controls/desktop.c

   1 /*
   2  * Desktop window class.
   3  *
   4  * Copyright 1994 Alexandre Julliard
   5  */
   6
   7 #include <stdio.h>
   8 #include <string.h>
   9 #include <unistd.h>
  10
  11 #include "windef.h"
  12 #include "wingdi.h"
  13 #include "heap.h"
  14 #include "user.h"
  15 #include "win.h"
  16 #include "controls.h"
  17 #include "wine/winuser16.h"
  18
  19 typedef struct
  20 {
  21     HBRUSH        hbrushPattern;
  22     HBITMAP       hbitmapWallPaper;
  23     SIZE          bitmapSize;
  24     BOOL          fTileWallPaper;
  25 } DESKTOP;
  26
  27 static LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam );
  28
  29
  30 /*********************************************************************
  31  * desktop class descriptor
  32  */
  33 const struct builtin_class_descr DESKTOP_builtin_class =
  34 {
  35     DESKTOP_CLASS_ATOM,   /* name */
  36     CS_GLOBALCLASS,       /* style */
  37     NULL,                 /* procA (winproc is Unicode only) */
  38     DesktopWndProc,       /* procW */
  39     sizeof(DESKTOP),      /* extra */
  40     IDC_ARROWA,           /* cursor */
  41     COLOR_BACKGROUND+1    /* brush */
  42 };
  43
  44
  45 /***********************************************************************
  46  *           DESKTOP_LoadBitmap
  47  *
  48  * Load a bitmap from a file. Used by SetDeskWallPaper().
  49  */
  50 static HBITMAP DESKTOP_LoadBitmap( HDC hdc, const char *filename )
  51 {
  52     BITMAPFILEHEADER *fileHeader;
  53     BITMAPINFO *bitmapInfo;
  54     HBITMAP hbitmap;
  55     HFILE file;
  56     LPSTR buffer;
  57     LONG size;
  58
  59     /* Read all the file into memory */
  60
  61     if ((file = _lopen( filename, OF_READ )) == HFILE_ERROR)
  62     {
  63         UINT len = GetWindowsDirectoryA( NULL, 0 );
  64         if (!(buffer = HeapAlloc( GetProcessHeap(), 0,
  65                                   len + strlen(filename) + 2 )))
  66             return 0;
  67         GetWindowsDirectoryA( buffer, len + 1 );
  68         strcat( buffer, "\\" );
  69         strcat( buffer, filename );
  70         file = _lopen( buffer, OF_READ );
  71         HeapFree( GetProcessHeap(), 0, buffer );
  72     }
  73     if (file == HFILE_ERROR) return 0;
  74     size = _llseek( file, 0, 2 );
  75     if (!(buffer = HeapAlloc( GetProcessHeap(), 0, size )))
  76     {
  77         _lclose( file );
  78         return 0;
  79     }
  80     _llseek( file, 0, 0 );
  81     size = _lread( file, buffer, size );
  82     _lclose( file );
  83     fileHeader = (BITMAPFILEHEADER *)buffer;
  84     bitmapInfo = (BITMAPINFO *)(buffer + sizeof(BITMAPFILEHEADER));
  85
  86       /* Check header content */
  87     if ((fileHeader->bfType != 0x4d42) || (size < fileHeader->bfSize))
  88     {
  89         HeapFree( GetProcessHeap(), 0, buffer );
  90         return 0;
  91     }
  92     hbitmap = CreateDIBitmap( hdc, &bitmapInfo->bmiHeader, CBM_INIT,
  93                                 buffer + fileHeader->bfOffBits,
  94                                 bitmapInfo, DIB_RGB_COLORS );
  95     HeapFree( GetProcessHeap(), 0, buffer );
  96     return hbitmap;
  97 }
  98
  99
 100 /***********************************************************************
 101  *           DESKTOP_DoEraseBkgnd
 102  *
 103  * Handle the WM_ERASEBKGND message.
 104  */
 105 static LRESULT DESKTOP_DoEraseBkgnd( HWND hwnd, HDC hdc,
 106                                      DESKTOP *desktopPtr )
 107 {
 108     RECT rect;
 109     WND*   Wnd = WIN_FindWndPtr( hwnd );
 110
 111     if (Wnd->hrgnUpdate > 1) DeleteObject( Wnd->hrgnUpdate );
 112     Wnd->hrgnUpdate = 0;
 113
 114     WIN_ReleaseWndPtr(Wnd);
 115
 116     GetClientRect( hwnd, &rect );
 117
 118     /* Paint desktop pattern (only if wall paper does not cover everything) */
 119
 120     if (!desktopPtr->hbitmapWallPaper ||
 121         (!desktopPtr->fTileWallPaper && ((desktopPtr->bitmapSize.cx < rect.right) ||
 122          (desktopPtr->bitmapSize.cy < rect.bottom))))
 123     {
 124         HBRUSH brush = desktopPtr->hbrushPattern;
 125         if (!brush) brush = GetClassLongA( hwnd, GCL_HBRBACKGROUND );
 126           /* Set colors in case pattern is a monochrome bitmap */
 127         SetBkColor( hdc, RGB(0,0,0) );
 128         SetTextColor( hdc, GetSysColor(COLOR_BACKGROUND) );
 129         FillRect( hdc, &rect, brush );
 130     }
 131
 132       /* Paint wall paper */
 133
 134     if (desktopPtr->hbitmapWallPaper)
 135     {
 136         INT x, y;
 137         HDC hMemDC = CreateCompatibleDC( hdc );
 138
 139         SelectObject( hMemDC, desktopPtr->hbitmapWallPaper );
 140
 141         if (desktopPtr->fTileWallPaper)
 142         {
 143             for (y = 0; y < rect.bottom; y += desktopPtr->bitmapSize.cy)
 144                 for (x = 0; x < rect.right; x += desktopPtr->bitmapSize.cx)
 145                     BitBlt( hdc, x, y, desktopPtr->bitmapSize.cx,
 146                               desktopPtr->bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
 147         }
 148         else
 149         {
 150             x = (rect.left + rect.right - desktopPtr->bitmapSize.cx) / 2;
 151             y = (rect.top + rect.bottom - desktopPtr->bitmapSize.cy) / 2;
 152             if (x < 0) x = 0;
 153             if (y < 0) y = 0;
 154             BitBlt( hdc, x, y, desktopPtr->bitmapSize.cx,
 155                       desktopPtr->bitmapSize.cy, hMemDC, 0, 0, SRCCOPY );
 156         }
 157         DeleteDC( hMemDC );
 158     }
 159
 160     return 1;
 161 }
 162
 163
 164 /***********************************************************************
 165  *           DesktopWndProc_locked
 166  *
 167  * Window procedure for the desktop window.
 168  */
 169 static inline LRESULT WINAPI DesktopWndProc_locked( WND *wndPtr, UINT message,
 170                                WPARAM wParam, LPARAM lParam )
 171 {
 172     DESKTOP *desktopPtr = (DESKTOP *)wndPtr->wExtra;
 173     HWND hwnd = wndPtr->hwndSelf;
 174
 175       /* Most messages are ignored (we DON'T call DefWindowProc) */
 176
 177     switch(message)
 178     {
 179         /* Warning: this message is sent directly by                     */
 180         /* WIN_CreateDesktopWindow() and does not contain a valid lParam */
 181     case WM_NCCREATE:
 182         desktopPtr->hbrushPattern = 0;
 183         desktopPtr->hbitmapWallPaper = 0;
 184         SetDeskPattern();
 185         SetDeskWallPaper( (LPSTR)-1 );
 186         return  1;
 187
 188     case WM_ERASEBKGND:
 189         if(!USER_Driver.pIsSingleWindow())
 190             return  1;
 191         return  DESKTOP_DoEraseBkgnd( hwnd, (HDC)wParam, desktopPtr );
 192
 193     case WM_SYSCOMMAND:
 194         if ((wParam & 0xfff0) != SC_CLOSE)
 195             return  0;
 196         ExitWindows16( 0, 0 );
 197
 198     case WM_SETCURSOR:
 199         return  (LRESULT)SetCursor( LoadCursorA( 0, IDC_ARROWA ) );
 200     }
 201
 202     return 0;
 203 }
 204
 205 /***********************************************************************
 206  *           DesktopWndProc
 207  *
 208  * This is just a wrapper for the DesktopWndProc which does windows
 209  * locking and unlocking.
 210  */
 211 static LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
 212 {
 213     WND *wndPtr = WIN_FindWndPtr( hwnd );
 214     LRESULT retvalue = DesktopWndProc_locked(wndPtr,message,wParam,lParam);
 215
 216     WIN_ReleaseWndPtr(wndPtr);
 217     return retvalue;
 218 }
 219
 220 /***********************************************************************
 221  *           PaintDesktop   (USER32.415)
 222  *
 223  */
 224 BOOL WINAPI PaintDesktop(HDC hdc)
 225 {
 226     BOOL retvalue;
 227     HWND hwnd = GetDesktopWindow();
 228     WND *wndPtr = WIN_FindWndPtr( hwnd );
 229     DESKTOP *desktopPtr = (DESKTOP *)wndPtr->wExtra;
 230     retvalue = DESKTOP_DoEraseBkgnd( hwnd, hdc, desktopPtr );
 231     WIN_ReleaseWndPtr(wndPtr);
 232     return retvalue;
 233
 234 }
 235
 236 /***********************************************************************
 237  *           SetDeskPattern   (USER.279)
 238  */
 239 BOOL16 WINAPI SetDeskPattern(void)
 240 {
 241     char buffer[100];
 242     GetProfileStringA( "desktop", "Pattern", "(None)", buffer, 100 );
 243     return DESKTOP_SetPattern( buffer );
 244 }
 245
 246
 247 /***********************************************************************
 248  *           SetDeskWallPaper16   (USER.285)
 249  */
 250 BOOL16 WINAPI SetDeskWallPaper16( LPCSTR filename )
 251 {
 252     return SetDeskWallPaper( filename );
 253 }
 254
 255
 256 /***********************************************************************
 257  *           SetDeskWallPaper   (USER32.475)
 258  *
 259  * FIXME: is there a unicode version?
 260  */
 261 BOOL WINAPI SetDeskWallPaper( LPCSTR filename )
 262 {
 263     HBITMAP hbitmap;
 264     HDC hdc;
 265     char buffer[256];
 266     WND *wndPtr = WIN_GetDesktop();
 267     DESKTOP *desktopPtr = (DESKTOP *)wndPtr->wExtra;
 268
 269     if (filename == (LPSTR)-1)
 270     {
 271         GetProfileStringA( "desktop", "WallPaper", "(None)", buffer, 256 );
 272         filename = buffer;
 273     }
 274     hdc = GetDC( 0 );
 275     hbitmap = DESKTOP_LoadBitmap( hdc, filename );
 276     ReleaseDC( 0, hdc );
 277     if (desktopPtr->hbitmapWallPaper) DeleteObject( desktopPtr->hbitmapWallPaper );
 278     desktopPtr->hbitmapWallPaper = hbitmap;
 279     desktopPtr->fTileWallPaper = GetProfileIntA( "desktop", "TileWallPaper", 0 );
 280     if (hbitmap)
 281     {
 282         BITMAP bmp;
 283         GetObjectA( hbitmap, sizeof(bmp), &bmp );
 284         desktopPtr->bitmapSize.cx = (bmp.bmWidth != 0) ? bmp.bmWidth : 1;
 285         desktopPtr->bitmapSize.cy = (bmp.bmHeight != 0) ? bmp.bmHeight : 1;
 286     }
 287     WIN_ReleaseDesktop();
 288     return TRUE;
 289 }
 290
 291
 292 /***********************************************************************
 293  *           DESKTOP_SetPattern
 294  *
 295  * Set the desktop pattern.
 296  */
 297 BOOL DESKTOP_SetPattern( LPCSTR pattern )
 298 {
 299     WND *wndPtr = WIN_GetDesktop();
 300     DESKTOP *desktopPtr = (DESKTOP *)wndPtr->wExtra;
 301     int pat[8];
 302
 303     if (desktopPtr->hbrushPattern) DeleteObject( desktopPtr->hbrushPattern );
 304     memset( pat, 0, sizeof(pat) );
 305     if (pattern && sscanf( pattern, " %d %d %d %d %d %d %d %d",
 306                            &pat[0], &pat[1], &pat[2], &pat[3],
 307                            &pat[4], &pat[5], &pat[6], &pat[7] ))
 308     {
 309         WORD pattern[8];
 310         HBITMAP hbitmap;
 311         int i;
 312
 313         for (i = 0; i < 8; i++) pattern[i] = pat[i] & 0xffff;
 314         hbitmap = CreateBitmap( 8, 8, 1, 1, (LPSTR)pattern );
 315         desktopPtr->hbrushPattern = CreatePatternBrush( hbitmap );
 316         DeleteObject( hbitmap );
 317     }
 318     else desktopPtr->hbrushPattern = 0;
 319     WIN_ReleaseDesktop();
 320     return TRUE;
 321 }
 322