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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 "Element.h"
#include "StyleLengthWrapper+CSSValueConversion.h"
namespace WebCore {
namespace Style {
// MARK: - Deprecated Conversions
std::optional<CSSToLengthConversionData> deprecatedLengthConversionCreateCSSToLengthConversionData(RefPtr<Element>);
template<LengthWrapperBaseDerived T> struct DeprecatedCSSValueConversion<T> {
auto operator()(const RefPtr<Element>& element, const CSSPrimitiveValue& primitiveValue) -> std::optional<T>
{
using namespace CSS::Literals;
auto convertLengthPercentage = [&] -> std::optional<T> {
auto conversionData = deprecatedLengthConversionCreateCSSToLengthConversionData(element);
if (!conversionData) {
if (primitiveValue.isCalculated())
return std::nullopt;
if (primitiveValue.isPx()) {
return T {
typename T::Fixed {
CSS::clampToRange<T::Fixed::range, float>(primitiveValue.resolveAsLengthNoConversionDataRequired(), minValueForCssLength, maxValueForCssLength),
},
primitiveValue.primitiveType() == CSSUnitType::CSS_QUIRKY_EM
};
}
if (primitiveValue.isPercentage()) {
return T {
typename T::Percentage {
CSS::clampToRange<T::Percentage::range, float>(primitiveValue.resolveAsPercentageNoConversionDataRequired()),
}
};
}
return std::nullopt;
}
if (primitiveValue.isLength()) {
return T {
typename T::Fixed {
CSS::clampToRange<T::Fixed::range, float>(primitiveValue.resolveAsLength(*conversionData), minValueForCssLength, maxValueForCssLength),
},
primitiveValue.primitiveType() == CSSUnitType::CSS_QUIRKY_EM
};
}
if (primitiveValue.isPercentage()) {
return T {
typename T::Percentage {
CSS::clampToRange<T::Percentage::range, float>(primitiveValue.resolveAsPercentage(*conversionData)),
}
};
}
if (primitiveValue.isCalculatedPercentageWithLength()) {
return T {
typename T::Calc {
primitiveValue.protectedCssCalcValue()->createCalculationValue(*conversionData, CSSCalcSymbolTable { })
}
};
}
return std::nullopt;
};
if constexpr (!T::Keywords::count)
return convertLengthPercentage();
else {
auto valueID = primitiveValue.valueID();
if (valueID == CSSValueInvalid)
return convertLengthPercentage();
constexpr auto keywordsTuple = T::Keywords::tuple;
auto result = std::apply([&](const auto& ...keyword) {
std::optional<T> result;
(CSSValueConversion<T>::processKeyword(keyword, valueID, result) || ...);
return result;
}, keywordsTuple);
return result;
}
}
auto operator()(const RefPtr<Element>& element, const CSSValue& value) -> std::optional<T>
{
using namespace CSS::Literals;
RefPtr primitiveValue = dynamicDowncast<CSSPrimitiveValue>(value);
if (!primitiveValue)
return std::nullopt;
return this->operator()(element, *primitiveValue);
}
};
} // namespace Style
} // namespace WebCore
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