NetBSD/lib/libcurses/insdelln.c

182 lines
5.3 KiB
C

/* $NetBSD: insdelln.c,v 1.23 2022/10/19 06:09:27 blymn Exp $ */
/*
* 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.
*
* 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 1.23 2022/10/19 06:09:27 blymn Exp $");
#endif /* not lint */
/*
* 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 <stdlib.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 nlines)
{
return winsdelln(stdscr, nlines);
}
#endif
/*
* winsdelln --
* Insert or delete lines on the window, leaving (cury, curx) unchanged.
*/
int
winsdelln(WINDOW *win, int nlines)
{
int y, i, last;
__LINE *temp;
#ifdef HAVE_WCHAR
__LDATA *lp;
#endif /* HAVE_WCHAR */
attr_t attr;
__CTRACE(__CTRACE_LINE,
"winsdelln: (%p) cury=%d lines=%d\n", win, win->cury, nlines);
if (!nlines)
return OK;
if (__using_color && win != curscr)
attr = win->battr & __COLOR;
else
attr = 0;
if (nlines > 0) {
/* Insert lines */
if (win->cury < win->scr_t || win->cury > win->scr_b) {
/* Outside scrolling region */
if (nlines > win->maxy - win->cury)
nlines = win->maxy - win->cury;
last = win->maxy - 1;
} else {
/* Inside scrolling region */
if (nlines > win->scr_b + 1 - win->cury)
nlines = win->scr_b + 1 - win->cury;
last = win->scr_b;
}
for (y = last - nlines; y >= win->cury; --y) {
win->alines[y]->flags &= ~__ISPASTEOL;
win->alines[y + nlines]->flags &= ~__ISPASTEOL;
if (win->orig == NULL) {
temp = win->alines[y + nlines];
win->alines[y + nlines] = win->alines[y];
win->alines[y] = temp;
} else {
(void)memcpy(win->alines[y + nlines]->line,
win->alines[y]->line,
(size_t)win->maxx * __LDATASIZE);
}
}
for (y = win->cury - 1 + nlines; y >= win->cury; --y)
for (i = 0; i < win->maxx; i++) {
win->alines[y]->line[i].ch = win->bch;
win->alines[y]->line[i].attr = attr;
win->alines[y]->line[i].cflags |=
CA_BACKGROUND;
win->alines[y]->line[i].cflags &=
~CA_CONTINUATION;
#ifdef HAVE_WCHAR
lp = &win->alines[y]->line[i];
if (_cursesi_copy_nsp(win->bnsp, lp) == ERR)
return ERR;
lp->wcols = 1;
#endif /* HAVE_WCHAR */
}
for (y = last; y >= win->cury; --y)
__touchline(win, y, 0, (int)win->maxx - 1);
} else {
/* Delete nlines */
nlines = 0 - nlines;
if (win->cury < win->scr_t || win->cury > win->scr_b) {
/* Outside scrolling region */
if (nlines > win->maxy - win->cury)
nlines = win->maxy - win->cury;
last = win->maxy;
} else {
/* Inside scrolling region */
if (nlines > win->scr_b + 1 - win->cury)
nlines = win->scr_b + 1 - win->cury;
last = win->scr_b + 1;
}
for (y = win->cury; y < last - nlines; y++) {
win->alines[y]->flags &= ~__ISPASTEOL;
win->alines[y + nlines]->flags &= ~__ISPASTEOL;
if (win->orig == NULL) {
temp = win->alines[y];
win->alines[y] = win->alines[y + nlines];
win->alines[y + nlines] = temp;
} else {
(void)memcpy(win->alines[y]->line,
win->alines[y + nlines]->line,
(size_t)win->maxx * __LDATASIZE);
}
}
for (y = last - nlines; y < last; y++)
for (i = 0; i < win->maxx; i++) {
win->alines[y]->line[i].ch = win->bch;
win->alines[y]->line[i].attr = attr;
win->alines[y]->line[i].cflags |=
CA_BACKGROUND;
win->alines[y]->line[i].cflags &=
~CA_CONTINUATION;
#ifdef HAVE_WCHAR
lp = &win->alines[y]->line[i];
lp->wcols = 1;
if (_cursesi_copy_nsp(win->bnsp, lp) == ERR)
return ERR;
#endif /* HAVE_WCHAR */
}
for (y = win->cury; y < last; y++)
__touchline(win, y, 0, (int)win->maxx - 1);
}
if (win->orig != NULL)
__id_subwins(win->orig);
__sync(win);
return OK;
}