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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_UNDERLYING_VALUE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_UNDERLYING_VALUE_H_
#include "third_party/blink/renderer/core/core_export.h"
namespace blink {
class InterpolableValue;
class NonInterpolableValue;
// Represents the 'underlying value' modified by an 'effect stack'.
//
// This is a virtual class because the representation of the underlying
// value may vary depending on circumstance. See UnderlyingValueOwner,
// and UnderlyingItemValue.
//
// https://drafts.csswg.org/web-animations-1/#underlying-value
// https://drafts.csswg.org/web-animations-1/#effect-stack
class CORE_EXPORT UnderlyingValue {
public:
virtual InterpolableValue& MutableInterpolableValue() = 0;
virtual void SetInterpolableValue(std::unique_ptr<InterpolableValue>) = 0;
virtual const NonInterpolableValue* GetNonInterpolableValue() const = 0;
// The NonInterpolableValue part of the underlying value may not be mutated,
// hence there is no MutableNonInterpolableValue function. However, the
// NonInterpolableValue part may be replaced entirely with this function.
virtual void SetNonInterpolableValue(
scoped_refptr<const NonInterpolableValue>) = 0;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_UNDERLYING_VALUE_H_
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