gecko-dev/editor/libeditor/base/CreateElementTxn.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 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef CreateElementTxn_h__
#define CreateElementTxn_h__
#include "EditTxn.h"
#include "nsIEditor.h"
#include "nsIDOMNode.h"
#include "nsCOMPtr.h"
#define CREATE_ELEMENT_TXN_CID \
{/* 7a6393c0-ac48-11d2-86d8-000064657374 */ \
0x7a6393c0, 0xac48, 0x11d2, \
{0x86, 0xd8, 0x0, 0x0, 0x64, 0x65, 0x73, 0x74} }
/**
* A transaction that creates a new node in the content tree.
*/
class CreateElementTxn : public EditTxn
{
public:
static const nsIID& GetCID() { static nsIID iid = CREATE_ELEMENT_TXN_CID; return iid; }
enum { eAppend=-1 };
/** Initialize the transaction.
* @param aEditor the provider of basic editing functionality
* @param aTag the tag (P, HR, TABLE, etc.) for the new element
* @param aParent the node into which the new element will be inserted
* @param aOffsetInParent the location in aParent to insert the new element
* if eAppend, the new element is appended as the last child
*/
NS_IMETHOD Init(nsIEditor *aEditor,
const nsString& aTag,
nsIDOMNode *aParent,
PRUint32 aOffsetInParent);
private:
CreateElementTxn();
public:
virtual ~CreateElementTxn();
NS_IMETHOD Do(void);
NS_IMETHOD Undo(void);
NS_IMETHOD Redo(void);
NS_IMETHOD Merge(PRBool *aDidMerge, nsITransaction *aTransaction);
NS_IMETHOD Write(nsIOutputStream *aOutputStream);
NS_IMETHOD GetUndoString(nsString *aString);
NS_IMETHOD GetRedoString(nsString *aString);
NS_IMETHOD GetNewNode(nsIDOMNode **aNewNode);
protected:
/** the document into which the new node will be inserted */
nsIEditor* mEditor;
/** the tag (mapping to object type) for the new element */
nsString mTag;
/** the node into which the new node will be inserted */
nsCOMPtr<nsIDOMNode> mParent;
/** the index in mParent for the new node */
PRUint32 mOffsetInParent;
/** the new node to insert */
nsCOMPtr<nsIDOMNode> mNewNode;
/** the node we will insert mNewNode before. We compute this ourselves. */
nsCOMPtr<nsIDOMNode> mRefNode;
friend class TransactionFactory;
};
#endif