src/cc/animation/layer_animation_controller.h

   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_LAYER_ANIMATION_CONTROLLER_H_
   6 #define CC_ANIMATION_LAYER_ANIMATION_CONTROLLER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/containers/hash_tables.h"
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/observer_list.h"
  13 #include "base/time/time.h"
  14 #include "cc/animation/animation_events.h"
  15 #include "cc/animation/layer_animation_event_observer.h"
  16 #include "cc/base/cc_export.h"
  17 #include "cc/base/scoped_ptr_vector.h"
  18 #include "ui/gfx/transform.h"
  19
  20 namespace gfx {
  21 class BoxF;
  22 class Transform;
  23 }
  24
  25 namespace cc {
  26
  27 class Animation;
  28 class AnimationDelegate;
  29 class AnimationRegistrar;
  30 class FilterOperations;
  31 class KeyframeValueList;
  32 class LayerAnimationValueObserver;
  33 class LayerAnimationValueProvider;
  34
  35 class CC_EXPORT LayerAnimationController
  36     : public base::RefCounted<LayerAnimationController> {
  37  public:
  38   static scoped_refptr<LayerAnimationController> Create(int id);
  39
  40   int id() const { return id_; }
  41
  42   void AddAnimation(scoped_ptr<Animation> animation);
  43   void PauseAnimation(int animation_id, double time_offset);
  44   void RemoveAnimation(int animation_id);
  45   void RemoveAnimation(int animation_id,
  46                        Animation::TargetProperty target_property);
  47   void AbortAnimations(Animation::TargetProperty target_property);
  48
  49   // Ensures that the list of active animations on the main thread and the impl
  50   // thread are kept in sync. This function does not take ownership of the impl
  51   // thread controller. This method is virtual for testing.
  52   virtual void PushAnimationUpdatesTo(
  53       LayerAnimationController* controller_impl);
  54
  55   void Animate(double monotonic_time);
  56   void AccumulatePropertyUpdates(double monotonic_time,
  57                                  AnimationEventsVector* events);
  58
  59   void UpdateState(bool start_ready_animations,
  60                    AnimationEventsVector* events);
  61
  62   // Make animations affect active observers if and only if they affect
  63   // pending observers. Any animations that no longer affect any observers
  64   // are deleted.
  65   void ActivateAnimations();
  66
  67   // Returns the active animation in the given group, animating the given
  68   // property, if such an animation exists.
  69   Animation* GetAnimation(int group_id,
  70                           Animation::TargetProperty target_property) const;
  71
  72   // Returns the active animation animating the given property that is either
  73   // running, or is next to run, if such an animation exists.
  74   Animation* GetAnimation(Animation::TargetProperty target_property) const;
  75
  76   // Returns true if there are any animations that have neither finished nor
  77   // aborted.
  78   bool HasActiveAnimation() const;
  79
  80   // Returns true if there are any animations at all to process.
  81   bool has_any_animation() const { return !animations_.empty(); }
  82
  83   // Returns true if there is an animation currently animating the given
  84   // property, or if there is an animation scheduled to animate this property in
  85   // the future.
  86   bool IsAnimatingProperty(Animation::TargetProperty target_property) const;
  87
  88   void SetAnimationRegistrar(AnimationRegistrar* registrar);
  89   AnimationRegistrar* animation_registrar() { return registrar_; }
  90
  91   void NotifyAnimationStarted(const AnimationEvent& event);
  92   void NotifyAnimationFinished(const AnimationEvent& event);
  93   void NotifyAnimationAborted(const AnimationEvent& event);
  94   void NotifyAnimationPropertyUpdate(const AnimationEvent& event);
  95
  96   void AddValueObserver(LayerAnimationValueObserver* observer);
  97   void RemoveValueObserver(LayerAnimationValueObserver* observer);
  98
  99   void AddEventObserver(LayerAnimationEventObserver* observer);
 100   void RemoveEventObserver(LayerAnimationEventObserver* observer);
 101
 102   void set_value_provider(LayerAnimationValueProvider* provider) {
 103     value_provider_ = provider;
 104   }
 105
 106   void remove_value_provider(LayerAnimationValueProvider* provider) {
 107     if (value_provider_ == provider)
 108       value_provider_ = NULL;
 109   }
 110
 111   void set_layer_animation_delegate(AnimationDelegate* delegate) {
 112     layer_animation_delegate_ = delegate;
 113   }
 114
 115   bool HasFilterAnimationThatInflatesBounds() const;
 116   bool HasTransformAnimationThatInflatesBounds() const;
 117   bool HasAnimationThatInflatesBounds() const {
 118     return HasTransformAnimationThatInflatesBounds() ||
 119            HasFilterAnimationThatInflatesBounds();
 120   }
 121
 122   bool FilterAnimationBoundsForBox(const gfx::BoxF& box,
 123                                    gfx::BoxF* bounds) const;
 124   bool TransformAnimationBoundsForBox(const gfx::BoxF& box,
 125                                       gfx::BoxF* bounds) const;
 126
 127   bool HasAnimationThatAffectsScale() const;
 128
 129   bool HasOnlyTranslationTransforms() const;
 130
 131   // Sets |max_scale| to the maximum scale along any dimension during active
 132   // animations. Returns false if the maximum scale cannot be computed.
 133   bool MaximumScale(float* max_scale) const;
 134
 135   bool needs_to_start_animations_for_testing() {
 136     return needs_to_start_animations_;
 137   }
 138
 139  protected:
 140   friend class base::RefCounted<LayerAnimationController>;
 141
 142   explicit LayerAnimationController(int id);
 143   virtual ~LayerAnimationController();
 144
 145  private:
 146   typedef base::hash_set<int> TargetProperties;
 147
 148   void PushNewAnimationsToImplThread(
 149       LayerAnimationController* controller_impl) const;
 150   void RemoveAnimationsCompletedOnMainThread(
 151       LayerAnimationController* controller_impl) const;
 152   void PushPropertiesToImplThread(
 153       LayerAnimationController* controller_impl) const;
 154
 155   void StartAnimations(double monotonic_time);
 156   void PromoteStartedAnimations(double monotonic_time,
 157                                 AnimationEventsVector* events);
 158   void MarkFinishedAnimations(double monotonic_time);
 159   void MarkAnimationsForDeletion(double monotonic_time,
 160                                  AnimationEventsVector* events);
 161   void PurgeAnimationsMarkedForDeletion();
 162
 163   void TickAnimations(double monotonic_time);
 164
 165   enum UpdateActivationType {
 166     NormalActivation,
 167     ForceActivation
 168   };
 169   void UpdateActivation(UpdateActivationType type);
 170
 171   void NotifyObserversOpacityAnimated(float opacity,
 172                                       bool notify_active_observers,
 173                                       bool notify_pending_observers);
 174   void NotifyObserversTransformAnimated(const gfx::Transform& transform,
 175                                         bool notify_active_observers,
 176                                         bool notify_pending_observers);
 177   void NotifyObserversFilterAnimated(const FilterOperations& filter,
 178                                      bool notify_active_observers,
 179                                      bool notify_pending_observers);
 180   void NotifyObserversScrollOffsetAnimated(const gfx::Vector2dF& scroll_offset,
 181                                            bool notify_active_observers,
 182                                            bool notify_pending_observers);
 183
 184   void NotifyObserversAnimationWaitingForDeletion();
 185
 186   bool HasValueObserver();
 187   bool HasActiveValueObserver();
 188
 189   AnimationRegistrar* registrar_;
 190   int id_;
 191   ScopedPtrVector<Animation> animations_;
 192
 193   // This is used to ensure that we don't spam the registrar.
 194   bool is_active_;
 195
 196   double last_tick_time_;
 197
 198   ObserverList<LayerAnimationValueObserver> value_observers_;
 199   ObserverList<LayerAnimationEventObserver> event_observers_;
 200
 201   LayerAnimationValueProvider* value_provider_;
 202
 203   AnimationDelegate* layer_animation_delegate_;
 204
 205   // Only try to start animations when new animations are added or when the
 206   // previous attempt at starting animations failed to start all animations.
 207   bool needs_to_start_animations_;
 208
 209   DISALLOW_COPY_AND_ASSIGN(LayerAnimationController);
 210 };
 211
 212 }  // namespace cc
 213
 214 #endif  // CC_ANIMATION_LAYER_ANIMATION_CONTROLLER_H_