IPERFILE.CPP

/* 
 * IPERFILE.CPP 
 * Cosmo Chapter 21 
 * 
 * Implementation of the IPersistFile interface for Cosmo 
 * 
 * Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved 
 * 
 * Kraig Brockschmidt, Microsoft 
 * Internet  :  kraigb@microsoft.com 
 * Compuserve:  >INTERNET:kraigb@microsoft.com 
 */ 
 
 
#include "cosmo.h" 
 
 
/* 
 * CImpIPersistFile:CImpIPersistFile 
 * CImpIPersistFile::~CImpIPersistFile 
 * 
 * Constructor Parameters: 
 *  pObj            PCFigure associated with this object. 
 *  pUnkOuter       LPUNKNOWN of the controlling unknown. 
 */ 
 
CImpIPersistFile::CImpIPersistFile(PCFigure pObj 
    , LPUNKNOWN pUnkOuter) 
    { 
    m_cRef=0; 
    m_pObj=pObj; 
    m_pUnkOuter=pUnkOuter; 
    return; 
    } 
 
 
CImpIPersistFile::~CImpIPersistFile(void) 
    { 
    return; 
    } 
 
 
 
 
/* 
 * CImpIPersistFile::QueryInterface 
 * CImpIPersistFile::AddRef 
 * CImpIPersistFile::Release 
 */ 
 
STDMETHODIMP CImpIPersistFile::QueryInterface(REFIID riid 
    , PPVOID ppv) 
    { 
    return m_pUnkOuter->QueryInterface(riid, ppv); 
    } 
 
STDMETHODIMP_(ULONG) CImpIPersistFile::AddRef(void) 
    { 
    ++m_cRef; 
    return m_pUnkOuter->AddRef(); 
    } 
 
STDMETHODIMP_(ULONG) CImpIPersistFile::Release(void) 
    { 
    --m_cRef; 
    return m_pUnkOuter->Release(); 
    } 
 
 
 
 
/* 
 * CImpIPersistFile::GetClassID 
 * 
 * Purpose: 
 *  Returns the CLSID of the file represented by this interface. 
 * 
 * Parameters: 
 *  pClsID          LPCLSID in which to store our CLSID. 
 * 
 * Return Value: 
 *  HRESULT         NOERROR or a general error value. 
 */ 
 
STDMETHODIMP CImpIPersistFile::GetClassID(LPCLSID pClsID) 
    { 
    *pClsID=CLSID_CosmoFigure; 
    return NOERROR; 
    } 
 
 
 
 
 
/* 
 * CImpIPersistFile::IsDirty 
 * 
 * Purpose: 
 *  Tells the caller if we have made changes to this file since 
 *  it was loaded or initialized new. 
 * 
 * Parameters: 
 *  None 
 * 
 * Return Value: 
 *  HRESULT         Contains S_OK if we ARE dirty, S_FALSE if 
 *                  NOT dirty. 
 */ 
 
STDMETHODIMP CImpIPersistFile::IsDirty(void) 
    { 
    return ResultFromScode(m_pObj->FIsDirty() ? S_OK : S_FALSE); 
    } 
 
 
 
 
 
/* 
 * IPersistFile::Load 
 * 
 * Purpose: 
 *  Asks the server to load the document for the given filename. 
 * 
 * Parameters: 
 *  pszFile         LPCOLESTR to the filename to load. 
 *  grfMode         DWORD containing open flags requested from the 
 *                  caller.  Currently these are safely ignored. 
 * 
 * Return Value: 
 *  HRESULT         NOERROR or a general error value. 
 */ 
 
STDMETHODIMP CImpIPersistFile::Load(LPCOLESTR pszFile, DWORD grfMode) 
    { 
    UINT        uRet; 
 
   #ifdef WIN32ANSI 
    TCHAR       szTemp[CCHPATHMAX]; 
    WideCharToMultiByte(CP_ACP, 0, pszFile, -1, szTemp, CCHPATHMAX 
        , NULL, NULL); 
    uRet=m_pObj->m_pDoc->Load(TRUE, (LPTSTR)szTemp); 
   #else 
    uRet=m_pObj->m_pDoc->Load(TRUE, (LPTSTR)pszFile); 
   #endif 
    return (DOCERR_NONE==uRet) ? NOERROR 
        : ResultFromScode(STG_E_READFAULT); 
    } 
 
 
 
 
 
/* 
 * IPersistFile::Save 
 * 
 * Purpose: 
 * Purpose: 
 *  Instructs the server to write the current file into a new 
 *  filename, possibly then using that filename as the current one. 
 * 
 * Parameters: 
 *  pszFile         LPCOLESTR of the file into which we save.  If NULL, 
 *                  this means save the current file. 
 *  fRemember       BOOL indicating if we're to use this filename as 
 *                  the current file now (Save As instead of Save 
 *                  Copy As). 
 * 
 * Return Value: 
 *  HRESULT         NOERROR or a general error value. 
 */ 
 
STDMETHODIMP CImpIPersistFile::Save(LPCOLESTR pszFile, BOOL fRemember) 
    { 
    UINT        uRet; 
    BOOL        fTemp; 
 
    /* 
     * We set CFigure::m_fEmbedding here to TRUE if we don't want to 
     * remember this file, as that cons Save into ignoring this 
     * filename.  This is not something you have to do in your own 
     * code the same way, but be sure to pay attention to fRemember. 
     */ 
    fTemp=m_pObj->m_fEmbedded; 
    m_pObj->m_fEmbedded=!fRemember; 
   #ifdef WIN32ANSI 
    char        szTemp[CCHPATHMAX]; 
 
    WideCharToMultiByte(CP_ACP, 0, pszFile, -1, szTemp, CCHPATHMAX 
       , NULL, NULL); 
    uRet=m_pObj->m_pDoc->Save(0, szTemp); 
   #else 
    uRet=m_pObj->m_pDoc->Save(0, (LPTSTR)pszFile); 
   #endif 
 
    m_pObj->m_fEmbedded=fTemp; 
 
    return (DOCERR_NONE==uRet) ? NOERROR 
        : ResultFromScode(STG_E_WRITEFAULT); 
    } 
 
 
 
 
 
/* 
 * IPersistFile::SaveCompleted 
 * 
 * Purpose: 
 *  Informs us that the operation that called Save is now finished 
 *  and we can access the file again. 
 * 
 * Parameters: 
 *  pszFile         LPCOLESTR of the file in which we can start 
 *                  writing again. 
 * 
 * Return Value: 
 *  HRESULT         NOERROR or a general error value. 
 */ 
 
STDMETHODIMP CImpIPersistFile::SaveCompleted(LPCOLESTR pszFile) 
    { 
    return NOERROR; 
    } 
 
 
 
 
/* 
 * IPersistFile::GetCurFile 
 * 
 * Purpose: 
 *  Retrieves the name of the current file. 
 * 
 * Parameters: 
 *  ppszFile        LPOLESTR * into which we store a pointer to 
 *                  the filename that should be allocated with the 
 *                  shared IMalloc. 
 * 
 * Return Value: 
 *  HRESULT         NOERROR or a general error value. 
 */ 
 
STDMETHODIMP CImpIPersistFile::GetCurFile(LPOLESTR *ppszFile) 
    { 
    LPMALLOC    pIMalloc; 
    LPOLESTR    psz; 
    UINT        uRet; 
 
    *ppszFile=NULL; 
 
    if (FAILED(CoGetMalloc(MEMCTX_TASK, &pIMalloc))) 
        return ResultFromScode(E_FAIL); 
 
    psz=(LPOLESTR)pIMalloc->Alloc(CCHPATHMAX*sizeof(OLECHAR)); 
    pIMalloc->Release(); 
 
   #ifdef WIN32ANSI 
    char    szTemp[CCHPATHMAX]; 
 
    uRet=m_pObj->m_pDoc->FilenameGet(szTemp, CCHPATHMAX); 
    MultiByteToWideChar(CP_ACP, 0, szTemp, -1, psz, CCHPATHMAX); 
   #else 
    uRet=m_pObj->m_pDoc->FilenameGet(psz, CCHPATHMAX); 
   #endif 
 
    //If we have no filename, return the prompt for File Open/Save. 
    if (0==uRet) 
       #ifdef WIN32ANSI 
        MultiByteToWideChar(CP_ACP, 0 
            , (*m_pObj->m_pST)[IDS_EXTENSION], -1, psz, CCHPATHMAX); 
       #else 
        lstrcpy(psz, (*m_pObj->m_pST)[IDS_EXTENSION]); 
       #endif 
 
    *ppszFile=psz; 
    return (0==uRet) ? ResultFromScode(S_FALSE) : NOERROR; 
    }