OpenBSD-4.6/usr.bin/vi/cl/cl_term.c
/* $OpenBSD: cl_term.c,v 1.15 2006/04/22 03:09:15 ray Exp $ */
/*-
* Copyright (c) 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)cl_term.c 10.22 (Berkeley) 9/15/96";
#endif /* not lint */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <bitstring.h>
#include <curses.h>
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "../common/common.h"
#include "cl.h"
static int cl_pfmap(SCR *, seq_t, CHAR_T *, size_t, CHAR_T *, size_t);
/*
* XXX
* THIS REQUIRES THAT ALL SCREENS SHARE A TERMINAL TYPE.
*/
typedef struct _tklist {
char *ts; /* Key's termcap string. */
char *output; /* Corresponding vi command. */
char *name; /* Name. */
u_char value; /* Special value (for lookup). */
} TKLIST;
static TKLIST const c_tklist[] = { /* Command mappings. */
{"kil1", "O", "insert line"},
{"kdch1", "x", "delete character"},
{"kcud1", "j", "cursor down"},
{"kel", "D", "delete to eol"},
{"kind", "\004", "scroll down"}, /* ^D */
{"kll", "$", "go to eol"},
{"khome", "^", "go to sol"},
{"kich1", "i", "insert at cursor"},
{"kdl1", "dd", "delete line"},
{"kcub1", "h", "cursor left"},
{"knp", "\006", "page down"}, /* ^F */
{"kpp", "\002", "page up"}, /* ^B */
{"kri", "\025", "scroll up"}, /* ^U */
{"ked", "dG", "delete to end of screen"},
{"kcuf1", "l", "cursor right"},
{"kcuu1", "k", "cursor up"},
{NULL},
};
static TKLIST const m1_tklist[] = { /* Input mappings (lookup). */
{NULL},
};
static TKLIST const m2_tklist[] = { /* Input mappings (set or delete). */
{"kcud1", "\033ja", "cursor down"}, /* ^[ja */
{"kcub1", "\033ha", "cursor left"}, /* ^[ha */
{"kcuu1", "\033ka", "cursor up"}, /* ^[ka */
{"kcuf1", "\033la", "cursor right"}, /* ^[la */
{NULL},
};
/*
* cl_term_init --
* Initialize the special keys defined by the termcap/terminfo entry.
*
* PUBLIC: int cl_term_init(SCR *);
*/
int
cl_term_init(sp)
SCR *sp;
{
KEYLIST *kp;
SEQ *qp;
TKLIST const *tkp;
char *t;
/* Command mappings. */
for (tkp = c_tklist; tkp->name != NULL; ++tkp) {
if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1)
continue;
if (seq_set(sp, tkp->name, strlen(tkp->name), t, strlen(t),
tkp->output, strlen(tkp->output), SEQ_COMMAND,
SEQ_NOOVERWRITE | SEQ_SCREEN))
return (1);
}
/* Input mappings needing to be looked up. */
for (tkp = m1_tklist; tkp->name != NULL; ++tkp) {
if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1)
continue;
for (kp = keylist;; ++kp)
if (kp->value == tkp->value)
break;
if (kp == NULL)
continue;
if (seq_set(sp, tkp->name, strlen(tkp->name), t, strlen(t),
&kp->ch, 1, SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN))
return (1);
}
/* Input mappings that are already set or are text deletions. */
for (tkp = m2_tklist; tkp->name != NULL; ++tkp) {
if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1)
continue;
/*
* !!!
* Some terminals' <cursor_left> keys send single <backspace>
* characters. This is okay in command mapping, but not okay
* in input mapping. That combination is the only one we'll
* ever see, hopefully, so kluge it here for now.
*/
if (!strcmp(t, "\b"))
continue;
if (tkp->output == NULL) {
if (seq_set(sp, tkp->name, strlen(tkp->name),
t, strlen(t), NULL, 0,
SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN))
return (1);
} else
if (seq_set(sp, tkp->name, strlen(tkp->name),
t, strlen(t), tkp->output, strlen(tkp->output),
SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN))
return (1);
}
/*
* Rework any function key mappings that were set before the
* screen was initialized.
*/
LIST_FOREACH(qp, & sp->gp->seqq, q)
if (F_ISSET(qp, SEQ_FUNCMAP))
(void)cl_pfmap(sp, qp->stype,
qp->input, qp->ilen, qp->output, qp->olen);
return (0);
}
/*
* cl_term_end --
* End the special keys defined by the termcap/terminfo entry.
*
* PUBLIC: int cl_term_end(GS *);
*/
int
cl_term_end(gp)
GS *gp;
{
SEQ *qp, *nqp;
/* Delete screen specific mappings. */
for (qp = LIST_FIRST(&gp->seqq); qp != NULL; qp = nqp) {
nqp = LIST_NEXT(qp, q);
if (F_ISSET(qp, SEQ_SCREEN))
(void)seq_mdel(qp);
}
return (0);
}
/*
* cl_fmap --
* Map a function key.
*
* PUBLIC: int cl_fmap(SCR *, seq_t, CHAR_T *, size_t, CHAR_T *, size_t);
*/
int
cl_fmap(sp, stype, from, flen, to, tlen)
SCR *sp;
seq_t stype;
CHAR_T *from, *to;
size_t flen, tlen;
{
/* Ignore until the screen is running, do the real work then. */
if (F_ISSET(sp, SC_VI) && !F_ISSET(sp, SC_SCR_VI))
return (0);
if (F_ISSET(sp, SC_EX) && !F_ISSET(sp, SC_SCR_EX))
return (0);
return (cl_pfmap(sp, stype, from, flen, to, tlen));
}
/*
* cl_pfmap --
* Map a function key (private version).
*/
static int
cl_pfmap(sp, stype, from, flen, to, tlen)
SCR *sp;
seq_t stype;
CHAR_T *from, *to;
size_t flen, tlen;
{
size_t nlen;
char *p, key_name[64];
(void)snprintf(key_name, sizeof(key_name), "kf%d", atoi(from + 1));
if ((p = tigetstr(key_name)) == NULL ||
p == (char *)-1 || strlen(p) == 0)
p = NULL;
if (p == NULL) {
msgq_str(sp, M_ERR, from, "233|This terminal has no %s key");
return (1);
}
nlen = snprintf(key_name,
sizeof(key_name), "function key %d", atoi(from + 1));
if (nlen >= sizeof(key_name))
nlen = sizeof(key_name) - 1;
return (seq_set(sp, key_name, nlen,
p, strlen(p), to, tlen, stype, SEQ_NOOVERWRITE | SEQ_SCREEN));
}
/*
* cl_optchange --
* Curses screen specific "option changed" routine.
*
* PUBLIC: int cl_optchange(SCR *, int, char *, u_long *);
*/
int
cl_optchange(sp, opt, str, valp)
SCR *sp;
int opt;
char *str;
u_long *valp;
{
CL_PRIVATE *clp;
clp = CLP(sp);
switch (opt) {
case O_COLUMNS:
case O_LINES:
case O_TERM:
/*
* Changing the columns, lines or terminal require that
* we restart the screen.
*/
F_SET(sp->gp, G_SRESTART);
F_CLR(sp, SC_SCR_EX | SC_SCR_VI);
break;
case O_MESG:
(void)cl_omesg(sp, clp, !*valp);
break;
case O_WINDOWNAME:
if (*valp) {
F_CLR(clp, CL_RENAME_OK);
(void)cl_rename(sp, NULL, 0);
} else {
F_SET(clp, CL_RENAME_OK);
/*
* If the screen is live, i.e. we're not reading the
* .exrc file, update the window.
*/
if (sp->frp != NULL && sp->frp->name != NULL)
(void)cl_rename(sp, sp->frp->name, 1);
}
break;
}
return (0);
}
/*
* cl_omesg --
* Turn the tty write permission on or off.
*
* PUBLIC: int cl_omesg(SCR *, CL_PRIVATE *, int);
*/
int
cl_omesg(sp, clp, on)
SCR *sp;
CL_PRIVATE *clp;
int on;
{
struct stat sb;
char *tty;
/* Find the tty, get the current permissions. */
if ((tty = ttyname(STDERR_FILENO)) == NULL) {
if (sp != NULL)
msgq(sp, M_SYSERR, "stderr");
return (1);
}
if (stat(tty, &sb) < 0) {
if (sp != NULL)
msgq(sp, M_SYSERR, "%s", tty);
return (1);
}
/* Save the original status if it's unknown. */
if (clp->tgw == TGW_UNKNOWN)
clp->tgw = sb.st_mode & S_IWGRP ? TGW_SET : TGW_UNSET;
/* Toggle the permissions. */
if (on) {
if (chmod(tty, sb.st_mode | S_IWGRP) < 0) {
if (sp != NULL)
msgq(sp, M_SYSERR,
"046|messages not turned on: %s", tty);
return (1);
}
} else
if (chmod(tty, sb.st_mode & ~S_IWGRP) < 0) {
if (sp != NULL)
msgq(sp, M_SYSERR,
"045|messages not turned off: %s", tty);
return (1);
}
return (0);
}
/*
* cl_ssize --
* Return the terminal size.
*
* PUBLIC: int cl_ssize(SCR *, int, size_t *, size_t *, int *);
*/
int
cl_ssize(sp, sigwinch, rowp, colp, changedp)
SCR *sp;
int sigwinch;
size_t *rowp, *colp;
int *changedp;
{
#ifdef TIOCGWINSZ
struct winsize win;
#endif
size_t col, row;
int rval;
char *p;
/* Assume it's changed. */
if (changedp != NULL)
*changedp = 1;
/*
* !!!
* sp may be NULL.
*
* Get the screen rows and columns. If the values are wrong, it's
* not a big deal -- as soon as the user sets them explicitly the
* environment will be set and the screen package will use the new
* values.
*
* Try TIOCGWINSZ.
*/
row = col = 0;
#ifdef TIOCGWINSZ
if (ioctl(STDERR_FILENO, TIOCGWINSZ, &win) != -1) {
row = win.ws_row;
col = win.ws_col;
}
#endif
/* If here because of suspend or a signal, only trust TIOCGWINSZ. */
if (sigwinch) {
/*
* Somebody didn't get TIOCGWINSZ right, or has suspend
* without window resizing support. The user just lost,
* but there's nothing we can do.
*/
if (row == 0 || col == 0) {
if (changedp != NULL)
*changedp = 0;
return (0);
}
/*
* SunOS systems deliver SIGWINCH when windows are uncovered
* as well as when they change size. In addition, we call
* here when continuing after being suspended since the window
* may have changed size. Since we don't want to background
* all of the screens just because the window was uncovered,
* ignore the signal if there's no change.
*/
if (sp != NULL &&
row == O_VAL(sp, O_LINES) && col == O_VAL(sp, O_COLUMNS)) {
if (changedp != NULL)
*changedp = 0;
return (0);
}
if (rowp != NULL)
*rowp = row;
if (colp != NULL)
*colp = col;
return (0);
}
/*
* !!!
* If TIOCGWINSZ failed, or had entries of 0, try termcap. This
* routine is called before any termcap or terminal information
* has been set up. If there's no TERM environmental variable set,
* let it go, at least ex can run.
*/
if (row == 0 || col == 0) {
if ((p = getenv("TERM")) == NULL)
goto noterm;
if (row == 0) {
if ((rval = tigetnum("lines")) < 0)
msgq(sp, M_SYSERR, "tigetnum: lines");
else
row = rval;
}
if (col == 0) {
if ((rval = tigetnum("cols")) < 0)
msgq(sp, M_SYSERR, "tigetnum: cols");
else
col = rval;
}
}
/* If nothing else, well, it's probably a VT100. */
noterm: if (row == 0)
row = 24;
if (col == 0)
col = 80;
/*
* !!!
* POSIX 1003.2 requires the environment to override everything.
* Often, people can get nvi to stop messing up their screen by
* deleting the LINES and COLUMNS environment variables from their
* dot-files.
*/
if ((p = getenv("LINES")) != NULL)
row = strtol(p, NULL, 10);
if ((p = getenv("COLUMNS")) != NULL)
col = strtol(p, NULL, 10);
if (rowp != NULL)
*rowp = row;
if (colp != NULL)
*colp = col;
return (0);
}
#ifdef _USE_OLD_CURSES_
/*
* cl_putchar --
* Function version of putchar, for tputs.
*
* PUBLIC: int cl_putchar(int);
*/
void
cl_putchar(ch)
int ch;
{
(void)putchar(ch);
}
#else
/*
* cl_putchar --
* Function version of putchar, for tputs.
*
* PUBLIC: int cl_putchar(int);
*/
int
cl_putchar(ch)
int ch;
{
return (putchar(ch));
}
#endif