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 /*LINTLIBRARY*/ 41 42 #include <sys/types.h> 43 #include "curses_inc.h" 44 45 /* 46 * Make a derived window of an existing window. The two windows 47 * share the same character image. 48 * orig: the original window 49 * nl, nc: numbers of lines and columns 50 * by, bx: coordinates for upper-left corner of the derived 51 * window in the coord system of the parent window. 52 */ 53 54 WINDOW * 55 derwin(WINDOW *orig, int num_lines, int nc, int by, int bx) 56 { 57 int y; 58 WINDOW *win = (WINDOW *) NULL, *par; 59 chtype **w_y, **o_y; 60 #ifdef _VR3_COMPAT_CODE 61 _ochtype **w_y16, **o_y16; 62 #endif /* _VR3_COMPAT_CODE */ 63 64 /* make sure window fits inside the original one */ 65 if (by < 0 || (by + num_lines) > orig->_maxy || bx < 0 || 66 (bx + nc) > orig->_maxx) 67 goto done; 68 if (nc == 0) 69 nc = orig->_maxx - bx; 70 if (num_lines == 0) 71 num_lines = orig->_maxy - by; 72 73 /* Create the window skeleton */ 74 if ((win = _makenew(num_lines, nc, by + orig->_begy, 75 bx + orig->_begx)) == NULL) 76 goto done; 77 78 /* inheritance */ 79 /*LINTED*/ 80 win->_parx = (short) bx; 81 /*LINTED*/ 82 win->_pary = (short) by; 83 win->_bkgd = orig->_bkgd; 84 win->_attrs = orig->_attrs; 85 w_y = win->_y; 86 o_y = orig->_y; 87 88 #ifdef _VR3_COMPAT_CODE 89 if (_y16update) { 90 int hby = by; 91 92 w_y16 = win ->_y16; 93 o_y16 = orig->_y16; 94 95 for (y = 0; y < num_lines; y++, hby++) 96 w_y16[y] = o_y16[hby] + bx; 97 } 98 #endif /* _VR3_COMPAT_CODE */ 99 100 for (y = 0; y < num_lines; y++, by++) 101 w_y[y] = o_y[by] + bx; 102 103 win->_yoffset = orig->_yoffset; 104 105 /* update descendant number of ancestors */ 106 win->_parent = orig; 107 for (par = win->_parent; par != NULL; par = par->_parent) 108 par->_ndescs += 1; 109 110 done: 111 return (win); 112 } 113