gecko-dev/editor/base/DeleteElementTxn.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef DeleteElementTxn_h__
#define DeleteElementTxn_h__
#include "EditTxn.h"
#include "nsIDOMNode.h"
#include "nsCOMPtr.h"
#define DELETE_ELEMENT_TXN_IID \
{/* 6fd77770-ac49-11d2-86d8-000064657374 */ \
0x6fd77770, 0xac49, 0x11d2, \
{0x86, 0xd8, 0x0, 0x0, 0x64, 0x65, 0x73, 0x74} }
/**
* A transaction that deletes a single element
*/
class DeleteElementTxn : public EditTxn
{
public:
virtual nsresult Init(nsIDOMNode *aElement,
nsIDOMNode *aParent);
private:
DeleteElementTxn();
public:
virtual ~DeleteElementTxn();
virtual nsresult Do(void);
virtual nsresult Undo(void);
virtual nsresult Redo(void);
virtual nsresult Merge(PRBool *aDidMerge, nsITransaction *aTransaction);
virtual nsresult Write(nsIOutputStream *aOutputStream);
virtual nsresult GetUndoString(nsString **aString);
virtual nsresult GetRedoString(nsString **aString);
protected:
/** the element to delete */
nsCOMPtr<nsIDOMNode> mElement;
/** the node into which the new node will be inserted */
nsCOMPtr<nsIDOMNode> mParent;
/** the index in mParent for the new node */
PRUint32 mOffsetInParent;
/** the node we will insert mNewNode before. We compute this ourselves. */
nsCOMPtr<nsIDOMNode> mRefNode;
friend class TransactionFactory;
};
#endif