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mvwin.c revision 1.16 
      1 /*	$NetBSD: mvwin.c,v 1.16 2011/09/15 11:58:05 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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)mvwin.c	8.2 (Berkeley) 5/4/94";
     36 #else
     37 __RCSID("$NetBSD: mvwin.c,v 1.16 2011/09/15 11:58:05 blymn Exp $");
     38 #endif
     39 #endif				/* not lint */
     40 
     41 #include "curses.h"
     42 #include "curses_private.h"
     43 
     44 /*
     45  * mvderwin --
     46  *      Move a derived window.  This does not change the physical screen
     47  * coordinates of the subwin, rather maps the characters in the subwin
     48  * sized part of the parent window starting at dy, dx into the subwin.
     49  *
     50  */
     51 int
     52 mvderwin(WINDOW *win, int dy, int dx)
     53 {
     54 	WINDOW *parent;
     55 	int ox, oy, i;
     56 
     57 	if (win == NULL)
     58 		return ERR;
     59 
     60 	parent = win->orig;
     61 
     62 	if (parent == NULL)
     63 		return ERR;
     64 
     65 	if (((win->maxx + dx) > parent->maxx) ||
     66 	    ((win->maxy + dy) > parent->maxy))
     67 		return ERR;
     68 
     69 	ox = win->begx;
     70 	oy = win->begy;
     71 
     72 	win->begx = parent->begx + dx;
     73 	win->begy = parent->begy + dy;
     74 
     75 	__set_subwin(parent, win);
     76 
     77 	win->begx = ox;
     78 	win->begy = oy;
     79 
     80 	for (i = 0; i < win->maxy; i++)
     81                 win->alines[i]->flags = __ISDIRTY;
     82 
     83 	return OK;
     84 }
     85 
     86 /*
     87  * mvwin --
     88  *	Relocate the starting position of a window.
     89  */
     90 int
     91 mvwin(WINDOW *win, int by, int bx)
     92 {
     93 	WINDOW *orig;
     94 	int     dy, dx;
     95 
     96 	if (by < 0 || by + win->maxy > LINES || bx < 0 || bx + win->maxx > COLS)
     97 		return (ERR);
     98 	dy = by - win->begy;
     99 	dx = bx - win->begx;
    100 	orig = win->orig;
    101 	if (orig == NULL) {
    102 		orig = win;
    103 		do {
    104 			win->begy += dy;
    105 			win->begx += dx;
    106 			__swflags(win);
    107 			win = win->nextp;
    108 		} while (win != orig);
    109 	} else {
    110 		if (by < orig->begy || win->maxy + dy > orig->maxy)
    111 			return (ERR);
    112 		if (bx < orig->begx || win->maxx + dx > orig->maxx)
    113 			return (ERR);
    114 		win->begy = by;
    115 		win->begx = bx;
    116 		__swflags(win);
    117 		__set_subwin(orig, win);
    118 	}
    119 	__touchwin(win);
    120 	return (OK);
    121 }
    122