[mutter/wip/chergert/has-accessible: 1/3] clutter: avoid g_signal_emit_by_name() from ClutterActor

[Christian Hergert <chergert src gnome org>]

commit 3db07e2017fe7e17708e3988ffa8ad9f2248dd36
Author: Christian Hergert <chergert redhat com>
Date:   Sun Feb 23 12:30:56 2020 -0800

    clutter: avoid g_signal_emit_by_name() from ClutterActor
    
    g_signal_emit_by_name() is used to emit signals on ClutterContainer when
    actors are removed or added. It happens to do various interface lookups
    which are a bit unneccessary and can allocate memory.
    
    Simply using emission wrappers makes all of that go away.
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1083

 clutter/clutter/clutter-actor.c     |  4 ++--
 clutter/clutter/clutter-container.c | 20 ++++++++++++++++++++
 clutter/clutter/clutter-container.h |  6 ++++++
 3 files changed, 28 insertions(+), 2 deletions(-)
---
diff --git a/clutter/clutter/clutter-actor.c b/clutter/clutter/clutter-actor.c
index 4979c9dcd..6624ae406 100644
--- a/clutter/clutter/clutter-actor.c
+++ b/clutter/clutter/clutter-actor.c
@@ -4582,7 +4582,7 @@ clutter_actor_remove_child_internal (ClutterActor                 *self,
 
   /* we need to emit the signal before dropping the reference */
   if (emit_actor_removed)
-    g_signal_emit_by_name (self, "actor-removed", child);
+    clutter_container_emit_actor_removed (CLUTTER_CONTAINER (self), child);
 
   if (notify_first_last)
     {
@@ -13226,7 +13226,7 @@ clutter_actor_add_child_internal (ClutterActor              *self,
     }
 
   if (emit_actor_added)
-    g_signal_emit_by_name (self, "actor-added", child);
+    clutter_container_emit_actor_added (CLUTTER_CONTAINER (self), child);
 
   if (notify_first_last)
     {
diff --git a/clutter/clutter/clutter-container.c b/clutter/clutter/clutter-container.c
index 587d891a7..4128482e3 100644
--- a/clutter/clutter/clutter-container.c
+++ b/clutter/clutter/clutter-container.c
@@ -1250,3 +1250,23 @@ clutter_container_child_notify (ClutterContainer *container,
                                                          child,
                                                          pspec);
 }
+
+void
+clutter_container_emit_actor_added (ClutterContainer *container,
+                                    ClutterActor     *actor)
+{
+  g_return_if_fail (CLUTTER_IS_CONTAINER (container));
+  g_return_if_fail (CLUTTER_IS_ACTOR (actor));
+
+  g_signal_emit (container, container_signals[ACTOR_ADDED], 0, actor);
+}
+
+void
+clutter_container_emit_actor_removed (ClutterContainer *container,
+                                      ClutterActor     *actor)
+{
+  g_return_if_fail (CLUTTER_IS_CONTAINER (container));
+  g_return_if_fail (CLUTTER_IS_ACTOR (actor));
+
+  g_signal_emit (container, container_signals[ACTOR_REMOVED], 0, actor);
+}
diff --git a/clutter/clutter/clutter-container.h b/clutter/clutter/clutter-container.h
index 26b991c9c..178f751fe 100644
--- a/clutter/clutter/clutter-container.h
+++ b/clutter/clutter/clutter-container.h
@@ -175,6 +175,12 @@ CLUTTER_EXPORT
 void                    clutter_container_child_notify                  (ClutterContainer *container,
                                                                          ClutterActor     *child,
                                                                          GParamSpec       *pspec);
+CLUTTER_EXPORT
+void                    clutter_container_emit_actor_added              (ClutterContainer *container,
+                                                                         ClutterActor     *actor);
+CLUTTER_EXPORT
+void                    clutter_container_emit_actor_removed            (ClutterContainer *container,
+                                                                         ClutterActor     *actor);
 
 G_END_DECLS