path: root/tty.c

/* $OpenBSD$ */

/*
 * 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 <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>

#include "tmux.h"

void	tty_read_callback(struct bufferevent *, void *);
void	tty_error_callback(struct bufferevent *, short, void *);

void	tty_fill_acs(struct tty *);

int	tty_try_256(struct tty *, u_char, const char *);
int	tty_try_88(struct tty *, u_char, const char *);

void	tty_colours(struct tty *, const struct grid_cell *, int *);
void	tty_colours_fg(struct tty *, const struct grid_cell *, int *);
void	tty_colours_bg(struct tty *, const struct grid_cell *, int *);

void	tty_redraw_region(struct tty *, const struct tty_ctx *);
void	tty_emulate_repeat(
	    struct tty *, enum tty_code_code, enum tty_code_code, u_int);
void	tty_cell(struct tty *,
    	    const struct grid_cell *, const struct grid_utf8 *);

void
tty_init(struct tty *tty, int fd, char *term)
{
	char	*path;

	memset(tty, 0, sizeof *tty);
	tty->log_fd = -1;

	if (term == NULL || *term == '\0')
		tty->termname = xstrdup("unknown");
	else
		tty->termname = xstrdup(term);

	if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
		fatal("fcntl failed");
	tty->fd = fd;

	if ((path = ttyname(fd)) == NULL)
		fatalx("ttyname failed");
	tty->path = xstrdup(path);

	tty->flags = 0;
	tty->term_flags = 0;
}

void
tty_resize(struct tty *tty)
{
	struct winsize	ws;

	if (ioctl(tty->fd, TIOCGWINSZ, &ws) != -1) {
		tty->sx = ws.ws_col;
		tty->sy = ws.ws_row;
	}
	if (tty->sx == 0)
		tty->sx = 80;
	if (tty->sy == 0)
		tty->sy = 24;

	tty->cx = UINT_MAX;
	tty->cy = UINT_MAX;

	tty->rupper = UINT_MAX;
	tty->rlower = UINT_MAX;
}

int
tty_open(struct tty *tty, const char *overrides, char **cause)
{
	int	fd;

	if (debug_level > 3) {
		fd = open("tmux.out", O_WRONLY|O_CREAT|O_TRUNC, 0644);
		if (fd != -1 && fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
			fatal("fcntl failed");
		tty->log_fd = fd;
	}

	tty->term = tty_term_find(tty->termname, tty->fd, overrides, cause);
	if (tty->term == NULL) {
		tty_close(tty);
		return (-1);
	}
	tty->flags |= TTY_OPENED;

	tty->flags &= ~(TTY_NOCURSOR|TTY_FREEZE|TTY_ESCAPE);

	tty->event = bufferevent_new(
	    tty->fd, tty_read_callback, NULL, tty_error_callback, tty);

	tty_start_tty(tty);

	tty_keys_init(tty);

	tty_fill_acs(tty);

	return (0);
}

void
tty_read_callback(unused struct bufferevent *bufev, void *data)
{
	struct tty	*tty = data;

	while (tty_keys_next(tty))
		;
}

void
tty_error_callback(
    unused struct bufferevent *bufev, unused short what, unused void *data)