1 /* $OpenBSD: ex_visual.c,v 1.5 2001/01/29 01:58:45 niklas Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 1992, 1993, 1994, 1995, 1996 7 * Keith Bostic. All rights reserved. 8 * 9 * See the LICENSE file for redistribution information. 10 */ 11 12 #include "config.h" 13 14 #ifndef lint 15 static const char sccsid[] = "@(#)ex_visual.c 10.13 (Berkeley) 6/28/96"; 16 #endif /* not lint */ 17 18 #include <sys/types.h> 19 #include <sys/queue.h> 20 #include <sys/time.h> 21 22 #include <bitstring.h> 23 #include <limits.h> 24 #include <stdio.h> 25 #include <stdlib.h> 26 #include <string.h> 27 #include <unistd.h> 28 29 #include "../common/common.h" 30 #include "../vi/vi.h" 31 32 /* 33 * ex_visual -- :[line] vi[sual] [^-.+] [window_size] [flags] 34 * Switch to visual mode. 35 * 36 * PUBLIC: int ex_visual __P((SCR *, EXCMD *)); 37 */ 38 int 39 ex_visual(sp, cmdp) 40 SCR *sp; 41 EXCMD *cmdp; 42 { 43 SCR *tsp; 44 size_t len; 45 int pos; 46 char buf[256]; 47 48 /* If open option off, disallow visual command. */ 49 if (!O_ISSET(sp, O_OPEN)) { 50 msgq(sp, M_ERR, 51 "175|The visual command requires that the open option be set"); 52 return (1); 53 } 54 55 /* Move to the address. */ 56 sp->lno = cmdp->addr1.lno == 0 ? 1 : cmdp->addr1.lno; 57 58 /* 59 * Push a command based on the line position flags. If no 60 * flag specified, the line goes at the top of the screen. 61 */ 62 switch (FL_ISSET(cmdp->iflags, 63 E_C_CARAT | E_C_DASH | E_C_DOT | E_C_PLUS)) { 64 case E_C_CARAT: 65 pos = '^'; 66 break; 67 case E_C_DASH: 68 pos = '-'; 69 break; 70 case E_C_DOT: 71 pos = '.'; 72 break; 73 case E_C_PLUS: 74 pos = '+'; 75 break; 76 default: 77 sp->frp->lno = sp->lno; 78 sp->frp->cno = 0; 79 (void)nonblank(sp, sp->lno, &sp->cno); 80 F_SET(sp->frp, FR_CURSORSET); 81 goto nopush; 82 } 83 84 if (FL_ISSET(cmdp->iflags, E_C_COUNT)) 85 len = snprintf(buf, sizeof(buf), 86 "%luz%c%lu", sp->lno, pos, cmdp->count); 87 else 88 len = snprintf(buf, sizeof(buf), "%luz%c", sp->lno, pos); 89 if (len >= sizeof(buf)) 90 len = sizeof(buf) - 1; 91 (void)v_event_push(sp, NULL, buf, len, CH_NOMAP | CH_QUOTED); 92 93 /* 94 * !!! 95 * Historically, if no line address was specified, the [p#l] flags 96 * caused the cursor to be moved to the last line of the file, which 97 * was then positioned as described above. This seems useless, so 98 * I haven't implemented it. 99 */ 100 switch (FL_ISSET(cmdp->iflags, E_C_HASH | E_C_LIST | E_C_PRINT)) { 101 case E_C_HASH: 102 O_SET(sp, O_NUMBER); 103 break; 104 case E_C_LIST: 105 O_SET(sp, O_LIST); 106 break; 107 case E_C_PRINT: 108 break; 109 } 110 111 nopush: /* 112 * !!! 113 * You can call the visual part of the editor from within an ex 114 * global command. 115 * 116 * XXX 117 * Historically, undoing a visual session was a single undo command, 118 * i.e. you could undo all of the changes you made in visual mode. 119 * We don't get this right; I'm waiting for the new logging code to 120 * be available. 121 * 122 * It's explicit, don't have to wait for the user, unless there's 123 * already a reason to wait. 124 */ 125 if (!F_ISSET(sp, SC_SCR_EXWROTE)) 126 F_SET(sp, SC_EX_WAIT_NO); 127 128 if (F_ISSET(sp, SC_EX_GLOBAL)) { 129 /* 130 * When the vi screen(s) exit, we don't want to lose our hold 131 * on this screen or this file, otherwise we're going to fail 132 * fairly spectacularly. 133 */ 134 ++sp->refcnt; 135 ++sp->ep->refcnt; 136 137 /* 138 * Fake up a screen pointer -- vi doesn't get to change our 139 * underlying file, regardless. 140 */ 141 tsp = sp; 142 if (vi(&tsp)) 143 return (1); 144 145 /* 146 * !!! 147 * Historically, if the user exited the vi screen(s) using an 148 * ex quit command (e.g. :wq, :q) ex/vi exited, it was only if 149 * they exited vi using the Q command that ex continued. Some 150 * early versions of nvi continued in ex regardless, but users 151 * didn't like the semantic. 152 * 153 * Reset the screen. 154 */ 155 if (ex_init(sp)) 156 return (1); 157 158 /* Move out of the vi screen. */ 159 (void)ex_puts(sp, "\n"); 160 } else { 161 F_CLR(sp, SC_EX | SC_SCR_EX); 162 F_SET(sp, SC_VI); 163 } 164 return (0); 165 } 166