| /* |
| * Copyright (c) 2000, 2013, 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.awt.dnd; |
| |
| import java.awt.Component; |
| import java.awt.Point; |
| |
| import java.awt.datatransfer.DataFlavor; |
| import java.awt.datatransfer.Transferable; |
| import java.awt.datatransfer.UnsupportedFlavorException; |
| |
| import java.awt.dnd.DnDConstants; |
| |
| import java.awt.dnd.DropTarget; |
| import java.awt.dnd.DropTargetContext; |
| import java.awt.dnd.DropTargetListener; |
| import java.awt.dnd.DropTargetEvent; |
| import java.awt.dnd.DropTargetDragEvent; |
| import java.awt.dnd.DropTargetDropEvent; |
| import java.awt.dnd.InvalidDnDOperationException; |
| |
| import java.awt.dnd.peer.DropTargetContextPeer; |
| |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Arrays; |
| |
| import sun.util.logging.PlatformLogger; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import sun.awt.AppContext; |
| import sun.awt.AWTPermissions; |
| import sun.awt.SunToolkit; |
| import sun.awt.datatransfer.DataTransferer; |
| import sun.awt.datatransfer.ToolkitThreadBlockedHandler; |
| |
| /** |
| * <p> |
| * The SunDropTargetContextPeer class is the generic class responsible for handling |
| * the interaction between a windowing systems DnD system and Java. |
| * </p> |
| * |
| * @since JDK1.3.1 |
| * |
| */ |
| |
| public abstract class SunDropTargetContextPeer implements DropTargetContextPeer, Transferable { |
| |
| /* |
| * A boolean constant that requires the peer to wait until the |
| * SunDropTargetEvent is processed and return the status back |
| * to the native code. |
| */ |
| public static final boolean DISPATCH_SYNC = true; |
| private DropTarget currentDT; |
| private DropTargetContext currentDTC; |
| private long[] currentT; |
| private int currentA; // target actions |
| private int currentSA; // source actions |
| private int currentDA; // current drop action |
| private int previousDA; |
| |
| private long nativeDragContext; |
| |
| private Transferable local; |
| |
| private boolean dragRejected = false; |
| |
| protected int dropStatus = STATUS_NONE; |
| protected boolean dropComplete = false; |
| |
| // The flag is used to monitor whether the drop action is |
| // handled by a user. That allows to distinct during |
| // which operation getTransferData() method is invoked. |
| boolean dropInProcess = false; |
| |
| /* |
| * global lock |
| */ |
| |
| protected static final Object _globalLock = new Object(); |
| |
| private static final PlatformLogger dndLog = PlatformLogger.getLogger("sun.awt.dnd.SunDropTargetContextPeer"); |
| |
| /* |
| * a primitive mechanism for advertising intra-JVM Transferables |
| */ |
| |
| protected static Transferable currentJVMLocalSourceTransferable = null; |
| |
| public static void setCurrentJVMLocalSourceTransferable(Transferable t) throws InvalidDnDOperationException { |
| synchronized(_globalLock) { |
| if (t != null && currentJVMLocalSourceTransferable != null) { |
| throw new InvalidDnDOperationException(); |
| } else { |
| currentJVMLocalSourceTransferable = t; |
| } |
| } |
| } |
| |
| /** |
| * obtain the transferable iff the operation is in the same VM |
| */ |
| |
| private static Transferable getJVMLocalSourceTransferable() { |
| return currentJVMLocalSourceTransferable; |
| } |
| |
| /* |
| * constants used by dropAccept() or dropReject() |
| */ |
| |
| protected final static int STATUS_NONE = 0; // none pending |
| protected final static int STATUS_WAIT = 1; // drop pending |
| protected final static int STATUS_ACCEPT = 2; |
| protected final static int STATUS_REJECT = -1; |
| |
| /** |
| * create the peer |
| */ |
| |
| public SunDropTargetContextPeer() { |
| super(); |
| } |
| |
| /** |
| * @return the DropTarget associated with this peer |
| */ |
| |
| public DropTarget getDropTarget() { return currentDT; } |
| |
| /** |
| * @param actions set the current actions |
| */ |
| |
| public synchronized void setTargetActions(int actions) { |
| currentA = actions & |
| (DnDConstants.ACTION_COPY_OR_MOVE | DnDConstants.ACTION_LINK); |
| } |
| |
| /** |
| * @return the current target actions |
| */ |
| |
| public int getTargetActions() { |
| return currentA; |
| } |
| |
| /** |
| * get the Transferable associated with the drop |
| */ |
| |
| public Transferable getTransferable() { |
| return this; |
| } |
| |
| /** |
| * @return current DataFlavors available |
| */ |
| // NOTE: This method may be called by privileged threads. |
| // DO NOT INVOKE CLIENT CODE ON THIS THREAD! |
| |
| public DataFlavor[] getTransferDataFlavors() { |
| final Transferable localTransferable = local; |
| |
| if (localTransferable != null) { |
| return localTransferable.getTransferDataFlavors(); |
| } else { |
| return DataTransferer.getInstance().getFlavorsForFormatsAsArray |
| (currentT, DataTransferer.adaptFlavorMap |
| (currentDT.getFlavorMap())); |
| } |
| } |
| |
| /** |
| * @return if the flavor is supported |
| */ |
| |
| public boolean isDataFlavorSupported(DataFlavor df) { |
| Transferable localTransferable = local; |
| |
| if (localTransferable != null) { |
| return localTransferable.isDataFlavorSupported(df); |
| } else { |
| return DataTransferer.getInstance().getFlavorsForFormats |
| (currentT, DataTransferer.adaptFlavorMap |
| (currentDT.getFlavorMap())). |
| containsKey(df); |
| } |
| } |
| |
| /** |
| * @return the data |
| */ |
| |
| public Object getTransferData(DataFlavor df) |
| throws UnsupportedFlavorException, IOException, |
| InvalidDnDOperationException |
| { |
| |
| SecurityManager sm = System.getSecurityManager(); |
| try { |
| if (!dropInProcess && sm != null) { |
| sm.checkPermission(AWTPermissions.ACCESS_CLIPBOARD_PERMISSION); |
| } |
| } catch (Exception e) { |
| Thread currentThread = Thread.currentThread(); |
| currentThread.getUncaughtExceptionHandler().uncaughtException(currentThread, e); |
| return null; |
| } |
| |
| Long lFormat = null; |
| Transferable localTransferable = local; |
| |
| if (localTransferable != null) { |
| return localTransferable.getTransferData(df); |
| } |
| |
| if (dropStatus != STATUS_ACCEPT || dropComplete) { |
| throw new InvalidDnDOperationException("No drop current"); |
| } |
| |
| Map flavorMap = DataTransferer.getInstance().getFlavorsForFormats |
| (currentT, DataTransferer.adaptFlavorMap |
| (currentDT.getFlavorMap())); |
| |
| lFormat = (Long)flavorMap.get(df); |
| if (lFormat == null) { |
| throw new UnsupportedFlavorException(df); |
| } |
| |
| if (df.isRepresentationClassRemote() && |
| currentDA != DnDConstants.ACTION_LINK) { |
| throw new InvalidDnDOperationException("only ACTION_LINK is permissable for transfer of java.rmi.Remote objects"); |
| } |
| |
| final long format = lFormat.longValue(); |
| |
| Object ret = getNativeData(format); |
| |
| if (ret instanceof byte[]) { |
| try { |
| return DataTransferer.getInstance(). |
| translateBytes((byte[])ret, df, format, this); |
| } catch (IOException e) { |
| throw new InvalidDnDOperationException(e.getMessage()); |
| } |
| } else if (ret instanceof InputStream) { |
| try { |
| return DataTransferer.getInstance(). |
| translateStream((InputStream)ret, df, format, this); |
| } catch (IOException e) { |
| throw new InvalidDnDOperationException(e.getMessage()); |
| } |
| } else { |
| throw new IOException("no native data was transfered"); |
| } |
| } |
| |
| protected abstract Object getNativeData(long format) |
| throws IOException; |
| |
| /** |
| * @return if the transfer is a local one |
| */ |
| public boolean isTransferableJVMLocal() { |
| return local != null || getJVMLocalSourceTransferable() != null; |
| } |
| |
| private int handleEnterMessage(final Component component, |
| final int x, final int y, |
| final int dropAction, |
| final int actions, final long[] formats, |
| final long nativeCtxt) { |
| return postDropTargetEvent(component, x, y, dropAction, actions, |
| formats, nativeCtxt, |
| SunDropTargetEvent.MOUSE_ENTERED, |
| SunDropTargetContextPeer.DISPATCH_SYNC); |
| } |
| |
| /** |
| * actual processing on EventQueue Thread |
| */ |
| |
| protected void processEnterMessage(SunDropTargetEvent event) { |
| Component c = (Component)event.getSource(); |
| DropTarget dt = c.getDropTarget(); |
| Point hots = event.getPoint(); |
| |
| local = getJVMLocalSourceTransferable(); |
| |
| if (currentDTC != null) { // some wreckage from last time |
| currentDTC.removeNotify(); |
| currentDTC = null; |
| } |
| |
| if (c.isShowing() && dt != null && dt.isActive()) { |
| currentDT = dt; |
| currentDTC = currentDT.getDropTargetContext(); |
| |
| currentDTC.addNotify(this); |
| |
| currentA = dt.getDefaultActions(); |
| |
| try { |
| ((DropTargetListener)dt).dragEnter(new DropTargetDragEvent(currentDTC, |
| hots, |
| currentDA, |
| currentSA)); |
| } catch (Exception e) { |
| e.printStackTrace(); |
| currentDA = DnDConstants.ACTION_NONE; |
| } |
| } else { |
| currentDT = null; |
| currentDTC = null; |
| currentDA = DnDConstants.ACTION_NONE; |
| currentSA = DnDConstants.ACTION_NONE; |
| currentA = DnDConstants.ACTION_NONE; |
| } |
| |
| } |
| |
| /** |
| * upcall to handle exit messages |
| */ |
| |
| private void handleExitMessage(final Component component, |
| final long nativeCtxt) { |
| /* |
| * Even though the return value is irrelevant for this event, it is |
| * dispatched synchronously to fix 4393148 properly. |
| */ |
| postDropTargetEvent(component, 0, 0, DnDConstants.ACTION_NONE, |
| DnDConstants.ACTION_NONE, null, nativeCtxt, |
| SunDropTargetEvent.MOUSE_EXITED, |
| SunDropTargetContextPeer.DISPATCH_SYNC); |
| } |
| |
| /** |
| * |
| */ |
| |
| protected void processExitMessage(SunDropTargetEvent event) { |
| Component c = (Component)event.getSource(); |
| DropTarget dt = c.getDropTarget(); |
| DropTargetContext dtc = null; |
| |
| if (dt == null) { |
| currentDT = null; |
| currentT = null; |
| |
| if (currentDTC != null) { |
| currentDTC.removeNotify(); |
| } |
| |
| currentDTC = null; |
| |
| return; |
| } |
| |
| if (dt != currentDT) { |
| |
| if (currentDTC != null) { |
| currentDTC.removeNotify(); |
| } |
| |
| currentDT = dt; |
| currentDTC = dt.getDropTargetContext(); |
| |
| currentDTC.addNotify(this); |
| } |
| |
| dtc = currentDTC; |
| |
| if (dt.isActive()) try { |
| ((DropTargetListener)dt).dragExit(new DropTargetEvent(dtc)); |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } finally { |
| currentA = DnDConstants.ACTION_NONE; |
| currentSA = DnDConstants.ACTION_NONE; |
| currentDA = DnDConstants.ACTION_NONE; |
| currentDT = null; |
| currentT = null; |
| |
| currentDTC.removeNotify(); |
| currentDTC = null; |
| |
| local = null; |
| |
| dragRejected = false; |
| } |
| } |
| |
| private int handleMotionMessage(final Component component, |
| final int x, final int y, |
| final int dropAction, |
| final int actions, final long[] formats, |
| final long nativeCtxt) { |
| return postDropTargetEvent(component, x, y, dropAction, actions, |
| formats, nativeCtxt, |
| SunDropTargetEvent.MOUSE_DRAGGED, |
| SunDropTargetContextPeer.DISPATCH_SYNC); |
| } |
| |
| /** |
| * |
| */ |
| |
| protected void processMotionMessage(SunDropTargetEvent event, |
| boolean operationChanged) { |
| Component c = (Component)event.getSource(); |
| Point hots = event.getPoint(); |
| int id = event.getID(); |
| DropTarget dt = c.getDropTarget(); |
| DropTargetContext dtc = null; |
| |
| if (c.isShowing() && (dt != null) && dt.isActive()) { |
| if (currentDT != dt) { |
| if (currentDTC != null) { |
| currentDTC.removeNotify(); |
| } |
| |
| currentDT = dt; |
| currentDTC = null; |
| } |
| |
| dtc = currentDT.getDropTargetContext(); |
| if (dtc != currentDTC) { |
| if (currentDTC != null) { |
| currentDTC.removeNotify(); |
| } |
| |
| currentDTC = dtc; |
| currentDTC.addNotify(this); |
| } |
| |
| currentA = currentDT.getDefaultActions(); |
| |
| try { |
| DropTargetDragEvent dtde = new DropTargetDragEvent(dtc, |
| hots, |
| currentDA, |
| currentSA); |
| DropTargetListener dtl = (DropTargetListener)dt; |
| if (operationChanged) { |
| dtl.dropActionChanged(dtde); |
| } else { |
| dtl.dragOver(dtde); |
| } |
| |
| if (dragRejected) { |
| currentDA = DnDConstants.ACTION_NONE; |
| } |
| } catch (Exception e) { |
| e.printStackTrace(); |
| currentDA = DnDConstants.ACTION_NONE; |
| } |
| } else { |
| currentDA = DnDConstants.ACTION_NONE; |
| } |
| } |
| |
| /** |
| * upcall to handle the Drop message |
| */ |
| |
| private void handleDropMessage(final Component component, |
| final int x, final int y, |
| final int dropAction, final int actions, |
| final long[] formats, |
| final long nativeCtxt) { |
| postDropTargetEvent(component, x, y, dropAction, actions, |
| formats, nativeCtxt, |
| SunDropTargetEvent.MOUSE_DROPPED, |
| !SunDropTargetContextPeer.DISPATCH_SYNC); |
| } |
| |
| /** |
| * |
| */ |
| |
| protected void processDropMessage(SunDropTargetEvent event) { |
| Component c = (Component)event.getSource(); |
| Point hots = event.getPoint(); |
| DropTarget dt = c.getDropTarget(); |
| |
| dropStatus = STATUS_WAIT; // drop pending ACK |
| dropComplete = false; |
| |
| if (c.isShowing() && dt != null && dt.isActive()) { |
| DropTargetContext dtc = dt.getDropTargetContext(); |
| |
| currentDT = dt; |
| |
| if (currentDTC != null) { |
| currentDTC.removeNotify(); |
| } |
| |
| currentDTC = dtc; |
| currentDTC.addNotify(this); |
| currentA = dt.getDefaultActions(); |
| |
| synchronized(_globalLock) { |
| if ((local = getJVMLocalSourceTransferable()) != null) |
| setCurrentJVMLocalSourceTransferable(null); |
| } |
| |
| dropInProcess = true; |
| |
| try { |
| ((DropTargetListener)dt).drop(new DropTargetDropEvent(dtc, |
| hots, |
| currentDA, |
| currentSA, |
| local != null)); |
| } finally { |
| if (dropStatus == STATUS_WAIT) { |
| rejectDrop(); |
| } else if (dropComplete == false) { |
| dropComplete(false); |
| } |
| dropInProcess = false; |
| } |
| } else { |
| rejectDrop(); |
| } |
| } |
| |
| protected int postDropTargetEvent(final Component component, |
| final int x, final int y, |
| final int dropAction, |
| final int actions, |
| final long[] formats, |
| final long nativeCtxt, |
| final int eventID, |
| final boolean dispatchType) { |
| AppContext appContext = SunToolkit.targetToAppContext(component); |
| |
| EventDispatcher dispatcher = |
| new EventDispatcher(this, dropAction, actions, formats, nativeCtxt, |
| dispatchType); |
| |
| SunDropTargetEvent event = |
| new SunDropTargetEvent(component, eventID, x, y, dispatcher); |
| |
| if (dispatchType == SunDropTargetContextPeer.DISPATCH_SYNC) { |
| DataTransferer.getInstance().getToolkitThreadBlockedHandler().lock(); |
| } |
| |
| // schedule callback |
| SunToolkit.postEvent(appContext, event); |
| |
| eventPosted(event); |
| |
| if (dispatchType == SunDropTargetContextPeer.DISPATCH_SYNC) { |
| while (!dispatcher.isDone()) { |
| DataTransferer.getInstance().getToolkitThreadBlockedHandler().enter(); |
| } |
| |
| DataTransferer.getInstance().getToolkitThreadBlockedHandler().unlock(); |
| |
| // return target's response |
| return dispatcher.getReturnValue(); |
| } else { |
| return 0; |
| } |
| } |
| |
| /** |
| * acceptDrag |
| */ |
| |
| public synchronized void acceptDrag(int dragOperation) { |
| if (currentDT == null) { |
| throw new InvalidDnDOperationException("No Drag pending"); |
| } |
| currentDA = mapOperation(dragOperation); |
| if (currentDA != DnDConstants.ACTION_NONE) { |
| dragRejected = false; |
| } |
| } |
| |
| /** |
| * rejectDrag |
| */ |
| |
| public synchronized void rejectDrag() { |
| if (currentDT == null) { |
| throw new InvalidDnDOperationException("No Drag pending"); |
| } |
| currentDA = DnDConstants.ACTION_NONE; |
| dragRejected = true; |
| } |
| |
| /** |
| * acceptDrop |
| */ |
| |
| public synchronized void acceptDrop(int dropOperation) { |
| if (dropOperation == DnDConstants.ACTION_NONE) |
| throw new IllegalArgumentException("invalid acceptDrop() action"); |
| |
| if (dropStatus != STATUS_WAIT) { |
| throw new InvalidDnDOperationException("invalid acceptDrop()"); |
| } |
| |
| currentDA = currentA = mapOperation(dropOperation & currentSA); |
| |
| dropStatus = STATUS_ACCEPT; |
| dropComplete = false; |
| } |
| |
| /** |
| * reject Drop |
| */ |
| |
| public synchronized void rejectDrop() { |
| if (dropStatus != STATUS_WAIT) { |
| throw new InvalidDnDOperationException("invalid rejectDrop()"); |
| } |
| dropStatus = STATUS_REJECT; |
| /* |
| * Fix for 4285634. |
| * The target rejected the drop means that it doesn't perform any |
| * drop action. This change is to make Solaris behavior consistent |
| * with Win32. |
| */ |
| currentDA = DnDConstants.ACTION_NONE; |
| dropComplete(false); |
| } |
| |
| /** |
| * mapOperation |
| */ |
| |
| private int mapOperation(int operation) { |
| int[] operations = { |
| DnDConstants.ACTION_MOVE, |
| DnDConstants.ACTION_COPY, |
| DnDConstants.ACTION_LINK, |
| }; |
| int ret = DnDConstants.ACTION_NONE; |
| |
| for (int i = 0; i < operations.length; i++) { |
| if ((operation & operations[i]) == operations[i]) { |
| ret = operations[i]; |
| break; |
| } |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * signal drop complete |
| */ |
| |
| public synchronized void dropComplete(boolean success) { |
| if (dropStatus == STATUS_NONE) { |
| throw new InvalidDnDOperationException("No Drop pending"); |
| } |
| |
| if (currentDTC != null) currentDTC.removeNotify(); |
| |
| currentDT = null; |
| currentDTC = null; |
| currentT = null; |
| currentA = DnDConstants.ACTION_NONE; |
| |
| synchronized(_globalLock) { |
| currentJVMLocalSourceTransferable = null; |
| } |
| |
| dropStatus = STATUS_NONE; |
| dropComplete = true; |
| |
| try { |
| doDropDone(success, currentDA, local != null); |
| } finally { |
| currentDA = DnDConstants.ACTION_NONE; |
| // The native context is invalid after the drop is done. |
| // Clear the reference to prohibit access. |
| nativeDragContext = 0; |
| } |
| } |
| |
| protected abstract void doDropDone(boolean success, |
| int dropAction, boolean isLocal); |
| |
| protected synchronized long getNativeDragContext() { |
| return nativeDragContext; |
| } |
| |
| protected void eventPosted(SunDropTargetEvent e) {} |
| |
| protected void eventProcessed(SunDropTargetEvent e, int returnValue, |
| boolean dispatcherDone) {} |
| |
| protected static class EventDispatcher { |
| |
| private final SunDropTargetContextPeer peer; |
| |
| // context fields |
| private final int dropAction; |
| private final int actions; |
| private final long[] formats; |
| private long nativeCtxt; |
| private final boolean dispatchType; |
| private boolean dispatcherDone = false; |
| |
| // dispatcher state fields |
| private int returnValue = 0; |
| // set of events to be dispatched by this dispatcher |
| private final HashSet eventSet = new HashSet(3); |
| |
| static final ToolkitThreadBlockedHandler handler = |
| DataTransferer.getInstance().getToolkitThreadBlockedHandler(); |
| |
| EventDispatcher(SunDropTargetContextPeer peer, |
| int dropAction, |
| int actions, |
| long[] formats, |
| long nativeCtxt, |
| boolean dispatchType) { |
| |
| this.peer = peer; |
| this.nativeCtxt = nativeCtxt; |
| this.dropAction = dropAction; |
| this.actions = actions; |
| this.formats = |
| (null == formats) ? null : Arrays.copyOf(formats, formats.length); |
| this.dispatchType = dispatchType; |
| } |
| |
| void dispatchEvent(SunDropTargetEvent e) { |
| int id = e.getID(); |
| |
| switch (id) { |
| case SunDropTargetEvent.MOUSE_ENTERED: |
| dispatchEnterEvent(e); |
| break; |
| case SunDropTargetEvent.MOUSE_DRAGGED: |
| dispatchMotionEvent(e); |
| break; |
| case SunDropTargetEvent.MOUSE_EXITED: |
| dispatchExitEvent(e); |
| break; |
| case SunDropTargetEvent.MOUSE_DROPPED: |
| dispatchDropEvent(e); |
| break; |
| default: |
| throw new InvalidDnDOperationException(); |
| } |
| } |
| |
| private void dispatchEnterEvent(SunDropTargetEvent e) { |
| synchronized (peer) { |
| |
| // store the drop action here to track operation changes |
| peer.previousDA = dropAction; |
| |
| // setup peer context |
| peer.nativeDragContext = nativeCtxt; |
| peer.currentT = formats; |
| peer.currentSA = actions; |
| peer.currentDA = dropAction; |
| // To allow data retrieval. |
| peer.dropStatus = STATUS_ACCEPT; |
| peer.dropComplete = false; |
| |
| try { |
| peer.processEnterMessage(e); |
| } finally { |
| peer.dropStatus = STATUS_NONE; |
| } |
| |
| setReturnValue(peer.currentDA); |
| } |
| } |
| |
| private void dispatchMotionEvent(SunDropTargetEvent e) { |
| synchronized (peer) { |
| |
| boolean operationChanged = peer.previousDA != dropAction; |
| peer.previousDA = dropAction; |
| |
| // setup peer context |
| peer.nativeDragContext = nativeCtxt; |
| peer.currentT = formats; |
| peer.currentSA = actions; |
| peer.currentDA = dropAction; |
| // To allow data retrieval. |
| peer.dropStatus = STATUS_ACCEPT; |
| peer.dropComplete = false; |
| |
| try { |
| peer.processMotionMessage(e, operationChanged); |
| } finally { |
| peer.dropStatus = STATUS_NONE; |
| } |
| |
| setReturnValue(peer.currentDA); |
| } |
| } |
| |
| private void dispatchExitEvent(SunDropTargetEvent e) { |
| synchronized (peer) { |
| |
| // setup peer context |
| peer.nativeDragContext = nativeCtxt; |
| |
| peer.processExitMessage(e); |
| } |
| } |
| |
| private void dispatchDropEvent(SunDropTargetEvent e) { |
| synchronized (peer) { |
| |
| // setup peer context |
| peer.nativeDragContext = nativeCtxt; |
| peer.currentT = formats; |
| peer.currentSA = actions; |
| peer.currentDA = dropAction; |
| |
| peer.processDropMessage(e); |
| } |
| } |
| |
| void setReturnValue(int ret) { |
| returnValue = ret; |
| } |
| |
| int getReturnValue() { |
| return returnValue; |
| } |
| |
| boolean isDone() { |
| return eventSet.isEmpty(); |
| } |
| |
| void registerEvent(SunDropTargetEvent e) { |
| handler.lock(); |
| if (!eventSet.add(e) && dndLog.isLoggable(PlatformLogger.Level.FINE)) { |
| dndLog.fine("Event is already registered: " + e); |
| } |
| handler.unlock(); |
| } |
| |
| void unregisterEvent(SunDropTargetEvent e) { |
| handler.lock(); |
| try { |
| if (!eventSet.remove(e)) { |
| // This event has already been unregistered. |
| return; |
| } |
| if (eventSet.isEmpty()) { |
| if (!dispatcherDone && dispatchType == DISPATCH_SYNC) { |
| handler.exit(); |
| } |
| dispatcherDone = true; |
| } |
| } finally { |
| handler.unlock(); |
| } |
| |
| try { |
| peer.eventProcessed(e, returnValue, dispatcherDone); |
| } finally { |
| /* |
| * Clear the reference to the native context if all copies of |
| * the original event are processed. |
| */ |
| if (dispatcherDone) { |
| nativeCtxt = 0; |
| // Fix for 6342381 |
| peer.nativeDragContext = 0; |
| |
| } |
| } |
| } |
| |
| public void unregisterAllEvents() { |
| Object[] events = null; |
| handler.lock(); |
| try { |
| events = eventSet.toArray(); |
| } finally { |
| handler.unlock(); |
| } |
| |
| if (events != null) { |
| for (int i = 0; i < events.length; i++) { |
| unregisterEvent((SunDropTargetEvent)events[i]); |
| } |
| } |
| } |
| } |
| } |
