overlay.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* Copyright 2001 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*LINTLIBRARY*/
#ifndef lint
static char
sccsid[] = "@(#)overlay.c 1.9 89/07/13 SMI"; /* from UCB 5.2 86/02/12 */
#endif /* not lint */
#include "curses.ext"
#include <ctype.h>
#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))
/*
* This routine writes win1 on win2 non-destructively.
*/
int
overlay(WINDOW *win1, WINDOW *win2)
{
char *sp, *end;
int x, y, endy, endx, starty, startx;
int y1, y2;
#ifdef DEBUG
fprintf(outf, "OVERLAY(%0.2o, %0.2o);\n", win1, win2);
#endif
starty = max(win1->_begy, win2->_begy);
startx = max(win1->_begx, win2->_begx);
endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy);
endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx);
#ifdef DEBUG
fprintf(outf, "OVERLAY:from (%d,%d) to (%d,%d)\n",
starty, startx, endy, endx);
#endif
if (starty >= endy || startx >= endx)
return (OK);
y1 = starty - win1->_begy;
y2 = starty - win2->_begy;
for (y = starty; y < endy; y++, y1++, y2++) {
end = &win1->_y[y1][endx - win1->_begx];
x = startx - win2->_begx;
for (sp = &win1->_y[y1][startx - win1->_begx]; sp < end; sp++) {
if (!isspace(*sp))
(void) mvwaddch(win2, y2, x, *sp);
x++;
}
}
return (OK);
}