11590Srgrimes/* 21590Srgrimes * Copyright (c) 1983, 1993 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * Redistribution and use in source and binary forms, with or without 61590Srgrimes * modification, are permitted provided that the following conditions 71590Srgrimes * are met: 81590Srgrimes * 1. Redistributions of source code must retain the above copyright 91590Srgrimes * notice, this list of conditions and the following disclaimer. 101590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111590Srgrimes * notice, this list of conditions and the following disclaimer in the 121590Srgrimes * documentation and/or other materials provided with the distribution. 131590Srgrimes * 4. Neither the name of the University nor the names of its contributors 141590Srgrimes * may be used to endorse or promote products derived from this software 151590Srgrimes * without specific prior written permission. 161590Srgrimes * 171590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271590Srgrimes * SUCH DAMAGE. 281590Srgrimes */ 291590Srgrimes 3087710Smarkm#include <sys/cdefs.h> 3187710Smarkm 3287710Smarkm__FBSDID("$FreeBSD: releng/10.2/usr.bin/talk/display.c 273496 2014-10-23 00:39:19Z ngie $"); 3387710Smarkm 341590Srgrimes#ifndef lint 3587710Smarkmstatic const char sccsid[] = "@(#)display.c 8.1 (Berkeley) 6/6/93"; 3632503Scharnier#endif 371590Srgrimes 381590Srgrimes/* 391590Srgrimes * The window 'manager', initializes curses and handles the actual 401590Srgrimes * displaying of text 411590Srgrimes */ 422929Sache#include <ctype.h> 43200418Sdelphij#include <unistd.h> 44273496Sngie#include <wctype.h> 45273496Sngie#define _XOPEN_SOURCE_EXTENDED 46273496Sngie#include <curses.h> 471590Srgrimes 4887710Smarkm#include "talk.h" 4987710Smarkm 50273496Sngievoid display(xwin_t *, wchar_t *); 51273496Sngie 521590Srgrimesxwin_t my_win; 531590Srgrimesxwin_t his_win; 541590SrgrimesWINDOW *line_win; 551590Srgrimes 561590Srgrimesint curses_initialized = 0; 571590Srgrimes 581590Srgrimes/* 591590Srgrimes * max HAS to be a function, it is called with 60108533Sschweikh * an argument of the form --foo at least once. 611590Srgrimes */ 6214443Sjoergint 63178642Sdelphijmax(int a, int b) 641590Srgrimes{ 651590Srgrimes 661590Srgrimes return (a > b ? a : b); 671590Srgrimes} 681590Srgrimes 69273496Sngiestatic cchar_t * 70273496Sngiemakecchar(wchar_t in) 71273496Sngie{ 72273496Sngie static cchar_t cc; 73273496Sngie wchar_t wc[2]; 74273496Sngie 75273496Sngie wc[0] = in; 76273496Sngie wc[1] = L'\0'; 77273496Sngie 78273496Sngie if (setcchar(&cc, wc, A_NORMAL, 0, NULL) != OK) 79273496Sngie p_error("settchar(3) failure"); 80273496Sngie 81273496Sngie return (&cc); 82273496Sngie} 83273496Sngie 841590Srgrimes/* 85273496Sngie * Display a symbol on somebody's window, processing some control 861590Srgrimes * characters while we are at it. 871590Srgrimes */ 8814443Sjoergvoid 89273496Sngiedisplay(xwin_t *win, wchar_t *wc) 901590Srgrimes{ 911590Srgrimes 92273496Sngie /* 93273496Sngie * Alas, can't use variables in C switch statement. 94273496Sngie * Workaround these 3 cases with goto. 95273496Sngie */ 96273496Sngie if (*wc == win->kill) 97273496Sngie goto kill; 98273496Sngie else if (*wc == win->cerase) 99273496Sngie goto cerase; 100273496Sngie else if (*wc == win->werase) 101273496Sngie goto werase; 102273496Sngie 103273496Sngie switch (*wc) { 104273496Sngie case L'\n': 105273496Sngie case L'\r': 106273496Sngie wadd_wch(win->x_win, makecchar(L'\n')); 107273496Sngie getyx(win->x_win, win->x_line, win->x_col); 108273496Sngie wrefresh(win->x_win); 109273496Sngie return; 110273496Sngie 111273496Sngie case 004: 112273496Sngie if (win == &my_win) { 113273496Sngie /* Ctrl-D clears the screen. */ 11499965Sluigi werase(my_win.x_win); 11599965Sluigi getyx(my_win.x_win, my_win.x_line, my_win.x_col); 11699965Sluigi wrefresh(my_win.x_win); 11799965Sluigi werase(his_win.x_win); 11899965Sluigi getyx(his_win.x_win, his_win.x_line, his_win.x_col); 11999965Sluigi wrefresh(his_win.x_win); 12099965Sluigi } 121273496Sngie return; 122117238Sluigi 123273496Sngie /* Erase character. */ 124273496Sngie case 010: /* BS */ 125273496Sngie case 0177: /* DEL */ 126273496Sngiecerase: 127273496Sngie wmove(win->x_win, win->x_line, max(--win->x_col, 0)); 128273496Sngie getyx(win->x_win, win->x_line, win->x_col); 129273496Sngie waddch(win->x_win, ' '); 130273496Sngie wmove(win->x_win, win->x_line, win->x_col); 131273496Sngie getyx(win->x_win, win->x_line, win->x_col); 132273496Sngie wrefresh(win->x_win); 133273496Sngie return; 134273496Sngie 135273496Sngie case 027: /* ^W */ 136273496Sngiewerase: 137273496Sngie { 1381590Srgrimes /* 1391590Srgrimes * On word erase search backwards until we find 1401590Srgrimes * the beginning of a word or the beginning of 1411590Srgrimes * the line. 1421590Srgrimes */ 143273496Sngie int endcol, xcol, c; 1441590Srgrimes 145273496Sngie endcol = win->x_col; 146273496Sngie xcol = endcol - 1; 147273496Sngie while (xcol >= 0) { 148273496Sngie c = readwin(win->x_win, win->x_line, xcol); 149273496Sngie if (c != ' ') 150273496Sngie break; 151273496Sngie xcol--; 1521590Srgrimes } 153273496Sngie while (xcol >= 0) { 154273496Sngie c = readwin(win->x_win, win->x_line, xcol); 155273496Sngie if (c == ' ') 156273496Sngie break; 157273496Sngie xcol--; 1581590Srgrimes } 159273496Sngie wmove(win->x_win, win->x_line, xcol + 1); 160273496Sngie for (int i = xcol + 1; i < endcol; i++) 161273496Sngie waddch(win->x_win, ' '); 162273496Sngie wmove(win->x_win, win->x_line, xcol + 1); 1631590Srgrimes getyx(win->x_win, win->x_line, win->x_col); 164273496Sngie wrefresh(win->x_win); 165273496Sngie return; 166273496Sngie } 167273496Sngie 168273496Sngie case 025: /* ^U */ 169273496Sngiekill: 170273496Sngie wmove(win->x_win, win->x_line, 0); 171273496Sngie wclrtoeol(win->x_win); 172273496Sngie getyx(win->x_win, win->x_line, win->x_col); 173273496Sngie wrefresh(win->x_win); 174273496Sngie return; 175273496Sngie 176273496Sngie case L'\f': 177273496Sngie if (win == &my_win) 178273496Sngie wrefresh(curscr); 179273496Sngie return; 180273496Sngie 181273496Sngie case L'\7': 182273496Sngie write(STDOUT_FILENO, wc, sizeof(*wc)); 183273496Sngie return; 1841590Srgrimes } 185273496Sngie 186273496Sngie 187273496Sngie if (iswprint(*wc) || *wc == L'\t') 188273496Sngie wadd_wch(win->x_win, makecchar(*wc)); 189273496Sngie else 190273496Sngie beep(); 191273496Sngie 192273496Sngie getyx(win->x_win, win->x_line, win->x_col); 1931590Srgrimes wrefresh(win->x_win); 1941590Srgrimes} 1951590Srgrimes 1961590Srgrimes/* 1971590Srgrimes * Read the character at the indicated position in win 1981590Srgrimes */ 19914443Sjoergint 200178642Sdelphijreadwin(WINDOW *win, int line, int col) 2011590Srgrimes{ 2021590Srgrimes int oldline, oldcol; 20387710Smarkm int c; 2041590Srgrimes 2051590Srgrimes getyx(win, oldline, oldcol); 2061590Srgrimes wmove(win, line, col); 2071590Srgrimes c = winch(win); 2081590Srgrimes wmove(win, oldline, oldcol); 2091590Srgrimes return (c); 2101590Srgrimes} 211