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/****************************************************************************
* Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. *
* *
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* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
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* 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. *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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****************************************************************************/
/****************************************************************************
* 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("$Id: lib_overlay.c,v 1.27 2008/06/07 23:30:34 tom Exp $")
static int
overlap(const WINDOW *const src, WINDOW *const dst, int const flag)
{
int rc = ERR;
int sx1, sy1, sx2, sy2;
int dx1, dy1, dx2, dy2;
int sminrow, smincol;
int dminrow, dmincol;
int dmaxrow, dmaxcol;
T((T_CALLED("overlap(%p,%p,%d)"), src, dst, flag));
if (src != 0 && dst != 0) {
_nc_lock_global(curses);
T(("src : begy %ld, begx %ld, maxy %ld, maxx %ld",
(long) src->_begy,
(long) src->_begx,
(long) src->_maxy,
(long) src->_maxx));
T(("dst : begy %ld, begx %ld, maxy %ld, maxx %ld",
(long) dst->_begy,
(long) dst->_begx,
(long) dst->_maxy,
(long) dst->_maxx));
sx1 = src->_begx;
sy1 = src->_begy;
sx2 = sx1 + src->_maxx;
sy2 = sy1 + src->_maxy;
dx1 = dst->_begx;
dy1 = dst->_begy;
dx2 = dx1 + dst->_maxx;
dy2 = dy1 + dst->_maxy;
if (dx2 >= sx1 && dx1 <= sx2 && dy2 >= sy1 && dy1 <= sy2) {
sminrow = max(sy1, dy1) - sy1;
smincol = max(sx1, dx1) - sx1;
dminrow = max(sy1, dy1) - dy1;
dmincol = max(sx1, dx1) - dx1;
dmaxrow = min(sy2, dy2) - dy1;
dmaxcol = min(sx2, dx2) - dx1;
rc = copywin(src, dst,
sminrow, smincol,
dminrow, dmincol,
dmaxrow, dmaxcol,
flag);
}
_nc_unlock_global(curses);
}
returnCode(rc);
}
/*
**
** 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 rc = ERR;
int sx, sy, dx, dy;
bool touched;
attr_t bk;
attr_t mask;
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) {
_nc_lock_global(curses);
bk = AttrOf(dst->_nc_bkgd);
mask = ~(attr_t) ((bk & A_COLOR) ? A_COLOR : 0);
/* make sure rectangle exists in source */
if ((sminrow + dmaxrow - dminrow) <= (src->_maxy + 1) &&
(smincol + dmaxcol - dmincol) <= (src->_maxx + 1)) {
T(("rectangle exists in source"));
/* make sure rectangle fits in destination */
if (dmaxrow <= dst->_maxy && dmaxcol <= dst->_maxx) {
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 ((CharOf(src->_line[sy].text[sx]) != L(' ')) &&
(!CharEq(dst->_line[dy].text[dx],
src->_line[sy].text[sx]))) {
dst->_line[dy].text[dx] =
src->_line[sy].text[sx];
SetAttr(dst->_line[dy].text[dx],
((AttrOf(src->_line[sy].text[sx]) &
mask) | bk));
touched = TRUE;
}
} else {
if (!CharEq(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, dminrow, (dmaxrow - dminrow + 1));
}
}
T(("finished copywin"));
rc = OK;
}
}
_nc_unlock_global(curses);
}
returnCode(rc);
}