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nsRequestObserverProxy.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Darin Fisher <darin@netscape.com> (original author)
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either the GNU General Public License Version 2 or later (the "GPL"), or
00027  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
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00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #ifndef nsRequestObserverProxy_h__
00040 #define nsRequestObserverProxy_h__
00041 
00042 #include "nsIRequestObserver.h"
00043 #include "nsIRequestObserverProxy.h"
00044 #include "nsIEventQueue.h"
00045 #include "nsIRequest.h"
00046 #include "nsCOMPtr.h"
00047 
00048 class nsARequestObserverEvent;
00049 
00050 class nsRequestObserverProxy : public nsIRequestObserverProxy
00051 {
00052 public:
00053     NS_DECL_ISUPPORTS
00054     NS_DECL_NSIREQUESTOBSERVER
00055     NS_DECL_NSIREQUESTOBSERVERPROXY
00056 
00057     nsRequestObserverProxy() { }
00058     virtual ~nsRequestObserverProxy();
00059 
00060     nsIRequestObserver *Observer() { return mObserver; }
00061 
00062     nsresult FireEvent(nsARequestObserverEvent *);
00063     nsIEventQueue *EventQueue() { return mEventQ.get(); } // debugging aid
00064     nsresult SetEventQueue(nsIEventQueue *);
00065 
00066 protected:
00067     nsCOMPtr<nsIRequestObserver> mObserver;
00068     nsCOMPtr<nsIEventQueue>      mEventQ;
00069 
00070     friend class nsOnStartRequestEvent;
00071     friend class nsOnStopRequestEvent;
00072 };
00073 
00074 class nsARequestObserverEvent
00075 {
00076 public:
00077     nsARequestObserverEvent(nsIRequest *, nsISupports *);
00078     virtual ~nsARequestObserverEvent() {}
00079 
00080     static nsARequestObserverEvent *FromPLEvent(PLEvent *p)
00081         { return (nsARequestObserverEvent *)
00082             ( (char *) p - offsetof(nsARequestObserverEvent, mEvent) ); }
00083     PLEvent *GetPLEvent() { return &mEvent; }
00084 
00088     virtual void HandleEvent() = 0;
00089 
00090 protected:
00091     static void PR_CALLBACK HandlePLEvent(PLEvent *);
00092     static void PR_CALLBACK DestroyPLEvent(PLEvent *);
00093 
00094     PLEvent mEvent; // this _must_ be the first data member
00095 
00096     nsCOMPtr<nsIRequest>  mRequest;
00097     nsCOMPtr<nsISupports> mContext;
00098 };
00099 
00100 #endif // nsRequestObserverProxy_h__