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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_DOM_NAMES_MAP_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_DOM_NAMES_MAP_H_
#include <optional>
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/element_rare_data_field.h"
#include "third_party/blink/renderer/core/dom/space_split_string.h"
#include "third_party/blink/renderer/core/dom/space_split_string_wrapper.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_map.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string_hash.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
// Parses and stores mappings from part name to ordered set of part names as in
// http://drafts.csswg.org/css-shadow-parts/.
// TODO(crbug/805271): Deduplicate identical maps as SpaceSplitString does so
// that elements with identical exportparts attributes share instances.
class CORE_EXPORT NamesMap : public GarbageCollected<NamesMap>,
public ElementRareDataField {
public:
NamesMap() = default;
NamesMap(const NamesMap&) = delete;
NamesMap& operator=(const NamesMap&) = delete;
explicit NamesMap(const AtomicString& string);
// Clears any existing mapping, parses the string and sets the mapping from
// that.
void Set(const AtomicString&);
void Clear() { data_.clear(); }
// Inserts value into the ordered set under key.
void Add(const AtomicString& key, const AtomicString& value);
SpaceSplitString* Get(const AtomicString& key) const;
size_t size() const { return data_.size(); }
void Trace(Visitor* visitor) const override {
visitor->Trace(data_);
ElementRareDataField::Trace(visitor);
}
private:
template <typename CharacterType>
void Set(base::span<const CharacterType>);
HeapHashMap<AtomicString, Member<SpaceSplitStringWrapper>> data_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_DOM_NAMES_MAP_H_
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