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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/StylePrimitiveNumericTypes.h>
namespace WebCore {
class CSSValue;
class RenderStyle;
namespace Style {
// NOTE: the keyword value "infinity" is represented as the standard double value `std::numeric_limits<double>::infinity()`.
using SuperellipseFunction = FunctionNotation<CSSValueSuperellipse, Number<CSS::Nonnegative>>;
// https://drafts.csswg.org/css-borders-4/#typedef-corner-shape-value
struct CornerShapeValue {
SuperellipseFunction superellipse;
static constexpr CornerShapeValue round() { return { SuperellipseFunction { 2.0 } }; }
static constexpr CornerShapeValue scoop() { return { SuperellipseFunction { 0.5 } }; }
static constexpr CornerShapeValue bevel() { return { SuperellipseFunction { 1.0 } }; }
static constexpr CornerShapeValue notch() { return { SuperellipseFunction { 0.0 } }; }
static constexpr CornerShapeValue straight() { return { SuperellipseFunction { std::numeric_limits<double>::infinity() } }; }
static constexpr CornerShapeValue squircle() { return { SuperellipseFunction { 4.0 } }; }
template<typename F> decltype(auto) switchOn(F&& functor) const
{
if (*this == CornerShapeValue::round())
return functor(CSS::Keyword::Round { });
if (*this == CornerShapeValue::scoop())
return functor(CSS::Keyword::Scoop { });
if (*this == CornerShapeValue::bevel())
return functor(CSS::Keyword::Bevel { });
if (*this == CornerShapeValue::notch())
return functor(CSS::Keyword::Notch { });
if (*this == CornerShapeValue::straight())
return functor(CSS::Keyword::Straight { });
if (*this == CornerShapeValue::squircle())
return functor(CSS::Keyword::Squircle { });
return functor(superellipse);
}
bool operator==(const CornerShapeValue&) const = default;
};
// https://drafts.csswg.org/css-borders-4/#propdef-corner-shape
using CornerShape = MinimallySerializingSpaceSeparatedRectCorners<CornerShapeValue>;
// MARK: - Conversion
template<> struct CSSValueConversion<CornerShapeValue> { auto operator()(BuilderState&, const CSSValue&) -> CornerShapeValue; };
// MARK: - Blending
template<> struct Blending<CornerShapeValue> {
auto blend(const CornerShapeValue&, const CornerShapeValue&, const BlendingContext&) -> CornerShapeValue;
};
} // namespace Style
} // namespace WebCore
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::CornerShapeValue)
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