349 lines
11 KiB
C
349 lines
11 KiB
C
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/*
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* stream.c - io stream function callbacks
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*
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* Created by Microsoft Corporation.
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* (c) Copyright Microsoft Corp. 1990 - 1992 All Rights Reserved
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*/
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/***************************************************************************
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* This file contains all routines that directly and indirectly deal with
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* file i/o. The OLE stream call back functions exist in this file.
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**************************************************************************/
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//*** INCLUDES ***
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#include <windows.h>
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#include <ole.h>
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#include "global.h"
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#include "utility.h"
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#include "stream.h"
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#include "object.h"
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#include "demorc.h"
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//*** Globals ***
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BOOL fLoadFile = FALSE;
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/***************************************************************************
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* ReadStream() - OLE Callback Function (Get)
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*
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* This function is pointed to from the OLESTREAM vtbl; it is Get.
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*
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* returns DWORD - number of bytes actually read
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**************************************************************************/
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DWORD APIENTRY ReadStream( //* ENTRY:
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LPAPPSTREAM lpStream, //* application stream pointer
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LPSTR lpstr, //* string pointer
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DWORD cb //* byte count
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){
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return _lread(lpStream->fh, lpstr, cb);
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}
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/***************************************************************************
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* WriteStream() - OLE Callback function (Put)
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*
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* This function is pointed to from the OLESTREAM vtbl; it is Put.
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*
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* Returns DWORD - number of bytes actually written
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**************************************************************************/
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DWORD APIENTRY WriteStream( //* ENTRY:
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LPAPPSTREAM lpStream, //* application stream pointer
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LPSTR lpstr, //* string pointer
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DWORD cb //* number of bytes to write
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){
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return _lwrite(lpStream->fh, lpstr, cb);
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}
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/****************************************************************************
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* ReadFromFile()
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*
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* This function reads OLE objects from a file. If the document
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* contains manual links, the user will be prompted to update those links.
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*
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* Returns BOOL - TRUE if the read(s) were successful
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***************************************************************************/
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BOOL FAR ReadFromFile( //* ENTRY:
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LPAPPSTREAM lpStream, //* application stream pointer
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LHCLIENTDOC lhcDoc, //* document handle
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LPOLECLIENT lpClient //* pointer to OLE client structure
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){ //* LOCAL:
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BOOL bReturn = FALSE; //* return value
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INT cFileObjects; //* number of file objects
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Hourglass(TRUE);
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fLoadFile = TRUE;
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SetFilePointer((HANDLE)lpStream->fh, 0, NULL, 0);
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//* in the file
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if (_lread(lpStream->fh, (LPSTR)&cFileObjects, sizeof(INT)) < sizeof(INT))
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goto Error;
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for (; cFileObjects; --cFileObjects)
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{
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if (!ObjRead(lpStream,lhcDoc,lpClient))
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{
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ErrorMessage(E_FAILED_TO_READ_OBJECT);
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goto Error;
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}
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}
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ShowDoc(lhcDoc,1);
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UpdateLinks(lhcDoc);
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bReturn = TRUE; //* SUCCESS
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Error: //* ERROR Tag
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Hourglass(FALSE);
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fLoadFile = FALSE;
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return bReturn; //* return
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}
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/****************************************************************************
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* ObjRead()
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*
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* Rread an object from the specified file. The file pointer will
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* be advanced past the object.
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*
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* HANDLE fh - DOS file handle of file to be read from
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*
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* returns HWND - window handle to item window containing the OLE object
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***************************************************************************/
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BOOL FAR ObjRead( //* ENTRY:
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LPAPPSTREAM lpStream, //* application stream pointer
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LHCLIENTDOC lhcDoc, //* document handle
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LPOLECLIENT lpClient //* pointer to OLE client structure
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){ //* LOCAL:
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APPITEMPTR pItem; //* application item pointer
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LPOLEOBJECT lpObject; //* pointer ole object
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LONG otObject; //* type of object
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RECT rcObject; //* object rect
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CHAR szTmp[CBOBJNAMEMAX]; //* temporary string buffer
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CHAR szProto[PROTOCOL_STRLEN+1];//* protocol string
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INT i; //* index
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if (_lread(lpStream->fh, szTmp, CBOBJNAMEMAX) < CBOBJNAMEMAX )
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return FALSE;
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if (_lread(lpStream->fh, szProto, PROTOCOL_STRLEN) < PROTOCOL_STRLEN )
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return FALSE;
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for (i=0; szProto[i] != ' '; i++);
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szProto[i] = 0;
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ValidateName( szTmp );
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if (!(pItem = PreItemCreate(lpClient, TRUE, lhcDoc)))
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return FALSE;
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if (Error(OleLoadFromStream((LPOLESTREAM)&(lpStream->olestream),
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szProto,(LPOLECLIENT)&(pItem->oleclient), lhcDoc, szTmp, &lpObject)))
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goto Error;
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if (_lread(lpStream->fh, (LPSTR)&rcObject, sizeof(RECT)) < sizeof(RECT))
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goto Error;
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if (_lread(lpStream->fh, (LPSTR)&otObject, sizeof(LONG)) < sizeof(LONG))
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goto Error;
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if (PostItemCreate(lpObject, otObject, &rcObject, pItem))
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{
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pItem->fNew = TRUE;
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ObjSetBounds(pItem);
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return TRUE; //* SUCCESS return
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}
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else
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return FALSE;
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Error: //* ERROR Tag
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FreeAppItem(pItem);
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return FALSE;
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}
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/*************************************************************************
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* WriteToFile()
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*
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* Write current document to a file.
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*
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* returns BOOL - TRUE if file successfully written
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************************************************************************/
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BOOL FAR WriteToFile( //* ENTRY:
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LPAPPSTREAM lpStream //* application stream pointer
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){ //* LOCAL:
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INT iObjectsWritten=0; //* counter of objects written to file
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APPITEMPTR pItem; //* application Item pointer
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UpdateFromOpenServers();
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SetFilePointer((HANDLE)lpStream->fh, 0, NULL, 0);
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Hourglass(TRUE);
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if (_lwrite(lpStream->fh, (LPSTR)&iObjects, sizeof(INT)) < sizeof(INT))
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goto Error;
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for (pItem = GetTopItem(); pItem; pItem = GetNextItem(pItem))
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{
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if (!ObjWrite(lpStream, pItem))
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goto Error;
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iObjectsWritten++;
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}
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if (iObjectsWritten != iObjects)
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goto Error;
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Dirty(DOC_CLEAN);
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Hourglass(FALSE);
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return(TRUE); //* SUCCESS return
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Error: //* ERROR Tag
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Hourglass(FALSE);
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return(FALSE); //* ERROR return
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}
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/****************************************************************************
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* ObjWrite()
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*
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* This function writes an object to the specified
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* file. The file pointer will be advanced past the end of
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* the written object.
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* Returns BOOL - TRUE if object written successfully
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***************************************************************************/
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BOOL FAR ObjWrite( //* ENTRY:
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LPAPPSTREAM lpStream, //* application stream pointer
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APPITEMPTR pItem //* application item pointer
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){ //* LOCAL:
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POINT pt; //* center of rec point
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RECT rc; //* bounding rectangle
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UINT cbTmp = CBOBJNAMEMAX;
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CHAR szTmp[PROTOCOL_STRLEN];//* protocol string
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OleQueryName(pItem->lpObject, szTmp, &cbTmp);
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if (_lwrite(lpStream->fh, szTmp, CBOBJNAMEMAX) < CBOBJNAMEMAX )
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return FALSE;
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if (pItem->otObject == OT_STATIC)
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wsprintf(szTmp, "%-15s", STATICP);
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else
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wsprintf(szTmp, "%-15s", STDFILEEDITING);
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if (_lwrite(lpStream->fh, szTmp, PROTOCOL_STRLEN) < PROTOCOL_STRLEN )
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return FALSE;
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if (Error(OleSaveToStream(pItem->lpObject, (LPOLESTREAM)&(lpStream->olestream))))
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return FALSE;
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GetClientRect(pItem->hwnd, (LPRECT)&rc);
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pt = *(LPPOINT)&rc;
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ClientToScreen(pItem->hwnd, (LPPOINT)&pt);
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ScreenToClient(hwndFrame, (LPPOINT)&pt);
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OffsetRect(
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&rc,
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pt.x - rc.left - GetSystemMetrics(SM_CXFRAME),
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pt.y - rc.top - GetSystemMetrics(SM_CYFRAME)
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);
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if (_lwrite(lpStream->fh, (LPSTR)&rc, sizeof(RECT)) < sizeof(RECT)
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|| _lwrite(lpStream->fh, (LPSTR)&(pItem->otObject), sizeof(LONG)) < sizeof(LONG))
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return FALSE;
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return TRUE; //* SUCCESS return
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}
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/****************************************************************************
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* UpdateLinks()
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*
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* Get the most up to date rendering information and show it.
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***************************************************************************/
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static VOID UpdateLinks( //* ENTRY
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LHCLIENTDOC lhcDoc //* client document handle
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){ //* LOCAL:
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INT i=0; //* index
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APPITEMPTR pItem; //* temporary item pointer
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CHAR szUpdate[CBMESSAGEMAX];//* update message?
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for (pItem = GetTopItem(); pItem; pItem = GetNextItem(pItem))
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{
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if (pItem->lhcDoc == lhcDoc && pItem->otObject == OT_LINK)
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{
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if (!i)
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{
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LoadString(hInst, IDS_UPDATELINKS, szUpdate, CBMESSAGEMAX);
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if (MessageBox(hwndFrame, szUpdate, szAppName,
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MB_YESNO | MB_ICONEXCLAMATION) != IDYES)
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break;
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i++;
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}
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Error(OleUpdate(pItem->lpObject));
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}
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}
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WaitForAllObjects();
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}
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/****************************************************************************
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* UpdateFromOpenServers()
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*
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* Get the most up to date rendering information before storing it.
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***************************************************************************/
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static VOID UpdateFromOpenServers(VOID)
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{ //* LOCAL:
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APPITEMPTR pItem; //* temporary item pointer
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APPITEMPTR pItemNext;
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for (pItem = GetTopItem(); pItem; pItem = pItemNext)
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{
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pItemNext = GetNextItem(pItem);
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if (pItem->otObject == OT_EMBEDDED ||
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(pItem->uoObject == oleupdate_oncall
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&& pItem->otObject == OT_LINK ))
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if (OleQueryOpen(pItem->lpObject) == OLE_OK)
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{
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CHAR szMessage[2*CBMESSAGEMAX];
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CHAR szBuffer[CBMESSAGEMAX];
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UINT cb = CBOBJNAMEMAX; //* The name will be the server window title.
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CHAR szTmp[CBOBJNAMEMAX]; //* when the object is edited.
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Error(OleQueryName(pItem->lpObject,szTmp,&cb));
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LoadString(hInst, IDS_UPDATE_OBJ, szBuffer, CBMESSAGEMAX);
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wsprintf(szMessage, szBuffer, (LPSTR)szTmp);
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if (MessageBox(hwndFrame, szMessage, szAppName, MB_YESNO | MB_ICONEXCLAMATION) == IDYES)
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{
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Error(OleUpdate(pItem->lpObject));
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WaitForObject(pItem);
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}
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if (!pItem->fVisible)
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ObjDelete(pItem, OLE_OBJ_DELETE);
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}
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}
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WaitForAllObjects();
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}
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