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mvwin.c revision 1.13 
      1 /*	$NetBSD: mvwin.c,v 1.13 2002/01/02 10:38:28 blymn Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1981, 1993, 1994
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)mvwin.c	8.2 (Berkeley) 5/4/94";
     40 #else
     41 __RCSID("$NetBSD: mvwin.c,v 1.13 2002/01/02 10:38:28 blymn Exp $");
     42 #endif
     43 #endif				/* not lint */
     44 
     45 #include "curses.h"
     46 #include "curses_private.h"
     47 
     48 /*
     49  * mvderwin --
     50  *      Move a derived window.
     51  *
     52  */
     53 int
     54 mvderwin(WINDOW *win, int dy, int dx)
     55 {
     56 	WINDOW *parent;
     57 	int x, y;
     58 
     59 	if (win == NULL)
     60 		return ERR;
     61 
     62 	parent = win->orig;
     63 
     64 	if (parent == NULL)
     65 		return ERR;
     66 
     67 	x = parent->begx + dx;
     68 	y = parent->begy + dy;
     69 	return mvwin(win, y, x);
     70 }
     71 
     72 /*
     73  * mvwin --
     74  *	Relocate the starting position of a window.
     75  */
     76 int
     77 mvwin(WINDOW *win, int by, int bx)
     78 {
     79 	WINDOW *orig;
     80 	int     dy, dx;
     81 
     82 	if (by + win->maxy > LINES || bx + win->maxx > COLS)
     83 		return (ERR);
     84 	dy = by - win->begy;
     85 	dx = bx - win->begx;
     86 	orig = win->orig;
     87 	if (orig == NULL) {
     88 		orig = win;
     89 		do {
     90 			win->begy += dy;
     91 			win->begx += dx;
     92 			__swflags(win);
     93 			win = win->nextp;
     94 		} while (win != orig);
     95 	} else {
     96 		if (by < orig->begy || win->maxy + dy > orig->maxy)
     97 			return (ERR);
     98 		if (bx < orig->begx || win->maxx + dx > orig->maxx)
     99 			return (ERR);
    100 		win->begy = by;
    101 		win->begx = bx;
    102 		__swflags(win);
    103 		__set_subwin(orig, win);
    104 	}
    105 	__touchwin(win);
    106 	return (OK);
    107 }
    108