1 // Copyright 2019 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 UI_GFX_ANIMATION_ANIMATION_DELEGATE_NOTIFIER_H_
6 #define UI_GFX_ANIMATION_ANIMATION_DELEGATE_NOTIFIER_H_
7 
8 #include "base/check.h"
9 #include "ui/gfx/animation/animation_delegate.h"
10 
11 namespace gfx {
12 
13 // AnimationDelegateNotifier adapts AnimationDelegate (which is used by
14 // inheritance) into an object that is used by composition. This can be useful
15 // to compose the functionality of an AnimationDelegate subclass into an object
16 // that inherits directly from AnimationDelegate.
17 template <class AnimationDelegateType = gfx::AnimationDelegate>
18 class AnimationDelegateNotifier : public AnimationDelegateType {
19  public:
20   template <typename... Args>
AnimationDelegateNotifier(gfx::AnimationDelegate * owner,Args &&...args)21   AnimationDelegateNotifier(gfx::AnimationDelegate* owner, Args&&... args)
22       : AnimationDelegateType(std::forward<Args>(args)...), owner_(owner) {
23     DCHECK(owner_);
24   }
25 
26   ~AnimationDelegateNotifier() override = default;
27 
28   // AnimationDelegateType:
AnimationEnded(const Animation * animation)29   void AnimationEnded(const Animation* animation) override {
30     AnimationDelegateType::AnimationEnded(animation);
31     owner_->AnimationEnded(animation);
32   }
33 
AnimationProgressed(const Animation * animation)34   void AnimationProgressed(const Animation* animation) override {
35     AnimationDelegateType::AnimationProgressed(animation);
36     owner_->AnimationProgressed(animation);
37   }
38 
AnimationCanceled(const Animation * animation)39   void AnimationCanceled(const Animation* animation) override {
40     AnimationDelegateType::AnimationCanceled(animation);
41     owner_->AnimationCanceled(animation);
42   }
43 
AnimationContainerWasSet(AnimationContainer * container)44   void AnimationContainerWasSet(AnimationContainer* container) override {
45     AnimationDelegateType::AnimationContainerWasSet(container);
46     owner_->AnimationContainerWasSet(container);
47   }
48 
49  private:
50   gfx::AnimationDelegate* const owner_;
51 };
52 
53 }  // namespace gfx
54 
55 #endif  // UI_GFX_ANIMATION_ANIMATION_DELEGATE_NOTIFIER_H_
56