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file.c
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C/C++ Source or Header
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1995-05-03
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11KB
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460 lines
/*
* FILE.C
*
* Functions for handling dirty files and processing File menu commands.
*
* Functions:
* FDirtySet, FCleanVerify
* FFileNew, FFileOpen, FFileSave, FFileSaveAs, FFileExit
*
* This file contains the only functions that manipulate the fDirty flag.
*
* Copyright(c) Microsoft Corp. 1992-1994 All Rights Reserved
* Win32 version, January 1994
*/
#include <windows.h>
#include <ole.h>
#include "cosmo.h"
#include "oleglobl.h"
/*
* FDirtySet
*
* Purpose:
* Sets or clears the global 'dirty' flag returning the previous state
* of that same flag. Even though the non-OLE part of this function
* is trivial, it isolates handling changes, providing a single point
* to notify a client app with OLE_CHANGED.
*
* This function does exits if pGlob->fNoDirty is set.
*
* Parameters:
* fDirty BOOL used to set the value of the pGLob->fDirty flag.
* This allows us to use this function to both set and
* clear the flag. OLE_CHANGED is only sent if the
* flag is set to TRUE.
*
* Return Value:
* BOOL Previous value of the dirty flag.
*/
BOOL WINAPI FDirtySet(BOOL fDirty)
{
BOOL fPrevious;
#ifdef MAKEOLESERVER
/*
* If we are a hidden window, then there's nothing that could make
* us dirty since there cannot be any user interaction here. Therefore
* ignore any changes to the dirty flag, leaving it FALSE.
*/
if (!IsWindowVisible(pGlob->hWnd))
return pGlob->fDirty;
#endif //MAKEOLESERVER
if (pGlob->fNoDirty)
return pGlob->fDirty;
fPrevious=pGlob->fDirty;
pGlob->fDirty=fDirty;
#ifdef MAKEOLESERVER
if (fDirty)
//Fun indirection, huh? That what you get with an OOP.
OLEClientNotify(pOLE->pSvr->pDoc->pObj, OLE_CHANGED);
#endif //MAKEOLESERVER
return fPrevious;
}
/*
* FCleanVerify
*
* Purpose:
* Checks the pGLob->fDirty flag, and if set, displays a message
* box informing the user that the file is dirty and asking if
* the file should be saved or updated. If YES is chosen, the file
* is saved or updated.
*
* Parameters:
* pGlob LPGLOBALS to global variable block.
*
* Return Value:
* BOOL TRUE if it's safe to proceed with the operation (file
* is clean, user answered NO, or file was saved).
* FALSE if the user wants to cancel the operation or there
* was an error.
*/
BOOL WINAPI FCleanVerify(LPGLOBALS pGlob)
{
BOOL fRet=TRUE;
UINT uRet;
char *psz;
#ifdef MAKEOLESERVER
char szClient[40];
#endif //MAKEOLESERVER
//Nothing to do if we're clean.
if (!pGlob->fDirty)
return TRUE;
if (!pGlob->fOLE)
{
uRet=MessageBox(pGlob->hWnd, rgpsz[IDS_FILEDIRTY]
, rgpsz[IDS_CAPTION], MB_YESNOCANCEL | MB_ICONEXCLAMATION);
}
#ifdef MAKEOLESERVER
if (pGlob->fOLE)
{
//Linking case, use the same message as before.
if (pOLE->pSvr->fLink)
{
uRet=MessageBox(pGlob->hWnd, rgpsz[IDS_FILEDIRTY],
rgpsz[IDS_CAPTION], MB_YESNOCANCEL);
}
//Embedding: Ask the user about updating instead of saving.
if (pOLE->pSvr->fEmbed)
{
//Build the standard string for Updating.
psz=(PSTR)LocalAlloc(LPTR, 1024);
if (NULL==psz)
return FALSE;
GetAtomName(pOLE->pSvr->pDoc->aClient, szClient, sizeof(szClient));
lstrcpy(psz, rgpsz[IDS_CLOSEALERT1]);
lstrcat(psz, szClient);
lstrcat(psz, rgpsz[IDS_CLOSEALERT2]);
uRet=MessageBox(pGlob->hWnd, psz, rgpsz[IDS_CAPTION],
MB_YESNOCANCEL | MB_ICONEXCLAMATION);
LocalFree((HLOCAL)psz);
}
}
#endif //MAKEOLESERVER
switch (uRet)
{
case IDCANCEL:
fRet=FALSE;
break;
case IDNO:
fRet=TRUE;
break;
case IDYES:
if (!pGlob->fOLE)
fRet=FFileSave(pGlob);
#ifdef MAKEOLESERVER
//Linking same as stand-alone.
if (pOLE->pSvr->fLink)
fRet=FFileSave(pGlob);
if (pOLE->pSvr->fEmbed)
OLEClientNotify(pOLE->pSvr->pDoc->pObj, OLE_CLOSED);
#endif //MAKEOLESERVER
break;
}
return fRet;
}
/*
* FFileNew
*
* Purpose:
* Confirms the new file with the user and cleans out the Polyline
* image.
*
* Parameters:
* pGlob LPGLOBALS to the global variable block.
*
* Return Value:
* BOOL TRUE if the function succeeded, FALSE otherwise.
*
*/
BOOL WINAPI FFileNew(LPGLOBALS pGlob)
{
if (!FCleanVerify(pGlob))
return FALSE;
#ifdef MAKEOLESERVER
PDocRevokeAndCreate(pOLE);
#endif //MAKEOLESERVER
pGlob->fOLE=FALSE;
SendMessage(pGlob->hWndPolyline, PLM_POLYLINENEW, 0, 0L);
pGlob->fDirty=FALSE;
pGlob->fOpenFile=FALSE;
WindowTitleSet(pGlob->hWnd, rgpsz[IDS_UNTITLED]);
return TRUE;
}
/*
* FFileOpen
*
* Purpose:
* Confirms that the user wants to open a new file and invokes the
* common dialog file open to get the filename, then reads the
* contents of the file. If the fImport flag is TRUE, then we
* import the contents of the file into the current document,
* not changing the document name or any of the UI.
*
* Parameters:
* pGlob LPGLOBALS to the global variable block.
* fImport BOOL indicates if we're importing from a file,
* not affecting the current filename.
*
* Return Value:
* BOOL TRUE if the function succeeded, FALSE otherwise.
*
*/
BOOL WINAPI FFileOpen(LPGLOBALS pGlob, BOOL fImport)
{
POLYLINE pl;
BOOL fOK;
LPSTR psz;
char szTemp[CCHPATHMAX];
LPSTR pszFile;
if (!fImport)
{
if (!FCleanVerify(pGlob))
return FALSE;
}
psz=(fImport) ? rgpsz[IDS_FILEIMPORT] : rgpsz[IDS_FILEOPEN];
//We have to use a temp for Import or else we'll wipe out a real filename.
pszFile=(fImport) ? (LPSTR)szTemp : (LPSTR)pGlob->szFile;
fOK=FSaveOpenDialog(pGlob->hWnd, pGlob->hInst, rgpsz[IDS_DEFEXT]
, rgpsz[IDS_FILEOPENFILTER], pszFile, psz, TRUE);
if (fOK)
{
//Attempt to read the file in and display it.
if (!FCosFileRead(pGlob, pszFile, &pl))
return FALSE;
#ifdef MAKEOLESERVER
if (!fImport)
PDocRevokeAndCreate(pOLE);
#endif //MAKEOLESERVER
SendMessage(pGlob->hWndPolyline, PLM_POLYLINESET,
TRUE, (LONG)(LPSTR)&pl);
if (!fImport)
{
WindowTitleSet(pGlob->hWnd, pszFile);
pGlob->fOLE=FALSE;
pGlob->fOpenFile=TRUE;
pGlob->fDirty=FALSE;
}
else
pGlob->fDirty=TRUE;
}
return fOK;
}
/*
* FFileSave
*
* Purpose:
* Writes the file to a known filename, requiring that the user has
* previously used FileOpen or FileSaveAs in order to have a filename.
*
* Parameters:
* pGlob LPGLOBALS to the global variable block.
*
* Return Value:
* BOOL TRUE if the function succeeded, FALSE otherwise.
*
*/
BOOL WINAPI FFileSave(LPGLOBALS pGlob)
{
POLYLINE pl;
#ifdef MAKEOLESERVER
OLESTATUS os;
//In OLE cases, this may be Update; call OleSavedServerDoc
if (pGlob->fOLE)
{
if (pOLE->pSvr->fLink)
{
SendMessage(pGlob->hWndPolyline, PLM_POLYLINEGET, 0,
(LONG)(LPSTR)&pl);
if (!FCosFileWrite(pGlob, pGlob->szFile, &pl))
return FALSE;
}
//This notifies the client for us.
os=OleSavedServerDoc(pOLE->pSvr->pDoc->lh);
pGlob->fDirty=(BOOL)(OLE_OK!=os);
return !pGlob->fDirty;
}
#endif //MAKEOLESERVER
if (!pGlob->fOpenFile)
return FFileSaveAs(pGlob);
SendMessage(pGlob->hWndPolyline, PLM_POLYLINEGET, 0, (LONG)(LPSTR)&pl);
if (!FCosFileWrite(pGlob, pGlob->szFile, &pl))
return FALSE;
pGlob->fOpenFile=TRUE;
pGlob->fDirty=FALSE;
return TRUE;
}
/*
* FFileSaveAs
*
* Purpose:
* Invokes the common dialog for Save As to get a filename then
* writes the polyline data to that file, creating if necessary.
*
* Parameters:
* pGlob LPGLOBALS to the global variable block.
*
* Return Value:
* BOOL TRUE if the function succeeded, FALSE otherwise.
*
*/
BOOL WINAPI FFileSaveAs(LPGLOBALS pGlob)
{
POLYLINE pl;
BOOL fOK;
fOK=FSaveOpenDialog(pGlob->hWnd, pGlob->hInst, rgpsz[IDS_DEFEXT]
, rgpsz[IDS_FILEOPENFILTER], pGlob->szFile, rgpsz[IDS_FILESAVEAS]
, FALSE);
if (fOK)
{
SendMessage(pGlob->hWndPolyline, PLM_POLYLINEGET
, 0, (LONG)(LPSTR)&pl);
fOK=FCosFileWrite(pGlob, pGlob->szFile, &pl);
#ifdef MAKEOLESERVER
/*
* In the Save Copy As case, when an object is embedded, we
* don't need to call Rename or Saved since we just saved a
* silent copy of the data.
*/
if (pGlob->fOLE && pOLE->pSvr->fEmbed)
return fOK;
if (fOK && pGlob->fOLE && pOLE->pSvr->fLink)
{
OleRenameServerDoc(pOLE->pSvr->pDoc->lh, pGlob->szFile);
OleSavedServerDoc(pOLE->pSvr->pDoc->lh);
}
#endif //MAKEOLESERVER
pGlob->fOpenFile=fOK;
WindowTitleSet(pGlob->hWnd, pGlob->szFile);
pGlob->fDirty=FALSE;
}
return fOK;
}
/*
* FFileExit
*
* Purpose:
* Handles the File/Exit menu command, verifying dirty files as necessary
* and revoking the server.
*
* Parameters:
* pGlob LPGLOBALS to the global variable block.
*
* Return Value:
* BOOL TRUE if the application can exit, FALSE otherwise.
*/
BOOL WINAPI FFileExit(LPGLOBALS pGlob)
{
BOOL fRet;
#ifdef MAKEOLESERVER
OLESTATUS os;
LHSERVER lhT;
#endif //MAKEOLESERVER
if (!FCleanVerify(pGlob))
return FALSE;
#ifdef MAKEOLESERVER
lhT=pOLE->pSvr->lh;
pOLE->pSvr->lh=0L;
os=OleRevokeServer(lhT);
if (OLE_WAIT_FOR_RELEASE==os)
{
pOLE->pSvr->fRelease=FALSE;
FOLEReleaseWait(&pOLE->pSvr->fRelease, lhT);
fRet=TRUE;
}
else
fRet=(OLE_OK==os);
#endif //MAKEOLESERVER
return fRet;
}