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/*****************************************************************************
*
* grail - Gesture Recognition And Instantiation Library
*
* Copyright (C) 2010 Canonical Ltd.
* Copyright (C) 2010 Henrik Rydberg <rydberg@bitmath.org>
*
* 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/>.
*
****************************************************************************/
#include "grail-inserter.h"
#include "grail-recognizer.h"
#include "grail-impl.h"
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <malloc.h>
#include <errno.h>
static void tp_event(struct touch_dev *dev,
const struct input_event *ev)
{
struct grail *ge = dev->priv;
struct grail_impl *x = ge->impl;
if (ev->type == EV_ABS) {
if (ev->code == ABS_X)
x->pointer_x = ev->value;
if (ev->code == ABS_Y)
x->pointer_y = ev->value;
return;
}
if (ev->type == EV_KEY) {
switch (ev->code) {
case BTN_TOUCH:
case BTN_TOOL_FINGER:
case BTN_TOOL_DOUBLETAP:
case BTN_TOOL_TRIPLETAP:
case BTN_TOOL_QUADTAP:
return;
}
}
evbuf_put(&x->evbuf, ev);
}
static int handle_abs_events(struct grail *ge,
const struct input_event *syn,
int pointer)
{
struct grail_impl *impl = ge->impl;
struct input_event ev = *syn;
int nevent = 0;
if (pointer != impl->pointer_status) {
ev.type = EV_KEY;
ev.code = BTN_TOUCH;
ev.value = pointer;
ge->event(ge, &ev);
impl->pointer_status = pointer;
nevent++;
}
if (pointer) {
ev.type = EV_ABS;
ev.code = ABS_X;
ev.value = impl->pointer_x;
ge->event(ge, &ev);
nevent++;
ev.type = EV_ABS;
ev.code = ABS_Y;
ev.value = impl->pointer_y;
ge->event(ge, &ev);
nevent++;
}
return nevent;
}
static int pointer_active(const struct grail *ge)
{
static const int fm_mask = 0x03;
const struct move_model *move = &ge->gru->move;
const struct tapping_model *tap = &ge->gru->tapping;
return move->single && ((move->active & fm_mask) || tap->active);
}
static void tp_sync(struct touch_dev *dev,
const struct input_event *syn)
{
struct input_event ev;
struct grail *ge = dev->priv;
struct grail_impl *impl = ge->impl;
struct gesture_inserter *gin = ge->gin;
struct touch_frame *frame = &dev->frame;
int pointer, used_move, nevent = 0;
gin_frame_begin(ge, frame);
gru_recognize(ge, frame);
gin_frame_end(ge, frame);
used_move = grail_mask_count(gin->types, sizeof(gin->types));
pointer = pointer_active(ge) && !used_move;
if (!ge->event) {
evbuf_clear(&impl->evbuf);
return;
}
if (!impl->filter_abs)
nevent += handle_abs_events(ge, syn, pointer);
while (!evbuf_empty(&impl->evbuf)) {
evbuf_get(&impl->evbuf, &ev);
ge->event(ge, &ev);
nevent++;
}
if (nevent)
ge->event(ge, syn);
}
void grail_filter_abs_events(struct grail *ge, int usage)
{
struct grail_impl *x = ge->impl;
x->filter_abs = usage;
}
int grail_open(struct grail *ge, int fd)
{
struct grail_impl *x;
int ret;
x = calloc(1, sizeof(*x));
if (!x)
return -ENOMEM;
ge->impl = x;
ret = touch_dev_open(&x->dev, fd);
if (ret)
goto freemem;
x->dev.event = tp_event;
x->dev.sync = tp_sync;
x->dev.priv = ge;
ret = gin_init(ge);
if (ret)
goto freedev;
ret = gru_init(ge);
if (ret)
goto freegin;
return 0;
freegin:
gin_destroy(ge);
freedev:
touch_dev_close(&x->dev, fd);
freemem:
free(x);
ge->impl = 0;
return ret;
}
void grail_close(struct grail *ge, int fd)
{
struct grail_impl *x = ge->impl;
void *status;
gru_destroy(ge);
gin_destroy(ge);
touch_dev_close(&x->dev, fd);
free(ge->impl);
ge->impl = 0;
}
int grail_idle(struct grail *ge, int fd, int ms)
{
struct grail_impl *x = ge->impl;
return touch_dev_idle(&x->dev, fd, ms);
}
int grail_pull(struct grail *ge, int fd)
{
struct grail_impl *x = ge->impl;
return touch_dev_pull(&x->dev, fd);
}
void grail_get_units(const struct grail *ge,
struct grail_coord *min, struct grail_coord *max)
{
const struct touch_caps *caps = &ge->impl->dev.caps;
min->x = caps->min_x;
min->y = caps->min_y;
max->x = caps->max_x;
max->y = caps->max_y;
}
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