NetBSD/lib/libcurses/insdelln.c

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/* $NetBSD: insdelln.c,v 1.8 2001/04/20 12:56:08 jdc Exp $ */
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/*
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Julian Coleman.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: insdelln.c,v 1.8 2001/04/20 12:56:08 jdc Exp $");
#endif /* not lint */
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/*
* Based on deleteln.c and insertln.c -
* Copyright (c) 1981, 1993, 1994
* The Regents of the University of California. All rights reserved.
*/
#include <string.h>
#include "curses.h"
#include "curses_private.h"
#ifndef _CURSES_USE_MACROS
/*
* insdelln --
* Insert or delete lines on stdscr, leaving (cury, curx) unchanged.
*/
int
insdelln(int lines)
{
return winsdelln(stdscr, lines);
}
#endif
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/*
* winsdelln --
* Insert or delete lines on the window, leaving (cury, curx) unchanged.
*/
int
winsdelln(WINDOW *win, int lines)
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{
int y, i, last;
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__LINE *temp;
#ifdef DEBUG
__CTRACE("winsdelln: (%0.2o) cury=%d lines=%d\n", win, win->cury,
lines);
#endif
if (!lines)
return(OK);
if (lines > 0) {
/* Insert lines */
if (win->cury < win->scr_t || win->cury > win->scr_b) {
/* Outside scrolling region */
if (lines > win->maxy - win->cury)
lines = win->maxy - win->cury;
last = win->maxy - 1;
} else {
/* Inside scrolling region */
if (lines > win->scr_b + 1 - win->cury)
lines = win->scr_b + 1 - win->cury;
last = win->scr_b;
}
for (y = last - lines; y >= win->cury; --y) {
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win->lines[y]->flags &= ~__ISPASTEOL;
win->lines[y + lines]->flags &= ~__ISPASTEOL;
if (win->orig == NULL) {
temp = win->lines[y + lines];
win->lines[y + lines] = win->lines[y];
win->lines[y] = temp;
} else {
(void) memcpy(win->lines[y + lines]->line,
win->lines[y]->line,
(size_t) win->maxx * __LDATASIZE * lines);
temp = win->lines[y];
}
}
for (y = win->cury - 1 + lines; y >= win->cury; --y)
for (i = 0; i < win->maxx; i++) {
win->lines[y]->line[i].ch = ' ';
win->lines[y]->line[i].bch = win->bch;
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win->lines[y]->line[i].attr = 0;
win->lines[y]->line[i].battr = win->battr;
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}
for (y = last; y >= win->cury; --y)
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__touchline(win, y, 0, (int) win->maxx - 1);
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} else {
/* Delete lines */
lines = 0 - lines;
if (win->cury < win->scr_t || win->cury > win->scr_b) {
/* Outside scrolling region */
if (lines > win->maxy - win->cury)
lines = win->maxy - win->cury;
last = win->maxy;
} else {
/* Inside scrolling region */
if (lines > win->scr_b + 1 - win->cury)
lines = win->scr_b + 1 - win->cury;
last = win->scr_b + 1;
}
for (y = win->cury; y < last - lines; y++) {
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win->lines[y]->flags &= ~__ISPASTEOL;
win->lines[y + lines]->flags &= ~__ISPASTEOL;
if (win->orig == NULL) {
temp = win->lines[y];
win->lines[y] = win->lines[y + lines];
win->lines[y + lines] = temp;
} else {
(void) memcpy(win->lines[y]->line,
win->lines[y + lines]->line,
(size_t) win->maxx * __LDATASIZE * lines);
temp = win->lines[y + lines];
}
}
for (y = last - lines; y < last; y++)
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for (i = 0; i < win->maxx; i++) {
win->lines[y]->line[i].ch = ' ';
win->lines[y]->line[i].bch = win->bch;
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win->lines[y]->line[i].attr = 0;
win->lines[y]->line[i].battr = win->battr;
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}
for (y = win->cury; y < last; y++)
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__touchline(win, y, 0, (int) win->maxx - 1);
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}
if (win->orig != NULL)
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__id_subwins(win->orig);
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return (OK);
}