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/*
* Copyright (C) 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 "StyleScopeIdentifier.h"
#include <wtf/Forward.h>
#include <wtf/text/AtomString.h>
namespace WebCore {
class Element;
namespace Style {
class Scope;
struct ScopedName;
// A ScopedName that has been resolved to determine which specific scope it belongs to.
class ResolvedScopedName {
WTF_DEPRECATED_MAKE_FAST_ALLOCATED(ResolvedScopedName);
public:
ResolvedScopedName(AtomString, ScopeIdentifier);
// Creates a ResolvedScopedName from a ScopedName by resolving the scope ordinal
// into the concrete Style::Scope object.
static ResolvedScopedName createFromScopedName(const Element&, const ScopedName&);
AtomString name() const { return m_name; }
ScopeIdentifier scopeIdentifier() const { return m_scopeIdentifier; }
friend bool operator==(const ResolvedScopedName& lhs, const ResolvedScopedName& rhs) = default;
private:
AtomString m_name;
ScopeIdentifier m_scopeIdentifier;
};
inline void add(Hasher& hasher, const ResolvedScopedName& name)
{
add(hasher, name.name(), name.scopeIdentifier());
}
} // namespace Style
} // namespace WebCore
namespace WTF {
template <>
struct DefaultHash<WebCore::Style::ResolvedScopedName> {
static unsigned hash(const WebCore::Style::ResolvedScopedName& name) { return computeHash(name); }
static bool equal(const WebCore::Style::ResolvedScopedName& a, const WebCore::Style::ResolvedScopedName& b) { return a == b; }
static constexpr bool safeToCompareToEmptyOrDeleted = true;
};
template<>
struct HashTraits<WebCore::Style::ResolvedScopedName> : GenericHashTraits<WebCore::Style::ResolvedScopedName> {
static const bool emptyValueIsZero = true;
static WebCore::Style::ResolvedScopedName emptyValue()
{
return { WTF::nullAtom(), HashTraits<WebCore::Style::ScopeIdentifier>::emptyValue() };
}
static void constructDeletedValue(WebCore::Style::ResolvedScopedName& slot)
{
new (NotNull, std::addressof(slot)) WebCore::Style::ResolvedScopedName { HashTableDeletedValue, HashTableDeletedValue };
}
static bool isDeletedValue(const WebCore::Style::ResolvedScopedName& value)
{
return value.name().isHashTableDeletedValue() && value.scopeIdentifier().isHashTableDeletedValue();
}
};
} // namespace WTF
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