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/* xmenu
* a simple fuzzy-selection menu made with Xlib
*/
#include <err.h>
#include <stdio.h>
#include <sys/stat.h>
#define ARENA_IMPL
#define STR_IMPL
#include "arena.h"
#include "dynarr.h"
#include "str.h"
#include "ui.h"
typedef DYNARR(char) DynStr;
int
umod(int a, int b)
{
if (a < 0) {
return b + a % b;
} else {
return a % b;
}
}
int
txt_insert(DynStr *s, int i, Str ins)
{
DA_FIT(s, s->n + ins.n);
if (i < s->n) {
memmove(s->v + i + ins.n, s->v + i, s->n - i);
}
memcpy(s->v + i, ins.s, ins.n);
s->n += ins.n;
return i + ins.n;
}
int
txt_delete(DynStr *s, int i, int n)
{
if (n > i) n = i;
if (n > 0) {
memmove(s->v + i - n, s->v + i, s->n - i);
s->n -= n;
}
return i - n;
}
int
read_all(FILE *f, DynStr *out, Arena *a)
{
char buf[256];
while (!feof(f)) {
size_t n = fread(buf, 1, sizeof buf, f);
if (ferror(f)) return -1;
DA_APUSH_MULT(out, a, buf, n);
}
return 0;
}
int
main(int argc, char **argv)
{
ui_init(argc, argv);
Arena a = { 0 };
DynStr input = { 0 };
int inpi = 0;
int seli = 0;
UiOpts opt = { 0 };
DynStr buf = { 0 };
if (read_all(stdin, &buf, &a)) err(1, "stdin");
for (Str src = { buf.v, buf.n }; src.n > 0; ) {
Cut c = str_cut(src, '\n');
DA_APUSH(&opt, &a, c.head);
src = c.tail;
}
if (!opt.n) goto done;
for (UiEvent ev; ui_wait_event(&ev); ) {
switch (ev.type) {
case UI_KEY_DOWN:
switch (ev.key.key) {
case UIK_ESCAPE:
goto done;
case UIK_BACKSPACE:
inpi = txt_delete(&input, inpi, 1);
goto draw;
case UIK_RETURN: {
Str o = opt.v[seli];
printf("%.*s\n", (int)o.n, o.s);
} goto done;
case UIK_DOWN:
seli = umod(seli + 1, opt.n);
goto draw;
case UIK_UP:
seli = umod(seli - 1, opt.n);
goto draw;
case UIK_LEFT:
if (inpi > 0) inpi--;
goto draw;
case UIK_RIGHT:
if (inpi < input.n) inpi++;
goto draw;
case UIK_HOME:
inpi = 0;
goto draw;
case UIK_END:
inpi = input.n;
goto draw;
default:
if (!ev.key.strn) break;
inpi = txt_insert(&input, inpi, (Str) { ev.key.str, ev.key.strn });
seli = 0;
goto draw;
}
break;
case UI_REDRAW:
draw:
ui_draw(
(Str) { input.v, input.n },
inpi,
seli,
opt
);
break;
default:
break;
}
}
done:
ui_fini();
return 0;
}
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