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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_shadow_list_interpolation_type.h"
#include <memory>
#include <utility>
#include "base/memory/ptr_util.h"
#include "third_party/blink/renderer/core/animation/list_interpolation_functions.h"
#include "third_party/blink/renderer/core/animation/shadow_interpolation_functions.h"
#include "third_party/blink/renderer/core/css/css_identifier_value.h"
#include "third_party/blink/renderer/core/css/css_property_names.h"
#include "third_party/blink/renderer/core/css/css_value_list.h"
#include "third_party/blink/renderer/core/css/resolver/style_builder.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/core/style/shadow_list.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
namespace blink {
namespace {
const ShadowList* GetShadowList(const CSSProperty& property,
const ComputedStyle& style) {
switch (property.PropertyID()) {
case CSSPropertyBoxShadow:
return style.BoxShadow();
case CSSPropertyTextShadow:
return style.TextShadow();
default:
NOTREACHED();
return nullptr;
}
}
} // namespace
InterpolationValue CSSShadowListInterpolationType::ConvertShadowList(
const ShadowList* shadow_list,
double zoom) const {
if (!shadow_list)
return CreateNeutralValue();
const ShadowDataVector& shadows = shadow_list->Shadows();
return ListInterpolationFunctions::CreateList(
shadows.size(), [&shadows, zoom](wtf_size_t index) {
return ShadowInterpolationFunctions::ConvertShadowData(shadows[index],
zoom);
});
}
InterpolationValue CSSShadowListInterpolationType::CreateNeutralValue() const {
return ListInterpolationFunctions::CreateEmptyList();
}
InterpolationValue CSSShadowListInterpolationType::MaybeConvertNeutral(
const InterpolationValue&,
ConversionCheckers&) const {
return CreateNeutralValue();
}
InterpolationValue CSSShadowListInterpolationType::MaybeConvertInitial(
const StyleResolverState&,
ConversionCheckers&) const {
return CreateNeutralValue();
}
class InheritedShadowListChecker
: public CSSInterpolationType::CSSConversionChecker {
public:
static std::unique_ptr<InheritedShadowListChecker> Create(
const CSSProperty& property,
scoped_refptr<ShadowList> shadow_list) {
return base::WrapUnique(
new InheritedShadowListChecker(property, std::move(shadow_list)));
}
private:
InheritedShadowListChecker(const CSSProperty& property,
scoped_refptr<ShadowList> shadow_list)
: property_(property), shadow_list_(std::move(shadow_list)) {}
bool IsValid(const StyleResolverState& state,
const InterpolationValue& underlying) const final {
const ShadowList* inherited_shadow_list =
GetShadowList(property_, *state.ParentStyle());
if (!inherited_shadow_list && !shadow_list_)
return true;
if (!inherited_shadow_list || !shadow_list_)
return false;
return *inherited_shadow_list == *shadow_list_;
}
const CSSProperty& property_;
scoped_refptr<ShadowList> shadow_list_;
};
InterpolationValue CSSShadowListInterpolationType::MaybeConvertInherit(
const StyleResolverState& state,
ConversionCheckers& conversion_checkers) const {
if (!state.ParentStyle())
return nullptr;
const ShadowList* inherited_shadow_list =
GetShadowList(CssProperty(), *state.ParentStyle());
conversion_checkers.push_back(InheritedShadowListChecker::Create(
CssProperty(),
const_cast<ShadowList*>(inherited_shadow_list))); // Take ref.
return ConvertShadowList(inherited_shadow_list,
state.ParentStyle()->EffectiveZoom());
}
InterpolationValue CSSShadowListInterpolationType::MaybeConvertValue(
const CSSValue& value,
const StyleResolverState*,
ConversionCheckers&) const {
if (value.IsIdentifierValue() &&
ToCSSIdentifierValue(value).GetValueID() == CSSValueNone)
return CreateNeutralValue();
if (!value.IsBaseValueList())
return nullptr;
const CSSValueList& value_list = ToCSSValueList(value);
return ListInterpolationFunctions::CreateList(
value_list.length(), [&value_list](wtf_size_t index) {
return ShadowInterpolationFunctions::MaybeConvertCSSValue(
value_list.Item(index));
});
}
PairwiseInterpolationValue CSSShadowListInterpolationType::MaybeMergeSingles(
InterpolationValue&& start,
InterpolationValue&& end) const {
return ListInterpolationFunctions::MaybeMergeSingles(
std::move(start), std::move(end),
ListInterpolationFunctions::LengthMatchingStrategy::kPadToLargest,
WTF::BindRepeating(ShadowInterpolationFunctions::MaybeMergeSingles));
}
InterpolationValue
CSSShadowListInterpolationType::MaybeConvertStandardPropertyUnderlyingValue(
const ComputedStyle& style) const {
return ConvertShadowList(GetShadowList(CssProperty(), style),
style.EffectiveZoom());
}
void CSSShadowListInterpolationType::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::kPadToLargest,
WTF::BindRepeating(
ShadowInterpolationFunctions::NonInterpolableValuesAreCompatible),
WTF::BindRepeating(ShadowInterpolationFunctions::Composite));
}
static scoped_refptr<ShadowList> CreateShadowList(
const InterpolableValue& interpolable_value,
const NonInterpolableValue* non_interpolable_value,
const StyleResolverState& state) {
const InterpolableList& interpolable_list =
ToInterpolableList(interpolable_value);
wtf_size_t length = interpolable_list.length();
if (length == 0)
return nullptr;
const NonInterpolableList& non_interpolable_list =
ToNonInterpolableList(*non_interpolable_value);
ShadowDataVector shadows;
for (wtf_size_t i = 0; i < length; i++)
shadows.push_back(ShadowInterpolationFunctions::CreateShadowData(
*interpolable_list.Get(i), non_interpolable_list.Get(i), state));
return ShadowList::Adopt(shadows);
}
void CSSShadowListInterpolationType::ApplyStandardPropertyValue(
const InterpolableValue& interpolable_value,
const NonInterpolableValue* non_interpolable_value,
StyleResolverState& state) const {
scoped_refptr<ShadowList> shadow_list =
CreateShadowList(interpolable_value, non_interpolable_value, state);
switch (CssProperty().PropertyID()) {
case CSSPropertyBoxShadow:
state.Style()->SetBoxShadow(std::move(shadow_list));
return;
case CSSPropertyTextShadow:
state.Style()->SetTextShadow(std::move(shadow_list));
return;
default:
NOTREACHED();
}
}
} // namespace blink
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