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LibWeb: Parse css math constants

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This commit is contained in:
stelar7 2023-05-26 21:24:31 +02:00 • committed by Sam Atkins
parent f8527e1cad
commit ba7af82c5c
Notes: sideshowbarker 2024-07-17 18:46:57 +09:00
3 changed files with 124 additions and 0 deletions
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65
Userland/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.cpp
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@ -777,6 +777,71 @@ ErrorOr<void> SignCalculationNode::dump(StringBuilder& builder, int indent) cons
return {};
}
ErrorOr<NonnullOwnPtr<ConstantCalculationNode>> ConstantCalculationNode::create(ConstantType constant)
{
return adopt_nonnull_own_or_enomem(new (nothrow) ConstantCalculationNode(constant));
}
ConstantCalculationNode::ConstantCalculationNode(ConstantType constant)
: CalculationNode(Type::Constant)
, m_constant(constant)
{
}
ConstantCalculationNode::~ConstantCalculationNode() = default;
ErrorOr<String> ConstantCalculationNode::to_string() const
{
switch (m_constant) {
case CalculationNode::ConstantType::E:
return "e"_short_string;
case CalculationNode::ConstantType::PI:
return "pi"_short_string;
case CalculationNode::ConstantType::Infinity:
return "infinity"_string;
case CalculationNode::ConstantType::MinusInfinity:
return "-infinity"_string;
case CalculationNode::ConstantType::NaN:
return "NaN"_string;
}
VERIFY_NOT_REACHED();
}
Optional<CalculatedStyleValue::ResolvedType> ConstantCalculationNode::resolved_type() const
{
return CalculatedStyleValue::ResolvedType::Number;
}
CalculatedStyleValue::CalculationResult ConstantCalculationNode::resolve([[maybe_unused]] Optional<Length::ResolutionContext const&> context, [[maybe_unused]] CalculatedStyleValue::PercentageBasis const& percentage_basis) const
{
switch (m_constant) {
case CalculationNode::ConstantType::E:
return { Number(Number::Type::Number, M_E) };
case CalculationNode::ConstantType::PI:
return { Number(Number::Type::Number, M_PI) };
// FIXME: We need to keep track of Infinity and NaN across all nodes, since they require special handling.
case CalculationNode::ConstantType::Infinity:
return { Number(Number::Type::Number, NumericLimits<float>::max()) };
case CalculationNode::ConstantType::MinusInfinity:
return { Number(Number::Type::Number, NumericLimits<float>::lowest()) };
case CalculationNode::ConstantType::NaN:
return { Number(Number::Type::Number, NAN) };
}
VERIFY_NOT_REACHED();
}
ErrorOr<void> ConstantCalculationNode::for_each_child_node([[maybe_unused]] Function<ErrorOr<void>(NonnullOwnPtr<CalculationNode>&)> const& callback)
{
return {};
}
ErrorOr<void> ConstantCalculationNode::dump(StringBuilder& builder, int indent) const
{
TRY(builder.try_appendff("{: >{}}CONSTANT: {}\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);