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