&data);
@@ -364,11 +364,11 @@ grab_stack_1 (void)
 
   /* Dismiss orderly */
   clutter_grab_dismiss (grab2);
-  clutter_grab_unref (grab2);
+  g_clear_object (&grab2);
   event_log_compare ((EventLog *) &ungrab2_log, data.events);
 
   clutter_grab_dismiss (grab1);
-  clutter_grab_unref (grab1);
+  g_clear_object (&grab1);
   event_log_compare ((EventLog *) &ungrab1_log, data.events);
 
   test_data_shutdown (&data);
@@ -414,11 +414,11 @@ grab_stack_2 (void)
 
   /* Dismiss orderly */
   clutter_grab_dismiss (grab2);
-  clutter_grab_unref (grab2);
+  g_clear_object (&grab2);
   event_log_compare ((EventLog *) &ungrab2_log, data.events);
 
   clutter_grab_dismiss (grab1);
-  clutter_grab_unref (grab1);
+  g_clear_object (&grab1);
   event_log_compare ((EventLog *) &ungrab1_log, data.events);
 
   test_data_shutdown (&data);
@@ -462,11 +462,11 @@ grab_unordered_ungrab_1 (void)
 
   /* Dismiss disorderly */
   clutter_grab_dismiss (grab1);
-  clutter_grab_unref (grab1);
+  g_clear_object (&grab1);
   event_log_compare ((EventLog *) &ungrab1_log, data.events);
 
   clutter_grab_dismiss (grab2);
-  clutter_grab_unref (grab2);
+  g_clear_object (&grab2);
   event_log_compare ((EventLog *) &ungrab2_log, data.events);
 
   test_data_shutdown (&data);
@@ -508,11 +508,11 @@ grab_unordered_ungrab_2 (void)
 
   /* Dismiss disorderly */
   clutter_grab_dismiss (grab1);
-  clutter_grab_unref (grab1);
+  g_clear_object (&grab1);
   event_log_compare ((EventLog *) &ungrab1_log, data.events);
 
   clutter_grab_dismiss (grab2);
-  clutter_grab_unref (grab2);
+  g_clear_object (&grab2);
   event_log_compare ((EventLog *) &ungrab2_log, data.events);
 
   test_data_shutdown (&data);
@@ -533,7 +533,7 @@ grab_key_focus_in_grab (void)
   g_assert_true (clutter_actor_has_key_focus (data.b));
 
   clutter_grab_dismiss (grab);
-  clutter_grab_unref (grab);
+  g_clear_object (&grab);
   g_assert_true (clutter_actor_has_key_focus (data.b));
 
   test_data_shutdown (&data);
@@ -554,7 +554,7 @@ grab_key_focus_outside_grab (void)
   g_assert_false (clutter_actor_has_key_focus (data.b));
 
   clutter_grab_dismiss (grab);
-  clutter_grab_unref (grab);
+  g_clear_object (&grab);
   g_assert_true (clutter_actor_has_key_focus (data.b));
 
   test_data_shutdown (&data);
@@ -643,7 +643,7 @@ grab_input_only (void)
     g_main_context_iteration (NULL, TRUE);
   event_log_compare ((EventLog *) &grab2_log, data.events);
 
-  clutter_grab_unref (grab);
+  g_clear_object (&grab);
   event_log_compare ((EventLog *) &grab3_log, data.events);
 
   clutter_virtual_input_device_notify_button (pointer,