uwac-tools.c

/*
 * Copyright © 2015 David FORT <contact@hardening-consulting.com>
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting documentation, and
 * that the name of the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */
 
#include <wayland-util.h>
#include <string.h>
#include <uwac/uwac-tools.h>
 
struct uwac_touch_automata
{
  struct wl_array tp;
};
 
void UwacTouchAutomataInit(UwacTouchAutomata* automata)
{
  wl_array_init(&automata->tp);
}
 
void UwacTouchAutomataReset(UwacTouchAutomata* automata)
{
  automata->tp.size = 0;
}
 
bool UwacTouchAutomataInjectEvent(UwacTouchAutomata* automata, UwacEvent* event)
{
 
  UwacTouchPoint* tp = NULL;
 
  switch (event->type)
  {
    case UWAC_EVENT_TOUCH_FRAME_BEGIN:
      break;
 
    case UWAC_EVENT_TOUCH_UP:
    {
      UwacTouchUp* touchUp = &event->touchUp;
      size_t toMove = automata->tp.size - sizeof(UwacTouchPoint);
 
      wl_array_for_each(tp, &automata->tp)
      {
        if ((int64_t)tp->id == touchUp->id)
        {
          if (toMove)
            memmove(tp, tp + 1, toMove);
          return true;
        }
 
        toMove -= sizeof(UwacTouchPoint);
      }
      break;
    }
 
    case UWAC_EVENT_TOUCH_DOWN:
    {
      UwacTouchDown* touchDown = &event->touchDown;
 
      wl_array_for_each(tp, &automata->tp)
      {
        if ((int64_t)tp->id == touchDown->id)
        {
          tp->x = touchDown->x;
          tp->y = touchDown->y;
          return true;
        }
      }
 
      tp = wl_array_add(&automata->tp, sizeof(UwacTouchPoint));
      if (!tp)
        return false;
 
      if (touchDown->id < 0)
        return false;
 
      tp->id = (uint32_t)touchDown->id;
      tp->x = touchDown->x;
      tp->y = touchDown->y;
      break;
    }
 
    case UWAC_EVENT_TOUCH_FRAME_END:
      break;
 
    default:
      break;
  }
 
  return true;
}