1 /* $NetBSD: insdelln.c,v 1.24 2024/12/23 02:58:03 blymn Exp $ */
2
3 /*
4 * Copyright (c) 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Julian Coleman.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 __RCSID("$NetBSD: insdelln.c,v 1.24 2024/12/23 02:58:03 blymn Exp $");
35 #endif /* not lint */
36
37 /*
38 * Based on deleteln.c and insertln.c -
39 * Copyright (c) 1981, 1993, 1994
40 * The Regents of the University of California. All rights reserved.
41 */
42
43 #include <string.h>
44 #include <stdlib.h>
45
46 #include "curses.h"
47 #include "curses_private.h"
48
49 #ifndef _CURSES_USE_MACROS
50
51 /*
52 * insdelln --
53 * Insert or delete lines on stdscr, leaving (cury, curx) unchanged.
54 */
55 int
insdelln(int nlines)56 insdelln(int nlines)
57 {
58
59 return winsdelln(stdscr, nlines);
60 }
61
62 #endif
63
64 /*
65 * winsdelln --
66 * Insert or delete lines on the window, leaving (cury, curx) unchanged.
67 */
68 int
winsdelln(WINDOW * win,int nlines)69 winsdelln(WINDOW *win, int nlines)
70 {
71 int y, i, last;
72 __LINE *temp;
73 #ifdef HAVE_WCHAR
74 __LDATA *lp;
75 #endif /* HAVE_WCHAR */
76 attr_t attr;
77
78 __CTRACE(__CTRACE_LINE,
79 "winsdelln: (%p) cury=%d lines=%d\n", win, win->cury, nlines);
80
81 if (__predict_false(win == NULL))
82 return ERR;
83
84 if (!nlines)
85 return OK;
86
87 if (__using_color && win != curscr)
88 attr = win->battr & __COLOR;
89 else
90 attr = 0;
91
92 if (nlines > 0) {
93 /* Insert lines */
94 if (win->cury < win->scr_t || win->cury > win->scr_b) {
95 /* Outside scrolling region */
96 if (nlines > win->maxy - win->cury)
97 nlines = win->maxy - win->cury;
98 last = win->maxy - 1;
99 } else {
100 /* Inside scrolling region */
101 if (nlines > win->scr_b + 1 - win->cury)
102 nlines = win->scr_b + 1 - win->cury;
103 last = win->scr_b;
104 }
105 for (y = last - nlines; y >= win->cury; --y) {
106 win->alines[y]->flags &= ~__ISPASTEOL;
107 win->alines[y + nlines]->flags &= ~__ISPASTEOL;
108 if (win->orig == NULL) {
109 temp = win->alines[y + nlines];
110 win->alines[y + nlines] = win->alines[y];
111 win->alines[y] = temp;
112 } else {
113 (void)memcpy(win->alines[y + nlines]->line,
114 win->alines[y]->line,
115 (size_t)win->maxx * __LDATASIZE);
116 }
117 }
118 for (y = win->cury - 1 + nlines; y >= win->cury; --y)
119 for (i = 0; i < win->maxx; i++) {
120 win->alines[y]->line[i].ch = win->bch;
121 win->alines[y]->line[i].attr = attr;
122 win->alines[y]->line[i].cflags |=
123 CA_BACKGROUND;
124 win->alines[y]->line[i].cflags &=
125 ~CA_CONTINUATION;
126 #ifdef HAVE_WCHAR
127 lp = &win->alines[y]->line[i];
128 if (_cursesi_copy_nsp(win->bnsp, lp) == ERR)
129 return ERR;
130 lp->wcols = 1;
131 #endif /* HAVE_WCHAR */
132 }
133 for (y = last; y >= win->cury; --y)
134 __touchline(win, y, 0, (int)win->maxx - 1);
135 } else {
136 /* Delete nlines */
137 nlines = 0 - nlines;
138 if (win->cury < win->scr_t || win->cury > win->scr_b) {
139 /* Outside scrolling region */
140 if (nlines > win->maxy - win->cury)
141 nlines = win->maxy - win->cury;
142 last = win->maxy;
143 } else {
144 /* Inside scrolling region */
145 if (nlines > win->scr_b + 1 - win->cury)
146 nlines = win->scr_b + 1 - win->cury;
147 last = win->scr_b + 1;
148 }
149 for (y = win->cury; y < last - nlines; y++) {
150 win->alines[y]->flags &= ~__ISPASTEOL;
151 win->alines[y + nlines]->flags &= ~__ISPASTEOL;
152 if (win->orig == NULL) {
153 temp = win->alines[y];
154 win->alines[y] = win->alines[y + nlines];
155 win->alines[y + nlines] = temp;
156 } else {
157 (void)memcpy(win->alines[y]->line,
158 win->alines[y + nlines]->line,
159 (size_t)win->maxx * __LDATASIZE);
160 }
161 }
162 for (y = last - nlines; y < last; y++)
163 for (i = 0; i < win->maxx; i++) {
164 win->alines[y]->line[i].ch = win->bch;
165 win->alines[y]->line[i].attr = attr;
166 win->alines[y]->line[i].cflags |=
167 CA_BACKGROUND;
168 win->alines[y]->line[i].cflags &=
169 ~CA_CONTINUATION;
170 #ifdef HAVE_WCHAR
171 lp = &win->alines[y]->line[i];
172 lp->wcols = 1;
173 if (_cursesi_copy_nsp(win->bnsp, lp) == ERR)
174 return ERR;
175 #endif /* HAVE_WCHAR */
176 }
177 for (y = win->cury; y < last; y++)
178 __touchline(win, y, 0, (int)win->maxx - 1);
179 }
180 if (win->orig != NULL)
181 __id_subwins(win->orig);
182 __sync(win);
183 return OK;
184 }
185