third_party/blink/renderer/core/dom/element_data_cache.h

/*
 * Copyright (C) 2012, 2013 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 COMPUTER, 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 COMPUTER, INC. OR
 * 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
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#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_DOM_ELEMENT_DATA_CACHE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_DOM_ELEMENT_DATA_CACHE_H_

#include "third_party/blink/renderer/core/dom/attribute.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/vector.h"

namespace blink {

class ShareableElementData;

class ElementDataCache final : public GarbageCollected<ElementDataCache> {
 public:
  ElementDataCache();

  ShareableElementData* CachedShareableElementDataWithAttributes(
      const Vector<Attribute, kAttributePrealloc>&);

  void Trace(Visitor*) const;

 private:
  typedef HeapHashMap<unsigned,
                      Member<ShareableElementData>,
                      AlreadyHashedTraits>
      ShareableElementDataCache;
  ShareableElementDataCache shareable_element_data_cache_;
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_DOM_ELEMENT_DATA_CACHE_H_