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/* $Id: tty.c,v 1.93 2009/04/29 17:06:45 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "tmux.h"
void tty_fill_acs(struct tty *);
u_char tty_get_acs(struct tty *, u_char);
void tty_raw(struct tty *, const char *);
int tty_try_256(struct tty *, u_char, const char *);
int tty_try_88(struct tty *, u_char, const char *);
void tty_attributes(struct tty *, const struct grid_cell *);
void tty_attributes_fg(struct tty *, const struct grid_cell *);
void tty_attributes_bg(struct tty *, const struct grid_cell *);
void tty_cmd_cell(struct tty *, struct window_pane *, va_list);
void tty_cmd_clearendofline(struct tty *, struct window_pane *, va_list);
void tty_cmd_clearendofscreen(struct tty *, struct window_pane *, va_list);
void tty_cmd_clearline(struct tty *, struct window_pane *, va_list);
void tty_cmd_clearscreen(struct tty *, struct window_pane *, va_list);
void tty_cmd_clearstartofline(struct tty *, struct window_pane *, va_list);
void tty_cmd_clearstartofscreen(struct tty *, struct window_pane *, va_list);
void tty_cmd_deletecharacter(struct tty *, struct window_pane *, va_list);
void tty_cmd_deleteline(struct tty *, struct window_pane *, va_list);
void tty_cmd_insertcharacter(struct tty *, struct window_pane *, va_list);
void tty_cmd_insertline(struct tty *, struct window_pane *, va_list);
void tty_cmd_linefeed(struct tty *, struct window_pane *, va_list);
void tty_cmd_raw(struct tty *, struct window_pane *, va_list);
void tty_cmd_reverseindex(struct tty *, struct window_pane *, va_list);
void (*tty_cmds[])(struct tty *, struct window_pane *, va_list) = {
tty_cmd_cell,
tty_cmd_clearendofline,
tty_cmd_clearendofscreen,
tty_cmd_clearline,
tty_cmd_clearscreen,
tty_cmd_clearstartofline,
tty_cmd_clearstartofscreen,
tty_cmd_deletecharacter,
tty_cmd_deleteline,
tty_cmd_insertcharacter,
tty_cmd_insertline,
tty_cmd_linefeed,
tty_cmd_raw,
tty_cmd_reverseindex,
};
void
tty_init(struct tty *tty, char *path, char *term)
{
tty->path = xstrdup(path);
if (term == NULL)
tty->termname = xstrdup("unknown");
else
tty->termname = xstrdup(term);
tty->flags = 0;
tty->term_flags = 0;
}
int
tty_open(struct tty *tty, char **cause)
{
int mode;
tty->fd = open(tty->path, O_RDWR|O_NONBLOCK);
if (tty->fd == -1) {
xasprintf(cause, "%s: %s", tty->path, strerror(errno));
return (-1);
}
if ((mode = fcntl(tty->fd, F_GETFL)) == -1)
fatal("fcntl failed");
if (fcntl(tty->fd, F_SETFL, mode|O_NONBLOCK) == -1)
fatal("fcntl failedo");
if (fcntl(tty->fd, F_SETFD, FD_CLOEXEC) == -1)
fatal("fcntl failed");
if (debug_level > 3)
tty->log_fd = open("tmux.out", O_WRONLY|O_CREAT|O_TRUNC, 0644);
else
tty->log_fd = -1;
if ((tty->term = tty_term_find(tty->termname, tty->fd, cause)) == NULL)
goto error;
tty->in = buffer_create(BUFSIZ);
tty->out = buffer_create(BUFSIZ);
tty->flags &= TTY_UTF8;
tty_start_tty(tty);
tty_keys_init(tty);
tty_fill_acs(tty);
return (0);
error:
close(tty->fd);
tty->fd = -1;
return (-1);
}
void
tty_start_tty(struct tty *tty)
{
struct termios tio;
#ifdef TIOCFLUSH
int what;
#endif
if (tcgetattr(tty->fd, &tty->tio) != 0)
fatal("tcgetattr failed");
memcpy(&tio, &tty->tio, sizeof tio);
tio.c_iflag &= ~(IXON|IXOFF|ICRNL|INLCR|IGNCR|IMAXBEL|ISTRIP);
tio.c_iflag |= IGNBRK;
tio.c_oflag &= ~(OPOST|ONLCR|OCRNL|ONLRET);
tio.c_lflag &= ~(IEXTEN|ICANON|ECHO|ECHOE|ECHONL|ECHOCTL|
ECHOPRT|ECHOKE|ECHOCTL|ISIG);
tio.c_cc[VMIN] = 1;
tio.c_cc[VTIME] = 0;
if (tcsetattr(tty->fd, TCSANOW, &tio) != 0)
fatal("tcsetattr failed");
#ifdef TIOCFLUSH
what = 0;
if (ioctl(tty->fd, TIOCFLUSH, &what) != 0)
fatal("ioctl(TIOCFLUSH)");
#endif
tty_putcode(tty, TTYC_IS1);
tty_putcode(tty, TTYC_IS2);
tty_putcode(tty, TTYC_IS3);
tty_putcode(tty, TTYC_SMCUP);
tty_putcode(tty, TTYC_SMKX);
tty_putcode(tty, TTYC_ENACS);
tty_putcode(tty, TTYC_CLEAR);
tty_putcode(tty, TTYC_CNORM);
if (tty_term_has(tty->term, TTYC_KMOUS))
tty_puts(tty, "\033[?1000l");
memcpy(&tty->cell, &grid_default_cell, sizeof tty->cell);
tty->cx = UINT_MAX;
tty->cy = UINT_MAX;
tty->rlower = UINT_MAX;
tty->rupper = UINT_MAX;
tty->mode = MODE_CURSOR;
}
void
tty_stop_tty(struct tty *tty)
{
struct winsize ws;
/*
* Be flexible about error handling and try not kill the server just
* because the fd is invalid. Things like ssh -t can easily leave us
* with a dead tty.
*/
if (ioctl(tty->fd, TIOCGWINSZ, &ws) == -1)
return;
if (tcsetattr(tty->fd, TCSANOW, &tty->tio) == -1)
return;
tty_raw(tty, tty_term_string2(tty->term, TTYC_CSR, 0, ws.ws_row - 1));
tty_raw(tty, tty_term_string(tty->term, TTYC_RMACS));
tty_raw(tty, tty_term_string(tty->term, TTYC_SGR0));
tty_raw(tty, tty_term_string(tty->term, TTYC_CLEAR));
tty_raw(tty, tty_term_string(tty->term, TTYC_RMKX));
tty_raw(tty, tty_term_string(tty->term, TTYC_RMCUP));
tty_raw(tty, tty_term_string(tty->term, TTYC_CNORM));
if (tty_term_has(tty->term, TTYC_KMOUS))
tty_raw(tty, "\033[?1000l");
}
void
tty_fill_acs(struct tty *tty)
{
const char *ptr;
memset(tty->acs, 0, sizeof tty->acs);
if (!tty_term_has(tty->term, TTYC_ACSC))
return;
ptr = tty_term_string(tty->term, TTYC_ACSC);
if (strlen(ptr) % 2 != 0)
return;
for (; *ptr != '\0'; ptr += 2)
tty->acs[(u_char) ptr[0]] = ptr[1];
}
u_char
tty_get_acs(struct tty *tty, u_char ch)
{
if (tty->acs[ch] != '\0')
return (tty->acs[ch]);
return (ch);
}
void
tty_close(struct tty *tty, int no_stop)
{
if (tty->fd == -1)
return;
if (tty->log_fd != -1) {
close(tty->log_fd);
tty->log_fd = -1;
}
if (!no_stop)
tty_stop_tty(tty);
tty_term_free(tty->term);
tty_keys_free(tty);
close(tty->fd);
tty->fd = -1;
buffer_destroy(tty->in);
buffer_destroy(tty->out);
}
void
tty_free(struct tty *tty, int no_stop)
{
tty_close(tty, no_stop);
if (tty->path != NULL)
xfree(tty->path);
if (tty->termname != NULL)
xfree(tty->termname);
}
void
tty_raw(struct tty *tty, const char *s)
{
write(tty->fd, s, strlen(s));
}
void
tty_putcode(struct tty *tty, enum tty_code_code code)
{
tty_puts(tty, tty_term_string(tty->term, code));
}
void
tty_putcode1(struct tty *tty, enum tty_code_code code, int a)
{
if (a < 0)
return;
tty_puts(tty, tty_term_string1(tty->term, code, a));
}
void
tty_putcode2(struct tty *tty, enum tty_code_code code, int a, int b)
{
if (a < 0 || b < 0)
return;
tty_puts(tty, tty_term_string2(tty->term, code, a, b));
}
void
tty_puts(struct tty *tty, const char *s)
{
if (*s == '\0')
return;
buffer_write(tty->out, s, strlen(s));
if (tty->log_fd != -1)
write(tty->log_fd, s, strlen(s));
}
void
tty_putc(struct tty *tty, char ch)
{
u_int sx;
if (tty->cell.attr & GRID_ATTR_CHARSET)
ch = tty_get_acs(tty, ch);
buffer_write8(tty->out, ch);
if (ch >= 0x20 && ch != 0x7f) {
sx = tty->sx;
if (tty->term->flags & TERM_EARLYWRAP)
sx--;
if (tty->cx == sx) {
tty->cx = 0;
tty->cy++;
} else
tty->cx++;
}
if (tty->log_fd != -1)
write(tty->log_fd, &ch, 1);
}
void
tty_set_title(struct tty *tty, const char *title)
{
if (strstr(tty->termname, "xterm") == NULL &&
strstr(tty->termname, "rxvt") == NULL &&
strcmp(tty->termname, "screen") != 0)
return;
tty_puts(tty, "\033]0;");
tty_puts(tty, title);
tty_putc(tty, '\007');
}
void
tty_update_mode(struct tty *tty, int mode)
{
int changed;
if (tty->flags & TTY_NOCURSOR)
mode &= ~MODE_CURSOR;
changed = mode ^ tty->mode;
if (changed & MODE_CURSOR) {
if (mode & MODE_CURSOR)
tty_putcode(tty, TTYC_CNORM);
else
tty_putcode(tty, TTYC_CIVIS);
}
if (changed & MODE_MOUSE) {
if (mode & MODE_MOUSE)
tty_puts(tty, "\033[?1000h");
else
tty_puts(tty, "\033[?1000l");
}
tty->mode = mode;
}
void
tty_emulate_repeat(
struct tty *tty, enum tty_code_code code, enum tty_code_code code1, u_int n)
{
if (tty_term_has(tty->term, code))
tty_putcode1(tty, code, n);
else {
while (n-- > 0)
tty_putcode(tty, code1);
}
}
/*
* Redraw scroll region using data from screen (already updated). Used when
* CSR not supported, or window is a pane that doesn't take up the full
* width of the terminal.
*/
void
tty_redraw_region(struct tty *tty, struct window_pane *wp)
{
struct screen *s = wp->screen;
u_int i;
/*
* If region is >= 50% of the screen, just schedule a window redraw. In
* most cases, this is likely to be followed by some more scrolling -
* without this, the entire pane ends up being redrawn many times which
* can be much more data.
*/
if (s->old_rupper - s->old_rlower >= screen_size_y(s) / 2) {
wp->flags |= PANE_REDRAW;
return;
}
if (s->old_cy < s->old_rupper || s->old_cy > s->old_rlower) {
for (i = s->old_cy; i < screen_size_y(s); i++)
tty_draw_line(tty, s, i, wp->xoff, wp->yoff);
} else {
for (i = s->old_rupper; i <= s->old_rlower; i++)
tty_draw_line(tty, s, i, wp->xoff, wp->yoff);
}
}
void
tty_draw_line(struct tty *tty, struct screen *s, u_int py, u_int ox, u_int oy)
{
const struct grid_cell *gc;
const struct grid_utf8 *gu;
u_int i, sx;
sx = screen_size_x(s);
if (sx > s->grid->size[s->grid->hsize + py])
sx = s->grid->size[s->grid->hsize + py];
if (sx > tty->sx)
sx = tty->sx;
tty_cursor(tty, 0, py, ox, oy);
for (i = 0; i < sx; i++) {
gc = grid_view_peek_cell(s->grid, i, py);
gu = NULL;
if (gc->flags & GRID_FLAG_UTF8)
gu = grid_view_peek_utf8(s->grid, i, py);
if (screen_check_selection(s, i, py)) {
s->sel.cell.data = gc->data;
tty_cell(tty, &s->sel.cell, gu);
} else
tty_cell(tty, gc, gu);
}
if (sx >= tty->sx)
return;
tty_reset(tty);
tty_cursor(tty, sx, py, ox, oy);
if (screen_size_x(s) >= tty->sx && tty_term_has(tty->term, TTYC_EL))
tty_putcode(tty, TTYC_EL);
else {
for (i = sx; i < screen_size_x(s); i++)
tty_putc(tty, ' ');
}
}
void
tty_write(struct tty *tty, struct window_pane *wp, enum tty_cmd cmd, ...)
{
va_list ap;
va_start(ap, cmd);
tty_vwrite(tty, wp, cmd, ap);
va_end(ap);
}
void
tty_vwrite(
struct tty *tty, struct window_pane *wp, enum tty_cmd cmd, va_list ap)
{
if (tty->flags & TTY_FREEZE || tty->term == NULL)
return;
if (tty_cmds[cmd] != NULL)
tty_cmds[cmd](tty, wp, ap);
}
void
tty_cmd_insertcharacter(struct tty *tty, struct window_pane *wp, va_list ap)
{
struct screen *s = wp->screen;
u_int ua;
if (wp->xoff != 0 || screen_size_x(s) < tty->sx) {
tty_draw_line(tty, wp->screen, s->old_cy, wp->xoff, wp->yoff);
return;
}
ua = va_arg(ap, u_int);
tty_reset(tty);
tty_cursor(tty, s->old_cx, s->old_cy, wp->xoff, wp->yoff);
if (tty_term_has(tty->term, TTYC_ICH) ||
tty_term_has(tty->term, TTYC_ICH1))
tty_emulate_repeat(tty, TTYC_ICH, TTYC_ICH1, ua);
else {
tty_putcode(tty, TTYC_SMIR);
while (ua-- > 0)
tty_putc(tty, ' ');
tty_putcode(tty, TTYC_RMIR);
}
}
void
tty_cmd_deletecharacter(struct tty *tty, struct window_pane *wp, va_list ap)
{
struct screen *s = wp->screen;
u_int ua;
if (wp->xoff != 0 || screen_size_x(s) < tty->sx) {
tty_draw_line(tty, wp->screen, s->old_cy, wp->xoff, wp->yoff);
return;
}
ua = va_arg(ap, u_int);
tty_reset(tty);
tty_cursor(tty, s->old_cx, s->old_cy, wp->xoff, wp->yoff);
tty_emulate_repeat(tty, TTYC_DCH, TTYC_DCH1, ua);
}
void
tty_cmd_insertline(struct tty *tty, struct window_pane *wp, va_list ap)
{
struct screen *s = wp->screen;
u_int ua;
if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
!tty_term_has(tty->term, TTYC_CSR)) {
tty_redraw_region(tty, wp);
return;
}
ua = va_arg(ap, u_int);
tty_reset(tty);
tty_region(tty, s->old_rupper, s->old_rlower, wp->yoff);
tty_cursor(tty, s->old_cx, s->old_cy, wp->xoff, wp->yoff);
tty_emulate_repeat(tty, TTYC_IL, TTYC_IL1, ua);
}
void
tty_cmd_deleteline(struct tty *tty, struct window_pane *wp, va_list ap)
{
struct screen *s = wp->screen;
u_int ua;
if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
!tty_term_has(tty->term, TTYC_CSR)) {
tty_redraw_region(tty, wp);
return;
}
ua = va_arg(ap, u_int);
tty_reset(tty);
tty_region(tty, s->old_rupper, s->old_rlower, wp->yoff);
tty_cursor(tty, s->old_cx, s->old_cy, wp->xoff, wp->yoff);
tty_emulate_repeat(tty, TTYC_DL, TTYC_DL1, ua);
}
void
tty_cmd_clearline(struct tty *tty, struct window_pane *wp, unused va_list ap)
{
struct screen *s = wp->screen;
u_int i;
tty_reset(tty);
tty_cursor(tty, 0, s->old_cy, wp->xoff, wp->yoff);
if (wp->xoff == 0 && screen_size_x(s) >= tty->sx &&
tty_term_has(tty->term, TTYC_EL)) {
tty_putcode(tty, TTYC_EL);
} else {
for (i = 0; i < screen_size_x(s); i++)
tty_putc(tty, ' ');
}
}
void
tty_cmd_clearendofline(
struct tty *tty, struct window_pane *wp, unused va_list ap)
{
struct screen *s = wp->screen;
u_int i;
tty_reset(tty);
tty_cursor(tty, s->old_cx, s->old_cy, wp->xoff, wp->yoff);
if (wp->xoff == 0 && screen_size_x(s) >= tty->sx &&
tty_term_has(tty->term, TTYC_EL))
tty_putcode(tty, TTYC_EL);
else {
for (i = s->old_cx; i < screen_size_x(s); i++)
tty_putc(tty, ' ');
}
}
void
tty_cmd_clearstartofline(
struct tty *tty, struct window_pane *wp, unused va_list ap)
{
struct screen *s = wp->screen;
u_int i;
tty_reset(tty);
if (wp->xoff == 0 && tty_term_has(tty->term, TTYC_EL1)) {
tty_cursor(tty, s->old_cx, s->old_cy, wp->xoff, wp->yoff);
tty_putcode(tty, TTYC_EL1);
} else {
tty_cursor(tty, 0, s->old_cy, wp->xoff, wp->yoff);
for (i = 0; i < s->old_cx + 1; i++)
tty_putc(tty, ' ');
}
}
void
tty_cmd_reverseindex(struct tty *tty, struct window_pane *wp, unused va_list ap)
{
struct screen *s = wp->screen;
if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
!tty_term_has(tty->term, TTYC_CSR)) {
tty_redraw_region(tty, wp);
return;
}
tty_reset(tty);
tty_region(tty, s->old_rupper, s->old_rlower, wp->yoff);
if (s->old_cy == s->old_rupper) {
tty_cursor(tty, s->old_cx, s->old_rupper, wp->xoff, wp->yoff);
tty_putcode(tty, TTYC_RI);
}
}
void
tty_cmd_linefeed(struct tty *tty, struct window_pane *wp, unused va_list ap)
{
struct screen *s = wp->screen;
if (wp->xoff != 0 || screen_size_x(s) < tty->sx ||
!tty_term_has(tty->term, TTYC_CSR)) {
tty_redraw_region(tty, wp);
return;
}
tty_reset(tty);
tty_region(tty, s->old_rupper, s->old_rlower, wp->yoff);
tty_cursor(tty, s->old_cx, s->old_cy, wp->xoff, wp->yoff);
tty_putc(tty, '\n');
tty->cy++;
}
void
tty_cmd_clearendofscreen(
struct tty *tty, struct window_pane *wp, unused va_list ap)
{
struct screen *s = wp->screen;
u_int i, j, oy;
oy = wp->yoff;
tty_reset(tty);
tty_cursor(tty, s->old_cx, s->old_cy, wp->xoff, wp->yoff);
tty_region(tty, 0, screen_size_y(s) - 1, wp->yoff);
if (wp->xoff == 0 && screen_size_x(s) >= tty->sx &&
tty_term_has(tty->term, TTYC_EL)) {
tty_putcode(tty, TTYC_EL);
if (s->old_cy != screen_size_y(s) - 1) {
tty_cursor(tty, 0, s->old_cy + 1, wp->xoff, wp->yoff);
for (i = s->old_cy + 1; i < screen_size_y(s); i++) {
tty_putcode(tty, TTYC_EL);
if (i == screen_size_y(s) - 1)
continue;
tty_emulate_repeat(tty, TTYC_CUD, TTYC_CUD1, 1);
tty->cy++;
}
}
} else {
for (i = s->old_cx; i < screen_size_x(s); i++)
tty_putc(tty, ' ');
for (j = s->old_cy; j < screen_size_y(s); j++) {
tty_cursor(tty, 0, j, wp->xoff, wp->yoff);
for (i = 0; i < screen_size_x(s); i++)
tty_putc(tty, ' ');
}
}
}
void
tty_cmd_clearstartofscreen(
struct tty *tty, struct window_pane *wp, unused va_list ap)
{
struct screen *s = wp->screen;
u_int i, j;
tty_reset(tty);
tty_cursor(tty, 0, 0, wp->xoff, wp->yoff);
tty_region(tty, 0, screen_size_y(s) - 1, wp->yoff);
if (wp->xoff == 0 && screen_size_x(s) >= tty->sx &&
tty_term_has(tty->term, TTYC_EL)) {
for (i = 0; i < s->old_cy; i++) {
tty_putcode(tty, TTYC_EL);
tty_emulate_repeat(tty, TTYC_CUD, TTYC_CUD1, 1);
tty->cy++;
}
} else {
for (j = 0; j < s->old_cy; j++) {
tty_cursor(tty, 0, j, wp->xoff, wp->yoff);
for (i = 0; i < screen_size_x(s); i++)
tty_putc(tty, ' ');
}
}
for (i = 0; i < s->old_cx; i++)
tty_putc(tty, ' ');
}
void
tty_cmd_clearscreen(
struct tty *tty, struct window_pane *wp, unused va_list ap)
{
struct screen *s = wp->screen;
u_int i, j;
tty_reset(tty);
tty_cursor(tty, 0, 0, wp->xoff, wp->yoff);
tty_region(tty, 0, screen_size_y(s) - 1, wp->yoff);
if (wp->xoff == 0 && screen_size_x(s) >= tty->sx &&
tty_term_has(tty->term, TTYC_EL)) {
for (i = 0; i < screen_size_y(s); i++) {
tty_putcode(tty, TTYC_EL);
if (i != screen_size_y(s) - 1) {
tty_emulate_repeat(tty, TTYC_CUD, TTYC_CUD1, 1);
tty->cy++;
}
}
} else {
for (j = 0; j < screen_size_y(s); j++) {
tty_cursor(tty, 0, j, wp->xoff, wp->yoff);
for (i = 0; i < screen_size_x(s); i++)
tty_putc(tty, ' ');
}
}
}
void
tty_cmd_cell(struct tty *tty, struct window_pane *wp, va_list ap)
{
struct screen *s = wp->screen;
struct grid_cell *gc;
struct grid_utf8 *gu;
gc = va_arg(ap, struct grid_cell *);
gu = va_arg(ap, struct grid_utf8 *);
tty_cursor(tty, s->old_cx, s->old_cy, wp->xoff, wp->yoff);
tty_cell(tty, gc, gu);
}
void
tty_cmd_raw(struct tty *tty, unused struct window_pane *wp, va_list ap)
{
u_char *buf;
size_t i, len;
buf = va_arg(ap, u_char *);
len = va_arg(ap, size_t);
for (i = 0; i < len; i++)
tty_putc(tty, buf[i]);
}
void
tty_cell(
struct tty *tty, const struct grid_cell *gc, const struct grid_utf8 *gu)
{
u_int i;
/* Skip last character if terminal is stupid. */
if (tty->term->flags & TERM_EARLYWRAP &&
tty->cy == tty->sy - 1 && tty->cx == tty->sx - 1)
return;
/* If this is a padding character, do nothing. */
if (gc->flags & GRID_FLAG_PADDING)
return;
/* Set the attributes. */
tty_attributes(tty, gc);
/* If not UTF-8, write directly. */
if (!(gc->flags & GRID_FLAG_UTF8)) {
if (gc->data < 0x20 || gc->data == 0x7f)
return;
tty_putc(tty, gc->data);
return;
}
/* If the terminal doesn't support UTF-8, write underscores. */
if (!(tty->flags & TTY_UTF8)) {
for (i = 0; i < gu->width; i++)
tty_putc(tty, '_');
return;
}
/* Otherwise, write UTF-8. */
for (i = 0; i < UTF8_SIZE; i++) {
if (gu->data[i] == 0xff)
break;
tty_putc(tty, gu->data[i]);
}
}
void
tty_reset(struct tty *tty)
{
struct grid_cell *gc = &tty->cell;
if (memcmp(gc, &grid_default_cell, sizeof *gc) == 0)
return;
if (tty_term_has(tty->term, TTYC_RMACS) && gc->attr & GRID_ATTR_CHARSET)
tty_putcode(tty, TTYC_RMACS);
tty_putcode(tty, TTYC_SGR0);
memcpy(gc, &grid_default_cell, sizeof *gc);
}
void
tty_region(struct tty *tty, u_int rupper, u_int rlower, u_int oy)
{
if (!tty_term_has(tty->term, TTYC_CSR))
return;
if (tty->rlower != oy + rlower || tty->rupper != oy + rupper) {
tty->rlower = oy + rlower;
tty->rupper = oy + rupper;
tty->cx = 0;
tty->cy = 0;
tty_putcode2(tty, TTYC_CSR, tty->rupper, tty->rlower);
}
}
void
tty_cursor(struct tty *tty, u_int cx, u_int cy, u_int ox, u_int oy)
{
if (ox + cx == 0 && tty->cx != 0 && tty->cy == oy + cy) {
tty->cx = 0;
tty_putc(tty, '\r');
} else if (tty->cx != ox + cx || tty->cy != oy + cy) {
tty->cx = ox + cx;
tty->cy = oy + cy;
tty_putcode2(tty, TTYC_CUP, tty->cy, tty->cx);
}
}
void
tty_attributes(struct tty *tty, const struct grid_cell *gc)
{
struct grid_cell *tc = &tty->cell;
u_char changed;
u_int fg, bg;
/* If any bits are being cleared, reset everything. */
if (tc->attr & ~gc->attr)
tty_reset(tty);
/* Filter out attribute bits already set. */
changed = gc->attr & ~tc->attr;
tc->attr = gc->attr;
/* Set the attributes. */
fg = gc->fg;
bg = gc->bg;
if (changed & GRID_ATTR_BRIGHT)
tty_putcode(tty, TTYC_BOLD);
if (changed & GRID_ATTR_DIM)
tty_putcode(tty, TTYC_DIM);
if (changed & GRID_ATTR_ITALICS)
tty_putcode(tty, TTYC_SMSO);
if (changed & GRID_ATTR_UNDERSCORE)
tty_putcode(tty, TTYC_SMUL);
if (changed & GRID_ATTR_BLINK)
tty_putcode(tty, TTYC_BLINK);
if (changed & GRID_ATTR_REVERSE) {
if (tty_term_has(tty->term, TTYC_REV))
tty_putcode(tty, TTYC_REV);
else if (tty_term_has(tty->term, TTYC_SMSO))
tty_putcode(tty, TTYC_SMSO);
}
if (changed & GRID_ATTR_HIDDEN)
tty_putcode(tty, TTYC_INVIS);
if (changed & GRID_ATTR_CHARSET)
tty_putcode(tty, TTYC_SMACS);
/* Set foreground colour. */
if (fg != tc->fg ||
(gc->flags & GRID_FLAG_FG256) != (tc->flags & GRID_FLAG_FG256)) {
tty_attributes_fg(tty, gc);
tc->fg = fg;
}
/* Set background colour. */
if (bg != tc->bg ||
(gc->flags & GRID_FLAG_BG256) != (tc->flags & GRID_FLAG_BG256)) {
tty_attributes_bg(tty, gc);
tc->bg = bg;
}
}
int
tty_try_256(struct tty *tty, u_char colour, const char *type)
{
char s[32];
if (!(tty->term->flags & TERM_256COLOURS) &&
!(tty->term_flags & TERM_256COLOURS))
return (-1);
xsnprintf(s, sizeof s, "\033[%s;5;%hhum", type, colour);
tty_puts(tty, s);
return (0);
}
int
tty_try_88(struct tty *tty, u_char colour, const char *type)
{
char s[32];
if (!(tty->term->flags & TERM_88COLOURS) &&
!(tty->term_flags & TERM_88COLOURS))
return (-1);
colour = colour_256to88(colour);
xsnprintf(s, sizeof s, "\033[%s;5;%hhum", type, colour);
tty_puts(tty, s);
return (0);
}
void
tty_attributes_fg(struct tty *tty, const struct grid_cell *gc)
{
u_char fg;
fg = gc->fg;
if (gc->flags & GRID_FLAG_FG256) {
if (tty_try_256(tty, fg, "38") == 0)
return;
if (tty_try_88(tty, fg, "38") == 0)
return;
fg = colour_256to16(fg);
if (fg & 8) {
fg &= 7;
tty_putcode(tty, TTYC_BOLD);
tty->cell.attr |= GRID_ATTR_BRIGHT;
} else if (tty->cell.attr & GRID_ATTR_BRIGHT)
tty_reset(tty);
}
if (fg == 8 &&
!(tty->term->flags & TERM_HASDEFAULTS) &&
!(tty->term_flags & TERM_HASDEFAULTS))
fg = 7;
if (fg == 8)
tty_puts(tty, "\033[39m");
else
tty_putcode1(tty, TTYC_SETAF, fg);
}
void
tty_attributes_bg(struct tty *tty, const struct grid_cell *gc)
{
u_char bg;
bg = gc->bg;
if (gc->flags & GRID_FLAG_BG256) {
if (tty_try_256(tty, bg, "48") == 0)
return;
if (tty_try_88(tty, bg, "48") == 0)
return;
bg = colour_256to16(bg);
if (bg & 8)
bg &= 7;
}
if (bg == 8 &&
!(tty->term->flags & TERM_HASDEFAULTS) &&
!(tty->term_flags & TERM_HASDEFAULTS))
bg = 0;
if (bg == 8)
tty_puts(tty, "\033[49m");
else
tty_putcode1(tty, TTYC_SETAB, bg);
}