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tty.c
2113 lines (1775 loc) · 49.6 KB
/
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_acs(tty) \
(tty_term_has((tty)->term, TTYC_ACSC) && !((tty)->flags & TTY_UTF8))
#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);
}
int
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);
if (!tty_set_size(tty, sx, sy))
return (0);
tty_invalidate(tty);
return (1);
}
int
tty_set_size(struct tty *tty, u_int sx, u_int sy)
{
if (sx == tty->sx && sy == tty->sy)
return (0);
tty->sx = sx;
tty->sy = sy;
return (1);
}
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 == -1)
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 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);
if (tty_use_acs(tty))
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\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_use_acs(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_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 - 1);
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 - 1);
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);
}
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_cell gc, last;
u_int i, j, sx, nx, width;
int flags, cleared = 0;
char buf[512];
size_t 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 > s->grid->linedata[s->grid->hsize + py].cellsize)
sx = s->grid->linedata[s->grid->hsize + py].cellsize;
if (sx > tty->sx)
sx = tty->sx;
if (wp == NULL ||
py == 0 ||
(~s->grid->linedata[s->grid->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(s->grid, i, py, &gc);
if (len != 0 &&
(((~tty->flags & TTY_UTF8) &&
(gc.data.size != 1 ||
*gc.data.data >= 0x7f ||
gc.data.width != 1)) ||
(gc.attr & GRID_ATTR_CHARSET) ||
gc.flags != last.flags ||
gc.attr != last.attr ||
gc.fg != last.fg ||
gc.bg != last.bg ||
(sizeof buf) - len < gc.data.size)) {
tty_attributes(tty, &last, wp);
tty_putn(tty, buf, len, width);
len = 0;
width = 0;
}
if (gc.flags & GRID_FLAG_SELECTED)
screen_select_cell(s, &last, &gc);
else
memcpy(&last, &gc, sizeof last);
if (((~tty->flags & TTY_UTF8) &&
(gc.data.size != 1 ||
*gc.data.data >= 0x7f ||
gc.data.width != 1)) ||
(gc.attr & GRID_ATTR_CHARSET)) {
tty_attributes(tty, &last, wp);
if (~tty->flags & TTY_UTF8) {
for (j = 0; j < gc.data.width; j++)
tty_putc(tty, '_');
} else {
for (j = 0; j < gc.data.size; j++)
tty_putc(tty, gc.data.data[j]);
}
} else {
memcpy(buf + len, gc.data.data, gc.data.size);
len += gc.data.size;
width += gc.data.width;
}
}
if (len != 0) {
tty_attributes(tty, &last, wp);
tty_putn(tty, buf, len, width);
}
nx = screen_size_x(s) - sx;
if (!cleared && sx < tty->sx && nx != 0) {
tty_default_attributes(tty, wp, 8);
tty_clear_line(tty, wp, oy + py, ox + sx, 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)
{