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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,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* 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/StyleValueTypes.h>
#include <WebCore/TextFlags.h>
namespace WebCore {
namespace Style {
// <'font-variant-numeric'> = normal | [ <numeric-figure-values> || <numeric-spacing-values> || <numeric-fraction-values> || ordinal || slashed-zero ]
// https://drafts.csswg.org/css-fonts-4/#propdef-font-variant-numeric
struct FontVariantNumeric {
using Platform = WebCore::FontVariantNumericValues;
constexpr FontVariantNumeric(CSS::Keyword::Normal)
: m_platform { }
{
}
constexpr FontVariantNumeric(Platform value)
: m_platform { value }
{
}
constexpr Platform platform() const { return m_platform; }
constexpr bool isNormal() const
{
return m_platform.figure == FontVariantNumericFigure::Normal
&& m_platform.spacing == FontVariantNumericSpacing::Normal
&& m_platform.fraction == FontVariantNumericFraction::Normal
&& m_platform.ordinal == FontVariantNumericOrdinal::Normal
&& m_platform.slashedZero == FontVariantNumericSlashedZero::Normal;
}
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
auto visitor = WTF::makeVisitor(std::forward<F>(f)...);
if (isNormal())
return visitor(CSS::Keyword::Normal { });
auto figureValue = [](auto value) -> std::optional<Variant<CSS::Keyword::LiningNums, CSS::Keyword::OldstyleNums>> {
using enum FontVariantNumericFigure;
switch (value) {
case Normal: return std::nullopt;
case LiningNumbers: return CSS::Keyword::LiningNums { };
case OldStyleNumbers: return CSS::Keyword::OldstyleNums { };
}
RELEASE_ASSERT_NOT_REACHED();
};
auto spacingValue = [](auto value) -> std::optional<Variant<CSS::Keyword::ProportionalNums, CSS::Keyword::TabularNums>> {
using enum FontVariantNumericSpacing;
switch (value) {
case Normal: return std::nullopt;
case ProportionalNumbers: return CSS::Keyword::ProportionalNums { };
case TabularNumbers: return CSS::Keyword::TabularNums { };
}
RELEASE_ASSERT_NOT_REACHED();
};
auto fractionValue = [](auto value) -> std::optional<Variant<CSS::Keyword::DiagonalFractions, CSS::Keyword::StackedFractions>> {
using enum FontVariantNumericFraction;
switch (value) {
case Normal: return std::nullopt;
case DiagonalFractions: return CSS::Keyword::DiagonalFractions { };
case StackedFractions: return CSS::Keyword::StackedFractions { };
}
RELEASE_ASSERT_NOT_REACHED();
};
auto ordinalValue = [](auto value) -> std::optional<CSS::Keyword::Ordinal> {
using enum FontVariantNumericOrdinal;
switch (value) {
case Normal: return std::nullopt;
case Yes: return CSS::Keyword::Ordinal { };
}
RELEASE_ASSERT_NOT_REACHED();
};
auto slashedZeroValue = [](auto value) -> std::optional<CSS::Keyword::SlashedZero> {
using enum FontVariantNumericSlashedZero;
switch (value) {
case Normal: return std::nullopt;
case Yes: return CSS::Keyword::SlashedZero { };
}
RELEASE_ASSERT_NOT_REACHED();
};
return visitor(SpaceSeparatedTuple {
figureValue(m_platform.figure),
spacingValue(m_platform.spacing),
fractionValue(m_platform.fraction),
ordinalValue(m_platform.ordinal),
slashedZeroValue(m_platform.slashedZero),
});
}
constexpr bool operator==(const FontVariantNumeric&) const = default;
private:
Platform m_platform;
};
// MARK: - Conversion
template<> struct CSSValueConversion<FontVariantNumeric> { auto operator()(BuilderState&, const CSSValue&) -> FontVariantNumeric; };
} // namespace Style
} // namespace WebCore
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::FontVariantNumeric)
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