/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @author Evgeniya G. Maenkova
* @version $Revision$
*/
package javax.swing.text;
import java.awt.Color;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.Shape;
import org.apache.harmony.awt.text.TextFieldKit;
import org.apache.harmony.awt.text.TextUtils;
import org.apache.harmony.x.swing.internal.nls.Messages;
public class PasswordView extends FieldView {
private static final char DEFAULT_ECHO_CHAR = '*';
public PasswordView(final Element element) {
super(element);
}
protected int drawEchoCharacter(final Graphics g,
final int x,
final int y,
final char c) {
g.drawString(String.valueOf(c), x, y);
return getFontMetrics().charWidth(c) + x;
}
protected int drawSelectedText(final Graphics g,
final int x,
final int y,
final int p0,
final int p1) throws BadLocationException {
return echoCharIsSet()
? drawString(g, paintParams.selColor, p0, p1, x, y)
: super.drawSelectedText(g, x, y, p0, p1);
}
protected int drawUnselectedText(final Graphics g,
final int x,
final int y,
final int p0,
final int p1)
throws BadLocationException {
return echoCharIsSet()
? drawString(g, paintParams.color, p0, p1, x, y)
: super.drawUnselectedText(g, x, y, p0, p1);
}
public float getPreferredSpan(final int axis) {
if (axis == Y_AXIS || !echoCharIsSet()) {
return super.getPreferredSpan(axis);
} else {
return getFontMetrics().stringWidth(getText());
}
}
public Shape modelToView(final int pos,
final Shape shape,
final Position.Bias b)
throws BadLocationException {
if (echoCharIsSet()) {
String text = getText();
if (pos < 0 || pos > text.length()) {
throw new BadLocationException(Messages.getString("swing.95", pos), //$NON-NLS-1$
pos);
}
if (shape == null) {
return null;
}
text = text.substring(0, pos);
Rectangle rect = getOldAllocation(shape);
FontMetrics fontMetrics = getFontMetrics();
return new Rectangle(rect.x + fontMetrics.stringWidth(text),
rect.y, 1, fontMetrics.getHeight());
} else {
return super.modelToView(pos, shape, b);
}
}
public int viewToModel(final float x,
final float y,
final Shape shape,
final Position.Bias[] biasRet) {
if (echoCharIsSet()) {
biasRet[0] = Position.Bias.Forward;
String text = getText();
return getTextOffset(text, (int) x - shape.getBounds().x);
} else {
return super.viewToModel(x, y, shape, biasRet);
}
}
private TextFieldKit getPasswordTextKit() {
return TextUtils.getTextFieldKit(getComponent());
}
private boolean echoCharIsSet() {
TextFieldKit tfk = getPasswordTextKit();
return tfk != null && tfk.echoCharIsSet();
}
private char getEchoChar() {
TextFieldKit tfk = getPasswordTextKit();
return tfk != null ? tfk.getEchoChar() : DEFAULT_ECHO_CHAR;
}
private String getText() {
TextFieldKit tfk = getPasswordTextKit();
if (tfk == null) {
return "";
}
int length = getDocument().getLength();
char echo = tfk.getEchoChar();
String result = "";
for (int i = 0; i < length; i++) {
result += echo;
}
return result;
}
private int getTextLength() {
Document doc = getDocument();
return doc != null ? doc.getLength() : 0;
}
private int drawString(final Graphics g, final Color color,
final int p0,
final int p1,
final int x,
final int y) throws BadLocationException {
int length = getTextLength();
if (p0 < 0) {
throw new BadLocationException(Messages.getString("swing.96"), p0); //$NON-NLS-1$
} else if (p1 < p0 || p1 > length) {
throw new BadLocationException(Messages.getString("swing.96"), p1); //$NON-NLS-1$
}
Color old = g.getColor();
g.setColor(color);
int result = x;
char echo = getEchoChar();
for (int i = 0; i < p1 - p0; i++) {
result = drawEchoCharacter(g, result, y, echo);
}
g.setColor(old);
return result;
}
private int getTextOffset(final String text,
final int width) {
int index = 0;
int length = text.length();
while (getFontMetrics().stringWidth(text.substring(0, index)) < width) {
if (index++ == length) {
return length;
}
}
return index;
}
}