/*
 * $Id$
 */

/*
 * Harbour Project source code:
 * Video subsystem based on ncurses screen library.
 *
 * Copyright 2005 Przemyslaw Czerpak <druzus @polbox.com>
 * www - http://www.harbour-project.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 2, 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 software; see the file COPYING.   If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
 *
 * As a special exception, the Harbour Project gives permission for
 * additional uses of the text contained in its release of Harbour.
 *
 * The exception is that, if you link the Harbour libraries with other
 * files to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the Harbour library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the Harbour
 * Project under the name Harbour.  If you copy code from other
 * Harbour Project or Free Software Foundation releases into a copy of
 * Harbour, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.   To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for Harbour, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.
 *
 */

/* NOTE: User programs should never call this layer directly! */

/* *********************************************************************** */

#define HB_GT_NAME      CRS

#include "hbgtcore.h"
#include "hbinit.h"
#include "hbapiitm.h"
#include "hbapierr.h"

#ifndef HB_CDP_SUPPORT_OFF
#include "hbapicdp.h"
#endif

#ifdef HB_NCURSES_194
#  include <ncur194/curses.h>
   extern int tigetflag(char *);
   extern int tigetnum(char *);
   extern char *tigetstr(char *);
#else
#  if defined( HB_OS_HPUX )
#     define _XOPEN_SOURCE_EXTENDED
#  endif
#  include <curses.h>
#  if defined( HB_OS_SUNOS )
#     include <term.h>
#  endif
#endif
#ifdef HAVE_GPM_H
# include <gpm.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/ioctl.h>
#include <signal.h>
#include <errno.h>
#include <unistd.h>
#include <termios.h>
#include <fcntl.h>
#include <time.h>
#if ( defined( HB_OS_LINUX ) || defined( HB_OS_BSD ) ) && !defined(__WATCOMC__)
# if defined( HB_OS_LINUX )
#  include <pty.h>  /* for openpty and forkpty */
# elif defined( HB_OS_DARWIN ) || defined( __NetBSD__ ) || defined( __OpenBSD__ )
#  include <util.h> /* for openpty and forkpty */
#  if defined( __NetBSD__ )
#   include <termcap.h>
#   define tigetnum(id)       tgetnum(id)
#   define tigetstr(id)       tgetstr(id,NULL)
#  endif
# elif defined( HB_OS_BSD )
#  include <libutil.h> /* for openpty and forkpty */
# endif
# include <utmp.h> /* for login_tty */
#endif

#ifndef O_ACCMODE
#  define O_ACCMODE           ( O_RDONLY | O_WRONLY | O_RDWR )
#endif

#ifndef _POSIX_PATH_MAX
#  define _POSIX_PATH_MAX     256
#endif

/* #define HB_GT_CRS_TTYHACK */

#define MAX_SIGNO       64

#define BASE_INFD       0
#define BASE_OUTFD      1
#define BASE_ERRFD      2
#define MAXFD           1024


#define ESC_DELAY       25
/* #define DBLCLK_DELAY 168 */
#define DBLCLK_DELAY    hb_mouseGetDoubleClickSpeed()

#define MAX_IOBASE      32
#define STDIN_BUFLEN    128

#define TERM_LINUX      1
#define TERM_XTERM      2

#define IS_EVTFDSTAT(x) ((x) >= 0x01 && (x) <= 0x03)
#define EVTFDSTAT_RUN   0x01
#define EVTFDSTAT_STOP  0x02
#define EVTFDSTAT_DEL   0x03

#define CTRL_SEQ        "\036"
#define ALT_SEQ         "\037"
/*#define NATION_SEQ      "\016"*/

#define MOUSE_NONE      0
#define MOUSE_GPM       1
#define MOUSE_XTERM     2

#define K_UNDEF         0x10000
#define K_METAALT       0x10001
#define K_METACTRL      0x10002
#define K_NATIONAL      0x10003
#define K_MOUSETERM     0x10004
#define K_RESIZE        0x10005
#define K_PRTSCR        0x10006
#define K_PAUSE         0x10007

#ifndef SC_UNDEF
#  define SC_UNDEF      -1
#endif

#define KEY_ALTMASK     0x10000000
#define KEY_CTRLMASK    0x20000000
#define KEY_EXTDMASK    0x40000000
#define KEY_CLIPMASK    0x80000000
#define KEY_MASK        0xF0000000

#define CLR_KEYMASK(x)  ((x) & ~KEY_MASK)
#define GET_KEYMASK(x)  ((x) & KEY_MASK)

#define IS_CLIPKEY(x)   ((((x) & ~0xffff) ^ KEY_CLIPMASK) == 0)
#define SET_CLIPKEY(x)  (((x) & 0xffff) | KEY_CLIPMASK)
#define GET_CLIPKEY(x)  ((((x) & 0x8000) ? ~0xffff : 0) | ((x) & 0xffff))

#define NO_STDKEYS      96
#define NO_EXTDKEYS     30

#define EXKEY_F1        ( 0 | KEY_EXTDMASK)
#define EXKEY_F2        ( 1 | KEY_EXTDMASK)
#define EXKEY_F3        ( 2 | KEY_EXTDMASK)
#define EXKEY_F4        ( 3 | KEY_EXTDMASK)
#define EXKEY_F5        ( 4 | KEY_EXTDMASK)
#define EXKEY_F6        ( 5 | KEY_EXTDMASK)
#define EXKEY_F7        ( 6 | KEY_EXTDMASK)
#define EXKEY_F8        ( 7 | KEY_EXTDMASK)
#define EXKEY_F9        ( 8 | KEY_EXTDMASK)
#define EXKEY_F10       ( 9 | KEY_EXTDMASK)
#define EXKEY_F11       (10 | KEY_EXTDMASK)
#define EXKEY_F12       (11 | KEY_EXTDMASK)
#define EXKEY_UP        (12 | KEY_EXTDMASK)
#define EXKEY_DOWN      (13 | KEY_EXTDMASK)
#define EXKEY_LEFT      (14 | KEY_EXTDMASK)
#define EXKEY_RIGHT     (15 | KEY_EXTDMASK)
#define EXKEY_INS       (16 | KEY_EXTDMASK)
#define EXKEY_DEL       (17 | KEY_EXTDMASK)
#define EXKEY_HOME      (18 | KEY_EXTDMASK)
#define EXKEY_END       (19 | KEY_EXTDMASK)
#define EXKEY_PGUP      (20 | KEY_EXTDMASK)
#define EXKEY_PGDN      (21 | KEY_EXTDMASK)
#define EXKEY_BS        (22 | KEY_EXTDMASK)
#define EXKEY_TAB       (23 | KEY_EXTDMASK)
#define EXKEY_ESC       (24 | KEY_EXTDMASK)
#define EXKEY_ENTER     (25 | KEY_EXTDMASK)
#define EXKEY_KPENTER   (26 | KEY_EXTDMASK)
#define EXKEY_CENTER    (27 | KEY_EXTDMASK)
#define EXKEY_PRTSCR    (28 | KEY_EXTDMASK)
#define EXKEY_PAUSE     (29 | KEY_EXTDMASK)

/* xHarbour compatible definitions */
#if !defined( K_SH_LEFT )
#define K_SH_LEFT           K_LEFT   /* Shift-Left  == Left  */
#define K_SH_UP             K_UP     /* Shift-Up    == Up    */
#define K_SH_RIGHT          K_RIGHT  /* Shift-Right == Right */
#define K_SH_DOWN           K_DOWN   /* Shift-Down  == Down  */
#define K_SH_INS            K_INS    /* Shift-Ins   == Ins   */
#define K_SH_DEL            K_DEL    /* Shift-Del   == Del   */
#define K_SH_HOME           K_HOME   /* Shift-Home  == Home  */
#define K_SH_END            K_END    /* Shift-End   == End   */
#define K_SH_PGUP           K_PGUP   /* Shift-PgUp  == PgUp  */
#define K_SH_PGDN           K_PGDN   /* Shift-PgDn  == PgDn  */
#define K_SH_RETURN         K_RETURN /* Shift-Enter == Enter */
#define K_SH_ENTER          K_ENTER  /* Shift-Enter == Enter */
#endif

/* mouse button states */
#define M_BUTTON_LEFT      0x0001
#define M_BUTTON_RIGHT     0x0002
#define M_BUTTON_MIDDLE    0x0004
#define M_BUTTON_LDBLCK    0x0010
#define M_BUTTON_RDBLCK    0x0020
#define M_BUTTON_MDBLCK    0x0040
#define M_BUTTON_WHEELUP   0x0100
#define M_BUTTON_WHEELDOWN 0x0200
#define M_CURSOR_MOVE      0x0400
#define M_BUTTON_KEYMASK   (M_BUTTON_LEFT | M_BUTTON_RIGHT | M_BUTTON_MIDDLE)
#define M_BUTTON_DBLMASK   (M_BUTTON_LDBLCK | M_BUTTON_RDBLCK | M_BUTTON_MDBLCK)

#define TIMEVAL_GET(tv)          gettimeofday(&(tv), NULL);
#define TIMEVAL_LESS(tv1, tv2)   (((tv1).tv_sec == (tv2).tv_sec ) ?     \
                                  ((tv1).tv_usec < (tv2).tv_usec) :     \
                                  ((tv1).tv_sec  < (tv2).tv_sec ))
#define TIMEVAL_ADD(dst, src, n) {                                      \
      (dst).tv_sec = (src).tv_sec + n / 1000;                           \
      if (((dst).tv_usec = (src).tv_usec+(n%1000)*1000)>=1000000) {     \
         (dst).tv_usec -= 1000000; (dst).tv_sec++;                      \
      } \
   }
