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/* Copyright (c) 1992, 1999, 2001 John E. Davis
* This file is part of the S-Lang library.
*
* You may distribute under the terms of either the GNU General Public
* License or the Perl Artistic License.
*/
#include "slinclud.h"
#include "slang.h"
#include "_slang.h"
unsigned int SLang_Input_Buffer_Len = 0;
unsigned char SLang_Input_Buffer [SL_MAX_INPUT_BUFFER_LEN];
int SLang_Abort_Char = 7;
int SLang_Ignore_User_Abort = 0;
/* This has the effect of mapping all characters in the range 128-169 to
* ESC [ something
*/
unsigned int SLang_getkey (void)
{
unsigned int imax;
unsigned int ch;
if (SLang_Input_Buffer_Len)
{
ch = (unsigned int) *SLang_Input_Buffer;
SLang_Input_Buffer_Len--;
imax = SLang_Input_Buffer_Len;
SLMEMCPY ((char *) SLang_Input_Buffer,
(char *) (SLang_Input_Buffer + 1), imax);
}
else if (SLANG_GETKEY_ERROR == (ch = _SLsys_getkey ())) return ch;
#if _SLANG_MAP_VTXXX_8BIT
# if !defined(IBMPC_SYSTEM)
if (ch & 0x80)
{
unsigned char i;
i = (unsigned char) (ch & 0x7F);
if (i < ' ')
{
i += 64;
SLang_ungetkey (i);
ch = 27;
}
}
# endif
#endif
return(ch);
}
int SLang_ungetkey_string (unsigned char *s, unsigned int n)
{
register unsigned char *bmax, *b, *b1;
if (SLang_Input_Buffer_Len + n + 3 > SL_MAX_INPUT_BUFFER_LEN)
return -1;
b = SLang_Input_Buffer;
bmax = (b - 1) + SLang_Input_Buffer_Len;
b1 = bmax + n;
while (bmax >= b) *b1-- = *bmax--;
bmax = b + n;
while (b < bmax) *b++ = *s++;
SLang_Input_Buffer_Len += n;
return 0;
}
int SLang_buffer_keystring (unsigned char *s, unsigned int n)
{
if (n + SLang_Input_Buffer_Len + 3 > SL_MAX_INPUT_BUFFER_LEN) return -1;
SLMEMCPY ((char *) SLang_Input_Buffer + SLang_Input_Buffer_Len,
(char *) s, n);
SLang_Input_Buffer_Len += n;
return 0;
}
int SLang_ungetkey (unsigned char ch)
{
return SLang_ungetkey_string(&ch, 1);
}
int SLang_input_pending (int tsecs)
{
int n;
unsigned char c;
if (SLang_Input_Buffer_Len) return (int) SLang_Input_Buffer_Len;
n = _SLsys_input_pending (tsecs);
if (n <= 0) return 0;
c = (unsigned char) SLang_getkey ();
SLang_ungetkey_string (&c, 1);
return n;
}
void SLang_flush_input (void)
{
int quit = SLKeyBoard_Quit;
SLang_Input_Buffer_Len = 0;
SLKeyBoard_Quit = 0;
while (_SLsys_input_pending (0) > 0)
{
(void) _SLsys_getkey ();
/* Set this to 0 because _SLsys_getkey may stuff keyboard buffer if
* key sends key sequence (OS/2, DOS, maybe VMS).
*/
SLang_Input_Buffer_Len = 0;
}
SLKeyBoard_Quit = quit;
}
#ifdef IBMPC_SYSTEM
static int Map_To_ANSI;
int SLgetkey_map_to_ansi (int enable)
{
Map_To_ANSI = enable;
return 0;
}
static int convert_scancode (unsigned int scan,
unsigned int shift,
int getkey,
unsigned int *ret_key)
{
unsigned char buf[16];
unsigned char *b;
unsigned char end;
int is_arrow;
shift &= (_SLTT_KEY_ALT|_SLTT_KEY_SHIFT|_SLTT_KEY_CTRL);
b = buf;
if (_SLTT_KEY_ALT == shift)
{
shift = 0;
*b++ = 27;
}
*b++ = 27;
*b++ = '[';
is_arrow = 0;
end = '~';
if (shift)
{
if (shift == _SLTT_KEY_CTRL)
end = '^';
else if (shift == _SLTT_KEY_SHIFT)
end = '$';
else shift = 0;
}
/* These mappings correspond to what rxvt produces under Linux */
switch (scan & 0xFF)
{
default:
return -1;
case 0x47: /* home */
*b++ = '1';
break;
case 0x48: /* up */
end = 'A';
is_arrow = 1;
break;
case 0x49: /* PgUp */
*b++ = '5';
break;
case 0x4B: /* Left */
end = 'D';
is_arrow = 1;
break;
case 0x4D: /* Right */
end = 'C';
is_arrow = 1;
break;
case 0x4F: /* End */
*b++ = '4';
break;
case 0x50: /* Down */
end = 'B';
is_arrow = 1;
break;
case 0x51: /* PgDn */
*b++ = '6';
break;
case 0x52: /* Insert */
*b++ = '2';
break;
case 0x53: /* Delete */
*b++ = '3';
break;
case ';': /* F1 */
*b++ = '1';
*b++ = '1';
break;
case '<': /* F2 */
*b++ = '1';
*b++ = '2';
break;
case '=': /* F3 */
*b++ = '1';
*b++ = '3';
break;
case '>': /* F4 */
*b++ = '1';
*b++ = '4';
break;
case '?': /* F5 */
*b++ = '1';
*b++ = '5';
break;
case '@': /* F6 */
*b++ = '1';
*b++ = '7';
break;
case 'A': /* F7 */
*b++ = '1';
*b++ = '8';
break;
case 'B': /* F8 */
*b++ = '1';
*b++ = '9';
break;
case 'C': /* F9 */
*b++ = '2';
*b++ = '0';
break;
case 'D': /* F10 */
*b++ = '2';
*b++ = '1';
break;
case 0x57: /* F11 */
*b++ = '2';
*b++ = '3';
break;
case 0x58: /* F12 */
*b++ = '2';
*b++ = '4';
break;
}
if (is_arrow && shift)
{
if (shift == _SLTT_KEY_CTRL)
end &= 0x1F;
else
end |= 0x20;
}
*b++ = end;
if (getkey)
{
(void) SLang_buffer_keystring (buf + 1, (unsigned int) (b - (buf + 1)));
*ret_key = buf[0];
return 0;
}
(void) SLang_buffer_keystring (buf, (unsigned int) (b - buf));
return 0;
}
unsigned int _SLpc_convert_scancode (unsigned int scan,
unsigned int shift,
int getkey)
{
unsigned char buf[16];
if (Map_To_ANSI)
{
if (0 == convert_scancode (scan, shift, getkey, &scan))
return scan;
}
if (getkey)
{
buf[0] = scan & 0xFF;
SLang_buffer_keystring (buf, 1);
return (scan >> 8) & 0xFF;
}
buf[0] = (scan >> 8) & 0xFF;
buf[1] = scan & 0xFF;
(void) SLang_buffer_keystring (buf, 2);
return 0;
}
#endif
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