1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1994 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 #pragma ident "%Z%%M% %I% %E% SMI" 41 42 /* 43 * The window 'manager', initializes curses and handles the actual 44 * displaying of text 45 */ 46 47 #include "talk.h" 48 #include <ctype.h> 49 50 static int readwin(WINDOW *, int, int); 51 static void xscroll(register xwin_t *, int); 52 53 xwin_t my_win; 54 xwin_t rem_win; 55 WINDOW *line_win; 56 57 int curses_initialized = 0; 58 59 /* 60 * max HAS to be a function, it is called with 61 * a argument of the form --foo at least once. 62 */ 63 64 static int 65 max(a, b) 66 int a, b; 67 { 68 if (a > b) { 69 return (a); 70 } else { 71 return (b); 72 } 73 } 74 75 /* 76 * Display some text on somebody's window, processing some control 77 * characters while we are at it. 78 */ 79 80 int 81 display(win, text, size) 82 register xwin_t *win; 83 register char *text; 84 int size; 85 { 86 register int i; 87 int mb_cur_max = MB_CUR_MAX; 88 89 for (i = 0; i < size; i++) { 90 int itext; 91 92 if (*text == '\n'|| *text == '\r') { 93 xscroll(win, 0); 94 text++; 95 continue; 96 } 97 98 /* erase character */ 99 100 if (*text == win->cerase) { 101 wmove(win->x_win, win->x_line, max(--win->x_col, 0)); 102 getyx(win->x_win, win->x_line, win->x_col); 103 waddch(win->x_win, ' '); 104 wmove(win->x_win, win->x_line, win->x_col); 105 getyx(win->x_win, win->x_line, win->x_col); 106 text++; 107 continue; 108 } 109 /* 110 * On word erase search backwards until we find 111 * the beginning of a word or the beginning of 112 * the line. 113 */ 114 if (*text == win->werase) { 115 int endcol, xcol, i, c; 116 117 endcol = win->x_col; 118 xcol = endcol - 1; 119 while (xcol >= 0) { 120 c = readwin(win->x_win, win->x_line, xcol); 121 if (c != ' ') 122 break; 123 xcol--; 124 } 125 while (xcol >= 0) { 126 c = readwin(win->x_win, win->x_line, xcol); 127 if (c == ' ') 128 break; 129 xcol--; 130 } 131 wmove(win->x_win, win->x_line, xcol + 1); 132 for (i = xcol + 1; i < endcol; i++) 133 waddch(win->x_win, ' '); 134 wmove(win->x_win, win->x_line, xcol + 1); 135 getyx(win->x_win, win->x_line, win->x_col); 136 continue; 137 } 138 /* line kill */ 139 if (*text == win->kill) { 140 wmove(win->x_win, win->x_line, 0); 141 wclrtoeol(win->x_win); 142 getyx(win->x_win, win->x_line, win->x_col); 143 text++; 144 continue; 145 } 146 if (*text == '\f') { 147 if (win == &my_win) 148 wrefresh(curscr); 149 text++; 150 continue; 151 } 152 /* EOF character */ 153 if (*text == '\004') { 154 quit(); 155 } 156 157 /* typing alert character will alert recipient's terminal */ 158 159 if (*text == '\007') { 160 beep(); 161 continue; 162 } 163 164 /* check for wrap around */ 165 if (win->x_col == COLS-1) { 166 xscroll(win, 0); 167 } 168 169 /* 170 * Handle the multibyte case 171 * We print '?' for nonprintable widechars. 172 */ 173 174 if (mb_cur_max > 1 && mblen(text, mb_cur_max) > 1) { 175 wchar_t wc; 176 int len; 177 178 len = mbtowc(&wc, text, mb_cur_max); 179 180 if (iswprint(wc) || iswspace(wc)) { 181 /* its printable, put out the bytes */ 182 do { 183 if (win->x_col == COLS-1) /* wraparound */ 184 xscroll(win, 0); 185 waddch(win->x_win, *text++); 186 getyx(win->x_win, win->x_line, win->x_col); 187 } while (--len > 0); 188 continue; 189 } 190 /* 191 * otherwise, punt and print a question mark. 192 */ 193 text += len; 194 waddch(win->x_win, '?'); 195 getyx(win->x_win, win->x_line, win->x_col); 196 continue; 197 } 198 199 itext = (unsigned int) *text; 200 if (isprint(itext) || *text == ' ' || *text == '\t' || 201 *text == '\013' || *text == '\007' /* bell */) { 202 waddch(win->x_win, *text); 203 } else { 204 205 if (!isascii(*text)) { 206 /* check for wrap around */ 207 if (win->x_col == COLS-3) { 208 xscroll(win, 0); 209 } 210 waddch(win->x_win, 'M'); 211 waddch(win->x_win, '-'); 212 *text = toascii(*text); 213 } 214 if (iscntrl(*text)) { 215 216 /* check for wrap around */ 217 getyx(win->x_win, win->x_line, win->x_col); 218 if (win->x_col == COLS-2) { 219 xscroll(win, 0); 220 } 221 222 waddch(win->x_win, '^'); 223 waddch(win->x_win, *text + 0100); 224 } 225 else 226 waddch(win->x_win, *text); 227 } 228 229 getyx(win->x_win, win->x_line, win->x_col); 230 text++; 231 232 } /* for loop */ 233 wrefresh(win->x_win); 234 return (0); 235 } 236 237 /* 238 * Read the character at the indicated position in win 239 */ 240 241 static int 242 readwin(win, line, col) 243 WINDOW *win; 244 int line, col; 245 { 246 int oldline, oldcol; 247 register int c; 248 249 getyx(win, oldline, oldcol); 250 wmove(win, line, col); 251 c = winch(win); 252 wmove(win, oldline, oldcol); 253 return (c); 254 } 255 256 /* 257 * Scroll a window, blanking out the line following the current line 258 * so that the current position is obvious 259 */ 260 261 static void 262 xscroll(win, flag) 263 register xwin_t *win; 264 int flag; 265 { 266 if (flag == -1) { 267 wmove(win->x_win, 0, 0); 268 win->x_line = 0; 269 win->x_col = 0; 270 return; 271 } 272 win->x_line = (win->x_line + 1) % win->x_nlines; 273 win->x_col = 0; 274 wmove(win->x_win, win->x_line, win->x_col); 275 wclrtoeol(win->x_win); 276 wmove(win->x_win, (win->x_line + 1) % win->x_nlines, win->x_col); 277 wclrtoeol(win->x_win); 278 wmove(win->x_win, win->x_line, win->x_col); 279 } 280