/*
 * Copyright (c) 2011, 2014, Oracle and/or its affiliates. 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.lwawt.macosx;

import java.awt.*;
import java.awt.datatransfer.*;
import java.io.IOException;
import java.io.NotSerializableException;
import java.util.*;

import sun.awt.datatransfer.*;


A class which interfaces with Cocoa's pasteboard in order to support
data transfer via Clipboard operations. Most of the work is provided by
sun.awt.datatransfer.DataTransferer.
/**
* A class which interfaces with Cocoa's pasteboard in order to support
 * data transfer via Clipboard operations. Most of the work is provided by
 * sun.awt.datatransfer.DataTransferer.
 */

final class CClipboard extends SunClipboard {

    public CClipboard(String name) {
        super(name);
    }

    @Override
    public long getID() {
        return 0;
    }

    @Override
    protected void clearNativeContext() {
        // Leaving Empty, as WClipboard.clearNativeContext is empty as well.
    }

    @Override
    public synchronized Transferable getContents(Object requestor) {
        checkPasteboardAndNotify();
        return super.getContents(requestor);
    }

    @Override
    protected synchronized Transferable getContextContents() {
        checkPasteboardAndNotify();
        return super.getContextContents();
    }

    @Override
    protected void setContentsNative(Transferable contents) {
        FlavorTable flavorMap = getDefaultFlavorTable();
        // Don't use delayed Clipboard rendering for the Transferable's data.
        // If we did that, we would call Transferable.getTransferData on
        // the Toolkit thread, which is a security hole.
        //
        // Get all of the target formats into which the Transferable can be
        // translated. Then, for each format, translate the data and post
        // it to the Clipboard.
        DataTransferer dataTransferer = DataTransferer.getInstance();
        long[] formatArray = dataTransferer.getFormatsForTransferableAsArray(contents, flavorMap);
        declareTypes(formatArray, this);

        Map<Long, DataFlavor> formatMap = dataTransferer.getFormatsForTransferable(contents, flavorMap);
        for (Map.Entry<Long, DataFlavor> entry : formatMap.entrySet()) {
            long format = entry.getKey();
            DataFlavor flavor = entry.getValue();

            try {
                byte[] bytes = DataTransferer.getInstance().translateTransferable(contents, flavor, format);
                setData(bytes, format);
            } catch (IOException e) {
                // Fix 4696186: don't print exception if data with
                // javaJVMLocalObjectMimeType failed to serialize.
                // May remove this if-check when 5078787 is fixed.
                if (!(flavor.isMimeTypeEqual(DataFlavor.javaJVMLocalObjectMimeType) &&
                        e instanceof NotSerializableException)) {
                    e.printStackTrace();
                }
            }
        }

        notifyChanged();
    }

    @Override
    protected native long[] getClipboardFormats();
    @Override
    protected native byte[] getClipboardData(long format) throws IOException;

    // 1.5 peer method
    @Override
    protected void unregisterClipboardViewerChecked() {
        // no-op because we lack OS support. This requires 4048791, which requires 4048792
    }

    // 1.5 peer method
    @Override
    protected void registerClipboardViewerChecked()    {
        // no-op because we lack OS support. This requires 4048791, which requires 4048792
    }

    // 1.5 peer method
    // no-op. This appears to be win32 specific. Filed 4048790 for investigation
    //protected Transferable createLocaleTransferable(long[] formats) throws IOException;

    private native void declareTypes(long[] formats, SunClipboard newOwner);
    private native void setData(byte[] data, long format);

    void checkPasteboardAndNotify() {
        if (checkPasteboardWithoutNotification()) {
            notifyChanged();
            lostOwnershipNow(null);
        }
    }

    
Invokes native check whether a change count on the general pasteboard is different
than when we set it. The different count value means the current owner lost
pasteboard ownership and someone else put data on the clipboard.
Since:
1.7/**
     * Invokes native check whether a change count on the general pasteboard is different
     * than when we set it. The different count value means the current owner lost
     * pasteboard ownership and someone else put data on the clipboard.
     * @since 1.7
     */
    native boolean checkPasteboardWithoutNotification();

    
Native Callbacks /*** Native Callbacks ***/
    private void notifyLostOwnership() {
        lostOwnershipImpl();
    }

    private static void notifyChanged() {
        CClipboard clipboard = (CClipboard) Toolkit.getDefaultToolkit().getSystemClipboard();
        if (!clipboard.areFlavorListenersRegistered()) {
            return;
        }
        clipboard.checkChange(clipboard.getClipboardFormats());
    }
}