/*****************************************************************************
 *
 * 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 <gesture-dev.h>
#include <gesture-buffer.h>
#include <malloc.h>
#include <string.h>
#include <errno.h>

#define DIM_CLIENT 32

struct gedev_impl {
	int nclient;
	struct gesture_client *client[DIM_CLIENT];
};

int gedev_init(struct gesture_dev *dev, void *priv)
{
	struct gedev_impl *x;
	x = calloc(1, sizeof(*x));
	if (!x)
		return -ENOMEM;
	dev->impl = x;
	dev->priv = priv;
	return 0;
}

int gedev_attach_client(struct gesture_dev *dev,
			 struct gesture_client *client)
{
	struct gedev_impl *x = dev->impl;
	if (x->nclient >= DIM_CLIENT)
		return -ENOMEM;
	x->client[x->nclient++] = client;
	return 0;
}

void gedev_flag(struct gesture_dev *dev,
		const struct gesture_flag *flag)
{
	struct gedev_impl *x = dev->impl;
	int i;
	for (i = 0; i < x->nclient; i++)
		client_flag(x->client[i], flag);
}

void gedev_event(struct gesture_dev *dev,
		 const struct gesture_event *ev)
{
	struct gedev_impl *x = dev->impl;
	int i;
	for (i = 0; i < x->nclient; i++)
		client_event(x->client[i], ev);
}

void gedev_sync(struct gesture_dev *dev)
{
	struct gedev_impl *x = dev->impl;
	int i;
	for (i = 0; i < x->nclient; i++)
		client_sync(x->client[i]);
}

void gedev_detach_client(struct gesture_dev *dev,
			 struct gesture_client *client)
{
	struct gedev_impl *x = dev->impl;
	int i, j;
	for (i = 0; i < x->nclient; i++)
		if (x->client[i] == client)
			break;
	if (i >= x->nclient)
		return;
	x->nclient--;
	for (j = i; j < x->nclient; j++)
		x->client[j] = x->client[j + 1];
	for (j = x->nclient; j < DIM_CLIENT; j++)
		x->client[j] = 0;
}

void gedev_destroy(struct gesture_dev *dev)
{
	free(dev->impl);
	memset(dev, 0, sizeof(*dev));
}