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226 lines
7.1 KiB
C++
226 lines
7.1 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "msgCore.h"
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#include "nsIFactory.h"
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#include "nsISupports.h"
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#include "pratom.h"
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#include "nsMsgCompCID.h"
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/* Include all of the interfaces our factory can generate components for */
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#include "nsISmtpService.h"
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#include "nsSmtpService.h"
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#include "nsMsgComposeFact.h"
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#include "nsMsgCompFieldsFact.h"
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#include "nsMsgSendFact.h"
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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
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static NS_DEFINE_IID(kIFactoryIID, NS_IFACTORY_IID);
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static NS_DEFINE_CID(kCMsgComposeCID, NS_MSGCOMPOSE_CID);
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static NS_DEFINE_CID(kCMsgCompFieldsCID, NS_MSGCOMPFIELDS_CID);
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static NS_DEFINE_CID(kCMsgSendCID, NS_MSGSEND_CID);
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static NS_DEFINE_CID(kCSmtpServiceCID, NS_SMTPSERVICE_CID);
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////////////////////////////////////////////////////////////
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//
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////////////////////////////////////////////////////////////
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static PRInt32 g_InstanceCount = 0;
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static PRInt32 g_LockCount = 0;
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class nsMsgComposeFactory : public nsIFactory
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{
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public:
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// nsISupports methods
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NS_DECL_ISUPPORTS
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nsMsgComposeFactory(const nsCID &aClass);
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// nsIFactory methods
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NS_IMETHOD CreateInstance(nsISupports *aOuter, const nsIID &aIID, void **aResult);
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NS_IMETHOD LockFactory(PRBool aLock);
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protected:
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virtual ~nsMsgComposeFactory();
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private:
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nsCID mClassID;
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};
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nsMsgComposeFactory::nsMsgComposeFactory(const nsCID &aClass)
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{
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NS_INIT_REFCNT();
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mClassID = aClass;
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}
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nsMsgComposeFactory::~nsMsgComposeFactory()
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{
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NS_ASSERTION(mRefCnt == 0, "non-zero refcnt at destruction");
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}
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nsresult nsMsgComposeFactory::QueryInterface(const nsIID &aIID, void **aResult)
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{
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if (aResult == NULL)
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return NS_ERROR_NULL_POINTER;
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// Always NULL result, in case of failure
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*aResult = NULL;
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// we support two interfaces....nsISupports and nsFactory.....
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if (aIID.Equals(::nsISupports::IID()))
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*aResult = (void *)(nsISupports*)this;
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else if (aIID.Equals(nsIFactory::IID()))
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*aResult = (void *)(nsIFactory*)this;
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if (*aResult == NULL)
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return NS_NOINTERFACE;
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AddRef(); // Increase reference count for caller
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return NS_OK;
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}
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NS_IMPL_ADDREF(nsMsgComposeFactory)
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NS_IMPL_RELEASE(nsMsgComposeFactory)
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nsresult nsMsgComposeFactory::CreateInstance(nsISupports *aOuter, const nsIID &aIID, void **aResult)
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{
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nsresult res = NS_OK;
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if (aResult == NULL)
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return NS_ERROR_NULL_POINTER;
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*aResult = NULL;
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nsISupports *inst = nsnull;
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// ClassID check happens here
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// Whenever you add a new class that supports an interface, plug it in here!!!
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// mscott --> I've noticed that all of the "convience" functions (NS_*) used to
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// create components are adding a ref count to the returned component...then at the end of
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// CreateInstance we ref count again when we query interface for the desired interface.
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// That's why we need to be careful and make sure we release the first ref count before returning...
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// So, if you add a component here and it doesn't ref count when you create it then you might
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// have a problem....
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if (mClassID.Equals(kCSmtpServiceCID))
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{
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nsSmtpService * smtpService = new nsSmtpService();
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// okay now turn around and give inst a handle on it....
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smtpService->QueryInterface(kISupportsIID, (void **) &inst);
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}
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// do they want an Message Compose interface ?
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if (mClassID.Equals(kCMsgComposeCID))
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{
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res = NS_NewMsgCompose((nsIMsgCompose **) &inst);
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if (res != NS_OK) // was there a problem creating the object ?
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return res;
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}
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// do they want an Message Compose Fields interface ?
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if (mClassID.Equals(kCMsgCompFieldsCID))
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{
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res = NS_NewMsgCompFields((nsIMsgCompFields **) &inst);
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if (res != NS_OK) // was there a problem creating the object ?
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return res;
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}
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// do they want an Message Send interface ?
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if (mClassID.Equals(kCMsgSendCID))
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{
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res = NS_NewMsgSend((nsIMsgSend **) &inst);
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if (res != NS_OK) // was there a problem creating the object ?
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return res;
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}
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// End of checking the interface ID code....
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if (inst)
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{
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// so we now have the class that supports the desired interface...we need to turn around and
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// query for our desired interface.....
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res = inst->QueryInterface(aIID, aResult);
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NS_RELEASE(inst); // because creating picked up an extra ref count...
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if (res != NS_OK) // if the query interface failed for some reason, then the object did not get ref counted...delete it.
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delete inst;
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}
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else
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res = NS_ERROR_OUT_OF_MEMORY;
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return res;
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}
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nsresult nsMsgComposeFactory::LockFactory(PRBool aLock)
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{
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if (aLock)
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PR_AtomicIncrement(&g_LockCount);
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else
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PR_AtomicDecrement(&g_LockCount);
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return NS_OK;
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}
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// return the proper factory to the caller.
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extern "C" NS_EXPORT nsresult NSGetFactory(nsISupports* serviceMgr,
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const nsCID &aClass,
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const char *aClassName,
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const char *aProgID,
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nsIFactory **aFactory)
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{
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if (nsnull == aFactory)
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return NS_ERROR_NULL_POINTER;
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// If we decide to implement multiple factories in the msg.dll, then we need to check the class
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// type here and create the appropriate factory instead of always creating a nsMsgComposeFactory...
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*aFactory = new nsMsgComposeFactory(aClass);
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if (aFactory)
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return (*aFactory)->QueryInterface(nsIFactory::IID(), (void**)aFactory); // they want a Factory Interface so give it to them
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else
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return NS_ERROR_OUT_OF_MEMORY;
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}
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extern "C" NS_EXPORT PRBool NSCanUnload(nsISupports* serviceMgr)
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{
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return PRBool(g_InstanceCount == 0 && g_LockCount == 0);
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}
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extern "C" NS_EXPORT nsresult NSRegisterSelf(nsISupports* serviceMgr, const char* path)
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{
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nsresult ret;
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ret = nsRepository::RegisterFactory(kCMsgComposeCID, path, PR_TRUE, PR_TRUE);
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ret = nsRepository::RegisterFactory(kCSmtpServiceCID, path, PR_TRUE, PR_TRUE);
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ret = nsRepository::RegisterFactory(kCMsgCompFieldsCID, path, PR_TRUE, PR_TRUE);
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ret = nsRepository::RegisterFactory(kCMsgSendCID, path, PR_TRUE, PR_TRUE);
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return ret;
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}
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extern "C" NS_EXPORT nsresult
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NSUnregisterSelf(nsISupports* serviceMgr, const char* path)
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{
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nsresult ret;
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ret = nsRepository::UnregisterFactory(kCMsgComposeCID, path);
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ret = nsRepository::UnregisterFactory(kCSmtpServiceCID, path);
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ret = nsRepository::UnregisterFactory(kCMsgCompFieldsCID, path);
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ret = nsRepository::UnregisterFactory(kCMsgSendCID, path);
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return ret;
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}
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