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Diffstat (limited to 'libjava/classpath/javax/swing/TransferHandler.java')
-rw-r--r-- | libjava/classpath/javax/swing/TransferHandler.java | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/libjava/classpath/javax/swing/TransferHandler.java b/libjava/classpath/javax/swing/TransferHandler.java new file mode 100644 index 00000000000..96cb9d42abf --- /dev/null +++ b/libjava/classpath/javax/swing/TransferHandler.java @@ -0,0 +1,190 @@ +/* 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; + } +} |