windows-nt/Source/XPSP1/NT/shell/themes/themeui/classfactory.cpp

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2020-09-26 03:20:57 -05:00
/*****************************************************************************\
FILE: classfactory.cpp
DESCRIPTION:
This file will be the Class Factory.
BryanSt 4/4/2000 (Bryan Starbuck)
Copyright (C) Microsoft Corp 2000-2000. All rights reserved.
\*****************************************************************************/
#include "priv.h"
#include "classfactory.h"
#include "EffectsBasePg.h"
#include "ScreenSaverPg.h"
#include "store.h"
/*****************************************************************************
*
* CClassFactory
*
*
*****************************************************************************/
HRESULT CSettingsPage_CreateInstance(IN IUnknown * punkOuter, IN REFIID riid, OUT LPVOID * ppvObj);
HRESULT CDisplaySettings_CreateInstance(IN IUnknown * punkOuter, IN REFIID riid, OUT LPVOID * ppvObj);
HRESULT CScreenResFixer_CreateInstance(IN IUnknown * punkOuter, IN REFIID riid, OUT LPVOID * ppvObj);
class CClassFactory : public IClassFactory
{
public:
//////////////////////////////////////////////////////
// Public Interfaces
//////////////////////////////////////////////////////
// *** IUnknown ***
virtual STDMETHODIMP_(ULONG) AddRef(void);
virtual STDMETHODIMP_(ULONG) Release(void);
virtual STDMETHODIMP QueryInterface(REFIID riid, LPVOID * ppvObj);
// *** IClassFactory ***
virtual STDMETHODIMP CreateInstance(IUnknown *pUnkOuter, REFIID riid, void **ppvObject);
virtual STDMETHODIMP LockServer(BOOL fLock);
public:
CClassFactory(REFCLSID rclsid);
~CClassFactory(void);
// Friend Functions
friend HRESULT CClassFactory_Create(REFCLSID rclsid, REFIID riid, LPVOID * ppvObj);
protected:
long m_cRef;
CLSID m_rclsid;
};
/*****************************************************************************
* IClassFactory::CreateInstance
*****************************************************************************/
HRESULT CClassFactory::CreateInstance(IUnknown * punkOuter, REFIID riid, LPVOID * ppvObj)
{
HRESULT hr = E_INVALIDARG;
if (NULL != ppvObj)
{
if (!punkOuter)
{
if (IsEqualCLSID(m_rclsid, CLSID_ThemeManager))
{
hr = CThemeManager_CreateInstance(punkOuter, riid, ppvObj);
}
else if (IsEqualCLSID(m_rclsid, CLSID_ThemeUIPages))
{
hr = CThemeUIPages_CreateInstance(punkOuter, riid, ppvObj);
}
else if (IsEqualCLSID(m_rclsid, CLSID_ThemePreview))
{
hr = CThemePreview_CreateInstance(punkOuter, riid, ppvObj);
}
else if (IsEqualCLSID(m_rclsid, CLSID_EffectsPage))
{
hr = CEffectsBasePage_CreateInstance(punkOuter, riid, ppvObj);
}
else if (IsEqualCLSID(m_rclsid, CLSID_SettingsPage))
{
hr = CSettingsPage_CreateInstance(punkOuter, riid, ppvObj);
}
else if (IsEqualCLSID(m_rclsid, CLSID_DisplaySettings))
{
hr = CDisplaySettings_CreateInstance(punkOuter, riid, ppvObj);
}
else if (IsEqualCLSID(m_rclsid, CLSID_ScreenResFixer))
{
hr = CScreenResFixer_CreateInstance(punkOuter, riid, ppvObj);
}
else if (IsEqualCLSID(m_rclsid, CLSID_ScreenSaverPage))
{
hr = CScreenSaverPage_CreateInstance(punkOuter, riid, ppvObj);
}
else
{
TCHAR szGuid[GUIDSTR_MAX];
SHStringFromGUID(m_rclsid, szGuid, ARRAYSIZE(szGuid));
AssertMsg(0, TEXT("CClassFactory::CreateInstance(%s) failed because we don't support that CLSID. This is because someone made a registration bug."), szGuid); // What are you looking for?
hr = E_NOINTERFACE;
}
}
else
{ // Does anybody support aggregation any more?
hr = ResultFromScode(CLASS_E_NOAGGREGATION);
}
}
return hr;
}
/*****************************************************************************
*
* IClassFactory::LockServer
*
* What a poor function. Locking the server is identical to
* creating an object and not releasing it until you want to unlock
* the server.
*
*****************************************************************************/
HRESULT CClassFactory::LockServer(BOOL fLock)
{
if (fLock)
DllAddRef();
else
DllRelease();
return S_OK;
}
/*****************************************************************************
*
* CClassFactory_Create
*
*****************************************************************************/
/****************************************************\
Constructor
\****************************************************/
CClassFactory::CClassFactory(REFCLSID rclsid) : m_cRef(1)
{
m_rclsid = rclsid;
DllAddRef();
}
/****************************************************\
Destructor
\****************************************************/
CClassFactory::~CClassFactory()
{
DllRelease();
}
//===========================
// *** IUnknown Interface ***
//===========================
ULONG CClassFactory::AddRef()
{
return InterlockedIncrement(&m_cRef);
}
ULONG CClassFactory::Release()
{
if (InterlockedDecrement(&m_cRef))
return m_cRef;
delete this;
return 0;
}
HRESULT CClassFactory::QueryInterface(REFIID riid, void **ppvObj)
{
if (IsEqualCLSID(riid, IID_IUnknown) || IsEqualCLSID(riid, IID_IClassFactory))
{
*ppvObj = SAFECAST(this, IClassFactory *);
}
else
{
TraceMsg(TF_WMTHEME, "CClassFactory::QueryInterface() failed.");
*ppvObj = NULL;
return E_NOINTERFACE;
}
AddRef();
return S_OK;
}
HRESULT CClassFactory_Create(REFCLSID rclsid, REFIID riid, LPVOID * ppvObj)
{
HRESULT hres;
if (IsEqualCLSID(riid, IID_IClassFactory))
{
*ppvObj = (LPVOID) new CClassFactory(rclsid);
hres = (*ppvObj) ? S_OK : E_OUTOFMEMORY;
}
else
hres = ResultFromScode(E_NOINTERFACE);
return hres;
}