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/*
* Copyright (C) 2025 Samuel Weinig <sam@webkit.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <WebCore/RenderStyleConstants.h>
#include <WebCore/StyleBasicShape.h>
#include <WebCore/StyleImageWrapper.h>
#include <WebCore/StyleValueTypes.h>
namespace WebCore {
namespace Style {
// <'shape-outside'> = none | [ <basic-shape> || <shape-box> ] | <image>
// https://www.w3.org/TR/css-shapes/#propdef-shape-outside
struct ShapeOutside {
using Shape = BasicShape;
using ShapeBox = CSSBoxType;
struct ShapeAndShapeBox {
Shape shape;
ShapeBox box;
bool operator==(const ShapeAndShapeBox&) const = default;
};
struct Image {
ImageWrapper image;
bool isValid() const;
bool operator==(const Image&) const = default;
};
ShapeOutside(CSS::Keyword::None) { }
ShapeOutside(Shape&& value) : m_value { Value::create(WTFMove(value)) } { }
ShapeOutside(ShapeBox&& value) : m_value { Value::create(WTFMove(value)) } { }
ShapeOutside(ShapeAndShapeBox&& value) : m_value { Value::create(WTFMove(value)) } { }
ShapeOutside(Image&& value) : m_value { Value::create(WTFMove(value)) } { }
bool isNone() const { return !m_value; }
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
auto visitor = WTF::makeVisitor(std::forward<F>(f)...);
if (isNone())
return visitor(CSS::Keyword::None { });
return WTF::switchOn(m_value->value,
[&](const Shape& shape) {
return visitor(shape);
},
[&](const ShapeBox& box) {
return visitor(box);
},
[&](const ShapeAndShapeBox& shapeAndShapeBox) {
return visitor(shapeAndShapeBox);
},
[&](const Image& image) {
return visitor(image);
}
);
}
const BasicShape* shape() const { RefPtr value = m_value; return value ? value->shape() : nullptr; }
CSSBoxType effectiveCSSBox() const { RefPtr value = m_value; return value ? value->effectiveCSSBox() : CSSBoxType::BoxMissing; }
RefPtr<StyleImage> image() const { RefPtr value = m_value; return value ? value->image() : nullptr; }
bool operator==(const ShapeOutside& other) const
{
return arePointingToEqualData(m_value, other.m_value);
}
private:
friend struct Blending<ShapeOutside>;
class Value : public RefCounted<Value> {
public:
using Kind = Variant<Shape, ShapeBox, ShapeAndShapeBox, Image>;
static Ref<Value> create(Kind&& value)
{
return adoptRef(*new Value(WTFMove(value)));
}
explicit Value(Kind&& value)
: value { WTFMove(value) }
{
}
inline const BasicShape* shape() const;
inline CSSBoxType effectiveCSSBox() const;
inline RefPtr<StyleImage> image() const;
bool operator==(const Value& other) const
{
return value == other.value;
}
Kind value;
};
RefPtr<Value> m_value { };
};
DEFINE_TYPE_WRAPPER_GET(ShapeOutside::Image, image);
template<size_t I> const auto& get(const ShapeOutside::ShapeAndShapeBox& value)
{
if constexpr (!I)
return value.shape;
else if constexpr (I == 1)
return value.box;
}
inline const BasicShape* ShapeOutside::Value::shape() const
{
return WTF::switchOn(value,
[](const ShapeOutside::Shape& shape) -> const BasicShape* { return &shape; },
[](const ShapeOutside::ShapeBox&) -> const BasicShape* { return nullptr; },
[](const ShapeOutside::ShapeAndShapeBox& shapeAndShapeBox) -> const BasicShape* { return &shapeAndShapeBox.shape; },
[](const ShapeOutside::Image&) -> const BasicShape* { return nullptr; }
);
}
inline RefPtr<StyleImage> ShapeOutside::Value::image() const
{
return WTF::switchOn(value,
[](const ShapeOutside::Shape&) -> RefPtr<StyleImage> { return nullptr; },
[](const ShapeOutside::ShapeBox&) -> RefPtr<StyleImage> { return nullptr; },
[](const ShapeOutside::ShapeAndShapeBox&) -> RefPtr<StyleImage> { return nullptr; },
[](const ShapeOutside::Image& image) -> RefPtr<StyleImage> { return image.image.value.ptr(); }
);
}
CSSBoxType ShapeOutside::Value::effectiveCSSBox() const
{
return WTF::switchOn(value,
[](const ShapeOutside::Shape&) { return CSSBoxType::MarginBox; },
[](const ShapeOutside::ShapeBox& box) { return box == CSSBoxType::BoxMissing ? CSSBoxType::MarginBox : box; },
[](const ShapeOutside::ShapeAndShapeBox& shapeAndShapeBox) { return shapeAndShapeBox.box == CSSBoxType::BoxMissing ? CSSBoxType::MarginBox : shapeAndShapeBox.box; },
[](const ShapeOutside::Image&) { return CSSBoxType::ContentBox; }
);
}
// MARK: - Conversion
template<> struct CSSValueConversion<ShapeOutside> { auto operator()(BuilderState&, const CSSValue&) -> ShapeOutside; };
// MARK: - Blending
template<> struct Blending<ShapeOutside> {
auto canBlend(const ShapeOutside&, const ShapeOutside&) -> bool;
auto blend(const ShapeOutside&, const ShapeOutside&, const BlendingContext&) -> ShapeOutside;
};
} // namespace Style
} // namespace WebCore
DEFINE_SPACE_SEPARATED_TUPLE_LIKE_CONFORMANCE(WebCore::Style::ShapeOutside::ShapeAndShapeBox, 2)
DEFINE_TUPLE_LIKE_CONFORMANCE_FOR_TYPE_WRAPPER(WebCore::Style::ShapeOutside::Image);
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::ShapeOutside)
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