diff options
Diffstat (limited to 'tty.c')
| -rw-r--r-- | tty.c | 89 |
1 files changed, 86 insertions, 3 deletions
@@ -1,4 +1,4 @@ -/* $Id: tty.c,v 1.98 2009-05-14 16:21:55 nicm Exp $ */ +/* $Id: tty.c,v 1.99 2009-05-19 16:08:35 nicm Exp $ */ /* * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> @@ -136,6 +136,8 @@ tty_start_tty(struct tty *tty) int what; #endif + tty_detect_utf8(tty); + if (tcgetattr(tty->fd, &tty->tio) != 0) fatal("tcgetattr failed"); memcpy(&tio, &tty->tio, sizeof tio); @@ -197,16 +199,97 @@ tty_stop_tty(struct tty *tty) 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_CLEAR)); + 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_detect_utf8(struct tty *tty) +{ + struct pollfd pfd; + char buf[7]; + size_t len; + ssize_t n; + int nfds; + struct termios tio, old_tio; +#ifdef TIOCFLUSH + int what; +#endif + + if (tty->flags & TTY_UTF8) + return; + + /* + * If the terminal looks reasonably likely to support this, try to + * write a three-byte UTF-8 wide character to the terminal, then read + * the cursor position. + * + * XXX This entire function is a hack. + */ + + /* Check if the terminal looks sort of vt100. */ + if (strstr(tty_term_string(tty->term, TTYC_CLEAR), "[2J") == NULL || + strstr(tty_term_string(tty->term, TTYC_CUP), "H") == NULL) + return; + + if (tcgetattr(tty->fd, &old_tio) != 0) + fatal("tcgetattr failed"); + cfmakeraw(&tio); + 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 + +#define UTF8_TEST_DATA "\033[H\357\277\246\033[6n" + if (write(tty->fd, UTF8_TEST_DATA, (sizeof UTF8_TEST_DATA) - 1) == -1) + fatal("write failed"); +#undef UTF8_TEST_DATA + + len = 0; + for (;;) { + pfd.fd = tty->fd; + pfd.events = POLLIN; + + nfds = poll(&pfd, 1, 500); + if (nfds == -1) { + if (errno == EAGAIN || errno == EINTR) + continue; + fatal("poll failed"); + } + if (nfds == 0) + break; +#ifdef HAVE_POLL + if (pfd.revents & (POLLERR|POLLNVAL|POLLHUP)) + break; +#endif + if (!(pfd.revents & POLLIN)) + continue; + + if ((n = read(tty->fd, buf + len, 1)) != 1) + break; + buf[++len] = '\0'; + + if (len == (sizeof buf) - 1) { + if (strcmp(buf, "\033[1;3R") == 0) + tty->flags |= TTY_UTF8; + break; + } + } + + if (tcsetattr(tty->fd, TCSANOW, &old_tio) != 0) + fatal("tcsetattr failed"); +} + +void tty_fill_acs(struct tty *tty) { const char *ptr; |