windows-nt/Source/XPSP1/NT/printscan/ui/wiadefui/wiadefui.cpp

/*******************************************************************************
 *
 *  (C) COPYRIGHT MICROSOFT CORPORATION, 1998
 *
 *  TITLE:       WIADEFUI.CPP
 *
 *  VERSION:     1.0
 *
 *  AUTHOR:      ShaunIv
 *
 *  DATE:        5/13/1999
 *
 *  DESCRIPTION:
 *
 *******************************************************************************/
#include "precomp.h"
#pragma hdrstop
#include <initguid.h>
#include <shlguid.h>
#include <wiadevdp.h>
#include <itranhlp.h>
#include <isuppfmt.h>
#include "resource.h"
#include "wiauiext.h"
#include "uicommon.h"
#include "apdropt.h"

// DLL reference counters
static LONG g_nServerLocks = 0;
static LONG g_nComponents  = 0;

// DLL instance
HINSTANCE g_hInstance;

void DllAddRef()
{
    WIA_PUSHFUNCTION(TEXT("DllAddRef"));
    InterlockedIncrement(&g_nComponents);
}

void DllRelease()
{
    WIA_PUSHFUNCTION(TEXT("DllRelease"));
    InterlockedDecrement(&g_nComponents);
}


class CWiaDefaultUiClassFactory : public IClassFactory
{
private:
    LONG   m_cRef;

public:
    // IUnknown
    STDMETHODIMP QueryInterface( const IID &iid, void **ppv);
    STDMETHODIMP_(ULONG) AddRef(void);
    STDMETHODIMP_(ULONG) Release(void);

    // IClassFactory
    STDMETHODIMP CreateInstance( IUnknown *pUnknownOuter, const IID &iid, void **ppvObject );
    STDMETHODIMP LockServer( BOOL bLock );

    CWiaDefaultUiClassFactory()
    : m_cRef(1)
    {
        WIA_PUSHFUNCTION(TEXT("CWiaDefaultUiClassFactory::CWiaDefaultUiClassFactory"));
    }
    ~CWiaDefaultUiClassFactory(void)
    {
        WIA_PUSHFUNCTION(TEXT("CWiaDefaultUiClassFactory::~CWiaDefaultUiClassFactory"));
    }
};



STDMETHODIMP CWiaDefaultUiClassFactory::QueryInterface( const IID &iid, void **ppvObject )
{
    WIA_PUSHFUNCTION(TEXT("CWiaDefaultUiClassFactory::QueryInterface"));

    if ((iid==IID_IUnknown) || (iid==IID_IClassFactory))
    {
        *ppvObject = static_cast<LPVOID>(this);
    }
    else
    {
        *ppvObject = NULL;
        return(E_NOINTERFACE);
    }
    reinterpret_cast<IUnknown*>(*ppvObject)->AddRef();
    return(S_OK);
}


STDMETHODIMP_(ULONG) CWiaDefaultUiClassFactory::AddRef(void)
{
    WIA_PUSHFUNCTION(TEXT("CWiaDefaultUiClassFactory::AddRef"));
    return(InterlockedIncrement(&m_cRef));
}


STDMETHODIMP_(ULONG) CWiaDefaultUiClassFactory::Release(void)
{
    WIA_PUSHFUNCTION(TEXT("CWiaDefaultUiClassFactory::Release"));
    if (InterlockedDecrement(&m_cRef)==0)
    {
        delete this;
        return 0;
    }
    return(m_cRef);
}


STDMETHODIMP CWiaDefaultUiClassFactory::CreateInstance( IUnknown *pUnknownOuter, const IID &iid, void **ppvObject )
{
    WIA_PUSHFUNCTION(TEXT("CWiaDefaultUiClassFactory::CreateInstance"));

    //
    // No aggregation supported
    //
    if (pUnknownOuter)
    {
        return(CLASS_E_NOAGGREGATION);
    }

    CWiaDefaultUI *pWiaUIExtension = new CWiaDefaultUI();
    if (!pWiaUIExtension)
    {
        return(E_OUTOFMEMORY);
    }

    HRESULT hr = pWiaUIExtension->QueryInterface( iid, ppvObject );

    pWiaUIExtension->Release();

    return (hr);
}

STDMETHODIMP CWiaDefaultUiClassFactory::LockServer(BOOL bLock)
{
    WIA_PUSHFUNCTION(TEXT("CWiaDefaultUiClassFactory::LockServer"));
    if (bLock)
    {
        InterlockedIncrement(&g_nServerLocks);
    }
    else
    {
        InterlockedDecrement(&g_nServerLocks);
    }
    return(S_OK);
}


class CWiaAutoPlayDropTargetClassFactory : public IClassFactory
{
private:
    LONG   m_cRef;

public:
    // IUnknown
    STDMETHODIMP QueryInterface( const IID &iid, void **ppv);
    STDMETHODIMP_(ULONG) AddRef(void);
    STDMETHODIMP_(ULONG) Release(void);

    // IClassFactory
    STDMETHODIMP CreateInstance( IUnknown *pUnknownOuter, const IID &iid, void **ppvObject );
    STDMETHODIMP LockServer( BOOL bLock );

    CWiaAutoPlayDropTargetClassFactory()
    : m_cRef(1)
    {
        WIA_PUSHFUNCTION(TEXT("CWiaAutoPlayDropTargetClassFactory::CWiaAutoPlayDropTargetClassFactory"));
    }
    ~CWiaAutoPlayDropTargetClassFactory(void)
    {
        WIA_PUSHFUNCTION(TEXT("CWiaAutoPlayDropTargetClassFactory::~CWiaAutoPlayDropTargetClassFactory"));
    }
};



STDMETHODIMP CWiaAutoPlayDropTargetClassFactory::QueryInterface( const IID &iid, void **ppvObject )
{
    WIA_PUSHFUNCTION(TEXT("CWiaAutoPlayDropTargetClassFactory::QueryInterface"));

    if ((iid==IID_IUnknown) || (iid==IID_IClassFactory))
    {
        *ppvObject = static_cast<LPVOID>(this);
    }
    else
    {
        *ppvObject = NULL;
        return(E_NOINTERFACE);
    }
    reinterpret_cast<IUnknown*>(*ppvObject)->AddRef();
    return(S_OK);
}


STDMETHODIMP_(ULONG) CWiaAutoPlayDropTargetClassFactory::AddRef(void)
{
    WIA_PUSHFUNCTION(TEXT("CWiaAutoPlayDropTargetClassFactory::AddRef"));
    return(InterlockedIncrement(&m_cRef));
}


STDMETHODIMP_(ULONG) CWiaAutoPlayDropTargetClassFactory::Release(void)
{
    WIA_PUSHFUNCTION(TEXT("CWiaAutoPlayDropTargetClassFactory::Release"));
    if (InterlockedDecrement(&m_cRef)==0)
    {
        delete this;
        return 0;
    }
    return(m_cRef);
}


STDMETHODIMP CWiaAutoPlayDropTargetClassFactory::CreateInstance( IUnknown *pUnknownOuter, const IID &iid, void **ppvObject )
{
    WIA_PUSHFUNCTION(TEXT("CWiaAutoPlayDropTargetClassFactory::CreateInstance"));

    //
    // No aggregation supported
    //
    if (pUnknownOuter)
    {
        return(CLASS_E_NOAGGREGATION);
    }

    CWiaAutoPlayDropTarget *pWiaAutoPlayDropTarget = new CWiaAutoPlayDropTarget();
    if (!pWiaAutoPlayDropTarget)
    {
        return(E_OUTOFMEMORY);
    }

    HRESULT hr = pWiaAutoPlayDropTarget->QueryInterface( iid, ppvObject );

    pWiaAutoPlayDropTarget->Release();

    return (hr);
}

STDMETHODIMP CWiaAutoPlayDropTargetClassFactory::LockServer(BOOL bLock)
{
    WIA_PUSHFUNCTION(TEXT("CWiaAutoPlayDropTargetClassFactory::LockServer"));
    if (bLock)
    {
        InterlockedIncrement(&g_nServerLocks);
    }
    else
    {
        InterlockedDecrement(&g_nServerLocks);
    }
    return(S_OK);
}


extern "C" BOOL WINAPI DllMain( HINSTANCE hinst, DWORD dwReason, LPVOID lpReserved )
{
    switch (dwReason)
    {
    case DLL_PROCESS_ATTACH:
        SHFusionInitializeFromModuleID( hinst, 123 );
        g_hInstance = hinst;
        DisableThreadLibraryCalls(hinst);
        WIA_DEBUG_CREATE(hinst);
        break;

    case DLL_PROCESS_DETACH:
        SHFusionUninitialize();
        WIA_REPORT_LEAKS();
        WIA_DEBUG_DESTROY();
        break;
    }
    return(TRUE);
}


extern "C" STDMETHODIMP DllRegisterServer(void)
{
    return WiaUiUtil::InstallInfFromResource( g_hInstance, "RegDllCommon" );
}

extern "C" STDMETHODIMP DllUnregisterServer(void)
{
    return WiaUiUtil::InstallInfFromResource( g_hInstance, "UnregDllCommon" );
}

extern "C" STDMETHODIMP DllCanUnloadNow(void)
{
    WIA_PUSHFUNCTION(TEXT("DllCanUnloadNow"));
    if (g_nServerLocks == 0 && g_nComponents == 0)
    {
        WIA_TRACE((TEXT("Can unload")));
        return S_OK;
    }
    else
    {
        WIA_ERROR((TEXT("Can't unload module!")));
        return S_FALSE;
    }
}

extern "C" STDAPI DllGetClassObject( const CLSID &clsid, const IID &iid, void **ppvObject )
{
    WIA_PUSHFUNCTION(TEXT("DllGetClassObject"));

    HRESULT hr = E_FAIL;
    
    //
    // Make sure we've got a valid ppvObject
    //
    if (!ppvObject)
    {
        return(E_INVALIDARG);
    }

    //
    // Make sure this component is supplied by this server
    //
    if (CLSID_WiaDefaultUi == clsid)
    {
        //
        // Create class factory
        //
        CWiaDefaultUiClassFactory *pWiaDefaultUiClassFactory = new CWiaDefaultUiClassFactory;
        if (pWiaDefaultUiClassFactory)
        {
            //
            // Get the requested interface
            //
            hr = pWiaDefaultUiClassFactory->QueryInterface( iid, ppvObject );

            //
            // Release the 'new-ed' instance
            //
            pWiaDefaultUiClassFactory->Release();
        }
        else
        {
            hr = E_OUTOFMEMORY;
        }
    }
    else if (CLSID_WiaAutoPlayDropTarget == clsid)
    {
        //
        // Create class factory
        //
        CWiaAutoPlayDropTargetClassFactory *pWiaAutoPlayDropTargetClassFactory = new CWiaAutoPlayDropTargetClassFactory;
        if (pWiaAutoPlayDropTargetClassFactory)
        {
            //
            // Get the requested interface
            //
            hr = pWiaAutoPlayDropTargetClassFactory->QueryInterface( iid, ppvObject );

            //
            // Release the 'new-ed' instance
            //
            pWiaAutoPlayDropTargetClassFactory->Release();
        }
        else
        {
            hr = E_OUTOFMEMORY;
        }
    }
    else
    {
        hr = CLASS_E_CLASSNOTAVAILABLE;
    }

    return (hr);
}