gecko-dev/xpcom/ds/nsEnumeratorUtils.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#ifndef nsEnumeratorUtils_h__
#define nsEnumeratorUtils_h__
#include "nsIEnumerator.h"
#include "nsISupportsArray.h"
class NS_COM nsArrayEnumerator : public nsISimpleEnumerator
{
public:
// nsISupports interface
NS_DECL_ISUPPORTS
// nsISimpleEnumerator interface
NS_IMETHOD HasMoreElements(PRBool* aResult);
NS_IMETHOD GetNext(nsISupports** aResult);
// nsArrayEnumerator methods
nsArrayEnumerator(nsISupportsArray* aValueArray);
private:
~nsArrayEnumerator(void);
protected:
nsISupportsArray* mValueArray;
PRInt32 mIndex;
};
extern NS_COM nsresult
NS_NewArrayEnumerator(nsISimpleEnumerator* *result,
nsISupportsArray* array);
////////////////////////////////////////////////////////////////////////////////
class NS_COM nsSingletonEnumerator : public nsISimpleEnumerator
{
public:
NS_DECL_ISUPPORTS
// nsISimpleEnumerator methods
NS_IMETHOD HasMoreElements(PRBool* aResult);
NS_IMETHOD GetNext(nsISupports** aResult);
nsSingletonEnumerator(nsISupports* aValue);
private:
~nsSingletonEnumerator();
protected:
nsISupports* mValue;
PRBool mConsumed;
};
extern "C" NS_COM nsresult
NS_NewSingletonEnumerator(nsISimpleEnumerator* *result,
nsISupports* singleton);
////////////////////////////////////////////////////////////////////////
class NS_COM nsUnionEnumerator : public nsISimpleEnumerator
{
public:
NS_DECL_ISUPPORTS
// nsISimpleEnumerator methods
NS_IMETHOD HasMoreElements(PRBool* aResult);
NS_IMETHOD GetNext(nsISupports** aResult);
nsUnionEnumerator(nsISimpleEnumerator* firstEnumerator,
nsISimpleEnumerator* secondEnumerator);
private:
~nsUnionEnumerator();
protected:
nsCOMPtr<nsISimpleEnumerator> mFirstEnumerator, mSecondEnumerator;
PRBool mConsumed;
PRBool mAtSecond;
};
extern "C" NS_COM nsresult
NS_NewUnionEnumerator(nsISimpleEnumerator* *result,
nsISimpleEnumerator* firstEnumerator,
nsISimpleEnumerator* secondEnumerator);
////////////////////////////////////////////////////////////////////////
#endif /* nsEnumeratorUtils_h__ */