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/*
* Copyright (C) 2024-2025 Apple Inc. All rights reserved.
*
* 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. AND ITS CONTRIBUTORS ``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 ITS CONTRIBUTORS
* 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/StyleScopeOrdinal.h>
#include <WebCore/StyleValueTypes.h>
namespace WebCore {
namespace Style {
// <name-scope> = none | all | <dashed-ident>#
// Used by:
// <'timeline-scope'>
// https://drafts.csswg.org/scroll-animations-1/#propdef-timeline-scope
// <'anchor-scope'>
// https://drafts.csswg.org/css-anchor-position-1/#propdef-anchor-scope
struct NameScope {
enum class Type : uint8_t { None, All, Ident };
NameScope(CSS::Keyword::None)
{
}
NameScope(CSS::Keyword::All, ScopeOrdinal scopeOrdinal)
: type { Type::All }
, scopeOrdinal { scopeOrdinal }
{
}
NameScope(CommaSeparatedListHashSet<CustomIdentifier>&& names, ScopeOrdinal scopeOrdinal)
: type { Type::Ident }
, names { WTFMove(names) }
, scopeOrdinal { scopeOrdinal }
{
}
Type type { Type::None };
CommaSeparatedListHashSet<CustomIdentifier> names;
ScopeOrdinal scopeOrdinal { ScopeOrdinal::Element };
template<typename... F> constexpr decltype(auto) switchOn(F&&...) const;
inline bool operator==(const NameScope&) const;
};
inline bool NameScope::operator==(const NameScope& other) const
{
return type == other.type
&& scopeOrdinal == other.scopeOrdinal
// Two name lists are equal if they contain the same values in the same order.
// FIXME: This is not symmetrical in the case that other.names.isEmpty() is true, but names.isEmpty() is false.
&& (names.isEmpty() || std::ranges::equal(names, other.names));
}
template<typename... F> constexpr decltype(auto) NameScope::switchOn(F&&... f) const
{
auto visitor = WTF::makeVisitor(std::forward<F>(f)...);
switch (type) {
case NameScope::Type::None:
return visitor(CSS::Keyword::None { });
case NameScope::Type::All:
return visitor(CSS::Keyword::All { });
case NameScope::Type::Ident:
if (names.isEmpty())
return visitor(CSS::Keyword::None { });
return visitor(names);
}
RELEASE_ASSERT_NOT_REACHED();
}
// MARK: - Conversion
template<> struct CSSValueConversion<NameScope> { auto operator()(BuilderState&, const CSSValue&) -> NameScope; };
} // namespace Style
} // namespace WebCore
DEFINE_VARIANT_LIKE_CONFORMANCE(WebCore::Style::NameScope)
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