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