gecko-dev/xpcom/ds/nsEnumeratorUtils.h

102 lines
2.8 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#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);
// nsRDFArrayEnumerator methods
nsArrayEnumerator(nsISupportsArray* aValueArray);
virtual ~nsArrayEnumerator(void);
protected:
nsISupportsArray* mValueArray;
PRInt32 mIndex;
};
extern "C" 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);
virtual ~nsSingletonEnumerator();
protected:
nsISupports* mValue;
PRBool mConsumed;
};
extern "C" NS_COM nsresult
NS_NewSingletonEnumerator(nsISimpleEnumerator* *result,
nsISupports* singleton);
////////////////////////////////////////////////////////////////////////////////
class NS_COM nsAdapterEnumerator : public nsISimpleEnumerator
{
public:
NS_DECL_ISUPPORTS
// nsISimpleEnumerator methods
NS_IMETHOD HasMoreElements(PRBool* aResult);
NS_IMETHOD GetNext(nsISupports** aResult);
nsAdapterEnumerator(nsIEnumerator* aEnum);
virtual ~nsAdapterEnumerator();
protected:
nsIEnumerator* mEnum;
nsISupports* mCurrent;
PRBool mStarted;
};
extern "C" NS_COM nsresult
NS_NewAdapterEnumerator(nsISimpleEnumerator* *result,
nsIEnumerator* enumerator);
////////////////////////////////////////////////////////////////////////
#endif /* nsEnumeratorUtils_h__ */