/*****************************************************************************
 *
 * utouch-frame - Touch Frame Library
 *
 * Copyright (C) 2010-2011 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>
 *
 ****************************************************************************/

#define MTDEV_NO_LEGACY_API

#include <utouch/frame-xi2.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include "common-defs.h"

static int opcode;

struct frame_test {
	Display *display;
	Window root, win;
	XIDeviceInfo *info, *dev;
	utouch_frame_handle fh;
};

static int init_xi2(struct frame_test *test, int id)
{
	Display *dpy;
	int ndevices, i;
	int event, error;

	dpy = XOpenDisplay(NULL);
	if (!dpy)
		return -1;

	if (!XQueryExtension(dpy, "XInputExtension", &opcode, &event, &error))
		return -1;

	test->display = dpy;
	test->info = XIQueryDevice(dpy, XIAllDevices, &ndevices);
	test->dev = 0;
	for (i = 0; i < ndevices; i++)
		if (test->info[i].deviceid == id)
			test->dev = &test->info[i];
	if (!test->dev)
		return -1;

	test->root = DefaultRootWindow(dpy);
	test->win = XCreateSimpleWindow(dpy, test->root,
					0, 0, 400, 400, 0,
					BlackPixel(dpy, 0),
					WhitePixel(dpy, 0));

	XMapWindow(test->display, test->win);
	XFlush(test->display);

	return 0;
}

static int init_frame(struct frame_test *test)
{
	test->fh = utouch_frame_new_engine(100, 32, 100);
	if (!test->fh)
		return -1;
	return utouch_frame_init_xi2(test->fh, test->display, test->dev);
}

static void destroy_all(struct frame_test *test)
{
	utouch_frame_delete_engine(test->fh);
	XIFreeDeviceInfo(test->info);
	XDestroyWindow(test->display, test->win);
	XCloseDisplay(test->display);
	memset(test, 0, sizeof(*test));
}

static void handle_event(struct frame_test *test, XEvent *ev)
{
	XGenericEventCookie *gev = &ev->xcookie;
	const struct utouch_frame *frame;
	XConfigureEvent *cev;
	XIDeviceEvent *dev;

	switch(ev->type) {
	case ConfigureNotify:
		cev = (XConfigureEvent *)ev;
		if (cev->window == XDefaultRootWindow(cev->display))
			utouch_frame_configure_xi2(test->fh, cev);
		break;
	case GenericEvent:
		if (!XGetEventData(test->display, gev))
			break;
		dev = gev->data;
		/* null for some requests, quite odd */
		dev->display = ev->xany.display;
		if (gev->type == GenericEvent && gev->extension == opcode) {
			frame = utouch_frame_pump_xi2(test->fh, dev);
			if (frame)
				report_frame(frame);
		}
		XFreeEventData(test->display, gev);
		break;
	}
}

static void loop_device(struct frame_test *test)
{
	XIEventMask mask;

	mask.deviceid = XIAllDevices;
	mask.mask_len = XIMaskLen(XI_TouchMotion);
	mask.mask = calloc(mask.mask_len, sizeof(char));

	XISetMask(mask.mask, XI_TouchBegin);
	XISetMask(mask.mask, XI_TouchMotion);
	XISetMask(mask.mask, XI_TouchEnd);
	XISetMask(mask.mask, XI_PropertyEvent);
	XISelectEvents(test->display, test->win, &mask, 1);

	XSelectInput(test->display, test->root, StructureNotifyMask);

	while (1) {
		XEvent ev;
		XNextEvent(test->display, &ev);
		handle_event(test, &ev);
	}
}

int main(int argc, char *argv[])
{
	struct frame_test test;
	int id;

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

	if (init_xi2(&test, id)) {
		fprintf(stderr, "error: could not describe device\n");
		return -1;
	}
	if (!utouch_frame_is_supported_xi2(test.display, test.dev)) {
		fprintf(stderr, "error: unsupported device\n");
		return -1;
	}
	if (init_frame(&test)) {
		fprintf(stderr, "error: could not init frame\n");
		return -1;
	}

	report_device_caps(test.fh);

	loop_device(&test);

	destroy_all(&test);
	return 0;
}