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/*****************************************************************************
*
* 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 <malloc.h>
#include <string.h>
#include <errno.h>
#include "gebuf.h"
#define GESTURE_GAP (1000 * 60 * 60)
struct client_impl {
enum gesture_state state;
touch_time_t begin, end;
struct gebuf buf;
};
int client_init(struct gesture_client *client, void *priv)
{
struct client_impl *x;
memset(client, 0, sizeof(*client));
x = calloc(DIM_GESTURE_TYPE, sizeof(*x));
if (!x)
return -ENOMEM;
client->impl = x;
client->priv = priv;
return 0;
}
void client_flag(struct gesture_client *client,
const struct gesture_flag *flag)
{
if (client->priority[flag->type]) {
struct client_impl *x = &client->impl[flag->type];
switch(flag->state) {
case GS_BEGIN:
x->begin = flag->time;
x->end = flag->time + GESTURE_GAP;
break;
case GS_CANCEL:
x->end = x->begin;
break;
case GS_END:
x->end = flag->time;
break;
}
x->state = flag->state;
}
}
void client_event(struct gesture_client *client,
const struct gesture_event *ev)
{
if (client->priority[ev->type]) {
struct client_impl *x = &client->impl[ev->type];
gebuf_put(&x->buf, ev);
}
}
void client_sync(struct gesture_client *client)
{
struct gesture_event ev;
struct client_impl *x = client->impl;
int i, prio = 0;
for (i = 0; i < DIM_GESTURE_TYPE; i++) {
if (x[i].begin != x[i].end) {
if (client->priority[i] > prio)
prio = client->priority[i];
}
}
for (i = 0; i < DIM_GESTURE_TYPE; i++) {
if (client->priority[i] < prio) {
gebuf_clear(&x[i].buf);
} else if (prio && client->gesture) {
if (x[i].state == GS_END) {
while (!gebuf_empty(&x[i].buf)) {
gebuf_get(&x[i].buf, &ev);
client->gesture(client, &ev);
}
}
}
}
for (i = 0; i < DIM_GESTURE_TYPE; i++)
if (x[i].state == GS_END)
x[i].begin = x[i].end;
}
void client_destroy(struct gesture_client *client)
{
free(client->impl);
memset(client, 0, sizeof(*client));
}
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