| /* |
| * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package javax.swing; |
| |
| import java.awt.*; |
| import java.awt.event.*; |
| import java.beans.*; |
| import java.util.Hashtable; |
| import java.util.Enumeration; |
| import java.io.Serializable; |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.security.AccessController; |
| import javax.swing.event.SwingPropertyChangeSupport; |
| import sun.security.action.GetPropertyAction; |
| |
| /** |
| * This class provides default implementations for the JFC <code>Action</code> |
| * interface. Standard behaviors like the get and set methods for |
| * <code>Action</code> object properties (icon, text, and enabled) are defined |
| * here. The developer need only subclass this abstract class and |
| * define the <code>actionPerformed</code> method. |
| * <p> |
| * <strong>Warning:</strong> |
| * Serialized objects of this class will not be compatible with |
| * future Swing releases. The current serialization support is |
| * appropriate for short term storage or RMI between applications running |
| * the same version of Swing. As of 1.4, support for long term storage |
| * of all JavaBeans<sup><font size="-2">TM</font></sup> |
| * has been added to the <code>java.beans</code> package. |
| * Please see {@link java.beans.XMLEncoder}. |
| * |
| * @author Georges Saab |
| * @see Action |
| */ |
| public abstract class AbstractAction implements Action, Cloneable, Serializable |
| { |
| /** |
| * Whether or not actions should reconfigure all properties on null. |
| */ |
| private static Boolean RECONFIGURE_ON_NULL; |
| |
| /** |
| * Specifies whether action is enabled; the default is true. |
| */ |
| protected boolean enabled = true; |
| |
| |
| /** |
| * Contains the array of key bindings. |
| */ |
| private transient ArrayTable arrayTable; |
| |
| /** |
| * Whether or not to reconfigure all action properties from the |
| * specified event. |
| */ |
| static boolean shouldReconfigure(PropertyChangeEvent e) { |
| if (e.getPropertyName() == null) { |
| synchronized(AbstractAction.class) { |
| if (RECONFIGURE_ON_NULL == null) { |
| RECONFIGURE_ON_NULL = Boolean.valueOf( |
| AccessController.doPrivileged(new GetPropertyAction( |
| "swing.actions.reconfigureOnNull", "false"))); |
| } |
| return RECONFIGURE_ON_NULL; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Sets the enabled state of a component from an Action. |
| * |
| * @param c the Component to set the enabled state on |
| * @param a the Action to set the enabled state from, may be null |
| */ |
| static void setEnabledFromAction(JComponent c, Action a) { |
| c.setEnabled((a != null) ? a.isEnabled() : true); |
| } |
| |
| /** |
| * Sets the tooltip text of a component from an Action. |
| * |
| * @param c the Component to set the tooltip text on |
| * @param a the Action to set the tooltip text from, may be null |
| */ |
| static void setToolTipTextFromAction(JComponent c, Action a) { |
| c.setToolTipText(a != null ? |
| (String)a.getValue(Action.SHORT_DESCRIPTION) : null); |
| } |
| |
| static boolean hasSelectedKey(Action a) { |
| return (a != null && a.getValue(Action.SELECTED_KEY) != null); |
| } |
| |
| static boolean isSelected(Action a) { |
| return Boolean.TRUE.equals(a.getValue(Action.SELECTED_KEY)); |
| } |
| |
| |
| |
| /** |
| * Creates an {@code Action}. |
| */ |
| public AbstractAction() { |
| } |
| |
| /** |
| * Creates an {@code Action} with the specified name. |
| * |
| * @param name the name ({@code Action.NAME}) for the action; a |
| * value of {@code null} is ignored |
| */ |
| public AbstractAction(String name) { |
| putValue(Action.NAME, name); |
| } |
| |
| /** |
| * Creates an {@code Action} with the specified name and small icon. |
| * |
| * @param name the name ({@code Action.NAME}) for the action; a |
| * value of {@code null} is ignored |
| * @param icon the small icon ({@code Action.SMALL_ICON}) for the action; a |
| * value of {@code null} is ignored |
| */ |
| public AbstractAction(String name, Icon icon) { |
| this(name); |
| putValue(Action.SMALL_ICON, icon); |
| } |
| |
| /** |
| * Gets the <code>Object</code> associated with the specified key. |
| * |
| * @param key a string containing the specified <code>key</code> |
| * @return the binding <code>Object</code> stored with this key; if there |
| * are no keys, it will return <code>null</code> |
| * @see Action#getValue |
| */ |
| public Object getValue(String key) { |
| if (key == "enabled") { |
| return enabled; |
| } |
| if (arrayTable == null) { |
| return null; |
| } |
| return arrayTable.get(key); |
| } |
| |
| /** |
| * Sets the <code>Value</code> associated with the specified key. |
| * |
| * @param key the <code>String</code> that identifies the stored object |
| * @param newValue the <code>Object</code> to store using this key |
| * @see Action#putValue |
| */ |
| public void putValue(String key, Object newValue) { |
| Object oldValue = null; |
| if (key == "enabled") { |
| // Treat putValue("enabled") the same way as a call to setEnabled. |
| // If we don't do this it means the two may get out of sync, and a |
| // bogus property change notification would be sent. |
| // |
| // To avoid dependencies between putValue & setEnabled this |
| // directly changes enabled. If we instead called setEnabled |
| // to change enabled, it would be possible for stack |
| // overflow in the case where a developer implemented setEnabled |
| // in terms of putValue. |
| if (newValue == null || !(newValue instanceof Boolean)) { |
| newValue = false; |
| } |
| oldValue = enabled; |
| enabled = (Boolean)newValue; |
| } else { |
| if (arrayTable == null) { |
| arrayTable = new ArrayTable(); |
| } |
| if (arrayTable.containsKey(key)) |
| oldValue = arrayTable.get(key); |
| // Remove the entry for key if newValue is null |
| // else put in the newValue for key. |
| if (newValue == null) { |
| arrayTable.remove(key); |
| } else { |
| arrayTable.put(key,newValue); |
| } |
| } |
| firePropertyChange(key, oldValue, newValue); |
| } |
| |
| /** |
| * Returns true if the action is enabled. |
| * |
| * @return true if the action is enabled, false otherwise |
| * @see Action#isEnabled |
| */ |
| public boolean isEnabled() { |
| return enabled; |
| } |
| |
| /** |
| * Sets whether the {@code Action} is enabled. The default is {@code true}. |
| * |
| * @param newValue {@code true} to enable the action, {@code false} to |
| * disable it |
| * @see Action#setEnabled |
| */ |
| public void setEnabled(boolean newValue) { |
| boolean oldValue = this.enabled; |
| |
| if (oldValue != newValue) { |
| this.enabled = newValue; |
| firePropertyChange("enabled", |
| Boolean.valueOf(oldValue), Boolean.valueOf(newValue)); |
| } |
| } |
| |
| |
| /** |
| * Returns an array of <code>Object</code>s which are keys for |
| * which values have been set for this <code>AbstractAction</code>, |
| * or <code>null</code> if no keys have values set. |
| * @return an array of key objects, or <code>null</code> if no |
| * keys have values set |
| * @since 1.3 |
| */ |
| public Object[] getKeys() { |
| if (arrayTable == null) { |
| return null; |
| } |
| Object[] keys = new Object[arrayTable.size()]; |
| arrayTable.getKeys(keys); |
| return keys; |
| } |
| |
| /** |
| * If any <code>PropertyChangeListeners</code> have been registered, the |
| * <code>changeSupport</code> field describes them. |
| */ |
| protected SwingPropertyChangeSupport changeSupport; |
| |
| /** |
| * Supports reporting bound property changes. This method can be called |
| * when a bound property has changed and it will send the appropriate |
| * <code>PropertyChangeEvent</code> to any registered |
| * <code>PropertyChangeListeners</code>. |
| */ |
| protected void firePropertyChange(String propertyName, Object oldValue, Object newValue) { |
| if (changeSupport == null || |
| (oldValue != null && newValue != null && oldValue.equals(newValue))) { |
| return; |
| } |
| changeSupport.firePropertyChange(propertyName, oldValue, newValue); |
| } |
| |
| |
| /** |
| * Adds a <code>PropertyChangeListener</code> to the listener list. |
| * The listener is registered for all properties. |
| * <p> |
| * A <code>PropertyChangeEvent</code> will get fired in response to setting |
| * a bound property, e.g. <code>setFont</code>, <code>setBackground</code>, |
| * or <code>setForeground</code>. |
| * Note that if the current component is inheriting its foreground, |
| * background, or font from its container, then no event will be |
| * fired in response to a change in the inherited property. |
| * |
| * @param listener The <code>PropertyChangeListener</code> to be added |
| * |
| * @see Action#addPropertyChangeListener |
| */ |
| public synchronized void addPropertyChangeListener(PropertyChangeListener listener) { |
| if (changeSupport == null) { |
| changeSupport = new SwingPropertyChangeSupport(this); |
| } |
| changeSupport.addPropertyChangeListener(listener); |
| } |
| |
| |
| /** |
| * Removes a <code>PropertyChangeListener</code> from the listener list. |
| * This removes a <code>PropertyChangeListener</code> that was registered |
| * for all properties. |
| * |
| * @param listener the <code>PropertyChangeListener</code> to be removed |
| * |
| * @see Action#removePropertyChangeListener |
| */ |
| public synchronized void removePropertyChangeListener(PropertyChangeListener listener) { |
| if (changeSupport == null) { |
| return; |
| } |
| changeSupport.removePropertyChangeListener(listener); |
| } |
| |
| |
| /** |
| * Returns an array of all the <code>PropertyChangeListener</code>s added |
| * to this AbstractAction with addPropertyChangeListener(). |
| * |
| * @return all of the <code>PropertyChangeListener</code>s added or an empty |
| * array if no listeners have been added |
| * @since 1.4 |
| */ |
| public synchronized PropertyChangeListener[] getPropertyChangeListeners() { |
| if (changeSupport == null) { |
| return new PropertyChangeListener[0]; |
| } |
| return changeSupport.getPropertyChangeListeners(); |
| } |
| |
| |
| /** |
| * Clones the abstract action. This gives the clone |
| * its own copy of the key/value list, |
| * which is not handled for you by <code>Object.clone()</code>. |
| **/ |
| |
| protected Object clone() throws CloneNotSupportedException { |
| AbstractAction newAction = (AbstractAction)super.clone(); |
| synchronized(this) { |
| if (arrayTable != null) { |
| newAction.arrayTable = (ArrayTable)arrayTable.clone(); |
| } |
| } |
| return newAction; |
| } |
| |
| private void writeObject(ObjectOutputStream s) throws IOException { |
| // Store the default fields |
| s.defaultWriteObject(); |
| |
| // And the keys |
| ArrayTable.writeArrayTable(s, arrayTable); |
| } |
| |
| private void readObject(ObjectInputStream s) throws ClassNotFoundException, |
| IOException { |
| s.defaultReadObject(); |
| for (int counter = s.readInt() - 1; counter >= 0; counter--) { |
| putValue((String)s.readObject(), s.readObject()); |
| } |
| } |
| } |
