1 /*
   2  * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.lwawt.macosx;
  27 
  28 import java.awt.*;
  29 import java.awt.datatransfer.*;
  30 import java.io.IOException;
  31 import java.io.NotSerializableException;
  32 import java.util.*;
  33 
  34 import sun.awt.datatransfer.*;
  35 
  36 
  37 /**
  38 * A class which interfaces with Cocoa's pasteboard in order to support
  39  * data transfer via Clipboard operations. Most of the work is provided by
  40  * sun.awt.datatransfer.DataTransferer.
  41  */
  42 
  43 final class CClipboard extends SunClipboard {
  44 
  45     public CClipboard(String name) {
  46         super(name);
  47     }
  48 
  49     @Override
  50     public long getID() {
  51         return 0;
  52     }
  53 
  54     @Override
  55     protected void clearNativeContext() {
  56         // Leaving Empty, as WClipboard.clearNativeContext is empty as well.
  57     }
  58 
  59     @Override
  60     public synchronized Transferable getContents(Object requestor) {
  61         checkPasteboardAndNotify();
  62         return super.getContents(requestor);
  63     }
  64 
  65     @Override
  66     protected synchronized Transferable getContextContents() {
  67         checkPasteboardAndNotify();
  68         return super.getContextContents();
  69     }
  70 
  71     @Override
  72     protected void setContentsNative(Transferable contents) {
  73         FlavorTable flavorMap = getDefaultFlavorTable();
  74         // Don't use delayed Clipboard rendering for the Transferable's data.
  75         // If we did that, we would call Transferable.getTransferData on
  76         // the Toolkit thread, which is a security hole.
  77         //
  78         // Get all of the target formats into which the Transferable can be
  79         // translated. Then, for each format, translate the data and post
  80         // it to the Clipboard.
  81         DataTransferer dataTransferer = DataTransferer.getInstance();
  82         long[] formatArray = dataTransferer.getFormatsForTransferableAsArray(contents, flavorMap);
  83         declareTypes(formatArray, this);
  84 
  85         Map<Long, DataFlavor> formatMap = dataTransferer.getFormatsForTransferable(contents, flavorMap);
  86         for (Map.Entry<Long, DataFlavor> entry : formatMap.entrySet()) {
  87             long format = entry.getKey();
  88             DataFlavor flavor = entry.getValue();
  89 
  90             try {
  91                 byte[] bytes = DataTransferer.getInstance().translateTransferable(contents, flavor, format);
  92                 setData(bytes, format);
  93             } catch (IOException e) {
  94                 // Fix 4696186: don't print exception if data with
  95                 // javaJVMLocalObjectMimeType failed to serialize.
  96                 // May remove this if-check when 5078787 is fixed.
  97                 if (!(flavor.isMimeTypeEqual(DataFlavor.javaJVMLocalObjectMimeType) &&
  98                         e instanceof NotSerializableException)) {
  99                     e.printStackTrace();
 100                 }
 101             }
 102         }
 103 
 104         notifyChanged();
 105     }
 106 
 107     @Override
 108     protected native long[] getClipboardFormats();
 109     @Override
 110     protected native byte[] getClipboardData(long format) throws IOException;
 111 
 112     // 1.5 peer method
 113     @Override
 114     protected void unregisterClipboardViewerChecked() {
 115         // no-op because we lack OS support. This requires 4048791, which requires 4048792
 116     }
 117 
 118     // 1.5 peer method
 119     @Override
 120     protected void registerClipboardViewerChecked()    {
 121         // no-op because we lack OS support. This requires 4048791, which requires 4048792
 122     }
 123 
 124     // 1.5 peer method
 125     // no-op. This appears to be win32 specific. Filed 4048790 for investigation
 126     //protected Transferable createLocaleTransferable(long[] formats) throws IOException;
 127 
 128     private native void declareTypes(long[] formats, SunClipboard newOwner);
 129     private native void setData(byte[] data, long format);
 130 
 131     void checkPasteboardAndNotify() {
 132         if (checkPasteboardWithoutNotification()) {
 133             notifyChanged();
 134             lostOwnershipNow(null);
 135         }
 136     }
 137 
 138     /**
 139      * Invokes native check whether a change count on the general pasteboard is different
 140      * than when we set it. The different count value means the current owner lost
 141      * pasteboard ownership and someone else put data on the clipboard.
 142      * @since 1.7
 143      */
 144     native boolean checkPasteboardWithoutNotification();
 145 
 146     /*** Native Callbacks ***/
 147     private void notifyLostOwnership() {
 148         lostOwnershipImpl();
 149     }
 150 
 151     private static void notifyChanged() {
 152         CClipboard clipboard = (CClipboard) Toolkit.getDefaultToolkit().getSystemClipboard();
 153         if (!clipboard.areFlavorListenersRegistered()) {
 154             return;
 155         }
 156         clipboard.checkChange(clipboard.getClipboardFormats());
 157     }
 158 }