1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
24*7c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
25*7c478bd9Sstevel@tonic-gate  */
26*7c478bd9Sstevel@tonic-gate 
27*7c478bd9Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T	*/
28*7c478bd9Sstevel@tonic-gate /*	  All Rights Reserved	*/
29*7c478bd9Sstevel@tonic-gate 
30*7c478bd9Sstevel@tonic-gate /*
31*7c478bd9Sstevel@tonic-gate  * University Copyright- Copyright (c) 1982, 1986, 1988
32*7c478bd9Sstevel@tonic-gate  * The Regents of the University of California
33*7c478bd9Sstevel@tonic-gate  * All Rights Reserved
34*7c478bd9Sstevel@tonic-gate  *
35*7c478bd9Sstevel@tonic-gate  * University Acknowledgment- Portions of this document are derived from
36*7c478bd9Sstevel@tonic-gate  * software developed by the University of California, Berkeley, and its
37*7c478bd9Sstevel@tonic-gate  * contributors.
38*7c478bd9Sstevel@tonic-gate  */
39*7c478bd9Sstevel@tonic-gate 
40*7c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
41*7c478bd9Sstevel@tonic-gate 
42*7c478bd9Sstevel@tonic-gate /*LINTLIBRARY*/
43*7c478bd9Sstevel@tonic-gate 
44*7c478bd9Sstevel@tonic-gate #include	<sys/types.h>
45*7c478bd9Sstevel@tonic-gate #include	"curses_inc.h"
46*7c478bd9Sstevel@tonic-gate 
47*7c478bd9Sstevel@tonic-gate /*
48*7c478bd9Sstevel@tonic-gate  *	Make a  derived window of an existing window. The two windows
49*7c478bd9Sstevel@tonic-gate  *	share the same character image.
50*7c478bd9Sstevel@tonic-gate  *		orig:	the original window
51*7c478bd9Sstevel@tonic-gate  *		nl, nc:	numbers of lines and columns
52*7c478bd9Sstevel@tonic-gate  *		by, bx:	coordinates for upper-left corner of the derived
53*7c478bd9Sstevel@tonic-gate  *			window in the coord system of the parent window.
54*7c478bd9Sstevel@tonic-gate  */
55*7c478bd9Sstevel@tonic-gate 
56*7c478bd9Sstevel@tonic-gate WINDOW	*
derwin(WINDOW * orig,int num_lines,int nc,int by,int bx)57*7c478bd9Sstevel@tonic-gate derwin(WINDOW *orig, int num_lines, int nc, int by, int bx)
58*7c478bd9Sstevel@tonic-gate {
59*7c478bd9Sstevel@tonic-gate 	int	y;
60*7c478bd9Sstevel@tonic-gate 	WINDOW	*win = (WINDOW *) NULL, *par;
61*7c478bd9Sstevel@tonic-gate 	chtype	**w_y, **o_y;
62*7c478bd9Sstevel@tonic-gate #ifdef	_VR3_COMPAT_CODE
63*7c478bd9Sstevel@tonic-gate 	_ochtype	**w_y16, **o_y16;
64*7c478bd9Sstevel@tonic-gate #endif	/* _VR3_COMPAT_CODE */
65*7c478bd9Sstevel@tonic-gate 
66*7c478bd9Sstevel@tonic-gate 	/* make sure window fits inside the original one */
67*7c478bd9Sstevel@tonic-gate 	if (by < 0 || (by + num_lines) > orig->_maxy || bx < 0 ||
68*7c478bd9Sstevel@tonic-gate 	    (bx + nc) > orig->_maxx)
69*7c478bd9Sstevel@tonic-gate 		goto done;
70*7c478bd9Sstevel@tonic-gate 	if (nc == 0)
71*7c478bd9Sstevel@tonic-gate 		nc = orig->_maxx - bx;
72*7c478bd9Sstevel@tonic-gate 	if (num_lines == 0)
73*7c478bd9Sstevel@tonic-gate 		num_lines = orig->_maxy - by;
74*7c478bd9Sstevel@tonic-gate 
75*7c478bd9Sstevel@tonic-gate 	/* Create the window skeleton */
76*7c478bd9Sstevel@tonic-gate 	if ((win = _makenew(num_lines, nc, by + orig->_begy,
77*7c478bd9Sstevel@tonic-gate 	    bx + orig->_begx)) == NULL)
78*7c478bd9Sstevel@tonic-gate 		goto done;
79*7c478bd9Sstevel@tonic-gate 
80*7c478bd9Sstevel@tonic-gate 	/* inheritance */
81*7c478bd9Sstevel@tonic-gate 	/*LINTED*/
82*7c478bd9Sstevel@tonic-gate 	win->_parx = (short) bx;
83*7c478bd9Sstevel@tonic-gate 	/*LINTED*/
84*7c478bd9Sstevel@tonic-gate 	win->_pary = (short) by;
85*7c478bd9Sstevel@tonic-gate 	win->_bkgd = orig->_bkgd;
86*7c478bd9Sstevel@tonic-gate 	win->_attrs = orig->_attrs;
87*7c478bd9Sstevel@tonic-gate 	w_y = win->_y;
88*7c478bd9Sstevel@tonic-gate 	o_y = orig->_y;
89*7c478bd9Sstevel@tonic-gate 
90*7c478bd9Sstevel@tonic-gate #ifdef	_VR3_COMPAT_CODE
91*7c478bd9Sstevel@tonic-gate 	if (_y16update) {
92*7c478bd9Sstevel@tonic-gate 		int	hby = by;
93*7c478bd9Sstevel@tonic-gate 
94*7c478bd9Sstevel@tonic-gate 		w_y16 = win ->_y16;
95*7c478bd9Sstevel@tonic-gate 		o_y16 = orig->_y16;
96*7c478bd9Sstevel@tonic-gate 
97*7c478bd9Sstevel@tonic-gate 		for (y = 0; y < num_lines; y++, hby++)
98*7c478bd9Sstevel@tonic-gate 			w_y16[y] = o_y16[hby] + bx;
99*7c478bd9Sstevel@tonic-gate 	}
100*7c478bd9Sstevel@tonic-gate #endif	/* _VR3_COMPAT_CODE */
101*7c478bd9Sstevel@tonic-gate 
102*7c478bd9Sstevel@tonic-gate 	for (y = 0; y < num_lines; y++, by++)
103*7c478bd9Sstevel@tonic-gate 		w_y[y] = o_y[by] + bx;
104*7c478bd9Sstevel@tonic-gate 
105*7c478bd9Sstevel@tonic-gate 	win->_yoffset = orig->_yoffset;
106*7c478bd9Sstevel@tonic-gate 
107*7c478bd9Sstevel@tonic-gate 	/* update descendant number of ancestors */
108*7c478bd9Sstevel@tonic-gate 	win->_parent = orig;
109*7c478bd9Sstevel@tonic-gate 	for (par = win->_parent; par != NULL; par = par->_parent)
110*7c478bd9Sstevel@tonic-gate 		par->_ndescs += 1;
111*7c478bd9Sstevel@tonic-gate 
112*7c478bd9Sstevel@tonic-gate done:
113*7c478bd9Sstevel@tonic-gate 	return (win);
114*7c478bd9Sstevel@tonic-gate }
115