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 <windows.h>
  23 #include <wine/debug.h>
  24 #include "explorer_private.h"
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(explorer);
  27
  28 #define DESKTOP_CLASS_ATOM MAKEINTATOMW(32769)
  29 #define DESKTOP_ALL_ACCESS 0x01ff
  30
  31 static BOOL using_root;
  32
  33 /* window procedure for the desktop window */
  34 static LRESULT WINAPI desktop_wnd_proc( HWND hwnd, UINT message, WPARAM wp, LPARAM lp )
  35 {
  36     WINE_TRACE( "got msg %x wp %x lp %lx\n", message, wp, lp );
  37
  38     switch(message)
  39     {
  40     case WM_SYSCOMMAND:
  41         if ((wp & 0xfff0) == SC_CLOSE) ExitWindows( 0, 0 );
  42         return 0;
  43
  44     case WM_CLOSE:
  45         PostQuitMessage(0);
  46         return 0;
  47
  48     case WM_SETCURSOR:
  49         return (LRESULT)SetCursor( LoadCursorA( 0, (LPSTR)IDC_ARROW ) );
  50
  51     case WM_NCHITTEST:
  52         return HTCLIENT;
  53
  54     case WM_ERASEBKGND:
  55         if (!using_root) PaintDesktop( (HDC)wp );
  56         return TRUE;
  57
  58     case WM_PAINT:
  59         {
  60             PAINTSTRUCT ps;
  61             BeginPaint( hwnd, &ps );
  62             if (!using_root && ps.fErase) PaintDesktop( ps.hdc );
  63             EndPaint( hwnd, &ps );
  64         }
  65         return 0;
  66
  67     /* simple check to prevent applications accidentally triggering the
  68      * ExitWindowsEx code if they send random messages to the desktop window */
  69     case WM_USER + 666:
  70         if (HIWORD(wp) == 0xbabe)
  71             return ExitWindowsEx( LOWORD(wp), lp );
  72         return DefWindowProcW( hwnd, message, wp, lp );
  73
  74     default:
  75         return DefWindowProcW( hwnd, message, wp, lp );
  76     }
  77 }
  78
  79 /* create the desktop and the associated X11 window, and make it the current desktop */
  80 static unsigned long create_desktop( const char *name, unsigned int width, unsigned int height )
  81 {
  82     HMODULE x11drv = GetModuleHandleA( "winex11.drv" );
  83     HDESK desktop;
  84     unsigned long xwin = 0;
  85     unsigned long (*create_desktop_func)(unsigned int, unsigned int);
  86
  87     desktop = CreateDesktopA( name, NULL, NULL, 0, DESKTOP_ALL_ACCESS, NULL );
  88     if (!desktop)
  89     {
  90         WINE_ERR( "failed to create desktop %s error %ld\n", wine_dbgstr_a(name), GetLastError() );
  91         ExitProcess( 1 );
  92     }
  93     /* magic: desktop "root" means use the X11 root window */
  94     if (x11drv && strcasecmp( name, "root" ))
  95     {
  96         create_desktop_func = (void *)GetProcAddress( x11drv, "wine_create_desktop" );
  97         if (create_desktop_func) xwin = create_desktop_func( width, height );
  98     }
  99     SetThreadDesktop( desktop );
 100     return xwin;
 101 }
 102
 103 /* retrieve the default desktop size from the X11 driver config */
 104 /* FIXME: this is for backwards compatibility, should probably be changed */
 105 static BOOL get_default_desktop_size( unsigned int *width, unsigned int *height )
 106 {
 107     HKEY hkey;
 108     char buffer[64];
 109     DWORD size = sizeof(buffer);
 110     BOOL ret = FALSE;
 111
 112     /* @@ Wine registry key: HKCU\Software\Wine\X11 Driver */
 113     if (RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\X11 Driver", &hkey )) return FALSE;
 114     if (!RegQueryValueExA( hkey, "Desktop", 0, NULL, (LPBYTE)buffer, &size ))
 115         ret = (sscanf( buffer, "%ux%u", width, height ) == 2);
 116     RegCloseKey( hkey );
 117     return ret;
 118 }
 119
 120 /* main desktop management function */
 121 void manage_desktop( char *arg )
 122 {
 123     MSG msg;
 124     HWND hwnd;
 125     unsigned long xwin = 0;
 126     unsigned int width, height;
 127     char *cmdline = NULL;
 128     char *p = arg;
 129     static const WCHAR desktop_nameW[] = {'W','i','n','e',' ','d','e','s','k','t','o','p',0};
 130
 131     /* get the rest of the command line (if any) */
 132     while (*p && !isspace(*p)) p++;
 133     if (*p)
 134     {
 135         *p++ = 0;
 136         while (*p && isspace(*p)) p++;
 137         if (*p) cmdline = p;
 138     }
 139
 140     /* parse the desktop option */
 141     /* the option is of the form /desktop=name[,widthxheight] */
 142     if (*arg == '=' || *arg == ',')
 143     {
 144         arg++;
 145         if ((p = strchr( arg, ',' ))) *p++ = 0;
 146         if (!p || sscanf( p, "%ux%u", &width, &height ) != 2)
 147         {
 148             width = 800;
 149             height = 600;
 150         }
 151         xwin = create_desktop( arg, width, height );
 152     }
 153     else if (get_default_desktop_size( &width, &height ))
 154     {
 155         xwin = create_desktop( "Default", width, height );
 156     }
 157
 158     if (!xwin)  /* using the root window */
 159     {
 160         using_root = TRUE;
 161         width = GetSystemMetrics(SM_CXSCREEN);
 162         height = GetSystemMetrics(SM_CYSCREEN);
 163     }
 164
 165     /* create the desktop window */
 166     hwnd = CreateWindowExW( 0, DESKTOP_CLASS_ATOM, NULL,
 167                             WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
 168                             0, 0, width, height, 0, 0, 0, NULL );
 169     if (hwnd == GetDesktopWindow())
 170     {
 171         SetWindowLongPtrW( hwnd, GWLP_WNDPROC, (LONG_PTR)desktop_wnd_proc );
 172         SendMessageW( hwnd, WM_SETICON, ICON_BIG, (LPARAM)LoadIconW( 0, MAKEINTRESOURCEW(OIC_WINLOGO)));
 173         SetWindowTextW( hwnd, desktop_nameW );
 174         SystemParametersInfoA( SPI_SETDESKPATTERN, -1, NULL, FALSE );
 175         SetDeskWallPaper( (LPSTR)-1 );
 176         initialize_hal();
 177         initialize_systray();
 178     }
 179     else
 180     {
 181         DestroyWindow( hwnd );  /* someone beat us to it */
 182         hwnd = 0;
 183     }
 184
 185     /* if we have a command line, execute it */
 186     if (cmdline)
 187     {
 188         STARTUPINFOA si;
 189         PROCESS_INFORMATION pi;
 190
 191         memset( &si, 0, sizeof(si) );
 192         si.cb = sizeof(si);
 193         WINE_TRACE( "starting %s\n", wine_dbgstr_a(cmdline) );
 194         if (CreateProcessA( NULL, cmdline, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi ))
 195         {
 196             CloseHandle( pi.hThread );
 197             CloseHandle( pi.hProcess );
 198         }
 199     }
 200
 201     /* run the desktop message loop */
 202     if (hwnd)
 203     {
 204         WINE_TRACE( "desktop message loop starting on hwnd %p\n", hwnd );
 205         while (GetMessageW( &msg, 0, 0, 0 )) DispatchMessageW( &msg );
 206         WINE_TRACE( "desktop message loop exiting for hwnd %p\n", hwnd );
 207     }
 208
 209     ExitProcess( 0 );
 210 }