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 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