gecko-dev/xpcom/ds/nsIObserver.idl

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* 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 Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#include "nsISupports.idl"
/**
* This interface is implemented by an object that needs
* to observe an event corresponding to a change in a
* topic for a subject.
*/
[scriptable, uuid(DB242E01-E4D9-11d2-9DDE-000064657374)]
interface nsIObserver : nsISupports {
/**
* Called if the topic changes for the subject. If you expect
* multiple topics/subjects, the impl is responsible for filtering.
*
* @param aSubject - the event specific data that has changed.
* @param aTopic - indicates the event that has changed.
* @param aData - out of band data specific to the topic/
* subject event.
*/
void Observe( in nsISupports aSubject,
in wstring aTopic,
in wstring aData );
};
%{C++
#define NS_OBSERVER_CONTRACTID "@mozilla.org/xpcom/observer;1"
#define NS_OBSERVER_CLASSNAME "Observer"
%}