/*

     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 */

     for (i = 0; i < sizeof(keymap); i++)

         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: */