2 Copyright (C) 2002, 2004 Free Software Foundation, Inc.
4 This file is part of GNU Classpath.
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING. If not, write to the
18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module. An independent module is a module which is not derived from
33 or based on this library. If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so. If you do not wish to do so, delete this
36 exception statement from your version. */
39 package javax.swing.text;
41 import java.awt.Point;
42 import java.awt.event.ActionEvent;
43 import java.util.ArrayList;
44 import java.util.HashSet;
46 import javax.swing.AbstractAction;
47 import javax.swing.Action;
48 import javax.swing.SwingConstants;
52 * @author Andrew Selkirk
54 public abstract class TextAction extends AbstractAction
57 * Constructor TextAction
60 public TextAction(String name)
66 * Returns the <code>JTextComponent</code> object associated with the given
67 * <code>ActionEvent</code>. If the source of the event is not a
68 * <code>JTextComponent</code> the currently focused text component is returned.
70 * @param event the action event
72 * @return the <code>JTextComponent</code>
74 protected final JTextComponent getTextComponent(ActionEvent event)
76 if (event.getSource() instanceof JTextComponent)
77 return (JTextComponent) event.getSource();
79 return getFocusedComponent();
83 * Creates a new array of <code>Action</code> containing both given arrays.
85 * @param list1 the first action array
86 * @param list2 the second action array
88 * @return the augmented array of actions
90 public static final Action[] augmentList(Action[] list1, Action[] list2)
92 HashSet actionSet = new HashSet();
94 for (int i = 0; i < list1.length; ++i)
95 actionSet.add(list1[i]);
97 for (int i = 0; i < list2.length; ++i)
98 actionSet.add(list2[i]);
100 ArrayList list = new ArrayList(actionSet);
101 return (Action[]) list.toArray(new Action[actionSet.size()]);
105 * Returns the current focused <code>JTextComponent</code> object.
107 * @return the <code>JTextComponent</code>
109 protected final JTextComponent getFocusedComponent()
114 /** Abstract helper class which implements everything needed for an
115 * Action implementation in <code>DefaultEditorKit</code> which
116 * does horizontal movement (and selection).
118 abstract static class HorizontalMovementAction extends TextAction
122 HorizontalMovementAction(String name, int direction)
128 public void actionPerformed(ActionEvent event)
130 JTextComponent t = getTextComponent(event);
136 = Utilities.getNextVisualPositionFrom(t,
137 t.getCaretPosition(),
140 Caret c = t.getCaret();
142 actionPerformedImpl(c, offs);
144 c.setMagicCaretPosition(t.modelToView(offs).getLocation());
147 catch(BadLocationException ble)
150 (InternalError) new InternalError("Illegal offset").initCause(ble);
155 protected abstract void actionPerformedImpl(Caret c, int offs)
156 throws BadLocationException;
159 /** Abstract helper class which implements everything needed for an
160 * Action implementation in <code>DefaultEditorKit</code> which
161 * does vertical movement (and selection).
163 abstract static class VerticalMovementAction extends TextAction
167 VerticalMovementAction(String name, int direction)
173 public void actionPerformed(ActionEvent event)
175 JTextComponent t = getTextComponent(event);
180 Caret c = t.getCaret();
181 // The magic caret position may be null when the caret
182 // has not moved yet.
183 Point mcp = c.getMagicCaretPosition();
188 mcp.y = t.modelToView(c.getDot()).y;
189 pos = t.viewToModel(mcp);
194 pos = Utilities.getNextVisualPositionFrom(t,
195 t.getCaretPosition(),
199 actionPerformedImpl(c, pos);
202 catch(BadLocationException ble)
205 (InternalError) new InternalError("Illegal offset").initCause(ble);
209 protected abstract void actionPerformedImpl(Caret c, int offs)
210 throws BadLocationException;