xref: /external/chromium_org/third_party/WebKit/Source/core/dom/shadow/ContentDistribution.h

/*
 * 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.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#ifndef ContentDistribution_h
#define ContentDistribution_h

#include "core/dom/Node.h"
#include "wtf/Forward.h"
#include "wtf/HashMap.h"
#include "wtf/Vector.h"

namespace WebCore {

class ContentDistribution {
public:
    ContentDistribution() { m_nodes.reserveInitialCapacity(32); }

    PassRefPtr<Node> first() const { return m_nodes.first(); }
    PassRefPtr<Node> last() const { return m_nodes.last(); }
    PassRefPtr<Node> at(size_t index) const { return m_nodes.at(index); }

    size_t size() const { return m_nodes.size(); }
    bool isEmpty() const { return m_nodes.isEmpty(); }

    void append(PassRefPtr<Node>);
    void clear() { m_nodes.clear(); m_indices.clear(); }
    void shrinkToFit() { m_nodes.shrinkToFit(); }

    bool contains(const Node* node) const { return m_indices.contains(node); }
    size_t find(const Node*) const;
    Node* nextTo(const Node*) const;
    Node* previousTo(const Node*) const;

    void swap(ContentDistribution& other);

    const Vector<RefPtr<Node> >& nodes() const { return m_nodes; }

private:
    Vector<RefPtr<Node> > m_nodes;
    HashMap<const Node*, size_t> m_indices;
};

}

#endif