1/* $NetBSD: clrtoeol.c,v 1.35 2022/05/12 22:25:38 blymn Exp $ */ 2 3/* 4 * Copyright (c) 1981, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33#ifndef lint 34#if 0 35static char sccsid[] = "@(#)clrtoeol.c 8.2 (Berkeley) 5/4/94"; 36#else 37__RCSID("$NetBSD: clrtoeol.c,v 1.35 2022/05/12 22:25:38 blymn Exp $"); 38#endif 39#endif /* not lint */ 40 41#include <stdlib.h> 42#include "curses.h" 43#include "curses_private.h" 44 45#ifndef _CURSES_USE_MACROS 46 47/* 48 * clrtoeol -- 49 * Clear up to the end of line. 50 */ 51int 52clrtoeol(void) 53{ 54 return wclrtoeol(stdscr); 55} 56 57#endif 58 59/* 60 * wclrtoeol -- 61 * Clear up to the end of line. 62 */ 63int 64wclrtoeol(WINDOW *win) 65{ 66 int minx, x, y; 67 __LDATA *end, *maxx, *sp; 68 wchar_t bch; 69 attr_t battr; 70 71 bch = win->bch; 72 if (win != curscr) 73 battr = win->battr & __ATTRIBUTES; 74 else 75 battr = 0; 76 77 y = win->cury; 78 x = win->curx; 79 if (win->alines[y]->flags & __ISPASTEOL) { 80 if (y < win->maxy - 1) { 81 win->alines[y]->flags &= ~__ISPASTEOL; 82 y++; 83 x = 0; 84 win->cury = y; 85 win->curx = x; 86 } else 87 return OK; 88 } 89 end = &win->alines[y]->line[win->maxx]; 90 minx = -1; 91 maxx = &win->alines[y]->line[x]; 92 93 for (sp = maxx; sp < end; sp++) { 94 /* 95 * It looks like ncurses makes the rest of line foreground 96 * when it is cleared - this doesn't seem right but it 97 * makes applicatins look right. 98 */ 99 sp->cflags &= ~CA_BACKGROUND; 100 if (!(__NEED_ERASE(sp, bch, battr))) 101 continue; 102 103 maxx = sp; 104 if (minx == -1) 105 minx = (int)(sp - win->alines[y]->line); 106 107 sp->ch = bch; 108 sp->attr = battr | (sp->attr & __ALTCHARSET); 109#ifdef HAVE_WCHAR 110 if (_cursesi_copy_nsp(win->bnsp, sp) == ERR) 111 return ERR; 112 sp->wcols = 1; 113#endif 114 } 115 116 __CTRACE(__CTRACE_ERASE, "CLRTOEOL: y = %d, minx = %d, maxx = %d, " 117 "firstch = %d, lastch = %d\n", 118 y, minx, (int)(maxx - win->alines[y]->line), 119 *win->alines[y]->firstchp, *win->alines[y]->lastchp); 120 /* Update firstch and lastch for the line. */ 121 __touchline(win, y, x, (int)win->maxx - 1); 122 __sync(win); 123 return OK; 124} 125