gecko-dev/content/base/public/nsIContentIterator.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* 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 the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef __nsIContentIterator_h___
#define __nsIContentIterator_h___
#include "nsISupports.h"
class nsIFocusTracker;
class nsIContent;
class nsIDOMRange;
#define NS_ICONTENTITERTOR_IID \
{0xa6cf90e4, 0x15b3, 0x11d2, \
{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
// {B4BC9F63-D9BA-11d3-9938-00108301233C}
#define NS_IGENERATEDCONTENTITERTOR_IID \
{ 0xb4bc9f63, 0xd9ba, 0x11d3, \
{ 0x99, 0x38, 0x0, 0x10, 0x83, 0x1, 0x23, 0x3c } }
class nsIContentIterator : public nsISupports {
public:
static const nsIID& GetIID() { static nsIID iid = NS_ICONTENTITERTOR_IID; return iid; }
/* Initializes an iterator for the subtree rooted by the node aRoot
*/
NS_IMETHOD Init(nsIContent* aRoot)=0;
/* Initializes an iterator for the subtree defined by the range aRange
*/
NS_IMETHOD Init(nsIDOMRange* aRange)=0;
/** First will reset the list. will return NS_FAILED if no items
*/
NS_IMETHOD First()=0;
/** Last will reset the list to the end. will return NS_FAILED if no items
*/
NS_IMETHOD Last()=0;
/** Next will advance the list. will return failed if allready at end
*/
NS_IMETHOD Next()=0;
/** Prev will decrement the list. will return failed if allready at beginning
*/
NS_IMETHOD Prev()=0;
/** CurrentItem will return the CurrentItem item it will fail if the list is empty
* @param aItem return value
*/
NS_IMETHOD CurrentNode(nsIContent **aNode)=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
* @param aItem return value
*/
NS_IMETHOD IsDone()=0;
/** PositionAt will position the iterator to the supplied node
*/
NS_IMETHOD PositionAt(nsIContent* aCurNode)=0;
/** MakePre will make the iterator a pre-order iterator
*/
NS_IMETHOD MakePre()=0;
/** MakePost will make the iterator a post-order iterator
*/
NS_IMETHOD MakePost()=0;
};
class nsIPresShell;
class nsIGeneratedContentIterator : public nsISupports {
public:
static const nsIID& GetIID() { static nsIID iid = NS_IGENERATEDCONTENTITERTOR_IID; return iid; }
/* Initializes an iterator for the subtree rooted by the node aRoot
*/
NS_IMETHOD Init(nsIPresShell *aShell, nsIDOMRange* aRange)=0;
NS_IMETHOD Init(nsIPresShell *aShell, nsIContent* aContent)=0;
};
#endif // __nsIContentIterator_h___