third_party/WebKit/Source/core/animation/EffectStack.h

/*
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#ifndef EffectStack_h
#define EffectStack_h

#include "core/CoreExport.h"
#include "core/animation/Animation.h"
#include "core/animation/EffectModel.h"
#include "core/animation/KeyframeEffect.h"
#include "core/animation/PropertyHandle.h"
#include "core/animation/SampledEffect.h"
#include "platform/geometry/FloatBox.h"
#include "wtf/HashSet.h"
#include "wtf/Vector.h"

namespace blink {

using ActiveInterpolationsMap = HashMap<PropertyHandle, ActiveInterpolations>;

class InertEffect;

// Represents the order in which a sequence of SampledEffects should apply.
// This sequence is broken down to per PropertyHandle granularity.
class CORE_EXPORT EffectStack {
  DISALLOW_NEW();
  WTF_MAKE_NONCOPYABLE(EffectStack);

 public:
  EffectStack();

  void add(SampledEffect* sampledEffect) {
    m_sampledEffects.push_back(sampledEffect);
  }
  bool isEmpty() const { return m_sampledEffects.isEmpty(); }
  bool hasActiveAnimationsOnCompositor(CSSPropertyID) const;

  using PropertyHandleFilter = bool (*)(const PropertyHandle&);
  bool affectsProperties(PropertyHandleFilter) const;
  static ActiveInterpolationsMap activeInterpolations(
      EffectStack*,
      const HeapVector<Member<const InertEffect>>* newAnimations,
      const HeapHashSet<Member<const Animation>>* suppressedAnimations,
      KeyframeEffectReadOnly::Priority,
      PropertyHandleFilter = nullptr);

  bool getAnimatedBoundingBox(FloatBox&, CSSPropertyID) const;
  DECLARE_TRACE();

 private:
  void removeRedundantSampledEffects();

  // Effects sorted by priority. Lower priority at the start of the list.
  HeapVector<Member<SampledEffect>> m_sampledEffects;

  friend class AnimationEffectStackTest;
};

}  // namespace blink

#endif  // EffectStack_h