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