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#include <atari.h>
#include <conio.h>
#include <string.h>
#include "addrs.h"
#include "screen.h"
#include "edbox.h"
#include "keyclick.h"
/* TODO: tab completion */
// static int edbox_visible = 0; /* don't think we'll ever need it */
static u16 edbox_pos; /* range 0 to EDBOX_SIZE - 1 */
static u16 edbox_len; /* idem */
void (*edbox_callback)(void);
static void hide_cursor(void) {
edit_box[edbox_pos] &= 0x7f;
}
static void show_cursor(void) {
edit_box[edbox_pos] |= 0x80;
}
void edbox_clear(void) {
memset(edit_box, 0, EDBOX_SIZE);
edbox_pos = edbox_len = 0;
show_cursor();
}
void edbox_show(void) {
u16 addr;
if(edbox_pos < 80)
addr = (u16)edit_box;
else
addr = (u16)edit_box + edbox_pos - 79;
scr_waitvcount(116);
*dlist_status_lms = addr;
show_cursor();
}
void edbox_hide(void) {
scr_refresh();
}
void edbox_putc(char c) {
if(!c)
return; /* no inserting nulls */
if((c != CH_EOL) && (edbox_pos == EDBOX_SIZE - 1))
return;
memmove(edit_box + edbox_pos + 1, edit_box + edbox_pos, EDBOX_SIZE - edbox_pos - 1);
edit_box[edbox_pos++] = c;
edbox_len++;
edbox_show();
}
void edbox_append(char *s) {
while(*s)
edit_box[edbox_pos++] = *s++;
edbox_len = edbox_pos;
}
void edbox_preset(char *s) {
edbox_clear();
edbox_append(s);
}
static char readline_done, readline_len;
static char *readline_dest;
static void readline_callback(void) {
strncpy(readline_dest, edit_box, readline_len);
readline_done = 1;
}
void edbox_readline(char *dest, char len) {
void (*old_callback)(void);
edbox_clear();
if(*dest)
edbox_preset(dest);
edbox_show();
old_callback = edbox_callback;
edbox_callback = readline_callback;
readline_dest = dest;
readline_len = len;
readline_done = 0;
while(!readline_done)
edbox_keystroke();
edbox_callback = old_callback;
}
static void special_keystroke(char c) {
keyclick();
OS.ch = 0xff;
edbox_putc(c);
}
static void del_char(void) {
if(!edbox_len) return;
memmove(edit_box + edbox_pos, edit_box + edbox_pos + 1, EDBOX_SIZE - edbox_pos - 1);
edbox_len--;
}
static void backspace(void) {
if(!edbox_pos) return;
edbox_pos--;
del_char();
}
static void del_word(void) {
if(!edbox_pos) return;
edbox_pos--;
while(edbox_pos && edit_box[edbox_pos] == ' ') {
del_char();
edbox_pos--;
}
while(edbox_pos && edit_box[edbox_pos] != ' ') {
del_char();
edbox_pos--;
}
if(!edbox_pos) edit_box[edbox_pos] = ' ';
}
static void normal_keystroke(void) {
char c;
c = cgetc();
switch(c) {
case CH_EOL:
hide_cursor();
if(edbox_callback)
(*edbox_callback)();
/* fall thru */
case CH_CLR:
edbox_hide();
/* fall thru */
case CH_DELLINE:
case 0x15: /* ^U */
edbox_clear();
break;
case CH_DEL:
backspace();
break;
case 0x17: /* ^W */
del_word();
break;
case CH_CURS_LEFT:
if(edbox_pos) edbox_pos--;
break;
case CH_CURS_RIGHT:
if(edbox_pos < edbox_len) edbox_pos++;
break;
case CH_DELCHR:
del_char();
break;
case 0x01: /* ^A */
edbox_pos = 0;
break;
case 0x05: /* ^E */
edbox_pos = edbox_len;
break;
default:
edbox_putc(c);
break;
}
}
void edbox_keystroke(void) {
char c;
while(OS.ch == 0xff)
;
edbox_show();
c = 0;
switch(OS.ch) {
case 0xa0: /* key: ctrl [ */
c = 0x7b; /* ascii: { */
break;
case 0xa2: /* key: ctrl ] */
c = 0x7d; /* ascii: } */
break;
case 0x1c: /* key: ESC */
c = 0x60; /* ascii: ` */
break;
case 0x5c: /* key: shift ESC */
case 0x9c: /* key: ctrl ESC */
c = 0x7e; /* ascii: ~ */
break;
case 0x3c: /* caps */
OS.shflok ^= 0x40;
keyclick();
break;
case 0x7c: /* shift-caps */
case 0xbc: /* ctrl-caps */
case 0x27: /* atari key */
case 0x67: /* ...w/shift */
case 0x97: /* ...w/ctrl */
case 0x9a: /* ctrl-3 (crash if cgetc() reads it!) */
return; /* ignore it! */
break;
default:
break;
}
hide_cursor();
if(c) {
special_keystroke(c);
} else {
normal_keystroke();
}
show_cursor();
}
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