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103 lines
3.8 KiB
C++
103 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 Communicator client 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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#ifndef nsPIEventQueueChain_h__
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#define nsPIEventQueueChain_h__
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#include "nsISupports.h"
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// {8f310040-82a7-11d3-95bc-0060083a0bcf}
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#define NS_IEVENTQUEUECHAIN_IID \
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{ 0x8f310040, 0x82a7, 0x11d3, { 0x95, 0xbc, 0x0, 0x60, 0x8, 0x3a, 0xb, 0xcf } }
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class nsIEventQueue;
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class nsPIEventQueueChain : public nsISupports
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{
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public:
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NS_DEFINE_STATIC_IID_ACCESSOR(NS_IEVENTQUEUECHAIN_IID);
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/**
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* Add the given queue as the new youngest member of our chain.
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* It will not be addrefed.
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* @param aQueue the queue. must not be null.
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* @return error indication
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*/
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NS_IMETHOD AppendQueue(nsIEventQueue *aQueue) = 0;
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/**
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* Remove this element from the chain.
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* @return NS_OK
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*/
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NS_IMETHOD Unlink() = 0;
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/**
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* Fetch (and addref) the youngest member of the chain.
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* @param *aQueue the youngest queue. aQueue must not be null.
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* @return error indication
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*/
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NS_IMETHOD GetYoungest(nsIEventQueue **aQueue) = 0;
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/**
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* Fetch (and addref) the youngest member of the chain which is
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* still accepting events. Note that there may be still younger
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* queues which still contain events in need of processing but
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* have already stopped accepting new events.
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*
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* @param *aQueue the youngest such queue. aQueue must not be null.
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* *aQueue will be returned null, if no such queue is found.
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* @return error indication -- can be NS_OK even if *aQueue is 0
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*/
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NS_IMETHOD GetYoungestActive(nsIEventQueue **aQueue) = 0;
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NS_IMETHOD SetYounger(nsPIEventQueueChain *aQueue) = 0;
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NS_IMETHOD GetYounger(nsIEventQueue **aQueue) = 0;
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NS_IMETHOD SetElder(nsPIEventQueueChain *aQueue) = 0;
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NS_IMETHOD GetElder(nsIEventQueue **aQueue) = 0;
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/**
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* Revoke events for aOwner in this queue and all elder queues. This
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* differs in behavior from nsIEventQueue::RevokeEvents in that that
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* method revokes events in younger queues too.
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*/
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NS_IMETHOD RevokeEventsInternal(void* aOwner) = 0;
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};
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#endif /* nsPIEventQueueChain_h___ */
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