programs/explorer/desktop.c

   1 /*
   2  * Explorer desktop support
   3  *
   4  * Copyright 2006 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23 #include <stdio.h>
  24 #include "wine/unicode.h"
  25
  26 #define OEMRESOURCE
  27
  28 #include <windows.h>
  29 #include <wine/debug.h>
  30 #include "explorer_private.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(explorer);
  33
  34 #define DESKTOP_CLASS_ATOM ((LPCWSTR)MAKEINTATOM(32769))
  35 #define DESKTOP_ALL_ACCESS 0x01ff
  36
  37 static BOOL using_root;
  38
  39 /* screen saver handler */
  40 static BOOL start_screensaver( void )
  41 {
  42     if (using_root)
  43     {
  44         const char *argv[3] = { "xdg-screensaver", "activate", NULL };
  45         int pid = spawnvp( _P_NOWAIT, argv[0], argv );
  46         if (pid > 0)
  47         {
  48             WINE_TRACE( "started process %d\n", pid );
  49             return TRUE;
  50         }
  51     }
  52     return FALSE;
  53 }
  54
  55 /* window procedure for the desktop window */
  56 static LRESULT WINAPI desktop_wnd_proc( HWND hwnd, UINT message, WPARAM wp, LPARAM lp )
  57 {
  58     WINE_TRACE( "got msg %04x wp %lx lp %lx\n", message, wp, lp );
  59
  60     switch(message)
  61     {
  62     case WM_SYSCOMMAND:
  63         switch(wp & 0xfff0)
  64         {
  65         case SC_CLOSE:
  66             ExitWindows( 0, 0 );
  67             break;
  68         case SC_SCREENSAVE:
  69             return start_screensaver();
  70         }
  71         return 0;
  72
  73     case WM_CLOSE:
  74         PostQuitMessage(0);
  75         return 0;
  76
  77     case WM_SETCURSOR:
  78         return (LRESULT)SetCursor( LoadCursorA( 0, (LPSTR)IDC_ARROW ) );
  79
  80     case WM_NCHITTEST:
  81         return HTCLIENT;
  82
  83     case WM_ERASEBKGND:
  84         if (!using_root) PaintDesktop( (HDC)wp );
  85         return TRUE;
  86
  87     case WM_PAINT:
  88         {
  89             PAINTSTRUCT ps;
  90             BeginPaint( hwnd, &ps );
  91             if (!using_root && ps.fErase) PaintDesktop( ps.hdc );
  92             EndPaint( hwnd, &ps );
  93         }
  94         return 0;
  95
  96     default:
  97         return DefWindowProcW( hwnd, message, wp, lp );
  98     }
  99 }
 100
 101 /* create the desktop and the associated X11 window, and make it the current desktop */
 102 static unsigned long create_desktop( const WCHAR *name, unsigned int width, unsigned int height )
 103 {
 104     static const WCHAR rootW[] = {'r','o','o','t',0};
 105     HMODULE x11drv = GetModuleHandleA( "winex11.drv" );
 106     HDESK desktop;
 107     unsigned long xwin = 0;
 108     unsigned long (CDECL *create_desktop_func)(unsigned int, unsigned int);
 109
 110     desktop = CreateDesktopW( name, NULL, NULL, 0, DESKTOP_ALL_ACCESS, NULL );
 111     if (!desktop)
 112     {
 113         WINE_ERR( "failed to create desktop %s error %d\n", wine_dbgstr_w(name), GetLastError() );
 114         ExitProcess( 1 );
 115     }
 116     /* magic: desktop "root" means use the X11 root window */
 117     if (x11drv && strcmpiW( name, rootW ))
 118     {
 119         create_desktop_func = (void *)GetProcAddress( x11drv, "wine_create_desktop" );
 120         if (create_desktop_func) xwin = create_desktop_func( width, height );
 121     }
 122     SetThreadDesktop( desktop );
 123     return xwin;
 124 }
 125
 126 /* parse the desktop size specification */
 127 static BOOL parse_size( const WCHAR *size, unsigned int *width, unsigned int *height )
 128 {
 129     WCHAR *end;
 130
 131     *width = strtoulW( size, &end, 10 );
 132     if (end == size) return FALSE;
 133     if (*end != 'x') return FALSE;
 134     size = end + 1;
 135     *height = strtoulW( size, &end, 10 );
 136     return !*end;
 137 }
 138
 139 /* retrieve the desktop name to use if not specified on the command line */
 140 static const WCHAR *get_default_desktop_name(void)
 141 {
 142     static const WCHAR desktopW[] = {'D','e','s','k','t','o','p',0};
 143     static const WCHAR defaultW[] = {'D','e','f','a','u','l','t',0};
 144     static const WCHAR explorer_keyW[] = {'S','o','f','t','w','a','r','e','\\','W','i','n','e','\\',
 145                                           'E','x','p','l','o','r','e','r',0};
 146     static WCHAR buffer[MAX_PATH];
 147     DWORD size = sizeof(buffer);
 148     HDESK desk = GetThreadDesktop( GetCurrentThreadId() );
 149     WCHAR *ret = NULL;
 150     HKEY hkey;
 151
 152     if (desk && GetUserObjectInformationW( desk, UOI_NAME, buffer, sizeof(buffer)/sizeof(WCHAR), NULL ))
 153     {
 154         if (strcmpiW( buffer, defaultW )) return buffer;
 155     }
 156
 157     /* @@ Wine registry key: HKCU\Software\Wine\Explorer */
 158     if (!RegOpenKeyW( HKEY_CURRENT_USER, explorer_keyW, &hkey ))
 159     {
 160         if (!RegQueryValueExW( hkey, desktopW, 0, NULL, (LPBYTE)buffer, &size )) ret = buffer;
 161         RegCloseKey( hkey );
 162     }
 163     return ret;
 164 }
 165
 166 /* retrieve the default desktop size from the registry */
 167 static BOOL get_default_desktop_size( const WCHAR *name, unsigned int *width, unsigned int *height )
 168 {
 169     static const WCHAR desktop_keyW[] = {'S','o','f','t','w','a','r','e','\\','W','i','n','e','\\',
 170                                          'E','x','p','l','o','r','e','r','\\',
 171                                          'D','e','s','k','t','o','p','s',0};
 172     HKEY hkey;
 173     WCHAR buffer[64];
 174     DWORD size = sizeof(buffer);
 175     BOOL found = FALSE;
 176
 177     *width = 800;
 178     *height = 600;
 179
 180     /* @@ Wine registry key: HKCU\Software\Wine\Explorer\Desktops */
 181     if (!RegOpenKeyW( HKEY_CURRENT_USER, desktop_keyW, &hkey ))
 182     {
 183         if (!RegQueryValueExW( hkey, name, 0, NULL, (LPBYTE)buffer, &size ))
 184         {
 185             found = TRUE;
 186             if (!parse_size( buffer, width, height )) *width = *height = 0;
 187         }
 188         RegCloseKey( hkey );
 189     }
 190     return found;
 191 }
 192
 193 static void initialize_display_settings( HWND desktop )
 194 {
 195     static const WCHAR display_device_guid_propW[] = {
 196         '_','_','w','i','n','e','_','d','i','s','p','l','a','y','_',
 197         'd','e','v','i','c','e','_','g','u','i','d',0 };
 198     GUID guid;
 199     RPC_CSTR guid_str;
 200     ATOM guid_atom;
 201     DEVMODEW dmW;
 202
 203     UuidCreate( &guid );
 204     UuidToStringA( &guid, &guid_str );
 205     WINE_TRACE( "display guid %s\n", guid_str );
 206
 207     guid_atom = GlobalAddAtomA( (LPCSTR)guid_str );
 208     SetPropW( desktop, display_device_guid_propW, ULongToHandle(guid_atom) );
 209
 210     RpcStringFreeA( &guid_str );
 211
 212     /* Store current display mode in the registry */
 213     if (EnumDisplaySettingsExW( NULL, ENUM_CURRENT_SETTINGS, &dmW, 0 ))
 214     {
 215         WINE_TRACE( "Current display mode %ux%u %u bpp %u Hz\n", dmW.dmPelsWidth,
 216                     dmW.dmPelsHeight, dmW.dmBitsPerPel, dmW.dmDisplayFrequency );
 217         ChangeDisplaySettingsExW( NULL, &dmW, 0,
 218                                   CDS_GLOBAL | CDS_NORESET | CDS_UPDATEREGISTRY,
 219                                   NULL );
 220     }
 221 }
 222
 223 static void set_desktop_window_title( HWND hwnd, const WCHAR *name )
 224 {
 225     static const WCHAR desktop_nameW[] = {'W','i','n','e',' ','d','e','s','k','t','o','p',0};
 226     static const WCHAR desktop_name_separatorW[] = {' ', '-', ' ', 0};
 227     WCHAR *window_titleW = NULL;
 228     int window_title_len;
 229
 230     if (!name[0])
 231     {
 232         SetWindowTextW( hwnd, desktop_nameW );
 233         return;
 234     }
 235
 236     window_title_len = strlenW(name) * sizeof(WCHAR)
 237                      + sizeof(desktop_name_separatorW)
 238                      + sizeof(desktop_nameW);
 239     window_titleW = HeapAlloc( GetProcessHeap(), 0, window_title_len );
 240     if (!window_titleW)
 241     {
 242         SetWindowTextW( hwnd, desktop_nameW );
 243         return;
 244     }
 245
 246     strcpyW( window_titleW, name );
 247     strcatW( window_titleW, desktop_name_separatorW );
 248     strcatW( window_titleW, desktop_nameW );
 249
 250     SetWindowTextW( hwnd, window_titleW );
 251     HeapFree( GetProcessHeap(), 0, window_titleW );
 252 }
 253
 254 /* main desktop management function */
 255 void manage_desktop( WCHAR *arg )
 256 {
 257     static const WCHAR defaultW[] = {'D','e','f','a','u','l','t',0};
 258     static const WCHAR messageW[] = {'M','e','s','s','a','g','e',0};
 259     MSG msg;
 260     HWND hwnd, msg_hwnd;
 261     unsigned long xwin = 0;
 262     unsigned int width, height;
 263     WCHAR *cmdline = NULL;
 264     WCHAR *p = arg;
 265     const WCHAR *name = NULL;
 266
 267     /* get the rest of the command line (if any) */
 268     while (*p && !isspace(*p)) p++;
 269     if (*p)
 270     {
 271         *p++ = 0;
 272         while (*p && isspace(*p)) p++;
 273         if (*p) cmdline = p;
 274     }
 275
 276     /* parse the desktop option */
 277     /* the option is of the form /desktop=name[,widthxheight] */
 278     if (*arg == '=' || *arg == ',')
 279     {
 280         arg++;
 281         name = arg;
 282         if ((p = strchrW( arg, ',' ))) *p++ = 0;
 283         if (!p || !parse_size( p, &width, &height ))
 284             get_default_desktop_size( name, &width, &height );
 285     }
 286     else if ((name = get_default_desktop_name()))
 287     {
 288         if (!get_default_desktop_size( name, &width, &height )) width = height = 0;
 289     }
 290     else  /* check for the X11 driver key for backwards compatibility (to be removed) */
 291     {
 292         static const WCHAR desktopW[] = {'D','e','s','k','t','o','p',0};
 293         static const WCHAR x11_keyW[] = {'S','o','f','t','w','a','r','e','\\','W','i','n','e','\\',
 294                                          'X','1','1',' ','D','r','i','v','e','r',0};
 295         HKEY hkey;
 296         WCHAR buffer[64];
 297         DWORD size = sizeof(buffer);
 298
 299         width = height = 0;
 300         /* @@ Wine registry key: HKCU\Software\Wine\X11 Driver */
 301         if (!RegOpenKeyW( HKEY_CURRENT_USER, x11_keyW, &hkey ))
 302         {
 303             if (!RegQueryValueExW( hkey, desktopW, 0, NULL, (LPBYTE)buffer, &size ))
 304             {
 305                 name = defaultW;
 306                 if (!parse_size( buffer, &width, &height )) width = height = 0;
 307             }
 308             RegCloseKey( hkey );
 309         }
 310     }
 311
 312     if (name && width && height) xwin = create_desktop( name, width, height );
 313
 314     if (!xwin) using_root = TRUE; /* using the root window */
 315
 316     /* create the desktop window */
 317     hwnd = CreateWindowExW( 0, DESKTOP_CLASS_ATOM, NULL,
 318                             WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
 319                             GetSystemMetrics(SM_XVIRTUALSCREEN), GetSystemMetrics(SM_YVIRTUALSCREEN),
 320                             GetSystemMetrics(SM_CXVIRTUALSCREEN), GetSystemMetrics(SM_CYVIRTUALSCREEN),
 321                             0, 0, 0, NULL );
 322
 323     /* create the HWND_MESSAGE parent */
 324     msg_hwnd = CreateWindowExW( 0, messageW, NULL, WS_POPUP | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
 325                                 0, 0, 100, 100, 0, 0, 0, NULL );
 326
 327     if (hwnd == GetDesktopWindow())
 328     {
 329         HMODULE shell32;
 330         void (WINAPI *pShellDDEInit)( BOOL );
 331
 332         SetWindowLongPtrW( hwnd, GWLP_WNDPROC, (LONG_PTR)desktop_wnd_proc );
 333         SendMessageW( hwnd, WM_SETICON, ICON_BIG, (LPARAM)LoadIconW( 0, MAKEINTRESOURCEW(OIC_WINLOGO)));
 334         if (name) set_desktop_window_title( hwnd, name );
 335         SystemParametersInfoA( SPI_SETDESKPATTERN, -1, NULL, FALSE );
 336         SetDeskWallPaper( (LPSTR)-1 );
 337         initialize_display_settings( hwnd );
 338         initialize_appbar();
 339         initialize_systray();
 340
 341         if ((shell32 = LoadLibraryA( "shell32.dll" )) &&
 342             (pShellDDEInit = (void *)GetProcAddress( shell32, (LPCSTR)188)))
 343         {
 344             pShellDDEInit( TRUE );
 345         }
 346     }
 347     else
 348     {
 349         DestroyWindow( hwnd );  /* someone beat us to it */
 350         hwnd = 0;
 351     }
 352
 353     if (GetAncestor( msg_hwnd, GA_PARENT )) DestroyWindow( msg_hwnd );  /* someone beat us to it */
 354
 355     /* if we have a command line, execute it */
 356     if (cmdline)
 357     {
 358         STARTUPINFOW si;
 359         PROCESS_INFORMATION pi;
 360
 361         memset( &si, 0, sizeof(si) );
 362         si.cb = sizeof(si);
 363         WINE_TRACE( "starting %s\n", wine_dbgstr_w(cmdline) );
 364         if (CreateProcessW( NULL, cmdline, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi ))
 365         {
 366             CloseHandle( pi.hThread );
 367             CloseHandle( pi.hProcess );
 368         }
 369     }
 370
 371     /* run the desktop message loop */
 372     if (hwnd)
 373     {
 374         WINE_TRACE( "desktop message loop starting on hwnd %p\n", hwnd );
 375         while (GetMessageW( &msg, 0, 0, 0 )) DispatchMessageW( &msg );
 376         WINE_TRACE( "desktop message loop exiting for hwnd %p\n", hwnd );
 377     }
 378
 379     ExitProcess( 0 );
 380 }