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