gecko-dev/xpcom/ds/nsObserver.cpp

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3.5 KiB
C++
Исходник Обычный вид История

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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
* 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 "pratom.h"
#include "nsIFactory.h"
#include "nsIServiceManager.h"
#include "nsIComponentManager.h"
#include "nsIObserver.h"
#include "nsObserver.h"
static NS_DEFINE_CID(kObserverCID, NS_OBSERVER_CID);
////////////////////////////////////////////////////////////////////////////////
// nsObserver Implementation
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NS_IMPL_AGGREGATED(nsObserver)
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NS_COM nsresult NS_NewObserver(nsIObserver** anObserver, nsISupports* outer)
{
return nsObserver::Create(outer, NS_GET_IID(nsIObserver), (void**)anObserver);
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}
NS_METHOD
nsObserver::Create(nsISupports* outer, const nsIID& aIID, void* *anObserver)
{
NS_ENSURE_ARG_POINTER(anObserver);
NS_ENSURE_PROPER_AGGREGATION(outer, aIID);
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nsObserver* it = new nsObserver(outer);
if (it == NULL)
return NS_ERROR_OUT_OF_MEMORY;
nsresult rv = it->AggregatedQueryInterface(aIID, anObserver);
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if (NS_FAILED(rv)) {
delete it;
return rv;
}
return rv;
}
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nsObserver::nsObserver(nsISupports* outer)
{
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NS_INIT_AGGREGATED(outer);
}
nsObserver::~nsObserver(void)
{
}
NS_IMETHODIMP
nsObserver::AggregatedQueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_ENSURE_ARG_POINTER(aInstancePtr);
if (aIID.Equals(NS_GET_IID(nsISupports)))
*aInstancePtr = GetInner();
else if(aIID.Equals(NS_GET_IID(nsIObserver)))
*aInstancePtr = NS_STATIC_CAST(nsIObserver*, this);
else {
*aInstancePtr = nsnull;
return NS_NOINTERFACE;
}
NS_ADDREF((nsISupports*)*aInstancePtr);
return NS_OK;
}
NS_IMETHODIMP
nsObserver::Observe( nsISupports *, const char *, const PRUnichar * ) {
nsresult rv = NS_OK;
return rv;
}
////////////////////////////////////////////////////////////////////////////////