| /* TextAction.java -- |
| Copyright (C) 2002, 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package javax.swing.text; |
| |
| import java.awt.Point; |
| import java.awt.event.ActionEvent; |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| |
| import javax.swing.AbstractAction; |
| import javax.swing.Action; |
| import javax.swing.SwingConstants; |
| |
| /** |
| * TextAction |
| * @author Andrew Selkirk |
| */ |
| public abstract class TextAction extends AbstractAction |
| { |
| /** |
| * Constructor TextAction |
| * @param name TODO |
| */ |
| public TextAction(String name) |
| { |
| super(name); |
| } |
| |
| /** |
| * Returns the <code>JTextComponent</code> object associated with the given |
| * <code>ActionEvent</code>. If the source of the event is not a |
| * <code>JTextComponent</code> the currently focused text component is returned. |
| * |
| * @param event the action event |
| * |
| * @return the <code>JTextComponent</code> |
| */ |
| protected final JTextComponent getTextComponent(ActionEvent event) |
| { |
| if (event.getSource() instanceof JTextComponent) |
| return (JTextComponent) event.getSource(); |
| |
| return getFocusedComponent(); |
| } |
| |
| /** |
| * Creates a new array of <code>Action</code> containing both given arrays. |
| * |
| * @param list1 the first action array |
| * @param list2 the second action array |
| * |
| * @return the augmented array of actions |
| */ |
| public static final Action[] augmentList(Action[] list1, Action[] list2) |
| { |
| HashSet actionSet = new HashSet(); |
| |
| for (int i = 0; i < list1.length; ++i) |
| actionSet.add(list1[i]); |
| |
| for (int i = 0; i < list2.length; ++i) |
| actionSet.add(list2[i]); |
| |
| ArrayList list = new ArrayList(actionSet); |
| return (Action[]) list.toArray(new Action[actionSet.size()]); |
| } |
| |
| /** |
| * Returns the current focused <code>JTextComponent</code> object. |
| * |
| * @return the <code>JTextComponent</code> |
| */ |
| protected final JTextComponent getFocusedComponent() |
| { |
| return null; // TODO |
| } |
| |
| /** Abstract helper class which implements everything needed for an |
| * Action implementation in <code>DefaultEditorKit</code> which |
| * does horizontal movement (and selection). |
| */ |
| abstract static class HorizontalMovementAction extends TextAction |
| { |
| int dir; |
| |
| HorizontalMovementAction(String name, int direction) |
| { |
| super(name); |
| dir = direction; |
| } |
| |
| public void actionPerformed(ActionEvent event) |
| { |
| JTextComponent t = getTextComponent(event); |
| try |
| { |
| if (t != null) |
| { |
| int offs |
| = Utilities.getNextVisualPositionFrom(t, |
| t.getCaretPosition(), |
| dir); |
| |
| Caret c = t.getCaret(); |
| |
| actionPerformedImpl(c, offs); |
| |
| c.setMagicCaretPosition(t.modelToView(offs).getLocation()); |
| } |
| } |
| catch(BadLocationException ble) |
| { |
| throw |
| (InternalError) new InternalError("Illegal offset").initCause(ble); |
| } |
| |
| } |
| |
| protected abstract void actionPerformedImpl(Caret c, int offs) |
| throws BadLocationException; |
| } |
| |
| /** Abstract helper class which implements everything needed for an |
| * Action implementation in <code>DefaultEditorKit</code> which |
| * does vertical movement (and selection). |
| */ |
| abstract static class VerticalMovementAction extends TextAction |
| { |
| int dir; |
| |
| VerticalMovementAction(String name, int direction) |
| { |
| super(name); |
| dir = direction; |
| } |
| |
| public void actionPerformed(ActionEvent event) |
| { |
| JTextComponent t = getTextComponent(event); |
| try |
| { |
| if (t != null) |
| { |
| Caret c = t.getCaret(); |
| // The magic caret position may be null when the caret |
| // has not moved yet. |
| Point mcp = c.getMagicCaretPosition(); |
| |
| int pos; |
| if (mcp != null) |
| { |
| mcp.y = t.modelToView(c.getDot()).y; |
| pos = t.viewToModel(mcp); |
| } |
| else |
| pos = c.getDot(); |
| |
| pos = Utilities.getNextVisualPositionFrom(t, |
| t.getCaretPosition(), |
| dir); |
| |
| if (pos > -1) |
| actionPerformedImpl(c, pos); |
| } |
| } |
| catch(BadLocationException ble) |
| { |
| throw |
| (InternalError) new InternalError("Illegal offset").initCause(ble); |
| } |
| } |
| |
| protected abstract void actionPerformedImpl(Caret c, int offs) |
| throws BadLocationException; |
| |
| } |
| |
| |
| } |