651 lines
16 KiB
C
651 lines
16 KiB
C
/*-
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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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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)svi_ex.c 8.56 (Berkeley) 8/17/94";
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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 <errno.h>
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#include <limits.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 "compat.h"
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#include <curses.h>
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#include <db.h>
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#include <regex.h>
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#include "vi.h"
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#include "../vi/vcmd.h"
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#include "excmd.h"
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#include "svi_screen.h"
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#include "../sex/sex_screen.h"
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static int svi_ex_divider __P((SCR *));
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static int svi_ex_done __P((SCR *, EXF *, MARK *));
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static int svi_ex_inv __P((SCR *));
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static int svi_ex_scroll __P((SCR *, int, CH *));
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#define MSGS_WAITING(sp) \
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((sp)->msgq.lh_first != NULL && \
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!F_ISSET((sp)->msgq.lh_first, M_EMPTY))
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/*
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* svi_ex_cmd --
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* Execute an ex command.
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*/
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int
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svi_ex_cmd(sp, ep, exp, rp)
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SCR *sp;
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EXF *ep;
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EXCMDARG *exp;
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MARK *rp;
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{
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SVI_PRIVATE *svp;
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int rval;
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svp = SVP(sp);
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svp->exlcontinue = svp->exlinecount = svp->extotalcount = 0;
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(void)svi_busy(sp, NULL);
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rval = exp->cmd->fn(sp, ep, exp);
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(void)msg_rpt(sp, 0);
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(void)ex_fflush(EXCOOKIE);
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/*
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* If displayed anything, figure out if we have to wait. If the
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* screen wasn't trashed, only one line output and there are no
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* waiting messages, don't wait, but don't overwrite it with mode
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* information either.
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*/
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if (svp->extotalcount > 0)
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if (!F_ISSET(sp, S_REFRESH) &&
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svp->extotalcount == 1 && !MSGS_WAITING(sp)) {
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F_SET(sp, S_UPDATE_MODE);
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if (sp->q.cqe_next != (void *)&sp->gp->dq)
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(void)svi_ex_inv(sp);
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} else {
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/* This message isn't interruptible. */
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F_CLR(sp, S_INTERRUPTIBLE);
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(void)svi_ex_scroll(sp, 1, NULL);
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}
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return (svi_ex_done(sp, ep, rp) || rval);
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}
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/*
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* svi_ex_run --
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* Execute strings of ex commands.
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*/
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int
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svi_ex_run(sp, ep, rp)
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SCR *sp;
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EXF *ep;
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MARK *rp;
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{
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enum input (*get) __P((SCR *, EXF *, TEXTH *, ARG_CHAR_T, u_int));
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struct termios t;
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CH ikey;
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SVI_PRIVATE *svp;
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TEXT *tp;
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int flags, in_exmode, rval;
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svp = SVP(sp);
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svp->exlcontinue = svp->exlinecount = svp->extotalcount = 0;
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/*
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* There's some tricky stuff going on here to handle when a user has
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* mapped a key to multiple ex commands. Historic practice was that
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* vi ran without any special actions, as if the user were entering
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* the characters, until ex trashed the screen, e.g. something like a
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* '!' command. At that point, we no longer know what the screen
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* looks like, so we can't afford to overwrite anything. The solution
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* is to go into real ex mode until we get to the end of the command
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* strings.
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*/
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get = svi_get;
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flags = TXT_BS | TXT_PROMPT;
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for (in_exmode = rval = 0;;) {
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/*
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* Get the next command. Interrupt flag manipulation is safe
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* because ex_icmd clears them all.
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*/
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F_SET(sp, S_INTERRUPTIBLE);
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if (get(sp, ep, sp->tiqp, ':', flags) != INP_OK) {
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rval = 1;
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break;
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}
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if (INTERRUPTED(sp))
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break;
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/*
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* Len is 0 if the user backspaced over the prompt,
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* 1 if only a CR was entered.
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*/
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tp = sp->tiqp->cqh_first;
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if (tp->len == 0)
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break;
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if (!in_exmode)
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(void)svi_busy(sp, NULL);
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/* Ignore return, presumably an error message was displayed. */
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(void)ex_icmd(sp, ep, tp->lb, tp->len, 0);
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(void)ex_fflush(EXCOOKIE);
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/*
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* The file or screen may have changed, in which case, the
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* main editor loop takes care of it.
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*/
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if (F_ISSET(sp, S_MAJOR_CHANGE))
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break;
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/*
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* If continue not required, and one or no lines, and there
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* are no waiting messages, don't wait, but don't overwrite
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* it with mode information either.
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*/
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if (!F_ISSET(sp, S_CONTINUE) && (svp->extotalcount == 0 ||
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svp->extotalcount == 1 && !MSGS_WAITING(sp))) {
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if (svp->extotalcount == 1) {
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F_SET(sp, S_UPDATE_MODE);
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if (sp->q.cqe_next != (void *)&sp->gp->dq)
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svi_ex_inv(sp);
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}
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break;
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}
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if (INTERRUPTED(sp))
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break;
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/*
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* If the screen is trashed, or there are messages waiting,
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* go into ex mode.
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*/
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if (!in_exmode &&
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(F_ISSET(sp, S_REFRESH) || MSGS_WAITING(sp))) {
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/* Initialize the terminal state. */
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if (F_ISSET(sp->gp, G_STDIN_TTY))
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SEX_RAW(t);
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get = sex_get;
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flags = TXT_CR | TXT_NLECHO | TXT_PROMPT;
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in_exmode = 1;
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}
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/* Display any waiting messages. */
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if (MSGS_WAITING(sp))
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(void)sex_refresh(sp, ep);
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/*
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* Get a continue character; users may continue in ex mode by
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* entering a ':'.
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*
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* !!!
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* Historic practice is that any key can be used to continue.
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* Nvi used to require that the user enter a <carriage-return>
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* or <newline>, but this broke historic users.
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*/
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if (in_exmode) {
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(void)write(STDOUT_FILENO,
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STR_CMSG, sizeof(STR_CMSG) - 1);
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if (term_key(sp, &ikey, 0) != INP_OK) {
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rval = 1;
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goto ret;
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}
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} else {
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/* This message isn't interruptible. */
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F_CLR(sp, S_INTERRUPTIBLE);
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(void)svi_ex_scroll(sp, 1, &ikey);
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}
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if (ikey.ch != ':')
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break;
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if (in_exmode)
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(void)write(STDOUT_FILENO, "\n", 1);
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else {
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++svp->extotalcount;
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++svp->exlinecount;
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}
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}
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ret: if (in_exmode) {
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/* Reset the terminal state. */
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if (F_ISSET(sp->gp, G_STDIN_TTY) && SEX_NORAW(t))
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rval = 1;
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F_SET(sp, S_REFRESH);
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} else
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if (svi_ex_done(sp, ep, rp))
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rval = 1;
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F_CLR(sp, S_CONTINUE);
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return (rval);
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}
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/*
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* svi_msgflush --
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* Flush any accumulated messages.
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*/
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int
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svi_msgflush(sp)
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SCR *sp;
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{
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enum {INVERSE, NORMAL} inverse;
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SVI_PRIVATE *svp;
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MSG *mp;
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int rval;
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svp = SVP(sp);
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svp->exlcontinue = svp->exlinecount = svp->extotalcount = 0;
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/*
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* XXX
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* S_IVIDEO is a bit of a kluge. We can only pass a single magic
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* cookie into the svi_ex_write routine, and it has to be the SCR
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* structure. So, the inverse video bit has to be there.
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*/
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inverse = NORMAL;
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for (mp = sp->msgq.lh_first;
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mp != NULL && !F_ISSET(mp, M_EMPTY); mp = mp->q.le_next) {
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/*
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* If the second and subsequent messages fit on the current
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* line, write a separator. Otherwise, put out a newline
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* and break the line.
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*/
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if (mp != sp->msgq.lh_first)
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if (mp->len + svp->exlcontinue + 3 >= sp->cols) {
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if (inverse == INVERSE)
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F_SET(sp, S_IVIDEO);
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(void)svi_ex_write(sp, ".\n", 2);
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F_CLR(sp, S_IVIDEO);
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} else {
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if (inverse == INVERSE)
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F_SET(sp, S_IVIDEO);
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(void)svi_ex_write(sp, ";", 1);
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F_CLR(sp, S_IVIDEO);
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(void)svi_ex_write(sp, " ", 2);
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}
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inverse = F_ISSET(mp, M_INV_VIDEO) ? INVERSE : NORMAL;
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if (inverse == INVERSE)
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F_SET(sp, S_IVIDEO);
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(void)svi_ex_write(sp, mp->mbuf, mp->len);
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F_CLR(sp, S_IVIDEO);
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F_SET(mp, M_EMPTY);
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}
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/*
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* None of the messages end with periods, we do it in the message
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* flush routine, which makes it possible to join messages.
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*/
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if (inverse == INVERSE)
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F_SET(sp, S_IVIDEO);
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(void)svi_ex_write(sp, ".", 1);
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F_CLR(sp, S_IVIDEO);
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/*
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* Figure out if we have to wait. Don't wait for only one line,
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* but don't overwrite it with mode information either.
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*/
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if (svp->extotalcount == 1) {
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F_SET(sp, S_UPDATE_MODE);
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if (sp->q.cqe_next != (void *)&sp->gp->dq)
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svi_ex_inv(sp);
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return (0);
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}
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rval = svi_ex_scroll(sp, 1, NULL);
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if (svi_ex_done(sp, sp->ep, NULL))
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rval = 1;
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MOVE(sp, INFOLINE(sp), 0);
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clrtoeol();
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return (rval);
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}
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/*
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* svi_ex_done --
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* Cleanup from dipping into ex.
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*/
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static int
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svi_ex_done(sp, ep, rp)
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SCR *sp;
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EXF *ep;
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MARK *rp;
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{
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SMAP *smp;
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SVI_PRIVATE *svp;
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recno_t lno;
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size_t cnt, len;
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/*
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* The file or screen may have changed, in which case,
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* the main editor loop takes care of it.
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*/
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if (F_ISSET(sp, S_MAJOR_CHANGE))
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return (0);
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/*
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* Otherwise, the only cursor modifications will be real, however, the
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* underlying line may have changed; don't trust anything. This code
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* has been a remarkably fertile place for bugs.
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*
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* Repaint the entire screen if at least half the screen is trashed.
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* Else, repaint only over the overwritten lines. The "-2" comes
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* from one for the mode line and one for the fact that it's an offset.
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* Note the check for small screens.
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*
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* Don't trust ANYTHING.
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*/
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svp = SVP(sp);
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if (svp->extotalcount >= HALFTEXT(sp))
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F_SET(sp, S_REDRAW);
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else
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for (cnt = sp->rows - 2; svp->extotalcount--; --cnt)
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if (cnt > sp->t_rows) {
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MOVE(sp, cnt, 0);
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clrtoeol();
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} else {
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smp = HMAP + cnt;
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SMAP_FLUSH(smp);
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if (svi_line(sp, ep, smp, NULL, NULL))
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return (1);
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}
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/* Ignore the cursor if the caller doesn't care. */
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if (rp == NULL)
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return (0);
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/*
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* Do a reality check on a cursor value, and make sure it's okay.
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* If necessary, change it. Ex keeps track of the line number,
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* but it doesn't care about the column and it may have disappeared.
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*/
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if (file_gline(sp, ep, sp->lno, &len) == NULL) {
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if (file_lline(sp, ep, &lno))
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return (1);
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if (lno != 0)
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GETLINE_ERR(sp, sp->lno);
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sp->lno = 1;
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sp->cno = 0;
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} else if (sp->cno >= len)
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sp->cno = len ? len - 1 : 0;
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rp->lno = sp->lno;
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rp->cno = sp->cno;
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return (0);
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}
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/*
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* svi_ex_write --
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* Write out the ex messages.
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*/
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int
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svi_ex_write(cookie, line, llen)
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void *cookie;
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const char *line;
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int llen;
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{
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SCR *sp;
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SVI_PRIVATE *svp;
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size_t oldy, oldx;
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int len, rlen, tlen;
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const char *p, *t;
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/*
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* XXX
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* If it's a 4.4BSD system, we could just use fpurge(3).
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* This shouldn't be too expensive, though.
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*/
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sp = cookie;
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svp = SVP(sp);
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if (INTERRUPTED(sp))
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return (llen);
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p = line; /* In case of a write of 0. */
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for (rlen = llen; llen;) {
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/* Get the next line. */
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if ((p = memchr(line, '\n', llen)) == NULL)
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len = llen;
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else
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len = p - line;
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/*
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* The max is sp->cols characters, and we may
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* have already written part of the line.
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*/
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if (len + svp->exlcontinue > sp->cols)
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len = sp->cols - svp->exlcontinue;
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/*
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* If the first line output, do nothing.
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* If the second line output, draw the divider line.
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* If drew a full screen, remove the divider line.
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* If it's a continuation line, move to the continuation
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* point, else, move the screen up.
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*/
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if (svp->exlcontinue == 0) {
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if (svp->extotalcount == 1) {
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MOVE(sp, INFOLINE(sp) - 1, 0);
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clrtoeol();
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if (svi_ex_divider(sp))
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return (-1);
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F_SET(svp, SVI_DIVIDER);
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++svp->extotalcount;
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++svp->exlinecount;
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}
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if (svp->extotalcount == sp->t_maxrows &&
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F_ISSET(svp, SVI_DIVIDER)) {
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--svp->extotalcount;
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--svp->exlinecount;
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F_CLR(svp, SVI_DIVIDER);
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}
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if (svp->extotalcount != 0 &&
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svi_ex_scroll(sp, 0, NULL))
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return (-1);
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MOVE(sp, INFOLINE(sp), 0);
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++svp->extotalcount;
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++svp->exlinecount;
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if (F_ISSET(sp, S_INTERRUPTIBLE) && INTERRUPTED(sp))
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break;
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} else
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MOVE(sp, INFOLINE(sp), svp->exlcontinue);
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/* Display the line, doing character translation. */
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if (F_ISSET(sp, S_IVIDEO))
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standout();
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for (t = line, tlen = len; tlen--; ++t)
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ADDCH(*t);
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if (F_ISSET(sp, S_IVIDEO))
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standend();
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/* Clear to EOL. */
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getyx(stdscr, oldy, oldx);
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if (oldx < sp->cols)
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clrtoeol();
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/* If we loop, it's a new line. */
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svp->exlcontinue = 0;
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/* Reset for the next line. */
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line += len;
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llen -= len;
|
|
if (p != NULL) {
|
|
++line;
|
|
--llen;
|
|
}
|
|
}
|
|
/* Refresh the screen, even if it's a partial. */
|
|
refresh();
|
|
|
|
/* Set up next continuation line. */
|
|
if (p == NULL)
|
|
getyx(stdscr, oldy, svp->exlcontinue);
|
|
return (rlen);
|
|
}
|
|
|
|
/*
|
|
* svi_ex_scroll --
|
|
* Scroll the screen for ex output.
|
|
*/
|
|
static int
|
|
svi_ex_scroll(sp, mustwait, chp)
|
|
SCR *sp;
|
|
int mustwait;
|
|
CH *chp;
|
|
{
|
|
CH ikey;
|
|
SVI_PRIVATE *svp;
|
|
|
|
/*
|
|
* Scroll the screen. Instead of scrolling the entire screen, delete
|
|
* the line above the first line output so preserve the maximum amount
|
|
* of the screen.
|
|
*/
|
|
svp = SVP(sp);
|
|
if (svp->extotalcount >= sp->rows) {
|
|
MOVE(sp, 0, 0);
|
|
} else
|
|
MOVE(sp, INFOLINE(sp) - svp->extotalcount, 0);
|
|
|
|
deleteln();
|
|
|
|
/* If there are screens below us, push them back into place. */
|
|
if (sp->q.cqe_next != (void *)&sp->gp->dq) {
|
|
MOVE(sp, INFOLINE(sp), 0);
|
|
insertln();
|
|
}
|
|
|
|
/* If just displayed a full screen, wait. */
|
|
if (mustwait || svp->exlinecount == sp->t_maxrows) {
|
|
MOVE(sp, INFOLINE(sp), 0);
|
|
if (F_ISSET(sp, S_INTERRUPTIBLE)) {
|
|
ADDNSTR(STR_QMSG, (int)sizeof(STR_QMSG) - 1);
|
|
} else {
|
|
ADDNSTR(STR_CMSG, (int)sizeof(STR_CMSG) - 1);
|
|
}
|
|
clrtoeol();
|
|
refresh();
|
|
/*
|
|
* !!!
|
|
* Historic practice is that any key can be used to continue.
|
|
* Nvi used to require that the user enter a <carriage-return>
|
|
* or <newline>, but this broke historic users.
|
|
*/
|
|
if (term_key(sp, &ikey, 0) != INP_OK)
|
|
return (-1);
|
|
if (ikey.ch == CH_QUIT && F_ISSET(sp, S_INTERRUPTIBLE))
|
|
F_SET(sp, S_INTERRUPTED);
|
|
if (chp != NULL)
|
|
*chp = ikey;
|
|
svp->exlinecount = 0;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* svi_ex_inv --
|
|
* Change whatever is on the info line to inverse video so we have
|
|
* a divider line between split screens.
|
|
*/
|
|
static int
|
|
svi_ex_inv(sp)
|
|
SCR *sp;
|
|
{
|
|
CHAR_T ch;
|
|
size_t spcnt, col, row;
|
|
|
|
row = INFOLINE(sp);
|
|
|
|
/*
|
|
* Walk through the line, retrieving each character and writing
|
|
* it back out in inverse video. Since curses doesn't have an
|
|
* EOL marker, only put out trailing spaces if we find another
|
|
* character.
|
|
*
|
|
* XXX
|
|
* This is a major kluge -- curses should have an interface
|
|
* that allows us to change attributes on a per line basis.
|
|
*/
|
|
MOVE(sp, row, 0);
|
|
standout();
|
|
for (spcnt = col = 0;;) {
|
|
ch = winch(stdscr);
|
|
if (isspace(ch)) {
|
|
++spcnt;
|
|
if (++col >= sp->cols)
|
|
break;
|
|
MOVE(sp, row, col);
|
|
} else {
|
|
if (spcnt) {
|
|
MOVE(sp, row, col - spcnt);
|
|
for (; spcnt > 0; --spcnt)
|
|
ADDCH(' ');
|
|
}
|
|
ADDCH(ch);
|
|
if (++col >= sp->cols)
|
|
break;
|
|
}
|
|
}
|
|
standend();
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* svi_ex_divider --
|
|
* Draw a dividing line between the screens.
|
|
*/
|
|
static int
|
|
svi_ex_divider(sp)
|
|
SCR *sp;
|
|
{
|
|
size_t len;
|
|
|
|
#define DIVIDESTR "+=+=+=+=+=+=+=+"
|
|
len = sizeof(DIVIDESTR) - 1 > sp->cols ?
|
|
sp->cols : sizeof(DIVIDESTR) - 1;
|
|
standout();
|
|
ADDNSTR(DIVIDESTR, len);
|
|
standend();
|
|
return (0);
|
|
}
|