windows/winhelp.c

   1 /*
   2  * Windows Help
   3  */
   4
   5 #include <stdlib.h>
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <unistd.h>
   9 #include "debugtools.h"
  10 #include "windef.h"
  11 #include "wingdi.h"
  12 #include "wine/winuser16.h"
  13 #include "wine/winbase16.h"
  14 #include "heap.h"
  15 #include "ldt.h"
  16
  17 DEFAULT_DEBUG_CHANNEL(win);
  18
  19
  20 /* WinHelp internal structure */
  21 typedef struct
  22 {
  23     WORD size;
  24     WORD command;
  25     LONG data;
  26     LONG reserved;
  27     WORD ofsFilename;
  28     WORD ofsData;
  29 } WINHELP,*LPWINHELP;
  30
  31 /**********************************************************************
  32  *             WinHelp16   (USER.171)
  33  */
  34 BOOL16 WINAPI WinHelp16( HWND16 hWnd, LPCSTR lpHelpFile, UINT16 wCommand,
  35                          DWORD dwData )
  36 {
  37   BOOL ret;
  38   DWORD mutex_count;
  39
  40   /* We might call WinExec() */
  41   ReleaseThunkLock( &mutex_count );
  42
  43   if (!(ret = WinHelpA( hWnd, lpHelpFile, wCommand, (DWORD)PTR_SEG_TO_LIN(dwData) )))
  44   {
  45       /* try to start the 16-bit winhelp */
  46       if (WinExec( "winhelp.exe -x", SW_SHOWNORMAL ) >= 32)
  47       {
  48           Yield16();
  49           ret = WinHelpA( hWnd, lpHelpFile, wCommand, (DWORD)PTR_SEG_TO_LIN(dwData) );
  50       }
  51   }
  52
  53   RestoreThunkLock( mutex_count );
  54   return ret;
  55 }
  56
  57
  58 /**********************************************************************
  59  *             WinHelpA   (USER32.579)
  60  */
  61 BOOL WINAPI WinHelpA( HWND hWnd, LPCSTR lpHelpFile, UINT wCommand,
  62                           DWORD dwData )
  63 {
  64         static WORD WM_WINHELP = 0;
  65         HWND hDest;
  66         LPWINHELP lpwh;
  67         HGLOBAL16 hwh;
  68         int size,dsize,nlen;
  69
  70
  71         if(!WM_WINHELP)
  72           {
  73             WM_WINHELP=RegisterWindowMessageA("WM_WINHELP");
  74             if(!WM_WINHELP)
  75               return FALSE;
  76           }
  77
  78         hDest = FindWindowA( "MS_WINHELP", NULL );
  79         if(!hDest) {
  80           if(wCommand == HELP_QUIT) return TRUE;
  81           if (WinExec ( "winhlp32.exe -x", SW_SHOWNORMAL ) < 32) {
  82               FIXME("cant start winhlp32.exe -x?\n");
  83               return FALSE;
  84           }
  85           if ( ! ( hDest = FindWindowA ( "MS_WINHELP", NULL ) )) {
  86               FIXME("did not find MS_WINHELP\n");
  87               return FALSE;
  88           }
  89         }
  90
  91
  92         switch(wCommand)
  93         {
  94                 case HELP_CONTEXT:
  95                 case HELP_SETCONTENTS:
  96                 case HELP_CONTENTS:
  97                 case HELP_CONTEXTPOPUP:
  98                 case HELP_FORCEFILE:
  99                 case HELP_HELPONHELP:
 100                 case HELP_FINDER:
 101                 case HELP_QUIT:
 102                         dsize=0;
 103                         break;
 104                 case HELP_KEY:
 105                 case HELP_PARTIALKEY:
 106                 case HELP_COMMAND:
 107                         dsize = dwData ? strlen( (LPSTR)dwData )+1: 0;
 108                         break;
 109                 case HELP_MULTIKEY:
 110                         dsize = ((LPMULTIKEYHELPA)dwData)->mkSize;
 111                         break;
 112                 case HELP_SETWINPOS:
 113                         dsize = ((LPHELPWININFOA)dwData)->wStructSize;
 114                         break;
 115                 default:
 116                         FIXME("Unknown help command %d\n",wCommand);
 117                         return FALSE;
 118         }
 119         if(lpHelpFile)
 120                 nlen = strlen(lpHelpFile)+1;
 121         else
 122                 nlen = 0;
 123         size = sizeof(WINHELP) + nlen + dsize;
 124         hwh = GlobalAlloc16(0,size);
 125         lpwh = GlobalLock16(hwh);
 126         lpwh->size = size;
 127         lpwh->command = wCommand;
 128         lpwh->data = dwData;
 129         if(nlen) {
 130                 strcpy(((char*)lpwh) + sizeof(WINHELP),lpHelpFile);
 131                 lpwh->ofsFilename = sizeof(WINHELP);
 132         } else
 133                 lpwh->ofsFilename = 0;
 134         if(dsize) {
 135                 memcpy(((char*)lpwh)+sizeof(WINHELP)+nlen,(LPSTR)dwData,dsize);
 136                 lpwh->ofsData = sizeof(WINHELP)+nlen;
 137         } else
 138                 lpwh->ofsData = 0;
 139         GlobalUnlock16(hwh);
 140         return SendMessage16(hDest,WM_WINHELP,hWnd,hwh);
 141 }
 142
 143
 144 /**********************************************************************
 145  *             WinHelpW   (USER32.580)
 146  */
 147 BOOL WINAPI WinHelpW( HWND hWnd, LPCWSTR helpFile, UINT command,
 148                           DWORD dwData )
 149 {
 150     LPSTR file = HEAP_strdupWtoA( GetProcessHeap(), 0, helpFile );
 151     BOOL ret = WinHelpA( hWnd, file, command, dwData );
 152     HeapFree( GetProcessHeap(), 0, file );
 153     return ret;
 154 }