author | dmarkov |
Wed, 16 Apr 2014 12:51:25 +0400 | |
changeset 24184 | 4da2f6ec4dab |
parent 23010 | 6dadb192ad81 |
child 25193 | 187a455af8f8 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2013, 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.text; |
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import java.awt.event.ActionEvent; |
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import java.awt.KeyboardFocusManager; |
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import java.awt.Component; |
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import java.util.Hashtable; |
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import java.util.Enumeration; |
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import javax.swing.Action; |
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import javax.swing.AbstractAction; |
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import javax.swing.KeyStroke; |
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/** |
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* An Action implementation useful for key bindings that are |
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* shared across a number of different text components. Because |
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* the action is shared, it must have a way of getting it's |
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* target to act upon. This class provides support to try and |
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* find a text component to operate on. The preferred way of |
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* getting the component to act upon is through the ActionEvent |
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* that is received. If the Object returned by getSource can |
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* be narrowed to a text component, it will be used. If the |
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* action event is null or can't be narrowed, the last focused |
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* text component is tried. This is determined by being |
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* used in conjunction with a JTextController which |
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* arranges to share that information with a TextAction. |
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* <p> |
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* <strong>Warning:</strong> |
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* Serialized objects of this class will not be compatible with |
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* future Swing releases. The current serialization support is |
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* appropriate for short term storage or RMI between applications running |
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* the same version of Swing. As of 1.4, support for long term storage |
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* of all JavaBeans™ |
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* has been added to the <code>java.beans</code> package. |
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* Please see {@link java.beans.XMLEncoder}. |
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* |
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* @author Timothy Prinzing |
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*/ |
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@SuppressWarnings("serial") // Same-version serialization only |
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public abstract class TextAction extends AbstractAction { |
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/** |
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* Creates a new JTextAction object. |
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* |
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* @param name the name of the action |
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*/ |
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public TextAction(String name) { |
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super(name); |
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} |
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/** |
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* Determines the component to use for the action. |
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* This if fetched from the source of the ActionEvent |
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* if it's not null and can be narrowed. Otherwise, |
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* the last focused component is used. |
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* |
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* @param e the ActionEvent |
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* @return the component |
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*/ |
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protected final JTextComponent getTextComponent(ActionEvent e) { |
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if (e != null) { |
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Object o = e.getSource(); |
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if (o instanceof JTextComponent) { |
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return (JTextComponent) o; |
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} |
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} |
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return getFocusedComponent(); |
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} |
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/** |
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* Takes one list of |
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* commands and augments it with another list |
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* of commands. The second list takes precedence |
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* over the first list; that is, when both lists |
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* contain a command with the same name, the command |
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* from the second list is used. |
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* |
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* @param list1 the first list, may be empty but not |
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* <code>null</code> |
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* @param list2 the second list, may be empty but not |
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* <code>null</code> |
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* @return the augmented list |
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*/ |
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public static final Action[] augmentList(Action[] list1, Action[] list2) { |
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Hashtable<String, Action> h = new Hashtable<String, Action>(); |
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for (Action a : list1) { |
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String value = (String)a.getValue(Action.NAME); |
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h.put((value!=null ? value:""), a); |
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} |
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for (Action a : list2) { |
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String value = (String)a.getValue(Action.NAME); |
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h.put((value!=null ? value:""), a); |
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} |
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Action[] actions = new Action[h.size()]; |
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int index = 0; |
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for (Enumeration e = h.elements() ; e.hasMoreElements() ;) { |
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actions[index++] = (Action) e.nextElement(); |
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} |
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return actions; |
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} |
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/** |
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* Fetches the text component that currently has focus. |
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* This allows actions to be shared across text components |
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* which is useful for key-bindings where a large set of |
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* actions are defined, but generally used the same way |
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* across many different components. |
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* |
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* @return the component |
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*/ |
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protected final JTextComponent getFocusedComponent() { |
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return JTextComponent.getFocusedComponent(); |
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} |
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} |