gdkmain-fb.c

linux下电话本所依赖的一些图形库

}


static gboolean
gdk_fb_manager_callback (GIOChannel *gioc,
			 GIOCondition cond,
			 gpointer data)
{
  struct FBManagerMessage msg;
  GdkFBDisplay *display;
  int res;

  display = data;

  res = recv (display->manager_fd, &msg, sizeof (msg), 0);

  if (res==0)
    {
      g_source_remove (gdk_display->manager_tag);
      /*g_io_channel_unref (kb->io);*/
      close (gdk_display->manager_fd);

    }

  if (res != sizeof (msg))
    {
      g_warning ("Got wrong size message");
      return TRUE;
    }
  
  switch (msg.msg_type)
    {
    case FB_MANAGER_SWITCH_FROM:
      g_print ("Got switch from message\n");
      display->manager_blocked = TRUE;
      gdk_fb_switch_from ();
      msg.msg_type = FB_MANAGER_ACK;
      send (display->manager_fd, &msg, sizeof (msg), 0);
      break;
    case FB_MANAGER_SWITCH_TO:
      g_print ("Got switch to message\n");
      display->manager_blocked = FALSE;
      gdk_fb_switch_to ();
      break;
    default:
      g_warning ("Got unknown message");
    }
  return TRUE;
}

#endif /* ENABLE_FB_MANAGER */

static void
gdk_fb_manager_connect (GdkFBDisplay *display)
{
#ifdef ENABLE_FB_MANAGER
  int fd;
  struct sockaddr_un addr;
  struct msghdr msg = {0};
  struct cmsghdr *cmsg;
  struct ucred credentials;
  struct FBManagerMessage init_msg;
  struct iovec iov;
  char buf[CMSG_SPACE (sizeof (credentials))];  /* ancillary data buffer */
  int *fdptr;
  int res;

  display->manager_blocked = FALSE;
  display->manager_fd = -1;

  fd = socket (PF_UNIX, SOCK_STREAM, 0);
  
  g_print ("socket: %d\n", fd);

  if (fd < 0)
    return;

  addr.sun_family = AF_UNIX;
  strcpy (addr.sun_path, "/tmp/.fb.manager");

  if (connect(fd, (struct sockaddr *)&addr, sizeof (addr)) < 0) 
    {
      g_print ("connect failed\n");
      close (fd);
      return;
    }
  
  credentials.pid = getpid ();
  credentials.uid = geteuid ();
  credentials.gid = getegid ();

  init_msg.msg_type = FB_MANAGER_NEW_CLIENT;
  iov.iov_base = &init_msg;
  iov.iov_len = sizeof (init_msg);

  msg.msg_name = NULL;
  msg.msg_namelen = 0;
  msg.msg_iov = &iov;
  msg.msg_iovlen = 1;
  msg.msg_control = buf;
  msg.msg_controllen = sizeof buf;
  cmsg = CMSG_FIRSTHDR(&msg);
  cmsg->cmsg_level = SOL_SOCKET;
  cmsg->cmsg_type = SCM_CREDENTIALS;
  cmsg->cmsg_len = CMSG_LEN (sizeof (credentials));
  /* Initialize the payload: */
  fdptr = (int *)CMSG_DATA (cmsg);
  memcpy (fdptr, &credentials, sizeof (credentials));
  /* Sum of the length of all control messages in the buffer: */
  msg.msg_controllen = cmsg->cmsg_len;

  res = sendmsg (fd, &msg, 0);

  display->manager_fd = fd;
  display->manager_blocked = TRUE;

  display->manager_tag = g_io_add_watch (g_io_channel_unix_new (fd),
					 G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL,
					 gdk_fb_manager_callback,
					 display);

  init_msg.msg_type = FB_MANAGER_REQUEST_SWITCH_TO_PID;
  init_msg.data = getpid ();

  /* Request a switch-to */
  send (fd, &init_msg, sizeof (init_msg), 0);
#endif
}

static void
gdk_fb_switch (int sig)
{
  if (sig == SIGUSR1)
    {
      ioctl (gdk_display->tty_fd, VT_RELDISP, 1);
      _gdk_fb_is_active_vt = FALSE;
      gdk_shadow_fb_stop_updates ();
      gdk_fb_mouse_close ();
      gdk_fb_keyboard_close ();
    }
  else
    {
      GdkColormap *cmap;
      ioctl (gdk_display->tty_fd, VT_RELDISP, VT_ACKACQ);
      _gdk_fb_is_active_vt = TRUE;

      /* XXX: is it dangerous to put all this stuff in a signal handler? */
      cmap = gdk_screen_get_default_colormap (_gdk_screen);
      gdk_colormap_change (cmap, cmap->size);

      gdk_shadow_fb_update (0, 0,
			    gdk_display->fb_width,
			    gdk_display->fb_height);

      if (!gdk_fb_keyboard_open ())
        g_warning ("Failed to re-initialize keyboard");

      if (!gdk_fb_mouse_open ())
        g_warning ("Failed to re-initialize mouse");

      gdk_fb_redraw_all ();
    }
}

static GdkFBDisplay *
gdk_fb_display_new (void)
{
  GdkFBDisplay *display;
  gchar *fb_filename;
  struct vt_stat vs;
  struct vt_mode vtm;
  int vt, n;
  gchar *s, *send;
  char buf[32];

  display = g_new0 (GdkFBDisplay, 1);

  display->console_fd = open ("/dev/console", O_RDWR);
  if (display->console_fd < 0)
    {
      g_warning ("Can't open /dev/console: %s", strerror (errno));
      g_free (display);
      return NULL;
    }
  
  ioctl (display->console_fd, VT_GETSTATE, &vs);
  display->start_vt = vs.v_active;

  vt = display->start_vt;
  s = getenv("GDK_VT");
  if (s)
    {
      if (g_ascii_strcasecmp ("new", s)==0)
	{
	  n = ioctl (display->console_fd, VT_OPENQRY, &vt);
	  if (n < 0 || vt == -1)
	    g_error("Cannot allocate new VT");
	}
      else
	{
	  vt = strtol (s, &send, 10);
	  if (s==send)
	    {
	      g_warning ("Cannot parse GDK_VT");
	      vt = display->start_vt;
	    }
	}
      
    }

  display->vt = vt;
  
  /* Switch to the new VT */
  if (vt != display->start_vt)
    {
      ioctl (display->console_fd, VT_ACTIVATE, vt);
      ioctl (display->console_fd, VT_WAITACTIVE, vt);
    }
  
  /* Open the tty */
  g_snprintf (buf, sizeof(buf), "/dev/tty%d", vt);
  display->tty_fd = open (buf, O_RDWR|O_NONBLOCK);
  if (display->tty_fd < 0)
    {
      g_warning ("Can't open %s: %s", buf, strerror (errno));
      close (display->console_fd);
      g_free (display);
      return NULL;
    }

  /* set up switch signals */
  if (ioctl (display->tty_fd, VT_GETMODE, &vtm) >= 0)
    {
      signal (SIGUSR1, gdk_fb_switch);
      signal (SIGUSR2, gdk_fb_switch);
      vtm.mode = VT_PROCESS;
      vtm.waitv = 0;
      vtm.relsig = SIGUSR1;
      vtm.acqsig = SIGUSR2;
      ioctl (display->tty_fd, VT_SETMODE, &vtm);
    }
  _gdk_fb_is_active_vt = TRUE;
  
  fb_filename = gdk_get_display ();
  display->fb_fd = open (fb_filename, O_RDWR);
  if (display->fb_fd < 0)
    {
      g_warning ("Can't open %s: %s", fb_filename, strerror (errno));
      g_free (fb_filename);
      close (display->tty_fd);
      close (display->console_fd);
      g_free (display);
      return NULL;
    }
  g_free (fb_filename);

  if (gdk_fb_set_mode (display) < 0)
    {
      close (display->fb_fd);
      close (display->tty_fd);
      close (display->console_fd);
      g_free (display);
      return NULL;
    }

  /* Disable normal text on the console */
  ioctl (display->fb_fd, KDSETMODE, KD_GRAPHICS);

  ioctl (display->fb_fd, FBIOBLANK, 0);

  /* We used to use sinfo.smem_len, but that seemed to be broken in many cases */
  display->fb_mmap = mmap (NULL,
			   display->modeinfo.yres * display->sinfo.line_length,
			   PROT_READ|PROT_WRITE,
			   MAP_SHARED,
			   display->fb_fd,
			   0);
  g_assert (display->fb_mmap != MAP_FAILED);

  if (display->sinfo.visual == FB_VISUAL_TRUECOLOR)
    {
      display->red_byte = display->modeinfo.red.offset >> 3;
      display->green_byte = display->modeinfo.green.offset >> 3;
      display->blue_byte = display->modeinfo.blue.offset >> 3;
    }

#ifdef ENABLE_SHADOW_FB
  if (_gdk_fb_screen_angle % 2 == 0)
    {
      display->fb_width = display->modeinfo.xres;
      display->fb_height = display->modeinfo.yres;
    } 
  else
    {
      display->fb_width = display->modeinfo.yres;
      display->fb_height = display->modeinfo.xres;
    }
  display->fb_stride =
    display->fb_width * (display->modeinfo.bits_per_pixel / 8);
  display->fb_mem = g_malloc(display->fb_height * display->fb_stride);
#else
  display->fb_mem = display->fb_mmap;
  display->fb_width = display->modeinfo.xres;
  display->fb_height = display->modeinfo.yres;
  display->fb_stride = display->sinfo.line_length;
#endif

  return display;
}

static void
gdk_fb_display_destroy (GdkFBDisplay *display)
{
  /* Restore old framebuffer mode */
  ioctl (display->fb_fd, FBIOPUT_VSCREENINFO, &display->orig_modeinfo);
  
  /* Enable normal text on the console */
  ioctl (display->fb_fd, KDSETMODE, KD_TEXT);
  
  munmap (display->fb_mmap, display->modeinfo.yres * display->sinfo.line_length);
  close (display->fb_fd);

  ioctl (display->console_fd, VT_ACTIVATE, display->start_vt);
  ioctl (display->console_fd, VT_WAITACTIVE, display->start_vt);
  if (display->vt != display->start_vt)
    ioctl (display->console_fd, VT_DISALLOCATE, display->vt);
  
  close (display->tty_fd);
  close (display->console_fd);
  g_free (display);
}

void
_gdk_windowing_init (void)
{
  if (gdk_initialized)
    return;

  /* Create new session and become session leader */
  setsid();

  gdk_display = gdk_fb_display_new ();

  if (!gdk_display)
    return;

  gdk_shadow_fb_init ();
  
  gdk_fb_manager_connect (gdk_display);

  if (!gdk_fb_keyboard_init (!gdk_display->manager_blocked))
    {
      g_warning ("Failed to initialize keyboard");
      gdk_fb_display_destroy (gdk_display);
      gdk_display = NULL;
      return;
    }
  
  if (!gdk_fb_mouse_init (!gdk_display->manager_blocked))
    {
      g_warning ("Failed to initialize mouse");
      gdk_fb_keyboard_close ();
      gdk_fb_display_destroy (gdk_display);
      gdk_display = NULL;
      return;
    }

  /* Although atexit is evil, we need it here because otherwise the
   * keyboard is left in a bad state. you can still run 'reset' but
   * that gets annoying after running testgtk for the 20th time.
   */
  g_atexit(_gdk_windowing_exit);

  gdk_initialized = TRUE;

  _gdk_selection_property = gdk_atom_intern ("GDK_SELECTION", FALSE);

}

void
_gdk_windowing_set_default_display (GdkDisplay *display)
{
}

/*
 *--------------------------------------------------------------
 * gdk_pointer_grab
 *
 *   Grabs the pointer to a specific window
 *
 * Arguments:
 *   "window" is the window which will receive the grab
 *   "owner_events" specifies whether events will be reported as is,
 *     or relative to "window"
 *   "event_mask" masks only interesting events
 *   "confine_to" limits the cursor movement to the specified window
 *   "cursor" changes the cursor for the duration of the grab
 *   "time" specifies the time
 *
 * Results:
 *
 * Side effects:
 *   requires a corresponding call to gdk_pointer_ungrab
 *
 *--------------------------------------------------------------
 */

GdkGrabStatus
gdk_pointer_grab (GdkWindow *	  window,
		  gint		  owner_events,
		  GdkEventMask	  event_mask,
		  GdkWindow *	  confine_to,
		  GdkCursor *	  cursor,
		  guint32	  time)
{
  return gdk_fb_pointer_grab (window,
			      owner_events,
			      event_mask,
			      confine_to,
			      cursor,
			      time, FALSE);
}

static gboolean _gdk_fb_pointer_implicit_grab = FALSE;

GdkGrabStatus
gdk_fb_pointer_grab (GdkWindow *	  window,
		     gint		  owner_events,
		     GdkEventMask	  event_mask,
		     GdkWindow *	  confine_to,
		     GdkCursor *	  cursor,
		     guint32	          time,
		     gboolean             implicit_grab)
{
  g_return_val_if_fail (window != NULL, 0);
  g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
  g_return_val_if_fail (confine_to == NULL || GDK_IS_WINDOW (confine_to), 0);

  if (_gdk_fb_pointer_grab_window)
    {
      if (implicit_grab && !_gdk_fb_pointer_implicit_grab)
	return GDK_GRAB_ALREADY_GRABBED;

      gdk_pointer_ungrab (time);
    }

  gdk_fb_window_send_crossing_events (NULL,
				      window,
				      GDK_CROSSING_GRAB);  

  if (event_mask & GDK_BUTTON_MOTION_MASK)
      event_mask |=
	GDK_BUTTON1_MOTION_MASK |
	GDK_BUTTON2_MOTION_MASK |
	GDK_BUTTON3_MOTION_MASK;
  
  _gdk_fb_pointer_implicit_grab = implicit_grab;

  _gdk_fb_pointer_grab_window = gdk_window_ref (window);
  _gdk_fb_pointer_grab_owner_events = owner_events;

  _gdk_fb_pointer_grab_confine = confine_to ? gdk_window_ref (confine_to) : NULL;
  _gdk_fb_pointer_grab_events = event_mask;
  _gdk_fb_pointer_grab_cursor = cursor ? gdk_cursor_ref (cursor) : NULL;


  
  if (cursor)
    gdk_fb_cursor_reset ();

  return GDK_GRAB_SUCCESS;
}

/*
 *--------------------------------------------------------------
 * gdk_display_pointer_ungrab
 *
 *   Releases any pointer grab
 *
 * Arguments:
 *
 * Results:
 *
 * Side effects:
 *
 *--------------------------------------------------------------
 */

void
gdk_display_pointer_ungrab (GdkDisplay *display,
			    guint32     time)
{
  gdk_fb_pointer_ungrab (time, FALSE);
}

void
gdk_fb_pointer_ungrab (guint32 time, gboolean implicit_grab)
{
  gboolean have_grab_cursor = _gdk_fb_pointer_grab_cursor && 1;
  GdkWindow *mousewin;
  GdkWindow *old_grab_window;
  
  if (!_gdk_fb_pointer_grab_window)
    return;

  if (implicit_grab && !_gdk_fb_pointer_implicit_grab)
    return;

  if (_gdk_fb_pointer_grab_confine)
    gdk_window_unref (_gdk_fb_pointer_grab_confine);
  _gdk_fb_pointer_grab_confine = NULL;

  if (_gdk_fb_pointer_grab_cursor)
    gdk_cursor_unref (_gdk_fb_pointer_grab_cursor);
  _gdk_fb_pointer_grab_cursor = NULL;

  if (have_grab_cursor)
    gdk_fb_cursor_reset ();

  old_grab_window = _gdk_fb_pointer_grab_window;
  
  _gdk_fb_pointer_grab_window = NULL;

  _gdk_fb_pointer_implicit_grab = FALSE;

  mousewin = gdk_window_at_pointer (NULL, NULL);
  gdk_fb_window_send_crossing_events (old_grab_window,
				      mousewin,
				      GDK_CROSSING_UNGRAB);
  
  if (old_grab_window)
    gdk_window_unref (old_grab_window);
}

/*
 *--------------------------------------------------------------
 * gdk_display_pointer_is_grabbed
 *
 *   Tell wether there is an active x pointer grab in effect
 *
 * Arguments:
 *
 * Results:
 *
 * Side effects:
 *
 *--------------------------------------------------------------
 */

gint