1 /* $NetBSD: ex_visual.c,v 1.3 2014/01/26 21:43:45 christos Exp $ */
2 /*-
3 * Copyright (c) 1992, 1993, 1994
4 * The Regents of the University of California. All rights reserved.
5 * Copyright (c) 1992, 1993, 1994, 1995, 1996
6 * Keith Bostic. All rights reserved.
7 *
8 * See the LICENSE file for redistribution information.
9 */
10
11 #include "config.h"
12
13 #include <sys/cdefs.h>
14 #if 0
15 #ifndef lint
16 static const char sccsid[] = "Id: ex_visual.c,v 10.16 2001/08/29 11:04:13 skimo Exp (Berkeley) Date: 2001/08/29 11:04:13 ";
17 #endif /* not lint */
18 #else
19 __RCSID("$NetBSD: ex_visual.c,v 1.3 2014/01/26 21:43:45 christos Exp $");
20 #endif
21
22 #include <sys/types.h>
23 #include <sys/queue.h>
24 #include <sys/time.h>
25
26 #include <bitstring.h>
27 #include <limits.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <unistd.h>
32
33 #include "../common/common.h"
34 #include "../vi/vi.h"
35
36 /*
37 * ex_visual -- :[line] vi[sual] [^-.+] [window_size] [flags]
38 * Switch to visual mode.
39 *
40 * PUBLIC: int ex_visual __P((SCR *, EXCMD *));
41 */
42 int
ex_visual(SCR * sp,EXCMD * cmdp)43 ex_visual(SCR *sp, EXCMD *cmdp)
44 {
45 SCR *tsp;
46 size_t len;
47 int pos;
48 char buf[256];
49 size_t wlen;
50 const CHAR_T *wp;
51
52 /* If open option off, disallow visual command. */
53 if (!O_ISSET(sp, O_OPEN)) {
54 msgq(sp, M_ERR,
55 "175|The visual command requires that the open option be set");
56 return (1);
57 }
58
59 /* Move to the address. */
60 sp->lno = cmdp->addr1.lno == 0 ? 1 : cmdp->addr1.lno;
61
62 /*
63 * Push a command based on the line position flags. If no
64 * flag specified, the line goes at the top of the screen.
65 */
66 switch (FL_ISSET(cmdp->iflags,
67 E_C_CARAT | E_C_DASH | E_C_DOT | E_C_PLUS)) {
68 case E_C_CARAT:
69 pos = '^';
70 break;
71 case E_C_DASH:
72 pos = '-';
73 break;
74 case E_C_DOT:
75 pos = '.';
76 break;
77 case E_C_PLUS:
78 pos = '+';
79 break;
80 default:
81 sp->frp->lno = sp->lno;
82 sp->frp->cno = 0;
83 (void)nonblank(sp, sp->lno, &sp->cno);
84 F_SET(sp->frp, FR_CURSORSET);
85 goto nopush;
86 }
87
88 if (FL_ISSET(cmdp->iflags, E_C_COUNT))
89 len = snprintf(buf, sizeof(buf),
90 "%luz%c%lu", (unsigned long)sp->lno, pos, cmdp->count);
91 else
92 len = snprintf(buf, sizeof(buf),
93 "%luz%c", (unsigned long)sp->lno, pos);
94 CHAR2INT(sp, buf, len, wp, wlen);
95 (void)v_event_push(sp, NULL, wp, wlen, CH_NOMAP | CH_QUOTED);
96
97 /*
98 * !!!
99 * Historically, if no line address was specified, the [p#l] flags
100 * caused the cursor to be moved to the last line of the file, which
101 * was then positioned as described above. This seems useless, so
102 * I haven't implemented it.
103 */
104 switch (FL_ISSET(cmdp->iflags, E_C_HASH | E_C_LIST | E_C_PRINT)) {
105 case E_C_HASH:
106 O_SET(sp, O_NUMBER);
107 break;
108 case E_C_LIST:
109 O_SET(sp, O_LIST);
110 break;
111 case E_C_PRINT:
112 break;
113 }
114
115 nopush: /*
116 * !!!
117 * You can call the visual part of the editor from within an ex
118 * global command.
119 *
120 * XXX
121 * Historically, undoing a visual session was a single undo command,
122 * i.e. you could undo all of the changes you made in visual mode.
123 * We don't get this right; I'm waiting for the new logging code to
124 * be available.
125 *
126 * It's explicit, don't have to wait for the user, unless there's
127 * already a reason to wait.
128 */
129 if (!F_ISSET(sp, SC_SCR_EXWROTE))
130 F_SET(sp, SC_EX_WAIT_NO);
131
132 if (F_ISSET(sp, SC_EX_GLOBAL)) {
133 /*
134 * When the vi screen(s) exit, we don't want to lose our hold
135 * on this screen or this file, otherwise we're going to fail
136 * fairly spectacularly.
137 */
138 ++sp->refcnt;
139 ++sp->ep->refcnt;
140 /* XXXX where is this decremented ? */
141
142 /*
143 * Fake up a screen pointer -- vi doesn't get to change our
144 * underlying file, regardless.
145 */
146 tsp = sp;
147 if (vi(&tsp))
148 return (1);
149
150 /*
151 * !!!
152 * Historically, if the user exited the vi screen(s) using an
153 * ex quit command (e.g. :wq, :q) ex/vi exited, it was only if
154 * they exited vi using the Q command that ex continued. Some
155 * early versions of nvi continued in ex regardless, but users
156 * didn't like the semantic.
157 *
158 * Reset the screen.
159 */
160 if (ex_init(sp))
161 return (1);
162
163 /* Move out of the vi screen. */
164 (void)ex_puts(sp, "\n");
165 } else {
166 F_CLR(sp, SC_EX | SC_SCR_EX);
167 F_SET(sp, SC_VI);
168 }
169 return (0);
170 }
171