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     default:
  68         return DefWindowProcW( hwnd, message, wp, lp );
  69     }
  70 }
  71
  72 /* create the desktop and the associated X11 window, and make it the current desktop */
  73 static unsigned long create_desktop( const char *name, unsigned int width, unsigned int height )
  74 {
  75     HMODULE x11drv = GetModuleHandleA( "winex11.drv" );
  76     HDESK desktop;
  77     unsigned long xwin = 0;
  78     unsigned long (*create_desktop_func)(unsigned int, unsigned int);
  79
  80     desktop = CreateDesktopA( name, NULL, NULL, 0, DESKTOP_ALL_ACCESS, NULL );
  81     if (!desktop)
  82     {
  83         WINE_ERR( "failed to create desktop %s error %ld\n", wine_dbgstr_a(name), GetLastError() );
  84         ExitProcess( 1 );
  85     }
  86     /* magic: desktop "root" means use the X11 root window */
  87     if (x11drv && strcasecmp( name, "root" ))
  88     {
  89         create_desktop_func = (void *)GetProcAddress( x11drv, "wine_create_desktop" );
  90         if (create_desktop_func) xwin = create_desktop_func( width, height );
  91     }
  92     SetThreadDesktop( desktop );
  93     return xwin;
  94 }
  95
  96 /* retrieve the default desktop size from the X11 driver config */
  97 /* FIXME: this is for backwards compatibility, should probably be changed */
  98 static BOOL get_default_desktop_size( unsigned int *width, unsigned int *height )
  99 {
 100     HKEY hkey;
 101     char buffer[64];
 102     DWORD size = sizeof(buffer);
 103     BOOL ret = FALSE;
 104
 105     /* @@ Wine registry key: HKCU\Software\Wine\X11 Driver */
 106     if (RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\X11 Driver", &hkey )) return FALSE;
 107     if (!RegQueryValueExA( hkey, "Desktop", 0, NULL, (LPBYTE)buffer, &size ))
 108         ret = (sscanf( buffer, "%ux%u", width, height ) == 2);
 109     RegCloseKey( hkey );
 110     return ret;
 111 }
 112
 113 /* main desktop management function */
 114 void manage_desktop( char *arg )
 115 {
 116     MSG msg;
 117     HWND hwnd;
 118     unsigned long xwin = 0;
 119     unsigned int width, height;
 120     char *cmdline = NULL;
 121     char *p = arg;
 122     static const WCHAR desktop_nameW[] = {'W','i','n','e',' ','d','e','s','k','t','o','p',0};
 123
 124     /* get the rest of the command line (if any) */
 125     while (*p && !isspace(*p)) p++;
 126     if (*p)
 127     {
 128         *p++ = 0;
 129         while (*p && isspace(*p)) p++;
 130         if (*p) cmdline = p;
 131     }
 132
 133     /* parse the desktop option */
 134     /* the option is of the form /desktop=name[,widthxheight] */
 135     if (*arg == '=' || *arg == ',')
 136     {
 137         arg++;
 138         if ((p = strchr( arg, ',' ))) *p++ = 0;
 139         if (!p || sscanf( p, "%ux%u", &width, &height ) != 2)
 140         {
 141             width = 800;
 142             height = 600;
 143         }
 144         xwin = create_desktop( arg, width, height );
 145     }
 146     else if (get_default_desktop_size( &width, &height ))
 147     {
 148         xwin = create_desktop( "Default", width, height );
 149     }
 150
 151     if (!xwin)  /* using the root window */
 152     {
 153         using_root = TRUE;
 154         width = GetSystemMetrics(SM_CXSCREEN);
 155         height = GetSystemMetrics(SM_CYSCREEN);
 156     }
 157
 158     /* create the desktop window */
 159     hwnd = CreateWindowExW( 0, DESKTOP_CLASS_ATOM, NULL,
 160                             WS_POPUP | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
 161                             0, 0, width, height, 0, 0, 0, NULL );
 162     if (hwnd == GetDesktopWindow())
 163     {
 164         SetWindowLongPtrW( hwnd, GWLP_WNDPROC, (LONG_PTR)desktop_wnd_proc );
 165         SendMessageW( hwnd, WM_SETICON, ICON_BIG, (LPARAM)LoadIconW( 0, MAKEINTRESOURCEW(OIC_WINLOGO)));
 166         SetWindowTextW( hwnd, desktop_nameW );
 167         SystemParametersInfoA( SPI_SETDESKPATTERN, -1, NULL, FALSE );
 168         SetDeskWallPaper( (LPSTR)-1 );
 169         initialize_hal();
 170         initialize_systray();
 171     }
 172     else
 173     {
 174         DestroyWindow( hwnd );  /* someone beat us to it */
 175         hwnd = 0;
 176     }
 177
 178     /* if we have a command line, execute it */
 179     if (cmdline)
 180     {
 181         STARTUPINFOA si;
 182         PROCESS_INFORMATION pi;
 183
 184         memset( &si, 0, sizeof(si) );
 185         si.cb = sizeof(si);
 186         WINE_TRACE( "starting %s\n", wine_dbgstr_a(cmdline) );
 187         if (CreateProcessA( NULL, cmdline, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi ))
 188         {
 189             CloseHandle( pi.hThread );
 190             CloseHandle( pi.hProcess );
 191         }
 192     }
 193
 194     /* run the desktop message loop */
 195     if (hwnd)
 196     {
 197         WINE_TRACE( "desktop message loop starting on hwnd %p\n", hwnd );
 198         while (GetMessageW( &msg, 0, 0, 0 )) DispatchMessageW( &msg );
 199         WINE_TRACE( "desktop message loop exiting for hwnd %p\n", hwnd );
 200     }
 201
 202     ExitProcess( 0 );
 203 }