112 lines
4.0 KiB
Plaintext
112 lines
4.0 KiB
Plaintext
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsISupports.idl"
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interface nsIObserver;
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interface nsISimpleEnumerator;
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/**
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* nsIObserverService
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*
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* Service allows a client listener (nsIObserver) to register and unregister for
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* notifications of specific string referenced topic. Service also provides a
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* way to notify registered listeners and a way to enumerate registered client
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* listeners.
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*
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* @status FROZEN
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*/
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[scriptable, uuid(D07F5192-E3D1-11d2-8ACD-00105A1B8860)]
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interface nsIObserverService : nsISupports
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{
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/**
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* AddObserver
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*
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* Registers a given listener for a notifications regarding the specified
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* topic.
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*
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* @param anObserve : The interface pointer which will receive notifications.
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* @param aTopic : The notification topic or subject.
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* @param ownsWeak : If set to false, the nsIObserverService will hold a
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* strong reference to |anObserver|. If set to true and
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* |anObserver| supports the nsIWeakReference interface,
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* a weak reference will be held. Otherwise an error will be
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* returned.
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*/
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void addObserver( in nsIObserver anObserver, in string aTopic, in boolean ownsWeak);
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/**
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* removeObserver
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*
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* Unregisters a given listener from notifications regarding the specified
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* topic.
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*
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* @param anObserver : The interface pointer which will stop recieving
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* notifications.
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* @param aTopic : The notification topic or subject.
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*/
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void removeObserver( in nsIObserver anObserver, in string aTopic );
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/**
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* notifyObservers
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*
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* Notifies all registered listeners of the given topic.
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*
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* @param aSubject : Notification specific interface pointer.
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* @param aTopic : The notification topic or subject.
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* @param someData : Notification specific wide string.
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*/
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void notifyObservers( in nsISupports aSubject,
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in string aTopic,
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in wstring someData );
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/**
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* enumerateObservers
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*
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* Returns an enumeration of all registered listeners.
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*
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* @param aTopic : The notification topic or subject.
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*/
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nsISimpleEnumerator enumerateObservers( in string aTopic );
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};
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