535 lines
13 KiB
C
535 lines
13 KiB
C
/*
|
|
OLE SERVER DEMO
|
|
File.c
|
|
|
|
This file contains file input/output functions for for the OLE server demo.
|
|
|
|
(c) Copyright Microsoft Corp. 1990 - 1992 All Rights Reserved
|
|
*/
|
|
|
|
|
|
|
|
#include <windows.h>
|
|
#include <commDlg.h>
|
|
#include <ole.h>
|
|
|
|
#include "srvrdemo.h"
|
|
|
|
// File signature stored in the file.
|
|
#define szSignature "ServerDemo"
|
|
#define cchSigLen (10+1)
|
|
|
|
// Delimiter for fields in the file
|
|
#define chDelim ':'
|
|
|
|
// Default file extension
|
|
#define szDefExt "sd1"
|
|
|
|
// File header structure
|
|
typedef struct
|
|
{
|
|
CHAR szSig [cchSigLen];
|
|
CHAR chDelim1;
|
|
VERSION version;
|
|
CHAR chDelim2;
|
|
CHAR rgfObjNums [cfObjNums+1];
|
|
} HEADER;
|
|
|
|
// BOOL GetFileSaveFilename (LPSTR lpszFilename);
|
|
static VOID InitOfn (OPENFILENAME *pofn);
|
|
static BOOL SaveDocIntoFile (PSTR);
|
|
static LPOBJ ReadObj (INT fh);
|
|
|
|
|
|
|
|
/* CreateDocFromFile
|
|
* -----------------
|
|
*
|
|
* Read a document from the specified file.
|
|
*
|
|
* LPSTR lpszDoc - Name of the file containing the document
|
|
* LHSERVERDOC lhdoc - Handle to the document
|
|
* DOCTYPE doctype - In what state the document is created
|
|
*
|
|
* RETURNS: TRUE if successful, FALSE otherwise
|
|
*
|
|
* CUSTOMIZATION: Re-implement
|
|
* This function will need to be completely re-implemented
|
|
* to support your application's file format.
|
|
*
|
|
*/
|
|
BOOL CreateDocFromFile (LPSTR lpszDoc, LHSERVERDOC lhdoc, DOCTYPE doctype)
|
|
{
|
|
INT fh; // File handle
|
|
HEADER hdr;
|
|
INT i;
|
|
|
|
if ((fh =_lopen(lpszDoc, OF_READ)) == -1)
|
|
return FALSE;
|
|
|
|
// Read header from file.
|
|
if (_lread(fh, (LPSTR) &hdr, (UINT)sizeof(HEADER)) < sizeof (HEADER))
|
|
goto Error;
|
|
|
|
// Check to see if file is a server demo file.
|
|
if (lstrcmp(hdr.szSig, szSignature))
|
|
goto Error;
|
|
|
|
if (hdr.chDelim1 != chDelim)
|
|
goto Error;
|
|
|
|
// Check to see if file was saved under the most recent version.
|
|
// Here is where you would handle reading in old versions.
|
|
if (hdr.version != version)
|
|
goto Error;
|
|
|
|
if (hdr.chDelim2 != chDelim)
|
|
goto Error;
|
|
|
|
if (!CreateNewDoc (lhdoc, lpszDoc, doctype))
|
|
goto Error;
|
|
|
|
// Get the array indicating which object numbers have been used.
|
|
for (i=1; i <= cfObjNums; i++)
|
|
docMain.rgfObjNums[i] = hdr.rgfObjNums[i];
|
|
|
|
// Read in object data.
|
|
for (i=0; ReadObj (fh); i++);
|
|
|
|
if (!i)
|
|
{
|
|
OLESTATUS olestatus;
|
|
|
|
fRevokeSrvrOnSrvrRelease = FALSE;
|
|
|
|
if ((olestatus = RevokeDoc()) > OLE_WAIT_FOR_RELEASE)
|
|
goto Error;
|
|
else if (olestatus == OLE_WAIT_FOR_RELEASE)
|
|
Wait (&fWaitingForDocRelease);
|
|
|
|
fRevokeSrvrOnSrvrRelease = TRUE;
|
|
EmbeddingModeOff();
|
|
goto Error;
|
|
}
|
|
|
|
_lclose(fh);
|
|
|
|
fDocChanged = FALSE;
|
|
return TRUE;
|
|
|
|
Error:
|
|
_lclose(fh);
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* OpenDoc
|
|
* -------
|
|
*
|
|
* Prompt the user for which document he wants to open
|
|
*
|
|
* RETURNS: TRUE if successful, FALSE otherwise.
|
|
*
|
|
* CUSTOMIZATION: None, except your application may or may not call
|
|
* CreateNewObj to create a default object.
|
|
*
|
|
*/
|
|
BOOL OpenDoc (VOID)
|
|
{
|
|
CHAR szDoc[cchFilenameMax];
|
|
BOOL fUpdateLater;
|
|
OLESTATUS olestatus;
|
|
|
|
if (SaveChangesOption (&fUpdateLater) == IDCANCEL)
|
|
return FALSE;
|
|
|
|
if (!GetFileOpenFilename (szDoc))
|
|
{
|
|
if (fUpdateLater)
|
|
{
|
|
// The user chose the "Yes, Update" button but the
|
|
// File Open dialog box failed for some reason
|
|
// (perhaps the user chose Cancel).
|
|
// Even though the user chose "Yes, Update", there is no way
|
|
// to update a client that does not accept updates
|
|
// except when the document is closed.
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
if (fUpdateLater)
|
|
{
|
|
// The non-standard OLE client did not accept the update when
|
|
// we requested it, so we are sending the client OLE_CLOSED now that
|
|
// we are closing the document.
|
|
SendDocMsg (OLE_CLOSED);
|
|
}
|
|
|
|
fRevokeSrvrOnSrvrRelease = FALSE;
|
|
|
|
if ((olestatus = RevokeDoc()) > OLE_WAIT_FOR_RELEASE)
|
|
return FALSE;
|
|
else if (olestatus == OLE_WAIT_FOR_RELEASE)
|
|
Wait (&fWaitingForDocRelease);
|
|
|
|
fRevokeSrvrOnSrvrRelease = TRUE;
|
|
EmbeddingModeOff();
|
|
|
|
if (!CreateDocFromFile (szDoc, 0, doctypeFromFile))
|
|
{
|
|
MessageBox (hwndMain,
|
|
"Reading from file failed.\r\nFile may not be in proper file format.",
|
|
szAppName,
|
|
MB_ICONEXCLAMATION | MB_OK);
|
|
// We already revoked the document, so give the user a new one to edit.
|
|
CreateNewDoc (0, "(Untitled)", doctypeNew);
|
|
CreateNewObj (FALSE);
|
|
return FALSE;
|
|
}
|
|
fDocChanged = FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
|
|
/* ReadObj
|
|
* --------
|
|
*
|
|
* Read the next object from a file, allocate memory for it, and return
|
|
* a pointer to it.
|
|
*
|
|
* int fh - File handle
|
|
*
|
|
* RETURNS: A pointer to the object
|
|
*
|
|
* CUSTOMIZATION: Server Demo specific
|
|
*
|
|
*/
|
|
static LPOBJ ReadObj (INT fh)
|
|
{
|
|
HANDLE hObj = NULL;
|
|
LPOBJ lpobj = NULL;
|
|
|
|
hObj = LocalAlloc (LMEM_MOVEABLE | LMEM_ZEROINIT, sizeof (OBJ));
|
|
|
|
if (hObj == NULL)
|
|
return NULL;
|
|
|
|
lpobj = (LPOBJ) LocalLock (hObj);
|
|
|
|
if (lpobj==NULL)
|
|
{
|
|
LocalFree (hObj);
|
|
return NULL;
|
|
}
|
|
|
|
if (_lread(fh, (LPSTR) &lpobj->native, (UINT)sizeof(NATIVE)) < sizeof (NATIVE))
|
|
{
|
|
LocalUnlock (hObj);
|
|
LocalFree (hObj);
|
|
return NULL;
|
|
}
|
|
|
|
lpobj->hObj = hObj;
|
|
lpobj->oleobject.lpvtbl = &objvtbl;
|
|
lpobj->aName = GlobalAddAtom (lpobj->native.szName);
|
|
|
|
if (!CreateWindow(
|
|
"ObjClass",
|
|
"Obj",
|
|
WS_THICKFRAME | WS_BORDER | WS_CHILD | WS_CLIPSIBLINGS | WS_VISIBLE ,
|
|
lpobj->native.nX,
|
|
lpobj->native.nY,
|
|
lpobj->native.nWidth,
|
|
lpobj->native.nHeight,
|
|
hwndMain,
|
|
NULL,
|
|
hInst,
|
|
(LPSTR) lpobj ))
|
|
{
|
|
LocalUnlock (hObj);
|
|
LocalFree (hObj);
|
|
return NULL;
|
|
}
|
|
|
|
return lpobj;
|
|
}
|
|
|
|
|
|
|
|
/* SaveDoc
|
|
* -------
|
|
*
|
|
* Save the document.
|
|
*
|
|
* CUSTOMIZATION: None
|
|
*
|
|
*/
|
|
|
|
BOOL SaveDoc (VOID)
|
|
{
|
|
if (docMain.doctype == doctypeNew)
|
|
return SaveDocAs();
|
|
else
|
|
{
|
|
CHAR szDoc [cchFilenameMax];
|
|
|
|
GlobalGetAtomName (docMain.aName, szDoc, cchFilenameMax);
|
|
return SaveDocIntoFile(szDoc);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/* SaveDocAs
|
|
* ---------
|
|
*
|
|
* Prompt the user for a filename, and save the document under that filename.
|
|
*
|
|
* RETURNS: TRUE if successful or user chose CANCEL
|
|
* FALSE if SaveDocIntoFile fails
|
|
*
|
|
* CUSTOMIZATION: None
|
|
*
|
|
*/
|
|
BOOL SaveDocAs (VOID)
|
|
{
|
|
CHAR szDoc[cchFilenameMax];
|
|
BOOL fUpdateLater;
|
|
CHAR szDocOld[cchFilenameMax];
|
|
|
|
// If document is embedded, give user a chance to update.
|
|
// Save old document name in case the save fails.
|
|
if (!GlobalGetAtomName (docMain.aName, szDocOld, cchFilenameMax))
|
|
ErrorBox ("Fatal Error: Document name is invalid.");
|
|
|
|
if (GetFileSaveFilename (szDoc))
|
|
|
|
{
|
|
|
|
if (docMain.doctype == doctypeEmbedded)
|
|
return SaveDocIntoFile(szDoc);
|
|
|
|
if (fUpdateLater)
|
|
{
|
|
// The non-standard OLE client did not accept the update when
|
|
// we requested it, so we are sending the client OLE_CLOSED now that
|
|
// we are closing the document.
|
|
SendDocMsg (OLE_CLOSED);
|
|
}
|
|
|
|
// Set the window title bar.
|
|
SetTitle (szDoc, FALSE);
|
|
OleRenameServerDoc(docMain.lhdoc, szDoc);
|
|
|
|
if (SaveDocIntoFile(szDoc))
|
|
return TRUE;
|
|
else
|
|
{ // Restore old name
|
|
SetTitle (szDocOld, FALSE);
|
|
OleRenameServerDoc(docMain.lhdoc, szDocOld);
|
|
return FALSE;
|
|
}
|
|
}
|
|
else // user chose Cancel
|
|
return FALSE;
|
|
// The user chose the "Yes, Update" button but the
|
|
// File Open dialog box failed for some reason
|
|
// (perhaps the user chose Cancel).
|
|
// Even though the user chose "Yes, Update", there is no way
|
|
// to update a non-standard OLE client that does not accept updates
|
|
// except when the document is closed.
|
|
}
|
|
|
|
|
|
|
|
/* SaveDocIntoFile
|
|
* ---------------
|
|
*
|
|
* Save the document into a file whose name is determined from docMain.aName.
|
|
*
|
|
* RETURNS: TRUE if successful
|
|
* FALSE otherwise
|
|
*
|
|
* CUSTOMIZATION: Re-implement
|
|
*
|
|
*/
|
|
static BOOL SaveDocIntoFile (PSTR pDoc)
|
|
{
|
|
HWND hwnd;
|
|
INT fh; // File handle
|
|
LPOBJ lpobj;
|
|
HEADER hdr;
|
|
INT i;
|
|
|
|
hwnd = GetWindow (hwndMain, GW_CHILD);
|
|
|
|
if (!hwnd)
|
|
{
|
|
ErrorBox ("Could not save NULL file.");
|
|
return FALSE;
|
|
}
|
|
|
|
// Get document name.
|
|
if ((fh =_lcreat(pDoc, 0)) == -1)
|
|
{
|
|
ErrorBox ("Could not save file.");
|
|
return FALSE;
|
|
}
|
|
|
|
// Fill in header.
|
|
lstrcpy (hdr.szSig, szSignature);
|
|
hdr.chDelim1 = chDelim;
|
|
hdr.version = version;
|
|
hdr.chDelim2 = chDelim;
|
|
for (i=1; i <= cfObjNums; i++)
|
|
hdr.rgfObjNums[i] = docMain.rgfObjNums[i];
|
|
|
|
// Write header to file.
|
|
if (_lwrite(fh, (LPSTR) &hdr, (UINT)sizeof(HEADER)) < sizeof(HEADER))
|
|
goto Error; // Error writing file header
|
|
|
|
// Write each object's native data.
|
|
while (hwnd)
|
|
{
|
|
lpobj = (LPOBJ) GetWindowLong (hwnd, ibLpobj);
|
|
if (_lwrite(fh, (LPSTR)&lpobj->native, (UINT)sizeof (NATIVE))
|
|
< sizeof(NATIVE))
|
|
goto Error; // Error writing file header
|
|
|
|
hwnd = GetWindow (hwnd, GW_HWNDNEXT);
|
|
}
|
|
_lclose(fh);
|
|
|
|
|
|
if (docMain.doctype != doctypeEmbedded)
|
|
{
|
|
docMain.doctype = doctypeFromFile;
|
|
OleSavedServerDoc(docMain.lhdoc);
|
|
fDocChanged = FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
Error:
|
|
_lclose(fh);
|
|
ErrorBox ("Could not save file.");
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Common Dialog functions */
|
|
|
|
|
|
/* InitOfn
|
|
* -------
|
|
*
|
|
* Initialize an OPENFILENAME structure with default values.
|
|
* OPENFILENAME is defined in CommDlg.h.
|
|
*
|
|
*
|
|
* CUSTOMIZATION: Change lpstrFilter. You may also customize the common
|
|
* dialog box if you wish. (See the Windows SDK documentation.)
|
|
*
|
|
*/
|
|
static VOID InitOfn (OPENFILENAME *pofn)
|
|
{
|
|
// GetOpenFileName or GetSaveFileName will put the 8.3 filename into
|
|
// szFileTitle[].
|
|
// SrvrDemo does not use this filename, but rather uses the fully qualified
|
|
// pathname in pofn->lpstrFile[].
|
|
static CHAR szFileTitle[13];
|
|
|
|
pofn->Flags = 0;
|
|
pofn->hInstance = hInst;
|
|
pofn->hwndOwner = hwndMain;
|
|
pofn->lCustData = 0;
|
|
pofn->lpfnHook = NULL;
|
|
pofn->lpstrCustomFilter = NULL;
|
|
pofn->lpstrDefExt = szDefExt;
|
|
// lpstrFile[] is the initial filespec that appears in the edit control.
|
|
// Must be set to non-NULL before calling the common dialog box function.
|
|
// On return, lpstrFile[] will contain the fully-qualified pathname
|
|
// corresponding to the file the user chose.
|
|
pofn->lpstrFile = NULL;
|
|
pofn->lpstrFilter = "Server Demo (*." szDefExt ")\0*." szDefExt "\0" ;
|
|
// lpstrFileTitle[] will contain the user's chosen filename without a path.
|
|
pofn->lpstrFileTitle = szFileTitle;
|
|
pofn->lpstrInitialDir= NULL;
|
|
// Title Bar. NULL means use default title.
|
|
pofn->lpstrTitle = NULL;
|
|
pofn->lpTemplateName = NULL;
|
|
pofn->lStructSize = sizeof (OPENFILENAME);
|
|
pofn->nFilterIndex = 1L;
|
|
pofn->nFileOffset = 0;
|
|
pofn->nFileExtension = 0;
|
|
pofn->nMaxFile = cchFilenameMax;
|
|
pofn->nMaxCustFilter = 0L;
|
|
}
|
|
|
|
|
|
|
|
|
|
/* GetFileOpenFilename
|
|
* -------------------
|
|
*
|
|
* Call the common dialog box function GetOpenFileName to get a file name
|
|
* from the user when the user chooses the "File Open" menu item.
|
|
*
|
|
* LPSTR lpszFilename - will contain the fully-qualified pathname on exit.
|
|
*
|
|
* RETURNS: TRUE if successful, FALSE otherwise.
|
|
*
|
|
* CUSTOMIZATION: None
|
|
*
|
|
*/
|
|
BOOL GetFileOpenFilename (LPSTR lpszFilename)
|
|
{
|
|
OPENFILENAME ofn;
|
|
InitOfn (&ofn);
|
|
ofn.Flags |= OFN_FILEMUSTEXIST | OFN_HIDEREADONLY;
|
|
// Create initial filespec.
|
|
wsprintf (lpszFilename, "*.%s", (LPSTR) szDefExt);
|
|
// Have the common dialog function return the filename in lpszFilename.
|
|
ofn.lpstrFile = lpszFilename;
|
|
if (!GetOpenFileName (&ofn))
|
|
return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
|
|
/* GetFileSaveFilename
|
|
* -------------------
|
|
*
|
|
* Call the common dialog box function GetSaveFileName to get a file name
|
|
* from the user when the user chooses the "File Save As" menu item, or the
|
|
* "File Save" menu item for an unnamed document.
|
|
*
|
|
* LPSTR lpszFilename - will contain the fully-qualified pathname on exit.
|
|
*
|
|
* RETURNS: TRUE if successful, FALSE otherwise.
|
|
*
|
|
* CUSTOMIZATION: None
|
|
*
|
|
*/
|
|
BOOL GetFileSaveFilename (LPSTR lpszFilename)
|
|
{
|
|
OPENFILENAME ofn;
|
|
InitOfn (&ofn);
|
|
ofn.Flags |= OFN_PATHMUSTEXIST | OFN_HIDEREADONLY;
|
|
// Create initial filespec.
|
|
wsprintf (lpszFilename, "*.%s", (LPSTR) szDefExt);
|
|
// Have the common dialog function return the filename in lpszFilename.
|
|
ofn.lpstrFile = lpszFilename;
|
|
if (!GetSaveFileName (&ofn))
|
|
return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
|