datacache.c

winNT技术操作系统,国外开放的原代码和LIUX一样

}

/************************************************************************
 * DataCache_IPersistStorage_AddRef (IUnknown)
 *
 * See Windows documentation for more details on IUnknown methods.
 */
static ULONG WINAPI DataCache_IPersistStorage_AddRef(
            IPersistStorage* iface)
{
  DataCache *this = impl_from_IPersistStorage(iface);

  return IUnknown_AddRef(this->outerUnknown);
}

/************************************************************************
 * DataCache_IPersistStorage_Release (IUnknown)
 *
 * See Windows documentation for more details on IUnknown methods.
 */
static ULONG WINAPI DataCache_IPersistStorage_Release(
            IPersistStorage* iface)
{
  DataCache *this = impl_from_IPersistStorage(iface);

  return IUnknown_Release(this->outerUnknown);
}

/************************************************************************
 * DataCache_GetClassID (IPersistStorage)
 *
 * The data cache doesn't implement this method.
 *
 * See Windows documentation for more details on IPersistStorage methods.
 */
static HRESULT WINAPI DataCache_GetClassID(
            IPersistStorage* iface,
	    CLSID*           pClassID)
{
  TRACE("(%p, %p)\n", iface, pClassID);
  return E_NOTIMPL;
}

/************************************************************************
 * DataCache_IsDirty (IPersistStorage)
 *
 * Until we actully connect to a running object and retrieve new
 * information to it, we never get dirty.
 *
 * See Windows documentation for more details on IPersistStorage methods.
 */
static HRESULT WINAPI DataCache_IsDirty(
            IPersistStorage* iface)
{
  TRACE("(%p)\n", iface);

  return S_FALSE;
}

/************************************************************************
 * DataCache_InitNew (IPersistStorage)
 *
 * The data cache implementation of IPersistStorage_InitNew simply stores
 * the storage pointer.
 *
 * See Windows documentation for more details on IPersistStorage methods.
 */
static HRESULT WINAPI DataCache_InitNew(
            IPersistStorage* iface,
	    IStorage*        pStg)
{
  TRACE("(%p, %p)\n", iface, pStg);

  return IPersistStorage_Load(iface, pStg);
}

/************************************************************************
 * DataCache_Load (IPersistStorage)
 *
 * The data cache implementation of IPersistStorage_Load doesn't
 * actually load anything. Instead, it holds on to the storage pointer
 * and it will load the presentation information when the
 * IDataObject_GetData or IViewObject2_Draw methods are called.
 *
 * See Windows documentation for more details on IPersistStorage methods.
 */
static HRESULT WINAPI DataCache_Load(
            IPersistStorage* iface,
	    IStorage*        pStg)
{
  DataCache *this = impl_from_IPersistStorage(iface);

  TRACE("(%p, %p)\n", iface, pStg);

  if (this->presentationStorage != NULL)
  {
    IStorage_Release(this->presentationStorage);
  }

  this->presentationStorage = pStg;

  if (this->presentationStorage != NULL)
  {
    IStorage_AddRef(this->presentationStorage);
  }
  return S_OK;
}

/************************************************************************
 * DataCache_Save (IPersistStorage)
 *
 * Until we actully connect to a running object and retrieve new
 * information to it, we never have to save anything. However, it is
 * our responsability to copy the information when saving to a new
 * storage.
 *
 * See Windows documentation for more details on IPersistStorage methods.
 */
static HRESULT WINAPI DataCache_Save(
            IPersistStorage* iface,
	    IStorage*        pStg,
	    BOOL             fSameAsLoad)
{
  DataCache *this = impl_from_IPersistStorage(iface);

  TRACE("(%p, %p, %d)\n", iface, pStg, fSameAsLoad);

  if ( (!fSameAsLoad) &&
       (this->presentationStorage!=NULL) )
  {
    return IStorage_CopyTo(this->presentationStorage,
			   0,
			   NULL,
			   NULL,
			   pStg);
  }

  return S_OK;
}

/************************************************************************
 * DataCache_SaveCompleted (IPersistStorage)
 *
 * This method is called to tell the cache to release the storage
 * pointer it's currentlu holding.
 *
 * See Windows documentation for more details on IPersistStorage methods.
 */
static HRESULT WINAPI DataCache_SaveCompleted(
            IPersistStorage* iface,
	    IStorage*        pStgNew)
{
  TRACE("(%p, %p)\n", iface, pStgNew);

  if (pStgNew)
  {
  /*
   * First, make sure we get our hands off any storage we have.
   */

  IPersistStorage_HandsOffStorage(iface);

  /*
   * Then, attach to the new storage.
   */

  DataCache_Load(iface, pStgNew);
  }

  return S_OK;
}

/************************************************************************
 * DataCache_HandsOffStorage (IPersistStorage)
 *
 * This method is called to tell the cache to release the storage
 * pointer it's currentlu holding.
 *
 * See Windows documentation for more details on IPersistStorage methods.
 */
static HRESULT WINAPI DataCache_HandsOffStorage(
            IPersistStorage* iface)
{
  DataCache *this = impl_from_IPersistStorage(iface);

  TRACE("(%p)\n", iface);

  if (this->presentationStorage != NULL)
  {
    IStorage_Release(this->presentationStorage);
    this->presentationStorage = NULL;
  }

  return S_OK;
}

/*********************************************************
 * Method implementation for the IViewObject2
 * part of the DataCache class.
 */

/************************************************************************
 * DataCache_IViewObject2_QueryInterface (IUnknown)
 *
 * See Windows documentation for more details on IUnknown methods.
 */
static HRESULT WINAPI DataCache_IViewObject2_QueryInterface(
            IViewObject2* iface,
            REFIID           riid,
            void**           ppvObject)
{
  DataCache *this = impl_from_IViewObject2(iface);

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

/************************************************************************
 * DataCache_IViewObject2_AddRef (IUnknown)
 *
 * See Windows documentation for more details on IUnknown methods.
 */
static ULONG WINAPI DataCache_IViewObject2_AddRef(
            IViewObject2* iface)
{
  DataCache *this = impl_from_IViewObject2(iface);

  return IUnknown_AddRef(this->outerUnknown);
}

/************************************************************************
 * DataCache_IViewObject2_Release (IUnknown)
 *
 * See Windows documentation for more details on IUnknown methods.
 */
static ULONG WINAPI DataCache_IViewObject2_Release(
            IViewObject2* iface)
{
  DataCache *this = impl_from_IViewObject2(iface);

  return IUnknown_Release(this->outerUnknown);
}

/************************************************************************
 * DataCache_Draw (IViewObject2)
 *
 * This method will draw the cached representation of the object
 * to the given device context.
 *
 * See Windows documentation for more details on IViewObject2 methods.
 */
static HRESULT WINAPI DataCache_Draw(
            IViewObject2*    iface,
	    DWORD            dwDrawAspect,
	    LONG             lindex,
	    void*            pvAspect,
	    DVTARGETDEVICE*  ptd,
	    HDC              hdcTargetDev,
	    HDC              hdcDraw,
	    LPCRECTL         lprcBounds,
	    LPCRECTL         lprcWBounds,
	    BOOL  (CALLBACK *pfnContinue)(ULONG_PTR dwContinue),
	    ULONG_PTR        dwContinue)
{
  PresentationDataHeader presData;
  HMETAFILE              presMetafile = 0;
  HRESULT                hres;

  DataCache *this = impl_from_IViewObject2(iface);

  TRACE("(%p, %lx, %ld, %p, %p, %p, %p, %p, %p, %lx)\n",
	iface,
	dwDrawAspect,
	lindex,
	pvAspect,
	hdcTargetDev,
	hdcDraw,
	lprcBounds,
	lprcWBounds,
	pfnContinue,
	dwContinue);

  /*
   * Sanity check
   */
  if (lprcBounds==NULL)
    return E_INVALIDARG;

  /*
   * First, we need to retrieve the dimensions of the
   * image in the metafile.
   */
  hres = DataCache_ReadPresentationData(this,
					dwDrawAspect,
					&presData);

  if (FAILED(hres))
    return hres;

  /*
   * Then, we can extract the metafile itself from the cached
   * data.
   *
   * FIXME Unless it isn't a metafile. I think it could be any CF_XXX type,
   * particularly CF_DIB.
   */
  presMetafile = DataCache_ReadPresMetafile(this,
					    dwDrawAspect);

  /*
   * If we have a metafile, just draw baby...
   * We have to be careful not to modify the state of the
   * DC.
   */
  if (presMetafile!=0)
  {
    INT   prevMapMode = SetMapMode(hdcDraw, MM_ANISOTROPIC);
    SIZE  oldWindowExt;
    SIZE  oldViewportExt;
    POINT oldViewportOrg;

    SetWindowExtEx(hdcDraw,
		   presData.dwObjectExtentX,
		   presData.dwObjectExtentY,
		   &oldWindowExt);

    SetViewportExtEx(hdcDraw,
		     lprcBounds->right - lprcBounds->left,
		     lprcBounds->bottom - lprcBounds->top,
		     &oldViewportExt);

    SetViewportOrgEx(hdcDraw,
		     lprcBounds->left,
		     lprcBounds->top,
		     &oldViewportOrg);

    PlayMetaFile(hdcDraw, presMetafile);

    SetWindowExtEx(hdcDraw,
		   oldWindowExt.cx,
		   oldWindowExt.cy,
		   NULL);

    SetViewportExtEx(hdcDraw,
		     oldViewportExt.cx,
		     oldViewportExt.cy,
		     NULL);

    SetViewportOrgEx(hdcDraw,
		     oldViewportOrg.x,
		     oldViewportOrg.y,
		     NULL);

    SetMapMode(hdcDraw, prevMapMode);

    DeleteMetaFile(presMetafile);
  }

  return S_OK;
}

static HRESULT WINAPI DataCache_GetColorSet(
            IViewObject2*   iface,
	    DWORD           dwDrawAspect,
	    LONG            lindex,
	    void*           pvAspect,
	    DVTARGETDEVICE* ptd,
	    HDC             hicTargetDevice,
	    LOGPALETTE**    ppColorSet)
{
  FIXME("stub\n");
  return E_NOTIMPL;
}

static HRESULT WINAPI DataCache_Freeze(
            IViewObject2*   iface,
	    DWORD           dwDrawAspect,
	    LONG            lindex,
	    void*           pvAspect,
	    DWORD*          pdwFreeze)
{
  FIXME("stub\n");
  return E_NOTIMPL;
}

static HRESULT WINAPI DataCache_Unfreeze(
            IViewObject2*   iface,
	    DWORD           dwFreeze)
{
  FIXME("stub\n");
  return E_NOTIMPL;
}

/************************************************************************
 * DataCache_SetAdvise (IViewObject2)
 *
 * This sets-up an advisory sink with the data cache. When the object's
 * view changes, this sink is called.
 *
 * See Windows documentation for more details on IViewObject2 methods.
 */
static HRESULT WINAPI DataCache_SetAdvise(
            IViewObject2*   iface,
	    DWORD           aspects,
	    DWORD           advf,
	    IAdviseSink*    pAdvSink)
{
  DataCache *this = impl_from_IViewObject2(iface);

  TRACE("(%p, %lx, %lx, %p)\n", iface, aspects, advf, pAdvSink);

  /*
   * A call to this function removes the previous sink
   */
  if (this->sinkInterface != NULL)
  {
    IAdviseSink_Release(this->sinkInterface);
    this->sinkInterface  = NULL;
    this->sinkAspects    = 0;
    this->sinkAdviseFlag = 0;
  }

  /*
   * Now, setup the new one.
   */
  if (pAdvSink!=NULL)
  {
    this->sinkInterface  = pAdvSink;
    this->sinkAspects    = aspects;
    this->sinkAdviseFlag = advf;

    IAdviseSink_AddRef(this->sinkInterface);
  }

  /*
   * When the ADVF_PRIMEFIRST flag is set, we have to advise the
   * sink immediately.
   */
  if (advf & ADVF_PRIMEFIRST)
  {
    DataCache_FireOnViewChange(this,
			       DVASPECT_CONTENT,
			       -1);
  }

  return S_OK;
}

/************************************************************************
 * DataCache_GetAdvise (IViewObject2)
 *
 * This method queries the current state of the advise sink
 * installed on the data cache.
 *
 * See Windows documentation for more details on IViewObject2 methods.
 */
static HRESULT WINAPI DataCache_GetAdvise(
            IViewObject2*   iface,
	    DWORD*          pAspects,