author | prr |
Sat, 19 Sep 2015 15:45:59 -0700 | |
changeset 32865 | f9cb6e427f9e |
parent 30469 | bac0a7ff7e1e |
child 33674 | 566777f73c32 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003, 2015, Oracle and/or its affiliates. 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. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.awt.X11; |
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import java.awt.Component; |
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import java.awt.peer.ComponentPeer; |
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import java.io.IOException; |
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import java.util.Iterator; |
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import sun.awt.AWTAccessor; |
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import sun.util.logging.PlatformLogger; |
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import sun.awt.AppContext; |
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import sun.awt.SunToolkit; |
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import sun.awt.dnd.SunDropTargetContextPeer; |
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import sun.awt.dnd.SunDropTargetEvent; |
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import sun.misc.Unsafe; |
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/** |
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* The XDropTargetContextPeer is the class responsible for handling |
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* the interaction between the XDnD/Motif DnD subsystem and Java drop targets. |
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* |
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* @since 1.5 |
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*/ |
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final class XDropTargetContextPeer extends SunDropTargetContextPeer { |
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private static final PlatformLogger logger = |
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PlatformLogger.getLogger("sun.awt.X11.xembed.xdnd.XDropTargetContextPeer"); |
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private static final Unsafe unsafe = XlibWrapper.unsafe; |
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/* |
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* A key to store a peer instance for an AppContext. |
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*/ |
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private static final Object DTCP_KEY = "DropTargetContextPeer"; |
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private XDropTargetContextPeer() {} |
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static XDropTargetContextPeer getPeer(AppContext appContext) { |
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synchronized (_globalLock) { |
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XDropTargetContextPeer peer = |
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(XDropTargetContextPeer)appContext.get(DTCP_KEY); |
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if (peer == null) { |
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peer = new XDropTargetContextPeer(); |
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appContext.put(DTCP_KEY, peer); |
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} |
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return peer; |
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} |
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} |
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static XDropTargetProtocolListener getXDropTargetProtocolListener() { |
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return XDropTargetProtocolListenerImpl.getInstance(); |
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} |
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/* |
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* @param returnValue the drop action selected by the Java drop target. |
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*/ |
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protected void eventProcessed(SunDropTargetEvent e, int returnValue, |
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boolean dispatcherDone) { |
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/* The native context is the pointer to the XClientMessageEvent |
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structure. */ |
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long ctxt = getNativeDragContext(); |
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/* If the event was not consumed, send a response to the source. */ |
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try { |
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if (ctxt != 0 && !e.isConsumed()) { |
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Iterator<XDropTargetProtocol> dropTargetProtocols = |
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XDragAndDropProtocols.getDropTargetProtocols(); |
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while (dropTargetProtocols.hasNext()) { |
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XDropTargetProtocol dropTargetProtocol = |
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dropTargetProtocols.next(); |
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if (dropTargetProtocol.sendResponse(ctxt, e.getID(), |
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returnValue)) { |
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break; |
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} |
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} |
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} |
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} finally { |
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if (dispatcherDone && ctxt != 0) { |
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unsafe.freeMemory(ctxt); |
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} |
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} |
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} |
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protected void doDropDone(boolean success, int dropAction, |
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boolean isLocal) { |
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/* The native context is the pointer to the XClientMessageEvent |
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structure. */ |
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long ctxt = getNativeDragContext(); |
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if (ctxt != 0) { |
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try { |
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Iterator<XDropTargetProtocol> dropTargetProtocols = |
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XDragAndDropProtocols.getDropTargetProtocols(); |
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while (dropTargetProtocols.hasNext()) { |
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XDropTargetProtocol dropTargetProtocol = |
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dropTargetProtocols.next(); |
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if (dropTargetProtocol.sendDropDone(ctxt, success, |
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dropAction)) { |
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break; |
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} |
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} |
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} finally { |
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unsafe.freeMemory(ctxt); |
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} |
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} |
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} |
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protected Object getNativeData(long format) |
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throws IOException { |
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/* The native context is the pointer to the XClientMessageEvent |
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structure. */ |
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long ctxt = getNativeDragContext(); |
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if (ctxt != 0) { |
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Iterator<XDropTargetProtocol> dropTargetProtocols = |
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XDragAndDropProtocols.getDropTargetProtocols(); |
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while (dropTargetProtocols.hasNext()) { |
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XDropTargetProtocol dropTargetProtocol = |
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dropTargetProtocols.next(); |
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// getData throws IAE if ctxt is not for this protocol. |
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try { |
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return dropTargetProtocol.getData(ctxt, format); |
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} catch (IllegalArgumentException iae) { |
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} |
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} |
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} |
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return null; |
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} |
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private void cleanup() { |
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} |
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protected void processEnterMessage(SunDropTargetEvent event) { |
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if (!processSunDropTargetEvent(event)) { |
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super.processEnterMessage(event); |
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} |
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} |
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protected void processExitMessage(SunDropTargetEvent event) { |
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if (!processSunDropTargetEvent(event)) { |
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super.processExitMessage(event); |
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} |
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} |
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protected void processMotionMessage(SunDropTargetEvent event, |
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boolean operationChanged) { |
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if (!processSunDropTargetEvent(event)) { |
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super.processMotionMessage(event, operationChanged); |
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} |
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} |
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protected void processDropMessage(SunDropTargetEvent event) { |
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if (!processSunDropTargetEvent(event)) { |
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super.processDropMessage(event); |
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} |
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} |
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// If source is an XEmbedCanvasPeer, passes the event to it for processing and |
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// return true if the event is forwarded to the XEmbed child. |
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// Otherwise, does nothing and return false. |
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private boolean processSunDropTargetEvent(SunDropTargetEvent event) { |
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Object source = event.getSource(); |
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if (source instanceof Component) { |
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Object peer = AWTAccessor.getComponentAccessor() |
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.getPeer((Component) source); |
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if (peer instanceof XEmbedCanvasPeer) { |
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XEmbedCanvasPeer xEmbedCanvasPeer = (XEmbedCanvasPeer)peer; |
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/* The native context is the pointer to the XClientMessageEvent |
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structure. */ |
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long ctxt = getNativeDragContext(); |
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if (logger.isLoggable(PlatformLogger.Level.FINER)) { |
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logger.finer(" processing " + event + " ctxt=" + ctxt + |
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" consumed=" + event.isConsumed()); |
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} |
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/* If the event is not consumed, pass it to the |
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XEmbedCanvasPeer for processing. */ |
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if (!event.isConsumed()) { |
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// NOTE: ctxt can be zero at this point. |
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if (xEmbedCanvasPeer.processXEmbedDnDEvent(ctxt, |
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event.getID())) { |
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event.consume(); |
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return true; |
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} |
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} |
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} |
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} |
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return false; |
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} |
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public void forwardEventToEmbedded(long embedded, long ctxt, |
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int eventID) { |
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Iterator<XDropTargetProtocol> dropTargetProtocols = |
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XDragAndDropProtocols.getDropTargetProtocols(); |
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while (dropTargetProtocols.hasNext()) { |
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diff
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XDropTargetProtocol dropTargetProtocol = dropTargetProtocols.next(); |
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if (dropTargetProtocol.forwardEventToEmbedded(embedded, ctxt, |
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eventID)) { |
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break; |
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} |
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} |
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} |
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static final class XDropTargetProtocolListenerImpl |
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implements XDropTargetProtocolListener { |
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f9cb6e427f9e
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private static final XDropTargetProtocolListener theInstance = |
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new XDropTargetProtocolListenerImpl(); |
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private XDropTargetProtocolListenerImpl() {} |
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static XDropTargetProtocolListener getInstance() { |
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return theInstance; |
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} |
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public void handleDropTargetNotification(XWindow xwindow, int x, int y, |
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int dropAction, int actions, |
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long[] formats, long nativeCtxt, |
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int eventID) { |
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Object target = xwindow.getTarget(); |
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// The Every component is associated with some AppContext. |
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assert target instanceof Component; |
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Component component = (Component)target; |
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AppContext appContext = SunToolkit.targetToAppContext(target); |
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// Every component is associated with some AppContext. |
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assert appContext != null; |
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XDropTargetContextPeer peer = XDropTargetContextPeer.getPeer(appContext); |
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peer.postDropTargetEvent(component, x, y, dropAction, actions, formats, |
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nativeCtxt, eventID, |
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!SunDropTargetContextPeer.DISPATCH_SYNC); |
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} |
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} |
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} |