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tmux/tty.c

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/* $OpenBSD$ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* 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 <netinet/in.h>
#include <curses.h>
#include <errno.h>
#include <fcntl.h>
#include <resolv.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "tmux.h"
static int tty_log_fd = -1;
static int tty_client_ready(struct client *, struct window_pane *);
static void tty_set_italics(struct tty *);
static int tty_try_colour(struct tty *, int, const char *);
static void tty_force_cursor_colour(struct tty *, const char *);
static void tty_cursor_pane(struct tty *, const struct tty_ctx *, u_int,
u_int);
static void tty_cursor_pane_unless_wrap(struct tty *,
const struct tty_ctx *, u_int, u_int);
static void tty_invalidate(struct tty *);
static void tty_colours(struct tty *, const struct grid_cell *);
static void tty_check_fg(struct tty *, const struct window_pane *,
struct grid_cell *);
static void tty_check_bg(struct tty *, const struct window_pane *,
struct grid_cell *);
static void tty_colours_fg(struct tty *, const struct grid_cell *);
static void tty_colours_bg(struct tty *, const struct grid_cell *);
static void tty_region_pane(struct tty *, const struct tty_ctx *, u_int,
u_int);
static void tty_region(struct tty *, u_int, u_int);
static void tty_margin_pane(struct tty *, const struct tty_ctx *);
static void tty_margin(struct tty *, u_int, u_int);
static int tty_large_region(struct tty *, const struct tty_ctx *);
static int tty_fake_bce(const struct tty *, const struct window_pane *,
u_int);
static void tty_redraw_region(struct tty *, const struct tty_ctx *);
static void tty_emulate_repeat(struct tty *, enum tty_code_code,
enum tty_code_code, u_int);
static void tty_repeat_space(struct tty *, u_int);
static void tty_cell(struct tty *, const struct grid_cell *,
const struct window_pane *);
static void tty_default_colours(struct grid_cell *,
const struct window_pane *);
static void tty_default_attributes(struct tty *, const struct window_pane *,
u_int);
#define tty_use_margin(tty) \
((tty)->term_type == TTY_VT420)
#define tty_pane_full_width(tty, ctx) \
((ctx)->xoff == 0 && screen_size_x((ctx)->wp->screen) >= (tty)->sx)
#define TTY_BLOCK_INTERVAL (100000 /* 100 milliseconds */)
#define TTY_BLOCK_START(tty) (1 + ((tty)->sx * (tty)->sy) * 8)
#define TTY_BLOCK_STOP(tty) (1 + ((tty)->sx * (tty)->sy) / 8)
void
tty_create_log(void)
{
char name[64];
xsnprintf(name, sizeof name, "tmux-out-%ld.log", (long)getpid());
tty_log_fd = open(name, O_WRONLY|O_CREAT|O_TRUNC, 0644);
if (tty_log_fd != -1 && fcntl(tty_log_fd, F_SETFD, FD_CLOEXEC) == -1)
fatal("fcntl failed");
}
int
tty_init(struct tty *tty, struct client *c, int fd, char *term)
{
if (!isatty(fd))
return (-1);
memset(tty, 0, sizeof *tty);
if (term == NULL || *term == '\0')
tty->term_name = xstrdup("unknown");
else
tty->term_name = xstrdup(term);
tty->fd = fd;
tty->client = c;
tty->cstyle = 0;
tty->ccolour = xstrdup("");
tty->flags = 0;
tty->term_flags = 0;
tty->term_type = TTY_UNKNOWN;
return (0);
}
void
tty_resize(struct tty *tty)
{
struct client *c = tty->client;
struct winsize ws;
u_int sx, sy;
if (ioctl(tty->fd, TIOCGWINSZ, &ws) != -1) {
sx = ws.ws_col;
if (sx == 0)
sx = 80;
sy = ws.ws_row;
if (sy == 0)
sy = 24;
} else {
sx = 80;
sy = 24;
}
log_debug("%s: %s now %ux%u", __func__, c->name, sx, sy);
tty_set_size(tty, sx, sy);
tty_invalidate(tty);
}
void
tty_set_size(struct tty *tty, u_int sx, u_int sy)
{
tty->sx = sx;
tty->sy = sy;
}
static void
tty_read_callback(__unused int fd, __unused short events, void *data)
{
struct tty *tty = data;
struct client *c = tty->client;
size_t size = EVBUFFER_LENGTH(tty->in);
int nread;
nread = evbuffer_read(tty->in, tty->fd, -1);
if (nread == 0 || nread == -1) {
event_del(&tty->event_in);
server_client_lost(tty->client);
return;
}
log_debug("%s: read %d bytes (already %zu)", c->name, nread, size);
while (tty_keys_next(tty))
;
}
static void
tty_timer_callback(__unused int fd, __unused short events, void *data)
{
struct tty *tty = data;
struct client *c = tty->client;
struct timeval tv = { .tv_usec = TTY_BLOCK_INTERVAL };
log_debug("%s: %zu discarded", c->name, tty->discarded);
c->flags |= CLIENT_REDRAW;
c->discarded += tty->discarded;
if (tty->discarded < TTY_BLOCK_STOP(tty)) {
tty->flags &= ~TTY_BLOCK;
tty_invalidate(tty);
return;
}
tty->discarded = 0;
evtimer_add(&tty->timer, &tv);
}
static int
tty_block_maybe(struct tty *tty)
{
struct client *c = tty->client;
size_t size = EVBUFFER_LENGTH(tty->out);
struct timeval tv = { .tv_usec = TTY_BLOCK_INTERVAL };
if (size < TTY_BLOCK_START(tty))
return (0);
if (tty->flags & TTY_BLOCK)
return (1);
tty->flags |= TTY_BLOCK;
log_debug("%s: can't keep up, %zu discarded", c->name, size);
evbuffer_drain(tty->out, size);
c->discarded += size;
tty->discarded = 0;
evtimer_add(&tty->timer, &tv);
return (1);
}
static void
tty_write_callback(__unused int fd, __unused short events, void *data)
{
struct tty *tty = data;
struct client *c = tty->client;
size_t size = EVBUFFER_LENGTH(tty->out);
int nwrite;
nwrite = evbuffer_write(tty->out, tty->fd);
if (nwrite == -1)
return;
log_debug("%s: wrote %d bytes (of %zu)", c->name, nwrite, size);
if (c->redraw > 0) {
if ((size_t)nwrite >= c->redraw)
c->redraw = 0;
else
c->redraw -= nwrite;
log_debug("%s: waiting for redraw, %zu bytes left", c->name,
c->redraw);
} else if (tty_block_maybe(tty))
return;
if (EVBUFFER_LENGTH(tty->out) != 0)
event_add(&tty->event_out, NULL);
}
int
tty_open(struct tty *tty, char **cause)
{
tty->term = tty_term_find(tty->term_name, tty->fd, cause);
if (tty->term == NULL) {
tty_close(tty);
return (-1);
}
tty->flags |= TTY_OPENED;
tty->flags &= ~(TTY_NOCURSOR|TTY_FREEZE|TTY_BLOCK|TTY_TIMER);
event_set(&tty->event_in, tty->fd, EV_PERSIST|EV_READ,
tty_read_callback, tty);
tty->in = evbuffer_new();
event_set(&tty->event_out, tty->fd, EV_WRITE, tty_write_callback, tty);
tty->out = evbuffer_new();
evtimer_set(&tty->timer, tty_timer_callback, tty);
tty_start_tty(tty);
tty_keys_build(tty);
return (0);
}
void
tty_start_tty(struct tty *tty)
{
struct client *c = tty->client;
struct termios tio;
if (tty->fd != -1 && tcgetattr(tty->fd, &tty->tio) == 0) {
setblocking(tty->fd, 0);
event_add(&tty->event_in, NULL);
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|ISIG);
tio.c_cc[VMIN] = 1;
tio.c_cc[VTIME] = 0;
if (tcsetattr(tty->fd, TCSANOW, &tio) == 0)
tcflush(tty->fd, TCIOFLUSH);
}
tty_putcode(tty, TTYC_SMCUP);
tty_putcode(tty, TTYC_SMKX);
tty_putcode(tty, TTYC_CLEAR);
if (tty_acs_needed(tty)) {
log_debug("%s: using capabilities for ACS", c->name);
tty_putcode(tty, TTYC_ENACS);
} else
log_debug("%s: using UTF-8 for ACS", c->name);
tty_putcode(tty, TTYC_CNORM);
if (tty_term_has(tty->term, TTYC_KMOUS))
tty_puts(tty, "\033[?1000l\033[?1002l\033[?1006l\033[?1005l");
if (tty_term_flag(tty->term, TTYC_XT)) {
if (options_get_number(global_options, "focus-events")) {
tty->flags |= TTY_FOCUS;
tty_puts(tty, "\033[?1004h");
}
tty_puts(tty, "\033[c");
}
tty->flags |= TTY_STARTED;
tty_invalidate(tty);
tty_force_cursor_colour(tty, "");
tty->mouse_drag_flag = 0;
tty->mouse_drag_update = NULL;
tty->mouse_drag_release = NULL;
}
void
tty_stop_tty(struct tty *tty)
{
struct winsize ws;
if (!(tty->flags & TTY_STARTED))
return;
tty->flags &= ~TTY_STARTED;
event_del(&tty->timer);
tty->flags &= ~TTY_BLOCK;
event_del(&tty->event_in);
event_del(&tty->event_out);
/*
* 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));
if (tty_acs_needed(tty))
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_RMKX));
tty_raw(tty, tty_term_string(tty->term, TTYC_CLEAR));
if (tty_term_has(tty->term, TTYC_SS) && tty->cstyle != 0) {
if (tty_term_has(tty->term, TTYC_SE))
tty_raw(tty, tty_term_string(tty->term, TTYC_SE));
else
tty_raw(tty, tty_term_string1(tty->term, TTYC_SS, 0));
}
if (tty->mode & MODE_BRACKETPASTE)
tty_raw(tty, "\033[?2004l");
tty_raw(tty, tty_term_string(tty->term, TTYC_CR));
tty_raw(tty, tty_term_string(tty->term, TTYC_CNORM));
if (tty_term_has(tty->term, TTYC_KMOUS))
tty_raw(tty, "\033[?1000l\033[?1002l\033[?1006l\033[?1005l");
if (tty_term_flag(tty->term, TTYC_XT)) {
if (tty->flags & TTY_FOCUS) {
tty->flags &= ~TTY_FOCUS;
tty_raw(tty, "\033[?1004l");
}
}
if (tty_use_margin(tty))
tty_raw(tty, "\033[?69l"); /* DECLRMM */
tty_raw(tty, tty_term_string(tty->term, TTYC_RMCUP));
setblocking(tty->fd, 1);
}
void
tty_close(struct tty *tty)
{
if (event_initialized(&tty->key_timer))
evtimer_del(&tty->key_timer);
tty_stop_tty(tty);
if (tty->flags & TTY_OPENED) {
evbuffer_free(tty->in);
event_del(&tty->event_in);
evbuffer_free(tty->out);
event_del(&tty->event_out);
tty_term_free(tty->term);
tty_keys_free(tty);
tty->flags &= ~TTY_OPENED;
}
if (tty->fd != -1) {
close(tty->fd);
tty->fd = -1;
}
}
void
tty_free(struct tty *tty)
{
tty_close(tty);
free(tty->ccolour);
free(tty->term_name);
}
void
tty_set_type(struct tty *tty, int type)
{
tty->term_type = type;
if (tty_use_margin(tty))
tty_puts(tty, "\033[?69h"); /* DECLRMM */
}
void
tty_raw(struct tty *tty, const char *s)
{
ssize_t n, slen;
u_int i;
slen = strlen(s);
for (i = 0; i < 5; i++) {
n = write(tty->fd, s, slen);
if (n >= 0) {
s += n;
slen -= n;
if (slen == 0)
break;
} else if (n == -1 && errno != EAGAIN)
break;
usleep(100);
}
}
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_putcode3(struct tty *tty, enum tty_code_code code, int a, int b, int c)
{
if (a < 0 || b < 0 || c < 0)
return;
tty_puts(tty, tty_term_string3(tty->term, code, a, b, c));
}
void
tty_putcode_ptr1(struct tty *tty, enum tty_code_code code, const void *a)
{
if (a != NULL)
tty_puts(tty, tty_term_ptr1(tty->term, code, a));
}
void
tty_putcode_ptr2(struct tty *tty, enum tty_code_code code, const void *a,
const void *b)
{
if (a != NULL && b != NULL)
tty_puts(tty, tty_term_ptr2(tty->term, code, a, b));
}
static void
tty_add(struct tty *tty, const char *buf, size_t len)
{
struct client *c = tty->client;
if (tty->flags & TTY_BLOCK) {
tty->discarded += len;
return;
}
evbuffer_add(tty->out, buf, len);
log_debug("%s: %.*s", c->name, (int)len, buf);
c->written += len;
if (tty_log_fd != -1)
write(tty_log_fd, buf, len);
if (tty->flags & TTY_STARTED)
event_add(&tty->event_out, NULL);
}
void
tty_puts(struct tty *tty, const char *s)
{
if (*s != '\0')
tty_add(tty, s, strlen(s));
}
void
tty_putc(struct tty *tty, u_char ch)
{
const char *acs;
if (tty->cell.attr & GRID_ATTR_CHARSET) {
acs = tty_acs_get(tty, ch);
if (acs != NULL)
tty_add(tty, acs, strlen(acs));
else
tty_add(tty, &ch, 1);
} else
tty_add(tty, &ch, 1);
if (ch >= 0x20 && ch != 0x7f) {
if (tty->cx >= tty->sx) {
tty->cx = 1;
if (tty->cy != tty->rlower)
tty->cy++;
/*
* On !xenl terminals, force the cursor position to
* where we think it should be after a line wrap - this
* means it works on sensible terminals as well.
*/
if (tty->term->flags & TERM_EARLYWRAP)
tty_putcode2(tty, TTYC_CUP, tty->cy, tty->cx);
} else
tty->cx++;
}
}
void
tty_putn(struct tty *tty, const void *buf, size_t len, u_int width)
{
tty_add(tty, buf, len);
if (tty->cx + width > tty->sx) {
tty->cx = (tty->cx + width) - tty->sx;
if (tty->cx <= tty->sx)
tty->cy++;
else
tty->cx = tty->cy = UINT_MAX;
} else
tty->cx += width;
}
static void
tty_set_italics(struct tty *tty)
{
const char *s;
if (tty_term_has(tty->term, TTYC_SITM)) {
s = options_get_string(global_options, "default-terminal");
if (strcmp(s, "screen") != 0 && strncmp(s, "screen-", 7) != 0) {
tty_putcode(tty, TTYC_SITM);
return;
}
}
tty_putcode(tty, TTYC_SMSO);
}
void
tty_set_title(struct tty *tty, const char *title)
{
if (!tty_term_has(tty->term, TTYC_TSL) ||
!tty_term_has(tty->term, TTYC_FSL))
return;
tty_putcode(tty, TTYC_TSL);
tty_puts(tty, title);
tty_putcode(tty, TTYC_FSL);
}
static void
tty_force_cursor_colour(struct tty *tty, const char *ccolour)
{
if (*ccolour == '\0')
tty_putcode(tty, TTYC_CR);
else
tty_putcode_ptr1(tty, TTYC_CS, ccolour);
free(tty->ccolour);
tty->ccolour = xstrdup(ccolour);
}
void
tty_update_mode(struct tty *tty, int mode, struct screen *s)
{
int changed;
if (s != NULL && strcmp(s->ccolour, tty->ccolour) != 0)
tty_force_cursor_colour(tty, s->ccolour);
if (tty->flags & TTY_NOCURSOR)
mode &= ~MODE_CURSOR;
changed = mode ^ tty->mode;
if (changed & MODE_BLINKING) {
if (tty_term_has(tty->term, TTYC_CVVIS))
tty_putcode(tty, TTYC_CVVIS);
else
tty_putcode(tty, TTYC_CNORM);
changed |= MODE_CURSOR;
}
if (changed & MODE_CURSOR) {
if (mode & MODE_CURSOR)
tty_putcode(tty, TTYC_CNORM);
else
tty_putcode(tty, TTYC_CIVIS);
}
if (s != NULL && tty->cstyle != s->cstyle) {
if (tty_term_has(tty->term, TTYC_SS)) {
if (s->cstyle == 0 &&
tty_term_has(tty->term, TTYC_SE))
tty_putcode(tty, TTYC_SE);
else
tty_putcode1(tty, TTYC_SS, s->cstyle);
}
tty->cstyle = s->cstyle;
}
if (changed & ALL_MOUSE_MODES) {
if (mode & ALL_MOUSE_MODES) {
/*
* Enable the SGR (1006) extension unconditionally, as
* it is safe from misinterpretation.
*/
tty_puts(tty, "\033[?1006h");
if (mode & MODE_MOUSE_ALL)
tty_puts(tty, "\033[?1003h");
else if (mode & MODE_MOUSE_BUTTON)
tty_puts(tty, "\033[?1002h");
else if (mode & MODE_MOUSE_STANDARD)
tty_puts(tty, "\033[?1000h");
} else {
if (tty->mode & MODE_MOUSE_ALL)
tty_puts(tty, "\033[?1003l");
else if (tty->mode & MODE_MOUSE_BUTTON)
tty_puts(tty, "\033[?1002l");
else if (tty->mode & MODE_MOUSE_STANDARD)
tty_puts(tty, "\033[?1000l");
tty_puts(tty, "\033[?1006l");
}
}
if (changed & MODE_BRACKETPASTE) {
if (mode & MODE_BRACKETPASTE)
tty_puts(tty, "\033[?2004h");
else
tty_puts(tty, "\033[?2004l");
}
tty->mode = mode;
}
static 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);
}
}
static void
tty_repeat_space(struct tty *tty, u_int n)
{
static char s[500];
if (*s != ' ')
memset(s, ' ', sizeof s);
while (n > sizeof s) {
tty_putn(tty, s, sizeof s, sizeof s);
n -= sizeof s;
}
if (n != 0)
tty_putn(tty, s, n, n);
}
/*
* Is the region large enough to be worth redrawing once later rather than
* probably several times now? Currently yes if it is more than 50% of the
* pane.
*/
static int
tty_large_region(__unused struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
return (ctx->orlower - ctx->orupper >= screen_size_y(wp->screen) / 2);
}
/*
* Return if BCE is needed but the terminal doesn't have it - it'll need to be
* emulated.
*/
static int
tty_fake_bce(const struct tty *tty, const struct window_pane *wp, u_int bg)
{
struct grid_cell gc;
if (tty_term_flag(tty->term, TTYC_BCE))
return (0);
memcpy(&gc, &grid_default_cell, sizeof gc);
if (wp != NULL)
tty_default_colours(&gc, wp);
if (bg != 8 || gc.bg != 8)
return (1);
return (0);
}
/*
* 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.
*/
static void
tty_redraw_region(struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
struct screen *s = wp->screen;
u_int i;
/*
* If region is large, schedule a window redraw. In most cases this is
* likely to be followed by some more scrolling.
*/
if (tty_large_region(tty, ctx)) {
wp->flags |= PANE_REDRAW;
return;
}
if (ctx->ocy < ctx->orupper || ctx->ocy > ctx->orlower) {
for (i = ctx->ocy; i < screen_size_y(s); i++)
tty_draw_pane(tty, wp, i, ctx->xoff, ctx->yoff);
} else {
for (i = ctx->orupper; i <= ctx->orlower; i++)
tty_draw_pane(tty, wp, i, ctx->xoff, ctx->yoff);
}
}
static void
tty_clear_line(struct tty *tty, const struct window_pane *wp, u_int py,
u_int px, u_int nx, u_int bg)
{
log_debug("%s: %u at %u,%u", __func__, nx, px, py);
/* Nothing to clear. */
if (nx == 0)
return;
/* If genuine BCE is available, can try escape sequences. */
if (!tty_fake_bce(tty, wp, bg)) {
/* Off the end of the line, use EL if available. */
if (px + nx >= tty->sx && tty_term_has(tty->term, TTYC_EL)) {
tty_cursor(tty, px, py);
tty_putcode(tty, TTYC_EL);
return;
}
/* At the start of the line. Use EL1. */
if (px == 0 && tty_term_has(tty->term, TTYC_EL1)) {
tty_cursor(tty, px + nx - 1, py);
tty_putcode(tty, TTYC_EL1);
return;
}
/* Section of line. Use ECH if possible. */
if (tty_term_has(tty->term, TTYC_ECH)) {
tty_cursor(tty, px, py);
tty_putcode1(tty, TTYC_ECH, nx);
return;
}
}
/* Couldn't use an escape sequence, use spaces. */
tty_cursor(tty, px, py);
tty_repeat_space(tty, nx);
}
static void
tty_clear_area(struct tty *tty, const struct window_pane *wp, u_int py,
u_int ny, u_int px, u_int nx, u_int bg)
{
u_int yy;
char tmp[64];
log_debug("%s: %u,%u at %u,%u", __func__, nx, ny, px, py);
/* Nothing to clear. */
if (nx == 0 || ny == 0)
return;
/* If genuine BCE is available, can try escape sequences. */
if (!tty_fake_bce(tty, wp, bg)) {
/* Use ED if clearing off the bottom of the terminal. */
if (px == 0 &&
px + nx >= tty->sx &&
py + ny >= tty->sy &&
tty_term_has(tty->term, TTYC_ED)) {
tty_cursor(tty, 0, py);
tty_putcode(tty, TTYC_ED);
return;
}
/*
* On VT420 compatible terminals we can use DECFRA if the
* background colour isn't default (because it doesn't work
* after SGR 0).
*/
if (tty->term_type == TTY_VT420 && bg != 8) {
xsnprintf(tmp, sizeof tmp, "\033[32;%u;%u;%u;%u$x",
py + 1, px + 1, py + ny, px + nx);
tty_puts(tty, tmp);
return;
}
/* Full lines can be scrolled away to clear them. */
if (px == 0 &&
px + nx >= tty->sx &&
ny > 2 &&
tty_term_has(tty->term, TTYC_CSR) &&
tty_term_has(tty->term, TTYC_INDN)) {
tty_region(tty, py, py + ny - 1);
tty_margin_off(tty);
tty_putcode1(tty, TTYC_INDN, ny);
return;
}
/*
* If margins are supported, can just scroll the area off to
* clear it.
*/
if (nx > 2 &&
ny > 2 &&
tty_term_has(tty->term, TTYC_CSR) &&
tty_use_margin(tty) &&
tty_term_has(tty->term, TTYC_INDN)) {
tty_region(tty, py, py + ny - 1);
tty_margin(tty, px, px + nx - 1);
tty_putcode1(tty, TTYC_INDN, ny);
return;
}
}
/* Couldn't use an escape sequence, loop over the lines. */
for (yy = py; yy < py + ny; yy++)
tty_clear_line(tty, wp, yy, px, nx, bg);
}
void
tty_draw_pane(struct tty *tty, const struct window_pane *wp, u_int py, u_int ox,
u_int oy)
{
tty_draw_line(tty, wp, wp->screen, py, ox, oy);
}
static const struct grid_cell *
tty_check_codeset(struct tty *tty, const struct grid_cell *gc)
{
static struct grid_cell new;
u_int n;
/* Characters less than 0x7f are always fine, no matter what. */
if (gc->data.size == 1 && *gc->data.data < 0x7f)
return (gc);
/* UTF-8 terminal and a UTF-8 character - fine. */
if (tty->flags & TTY_UTF8)
return (gc);
/* Replace by the right number of underscores. */
n = gc->data.width;
if (n > UTF8_SIZE)
n = UTF8_SIZE;
memcpy(&new, gc, sizeof new);
new.data.size = n;
memset(new.data.data, '_', n);
return (&new);
}
void
tty_draw_line(struct tty *tty, const struct window_pane *wp,
struct screen *s, u_int py, u_int ox, u_int oy)
{
struct grid *gd = s->grid;
struct grid_cell gc, last;
const struct grid_cell *gcp;
u_int i, j, ux, sx, nx, width;
int flags, cleared = 0;
char buf[512];
size_t len, old_len;
flags = (tty->flags & TTY_NOCURSOR);
tty->flags |= TTY_NOCURSOR;
tty_update_mode(tty, tty->mode, s);
tty_region_off(tty);
tty_margin_off(tty);
/*
* Clamp the width to cellsize - note this is not cellused, because
* there may be empty background cells after it (from BCE).
*/
sx = screen_size_x(s);
if (sx > gd->linedata[gd->hsize + py].cellsize)
sx = gd->linedata[gd->hsize + py].cellsize;
if (sx > tty->sx)
sx = tty->sx;
ux = 0;
if (wp == NULL ||
py == 0 ||
(~gd->linedata[gd->hsize + py - 1].flags & GRID_LINE_WRAPPED) ||
ox != 0 ||
tty->cx < tty->sx ||
screen_size_x(s) < tty->sx) {
if (screen_size_x(s) < tty->sx &&
ox == 0 &&
sx != screen_size_x(s) &&
tty_term_has(tty->term, TTYC_EL1) &&
!tty_fake_bce(tty, wp, 8)) {
tty_default_attributes(tty, wp, 8);
tty_cursor(tty, screen_size_x(s) - 1, oy + py);
tty_putcode(tty, TTYC_EL1);
cleared = 1;
}
if (sx != 0)
tty_cursor(tty, ox, oy + py);
} else
log_debug("%s: wrapped line %u", __func__, oy + py);
memcpy(&last, &grid_default_cell, sizeof last);
len = 0;
width = 0;
for (i = 0; i < sx; i++) {
grid_view_get_cell(gd, i, py, &gc);
gcp = tty_check_codeset(tty, &gc);
if (len != 0 &&
((gcp->attr & GRID_ATTR_CHARSET) ||
gcp->flags != last.flags ||
gcp->attr != last.attr ||
gcp->fg != last.fg ||
gcp->bg != last.bg ||
ux + width + gcp->data.width >= screen_size_x(s) ||
(sizeof buf) - len < gcp->data.size)) {
tty_attributes(tty, &last, wp);
tty_putn(tty, buf, len, width);
ux += width;
len = 0;
width = 0;
}
if (gcp->flags & GRID_FLAG_SELECTED)
screen_select_cell(s, &last, gcp);
else
memcpy(&last, gcp, sizeof last);
if (ux + gcp->data.width > screen_size_x(s)) {
tty_attributes(tty, &last, wp);
for (j = 0; j < gcp->data.width; j++) {
if (ux + j > screen_size_x(s))
break;
tty_putc(tty, ' ');
ux++;
}
} else if (gcp->attr & GRID_ATTR_CHARSET) {
tty_attributes(tty, &last, wp);
for (j = 0; j < gcp->data.size; j++)
tty_putc(tty, gcp->data.data[j]);
ux += gc.data.width;
} else {
memcpy(buf + len, gcp->data.data, gcp->data.size);
len += gcp->data.size;
width += gcp->data.width;
}
}
if (len != 0) {
if (grid_cells_equal(&last, &grid_default_cell)) {
old_len = len;
while (len > 0 && buf[len - 1] == ' ') {
len--;
width--;
}
log_debug("%s: trimmed %zu spaces", __func__,
old_len - len);
}
if (len != 0) {
tty_attributes(tty, &last, wp);
tty_putn(tty, buf, len, width);
ux += width;
}
}
if (!cleared && ux < screen_size_x(s)) {
nx = screen_size_x(s) - ux;
tty_default_attributes(tty, wp, 8);
tty_clear_line(tty, wp, oy + py, ox + ux, nx, 8);
}
tty->flags = (tty->flags & ~TTY_NOCURSOR) | flags;
tty_update_mode(tty, tty->mode, s);
}
static int
tty_client_ready(struct client *c, struct window_pane *wp)
{
if (c->session == NULL || c->tty.term == NULL)
return (0);
if (c->flags & (CLIENT_REDRAW|CLIENT_SUSPENDED))
return (0);
if (c->tty.flags & TTY_FREEZE)
return (0);
if (c->session->curw->window != wp->window)
return (0);
return (1);
}
void
tty_write(void (*cmdfn)(struct tty *, const struct tty_ctx *),
struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
struct client *c;
/* wp can be NULL if updating the screen but not the terminal. */
if (wp == NULL)
return;
if ((wp->flags & (PANE_REDRAW|PANE_DROP)) || !window_pane_visible(wp))
return;
TAILQ_FOREACH(c, &clients, entry) {
if (!tty_client_ready(c, wp))
continue;
ctx->xoff = wp->xoff;
ctx->yoff = wp->yoff;
if (status_at_line(c) == 0)
ctx->yoff += status_line_size(c->session);
cmdfn(&c->tty, ctx);
}
}
void
tty_cmd_insertcharacter(struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
if (!tty_pane_full_width(tty, ctx) ||
tty_fake_bce(tty, wp, ctx->bg) ||
(!tty_term_has(tty->term, TTYC_ICH) &&
!tty_term_has(tty->term, TTYC_ICH1))) {
tty_draw_pane(tty, wp, ctx->ocy, ctx->xoff, ctx->yoff);
return;
}
tty_default_attributes(tty, wp, ctx->bg);
tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
tty_emulate_repeat(tty, TTYC_ICH, TTYC_ICH1, ctx->num);
}
void
tty_cmd_deletecharacter(struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
if (!tty_pane_full_width(tty, ctx) ||
tty_fake_bce(tty, wp, ctx->bg) ||
(!tty_term_has(tty->term, TTYC_DCH) &&
!tty_term_has(tty->term, TTYC_DCH1))) {
tty_draw_pane(tty, wp, ctx->ocy, ctx->xoff, ctx->yoff);
return;
}
tty_default_attributes(tty, wp, ctx->bg);
tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
tty_emulate_repeat(tty, TTYC_DCH, TTYC_DCH1, ctx->num);
}
void
tty_cmd_clearcharacter(struct tty *tty, const struct tty_ctx *ctx)
{
tty_default_attributes(tty, ctx->wp, ctx->bg);
tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
if (tty_term_has(tty->term, TTYC_ECH) &&
!tty_fake_bce(tty, ctx->wp, 8))
tty_putcode1(tty, TTYC_ECH, ctx->num);
else
tty_repeat_space(tty, ctx->num);
}
void
tty_cmd_insertline(struct tty *tty, const struct tty_ctx *ctx)
{
if (!tty_pane_full_width(tty, ctx) ||
tty_fake_bce(tty, ctx->wp, ctx->bg) ||
!tty_term_has(tty->term, TTYC_CSR) ||
!tty_term_has(tty->term, TTYC_IL1)) {
tty_redraw_region(tty, ctx);
return;
}
tty_default_attributes(tty, ctx->wp, ctx->bg);
tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
tty_margin_off(tty);
tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
tty_emulate_repeat(tty, TTYC_IL, TTYC_IL1, ctx->num);
tty->cx = tty->cy = UINT_MAX;
}
void
tty_cmd_deleteline(struct tty *tty, const struct tty_ctx *ctx)
{
if (!tty_pane_full_width(tty, ctx) ||
tty_fake_bce(tty, ctx->wp, ctx->bg) ||
!tty_term_has(tty->term, TTYC_CSR) ||
!tty_term_has(tty->term, TTYC_DL1)) {
tty_redraw_region(tty, ctx);
return;
}
tty_default_attributes(tty, ctx->wp, ctx->bg);
tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
tty_margin_off(tty);
tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
tty_emulate_repeat(tty, TTYC_DL, TTYC_DL1, ctx->num);
tty->cx = tty->cy = UINT_MAX;
}
void
tty_cmd_clearline(struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
u_int nx, py = ctx->yoff + ctx->ocy;
tty_default_attributes(tty, wp, ctx->bg);
nx = screen_size_x(wp->screen);
tty_clear_line(tty, wp, py, ctx->xoff, nx, ctx->bg);
}
void
tty_cmd_clearendofline(struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
u_int nx, py = ctx->yoff + ctx->ocy;
tty_default_attributes(tty, wp, ctx->bg);
nx = screen_size_x(wp->screen) - ctx->ocx;
tty_clear_line(tty, wp, py, ctx->xoff + ctx->ocx, nx, ctx->bg);
}
void
tty_cmd_clearstartofline(struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
u_int py = ctx->yoff + ctx->ocy;
tty_default_attributes(tty, wp, ctx->bg);
tty_clear_line(tty, wp, py, ctx->xoff, ctx->ocx + 1, ctx->bg);
}
void
tty_cmd_reverseindex(struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
if (ctx->ocy != ctx->orupper)
return;
if (!tty_pane_full_width(tty, ctx) ||
tty_fake_bce(tty, wp, 8) ||
!tty_term_has(tty->term, TTYC_CSR) ||
!tty_term_has(tty->term, TTYC_RI)) {
tty_redraw_region(tty, ctx);
return;
}
tty_default_attributes(tty, wp, ctx->bg);
tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
tty_margin_off(tty);
tty_cursor_pane(tty, ctx, ctx->ocx, ctx->orupper);
tty_putcode(tty, TTYC_RI);
}
void
tty_cmd_linefeed(struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
if (ctx->ocy != ctx->orlower)
return;
if ((!tty_pane_full_width(tty, ctx) && !tty_use_margin(tty)) ||
tty_fake_bce(tty, wp, 8) ||
!tty_term_has(tty->term, TTYC_CSR)) {
tty_redraw_region(tty, ctx);
return;
}
tty_default_attributes(tty, wp, ctx->bg);
tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
tty_margin_pane(tty, ctx);
/*
* If we want to wrap a pane while using margins, the cursor needs to
* be exactly on the right of the region. If the cursor is entirely off
* the edge - move it back to the right. Some terminals are funny about
* this and insert extra spaces, so only use the right if margins are
* enabled.
*/
if (ctx->xoff + ctx->ocx > tty->rright) {
if (!tty_use_margin(tty))
tty_cursor(tty, 0, ctx->yoff + ctx->ocy);
else
tty_cursor(tty, tty->rright, ctx->yoff + ctx->ocy);
} else
tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);
tty_putc(tty, '\n');
}
void
tty_cmd_scrollup(struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
u_int i;
if ((!tty_pane_full_width(tty, ctx) && !tty_use_margin(tty)) ||
tty_fake_bce(tty, wp, 8) ||
!tty_term_has(tty->term, TTYC_CSR)) {
tty_redraw_region(tty, ctx);
return;
}
tty_default_attributes(tty, wp, ctx->bg);
tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
tty_margin_pane(tty, ctx);
if (ctx->num == 1 || !tty_term_has(tty->term, TTYC_INDN)) {
if (!tty_use_margin(tty))
tty_cursor(tty, 0, tty->rlower);
else
tty_cursor(tty, tty->rright, tty->rlower);
for (i = 0; i < ctx->num; i++)
tty_putc(tty, '\n');
} else {
tty_cursor(tty, 0, tty->cy);
tty_putcode1(tty, TTYC_INDN, ctx->num);
}
}
void
tty_cmd_clearendofscreen(struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
u_int px, py, nx, ny;
tty_default_attributes(tty, wp, ctx->bg);
tty_region_pane(tty, ctx, 0, screen_size_y(wp->screen) - 1);
tty_margin_off(tty);
px = ctx->xoff;
nx = screen_size_x(wp->screen);
py = ctx->yoff + ctx->ocy + 1;
ny = screen_size_y(wp->screen) - ctx->ocy - 1;
tty_clear_area(tty, wp, py, ny, px, nx, ctx->bg);
px = ctx->xoff + ctx->ocx;
nx = screen_size_x(wp->screen) - ctx->ocx;
py = ctx->yoff + ctx->ocy;
tty_clear_line(tty, wp, py, px, nx, ctx->bg);
}
void
tty_cmd_clearstartofscreen(struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
u_int px, py, nx, ny;
tty_default_attributes(tty, wp, ctx->bg);
tty_region_pane(tty, ctx, 0, screen_size_y(wp->screen) - 1);
tty_margin_off(tty);
px = ctx->xoff;
nx = screen_size_x(wp->screen);
py = ctx->yoff;
ny = ctx->ocy - 1;
tty_clear_area(tty, wp, py, ny, px, nx, ctx->bg);
px = ctx->xoff;
nx = ctx->ocx + 1;
py = ctx->yoff + ctx->ocy;
tty_clear_line(tty, wp, py, px, nx, ctx->bg);
}
void
tty_cmd_clearscreen(struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
u_int px, py, nx, ny;
tty_default_attributes(tty, wp, ctx->bg);
tty_region_pane(tty, ctx, 0, screen_size_y(wp->screen) - 1);
tty_margin_off(tty);
px = ctx->xoff;
nx = screen_size_x(wp->screen);
py = ctx->yoff;
ny = screen_size_y(wp->screen);
tty_clear_area(tty, wp, py, ny, px, nx, ctx->bg);
}
void
tty_cmd_alignmenttest(struct tty *tty, const struct tty_ctx *ctx)
{
struct window_pane *wp = ctx->wp;
struct screen *s = wp->screen;
u_int i, j;
tty_attributes(tty, &grid_default_cell, wp);
tty_region_pane(tty, ctx, 0, screen_size_y(s) - 1);
tty_margin_off(tty);
for (j = 0; j < screen_size_y(s); j++) {
tty_cursor_pane(tty, ctx, 0, j);
for (i = 0; i < screen_size_x(s); i++)
tty_putc(tty, 'E');
}
}
void
tty_cmd_cell(struct tty *tty, const struct tty_ctx *ctx)
{
if (ctx->xoff + ctx->ocx > tty->sx - 1 && ctx->ocy == ctx->orlower) {
if (tty_pane_full_width(tty, ctx))
tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower);
else
tty_margin_off(tty);
}
tty_cursor_pane_unless_wrap(tty, ctx, ctx->ocx, ctx->ocy);
tty_cell(tty, ctx->cell, ctx->wp);
}
void
tty_cmd_cells(struct tty *tty, const struct tty_ctx *ctx)
{
tty_cursor_pane_unless_wrap(tty, ctx, ctx->ocx, ctx->ocy);
tty_attributes(tty, ctx->cell, ctx->wp);
tty_putn(tty, ctx->ptr, ctx->num, ctx->num);
}
void
tty_cmd_setselection(struct tty *tty, const struct tty_ctx *ctx)
{
char *buf;
size_t off;
if (!tty_term_has(tty->term, TTYC_MS))
return;
off = 4 * ((ctx->num + 2) / 3) + 1; /* storage for base64 */
buf = xmalloc(off);
b64_ntop(ctx->ptr, ctx->num, buf, off);
tty_putcode_ptr2(tty, TTYC_MS, "", buf);
free(buf);
}
void
tty_cmd_rawstring(struct tty *tty, const struct tty_ctx *ctx)
{
tty_add(tty, ctx->ptr, ctx->num);
tty_invalidate(tty);
}
static void
tty_cell(struct tty *tty, const struct grid_cell *gc,
const struct window_pane *wp)
{
const struct grid_cell *gcp;
/* 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, wp);
/* Get the cell and if ASCII write with putc to do ACS translation. */
gcp = tty_check_codeset(tty, gc);
if (gcp->data.size == 1) {
if (*gcp->data.data < 0x20 || *gcp->data.data == 0x7f)
return;
tty_putc(tty, *gcp->data.data);
return;
}
/* Write the data. */
tty_putn(tty, gcp->data.data, gcp->data.size, gcp->data.width);
}
void
tty_reset(struct tty *tty)
{
struct grid_cell *gc = &tty->cell;
if (!grid_cells_equal(gc, &grid_default_cell)) {
if ((gc->attr & GRID_ATTR_CHARSET) && tty_acs_needed(tty))
tty_putcode(tty, TTYC_RMACS);
tty_putcode(tty, TTYC_SGR0);
memcpy(gc, &grid_default_cell, sizeof *gc);
}
memcpy(&tty->last_cell, &grid_default_cell, sizeof tty->last_cell);
tty->last_wp = -1;
}
static void
tty_invalidate(struct tty *tty)
{
memcpy(&tty->cell, &grid_default_cell, sizeof tty->cell);
memcpy(&tty->last_cell, &grid_default_cell, sizeof tty->last_cell);
tty->last_wp = -1;
tty->cx = tty->cy = UINT_MAX;
tty->rupper = tty->rleft = UINT_MAX;
tty->rlower = tty->rright = UINT_MAX;
if (tty->flags & TTY_STARTED) {
tty_putcode(tty, TTYC_SGR0);
tty->mode = ALL_MODES;
tty_update_mode(tty, MODE_CURSOR, NULL);
tty_cursor(tty, 0, 0);
tty_region_off(tty);
tty_margin_off(tty);
} else
tty->mode = MODE_CURSOR;
}
/* Turn off margin. */
void
tty_region_off(struct tty *tty)
{
tty_region(tty, 0, tty->sy - 1);
}
/* Set region inside pane. */
static void
tty_region_pane(struct tty *tty, const struct tty_ctx *ctx, u_int rupper,
u_int rlower)
{
tty_region(tty, ctx->yoff + rupper, ctx->yoff + rlower);
}
/* Set region at absolute position. */
static void
tty_region(struct tty *tty, u_int rupper, u_int rlower)
{
if (tty->rlower == rlower && tty->rupper == rupper)
return;
if (!tty_term_has(tty->term, TTYC_CSR))
return;
tty->rupper = rupper;
tty->rlower = rlower;
/*
* Some terminals (such as PuTTY) do not correctly reset the cursor to
* 0,0 if it is beyond the last column (they do not reset their wrap
* flag so further output causes a line feed). As a workaround, do an
* explicit move to 0 first.
*/
if (tty->cx >= tty->sx)
tty_cursor(tty, 0, tty->cy);
tty_putcode2(tty, TTYC_CSR, tty->rupper, tty->rlower);
tty->cx = tty->cy = UINT_MAX;
}
/* Turn off margin. */
void
tty_margin_off(struct tty *tty)
{
tty_margin(tty, 0, tty->sx - 1);
}
/* Set margin inside pane. */
static void
tty_margin_pane(struct tty *tty, const struct tty_ctx *ctx)
{
tty_margin(tty, ctx->xoff, ctx->xoff + ctx->wp->sx - 1);
}
/* Set margin at absolute position. */
static void
tty_margin(struct tty *tty, u_int rleft, u_int rright)
{
char s[64];
if (!tty_use_margin(tty))
return;
if (tty->rleft == rleft && tty->rright == rright)
return;
tty_putcode2(tty, TTYC_CSR, tty->rupper, tty->rlower);
tty->rleft = rleft;
tty->rright = rright;
if (rleft == 0 && rright == tty->sx - 1)
snprintf(s, sizeof s, "\033[s");
else
snprintf(s, sizeof s, "\033[%u;%us", rleft + 1, rright + 1);
tty_puts(tty, s);
tty->cx = tty->cy = UINT_MAX;
}
/*
* Move the cursor, unless it would wrap itself when the next character is
* printed.
*/
static void
tty_cursor_pane_unless_wrap(struct tty *tty, const struct tty_ctx *ctx,
u_int cx, u_int cy)
{
if (!ctx->wrapped ||
!tty_pane_full_width(tty, ctx) ||
(tty->term->flags & TERM_EARLYWRAP) ||
ctx->xoff + cx != 0 ||
ctx->yoff + cy != tty->cy + 1 ||
tty->cx < tty->sx ||
tty->cy == tty->rlower)
tty_cursor_pane(tty, ctx, cx, cy);
else
log_debug("%s: will wrap at %u,%u", __func__, tty->cx, tty->cy);
}
/* Move cursor inside pane. */
static void
tty_cursor_pane(struct tty *tty, const struct tty_ctx *ctx, u_int cx, u_int cy)
{
tty_cursor(tty, ctx->xoff + cx, ctx->yoff + cy);
}
/* Move cursor to absolute position. */
void
tty_cursor(struct tty *tty, u_int cx, u_int cy)
{
struct tty_term *term = tty->term;
u_int thisx, thisy;
int change;
if (cx > tty->sx - 1)
cx = tty->sx - 1;
thisx = tty->cx;
thisy = tty->cy;
/* No change. */
if (cx == thisx && cy == thisy)
return;
/* Very end of the line, just use absolute movement. */
if (thisx > tty->sx - 1)
goto absolute;
/* Move to home position (0, 0). */
if (cx == 0 && cy == 0 && tty_term_has(term, TTYC_HOME)) {
tty_putcode(tty, TTYC_HOME);
goto out;
}
/* Zero on the next line. */
if (cx == 0 && cy == thisy + 1 && thisy != tty->rlower &&
(!tty_use_margin(tty) || tty->rleft == 0)) {
tty_putc(tty, '\r');
tty_putc(tty, '\n');
goto out;
}
/* Moving column or row. */
if (cy == thisy) {
/*
* Moving column only, row staying the same.
*/
/* To left edge. */
if (cx == 0 && (!tty_use_margin(tty) || tty->rleft == 0)) {
tty_putc(tty, '\r');
goto out;
}
/* One to the left. */
if (cx == thisx - 1 && tty_term_has(term, TTYC_CUB1)) {
tty_putcode(tty, TTYC_CUB1);
goto out;
}
/* One to the right. */
if (cx == thisx + 1 && tty_term_has(term, TTYC_CUF1)) {
tty_putcode(tty, TTYC_CUF1);
goto out;
}
/* Calculate difference. */
change = thisx - cx; /* +ve left, -ve right */
/*
* Use HPA if change is larger than absolute, otherwise move
* the cursor with CUB/CUF.
*/
if ((u_int) abs(change) > cx && tty_term_has(term, TTYC_HPA)) {
tty_putcode1(tty, TTYC_HPA, cx);
goto out;
} else if (change > 0 && tty_term_has(term, TTYC_CUB)) {
if (change == 2 && tty_term_has(term, TTYC_CUB1)) {
tty_putcode(tty, TTYC_CUB1);
tty_putcode(tty, TTYC_CUB1);
goto out;
}
tty_putcode1(tty, TTYC_CUB, change);
goto out;
} else if (change < 0 && tty_term_has(term, TTYC_CUF)) {
tty_putcode1(tty, TTYC_CUF, -change);
goto out;
}
} else if (cx == thisx) {
/*
* Moving row only, column staying the same.
*/
/* One above. */
if (thisy != tty->rupper &&
cy == thisy - 1 && tty_term_has(term, TTYC_CUU1)) {
tty_putcode(tty, TTYC_CUU1);
goto out;
}
/* One below. */
if (thisy != tty->rlower &&
cy == thisy + 1 && tty_term_has(term, TTYC_CUD1)) {
tty_putcode(tty, TTYC_CUD1);
goto out;
}
/* Calculate difference. */
change = thisy - cy; /* +ve up, -ve down */
/*
* Try to use VPA if change is larger than absolute or if this
* change would cross the scroll region, otherwise use CUU/CUD.
*/
if ((u_int) abs(change) > cy ||
(change < 0 && cy - change > tty->rlower) ||
(change > 0 && cy - change < tty->rupper)) {
if (tty_term_has(term, TTYC_VPA)) {
tty_putcode1(tty, TTYC_VPA, cy);
goto out;
}
} else if (change > 0 && tty_term_has(term, TTYC_CUU)) {
tty_putcode1(tty, TTYC_CUU, change);
goto out;
} else if (change < 0 && tty_term_has(term, TTYC_CUD)) {
tty_putcode1(tty, TTYC_CUD, -change);
goto out;
}
}
absolute:
/* Absolute movement. */
tty_putcode2(tty, TTYC_CUP, cy, cx);
out:
tty->cx = cx;
tty->cy = cy;
}
void
tty_attributes(struct tty *tty, const struct grid_cell *gc,
const struct window_pane *wp)
{
struct grid_cell *tc = &tty->cell, gc2;
int changed;
/* Ignore cell if it is the same as the last one. */
if (wp != NULL &&
(int)wp->id == tty->last_wp &&
~(wp->window->flags & WINDOW_STYLECHANGED) &&
gc->attr == tty->last_cell.attr &&
gc->fg == tty->last_cell.fg &&
gc->bg == tty->last_cell.bg)
return;
tty->last_wp = (wp != NULL ? (int)wp->id : -1);
memcpy(&tty->last_cell, gc, sizeof tty->last_cell);
/* Copy cell and update default colours. */
memcpy(&gc2, gc, sizeof gc2);
if (wp != NULL)
tty_default_colours(&gc2, wp);
/*
* If no setab, try to use the reverse attribute as a best-effort for a
* non-default background. This is a bit of a hack but it doesn't do
* any serious harm and makes a couple of applications happier.
*/
if (!tty_term_has(tty->term, TTYC_SETAB)) {
if (gc2.attr & GRID_ATTR_REVERSE) {
if (gc2.fg != 7 && gc2.fg != 8)
gc2.attr &= ~GRID_ATTR_REVERSE;
} else {
if (gc2.bg != 0 && gc2.bg != 8)
gc2.attr |= GRID_ATTR_REVERSE;
}
}
/* Fix up the colours if necessary. */
tty_check_fg(tty, wp, &gc2);
tty_check_bg(tty, wp, &gc2);
/* If any bits are being cleared, reset everything. */
if (tc->attr & ~gc2.attr)
tty_reset(tty);
/*
* Set the colours. This may call tty_reset() (so it comes next) and
* may add to (NOT remove) the desired attributes by changing new_attr.
*/
tty_colours(tty, &gc2);
/* Filter out attribute bits already set. */
changed = gc2.attr & ~tc->attr;
tc->attr = gc2.attr;
/* Set the attributes. */
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_set_italics(tty);
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_STRIKETHROUGH)
tty_putcode(tty, TTYC_SMXX);
if ((changed & GRID_ATTR_CHARSET) && tty_acs_needed(tty))
tty_putcode(tty, TTYC_SMACS);
}
static void
tty_colours(struct tty *tty, const struct grid_cell *gc)
{
struct grid_cell *tc = &tty->cell;
int have_ax;
/* No changes? Nothing is necessary. */
if (gc->fg == tc->fg && gc->bg == tc->bg)
return;
/*
* Is either the default colour? This is handled specially because the
* best solution might be to reset both colours to default, in which
* case if only one is default need to fall onward to set the other
* colour.
*/
if (gc->fg == 8 || gc->bg == 8) {
/*
* If don't have AX but do have op, send sgr0 (op can't
* actually be used because it is sometimes the same as sgr0
* and sometimes isn't). This resets both colours to default.
*
* Otherwise, try to set the default colour only as needed.
*/
have_ax = tty_term_flag(tty->term, TTYC_AX);
if (!have_ax && tty_term_has(tty->term, TTYC_OP))
tty_reset(tty);
else {
if (gc->fg == 8 && tc->fg != 8) {
if (have_ax)
tty_puts(tty, "\033[39m");
else if (tc->fg != 7)
tty_putcode1(tty, TTYC_SETAF, 7);
tc->fg = 8;
}
if (gc->bg == 8 && tc->bg != 8) {
if (have_ax)
tty_puts(tty, "\033[49m");
else if (tc->bg != 0)
tty_putcode1(tty, TTYC_SETAB, 0);
tc->bg = 8;
}
}
}
/* Set the foreground colour. */
if (gc->fg != 8 && gc->fg != tc->fg)
tty_colours_fg(tty, gc);
/*
* Set the background colour. This must come after the foreground as
* tty_colour_fg() can call tty_reset().
*/
if (gc->bg != 8 && gc->bg != tc->bg)
tty_colours_bg(tty, gc);
}
static void
tty_check_fg(struct tty *tty, const struct window_pane *wp,
struct grid_cell *gc)
{
u_char r, g, b;
u_int colours;
int c;
/*
* Perform substitution if this pane has a palette. If the bright
* attribute is set, use the bright entry in the palette by changing to
* the aixterm colour.
*/
if (~gc->flags & GRID_FLAG_NOPALETTE) {
c = gc->fg;
if (c < 8 && gc->attr & GRID_ATTR_BRIGHT)
c += 90;
if ((c = window_pane_get_palette(wp, c)) != -1)
gc->fg = c;
}
/* Is this a 24-bit colour? */
if (gc->fg & COLOUR_FLAG_RGB) {
/* Not a 24-bit terminal? Translate to 256-colour palette. */
if (!tty_term_has(tty->term, TTYC_SETRGBF)) {
colour_split_rgb(gc->fg, &r, &g, &b);
gc->fg = colour_find_rgb(r, g, b);
} else
return;
}
/* How many colours does this terminal have? */
if ((tty->term->flags|tty->term_flags) & TERM_256COLOURS)
colours = 256;
else
colours = tty_term_number(tty->term, TTYC_COLORS);
/* Is this a 256-colour colour? */
if (gc->fg & COLOUR_FLAG_256) {
/* And not a 256 colour mode? */
if (colours != 256) {
gc->fg = colour_256to16(gc->fg);
if (gc->fg & 8) {
gc->fg &= 7;
if (colours >= 16)
gc->fg += 90;
else
gc->attr |= GRID_ATTR_BRIGHT;
} else
gc->attr &= ~GRID_ATTR_BRIGHT;
}
return;
}
/* Is this an aixterm colour? */
if (gc->fg >= 90 && gc->fg <= 97 && colours < 16) {
gc->fg -= 90;
gc->attr |= GRID_ATTR_BRIGHT;
}
}
static void
tty_check_bg(struct tty *tty, const struct window_pane *wp,
struct grid_cell *gc)
{
u_char r, g, b;
u_int colours;
int c;
/* Perform substitution if this pane has a palette. */
if (~gc->flags & GRID_FLAG_NOPALETTE) {
if ((c = window_pane_get_palette(wp, gc->bg)) != -1)
gc->bg = c;
}
/* Is this a 24-bit colour? */
if (gc->bg & COLOUR_FLAG_RGB) {
/* Not a 24-bit terminal? Translate to 256-colour palette. */
if (!tty_term_has(tty->term, TTYC_SETRGBB)) {
colour_split_rgb(gc->bg, &r, &g, &b);
gc->bg = colour_find_rgb(r, g, b);
} else
return;
}
/* How many colours does this terminal have? */
if ((tty->term->flags|tty->term_flags) & TERM_256COLOURS)
colours = 256;
else
colours = tty_term_number(tty->term, TTYC_COLORS);
/* Is this a 256-colour colour? */
if (gc->bg & COLOUR_FLAG_256) {
/*
* And not a 256 colour mode? Translate to 16-colour
* palette. Bold background doesn't exist portably, so just
* discard the bold bit if set.
*/
if (colours != 256) {
gc->bg = colour_256to16(gc->bg);
if (gc->bg & 8) {
gc->bg &= 7;
if (colours >= 16)
gc->fg += 90;
}
}
return;
}
/* Is this an aixterm colour? */
if (gc->bg >= 90 && gc->bg <= 97 && colours < 16)
gc->bg -= 90;
}
static void
tty_colours_fg(struct tty *tty, const struct grid_cell *gc)
{
struct grid_cell *tc = &tty->cell;
char s[32];
/* Is this a 24-bit or 256-colour colour? */
if (gc->fg & COLOUR_FLAG_RGB || gc->fg & COLOUR_FLAG_256) {
if (tty_try_colour(tty, gc->fg, "38") == 0)
goto save_fg;
/* Should not get here, already converted in tty_check_fg. */
return;
}
/* Is this an aixterm bright colour? */
if (gc->fg >= 90 && gc->fg <= 97) {
xsnprintf(s, sizeof s, "\033[%dm", gc->fg);
tty_puts(tty, s);
goto save_fg;
}
/* Otherwise set the foreground colour. */
tty_putcode1(tty, TTYC_SETAF, gc->fg);
save_fg:
/* Save the new values in the terminal current cell. */
tc->fg = gc->fg;
}
static void
tty_colours_bg(struct tty *tty, const struct grid_cell *gc)
{
struct grid_cell *tc = &tty->cell;
char s[32];
/* Is this a 24-bit or 256-colour colour? */
if (gc->bg & COLOUR_FLAG_RGB || gc->bg & COLOUR_FLAG_256) {
if (tty_try_colour(tty, gc->bg, "48") == 0)
goto save_bg;
/* Should not get here, already converted in tty_check_bg. */
return;
}
/* Is this an aixterm bright colour? */
if (gc->bg >= 90 && gc->bg <= 97) {
xsnprintf(s, sizeof s, "\033[%dm", gc->bg + 10);
tty_puts(tty, s);
goto save_bg;
}
/* Otherwise set the background colour. */
tty_putcode1(tty, TTYC_SETAB, gc->bg);
save_bg:
/* Save the new values in the terminal current cell. */
tc->bg = gc->bg;
}
static int
tty_try_colour(struct tty *tty, int colour, const char *type)
{
u_char r, g, b;
char s[32];
if (colour & COLOUR_FLAG_256) {
/*
* If the user has specified -2 to the client (meaning
* TERM_256COLOURS is set), setaf and setab may not work (or
* they may not want to use them), so send the usual sequence.
*
* Also if RGB is set, setaf and setab do not support the 256
* colour palette so use the sequences directly there too.
*/
if ((tty->term_flags & TERM_256COLOURS) ||
tty_term_has(tty->term, TTYC_RGB))
goto fallback_256;
/*
* If the terminfo entry has 256 colours and setaf and setab
* exist, assume that they work correctly.
*/
if (tty->term->flags & TERM_256COLOURS) {
if (*type == '3') {
if (!tty_term_has(tty->term, TTYC_SETAF))
goto fallback_256;
tty_putcode1(tty, TTYC_SETAF, colour & 0xff);
} else {
if (!tty_term_has(tty->term, TTYC_SETAB))
goto fallback_256;
tty_putcode1(tty, TTYC_SETAB, colour & 0xff);
}
return (0);
}
goto fallback_256;
}
if (colour & COLOUR_FLAG_RGB) {
if (*type == '3') {
if (!tty_term_has(tty->term, TTYC_SETRGBF))
return (-1);
colour_split_rgb(colour & 0xffffff, &r, &g, &b);
tty_putcode3(tty, TTYC_SETRGBF, r, g, b);
} else {
if (!tty_term_has(tty->term, TTYC_SETRGBB))
return (-1);
colour_split_rgb(colour & 0xffffff, &r, &g, &b);
tty_putcode3(tty, TTYC_SETRGBB, r, g, b);
}
return (0);
}
return (-1);
fallback_256:
xsnprintf(s, sizeof s, "\033[%s;5;%dm", type, colour & 0xff);
log_debug("%s: 256 colour fallback: %s", tty->client->name, s);
tty_puts(tty, s);
return (0);
}
static void
tty_default_colours(struct grid_cell *gc, const struct window_pane *wp)
{
struct window *w = wp->window;
struct options *oo = w->options;
const struct grid_cell *agc, *pgc, *wgc;
int c;
if (w->flags & WINDOW_STYLECHANGED) {
w->flags &= ~WINDOW_STYLECHANGED;
agc = options_get_style(oo, "window-active-style");
memcpy(&w->active_style, agc, sizeof w->active_style);
wgc = options_get_style(oo, "window-style");
memcpy(&w->style, wgc, sizeof w->style);
} else {
agc = &w->active_style;
wgc = &w->style;
}
pgc = &wp->colgc;
if (gc->fg == 8) {
if (pgc->fg != 8)
gc->fg = pgc->fg;
else if (wp == w->active && agc->fg != 8)
gc->fg = agc->fg;
else
gc->fg = wgc->fg;
if (gc->fg != 8 &&
(c = window_pane_get_palette(wp, gc->fg)) != -1)
gc->fg = c;
}
if (gc->bg == 8) {
if (pgc->bg != 8)
gc->bg = pgc->bg;
else if (wp == w->active && agc->bg != 8)
gc->bg = agc->bg;
else
gc->bg = wgc->bg;
if (gc->bg != 8 &&
(c = window_pane_get_palette(wp, gc->bg)) != -1)
gc->bg = c;
}
}
static void
tty_default_attributes(struct tty *tty, const struct window_pane *wp, u_int bg)
{
static struct grid_cell gc;
memcpy(&gc, &grid_default_cell, sizeof gc);
gc.bg = bg;
tty_attributes(tty, &gc, wp);
}
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