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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 "Length.h"
#include "StylePrimitiveNumericTypes.h"
namespace WebCore {
namespace Style {
// Adaptor for a platform `WebCore::Length` acting as a `<length>`.
template<CSS::Range R = CSS::All> struct LengthAdaptor {
WebCore::Length value;
template<typename F> decltype(auto) switchOn(F&& functor) const
{
using Representation = Length<R>;
ASSERT(value.isFixed());
return functor(Representation { value.value() });
}
bool operator==(const LengthAdaptor<R>&) const = default;
};
// Adaptor for a platform `WebCore::Length` acting as a `<length-percentage>`.
template<CSS::Range R = CSS::All> struct LengthPercentageAdaptor {
WebCore::Length value;
template<typename F> decltype(auto) switchOn(F&& functor) const
{
using Representation = LengthPercentage<R>;
switch (value.type()) {
case WebCore::LengthType::Fixed: return functor(typename Representation::Dimension { value.value() });
case WebCore::LengthType::Percent: return functor(typename Representation::Percentage { value.value() });
case WebCore::LengthType::Calculated: return functor(typename Representation::Calc { value.calculationValue() });
default:
break;
}
RELEASE_ASSERT_NOT_REACHED();
}
bool operator==(const LengthPercentageAdaptor<R>&) const = default;
};
// Adaptor for a platform `WebCore::Length` acting as a `<length-percentage> | auto`.
template<CSS::Range R = CSS::All> struct LengthPercentageOrAutoAdaptor {
WebCore::Length value;
template<typename F> decltype(auto) switchOn(F&& functor) const
{
using Representation = LengthPercentage<R>;
switch (value.type()) {
case WebCore::LengthType::Fixed: return functor(typename Representation::Dimension { value.value() });
case WebCore::LengthType::Percent: return functor(typename Representation::Percentage { value.value() });
case WebCore::LengthType::Calculated: return functor(typename Representation::Calc { value.calculationValue() });
case WebCore::LengthType::Auto: return functor(CSS::Keyword::Auto { });
default:
break;
}
RELEASE_ASSERT_NOT_REACHED();
}
bool operator==(const LengthPercentageOrAutoAdaptor<R>&) const = default;
};
} // namespace Style
} // namespace WebCore
template<auto R> inline constexpr auto WebCore::TreatAsVariantLike<WebCore::Style::LengthAdaptor<R>> = true;
template<auto R> inline constexpr auto WebCore::TreatAsVariantLike<WebCore::Style::LengthPercentageAdaptor<R>> = true;
template<auto R> inline constexpr auto WebCore::TreatAsVariantLike<WebCore::Style::LengthPercentageOrAutoAdaptor<R>> = true;
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