#include <curses.priv.h>
MODULE_ID("$Id: lib_overlay.c,v 1.1.1.2 2002/01/03 23:53:40 jevans 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));
}
NCURSES_EXPORT(int)
overlay(const WINDOW *win1, WINDOW *win2)
{
T((T_CALLED("overlay(%p,%p)"), win1, win2));
returnCode(overlap(win1, win2, TRUE));
}
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;
attr_t bk = AttrOf(dst->_nc_bkgd);
attr_t mask = ~(attr_t) ((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);
if ((sminrow + dmaxrow - dminrow) > (src->_maxy + 1) ||
(smincol + dmaxcol - dmincol) > (src->_maxx + 1)) {
returnCode(ERR);
}
T(("rectangle exists in source"));
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 ((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, 0, getmaxy(dst));
}
}
T(("finished copywin"));
returnCode(OK);
}