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