Source/core/dom/shadow/ScopeContentDistribution.h

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 */

#ifndef ScopeContentDistribution_h
#define ScopeContentDistribution_h

#include "wtf/Forward.h"
#include "wtf/Vector.h"

namespace WebCore {

class InsertionPoint;
class ShadowRoot;

class ScopeContentDistribution {
public:
    ScopeContentDistribution();

    InsertionPoint* insertionPointAssignedTo() const { return m_insertionPointAssignedTo.get(); }
    void setInsertionPointAssignedTo(PassRefPtr<InsertionPoint>);

    void registerInsertionPoint(InsertionPoint*);
    void unregisterInsertionPoint(InsertionPoint*);
    bool hasShadowElementChildren() const { return m_numberOfShadowElementChildren > 0; }
    bool hasContentElementChildren() const { return m_numberOfContentElementChildren > 0; }

    void registerElementShadow() { ++m_numberOfElementShadowChildren; }
    void unregisterElementShadow() { ASSERT(m_numberOfElementShadowChildren > 0); --m_numberOfElementShadowChildren; }
    unsigned numberOfElementShadowChildren() const { return m_numberOfElementShadowChildren; }
    bool hasElementShadowChildren() const { return m_numberOfElementShadowChildren > 0; }

    void invalidateInsertionPointList();
    const Vector<RefPtr<InsertionPoint> >& ensureInsertionPointList(ShadowRoot*);

private:
    RefPtr<InsertionPoint> m_insertionPointAssignedTo;
    unsigned m_numberOfShadowElementChildren;
    unsigned m_numberOfContentElementChildren;
    unsigned m_numberOfElementShadowChildren;
    bool m_insertionPointListIsValid;
    Vector<RefPtr<InsertionPoint> > m_insertionPointList;
};

} // namespace WebCore

#endif