diff options
Diffstat (limited to 'contrib/nvi/ex/ex_visual.c')
| -rw-r--r-- | contrib/nvi/ex/ex_visual.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/contrib/nvi/ex/ex_visual.c b/contrib/nvi/ex/ex_visual.c new file mode 100644 index 0000000..82e503d --- /dev/null +++ b/contrib/nvi/ex/ex_visual.c @@ -0,0 +1,161 @@ +/*- + * Copyright (c) 1992, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * Copyright (c) 1992, 1993, 1994, 1995, 1996 + * Keith Bostic. All rights reserved. + * + * See the LICENSE file for redistribution information. + */ + +#include "config.h" + +#ifndef lint +static const char sccsid[] = "@(#)ex_visual.c 10.13 (Berkeley) 6/28/96"; +#endif /* not lint */ + +#include <sys/types.h> +#include <sys/queue.h> +#include <sys/time.h> + +#include <bitstring.h> +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "../common/common.h" +#include "../vi/vi.h" + +/* + * ex_visual -- :[line] vi[sual] [^-.+] [window_size] [flags] + * Switch to visual mode. + * + * PUBLIC: int ex_visual __P((SCR *, EXCMD *)); + */ +int +ex_visual(sp, cmdp) + SCR *sp; + EXCMD *cmdp; +{ + SCR *tsp; + size_t len; + int pos; + char buf[256]; + + /* If open option off, disallow visual command. */ + if (!O_ISSET(sp, O_OPEN)) { + msgq(sp, M_ERR, + "175|The visual command requires that the open option be set"); + return (1); + } + + /* Move to the address. */ + sp->lno = cmdp->addr1.lno == 0 ? 1 : cmdp->addr1.lno; + + /* + * Push a command based on the line position flags. If no + * flag specified, the line goes at the top of the screen. + */ + switch (FL_ISSET(cmdp->iflags, + E_C_CARAT | E_C_DASH | E_C_DOT | E_C_PLUS)) { + case E_C_CARAT: + pos = '^'; + break; + case E_C_DASH: + pos = '-'; + break; + case E_C_DOT: + pos = '.'; + break; + case E_C_PLUS: + pos = '+'; + break; + default: + sp->frp->lno = sp->lno; + sp->frp->cno = 0; + (void)nonblank(sp, sp->lno, &sp->cno); + F_SET(sp->frp, FR_CURSORSET); + goto nopush; + } + + if (FL_ISSET(cmdp->iflags, E_C_COUNT)) + len = snprintf(buf, sizeof(buf), + "%luz%c%lu", sp->lno, pos, cmdp->count); + else + len = snprintf(buf, sizeof(buf), "%luz%c", sp->lno, pos); + (void)v_event_push(sp, NULL, buf, len, CH_NOMAP | CH_QUOTED); + + /* + * !!! + * Historically, if no line address was specified, the [p#l] flags + * caused the cursor to be moved to the last line of the file, which + * was then positioned as described above. This seems useless, so + * I haven't implemented it. + */ + switch (FL_ISSET(cmdp->iflags, E_C_HASH | E_C_LIST | E_C_PRINT)) { + case E_C_HASH: + O_SET(sp, O_NUMBER); + break; + case E_C_LIST: + O_SET(sp, O_LIST); + break; + case E_C_PRINT: + break; + } + +nopush: /* + * !!! + * You can call the visual part of the editor from within an ex + * global command. + * + * XXX + * Historically, undoing a visual session was a single undo command, + * i.e. you could undo all of the changes you made in visual mode. + * We don't get this right; I'm waiting for the new logging code to + * be available. + * + * It's explicit, don't have to wait for the user, unless there's + * already a reason to wait. + */ + if (!F_ISSET(sp, SC_SCR_EXWROTE)) + F_SET(sp, SC_EX_WAIT_NO); + + if (F_ISSET(sp, SC_EX_GLOBAL)) { + /* + * When the vi screen(s) exit, we don't want to lose our hold + * on this screen or this file, otherwise we're going to fail + * fairly spectacularly. + */ + ++sp->refcnt; + ++sp->ep->refcnt; + + /* + * Fake up a screen pointer -- vi doesn't get to change our + * underlying file, regardless. + */ + tsp = sp; + if (vi(&tsp)) + return (1); + + /* + * !!! + * Historically, if the user exited the vi screen(s) using an + * ex quit command (e.g. :wq, :q) ex/vi exited, it was only if + * they exited vi using the Q command that ex continued. Some + * early versions of nvi continued in ex regardless, but users + * didn't like the semantic. + * + * Reset the screen. + */ + if (ex_init(sp)) + return (1); + + /* Move out of the vi screen. */ + (void)ex_puts(sp, "\n"); + } else { + F_CLR(sp, SC_EX | SC_SCR_EX); + F_SET(sp, SC_VI); + } + return (0); +} |
