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#include <atari.h>
#include <conio.h>
#include <string.h>
#include "addrs.h"
#include "screen.h"
#include "edbox.h"
#include "complete.h"
#include "keytab.h"
extern void __fastcall__ bell(void);
char *old_edbox[EDBOX_SIZE];
static u16 old_len;
static int typeover;
int edbox_visible = 0;
static u16 edbox_pos; /* range 0 to EDBOX_SIZE - 1 */
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(); // not needed? seems it is..
}
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;
*dlist_last_line = 0x02; /* ANTIC GR.0 */
edbox_visible = 1;
show_cursor();
}
void edbox_hide(void) {
scr_end_scrollback(); /* exit Start+E mode */
edbox_visible = 0;
scr_refresh();
}
/* note: c will never be an EOL.
idea: when the edbox is completely full (240 chars), go
ahead and pretend the user pressed Return (call edbox_callback,
etc). not sure if this is more or less annoying than just
refusing to accept more input until Return is pressed. */
void edbox_putc(char c) {
if(!c)
return; /* no inserting nulls */
if(!typeover)
memmove(edit_box + edbox_pos + 1, edit_box + edbox_pos, EDBOX_SIZE - edbox_pos - 1);
edit_box[edbox_pos] = c;
if(edbox_pos < EDBOX_SIZE - 1) {
edbox_pos++;
edbox_len++;
} else {
bell();
}
}
static void copy_to_old(void) {
if(!edbox_len) return;
memcpy(old_edbox, edit_box, edbox_len);
memset(old_edbox + edbox_len, 0, (EDBOX_SIZE - 1) - edbox_len);
old_len = edbox_len;
}
static void restore_old(void) {
edbox_clear();
hide_cursor();
memcpy(edit_box, old_edbox, old_len);
edbox_pos = edbox_len = old_len;
}
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 del_to_end(void) {
while(edbox_len > edbox_pos)
del_char();
}
static void backspace(void) {
if(!edbox_pos) return;
edbox_pos--;
del_char();
}
static void up(void) {
if(!edbox_len) {
restore_old();
} else {
if(edbox_pos > 39)
edbox_pos -= 40;
else
edbox_pos = 0;
}
}
static void down(void) {
if(edbox_pos > 199) return;
edbox_pos += 40;
if(edbox_pos > edbox_len)
edbox_pos = edbox_len;
}
static void word_left(char del) {
if(!edbox_pos) return;
if(!del) edbox_pos--;
while(edbox_pos && edit_box[edbox_pos] == ' ') {
if(del) del_char();
edbox_pos--;
}
while(edbox_pos && edit_box[edbox_pos] != ' ') {
if(del) del_char();
edbox_pos--;
}
// XXX: what's this good for?
if(del && !edbox_pos) edit_box[edbox_pos] = /* ' ' */ 0;
}
static void del_word(void) {
word_left(1);
}
static void back_word(void) {
word_left(0);
}
static void forward_word(void) {
while(edbox_pos < edbox_len && edit_box[edbox_pos] == ' ')
edbox_pos++;
while(edbox_pos < edbox_len && edit_box[edbox_pos] != ' ')
edbox_pos++;
}
static void del_to_start(void) {
while(edbox_pos) backspace();
}
void left(void) {
if(edbox_pos) edbox_pos--;
}
void right(void) {
if(edbox_pos < edbox_len) edbox_pos++;
}
void edbox_keystroke(char c) {
extern char start_latch;
extern void start_keystroke(char);
if(c == CH_ESC) {
start_latch = 1;
return;
}
if(c != XCH_TAB)
comp_complete_done();
if(c >= XCH_SCR1 && c <= XCH_SCR7) {
start_keystroke(c & 0x7f);
return;
} else if(c == XCH_ACTIVE) {
start_keystroke('a');
return;
}
edbox_show();
hide_cursor();
switch(c) {
case CH_EOL:
copy_to_old();
edbox_hide();
if(edbox_callback)
(*edbox_callback)();
edbox_clear();
break;
case XCH_TAB:
comp_complete();
break;
case XCH_UP:
up();
break;
case XCH_DOWN:
down();
break;
case XCH_LEFT:
left();
break;
case XCH_RIGHT:
right();
break;
case XCH_LWORD:
back_word();
break;
case XCH_RWORD:
forward_word();
break;
case XCH_CLS:
edbox_clear();
edbox_hide();
return;
case CH_DELCHR:
case 0x18: /* ^X */
del_char();
break;
case CH_DELLINE:
edbox_clear();
break;
case XCH_INSCHR:
typeover = !typeover;
break;
case 0x15: /* ^U */
del_to_start();
break;
case 0x0b: /* ^K */
del_to_end();
break;
case XCH_BS:
if(!edbox_len)
edbox_hide();
else
backspace();
break;
case 0x17: /* ^W */
del_word();
break;
case 0x01: /* ^A */
edbox_pos = 0;
break;
case 0x05: /* ^E */
edbox_pos = edbox_len;
break;
default:
edbox_putc(c);
break;
}
show_cursor();
if(edbox_visible) edbox_show();
}
void edbox_addchr(char c) {
edit_box[edbox_len++] = c;
edbox_pos = edbox_len;
}
void edbox_space(void) {
edbox_addchr(' ');
}
void edbox_set(char *contents) {
edbox_clear();
while(*contents) {
edit_box[edbox_len++] = *contents++;
}
edbox_pos = edbox_len;
}
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