72 lines
2.0 KiB
C++
72 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __nsIContentIterator_h___
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#define __nsIContentIterator_h___
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#include "nsISupports.h"
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#include "nsCOMPtr.h"
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class nsINode;
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class nsIDOMRange;
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#define NS_ICONTENTITERATOR_IID \
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{ 0x2550078e, 0xae87, 0x4914, \
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{ 0xb3, 0x04, 0xe4, 0xd1, 0x46, 0x19, 0x3d, 0x5f } }
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class nsIContentIterator : public nsISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_ICONTENTITERATOR_IID)
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/* Initializes an iterator for the subtree rooted by the node aRoot
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*/
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virtual nsresult Init(nsINode* aRoot) = 0;
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/* Initializes an iterator for the subtree defined by the range aRange
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Subclasses should make sure they implement both of these!
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*/
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virtual nsresult Init(nsIDOMRange* aRange) = 0;
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/** First will reset the list.
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*/
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virtual void First() = 0;
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/** Last will reset the list to the end.
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*/
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virtual void Last() = 0;
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/** Next will advance the list.
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*/
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virtual void Next() = 0;
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/** Prev will decrement the list.
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*/
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virtual void Prev() = 0;
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/** CurrentItem will return the current item, or null if the list is empty
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* @return the current node
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*/
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virtual nsINode *GetCurrentNode() = 0;
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/** return if the collection is at the end. that is the beginning following a call to Prev
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* and it is the end of the list following a call to next
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* @return if the iterator is done.
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*/
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virtual bool IsDone() = 0;
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/** PositionAt will position the iterator to the supplied node
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*/
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virtual nsresult PositionAt(nsINode* aCurNode) = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIContentIterator, NS_ICONTENTITERATOR_IID)
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already_AddRefed<nsIContentIterator> NS_NewContentIterator();
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already_AddRefed<nsIContentIterator> NS_NewPreContentIterator();
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already_AddRefed<nsIContentIterator> NS_NewContentSubtreeIterator();
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#endif // __nsIContentIterator_h___
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