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 * 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.
 *     * Neither the name of Google Inc. nor the names of its
 * 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
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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#ifndef CustomElementUpgradeCandidateMap_h
#define CustomElementUpgradeCandidateMap_h

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

namespace WebCore {

class Element;

class CustomElementUpgradeCandidateMap : CustomElementObserver {
    WTF_MAKE_NONCOPYABLE(CustomElementUpgradeCandidateMap);
public:
    CustomElementUpgradeCandidateMap() { }
    ~CustomElementUpgradeCandidateMap();

    // API for CustomElementRegistrationContext to save and take candidates

    typedef ListHashSet<Element*> ElementSet;

    void add(const CustomElementDescriptor&, Element*);
    void remove(Element*);
    ElementSet takeUpgradeCandidatesFor(const CustomElementDescriptor&);

private:
    virtual void elementWasDestroyed(Element*) OVERRIDE;
    void removeCommon(Element*);

    virtual void elementDidFinishParsingChildren(Element*) OVERRIDE;
    void moveToEnd(Element*);

    typedef HashMap<Element*, CustomElementDescriptor> UpgradeCandidateMap;
    UpgradeCandidateMap m_upgradeCandidates;

    typedef HashMap<CustomElementDescriptor, ElementSet> UnresolvedDefinitionMap;
    UnresolvedDefinitionMap m_unresolvedDefinitions;
};

}

#endif // CustomElementUpgradeCandidateMap_h