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95 lines
3.3 KiB
C++
95 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* vim: set ts=4 et sw=4 tw=80: */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is this file as it was released on May 1 2001.
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*
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* The Initial Developer of the Original Code is
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* Jonas Sicking.
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* Portions created by the Initial Developer are Copyright (C) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Jonas Sicking <sicking@bigfoot.com> (Original Author)
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* Craig Topper <craig.topper@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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* Implementation of DOM Traversal's nsIDOMTreeWalker
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*/
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#ifndef nsTreeWalker_h___
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#define nsTreeWalker_h___
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#include "nsIDOMTreeWalker.h"
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#include "nsTraversal.h"
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#include "nsCOMPtr.h"
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#include "nsTArray.h"
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#include "nsCycleCollectionParticipant.h"
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class nsINode;
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class nsIDOMNode;
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class nsIDOMNodeFilter;
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class nsTreeWalker : public nsIDOMTreeWalker, public nsTraversal
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{
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_NSIDOMTREEWALKER
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nsTreeWalker(nsINode *aRoot,
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PRUint32 aWhatToShow,
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nsIDOMNodeFilter *aFilter);
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virtual ~nsTreeWalker();
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NS_DECL_CYCLE_COLLECTION_CLASS(nsTreeWalker)
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private:
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nsCOMPtr<nsINode> mCurrentNode;
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/*
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* Implements FirstChild and LastChild which only vary in which direction
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* they search.
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* @param aReversed Controls whether we search forwards or backwards
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* @param _retval Returned node. Null if no child is found
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* @returns Errorcode
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*/
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nsresult FirstChildInternal(bool aReversed, nsIDOMNode **_retval);
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/*
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* Implements NextSibling and PreviousSibling which only vary in which
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* direction they search.
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* @param aReversed Controls whether we search forwards or backwards
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* @param _retval Returned node. Null if no child is found
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* @returns Errorcode
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*/
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nsresult NextSiblingInternal(bool aReversed, nsIDOMNode **_retval);
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};
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#endif
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