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 * ident "%Z%%M% %I% %E% SMI" 24 * 25 * Copyright (c) 1999-2001 by Sun Microsystems, Inc. 26 * All rights reserved. 27 */ 28 package com.sun.dhcpmgr.client; 29 30 import java.awt.*; 31 import java.awt.event.*; 32 import javax.swing.*; 33 import javax.swing.text.*; 34 35 /** 36 * A text field which enforces the syntax rules for the name field in the 37 * dhcptab. At present, all characters must be printable ASCII, but not the 38 * comment introduction character '#'. 39 */ 40 public class DhcptabNameField extends JTextField { 41 42 /** 43 * Constructs a field initialized to the provided text. Defaults to 44 * 20 characters wide. 45 * @param text the text to display initially 46 */ 47 public DhcptabNameField(String text) { 48 this(text, 20); 49 } 50 51 /** 52 * Constructs a field initialized to the provided text with the requested 53 * size. 54 * @param text the text to display initially 55 * @param length the length in characters the field should size itself to 56 */ 57 public DhcptabNameField(String text, int length) { 58 super(text, length); 59 } 60 61 protected Document createDefaultModel() { 62 return new DhcptabNameDocument(); 63 } 64 } 65 66 /** 67 * This is the recommended way to validate input, as opposed to trapping 68 * KeyEvents because this will actually catch paste operations as well. 69 */ 70 class DhcptabNameDocument extends PlainDocument { 71 public void insertString(int offs, String str, AttributeSet a) 72 throws BadLocationException { 73 if (str != null) { 74 char [] chars = str.toCharArray(); 75 for (int i = 0; i < chars.length; ++i) { 76 // Must be a printable ASCII char, but not the comment character 77 if (chars[i] < ' ' || chars[i] > '~' || chars[i] == '#') { 78 throw new BadLocationException("", offs); 79 } 80 } 81 } 82 super.insertString(offs, str, a); 83 } 84 }