mirror of
https://github.com/rn10950/RetroZilla.git
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296 lines
9.5 KiB
C++
296 lines
9.5 KiB
C++
/* -*- 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) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Darin Fisher <darin@netscape.com> (original author)
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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 the GNU General Public License Version 2 or later (the "GPL"), or
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* 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 "nsStreamObserverProxy.h"
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#include "nsIGenericFactory.h"
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#include "nsIServiceManager.h"
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#include "nsIEventQueueService.h"
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#include "nsString.h"
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#if defined(PR_LOGGING)
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PRLogModuleInfo *gStreamProxyLog;
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#endif
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#define LOG(args) PR_LOG(gStreamProxyLog, PR_LOG_DEBUG, args)
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static NS_DEFINE_CID(kEventQueueService, NS_EVENTQUEUESERVICE_CID);
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//
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//----------------------------------------------------------------------------
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// nsStreamObserverEvent implementation...
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//----------------------------------------------------------------------------
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//
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nsStreamObserverEvent::nsStreamObserverEvent(nsStreamProxyBase *aProxy,
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nsIRequest *aRequest,
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nsISupports *aContext)
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: mProxy(aProxy)
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, mRequest(aRequest)
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, mContext(aContext)
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{
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NS_IF_ADDREF(mProxy);
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}
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nsStreamObserverEvent::~nsStreamObserverEvent()
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{
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NS_IF_RELEASE(mProxy);
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}
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nsresult
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nsStreamObserverEvent::FireEvent(nsIEventQueue *aEventQ)
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{
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NS_PRECONDITION(aEventQ, "null event queue");
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PL_InitEvent(&mEvent, nsnull,
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(PLHandleEventProc) nsStreamObserverEvent::HandlePLEvent,
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(PLDestroyEventProc) nsStreamObserverEvent::DestroyPLEvent);
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PRStatus status = aEventQ->PostEvent(&mEvent);
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return status == PR_SUCCESS ? NS_OK : NS_ERROR_FAILURE;
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}
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void PR_CALLBACK
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nsStreamObserverEvent::HandlePLEvent(PLEvent *aEvent)
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{
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nsStreamObserverEvent *ev = GET_STREAM_OBSERVER_EVENT(aEvent);
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NS_ASSERTION(ev, "null event");
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// Pass control the real event handler
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if (ev)
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ev->HandleEvent();
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}
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void PR_CALLBACK
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nsStreamObserverEvent::DestroyPLEvent(PLEvent *aEvent)
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{
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nsStreamObserverEvent *ev = GET_STREAM_OBSERVER_EVENT(aEvent);
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NS_ASSERTION(ev, "null event");
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delete ev;
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}
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//
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//----------------------------------------------------------------------------
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// nsOnStartRequestEvent internal class...
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//----------------------------------------------------------------------------
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//
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class nsOnStartRequestEvent : public nsStreamObserverEvent
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{
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public:
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nsOnStartRequestEvent(nsStreamProxyBase *aProxy,
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nsIRequest *aRequest,
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nsISupports *aContext)
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: nsStreamObserverEvent(aProxy, aRequest, aContext)
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{
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MOZ_COUNT_CTOR(nsOnStartRequestEvent);
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}
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~nsOnStartRequestEvent()
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{
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MOZ_COUNT_DTOR(nsOnStartRequestEvent);
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}
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NS_IMETHOD HandleEvent();
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};
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NS_IMETHODIMP
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nsOnStartRequestEvent::HandleEvent()
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{
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LOG(("nsOnStartRequestEvent: HandleEvent [event=%x req=%x]\n",
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this, mRequest.get()));
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nsCOMPtr<nsIStreamObserver> observer = mProxy->GetReceiver();
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if (!observer) {
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LOG(("nsOnStartRequestEvent: Already called OnStopRequest (observer is NULL)\n"));
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return NS_ERROR_FAILURE;
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}
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nsresult rv = observer->OnStartRequest(mRequest, mContext);
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if (NS_FAILED(rv)) {
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LOG(("OnStartRequest failed [rv=%x] canceling request!\n", rv));
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mRequest->Cancel(rv);
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}
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return rv;
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}
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//
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//----------------------------------------------------------------------------
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// nsOnStopRequestEvent internal class...
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//----------------------------------------------------------------------------
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//
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class nsOnStopRequestEvent : public nsStreamObserverEvent
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{
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public:
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nsOnStopRequestEvent(nsStreamProxyBase *aProxy,
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nsIRequest *aRequest, nsISupports *aContext,
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nsresult aStatus, const PRUnichar *aStatusText)
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: nsStreamObserverEvent(aProxy, aRequest, aContext)
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, mStatus(aStatus)
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, mStatusText(aStatusText)
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{
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MOZ_COUNT_CTOR(nsOnStopRequestEvent);
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}
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~nsOnStopRequestEvent()
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{
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MOZ_COUNT_DTOR(nsOnStopRequestEvent);
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}
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NS_IMETHOD HandleEvent();
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protected:
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nsresult mStatus;
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nsString mStatusText;
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};
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NS_IMETHODIMP
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nsOnStopRequestEvent::HandleEvent()
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{
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LOG(("nsOnStopRequestEvent: HandleEvent [event=%x req=%x]\n",
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this, mRequest.get()));
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nsCOMPtr<nsIStreamObserver> observer = mProxy->GetReceiver();
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if (!observer) {
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LOG(("nsOnStopRequestEvent: Already called OnStopRequest (observer is NULL)\n"));
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return NS_ERROR_FAILURE;
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}
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//
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// Do not allow any more events to be handled after OnStopRequest
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//
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mProxy->SetReceiver(nsnull);
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return observer->OnStopRequest(mRequest,
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mContext,
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mStatus,
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mStatusText.get());
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}
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//
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//----------------------------------------------------------------------------
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// nsStreamProxyBase: nsISupports implementation...
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//----------------------------------------------------------------------------
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//
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NS_IMPL_THREADSAFE_ISUPPORTS1(nsStreamProxyBase,
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nsIStreamObserver)
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//
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//----------------------------------------------------------------------------
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// nsStreamProxyBase: nsIStreamObserver implementation...
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//----------------------------------------------------------------------------
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//
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NS_IMETHODIMP
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nsStreamProxyBase::OnStartRequest(nsIRequest *aRequest,
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nsISupports *aContext)
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{
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LOG(("nsStreamProxyBase: OnStartRequest [this=%x req=%x]\n", this, aRequest));
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nsOnStartRequestEvent *ev =
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new nsOnStartRequestEvent(this, aRequest, aContext);
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if (!ev)
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return NS_ERROR_OUT_OF_MEMORY;
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nsresult rv = ev->FireEvent(GetEventQueue());
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if (NS_FAILED(rv))
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delete ev;
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return rv;
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}
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NS_IMETHODIMP
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nsStreamProxyBase::OnStopRequest(nsIRequest *aRequest,
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nsISupports *aContext,
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nsresult aStatus,
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const PRUnichar *aStatusText)
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{
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LOG(("nsStreamProxyBase: OnStopRequest [this=%x req=%x status=%x]\n",
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this, aRequest, aStatus));
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nsOnStopRequestEvent *ev =
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new nsOnStopRequestEvent(this, aRequest, aContext, aStatus, aStatusText);
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if (!ev)
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return NS_ERROR_OUT_OF_MEMORY;
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nsresult rv = ev->FireEvent(GetEventQueue());
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if (NS_FAILED(rv))
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delete ev;
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return rv;
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}
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//
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//----------------------------------------------------------------------------
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// nsStreamProxyBase: implementation...
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//----------------------------------------------------------------------------
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//
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nsresult
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nsStreamProxyBase::SetEventQueue(nsIEventQueue *aEventQ)
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{
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#if defined(PR_LOGGING)
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if (!gStreamProxyLog)
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gStreamProxyLog = PR_NewLogModule("nsStreamProxy");
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#endif
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nsresult rv = NS_OK;
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if ((aEventQ == NS_CURRENT_EVENTQ) || (aEventQ == NS_UI_THREAD_EVENTQ)) {
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nsCOMPtr<nsIEventQueueService> serv =
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do_GetService(kEventQueueService, &rv);
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if (NS_FAILED(rv))
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return rv;
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rv = serv->GetSpecialEventQueue((PRInt32) aEventQ,
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getter_AddRefs(mEventQ));
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} else
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mEventQ = aEventQ;
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return rv;
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}
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//
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//----------------------------------------------------------------------------
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// nsStreamObserverProxy: nsISupports implementation...
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//----------------------------------------------------------------------------
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//
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NS_IMPL_ISUPPORTS_INHERITED1(nsStreamObserverProxy,
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nsStreamProxyBase,
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nsIStreamObserverProxy)
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//
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//----------------------------------------------------------------------------
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// nsStreamObserverProxy: nsIStreamObserverProxy implementation...
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//----------------------------------------------------------------------------
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//
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NS_IMETHODIMP
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nsStreamObserverProxy::Init(nsIStreamObserver *aObserver,
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nsIEventQueue *aEventQ)
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{
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NS_PRECONDITION(aObserver, "null observer");
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SetReceiver(aObserver);
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return SetEventQueue(aEventQ);
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}
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