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+/* TransferHandler.java --
+ Copyright (C) 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;
+
+import java.awt.datatransfer.Clipboard;
+import java.awt.datatransfer.DataFlavor;
+import java.awt.datatransfer.Transferable;
+import java.awt.event.ActionEvent;
+import java.awt.event.InputEvent;
+import java.io.Serializable;
+
+public class TransferHandler implements Serializable
+{
+ static class TransferAction extends AbstractAction
+ {
+ private String command;
+
+ public TransferAction(String command)
+ {
+ this.command = command;
+ }
+
+ public void actionPerformed(ActionEvent event)
+ {
+ JComponent component = (JComponent) event.getSource();
+ TransferHandler transferHandler = component.getTransferHandler();
+ Clipboard clipboard = getClipboard(component);
+
+ if (command.equals(COMMAND_COPY))
+ transferHandler.exportToClipboard(component, clipboard, COPY);
+ else if (command.equals(COMMAND_CUT))
+ transferHandler.exportToClipboard(component, clipboard, MOVE);
+ else if (command.equals(COMMAND_PASTE))
+ {
+ Transferable transferable = clipboard.getContents(null);
+
+ if (transferable != null)
+ transferHandler.importData(component, transferable);
+ }
+ }
+
+ private static Clipboard getClipboard(JComponent component)
+ {
+ SecurityManager sm = System.getSecurityManager();
+
+ if (sm != null)
+ {
+ try
+ {
+ sm.checkSystemClipboardAccess();
+
+ // We may access system clipboard.
+ return component.getToolkit().getSystemClipboard();
+ }
+ catch (SecurityException e)
+ {
+ // We may not access system clipboard.
+ }
+ }
+
+ // Create VM-local clipboard if non exists yet.
+ if (clipboard == null)
+ clipboard = new Clipboard("Clipboard");
+
+ return clipboard;
+ }
+ }
+
+ private static final long serialVersionUID = -967749805571669910L;
+
+ private static final String COMMAND_COPY = "copy";
+ private static final String COMMAND_CUT = "cut";
+ private static final String COMMAND_PASTE = "paste";
+
+ public static final int NONE = 0;
+ public static final int COPY = 1;
+ public static final int MOVE = 2;
+ public static final int COPY_OR_MOVE = 3;
+
+ private static Action copyAction = new TransferAction(COMMAND_COPY);
+ private static Action cutAction = new TransferAction(COMMAND_CUT);
+ private static Action pasteAction = new TransferAction(COMMAND_PASTE);
+
+ /**
+ * Clipboard if system clipboard may not be used.
+ * Package-private to avoid an accessor method.
+ */
+ static Clipboard clipboard;
+
+ private int sourceActions;
+ private Icon visualRepresentation;
+
+ public static Action getCopyAction()
+ {
+ return copyAction;
+ }
+
+ public static Action getCutAction()
+ {
+ return cutAction;
+ }
+
+ public static Action getPasteAction()
+ {
+ return pasteAction;
+ }
+
+ protected TransferHandler()
+ {
+ this.sourceActions = NONE;
+ }
+
+ public TransferHandler(String property)
+ {
+ this.sourceActions = property != null ? COPY : NONE;
+ }
+
+ public boolean canImport (JComponent c, DataFlavor[] flavors)
+ {
+ return false;
+ }
+
+ protected Transferable createTransferable(JComponent c)
+ {
+ return null;
+ }
+
+ public void exportAsDrag (JComponent c, InputEvent e, int action)
+ {
+ }
+
+ protected void exportDone (JComponent c, Transferable data, int action)
+ {
+ }
+
+ public void exportToClipboard(JComponent c, Clipboard clip, int action)
+ {
+ }
+
+ public int getSourceActions (JComponent c)
+ {
+ return sourceActions;
+ }
+
+ public Icon getVisualRepresentation (Transferable t)
+ {
+ return visualRepresentation;
+ }
+
+ public boolean importData (JComponent c, Transferable t)
+ {
+ return false;
+ }
+}