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/*
* Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
* Copyright (C) 2025 Samuel Weinig <sam@webkit.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#pragma once
#if ENABLE(TEXT_AUTOSIZING)
#include "StylePrimitiveNumericTypes.h"
namespace WebCore {
namespace Style {
// <'-webkit-text-size-adjust'> = auto | none | <percentage [0,∞]>
// https://drafts.csswg.org/css-size-adjust/#propdef-text-size-adjust
struct TextSizeAdjust {
constexpr TextSizeAdjust(CSS::Keyword::None)
: m_value(None)
{
}
constexpr TextSizeAdjust(CSS::Keyword::Auto)
: m_value(Auto)
{
}
constexpr TextSizeAdjust(Percentage<CSS::Nonnegative, float> value)
: m_value(value.value)
{
ASSERT_UNDER_CONSTEXPR_CONTEXT(m_value >= 0);
}
constexpr float percentage() const { ASSERT_UNDER_CONSTEXPR_CONTEXT(m_value >= 0); return m_value; }
constexpr float multiplier() const { ASSERT_UNDER_CONSTEXPR_CONTEXT(m_value >= 0); return m_value / 100; }
constexpr bool isAuto() const { return m_value == Auto; }
constexpr bool isNone() const { return m_value == None; }
constexpr bool isPercentage() const { return m_value >= 0; }
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
auto visitor = WTF::makeVisitor(std::forward<F>(f)...);
if (isAuto())
return visitor(CSS::Keyword::Auto { });
if (isNone())
return visitor(CSS::Keyword::None { });
ASSERT(isPercentage());
return visitor(Percentage<CSS::Nonnegative, float> { m_value });
}
constexpr bool operator==(const TextSizeAdjust&) const = default;
private:
static constexpr float Auto = -1;
static constexpr float None = -2;
float m_value;
};
// MARK: - Conversion
template<> struct CSSValueConversion<TextSizeAdjust> { auto operator()(BuilderState&, const CSSValue&) -> TextSizeAdjust; };
} // namespace Style
} // namespace WebCore
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::TextSizeAdjust)
#endif // ENABLE(TEXT_AUTOSIZING)
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