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LibWeb: Implement CSS sin()

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This commit is contained in:
stelar7 2023-05-27 23:50:33 +02:00 • committed by Sam Atkins
parent ba7af82c5c
commit c73f476915
6 changed files with 125 additions and 0 deletions
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62
Userland/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.cpp
View file

@ -24,6 +24,14 @@ static bool is_dimension(CalculatedStyleValue::ResolvedType type)
&& type != CalculatedStyleValue::ResolvedType::Percentage;
}
static double resolve_value_radians(CalculatedStyleValue::CalculationResult::Value value)
{
return value.visit(
[](Number const& number) { return number.value(); },
[](Angle const& angle) { return angle.to_radians(); },
[](auto const&) { VERIFY_NOT_REACHED(); return 0.0; });
};
static double resolve_value(CalculatedStyleValue::CalculationResult::Value value, Optional<Length::ResolutionContext const&> context)
{
return value.visit(
@ -842,6 +850,60 @@ ErrorOr<void> ConstantCalculationNode::dump(StringBuilder& builder, int indent)
return {};
}
ErrorOr<NonnullOwnPtr<SinCalculationNode>> SinCalculationNode::create(NonnullOwnPtr<CalculationNode> value)
{
return adopt_nonnull_own_or_enomem(new (nothrow) SinCalculationNode(move(value)));
}
SinCalculationNode::SinCalculationNode(NonnullOwnPtr<CalculationNode> value)
: CalculationNode(Type::Sin)
, m_value(move(value))
{
}
SinCalculationNode::~SinCalculationNode() = default;
ErrorOr<String> SinCalculationNode::to_string() const
{
StringBuilder builder;
builder.append("sin("sv);
builder.append(TRY(m_value->to_string()));
builder.append(")"sv);
return builder.to_string();
}
Optional<CalculatedStyleValue::ResolvedType> SinCalculationNode::resolved_type() const
{
return CalculatedStyleValue::ResolvedType::Number;
}
bool SinCalculationNode::contains_percentage() const
{
return m_value->contains_percentage();
}
CalculatedStyleValue::CalculationResult SinCalculationNode::resolve(Optional<Length::ResolutionContext const&> context, CalculatedStyleValue::PercentageBasis const& percentage_basis) const
{
auto node_a = m_value->resolve(context, percentage_basis);
auto node_a_value = resolve_value_radians(node_a.value());
auto result = sin(node_a_value);
return { Number(Number::Type::Number, result) };
}
ErrorOr<void> SinCalculationNode::for_each_child_node(Function<ErrorOr<void>(NonnullOwnPtr<CalculationNode>&)> const& callback)
{
TRY(m_value->for_each_child_node(callback));
TRY(callback(m_value));
return {};
}
ErrorOr<void> SinCalculationNode::dump(StringBuilder& builder, int indent) const
{
TRY(builder.try_appendff("{: >{}}SIN: {}\n", "", indent, TRY(to_string())));
return {};
}
void CalculatedStyleValue::CalculationResult::add(CalculationResult const& other, Optional<Length::ResolutionContext const&> context, PercentageBasis const& percentage_basis)
{
add_or_subtract_internal(SumOperation::Add, other, context, percentage_basis);

28
Userland/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.h
View file

@ -152,6 +152,16 @@ public:
// https://drafts.csswg.org/css-values-4/#calc-constants
Constant,
// Trigonometric functions, a sub-type of operator node
// https://drafts.csswg.org/css-values-4/#trig-funcs
Sin,
Cos,
Tan,
Asin,
Acos,
Atan,
Atan2,
// This only exists during parsing.
Unparsed,
};
@ -386,4 +396,22 @@ private:
CalculationNode::ConstantType m_constant;
};
class SinCalculationNode final : public CalculationNode {
public:
static ErrorOr<NonnullOwnPtr<SinCalculationNode>> create(NonnullOwnPtr<CalculationNode>);
~SinCalculationNode();
virtual ErrorOr<String> to_string() const override;
virtual Optional<CalculatedStyleValue::ResolvedType> resolved_type() const override;
virtual bool contains_percentage() const override;
virtual CalculatedStyleValue::CalculationResult resolve(Optional<Length::ResolutionContext const&>, CalculatedStyleValue::PercentageBasis const&) const override;
virtual ErrorOr<void> for_each_child_node(Function<ErrorOr<void>(NonnullOwnPtr<CalculationNode>&)> const&) override;
virtual ErrorOr<void> dump(StringBuilder&, int indent) const override;
private:
SinCalculationNode(NonnullOwnPtr<CalculationNode>);
NonnullOwnPtr<CalculationNode> m_value;
};
}