162 lines
3.7 KiB
C
162 lines
3.7 KiB
C
/*-
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1992, 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[] = "@(#)ex_visual.c 10.12 (Berkeley) 4/27/96";
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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 <limits.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 <unistd.h>
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#include "../common/common.h"
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#include "../vi/vi.h"
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/*
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* ex_visual -- :[line] vi[sual] [^-.+] [window_size] [flags]
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* Switch to visual mode.
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*
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* PUBLIC: int ex_visual __P((SCR *, EXCMD *));
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*/
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int
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ex_visual(sp, cmdp)
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SCR *sp;
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EXCMD *cmdp;
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{
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SCR *tsp;
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size_t len;
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int pos;
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char buf[256];
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/* If open option off, disallow visual command. */
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if (!O_ISSET(sp, O_OPEN)) {
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msgq(sp, M_ERR,
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"175|The visual command requires that the open option be set");
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return (1);
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}
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/* Move to the address. */
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sp->lno = cmdp->addr1.lno == 0 ? 1 : cmdp->addr1.lno;
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/*
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* Push a command based on the line position flags. If no
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* flag specified, the line goes at the top of the screen.
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*/
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switch (FL_ISSET(cmdp->iflags,
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E_C_CARAT | E_C_DASH | E_C_DOT | E_C_PLUS)) {
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case E_C_CARAT:
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pos = '^';
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break;
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case E_C_DASH:
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pos = '-';
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break;
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case E_C_DOT:
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pos = '.';
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break;
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case E_C_PLUS:
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pos = '+';
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break;
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default:
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sp->frp->lno = sp->lno;
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sp->frp->cno = 0;
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(void)nonblank(sp, sp->lno, &sp->cno);
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F_SET(sp->frp, FR_CURSORSET);
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goto nopush;
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}
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if (FL_ISSET(cmdp->iflags, E_C_COUNT))
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len = snprintf(buf, sizeof(buf),
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"%luz%c%lu", sp->lno, pos, cmdp->count);
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else
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len = snprintf(buf, sizeof(buf), "%luz%c", sp->lno, pos);
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(void)v_event_push(sp, NULL, buf, len, CH_NOMAP | CH_QUOTED);
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/*
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* !!!
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* Historically, if no line address was specified, the [p#l] flags
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* caused the cursor to be moved to the last line of the file, which
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* was then positioned as described above. This seems useless, so
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* I haven't implemented it.
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*/
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switch (FL_ISSET(cmdp->iflags, E_C_HASH | E_C_LIST | E_C_PRINT)) {
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case E_C_HASH:
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O_SET(sp, O_NUMBER);
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break;
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case E_C_LIST:
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O_SET(sp, O_LIST);
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break;
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case E_C_PRINT:
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break;
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}
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nopush: /*
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* !!!
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* You can call the visual part of the editor from within an ex
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* global command.
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*
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* XXX
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* Historically, undoing a visual session was a single undo command,
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* i.e. you could undo all of the changes you made in visual mode.
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* We don't get this right; I'm waiting for the new logging code to
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* be available.
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*
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* It's explicit, don't have to wait for the user, unless there's
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* already a reason to wait.
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*/
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if (!F_ISSET(sp, SC_SCR_EXWROTE))
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F_SET(sp, SC_EX_DONTWAIT);
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if (F_ISSET(sp, SC_EX_GLOBAL)) {
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/*
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* When the vi screen(s) exit, we don't want to lose our hold
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* on this screen or this file, otherwise we're going to fail
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* fairly spectacularly.
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*/
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++sp->refcnt;
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++sp->ep->refcnt;
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/*
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* Fake up a screen pointer -- vi doesn't get to change our
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* underlying file, regardless.
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*/
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tsp = sp;
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if (vi(&tsp))
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return (1);
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/*
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* !!!
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* Historically, if the user exited the vi screen(s) using an
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* ex quit command (e.g. :wq, :q) ex/vi exited, it was only if
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* they exited vi using the Q command that ex continued. Some
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* early versions of nvi continued in ex regardless, but users
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* didn't like the semantic.
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*
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* Reset the screen.
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*/
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if (ex_init(sp))
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return (1);
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/* Move out of the vi screen. */
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(void)ex_puts(sp, "\n");
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} else {
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F_CLR(sp, SC_EX | SC_SCR_EX);
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F_SET(sp, SC_VI);
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}
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return (0);
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}
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