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/* $OpenBSD: lib_overlay.c,v 1.2 2001/01/22 18:01:42 millert Exp $ */
/****************************************************************************
* Copyright (c) 1998,2000 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
****************************************************************************/
/*
** lib_overlay.c
**
** The routines overlay(), copywin(), and overwrite().
**
*/
#include <curses.priv.h>
MODULE_ID("$From: lib_overlay.c,v 1.14 2000/12/10 02:43:27 tom Exp $")
static int
overlap(const WINDOW *const s, WINDOW *const d, int const flag)
{
int sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol;
T(("overlap : sby %d, sbx %d, smy %d, smx %d, dby %d, dbx %d, dmy %d, dmx %d",
s->_begy, s->_begx, s->_maxy, s->_maxx,
d->_begy, d->_begx, d->_maxy, d->_maxx));
if (!s || !d)
returnCode(ERR);
sminrow = max(s->_begy, d->_begy) - s->_begy;
smincol = max(s->_begx, d->_begx) - s->_begx;
dminrow = max(s->_begy, d->_begy) - d->_begy;
dmincol = max(s->_begx, d->_begx) - d->_begx;
dmaxrow = min(s->_maxy + s->_begy, d->_maxy + d->_begy) - d->_begy;
dmaxcol = min(s->_maxx + s->_begx, d->_maxx + d->_begx) - d->_begx;
return (copywin(s, d,
sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol,
flag));
}
/*
**
** overlay(win1, win2)
**
**
** overlay() writes the overlapping area of win1 behind win2
** on win2 non-destructively.
**
**/
NCURSES_EXPORT(int)
overlay(const WINDOW *win1, WINDOW *win2)
{
T((T_CALLED("overlay(%p,%p)"), win1, win2));
returnCode(overlap(win1, win2, TRUE));
}
/*
**
** overwrite(win1, win2)
**
**
** overwrite() writes the overlapping area of win1 behind win2
** on win2 destructively.
**
**/
NCURSES_EXPORT(int)
overwrite(const WINDOW *win1, WINDOW *win2)
{
T((T_CALLED("overwrite(%p,%p)"), win1, win2));
returnCode(overlap(win1, win2, FALSE));
}
NCURSES_EXPORT(int)
copywin
(const WINDOW *src, WINDOW *dst,
int sminrow, int smincol,
int dminrow, int dmincol, int dmaxrow, int dmaxcol,
int over)
{
int sx, sy, dx, dy;
bool touched;
chtype bk = AttrOf(dst->_bkgd);
chtype mask = ~(chtype) ((bk & A_COLOR) ? A_COLOR : 0);
T((T_CALLED("copywin(%p, %p, %d, %d, %d, %d, %d, %d, %d)"),
src, dst, sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol, over));
if (!src || !dst)
returnCode(ERR);
/* make sure rectangle exists in source */
if ((sminrow + dmaxrow - dminrow) > (src->_maxy + 1) ||
(smincol + dmaxcol - dmincol) > (src->_maxx + 1)) {
returnCode(ERR);
}
T(("rectangle exists in source"));
/* make sure rectangle fits in destination */
if (dmaxrow > dst->_maxy || dmaxcol > dst->_maxx) {
returnCode(ERR);
}
T(("rectangle fits in destination"));
for (dy = dminrow, sy = sminrow; dy <= dmaxrow; sy++, dy++) {
touched = FALSE;
for (dx = dmincol, sx = smincol; dx <= dmaxcol; sx++, dx++) {
if (over) {
if ((TextOf(src->_line[sy].text[sx]) != ' ') &&
(dst->_line[dy].text[dx] != src->_line[sy].text[sx])) {
dst->_line[dy].text[dx] =
(src->_line[sy].text[sx] & mask) | bk;
touched = TRUE;
}
} else {
if (dst->_line[dy].text[dx] != src->_line[sy].text[sx]) {
dst->_line[dy].text[dx] = src->_line[sy].text[sx];
touched = TRUE;
}
}
}
if (touched) {
touchline(dst, 0, getmaxy(dst));
}
}
T(("finished copywin"));
returnCode(OK);
}
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