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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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) 1998-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of 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 MPL, 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 MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef SplitElementTxn_h__
#define SplitElementTxn_h__
#include "EditTxn.h"
#include "nsIDOMNode.h"
#include "nsCOMPtr.h"
#include "nsIEditor.h"
#define SPLIT_ELEMENT_TXN_CID \
{/* 690c6290-ac48-11d2-86d8-000064657374 */ \
0x690c6290, 0xac48, 0x11d2, \
{0x86, 0xd8, 0x0, 0x0, 0x64, 0x65, 0x73, 0x74} }
class nsEditor;
/**
* A transaction that splits an element E into two identical nodes, E1 and E2
* with the children of E divided between E1 and E2.
*/
class SplitElementTxn : public EditTxn
{
public:
static const nsIID& GetCID() { static const nsIID iid = SPLIT_ELEMENT_TXN_CID; return iid; }
/** initialize the transaction.
* @param aEditor the provider of core editing operations
* @param aNode the node to split
* @param aOffset the location within aNode to do the split.
* aOffset may refer to children of aNode, or content of aNode.
* The left node will have child|content 0..aOffset-1.
*/
NS_IMETHOD Init (nsEditor *aEditor,
nsIDOMNode *aNode,
PRInt32 aOffset);
protected:
SplitElementTxn();
public:
virtual ~SplitElementTxn();
NS_IMETHOD DoTransaction(void);
NS_IMETHOD UndoTransaction(void);
NS_IMETHOD RedoTransaction(void);
NS_IMETHOD Merge(nsITransaction *aTransaction, PRBool *aDidMerge);
NS_IMETHOD GetTxnDescription(nsAString& aTxnDescription);
NS_IMETHOD GetNewNode(nsIDOMNode **aNewNode);
protected:
/** the element to operate upon */
nsCOMPtr<nsIDOMNode> mExistingRightNode;
/** the offset into mElement where the children of mElement are split.<BR>
* mOffset is the index of the first child in the right node.
* -1 means the new node gets no children.
*/
PRInt32 mOffset;
/** the element we create when splitting mElement */
nsCOMPtr<nsIDOMNode> mNewLeftNode;
/** the parent shared by mExistingRightNode and mNewLeftNode */
nsCOMPtr<nsIDOMNode> mParent;
nsEditor* mEditor;
friend class TransactionFactory;
};
#endif
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