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67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef SplitElementTxn_h__
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#define SplitElementTxn_h__
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#include "EditTxn.h" // for EditTxn, NS_DECL_EDITTXN
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#include "nsCOMPtr.h" // for nsCOMPtr
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#include "nsCycleCollectionParticipant.h"
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#include "nsIDOMNode.h" // for nsIDOMNode
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#include "nsISupportsImpl.h" // for NS_DECL_ISUPPORTS_INHERITED
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#include "nscore.h" // for NS_IMETHOD
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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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int32_t aOffset);
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SplitElementTxn();
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SplitElementTxn, EditTxn)
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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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int32_t 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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