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LibWeb: Add LinearGradientStyleValue

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MacDue 2022-07-12 00:09:29 +01:00 • committed by Sam Atkins
parent 8603541e56
commit 259bb30c35
3 changed files with 188 additions and 1 deletions
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64
Userland/Libraries/LibWeb/CSS/StyleValue.h
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@ -58,6 +58,31 @@ enum class FlexBasis {
Auto,
};
enum class SideOrCorner {
Top,
Bottom,
Left,
Right,
TopLeft,
TopRight,
BottomLeft,
BottomRight
};
struct GradientColorStop {
Color color;
Optional<LengthPercentage> length;
};
struct GradientColorHint {
LengthPercentage value;
};
struct ColorStopListElement {
Optional<GradientColorHint> transition_hint;
GradientColorStop color_stop;
};
// FIXME: Find a better place for this helper.
inline Gfx::Painter::ScalingMode to_gfx_scaling_mode(CSS::ImageRendering css_value)
{
@ -99,6 +124,7 @@ public:
Initial,
Invalid,
Length,
LinearGradient,
ListStyle,
Numeric,
Overflow,
@ -112,7 +138,7 @@ public:
Transformation,
Unresolved,
Unset,
ValueList,
ValueList
};
Type type() const { return m_type; }
@ -136,6 +162,7 @@ public:
bool is_inherit() const { return type() == Type::Inherit; }
bool is_initial() const { return type() == Type::Initial; }
bool is_length() const { return type() == Type::Length; }
bool is_linear_gradient() const { return type() == Type::LinearGradient; }
bool is_list_style() const { return type() == Type::ListStyle; }
bool is_numeric() const { return type() == Type::Numeric; }
bool is_overflow() const { return type() == Type::Overflow; }
@ -172,6 +199,7 @@ public:
InheritStyleValue const& as_inherit() const;
InitialStyleValue const& as_initial() const;
LengthStyleValue const& as_length() const;
LinearGradientStyleValue const& as_linear_gradient() const;
ListStyleStyleValue const& as_list_style() const;
NumericStyleValue const& as_numeric() const;
OverflowStyleValue const& as_overflow() const;
@ -206,6 +234,7 @@ public:
InheritStyleValue& as_inherit() { return const_cast<InheritStyleValue&>(const_cast<StyleValue const&>(*this).as_inherit()); }
InitialStyleValue& as_initial() { return const_cast<InitialStyleValue&>(const_cast<StyleValue const&>(*this).as_initial()); }
LengthStyleValue& as_length() { return const_cast<LengthStyleValue&>(const_cast<StyleValue const&>(*this).as_length()); }
LinearGradientStyleValue& as_linear_gradient() { return const_cast<LinearGradientStyleValue&>(const_cast<StyleValue const&>(*this).as_linear_gradient()); }
ListStyleStyleValue& as_list_style() { return const_cast<ListStyleStyleValue&>(const_cast<StyleValue const&>(*this).as_list_style()); }
NumericStyleValue& as_numeric() { return const_cast<NumericStyleValue&>(const_cast<StyleValue const&>(*this).as_numeric()); }
OverflowStyleValue& as_overflow() { return const_cast<OverflowStyleValue&>(const_cast<StyleValue const&>(*this).as_overflow()); }
@ -887,6 +916,39 @@ private:
RefPtr<Gfx::Bitmap> m_bitmap;
};
class LinearGradientStyleValue final : public StyleValue {
public:
using GradientDirection = Variant<Angle, SideOrCorner>;
static NonnullRefPtr<LinearGradientStyleValue> create(GradientDirection direction, Vector<ColorStopListElement> color_stop_list)
{
VERIFY(color_stop_list.size() >= 2);
return adopt_ref(*new LinearGradientStyleValue(direction, move(color_stop_list)));
}
virtual String to_string() const override;
virtual ~LinearGradientStyleValue() override = default;
virtual bool equals(StyleValue const& other) const override;
Vector<ColorStopListElement> const& color_stop_list() const
{
return m_color_stop_list;
}
float angle(Gfx::FloatRect const& background_box) const;
private:
LinearGradientStyleValue(GradientDirection direction, Vector<ColorStopListElement> color_stop_list)
: StyleValue(Type::LinearGradient)
, m_direction(direction)
, m_color_stop_list(move(color_stop_list))
{
}
GradientDirection m_direction;
Vector<ColorStopListElement> m_color_stop_list;
};
class InheritStyleValue final : public StyleValue {
public:
static NonnullRefPtr<InheritStyleValue> the()