1 /* $OpenBSD: ex_visual.c,v 1.8 2009/10/27 23:59:47 deraadt 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 #include <sys/types.h> 15 #include <sys/queue.h> 16 #include <sys/time.h> 17 18 #include <bitstring.h> 19 #include <limits.h> 20 #include <stdio.h> 21 #include <stdlib.h> 22 #include <string.h> 23 #include <unistd.h> 24 25 #include "../common/common.h" 26 #include "../vi/vi.h" 27 28 /* 29 * ex_visual -- :[line] vi[sual] [^-.+] [window_size] [flags] 30 * Switch to visual mode. 31 * 32 * PUBLIC: int ex_visual(SCR *, EXCMD *); 33 */ 34 int 35 ex_visual(sp, cmdp) 36 SCR *sp; 37 EXCMD *cmdp; 38 { 39 SCR *tsp; 40 size_t len; 41 int pos; 42 char buf[256]; 43 44 /* If open option off, disallow visual command. */ 45 if (!O_ISSET(sp, O_OPEN)) { 46 msgq(sp, M_ERR, 47 "175|The visual command requires that the open option be set"); 48 return (1); 49 } 50 51 /* Move to the address. */ 52 sp->lno = cmdp->addr1.lno == 0 ? 1 : cmdp->addr1.lno; 53 54 /* 55 * Push a command based on the line position flags. If no 56 * flag specified, the line goes at the top of the screen. 57 */ 58 switch (FL_ISSET(cmdp->iflags, 59 E_C_CARAT | E_C_DASH | E_C_DOT | E_C_PLUS)) { 60 case E_C_CARAT: 61 pos = '^'; 62 break; 63 case E_C_DASH: 64 pos = '-'; 65 break; 66 case E_C_DOT: 67 pos = '.'; 68 break; 69 case E_C_PLUS: 70 pos = '+'; 71 break; 72 default: 73 sp->frp->lno = sp->lno; 74 sp->frp->cno = 0; 75 (void)nonblank(sp, sp->lno, &sp->cno); 76 F_SET(sp->frp, FR_CURSORSET); 77 goto nopush; 78 } 79 80 if (FL_ISSET(cmdp->iflags, E_C_COUNT)) 81 len = snprintf(buf, sizeof(buf), 82 "%luz%c%lu", (ulong)sp->lno, pos, cmdp->count); 83 else 84 len = snprintf(buf, sizeof(buf), "%luz%c", (ulong)sp->lno, pos); 85 if (len >= sizeof(buf)) 86 len = sizeof(buf) - 1; 87 (void)v_event_push(sp, NULL, buf, len, CH_NOMAP | CH_QUOTED); 88 89 /* 90 * !!! 91 * Historically, if no line address was specified, the [p#l] flags 92 * caused the cursor to be moved to the last line of the file, which 93 * was then positioned as described above. This seems useless, so 94 * I haven't implemented it. 95 */ 96 switch (FL_ISSET(cmdp->iflags, E_C_HASH | E_C_LIST | E_C_PRINT)) { 97 case E_C_HASH: 98 O_SET(sp, O_NUMBER); 99 break; 100 case E_C_LIST: 101 O_SET(sp, O_LIST); 102 break; 103 case E_C_PRINT: 104 break; 105 } 106 107 nopush: /* 108 * !!! 109 * You can call the visual part of the editor from within an ex 110 * global command. 111 * 112 * XXX 113 * Historically, undoing a visual session was a single undo command, 114 * i.e. you could undo all of the changes you made in visual mode. 115 * We don't get this right; I'm waiting for the new logging code to 116 * be available. 117 * 118 * It's explicit, don't have to wait for the user, unless there's 119 * already a reason to wait. 120 */ 121 if (!F_ISSET(sp, SC_SCR_EXWROTE)) 122 F_SET(sp, SC_EX_WAIT_NO); 123 124 if (F_ISSET(sp, SC_EX_GLOBAL)) { 125 /* 126 * When the vi screen(s) exit, we don't want to lose our hold 127 * on this screen or this file, otherwise we're going to fail 128 * fairly spectacularly. 129 */ 130 ++sp->refcnt; 131 ++sp->ep->refcnt; 132 133 /* 134 * Fake up a screen pointer -- vi doesn't get to change our 135 * underlying file, regardless. 136 */ 137 tsp = sp; 138 if (vi(&tsp)) 139 return (1); 140 141 /* 142 * !!! 143 * Historically, if the user exited the vi screen(s) using an 144 * ex quit command (e.g. :wq, :q) ex/vi exited, it was only if 145 * they exited vi using the Q command that ex continued. Some 146 * early versions of nvi continued in ex regardless, but users 147 * didn't like the semantic. 148 * 149 * Reset the screen. 150 */ 151 if (ex_init(sp)) 152 return (1); 153 154 /* Move out of the vi screen. */ 155 (void)ex_puts(sp, "\n"); 156 } else { 157 F_CLR(sp, SC_EX | SC_SCR_EX); 158 F_SET(sp, SC_VI); 159 } 160 return (0); 161 } 162