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/*
* Copyright (C) 2024 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 "CSSCubicBezierEasingFunction.h"
#include "CSSLinearEasingFunction.h"
#include "CSSSpringEasingFunction.h"
#include "CSSStepsEasingFunction.h"
namespace WebCore {
namespace CSS {
// `EasingFunction` uses a wrapping a struct to allow forward declaration.
struct EasingFunction {
std::variant<
// <linear()>
Keyword::Linear, // Equivalent to linear(0, 1)
LinearEasingFunction,
// <cubic-bezier()>
Keyword::Ease, // Equivalent to cubic-bezier(0.25, 0.1, 0.25, 1)
Keyword::EaseIn, // Equivalent to cubic-bezier(0.42, 0, 1, 1)
Keyword::EaseOut, // Equivalent to cubic-bezier(0, 0, 0.58, 1)
Keyword::EaseInOut, // Equivalent to cubic-bezier(0.42, 0, 0.58, 1)
CubicBezierEasingFunction,
// <steps()>
Keyword::StepStart, // Equivalent to steps(1, start)
Keyword::StepEnd, // Equivalent to steps(1, end)
StepsEasingFunction,
// <spring()>
SpringEasingFunction
> value;
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
return WTF::switchOn(value, std::forward<F>(f)...);
}
bool operator==(const EasingFunction&) const = default;
};
} // namespace CSS
} // namespace WebCore
template<> inline constexpr auto WebCore::TreatAsVariantLike<WebCore::CSS::EasingFunction> = true;
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