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csi.c
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csi.c
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#include "csi.h"
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#if defined(_DEBUG)
#include <stdio.h>
#endif
#include <sys/timerfd.h>
#define LOG_MODULE "csi"
#define LOG_ENABLE_DBG 0
#include "log.h"
#include "char32.h"
#include "config.h"
#include "debug.h"
#include "grid.h"
#include "selection.h"
#include "sixel.h"
#include "util.h"
#include "version.h"
#include "vt.h"
#include "xmalloc.h"
#include "xsnprintf.h"
#define UNHANDLED() LOG_DBG("unhandled: %s", csi_as_string(term, final, -1))
#define UNHANDLED_SGR(idx) LOG_DBG("unhandled: %s", csi_as_string(term, 'm', idx))
static void
sgr_reset(struct terminal *term)
{
memset(&term->vt.attrs, 0, sizeof(term->vt.attrs));
}
static const char *
csi_as_string(struct terminal *term, uint8_t final, int idx)
{
static char msg[1024];
int c = snprintf(msg, sizeof(msg), "CSI: ");
for (size_t i = idx >= 0 ? idx : 0;
i < (idx >= 0 ? idx + 1 : term->vt.params.idx);
i++)
{
c += snprintf(&msg[c], sizeof(msg) - c, "%u",
term->vt.params.v[i].value);
for (size_t j = 0; j < term->vt.params.v[i].sub.idx; j++) {
c += snprintf(&msg[c], sizeof(msg) - c, ":%u",
term->vt.params.v[i].sub.value[j]);
}
c += snprintf(&msg[c], sizeof(msg) - c, "%s",
i == term->vt.params.idx - 1 ? "" : ";");
}
for (size_t i = 0; i < sizeof(term->vt.private); i++) {
char value = (term->vt.private >> (i * 8)) & 0xff;
if (value == 0)
break;
c += snprintf(&msg[c], sizeof(msg) - c, "%c", value);
}
snprintf(&msg[c], sizeof(msg) - c, "%c (%u parameters)",
final, idx >= 0 ? 1 : term->vt.params.idx);
return msg;
}
static void
csi_sgr(struct terminal *term)
{
if (term->vt.params.idx == 0) {
sgr_reset(term);
return;
}
for (size_t i = 0; i < term->vt.params.idx; i++) {
const int param = term->vt.params.v[i].value;
switch (param) {
case 0:
sgr_reset(term);
break;
case 1: term->vt.attrs.bold = true; break;
case 2: term->vt.attrs.dim = true; break;
case 3: term->vt.attrs.italic = true; break;
case 4: term->vt.attrs.underline = true; break;
case 5: term->vt.attrs.blink = true; break;
case 6: LOG_WARN("ignored: rapid blink"); break;
case 7: term->vt.attrs.reverse = true; break;
case 8: term->vt.attrs.conceal = true; break;
case 9: term->vt.attrs.strikethrough = true; break;
case 21: break; /* double-underline, not implemented */
case 22: term->vt.attrs.bold = term->vt.attrs.dim = false; break;
case 23: term->vt.attrs.italic = false; break;
case 24: term->vt.attrs.underline = false; break;
case 25: term->vt.attrs.blink = false; break;
case 26: break; /* rapid blink, ignored */
case 27: term->vt.attrs.reverse = false; break;
case 28: term->vt.attrs.conceal = false; break;
case 29: term->vt.attrs.strikethrough = false; break;
/* Regular foreground colors */
case 30:
case 31:
case 32:
case 33:
case 34:
case 35:
case 36:
case 37:
term->vt.attrs.fg_src = COLOR_BASE16;
term->vt.attrs.fg = param - 30;
break;
case 38:
case 48: {
uint32_t color;
enum color_source src;
/* Indexed: 38;5;<idx> */
if (term->vt.params.idx - i - 1 >= 2 &&
term->vt.params.v[i + 1].value == 5)
{
src = COLOR_BASE256;
color = min(term->vt.params.v[i + 2].value,
ALEN(term->colors.table) - 1);
i += 2;
}
/* RGB: 38;2;<r>;<g>;<b> */
else if (term->vt.params.idx - i - 1 >= 4 &&
term->vt.params.v[i + 1].value == 2)
{
uint8_t r = term->vt.params.v[i + 2].value;
uint8_t g = term->vt.params.v[i + 3].value;
uint8_t b = term->vt.params.v[i + 4].value;
src = COLOR_RGB;
color = r << 16 | g << 8 | b;
i += 4;
}
/* Indexed: 38:5:<idx> */
else if (term->vt.params.v[i].sub.idx >= 2 &&
term->vt.params.v[i].sub.value[0] == 5)
{
src = COLOR_BASE256;
color = min(term->vt.params.v[i].sub.value[1],
ALEN(term->colors.table) - 1);
}
/*
* RGB: 38:2:<color-space>:r:g:b[:ignored:tolerance:tolerance-color-space]
* RGB: 38:2:r:g:b
*
* The second version is a "bastard" version - many
* programs "forget" the color space ID
* parameter... *sigh*
*/
else if (term->vt.params.v[i].sub.idx >= 4 &&
term->vt.params.v[i].sub.value[0] == 2)
{
const struct vt_param *param = &term->vt.params.v[i];
bool have_color_space_id = param->sub.idx >= 5;
/* 0 - color space (ignored) */
int r_idx = 2 - !have_color_space_id;
int g_idx = 3 - !have_color_space_id;
int b_idx = 4 - !have_color_space_id;
/* 5 - unused */
/* 6 - CS tolerance */
/* 7 - color space associated with tolerance */
uint8_t r = param->sub.value[r_idx];
uint8_t g = param->sub.value[g_idx];
uint8_t b = param->sub.value[b_idx];
src = COLOR_RGB;
color = r << 16 | g << 8 | b;
}
/* Transparent: 38:1 */
/* CMY: 38:3:<color-space>:c:m:y[:tolerance:tolerance-color-space] */
/* CMYK: 38:4:<color-space>:c:m:y:k[:tolerance:tolerance-color-space] */
/* Unrecognized */
else {
UNHANDLED_SGR(i);
break;
}
if (param == 38) {
term->vt.attrs.fg_src = src;
term->vt.attrs.fg = color;
} else {
xassert(param == 48);
term->vt.attrs.bg_src = src;
term->vt.attrs.bg = color;
}
break;
}
case 39:
term->vt.attrs.fg_src = COLOR_DEFAULT;
break;
/* Regular background colors */
case 40:
case 41:
case 42:
case 43:
case 44:
case 45:
case 46:
case 47:
term->vt.attrs.bg_src = COLOR_BASE16;
term->vt.attrs.bg = param - 40;
break;
case 49:
term->vt.attrs.bg_src = COLOR_DEFAULT;
break;
/* Bright foreground colors */
case 90:
case 91:
case 92:
case 93:
case 94:
case 95:
case 96:
case 97:
term->vt.attrs.fg_src = COLOR_BASE16;
term->vt.attrs.fg = param - 90 + 8;
break;
/* Bright background colors */
case 100:
case 101:
case 102:
case 103:
case 104:
case 105:
case 106:
case 107:
term->vt.attrs.bg_src = COLOR_BASE16;
term->vt.attrs.bg = param - 100 + 8;
break;
default:
UNHANDLED_SGR(i);
break;
}
}
}
static void
decset_decrst(struct terminal *term, unsigned param, bool enable)
{
#if defined(_DEBUG)
/* For UNHANDLED() */
int UNUSED final = enable ? 'h' : 'l';
#endif
/* Note: update XTSAVE/XTRESTORE if adding/removing things here */
switch (param) {
case 1:
/* DECCKM */
term->cursor_keys_mode =
enable ? CURSOR_KEYS_APPLICATION : CURSOR_KEYS_NORMAL;
break;
case 5:
/* DECSCNM */
term->reverse = enable;
term_damage_all(term);
term_damage_margins(term);
break;
case 6: {
/* DECOM */
term->origin = enable ? ORIGIN_RELATIVE : ORIGIN_ABSOLUTE;
term_cursor_home(term);
break;
}
case 7:
/* DECAWM */
term->auto_margin = enable;
term->grid->cursor.lcf = false;
break;
case 9:
if (enable)
LOG_WARN("unimplemented: X10 mouse tracking mode");
#if 0
else if (term->mouse_tracking == MOUSE_X10)
term->mouse_tracking = MOUSE_NONE;
#endif
break;
case 12:
term->cursor_blink.decset = enable;
term_cursor_blink_update(term);
break;
case 25:
/* DECTCEM */
term->hide_cursor = !enable;
break;
case 45:
term->reverse_wrap = enable;
break;
case 66:
/* DECNKM */
term->keypad_keys_mode = enable ? KEYPAD_APPLICATION : KEYPAD_NUMERICAL;
break;
case 80:
term->sixel.scrolling = !enable;
break;
case 1000:
if (enable)
term->mouse_tracking = MOUSE_CLICK;
else if (term->mouse_tracking == MOUSE_CLICK)
term->mouse_tracking = MOUSE_NONE;
term_xcursor_update(term);
break;
case 1001:
if (enable)
LOG_WARN("unimplemented: highlight mouse tracking");
break;
case 1002:
if (enable)
term->mouse_tracking = MOUSE_DRAG;
else if (term->mouse_tracking == MOUSE_DRAG)
term->mouse_tracking = MOUSE_NONE;
term_xcursor_update(term);
break;
case 1003:
if (enable)
term->mouse_tracking = MOUSE_MOTION;
else if (term->mouse_tracking == MOUSE_MOTION)
term->mouse_tracking = MOUSE_NONE;
term_xcursor_update(term);
break;
case 1004:
term->focus_events = enable;
break;
case 1005:
if (enable)
LOG_WARN("unimplemented: mouse reporting mode: UTF-8");
#if 0
else if (term->mouse_reporting == MOUSE_UTF8)
term->mouse_reporting = MOUSE_NONE;
#endif
break;
case 1006:
if (enable)
term->mouse_reporting = MOUSE_SGR;
else if (term->mouse_reporting == MOUSE_SGR)
term->mouse_reporting = MOUSE_NORMAL;
break;
case 1007:
term->alt_scrolling = enable;
break;
case 1015:
if (enable)
term->mouse_reporting = MOUSE_URXVT;
else if (term->mouse_reporting == MOUSE_URXVT)
term->mouse_reporting = MOUSE_NORMAL;
break;
case 1016:
if (enable)
term->mouse_reporting = MOUSE_SGR_PIXELS;
else if (term->mouse_reporting == MOUSE_SGR_PIXELS)
term->mouse_reporting = MOUSE_NORMAL;
break;
case 1034:
/* smm */
LOG_DBG("%s 8-bit meta mode", enable ? "enabling" : "disabling");
term->meta.eight_bit = enable;
break;
case 1035:
/* numLock */
LOG_DBG("%s Num Lock modifier", enable ? "enabling" : "disabling");
term->num_lock_modifier = enable;
break;
case 1036:
/* metaSendsEscape */
LOG_DBG("%s meta-sends-escape", enable ? "enabling" : "disabling");
term->meta.esc_prefix = enable;
break;
case 1042:
term->bell_action_enabled = enable;
break;
#if 0
case 1043:
LOG_WARN("unimplemented: raise window on ctrl-g");
break;
#endif
case 1048:
if (enable)
term_save_cursor(term);
else
term_restore_cursor(term, &term->grid->saved_cursor);
break;
case 47:
case 1047:
case 1049:
if (enable && term->grid != &term->alt) {
selection_cancel(term);
if (param == 1049)
term_save_cursor(term);
term->grid = &term->alt;
/* Cursor retains its position from the normal grid */
term_cursor_to(
term,
min(term->normal.cursor.point.row, term->rows - 1),
min(term->normal.cursor.point.col, term->cols - 1));
tll_free(term->normal.scroll_damage);
term_erase(term, 0, 0, term->rows - 1, term->cols - 1);
}
else if (!enable && term->grid == &term->alt) {
selection_cancel(term);
term->grid = &term->normal;
/* Cursor retains its position from the alt grid */
term_cursor_to(
term, min(term->alt.cursor.point.row, term->rows - 1),
min(term->alt.cursor.point.col, term->cols - 1));
if (param == 1049)
term_restore_cursor(term, &term->grid->saved_cursor);
/* Delete all sixel images on the alt screen */
tll_foreach(term->alt.sixel_images, it) {
sixel_destroy(&it->item);
tll_remove(term->alt.sixel_images, it);
}
tll_free(term->alt.scroll_damage);
term_damage_view(term);
}
term_update_ascii_printer(term);
break;
case 1070:
term->sixel.use_private_palette = enable;
break;
case 2004:
term->bracketed_paste = enable;
break;
case 2026:
if (enable)
term_enable_app_sync_updates(term);
else
term_disable_app_sync_updates(term);
break;
case 2027:
term->grapheme_shaping = enable;
break;
case 8452:
term->sixel.cursor_right_of_graphics = enable;
break;
case 737769:
if (enable)
term_ime_enable(term);
else
term_ime_disable(term);
break;
default:
UNHANDLED();
break;
}
}
static void
decset(struct terminal *term, unsigned param)
{
decset_decrst(term, param, true);
}
static void
decrst(struct terminal *term, unsigned param)
{
decset_decrst(term, param, false);
}
/*
* These values represent the current state of a DEC private mode,
* as returned in the DECRPM reply to a DECRQM query.
*/
enum decrpm_status {
DECRPM_NOT_RECOGNIZED = 0,
DECRPM_SET = 1,
DECRPM_RESET = 2,
DECRPM_PERMANENTLY_SET = 3,
DECRPM_PERMANENTLY_RESET = 4,
};
static enum decrpm_status
decrpm(bool enabled)
{
return enabled ? DECRPM_SET : DECRPM_RESET;
}
static enum decrpm_status
decrqm(const struct terminal *term, unsigned param)
{
switch (param) {
case 1: return decrpm(term->cursor_keys_mode == CURSOR_KEYS_APPLICATION);
case 5: return decrpm(term->reverse);
case 6: return decrpm(term->origin);
case 7: return decrpm(term->auto_margin);
case 9: return DECRPM_PERMANENTLY_RESET; /* term->mouse_tracking == MOUSE_X10; */
case 12: return decrpm(term->cursor_blink.decset);
case 25: return decrpm(!term->hide_cursor);
case 45: return decrpm(term->reverse_wrap);
case 66: return decrpm(term->keypad_keys_mode == KEYPAD_APPLICATION);
case 80: return decrpm(!term->sixel.scrolling);
case 1000: return decrpm(term->mouse_tracking == MOUSE_CLICK);
case 1001: return DECRPM_PERMANENTLY_RESET;
case 1002: return decrpm(term->mouse_tracking == MOUSE_DRAG);
case 1003: return decrpm(term->mouse_tracking == MOUSE_MOTION);
case 1004: return decrpm(term->focus_events);
case 1005: return DECRPM_PERMANENTLY_RESET; /* term->mouse_reporting == MOUSE_UTF8; */
case 1006: return decrpm(term->mouse_reporting == MOUSE_SGR);
case 1007: return decrpm(term->alt_scrolling);
case 1015: return decrpm(term->mouse_reporting == MOUSE_URXVT);
case 1016: return decrpm(term->mouse_reporting == MOUSE_SGR_PIXELS);
case 1034: return decrpm(term->meta.eight_bit);
case 1035: return decrpm(term->num_lock_modifier);
case 1036: return decrpm(term->meta.esc_prefix);
case 1042: return decrpm(term->bell_action_enabled);
case 47: /* FALLTHROUGH */
case 1047: /* FALLTHROUGH */
case 1049: return decrpm(term->grid == &term->alt);
case 1070: return decrpm(term->sixel.use_private_palette);
case 2004: return decrpm(term->bracketed_paste);
case 2026: return decrpm(term->render.app_sync_updates.enabled);
case 2027: return term->conf->tweak.grapheme_width_method != GRAPHEME_WIDTH_DOUBLE
? DECRPM_PERMANENTLY_RESET
: decrpm(term->grapheme_shaping);
case 8452: return decrpm(term->sixel.cursor_right_of_graphics);
case 737769: return decrpm(term_ime_is_enabled(term));
}
return DECRPM_NOT_RECOGNIZED;
}
static void
xtsave(struct terminal *term, unsigned param)
{
switch (param) {
case 1: term->xtsave.application_cursor_keys = term->cursor_keys_mode == CURSOR_KEYS_APPLICATION; break;
case 5: term->xtsave.reverse = term->reverse; break;
case 6: term->xtsave.origin = term->origin; break;
case 7: term->xtsave.auto_margin = term->auto_margin; break;
case 9: /* term->xtsave.mouse_x10 = term->mouse_tracking == MOUSE_X10; */ break;
case 12: term->xtsave.cursor_blink = term->cursor_blink.decset; break;
case 25: term->xtsave.show_cursor = !term->hide_cursor; break;
case 45: term->xtsave.reverse_wrap = term->reverse_wrap; break;
case 47: term->xtsave.alt_screen = term->grid == &term->alt; break;
case 66: term->xtsave.application_keypad_keys = term->keypad_keys_mode == KEYPAD_APPLICATION; break;
case 80: term->xtsave.sixel_display_mode = !term->sixel.scrolling; break;
case 1000: term->xtsave.mouse_click = term->mouse_tracking == MOUSE_CLICK; break;
case 1001: break;
case 1002: term->xtsave.mouse_drag = term->mouse_tracking == MOUSE_DRAG; break;
case 1003: term->xtsave.mouse_motion = term->mouse_tracking == MOUSE_MOTION; break;
case 1004: term->xtsave.focus_events = term->focus_events; break;
case 1005: /* term->xtsave.mouse_utf8 = term->mouse_reporting == MOUSE_UTF8; */ break;
case 1006: term->xtsave.mouse_sgr = term->mouse_reporting == MOUSE_SGR; break;
case 1007: term->xtsave.alt_scrolling = term->alt_scrolling; break;
case 1015: term->xtsave.mouse_urxvt = term->mouse_reporting == MOUSE_URXVT; break;
case 1016: term->xtsave.mouse_sgr_pixels = term->mouse_reporting == MOUSE_SGR_PIXELS; break;
case 1034: term->xtsave.meta_eight_bit = term->meta.eight_bit; break;
case 1035: term->xtsave.num_lock_modifier = term->num_lock_modifier; break;
case 1036: term->xtsave.meta_esc_prefix = term->meta.esc_prefix; break;
case 1042: term->xtsave.bell_action_enabled = term->bell_action_enabled; break;
case 1047: term->xtsave.alt_screen = term->grid == &term->alt; break;
case 1048: term_save_cursor(term); break;
case 1049: term->xtsave.alt_screen = term->grid == &term->alt; break;
case 1070: term->xtsave.sixel_private_palette = term->sixel.use_private_palette; break;
case 2004: term->xtsave.bracketed_paste = term->bracketed_paste; break;
case 2026: term->xtsave.app_sync_updates = term->render.app_sync_updates.enabled; break;
case 2027: term->xtsave.grapheme_shaping = term->grapheme_shaping; break;
case 8452: term->xtsave.sixel_cursor_right_of_graphics = term->sixel.cursor_right_of_graphics; break;
case 737769: term->xtsave.ime = term_ime_is_enabled(term); break;
}
}
static void
xtrestore(struct terminal *term, unsigned param)
{
bool enable;
switch (param) {
case 1: enable = term->xtsave.application_cursor_keys; break;
case 5: enable = term->xtsave.reverse; break;
case 6: enable = term->xtsave.origin; break;
case 7: enable = term->xtsave.auto_margin; break;
case 9: /* enable = term->xtsave.mouse_x10; break; */ return;
case 12: enable = term->xtsave.cursor_blink; break;
case 25: enable = term->xtsave.show_cursor; break;
case 45: enable = term->xtsave.reverse_wrap; break;
case 47: enable = term->xtsave.alt_screen; break;
case 66: enable = term->xtsave.application_keypad_keys; break;
case 80: enable = term->xtsave.sixel_display_mode; break;
case 1000: enable = term->xtsave.mouse_click; break;
case 1001: return;
case 1002: enable = term->xtsave.mouse_drag; break;
case 1003: enable = term->xtsave.mouse_motion; break;
case 1004: enable = term->xtsave.focus_events; break;
case 1005: /* enable = term->xtsave.mouse_utf8; break; */ return;
case 1006: enable = term->xtsave.mouse_sgr; break;
case 1007: enable = term->xtsave.alt_scrolling; break;
case 1015: enable = term->xtsave.mouse_urxvt; break;
case 1016: enable = term->xtsave.mouse_sgr_pixels; break;
case 1034: enable = term->xtsave.meta_eight_bit; break;
case 1035: enable = term->xtsave.num_lock_modifier; break;
case 1036: enable = term->xtsave.meta_esc_prefix; break;
case 1042: enable = term->xtsave.bell_action_enabled; break;
case 1047: enable = term->xtsave.alt_screen; break;
case 1048: enable = true; break;
case 1049: enable = term->xtsave.alt_screen; break;
case 1070: enable = term->xtsave.sixel_private_palette; break;
case 2004: enable = term->xtsave.bracketed_paste; break;
case 2026: enable = term->xtsave.app_sync_updates; break;
case 2027: enable = term->xtsave.grapheme_shaping; break;
case 8452: enable = term->xtsave.sixel_cursor_right_of_graphics; break;
case 737769: enable = term->xtsave.ime; break;
default: return;
}
decset_decrst(term, param, enable);
}
void
csi_dispatch(struct terminal *term, uint8_t final)
{
LOG_DBG("%s (%08x)", csi_as_string(term, final, -1), term->vt.private);
switch (term->vt.private) {
case 0: {
switch (final) {
case 'b':
if (term->vt.last_printed != 0) {
/*
* Note: we never reset 'last-printed'. According to
* ECMA-48, the behaviour is undefined if REP was
* _not_ preceded by a graphical character.
*/
int count = vt_param_get(term, 0, 1);
LOG_DBG("REP: '%lc' %d times", (wint_t)term->vt.last_printed, count);
const int width = c32width(term->vt.last_printed);
if (width > 0) {
for (int i = 0; i < count; i++)
term_print(term, term->vt.last_printed, width);
}
}
break;
case 'c': {
if (vt_param_get(term, 0, 0) != 0) {
UNHANDLED();
break;
}
/* Send Device Attributes (Primary DA) */
/*
* Responses:
* - CSI?1;2c vt100 with advanced video option
* - CSI?1;0c vt101 with no options
* - CSI?6c vt102
* - CSI?62;<Ps>c vt220
* - CSI?63;<Ps>c vt320
* - CSI?64;<Ps>c vt420
*
* Ps (response may contain multiple):
* - 1 132 columns
* - 2 Printer.
* - 3 ReGIS graphics.
* - 4 Sixel graphics.
* - 6 Selective erase.
* - 8 User-defined keys.
* - 9 National Replacement Character sets.
* - 15 Technical characters.
* - 16 Locator port.
* - 17 Terminal state interrogation.
* - 18 User windows.
* - 21 Horizontal scrolling.
* - 22 ANSI color, e.g., VT525.
* - 28 Rectangular editing.
* - 29 ANSI text locator (i.e., DEC Locator mode).
*
* Note: we report ourselves as a VT220, mainly to be able
* to pass parameters, to indicate we support sixel, and
* ANSI colors.
*
* The VT level must be synchronized with the secondary DA
* response.
*
* Note: tertiary DA responds with "FOOT".
*/
if (term->conf->tweak.sixel) {
static const char reply[] = "\033[?62;4;22c";
term_to_slave(term, reply, sizeof(reply) - 1);
} else {
static const char reply[] = "\033[?62;22c";
term_to_slave(term, reply, sizeof(reply) - 1);
}
break;
}
case 'd': {
/* VPA - vertical line position absolute */
int rel_row = vt_param_get(term, 0, 1) - 1;
int row = term_row_rel_to_abs(term, rel_row);
term_cursor_to(term, row, term->grid->cursor.point.col);
break;
}
case 'm':
csi_sgr(term);
break;
case 'A':
term_cursor_up(term, vt_param_get(term, 0, 1));
break;
case 'e':
case 'B':
term_cursor_down(term, vt_param_get(term, 0, 1));
break;
case 'a':
case 'C':
term_cursor_right(term, vt_param_get(term, 0, 1));
break;
case 'D':
term_cursor_left(term, vt_param_get(term, 0, 1));
break;
case 'E':
/* CNL - Cursor Next Line */
term_cursor_down(term, vt_param_get(term, 0, 1));
term_cursor_left(term, term->grid->cursor.point.col);
break;
case 'F':
/* CPL - Cursor Previous Line */
term_cursor_up(term, vt_param_get(term, 0, 1));
term_cursor_left(term, term->grid->cursor.point.col);
break;
case 'g': {
int param = vt_param_get(term, 0, 0);
switch (param) {
case 0:
/* Clear tab stop at *current* column */
tll_foreach(term->tab_stops, it) {
if (it->item == term->grid->cursor.point.col)
tll_remove(term->tab_stops, it);
else if (it->item > term->grid->cursor.point.col)
break;
}
break;
case 3:
/* Clear *all* tabs */
tll_free(term->tab_stops);
break;
default:
UNHANDLED();
break;
}
break;
}
case '`':
case 'G': {
/* Cursor horizontal absolute */
int col = min(vt_param_get(term, 0, 1), term->cols) - 1;
term_cursor_col(term, col);
break;
}
case 'f':
case 'H': {
/* Move cursor */
int rel_row = vt_param_get(term, 0, 1) - 1;
int row = term_row_rel_to_abs(term, rel_row);
int col = min(vt_param_get(term, 1, 1), term->cols) - 1;
term_cursor_to(term, row, col);
break;
}
case 'J': {
/* Erase screen */
int param = vt_param_get(term, 0, 0);
switch (param) {
case 0: {
/* From cursor to end of screen */
const struct coord *cursor = &term->grid->cursor.point;
term_erase(
term,
cursor->row, cursor->col,
term->rows - 1, term->cols - 1);
term->grid->cursor.lcf = false;
break;
}
case 1: {
/* From start of screen to cursor */
const struct coord *cursor = &term->grid->cursor.point;
term_erase(term, 0, 0, cursor->row, cursor->col);
term->grid->cursor.lcf = false;
break;
}
case 2:
/* Erase entire screen */
term_erase(term, 0, 0, term->rows - 1, term->cols - 1);
term->grid->cursor.lcf = false;
break;
case 3: {
/* Erase scrollback */
term_erase_scrollback(term);
break;
}
default:
UNHANDLED();
break;
}
break;
}
case 'K': {
/* Erase line */
int param = vt_param_get(term, 0, 0);
switch (param) {
case 0: {
/* From cursor to end of line */
const struct coord *cursor = &term->grid->cursor.point;
term_erase(
term,
cursor->row, cursor->col,
cursor->row, term->cols - 1);
term->grid->cursor.lcf = false;
break;
}
case 1: {
/* From start of line to cursor */
const struct coord *cursor = &term->grid->cursor.point;
term_erase(term, cursor->row, 0, cursor->row, cursor->col);
term->grid->cursor.lcf = false;
break;
}
case 2: {
/* Entire line */
const struct coord *cursor = &term->grid->cursor.point;
term_erase(term, cursor->row, 0, cursor->row, term->cols - 1);
term->grid->cursor.lcf = false;
break;
}
default:
UNHANDLED();
break;
}
break;
}
case 'L': { /* IL */
if (term->grid->cursor.point.row < term->scroll_region.start ||
term->grid->cursor.point.row >= term->scroll_region.end)
break;
int count = min(
vt_param_get(term, 0, 1),
term->scroll_region.end - term->grid->cursor.point.row);
term_scroll_reverse_partial(
term,
(struct scroll_region){
.start = term->grid->cursor.point.row,
.end = term->scroll_region.end},
count);
term->grid->cursor.lcf = false;
term->grid->cursor.point.col = 0;
break;
}
case 'M': { /* DL */
if (term->grid->cursor.point.row < term->scroll_region.start ||
term->grid->cursor.point.row >= term->scroll_region.end)
break;
int count = min(
vt_param_get(term, 0, 1),
term->scroll_region.end - term->grid->cursor.point.row);
term_scroll_partial(
term,
(struct scroll_region){
.start = term->grid->cursor.point.row,
.end = term->scroll_region.end},
count);
term->grid->cursor.lcf = false;
term->grid->cursor.point.col = 0;
break;
}
case 'P': {
/* DCH: Delete character(s) */
/* Number of characters to delete */
int count = min(
vt_param_get(term, 0, 1), term->cols - term->grid->cursor.point.col);
/* Number of characters left after deletion (on current line) */
int remaining = term->cols - (term->grid->cursor.point.col + count);
/* 'Delete' characters by moving the remaining ones */
memmove(&term->grid->cur_row->cells[term->grid->cursor.point.col],
&term->grid->cur_row->cells[term->grid->cursor.point.col + count],
remaining * sizeof(term->grid->cur_row->cells[0]));
for (size_t c = 0; c < remaining; c++)
term->grid->cur_row->cells[term->grid->cursor.point.col + c].attrs.clean = 0;
term->grid->cur_row->dirty = true;
/* Erase the remainder of the line */
const struct coord *cursor = &term->grid->cursor.point;
term_erase(
term,
cursor->row, cursor->col + remaining,
cursor->row, term->cols - 1);
term->grid->cursor.lcf = false;
break;
}
case '@': {
/* ICH: insert character(s) */
/* Number of characters to insert */
int count = min(
vt_param_get(term, 0, 1), term->cols - term->grid->cursor.point.col);
/* Characters to move */