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/*
* Copyright (C) 2024-2025 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 "CSSPrimitiveNumericTypes.h"
namespace WebCore {
namespace CSS {
// MARK: Two Component Types
struct TwoComponentPositionHorizontal {
Variant<Keyword::Left, Keyword::Right, Keyword::Center, Keyword::XStart, Keyword::XEnd, LengthPercentage<>> offset;
bool operator==(const TwoComponentPositionHorizontal&) const = default;
};
DEFINE_TYPE_WRAPPER_GET(TwoComponentPositionHorizontal, offset);
struct TwoComponentPositionVertical {
Variant<Keyword::Top, Keyword::Bottom, Keyword::Center, Keyword::YStart, Keyword::YEnd, LengthPercentage<>> offset;
bool operator==(const TwoComponentPositionVertical&) const = default;
};
DEFINE_TYPE_WRAPPER_GET(TwoComponentPositionVertical, offset);
// MARK: Three Component Types
struct ThreeComponentPositionHorizontal {
Variant<Keyword::Left, Keyword::Right, Keyword::Center, Keyword::XStart, Keyword::XEnd> offset;
bool operator==(const ThreeComponentPositionHorizontal&) const = default;
};
DEFINE_TYPE_WRAPPER_GET(ThreeComponentPositionHorizontal, offset);
struct ThreeComponentPositionVertical {
Variant<Keyword::Top, Keyword::Bottom, Keyword::Center, Keyword::YStart, Keyword::YEnd> offset;
bool operator==(const ThreeComponentPositionVertical&) const = default;
};
DEFINE_TYPE_WRAPPER_GET(ThreeComponentPositionVertical, offset);
// MARK: Four Component Types
struct FourComponentPositionHorizontal {
SpaceSeparatedTuple<Variant<Keyword::Left, Keyword::Right, Keyword::XStart, Keyword::XEnd>, LengthPercentage<>> offset;
bool operator==(const FourComponentPositionHorizontal&) const = default;
};
DEFINE_TYPE_WRAPPER_GET(FourComponentPositionHorizontal, offset);
struct FourComponentPositionVertical {
SpaceSeparatedTuple<Variant<Keyword::Top, Keyword::Bottom, Keyword::YStart, Keyword::YEnd>, LengthPercentage<>> offset;
bool operator==(const FourComponentPositionVertical&) const = default;
};
DEFINE_TYPE_WRAPPER_GET(FourComponentPositionVertical, offset);
using TwoComponentPositionHorizontalVertical = SpaceSeparatedTuple<TwoComponentPositionHorizontal, TwoComponentPositionVertical>;
using ThreeComponentPositionHorizontalVerticalLengthFirst = SpaceSeparatedTuple<FourComponentPositionHorizontal, ThreeComponentPositionVertical>;
using ThreeComponentPositionHorizontalVerticalLengthSecond = SpaceSeparatedTuple<ThreeComponentPositionHorizontal, FourComponentPositionVertical>;
using FourComponentPositionHorizontalVertical = SpaceSeparatedTuple<FourComponentPositionHorizontal, FourComponentPositionVertical>;
struct Position {
using Kind = Variant<
TwoComponentPositionHorizontalVertical,
ThreeComponentPositionHorizontalVerticalLengthFirst,
ThreeComponentPositionHorizontalVerticalLengthSecond,
FourComponentPositionHorizontalVertical
>;
template<typename T>
Position(T&& value)
: value { std::forward<T>(value) }
{
}
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
return WTF::switchOn(value, std::forward<F>(f)...);
}
bool operator==(const Position&) const = default;
Kind value;
};
DEFINE_TYPE_WRAPPER_GET(Position, value);
struct PositionX {
using Kind = Variant<
TwoComponentPositionHorizontal,
FourComponentPositionHorizontal
>;
template<typename T>
PositionX(T&& value)
: value { std::forward<T>(value) }
{
}
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
return WTF::switchOn(value, std::forward<F>(f)...);
}
bool operator==(const PositionX&) const = default;
Kind value;
};
DEFINE_TYPE_WRAPPER_GET(PositionX, value);
struct PositionY {
using Kind = Variant<
TwoComponentPositionVertical,
FourComponentPositionVertical
>;
template<typename T>
PositionY(T&& value)
: value { std::forward<T>(value) }
{
}
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
return WTF::switchOn(value, std::forward<F>(f)...);
}
bool operator==(const PositionY&) const = default;
Kind value;
};
DEFINE_TYPE_WRAPPER_GET(PositionY, value);
bool isCenterPosition(const Position&);
std::pair<CSS::PositionX, CSS::PositionY> split(CSS::Position&&);
} // namespace CSS
} // namespace WebCore
DEFINE_TUPLE_LIKE_CONFORMANCE(WebCore::CSS::TwoComponentPositionHorizontal, 1)
DEFINE_TUPLE_LIKE_CONFORMANCE(WebCore::CSS::TwoComponentPositionVertical, 1)
DEFINE_TUPLE_LIKE_CONFORMANCE(WebCore::CSS::ThreeComponentPositionHorizontal, 1)
DEFINE_TUPLE_LIKE_CONFORMANCE(WebCore::CSS::ThreeComponentPositionVertical, 1)
DEFINE_TUPLE_LIKE_CONFORMANCE(WebCore::CSS::FourComponentPositionHorizontal, 1)
DEFINE_TUPLE_LIKE_CONFORMANCE(WebCore::CSS::FourComponentPositionVertical, 1)
DEFINE_TUPLE_LIKE_CONFORMANCE(WebCore::CSS::Position, 1)
DEFINE_TUPLE_LIKE_CONFORMANCE(WebCore::CSS::PositionX, 1)
DEFINE_TUPLE_LIKE_CONFORMANCE(WebCore::CSS::PositionY, 1)
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