[mutter/wip/ssd-black-borders-fix: 15/22] compositor: make set_frozen a vfunc

[Ray Strode <halfline src gnome org>]

commit 80562bbb102fa40a411d8a204567d036473aec57
Author: Ray Strode <rstrode redhat com>
Date:   Mon Mar 19 11:22:48 2018 -0400

    compositor: make set_frozen a vfunc
    
    MetaSurfaceActor can be made "frozen" via it's set_frozen method.
    
    That method could be useful as virtual function, so that the wayland
    subclass can tie into it and freeze the underlying surface.
    
    This commit does the prerequiste work of making set_frozen a vfunc.
    A future commit will change the wayland subclass code to leverage
    the vfunc.

 src/compositor/meta-surface-actor.c | 12 ++++++++++++
 src/compositor/meta-surface-actor.h |  3 +++
 2 files changed, 15 insertions(+)
---
diff --git a/src/compositor/meta-surface-actor.c b/src/compositor/meta-surface-actor.c
index bf8c76f39..64491ac8c 100644
--- a/src/compositor/meta-surface-actor.c
+++ b/src/compositor/meta-surface-actor.c
@@ -31,6 +31,9 @@ struct _MetaSurfaceActorPrivate
 
 static void cullable_iface_init (MetaCullableInterface *iface);
 
+void meta_surface_actor_real_set_frozen (MetaSurfaceActor *self,
+                                         gboolean          frozen);
+
 G_DEFINE_ABSTRACT_TYPE_WITH_CODE (MetaSurfaceActor, meta_surface_actor, CLUTTER_TYPE_ACTOR,
                                   G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init));
 
@@ -121,6 +124,8 @@ meta_surface_actor_class_init (MetaSurfaceActorClass *klass)
   object_class->dispose = meta_surface_actor_dispose;
   actor_class->pick = meta_surface_actor_pick;
 
+  klass->set_frozen = meta_surface_actor_real_set_frozen;
+
   signals[REPAINT_SCHEDULED] = g_signal_new ("repaint-scheduled",
                                              G_TYPE_FROM_CLASS (object_class),
                                              G_SIGNAL_RUN_LAST,
@@ -331,6 +336,13 @@ meta_surface_actor_is_visible (MetaSurfaceActor *self)
 void
 meta_surface_actor_set_frozen (MetaSurfaceActor *self,
                                gboolean          frozen)
+{
+  return META_SURFACE_ACTOR_GET_CLASS (self)->set_frozen (self, frozen);
+}
+
+void
+meta_surface_actor_real_set_frozen (MetaSurfaceActor *self,
+                                    gboolean          frozen)
 {
   MetaSurfaceActorPrivate *priv = self->priv;
 
diff --git a/src/compositor/meta-surface-actor.h b/src/compositor/meta-surface-actor.h
index 8c6dda253..f60cbb64f 100644
--- a/src/compositor/meta-surface-actor.h
+++ b/src/compositor/meta-surface-actor.h
@@ -36,6 +36,9 @@ struct _MetaSurfaceActorClass
                                   gboolean          unredirected);
   gboolean (* is_unredirected)   (MetaSurfaceActor *actor);
 
+  void     (* set_frozen)        (MetaSurfaceActor *actor,
+                                  gboolean          is_frozen);
+
   MetaWindow *(* get_window)      (MetaSurfaceActor *actor);
 };