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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 THE COPYRIGHT HOLDER "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 THE COPYRIGHT HOLDER 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/PathOperation.h>
namespace WebCore {
namespace Style {
struct OffsetPath;
struct ClipPath;
enum SupportRayPathOperation : bool { No, Yes };
// <ray-path> = <ray()> || <coord-box>
struct RayPath {
explicit RayPath(Ref<RayPathOperation>&& operation) : operation { WTFMove(operation) } { }
explicit RayPath(const Ref<RayPathOperation>& operation) : operation { operation } { }
ALWAYS_INLINE const RayFunction& ray() const { return operation->ray(); }
ALWAYS_INLINE CSSBoxType referenceBox() const { return operation->referenceBox(); }
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
auto visitor = WTF::makeVisitor(std::forward<F>(f)...);
if (referenceBox() == CSSBoxType::BoxMissing)
return visitor(ray());
return visitor(SpaceSeparatedTuple { ray(), referenceBox() });
}
bool operator==(const RayPath& other) const
{
return arePointingToEqualData(operation, other.operation);
}
private:
friend ClipPath;
friend OffsetPath;
friend std::optional<WebCore::Path> tryPath(const RayPath&, const TransformOperationData&);
friend WTF::TextStream& operator<<(WTF::TextStream&, const RayPath&);
Ref<RayPathOperation> operation;
};
// <reference-path> = <url> || <coord-box>
struct ReferencePath {
explicit ReferencePath(Ref<ReferencePathOperation>&& operation) : operation { WTFMove(operation) } { }
explicit ReferencePath(const Ref<ReferencePathOperation>& operation) : operation { operation } { }
ALWAYS_INLINE const URL& url() const { return operation->url(); }
ALWAYS_INLINE const AtomString& fragment() const { return operation->fragment(); }
ALWAYS_INLINE CSSBoxType referenceBox() const { return operation->referenceBox(); }
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
auto visitor = WTF::makeVisitor(std::forward<F>(f)...);
if (referenceBox() == CSSBoxType::BoxMissing)
return visitor(url());
return visitor(SpaceSeparatedTuple { url(), referenceBox() });
}
bool operator==(const ReferencePath& other) const
{
return arePointingToEqualData(operation, other.operation);
}
private:
friend ClipPath;
friend OffsetPath;
friend std::optional<WebCore::Path> tryPath(const ReferencePath&, const TransformOperationData&);
friend WTF::TextStream& operator<<(WTF::TextStream&, const ReferencePath&);
Ref<ReferencePathOperation> operation;
};
// <basic-shape-path> = <basic-shape> || <coord-box>
struct BasicShapePath {
explicit BasicShapePath(Ref<ShapePathOperation>&& operation) : operation { WTFMove(operation) } { }
explicit BasicShapePath(const Ref<ShapePathOperation>& operation) : operation { operation } { }
ALWAYS_INLINE const BasicShape& shape() const { return operation->shape(); }
ALWAYS_INLINE CSSBoxType referenceBox() const { return operation->referenceBox(); }
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
auto visitor = WTF::makeVisitor(std::forward<F>(f)...);
if (referenceBox() == CSSBoxType::BoxMissing)
return visitor(shape());
return visitor(SpaceSeparatedTuple { shape(), referenceBox() });
}
bool operator==(const BasicShapePath& other) const
{
return arePointingToEqualData(operation, other.operation);
}
private:
friend ClipPath;
friend OffsetPath;
friend std::optional<WebCore::Path> tryPath(const BasicShapePath&, const TransformOperationData&);
friend WTF::TextStream& operator<<(WTF::TextStream&, const BasicShapePath&);
Ref<ShapePathOperation> operation;
};
// <box-path> = <coord-box>
struct BoxPath {
explicit BoxPath(Ref<BoxPathOperation>&& operation) : operation { WTFMove(operation) } { }
explicit BoxPath(const Ref<BoxPathOperation>& operation) : operation { operation } { }
ALWAYS_INLINE CSSBoxType referenceBox() const { return operation->referenceBox(); }
template<typename... F> decltype(auto) switchOn(F&&... f) const
{
auto visitor = WTF::makeVisitor(std::forward<F>(f)...);
return visitor(referenceBox());
}
bool operator==(const BoxPath& other) const
{
return operation.get() == other.operation.get();
}
private:
friend ClipPath;
friend OffsetPath;
friend std::optional<WebCore::Path> tryPath(const BoxPath&, const TransformOperationData&);
Ref<BoxPathOperation> operation;
};
inline std::optional<WebCore::Path> tryPath(const RayPath& rayPath, const TransformOperationData& data)
{
Ref operation = rayPath.operation;
return operation->getPath(data);
}
inline std::optional<WebCore::Path> tryPath(const ReferencePath& referencePath, const TransformOperationData& data)
{
Ref operation = referencePath.operation;
return operation->getPath(data);
}
inline std::optional<WebCore::Path> tryPath(const BasicShapePath& basicShapePath, const TransformOperationData& data)
{
Ref operation = basicShapePath.operation;
return operation->getPath(data);
}
inline std::optional<WebCore::Path> tryPath(const BoxPath& boxPath, const TransformOperationData& data)
{
Ref operation = boxPath.operation;
return operation->getPath(data);
}
// MARK: - Conversion
// Shared Converter for both ClipPath and OffsetPath
template<> struct CSSValueConversion<RefPtr<PathOperation>> { RefPtr<PathOperation> operator()(BuilderState&, const CSSValue&, SupportRayPathOperation); };
// `RayPath` is special-cased to return a `CSSRayValue`.
template<> struct CSSValueCreation<RayPath> { Ref<CSSValue> operator()(CSSValuePool&, const RenderStyle&, const RayPath&); };
// `BasicShapePath` is special-cased to handle non-standard `PathConversion` argument.
template<> struct CSSValueCreation<BasicShapePath> { Ref<CSSValue> operator()(CSSValuePool&, const RenderStyle&, const BasicShapePath&, PathConversion = PathConversion::None); };
// MARK: - Serialization
// `BasicShapePath` is special-cased to handle non-standard `PathConversion` argument.
template<> struct Serialize<BasicShapePath> { void operator()(StringBuilder&, const CSS::SerializationContext&, const RenderStyle&, const BasicShapePath&, PathConversion = PathConversion::None); };
// MARK: - Logging
WTF::TextStream& operator<<(WTF::TextStream&, const RayPath&);
WTF::TextStream& operator<<(WTF::TextStream&, const ReferencePath&);
WTF::TextStream& operator<<(WTF::TextStream&, const BasicShapePath&);
WTF::TextStream& operator<<(WTF::TextStream&, const BoxPath&);
} // namespace Style
} // namespace WebCore
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::RayPath)
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::ReferencePath)
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::BasicShapePath)
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::BoxPath)
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