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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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5
Userland/Libraries/LibWeb/CSS/Angle.cpp
View file

@ -52,6 +52,11 @@ double Angle::to_degrees() const
VERIFY_NOT_REACHED();
}
double Angle::to_radians() const
{
return to_degrees() * (AK::Pi<double> / 180.0);
}
StringView Angle::unit_name() const
{
switch (m_type) {

2
Userland/Libraries/LibWeb/CSS/Angle.h
View file

@ -28,7 +28,9 @@ public:
Angle percentage_of(Percentage const&) const;
ErrorOr<String> to_string() const;
double to_degrees() const;
double to_radians() const;
Type type() const { return m_type; }
double raw_value() const { return m_value; }

27
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
View file

@ -3594,6 +3594,30 @@ ErrorOr<OwnPtr<CalculationNode>> Parser::parse_sign_function(Function const& fun
return TRY(SignCalculationNode::create(calculation_node.release_nonnull()));
}
ErrorOr<OwnPtr<CalculationNode>> Parser::parse_sin_function(Function const& function)
{
auto calculation_node = TRY(parse_a_calculation(function.values()));
if (!calculation_node) {
dbgln_if(CSS_PARSER_DEBUG, "sin() parameter must be a valid calculation"sv);
return nullptr;
}
auto maybe_parameter_type = calculation_node->resolved_type();
if (!maybe_parameter_type.has_value()) {
dbgln_if(CSS_PARSER_DEBUG, "Failed to resolve type for sin() parameter"sv);
return nullptr;
}
auto resolved_type = maybe_parameter_type.value();
if (resolved_type != CalculatedStyleValue::ResolvedType::Number && resolved_type != CalculatedStyleValue::ResolvedType::Angle) {
dbgln_if(CSS_PARSER_DEBUG, "sin() parameter must be a number or angle"sv);
return nullptr;
}
return TRY(SinCalculationNode::create(calculation_node.release_nonnull()));
}
ErrorOr<RefPtr<StyleValue>> Parser::parse_dynamic_value(ComponentValue const& component_value)
{
if (component_value.is_function()) {
@ -3638,6 +3662,9 @@ ErrorOr<OwnPtr<CalculationNode>> Parser::parse_a_calc_function_node(Function con
if (function.name().equals_ignoring_ascii_case("sign"sv))
return TRY(parse_sign_function(function));
if (function.name().equals_ignoring_ascii_case("sin"sv))
return TRY(parse_sin_function(function));
dbgln_if(CSS_PARSER_DEBUG, "We didn't implement `{}` function yet", function.name());
return nullptr;
}

1
Userland/Libraries/LibWeb/CSS/Parser/Parser.h
View file

@ -295,6 +295,7 @@ private:
ErrorOr<OwnPtr<CalculationNode>> parse_clamp_function(Function const&);
ErrorOr<OwnPtr<CalculationNode>> parse_abs_function(Function const&);
ErrorOr<OwnPtr<CalculationNode>> parse_sign_function(Function const&);
ErrorOr<OwnPtr<CalculationNode>> parse_sin_function(Function const&);
ErrorOr<RefPtr<StyleValue>> parse_dimension_value(ComponentValue const&);
ErrorOr<RefPtr<StyleValue>> parse_integer_value(TokenStream<ComponentValue>&);
ErrorOr<RefPtr<StyleValue>> parse_number_value(TokenStream<ComponentValue>&);

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;
};
}