Ref count layer animation controllers.

cc/animation_registrar.cc

+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "cc/animation_registrar.h"
+
+#include "cc/layer_animation_controller.h"
+
+namespace cc {
+
+AnimationRegistrar::AnimationRegistrar() { }
+AnimationRegistrar::~AnimationRegistrar() { }
+
+scoped_refptr<LayerAnimationController>
+AnimationRegistrar::GetAnimationControllerForId(int id)
+{
+    scoped_refptr<LayerAnimationController> toReturn;
+    if (!ContainsKey(all_animation_controllers_, id)) {
+        toReturn = LayerAnimationController::create(id);
+        toReturn->setAnimationRegistrar(this);
+        all_animation_controllers_[id] = toReturn.get();
+    } else
+        toReturn = all_animation_controllers_[id];
+    return toReturn;
+}
+
+void AnimationRegistrar::DidActivateAnimationController(LayerAnimationController* controller) {
+    active_animation_controllers_[controller->id()] = controller;
+}
+
+void AnimationRegistrar::DidDeactivateAnimationController(LayerAnimationController* controller) {
+    if (ContainsKey(active_animation_controllers_, controller->id()))
+        active_animation_controllers_.erase(controller->id());
+}
+
+void AnimationRegistrar::RegisterAnimationController(LayerAnimationController* controller) {
+    all_animation_controllers_[controller->id()] = controller;
+}
+
+void AnimationRegistrar::UnregisterAnimationController(LayerAnimationController* controller) {
+    if (ContainsKey(all_animation_controllers_, controller->id()))
+        all_animation_controllers_.erase(controller->id());
+    DidDeactivateAnimationController(controller);
+}
+
+}  // namespace cc