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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_length_list_interpolation_type.h"
#include <memory>
#include <utility>
#include "base/memory/ptr_util.h"
#include "third_party/blink/renderer/core/animation/interpolable_length.h"
#include "third_party/blink/renderer/core/animation/length_list_property_functions.h"
#include "third_party/blink/renderer/core/animation/list_interpolation_functions.h"
#include "third_party/blink/renderer/core/animation/underlying_length_checker.h"
#include "third_party/blink/renderer/core/css/css_primitive_value.h"
#include "third_party/blink/renderer/core/css/css_value_list.h"
#include "third_party/blink/renderer/core/css/resolver/style_resolver_state.h"
#include "third_party/blink/renderer/core/style/computed_style.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
namespace blink {
CSSLengthListInterpolationType::CSSLengthListInterpolationType(
PropertyHandle property)
: CSSInterpolationType(property),
value_range_(LengthListPropertyFunctions::GetValueRange(CssProperty())) {}
InterpolationValue CSSLengthListInterpolationType::MaybeConvertNeutral(
const InterpolationValue& underlying,
ConversionCheckers& conversion_checkers) const {
wtf_size_t underlying_length =
UnderlyingLengthChecker::GetUnderlyingLength(underlying);
conversion_checkers.push_back(
std::make_unique<UnderlyingLengthChecker>(underlying_length));
if (underlying_length == 0)
return nullptr;
return ListInterpolationFunctions::CreateList(
underlying_length, [](wtf_size_t) {
return InterpolationValue(InterpolableLength::CreateNeutral());
});
}
static InterpolationValue MaybeConvertLengthList(
const Vector<Length>& length_list,
float zoom) {
if (length_list.IsEmpty())
return nullptr;
return ListInterpolationFunctions::CreateList(
length_list.size(), [&length_list, zoom](wtf_size_t index) {
return InterpolationValue(
InterpolableLength::MaybeConvertLength(length_list[index], zoom));
});
}
InterpolationValue CSSLengthListInterpolationType::MaybeConvertInitial(
const StyleResolverState&,
ConversionCheckers& conversion_checkers) const {
Vector<Length> initial_length_list;
if (!LengthListPropertyFunctions::GetInitialLengthList(CssProperty(),
initial_length_list))
return nullptr;
return MaybeConvertLengthList(initial_length_list, 1);
}
class InheritedLengthListChecker
: public CSSInterpolationType::CSSConversionChecker {
public:
InheritedLengthListChecker(const CSSProperty& property,
const Vector<Length>& inherited_length_list)
: property_(property), inherited_length_list_(inherited_length_list) {}
~InheritedLengthListChecker() final = default;
private:
bool IsValid(const StyleResolverState& state,
const InterpolationValue& underlying) const final {
Vector<Length> inherited_length_list;
LengthListPropertyFunctions::GetLengthList(property_, *state.ParentStyle(),
inherited_length_list);
return inherited_length_list_ == inherited_length_list;
}
const CSSProperty& property_;
Vector<Length> inherited_length_list_;
};
InterpolationValue CSSLengthListInterpolationType::MaybeConvertInherit(
const StyleResolverState& state,
ConversionCheckers& conversion_checkers) const {
Vector<Length> inherited_length_list;
bool success = LengthListPropertyFunctions::GetLengthList(
CssProperty(), *state.ParentStyle(), inherited_length_list);
conversion_checkers.push_back(std::make_unique<InheritedLengthListChecker>(
CssProperty(), inherited_length_list));
if (!success)
return nullptr;
return MaybeConvertLengthList(inherited_length_list,
state.ParentStyle()->EffectiveZoom());
}
InterpolationValue CSSLengthListInterpolationType::MaybeConvertValue(
const CSSValue& value,
const StyleResolverState*,
ConversionCheckers&) const {
if (!value.IsBaseValueList())
return nullptr;
const auto& list = To<CSSValueList>(value);
return ListInterpolationFunctions::CreateList(
list.length(), [&list](wtf_size_t index) {
return InterpolationValue(
InterpolableLength::MaybeConvertCSSValue(list.Item(index)));
});
}
PairwiseInterpolationValue CSSLengthListInterpolationType::MaybeMergeSingles(
InterpolationValue&& start,
InterpolationValue&& end) const {
return ListInterpolationFunctions::MaybeMergeSingles(
std::move(start), std::move(end),
ListInterpolationFunctions::LengthMatchingStrategy::kLowestCommonMultiple,
WTF::BindRepeating(
[](InterpolationValue&& start_item, InterpolationValue&& end_item) {
return InterpolableLength::MergeSingles(
std::move(start_item.interpolable_value),
std::move(end_item.interpolable_value));
}));
}
InterpolationValue
CSSLengthListInterpolationType::MaybeConvertStandardPropertyUnderlyingValue(
const ComputedStyle& style) const {
Vector<Length> underlying_length_list;
if (!LengthListPropertyFunctions::GetLengthList(CssProperty(), style,
underlying_length_list))
return nullptr;
return MaybeConvertLengthList(underlying_length_list, style.EffectiveZoom());
}
void CSSLengthListInterpolationType::Composite(
UnderlyingValueOwner& underlying_value_owner,
double underlying_fraction,
const InterpolationValue& value,
double interpolation_fraction) const {
ListInterpolationFunctions::Composite(
underlying_value_owner, underlying_fraction, *this, value,
ListInterpolationFunctions::LengthMatchingStrategy::kLowestCommonMultiple,
WTF::BindRepeating(
ListInterpolationFunctions::InterpolableValuesKnownCompatible),
WTF::BindRepeating(
ListInterpolationFunctions::VerifyNoNonInterpolableValues),
WTF::BindRepeating([](UnderlyingValue& underlying_value,
double underlying_fraction,
const InterpolableValue& interpolable_value,
const NonInterpolableValue*) {
underlying_value.MutableInterpolableValue().ScaleAndAdd(
underlying_fraction, interpolable_value);
}));
}
void CSSLengthListInterpolationType::ApplyStandardPropertyValue(
const InterpolableValue& interpolable_value,
const NonInterpolableValue* non_interpolable_value,
StyleResolverState& state) const {
const auto& interpolable_list = To<InterpolableList>(interpolable_value);
const wtf_size_t length = interpolable_list.length();
DCHECK_GT(length, 0U);
const auto& non_interpolable_list =
To<NonInterpolableList>(*non_interpolable_value);
DCHECK_EQ(non_interpolable_list.length(), length);
Vector<Length> result(length);
for (wtf_size_t i = 0; i < length; i++) {
result[i] =
To<InterpolableLength>(*interpolable_list.Get(i))
.CreateLength(state.CssToLengthConversionData(), value_range_);
}
LengthListPropertyFunctions::SetLengthList(CssProperty(), *state.Style(),
std::move(result));
}
} // namespace blink
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