gdkdisplay-x11.c

linux下电话本所依赖的一些图形库

				      Window      xrootwin)
{
  gint n_screens, i;

  n_screens = gdk_display_get_n_screens (display);
  for (i = 0; i < n_screens; i++)
    {
      GdkScreen *screen = gdk_display_get_screen (display, i);
      if (GDK_SCREEN_XROOTWIN (screen) == xrootwin)
	return screen;
    }

  return NULL;
}

/**
 * gdk_x11_display_get_xdisplay:
 * @display: a #GdkDisplay
 * @returns: an X display.
 *
 * Returns the X display of a #GdkDisplay.
 *
 * Since: 2.2
 */
Display *
gdk_x11_display_get_xdisplay (GdkDisplay  *display)
{
  return GDK_DISPLAY_X11 (display)->xdisplay;
}

void
_gdk_windowing_set_default_display (GdkDisplay *display)
{
  GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
  const gchar *startup_id;
  
  if (display)
    gdk_display = GDK_DISPLAY_XDISPLAY (display);
  else
    gdk_display = NULL;

  g_free (display_x11->startup_notification_id);
  display_x11->startup_notification_id = NULL;
  
  startup_id = g_getenv ("DESKTOP_STARTUP_ID");
  if (startup_id && *startup_id != '\0')
    {
      gchar *time_str;

      if (!g_utf8_validate (startup_id, -1, NULL))
	g_warning ("DESKTOP_STARTUP_ID contains invalid UTF-8");
      else
	display_x11->startup_notification_id = g_strdup (startup_id);

      /* Find the launch time from the startup_id, if it's there.  Newer spec
       * states that the startup_id is of the form <unique>_TIME<timestamp>
       */
      time_str = g_strrstr (startup_id, "_TIME");
      if (time_str != NULL)
        {
	  gulong retval;
          gchar *end;
          errno = 0;

          /* Skip past the "_TIME" part */
          time_str += 5;

          retval = strtoul (time_str, &end, 0);
          if (end != time_str && errno == 0)
            display_x11->user_time = retval;
        }
      
      /* Clear the environment variable so it won't be inherited by
       * child processes and confuse things.  
       */
      g_unsetenv ("DESKTOP_STARTUP_ID");

      /* Set the startup id on the leader window so it
       * applies to all windows we create on this display
       */
      XChangeProperty (display_x11->xdisplay,
		       display_x11->leader_window,
		       gdk_x11_get_xatom_by_name_for_display (display, "_NET_STARTUP_ID"),
		       gdk_x11_get_xatom_by_name_for_display (display, "UTF8_STRING"), 8,
		       PropModeReplace,
		       startup_id, strlen (startup_id));
    }
}

static char*
escape_for_xmessage (const char *str)
{
  GString *retval;
  const char *p;
  
  retval = g_string_new (NULL);

  p = str;
  while (*p)
    {
      switch (*p)
        {
        case ' ':
        case '"':
        case '\\':
          g_string_append_c (retval, '\\');
          break;
        }

      g_string_append_c (retval, *p);
      ++p;
    }

  return g_string_free (retval, FALSE);
}

static void
broadcast_xmessage   (GdkDisplay   *display,
                      const char   *message_type,
                      const char   *message_type_begin,
                      const char   *message)
{
  Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);
  GdkScreen *screen = gdk_display_get_default_screen (display);
  GdkWindow *root_window = gdk_screen_get_root_window (screen);
  Window xroot_window = GDK_WINDOW_XID (root_window);
  
  Atom type_atom;
  Atom type_atom_begin;
  Window xwindow;

  {
    XSetWindowAttributes attrs;

    attrs.override_redirect = True;
    attrs.event_mask = PropertyChangeMask | StructureNotifyMask;

    xwindow =
      XCreateWindow (xdisplay,
                     xroot_window,
                     -100, -100, 1, 1,
                     0,
                     CopyFromParent,
                     CopyFromParent,
                     (Visual *)CopyFromParent,
                     CWOverrideRedirect | CWEventMask,
                     &attrs);
  }

  type_atom = gdk_x11_get_xatom_by_name_for_display (display,
                                                     message_type);
  type_atom_begin = gdk_x11_get_xatom_by_name_for_display (display,
                                                           message_type_begin);
  
  {
    XEvent xevent;
    const char *src;
    const char *src_end;
    char *dest;
    char *dest_end;
    
    xevent.xclient.type = ClientMessage;
    xevent.xclient.message_type = type_atom_begin;
    xevent.xclient.display =xdisplay;
    xevent.xclient.window = xwindow;
    xevent.xclient.format = 8;

    src = message;
    src_end = message + strlen (message) + 1; /* +1 to include nul byte */
    
    while (src != src_end)
      {
        dest = &xevent.xclient.data.b[0];
        dest_end = dest + 20;        
        
        while (dest != dest_end &&
               src != src_end)
          {
            *dest = *src;
            ++dest;
            ++src;
          }

	while (dest != dest_end)
	  {
	    *dest = 0;
	    ++dest;
	  }
        
        XSendEvent (xdisplay,
                    xroot_window,
                    False,
                    PropertyChangeMask,
                    &xevent);

        xevent.xclient.message_type = type_atom;
      }
  }

  XDestroyWindow (xdisplay, xwindow);
  XFlush (xdisplay);
}

/**
 * gdk_notify_startup_complete:
 * 
 * Indicates to the GUI environment that the application has finished
 * loading. If the applications opens windows, this function is
 * normally called after opening the application's initial set of
 * windows.
 * 
 * GTK+ will call this function automatically after opening the first
 * #GtkWindow unless gtk_window_set_auto_startup_notification() is called 
 * to disable that feature.
 *
 * Since: 2.2
 **/
void
gdk_notify_startup_complete (void)
{
  GdkDisplay *display;
  GdkDisplayX11 *display_x11;
  gchar *escaped_id;
  gchar *message;

  display = gdk_display_get_default ();
  if (!display)
    return;
  
  display_x11 = GDK_DISPLAY_X11 (display);

  if (display_x11->startup_notification_id == NULL)
    return;

  escaped_id = escape_for_xmessage (display_x11->startup_notification_id);
  message = g_strdup_printf ("remove: ID=%s", escaped_id);
  g_free (escaped_id);

  broadcast_xmessage (display,
		      "_NET_STARTUP_INFO",
                      "_NET_STARTUP_INFO_BEGIN",
                      message);

  g_free (message);
}


/**
 * gdk_display_supports_selection_notification:
 * @display: a #GdkDisplay
 * 
 * Returns whether #GdkEventOwnerChange events will be 
 * sent when the owner of a selection changes.
 * 
 * Return value: whether #GdkEventOwnerChange events will 
 *               be sent.
 *
 * Since: 2.6
 **/
gboolean 
gdk_display_supports_selection_notification (GdkDisplay *display)
{
  GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);

  return display_x11->have_xfixes;
}

/**
 * gdk_display_request_selection_notification:
 * @display: a #GdkDisplay
 * @selection: the #GdkAtom naming the selection for which
 *             ownership change notification is requested
 * 
 * Request #GdkEventOwnerChange events for ownership changes
 * of the selection named by the given atom.
 * 
 * Return value: whether #GdkEventOwnerChange events will 
 *               be sent.
 *
 * Since: 2.6
 **/
gboolean gdk_display_request_selection_notification  (GdkDisplay *display,
						      GdkAtom     selection)

{
#ifdef HAVE_XFIXES
  GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
  Atom atom;

  if (display_x11->have_xfixes)
    {
      atom = gdk_x11_atom_to_xatom_for_display (display, 
						selection);
      XFixesSelectSelectionInput (display_x11->xdisplay, 
				  display_x11->leader_window,
				  atom,
				  XFixesSetSelectionOwnerNotifyMask |
				  XFixesSelectionWindowDestroyNotifyMask |
				  XFixesSelectionClientCloseNotifyMask);
      return TRUE;
    }
  else
#endif
    return FALSE;
}

/**
 * gdk_display_supports_clipboard_persistence
 * @display: a #GdkDisplay
 *
 * Returns whether the speicifed display supports clipboard
 * persistance; i.e. if it's possible to store the clipboard data after an
 * application has quit. On X11 this checks if a clipboard daemon is
 * running.
 *
 * Returns: %TRUE if the display supports clipboard persistance.
 *
 * Since: 2.6
 */
gboolean
gdk_display_supports_clipboard_persistence (GdkDisplay *display)
{
  /* It might make sense to cache this */
  return XGetSelectionOwner (GDK_DISPLAY_X11 (display)->xdisplay,
			     gdk_x11_get_xatom_by_name_for_display (display, "CLIPBOARD_MANAGER")) != None;
}

/**
 * gdk_display_store_clipboard
 * @display:          a #GdkDisplay
 * @clipboard_window: a #GdkWindow belonging to the clipboard owner
 * @time_:            a timestamp
 * @targets:	      an array of targets that should be saved, or %NULL 
 *                    if all available targets should be saved.
 * @n_targets:        length of the @targets array
 *
 * Issues a request to the clipboard manager to store the
 * clipboard data. On X11, this is a special program that works
 * according to the freedesktop clipboard specification, available at
 * <ulink url="http://www.freedesktop.org/Standards/clipboard-manager-spec">
 * http://www.freedesktop.org/Standards/clipboard-manager-spec</ulink>.
 *
 * Since: 2.6
 */
void
gdk_display_store_clipboard (GdkDisplay *display,
			     GdkWindow  *clipboard_window,
			     guint32     time_,
			     GdkAtom    *targets,
			     gint        n_targets)
{
  GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (display);
  Atom clipboard_manager, save_targets;
  
  clipboard_manager = gdk_x11_get_xatom_by_name_for_display (display, "CLIPBOARD_MANAGER");
  save_targets = gdk_x11_get_xatom_by_name_for_display (display, "SAVE_TARGETS");

  gdk_error_trap_push ();

  if (XGetSelectionOwner (display_x11->xdisplay, clipboard_manager) != None)
    {
      Atom property_name = None;
      Atom *xatoms;
      int i;
      
      if (n_targets > 0)
	{
	  property_name = gdk_x11_atom_to_xatom_for_display (display, _gdk_selection_property);

	  xatoms = g_new (Atom, n_targets);
	  for (i = 0; i < n_targets; i++)
	    xatoms[i] = gdk_x11_atom_to_xatom_for_display (display, targets[i]);

	  XChangeProperty (display_x11->xdisplay, GDK_WINDOW_XID (clipboard_window),
			   property_name, XA_ATOM,
			   32, PropModeReplace, (guchar *)xatoms, n_targets);
	  g_free (xatoms);

	}
      
      XConvertSelection (display_x11->xdisplay,
			 clipboard_manager, save_targets, property_name,
			 GDK_WINDOW_XID (clipboard_window), time_);
      
    }
  gdk_error_trap_pop ();

}

guint32
gdk_x11_display_get_user_time_libgtk_only (GdkDisplay *display)
{
  return GDK_DISPLAY_X11 (display)->user_time;
}

#define __GDK_DISPLAY_X11_C__
#include "gdkaliasdef.c"