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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 <WebCore/StyleScrollFunction.h>
#include <WebCore/StyleValueTypes.h>
#include <WebCore/StyleViewFunction.h>
namespace WebCore {
namespace Style {
// <single-animation-timeline> = auto | none | <custom-ident> | <scroll()> | <view()>
// https://www.w3.org/TR/css-animations-2/#typedef-single-animation-timeline
struct SingleAnimationTimeline {
SingleAnimationTimeline(CSS::Keyword::Auto keyword)
: m_value { keyword }
{
}
SingleAnimationTimeline(CSS::Keyword::None keyword)
: m_value { keyword }
{
}
SingleAnimationTimeline(CustomIdentifier&& identifier)
: m_value { identifier }
{
}
SingleAnimationTimeline(ScrollFunction&& scrollFunction)
: m_value { WTFMove(scrollFunction) }
{
}
SingleAnimationTimeline(ViewFunction&& viewFunction)
: m_value { WTFMove(viewFunction) }
{
}
bool isAuto() const { return std::holds_alternative<CSS::Keyword::Auto>(m_value); }
bool isNone() const { return std::holds_alternative<CSS::Keyword::None>(m_value); }
bool isCustomIdentifier() const { return std::holds_alternative<CustomIdentifier>(m_value); }
std::optional<CustomIdentifier> tryCustomIdentifier() const { return isCustomIdentifier() ? std::make_optional(std::get<CustomIdentifier>(m_value)) : std::nullopt; }
bool isScrollFunction() const { return std::holds_alternative<ScrollFunction>(m_value); }
std::optional<ScrollFunction> tryScrollFunction() const { return isScrollFunction() ? std::make_optional(std::get<ScrollFunction>(m_value)) : std::nullopt; }
bool isViewFunction() const { return std::holds_alternative<ViewFunction>(m_value); }
std::optional<ViewFunction> tryViewFunction() const { return isViewFunction() ? std::make_optional(std::get<ViewFunction>(m_value)) : std::nullopt; }
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
return WTF::switchOn(m_value, std::forward<F>(f)...);
}
bool operator==(const SingleAnimationTimeline&) const = default;
private:
Variant<CSS::Keyword::Auto, CSS::Keyword::None, CustomIdentifier, ScrollFunction, ViewFunction> m_value;
};
// MARK: - Conversion
template<> struct CSSValueConversion<SingleAnimationTimeline> { auto operator()(BuilderState&, const CSSValue&) -> SingleAnimationTimeline; };
} // namespace Style
} // namespace WebCore
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::SingleAnimationTimeline)
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