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freebsd/usr.bin/vi/svi/svi_util.c
Sean Eric Fagan b2e899c41f Bringin in nvi 1.34.
Reviewed by:	Sean Eric Fagan
1994-08-18 01:14:32 +00:00

348 lines
7.9 KiB
C

/*-
* Copyright (c) 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)svi_util.c 8.55 (Berkeley) 8/17/94";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.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 "compat.h"
#include <curses.h>
#include <db.h>
#include <regex.h>
#include "vi.h"
#include "../vi/vcmd.h"
#include "excmd.h"
#include "svi_screen.h"
#include "../sex/sex_screen.h"
/*
* svi_bell --
* Ring the bell.
*/
void
svi_bell(sp)
SCR *sp;
{
#ifdef SYSV_CURSES
if (O_ISSET(sp, O_FLASH))
flash();
else
beep();
#else
if (O_ISSET(sp, O_FLASH) && SVP(sp)->VB != NULL) {
(void)tputs(SVP(sp)->VB, 1, vi_putchar);
(void)fflush(stdout);
} else
(void)write(STDOUT_FILENO, "\007", 1); /* '\a' */
#endif
F_CLR(sp, S_BELLSCHED);
}
/*
* svi_optchange --
* Screen specific "option changed" routine.
*/
int
svi_optchange(sp, opt)
SCR *sp;
int opt;
{
switch (opt) {
case O_TERM:
/* Toss any saved visual bell information. */
if (SVP(sp)->VB != NULL) {
FREE(SVP(sp)->VB, strlen(SVP(sp)->VB) + 1);
SVP(sp)->VB = NULL;
}
/* Reset the screen size. */
if (sp->s_window(sp, 0))
return (1);
F_SET(sp, S_RESIZE);
break;
case O_WINDOW:
if (svi_crel(sp, O_VAL(sp, O_WINDOW)))
return (1);
break;
}
(void)v_optchange(sp, opt);
(void)ex_optchange(sp, opt);
return (0);
}
/*
* svi_busy --
* Put the cursor somewhere so the user will think we're busy.
*/
int
svi_busy(sp, msg)
SCR *sp;
char const *msg;
{
/*
* search.c:f_search() is called from ex/ex_tag.c:ex_tagfirst(),
* which runs before the screen really exists. Make sure we don't
* step on anything.
*
* If the terminal isn't initialized, there's nothing to do.
*/
if (!F_ISSET(SVP(sp), SVI_CURSES_INIT))
return (0);
MOVE(sp, INFOLINE(sp), 0);
if (msg) {
ADDSTR(msg);
clrtoeol();
}
refresh();
F_SET(SVP(sp), SVI_CUR_INVALID);
return (0);
}
/*
* svi_keypad --
* Put the keypad/cursor arrows into or out of application mode.
*/
void
svi_keypad(sp, on)
SCR *sp;
int on;
{
#ifdef SYSV_CURSES
keypad(stdscr, on ? TRUE : FALSE);
#else
char *sbp, *t, sbuf[128];
sbp = sbuf;
if ((t = tgetstr(on ? "ks" : "ke", &sbp)) == NULL)
return;
(void)tputs(t, 0, vi_putchar);
(void)fflush(stdout);
#endif
}
/*
* svi_clear --
* Clear from the row down to the end of the screen.
*/
int
svi_clear(sp)
SCR *sp;
{
size_t oldy, oldx, row;
getyx(stdscr, oldy, oldx);
for (row = SVP(sp)->srows - 1; row >= oldy; --row) {
MOVEA(sp, row, 0);
clrtoeol();
}
MOVEA(sp, oldy, oldx);
refresh();
return (0);
}
/*
* svi_suspend --
* Suspend an svi screen.
*
* See signal.c for a long discussion of what's going on here. Let
* me put it this way, it's NOT my fault.
*/
int
svi_suspend(sp)
SCR *sp;
{
struct termios sv_term;
sigset_t set;
int oldx, oldy, rval;
char *sbp, *t, sbuf[128];
rval = 0;
/*
* Block SIGALRM, because vi uses timers to decide when to paint
* busy messages on the screen.
*/
(void)sigemptyset(&set);
(void)sigaddset(&set, SIGALRM);
if (sigprocmask(SIG_BLOCK, &set, NULL)) {
msgq(sp, M_SYSERR, "suspend: sigblock");
return (1);
}
/* Save the current cursor position. */
getyx(stdscr, oldy, oldx);
/*
* Move the cursor to the bottom of the screen.
*
* XXX
* Some curses implementations don't turn off inverse video when
* standend() is called, waiting to see what the next character is
* going to be, instead. Write a character to force inverse video
* off, and then clear the line.
*/
MOVE(sp, INFOLINE(sp), 0);
ADDCH('.');
refresh();
MOVE(sp, INFOLINE(sp), 0);
clrtoeol();
refresh();
/* Restore the cursor keys to normal mode. */
svi_keypad(sp, 0);
/* Send VE/TE. */
#ifdef SYSV_CURSES
if ((t = tigetstr("cnorm")) != NULL && t != (char *)-1)
(void)tputs(t, 0, vi_putchar);
if ((t = tigetstr("rmcup")) != NULL && t != (char *)-1)
(void)tputs(t, 0, vi_putchar);
#else
sbp = sbuf;
if ((t = tgetstr("ve", &sbp)) != NULL)
(void)tputs(t, 0, vi_putchar);
sbp = sbuf;
if ((t = tgetstr("te", &sbp)) != NULL)
(void)tputs(t, 0, vi_putchar);
#endif
(void)fflush(stdout);
/* Save current terminal settings, and restore the original ones. */
if (tcgetattr(STDIN_FILENO, &sv_term)) {
msgq(sp, M_SYSERR, "suspend: tcgetattr");
return (1);
}
if (tcsetattr(STDIN_FILENO,
TCSASOFT | TCSADRAIN, &sp->gp->original_termios)) {
msgq(sp, M_SYSERR, "suspend: tcsetattr original");
return (1);
}
/* Push out any waiting messages. */
(void)write(STDOUT_FILENO, "\n", 1);
(void)sex_refresh(sp, sp->ep);
/* Stop the process group. */
if (kill(0, SIGTSTP)) {
msgq(sp, M_SYSERR, "suspend: kill");
rval = 1;
}
/* Time passes ... */
/* Restore current terminal settings. */
if (tcsetattr(STDIN_FILENO, TCSASOFT | TCSADRAIN, &sv_term)) {
msgq(sp, M_SYSERR, "suspend: tcsetattr current");
rval = 1;
}
/* Send TI/VS. */
#ifdef SYSV_CURSES
if ((t = tigetstr("smcup")) != NULL && t != (char *)-1)
(void)tputs(t, 0, vi_putchar);
if ((t = tigetstr("cvvis")) != NULL && t != (char *)-1)
(void)tputs(t, 0, vi_putchar);
#else
sbp = sbuf;
if ((t = tgetstr("ti", &sbp)) != NULL)
(void)tputs(t, 0, vi_putchar);
sbp = sbuf;
if ((t = tgetstr("vs", &sbp)) != NULL)
(void)tputs(t, 0, vi_putchar);
#endif
(void)fflush(stdout);
/* Put the cursor keys into application mode. */
svi_keypad(sp, 1);
/*
* If the screen changed size, do a full refresh. Otherwise,
* System V has curses repaint it. 4BSD curses will repaint
* it in the wrefresh() call below.
*/
if (!sp->s_window(sp, 1))
(void)sp->s_refresh(sp, sp->ep);
#ifdef SYSV_CURSES
else
redrawwin(stdscr);
#endif
/*
* Restore the cursor.
*
* !!!
* Don't use MOVE/MOVEA, we don't want to return without resetting
* the signals, regardless.
*/
(void)move(oldy, oldx);
(void)wrefresh(curscr);
/* Reset the signals. */
if (sigprocmask(SIG_UNBLOCK, &set, NULL)) {
msgq(sp, M_SYSERR, "suspend: sigblock");
rval = 1;
}
return (rval);
}
/*
* svi_gdbrefresh --
* Stub routine so can flush out screen changes using gdb.
*/
#ifdef DEBUG
int
svi_gdbrefresh()
{
refresh();
return (0);
}
#endif