gecko-dev/editor/base/EditTxn.cpp

108 lines
2.2 KiB
C++

/* -*- 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.
*/
#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::Do(void)
{
return NS_OK;
}
NS_IMETHODIMP EditTxn::Undo(void)
{
return NS_OK;
}
NS_IMETHODIMP EditTxn::Redo(void)
{
return Do();
}
NS_IMETHODIMP EditTxn::GetIsTransient(PRBool *aIsTransient)
{
if (nsnull!=aIsTransient)
*aIsTransient = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP EditTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
{
return NS_OK;
}
NS_IMETHODIMP EditTxn::Write(nsIOutputStream *aOutputStream)
{
return NS_OK;
}
NS_IMETHODIMP EditTxn::GetUndoString(nsString *aString)
{
if (nsnull!=aString)
*aString="";
return NS_OK;
}
NS_IMETHODIMP EditTxn::GetRedoString(nsString *aString)
{
if (nsnull!=aString)
*aString="";
return NS_OK;
}
NS_IMETHODIMP
EditTxn::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kISupportsIID)) {
*aInstancePtr = (void*)(nsISupports*)this;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kITransactionIID)) {
*aInstancePtr = (void*)(nsITransaction*)this;
NS_ADDREF_THIS();
return NS_OK;
}
*aInstancePtr = 0;
return NS_NOINTERFACE;
}