gecko-dev/editor/base/DeleteRangeTxn.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 1.1 (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 Netscape are
* Copyright (C) 1998-1999 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#ifndef DeleteRangeTxn_h__
#define DeleteRangeTxn_h__
#include "EditAggregateTxn.h"
#include "nsIDOMNode.h"
#include "nsIDOMRange.h"
#include "nsIEditor.h"
#include "nsCOMPtr.h"
class nsIDOMDocument;
#define DELETE_RANGE_TXN_CID \
{/* 5ec6b260-ac49-11d2-86d8-000064657374 */ \
0x5ec6b260, 0xac49, 0x11d2, \
{0x86, 0xd8, 0x0, 0x0, 0x64, 0x65, 0x73, 0x74} }
class nsIDOMRange;
class nsIEditor;
/**
* A transaction that deletes an entire range in the content tree
*/
class DeleteRangeTxn : public EditAggregateTxn
{
public:
static const nsIID& GetCID() { static nsIID iid = DELETE_RANGE_TXN_CID; return iid; }
/** initialize the transaction.
* @param aEditor the object providing basic editing operations
* @param aRange the range to delete
*/
NS_IMETHOD Init(nsIEditor *aEditor, nsIDOMRange *aRange);
private:
DeleteRangeTxn();
public:
virtual ~DeleteRangeTxn();
NS_IMETHOD DoTransaction(void);
NS_IMETHOD UndoTransaction(void);
NS_IMETHOD RedoTransaction(void);
NS_IMETHOD Merge(nsITransaction *aTransaction, PRBool *aDidMerge);
NS_IMETHOD GetTxnDescription(nsAWritableString& aTxnDescription);
protected:
NS_IMETHOD CreateTxnsToDeleteBetween(nsIDOMNode *aStartParent,
PRUint32 aStartOffset,
PRUint32 aEndOffset);
NS_IMETHOD CreateTxnsToDeleteNodesBetween();
NS_IMETHOD CreateTxnsToDeleteContent(nsIDOMNode *aParent,
PRUint32 aOffset,
nsIEditor::EDirection aAction);
protected:
/** p1 in the range */
nsCOMPtr<nsIDOMRange> mRange; // is this really an owning ptr?
/** p1 in the range */
nsCOMPtr<nsIDOMNode> mStartParent;
/** p1 offset */
PRInt32 mStartOffset;
/** p2 in the range */
nsCOMPtr<nsIDOMNode> mEndParent;
/** the closest common parent of p1 and p2 */
nsCOMPtr<nsIDOMNode> mCommonParent;
/** p2 offset */
PRInt32 mEndOffset;
/** the editor for this transaction */
nsIEditor* mEditor;
friend class TransactionFactory;
};
#endif