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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef __nsIContentIterator_h___
#define __nsIContentIterator_h___
#include "nsISupports.h"
#include "nsCOMPtr.h"
class nsINode;
class nsIDOMRange;
#define NS_ICONTENTITERATOR_IID \
{ 0x2550078e, 0xae87, 0x4914, \
{ 0xb3, 0x04, 0xe4, 0xd1, 0x46, 0x19, 0x3d, 0x5f } }
class nsIContentIterator : public nsISupports
{
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ICONTENTITERATOR_IID)
/* Initializes an iterator for the subtree rooted by the node aRoot
*/
virtual nsresult Init(nsINode* aRoot) = 0;
/* Initializes an iterator for the subtree defined by the range aRange
Subclasses should make sure they implement both of these!
*/
virtual nsresult Init(nsIDOMRange* aRange) = 0;
/** First will reset the list.
*/
virtual void First() = 0;
/** Last will reset the list to the end.
*/
virtual void Last() = 0;
/** Next will advance the list.
*/
virtual void Next() = 0;
/** Prev will decrement the list.
*/
virtual void Prev() = 0;
/** CurrentItem will return the current item, or null if the list is empty
* @return the current node
*/
virtual nsINode *GetCurrentNode() = 0;
/** return if the collection is at the end. that is the beginning following a call to Prev
* and it is the end of the list following a call to next
* @return if the iterator is done.
*/
virtual bool IsDone() = 0;
/** PositionAt will position the iterator to the supplied node
*/
virtual nsresult PositionAt(nsINode* aCurNode) = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIContentIterator, NS_ICONTENTITERATOR_IID)
already_AddRefed<nsIContentIterator> NS_NewContentIterator();
already_AddRefed<nsIContentIterator> NS_NewPreContentIterator();
already_AddRefed<nsIContentIterator> NS_NewContentSubtreeIterator();
#endif // __nsIContentIterator_h___
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