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LibWeb: Implement CSS Angle class

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This corresponds to `<angle>` in the grammar.
This commit is contained in:
Sam Atkins 2022-02-21 17:43:30 +00:00 • committed by Andreas Kling
parent a07fed4e53
commit 355d1936f2
9 changed files with 293 additions and 31 deletions
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47
Userland/Libraries/LibWeb/CSS/StyleValue.h
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@ -22,6 +22,7 @@
#include <AK/WeakPtr.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Color.h>
#include <LibWeb/CSS/Angle.h>
#include <LibWeb/CSS/Display.h>
#include <LibWeb/CSS/Length.h>
#include <LibWeb/CSS/Parser/StyleComponentValueRule.h>
@ -283,6 +284,7 @@ public:
virtual ~StyleValue();
enum class Type {
Angle,
Background,
BackgroundRepeat,
BackgroundSize,
@ -316,6 +318,7 @@ public:
Type type() const { return m_type; }
bool is_angle() const { return type() == Type::Angle; }
bool is_background() const { return type() == Type::Background; }
bool is_background_repeat() const { return type() == Type::BackgroundRepeat; }
bool is_background_size() const { return type() == Type::BackgroundSize; }
@ -346,6 +349,7 @@ public:
bool is_builtin() const { return is_inherit() || is_initial() || is_unset(); }
AngleStyleValue const& as_angle() const;
BackgroundStyleValue const& as_background() const;
BackgroundRepeatStyleValue const& as_background_repeat() const;
BackgroundSizeStyleValue const& as_background_size() const;
@ -374,6 +378,7 @@ public:
UnsetStyleValue const& as_unset() const;
StyleValueList const& as_value_list() const;
AngleStyleValue& as_angle() { return const_cast<AngleStyleValue&>(const_cast<StyleValue const&>(*this).as_angle()); }
BackgroundStyleValue& as_background() { return const_cast<BackgroundStyleValue&>(const_cast<StyleValue const&>(*this).as_background()); }
BackgroundRepeatStyleValue& as_background_repeat() { return const_cast<BackgroundRepeatStyleValue&>(const_cast<StyleValue const&>(*this).as_background_repeat()); }
BackgroundSizeStyleValue& as_background_size() { return const_cast<BackgroundSizeStyleValue&>(const_cast<StyleValue const&>(*this).as_background_size()); }
@ -435,6 +440,35 @@ private:
Type m_type { Type::Invalid };
};
class AngleStyleValue : public StyleValue {
public:
static NonnullRefPtr<AngleStyleValue> create(Angle angle)
{
return adopt_ref(*new AngleStyleValue(move(angle)));
}
virtual ~AngleStyleValue() override { }
Angle const& angle() const { return m_angle; }
virtual String to_string() const override { return m_angle.to_string(); }
virtual bool equals(StyleValue const& other) const override
{
if (type() != other.type())
return false;
return m_angle == static_cast<AngleStyleValue const&>(other).m_angle;
}
private:
explicit AngleStyleValue(Angle angle)
: StyleValue(Type::Angle)
, m_angle(move(angle))
{
}
Angle m_angle;
};
class BackgroundStyleValue final : public StyleValue {
public:
static NonnullRefPtr<BackgroundStyleValue> create(
@ -696,11 +730,11 @@ public:
float value;
};
using PercentageBasis = Variant<Empty, Length>;
using PercentageBasis = Variant<Empty, Angle, Length>;
class CalculationResult {
public:
CalculationResult(Variant<Number, Length, Percentage> value)
CalculationResult(Variant<Number, Angle, Length, Percentage> value)
: m_value(move(value))
{
}
@ -709,11 +743,11 @@ public:
void multiply_by(CalculationResult const& other, Layout::Node const*);
void divide_by(CalculationResult const& other, Layout::Node const*);
Variant<Number, Length, Percentage> const& value() const { return m_value; }
Variant<Number, Angle, Length, Percentage> const& value() const { return m_value; }
private:
void add_or_subtract_internal(SumOperation op, CalculationResult const& other, Layout::Node const*, PercentageBasis const& percentage_basis);
Variant<Number, Length, Percentage> m_value;
Variant<Number, Angle, Length, Percentage> m_value;
};
struct CalcSum;
@ -733,7 +767,7 @@ public:
};
struct CalcValue {
Variant<Number, Length, Percentage, NonnullOwnPtr<CalcSum>> value;
Variant<Number, Angle, Length, Percentage, NonnullOwnPtr<CalcSum>> value;
String to_string() const;
Optional<ResolvedType> resolved_type() const;
CalculationResult resolve(Layout::Node const*, PercentageBasis const& percentage_basis) const;
@ -836,6 +870,9 @@ public:
String to_string() const override;
ResolvedType resolved_type() const { return m_resolved_type; }
NonnullOwnPtr<CalcSum> const& expression() const { return m_expression; }
Optional<Angle> resolve_angle() const;
Optional<AnglePercentage> resolve_angle_percentage(Angle const& percentage_basis) const;
Optional<Length> resolve_length(Layout::Node const& layout_node) const;
Optional<LengthPercentage> resolve_length_percentage(Layout::Node const&, Length const& percentage_basis) const;
Optional<Percentage> resolve_percentage() const;