minix/lib/libcurses/mvwin.c

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/* $NetBSD: mvwin.c,v 1.18 2013/10/18 19:53:59 christos Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* 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. Neither the name of the University 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 REGENTS 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 REGENTS 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
#if 0
static char sccsid[] = "@(#)mvwin.c 8.2 (Berkeley) 5/4/94";
#else
__RCSID("$NetBSD: mvwin.c,v 1.18 2013/10/18 19:53:59 christos Exp $");
#endif
#endif /* not lint */
#include "curses.h"
#include "curses_private.h"
/*
* mvderwin --
* Move a derived window. This does not change the physical screen
* coordinates of the subwin, rather maps the characters in the subwin
* sized part of the parent window starting at dy, dx into the subwin.
*
*/
int
mvderwin(WINDOW *win, int dy, int dx)
{
WINDOW *parent;
int x, i;
__LINE *lp, *olp;
#ifdef HAVE_WCHAR
__LDATA *cp;
int j;
nschar_t *np;
#endif /* HAVE_WCHAR */
if (win == NULL)
return ERR;
parent = win->orig;
if (parent == NULL)
return ERR;
if (((win->maxx + dx) > parent->maxx) ||
((win->maxy + dy) > parent->maxy))
return ERR;
x = parent->begx + dx;
win->ch_off = x;
/* Point the line pointers to line space */
for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) {
lp->flags = __ISDIRTY;
win->alines[i] = lp;
olp = parent->alines[i + dy];
#ifdef DEBUG
lp->sentinel = SENTINEL_VALUE;
#endif
lp->line = &olp->line[win->ch_off];
lp->firstchp = &olp->firstch;
lp->lastchp = &olp->lastch;
#ifndef HAVE_WCHAR
lp->hash = __hash((char *)(void *)lp->line,
(size_t) (win->maxx * __LDATASIZE));
#else
for (cp = lp->line, j = 0; j < win->maxx; j++, cp++) {
lp->hash = __hash_more(&cp->ch, sizeof(wchar_t),
lp->hash);
lp->hash = __hash_more(&cp->attr, sizeof(wchar_t),
lp->hash);
if (cp->nsp) {
np = cp->nsp;
while (np) {
lp->hash = __hash_more(&np->ch,
sizeof(wchar_t), lp->hash);
np = np->next;
}
}
}
#endif /* HAVE_WCHAR */
}
return OK;
}
/*
* mvwin --
* Relocate the starting position of a window.
*/
int
mvwin(WINDOW *win, int by, int bx)
{
WINDOW *orig;
int dy, dx;
if (by < 0 || by + win->maxy > LINES || bx < 0 || bx + win->maxx > COLS)
return (ERR);
dy = by - win->begy;
dx = bx - win->begx;
orig = win->orig;
if (orig == NULL) {
orig = win;
do {
win->begy += dy;
win->begx += dx;
__swflags(win);
win = win->nextp;
} while (win != orig);
} else {
if (by < orig->begy || win->maxy + dy > orig->maxy)
return (ERR);
if (bx < orig->begx || win->maxx + dx > orig->maxx)
return (ERR);
win->begy = by;
win->begx = bx;
__swflags(win);
__set_subwin(orig, win);
}
__touchwin(win);
return (OK);
}