/*
 * Copyright (c) 2014, 2017, 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 com.sun.javafx.embed.swing;

import com.sun.javafx.tk.Toolkit;
import java.awt.Component;
import java.awt.Cursor;
import java.awt.Point;
import java.awt.SecondaryLoop;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureEvent;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragGestureRecognizer;
import java.awt.dnd.DragSource;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetContext;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetListener;
import java.awt.dnd.InvalidDnDOperationException;
import java.awt.dnd.MouseDragGestureRecognizer;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.HashMap;
import java.util.Map;
import javafx.application.Platform;
import javafx.event.EventHandler;
import javafx.event.EventType;
import javafx.scene.input.DataFormat;
import javafx.scene.input.DragEvent;
import javafx.scene.input.Dragboard;
import javafx.scene.input.MouseEvent;
import javafx.scene.input.TransferMode;

import javafx.embed.swing.SwingNode;

/**
 * A utility class to connect DnD mechanism of Swing and FX.
 * It allows Swing content to use the FX machinery for performing DnD.
 */
final public class FXDnD {
    private static SwingNode node;
    public static boolean fxAppThreadIsDispatchThread;
    private SwingNode getNode() { return node; }
    private static FXDnDInterop fxdndiop;

    static {
        AccessController.doPrivileged(new PrivilegedAction<Object>() {
            public Object run() {
                fxAppThreadIsDispatchThread =
                        "true".equals(System.getProperty("javafx.embed.singleThread"));
                return null;
            }
        });

	InteropFactory instance = null;
	try {
	    instance = InteropFactory.getInstance();
	} catch (Exception e) {
            throw new ExceptionInInitializerError(e);
	}
        fxdndiop = instance.createFXDnDImpl();
    }

    public FXDnD(SwingNode node) {
        this.node = node;
	fxdndiop.setNode(node);
    }

    public Object createDragSourceContext(DragGestureEvent dge) 
		    throws InvalidDnDOperationException {
        return fxdndiop.createDragSourceContext(dge);
    }

    public <T extends DragGestureRecognizer> T createDragGestureRecognizer(
            Class<T> abstractRecognizerClass,
            DragSource ds, Component c, int srcActions,
            DragGestureListener dgl)
    {
        return fxdndiop.createDragGestureRecognizer(ds, c, srcActions, dgl);
    }

    public void addDropTarget(DropTarget dt) {
	fxdndiop.addDropTarget(dt, node);
    }

    public void removeDropTarget(DropTarget dt) {
        fxdndiop.removeDropTarget(dt, node);
    }
}