1 /*
   2  * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 
  27 package sun.lwawt;
  28 
  29 import java.awt.Dimension;
  30 import java.awt.Point;
  31 import java.awt.TextField;
  32 import java.awt.event.ActionEvent;
  33 import java.awt.event.ActionListener;
  34 import java.awt.event.FocusEvent;
  35 import java.awt.peer.TextFieldPeer;
  36 
  37 import javax.swing.*;
  38 import javax.swing.text.JTextComponent;
  39 
  40 /**
  41  * Lightweight implementation of {@link TextFieldPeer}. Delegates most of the
  42  * work to the {@link JPasswordField}.
  43  */
  44 final class LWTextFieldPeer
  45         extends LWTextComponentPeer<TextField, JPasswordField>
  46         implements TextFieldPeer, ActionListener {
  47 
  48     LWTextFieldPeer(final TextField target,
  49                     final PlatformComponent platformComponent) {
  50         super(target, platformComponent);
  51     }
  52 
  53     @Override
  54     JPasswordField createDelegate() {
  55         return new JPasswordFieldDelegate();
  56     }
  57 
  58     @Override
  59     void initializeImpl() {
  60         super.initializeImpl();
  61         setEchoChar(getTarget().getEchoChar());
  62         synchronized (getDelegateLock()) {
  63             getDelegate().addActionListener(this);
  64         }
  65     }
  66 
  67     @Override
  68     public JTextComponent getTextComponent() {
  69         return getDelegate();
  70     }
  71 
  72     @Override
  73     public void setEchoChar(final char echoChar) {
  74         synchronized (getDelegateLock()) {
  75             getDelegate().setEchoChar(echoChar);
  76             final boolean cutCopyAllowed;
  77             final String focusInputMapKey;
  78             if (echoChar != 0) {
  79                 cutCopyAllowed = false;
  80                 focusInputMapKey = "PasswordField.focusInputMap";
  81             } else {
  82                 cutCopyAllowed = true;
  83                 focusInputMapKey = "TextField.focusInputMap";
  84             }
  85             getDelegate().putClientProperty("JPasswordField.cutCopyAllowed", cutCopyAllowed);
  86             InputMap inputMap = (InputMap) UIManager.get(focusInputMapKey);
  87             SwingUtilities.replaceUIInputMap(getDelegate(), JComponent.WHEN_FOCUSED, inputMap);
  88         }
  89     }
  90 
  91     @Override
  92     public Dimension getPreferredSize(final int columns) {
  93         return getMinimumSize(columns);
  94     }
  95 
  96     @Override
  97     public Dimension getMinimumSize(final int columns) {
  98         return getMinimumSize(1, columns);
  99     }
 100 
 101     @Override
 102     public void actionPerformed(final ActionEvent e) {
 103         postEvent(new ActionEvent(getTarget(), ActionEvent.ACTION_PERFORMED,
 104                 getText(), e.getWhen(), e.getModifiers()));
 105     }
 106 
 107     /**
 108      * Restoring native behavior. We should sets the selection range to zero,
 109      * when component lost its focus.
 110      *
 111      * @param e the focus event
 112      */
 113     @Override
 114     void handleJavaFocusEvent(final FocusEvent e) {
 115         if (e.getID() == FocusEvent.FOCUS_LOST) {
 116             // In order to de-select the selection
 117             setCaretPosition(0);
 118         }
 119         super.handleJavaFocusEvent(e);
 120     }
 121 
 122     @SuppressWarnings("serial")// Safe: outer class is non-serializable.
 123     private final class JPasswordFieldDelegate extends JPasswordField {
 124 
 125         // Empty non private constructor was added because access to this
 126         // class shouldn't be emulated by a synthetic accessor method.
 127         JPasswordFieldDelegate() {
 128             super();
 129         }
 130 
 131         @Override
 132         public void replaceSelection(String content) {
 133             getDocument().removeDocumentListener(LWTextFieldPeer.this);
 134             super.replaceSelection(content);
 135             // post only one text event in this case
 136             postTextEvent();
 137             getDocument().addDocumentListener(LWTextFieldPeer.this);
 138         }
 139 
 140         @Override
 141         public boolean hasFocus() {
 142             return getTarget().hasFocus();
 143         }
 144 
 145         @Override
 146         public Point getLocationOnScreen() {
 147             return LWTextFieldPeer.this.getLocationOnScreen();
 148         }
 149     }
 150 }