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+/* 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.Component;
+import java.awt.KeyboardFocusManager;
+import java.awt.Point;
+import java.awt.event.ActionEvent;
+import java.util.HashMap;
+import java.util.Iterator;
+
+import javax.swing.AbstractAction;
+import javax.swing.Action;
+
+/**
+ * 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)
+ {
+ JTextComponent target = null;
+ if (event != null)
+ {
+ Object source = event.getSource();
+ if (source instanceof JTextComponent)
+ target = (JTextComponent) source;
+ }
+ if (target == null)
+ target = getFocusedComponent();
+ return target;
+ }
+
+ /**
+ * 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)
+ {
+ HashMap<Object,Action> actions = new HashMap<Object,Action>();
+
+ for (int i = 0; i < list1.length; ++i)
+ {
+ Action a = list1[i];
+ Object name = a.getValue(Action.NAME);
+ actions.put(name != null ? name : "", a);
+ }
+
+ for (int i = 0; i < list2.length; ++i)
+ {
+ Action a = list2[i];
+ Object name = a.getValue(Action.NAME);
+ actions.put(name != null ? name : "", a);
+ }
+ Action[] augmented = new Action[actions.size()];
+
+ int i = 0;
+ for (Iterator<Action> it = actions.values().iterator(); it.hasNext(); i++)
+ augmented[i] = it.next();
+ return augmented;
+
+ }
+
+ /**
+ * Returns the current focused <code>JTextComponent</code> object.
+ *
+ * @return the <code>JTextComponent</code>
+ */
+ protected final JTextComponent getFocusedComponent()
+ {
+ KeyboardFocusManager kfm =
+ KeyboardFocusManager.getCurrentKeyboardFocusManager();
+ Component focused = kfm.getPermanentFocusOwner();
+ JTextComponent textComp = null;
+ if (focused instanceof JTextComponent)
+ textComp = (JTextComponent) focused;
+ return textComp;
+ }
+
+ /** 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;
+
+ }
+
+
+}