efl/src/lib/ecore_fb/ecore_fb_ps2.c

typedef struct _Ecore_Fb_Ps2_Event Ecore_Fb_Ps2_Event;
struct _Ecore_Fb_Ps2_Event
{
   unsigned char button;
   unsigned char x;
   unsigned char y;
   unsigned char z;
};

static int _ecore_fb_ps2_event_byte_count = 0;
static Ecore_Fb_Ps2_Event _ecore_fb_ps2_event;
static int _ecore_fb_ps2_fd = 0;
static Eina_Bool _ecore_fb_ps2_fd_handler(void *data, Ecore_Fd_Handler *fd_handler);

int
ecore_fb_ps2_init(void)
{
   _ecore_fb_ps2_fd = open("/dev/psaux", O_RDWR);
   if (_ecore_fb_ps2_fd >= 0)
     {
        prev_flags = fcntl(_ecore_fb_ps2_fd, F_GETFL);
        fcntl(_ecore_fb_ps2_fd, F_SETFL, prev_flags | O_NONBLOCK);
        _ecore_fb_ts_fd_handler_handle = ecore_main_fd_handler_add(_ecore_fb_ps2_fd,
                                                                   ECORE_FD_READ,
                                                                   _ecore_fb_ps2_fd_handler, NULL, NULL, NULL);
        if (!_ecore_fb_ts_fd_handler_handle)
          {
             close(_ecore_fb_ps2_fd);
             return 0;
          }
        return 1;
     }
   return 0;
}

void
ecore_fb_ps2_shutdown(void)
{
   if (_ecore_fb_ps2_fd > 0) close(_ecore_fb_ps2_fd);
   _ecore_fb_ps2_fd = 0;
}

static Eina_Bool
_ecore_fb_ps2_fd_handler(void *data EINA_UNUSED, Ecore_Fd_Handler *fd_handler EINA_UNUSED)
{
   static int prev_x = 0, prev_y = 0, prev_button = 0;
   static double last_time = 0;
   static double last_last_time = 0;
   int v = 0;

   do
     {
        int x, y, button, i;
        int num;
        char *ptr;
        double t;
        static int did_double = 0;
        static int did_triple = 0;

        ptr = (char *)&(_ecore_fb_ps2_event);
        ptr += _ecore_fb_ps2_event_byte_count;
        num = sizeof(Ecore_Fb_Ps2_Event) - _ecore_fb_ps2_event_byte_count;
        v = read(_ecore_fb_ps2_fd, ptr, num);
        if (v < 0) return EINA_TRUE;
        _ecore_fb_ps2_event_byte_count += v;
        if (v < num) return EINA_TRUE;
        t = ecore_loop_time_get();
        _ecore_fb_ps2_event_byte_count = 0;
        if (_ecore_fb_ps2_event.button & 0x10)
           x = prev_x + (0xffffff00 | _ecore_fb_ps2_event.x);
        else
           x = prev_x + _ecore_fb_ps2_event.x;
        if (_ecore_fb_ps2_event.button & 0x20)
           y = prev_y - (0xffffff00 | _ecore_fb_ps2_event.y);
        else
           y = prev_y - _ecore_fb_ps2_event.y;
        button = _ecore_fb_ps2_event.button & 0x7;
        if (x < 0) x = 0;
        if (y < 0) y = 0;
        if (x >= _ecore_fb_console_w) x = _ecore_fb_console_w - 1;
        if (y >= _ecore_fb_console_h) y = _ecore_fb_console_h - 1;
        /* add event to queue */
        /* always add a move event */
        if (1)
          {
             /* MOVE: mouse is down and was */
             Ecore_Event_Mouse_Move *e;

             e = calloc(1, sizeof(Ecore_Fb_Event_Mouse_Move));
             if (!e) goto retry;
             e->x = x;
             e->y = y;
             e->root.x = e->x;
             e->root.y = e->y;
             e->window = 1;
             e->event_window = e->window;
             e->root_window = e->window;
             e->same_screen = 1;
             e->timestamp = ecore_loop_time_get() * 1000.0;
             ecore_event_add(ECORE_EVENT_MOUSE_MOVE, e, NULL, NULL);
          }
        for (i = 1; i <= 3; i++)
          {
             int mask;

             mask = 1 << (i - 1);
             if (((button & mask)) && (!(prev_button & mask)))
               {
                  /* DOWN: mouse is down, but was not now */
                  Ecore_Event_Mouse_Button *e;

                  e = calloc(1, sizeof(Ecore_Event_Mouse_Button));
                  if (!e) goto retry;
                  e->x = x;
                  e->y = y;
                  e->root.x = e->x;
                  e->root.y = e->y;
                  e->button = i;
                  e->window = 1;
                  e->event_window = e->window;
                  e->root_window = e->window;
                  e->same_screen = 1;
                  if ((t - last_time) <= _ecore_fb_double_click_time)
                    {
                       e->double_click = 1;
                       did_double = 1;
                    }
                  else
                    {
                       did_double = 0;
                       did_triple = 0;
                    }
                  if ((t - last_last_time) <= (2 * _ecore_fb_double_click_time))
                    {
                       did_triple = 1;
                       e->triple_click = 1;
                    }
                  else
                    {
                       did_triple = 0;
                    }
                  e->timestamp = ecore_loop_time_get() * 1000.0;
                  ecore_event_add(ECORE_EVENT_MOUSE_BUTTON_DOWN, e, NULL, NULL);
               }
             else if ((!(button & mask)) && ((prev_button & mask)))
               {
                  /* UP: mouse was down, but is not now */
                  Ecore_Event_Mouse_Button *e;

                  e = calloc(1, sizeof(Ecore_Event_Mouse_Button));
                  if (!e) goto retry;
                  e->x = x;
                  e->y = y;
                  e->root.x = e->x;
                  e->root.y = e->y;
                  e->button = i;
                  e->window = 1;
                  e->event_window = e->window;
                  e->root_window = e->window;
                  e->same_screen = 1;
                  if (did_double)
                     e->double_click = 1;
                  if (did_triple)
                     e->triple_click = 1;
                  e->timestamp = ecore_loop_time_get() * 1000.0;
                  ecore_event_add(ECORE_EVENT_MOUSE_BUTTON_UP, e, NULL, NULL);
               }
          }
        if (did_triple)
          {
             last_time = 0;
             last_last_time = 0;
          }
        else
          {
             last_last_time = last_time;
             last_time = t;
          }
        retry:
        prev_x = x;
        prev_y = y;
        prev_button = button;
     }
   while (v > 0);
   return EINA_TRUE;
}
/**
 * @defgroup Ecore_FB_Click_Group Framebuffer Double Click Functions
 *
 * Functions that deal with the double click time of the framebuffer.
 */

/**
 * Sets the timeout for a double and triple clicks to be flagged.
 *
 * This sets the time between clicks before the double_click flag is
 * set in a button down event. If 3 clicks occur within double this
 * time, the triple_click flag is also set.
 *
 * @param   t The time in seconds
 * @ingroup Ecore_FB_Click_Group
 */
EAPI void
ecore_fb_double_click_time_set(double t)
{
   if (t < 0.0) t = 0.0;
   _ecore_fb_double_click_time = t;
}

/**
 * Retrieves the double and triple click flag timeout.
 *
 * See @ref ecore_x_double_click_time_set for more information.
 *
 * @return  The timeout for double clicks in seconds.
 * @ingroup Ecore_FB_Click_Group
 */
EAPI double
ecore_fb_double_click_time_get(void)
{
   return _ecore_fb_double_click_time;
}