2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)display.c 8.1 (Berkeley) 6/6/93
30 * $FreeBSD: src/usr.bin/talk/display.c,v 1.7 1999/08/28 01:06:11 peter Exp $
31 * $DragonFly: src/usr.bin/talk/display.c,v 1.4 2003/10/04 20:36:52 hmp Exp $
35 * The window 'manager', initializes curses and handles the actual
45 int curses_initialized = 0;
48 * max HAS to be a function, it is called with
49 * an argument of the form --foo at least once.
55 return (a > b ? a : b);
59 * Display some text on somebody's window, processing some control
60 * characters while we are at it.
63 display(xwin_t *win, char *text, int size)
68 for (i = 0; i < size; i++) {
69 if (*text == '\n' || *text == '\r') {
70 waddch(win->x_win, '\n');
71 getyx(win->x_win, win->x_line, win->x_col);
75 if (*text == 004 && win == &my_win) {
76 /* control-D clears the screen */
78 getyx(my_win.x_win, my_win.x_line, my_win.x_col);
79 wrefresh(my_win.x_win);
80 werase(his_win.x_win);
81 getyx(his_win.x_win, his_win.x_line, his_win.x_col);
82 wrefresh(his_win.x_win);
88 if ( *text == win->cerase
89 || *text == 010 /* BS */
90 || *text == 0177 /* DEL */
92 wmove(win->x_win, win->x_line, max(--win->x_col, 0));
93 getyx(win->x_win, win->x_line, win->x_col);
94 waddch(win->x_win, ' ');
95 wmove(win->x_win, win->x_line, win->x_col);
96 getyx(win->x_win, win->x_line, win->x_col);
101 * On word erase search backwards until we find
102 * the beginning of a word or the beginning of
105 if ( *text == win->werase
106 || *text == 027 /* ^W */
108 int endcol, xcol, ii, c;
113 c = readwin(win->x_win, win->x_line, xcol);
119 c = readwin(win->x_win, win->x_line, xcol);
124 wmove(win->x_win, win->x_line, xcol + 1);
125 for (ii = xcol + 1; ii < endcol; ii++)
126 waddch(win->x_win, ' ');
127 wmove(win->x_win, win->x_line, xcol + 1);
128 getyx(win->x_win, win->x_line, win->x_col);
133 if ( *text == win->kill
134 || *text == 025 /* ^U */
136 wmove(win->x_win, win->x_line, 0);
137 wclrtoeol(win->x_win);
138 getyx(win->x_win, win->x_line, win->x_col);
149 write(STDOUT_FILENO, text, 1);
153 if (!isprint((unsigned char)*text) && *text != '\t') {
154 waddch(win->x_win, '^');
155 getyx(win->x_win, win->x_line, win->x_col);
156 cch = (*text & 63) + 64;
157 waddch(win->x_win, cch);
159 waddch(win->x_win, (unsigned char)*text);
160 getyx(win->x_win, win->x_line, win->x_col);
163 wrefresh(win->x_win);
167 * Read the character at the indicated position in win
170 readwin(WINDOW *win, int line, int col)
175 getyx(win, oldline, oldcol);
176 wmove(win, line, col);
178 wmove(win, oldline, oldcol);