diff options
Diffstat (limited to 'remote_cmds/talk.tproj/display.c')
| -rw-r--r-- | remote_cmds/talk.tproj/display.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/remote_cmds/talk.tproj/display.c b/remote_cmds/talk.tproj/display.c new file mode 100644 index 0000000..2815ec1 --- /dev/null +++ b/remote_cmds/talk.tproj/display.c @@ -0,0 +1,198 @@ +/* + * Copyright (c) 1983, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> + +#ifndef __APPLE__ +__FBSDID("$FreeBSD: src/usr.bin/talk/display.c,v 1.11 2003/07/04 20:44:25 luigi Exp $"); + +#ifndef lint +static const char sccsid[] = "@(#)display.c 8.1 (Berkeley) 6/6/93"; +#endif +#endif /* __APPLE__ */ + +/* + * The window 'manager', initializes curses and handles the actual + * displaying of text + */ +#include <ctype.h> + +#include "talk.h" + +xwin_t my_win; +xwin_t his_win; +WINDOW *line_win; + +int curses_initialized = 0; + +/* + * max HAS to be a function, it is called with + * an argument of the form --foo at least once. + */ +int +max(a,b) + int a, b; +{ + + return (a > b ? a : b); +} + +/* + * Display some text on somebody's window, processing some control + * characters while we are at it. + */ +void +display(win, text, size) + xwin_t *win; + char *text; + int size; +{ + int i; + char cch; + + for (i = 0; i < size; i++) { + if (*text == '\n' || *text == '\r') { + waddch(win->x_win, '\n'); + getyx(win->x_win, win->x_line, win->x_col); + text++; + continue; + } + if (*text == 004 && win == &my_win) { + /* control-D clears the screen */ + werase(my_win.x_win); + getyx(my_win.x_win, my_win.x_line, my_win.x_col); + wrefresh(my_win.x_win); + werase(his_win.x_win); + getyx(his_win.x_win, his_win.x_line, his_win.x_col); + wrefresh(his_win.x_win); + text++; + continue; + } + + /* erase character */ + if ( *text == win->cerase + || *text == 010 /* BS */ + || *text == 0177 /* DEL */ + ) { + wmove(win->x_win, win->x_line, max(--win->x_col, 0)); + getyx(win->x_win, win->x_line, win->x_col); + waddch(win->x_win, ' '); + wmove(win->x_win, win->x_line, win->x_col); + getyx(win->x_win, win->x_line, win->x_col); + text++; + continue; + } + /* + * On word erase search backwards until we find + * the beginning of a word or the beginning of + * the line. + */ + if ( *text == win->werase + || *text == 027 /* ^W */ + ) { + int endcol, xcol, ii, c; + + endcol = win->x_col; + xcol = endcol - 1; + while (xcol >= 0) { + c = readwin(win->x_win, win->x_line, xcol); + if (c != ' ') + break; + xcol--; + } + while (xcol >= 0) { + c = readwin(win->x_win, win->x_line, xcol); + if (c == ' ') + break; + xcol--; + } + wmove(win->x_win, win->x_line, xcol + 1); + for (ii = xcol + 1; ii < endcol; ii++) + waddch(win->x_win, ' '); + wmove(win->x_win, win->x_line, xcol + 1); + getyx(win->x_win, win->x_line, win->x_col); + text++; + continue; + } + /* line kill */ + if ( *text == win->kill + || *text == 025 /* ^U */ + ) { + wmove(win->x_win, win->x_line, 0); + wclrtoeol(win->x_win); + getyx(win->x_win, win->x_line, win->x_col); + text++; + continue; + } + if (*text == '\f') { + if (win == &my_win) + wrefresh(curscr); + text++; + continue; + } + if (*text == '\7') { + write(STDOUT_FILENO, text, 1); + text++; + continue; + } + if (!isprint((unsigned char)*text) && *text != '\t') { + waddch(win->x_win, '^'); + getyx(win->x_win, win->x_line, win->x_col); + cch = (*text & 63) + 64; + waddch(win->x_win, cch); + } else + waddch(win->x_win, (unsigned char)*text); + getyx(win->x_win, win->x_line, win->x_col); + text++; + } + wrefresh(win->x_win); +} + +/* + * Read the character at the indicated position in win + */ +int +readwin(win, line, col) + WINDOW *win; + int line; + int col; +{ + int oldline, oldcol; + int c; + + getyx(win, oldline, oldcol); + wmove(win, line, col); + c = winch(win); + wmove(win, oldline, oldcol); + return (c); +} |