/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#ifndef CustomElementUpgradeCandidateMap_h
#define CustomElementUpgradeCandidateMap_h

#include "core/dom/custom/CustomElementDescriptor.h"
#include "core/dom/custom/CustomElementDescriptorHash.h"
#include "core/dom/custom/CustomElementObserver.h"
#include "wtf/HashMap.h"
#include "wtf/LinkedHashSet.h"
#include "wtf/Noncopyable.h"

namespace blink {

class CustomElementUpgradeCandidateMap final : public CustomElementObserver {
    WTF_MAKE_NONCOPYABLE(CustomElementUpgradeCandidateMap);
public:
    static PassOwnPtrWillBeRawPtr<CustomElementUpgradeCandidateMap> create();
    virtual ~CustomElementUpgradeCandidateMap();

    // API for CustomElementRegistrationContext to save and take candidates

    typedef WillBeHeapLinkedHashSet<RawPtrWillBeWeakMember<Element>> ElementSet;

    void add(const CustomElementDescriptor&, Element*);
    PassOwnPtrWillBeRawPtr<ElementSet> takeUpgradeCandidatesFor(const CustomElementDescriptor&);

    DECLARE_VIRTUAL_TRACE();

private:
    CustomElementUpgradeCandidateMap() { }

    virtual void elementWasDestroyed(Element*) override;

    typedef WillBeHeapHashMap<RawPtrWillBeWeakMember<Element>, CustomElementDescriptor> UpgradeCandidateMap;
    UpgradeCandidateMap m_upgradeCandidates;

    typedef WillBeHeapHashMap<CustomElementDescriptor, OwnPtrWillBeMember<ElementSet>> UnresolvedDefinitionMap;
    UnresolvedDefinitionMap m_unresolvedDefinitions;
};

} // namespace blink

#endif // CustomElementUpgradeCandidateMap_h
