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97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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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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#define SPLIT_ELEMENT_TXN_CID \
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{/* 690c6290-ac48-11d2-86d8-000064657374 */ \
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0x690c6290, 0xac48, 0x11d2, \
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{0x86, 0xd8, 0x0, 0x0, 0x64, 0x65, 0x73, 0x74} }
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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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static const nsIID& GetCID() { static nsIID iid = SPLIT_ELEMENT_TXN_CID; return iid; }
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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 (nsIEditor *aEditor,
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nsIDOMNode *aNode,
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PRInt32 aOffset);
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protected:
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SplitElementTxn();
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public:
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virtual ~SplitElementTxn();
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NS_IMETHOD Do(void);
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NS_IMETHOD Undo(void);
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NS_IMETHOD Redo(void);
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NS_IMETHOD Merge(PRBool *aDidMerge, nsITransaction *aTransaction);
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NS_IMETHOD Write(nsIOutputStream *aOutputStream);
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NS_IMETHOD GetUndoString(nsString *aString);
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NS_IMETHOD GetRedoString(nsString *aString);
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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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nsIEditor* mEditor;
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friend class TransactionFactory;
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};
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#endif
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