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
35 static 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 */
51 int
clrtoeol(void)52 clrtoeol(void)
53 {
54 return wclrtoeol(stdscr);
55 }
56
57 #endif
58
59 /*
60 * wclrtoeol --
61 * Clear up to the end of line.
62 */
63 int
wclrtoeol(WINDOW * win)64 wclrtoeol(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