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#include "osc.h"
#include "../internal.h"
#include "../palette.h"
#include "../screen.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#define OSC_HEAP_INIT 4096
#define OSC_HEAP_KEEP (1u << 20)
size_t term_osc_room(const struct term *t)
{
size_t cap = t->osc_heap ? t->osc_heap_cap : sizeof(t->osc_buf);
return cap - 1 - (size_t)t->osc_len;
}
char *term_osc_tail(struct term *t)
{
return (t->osc_heap ? t->osc_heap : t->osc_buf) + t->osc_len;
}
void term_osc_commit(struct term *t, size_t n)
{
t->osc_len += (int)n;
}
char *term_osc_data(struct term *t)
{
return t->osc_heap ? t->osc_heap : t->osc_buf;
}
bool term_osc_grow(struct term *t)
{
if (!t->osc_heap) {
char *p = malloc(OSC_HEAP_INIT);
if (!p) return false;
memcpy(p, t->osc_buf, (size_t)t->osc_len);
t->osc_heap = p;
t->osc_heap_cap = OSC_HEAP_INIT;
return true;
}
if (t->osc_heap_cap >= TERM_OSC_MAX) return false;
size_t cap = t->osc_heap_cap * 2;
if (cap > TERM_OSC_MAX) cap = TERM_OSC_MAX;
char *p = realloc(t->osc_heap, cap);
if (!p) return false;
t->osc_heap = p;
t->osc_heap_cap = cap;
return true;
}
void term_osc_cleanup(struct term *t)
{
free(t->osc_heap);
t->osc_heap = NULL;
t->osc_heap_cap = 0;
free(t->dcs_buf);
t->dcs_buf = NULL;
t->dcs_cap = 0;
term_osc8_cleanup(t);
free(t->cwd);
t->cwd = NULL;
free(t->pointer_shape);
t->pointer_shape = NULL;
}
/* Reply to a color query. An OSC 4 reply names the index it answers for;
* index is negative for OSC 10, 11, and 12. */
static void send_color_query_reply(struct term *t, int code, int index, uint32_t argb)
{
char resp[64], prefix[16] = "";
uint8_t r = (argb >> 16) & 0xff, g = (argb >> 8) & 0xff, b = argb & 0xff;
if (index >= 0)
snprintf(prefix, sizeof(prefix), "%d;", index);
snprintf(resp, sizeof(resp),
"\x1b]%d;%srgb:%02x%02x/%02x%02x/%02x%02x\x1b\\",
code, prefix, r, r, g, g, b, b);
send_response(t, resp);
}
static void osc_color_set_or_query(struct term *t, int code, const char *params, int slot)
{
if (!strcmp(params, "?")) {
send_color_query_reply(t, code, -1, t->palette.colors[slot]);
return;
}
uint32_t argb;
if (term_color_parse(params, &argb))
term_palette_set(&t->palette, slot, argb);
}
static long osc_next_index(const char **pp)
{
char *end;
long idx = strtol(*pp, &end, 10);
if (end == *pp || (*end != ';' && *end != '\0'))
return -1;
*pp = end;
if (**pp == ';') (*pp)++;
return idx;
}
static void osc4_handle(struct term *t, const char *params)
{
const char *p = params;
while (*p) {
long idx = osc_next_index(&p);
if (idx < 0)
return;
const char *spec = p;
const char *spec_end = spec;
while (*spec_end && *spec_end != ';')
spec_end++;
size_t spec_len = (size_t)(spec_end - spec);
if (spec_len == 1 && spec[0] == '?') {
if (idx <= 255)
send_color_query_reply(t, 4, (int)idx, t->palette.colors[idx]);
} else {
char buf[128];
if (idx <= 255 && spec_len < sizeof(buf)) {
memcpy(buf, spec, spec_len);
buf[spec_len] = '\0';
uint32_t argb;
if (term_color_parse(buf, &argb))
term_palette_set(&t->palette, (int)idx, argb);
}
}
p = spec_end;
if (*p == ';') p++;
}
}
static void osc104_handle(struct term *t, const char *params)
{
if (!*params) {
term_palette_reset_all(&t->palette);
return;
}
const char *p = params;
while (*p) {
long idx = osc_next_index(&p);
if (idx < 0)
return;
if (idx <= 255)
term_palette_reset(&t->palette, (int)idx);
}
}
void term_osc_finish(struct term *t)
{
if (!term_str_was_truncated(t)) {
char *buf = term_osc_data(t);
buf[t->osc_len] = '\0';
if (!t->alternate && t->osc_len >= 5 && !strncmp(buf, "133;", 4) &&
(buf[5] == ';' || buf[5] == '\0')) {
if (buf[4] == 'A') {
t->prompt_y = t->cursor_y;
t->has_prompt = true;
}
if (buf[4] == 'C' || buf[4] == 'D') {
t->prompt_y = -1;
t->has_prompt = false;
}
}
char *rest;
long code = strtol(buf, &rest, 10);
bool no_code = rest == buf;
bool legacy_title = no_code && !strchr(buf, ';');
if (no_code) {
code = legacy_title || *buf == ';' ? 0 : -1;
rest = buf;
}
if (code >= 0 && (legacy_title || *rest == ';' || *rest == '\0' || code <= 2)) {
const char *params = *rest == ';' ? rest + 1 : rest;
switch (code) {
case 0: case 1: case 2:
if (t->cb.title)
t->cb.title(t->cb.ud, params);
break;
case 4:
osc4_handle(t, params);
break;
case 8:
term_osc8(t, params);
break;
case 10:
osc_color_set_or_query(t, 10, params, TERM_PALETTE_FG);
break;
case 11:
osc_color_set_or_query(t, 11, params, TERM_PALETTE_BG);
break;
case 12:
osc_color_set_or_query(t, 12, params, TERM_PALETTE_CURSOR);
break;
case 52:
term_osc52(t, params);
break;
case 104:
osc104_handle(t, params);
break;
case 110:
term_palette_reset(&t->palette, TERM_PALETTE_FG);
break;
case 111:
term_palette_reset(&t->palette, TERM_PALETTE_BG);
break;
case 112:
term_palette_reset(&t->palette, TERM_PALETTE_CURSOR);
break;
default:
term_osc_misc_dispatch(t, code, params);
break;
}
}
}
t->osc_len = 0;
if (t->osc_heap && t->osc_heap_cap > OSC_HEAP_KEEP) {
free(t->osc_heap);
t->osc_heap = NULL;
t->osc_heap_cap = 0;
}
}
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