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/*
* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "Angle.h"
#include <AK/Math.h>
#include <LibWeb/CSS/StyleValue.h>
namespace Web::CSS {
Angle::Angle(int value, Type type)
: m_type(type)
, m_value(value)
{
}
Angle::Angle(float value, Type type)
: m_type(type)
, m_value(value)
{
}
Angle Angle::make_calculated(NonnullRefPtr<CalculatedStyleValue> calculated_style_value)
{
Angle angle { 0, Type::Calculated };
angle.m_calculated_style = move(calculated_style_value);
return angle;
}
Angle Angle::make_degrees(float value)
{
return { value, Type::Deg };
}
Angle Angle::percentage_of(Percentage const& percentage) const
{
VERIFY(!is_calculated());
return Angle { percentage.as_fraction() * m_value, m_type };
}
ErrorOr<String> Angle::to_string() const
{
if (is_calculated())
return m_calculated_style->to_string();
return String::formatted("{}{}", m_value, unit_name());
}
float Angle::to_degrees() const
{
switch (m_type) {
case Type::Calculated:
return m_calculated_style->resolve_angle()->to_degrees();
case Type::Deg:
return m_value;
case Type::Grad:
return m_value * (360.0f / 400.0f);
case Type::Rad:
return m_value * (180.0f / AK::Pi<float>);
case Type::Turn:
return m_value * 360.0f;
}
VERIFY_NOT_REACHED();
}
StringView Angle::unit_name() const
{
switch (m_type) {
case Type::Calculated:
return "calculated"sv;
case Type::Deg:
return "deg"sv;
case Type::Grad:
return "grad"sv;
case Type::Rad:
return "rad"sv;
case Type::Turn:
return "turn"sv;
}
VERIFY_NOT_REACHED();
}
Optional<Angle::Type> Angle::unit_from_name(StringView name)
{
if (name.equals_ignoring_case("deg"sv)) {
return Type::Deg;
} else if (name.equals_ignoring_case("grad"sv)) {
return Type::Grad;
} else if (name.equals_ignoring_case("rad"sv)) {
return Type::Rad;
} else if (name.equals_ignoring_case("turn"sv)) {
return Type::Turn;
}
return {};
}
NonnullRefPtr<CalculatedStyleValue> Angle::calculated_style_value() const
{
VERIFY(!m_calculated_style.is_null());
return *m_calculated_style;
}
}
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