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20868061ee
add usage().
184 lines
4.8 KiB
C
184 lines
4.8 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)display.c 8.1 (Berkeley) 6/6/93";
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#endif
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static const char rcsid[] =
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"$Id$";
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#endif /* not lint */
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/*
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* The window 'manager', initializes curses and handles the actual
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* displaying of text
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*/
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#include "talk.h"
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#include <ctype.h>
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xwin_t my_win;
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xwin_t his_win;
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WINDOW *line_win;
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int curses_initialized = 0;
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/*
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* max HAS to be a function, it is called with
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* a argument of the form --foo at least once.
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*/
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int
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max(a,b)
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int a, b;
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{
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return (a > b ? a : b);
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}
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/*
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* Display some text on somebody's window, processing some control
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* characters while we are at it.
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*/
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void
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display(win, text, size)
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register xwin_t *win;
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register char *text;
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int size;
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{
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register int i;
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char cch;
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for (i = 0; i < size; i++) {
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if (*text == '\n' || *text == '\r') {
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waddch(win->x_win, '\n');
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getyx(win->x_win, win->x_line, win->x_col);
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text++;
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continue;
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}
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/* erase character */
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if ( *text == win->cerase
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|| *text == 010 /* BS */
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|| *text == 0177 /* DEL */
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) {
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wmove(win->x_win, win->x_line, max(--win->x_col, 0));
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getyx(win->x_win, win->x_line, win->x_col);
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waddch(win->x_win, ' ');
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wmove(win->x_win, win->x_line, win->x_col);
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getyx(win->x_win, win->x_line, win->x_col);
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text++;
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continue;
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}
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/*
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* On word erase search backwards until we find
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* the beginning of a word or the beginning of
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* the line.
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*/
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if ( *text == win->werase
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|| *text == 027 /* ^W */
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) {
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int endcol, xcol, i, c;
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endcol = win->x_col;
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xcol = endcol - 1;
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while (xcol >= 0) {
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c = readwin(win->x_win, win->x_line, xcol);
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if (c != ' ')
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break;
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xcol--;
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}
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while (xcol >= 0) {
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c = readwin(win->x_win, win->x_line, xcol);
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if (c == ' ')
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break;
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xcol--;
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}
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wmove(win->x_win, win->x_line, xcol + 1);
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for (i = xcol + 1; i < endcol; i++)
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waddch(win->x_win, ' ');
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wmove(win->x_win, win->x_line, xcol + 1);
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getyx(win->x_win, win->x_line, win->x_col);
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text++;
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continue;
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}
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/* line kill */
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if ( *text == win->kill
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|| *text == 025 /* ^U */
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) {
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wmove(win->x_win, win->x_line, 0);
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wclrtoeol(win->x_win);
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getyx(win->x_win, win->x_line, win->x_col);
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text++;
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continue;
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}
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if (*text == '\f') {
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if (win == &my_win)
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wrefresh(curscr);
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text++;
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continue;
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}
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if (*text == '\7') {
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write(STDOUT_FILENO, text, 1);
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text++;
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continue;
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}
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if (!isprint((unsigned char)*text) && *text != '\t') {
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waddch(win->x_win, '^');
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getyx(win->x_win, win->x_line, win->x_col);
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cch = (*text & 63) + 64;
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waddch(win->x_win, cch);
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} else
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waddch(win->x_win, (unsigned char)*text);
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getyx(win->x_win, win->x_line, win->x_col);
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text++;
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}
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wrefresh(win->x_win);
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}
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/*
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* Read the character at the indicated position in win
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*/
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int
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readwin(win, line, col)
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WINDOW *win;
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int line;
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int col;
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{
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int oldline, oldcol;
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register int c;
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getyx(win, oldline, oldcol);
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wmove(win, line, col);
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c = winch(win);
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wmove(win, oldline, oldcol);
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return (c);
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}
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