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// Copyright 2016 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.
#include "third_party/blink/renderer/core/animation/underlying_value_owner.h"
#include <memory>
namespace blink {
struct NullValueWrapper {
NullValueWrapper() : value(nullptr) {}
const InterpolationValue value;
};
InterpolableValue& UnderlyingValueOwner::MutableInterpolableValue() {
return *MutableValue().interpolable_value;
}
void UnderlyingValueOwner::SetInterpolableValue(
std::unique_ptr<InterpolableValue> interpolable_value) {
DCHECK(type_);
MutableValue().interpolable_value = std::move(interpolable_value);
}
const NonInterpolableValue* UnderlyingValueOwner::GetNonInterpolableValue()
const {
DCHECK(value_);
return value_->non_interpolable_value.get();
}
void UnderlyingValueOwner::SetNonInterpolableValue(
scoped_refptr<const NonInterpolableValue> non_interpolable_value) {
MutableValue().non_interpolable_value = non_interpolable_value;
}
const InterpolationValue& UnderlyingValueOwner::Value() const {
DEFINE_STATIC_LOCAL(NullValueWrapper, null_value_wrapper, ());
return *this ? *value_ : null_value_wrapper.value;
}
void UnderlyingValueOwner::Set(std::nullptr_t) {
type_ = nullptr;
value_owner_.Clear();
value_ = nullptr;
}
void UnderlyingValueOwner::Set(const InterpolationType& type,
const InterpolationValue& value) {
DCHECK(value);
type_ = &type;
// By clearing |value_owner_| we will perform a copy before attempting to
// mutate |value_|, thus upholding the const contract for this instance of
// interpolationValue.
value_owner_.Clear();
value_ = &value;
}
void UnderlyingValueOwner::Set(const InterpolationType& type,
InterpolationValue&& value) {
DCHECK(value);
type_ = &type;
value_owner_ = std::move(value);
value_ = &value_owner_;
}
void UnderlyingValueOwner::Set(std::unique_ptr<TypedInterpolationValue> value) {
if (value)
Set(value->GetType(), std::move(value->MutableValue()));
else
Set(nullptr);
}
void UnderlyingValueOwner::Set(const TypedInterpolationValue* value) {
if (value)
Set(value->GetType(), value->Value());
else
Set(nullptr);
}
InterpolationValue& UnderlyingValueOwner::MutableValue() {
DCHECK(type_ && value_);
if (!value_owner_) {
value_owner_ = value_->Clone();
value_ = &value_owner_;
}
return value_owner_;
}
} // namespace blink
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