/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Lesser General Public

    License as published by the Free Software Foundation; either

    version 2.1 of the License, or (at your option) any later version.

    This library 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

    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public

    License along with this library; if not, write to the Free Software

    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga

    slouken@libsdl.org

*/

#include "SDL_config.h"

/*

	MiNT /dev/mouse driver

	Patrice Mandin

*/

#include <fcntl.h>

#include <unistd.h>

#include "../../events/SDL_events_c.h"

#include "SDL_ataridevmouse_c.h"

/* Defines */

#define DEVICE_NAME	"/dev/mouse"

/* Local variables */

static int handle = -1;

static int mouseb, prev_mouseb;

/* Functions */

int SDL_AtariDevMouse_Open(void)

{

	int r;

	const char *mousedev;

	/*

		TODO: Fix the MiNT device driver, that locks mouse for other

		applications, so this is disabled till fixed

	 */

	return 0;

	/* First, try SDL_MOUSEDEV device */

	mousedev = SDL_getenv("SDL_MOUSEDEV");

	if (!mousedev) {

		handle = open(mousedev, 0);

	}

	/* Failed, try default device */

	if (handle<0) {

		handle = open(DEVICE_NAME, 0);

	}

	if (handle<0) {

		handle = -1;

		return 0;

	}

	/* Set non blocking mode */

	r = fcntl(handle, F_GETFL, 0);

	if (r<0) {

		close(handle);

		handle = -1;

		return 0;

	}

	r |= O_NDELAY;

	r = fcntl(handle, F_SETFL, r);

	if (r<0) {

		close(handle);

		handle = -1;

		return 0;

	}

	prev_mouseb = 7;

	return 1;

}

void SDL_AtariDevMouse_Close(void)

{

	if (handle>0) {

		close(handle);

		handle = -1;

	}

}

static int atari_GetButton(int button)

{

	switch(button)

	{

		case 0:

			return SDL_BUTTON_RIGHT;

		case 1:

			return SDL_BUTTON_MIDDLE;

		default:

			break;

	}

	return SDL_BUTTON_LEFT;

}

void SDL_AtariDevMouse_PostMouseEvents(_THIS, SDL_bool buttonEvents)

{

	unsigned char buffer[3];

	int mousex, mousey;

	if (handle<0) {

		return;

	}

	mousex = mousey = 0;

	while (read(handle, buffer, sizeof(buffer))==sizeof(buffer)) {

		mouseb = buffer[0] & 7;

		mousex += (char) buffer[1];

		mousey += (char) buffer[2];

		/* Mouse button events */

		if (buttonEvents && (mouseb != prev_mouseb)) {

			int i;

			for (i=0;i<3;i++) {

				int curbutton, prevbutton;

				curbutton = mouseb & (1<<i);

				prevbutton = prev_mouseb & (1<<i);

				if (curbutton && !prevbutton) {

					SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);

				}

				if (!curbutton && prevbutton) {

					SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);

				}

			}

			prev_mouseb = mouseb;

		}

	}

	/* Mouse motion event */

	if (mousex || mousey) {

		SDL_PrivateMouseMotion(0, 1, mousex, -mousey);

	}

}