usr/src/lib/libcurses/mvwin.c

/*
 * Copyright (c) 1981 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)mvwin.c     5.9 (Berkeley) %G%";
#endif  /* not lint */

#include <curses.h>

/*
 * mvwin --
 *      Relocate the starting position of a window.
 */
int
mvwin(win, by, bx)
        register WINDOW *win;
        register int by, bx;
{
        register WINDOW *orig;
        register int dy, dx;

        if (by + win->maxy > LINES || bx + win->maxx > COLS)
                return (ERR);
        dy = by - win->begy;
        dx = bx - win->begx;
        orig = win->orig;
        if (orig == NULL) {
                orig = win;
                do {
                        win->begy += dy;
                        win->begx += dx;
                        __swflags(win);
                        win = win->nextp;
                } while (win != orig);
        } else {
                if (by < orig->begy || win->maxy + dy > orig->maxy)
                        return (ERR);
                if (bx < orig->begx || win->maxx + dx > orig->maxx)
                        return (ERR);
                win->begy = by;
                win->begx = bx;
                __swflags(win);
                __set_subwin(orig, win);
        }
        __touchwin(win);
        return (OK);
}