document.cpp

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     * Revert changes on the original storage.  If this was a temp
     * file, it's deleted since we used STGM_DELETEONRELEASE.
     */
    m_pIStorage->Release();

    //Make this new storage current
    m_pIStorage=pIStorage;
    pIPersistStorage->SaveCompleted(m_pIStorage);
    pIPersistStorage->Release();

    Rename(pszFile);
    FDirtySet(FALSE);
    return DOCERR_NONE;
    }






/*
 * CFreeloaderDoc::Clip
 *
 * Purpose:
 *  Places a private format, a metafile, and a bitmap of the display
 *  on the clipboard, optionally implementing Cut by deleting the
 *  data in the current window after rendering.
 *
 * Parameters:
 *  hWndFrame       HWND of the main window.
 *  fCut            BOOL indicating cut (TRUE) or copy (FALSE).
 *
 * Return Value:
 *  BOOL            TRUE if successful, FALSE otherwise.
 */

BOOL CFreeloaderDoc::Clip(HWND hWndFrame, BOOL fCut)
    {
    BOOL            fRet=TRUE;
    static UINT     rgcf[3]={CF_METAFILEPICT, CF_DIB, CF_BITMAP};
    const UINT      cFormats=3;
    UINT            i;
    HGLOBAL         hMem;

    if (NULL==m_pIUnknown)
        return FALSE;

    if (!OpenClipboard(hWndFrame))
        return FALSE;

    //Clean out whatever junk is in the clipboard.
    EmptyClipboard();

    for (i=0; i < cFormats; i++)
        {
        hMem=RenderFormat(rgcf[i]);

        if (NULL!=hMem)
            {
            SetClipboardData(rgcf[i], hMem);
            fRet=TRUE;
            break;
            }
        }

    //Free clipboard ownership.
    CloseClipboard();

    //If we're cutting, clean out the cache and the object we hold.
    if (fRet && fCut)
        {
        ReleaseObject();
        InvalidateRect(m_hWnd, NULL, TRUE);
        UpdateWindow(m_hWnd);
        FDirtySet(TRUE);
        }

    return fRet;
    }





/*
 * CFreeloaderDoc::RenderFormat
 *
 * Purpose:
 *  Renders a specific clipboard format into global memory.
 *
 * Parameters:
 *  cf              UINT format to render.
 *
 * Return Value:
 *  HGLOBAL         Global memory handle containing the data.
 */

HGLOBAL CFreeloaderDoc::RenderFormat(UINT cf)
    {
    LPDATAOBJECT        pIDataObject;
    FORMATETC           fe;
    STGMEDIUM           stm;

    if (NULL==m_pIUnknown)
        return NULL;

    //We only have to ask the data object (cache) for the data.
    switch (cf)
        {
        case CF_METAFILEPICT:
            stm.tymed=TYMED_MFPICT;
            break;

       case CF_DIB:
            stm.tymed=TYMED_HGLOBAL;
            break;

       case CF_BITMAP:
            stm.tymed=TYMED_GDI;
            break;

        default:
            return NULL;
        }

    stm.hGlobal=NULL;
    SETDefFormatEtc(fe, cf, stm.tymed);

    m_pIUnknown->QueryInterface(IID_IDataObject
        , (PPVOID)&pIDataObject);
    pIDataObject->GetData(&fe, &stm);
    pIDataObject->Release();

    return stm.hGlobal;
    }






/*
 * CFreeloaderDoc::FQueryPaste
 *
 * Purpose:
 *  Determines if we can paste data from the clipboard.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  BOOL            TRUE if data is available, FALSE otherwise.
 */

BOOL CFreeloaderDoc::FQueryPaste(void)
    {
    return IsClipboardFormatAvailable(CF_BITMAP)
        || IsClipboardFormatAvailable(CF_DIB)
        || IsClipboardFormatAvailable(CF_METAFILEPICT);
    }





/*
 * CFreeloaderDoc::Paste
 *
 * Purpose:
 *  Retrieves the private data format from the clipboard and sets it
 *  to the current figure in the editor window.
 *
 *  Note that if this function is called, then the clipboard format
 *  is available because the Paste menu item is only enabled if the
 *  format is present.
 *
 * Parameters:
 *  hWndFrame       HWND of the main window.
 *
 * Return Value:
 *  BOOL            TRUE if successful, FALSE otherwise.
 */

BOOL CFreeloaderDoc::Paste(HWND hWndFrame)
    {
    UINT                cf=0;
    HGLOBAL             hMem;
    HRESULT             hr;
    DWORD               dwConn;
    LPUNKNOWN           pIUnknown;
    LPOLECACHE          pIOleCache;
    LPPERSISTSTORAGE    pIPersistStorage;
    FORMATETC           fe;
    STGMEDIUM           stm;
    CLSID               clsID;

    if (!OpenClipboard(hWndFrame))
        return FALSE;

    /*
     * Try to get data in order of metafile, dib, bitmap.  We set
     * stm.tymed up front so if we actually get something a call
     * to ReleaseStgMedium will clean it up for us.
     */

    stm.pUnkForRelease=NULL;
    stm.tymed=TYMED_MFPICT;
    hMem=GetClipboardData(CF_METAFILEPICT);

    if (NULL!=hMem)
        cf=CF_METAFILEPICT;

    if (0==cf)
        {
        stm.tymed=TYMED_HGLOBAL;
        hMem=GetClipboardData(CF_DIB);

        if (NULL!=hMem)
            cf=CF_DIB;
        }

    if (0==cf)
        {
        stm.tymed=TYMED_GDI;
        hMem=GetClipboardData(CF_BITMAP);

        if (NULL!=hMem)
            cf=CF_BITMAP;
        }

    stm.hGlobal=OleDuplicateData(hMem, cf, NULL);
    CloseClipboard();

    //Didn't get anything?  Then we're finished.
    if (0==cf)
        return FALSE;

    //This now describes the data we have.
    SETDefFormatEtc(fe, cf, stm.tymed);


    /*
     * Create a data cache to deal with this data using
     * either CoCreateInstance for an OLE-supported CLSID or
     * CreateDataCache.  The first will go through all the
     * exercises of looking up the CLSID in the regDB, finding
     * the OLE DLL (registered for these classes), getting a class
     * factory, and using IClassFactory::CreateInstance.  The
     * second goes into OLE directly, creating the same object
     * with less overhead.  Thus we use CreateDataCache.
     */

    if (CF_METAFILEPICT==cf)
        clsID=CLSID_Picture_Metafile;
    else
        clsID=CLSID_Picture_Dib;

    hr=CreateDataCache(NULL, clsID, IID_IUnknown
        , (PPVOID)&pIUnknown);

    if (FAILED(hr))
        {
        ReleaseStgMedium(&stm);
        return FALSE;
        }

    /*
     * Our contract says we provide storage through
     * IPersistStorage::InitNew.  We know that the object we're
     * dealing with supports IPersistStorage and IOleCache, so
     * we don't bother to check return values.  I guess we're
     * living dangerously...
     */
    pIUnknown->QueryInterface(IID_IPersistStorage
        , (PPVOID)&pIPersistStorage);
    pIPersistStorage->InitNew(m_pIStorage);
    pIPersistStorage->Release();

    /*
     * Now that we have the cache object, shove the data into it.
     * No advise flags are necessary for static data.
     */
    pIUnknown->QueryInterface(IID_IOleCache, (PPVOID)&pIOleCache);
    pIOleCache->Cache(&fe, ADVF_PRIMEFIRST, &dwConn);

    hr=pIOleCache->SetData(&fe, &stm, TRUE);
    pIOleCache->Release();

    if (FAILED(hr))
        {
        ReleaseStgMedium(&stm);
        pIUnknown->Release();
        return FALSE;
        }

    //Now that that's all done, replace our current with the new.
    ReleaseObject();
    m_pIUnknown=pIUnknown;
    m_dwConn=dwConn;
    m_clsID=clsID;

    FDirtySet(TRUE);

    InvalidateRect(m_hWnd, NULL, TRUE);
    UpdateWindow(m_hWnd);
    return TRUE;
    }



/*
 * CFreeloaderDoc::SizeToGraphic
 *
 * Purpose:
 *  Determines if we can size the window to the contained
 *  graphic and alternately performs the operation.
 *
 * Parameters:
 *  fQueryOnly      BOOL indicating if we just want to know
 *                  if sizing is possible (TRUE) or that we
 *                  want to perform the sizing (FALSE).
 *
 * Return Value:
 *  BOOL            TRUE if data is available, FALSE otherwise.
 */

BOOL CFreeloaderDoc::SizeToGraphic(BOOL fQueryOnly)
    {
    HRESULT             hr;
    LPVIEWOBJECT2       pIViewObject2;
    SIZEL               szl;
    RECT                rc;
    UINT                cx, cy;
    HDC                 hDC;
    DWORD               dwStyle;

    if (NULL==m_pIUnknown)
        return FALSE;

    m_pIUnknown->QueryInterface(IID_IViewObject2
        , (PPVOID)&pIViewObject2);

    if (FAILED(hr))
        return FALSE;

    if (fQueryOnly)
        {
        pIViewObject2->Release();
        return TRUE;
        }

    hr=pIViewObject2->GetExtent(DVASPECT_CONTENT, -1, NULL, &szl);
    pIViewObject2->Release();

    if (FAILED(hr))
        return FALSE;

    //Calculate new doc rectangle based on these extents.

    hDC=GetDC(NULL);
    cx=MulDiv((int)szl.cx, GetDeviceCaps(hDC, LOGPIXELSX)
        , HIMETRIC_PER_INCH);
    cy=MulDiv((int)szl.cy, GetDeviceCaps(hDC, LOGPIXELSY)
        , HIMETRIC_PER_INCH);
    ReleaseDC(NULL, hDC);

    SetRect(&rc, 0, 0, cx, cy);
    dwStyle=GetWindowLong(m_hWnd, GWL_STYLE);
    AdjustWindowRect(&rc, dwStyle, FALSE);

    /*
     * If the window is currently maximized, then we have to
     * restore it first before sizing.
     */
    if (IsZoomed(m_hWnd))
        ShowWindow(m_hWnd, SW_RESTORE);

    SetWindowPos(m_hWnd, NULL, 0, 0
        , rc.right-rc.left , rc.bottom-rc.top
        , SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE);

    return TRUE;
    }