animation_registrar.h revision 7d4cd473f85ac64c3747c96c277f9e506a0d2246 
1// Copyright 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CC_ANIMATION_ANIMATION_REGISTRAR_H_
6#define CC_ANIMATION_ANIMATION_REGISTRAR_H_
7
8#include "base/containers/hash_tables.h"
9#include "base/memory/ref_counted.h"
10#include "base/memory/scoped_ptr.h"
11#include "cc/base/cc_export.h"
12
13namespace cc {
14
15class LayerAnimationController;
16
17class CC_EXPORT AnimationRegistrar {
18 public:
19  typedef base::hash_map<int, LayerAnimationController*> AnimationControllerMap;
20
21  static scoped_ptr<AnimationRegistrar> Create() {
22    return make_scoped_ptr(new AnimationRegistrar());
23  }
24
25  virtual ~AnimationRegistrar();
26
27  // If an animation has been registered for the given id, return it. Otherwise
28  // creates a new one and returns a scoped_refptr to it.
29  scoped_refptr<LayerAnimationController> GetAnimationControllerForId(int id);
30
31  // Registers the given animation controller as active. An active animation
32  // controller is one that has a running animation that needs to be ticked.
33  void DidActivateAnimationController(LayerAnimationController* controller);
34
35  // Unregisters the given animation controller. When this happens, the
36  // animation controller will no longer be ticked (since it's not active). It
37  // is not an error to call this function with a deactivated controller.
38  void DidDeactivateAnimationController(LayerAnimationController* controller);
39
40  // Registers the given controller as alive.
41  void RegisterAnimationController(LayerAnimationController* controller);
42
43  // Unregisters the given controller as alive.
44  void UnregisterAnimationController(LayerAnimationController* controller);
45
46  const AnimationControllerMap& active_animation_controllers() const {
47    return active_animation_controllers_;
48  }
49
50  const AnimationControllerMap& all_animation_controllers() const {
51    return all_animation_controllers_;
52  }
53
54 private:
55  AnimationRegistrar();
56
57  AnimationControllerMap active_animation_controllers_;
58  AnimationControllerMap all_animation_controllers_;
59
60  DISALLOW_COPY_AND_ASSIGN(AnimationRegistrar);
61};
62
63}  // namespace cc
64
65#endif  // CC_ANIMATION_ANIMATION_REGISTRAR_H_
66