clutter: Add handle_event vfunc to ClutterAction

This will be the entry point for events into these actions.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2024>

clutter/clutter/clutter-action-private.h

@@ -36,6 +36,9 @@ G_BEGIN_DECLS
 void clutter_action_set_phase (ClutterAction     *action,
                                ClutterEventPhase  phase);
 
+gboolean clutter_action_handle_event (ClutterAction      *action,
+                                      const ClutterEvent *event);
+
 G_END_DECLS
 
 #endif /* CLUTTER_ACTION_PRIVATE_H */

clutter/clutter/clutter-action.c

@@ -58,9 +58,17 @@ struct _ClutterActionPrivate
 G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (ClutterAction, clutter_action,
                                      CLUTTER_TYPE_ACTOR_META)
 
+static gboolean
+clutter_action_handle_event_default (ClutterAction      *action,
+                                     const ClutterEvent *event)
+{
+  return FALSE;
+}
+
 static void
 clutter_action_class_init (ClutterActionClass *klass)
 {
+  klass->handle_event = clutter_action_handle_event_default;
 }
 
 static void
@@ -89,3 +97,10 @@ clutter_action_get_phase (ClutterAction *action)
 
   return priv->phase;
 }
+
+gboolean
+clutter_action_handle_event (ClutterAction      *action,
+                             const ClutterEvent *event)
+{
+  return CLUTTER_ACTION_GET_CLASS (action)->handle_event (action, event);
+}

clutter/clutter/clutter-action.h

@@ -51,6 +51,9 @@ struct _ClutterActionClass
   /*< private >*/
   ClutterActorMetaClass parent_class;
 
+  gboolean (* handle_event) (ClutterAction      *action,
+                             const ClutterEvent *event);
+
   void (* _clutter_action1) (void);
   void (* _clutter_action2) (void);
   void (* _clutter_action3) (void);

clutter/clutter/clutter-actor.c

@@ -12230,6 +12230,38 @@ clutter_actor_set_child_at_index (ClutterActor *self,
  * Event handling
  */
 
+static gboolean
+clutter_actor_run_actions (ClutterActor       *self,
+                           const ClutterEvent *event,
+                           ClutterEventPhase   phase)
+{
+  ClutterActorPrivate *priv;
+  const GList *actions, *l;
+  gboolean retval = CLUTTER_EVENT_PROPAGATE;
+
+  priv = self->priv;
+  if (!priv->actions)
+    return CLUTTER_EVENT_PROPAGATE;
+
+  actions = _clutter_meta_group_peek_metas (priv->actions);
+
+  for (l = actions; l; l = l->next)
+    {
+      ClutterAction *action = l->data;
+      ClutterEventPhase action_phase;
+
+      action_phase = clutter_action_get_phase (action);
+
+      if (action_phase == phase)
+        {
+          if (clutter_action_handle_event (action, event))
+            retval = CLUTTER_EVENT_STOP;
+        }
+    }
+
+  return retval;
+}
+
 /**
  * clutter_actor_event:
  * @actor: a #ClutterActor
@@ -12251,6 +12283,7 @@ clutter_actor_event (ClutterActor       *actor,
                      const ClutterEvent *event,
                      gboolean            capture)
 {
+  ClutterEventPhase phase;
   gboolean retval = FALSE;
   gint signal_num = -1;
   GQuark detail = 0;
@@ -12260,6 +12293,11 @@ clutter_actor_event (ClutterActor       *actor,
 
   g_object_ref (actor);
 
+  phase = capture ? CLUTTER_PHASE_CAPTURE : CLUTTER_PHASE_BUBBLE;
+  retval = clutter_actor_run_actions (actor, event, phase);
+  if (retval)
+    goto handled;
+
   switch (event->type)
     {
     case CLUTTER_NOTHING:
@@ -12342,6 +12380,7 @@ clutter_actor_event (ClutterActor       *actor,
         g_signal_emit (actor, actor_signals[signal_num], 0, event, &retval);
     }
 
+ handled:
   g_object_unref (actor);
 
   return retval;