gdkmouse-fb.c

linux下电话本所依赖的一些图形库

	}
  
      mouse->packet_nbytes += n;
      
      if (mouse->packet_nbytes == dev->packet_size)
	{
	  if (dev->parse_packet (mouse, &got_motion))
	    mouse->packet_nbytes = 0;
	}
    }
  
  if (got_motion)
    handle_mouse_movement (mouse);
  
  return TRUE;
}

static gint
gdk_fb_mouse_dev_open (char *devname, gint mode)
{
  gint fd;
  
  /* Use nonblocking mode to open, to not hang on device */
  fd = open (devname, mode | O_NONBLOCK);
  return fd;
}

static gboolean
write_all (gint   fd,
	   gchar *buf,
	   gsize  to_write)
{
  while (to_write > 0)
    {
      gssize count = write (fd, buf, to_write);
      if (count < 0)
	{
	  if (errno != EINTR)
	    return FALSE;
	}
      else
	{
	  to_write -= count;
	  buf += count;
	}
    }

  return TRUE;
}

static gboolean
gdk_fb_mouse_ps2_open (GdkFBMouse *mouse)
{
  gint fd;
  guchar buf[7];
  int i = 0;

  fd = gdk_fb_mouse_dev_open (mouse->file, O_RDWR);
  if (fd < 0)
    {
      g_print ("Error opening %s: %s\n", mouse->file, strerror (errno));
      return FALSE;
    }

  /* From xf86_Mouse.c */
  buf[i++] = 230; /* 1:1 scaling */
  buf[i++] = 244; /* enable mouse */
  buf[i++] = 243; /* Sample rate */
  buf[i++] = 200;
  buf[i++] = 232; /* device resolution */
  buf[i++] = 1;

  if (!write_all (fd, buf, i))
    {
      close (fd);
      return FALSE;
    }
  
  usleep (10000); /* sleep 10 ms, then read whatever junk we can get from the mouse, in a vain attempt
		     to get synchronized with the event stream */
  
  while ((i = read (fd, buf, sizeof(buf))) > 0)
    g_print ("Got %d bytes of junk from psaux\n", i);
  
  mouse->fd = fd;
  return TRUE;
}

static gboolean
gdk_fb_mouse_imps2_open (GdkFBMouse *mouse)
{
  gint fd;
  guchar buf[7];
  int i = 0;

  fd = gdk_fb_mouse_dev_open (mouse->file, O_RDWR);
  if (fd < 0)
    {
      g_print ("Error opening %s: %s\n", mouse->file, strerror (errno));
      return FALSE;
    }

  i = 0;
  buf[i++] = 243; /* Sample rate */
  buf[i++] = 200;
  buf[i++] = 243; /* Sample rate */
  buf[i++] = 100;
  buf[i++] = 243; /* Sample rate */
  buf[i++] = 80;
  buf[i++] = 242;

  if (!write_all (fd, buf, i))
    {
      close (fd);
      return FALSE;
    }

  if (read (fd, buf, 1) != 1)
    {
      close (fd);
      return FALSE;
    }
  
  i = 0;
  buf[i++] = 230; /* 1:1 scaling */
  buf[i++] = 244; /* enable mouse */
  buf[i++] = 243; /* Sample rate */
  buf[i++] = 100;
  buf[i++] = 232; /* device resolution */
  buf[i++] = 3;

  if (!write_all (fd, buf, i))
    {
      close (fd);
      return FALSE;
    }
  
  mouse->fd = fd;
  return TRUE;
}

static void
gdk_fb_mouse_ps2_close (GdkFBMouse *mouse)
{
  close (mouse->fd);
  mouse->fd = -1;
}

static gboolean
gdk_fb_mouse_ps2_packet (GdkFBMouse *mouse, gboolean *got_motion)
{
  int dx=0, dy=0;
  gboolean new_button1, new_button2, new_button3;
  guchar *buf;

  buf = mouse->mouse_packet;
      
  new_button1 = (buf[0] & 1) && 1;
  new_button3 = (buf[0] & 2) && 1;
  new_button2 = (buf[0] & 4) && 1;
  if (mouse->dev->packet_size == 4 && buf[3] != 0)
    handle_mouse_scroll (mouse, buf[3] & 0x80);

  if (*got_motion &&
      (new_button1 != mouse->button_pressed[0] ||
       new_button2 != mouse->button_pressed[1] ||
       new_button3 != mouse->button_pressed[2]))
    {
      /* If a mouse button state changes we need to get correct ordering with enter/leave events,
	 so push those out via handle_mouse_input */
      *got_motion = FALSE;
      handle_mouse_movement (mouse);
    }

  if (new_button1 != mouse->button_pressed[0])
    {
      mouse->button_pressed[0] = new_button1; 
      send_button_event (mouse, 1, new_button1);
    }
  
  if (new_button2 != mouse->button_pressed[1])
    {
      mouse->button_pressed[1] = new_button2;
      send_button_event (mouse, 2, new_button2);
    }
  
  if (new_button3 != mouse->button_pressed[2])
    {
      mouse->button_pressed[2] = new_button3; 
      send_button_event (mouse, 3, new_button3);
    }
      
  if (buf[1] != 0)
    dx = ((buf[0] & 0x10) ? ((gint)buf[1])-256 : buf[1]);
  else
    dx = 0;
  if (buf[2] != 0)
    dy = -((buf[0] & 0x20) ? ((gint)buf[2])-256 : buf[2]);
  else
    dy = 0;
  
  mouse->x += dx;
  mouse->y += dy;
  
  if (dx || dy)
    *got_motion = TRUE;

  return TRUE;
}


static gboolean
gdk_fb_mouse_ms_open (GdkFBMouse   *mouse)
{
  gint fd;
  gint i;
  guchar buf[7];
  struct termios tty;

  fd = gdk_fb_mouse_dev_open (mouse->file, O_RDWR);
  if (fd < 0)
    {
      g_print ("Error opening %s: %s\n", mouse->file, strerror (errno));
      return FALSE;
    }

  while ((i = read (fd, buf, sizeof(buf))) > 0)
    g_print ("Got %d bytes of junk from %s\n", i, mouse->file);

  tcgetattr (fd, &tty);
  tty.c_iflag = IGNBRK | IGNPAR;
  tty.c_cflag = CREAD|CLOCAL|HUPCL|CS7|B1200;
  tty.c_oflag = 0;
  tty.c_lflag = 0;
  tty.c_line = 0;
  tty.c_cc[VTIME] = 0;
  tty.c_cc[VMIN] = 1;
  tcsetattr (fd, TCSAFLUSH, &tty);

  if (!write_all (fd, "*n", 2))
    {
      close (fd);
      return FALSE;
    }

  mouse->fd = fd;
  return TRUE;
}

static void
gdk_fb_mouse_ms_close (GdkFBMouse   *mouse)
{
  close (mouse->fd);
  mouse->fd = -1;
}

static gboolean
gdk_fb_mouse_ms_packet (GdkFBMouse   *mouse,
			gboolean     *got_motion)
{
  int dx=0, dy=0;
  gboolean new_button1, new_button2, new_button3;
  guchar *buf;
  static guchar prev = 0;

  buf = mouse->mouse_packet;

  /* handling of third button is adapted from gpm ms driver */
  if (buf[0] == 0x40 && !(prev|buf[1]|buf[2]))
    {
      new_button1 = 0;
      new_button2 = 1;
      new_button3 = 0;
    }
  else
    {
      new_button1 = (buf[0] & 0x20) && 1;
      new_button2 = 0;
      new_button3 = (buf[0] & 0x10) && 1;
    }
  prev = (new_button1 << 2) | (new_button2 << 1) | (new_button3 << 0);

  if (*got_motion &&
      (new_button1 != mouse->button_pressed[0] ||
       new_button2 != mouse->button_pressed[1] ||
       new_button3 != mouse->button_pressed[2]))
    {
      /* If a mouse button state changes we need to get correct ordering with enter/leave events,
	 so push those out via handle_mouse_input */
      *got_motion = FALSE;
      handle_mouse_movement (mouse);
    }

  if (new_button1 != mouse->button_pressed[0])
    {
      mouse->button_pressed[0] = new_button1; 
      send_button_event (mouse, 1, new_button1);
    }
  
  if (new_button2 != mouse->button_pressed[1])
    {
      mouse->button_pressed[1] = new_button2;
      send_button_event (mouse, 2, new_button2);
    }
  
  if (new_button3 != mouse->button_pressed[2])
    {
      mouse->button_pressed[2] = new_button3; 
      send_button_event (mouse, 3, new_button3);
    }

  dx = (signed char)(((buf[0] & 0x03) << 6) | (buf[1] & 0x3F));
  dy = (signed char)(((buf[0] & 0x0C) << 4) | (buf[2] & 0x3F));
  
  mouse->x += dx;
  mouse->y += dy;
  
  if (dx || dy)
    *got_motion = TRUE;

  return TRUE;
}

static gboolean
gdk_fb_mouse_fidmour_open (GdkFBMouse   *mouse)
{
  gint fd;

  fd = gdk_fb_mouse_dev_open (mouse->file, O_RDONLY);
  if (fd < 0)
    {
      g_print ("Error opening %s: %s\n", mouse->file, strerror (errno));
      return FALSE;
    }

  mouse->fd = fd;
  return TRUE;
}

static void
gdk_fb_mouse_fidmour_close (GdkFBMouse   *mouse)
{
  close (mouse->fd);
}

static gboolean
gdk_fb_mouse_fidmour_packet (GdkFBMouse   *mouse,
			     gboolean     *got_motion)
{
  int n;
  gboolean btn_down = 0;
  gdouble x = 0.0, y = 0.0;

  n = 0;
  if (!(mouse->mouse_packet[0] & 0x80))
    {
      int i;
      /* We haven't received any of the packet yet but there is no header at the beginning */
      for (i = 1; i < mouse->packet_nbytes; i++)
	{
	  if (mouse->mouse_packet[i] & 0x80)
	    {
	      n = i;
	      break;
	    }
	}
    }
  else if (mouse->packet_nbytes > 1 &&
	   ((mouse->mouse_packet[0] & 0x90) == 0x90))
    {
      /* eat the 0x90 and following byte, no clue what it's for */
      n = 2;
    }
  else
    {
      switch (mouse->mouse_packet[0] & 0xF)
	{
	case 2:
	  btn_down = 0;
	  break;
	case 1:
	case 0:
	  btn_down = 1;
	  break;
	default:
	  g_assert_not_reached ();
	  break;
	}
      
      x = mouse->mouse_packet[1] + (mouse->mouse_packet[2] << 7);
      if (x > 8192)
	x -= 16384;
      y = mouse->mouse_packet[3] + (mouse->mouse_packet[4] << 7);
      if (y > 8192)
	y -= 16384;
      /* Now map touchscreen coords to screen coords */
      x *= ((double)gdk_display->fb_width)/4096.0;
      y *= ((double)gdk_display->fb_height)/4096.0;
    }
  
  if (n)
    {
      memmove (mouse->mouse_packet, mouse->mouse_packet+n, mouse->packet_nbytes-n);
      mouse->packet_nbytes -= n;
      return FALSE;
    }

  if (btn_down != mouse->button_pressed[0])
    {
      if (*got_motion)
	{
	  /* If a mouse button state changes we need to get correct
	     ordering with enter/leave events, so push those out
	     via handle_mouse_input */
	  *got_motion = FALSE;
	  handle_mouse_movement (mouse);
	}
      
      mouse->button_pressed[0] = btn_down;
      send_button_event (mouse, 1, btn_down);
    }
  
  if (fabs(x - mouse->x) >= 1.0 || fabs(x - mouse->y) >= 1.0)
    {
      *got_motion = TRUE;
      mouse->x = x;
      mouse->y = y;
    }
  
  return TRUE;
}