1 /* $NetBSD: ex_visual.c,v 1.2 2013/11/22 15:52:05 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 #ifndef lint 14 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 "; 15 #endif /* not lint */ 16 17 #include <sys/types.h> 18 #include <sys/queue.h> 19 #include <sys/time.h> 20 21 #include <bitstring.h> 22 #include <limits.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 #include <unistd.h> 27 28 #include "../common/common.h" 29 #include "../vi/vi.h" 30 31 /* 32 * ex_visual -- :[line] vi[sual] [^-.+] [window_size] [flags] 33 * Switch to visual mode. 34 * 35 * PUBLIC: int ex_visual __P((SCR *, EXCMD *)); 36 */ 37 int 38 ex_visual(SCR *sp, EXCMD *cmdp) 39 { 40 SCR *tsp; 41 size_t len; 42 int pos; 43 char buf[256]; 44 size_t wlen; 45 const CHAR_T *wp; 46 47 /* If open option off, disallow visual command. */ 48 if (!O_ISSET(sp, O_OPEN)) { 49 msgq(sp, M_ERR, 50 "175|The visual command requires that the open option be set"); 51 return (1); 52 } 53 54 /* Move to the address. */ 55 sp->lno = cmdp->addr1.lno == 0 ? 1 : cmdp->addr1.lno; 56 57 /* 58 * Push a command based on the line position flags. If no 59 * flag specified, the line goes at the top of the screen. 60 */ 61 switch (FL_ISSET(cmdp->iflags, 62 E_C_CARAT | E_C_DASH | E_C_DOT | E_C_PLUS)) { 63 case E_C_CARAT: 64 pos = '^'; 65 break; 66 case E_C_DASH: 67 pos = '-'; 68 break; 69 case E_C_DOT: 70 pos = '.'; 71 break; 72 case E_C_PLUS: 73 pos = '+'; 74 break; 75 default: 76 sp->frp->lno = sp->lno; 77 sp->frp->cno = 0; 78 (void)nonblank(sp, sp->lno, &sp->cno); 79 F_SET(sp->frp, FR_CURSORSET); 80 goto nopush; 81 } 82 83 if (FL_ISSET(cmdp->iflags, E_C_COUNT)) 84 len = snprintf(buf, sizeof(buf), 85 "%luz%c%lu", (unsigned long)sp->lno, pos, cmdp->count); 86 else 87 len = snprintf(buf, sizeof(buf), 88 "%luz%c", (unsigned long)sp->lno, pos); 89 CHAR2INT(sp, buf, len, wp, wlen); 90 (void)v_event_push(sp, NULL, wp, wlen, CH_NOMAP | CH_QUOTED); 91 92 /* 93 * !!! 94 * Historically, if no line address was specified, the [p#l] flags 95 * caused the cursor to be moved to the last line of the file, which 96 * was then positioned as described above. This seems useless, so 97 * I haven't implemented it. 98 */ 99 switch (FL_ISSET(cmdp->iflags, E_C_HASH | E_C_LIST | E_C_PRINT)) { 100 case E_C_HASH: 101 O_SET(sp, O_NUMBER); 102 break; 103 case E_C_LIST: 104 O_SET(sp, O_LIST); 105 break; 106 case E_C_PRINT: 107 break; 108 } 109 110 nopush: /* 111 * !!! 112 * You can call the visual part of the editor from within an ex 113 * global command. 114 * 115 * XXX 116 * Historically, undoing a visual session was a single undo command, 117 * i.e. you could undo all of the changes you made in visual mode. 118 * We don't get this right; I'm waiting for the new logging code to 119 * be available. 120 * 121 * It's explicit, don't have to wait for the user, unless there's 122 * already a reason to wait. 123 */ 124 if (!F_ISSET(sp, SC_SCR_EXWROTE)) 125 F_SET(sp, SC_EX_WAIT_NO); 126 127 if (F_ISSET(sp, SC_EX_GLOBAL)) { 128 /* 129 * When the vi screen(s) exit, we don't want to lose our hold 130 * on this screen or this file, otherwise we're going to fail 131 * fairly spectacularly. 132 */ 133 ++sp->refcnt; 134 ++sp->ep->refcnt; 135 /* XXXX where is this decremented ? */ 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