pjs/mailnews/mime/cthandlers/vcard/nsVCardFactory.cpp

217 строки
6.3 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsIFactory.h"
#include "nsISupports.h"
#include "msgCore.h"
#include "nsCOMPtr.h"
#include "pratom.h"
/* Include all of the interfaces our factory can generate components for */
#include "nsIMimeContentTypeHandler.h"
#include "nsMimeContentTypeHandler.h"
static NS_DEFINE_CID(kComponentManagerCID, NS_COMPONENTMANAGER_CID);
static NS_DEFINE_CID(kMimeContentTypeHandlerCID, NS_VCARD_CONTENT_TYPE_HANDLER_CID);
////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////
static PRInt32 g_InstanceCount = 0;
static PRInt32 g_LockCount = 0;
class nsVCardFactory : public nsIFactory
{
public:
// nsISupports methods
NS_DECL_ISUPPORTS
nsVCardFactory(const nsCID &aClass,
const char* aClassName,
const char* aProgID,
nsISupports*);
// nsIFactory methods
NS_IMETHOD CreateInstance(nsISupports *aOuter, const nsIID &aIID, void **aResult);
NS_IMETHOD LockFactory(PRBool aLock);
protected:
virtual ~nsVCardFactory();
nsCID mClassID;
char* mClassName;
char* mProgID;
nsIServiceManager* mServiceManager;
};
nsVCardFactory::nsVCardFactory(const nsCID &aClass,
const char* aClassName,
const char* aProgID,
nsISupports *compMgrSupports)
: mClassID(aClass),
mClassName(nsCRT::strdup(aClassName)),
mProgID(nsCRT::strdup(aProgID))
{
NS_INIT_REFCNT();
// store a copy of the
compMgrSupports->QueryInterface(nsIServiceManager::GetIID(),
(void **)&mServiceManager);
}
nsVCardFactory::~nsVCardFactory()
{
NS_ASSERTION(mRefCnt == 0, "non-zero refcnt at destruction");
NS_IF_RELEASE(mServiceManager);
PL_strfree(mClassName);
PL_strfree(mProgID);
}
nsresult
nsVCardFactory::QueryInterface(const nsIID &aIID, void **aResult)
{
if (aResult == NULL)
return NS_ERROR_NULL_POINTER;
// Always NULL result, in case of failure
*aResult = NULL;
// we support two interfaces....nsISupports and nsFactory.....
if (aIID.Equals(nsCOMTypeInfo<nsISupports>::GetIID()))
*aResult = (void *)(nsISupports*)this;
else if (aIID.Equals(nsIFactory::GetIID()))
*aResult = (void *)(nsIFactory*)this;
if (*aResult == NULL)
return NS_NOINTERFACE;
AddRef(); // Increase reference count for caller
return NS_OK;
}
NS_IMPL_ADDREF(nsVCardFactory)
NS_IMPL_RELEASE(nsVCardFactory)
nsresult
nsVCardFactory::CreateInstance(nsISupports *aOuter,
const nsIID &aIID,
void **aResult)
{
nsresult res = NS_OK;
if (aResult == NULL)
return NS_ERROR_NULL_POINTER;
*aResult = NULL;
nsISupports *inst = nsnull;
// ClassID check happens here
// Whenever you add a new class that supports an interface, plug it in here!!!
// do they want a mime emitter interface ?
if (mClassID.Equals(kMimeContentTypeHandlerCID))
{
res = NS_NewMimeContentTypeHandler((nsIMimeContentTypeHandler **) &inst);
if (NS_FAILED(res)) // was there a problem creating the object ?
return res;
}
// End of checking the interface ID code....
if (inst)
{
// so we now have the class that supports the desired interface...we need to turn around and
// query for our desired interface.....
res = inst->QueryInterface(aIID, aResult);
if (res != NS_OK) // if the query interface failed for some reason, then the object did not get ref counted...delete it.
delete inst;
}
else
res = NS_ERROR_OUT_OF_MEMORY;
return res;
}
nsresult
nsVCardFactory::LockFactory(PRBool aLock)
{
if (aLock)
PR_AtomicIncrement(&g_LockCount);
else
PR_AtomicDecrement(&g_LockCount);
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
// return the proper factory to the caller.
extern "C" NS_EXPORT nsresult NSGetFactory(nsISupports* aServMgr,
const nsCID &aClass,
const char *aClassName,
const char *aProgID,
nsIFactory **aFactory)
{
if (nsnull == aFactory)
return NS_ERROR_NULL_POINTER;
*aFactory = new nsVCardFactory(aClass, aClassName, aProgID, aServMgr);
if (aFactory)
return (*aFactory)->QueryInterface(nsIFactory::GetIID(),
(void**)aFactory);
else
return NS_ERROR_OUT_OF_MEMORY;
}
extern "C" NS_EXPORT PRBool NSCanUnload(nsISupports* aServMgr)
{
return PRBool(g_InstanceCount == 0 && g_LockCount == 0);
}
////////////////////////////////////////////////////////////////////////////////
extern "C" NS_EXPORT nsresult
NSRegisterSelf(nsISupports* aServMgr, const char* path)
{
nsresult rv = NS_OK;
NS_WITH_SERVICE1(nsIComponentManager, compMgr, aServMgr, kComponentManagerCID, &rv);
if (NS_FAILED(rv)) return rv;
rv = compMgr->RegisterComponent(kMimeContentTypeHandlerCID,
"MIME VCard Handler",
"mimecth:text/x-vcard",
path, PR_TRUE, PR_TRUE);
return rv;
}
extern "C" NS_EXPORT nsresult
NSUnregisterSelf(nsISupports* aServMgr, const char* path)
{
nsresult rv = NS_OK;
NS_WITH_SERVICE1(nsIComponentManager, compMgr, aServMgr, kComponentManagerCID, &rv);
if (NS_FAILED(rv)) return rv;
rv = compMgr->UnregisterComponent(kMimeContentTypeHandlerCID, path);
return rv;
}
////////////////////////////////////////////////////////////////////////////////