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LibWeb: Parse max()
css math function
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4 changed files with 139 additions and 0 deletions
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@ -479,6 +479,84 @@ ErrorOr<void> MinCalculationNode::dump(StringBuilder& builder, int indent) const
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return {};
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}
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ErrorOr<NonnullOwnPtr<MaxCalculationNode>> MaxCalculationNode::create(Vector<NonnullOwnPtr<Web::CSS::CalculationNode>> values)
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{
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return adopt_nonnull_own_or_enomem(new (nothrow) MaxCalculationNode(move(values)));
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}
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MaxCalculationNode::MaxCalculationNode(Vector<NonnullOwnPtr<CalculationNode>> values)
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: CalculationNode(Type::Max)
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, m_values(move(values))
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{
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}
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MaxCalculationNode::~MaxCalculationNode() = default;
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ErrorOr<String> MaxCalculationNode::to_string() const
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{
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StringBuilder builder;
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TRY(builder.try_append("max("sv));
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for (size_t i = 0; i < m_values.size(); ++i) {
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if (i != 0)
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TRY(builder.try_append(", "sv));
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TRY(builder.try_append(TRY(m_values[i]->to_string())));
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}
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TRY(builder.try_append(")"sv));
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return builder.to_string();
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}
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Optional<CalculatedStyleValue::ResolvedType> MaxCalculationNode::resolved_type() const
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{
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// NOTE: We check during parsing that all values have the same type.
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return m_values[0]->resolved_type();
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}
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bool MaxCalculationNode::contains_percentage() const
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{
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for (auto const& value : m_values) {
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if (value->contains_percentage())
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return true;
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}
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return false;
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}
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CalculatedStyleValue::CalculationResult MaxCalculationNode::resolve(Layout::Node const* layout_node, CalculatedStyleValue::PercentageBasis const& percentage_basis) const
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{
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CalculatedStyleValue::CalculationResult largest_node = m_values.first()->resolve(layout_node, percentage_basis);
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auto largest_value = resolve_value(largest_node.value(), layout_node);
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for (size_t i = 1; i < m_values.size(); i++) {
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auto child_resolved = m_values[i]->resolve(layout_node, percentage_basis);
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auto child_value = resolve_value(child_resolved.value(), layout_node);
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if (child_value > largest_value) {
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largest_value = child_value;
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largest_node = child_resolved;
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}
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}
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return largest_node;
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}
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ErrorOr<void> MaxCalculationNode::for_each_child_node(Function<ErrorOr<void>(NonnullOwnPtr<CalculationNode>&)> const& callback)
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{
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for (auto& value : m_values) {
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TRY(value->for_each_child_node(callback));
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TRY(callback(value));
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}
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return {};
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}
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ErrorOr<void> MaxCalculationNode::dump(StringBuilder& builder, int indent) const
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{
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TRY(builder.try_appendff("{: >{}}MAX:\n", "", indent));
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for (auto const& value : m_values)
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TRY(value->dump(builder, indent + 2));
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return {};
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}
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void CalculatedStyleValue::CalculationResult::add(CalculationResult const& other, Layout::Node const* layout_node, PercentageBasis const& percentage_basis)
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{
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add_or_subtract_internal(SumOperation::Add, other, layout_node, percentage_basis);
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