зеркало из https://github.com/mozilla/gecko-dev.git
105 строки
3.5 KiB
C++
105 строки
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape Communications
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* Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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*/
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#include "prmon.h"
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#include "nsIEventQueue.h"
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#include "nsPIEventQueueChain.h"
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class nsEventQueueImpl : public nsIEventQueue,
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public nsPIEventQueueChain
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{
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public:
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nsEventQueueImpl();
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virtual ~nsEventQueueImpl();
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// nsISupports interface...
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NS_DECL_ISUPPORTS
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// nsIEventQueue interface...
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NS_IMETHOD InitEvent(PLEvent* aEvent, void* owner,
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PLHandleEventProc handler,
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PLDestroyEventProc destructor);
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NS_IMETHOD_(PRStatus) PostEvent(PLEvent* aEvent);
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NS_IMETHOD PostSynchronousEvent(PLEvent* aEvent, void** aResult);
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NS_IMETHOD ProcessPendingEvents();
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NS_IMETHOD EventLoop();
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NS_IMETHOD EventAvailable(PRBool& aResult);
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NS_IMETHOD GetEvent(PLEvent** aResult);
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NS_IMETHOD HandleEvent(PLEvent* aEvent);
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NS_IMETHOD WaitForEvent(PLEvent** aResult);
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NS_IMETHOD_(PRInt32) GetEventQueueSelectFD();
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NS_IMETHOD Init(PRBool aNative);
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NS_IMETHOD InitFromPRThread(PRThread* thread, PRBool aNative);
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NS_IMETHOD InitFromPLQueue(PLEventQueue* aQueue);
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NS_IMETHOD EnterMonitor();
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NS_IMETHOD ExitMonitor();
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NS_IMETHOD RevokeEvents(void* owner);
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NS_IMETHOD GetPLEventQueue(PLEventQueue** aEventQueue);
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NS_IMETHOD IsQueueOnCurrentThread(PRBool *aResult);
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NS_IMETHOD IsQueueNative(PRBool *aResult);
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NS_IMETHOD StopAcceptingEvents();
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// Helpers
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static NS_METHOD Create(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr);
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static const nsCID& CID() { static nsCID cid = NS_EVENTQUEUE_CID; return cid; }
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// nsPIEventQueueChain interface
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NS_IMETHOD AppendQueue(nsIEventQueue *aQueue);
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NS_IMETHOD Unlink();
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NS_IMETHOD GetYoungest(nsIEventQueue **aQueue);
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NS_IMETHOD GetYoungestActive(nsIEventQueue **aQueue);
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NS_IMETHOD SetYounger(nsPIEventQueueChain *aQueue);
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NS_IMETHOD GetYounger(nsIEventQueue **aQueue);
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NS_IMETHOD SetElder(nsPIEventQueueChain *aQueue);
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NS_IMETHOD GetElder(nsIEventQueue **aQueue);
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private:
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PLEventQueue *mEventQueue;
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PRBool mAcceptingEvents, // accept new events or pass them on?
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mCouldHaveEvents; // accepting new ones, or still have old ones?
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nsCOMPtr<nsPIEventQueueChain> mElderQueue; // younger can hold on to elder
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nsPIEventQueueChain *mYoungerQueue; // but elder can't hold on to younger
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void NotifyObservers(const char *aTopic);
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void CheckForDeactivation() {
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if (mCouldHaveEvents && !mAcceptingEvents && !PL_EventAvailable(mEventQueue)) {
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mCouldHaveEvents = PR_FALSE;
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NS_RELEASE_THIS(); // balance ADDREF from the constructor
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}
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}
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};
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