181 lines
4.6 KiB
C++
181 lines
4.6 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 "nscore.h"
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#include "nsIFactory.h"
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#include "nsISupports.h"
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#include "nsViewsCID.h"
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#include "nsView.h"
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#include "nsViewManager.h"
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#include "nsScrollingView.h"
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static NS_DEFINE_IID(kCViewManager, NS_VIEW_MANAGER_CID);
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static NS_DEFINE_IID(kCView, NS_VIEW_CID);
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static NS_DEFINE_IID(kCScrollingView, NS_SCROLLING_VIEW_CID);
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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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class nsViewFactory : public nsIFactory
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{
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public:
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// nsISupports methods
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NS_IMETHOD QueryInterface(const nsIID &aIID,
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void **aResult);
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NS_IMETHOD_(nsrefcnt) AddRef(void);
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NS_IMETHOD_(nsrefcnt) Release(void);
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// nsIFactory methods
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NS_IMETHOD CreateInstance(nsISupports *aOuter,
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const nsIID &aIID,
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void **aResult);
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NS_IMETHOD LockFactory(PRBool aLock);
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nsViewFactory(const nsCID &aClass);
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protected:
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virtual ~nsViewFactory();
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private:
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nsrefcnt mRefCnt;
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nsCID mClassID;
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};
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nsViewFactory::nsViewFactory(const nsCID &aClass)
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{
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mRefCnt = 0;
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mClassID = aClass;
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}
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nsViewFactory::~nsViewFactory()
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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 nsViewFactory::QueryInterface(const nsIID &aIID,
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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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}
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// Always NULL result, in case of failure
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*aResult = NULL;
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if (aIID.Equals(kISupportsIID)) {
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*aResult = (void *)(nsISupports*)this;
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} else if (aIID.Equals(kIFactoryIID)) {
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*aResult = (void *)(nsIFactory*)this;
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}
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if (*aResult == NULL) {
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return NS_NOINTERFACE;
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}
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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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nsrefcnt nsViewFactory::AddRef()
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{
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return ++mRefCnt;
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}
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nsrefcnt nsViewFactory::Release()
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{
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if (--mRefCnt == 0) {
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delete this;
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return 0; // Don't access mRefCnt after deleting!
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}
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return mRefCnt;
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}
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nsresult nsViewFactory::CreateInstance(nsISupports *aOuter,
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const nsIID &aIID,
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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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}
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*aResult = NULL;
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nsISupports *inst = nsnull;
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if (mClassID.Equals(kCViewManager)) {
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inst = (nsISupports *)new nsViewManager();
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}
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else if (mClassID.Equals(kCView)) {
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inst = (nsISupports *)new nsView();
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}
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else if (mClassID.Equals(kCScrollingView)) {
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inst = (nsISupports *)(nsView*)new nsScrollingView();
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}
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if (inst == NULL) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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nsresult res = inst->QueryInterface(aIID, aResult);
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if (res != NS_OK) {
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// We didn't get the right interface, so clean up
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delete inst;
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}
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return res;
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}
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nsresult nsViewFactory::LockFactory(PRBool aLock)
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{
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// Not implemented in simplest case.
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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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#if defined(XP_MAC) && defined(MAC_STATIC)
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extern "C" NS_VIEW nsresult
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NSGetFactory_VIEW_DLL(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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#else
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extern "C" NS_VIEW nsresult
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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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#endif
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{
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if (nsnull == aFactory) {
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return NS_ERROR_NULL_POINTER;
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}
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*aFactory = new nsViewFactory(aClass);
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if (nsnull == aFactory) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return (*aFactory)->QueryInterface(kIFactoryIID, (void**)aFactory);
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}
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