488 lines
10 KiB
C
Executable File
488 lines
10 KiB
C
Executable File
/* Copyright (c) 1985 Ceriel J.H. Jacobs */
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/*
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* Terminal handling routines, mostly initializing.
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*/
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# ifndef lint
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static char rcsid[] = "$Header$";
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# endif
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# define _TERM_
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#include "in_all.h"
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#include "term.h"
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#include "machine.h"
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#include "output.h"
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#include "display.h"
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#include "options.h"
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#include "getline.h"
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#include "keys.h"
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#include "main.h"
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#ifdef TIOCGWINSZ
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static struct winsize w;
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#endif
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char *strcpy(),
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*strcat(),
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*tgoto(),
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*tgetstr(),
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*getenv();
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static char tcbuf1[1024]; /* Holds terminal capability strings */
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static char * ptc; /* Pointer in it */
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static char tcbuf[1024]; /* Another termcap buffer */
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short ospeed; /* Needed for tputs() */
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char PC; /* Needed for tputs() */
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char * UP; /* Needed for tgoto() */
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static char *ll;
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struct linelist _X[100]; /* 100 is enough ? */
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# if USG_TTY
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static struct termio _tty,_svtty;
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# elif POSIX_TTY
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static struct termios _tty, _svtty;
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# else
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# ifdef TIOCSPGRP
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static int proc_id, saved_pgrpid;
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# endif
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static struct sgttyb _tty,_svtty;
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# ifdef TIOCGETC
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static struct tchars _ttyc, _svttyc;
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# endif
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# ifdef TIOCGLTC
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static int line_discipline;
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static struct ltchars _lttyc, _svlttyc;
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# endif
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# endif
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static VOID
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handle(c) char *c; { /* if character *c is used, set it to undefined */
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if (isused(*c)) *c = 0377;
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}
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/*
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* Set terminal in cbreak mode.
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* Also check if tabs need expanding.
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*/
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VOID
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inittty() {
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# if USG_TTY
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register struct termio *p = &_tty;
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ioctl(0,TCGETA,(char *) p);
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_svtty = *p;
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if (p->c_oflag & TAB3) {
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/*
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* We do tab expansion ourselves
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*/
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expandtabs = 1;
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}
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p->c_oflag &= ~(TAB3|OCRNL|ONLRET|ONLCR);
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p->c_oflag |= (/*ONOCR|*/OPOST); /* ONOCR does not seem to work
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very well in combination with
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~ONLCR
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*/
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p->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON);
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if (isused('S'&037) || isused('Q'&037)) p->c_iflag &= ~IXON;
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handle(&(p->c_cc[0])); /* INTR and QUIT (mnemonics not defined ??) */
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handle(&(p->c_cc[1]));
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erasech = p->c_cc[VERASE];
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killch = p->c_cc[VKILL];
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p->c_cc[VMIN] = 1; /* Just wait for one character */
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p->c_cc[VTIME] = 0;
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ospeed = p->c_cflag & CBAUD;
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ioctl(0,TCSETAW,(char *) p);
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#elif POSIX_TTY
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register struct termios *p = &_tty;
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tcgetattr(0, p);
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_svtty = *p;
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#ifdef _MINIX /* Should be XTABS */
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if (p->c_oflag & XTABS) {
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/*
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* We do tab expansion ourselves
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*/
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expandtabs = 1;
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}
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p->c_oflag &= (OPOST|XTABS);
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#else
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p->c_oflag &= ~OPOST;
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#endif
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p->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON);
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if (isused('S'&037) || isused('Q'&037)) p->c_iflag &= ~IXON;
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handle(&(p->c_cc[VINTR]));
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handle(&(p->c_cc[VQUIT]));
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erasech = p->c_cc[VERASE];
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killch = p->c_cc[VKILL];
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p->c_cc[VMIN] = 1; /* Just wait for one character */
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p->c_cc[VTIME] = 0;
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ospeed = cfgetospeed(p);
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tcsetattr(0, TCSANOW, p);
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# else
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register struct sgttyb *p = &_tty;
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# ifdef TIOCSPGRP
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/*
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* If we can, we put yap in another process group, and the terminal
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* with it. This is done, so that interrupts given by the user
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* will only affect yap and not it's children (processes writing
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* on a pipe to yap)
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*/
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if (ioctl(0, TIOCSPGRP, (char *) &proc_id) != -1) {
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setpgrp(0, proc_id);
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}
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# endif
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ioctl(0,TIOCGETP,(char *) p);
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_svtty = *p;
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erasech = p->sg_erase;
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killch = p->sg_kill;
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ospeed = p->sg_ospeed;
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if (p->sg_flags & XTABS) {
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/*
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* We do tab expansion ourselves
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*/
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expandtabs = 1;
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}
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p->sg_flags |= (CBREAK);
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p->sg_flags &= ~(ECHO|XTABS|RAW|LCASE|CRMOD);
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#ifdef TIOCSETN
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ioctl(0, TIOCSETN, (char *) p);
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#else
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ioctl(0,TIOCSETP,(char *) p);
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#endif
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/* Bloody Sun ... */
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#undef t_startc
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#undef t_stopc
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#undef t_intrc
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#undef t_quitc
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#undef t_suspc
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#undef t_dsuspc
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#undef t_flushc
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#undef t_lnextc
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# ifdef TIOCGETC
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{ register struct tchars *q = &_ttyc;
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ioctl(0,TIOCGETC,(char *) q);
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_svttyc = *q;
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handle(&(q->t_intrc));
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handle(&(q->t_quitc));
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if (isused(q->t_startc) || isused(q->t_stopc)) {
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q->t_startc = q->t_stopc = 0377;
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}
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ioctl(0,TIOCSETC, (char *) q);
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}
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# endif
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# ifdef TIOCGLTC
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{ register struct ltchars *q = &_lttyc;
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ioctl(0,TIOCGETD,(char *) &line_discipline);
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if (line_discipline == NTTYDISC) {
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ioctl(0, TIOCGLTC,(char *) q);
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_svlttyc = *q;
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handle(&(q->t_suspc));
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handle(&(q->t_dsuspc));
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q->t_flushc = q->t_lnextc = 0377;
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ioctl(0,TIOCSLTC, (char *) q);
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}
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}
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# endif
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# endif
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}
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/*
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* Reset the terminal to its original state
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*/
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VOID
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resettty() {
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# if USG_TTY
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ioctl(0,TCSETAW,(char *) &_svtty);
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# elif POSIX_TTY
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tcsetattr(0, TCSANOW, &_svtty);
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# else
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# ifdef TIOCSPGRP
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ioctl(0, TIOCSPGRP, (char *) &saved_pgrpid);
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setpgrp(0, saved_pgrpid);
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# endif
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ioctl(0,TIOCSETP,(char *) &_svtty);
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# ifdef TIOCGETC
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ioctl(0,TIOCSETC, (char *) &_svttyc);
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# endif
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# ifdef TIOCGLTC
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if (line_discipline == NTTYDISC) ioctl(0,TIOCSLTC, (char *) &_svlttyc);
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# endif
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# endif
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putline(TE);
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flush();
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}
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/*
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* Get terminal capability "cap".
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* If not present, return an empty string.
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*/
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STATIC char *
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getcap(cap) char *cap; {
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register char *s;
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s = tgetstr(cap, &ptc);
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if (!s) return "";
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return s;
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}
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/*
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* Initialize some terminal-dependent stuff.
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*/
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VOID
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ini_terminal() {
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register char * s;
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register struct linelist *lp, *lp1;
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register i;
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register UG, SG;
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char tempbuf[20];
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char *mb, *mh, *mr; /* attributes */
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initkeys();
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#if !_MINIX
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# ifdef TIOCSPGRP
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proc_id = getpid();
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ioctl(0,TIOCGPGRP, (char *) &saved_pgrpid);
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# endif
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#endif
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inittty();
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stupid = 1;
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ptc = tcbuf1;
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BC = "\b";
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TA = "\t";
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if (!(s = getenv("TERM"))) s = "dumb";
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if (tgetent(tcbuf, s) <= 0) {
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panic("No termcap entry");
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}
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stupid = 0;
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hardcopy = tgetflag("hc"); /* Hard copy terminal?*/
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PC = *(getcap("pc"));
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if (*(s = getcap("bc"))) {
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/*
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* Backspace if not ^H
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*/
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BC = s;
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}
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UP = getcap("up"); /* move up a line */
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CE = getcap("ce"); /* clear to end of line */
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CL = getcap("cl"); /* clear screen */
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if (!*CL) cflag = 1;
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TI = getcap("ti"); /* Initialization for CM */
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TE = getcap("te"); /* end for CM */
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CM = getcap("cm"); /* cursor addressing */
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SR = getcap("sr"); /* scroll reverse */
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AL = getcap("al"); /* Insert line */
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SO = getcap("so"); /* standout */
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SE = getcap("se"); /* standend */
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SG = tgetnum("sg"); /* blanks left by SO, SE */
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if (SG < 0) SG = 0;
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US = getcap("us"); /* underline */
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UE = getcap("ue"); /* end underline */
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UG = tgetnum("ug"); /* blanks left by US, UE */
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if (UG < 0) UG = 0;
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UC = getcap("uc"); /* underline a character */
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mb = getcap("mb"); /* blinking attribute */
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MD = getcap("md"); /* bold attribute */
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ME = getcap("me"); /* turn off attributes */
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mh = getcap("mh"); /* half bright attribute */
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mr = getcap("mr"); /* reversed video attribute */
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if (!nflag) {
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/*
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* Recognize special strings
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*/
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(VOID) addstring(SO,SG,&sppat);
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(VOID) addstring(SE,SG,&sppat);
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(VOID) addstring(US,UG,&sppat);
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(VOID) addstring(UE,UG,&sppat);
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(VOID) addstring(mb,0,&sppat);
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(VOID) addstring(MD,0,&sppat);
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(VOID) addstring(ME,0,&sppat);
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(VOID) addstring(mh,0,&sppat);
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(VOID) addstring(mr,0,&sppat);
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if (*UC) {
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(VOID) strcpy(tempbuf,BC);
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(VOID) strcat(tempbuf,UC);
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(VOID) addstring(tempbuf,0,&sppat);
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}
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}
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if (UG > 0 || uflag) {
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US = "";
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UE = "";
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}
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if (*US || uflag) UC = "";
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COLS = tgetnum("co"); /* columns on page */
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i = tgetnum("li"); /* Lines on page */
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AM = tgetflag("am"); /* terminal wraps automatically? */
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XN = tgetflag("xn"); /* and then ignores next newline? */
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DB = tgetflag("db"); /* terminal retains lines below */
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if (!*(s = getcap("ho")) && *CM) {
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s = tgoto(CM,0,0); /* Another way of getting home */
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}
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if ((!*CE && !*AL) || !*s || hardcopy) {
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cflag = stupid = 1;
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}
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(VOID) strcpy(HO,s);
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if (*(s = getcap("ta"))) {
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/*
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* Tab (other than ^I or padding)
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*/
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TA = s;
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}
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if (!*(ll = getcap("ll")) && *CM && i > 0) {
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/*
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* Lower left hand corner
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*/
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(VOID) strcpy(BO, tgoto(CM,0,i-1));
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}
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else (VOID) strcpy(BO, ll);
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if (COLS <= 0 || COLS > 256) {
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if ((unsigned) COLS >= 65409) {
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/* SUN bug */
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COLS &= 0xffff;
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COLS -= (65409 - 128);
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}
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if (COLS <= 0 || COLS > 256) COLS = 80;
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}
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if (i <= 0) {
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i = 24;
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cflag = stupid = 1;
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}
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LINES = i;
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maxpagesize = i - 1;
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scrollsize = maxpagesize / 2;
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if (scrollsize <= 0) scrollsize = 1;
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if (!pagesize || pagesize >= i) {
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pagesize = maxpagesize;
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}
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/*
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* The next part does not really belong here, but there it is ...
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* Initialize a circular list for the screenlines.
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*/
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scr_info.tail = lp = _X;
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lp1 = lp + (100 - 1);
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for (; lp <= lp1; lp++) {
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/*
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* Circular doubly linked list
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*/
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lp->next = lp + 1;
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lp->prev = lp - 1;
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}
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lp1->next = scr_info.tail;
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lp1->next->prev = lp1;
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if (stupid) {
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(VOID) strcpy(BO,"\r\n");
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}
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putline(TI);
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window();
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}
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/*
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* Place cursor at start of line n.
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*/
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VOID
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mgoto(n) register n; {
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if (n == 0) home();
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else if (n == maxpagesize && *BO) bottom();
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else if (*CM) {
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/*
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* Cursor addressing
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*/
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tputs(tgoto(CM,0,n),1,fputch);
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}
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else if (*BO && *UP && n >= (maxpagesize >> 1)) {
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/*
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* Bottom and then up
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*/
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bottom();
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while (n++ < maxpagesize) putline(UP);
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}
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else { /* Home, and then down */
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home();
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while (n--) putline("\r\n");
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}
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}
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/*
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* Clear bottom line
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*/
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VOID
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clrbline() {
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if (stupid) {
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putline("\r\n");
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return;
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}
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bottom();
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if (*CE) {
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/*
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* We can clear to end of line
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*/
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clrtoeol();
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return;
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}
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# ifdef VT100_PATCH
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insert_line(maxpagesize);
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# else
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insert_line();
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# endif
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}
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# ifdef VT100_PATCH
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ins_line(l) {
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tputs(tgoto(AL, l, 0), maxpagesize - l, fputch);
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}
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# endif
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VOID
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home() {
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tputs(HO,1,fputch);
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}
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VOID
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bottom() {
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tputs(BO,1,fputch);
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if (!*BO) mgoto(maxpagesize);
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}
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int
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window()
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{
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#ifdef TIOCGWINSZ
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if (ioctl(1, TIOCGWINSZ, &w) < 0) return 0;
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if (w.ws_col == 0) w.ws_col = COLS;
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if (w.ws_row == 0) w.ws_row = LINES;
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if (w.ws_col != COLS || w.ws_row != LINES) {
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COLS = w.ws_col;
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LINES = w.ws_row;
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maxpagesize = LINES - 1;
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pagesize = maxpagesize;
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if (! *ll) (VOID) strcpy(BO, tgoto(CM,0,maxpagesize));
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scr_info.currentpos = 0;
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scrollsize = maxpagesize / 2;
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if (scrollsize <= 0) scrollsize = 1;
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return 1;
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}
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#endif
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return 0;
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}
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