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// Copyright 2015 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_CSS_DEFAULT_INTERPOLATION_TYPE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_CSS_DEFAULT_INTERPOLATION_TYPE_H_
#include "third_party/blink/renderer/core/animation/interpolation_type.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/heap/persistent.h"
namespace blink {
class CORE_EXPORT CSSDefaultNonInterpolableValue : public NonInterpolableValue {
public:
~CSSDefaultNonInterpolableValue() final = default;
static scoped_refptr<CSSDefaultNonInterpolableValue> Create(
const CSSValue* css_value) {
return base::AdoptRef(new CSSDefaultNonInterpolableValue(css_value));
}
const CSSValue* CssValue() const { return css_value_.Get(); }
DECLARE_NON_INTERPOLABLE_VALUE_TYPE();
private:
CSSDefaultNonInterpolableValue(const CSSValue*);
Persistent<const CSSValue> css_value_;
};
template <>
struct DowncastTraits<CSSDefaultNonInterpolableValue> {
static bool AllowFrom(const NonInterpolableValue* value) {
return value && AllowFrom(*value);
}
static bool AllowFrom(const NonInterpolableValue& value) {
return value.GetType() == CSSDefaultNonInterpolableValue::static_type_;
}
};
// Never supports pairwise conversion while always supporting single conversion.
// A catch all default for CSSValue interpolation.
class CSSDefaultInterpolationType : public InterpolationType {
public:
CSSDefaultInterpolationType(PropertyHandle property)
: InterpolationType(property) {
DCHECK(property.IsCSSProperty());
}
InterpolationValue MaybeConvertSingle(const PropertySpecificKeyframe&,
const InterpolationEnvironment&,
const InterpolationValue& underlying,
ConversionCheckers&) const override;
PairwiseInterpolationValue MaybeConvertPairwise(
const PropertySpecificKeyframe& start_keyframe,
const PropertySpecificKeyframe& end_keyframe,
const InterpolationEnvironment&,
const InterpolationValue& underlying,
ConversionCheckers&) const final {
return nullptr;
}
InterpolationValue MaybeConvertUnderlyingValue(
const InterpolationEnvironment&) const final {
return nullptr;
}
void Composite(UnderlyingValueOwner& underlying_value_owner,
double underlying_fraction,
const InterpolationValue& value,
double interpolation_fraction) const final {
underlying_value_owner.Set(*this, value);
}
void Apply(const InterpolableValue&,
const NonInterpolableValue*,
InterpolationEnvironment&) const final;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_CSS_DEFAULT_INTERPOLATION_TYPE_H_
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