#ifndef HTMLCollection_h
#define HTMLCollection_h
#include "CollectionType.h"
#include "LiveNodeList.h"
#include "ScriptWrappable.h"
#include <wtf/Forward.h>
#include <wtf/HashMap.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/Vector.h>
namespace WebCore {
class HTMLCollection : public LiveNodeListBase {
public:
static PassRefPtr<HTMLCollection> create(Node* base, CollectionType);
virtual ~HTMLCollection();
virtual Node* namedItem(const AtomicString& name) const;
PassRefPtr<NodeList> tags(const String&);
virtual bool hasNamedItem(const AtomicString& name) const;
void namedItems(const AtomicString& name, Vector<RefPtr<Node> >&) const;
bool isEmpty() const
{
if (isLengthCacheValid())
return !cachedLength();
if (isItemCacheValid())
return !cachedItem();
return !item(0);
}
bool hasExactlyOneItem() const
{
if (isLengthCacheValid())
return cachedLength() == 1;
if (isItemCacheValid())
return cachedItem() && !cachedItemOffset() && !item(1);
return item(0) && !item(1);
}
virtual Element* virtualItemAfter(unsigned& offsetInArray, Element*) const;
Element* traverseFirstElement(unsigned& offsetInArray, ContainerNode* root) const;
Element* traverseForwardToOffset(unsigned offset, Element* currentElement, unsigned& currentOffset, unsigned& offsetInArray, ContainerNode* root) const;
protected:
HTMLCollection(Node* base, CollectionType, ItemAfterOverrideType);
virtual void updateNameCache() const;
typedef HashMap<AtomicStringImpl*, OwnPtr<Vector<Element*> > > NodeCacheMap;
Vector<Element*>* idCache(const AtomicString& name) const { return m_idCache.get(name.impl()); }
Vector<Element*>* nameCache(const AtomicString& name) const { return m_nameCache.get(name.impl()); }
void appendIdCache(const AtomicString& name, Element* element) const { append(m_idCache, name, element); }
void appendNameCache(const AtomicString& name, Element* element) const { append(m_nameCache, name, element); }
private:
Element* traverseNextElement(unsigned& offsetInArray, Element* previous, ContainerNode* root) const;
virtual bool isLiveNodeList() const OVERRIDE { ASSERT_NOT_REACHED(); return true; }
static void append(NodeCacheMap&, const AtomicString&, Element*);
mutable NodeCacheMap m_idCache;
mutable NodeCacheMap m_nameCache;
mutable unsigned m_cachedElementsArrayOffset;
friend class LiveNodeListBase;
};
}
#endif