/*

    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"

/*

 *	Atari keyboard events manager, using BIOS

 *

 *	Patrice Mandin

 */

/* Mint includes */

#include <mint/osbind.h>

#include <mint/cookie.h>

#include "../../events/SDL_sysevents.h"

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

#include "SDL_atarikeys.h"

#include "SDL_atarievents_c.h"

#include "SDL_xbiosevents_c.h"

#include "SDL_ataridevmouse_c.h"

/* To save state of keyboard */

#define ATARIBIOS_MAXKEYS 128

static unsigned char bios_currentkeyboard[ATARIBIOS_MAXKEYS];

static unsigned char bios_previouskeyboard[ATARIBIOS_MAXKEYS];

static unsigned char bios_currentascii[ATARIBIOS_MAXKEYS];

static SDL_bool use_dev_mouse = SDL_FALSE;

/* Special keys state */

enum

{

    K_RSHIFT = 0,

    K_LSHIFT,

    K_CTRL,

    K_ALT,

    K_CAPSLOCK,

    K_CLRHOME,

    K_INSERT

};

/* The translation tables from a console scancode to a SDL keysym */

static SDLKey keymap[ATARIBIOS_MAXKEYS];

static SDL_keysym *TranslateKey(int scancode, int asciicode,

                                SDL_keysym * keysym, SDL_bool pressed);

static void UpdateSpecialKeys(int special_keys_state);

void

AtariBios_InitOSKeymap(_THIS)

{

    int i, vectors_mask;

    unsigned long dummy;

    SDL_memset(bios_currentkeyboard, 0, sizeof(bios_currentkeyboard));

    SDL_memset(bios_previouskeyboard, 0, sizeof(bios_previouskeyboard));

    /* Initialize keymap */

        keymap[i] = SDLK_UNKNOWN;

    /* Functions keys */

    for (i = 0; i < 10; i++)

        keymap[SCANCODE_F1 + i] = SDLK_F1 + i;

    /* Cursor keypad */

    keymap[SCANCODE_HELP] = SDLK_HELP;

    keymap[SCANCODE_UNDO] = SDLK_UNDO;

    keymap[SCANCODE_INSERT] = SDLK_INSERT;

    keymap[SCANCODE_CLRHOME] = SDLK_HOME;

    keymap[SCANCODE_UP] = SDLK_UP;

    keymap[SCANCODE_DOWN] = SDLK_DOWN;

    keymap[SCANCODE_RIGHT] = SDLK_RIGHT;

    keymap[SCANCODE_LEFT] = SDLK_LEFT;

    /* Special keys */

    keymap[SCANCODE_ESCAPE] = SDLK_ESCAPE;

    keymap[SCANCODE_BACKSPACE] = SDLK_BACKSPACE;

    keymap[SCANCODE_TAB] = SDLK_TAB;

    keymap[SCANCODE_ENTER] = SDLK_RETURN;

    keymap[SCANCODE_DELETE] = SDLK_DELETE;

    keymap[SCANCODE_LEFTCONTROL] = SDLK_LCTRL;

    keymap[SCANCODE_LEFTSHIFT] = SDLK_LSHIFT;

    keymap[SCANCODE_RIGHTSHIFT] = SDLK_RSHIFT;

    keymap[SCANCODE_LEFTALT] = SDLK_LALT;

    keymap[SCANCODE_CAPSLOCK] = SDLK_CAPSLOCK;

    use_dev_mouse = (SDL_AtariDevMouse_Open() != 0) ? SDL_TRUE : SDL_FALSE;

    vectors_mask = ATARI_XBIOS_JOYSTICKEVENTS;  /* XBIOS joystick events */

    if (!use_dev_mouse) {

        vectors_mask |= ATARI_XBIOS_MOUSEEVENTS;        /* XBIOS mouse events */

    }

    if (Getcookie(C_MiNT, &dummy) == C_FOUND) {

        vectors_mask = 0;

    }

    SDL_AtariXbios_InstallVectors(vectors_mask);

}

void

AtariBios_PumpEvents(_THIS)

{

    int i;

    SDL_keysym keysym;

    /* Update pressed keys */

    SDL_memset(bios_currentkeyboard, 0, ATARIBIOS_MAXKEYS);

    while (Bconstat(_CON)) {

        unsigned long key_pressed;

        unsigned char asciicode, scancode;

        key_pressed = Bconin(_CON);

        asciicode = key_pressed;

        scancode = key_pressed >> 16;

        bios_currentkeyboard[scancode] = 0xFF;

        bios_currentascii[scancode] = asciicode;

    }

    /* Read special keys */

    UpdateSpecialKeys(Kbshift(-1));

    /* Now generate events */

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

        /* Key pressed ? */

        if (bios_currentkeyboard[i] && !bios_previouskeyboard[i])

            SDL_PrivateKeyboard(SDL_PRESSED,

                                TranslateKey(i, bios_currentascii[i],

                                             &keysym, SDL_TRUE));

        /* Key unpressed ? */

        if (bios_previouskeyboard[i] && !bios_currentkeyboard[i])

            SDL_PrivateKeyboard(SDL_RELEASED,

                                TranslateKey(i, bios_currentascii[i],

                                             &keysym, SDL_FALSE));

    }

    if (use_dev_mouse) {

        SDL_AtariDevMouse_PostMouseEvents(this, SDL_TRUE);

    } else {

        SDL_AtariXbios_PostMouseEvents(this, SDL_TRUE);

    }

    /* Will be previous table */

    SDL_memcpy(bios_previouskeyboard, bios_currentkeyboard,

               ATARIBIOS_MAXKEYS);

}

static void

UpdateSpecialKeys(int special_keys_state)

{

#define UPDATE_SPECIAL_KEYS(numbit,scancode) \

	{	\

		if (special_keys_state & (1<<(numbit))) { \

			bios_currentkeyboard[scancode]=0xFF; \

			bios_currentascii[scancode]=0; \

		}	\

	}

    UPDATE_SPECIAL_KEYS(K_RSHIFT, SCANCODE_RIGHTSHIFT);

    UPDATE_SPECIAL_KEYS(K_LSHIFT, SCANCODE_LEFTSHIFT);

    UPDATE_SPECIAL_KEYS(K_CTRL, SCANCODE_LEFTCONTROL);

    UPDATE_SPECIAL_KEYS(K_ALT, SCANCODE_LEFTALT);

    UPDATE_SPECIAL_KEYS(K_CAPSLOCK, SCANCODE_CAPSLOCK);

}

static SDL_keysym *

TranslateKey(int scancode, int asciicode, SDL_keysym * keysym,

             SDL_bool pressed)

{

    /* Set the keysym information */

    keysym->scancode = scancode;

    if (asciicode)

        keysym->sym = asciicode;

    else

        keysym->sym = keymap[scancode];

    keysym->mod = KMOD_NONE;

    keysym->unicode = 0;

    if (SDL_TranslateUNICODE && pressed) {

        keysym->unicode = SDL_AtariToUnicodeTable[asciicode];

    }

    return (keysym);

}

void

AtariBios_ShutdownEvents(void)

{

    SDL_AtariXbios_RestoreVectors();

    if (use_dev_mouse) {

        SDL_AtariDevMouse_Close();

    }

}

/* vi: set ts=4 sw=4 expandtab: */