| /* GtkClipboard.java |
| Copyright (C) 1999, 2005 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., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 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 gnu.java.awt.peer.gtk; |
| |
| import java.awt.datatransfer.Clipboard; |
| import java.awt.datatransfer.ClipboardOwner; |
| import java.awt.datatransfer.DataFlavor; |
| import java.awt.datatransfer.StringSelection; |
| import java.awt.datatransfer.Transferable; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| |
| public class GtkClipboard extends Clipboard |
| { |
| /* the number of milliseconds that we'll wait around for the |
| owner of the GDK_SELECTION_PRIMARY selection to convert |
| the requested data */ |
| static final int SELECTION_RECEIVED_TIMEOUT = 5000; |
| |
| /* We currently only support transferring of text between applications */ |
| static String selection; |
| static Object selectionLock = new Object (); |
| |
| static boolean hasSelection = false; |
| |
| protected GtkClipboard() |
| { |
| super("System Clipboard"); |
| initNativeState(); |
| } |
| |
| public Transferable getContents(Object requestor) |
| { |
| synchronized (this) |
| { |
| if (hasSelection) |
| return contents; |
| } |
| |
| /* Java doesn't own the selection, so we need to ask X11 */ |
| // XXX: Does this hold with Swing too ? |
| synchronized (selectionLock) |
| { |
| requestStringConversion(); |
| |
| try |
| { |
| selectionLock.wait(SELECTION_RECEIVED_TIMEOUT); |
| } |
| catch (InterruptedException e) |
| { |
| return null; |
| } |
| |
| return selection == null ? null : new StringSelection(selection); |
| } |
| } |
| |
| void stringSelectionReceived(String newSelection) |
| { |
| synchronized (selectionLock) |
| { |
| selection = newSelection; |
| selectionLock.notify(); |
| } |
| } |
| |
| /* convert Java clipboard data into a String suitable for sending |
| to another application */ |
| synchronized String stringSelectionHandler() throws IOException |
| { |
| String selection = null; |
| |
| try |
| { |
| if (contents.isDataFlavorSupported(DataFlavor.stringFlavor)) |
| selection = (String)contents.getTransferData(DataFlavor.stringFlavor); |
| else if (contents.isDataFlavorSupported(DataFlavor.plainTextFlavor)) |
| { |
| StringBuffer sbuf = new StringBuffer(); |
| InputStreamReader reader; |
| char readBuf[] = new char[512]; |
| int numChars; |
| |
| reader = new InputStreamReader |
| ((InputStream) |
| contents.getTransferData(DataFlavor.plainTextFlavor), "UNICODE"); |
| |
| while (true) |
| { |
| numChars = reader.read(readBuf); |
| if (numChars == -1) |
| break; |
| sbuf.append(readBuf, 0, numChars); |
| } |
| |
| selection = new String(sbuf); |
| } |
| } |
| catch (Exception e) |
| { |
| } |
| |
| return selection; |
| } |
| |
| public synchronized void setContents(Transferable contents, |
| ClipboardOwner owner) |
| { |
| selectionGet(); |
| |
| this.contents = contents; |
| this.owner = owner; |
| |
| hasSelection = true; |
| } |
| |
| synchronized void selectionClear() |
| { |
| hasSelection = false; |
| |
| if (owner != null) |
| { |
| owner.lostOwnership(this, contents); |
| owner = null; |
| contents = null; |
| } |
| } |
| |
| native void initNativeState(); |
| static native void requestStringConversion(); |
| static native void selectionGet(); |
| } |