#include <curses.priv.h>
MODULE_ID("$Id: lib_overlay.c,v 1.21 2002/09/21 23:03:32 tom Exp $")
static int
overlap(const WINDOW *const s, WINDOW *const d, int const flag)
{
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)"), s, d, flag));
if (s == 0 || d == 0) {
returnCode(ERR);
} else {
T(("src : begy %d, begx %d, maxy %d, maxx %d",
s->_begy, s->_begx, s->_maxy, s->_maxx));
T(("dst : begy %d, begx %d, maxy %d, maxx %d",
d->_begy, d->_begx, d->_maxy, d->_maxx));
sx1 = s->_begx;
sy1 = s->_begy;
sx2 = sx1 + s->_maxx;
sy2 = sy1 + s->_maxy;
dx1 = d->_begx;
dy1 = d->_begy;
dx2 = dx1 + d->_maxx;
dy2 = dy1 + d->_maxy;
if (dx2 < sx1 || dx1 > sx2 || dy2 < sy1 || dy1 > sy2) {
returnCode(ERR);
} else {
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;
returnCode(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, dminrow, (dmaxrow - dminrow + 1));
}
}
T(("finished copywin"));
returnCode(OK);
}