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
  23 #define OEMRESOURCE
  24
  25 #include <windows.h>
  26 #include <wine/debug.h>
  27 #include "explorer_private.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(explorer);
  30
  31 #define DESKTOP_CLASS_ATOM ((LPCWSTR)MAKEINTATOM(32769))
  32 #define DESKTOP_ALL_ACCESS 0x01ff
  33
  34 extern HANDLE __wine_make_process_system(void);
  35
  36 static BOOL using_root;
  37
  38 /* window procedure for the desktop window */
  39 static LRESULT WINAPI desktop_wnd_proc( HWND hwnd, UINT message, WPARAM wp, LPARAM lp )
  40 {
  41     WINE_TRACE( "got msg %x wp %lx lp %lx\n", message, wp, lp );
  42
  43     switch(message)
  44     {
  45     case WM_SYSCOMMAND:
  46         if ((wp & 0xfff0) == SC_CLOSE) ExitWindows( 0, 0 );
  47         return 0;
  48
  49     case WM_CLOSE:
  50         PostQuitMessage(0);
  51         return 0;
  52
  53     case WM_SETCURSOR:
  54         return (LRESULT)SetCursor( LoadCursorA( 0, (LPSTR)IDC_ARROW ) );
  55
  56     case WM_NCHITTEST:
  57         return HTCLIENT;
  58
  59     case WM_ERASEBKGND:
  60         if (!using_root) PaintDesktop( (HDC)wp );
  61         return TRUE;
  62
  63     case WM_PAINT:
  64         {
  65             PAINTSTRUCT ps;
  66             BeginPaint( hwnd, &ps );
  67             if (!using_root && ps.fErase) PaintDesktop( ps.hdc );
  68             EndPaint( hwnd, &ps );
  69         }
  70         return 0;
  71
  72     default:
  73         return DefWindowProcW( hwnd, message, wp, lp );
  74     }
  75 }
  76
  77 /* create the desktop and the associated X11 window, and make it the current desktop */
  78 static unsigned long create_desktop( const char *name, unsigned int width, unsigned int height )
  79 {
  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 = CreateDesktopA( 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_a(name), GetLastError() );
  89         ExitProcess( 1 );
  90     }
  91     /* magic: desktop "root" means use the X11 root window */
  92     if (x11drv && strcasecmp( name, "root" ))
  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 /* retrieve the default desktop size from the X11 driver config */
 102 /* FIXME: this is for backwards compatibility, should probably be changed */
 103 static BOOL get_default_desktop_size( unsigned int *width, unsigned int *height )
 104 {
 105     HKEY hkey;
 106     char buffer[64];
 107     DWORD size = sizeof(buffer);
 108     BOOL ret = FALSE;
 109
 110     /* @@ Wine registry key: HKCU\Software\Wine\X11 Driver */
 111     if (RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\X11 Driver", &hkey )) return FALSE;
 112     if (!RegQueryValueExA( hkey, "Desktop", 0, NULL, (LPBYTE)buffer, &size ))
 113         ret = (sscanf( buffer, "%ux%u", width, height ) == 2);
 114     RegCloseKey( hkey );
 115     return ret;
 116 }
 117
 118 /* main desktop management function */
 119 void manage_desktop( char *arg )
 120 {
 121     MSG msg;
 122     HWND hwnd;
 123     unsigned long xwin = 0;
 124     unsigned int width, height;
 125     char *cmdline = NULL;
 126     char *p = arg;
 127     static const WCHAR desktop_nameW[] = {'W','i','n','e',' ','d','e','s','k','t','o','p',0};
 128
 129     /* get the rest of the command line (if any) */
 130     while (*p && !isspace(*p)) p++;
 131     if (*p)
 132     {
 133         *p++ = 0;
 134         while (*p && isspace(*p)) p++;
 135         if (*p) cmdline = p;
 136     }
 137
 138     /* parse the desktop option */
 139     /* the option is of the form /desktop=name[,widthxheight] */
 140     if (*arg == '=' || *arg == ',')
 141     {
 142         arg++;
 143         if ((p = strchr( arg, ',' ))) *p++ = 0;
 144         if (!p || sscanf( p, "%ux%u", &width, &height ) != 2)
 145         {
 146             width = 800;
 147             height = 600;
 148         }
 149         xwin = create_desktop( arg, width, height );
 150     }
 151     else if (get_default_desktop_size( &width, &height ))
 152     {
 153         xwin = create_desktop( "Default", width, height );
 154     }
 155
 156     if (!xwin)  /* using the root window */
 157     {
 158         using_root = TRUE;
 159         width = GetSystemMetrics(SM_CXSCREEN);
 160         height = GetSystemMetrics(SM_CYSCREEN);
 161     }
 162
 163     /* create the desktop window */
 164     hwnd = CreateWindowExW( 0, DESKTOP_CLASS_ATOM, NULL,
 165                             WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
 166                             0, 0, width, height, 0, 0, 0, NULL );
 167     if (hwnd == GetDesktopWindow())
 168     {
 169         SetWindowLongPtrW( hwnd, GWLP_WNDPROC, (LONG_PTR)desktop_wnd_proc );
 170         SendMessageW( hwnd, WM_SETICON, ICON_BIG, (LPARAM)LoadIconW( 0, MAKEINTRESOURCEW(OIC_WINLOGO)));
 171         SetWindowTextW( hwnd, desktop_nameW );
 172         SystemParametersInfoA( SPI_SETDESKPATTERN, -1, NULL, FALSE );
 173         SetDeskWallPaper( (LPSTR)-1 );
 174         initialize_diskarbitration();
 175         initialize_hal();
 176         initialize_systray();
 177     }
 178     else
 179     {
 180         DestroyWindow( hwnd );  /* someone beat us to it */
 181         hwnd = 0;
 182     }
 183
 184     /* if we have a command line, execute it */
 185     if (cmdline)
 186     {
 187         STARTUPINFOA si;
 188         PROCESS_INFORMATION pi;
 189
 190         memset( &si, 0, sizeof(si) );
 191         si.cb = sizeof(si);
 192         WINE_TRACE( "starting %s\n", wine_dbgstr_a(cmdline) );
 193         if (CreateProcessA( NULL, cmdline, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi ))
 194         {
 195             CloseHandle( pi.hThread );
 196             CloseHandle( pi.hProcess );
 197         }
 198     }
 199
 200     /* run the desktop message loop */
 201     if (hwnd)
 202     {
 203         /* we don't use the system process event, the server
 204          * posts a WM_CLOSE when the last desktop user is gone */
 205         CloseHandle( __wine_make_process_system() );
 206
 207         WINE_TRACE( "desktop message loop starting on hwnd %p\n", hwnd );
 208         while (GetMessageW( &msg, 0, 0, 0 )) DispatchMessageW( &msg );
 209         WINE_TRACE( "desktop message loop exiting for hwnd %p\n", hwnd );
 210     }
 211
 212     ExitProcess( 0 );
 213 }