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/*
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* Copyright 2000-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package sun.awt.dnd;
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import java.awt.Component;
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import java.awt.Point;
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import java.awt.datatransfer.DataFlavor;
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import java.awt.datatransfer.Transferable;
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import java.awt.datatransfer.UnsupportedFlavorException;
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import java.awt.dnd.DnDConstants;
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import java.awt.dnd.DropTarget;
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import java.awt.dnd.DropTargetContext;
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import java.awt.dnd.DropTargetListener;
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import java.awt.dnd.DropTargetEvent;
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import java.awt.dnd.DropTargetDragEvent;
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import java.awt.dnd.DropTargetDropEvent;
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import java.awt.dnd.InvalidDnDOperationException;
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import java.awt.dnd.peer.DropTargetContextPeer;
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import java.util.HashSet;
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import java.util.Map;
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import java.util.Arrays;
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import java.util.logging.*;
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import java.io.IOException;
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import java.io.InputStream;
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import sun.awt.AppContext;
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import sun.awt.SunToolkit;
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import sun.awt.datatransfer.DataTransferer;
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import sun.awt.datatransfer.ToolkitThreadBlockedHandler;
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/**
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* <p>
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* The SunDropTargetContextPeer class is the generic class responsible for handling
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* the interaction between a windowing systems DnD system and Java.
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* </p>
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*
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* @since JDK1.3.1
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*
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*/
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public abstract class SunDropTargetContextPeer implements DropTargetContextPeer, Transferable {
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/*
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* A boolean constant that requires the peer to wait until the
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* SunDropTargetEvent is processed and return the status back
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* to the native code.
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*/
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public static final boolean DISPATCH_SYNC = true;
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private DropTarget currentDT;
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private DropTargetContext currentDTC;
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private long[] currentT;
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private int currentA; // target actions
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private int currentSA; // source actions
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private int currentDA; // current drop action
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private int previousDA;
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private long nativeDragContext;
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private Transferable local;
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private boolean dragRejected = false;
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protected int dropStatus = STATUS_NONE;
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protected boolean dropComplete = false;
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/*
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* global lock
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*/
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protected static final Object _globalLock = new Object();
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private static final Logger dndLog = Logger.getLogger("sun.awt.dnd.SunDropTargetContextPeer");
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/*
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* a primitive mechanism for advertising intra-JVM Transferables
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*/
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protected static Transferable currentJVMLocalSourceTransferable = null;
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public static void setCurrentJVMLocalSourceTransferable(Transferable t) throws InvalidDnDOperationException {
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synchronized(_globalLock) {
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if (t != null && currentJVMLocalSourceTransferable != null) {
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throw new InvalidDnDOperationException();
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} else {
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currentJVMLocalSourceTransferable = t;
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}
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}
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}
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/**
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* obtain the transferable iff the operation is in the same VM
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*/
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private static Transferable getJVMLocalSourceTransferable() {
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return currentJVMLocalSourceTransferable;
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}
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/*
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* constants used by dropAccept() or dropReject()
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*/
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protected final static int STATUS_NONE = 0; // none pending
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protected final static int STATUS_WAIT = 1; // drop pending
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protected final static int STATUS_ACCEPT = 2;
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protected final static int STATUS_REJECT = -1;
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/**
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* create the peer
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*/
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public SunDropTargetContextPeer() {
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super();
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}
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/**
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* @return the DropTarget associated with this peer
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*/
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public DropTarget getDropTarget() { return currentDT; }
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/**
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* @param actions set the current actions
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*/
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public synchronized void setTargetActions(int actions) {
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currentA = actions &
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(DnDConstants.ACTION_COPY_OR_MOVE | DnDConstants.ACTION_LINK);
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}
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/**
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* @return the current target actions
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*/
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public int getTargetActions() {
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return currentA;
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}
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/**
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* get the Transferable associated with the drop
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*/
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public Transferable getTransferable() {
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return this;
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}
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/**
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* @return current DataFlavors available
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*/
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// NOTE: This method may be called by privileged threads.
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// DO NOT INVOKE CLIENT CODE ON THIS THREAD!
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public DataFlavor[] getTransferDataFlavors() {
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final Transferable localTransferable = local;
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if (localTransferable != null) {
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return localTransferable.getTransferDataFlavors();
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} else {
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return DataTransferer.getInstance().getFlavorsForFormatsAsArray
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(currentT, DataTransferer.adaptFlavorMap
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(currentDT.getFlavorMap()));
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}
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}
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/**
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* @return if the flavor is supported
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*/
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public boolean isDataFlavorSupported(DataFlavor df) {
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Transferable localTransferable = local;
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if (localTransferable != null) {
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return localTransferable.isDataFlavorSupported(df);
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} else {
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return DataTransferer.getInstance().getFlavorsForFormats
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(currentT, DataTransferer.adaptFlavorMap
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(currentDT.getFlavorMap())).
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containsKey(df);
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}
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}
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/**
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* @return the data
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*/
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public Object getTransferData(DataFlavor df)
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throws UnsupportedFlavorException, IOException,
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InvalidDnDOperationException
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{
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Long lFormat = null;
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Transferable localTransferable = local;
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if (localTransferable != null) {
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return localTransferable.getTransferData(df);
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}
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if (dropStatus != STATUS_ACCEPT || dropComplete) {
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throw new InvalidDnDOperationException("No drop current");
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}
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Map flavorMap = DataTransferer.getInstance().getFlavorsForFormats
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(currentT, DataTransferer.adaptFlavorMap
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(currentDT.getFlavorMap()));
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lFormat = (Long)flavorMap.get(df);
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if (lFormat == null) {
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throw new UnsupportedFlavorException(df);
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}
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if (df.isRepresentationClassRemote() &&
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currentDA != DnDConstants.ACTION_LINK) {
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throw new InvalidDnDOperationException("only ACTION_LINK is permissable for transfer of java.rmi.Remote objects");
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}
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final long format = lFormat.longValue();
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Object ret = getNativeData(format);
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if (ret instanceof byte[]) {
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try {
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return DataTransferer.getInstance().
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translateBytes((byte[])ret, df, format, this);
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} catch (IOException e) {
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throw new InvalidDnDOperationException(e.getMessage());
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}
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} else if (ret instanceof InputStream) {
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try {
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return DataTransferer.getInstance().
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translateStream((InputStream)ret, df, format, this);
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} catch (IOException e) {
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throw new InvalidDnDOperationException(e.getMessage());
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}
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} else {
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throw new IOException("no native data was transfered");
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}
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}
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protected abstract Object getNativeData(long format)
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throws IOException;
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/**
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* @return if the transfer is a local one
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*/
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public boolean isTransferableJVMLocal() {
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return local != null || getJVMLocalSourceTransferable() != null;
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}
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private int handleEnterMessage(final Component component,
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final int x, final int y,
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final int dropAction,
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final int actions, final long[] formats,
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final long nativeCtxt) {
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return postDropTargetEvent(component, x, y, dropAction, actions,
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formats, nativeCtxt,
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SunDropTargetEvent.MOUSE_ENTERED,
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SunDropTargetContextPeer.DISPATCH_SYNC);
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}
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/**
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* actual processing on EventQueue Thread
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*/
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protected void processEnterMessage(SunDropTargetEvent event) {
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Component c = (Component)event.getSource();
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DropTarget dt = c.getDropTarget();
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Point hots = event.getPoint();
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local = getJVMLocalSourceTransferable();
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if (currentDTC != null) { // some wreckage from last time
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currentDTC.removeNotify();
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currentDTC = null;
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}
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if (c.isShowing() && dt != null && dt.isActive()) {
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currentDT = dt;
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currentDTC = currentDT.getDropTargetContext();
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currentDTC.addNotify(this);
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currentA = dt.getDefaultActions();
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try {
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((DropTargetListener)dt).dragEnter(new DropTargetDragEvent(currentDTC,
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hots,
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currentDA,
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currentSA));
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} catch (Exception e) {
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e.printStackTrace();
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currentDA = DnDConstants.ACTION_NONE;
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}
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} else {
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currentDT = null;
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currentDTC = null;
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currentDA = DnDConstants.ACTION_NONE;
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currentSA = DnDConstants.ACTION_NONE;
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currentA = DnDConstants.ACTION_NONE;
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}
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}
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/**
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* upcall to handle exit messages
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*/
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private void handleExitMessage(final Component component,
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final long nativeCtxt) {
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/*
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* Even though the return value is irrelevant for this event, it is
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* dispatched synchronously to fix 4393148 properly.
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*/
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postDropTargetEvent(component, 0, 0, DnDConstants.ACTION_NONE,
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DnDConstants.ACTION_NONE, null, nativeCtxt,
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SunDropTargetEvent.MOUSE_EXITED,
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SunDropTargetContextPeer.DISPATCH_SYNC);
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}
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/**
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*
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*/
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protected void processExitMessage(SunDropTargetEvent event) {
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Component c = (Component)event.getSource();
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DropTarget dt = c.getDropTarget();
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DropTargetContext dtc = null;
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if (dt == null) {
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currentDT = null;
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currentT = null;
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if (currentDTC != null) {
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currentDTC.removeNotify();
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}
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currentDTC = null;
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return;
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}
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if (dt != currentDT) {
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if (currentDTC != null) {
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currentDTC.removeNotify();
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}
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currentDT = dt;
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currentDTC = dt.getDropTargetContext();
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currentDTC.addNotify(this);
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}
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dtc = currentDTC;
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if (dt.isActive()) try {
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((DropTargetListener)dt).dragExit(new DropTargetEvent(dtc));
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} catch (Exception e) {
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e.printStackTrace();
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} finally {
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currentA = DnDConstants.ACTION_NONE;
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currentSA = DnDConstants.ACTION_NONE;
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currentDA = DnDConstants.ACTION_NONE;
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currentDT = null;
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currentT = null;
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currentDTC.removeNotify();
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currentDTC = null;
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local = null;
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dragRejected = false;
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}
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}
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private int handleMotionMessage(final Component component,
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final int x, final int y,
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final int dropAction,
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final int actions, final long[] formats,
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final long nativeCtxt) {
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return postDropTargetEvent(component, x, y, dropAction, actions,
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formats, nativeCtxt,
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SunDropTargetEvent.MOUSE_DRAGGED,
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SunDropTargetContextPeer.DISPATCH_SYNC);
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}
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/**
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414 |
*
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415 |
*/
|
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416 |
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417 |
protected void processMotionMessage(SunDropTargetEvent event,
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418 |
boolean operationChanged) {
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419 |
Component c = (Component)event.getSource();
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420 |
Point hots = event.getPoint();
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int id = event.getID();
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422 |
DropTarget dt = c.getDropTarget();
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DropTargetContext dtc = null;
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425 |
if (c.isShowing() && (dt != null) && dt.isActive()) {
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if (currentDT != dt) {
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427 |
if (currentDTC != null) {
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currentDTC.removeNotify();
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429 |
}
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430 |
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431 |
currentDT = dt;
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432 |
currentDTC = null;
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433 |
}
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434 |
|
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435 |
dtc = currentDT.getDropTargetContext();
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436 |
if (dtc != currentDTC) {
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437 |
if (currentDTC != null) {
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438 |
currentDTC.removeNotify();
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439 |
}
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440 |
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441 |
currentDTC = dtc;
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currentDTC.addNotify(this);
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443 |
}
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|
444 |
|
|
445 |
currentA = currentDT.getDefaultActions();
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446 |
|
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447 |
try {
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448 |
DropTargetDragEvent dtde = new DropTargetDragEvent(dtc,
|
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449 |
hots,
|
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currentDA,
|
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currentSA);
|
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452 |
DropTargetListener dtl = (DropTargetListener)dt;
|
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453 |
if (operationChanged) {
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454 |
dtl.dropActionChanged(dtde);
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455 |
} else {
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456 |
dtl.dragOver(dtde);
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}
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458 |
|
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459 |
if (dragRejected) {
|
|
460 |
currentDA = DnDConstants.ACTION_NONE;
|
|
461 |
}
|
|
462 |
} catch (Exception e) {
|
|
463 |
e.printStackTrace();
|
|
464 |
currentDA = DnDConstants.ACTION_NONE;
|
|
465 |
}
|
|
466 |
} else {
|
|
467 |
currentDA = DnDConstants.ACTION_NONE;
|
|
468 |
}
|
|
469 |
}
|
|
470 |
|
|
471 |
/**
|
|
472 |
* upcall to handle the Drop message
|
|
473 |
*/
|
|
474 |
|
|
475 |
private void handleDropMessage(final Component component,
|
|
476 |
final int x, final int y,
|
|
477 |
final int dropAction, final int actions,
|
|
478 |
final long[] formats,
|
|
479 |
final long nativeCtxt) {
|
|
480 |
postDropTargetEvent(component, x, y, dropAction, actions,
|
|
481 |
formats, nativeCtxt,
|
|
482 |
SunDropTargetEvent.MOUSE_DROPPED,
|
|
483 |
!SunDropTargetContextPeer.DISPATCH_SYNC);
|
|
484 |
}
|
|
485 |
|
|
486 |
/**
|
|
487 |
*
|
|
488 |
*/
|
|
489 |
|
|
490 |
protected void processDropMessage(SunDropTargetEvent event) {
|
|
491 |
Component c = (Component)event.getSource();
|
|
492 |
Point hots = event.getPoint();
|
|
493 |
DropTarget dt = c.getDropTarget();
|
|
494 |
|
|
495 |
dropStatus = STATUS_WAIT; // drop pending ACK
|
|
496 |
dropComplete = false;
|
|
497 |
|
|
498 |
if (c.isShowing() && dt != null && dt.isActive()) {
|
|
499 |
DropTargetContext dtc = dt.getDropTargetContext();
|
|
500 |
|
|
501 |
currentDT = dt;
|
|
502 |
|
|
503 |
if (currentDTC != null) {
|
|
504 |
currentDTC.removeNotify();
|
|
505 |
}
|
|
506 |
|
|
507 |
currentDTC = dtc;
|
|
508 |
currentDTC.addNotify(this);
|
|
509 |
currentA = dt.getDefaultActions();
|
|
510 |
|
|
511 |
synchronized(_globalLock) {
|
|
512 |
if ((local = getJVMLocalSourceTransferable()) != null)
|
|
513 |
setCurrentJVMLocalSourceTransferable(null);
|
|
514 |
}
|
|
515 |
|
|
516 |
try {
|
|
517 |
((DropTargetListener)dt).drop(new DropTargetDropEvent(dtc,
|
|
518 |
hots,
|
|
519 |
currentDA,
|
|
520 |
currentSA,
|
|
521 |
local != null));
|
|
522 |
} finally {
|
|
523 |
if (dropStatus == STATUS_WAIT) {
|
|
524 |
rejectDrop();
|
|
525 |
} else if (dropComplete == false) {
|
|
526 |
dropComplete(false);
|
|
527 |
}
|
|
528 |
}
|
|
529 |
} else {
|
|
530 |
rejectDrop();
|
|
531 |
}
|
|
532 |
}
|
|
533 |
|
|
534 |
protected int postDropTargetEvent(final Component component,
|
|
535 |
final int x, final int y,
|
|
536 |
final int dropAction,
|
|
537 |
final int actions,
|
|
538 |
final long[] formats,
|
|
539 |
final long nativeCtxt,
|
|
540 |
final int eventID,
|
|
541 |
final boolean dispatchType) {
|
|
542 |
AppContext appContext = SunToolkit.targetToAppContext(component);
|
|
543 |
|
|
544 |
EventDispatcher dispatcher =
|
|
545 |
new EventDispatcher(this, dropAction, actions, formats, nativeCtxt,
|
|
546 |
dispatchType);
|
|
547 |
|
|
548 |
SunDropTargetEvent event =
|
|
549 |
new SunDropTargetEvent(component, eventID, x, y, dispatcher);
|
|
550 |
|
|
551 |
if (dispatchType == SunDropTargetContextPeer.DISPATCH_SYNC) {
|
|
552 |
DataTransferer.getInstance().getToolkitThreadBlockedHandler().lock();
|
|
553 |
}
|
|
554 |
|
|
555 |
// schedule callback
|
|
556 |
SunToolkit.postEvent(appContext, event);
|
|
557 |
|
|
558 |
eventPosted(event);
|
|
559 |
|
|
560 |
if (dispatchType == SunDropTargetContextPeer.DISPATCH_SYNC) {
|
|
561 |
while (!dispatcher.isDone()) {
|
|
562 |
DataTransferer.getInstance().getToolkitThreadBlockedHandler().enter();
|
|
563 |
}
|
|
564 |
|
|
565 |
DataTransferer.getInstance().getToolkitThreadBlockedHandler().unlock();
|
|
566 |
|
|
567 |
// return target's response
|
|
568 |
return dispatcher.getReturnValue();
|
|
569 |
} else {
|
|
570 |
return 0;
|
|
571 |
}
|
|
572 |
}
|
|
573 |
|
|
574 |
/**
|
|
575 |
* acceptDrag
|
|
576 |
*/
|
|
577 |
|
|
578 |
public synchronized void acceptDrag(int dragOperation) {
|
|
579 |
if (currentDT == null) {
|
|
580 |
throw new InvalidDnDOperationException("No Drag pending");
|
|
581 |
}
|
|
582 |
currentDA = mapOperation(dragOperation);
|
|
583 |
if (currentDA != DnDConstants.ACTION_NONE) {
|
|
584 |
dragRejected = false;
|
|
585 |
}
|
|
586 |
}
|
|
587 |
|
|
588 |
/**
|
|
589 |
* rejectDrag
|
|
590 |
*/
|
|
591 |
|
|
592 |
public synchronized void rejectDrag() {
|
|
593 |
if (currentDT == null) {
|
|
594 |
throw new InvalidDnDOperationException("No Drag pending");
|
|
595 |
}
|
|
596 |
currentDA = DnDConstants.ACTION_NONE;
|
|
597 |
dragRejected = true;
|
|
598 |
}
|
|
599 |
|
|
600 |
/**
|
|
601 |
* acceptDrop
|
|
602 |
*/
|
|
603 |
|
|
604 |
public synchronized void acceptDrop(int dropOperation) {
|
|
605 |
if (dropOperation == DnDConstants.ACTION_NONE)
|
|
606 |
throw new IllegalArgumentException("invalid acceptDrop() action");
|
|
607 |
|
|
608 |
if (dropStatus != STATUS_WAIT) {
|
|
609 |
throw new InvalidDnDOperationException("invalid acceptDrop()");
|
|
610 |
}
|
|
611 |
|
|
612 |
currentDA = currentA = mapOperation(dropOperation & currentSA);
|
|
613 |
|
|
614 |
dropStatus = STATUS_ACCEPT;
|
|
615 |
dropComplete = false;
|
|
616 |
}
|
|
617 |
|
|
618 |
/**
|
|
619 |
* reject Drop
|
|
620 |
*/
|
|
621 |
|
|
622 |
public synchronized void rejectDrop() {
|
|
623 |
if (dropStatus != STATUS_WAIT) {
|
|
624 |
throw new InvalidDnDOperationException("invalid rejectDrop()");
|
|
625 |
}
|
|
626 |
dropStatus = STATUS_REJECT;
|
|
627 |
/*
|
|
628 |
* Fix for 4285634.
|
|
629 |
* The target rejected the drop means that it doesn't perform any
|
|
630 |
* drop action. This change is to make Solaris behavior consistent
|
|
631 |
* with Win32.
|
|
632 |
*/
|
|
633 |
currentDA = DnDConstants.ACTION_NONE;
|
|
634 |
dropComplete(false);
|
|
635 |
}
|
|
636 |
|
|
637 |
/**
|
|
638 |
* mapOperation
|
|
639 |
*/
|
|
640 |
|
|
641 |
private int mapOperation(int operation) {
|
|
642 |
int[] operations = {
|
|
643 |
DnDConstants.ACTION_MOVE,
|
|
644 |
DnDConstants.ACTION_COPY,
|
|
645 |
DnDConstants.ACTION_LINK,
|
|
646 |
};
|
|
647 |
int ret = DnDConstants.ACTION_NONE;
|
|
648 |
|
|
649 |
for (int i = 0; i < operations.length; i++) {
|
|
650 |
if ((operation & operations[i]) == operations[i]) {
|
|
651 |
ret = operations[i];
|
|
652 |
break;
|
|
653 |
}
|
|
654 |
}
|
|
655 |
|
|
656 |
return ret;
|
|
657 |
}
|
|
658 |
|
|
659 |
/**
|
|
660 |
* signal drop complete
|
|
661 |
*/
|
|
662 |
|
|
663 |
public synchronized void dropComplete(boolean success) {
|
|
664 |
if (dropStatus == STATUS_NONE) {
|
|
665 |
throw new InvalidDnDOperationException("No Drop pending");
|
|
666 |
}
|
|
667 |
|
|
668 |
if (currentDTC != null) currentDTC.removeNotify();
|
|
669 |
|
|
670 |
currentDT = null;
|
|
671 |
currentDTC = null;
|
|
672 |
currentT = null;
|
|
673 |
currentA = DnDConstants.ACTION_NONE;
|
|
674 |
|
|
675 |
synchronized(_globalLock) {
|
|
676 |
currentJVMLocalSourceTransferable = null;
|
|
677 |
}
|
|
678 |
|
|
679 |
dropStatus = STATUS_NONE;
|
|
680 |
dropComplete = true;
|
|
681 |
|
|
682 |
try {
|
|
683 |
doDropDone(success, currentDA, local != null);
|
|
684 |
} finally {
|
|
685 |
currentDA = DnDConstants.ACTION_NONE;
|
|
686 |
// The native context is invalid after the drop is done.
|
|
687 |
// Clear the reference to prohibit access.
|
|
688 |
nativeDragContext = 0;
|
|
689 |
}
|
|
690 |
}
|
|
691 |
|
|
692 |
protected abstract void doDropDone(boolean success,
|
|
693 |
int dropAction, boolean isLocal);
|
|
694 |
|
|
695 |
protected synchronized long getNativeDragContext() {
|
|
696 |
return nativeDragContext;
|
|
697 |
}
|
|
698 |
|
|
699 |
protected void eventPosted(SunDropTargetEvent e) {}
|
|
700 |
|
|
701 |
protected void eventProcessed(SunDropTargetEvent e, int returnValue,
|
|
702 |
boolean dispatcherDone) {}
|
|
703 |
|
|
704 |
protected static class EventDispatcher {
|
|
705 |
|
|
706 |
private final SunDropTargetContextPeer peer;
|
|
707 |
|
|
708 |
// context fields
|
|
709 |
private final int dropAction;
|
|
710 |
private final int actions;
|
|
711 |
private final long[] formats;
|
|
712 |
private long nativeCtxt;
|
|
713 |
private final boolean dispatchType;
|
|
714 |
private boolean dispatcherDone = false;
|
|
715 |
|
|
716 |
// dispatcher state fields
|
|
717 |
private int returnValue = 0;
|
|
718 |
// set of events to be dispatched by this dispatcher
|
|
719 |
private final HashSet eventSet = new HashSet(3);
|
|
720 |
|
|
721 |
static final ToolkitThreadBlockedHandler handler =
|
|
722 |
DataTransferer.getInstance().getToolkitThreadBlockedHandler();
|
|
723 |
|
|
724 |
EventDispatcher(SunDropTargetContextPeer peer,
|
|
725 |
int dropAction,
|
|
726 |
int actions,
|
|
727 |
long[] formats,
|
|
728 |
long nativeCtxt,
|
|
729 |
boolean dispatchType) {
|
|
730 |
|
|
731 |
this.peer = peer;
|
|
732 |
this.nativeCtxt = nativeCtxt;
|
|
733 |
this.dropAction = dropAction;
|
|
734 |
this.actions = actions;
|
|
735 |
this.formats =
|
|
736 |
(null == formats) ? null : Arrays.copyOf(formats, formats.length);
|
|
737 |
this.dispatchType = dispatchType;
|
|
738 |
}
|
|
739 |
|
|
740 |
void dispatchEvent(SunDropTargetEvent e) {
|
|
741 |
int id = e.getID();
|
|
742 |
|
|
743 |
switch (id) {
|
|
744 |
case SunDropTargetEvent.MOUSE_ENTERED:
|
|
745 |
dispatchEnterEvent(e);
|
|
746 |
break;
|
|
747 |
case SunDropTargetEvent.MOUSE_DRAGGED:
|
|
748 |
dispatchMotionEvent(e);
|
|
749 |
break;
|
|
750 |
case SunDropTargetEvent.MOUSE_EXITED:
|
|
751 |
dispatchExitEvent(e);
|
|
752 |
break;
|
|
753 |
case SunDropTargetEvent.MOUSE_DROPPED:
|
|
754 |
dispatchDropEvent(e);
|
|
755 |
break;
|
|
756 |
default:
|
|
757 |
throw new InvalidDnDOperationException();
|
|
758 |
}
|
|
759 |
}
|
|
760 |
|
|
761 |
private void dispatchEnterEvent(SunDropTargetEvent e) {
|
|
762 |
synchronized (peer) {
|
|
763 |
|
|
764 |
// store the drop action here to track operation changes
|
|
765 |
peer.previousDA = dropAction;
|
|
766 |
|
|
767 |
// setup peer context
|
|
768 |
peer.nativeDragContext = nativeCtxt;
|
|
769 |
peer.currentT = formats;
|
|
770 |
peer.currentSA = actions;
|
|
771 |
peer.currentDA = dropAction;
|
|
772 |
// To allow data retrieval.
|
|
773 |
peer.dropStatus = STATUS_ACCEPT;
|
|
774 |
peer.dropComplete = false;
|
|
775 |
|
|
776 |
try {
|
|
777 |
peer.processEnterMessage(e);
|
|
778 |
} finally {
|
|
779 |
peer.dropStatus = STATUS_NONE;
|
|
780 |
}
|
|
781 |
|
|
782 |
setReturnValue(peer.currentDA);
|
|
783 |
}
|
|
784 |
}
|
|
785 |
|
|
786 |
private void dispatchMotionEvent(SunDropTargetEvent e) {
|
|
787 |
synchronized (peer) {
|
|
788 |
|
|
789 |
boolean operationChanged = peer.previousDA != dropAction;
|
|
790 |
peer.previousDA = dropAction;
|
|
791 |
|
|
792 |
// setup peer context
|
|
793 |
peer.nativeDragContext = nativeCtxt;
|
|
794 |
peer.currentT = formats;
|
|
795 |
peer.currentSA = actions;
|
|
796 |
peer.currentDA = dropAction;
|
|
797 |
// To allow data retrieval.
|
|
798 |
peer.dropStatus = STATUS_ACCEPT;
|
|
799 |
peer.dropComplete = false;
|
|
800 |
|
|
801 |
try {
|
|
802 |
peer.processMotionMessage(e, operationChanged);
|
|
803 |
} finally {
|
|
804 |
peer.dropStatus = STATUS_NONE;
|
|
805 |
}
|
|
806 |
|
|
807 |
setReturnValue(peer.currentDA);
|
|
808 |
}
|
|
809 |
}
|
|
810 |
|
|
811 |
private void dispatchExitEvent(SunDropTargetEvent e) {
|
|
812 |
synchronized (peer) {
|
|
813 |
|
|
814 |
// setup peer context
|
|
815 |
peer.nativeDragContext = nativeCtxt;
|
|
816 |
|
|
817 |
peer.processExitMessage(e);
|
|
818 |
}
|
|
819 |
}
|
|
820 |
|
|
821 |
private void dispatchDropEvent(SunDropTargetEvent e) {
|
|
822 |
synchronized (peer) {
|
|
823 |
|
|
824 |
// setup peer context
|
|
825 |
peer.nativeDragContext = nativeCtxt;
|
|
826 |
peer.currentT = formats;
|
|
827 |
peer.currentSA = actions;
|
|
828 |
peer.currentDA = dropAction;
|
|
829 |
|
|
830 |
peer.processDropMessage(e);
|
|
831 |
}
|
|
832 |
}
|
|
833 |
|
|
834 |
void setReturnValue(int ret) {
|
|
835 |
returnValue = ret;
|
|
836 |
}
|
|
837 |
|
|
838 |
int getReturnValue() {
|
|
839 |
return returnValue;
|
|
840 |
}
|
|
841 |
|
|
842 |
boolean isDone() {
|
|
843 |
return eventSet.isEmpty();
|
|
844 |
}
|
|
845 |
|
|
846 |
void registerEvent(SunDropTargetEvent e) {
|
|
847 |
handler.lock();
|
|
848 |
if (!eventSet.add(e) && dndLog.isLoggable(Level.FINE)) {
|
|
849 |
dndLog.log(Level.FINE, "Event is already registered: " + e);
|
|
850 |
}
|
|
851 |
handler.unlock();
|
|
852 |
}
|
|
853 |
|
|
854 |
void unregisterEvent(SunDropTargetEvent e) {
|
|
855 |
handler.lock();
|
|
856 |
try {
|
|
857 |
if (!eventSet.remove(e)) {
|
|
858 |
// This event has already been unregistered.
|
|
859 |
return;
|
|
860 |
}
|
|
861 |
if (eventSet.isEmpty()) {
|
|
862 |
if (!dispatcherDone && dispatchType == DISPATCH_SYNC) {
|
|
863 |
handler.exit();
|
|
864 |
}
|
|
865 |
dispatcherDone = true;
|
|
866 |
}
|
|
867 |
} finally {
|
|
868 |
handler.unlock();
|
|
869 |
}
|
|
870 |
|
|
871 |
try {
|
|
872 |
peer.eventProcessed(e, returnValue, dispatcherDone);
|
|
873 |
} finally {
|
|
874 |
/*
|
|
875 |
* Clear the reference to the native context if all copies of
|
|
876 |
* the original event are processed.
|
|
877 |
*/
|
|
878 |
if (dispatcherDone) {
|
|
879 |
nativeCtxt = 0;
|
|
880 |
// Fix for 6342381
|
|
881 |
peer.nativeDragContext = 0;
|
|
882 |
|
|
883 |
}
|
|
884 |
}
|
|
885 |
}
|
|
886 |
|
|
887 |
public void unregisterAllEvents() {
|
|
888 |
Object[] events = null;
|
|
889 |
handler.lock();
|
|
890 |
try {
|
|
891 |
events = eventSet.toArray();
|
|
892 |
} finally {
|
|
893 |
handler.unlock();
|
|
894 |
}
|
|
895 |
|
|
896 |
if (events != null) {
|
|
897 |
for (int i = 0; i < events.length; i++) {
|
|
898 |
unregisterEvent((SunDropTargetEvent)events[i]);
|
|
899 |
}
|
|
900 |
}
|
|
901 |
}
|
|
902 |
}
|
|
903 |
}
|