/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Netscape 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/NPL/
 *
 * 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):
 *   Pierre Phaneuf <pp@ludusdesign.com>
 *
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either 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 NPL, 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 NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "EditTxn.h"
#include "nsCOMPtr.h"
#include "nsIDOMNode.h"
#include "nsIDOMNodeList.h"

static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
static NS_DEFINE_IID(kITransactionIID, NS_ITRANSACTION_IID);

NS_IMPL_ADDREF(EditTxn)
NS_IMPL_RELEASE(EditTxn)

// note that aEditor is not refcounted
EditTxn::EditTxn()
{
  NS_INIT_REFCNT();
}

EditTxn::~EditTxn()
{
}

NS_IMETHODIMP EditTxn::DoTransaction(void)
{
  return NS_OK;
}

NS_IMETHODIMP EditTxn::UndoTransaction(void)
{
  return NS_OK;
}

NS_IMETHODIMP EditTxn::RedoTransaction(void)
{
  return DoTransaction();
}

NS_IMETHODIMP EditTxn::GetIsTransient(PRBool *aIsTransient)
{
  if (nsnull!=aIsTransient)
    *aIsTransient = PR_FALSE;
  return NS_OK;
}

NS_IMETHODIMP EditTxn::Merge(nsITransaction *aTransaction, PRBool *aDidMerge)
{
  return NS_OK;
}

NS_IMETHODIMP EditTxn::GetTxnDescription(nsAWritableString& aString)
{
  aString.Assign(NS_LITERAL_STRING("EditTxn"));
  return NS_OK;
}

NS_IMETHODIMP
EditTxn::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
  if (NULL == aInstancePtr) {
    return NS_ERROR_NULL_POINTER;
  }
  if (aIID.Equals(kISupportsIID)) {
    nsITransaction *tmp = this;
    nsISupports *tmp2 = tmp;
    *aInstancePtr = (void*)(nsISupports*)tmp2;
    NS_ADDREF_THIS();
    return NS_OK;
  }
  if (aIID.Equals(kITransactionIID)) {
    *aInstancePtr = (void*)(nsITransaction*)this;
    NS_ADDREF_THIS();
    return NS_OK;
  }
  if (aIID.Equals(NS_GET_IID(nsPIEditorTransaction))) {
    *aInstancePtr = (void*)(nsPIEditorTransaction*)this;
    NS_ADDREF_THIS();
    return NS_OK;
  }
  
  
  *aInstancePtr = 0;
  return NS_NOINTERFACE;
}