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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 CreateElementTxn_h__
#define CreateElementTxn_h__

#include "EditTxn.h"
#include "nsEditor.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 const 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(nsEditor *aEditor,
                  const nsAString& aTag,
                  nsIDOMNode *aParent,
                  PRUint32 aOffsetInParent);

private:
  CreateElementTxn();

public:
  NS_DECL_EDITTXN

  NS_IMETHOD RedoTransaction();

  NS_IMETHOD GetNewNode(nsIDOMNode **aNewNode);

protected:
  
  /** the document into which the new node will be inserted */
  nsEditor* 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