third_party/WebKit/Source/core/dom/shadow/ShadowRootRareData.h

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
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#ifndef ShadowRootRareData_h
#define ShadowRootRareData_h

#include "core/dom/shadow/InsertionPoint.h"
#include "core/html/HTMLSlotElement.h"
#include "wtf/Vector.h"

namespace blink {

class ShadowRootRareData : public GarbageCollected<ShadowRootRareData> {
public:
    ShadowRootRareData()
        : m_childShadowRootCount(0)
        , m_descendantSlotCount(0)
    {
    }

    bool containsShadowRoots() const { return m_childShadowRootCount; }

    void didAddChildShadowRoot() { ++m_childShadowRootCount; }
    void didRemoveChildShadowRoot() { DCHECK_GT(m_childShadowRootCount, 0u); --m_childShadowRootCount; }

    unsigned childShadowRootCount() const { return m_childShadowRootCount; }

    StyleSheetList* styleSheets() { return m_styleSheetList.get(); }
    void setStyleSheets(StyleSheetList* styleSheetList) { m_styleSheetList = styleSheetList; }

    void didAddSlot() { ++m_descendantSlotCount; }
    void didRemoveSlot() { DCHECK_GT(m_descendantSlotCount, 0u); --m_descendantSlotCount; }

    unsigned descendantSlotCount() const { return m_descendantSlotCount; }

    const HeapVector<Member<HTMLSlotElement>>& descendantSlots() const { return m_descendantSlots; }

    void setDescendantSlots(HeapVector<Member<HTMLSlotElement>>& slots) { m_descendantSlots.swap(slots); }
    void clearDescendantSlots() { m_descendantSlots.clear(); }

    DEFINE_INLINE_TRACE()
    {
        visitor->trace(m_styleSheetList);
        visitor->trace(m_descendantSlots);
    }

private:
    unsigned m_childShadowRootCount;
    Member<StyleSheetList> m_styleSheetList;
    unsigned m_descendantSlotCount;
    HeapVector<Member<HTMLSlotElement>> m_descendantSlots;
};

} // namespace blink

#endif