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LibWeb: Parse min() css math function

This commit is contained in:
stelar7 2023-05-26 11:21:49 +02:00 committed by Andreas Kling
parent 570e43a66a
commit 6a10821bfd
4 changed files with 155 additions and 2 deletions

View file

@ -24,6 +24,17 @@ static bool is_dimension(CalculatedStyleValue::ResolvedType type)
&& type != CalculatedStyleValue::ResolvedType::Percentage;
}
static double resolve_value(CalculatedStyleValue::CalculationResult::Value value, Layout::Node const* layout_node)
{
return value.visit(
[](Number const& number) { return number.value(); },
[](Angle const& angle) { return angle.to_degrees(); },
[](Frequency const& frequency) { return frequency.to_hertz(); },
[layout_node](Length const& length) { return length.to_px(*layout_node).value(); },
[](Percentage const& percentage) { return percentage.value(); },
[](Time const& time) { return time.to_seconds(); });
};
CalculationNode::CalculationNode(Type type)
: m_type(type)
{
@ -390,6 +401,84 @@ ErrorOr<void> InvertCalculationNode::dump(StringBuilder& builder, int indent) co
return {};
}
ErrorOr<NonnullOwnPtr<MinCalculationNode>> MinCalculationNode::create(Vector<NonnullOwnPtr<Web::CSS::CalculationNode>> values)
{
return adopt_nonnull_own_or_enomem(new (nothrow) MinCalculationNode(move(values)));
}
MinCalculationNode::MinCalculationNode(Vector<NonnullOwnPtr<CalculationNode>> values)
: CalculationNode(Type::Min)
, m_values(move(values))
{
}
MinCalculationNode::~MinCalculationNode() = default;
ErrorOr<String> MinCalculationNode::to_string() const
{
StringBuilder builder;
TRY(builder.try_append("min("sv));
for (size_t i = 0; i < m_values.size(); ++i) {
if (i != 0)
TRY(builder.try_append(", "sv));
TRY(builder.try_append(TRY(m_values[i]->to_string())));
}
TRY(builder.try_append(")"sv));
return builder.to_string();
}
Optional<CalculatedStyleValue::ResolvedType> MinCalculationNode::resolved_type() const
{
// NOTE: We check during parsing that all values have the same type.
return m_values[0]->resolved_type();
}
bool MinCalculationNode::contains_percentage() const
{
for (auto const& value : m_values) {
if (value->contains_percentage())
return true;
}
return false;
}
CalculatedStyleValue::CalculationResult MinCalculationNode::resolve(Layout::Node const* layout_node, CalculatedStyleValue::PercentageBasis const& percentage_basis) const
{
CalculatedStyleValue::CalculationResult smallest_node = m_values.first()->resolve(layout_node, percentage_basis);
auto smallest_value = resolve_value(smallest_node.value(), layout_node);
for (size_t i = 1; i < m_values.size(); i++) {
auto child_resolved = m_values[i]->resolve(layout_node, percentage_basis);
auto child_value = resolve_value(child_resolved.value(), layout_node);
if (child_value < smallest_value) {
smallest_value = child_value;
smallest_node = child_resolved;
}
}
return smallest_node;
}
ErrorOr<void> MinCalculationNode::for_each_child_node(Function<ErrorOr<void>(NonnullOwnPtr<CalculationNode>&)> const& callback)
{
for (auto& value : m_values) {
TRY(value->for_each_child_node(callback));
TRY(callback(value));
}
return {};
}
ErrorOr<void> MinCalculationNode::dump(StringBuilder& builder, int indent) const
{
TRY(builder.try_appendff("{: >{}}MIN:\n", "", indent));
for (auto const& value : m_values)
TRY(value->dump(builder, indent + 2));
return {};
}
void CalculatedStyleValue::CalculationResult::add(CalculationResult const& other, Layout::Node const* layout_node, PercentageBasis const& percentage_basis)
{
add_or_subtract_internal(SumOperation::Add, other, layout_node, percentage_basis);