insdelln.c revision 1.2 
1/*	$NetBSD: insdelln.c,v 1.2 2000/04/11 13:57:09 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 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39/*
40 * Based on deleteln.c and insertln.c -
41 * Copyright (c) 1981, 1993, 1994
42 *	The Regents of the University of California.  All rights reserved.
43 */
44
45#include <string.h>
46
47#include "curses.h"
48#include "curses_private.h"
49
50/*
51 * winsdelln --
52 *	Insert or delete lines on the window, leaving (cury, curx) unchanged.
53 */
54int
55winsdelln(win, lines)
56	WINDOW *win;
57	int	lines;
58{
59	int     y, i;
60	__LINE *temp;
61
62#ifdef DEBUG
63	__CTRACE("winsdelln: (%0.2o) cury=%d lines=%d\n", win, win->cury,
64	    lines);
65#endif
66
67	if (!lines)
68		return(OK);
69
70	if (lines > 0) {
71		/* Insert lines */
72		if (lines > win->maxy - win->cury)
73			lines = win->maxy - win->cury;
74		for (y = win->maxy - lines - 1 ; y >= win->cury; --y) {
75			win->lines[y]->flags &= ~__ISPASTEOL;
76			win->lines[y + lines]->flags &= ~__ISPASTEOL;
77			if (win->orig == NULL) {
78				temp = win->lines[y + lines];
79				win->lines[y + lines] = win->lines[y];
80				win->lines[y] = temp;
81			} else {
82				(void) memcpy(win->lines[y + lines]->line,
83				    win->lines[y]->line,
84				    (size_t) win->maxx * __LDATASIZE * lines);
85				temp = win->lines[y];
86			}
87		}
88		for (y = win->cury - 1 + lines; y >= win->cury; --y)
89			for (i = 0; i < win->maxx; i++) {
90				win->lines[y]->line[i].ch = ' ';
91				win->lines[y]->line[i].attr = 0;
92			}
93		for (y = win->maxy - 1; y >= win->cury; --y)
94			__touchline(win, y, 0, (int) win->maxx - 1, 0);
95	} else {
96		/* Delete lines */
97		lines = 0 - lines;
98		if (lines > win->maxy - win->cury)
99			lines = win->maxy - win->cury;
100		for (y = win->cury; y < win->maxy - lines; y++) {
101			win->lines[y]->flags &= ~__ISPASTEOL;
102			win->lines[y + lines]->flags &= ~__ISPASTEOL;
103			if (win->orig == NULL) {
104				temp = win->lines[y];
105				win->lines[y] = win->lines[y + lines];
106				win->lines[y + lines] = temp;
107			} else {
108				(void) memcpy(win->lines[y]->line,
109				    win->lines[y + lines]->line,
110				    (size_t) win->maxx * __LDATASIZE * lines);
111				temp = win->lines[y + lines];
112			}
113		}
114		for (y = win->maxy - lines; y < win->maxy; y++)
115			for (i = 0; i < win->maxx; i++) {
116				win->lines[y]->line[i].ch = ' ';
117				win->lines[y]->line[i].attr = 0;
118			}
119		for (y = win->cury; y < win->maxy; y++)
120			__touchline(win, y, 0, (int) win->maxx - 1, 0);
121	}
122	if (win->orig != NULL)
123		__id_subwins(win);
124	return (OK);
125}
126