reactos/lib/user32/misc/winhelp.c

   1 /*
   2  *  ReactOS kernel
   3  *  Copyright (C) 1998, 1999, 2000, 2001, 2002 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 /* $Id$
  20  *
  21  * PROJECT:         ReactOS user32.dll
  22  * FILE:            lib/user32/misc/winhelp.c
  23  * PURPOSE:         WinHelp
  24  * PROGRAMMER:      Robert Dickenson(robd@reactos.org)
  25  * UPDATE HISTORY:
  26  *      23-08-2002  RDD  Created from wine sources
  27  */
  28
  29 /* INCLUDES ******************************************************************/
  30
  31 #include "user32.h"
  32 #include <string.h>
  33 #include <debug.h>
  34
  35 /* WinHelp internal structure */
  36 typedef struct
  37 {
  38     WORD size;
  39     WORD command;
  40     LONG data;
  41     LONG reserved;
  42     WORD ofsFilename;
  43     WORD ofsData;
  44 } WINHELP,*LPWINHELP;
  45
  46
  47 /* FUNCTIONS *****************************************************************/
  48
  49 /*
  50  * @unimplemented
  51  */
  52 BOOL
  53 STDCALL
  54 WinHelpA(HWND hWnd, LPCSTR lpszHelp, UINT uCommand, DWORD dwData)
  55 {
  56         static WORD WM_WINHELP = 0;
  57         HWND hDest;
  58         LPWINHELP lpwh;
  59         HGLOBAL hwh;
  60         int size,dsize,nlen;
  61
  62         if (!WM_WINHELP) {
  63             WM_WINHELP = RegisterWindowMessageA("WM_WINHELP");
  64             if (!WM_WINHELP)
  65               return FALSE;
  66     }
  67
  68         hDest = FindWindowA("MS_WINHELP", NULL);
  69         if (!hDest) {
  70             if (uCommand == HELP_QUIT) return TRUE;
  71         if (WinExec("winhlp32.exe -x", SW_SHOWNORMAL) < 32) {
  72             //ERR("can't start winhlp32.exe -x ?\n");
  73             return FALSE;
  74         }
  75             if (!(hDest = FindWindowA("MS_WINHELP", NULL))) {
  76                 //FIXME("did not find MS_WINHELP (FindWindow() failed, maybe global window handling still unimplemented)\n");
  77                 return FALSE;
  78         }
  79     }
  80         switch (uCommand) {
  81                 case HELP_CONTEXT:
  82                 case HELP_SETCONTENTS:
  83                 case HELP_CONTENTS:
  84                 case HELP_CONTEXTPOPUP:
  85                 case HELP_FORCEFILE:
  86                 case HELP_HELPONHELP:
  87                 case HELP_FINDER:
  88                 case HELP_QUIT:
  89                         dsize=0;
  90                         break;
  91                 case HELP_KEY:
  92                 case HELP_PARTIALKEY:
  93                 case HELP_COMMAND:
  94                         dsize = dwData ? strlen( (LPSTR)dwData )+1: 0;
  95                         break;
  96                 case HELP_MULTIKEY:
  97                         dsize = ((LPMULTIKEYHELPA)dwData)->mkSize;
  98                         break;
  99                 case HELP_SETWINPOS:
 100                         dsize = ((LPHELPWININFOA)dwData)->wStructSize;
 101                         break;
 102                 default:
 103                         //FIXME("Unknown help command %d\n",uCommand);
 104                         return FALSE;
 105         }
 106         if (lpszHelp)
 107                 nlen = strlen(lpszHelp)+1;
 108         else
 109                 nlen = 0;
 110         size = sizeof(WINHELP) + nlen + dsize;
 111         hwh = GlobalAlloc(0,size);
 112         lpwh = GlobalLock(hwh);
 113         lpwh->size = size;
 114         lpwh->command = uCommand;
 115         lpwh->data = dwData;
 116         if (nlen) {
 117                 strcpy(((char*)lpwh) + sizeof(WINHELP), lpszHelp);
 118                 lpwh->ofsFilename = sizeof(WINHELP);
 119         } else {
 120                 lpwh->ofsFilename = 0;
 121         }
 122         if (dsize) {
 123                 memcpy(((char*)lpwh)+sizeof(WINHELP)+nlen,(LPSTR)dwData,dsize);
 124                 lpwh->ofsData = sizeof(WINHELP)+nlen;
 125         } else {
 126                 lpwh->ofsData = 0;
 127         }
 128         GlobalUnlock(hwh);
 129         return SendMessageA(hDest, WM_WINHELP, (WPARAM)hWnd, (LPARAM)hwh);
 130 }
 131
 132
 133 /*
 134  * @unimplemented
 135  */
 136 BOOL
 137 STDCALL
 138 WinHelpW(HWND hWnd, LPCWSTR lpszHelp, UINT uCommand, DWORD dwData)
 139 {
 140     INT len;
 141     LPSTR file;
 142     BOOL ret = FALSE;
 143
 144     if (!lpszHelp) return WinHelpA(hWnd, NULL, uCommand, dwData);
 145
 146     len = WideCharToMultiByte(CP_ACP, 0, lpszHelp, -1, NULL, 0, NULL, NULL);
 147     if ((file = HeapAlloc(GetProcessHeap(), 0, len))) {
 148         WideCharToMultiByte(CP_ACP, 0, lpszHelp, -1, file, len, NULL, NULL);
 149         ret = WinHelpA(hWnd, file, uCommand, dwData);
 150         HeapFree(GetProcessHeap(), 0, file);
 151     }
 152     return ret;
 153 }
 154