| /* |
| * Copyright 2003-2004 Sun Microsystems, Inc. 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. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| package sun.awt.motif; |
| |
| import java.awt.Component; |
| import java.awt.peer.ComponentPeer; |
| |
| import sun.awt.AppContext; |
| import sun.awt.SunToolkit; |
| |
| import sun.awt.dnd.SunDropTargetContextPeer; |
| import sun.awt.dnd.SunDropTargetEvent; |
| |
| /** |
| * The X11DropTargetContextPeer class is the class responsible for handling |
| * the interaction between the XDnD/Motif DnD subsystem and Java drop targets. |
| * |
| * @since 1.5 |
| */ |
| final class X11DropTargetContextPeer extends SunDropTargetContextPeer { |
| |
| /* |
| * A key to store a peer instance for an AppContext. |
| */ |
| private static final Object DTCP_KEY = "DropTargetContextPeer"; |
| |
| private X11DropTargetContextPeer() {} |
| |
| public static X11DropTargetContextPeer getPeer(AppContext appContext) { |
| synchronized (_globalLock) { |
| X11DropTargetContextPeer peer = |
| (X11DropTargetContextPeer)appContext.get(DTCP_KEY); |
| if (peer == null) { |
| peer = new X11DropTargetContextPeer(); |
| appContext.put(DTCP_KEY, peer); |
| } |
| |
| return peer; |
| } |
| } |
| |
| /* |
| * Note: |
| * the method can be called on the toolkit thread while holding AWT_LOCK. |
| */ |
| private static void postDropTargetEventToPeer(final Component component, |
| final int x, final int y, |
| final int dropAction, |
| final int actions, |
| final long[] formats, |
| final long nativeCtxt, |
| final int eventID) { |
| |
| AppContext appContext = SunToolkit.targetToAppContext(component); |
| X11DropTargetContextPeer peer = getPeer(appContext); |
| |
| peer.postDropTargetEvent(component, x, y, dropAction, actions, formats, |
| nativeCtxt, eventID, |
| !SunDropTargetContextPeer.DISPATCH_SYNC); |
| } |
| |
| protected void eventProcessed(SunDropTargetEvent e, int returnValue, |
| boolean dispatcherDone) { |
| /* If the event was not consumed, send a response to the source. */ |
| long ctxt = getNativeDragContext(); |
| if (ctxt != 0) { |
| sendResponse(e.getID(), returnValue, ctxt, dispatcherDone, |
| e.isConsumed()); |
| } |
| } |
| |
| protected void doDropDone(boolean success, int dropAction, |
| boolean isLocal) { |
| dropDone(getNativeDragContext(), success, dropAction); |
| } |
| |
| protected Object getNativeData(long format) { |
| return getData(getNativeDragContext(), format); |
| } |
| |
| 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 MEmbedCanvasPeer) { |
| MEmbedCanvasPeer mEmbedCanvasPeer = (MEmbedCanvasPeer)peer; |
| /* The native context is the pointer to the XClientMessageEvent |
| structure. */ |
| long ctxt = getNativeDragContext(); |
| |
| /* If the event is not consumed, pass it to the |
| MEmbedCanvasPeer for processing. */ |
| if (!event.isConsumed()) { |
| // NOTE: ctxt can be zero at this point. |
| if (mEmbedCanvasPeer.processXEmbedDnDEvent(ctxt, |
| event.getID())) { |
| event.consume(); |
| return true; |
| } |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| private native void sendResponse(int eventID, int returnValue, |
| long nativeCtxt, boolean dispatcherDone, |
| boolean consumed); |
| |
| private native void dropDone(long nativeCtxt, boolean success, |
| int dropAction); |
| |
| private native Object getData(long nativeCtxt, long format); |
| } |