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bdcbfde31e
Remove ancient SCCS tags from the tree, automated scripting, with two minor fixup to keep things compiling. All the common forms in the tree were removed with a perl script. Sponsored by: Netflix
207 lines
4.8 KiB
C
207 lines
4.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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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. 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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/*
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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 <ctype.h>
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#include <unistd.h>
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#include <wctype.h>
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#define _XOPEN_SOURCE_EXTENDED
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#include <curses.h>
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#include "talk.h"
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void display(xwin_t *, wchar_t *);
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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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* an argument of the form --foo at least once.
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*/
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int
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max(int a, int b)
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{
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return (a > b ? a : b);
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}
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static cchar_t *
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makecchar(wchar_t in)
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{
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static cchar_t cc;
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wchar_t wc[2];
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wc[0] = in;
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wc[1] = L'\0';
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if (setcchar(&cc, wc, A_NORMAL, 0, NULL) != OK)
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p_error("settchar(3) failure");
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return (&cc);
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}
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/*
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* Display a symbol 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(xwin_t *win, wchar_t *wc)
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{
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/*
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* Alas, can't use variables in C switch statement.
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* Workaround these 3 cases with goto.
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*/
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if (*wc == win->kill)
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goto kill;
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else if (*wc == win->cerase)
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goto cerase;
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else if (*wc == win->werase)
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goto werase;
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switch (*wc) {
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case L'\n':
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case L'\r':
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wadd_wch(win->x_win, makecchar(L'\n'));
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getyx(win->x_win, win->x_line, win->x_col);
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wrefresh(win->x_win);
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return;
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case 004:
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if (win == &my_win) {
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/* Ctrl-D clears the screen. */
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werase(my_win.x_win);
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getyx(my_win.x_win, my_win.x_line, my_win.x_col);
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wrefresh(my_win.x_win);
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werase(his_win.x_win);
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getyx(his_win.x_win, his_win.x_line, his_win.x_col);
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wrefresh(his_win.x_win);
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}
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return;
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/* Erase character. */
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case 010: /* BS */
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case 0177: /* DEL */
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cerase:
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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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wrefresh(win->x_win);
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return;
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case 027: /* ^W */
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werase:
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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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int endcol, xcol, 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 (int 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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wrefresh(win->x_win);
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return;
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}
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case 025: /* ^U */
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kill:
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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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wrefresh(win->x_win);
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return;
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case L'\f':
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if (win == &my_win)
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wrefresh(curscr);
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return;
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case L'\7':
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write(STDOUT_FILENO, wc, sizeof(*wc));
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return;
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}
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if (iswprint(*wc) || *wc == L'\t')
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wadd_wch(win->x_win, makecchar(*wc));
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else
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beep();
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getyx(win->x_win, win->x_line, win->x_col);
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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(WINDOW *win, int line, int col)
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{
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int oldline, oldcol;
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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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