/*****************************************************************************
 *
 * grail - Gesture Recognition And Instantiation Library
 *
 * Copyright (C) 2010 Canonical Ltd.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authors:
 *      Henrik Rydberg <rydberg@bitmath.org>
 *
 ****************************************************************************/

#include <grail.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>

static int tp_get_clients(int x, int y, int screen,
			  grail_clientid_t *clients, int nclients)
{
	return 0;
}

static void tp_event(struct grail *ge, const struct input_event *ev)
{
	fprintf(stderr, "event %d %d %d\n", ev->type, ev->code, ev->value);
}

static void tp_gesture(struct grail *ge, const struct grail_event *ev)
{
	fprintf(stderr, "gesture %d %d\n", ev->type, ev->id);
}

static void loop_device(struct grail *ge, int fd)
{
	while (!grail_idle(ge, fd, 5000))
		grail_pull(ge, fd);
}

#if 0
void grail_add_client(struct grail *ge, grail_clientid_t id,
		      const int *types, const int *priority, int ntypes);
void grail_remove_client(struct grail *ge, grail_clientid_t id);

#endif


int main(int argc, char *argv[])
{
	struct grail ge;
	int fd;

	if (argc < 2) {
		fprintf(stderr, "Usage: %s <device>\n", argv[0]);
		return -1;
	}

	memset(&ge, 0, sizeof(ge));
	ge.get_clients = tp_get_clients;
	ge.event = tp_event;
	ge.gesture = tp_gesture;

	fd = open(argv[1], O_RDONLY | O_NONBLOCK);
	if (fd < 0) {
		fprintf(stderr, "error: could not open device\n");
		return -1;
	}
	if (ioctl(fd, EVIOCGRAB, 1)) {
		fprintf(stderr, "error: could not grab the device\n");
		return -1;
	}

	if (grail_open(&ge, fd)) {
		fprintf(stderr, "error: could not open touch device\n");
		return -1;
	}
	loop_device(&ge, fd);
	grail_close(&ge, fd);

	ioctl(fd, EVIOCGRAB, 0);
	close(fd);
	return 0;
}