windows-server-2003/windows/advcore/ctf/msutb/clsfact.cpp

/**************************************************************************
   THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
   ANY KIND, EITHER EXPRESSED OR TFPLIED, INCLUDING BUT NOT LIMITED TO
   THE TFPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
   PARTICULAR PURPOSE.

   Copyright 1997 Microsoft Corporation.  All Rights Reserved.
**************************************************************************/

/**************************************************************************

   File:          ClsFact.cpp
   
   Description:   Implements CClassFactory.

**************************************************************************/

/**************************************************************************
   include statements
**************************************************************************/

#include "private.h"
#include "ClsFact.h"
#include "Guid.h"
#include <shlapip.h>

/**************************************************************************
   private function prototypes
**************************************************************************/

/**************************************************************************
   global variables
**************************************************************************/

///////////////////////////////////////////////////////////////////////////
//
// IClassFactory implementation
//

/**************************************************************************

   CClassFactory::CClassFactory

**************************************************************************/

CClassFactory::CClassFactory(CLSID clsid)
{
    Dbg_MemSetThisName(TEXT("CClassFactory"));

    m_clsidObject = clsid;
    m_ObjRefCount = 1;
    g_DllRefCount++;
}

/**************************************************************************

   CClassFactory::~CClassFactory

**************************************************************************/

CClassFactory::~CClassFactory()
{
    g_DllRefCount--;
}

/**************************************************************************

   CClassFactory::QueryInterface

**************************************************************************/

STDMETHODIMP CClassFactory::QueryInterface(REFIID riid, LPVOID *ppReturn)
{
    *ppReturn = NULL;

    if(IsEqualIID(riid, IID_IUnknown))
    {
        *ppReturn = this;
    }
    else if(IsEqualIID(riid, IID_IClassFactory))
    {
        *ppReturn = (IClassFactory*)this;
    }   

    if(*ppReturn)
    {
        (*(LPUNKNOWN*)ppReturn)->AddRef();
        return S_OK;
    }

    return E_NOINTERFACE;
}                                             

/**************************************************************************

   CClassFactory::AddRef

**************************************************************************/

STDMETHODIMP_(DWORD) CClassFactory::AddRef()
{
    return ++m_ObjRefCount;
}


/**************************************************************************

   CClassFactory::Release

**************************************************************************/

STDMETHODIMP_(DWORD) CClassFactory::Release()
{
    if (--m_ObjRefCount == 0)
    {
        delete this;
        return 0;
    }
   
    return m_ObjRefCount;
}

/**************************************************************************

   CClassFactory::CreateInstance

**************************************************************************/

const TCHAR c_szCicLoaderWndClass[] = TEXT("CicLoaderWndClass");

STDMETHODIMP CClassFactory::CreateInstance(  LPUNKNOWN pUnknown, 
                                             REFIID riid, 
                                             LPVOID *ppObject)
{
    //
    // Look up disabling Text Services status from the registry.
    // If it is disabled, return fail not to support language deskband.
    //
    if (IsDisabledTextServices())
    {
        return E_FAIL;
    }

    HRESULT  hResult = E_FAIL;
    LPVOID   pTemp = NULL;

    *ppObject = NULL;

    if(pUnknown != NULL)
       return CLASS_E_NOAGGREGATION;

    //create the proper object
    if (IsEqualCLSID(m_clsidObject, CLSID_MSUTBDeskBand))
    {
        CDeskBand *pDeskBand = new CDeskBand();
        if(NULL == pDeskBand)
           return E_OUTOFMEMORY;
    
        pTemp = pDeskBand;
    }
  
  
    if(pTemp)
    {
        //get the QueryInterface return for our return value
        hResult = ((LPUNKNOWN)pTemp)->QueryInterface(riid, ppObject);
 
        //call Release to decement the ref count
        ((LPUNKNOWN)pTemp)->Release();
    }

    return hResult;
}

/**************************************************************************

   CClassFactory::LockServer

**************************************************************************/

STDMETHODIMP CClassFactory::LockServer(BOOL)
{
    return E_NOTIMPL;
}