| /* |
| * Copyright (c) 2003, 2004, 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.X11; |
| |
| import java.awt.Component; |
| import java.awt.peer.ComponentPeer; |
| |
| import java.io.IOException; |
| |
| import java.util.Iterator; |
| |
| import sun.util.logging.PlatformLogger; |
| |
| import sun.awt.AppContext; |
| import sun.awt.SunToolkit; |
| |
| import sun.awt.dnd.SunDropTargetContextPeer; |
| import sun.awt.dnd.SunDropTargetEvent; |
| |
| import sun.misc.Unsafe; |
| |
| /** |
| * The XDropTargetContextPeer is the class responsible for handling |
| * the interaction between the XDnD/Motif DnD subsystem and Java drop targets. |
| * |
| * @since 1.5 |
| */ |
| final class XDropTargetContextPeer extends SunDropTargetContextPeer { |
| private static final PlatformLogger logger = |
| PlatformLogger.getLogger("sun.awt.X11.xembed.xdnd.XDropTargetContextPeer"); |
| |
| private static final Unsafe unsafe = XlibWrapper.unsafe; |
| |
| /* |
| * A key to store a peer instance for an AppContext. |
| */ |
| private static final Object DTCP_KEY = "DropTargetContextPeer"; |
| |
| private XDropTargetContextPeer() {} |
| |
| static XDropTargetContextPeer getPeer(AppContext appContext) { |
| synchronized (_globalLock) { |
| XDropTargetContextPeer peer = |
| (XDropTargetContextPeer)appContext.get(DTCP_KEY); |
| if (peer == null) { |
| peer = new XDropTargetContextPeer(); |
| appContext.put(DTCP_KEY, peer); |
| } |
| |
| return peer; |
| } |
| } |
| |
| static XDropTargetProtocolListener getXDropTargetProtocolListener() { |
| return XDropTargetProtocolListenerImpl.getInstance(); |
| } |
| |
| /* |
| * @param returnValue the drop action selected by the Java drop target. |
| */ |
| protected void eventProcessed(SunDropTargetEvent e, int returnValue, |
| boolean dispatcherDone) { |
| /* The native context is the pointer to the XClientMessageEvent |
| structure. */ |
| long ctxt = getNativeDragContext(); |
| /* If the event was not consumed, send a response to the source. */ |
| try { |
| if (ctxt != 0 && !e.isConsumed()) { |
| Iterator dropTargetProtocols = |
| XDragAndDropProtocols.getDropTargetProtocols(); |
| |
| while (dropTargetProtocols.hasNext()) { |
| XDropTargetProtocol dropTargetProtocol = |
| (XDropTargetProtocol)dropTargetProtocols.next(); |
| if (dropTargetProtocol.sendResponse(ctxt, e.getID(), |
| returnValue)) { |
| break; |
| } |
| } |
| } |
| } finally { |
| if (dispatcherDone && ctxt != 0) { |
| unsafe.freeMemory(ctxt); |
| } |
| } |
| } |
| |
| protected void doDropDone(boolean success, int dropAction, |
| boolean isLocal) { |
| /* The native context is the pointer to the XClientMessageEvent |
| structure. */ |
| long ctxt = getNativeDragContext(); |
| |
| if (ctxt != 0) { |
| try { |
| Iterator dropTargetProtocols = |
| XDragAndDropProtocols.getDropTargetProtocols(); |
| |
| while (dropTargetProtocols.hasNext()) { |
| XDropTargetProtocol dropTargetProtocol = |
| (XDropTargetProtocol)dropTargetProtocols.next(); |
| if (dropTargetProtocol.sendDropDone(ctxt, success, |
| dropAction)) { |
| break; |
| } |
| } |
| } finally { |
| unsafe.freeMemory(ctxt); |
| } |
| } |
| } |
| |
| protected Object getNativeData(long format) |
| throws IOException { |
| /* The native context is the pointer to the XClientMessageEvent |
| structure. */ |
| long ctxt = getNativeDragContext(); |
| |
| if (ctxt != 0) { |
| Iterator dropTargetProtocols = |
| XDragAndDropProtocols.getDropTargetProtocols(); |
| |
| while (dropTargetProtocols.hasNext()) { |
| XDropTargetProtocol dropTargetProtocol = |
| (XDropTargetProtocol)dropTargetProtocols.next(); |
| // getData throws IAE if ctxt is not for this protocol. |
| try { |
| return dropTargetProtocol.getData(ctxt, format); |
| } catch (IllegalArgumentException iae) { |
| } |
| } |
| } |
| |
| return null; |
| } |
| |
| private void cleanup() { |
| } |
| |
| protected void processEnterMessage(SunDropTargetEvent event) { |
| if (!processSunDropTargetEvent(event)) { |
| super.processEnterMessage(event); |
| } |
| } |
| |
| protected void processExitMessage(SunDropTargetEvent event) { |
| if (!processSunDropTargetEvent(event)) { |
| super.processExitMessage(event); |
| } |
| } |
| |
| protected void processMotionMessage(SunDropTargetEvent event, |
| boolean operationChanged) { |
| if (!processSunDropTargetEvent(event)) { |
| super.processMotionMessage(event, operationChanged); |
| } |
| } |
| |
| protected void processDropMessage(SunDropTargetEvent event) { |
| if (!processSunDropTargetEvent(event)) { |
| super.processDropMessage(event); |
| } |
| } |
| |
| // If source is an XEmbedCanvasPeer, passes the event to it for processing and |
| // return true if the event is forwarded to the XEmbed child. |
| // Otherwise, does nothing and return false. |
| private boolean processSunDropTargetEvent(SunDropTargetEvent event) { |
| Object source = event.getSource(); |
| |
| if (source instanceof Component) { |
| ComponentPeer peer = ((Component)source).getPeer(); |
| if (peer instanceof XEmbedCanvasPeer) { |
| XEmbedCanvasPeer xEmbedCanvasPeer = (XEmbedCanvasPeer)peer; |
| /* The native context is the pointer to the XClientMessageEvent |
| structure. */ |
| long ctxt = getNativeDragContext(); |
| |
| if (logger.isLoggable(PlatformLogger.FINER)) { |
| logger.finer(" processing " + event + " ctxt=" + ctxt + |
| " consumed=" + event.isConsumed()); |
| } |
| /* If the event is not consumed, pass it to the |
| XEmbedCanvasPeer for processing. */ |
| if (!event.isConsumed()) { |
| // NOTE: ctxt can be zero at this point. |
| if (xEmbedCanvasPeer.processXEmbedDnDEvent(ctxt, |
| event.getID())) { |
| event.consume(); |
| return true; |
| } |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| public void forwardEventToEmbedded(long embedded, long ctxt, |
| int eventID) { |
| Iterator dropTargetProtocols = |
| XDragAndDropProtocols.getDropTargetProtocols(); |
| |
| while (dropTargetProtocols.hasNext()) { |
| XDropTargetProtocol dropTargetProtocol = |
| (XDropTargetProtocol)dropTargetProtocols.next(); |
| if (dropTargetProtocol.forwardEventToEmbedded(embedded, ctxt, |
| eventID)) { |
| break; |
| } |
| } |
| } |
| |
| static final class XDropTargetProtocolListenerImpl |
| implements XDropTargetProtocolListener { |
| |
| private final static XDropTargetProtocolListener theInstance = |
| new XDropTargetProtocolListenerImpl(); |
| |
| private XDropTargetProtocolListenerImpl() {} |
| |
| static XDropTargetProtocolListener getInstance() { |
| return theInstance; |
| } |
| |
| public void handleDropTargetNotification(XWindow xwindow, int x, int y, |
| int dropAction, int actions, |
| long[] formats, long nativeCtxt, |
| int eventID) { |
| Object target = xwindow.getTarget(); |
| |
| // The Every component is associated with some AppContext. |
| assert target instanceof Component; |
| |
| Component component = (Component)target; |
| |
| AppContext appContext = SunToolkit.targetToAppContext(target); |
| |
| // Every component is associated with some AppContext. |
| assert appContext != null; |
| |
| XDropTargetContextPeer peer = XDropTargetContextPeer.getPeer(appContext); |
| |
| peer.postDropTargetEvent(component, x, y, dropAction, actions, formats, |
| nativeCtxt, eventID, |
| !SunDropTargetContextPeer.DISPATCH_SYNC); |
| } |
| } |
| } |