/*
* Copyright (c) 2011, 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.lwawt.macosx;
import java.awt.*;
import sun.awt.dnd.SunDropTargetContextPeer;
import sun.awt.dnd.SunDropTargetEvent;
import javax.swing.*;
final class CDropTargetContextPeer extends SunDropTargetContextPeer {
private long fNativeDropTransfer = 0;
private long fNativeDataAvailable = 0;
private Object fNativeData = null;
private boolean insideTarget = true;
Object awtLockAccess = new Object();
static CDropTargetContextPeer getDropTargetContextPeer() {
return new CDropTargetContextPeer();
}
private CDropTargetContextPeer() {
super();
}
// We block, waiting for an empty event to get posted (CToolkit.invokeAndWait)
// This is so we finish dispatching DropTarget events before we dispatch the dragDropFinished event (which is a higher priority).
private void flushEvents(Component c) {
try {
LWCToolkit.invokeAndWait(new Runnable() {
public synchronized void run() {
}
}, c);
}
catch(Exception e) {
e.printStackTrace();
}
}
protected Object getNativeData(long format) {
long nativeDropTarget = this.getNativeDragContext();
synchronized (awtLockAccess) {
fNativeDataAvailable = 0;
if (fNativeDropTransfer == 0) {
fNativeDropTransfer = startTransfer(nativeDropTarget, format);
} else {
addTransfer(nativeDropTarget, fNativeDropTransfer, format);
}
while (format != fNativeDataAvailable) {
try {
awtLockAccess.wait();
} catch (Throwable e) {
e.printStackTrace();
}
}
}
return fNativeData;
}
// We need to take care of dragExit message because for some reason it is not being
// generated for lightweight components
@Override
protected void processMotionMessage(SunDropTargetEvent event, boolean operationChanged) {
Component eventSource = (Component)event.getComponent();
Point screenPoint = event.getPoint();
SwingUtilities.convertPointToScreen(screenPoint, eventSource);
Rectangle screenBounds = new Rectangle(eventSource.getLocationOnScreen().x,
eventSource.getLocationOnScreen().y,
eventSource.getWidth(), eventSource.getHeight());
if(insideTarget) {
if(!screenBounds.contains(screenPoint)) {
processExitMessage(event);
insideTarget = false;
return;
}
} else {
if(screenBounds.contains(screenPoint)) {
processEnterMessage(event);
insideTarget = true;
} else {
return;
}
}
super.processMotionMessage(event, operationChanged);
}
@Override
protected void processDropMessage(SunDropTargetEvent event) {
Component eventSource = (Component)event.getComponent();
Point screenPoint = event.getPoint();
SwingUtilities.convertPointToScreen(screenPoint, eventSource);
Rectangle screenBounds = new Rectangle(eventSource.getLocationOnScreen().x,
eventSource.getLocationOnScreen().y,
eventSource.getWidth(), eventSource.getHeight());
if(screenBounds.contains(screenPoint)) {
super.processDropMessage(event);
}
}
@Override
protected int postDropTargetEvent(Component component, int x, int y, int dropAction,
int actions, long[] formats, long nativeCtxt, int eventID,
boolean dispatchType) {
// On MacOS X all the DnD events should be synchronous
return super.postDropTargetEvent(component, x, y, dropAction, actions, formats, nativeCtxt,
eventID, SunDropTargetContextPeer.DISPATCH_SYNC);
}
// Signal drop complete:
protected void doDropDone(boolean success, int dropAction, boolean isLocal) {
long nativeDropTarget = this.getNativeDragContext();
dropDone(nativeDropTarget, fNativeDropTransfer, isLocal, success, dropAction);
}
// Notify transfer complete - this is an upcall from getNativeData's native calls:
private void newData(long format, byte[] data) {
fNativeDataAvailable = format;
fNativeData = data;
awtLockAccess.notifyAll();
}
// Notify transfer failed - this is an upcall from getNativeData's native calls:
private void transferFailed(long format) {
fNativeDataAvailable = format;
fNativeData = null;
awtLockAccess.notifyAll();
}
// Schedule a native dnd transfer:
private native long startTransfer(long nativeDropTarget, long format);
// Schedule a native dnd data transfer:
private native void addTransfer(long nativeDropTarget, long nativeDropTransfer, long format);
// Notify drop completed:
private native void dropDone(long nativeDropTarget, long nativeDropTransfer, boolean isLocal, boolean success, int dropAction);
}