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97 lines
3.3 KiB
C++
97 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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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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#ifndef SplitElementTxn_h__
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#define SplitElementTxn_h__
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#include "EditTxn.h"
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#include "nsIDOMNode.h"
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#include "nsCOMPtr.h"
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#include "nsIEditor.h"
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class nsEditor;
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/**
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* A transaction that splits an element E into two identical nodes, E1 and E2
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* with the children of E divided between E1 and E2.
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*/
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class SplitElementTxn : public EditTxn
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{
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public:
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/** initialize the transaction.
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* @param aEditor the provider of core editing operations
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* @param aNode the node to split
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* @param aOffset the location within aNode to do the split.
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* aOffset may refer to children of aNode, or content of aNode.
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* The left node will have child|content 0..aOffset-1.
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*/
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NS_IMETHOD Init (nsEditor *aEditor,
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nsIDOMNode *aNode,
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PRInt32 aOffset);
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SplitElementTxn();
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SplitElementTxn, EditTxn)
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NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
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NS_DECL_EDITTXN
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NS_IMETHOD RedoTransaction(void);
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NS_IMETHOD GetNewNode(nsIDOMNode **aNewNode);
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protected:
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/** the element to operate upon */
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nsCOMPtr<nsIDOMNode> mExistingRightNode;
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/** the offset into mElement where the children of mElement are split.<BR>
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* mOffset is the index of the first child in the right node.
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* -1 means the new node gets no children.
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*/
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PRInt32 mOffset;
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/** the element we create when splitting mElement */
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nsCOMPtr<nsIDOMNode> mNewLeftNode;
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/** the parent shared by mExistingRightNode and mNewLeftNode */
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nsCOMPtr<nsIDOMNode> mParent;
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nsEditor* mEditor;
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};
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#endif
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