cc/animation/element_animations.h

   1 // Copyright 2015 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_ELEMENT_ANIMATIONS_H_
   6 #define CC_ANIMATION_ELEMENT_ANIMATIONS_H_
   7
   8 #include "base/containers/linked_list.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "cc/animation/animation_delegate.h"
  11 #include "cc/animation/layer_animation_controller.h"
  12 #include "cc/animation/layer_animation_value_provider.h"
  13 #include "cc/base/cc_export.h"
  14
  15 namespace gfx {
  16 class ScrollOffset;
  17 class Transform;
  18 }
  19
  20 namespace cc {
  21
  22 class AnimationHost;
  23 class AnimationPlayer;
  24 class FilterOperations;
  25 class LayerAnimationController;
  26 enum class LayerTreeType;
  27
  28 // An ElementAnimations owns a list of all AnimationPlayers, attached to
  29 // the layer. Also, it owns LayerAnimationController instance (1:1
  30 // relationship)
  31 // ElementAnimations object redirects all events from LAC to the list
  32 // of animation layers.
  33 // This is a CC counterpart for blink::ElementAnimations (in 1:1 relationship).
  34 // No pointer to/from respective blink::ElementAnimations object for now.
  35 class CC_EXPORT ElementAnimations : public AnimationDelegate,
  36                                     public LayerAnimationValueProvider {
  37  public:
  38   static scoped_ptr<ElementAnimations> Create(AnimationHost* host);
  39   ~ElementAnimations() override;
  40
  41   int layer_id() const {
  42     return layer_animation_controller_ ? layer_animation_controller_->id() : 0;
  43   }
  44
  45   // Parent AnimationHost.
  46   AnimationHost* animation_host() { return animation_host_; }
  47   const AnimationHost* animation_host() const { return animation_host_; }
  48
  49   LayerAnimationController* layer_animation_controller() const {
  50     return layer_animation_controller_.get();
  51   }
  52
  53   void CreateLayerAnimationController(int layer_id);
  54   void DestroyLayerAnimationController();
  55
  56   void LayerRegistered(int layer_id, LayerTreeType tree_type);
  57   void LayerUnregistered(int layer_id, LayerTreeType tree_type);
  58
  59   bool has_active_value_observer_for_testing() const {
  60     return active_value_observer_;
  61   }
  62   bool has_pending_value_observer_for_testing() const {
  63     return pending_value_observer_;
  64   }
  65
  66   void AddPlayer(AnimationPlayer* player);
  67   void RemovePlayer(AnimationPlayer* player);
  68   bool IsEmpty() const;
  69
  70   typedef base::LinkedList<AnimationPlayer> PlayersList;
  71   typedef base::LinkNode<AnimationPlayer> PlayersListNode;
  72   const PlayersList& players_list() const { return *players_list_.get(); }
  73
  74   void PushPropertiesTo(ElementAnimations* element_animations_impl);
  75
  76  private:
  77   explicit ElementAnimations(AnimationHost* host);
  78
  79   void SetFilterMutated(LayerTreeType tree_type,
  80                         const FilterOperations& filters);
  81   void SetOpacityMutated(LayerTreeType tree_type, float opacity);
  82   void SetTransformMutated(LayerTreeType tree_type,
  83                            const gfx::Transform& transform);
  84   void SetScrollOffsetMutated(LayerTreeType tree_type,
  85                               const gfx::ScrollOffset& scroll_offset);
  86
  87   void CreateActiveValueObserver();
  88   void DestroyActiveValueObserver();
  89
  90   void CreatePendingValueObserver();
  91   void DestroyPendingValueObserver();
  92
  93   // AnimationDelegate implementation
  94   void NotifyAnimationStarted(base::TimeTicks monotonic_time,
  95                               Animation::TargetProperty target_property,
  96                               int group) override;
  97   void NotifyAnimationFinished(base::TimeTicks monotonic_time,
  98                                Animation::TargetProperty target_property,
  99                                int group) override;
 100
 101   // LayerAnimationValueProvider implementation.
 102   gfx::ScrollOffset ScrollOffsetForAnimation() const override;
 103
 104   scoped_ptr<PlayersList> players_list_;
 105
 106   class ValueObserver;
 107   scoped_ptr<ValueObserver> active_value_observer_;
 108   scoped_ptr<ValueObserver> pending_value_observer_;
 109
 110   // LAC is owned by ElementAnimations (1:1 relationship).
 111   scoped_refptr<LayerAnimationController> layer_animation_controller_;
 112   AnimationHost* animation_host_;
 113
 114   DISALLOW_COPY_AND_ASSIGN(ElementAnimations);
 115 };
 116
 117 }  // namespace cc
 118
 119 #endif  // CC_ANIMATION_ELEMENT_ANIMATIONS_H_