gdkevents-x11.c

linux下电话本所依赖的一些图形库

      else
	return_val = FALSE;

      break;
      
    case SelectionClear:
      GDK_NOTE (EVENTS,
		g_message ("selection clear:\twindow: %ld",
			   xevent->xproperty.window));

      if (_gdk_selection_filter_clear_event (&xevent->xselectionclear))
	{
	  event->selection.type = GDK_SELECTION_CLEAR;
	  event->selection.window = window;
	  event->selection.selection = gdk_x11_xatom_to_atom_for_display (display, xevent->xselectionclear.selection);
	  event->selection.time = xevent->xselectionclear.time;
	}
      else
	return_val = FALSE;
	  
      break;
      
    case SelectionRequest:
      GDK_NOTE (EVENTS,
		g_message ("selection request:\twindow: %ld",
			   xevent->xproperty.window));
      
      event->selection.type = GDK_SELECTION_REQUEST;
      event->selection.window = window;
      event->selection.selection = gdk_x11_xatom_to_atom_for_display (display, xevent->xselectionrequest.selection);
      event->selection.target = gdk_x11_xatom_to_atom_for_display (display, xevent->xselectionrequest.target);
      event->selection.property = gdk_x11_xatom_to_atom_for_display (display, xevent->xselectionrequest.property);
      event->selection.requestor = xevent->xselectionrequest.requestor;
      event->selection.time = xevent->xselectionrequest.time;
      
      break;
      
    case SelectionNotify:
      GDK_NOTE (EVENTS,
		g_message ("selection notify:\twindow: %ld",
			   xevent->xproperty.window));
      
      
      event->selection.type = GDK_SELECTION_NOTIFY;
      event->selection.window = window;
      event->selection.selection = gdk_x11_xatom_to_atom_for_display (display, xevent->xselection.selection);
      event->selection.target = gdk_x11_xatom_to_atom_for_display (display, xevent->xselection.target);
      event->selection.property = gdk_x11_xatom_to_atom_for_display (display, xevent->xselection.property);
      event->selection.time = xevent->xselection.time;
      
      break;
      
    case ColormapNotify:
      GDK_NOTE (EVENTS,
		g_message ("colormap notify:\twindow: %ld",
			   xevent->xcolormap.window));
      
      /* Not currently handled */
      return_val = FALSE;
      break;
      
    case ClientMessage:
      {
	GList *tmp_list;
	GdkFilterReturn result = GDK_FILTER_CONTINUE;
	GdkAtom message_type = gdk_x11_xatom_to_atom_for_display (display, xevent->xclient.message_type);

	GDK_NOTE (EVENTS,
		  g_message ("client message:\twindow: %ld",
			     xevent->xclient.window));
	
	tmp_list = display_x11->client_filters;
	while (tmp_list)
	  {
	    GdkClientFilter *filter = tmp_list->data;
	    tmp_list = tmp_list->next;
	    
	    if (filter->type == message_type)
	      {
		result = (*filter->function) (xevent, event, filter->data);
		if (result != GDK_FILTER_CONTINUE)
		  break;
	      }
	  }

	switch (result)
	  {
	  case GDK_FILTER_REMOVE:
	    return_val = FALSE;
	    break;
	  case GDK_FILTER_TRANSLATE:
	    return_val = TRUE;
	    break;
	  case GDK_FILTER_CONTINUE:
	    /* Send unknown ClientMessage's on to Gtk for it to use */
            if (window_private == NULL)
              {
                return_val = FALSE;
              }
            else
              {
                event->client.type = GDK_CLIENT_EVENT;
                event->client.window = window;
                event->client.message_type = message_type;
                event->client.data_format = xevent->xclient.format;
                memcpy(&event->client.data, &xevent->xclient.data,
                       sizeof(event->client.data));
              }
            break;
          }
      }
      
      break;
      
    case MappingNotify:
      GDK_NOTE (EVENTS,
		g_message ("mapping notify"));
      
      /* Let XLib know that there is a new keyboard mapping.
       */
      XRefreshKeyboardMapping (&xevent->xmapping);
      _gdk_keymap_keys_changed (display);
      return_val = FALSE;
      break;

    default:
#ifdef HAVE_XKB
      if (xevent->type == display_x11->xkb_event_type)
	{
	  XkbEvent *xkb_event = (XkbEvent *)xevent;

	  switch (xkb_event->any.xkb_type)
	    {
	    case XkbNewKeyboardNotify:
	    case XkbMapNotify:
	      _gdk_keymap_keys_changed (display);

	      return_val = FALSE;
	      break;
	      
	    case XkbStateNotify:
	      _gdk_keymap_state_changed (display);
	      break;
	    }
	}
      else
#endif
#ifdef HAVE_XFIXES
      if (xevent->type - display_x11->xfixes_event_base == XFixesSelectionNotify)
	{
	  XFixesSelectionNotifyEvent *selection_notify = (XFixesSelectionNotifyEvent *)xevent;
	  event->owner_change.type = GDK_OWNER_CHANGE;
	  event->owner_change.window = window;
	  event->owner_change.owner = selection_notify->owner;
	  event->owner_change.reason = selection_notify->subtype;
	  event->owner_change.selection = 
	    gdk_x11_xatom_to_atom_for_display (display, 
					       selection_notify->selection);
	  event->owner_change.time = selection_notify->timestamp;
	  event->owner_change.selection_time = selection_notify->selection_timestamp;

	  return_val = TRUE;
	}
      else
#endif
	{
	  /* something else - (e.g., a Xinput event) */
	  
	  if (window_private &&
	      !GDK_WINDOW_DESTROYED (window_private) &&
	      (window_private->extension_events != 0))
	    return_val = _gdk_input_other_event(event, xevent, window);
	  else
	    return_val = FALSE;
	  
	  break;
	}
    }

 done:
  if (return_val)
    {
      if (event->any.window)
	g_object_ref (event->any.window);
      if (((event->any.type == GDK_ENTER_NOTIFY) ||
	   (event->any.type == GDK_LEAVE_NOTIFY)) &&
	  (event->crossing.subwindow != NULL))
	g_object_ref (event->crossing.subwindow);
    }
  else
    {
      /* Mark this event as having no resources to be freed */
      event->any.window = NULL;
      event->any.type = GDK_NOTHING;
    }
  
  if (window)
    g_object_unref (window);
  
  return return_val;
}

static GdkFilterReturn
gdk_wm_protocols_filter (GdkXEvent *xev,
			 GdkEvent  *event,
			 gpointer data)
{
  XEvent *xevent = (XEvent *)xev;
  GdkWindow *win = event->any.window;
  GdkDisplay *display;
  Atom atom;

  if (!win)
      return GDK_FILTER_REMOVE;    

  display = GDK_WINDOW_DISPLAY (win);
  atom = (Atom)xevent->xclient.data.l[0];

  if (atom == gdk_x11_get_xatom_by_name_for_display (display, "WM_DELETE_WINDOW"))
    {
  /* The delete window request specifies a window
   *  to delete. We don't actually destroy the
   *  window because "it is only a request". (The
   *  window might contain vital data that the
   *  program does not want destroyed). Instead
   *  the event is passed along to the program,
   *  which should then destroy the window.
   */
      GDK_NOTE (EVENTS,
		g_message ("delete window:\t\twindow: %ld",
			   xevent->xclient.window));
      
      event->any.type = GDK_DELETE;

      gdk_x11_window_set_user_time (win, xevent->xclient.data.l[1]);

      return GDK_FILTER_TRANSLATE;
    }
  else if (atom == gdk_x11_get_xatom_by_name_for_display (display, "WM_TAKE_FOCUS"))
    {
      GdkToplevelX11 *toplevel = _gdk_x11_window_get_toplevel (event->any.window);
      GdkWindowObject *private = (GdkWindowObject *)win;

      /* There is no way of knowing reliably whether we are viewable;
       * _gdk_x11_set_input_focus_safe() traps errors asynchronously.
       */
      if (toplevel && private->accept_focus)
	_gdk_x11_set_input_focus_safe (display, toplevel->focus_window,
				       RevertToParent,
				       xevent->xclient.data.l[1]);

      return GDK_FILTER_REMOVE;
    }
  else if (atom == gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_PING") &&
	   !_gdk_x11_display_is_root_window (display,
					     xevent->xclient.window))
    {
      XEvent xev = *xevent;
      
      xev.xclient.window = GDK_WINDOW_XROOTWIN (win);
      XSendEvent (GDK_WINDOW_XDISPLAY (win), 
		  xev.xclient.window,
		  False, 
		  SubstructureRedirectMask | SubstructureNotifyMask, &xev);

      return GDK_FILTER_REMOVE;
    }
  else if (atom == gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_SYNC_REQUEST") &&
	   GDK_DISPLAY_X11 (display)->use_sync)
    {
      GdkToplevelX11 *toplevel = _gdk_x11_window_get_toplevel (event->any.window);
      if (toplevel)
	{
#ifdef HAVE_XSYNC
	  XSyncIntsToValue (&toplevel->pending_counter_value, 
			    xevent->xclient.data.l[2], 
			    xevent->xclient.data.l[3]);
#endif
	}
      return GDK_FILTER_REMOVE;
    }
  
  return GDK_FILTER_CONTINUE;
}

void
_gdk_events_queue (GdkDisplay *display)
{
  GList *node;
  GdkEvent *event;
  XEvent xevent;
  Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);

  while (!_gdk_event_queue_find_first(display) && XPending (xdisplay))
    {
      XNextEvent (xdisplay, &xevent);

      switch (xevent.type)
	{
	case KeyPress:
	case KeyRelease:
	  break;
	default:
	  if (XFilterEvent (&xevent, None))
	    continue;
	}
      
      event = gdk_event_new (GDK_NOTHING);
      
      event->any.window = NULL;
      event->any.send_event = xevent.xany.send_event ? TRUE : FALSE;

      ((GdkEventPrivate *)event)->flags |= GDK_EVENT_PENDING;

      node = _gdk_event_queue_append (display, event);

      if (gdk_event_translate (display, event, &xevent, FALSE))
	{
	  ((GdkEventPrivate *)event)->flags &= ~GDK_EVENT_PENDING;
	}
      else
	{
	  _gdk_event_queue_remove_link (display, node);
	  g_list_free_1 (node);
	  gdk_event_free (event);
	}
    }
}

static gboolean  
gdk_event_prepare (GSource  *source,
		   gint     *timeout)
{
  GdkDisplay *display = ((GdkDisplaySource*)source)->display;
  gboolean retval;
  
  GDK_THREADS_ENTER ();

  *timeout = -1;
  retval = (_gdk_event_queue_find_first (display) != NULL || 
	    gdk_check_xpending (display));
  
  GDK_THREADS_LEAVE ();

  return retval;
}

static gboolean  
gdk_event_check (GSource *source) 
{
  GdkDisplaySource *display_source = (GdkDisplaySource*)source;
  gboolean retval;

  GDK_THREADS_ENTER ();

  if (display_source->event_poll_fd.revents & G_IO_IN)
    retval = (_gdk_event_queue_find_first (display_source->display) != NULL || 
	      gdk_check_xpending (display_source->display));
  else
    retval = FALSE;

  GDK_THREADS_LEAVE ();

  return retval;
}

static gboolean  
gdk_event_dispatch (GSource    *source,
		    GSourceFunc callback,
		    gpointer    user_data)
{
  GdkDisplay *display = ((GdkDisplaySource*)source)->display;
  GdkEvent *event;
 
  GDK_THREADS_ENTER ();

  _gdk_events_queue (display);
  event = _gdk_event_unqueue (display);

  if (event)
    {
      if (_gdk_event_func)
	(*_gdk_event_func) (event, _gdk_event_data);
      
      gdk_event_free (event);
    }
  
  GDK_THREADS_LEAVE ();

  return TRUE;
}

/**
 * gdk_event_send_client_message_for_display:
 * @display: the #GdkDisplay for the window where the message is to be sent.
 * @event: the #GdkEvent to send, which should be a #GdkEventClient.
 * @winid: the window to send the client message to.
 *
 * On X11, sends an X ClientMessage event to a given window. On
 * Windows, sends a message registered with the name
 * GDK_WIN32_CLIENT_MESSAGE.
 *
 * This could be used for communicating between different
 * applications, though the amount of data is limited to 20 bytes on
 * X11, and to just four bytes on Windows.
 *
 * Returns: non-zero on success.
 *
 * Since: 2.2
 */
gboolean
gdk_event_send_client_message_for_display (GdkDisplay     *display,
					   GdkEvent       *event,
					   GdkNativeWindow winid)
{
  XEvent sev;
  
  g_return_val_if_fail(event != NULL, FALSE);

  /* Set up our event to send, with the exception of its target window */
  sev.xclient.type = ClientMessage;
  sev.xclient.display = GDK_DISPLAY_XDISPLAY (display);
  sev.xclient.format = event->client.data_format;
  sev.xclient.window = winid;
  memcpy(&sev.xclient.data, &event->client.data, sizeof (sev.xclient.data));
  sev.xclient.message_type = gdk_x11_atom_to_xatom_for_display (display, event->client.message_type);
  
  return _gdk_send_xevent (display, winid, False, NoEventMask, &sev);
}



/* Sends a ClientMessage to all toplevel client windows */
static gboolean
gdk_event_send_client_message_to_all_recurse (GdkDisplay *display,
					      XEvent     *xev, 
					      guint32     xid,
					      guint       level)
{
  Atom type = None;
  int format;
  unsigned long nitems, after;
  unsigned char *data;
  Window *ret_children, ret_root, ret_parent;
  unsigned int ret_nchildren;
  gboolean send = FALSE;
  gboolean found = FALSE;
  gboolean result = FALSE;
  int i;
  
  gdk_error_trap_push ();
  
  if (XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), xid, 
			  gdk_x11_get_xatom_by_name_for_display (display, "WM_STATE"),
			  0, 0, False, AnyPropertyType,
			  &type, &format, &nitems, &after, &data) != Success)
    goto out;
  
  if (type)
    {
      send = TRUE;
      XFree (data);
    }
  else
    {
      /* OK, we're all set, now let's