001: /* ====================================================================
002: * The JRefactory License, Version 1.0
003: *
004: * Copyright (c) 2001 JRefactory. All rights reserved.
005: *
006: * Redistribution and use in source and binary forms, with or without
007: * modification, are permitted provided that the following conditions
008: * are met:
009: *
010: * 1. Redistributions of source code must retain the above copyright
011: * notice, this list of conditions and the following disclaimer.
012: *
013: * 2. Redistributions in binary form must reproduce the above copyright
014: * notice, this list of conditions and the following disclaimer in
015: * the documentation and/or other materials provided with the
016: * distribution.
017: *
018: * 3. The end-user documentation included with the redistribution,
019: * if any, must include the following acknowledgment:
020: * "This product includes software developed by the
021: * JRefactory (http://www.sourceforge.org/projects/jrefactory)."
022: * Alternately, this acknowledgment may appear in the software itself,
023: * if and wherever such third-party acknowledgments normally appear.
024: *
025: * 4. The names "JRefactory" must not be used to endorse or promote
026: * products derived from this software without prior written
027: * permission. For written permission, please contact seguin@acm.org.
028: *
029: * 5. Products derived from this software may not be called "JRefactory",
030: * nor may "JRefactory" appear in their name, without prior written
031: * permission of Chris Seguin.
032: *
033: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
034: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
035: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
036: * DISCLAIMED. IN NO EVENT SHALL THE CHRIS SEGUIN OR
037: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
038: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
039: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
040: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
041: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
042: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
043: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
044: * SUCH DAMAGE.
045: * ====================================================================
046: *
047: * This software consists of voluntary contributions made by many
048: * individuals on behalf of JRefactory. For more information on
049: * JRefactory, please see
050: * <http://www.sourceforge.org/projects/jrefactory>.
051: */
052: package org.acm.seguin.ide.jbuilder;
053:
054: import java.awt.event.ActionEvent;
055: import java.beans.PropertyChangeSupport;
056: import java.beans.PropertyChangeListener;
057: import java.util.HashMap;
058: import javax.swing.Action;
059: import org.acm.seguin.ide.common.UndoAdapter;
060: import org.acm.seguin.refactor.undo.UndoStack;
061:
062: /**
063: * Performs the undo operation
064: *
065: *@author Chris Seguin
066: *@created October 18, 2001
067: */
068: public class UndoAction extends UndoAdapter implements Action {
069: private boolean enabled;
070: private PropertyChangeSupport support;
071: private HashMap values;
072:
073: /**
074: * Constructor for the UndoAction object
075: */
076: public UndoAction() {
077: support = new PropertyChangeSupport(this );
078: values = new HashMap();
079: enabled = true;
080:
081: putValue(NAME, "Undo");
082: putValue(SHORT_DESCRIPTION, "Undo Refactoring");
083: putValue(LONG_DESCRIPTION, "Undoes the last refactoring");
084: }
085:
086: /**
087: * Sets the Enabled attribute of the UndoAction object
088: *
089: *@param value The new Enabled value
090: */
091: public void setEnabled(boolean value) {
092: enabled = value;
093: }
094:
095: /**
096: * Gets the Value attribute of the UndoAction object
097: *
098: *@param key Description of Parameter
099: *@return The Value value
100: */
101: public Object getValue(String key) {
102: return values.get(key);
103: }
104:
105: /**
106: * Gets the Enabled attribute of the UndoAction object
107: *
108: *@return The Enabled value
109: */
110: public boolean isEnabled() {
111: if (!enabled) {
112: return false;
113: }
114:
115: return !UndoStack.get().isStackEmpty();
116: }
117:
118: /**
119: * Adds a feature to the PropertyChangeListener attribute of the
120: * UndoAction object
121: *
122: *@param listener The feature to be added to the PropertyChangeListener
123: * attribute
124: */
125: public void addPropertyChangeListener(
126: PropertyChangeListener listener) {
127: support.addPropertyChangeListener(listener);
128: }
129:
130: /**
131: * Sets the Value attribute of the UndoAction object
132: *
133: *@param key The new key value
134: *@param value The new value value
135: */
136: public void putValue(String key, Object value) {
137: Object oldValue = getValue(key);
138: Object newValue = value;
139: support.firePropertyChange(key, oldValue, newValue);
140: values.put(key, value);
141: }
142:
143: /**
144: * Removes a listener
145: *
146: *@param listener the listener to be removed
147: */
148: public void removePropertyChangeListener(
149: PropertyChangeListener listener) {
150: support.removePropertyChangeListener(listener);
151: }
152: }
153: // EOF
|