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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/shadow_interpolation_functions.h"
#include <memory>
#include "third_party/blink/renderer/core/animation/css_color_interpolation_type.h"
#include "third_party/blink/renderer/core/animation/interpolation_value.h"
#include "third_party/blink/renderer/core/animation/length_interpolation_functions.h"
#include "third_party/blink/renderer/core/animation/non_interpolable_value.h"
#include "third_party/blink/renderer/core/css/css_identifier_value.h"
#include "third_party/blink/renderer/core/css/css_shadow_value.h"
#include "third_party/blink/renderer/core/css/resolver/style_resolver_state.h"
#include "third_party/blink/renderer/core/style/shadow_data.h"
#include "third_party/blink/renderer/platform/geometry/float_point.h"
namespace blink {
enum ShadowComponentIndex : unsigned {
kShadowX,
kShadowY,
kShadowBlur,
kShadowSpread,
kShadowColor,
kShadowComponentIndexCount,
};
class ShadowNonInterpolableValue : public NonInterpolableValue {
public:
~ShadowNonInterpolableValue() final = default;
static scoped_refptr<ShadowNonInterpolableValue> Create(
ShadowStyle shadow_style) {
return base::AdoptRef(new ShadowNonInterpolableValue(shadow_style));
}
ShadowStyle Style() const { return style_; }
DECLARE_NON_INTERPOLABLE_VALUE_TYPE();
private:
ShadowNonInterpolableValue(ShadowStyle shadow_style) : style_(shadow_style) {}
ShadowStyle style_;
};
DEFINE_NON_INTERPOLABLE_VALUE_TYPE(ShadowNonInterpolableValue);
DEFINE_NON_INTERPOLABLE_VALUE_TYPE_CASTS(ShadowNonInterpolableValue);
bool ShadowInterpolationFunctions::NonInterpolableValuesAreCompatible(
const NonInterpolableValue* a,
const NonInterpolableValue* b) {
return ToShadowNonInterpolableValue(*a).Style() ==
ToShadowNonInterpolableValue(*b).Style();
}
PairwiseInterpolationValue ShadowInterpolationFunctions::MaybeMergeSingles(
InterpolationValue&& start,
InterpolationValue&& end) {
if (!NonInterpolableValuesAreCompatible(start.non_interpolable_value.get(),
end.non_interpolable_value.get()))
return nullptr;
return PairwiseInterpolationValue(std::move(start.interpolable_value),
std::move(end.interpolable_value),
std::move(start.non_interpolable_value));
}
InterpolationValue ShadowInterpolationFunctions::ConvertShadowData(
const ShadowData& shadow_data,
double zoom) {
std::unique_ptr<InterpolableList> interpolable_list =
InterpolableList::Create(kShadowComponentIndexCount);
interpolable_list->Set(kShadowX,
LengthInterpolationFunctions::CreateInterpolablePixels(
shadow_data.X() / zoom));
interpolable_list->Set(kShadowY,
LengthInterpolationFunctions::CreateInterpolablePixels(
shadow_data.Y() / zoom));
interpolable_list->Set(kShadowBlur,
LengthInterpolationFunctions::CreateInterpolablePixels(
shadow_data.Blur() / zoom));
interpolable_list->Set(kShadowSpread,
LengthInterpolationFunctions::CreateInterpolablePixels(
shadow_data.Spread() / zoom));
interpolable_list->Set(kShadowColor,
CSSColorInterpolationType::CreateInterpolableColor(
shadow_data.GetColor()));
return InterpolationValue(
std::move(interpolable_list),
ShadowNonInterpolableValue::Create(shadow_data.Style()));
}
InterpolationValue ShadowInterpolationFunctions::MaybeConvertCSSValue(
const CSSValue& value) {
if (!value.IsShadowValue())
return nullptr;
const CSSShadowValue& shadow = ToCSSShadowValue(value);
ShadowStyle style = kNormal;
if (shadow.style) {
if (shadow.style->GetValueID() == CSSValueInset)
style = kInset;
else
return nullptr;
}
std::unique_ptr<InterpolableList> interpolable_list =
InterpolableList::Create(kShadowComponentIndexCount);
static_assert(kShadowX == 0, "Enum ordering check.");
static_assert(kShadowY == 1, "Enum ordering check.");
static_assert(kShadowBlur == 2, "Enum ordering check.");
static_assert(kShadowSpread == 3, "Enum ordering check.");
const CSSPrimitiveValue* lengths[] = {
shadow.x.Get(), shadow.y.Get(), shadow.blur.Get(), shadow.spread.Get(),
};
for (size_t i = 0; i < arraysize(lengths); i++) {
if (lengths[i]) {
InterpolationValue length_field =
LengthInterpolationFunctions::MaybeConvertCSSValue(*lengths[i]);
if (!length_field)
return nullptr;
DCHECK(!length_field.non_interpolable_value);
interpolable_list->Set(i, std::move(length_field.interpolable_value));
} else {
interpolable_list->Set(
i, LengthInterpolationFunctions::CreateInterpolablePixels(0));
}
}
if (shadow.color) {
std::unique_ptr<InterpolableValue> interpolable_color =
CSSColorInterpolationType::MaybeCreateInterpolableColor(*shadow.color);
if (!interpolable_color)
return nullptr;
interpolable_list->Set(kShadowColor, std::move(interpolable_color));
} else {
interpolable_list->Set(kShadowColor,
CSSColorInterpolationType::CreateInterpolableColor(
StyleColor::CurrentColor()));
}
return InterpolationValue(std::move(interpolable_list),
ShadowNonInterpolableValue::Create(style));
}
std::unique_ptr<InterpolableValue>
ShadowInterpolationFunctions::CreateNeutralInterpolableValue() {
return ConvertShadowData(ShadowData::NeutralValue(), 1).interpolable_value;
}
void ShadowInterpolationFunctions::Composite(
std::unique_ptr<InterpolableValue>& underlying_interpolable_value,
scoped_refptr<NonInterpolableValue>& underlying_non_interpolable_value,
double underlying_fraction,
const InterpolableValue& interpolable_value,
const NonInterpolableValue* non_interpolable_value) {
DCHECK(NonInterpolableValuesAreCompatible(
underlying_non_interpolable_value.get(), non_interpolable_value));
InterpolableList& underlying_interpolable_list =
ToInterpolableList(*underlying_interpolable_value);
const InterpolableList& interpolable_list =
ToInterpolableList(interpolable_value);
underlying_interpolable_list.ScaleAndAdd(underlying_fraction,
interpolable_list);
}
ShadowData ShadowInterpolationFunctions::CreateShadowData(
const InterpolableValue& interpolable_value,
const NonInterpolableValue* non_interpolable_value,
const StyleResolverState& state) {
const InterpolableList& interpolable_list =
ToInterpolableList(interpolable_value);
const ShadowNonInterpolableValue& shadow_non_interpolable_value =
ToShadowNonInterpolableValue(*non_interpolable_value);
const CSSToLengthConversionData& conversion_data =
state.CssToLengthConversionData();
Length shadow_x = LengthInterpolationFunctions::CreateLength(
*interpolable_list.Get(kShadowX), nullptr, conversion_data,
kValueRangeAll);
Length shadow_y = LengthInterpolationFunctions::CreateLength(
*interpolable_list.Get(kShadowY), nullptr, conversion_data,
kValueRangeAll);
Length shadow_blur = LengthInterpolationFunctions::CreateLength(
*interpolable_list.Get(kShadowBlur), nullptr, conversion_data,
kValueRangeNonNegative);
Length shadow_spread = LengthInterpolationFunctions::CreateLength(
*interpolable_list.Get(kShadowSpread), nullptr, conversion_data,
kValueRangeAll);
DCHECK(shadow_x.IsFixed() && shadow_y.IsFixed() && shadow_blur.IsFixed() &&
shadow_spread.IsFixed());
return ShadowData(FloatPoint(shadow_x.Value(), shadow_y.Value()),
shadow_blur.Value(), shadow_spread.Value(),
shadow_non_interpolable_value.Style(),
CSSColorInterpolationType::ResolveInterpolableColor(
*interpolable_list.Get(kShadowColor), state));
}
} // namespace blink
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