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LibWeb: Implement CSS abs()

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stelar7 2023-05-27 22:56:41 +02:00 • committed by Sam Atkins
parent 85f822381f
commit 79fc4c8a82
4 changed files with 118 additions and 0 deletions
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79
Userland/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.cpp
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@ -35,6 +35,28 @@ static double resolve_value(CalculatedStyleValue::CalculationResult::Value value
[](Time const& time) { return time.to_seconds(); });
};
static CalculatedStyleValue::CalculationResult to_resolved_type(CalculatedStyleValue::ResolvedType type, double value)
{
switch (type) {
case CalculatedStyleValue::ResolvedType::Integer:
return { Number(Number::Type::Integer, value) };
case CalculatedStyleValue::ResolvedType::Number:
return { Number(Number::Type::Number, value) };
case CalculatedStyleValue::ResolvedType::Angle:
return { Angle::make_degrees(value) };
case CalculatedStyleValue::ResolvedType::Frequency:
return { Frequency::make_hertz(value) };
case CalculatedStyleValue::ResolvedType::Length:
return { Length::make_px(value) };
case CalculatedStyleValue::ResolvedType::Percentage:
return { Percentage(value) };
case CalculatedStyleValue::ResolvedType::Time:
return { Time::make_seconds(value) };
}
VERIFY_NOT_REACHED();
};
CalculationNode::CalculationNode(Type type)
: m_type(type)
{
@ -639,6 +661,63 @@ ErrorOr<void> ClampCalculationNode::dump(StringBuilder& builder, int indent) con
return {};
}
ErrorOr<NonnullOwnPtr<AbsCalculationNode>> AbsCalculationNode::create(NonnullOwnPtr<CalculationNode> value)
{
return adopt_nonnull_own_or_enomem(new (nothrow) AbsCalculationNode(move(value)));
}
AbsCalculationNode::AbsCalculationNode(NonnullOwnPtr<CalculationNode> value)
: CalculationNode(Type::Abs)
, m_value(move(value))
{
}
AbsCalculationNode::~AbsCalculationNode() = default;
ErrorOr<String> AbsCalculationNode::to_string() const
{
StringBuilder builder;
builder.append("abs("sv);
builder.append(TRY(m_value->to_string()));
builder.append(")"sv);
return builder.to_string();
}
Optional<CalculatedStyleValue::ResolvedType> AbsCalculationNode::resolved_type() const
{
return m_value->resolved_type();
}
bool AbsCalculationNode::contains_percentage() const
{
return m_value->contains_percentage();
}
CalculatedStyleValue::CalculationResult AbsCalculationNode::resolve(Optional<Length::ResolutionContext const&> context, CalculatedStyleValue::PercentageBasis const& percentage_basis) const
{
auto resolved_type = m_value->resolved_type().value();
auto node_a = m_value->resolve(context, percentage_basis);
auto node_a_value = resolve_value(node_a.value(), context);
if (node_a_value < 0)
return to_resolved_type(resolved_type, -node_a_value);
return node_a;
}
ErrorOr<void> AbsCalculationNode::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> AbsCalculationNode::dump(StringBuilder& builder, int indent) const
{
TRY(builder.try_appendff("{: >{}}ABS: {}\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);