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/* $OpenBSD: ex_visual.c,v 1.10 2016/01/06 22:28:52 millert Exp $ */ |
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/*- |
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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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#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(SCR *, EXCMD *); |
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*/ |
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int |
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ex_visual(SCR *sp, 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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"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", (ulong)sp->lno, pos, cmdp->count); |
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else |
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len = snprintf(buf, sizeof(buf), "%luz%c", (ulong)sp->lno, pos); |
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if (len >= sizeof(buf)) |
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len = sizeof(buf) - 1; |
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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_WAIT_NO); |
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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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} |