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// Copyright 2014 The Chromium Authors
// 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/interpolable_value.h"
#include <memory>
#include "third_party/blink/renderer/core/animation/css_color_interpolation_type.h"
#include "third_party/blink/renderer/core/animation/interpolable_style_color.h"
#include "third_party/blink/renderer/core/css/css_math_expression_node.h"
#include "third_party/blink/renderer/core/css/css_math_function_value.h"
#include "third_party/blink/renderer/core/css/css_numeric_literal_value.h"
namespace blink {
namespace {
using UnitType = CSSPrimitiveValue::UnitType;
CSSMathExpressionNode* NumberNode(double number,
UnitType unit_type = UnitType::kNumber) {
return CSSMathExpressionNumericLiteral::Create(
CSSNumericLiteralValue::Create(number, unit_type));
}
} // namespace
InterpolableNumber::InterpolableNumber(double value, UnitType unit_type) {
SetDouble(value, unit_type);
}
InterpolableNumber::InterpolableNumber(
const CSSMathExpressionNode& expression) {
SetExpression(expression);
}
InterpolableNumber::InterpolableNumber(const CSSPrimitiveValue& value) {
if (const auto* numeric = DynamicTo<CSSNumericLiteralValue>(value)) {
SetDouble(numeric->DoubleValue(), numeric->GetType());
} else {
CHECK(value.IsMathFunctionValue());
const auto& function = To<CSSMathFunctionValue>(value);
SetExpression(*function.ExpressionNode());
}
}
double InterpolableNumber::Value(
const CSSLengthResolver& length_resolver) const {
if (IsDoubleValue()) {
return value_ *
CSSPrimitiveValue::ConversionToCanonicalUnitsScaleFactor(unit_type_);
}
std::optional<double> result =
expression_->ComputeValueInCanonicalUnit(length_resolver);
CHECK(result.has_value());
return result.value();
}
void InterpolableNumber::SetExpression(
const CSSMathExpressionNode& expression) {
type_ = Type::kExpression;
expression_ = &expression;
unit_type_ = expression.ResolvedUnitType();
}
void InterpolableNumber::SetDouble(double value, UnitType unit_type) {
type_ = Type::kDouble;
value_ = value;
unit_type_ = unit_type;
}
const CSSMathExpressionNode& InterpolableNumber::AsExpression() const {
if (IsExpression()) {
return *expression_;
}
return *NumberNode(value_, unit_type_);
}
bool InterpolableNumber::Equals(const InterpolableValue& other) const {
const auto& other_number = To<InterpolableNumber>(other);
if (IsDoubleValue() && other_number.IsDoubleValue() &&
unit_type_ == other_number.unit_type_) {
return value_ == To<InterpolableNumber>(other).value_;
}
return AsExpression() == other_number.AsExpression();
}
bool InterpolableList::Equals(const InterpolableValue& other) const {
const auto& other_list = To<InterpolableList>(other);
if (length() != other_list.length())
return false;
for (wtf_size_t i = 0; i < length(); i++) {
if (!values_[i]->Equals(*other_list.values_[i]))
return false;
}
return true;
}
void InterpolableNumber::AssertCanInterpolateWith(
const InterpolableValue& other) const {
DCHECK(other.IsNumber());
}
double InterpolableNumber::Interpolate(double from,
double to,
double progress) {
if (progress == 0 || from == to) {
return from;
} else if (progress == 1) {
return to;
} else {
return from * (1 - progress) + to * progress;
}
}
void InterpolableNumber::Interpolate(const InterpolableValue& to,
const double progress,
InterpolableValue& result) const {
const auto& to_number = To<InterpolableNumber>(to);
auto& result_number = To<InterpolableNumber>(result);
if (IsDoubleValue() && to_number.IsDoubleValue() &&
unit_type_ == to_number.unit_type_) {
result_number.SetDouble(Interpolate(value_, to_number.Value(), progress),
unit_type_);
return;
}
const CSSMathExpressionNode* blended_from =
CSSMathExpressionOperation::CreateArithmeticOperationAndSimplifyCalcSize(
&AsExpression(), NumberNode(1 - progress),
CSSMathOperator::kMultiply);
const CSSMathExpressionNode* blended_to =
CSSMathExpressionOperation::CreateArithmeticOperationAndSimplifyCalcSize(
&to_number.AsExpression(), NumberNode(progress),
CSSMathOperator::kMultiply);
const CSSMathExpressionNode* result_expression =
CSSMathExpressionOperation::CreateArithmeticOperationAndSimplifyCalcSize(
blended_from, blended_to, CSSMathOperator::kAdd);
result_number.SetExpression(*result_expression);
}
void InterpolableList::AssertCanInterpolateWith(
const InterpolableValue& other) const {
DCHECK(other.IsList());
DCHECK_EQ(To<InterpolableList>(other).length(), length());
}
void InterpolableList::Interpolate(const InterpolableValue& to,
const double progress,
InterpolableValue& result) const {
const auto& to_list = To<InterpolableList>(to);
auto& result_list = To<InterpolableList>(result);
for (wtf_size_t i = 0; i < length(); i++) {
DCHECK(values_[i]);
DCHECK(to_list.values_[i]);
if (values_[i]->IsStyleColor() || to_list.values_[i]->IsStyleColor() ||
result_list.values_[i]->IsStyleColor()) {
CSSColorInterpolationType::EnsureInterpolableStyleColor(result_list, i);
InterpolableStyleColor::Interpolate(*values_[i], *(to_list.values_[i]),
progress, *(result_list.values_[i]));
continue;
}
values_[i]->Interpolate(*(to_list.values_[i]), progress,
*(result_list.values_[i]));
}
}
InterpolableList* InterpolableList::RawCloneAndZero() const {
auto* result = MakeGarbageCollected<InterpolableList>(length());
for (wtf_size_t i = 0; i < length(); i++) {
result->Set(i, values_[i]->CloneAndZero());
}
return result;
}
void InterpolableNumber::Scale(double scale) {
if (IsDoubleValue()) {
value_ *= scale;
return;
}
SetExpression(
*CSSMathExpressionOperation::CreateArithmeticOperationAndSimplifyCalcSize(
&AsExpression(), NumberNode(scale), CSSMathOperator::kMultiply));
}
void InterpolableNumber::Scale(const InterpolableNumber& other) {
if (IsDoubleValue() && other.IsDoubleValue() &&
(unit_type_ == CSSPrimitiveValue::UnitType::kNumber ||
other.unit_type_ == CSSPrimitiveValue::UnitType::kNumber)) {
SetDouble(
value_ * other.value_,
(unit_type_ == CSSPrimitiveValue::UnitType::kNumber ? other.unit_type_
: unit_type_));
return;
}
SetExpression(
*CSSMathExpressionOperation::CreateArithmeticOperationAndSimplifyCalcSize(
&AsExpression(), &other.AsExpression(), CSSMathOperator::kMultiply));
}
void InterpolableList::Scale(double scale) {
for (wtf_size_t i = 0; i < length(); i++)
values_[i]->Scale(scale);
}
void InterpolableNumber::Add(const InterpolableValue& other) {
const auto& other_number = To<InterpolableNumber>(other);
if (IsDoubleValue() && other_number.IsDoubleValue() &&
unit_type_ == other_number.unit_type_) {
value_ += other_number.value_;
return;
}
const CSSMathExpressionNode* result =
CSSMathExpressionOperation::CreateArithmeticOperationAndSimplifyCalcSize(
&AsExpression(), &other_number.AsExpression(), CSSMathOperator::kAdd);
SetExpression(*result);
}
void InterpolableList::Add(const InterpolableValue& other) {
const auto& other_list = To<InterpolableList>(other);
DCHECK_EQ(other_list.length(), length());
for (wtf_size_t i = 0; i < length(); i++)
values_[i]->Add(*other_list.values_[i]);
}
void InterpolableList::ScaleAndAdd(double scale,
const InterpolableValue& other) {
const auto& other_list = To<InterpolableList>(other);
DCHECK_EQ(other_list.length(), length());
for (wtf_size_t i = 0; i < length(); i++)
values_[i]->ScaleAndAdd(scale, *other_list.values_[i]);
}
} // namespace blink
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