232 lines
8.3 KiB
C
232 lines
8.3 KiB
C
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/*
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+-------------------------------------------------------------------------+
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| MDI Text File Viewer - File IO Routines |
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+-------------------------------------------------------------------------+
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| (c) Copyright 1994 |
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| Microsoft Corp. |
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| All rights reserved |
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| Program : [mpfile.c] |
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| Programmer : Arthur Hanson |
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| Original Program Date : [Jul 27, 1993 |
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| Last Update : [Jul 30, 1993] Time : 18:30 |
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| Version: 0.10 |
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| Description: |
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| History: |
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| arth Jul 27, 1993 0.10 Original Version. |
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+-------------------------------------------------------------------------+
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*/
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#include "LogView.h"
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#include <fcntl.h>
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#include <SYS\types.h>
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#include <SYS\stat.h>
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#include <io.h>
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#include <string.h>
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VOID APIENTRY GetFileName(HWND hwnd, PSTR);
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OFSTRUCT of;
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/*+-------------------------------------------------------------------------+
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| AlreadyOpen() |
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| Checks to see if a file is already opened. Returns a handle to |
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| the file's window if it is opened, otherwise NULL. |
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+-------------------------------------------------------------------------+*/
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HWND AlreadyOpen(CHAR *szFile) {
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INT iDiff;
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HWND hwndCheck;
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CHAR szChild[64];
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LPSTR lpChild, lpFile;
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HFILE wFileTemp;
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// Open the file with the OF_PARSE flag to obtain the fully qualified
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// pathname in the OFSTRUCT structure.
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wFileTemp = OpenFile((LPSTR)szFile, (LPOFSTRUCT)&of, OF_PARSE);
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if (! wFileTemp)
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return(NULL);
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_lclose(wFileTemp);
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// Check each MDI child window in LogView
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for ( hwndCheck = GetWindow(hwndMDIClient, GW_CHILD);
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hwndCheck;
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hwndCheck = GetWindow(hwndCheck, GW_HWNDNEXT) ) {
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// Initialization for comparison
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lpChild = szChild;
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lpFile = (LPSTR)AnsiUpper((LPSTR) of.szPathName);
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iDiff = 0;
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// Skip icon title windows
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if (GetWindow(hwndCheck, GW_OWNER))
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continue;
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// Get current child window's name
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GetWindowText(hwndCheck, lpChild, 64);
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// Compare window name with given name
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while ((*lpChild) && (*lpFile) && (!iDiff)) {
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if (*lpChild++ != *lpFile++)
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iDiff = 1;
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}
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// If the two names matched, the file is already open - return handle to matching
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// child window.
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if (!iDiff)
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return(hwndCheck);
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}
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// No match found -- file is not open -- return NULL handle
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return(NULL);
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} // AlreadyOpen
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/*+-------------------------------------------------------------------------+
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| AddFile() |
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| Create a new MDI Window, and loads specified file into Window. |
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+-------------------------------------------------------------------------+*/
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HWND APIENTRY AddFile(CHAR * pName) {
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HWND hwnd;
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CHAR sz[160];
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MDICREATESTRUCT mcs;
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if (!pName) {
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// The pName parameter is NULL -- load the "Untitled" string from STRINGTABLE
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// and set the title field of the MDI CreateStruct.
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LoadString (hInst, IDS_UNTITLED, sz, sizeof(sz));
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mcs.szTitle = (LPSTR)sz;
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}
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else
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// Title the window with the fully qualified pathname obtained by calling
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// OpenFile() with the OF_PARSE flag (in function AlreadyOpen(), which is called
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// before AddFile().
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mcs.szTitle = pName;
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mcs.szClass = szChild;
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mcs.hOwner = hInst;
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// Use the default size for the window
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mcs.x = mcs.cx = CW_USEDEFAULT;
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mcs.y = mcs.cy = CW_USEDEFAULT;
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// Set the style DWORD of the window to default
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mcs.style = 0L;
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// tell the MDI Client to create the child
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hwnd = (HWND)SendMessage (hwndMDIClient,
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WM_MDICREATE,
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0,
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(LONG_PTR)(LPMDICREATESTRUCT)&mcs);
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// Did we get a file? Read it into the window
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if (pName){
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if (!LoadFile(hwnd, pName)){
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// File couldn't be loaded -- close window
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SendMessage(hwndMDIClient, WM_MDIDESTROY, (DWORD_PTR) hwnd, 0L);
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}
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}
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return hwnd;
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} // AddFile
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/*+-------------------------------------------------------------------------+
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| LoadFile() |
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| Loads file into specified MDI window's edit control. |
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+-------------------------------------------------------------------------+*/
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INT APIENTRY LoadFile ( HWND hwnd, CHAR * pName) {
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LONG wLength;
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HANDLE hT;
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LPSTR lpB;
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HWND hwndEdit;
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HFILE fh;
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OFSTRUCT of;
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hwndEdit = (HWND)GetWindowLong (hwnd, GWL_HWNDEDIT);
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// The file has a title, so reset the UNTITLED flag.
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SetWindowWord(hwnd, GWW_UNTITLED, FALSE);
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fh = OpenFile(pName, &of, OF_READ); // JAP was 0, which is OF_READ)
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// Make sure file has been opened correctly
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if ( fh < 0 )
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goto error;
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// Find the length of the file
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wLength = (DWORD)_llseek(fh, 0L, 2);
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_llseek(fh, 0L, 0);
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// Attempt to reallocate the edit control's buffer to the file size
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hT = (HANDLE)SendMessage (hwndEdit, EM_GETHANDLE, 0, 0L);
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if (LocalReAlloc(hT, wLength+1, LHND) == NULL) {
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// Couldn't reallocate to new size -- error
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_lclose(fh);
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goto error;
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}
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// read the file into the buffer
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if (wLength != (LONG)_lread(fh, (lpB = (LPSTR)LocalLock (hT)), (UINT)wLength))
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MPError (hwnd, MB_OK|MB_ICONHAND, IDS_CANTREAD, (LPSTR)pName);
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// Zero terminate the edit buffer
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lpB[wLength] = 0;
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LocalUnlock (hT);
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SendMessage (hwndEdit, EM_SETHANDLE, (UINT_PTR)hT, 0L);
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_lclose(fh);
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return TRUE;
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error:
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// Report the error and quit
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MPError(hwnd, MB_OK | MB_ICONHAND, IDS_CANTOPEN, (LPSTR)pName);
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return FALSE;
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} // LoadFile
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/*+-------------------------------------------------------------------------+
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| MyReadFile() |
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| Asks user for a filename. |
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+-------------------------------------------------------------------------+*/
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VOID APIENTRY MyReadFile(HWND hwnd) {
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CHAR szFile[128];
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HWND hwndFile;
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GetFileName (hwnd, szFile);
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// If the result is not the empty string -- take appropriate action
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if (*szFile) {
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// Is file already open??
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if (hwndFile = AlreadyOpen(szFile)) {
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// Yes -- bring the file's window to the top
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BringWindowToTop(hwndFile);
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}
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else {
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// No -- make a new window and load file into it
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AddFile(szFile);
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}
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}
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UNREFERENCED_PARAMETER(hwnd);
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} // MyReadFile
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