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