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// Copyright 2019 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/platform/geometry/calculation_value.h"
#include "third_party/blink/renderer/platform/geometry/blend.h"
#include "third_party/blink/renderer/platform/geometry/calculation_expression_node.h"
#include "third_party/blink/renderer/platform/wtf/size_assertions.h"
namespace blink {
CalculationValue::DataUnion::DataUnion(
scoped_refptr<const CalculationExpressionNode> expression)
: expression(std::move(expression)) {}
CalculationValue::DataUnion::~DataUnion() {
// Release of |expression| is left to CalculationValue::~CalculationValue().
}
// static
scoped_refptr<const CalculationValue> CalculationValue::CreateSimplified(
scoped_refptr<const CalculationExpressionNode> expression,
Length::ValueRange range) {
if (expression->IsPixelsAndPercent()) {
return Create(To<CalculationExpressionPixelsAndPercentNode>(*expression)
.GetPixelsAndPercent(),
range);
}
return base::AdoptRef(new CalculationValue(std::move(expression), range));
}
CalculationValue::CalculationValue(
scoped_refptr<const CalculationExpressionNode> expression,
Length::ValueRange range)
: data_(std::move(expression)),
is_expression_(true),
is_non_negative_(range == Length::ValueRange::kNonNegative) {}
CalculationValue::~CalculationValue() {
if (is_expression_)
data_.expression.~scoped_refptr<const CalculationExpressionNode>();
else
data_.value.~PixelsAndPercent();
}
float CalculationValue::Evaluate(float max_value,
const EvaluationInput& input) const {
float value = ClampTo<float>(
is_expression_ ? data_.expression->Evaluate(max_value, input)
: Pixels() + Percent() / 100 * max_value);
return (IsNonNegative() && value < 0) ? 0 : value;
}
bool CalculationValue::operator==(const CalculationValue& other) const {
if (IsNonNegative() != other.IsNonNegative()) {
return false;
}
if (IsExpression())
return other.IsExpression() && *data_.expression == *other.data_.expression;
return !other.IsExpression() && Pixels() == other.Pixels() &&
Percent() == other.Percent();
}
scoped_refptr<const CalculationExpressionNode>
CalculationValue::GetOrCreateExpression() const {
if (IsExpression())
return data_.expression;
return base::MakeRefCounted<CalculationExpressionPixelsAndPercentNode>(
GetPixelsAndPercent());
}
scoped_refptr<const CalculationValue> CalculationValue::Blend(
const CalculationValue& from,
double progress,
Length::ValueRange range) const {
if (!IsExpression() && !from.IsExpression()) {
PixelsAndPercent from_pixels_and_percent = from.GetPixelsAndPercent();
PixelsAndPercent to_pixels_and_percent = GetPixelsAndPercent();
const float pixels = blink::Blend(from_pixels_and_percent.pixels,
to_pixels_and_percent.pixels, progress);
const float percent = blink::Blend(from_pixels_and_percent.percent,
to_pixels_and_percent.percent, progress);
bool has_explicit_pixels = from_pixels_and_percent.has_explicit_pixels |
to_pixels_and_percent.has_explicit_pixels;
bool has_explicit_percent = from_pixels_and_percent.has_explicit_percent |
to_pixels_and_percent.has_explicit_percent;
return Create(PixelsAndPercent(pixels, percent, has_explicit_pixels,
has_explicit_percent),
range);
}
auto blended_from = CalculationExpressionOperationNode::CreateSimplified(
CalculationExpressionOperationNode::Children(
{from.GetOrCreateExpression(),
base::MakeRefCounted<CalculationExpressionNumberNode>(1.0 -
progress)}),
CalculationOperator::kMultiply);
auto blended_to = CalculationExpressionOperationNode::CreateSimplified(
CalculationExpressionOperationNode::Children(
{GetOrCreateExpression(),
base::MakeRefCounted<CalculationExpressionNumberNode>(progress)}),
CalculationOperator::kMultiply);
auto result_expression = CalculationExpressionOperationNode::CreateSimplified(
{std::move(blended_from), std::move(blended_to)},
CalculationOperator::kAdd);
return CreateSimplified(result_expression, range);
}
scoped_refptr<const CalculationValue>
CalculationValue::SubtractFromOneHundredPercent() const {
if (!IsExpression()) {
PixelsAndPercent result(-Pixels(), 100 - Percent(), HasExplicitPixels(),
/*has_explicit_percent=*/true);
return Create(result, Length::ValueRange::kAll);
}
auto hundred_percent =
base::MakeRefCounted<CalculationExpressionPixelsAndPercentNode>(
PixelsAndPercent(0, 100, false, true));
auto result_expression = CalculationExpressionOperationNode::CreateSimplified(
CalculationExpressionOperationNode::Children(
{std::move(hundred_percent), GetOrCreateExpression()}),
CalculationOperator::kSubtract);
return CreateSimplified(std::move(result_expression),
Length::ValueRange::kAll);
}
scoped_refptr<const CalculationValue> CalculationValue::Add(
const CalculationValue& other) const {
auto result_expression = CalculationExpressionOperationNode::CreateSimplified(
{GetOrCreateExpression(), other.GetOrCreateExpression()},
CalculationOperator::kAdd);
return CreateSimplified(result_expression, Length::ValueRange::kAll);
}
scoped_refptr<const CalculationValue> CalculationValue::Zoom(
double factor) const {
if (!IsExpression()) {
PixelsAndPercent result(Pixels() * factor, Percent(), HasExplicitPixels(),
HasExplicitPercent());
return Create(result, GetValueRange());
}
return CreateSimplified(data_.expression->Zoom(factor), GetValueRange());
}
bool CalculationValue::HasAuto() const {
return IsExpression() && data_.expression->HasAuto();
}
bool CalculationValue::HasContentOrIntrinsicSize() const {
return IsExpression() && data_.expression->HasContentOrIntrinsicSize();
}
bool CalculationValue::HasAutoOrContentOrIntrinsicSize() const {
return IsExpression() && data_.expression->HasAutoOrContentOrIntrinsicSize();
}
bool CalculationValue::HasPercent() const {
if (!IsExpression()) {
return HasExplicitPercent();
}
return data_.expression->HasPercent();
}
bool CalculationValue::HasPercentOrStretch() const {
if (!IsExpression()) {
return HasExplicitPercent();
}
return data_.expression->HasPercentOrStretch();
}
bool CalculationValue::HasStretch() const {
if (!IsExpression()) {
return false;
}
return data_.expression->HasStretch();
}
bool CalculationValue::HasMinContent() const {
if (!IsExpression()) {
return false;
}
return data_.expression->HasContentOrIntrinsicSize() &&
data_.expression->HasMinContent();
}
bool CalculationValue::HasMaxContent() const {
if (!IsExpression()) {
return false;
}
return data_.expression->HasContentOrIntrinsicSize() &&
data_.expression->HasMaxContent();
}
bool CalculationValue::HasFitContent() const {
if (!IsExpression()) {
return false;
}
return data_.expression->HasContentOrIntrinsicSize() &&
data_.expression->HasFitContent();
}
bool CalculationValue::HasOnlyFixedAndPercent() const {
if (!IsExpression()) {
return true;
}
return !data_.expression->HasAutoOrContentOrIntrinsicSize() &&
!data_.expression->HasStretch();
}
} // namespace blink
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