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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.
#include "third_party/blink/renderer/core/animation/css_number_interpolation_type.h"
#include <memory>
#include "base/memory/ptr_util.h"
#include "base/optional.h"
#include "third_party/blink/renderer/core/animation/number_property_functions.h"
#include "third_party/blink/renderer/core/css/resolver/style_builder.h"
#include "third_party/blink/renderer/core/css/resolver/style_resolver_state.h"
namespace blink {
class InheritedNumberChecker
: public CSSInterpolationType::CSSConversionChecker {
public:
InheritedNumberChecker(const CSSProperty& property,
base::Optional<double> number)
: property_(property), number_(number) {}
private:
bool IsValid(const StyleResolverState& state,
const InterpolationValue& underlying) const final {
base::Optional<double> parent_number =
NumberPropertyFunctions::GetNumber(property_, *state.ParentStyle());
return number_ == parent_number;
}
const CSSProperty& property_;
const base::Optional<double> number_;
};
const CSSValue* CSSNumberInterpolationType::CreateCSSValue(
const InterpolableValue& value,
const NonInterpolableValue*,
const StyleResolverState&) const {
double number = ToInterpolableNumber(value).Value();
return CSSPrimitiveValue::Create(round_to_integer_ ? round(number) : number,
CSSPrimitiveValue::UnitType::kNumber);
}
InterpolationValue CSSNumberInterpolationType::CreateNumberValue(
double number) const {
return InterpolationValue(std::make_unique<InterpolableNumber>(number));
}
InterpolationValue CSSNumberInterpolationType::MaybeConvertNeutral(
const InterpolationValue&,
ConversionCheckers&) const {
return CreateNumberValue(0);
}
InterpolationValue CSSNumberInterpolationType::MaybeConvertInitial(
const StyleResolverState&,
ConversionCheckers& conversion_checkers) const {
base::Optional<double> initial_number =
NumberPropertyFunctions::GetInitialNumber(CssProperty());
if (!initial_number)
return nullptr;
return CreateNumberValue(*initial_number);
}
InterpolationValue CSSNumberInterpolationType::MaybeConvertInherit(
const StyleResolverState& state,
ConversionCheckers& conversion_checkers) const {
if (!state.ParentStyle())
return nullptr;
base::Optional<double> inherited =
NumberPropertyFunctions::GetNumber(CssProperty(), *state.ParentStyle());
conversion_checkers.push_back(
std::make_unique<InheritedNumberChecker>(CssProperty(), inherited));
if (!inherited)
return nullptr;
return CreateNumberValue(*inherited);
}
InterpolationValue CSSNumberInterpolationType::MaybeConvertValue(
const CSSValue& value,
const StyleResolverState*,
ConversionCheckers&) const {
auto* primitive_value = DynamicTo<CSSPrimitiveValue>(value);
if (!primitive_value ||
!(primitive_value->IsNumber() || primitive_value->IsPercentage()))
return nullptr;
return CreateNumberValue(primitive_value->GetDoubleValue());
}
InterpolationValue
CSSNumberInterpolationType::MaybeConvertStandardPropertyUnderlyingValue(
const ComputedStyle& style) const {
base::Optional<double> underlying_number =
NumberPropertyFunctions::GetNumber(CssProperty(), style);
if (!underlying_number)
return nullptr;
return CreateNumberValue(*underlying_number);
}
void CSSNumberInterpolationType::ApplyStandardPropertyValue(
const InterpolableValue& interpolable_value,
const NonInterpolableValue*,
StyleResolverState& state) const {
double clamped_number = NumberPropertyFunctions::ClampNumber(
CssProperty(), ToInterpolableNumber(interpolable_value).Value());
if (!NumberPropertyFunctions::SetNumber(CssProperty(), *state.Style(),
clamped_number))
StyleBuilder::ApplyProperty(
GetProperty().GetCSSProperty(), state,
*CSSPrimitiveValue::Create(clamped_number,
CSSPrimitiveValue::UnitType::kNumber));
}
} // namespace blink
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