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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/StyleImageWrapper.h>
#include <wtf/PointerComparison.h>
namespace WebCore {
namespace Style {
struct ImageOrNone {
ImageOrNone(CSS::Keyword::None)
{
}
ImageOrNone(ImageWrapper&& image)
: m_value { WTFMove(image.value) }
{
}
ImageOrNone(RefPtr<StyleImage>&& image)
: m_value { WTFMove(image) }
{
}
bool isNone() const { return !m_value; }
bool isImage() const { return !!m_value; }
std::optional<ImageWrapper> tryImage() const { return m_value ? std::make_optional(ImageWrapper { *m_value }) : std::nullopt; }
RefPtr<StyleImage> tryStyleImage() const { return m_value; }
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
auto visitor = WTF::makeVisitor(std::forward<F>(f)...);
if (isNone())
return visitor(CSS::Keyword::None { });
return visitor(ImageWrapper { *m_value });
}
bool operator==(const ImageOrNone& other) const
{
return arePointingToEqualData(m_value, other.m_value);
}
private:
RefPtr<StyleImage> m_value { };
};
// MARK: - Conversion
template<> struct CSSValueConversion<ImageOrNone> { auto operator()(BuilderState&, const CSSValue&) -> ImageOrNone; };
// MARK: - Blending
template<> struct Blending<ImageOrNone> {
auto canBlend(const ImageOrNone&, const ImageOrNone&) -> bool;
auto blend(const ImageOrNone&, const ImageOrNone&, const BlendingContext&) -> ImageOrNone;
};
} // namespace Style
} // namespace WebCore
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::ImageOrNone)
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