1 /* $NetBSD: insdelln.c,v 1.16 2009/07/22 16:57:15 roy 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 1.16 2009/07/22 16:57:15 roy 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 return winsdelln(stdscr, nlines);
59 }
60
61 #endif
62
63 /*
64 * winsdelln --
65 * Insert or delete lines on the window, leaving (cury, curx) unchanged.
66 */
67 int
winsdelln(WINDOW * win,int nlines)68 winsdelln(WINDOW *win, int nlines)
69 {
70 int y, i, last;
71 __LINE *temp;
72 #ifdef HAVE_WCHAR
73 __LDATA *lp;
74 #endif /* HAVE_WCHAR */
75 attr_t attr;
76
77 #ifdef DEBUG
78 __CTRACE(__CTRACE_LINE,
79 "winsdelln: (%p) cury=%d lines=%d\n", win, win->cury, nlines);
80 #endif
81
82 if (!nlines)
83 return(OK);
84
85 if (__using_color && win != curscr)
86 attr = win->battr & __COLOR;
87 else
88 attr = 0;
89
90 if (nlines > 0) {
91 /* Insert lines */
92 if (win->cury < win->scr_t || win->cury > win->scr_b) {
93 /* Outside scrolling region */
94 if (nlines > win->maxy - win->cury)
95 nlines = win->maxy - win->cury;
96 last = win->maxy - 1;
97 } else {
98 /* Inside scrolling region */
99 if (nlines > win->scr_b + 1 - win->cury)
100 nlines = win->scr_b + 1 - win->cury;
101 last = win->scr_b;
102 }
103 for (y = last - nlines; y >= win->cury; --y) {
104 win->alines[y]->flags &= ~__ISPASTEOL;
105 win->alines[y + nlines]->flags &= ~__ISPASTEOL;
106 if (win->orig == NULL) {
107 temp = win->alines[y + nlines];
108 win->alines[y + nlines] = win->alines[y];
109 win->alines[y] = temp;
110 } else {
111 (void) memcpy(win->alines[y + nlines]->line,
112 win->alines[y]->line,
113 (size_t) win->maxx * __LDATASIZE);
114 }
115 }
116 for (y = win->cury - 1 + nlines; y >= win->cury; --y)
117 for (i = 0; i < win->maxx; i++) {
118 win->alines[y]->line[i].ch = win->bch;
119 win->alines[y]->line[i].attr = attr;
120 #ifndef HAVE_WCHAR
121 win->alines[y]->line[i].ch = win->bch;
122 #else
123 win->alines[y]->line[i].ch
124 = ( wchar_t )btowc(( int ) win->bch );
125 lp = &win->alines[y]->line[i];
126 if (_cursesi_copy_nsp(win->bnsp, lp) == ERR)
127 return ERR;
128 SET_WCOL( *lp, 1 );
129 #endif /* HAVE_WCHAR */
130 }
131 for (y = last; y >= win->cury; --y)
132 __touchline(win, y, 0, (int) win->maxx - 1);
133 } else {
134 /* Delete nlines */
135 nlines = 0 - nlines;
136 if (win->cury < win->scr_t || win->cury > win->scr_b) {
137 /* Outside scrolling region */
138 if (nlines > win->maxy - win->cury)
139 nlines = win->maxy - win->cury;
140 last = win->maxy;
141 } else {
142 /* Inside scrolling region */
143 if (nlines > win->scr_b + 1 - win->cury)
144 nlines = win->scr_b + 1 - win->cury;
145 last = win->scr_b + 1;
146 }
147 for (y = win->cury; y < last - nlines; y++) {
148 win->alines[y]->flags &= ~__ISPASTEOL;
149 win->alines[y + nlines]->flags &= ~__ISPASTEOL;
150 if (win->orig == NULL) {
151 temp = win->alines[y];
152 win->alines[y] = win->alines[y + nlines];
153 win->alines[y + nlines] = temp;
154 } else {
155 (void) memcpy(win->alines[y]->line,
156 win->alines[y + nlines]->line,
157 (size_t) win->maxx * __LDATASIZE);
158 }
159 }
160 for (y = last - nlines; y < last; y++)
161 for (i = 0; i < win->maxx; i++) {
162 win->alines[y]->line[i].ch = win->bch;
163 win->alines[y]->line[i].attr = attr;
164 #ifndef HAVE_WCHAR
165 win->alines[y]->line[i].ch = win->bch;
166 #else
167 win->alines[y]->line[i].ch
168 = (wchar_t)btowc((int) win->bch);
169 lp = &win->alines[y]->line[i];
170 SET_WCOL( *lp, 1 );
171 if (_cursesi_copy_nsp(win->bnsp, lp) == ERR)
172 return ERR;
173 #endif /* HAVE_WCHAR */
174 }
175 for (y = win->cury; y < last; y++)
176 __touchline(win, y, 0, (int) win->maxx - 1);
177 }
178 if (win->orig != NULL)
179 __id_subwins(win->orig);
180 return (OK);
181 }
182