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/*
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* Copyright (c) 2008, 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package javax.swing.colorchooser;
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import java.awt.event.FocusEvent;
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import java.awt.event.FocusListener;
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import java.text.ParseException;
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import static java.util.Locale.ENGLISH;
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import javax.swing.JFormattedTextField;
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import javax.swing.JFormattedTextField.AbstractFormatter;
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import javax.swing.SwingConstants;
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import javax.swing.SwingUtilities;
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import javax.swing.text.AttributeSet;
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import javax.swing.text.BadLocationException;
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import javax.swing.text.DefaultFormatterFactory;
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import javax.swing.text.DocumentFilter;
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@SuppressWarnings("serial") // Same-version serialization only
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final class ValueFormatter extends AbstractFormatter implements FocusListener, Runnable {
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static void init(int length, boolean hex, JFormattedTextField text) {
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ValueFormatter formatter = new ValueFormatter(length, hex);
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text.setColumns(length);
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text.setFormatterFactory(new DefaultFormatterFactory(formatter));
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text.setHorizontalAlignment(SwingConstants.RIGHT);
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text.setMinimumSize(text.getPreferredSize());
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text.addFocusListener(formatter);
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}
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private final DocumentFilter filter = new DocumentFilter() {
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@Override
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public void remove(FilterBypass fb, int offset, int length) throws BadLocationException {
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if (isValid(fb.getDocument().getLength() - length)) {
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fb.remove(offset, length);
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}
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}
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@Override
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public void replace(FilterBypass fb, int offset, int length, String text, AttributeSet set) throws BadLocationException {
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if (isValid(fb.getDocument().getLength() + text.length() - length) && isValid(text)) {
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fb.replace(offset, length, text.toUpperCase(ENGLISH), set);
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}
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}
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@Override
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public void insertString(FilterBypass fb, int offset, String text, AttributeSet set) throws BadLocationException {
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if (isValid(fb.getDocument().getLength() + text.length()) && isValid(text)) {
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fb.insertString(offset, text.toUpperCase(ENGLISH), set);
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}
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}
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};
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private final int length;
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private final int radix;
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private JFormattedTextField text;
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ValueFormatter(int length, boolean hex) {
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this.length = length;
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this.radix = hex ? 16 : 10;
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}
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@Override
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public Object stringToValue(String text) throws ParseException {
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try {
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return Integer.valueOf(text, this.radix);
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}
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catch (NumberFormatException nfe) {
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ParseException pe = new ParseException("illegal format", 0);
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pe.initCause(nfe);
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throw pe;
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}
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}
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@Override
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public String valueToString(Object object) throws ParseException {
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if (object instanceof Integer) {
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if (this.radix == 10) {
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return object.toString();
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}
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int value = (Integer) object;
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int index = this.length;
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char[] array = new char[index];
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while (0 < index--) {
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array[index] = Character.forDigit(value & 0x0F, this.radix);
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value >>= 4;
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}
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return new String(array).toUpperCase(ENGLISH);
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}
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throw new ParseException("illegal object", 0);
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}
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@Override
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protected DocumentFilter getDocumentFilter() {
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return this.filter;
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}
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public void focusGained(FocusEvent event) {
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Object source = event.getSource();
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if (source instanceof JFormattedTextField) {
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this.text = (JFormattedTextField) source;
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SwingUtilities.invokeLater(this);
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}
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}
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public void focusLost(FocusEvent event) {
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}
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public void run() {
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if (this.text != null) {
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this.text.selectAll();
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}
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}
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private boolean isValid(int length) {
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return (0 <= length) && (length <= this.length);
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}
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private boolean isValid(String text) {
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int length = text.length();
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for (int i = 0; i < length; i++) {
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char ch = text.charAt(i);
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if (Character.digit(ch, this.radix) < 0) {
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return false;
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}
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}
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return true;
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}
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}
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