651 lines
14 KiB
C
651 lines
14 KiB
C
/* $NetBSD: cl_funcs.c,v 1.3 2000/05/31 19:49:23 jdc Exp $ */
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/*-
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* Copyright (c) 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1993, 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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*
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* See the LICENSE file for redistribution information.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "@(#)cl_funcs.c 10.40 (Berkeley) 5/16/96";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/time.h>
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#include <bitstring.h>
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#include <ctype.h>
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#include <curses.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include "../common/common.h"
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#include "../vi/vi.h"
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#include "cl.h"
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/*
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* cl_addstr --
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* Add len bytes from the string at the cursor, advancing the cursor.
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*
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* PUBLIC: int cl_addstr __P((SCR *, const char *, size_t));
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*/
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int
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cl_addstr(sp, str, len)
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SCR *sp;
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const char *str;
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size_t len;
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{
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CL_PRIVATE *clp;
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size_t oldy, oldx;
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int iv;
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clp = CLP(sp);
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/*
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* If ex isn't in control, it's the last line of the screen and
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* it's a split screen, use inverse video.
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*/
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iv = 0;
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getyx(stdscr, oldy, oldx);
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if (!F_ISSET(sp, SC_SCR_EXWROTE) &&
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oldy == RLNO(sp, LASTLINE(sp)) && IS_SPLIT(sp)) {
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iv = 1;
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(void)standout();
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}
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if (addnstr(str, len) == ERR)
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return (1);
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if (iv)
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(void)standend();
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return (0);
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}
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/*
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* cl_attr --
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* Toggle a screen attribute on/off.
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*
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* PUBLIC: int cl_attr __P((SCR *, scr_attr_t, int));
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*/
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int
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cl_attr(sp, attribute, on)
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SCR *sp;
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scr_attr_t attribute;
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int on;
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{
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CL_PRIVATE *clp;
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clp = CLP(sp);
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switch (attribute) {
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case SA_ALTERNATE:
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/*
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* !!!
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* There's a major layering violation here. The problem is that the
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* X11 xterm screen has what's known as an "alternate" screen. Some
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* xterm termcap/terminfo entries include sequences to switch to/from
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* that alternate screen as part of the ti/te (smcup/rmcup) strings.
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* Vi runs in the alternate screen, so that you are returned to the
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* same screen contents on exit from vi that you had when you entered
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* vi. Further, when you run :shell, or :!date or similar ex commands,
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* you also see the original screen contents. This wasn't deliberate
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* on vi's part, it's just that it historically sent terminal init/end
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* sequences at those times, and the addition of the alternate screen
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* sequences to the strings changed the behavior of vi. The problem
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* caused by this is that we don't want to switch back to the alternate
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* screen while getting a new command from the user, when the user is
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* continuing to enter ex commands, e.g.:
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*
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* :!date <<< switch to original screen
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* [Hit return to continue] <<< prompt user to continue
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* :command <<< get command from user
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*
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* Note that the :command input is a true vi input mode, e.g., input
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* maps and abbreviations are being done. So, we need to be able to
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* switch back into the vi screen mode, without flashing the screen.
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*
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* To make matters worse, the curses initscr() and endwin() calls will
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* do this automatically -- so, this attribute isn't as controlled by
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* the higher level screen as closely as one might like.
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*/
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if (on) {
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if (clp->ti_te != TI_SENT) {
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clp->ti_te = TI_SENT;
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if (clp->smcup == NULL)
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(void)cl_getcap(sp, "smcup", &clp->smcup);
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if (clp->smcup != NULL)
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(void)tputs(clp->smcup, 1, cl_putchar);
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}
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} else
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if (clp->ti_te != TE_SENT) {
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clp->ti_te = TE_SENT;
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if (clp->rmcup == NULL)
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(void)cl_getcap(sp, "rmcup", &clp->rmcup);
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if (clp->rmcup != NULL)
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(void)tputs(clp->rmcup, 1, cl_putchar);
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(void)fflush(stdout);
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}
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(void)fflush(stdout);
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break;
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case SA_INVERSE:
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if (F_ISSET(sp, SC_EX | SC_SCR_EXWROTE)) {
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if (clp->smso == NULL)
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return (1);
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if (on)
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(void)tputs(clp->smso, 1, cl_putchar);
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else
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(void)tputs(clp->rmso, 1, cl_putchar);
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(void)fflush(stdout);
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} else {
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if (on)
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(void)standout();
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else
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(void)standend();
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}
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break;
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default:
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abort();
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}
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return (0);
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}
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/*
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* cl_baud --
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* Return the baud rate.
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*
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* PUBLIC: int cl_baud __P((SCR *, u_long *));
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*/
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int
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cl_baud(sp, ratep)
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SCR *sp;
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u_long *ratep;
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{
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CL_PRIVATE *clp;
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/*
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* XXX
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* There's no portable way to get a "baud rate" -- cfgetospeed(3)
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* returns the value associated with some #define, which we may
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* never have heard of, or which may be a purely local speed. Vi
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* only cares if it's SLOW (w300), slow (w1200) or fast (w9600).
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* Try and detect the slow ones, and default to fast.
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*/
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clp = CLP(sp);
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switch (cfgetospeed(&clp->orig)) {
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case B50:
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case B75:
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case B110:
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case B134:
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case B150:
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case B200:
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case B300:
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case B600:
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*ratep = 600;
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break;
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case B1200:
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*ratep = 1200;
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break;
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default:
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*ratep = 9600;
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break;
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}
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return (0);
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}
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/*
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* cl_bell --
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* Ring the bell/flash the screen.
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*
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* PUBLIC: int cl_bell __P((SCR *));
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*/
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int
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cl_bell(sp)
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SCR *sp;
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{
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if (F_ISSET(sp, SC_EX | SC_SCR_EXWROTE))
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(void)write(STDOUT_FILENO, "\07", 1); /* \a */
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else {
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/*
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* Vi has an edit option which determines if the terminal
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* should be beeped or the screen flashed.
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*/
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if (O_ISSET(sp, O_FLASH))
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(void)flash();
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else
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(void)beep();
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}
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return (0);
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}
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/*
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* cl_clrtoeol --
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* Clear from the current cursor to the end of the line.
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*
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* PUBLIC: int cl_clrtoeol __P((SCR *));
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*/
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int
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cl_clrtoeol(sp)
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SCR *sp;
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{
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return (clrtoeol() == ERR);
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}
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/*
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* cl_cursor --
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* Return the current cursor position.
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*
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* PUBLIC: int cl_cursor __P((SCR *, size_t *, size_t *));
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*/
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int
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cl_cursor(sp, yp, xp)
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SCR *sp;
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size_t *yp, *xp;
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{
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/*
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* The curses screen support splits a single underlying curses screen
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* into multiple screens to support split screen semantics. For this
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* reason the returned value must be adjusted to be relative to the
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* current screen, and not absolute. Screens that implement the split
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* using physically distinct screens won't need this hack.
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*/
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getyx(stdscr, *yp, *xp);
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*yp -= sp->woff;
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return (0);
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}
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/*
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* cl_deleteln --
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* Delete the current line, scrolling all lines below it.
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*
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* PUBLIC: int cl_deleteln __P((SCR *));
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*/
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int
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cl_deleteln(sp)
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SCR *sp;
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{
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CHAR_T ch;
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CL_PRIVATE *clp;
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size_t col, lno, spcnt, oldy, oldx;
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clp = CLP(sp);
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/*
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* This clause is required because the curses screen uses reverse
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* video to delimit split screens. If the screen does not do this,
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* this code won't be necessary.
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*
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* If the bottom line was in reverse video, rewrite it in normal
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* video before it's scrolled.
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*
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* Check for the existence of a chgat function; XSI requires it, but
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* historic implementations of System V curses don't. If it's not
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* a #define, we'll fall back to doing it by hand, which is slow but
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* acceptable.
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*
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* By hand means walking through the line, retrieving and rewriting
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* each character. Curses has no EOL marker, so track strings of
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* spaces, and copy the trailing spaces only if there's a non-space
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* character following.
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*/
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if (!F_ISSET(sp, SC_SCR_EXWROTE) && IS_SPLIT(sp)) {
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getyx(stdscr, oldy, oldx);
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#ifdef mvchgat
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mvchgat(RLNO(sp, LASTLINE(sp)), 0, -1, A_NORMAL, 0, NULL);
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#else
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for (lno = RLNO(sp, LASTLINE(sp)), col = spcnt = 0;;) {
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(void)move(lno, col);
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ch = winch(stdscr);
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if (isblank(ch))
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++spcnt;
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else {
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(void)move(lno, col - spcnt);
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for (; spcnt > 0; --spcnt)
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(void)addch(' ');
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(void)addch(ch);
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}
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if (++col >= sp->cols)
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break;
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}
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#endif
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(void)move(oldy, oldx);
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}
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/*
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* The bottom line is expected to be blank after this operation,
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* and other screens must support that semantic.
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*/
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return (deleteln() == ERR);
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}
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/*
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* cl_ex_adjust --
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* Adjust the screen for ex. This routine is purely for standalone
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* ex programs. All special purpose, all special case.
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*
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* PUBLIC: int cl_ex_adjust __P((SCR *, exadj_t));
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*/
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int
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cl_ex_adjust(sp, action)
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SCR *sp;
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exadj_t action;
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{
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CL_PRIVATE *clp;
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int cnt;
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clp = CLP(sp);
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switch (action) {
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case EX_TERM_SCROLL:
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/* Move the cursor up one line if that's possible. */
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if (clp->cuu1 != NULL)
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(void)tputs(clp->cuu1, 1, cl_putchar);
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else if (clp->cup != NULL)
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(void)tputs(tgoto(clp->cup,
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0, LINES - 2), 1, cl_putchar);
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else
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return (0);
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/* FALLTHROUGH */
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case EX_TERM_CE:
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/* Clear the line. */
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if (clp->el != NULL) {
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(void)putchar('\r');
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(void)tputs(clp->el, 1, cl_putchar);
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} else {
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/*
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* Historically, ex didn't erase the line, so, if the
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* displayed line was only a single glyph, and <eof>
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* was more than one glyph, the output would not fully
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* overwrite the user's input. To fix this, output
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* the maxiumum character number of spaces. Note,
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* this won't help if the user entered extra prompt
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* or <blank> characters before the command character.
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* We'd have to do a lot of work to make that work, and
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* it's almost certainly not worth the effort.
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*/
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for (cnt = 0; cnt < MAX_CHARACTER_COLUMNS; ++cnt)
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(void)putchar('\b');
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for (cnt = 0; cnt < MAX_CHARACTER_COLUMNS; ++cnt)
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(void)putchar(' ');
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(void)putchar('\r');
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(void)fflush(stdout);
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}
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break;
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default:
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abort();
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}
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return (0);
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}
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/*
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* cl_insertln --
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* Push down the current line, discarding the bottom line.
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*
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* PUBLIC: int cl_insertln __P((SCR *));
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*/
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int
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cl_insertln(sp)
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SCR *sp;
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{
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/*
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* The current line is expected to be blank after this operation,
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* and the screen must support that semantic.
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*/
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return (insertln() == ERR);
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}
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/*
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* cl_keyval --
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* Return the value for a special key.
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*
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* PUBLIC: int cl_keyval __P((SCR *, scr_keyval_t, CHAR_T *, int *));
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*/
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int
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cl_keyval(sp, val, chp, dnep)
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SCR *sp;
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scr_keyval_t val;
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CHAR_T *chp;
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int *dnep;
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{
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CL_PRIVATE *clp;
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/*
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* VEOF, VERASE and VKILL are required by POSIX 1003.1-1990,
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* VWERASE is a 4BSD extension.
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*/
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clp = CLP(sp);
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switch (val) {
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case KEY_VEOF:
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*dnep = (*chp = clp->orig.c_cc[VEOF]) == _POSIX_VDISABLE;
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break;
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case KEY_VERASE:
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*dnep = (*chp = clp->orig.c_cc[VERASE]) == _POSIX_VDISABLE;
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break;
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case KEY_VKILL:
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*dnep = (*chp = clp->orig.c_cc[VKILL]) == _POSIX_VDISABLE;
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break;
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#ifdef VWERASE
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case KEY_VWERASE:
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*dnep = (*chp = clp->orig.c_cc[VWERASE]) == _POSIX_VDISABLE;
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break;
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#endif
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default:
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*dnep = 1;
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break;
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}
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return (0);
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}
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/*
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* cl_move --
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* Move the cursor.
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*
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* PUBLIC: int cl_move __P((SCR *, size_t, size_t));
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*/
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int
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cl_move(sp, lno, cno)
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SCR *sp;
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size_t lno, cno;
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{
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/* See the comment in cl_cursor. */
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if (move(RLNO(sp, lno), cno) == ERR) {
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msgq(sp, M_ERR,
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"Error: move: l(%u) c(%u) o(%u)", lno, cno, sp->woff);
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return (1);
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}
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return (0);
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}
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/*
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* cl_refresh --
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* Refresh the screen.
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*
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* PUBLIC: int cl_refresh __P((SCR *, int));
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*/
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int
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cl_refresh(sp, repaint)
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SCR *sp;
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int repaint;
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{
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/*
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* If repaint is set, the editor is telling us that we don't know
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* what's on the screen, so we have to repaint from scratch.
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*
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* In the curses library, doing wrefresh(curscr) is okay, but the
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* screen flashes when we then apply the refresh() to bring it up
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* to date. So, use clearok().
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*/
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if (repaint)
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clearok(curscr, 1);
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return (refresh() == ERR);
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}
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/*
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* cl_rename --
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* Rename the file.
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*
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* PUBLIC: int cl_rename __P((SCR *));
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*/
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int
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cl_rename(sp)
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SCR *sp;
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{
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return (0); /* Curses doesn't care. */
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}
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/*
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* cl_suspend --
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* Suspend a screen.
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*
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* PUBLIC: int cl_suspend __P((SCR *, int *));
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*/
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int
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cl_suspend(sp, allowedp)
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SCR *sp;
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int *allowedp;
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{
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struct termios t;
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CL_PRIVATE *clp;
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GS *gp;
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size_t oldy, oldx;
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int changed;
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gp = sp->gp;
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clp = CLP(sp);
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*allowedp = 1;
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/*
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* The ex implementation of this function isn't needed by screens not
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* supporting ex commands that require full terminal canonical mode
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* (e.g. :suspend).
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*
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* The vi implementation of this function isn't needed by screens not
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* supporting vi process suspension, i.e. any screen that isn't backed
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* by a UNIX shell.
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*
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* Setting allowedp to 0 will cause the editor to reject the command.
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*/
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if (F_ISSET(sp, SC_EX)) {
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/* Save the terminal settings, and restore the original ones. */
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if (F_ISSET(gp, G_STDIN_TTY)) {
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(void)tcgetattr(STDIN_FILENO, &t);
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(void)tcsetattr(STDIN_FILENO,
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TCSASOFT | TCSADRAIN, &clp->orig);
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}
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|
|
/* Stop the process group. */
|
|
(void)kill(0, SIGTSTP);
|
|
|
|
/* Time passes ... */
|
|
|
|
/* Restore terminal settings. */
|
|
if (F_ISSET(gp, G_STDIN_TTY))
|
|
(void)tcsetattr(STDIN_FILENO, TCSASOFT | TCSADRAIN, &t);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Move to the lower left-hand corner of the screen.
|
|
*
|
|
* XXX
|
|
* Not sure this is necessary in System V implementations, but it
|
|
* shouldn't hurt.
|
|
*/
|
|
getyx(stdscr, oldy, oldx);
|
|
(void)move(LINES - 1, 0);
|
|
(void)refresh();
|
|
|
|
/*
|
|
* Temporarily end the screen. System V introduced a semantic where
|
|
* endwin() could be restarted. We use it because restarting curses
|
|
* from scratch often fails in System V. 4BSD curses didn't support
|
|
* restarting after endwin(), so we have to do what clean up we can
|
|
* without calling it.
|
|
*/
|
|
#ifdef HAVE_BSD_CURSES
|
|
/* Save the terminal settings. */
|
|
(void)tcgetattr(STDIN_FILENO, &t);
|
|
#endif
|
|
|
|
/* Restore the cursor keys to normal mode. */
|
|
(void)keypad(stdscr, FALSE);
|
|
|
|
#ifdef HAVE_BSD_CURSES
|
|
(void)cl_attr(sp, SA_ALTERNATE, 0);
|
|
#else
|
|
(void)endwin();
|
|
#endif
|
|
/*
|
|
* XXX
|
|
* Restore the original terminal settings. This is bad -- the
|
|
* reset can cause character loss from the tty queue. However,
|
|
* we can't call endwin() in BSD curses implementations, and too
|
|
* many System V curses implementations don't get it right.
|
|
*/
|
|
(void)tcsetattr(STDIN_FILENO, TCSADRAIN | TCSASOFT, &clp->orig);
|
|
|
|
/* Stop the process group. */
|
|
(void)kill(0, SIGTSTP);
|
|
|
|
/* Time passes ... */
|
|
|
|
#ifdef HAVE_BSD_CURSES
|
|
/* Restore terminal settings. */
|
|
if (F_ISSET(gp, G_STDIN_TTY))
|
|
(void)tcsetattr(STDIN_FILENO, TCSASOFT | TCSADRAIN, &t);
|
|
|
|
(void)cl_attr(sp, SA_ALTERNATE, 1);
|
|
#endif
|
|
/* Put the cursor keys into application mode. */
|
|
(void)keypad(stdscr, TRUE);
|
|
|
|
/* Refresh and repaint the screen. */
|
|
(void)move(oldy, oldx);
|
|
(void)cl_refresh(sp, 1);
|
|
|
|
/* If the screen changed size, set the SIGWINCH bit. */
|
|
if (cl_ssize(sp, 1, NULL, NULL, &changed))
|
|
return (1);
|
|
if (changed)
|
|
F_SET(CLP(sp), CL_SIGWINCH);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* cl_usage --
|
|
* Print out the curses usage messages.
|
|
*
|
|
* PUBLIC: void cl_usage __P((void));
|
|
*/
|
|
void
|
|
cl_usage()
|
|
{
|
|
#define USAGE "\
|
|
usage: ex [-eFRrsv] [-c command] [-t tag] [-w size] [file ...]\n\
|
|
usage: vi [-eFlRrv] [-c command] [-t tag] [-w size] [file ...]\n"
|
|
(void)fprintf(stderr, "%s", USAGE);
|
|
#undef USAGE
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/*
|
|
* gdbrefresh --
|
|
* Stub routine so can flush out curses screen changes using gdb.
|
|
*/
|
|
int
|
|
gdbrefresh()
|
|
{
|
|
refresh();
|
|
return (0); /* XXX Convince gdb to run it. */
|
|
}
|
|
#endif
|