gdkinputgxi.h

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	      ((GdkWindowPrivate *)window)->height);
#endif      
      gdk_input_gxi_set_core_pointer(gdkdev);
      return FALSE;
    }
  else
    return return_val;

}

static void
gdk_input_gxi_update_device (GdkDevicePrivate *gdkdev)
{
  GList *t;

  if (gdk_input_is_extension_device (gdkdev->info.deviceid))
    {
      if (!gdkdev->xdevice)
	{
	  gdkdev->xdevice = XOpenDevice(gdk_display, gdkdev->info.deviceid);
	  gdk_input_gxi_select_notify (gdkdev);
	  gdkdev->needs_update = 1;
	}
      if (gdkdev->needs_update && gdkdev->xdevice)
	{
	  for (t = gdk_input_windows; t; t = t->next)
	    gdk_input_common_select_events (((GdkInputWindow *)t->data)->window,
					 gdkdev);
	  gdkdev->needs_update = 0;
	}
    }
}

static gint 
gdk_input_gxi_window_none_event (GdkEvent *event, XEvent *xevent)
{
  GdkDevicePrivate *gdkdev = 
    gdk_input_find_device(((XDeviceButtonEvent *)xevent)->deviceid);

  if (!gdkdev) {
    return -1;			/* we don't handle it - not an XInput event */
  }

  if (xevent->type == gdkdev->changenotify_type)
    {
      if (gdk_input_core_pointer != gdkdev)
	{
#ifdef DEBUG_SWITCHING
	  g_print("ChangeNotify from %d to %d:\n",
		  gdk_input_core_pointer->info.deviceid,
		  gdkdev->info.deviceid);
#endif
	  gdk_input_gxi_update_device (gdk_input_core_pointer);
	  gdk_input_core_pointer = gdkdev;
	}
    }
		
  return FALSE;
}

static gint
gdk_input_gxi_enable_window (GdkWindow *window, GdkDevicePrivate *gdkdev)
{
  GdkInputWindow *input_window;

  input_window = gdk_input_window_find (window);
  g_return_val_if_fail (input_window != NULL, FALSE);

  if (!gdkdev->claimed)
    {
      if (gxid_claim_device(gdk_input_gxid_host, gdk_input_gxid_port,
			    gdkdev->info.deviceid,
			    GDK_WINDOW_XWINDOW(window), FALSE) !=
	  GXID_RETURN_OK)
	{
	  g_warning("Could not get device (is gxid running?)\n");
	  return FALSE;
	}
      gdkdev->claimed = TRUE;
    }

  if (gdkdev->xdevice && gdkdev != gdk_input_core_pointer)
    gdk_input_common_select_events(window, gdkdev);
  else
    gdkdev->needs_update = TRUE;
  
  return TRUE;
}

static gint
gdk_input_gxi_disable_window(GdkWindow *window, GdkDevicePrivate *gdkdev)
{
  GdkInputWindow *input_window;

  input_window = gdk_input_window_find (window);
  g_return_val_if_fail (input_window != NULL, FALSE);

  if (gdkdev->claimed)
    {
      gxid_release_device(gdk_input_gxid_host, gdk_input_gxid_port,
			  gdkdev->info.deviceid,
			  GDK_WINDOW_XWINDOW(window));

      gdkdev->claimed = FALSE;
    }

  if (gdkdev->xdevice && gdkdev != gdk_input_core_pointer)
    gdk_input_common_select_events(window, gdkdev);
  else
    gdkdev->needs_update = TRUE;
  
  return TRUE;
}

static gint
gdk_input_is_obscured(GdkInputWindow *input_window, gdouble x, gdouble y)
{
  int i;
  for (i=0;i<input_window->num_obscuring;i++)
    {
      GdkRectangle *rect = &input_window->obscuring[i];
      if ((x >= rect->x) &&
	  (y >= rect->y) &&
	  (x < rect->x + rect->width) &&
	  (y < rect->y + rect->height))
	return TRUE;
    }
  return FALSE;
}

/* If this routine needs fixing, the corresponding routine
   in gxid.c will need it too. */

static Window 
gdk_input_find_root_child(Display *dpy, Window w)
{
  Window root,parent;
  Window *children;
  int nchildren;

  parent = w;
  do 
    {
      w = parent;
      XQueryTree(dpy,w,&root,&parent,&children,&nchildren);
      if (children) XFree(children);
    } 
  while (parent != root);
  
  return w;
}

void
gdk_input_compute_obscuring(GdkInputWindow *input_window)
{
  int i;
  int x,y,width,height;
  int xc,yc,widthc,heightc,border_widthc,depthc;

  Window root,parent;
  Window *children;
  int nchildren;

  Window w = GDK_WINDOW_XWINDOW(input_window->window);
  Window root_child = gdk_input_find_root_child(gdk_display,w);
  gdk_input_get_root_relative_geometry(gdk_display,w,&x,&y,&width,&height);

  input_window->root_x = x;
  input_window->root_y = y;

  XQueryTree(gdk_display,GDK_ROOT_WINDOW(),
	     &root,&parent,&children,&nchildren);


  if (input_window->obscuring)
    g_free(input_window->obscuring);
  input_window->obscuring = 0;
  input_window->num_obscuring = 0;

  for (i=0;i<nchildren;i++)
    if (children[i] == root_child)
      break;

  if (i>=nchildren-1)
    {
      if (nchildren)
	XFree(children);
      return;
    }

  input_window->obscuring = g_new(GdkRectangle,(nchildren-i-1));

  for (i=i+1;i<nchildren;i++)
    {
      int xmin, xmax, ymin, ymax;
      XGetGeometry(gdk_display,children[i],&root,&xc,&yc,&widthc,&heightc,
		   &border_widthc, &depthc);
      xmin = xc>x ? xc : x;
      xmax = (xc+widthc)<(x+width) ? xc+widthc : x+width;
      ymin = yc>y ? yc : y;
      ymax = (yc+heightc)<(y+height) ? yc+heightc : y+height;
      if ((xmin < xmax) && (ymin < ymax))
	{
	  XWindowAttributes attributes;
	  XGetWindowAttributes(gdk_display,children[i],&attributes);
	  if (attributes.map_state == IsViewable)
	    {
	      GdkRectangle *rect = &input_window->obscuring[input_window->num_obscuring];
	      
	      /* we store the whole window, not just the obscuring part */
	      rect->x = xc - x;
	      rect->y = yc - y;
	      rect->width = widthc;
	      rect->height = heightc;
	      input_window->num_obscuring++;
	    }
	}
    }

  if (nchildren)
    XFree(children);
}

static void 
gdk_input_gxi_get_pointer     (GdkWindow       *window,
			       guint32	   deviceid,
			       gdouble         *x,
			       gdouble         *y,
			       gdouble         *pressure,
			       gdouble         *xtilt,
			       gdouble         *ytilt,
			       GdkModifierType *mask)
{
  GdkDevicePrivate *gdkdev;

  gdkdev = gdk_input_find_device (deviceid);
  g_return_if_fail (gdkdev != NULL);

  if (gdkdev == gdk_input_core_pointer)
    gdk_input_common_get_pointer (window, GDK_CORE_POINTER, x, y,
				  pressure, xtilt, ytilt, mask);
  else
    gdk_input_common_get_pointer (window, deviceid, x, y,
				  pressure, xtilt, ytilt, mask);
}

static GdkTimeCoord *
gdk_input_gxi_motion_events (GdkWindow *window,
			     guint32 deviceid,
			     guint32 start,
			     guint32 stop,
			     gint *nevents_return)
{
  GdkDevicePrivate *gdkdev;

  gdkdev = gdk_input_find_device (deviceid);
  g_return_val_if_fail (gdkdev != NULL, NULL);
  

  if (gdkdev == gdk_input_core_pointer)
    return gdk_input_motion_events (window, GDK_CORE_POINTER, start, stop,
				    nevents_return);
  else
    return gdk_input_common_motion_events (window, deviceid, start, stop,
					   nevents_return);
  
}

static gint 
gdk_input_gxi_grab_pointer (GdkWindow *     window,
			    gint            owner_events,
			    GdkEventMask    event_mask,
			    GdkWindow *     confine_to,
			    guint32         time)
{
  GList *tmp_list;
  GdkInputWindow *input_window;
  GdkDevicePrivate *gdkdev;

  tmp_list = gdk_input_windows;
  while (tmp_list)
    {
      input_window = (GdkInputWindow *)tmp_list->data;

      if (input_window->window == window)
	input_window->grabbed = TRUE;
      else if (input_window->grabbed)
	input_window->grabbed = FALSE;

      tmp_list = tmp_list->next;
    }

  tmp_list = gdk_input_devices;
  while (tmp_list)
    {
      gdkdev = (GdkDevicePrivate *)tmp_list->data;
      if (gdkdev->info.deviceid != GDK_CORE_POINTER && 
	  gdkdev->xdevice &&
	  (gdkdev->button_state != 0))
	gdkdev->button_state = 0;
      
      tmp_list = tmp_list->next;
    }

  return Success;
}

static void 
gdk_input_gxi_ungrab_pointer (guint32 time)
{
  GdkInputWindow *input_window;
  GList *tmp_list;

  tmp_list = gdk_input_windows;
  while (tmp_list)
    {
      input_window = (GdkInputWindow *)tmp_list->data;
      if (input_window->grabbed)
	input_window->grabbed = FALSE;
      tmp_list = tmp_list->next;
    }
}

#endif /* XINPUT_GXI */