datacache.c

winNT技术操作系统,国外开放的原代码和LIUX一样

	    DWORD*          pAdvf,
	    IAdviseSink**   ppAdvSink)
{
  DataCache *this = impl_from_IViewObject2(iface);

  TRACE("(%p, %p, %p, %p)\n", iface, pAspects, pAdvf, ppAdvSink);

  /*
   * Just copy all the requested values.
   */
  if (pAspects!=NULL)
    *pAspects = this->sinkAspects;

  if (pAdvf!=NULL)
    *pAdvf = this->sinkAdviseFlag;

  if (ppAdvSink!=NULL)
  {
    if (this->sinkInterface != NULL)
        IAdviseSink_QueryInterface(this->sinkInterface,
			       &IID_IAdviseSink,
			       (void**)ppAdvSink);
    else *ppAdvSink = NULL;
  }

  return S_OK;
}

/************************************************************************
 * DataCache_GetExtent (IViewObject2)
 *
 * This method retrieves the "natural" size of this cached object.
 *
 * See Windows documentation for more details on IViewObject2 methods.
 */
static HRESULT WINAPI DataCache_GetExtent(
            IViewObject2*   iface,
	    DWORD           dwDrawAspect,
	    LONG            lindex,
	    DVTARGETDEVICE* ptd,
	    LPSIZEL         lpsizel)
{
  PresentationDataHeader presData;
  HRESULT                hres = E_FAIL;

  DataCache *this = impl_from_IViewObject2(iface);

  TRACE("(%p, %lx, %ld, %p, %p)\n",
	iface, dwDrawAspect, lindex, ptd, lpsizel);

  /*
   * Sanity check
   */
  if (lpsizel==NULL)
    return E_POINTER;

  /*
   * Initialize the out parameter.
   */
  lpsizel->cx = 0;
  lpsizel->cy = 0;

  /*
   * This flag should be set to -1.
   */
  if (lindex!=-1)
    FIXME("Unimplemented flag lindex = %ld\n", lindex);

  /*
   * Right now, we support only the callback from
   * the default handler.
   */
  if (ptd!=NULL)
    FIXME("Unimplemented ptd = %p\n", ptd);

  /*
   * Get the presentation information from the
   * cache.
   */
  hres = DataCache_ReadPresentationData(this,
					dwDrawAspect,
					&presData);

  if (SUCCEEDED(hres))
  {
    lpsizel->cx = presData.dwObjectExtentX;
    lpsizel->cy = presData.dwObjectExtentY;
  }

  /*
   * This method returns OLE_E_BLANK when it fails.
   */
  if (FAILED(hres))
    hres = OLE_E_BLANK;

  return hres;
}


/*********************************************************
 * Method implementation for the IOleCache2
 * part of the DataCache class.
 */

/************************************************************************
 * DataCache_IOleCache2_QueryInterface (IUnknown)
 *
 * See Windows documentation for more details on IUnknown methods.
 */
static HRESULT WINAPI DataCache_IOleCache2_QueryInterface(
            IOleCache2*     iface,
            REFIID          riid,
            void**          ppvObject)
{
  DataCache *this = impl_from_IOleCache2(iface);

  return IUnknown_QueryInterface(this->outerUnknown, riid, ppvObject);
}

/************************************************************************
 * DataCache_IOleCache2_AddRef (IUnknown)
 *
 * See Windows documentation for more details on IUnknown methods.
 */
static ULONG WINAPI DataCache_IOleCache2_AddRef(
            IOleCache2*     iface)
{
  DataCache *this = impl_from_IOleCache2(iface);

  return IUnknown_AddRef(this->outerUnknown);
}

/************************************************************************
 * DataCache_IOleCache2_Release (IUnknown)
 *
 * See Windows documentation for more details on IUnknown methods.
 */
static ULONG WINAPI DataCache_IOleCache2_Release(
            IOleCache2*     iface)
{
  DataCache *this = impl_from_IOleCache2(iface);

  return IUnknown_Release(this->outerUnknown);
}

static HRESULT WINAPI DataCache_Cache(
            IOleCache2*     iface,
	    FORMATETC*      pformatetc,
	    DWORD           advf,
	    DWORD*          pdwConnection)
{
  FIXME("stub\n");
  return E_NOTIMPL;
}

static HRESULT WINAPI DataCache_Uncache(
	    IOleCache2*     iface,
	    DWORD           dwConnection)
{
  FIXME("stub\n");
  return E_NOTIMPL;
}

static HRESULT WINAPI DataCache_EnumCache(
            IOleCache2*     iface,
	    IEnumSTATDATA** ppenumSTATDATA)
{
  FIXME("stub\n");
  return E_NOTIMPL;
}

static HRESULT WINAPI DataCache_InitCache(
	    IOleCache2*     iface,
	    IDataObject*    pDataObject)
{
  FIXME("stub\n");
  return E_NOTIMPL;
}

static HRESULT WINAPI DataCache_IOleCache2_SetData(
            IOleCache2*     iface,
	    FORMATETC*      pformatetc,
	    STGMEDIUM*      pmedium,
	    BOOL            fRelease)
{
  FIXME("stub\n");
  return E_NOTIMPL;
}

static HRESULT WINAPI DataCache_UpdateCache(
            IOleCache2*     iface,
	    LPDATAOBJECT    pDataObject,
	    DWORD           grfUpdf,
	    LPVOID          pReserved)
{
  FIXME("stub\n");
  return E_NOTIMPL;
}

static HRESULT WINAPI DataCache_DiscardCache(
            IOleCache2*     iface,
	    DWORD           dwDiscardOptions)
{
  FIXME("stub\n");
  return E_NOTIMPL;
}


/*********************************************************
 * Method implementation for the IOleCacheControl
 * part of the DataCache class.
 */

/************************************************************************
 * DataCache_IOleCacheControl_QueryInterface (IUnknown)
 *
 * See Windows documentation for more details on IUnknown methods.
 */
static HRESULT WINAPI DataCache_IOleCacheControl_QueryInterface(
            IOleCacheControl* iface,
            REFIID            riid,
            void**            ppvObject)
{
  DataCache *this = impl_from_IOleCacheControl(iface);

  return IUnknown_QueryInterface(this->outerUnknown, riid, ppvObject);
}

/************************************************************************
 * DataCache_IOleCacheControl_AddRef (IUnknown)
 *
 * See Windows documentation for more details on IUnknown methods.
 */
static ULONG WINAPI DataCache_IOleCacheControl_AddRef(
            IOleCacheControl* iface)
{
  DataCache *this = impl_from_IOleCacheControl(iface);

  return IUnknown_AddRef(this->outerUnknown);
}

/************************************************************************
 * DataCache_IOleCacheControl_Release (IUnknown)
 *
 * See Windows documentation for more details on IUnknown methods.
 */
static ULONG WINAPI DataCache_IOleCacheControl_Release(
            IOleCacheControl* iface)
{
  DataCache *this = impl_from_IOleCacheControl(iface);

  return IUnknown_Release(this->outerUnknown);
}

static HRESULT WINAPI DataCache_OnRun(
	    IOleCacheControl* iface,
	    LPDATAOBJECT      pDataObject)
{
  FIXME("stub\n");
  return E_NOTIMPL;
}

static HRESULT WINAPI DataCache_OnStop(
	    IOleCacheControl* iface)
{
  FIXME("stub\n");
  return E_NOTIMPL;
}

/*
 * Virtual function tables for the DataCache class.
 */
static const IUnknownVtbl DataCache_NDIUnknown_VTable =
{
  DataCache_NDIUnknown_QueryInterface,
  DataCache_NDIUnknown_AddRef,
  DataCache_NDIUnknown_Release
};

static const IDataObjectVtbl DataCache_IDataObject_VTable =
{
  DataCache_IDataObject_QueryInterface,
  DataCache_IDataObject_AddRef,
  DataCache_IDataObject_Release,
  DataCache_GetData,
  DataCache_GetDataHere,
  DataCache_QueryGetData,
  DataCache_GetCanonicalFormatEtc,
  DataCache_IDataObject_SetData,
  DataCache_EnumFormatEtc,
  DataCache_DAdvise,
  DataCache_DUnadvise,
  DataCache_EnumDAdvise
};

static const IPersistStorageVtbl DataCache_IPersistStorage_VTable =
{
  DataCache_IPersistStorage_QueryInterface,
  DataCache_IPersistStorage_AddRef,
  DataCache_IPersistStorage_Release,
  DataCache_GetClassID,
  DataCache_IsDirty,
  DataCache_InitNew,
  DataCache_Load,
  DataCache_Save,
  DataCache_SaveCompleted,
  DataCache_HandsOffStorage
};

static const IViewObject2Vtbl DataCache_IViewObject2_VTable =
{
  DataCache_IViewObject2_QueryInterface,
  DataCache_IViewObject2_AddRef,
  DataCache_IViewObject2_Release,
  DataCache_Draw,
  DataCache_GetColorSet,
  DataCache_Freeze,
  DataCache_Unfreeze,
  DataCache_SetAdvise,
  DataCache_GetAdvise,
  DataCache_GetExtent
};

static const IOleCache2Vtbl DataCache_IOleCache2_VTable =
{
  DataCache_IOleCache2_QueryInterface,
  DataCache_IOleCache2_AddRef,
  DataCache_IOleCache2_Release,
  DataCache_Cache,
  DataCache_Uncache,
  DataCache_EnumCache,
  DataCache_InitCache,
  DataCache_IOleCache2_SetData,
  DataCache_UpdateCache,
  DataCache_DiscardCache
};

static const IOleCacheControlVtbl DataCache_IOleCacheControl_VTable =
{
  DataCache_IOleCacheControl_QueryInterface,
  DataCache_IOleCacheControl_AddRef,
  DataCache_IOleCacheControl_Release,
  DataCache_OnRun,
  DataCache_OnStop
};

/******************************************************************************
 *              CreateDataCache        [OLE32.@]
 */
HRESULT WINAPI CreateDataCache(
  LPUNKNOWN pUnkOuter,
  REFCLSID  rclsid,
  REFIID    riid,
  LPVOID*   ppvObj)
{
  DataCache* newCache = NULL;
  HRESULT    hr       = S_OK;

  TRACE("(%s, %p, %s, %p)\n", debugstr_guid(rclsid), pUnkOuter, debugstr_guid(riid), ppvObj);

  /*
   * Sanity check
   */
  if (ppvObj==0)
    return E_POINTER;

  *ppvObj = 0;

  /*
   * If this cache is constructed for aggregation, make sure
   * the caller is requesting the IUnknown interface.
   * This is necessary because it's the only time the non-delegating
   * IUnknown pointer can be returned to the outside.
   */
  if ( (pUnkOuter!=NULL) &&
       (memcmp(&IID_IUnknown, riid, sizeof(IID_IUnknown)) != 0) )
    return CLASS_E_NOAGGREGATION;

  /*
   * Try to construct a new instance of the class.
   */
  newCache = DataCache_Construct(rclsid,
				 pUnkOuter);

  if (newCache == 0)
    return E_OUTOFMEMORY;

  /*
   * Make sure it supports the interface required by the caller.
   */
  hr = IUnknown_QueryInterface((IUnknown*)&(newCache->lpvtblNDIUnknown), riid, ppvObj);

  /*
   * Release the reference obtained in the constructor. If
   * the QueryInterface was unsuccessful, it will free the class.
   */
  IUnknown_Release((IUnknown*)&(newCache->lpvtblNDIUnknown));

  return hr;
}

/*********************************************************
 * Method implementation for DataCache class.
 */
static DataCache* DataCache_Construct(
  REFCLSID  clsid,
  LPUNKNOWN pUnkOuter)
{
  DataCache* newObject = 0;

  /*
   * Allocate space for the object.
   */
  newObject = HeapAlloc(GetProcessHeap(), 0, sizeof(DataCache));

  if (newObject==0)
    return newObject;

  /*
   * Initialize the virtual function table.
   */
  newObject->lpVtbl = &DataCache_IDataObject_VTable;
  newObject->lpvtblNDIUnknown = &DataCache_NDIUnknown_VTable;
  newObject->lpvtblIPersistStorage = &DataCache_IPersistStorage_VTable;
  newObject->lpvtblIViewObject = &DataCache_IViewObject2_VTable;
  newObject->lpvtblIOleCache2 = &DataCache_IOleCache2_VTable;
  newObject->lpvtblIOleCacheControl = &DataCache_IOleCacheControl_VTable;

  /*
   * Start with one reference count. The caller of this function
   * must release the interface pointer when it is done.
   */
  newObject->ref = 1;

  /*
   * Initialize the outer unknown
   * We don't keep a reference on the outer unknown since, the way
   * aggregation works, our lifetime is at least as large as it's
   * lifetime.
   */
  if (pUnkOuter==NULL)
    pUnkOuter = (IUnknown*)&(newObject->lpvtblNDIUnknown);

  newObject->outerUnknown = pUnkOuter;

  /*
   * Initialize the other members of the structure.
   */
  newObject->presentationStorage = NULL;
  newObject->sinkAspects = 0;
  newObject->sinkAdviseFlag = 0;
  newObject->sinkInterface = 0;

  return newObject;
}