| /* |
| * Copyright 1996-2003 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| package sun.awt.motif; |
| |
| import java.awt.datatransfer.ClipboardOwner; |
| import java.awt.datatransfer.Transferable; |
| |
| import java.io.IOException; |
| |
| import java.security.AccessController; |
| |
| import sun.awt.datatransfer.SunClipboard; |
| import sun.awt.datatransfer.TransferableProxy; |
| import sun.awt.datatransfer.DataTransferer; |
| |
| import sun.security.action.GetIntegerAction; |
| |
| |
| /** |
| * A class which interfaces with the X11 selection service in order to support |
| * data transfer via Clipboard operations. Most of the work is provided by |
| * sun.awt.datatransfer.DataTransferer. |
| * |
| * @author Amy Fowler |
| * @author Roger Brinkley |
| * @author Danila Sinopalnikov |
| * @author Alexander Gerasimov |
| * |
| * @since JDK1.1 |
| */ |
| public class X11Clipboard extends SunClipboard implements X11SelectionHolder { |
| |
| private final X11Selection clipboardSelection; |
| |
| private static final Object classLock = new Object(); |
| |
| private static final int defaultPollInterval = 200; |
| |
| private static int pollInterval; |
| |
| private static int listenedClipboardsCount; |
| |
| /** |
| * Creates a system clipboard object. |
| */ |
| public X11Clipboard(String name, String selectionName) { |
| super(name); |
| clipboardSelection = new X11Selection(selectionName, this); |
| } |
| |
| protected void setContentsNative(Transferable contents) { |
| if (!clipboardSelection.getSelectionOwnership(contents, this)) { |
| // Need to figure out how to inform owner the request failed... |
| this.owner = null; |
| this.contents = null; |
| } |
| } |
| |
| public long getID() { |
| return clipboardSelection.atom; |
| } |
| |
| // NOTE: This method may be called by privileged threads. |
| // DO NOT INVOKE CLIENT CODE ON THIS THREAD! |
| public void lostSelectionOwnership() { |
| lostOwnershipImpl(); |
| } |
| |
| protected void clearNativeContext() { |
| clipboardSelection.clearNativeContext(); |
| } |
| |
| protected long[] getClipboardFormats() { |
| return getClipboardFormats(getID()); |
| } |
| private static native long[] getClipboardFormats(long clipboardID); |
| |
| protected byte[] getClipboardData(long format) |
| throws IOException { |
| return getClipboardData(getID(), format); |
| } |
| private static native byte[] getClipboardData(long clipboardID, long format) |
| throws IOException; |
| |
| |
| // Called on the toolkit thread under awtLock. |
| public void checkChange(long[] formats) { |
| if (!clipboardSelection.isOwner()) { |
| super.checkChange(formats); |
| } |
| } |
| |
| void checkChangeHere(Transferable contents) { |
| if (areFlavorListenersRegistered()) { |
| super.checkChange(DataTransferer.getInstance(). |
| getFormatsForTransferableAsArray(contents, flavorMap)); |
| } |
| } |
| |
| protected void registerClipboardViewerChecked() { |
| if (pollInterval <= 0) { |
| pollInterval = ((Integer)AccessController.doPrivileged( |
| new GetIntegerAction("awt.datatransfer.clipboard.poll.interval", |
| defaultPollInterval))).intValue(); |
| if (pollInterval <= 0) { |
| pollInterval = defaultPollInterval; |
| } |
| } |
| synchronized (X11Clipboard.classLock) { |
| if (listenedClipboardsCount++ == 0) { |
| registerClipboardViewer(pollInterval); |
| } |
| } |
| } |
| |
| private native void registerClipboardViewer(int pollInterval); |
| |
| protected void unregisterClipboardViewerChecked() { |
| synchronized (X11Clipboard.classLock) { |
| if (--listenedClipboardsCount == 0) { |
| unregisterClipboardViewer(); |
| } |
| } |
| } |
| |
| private native void unregisterClipboardViewer(); |
| |
| } |