/*******************************************************************************
* Copyright (c) 2000, 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.jsdt.internal.ui.packageview;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IResource;
import org.eclipse.jface.util.TransferDropTargetListener;
import org.eclipse.jface.viewers.AbstractTreeViewer;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.FileTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.actions.CopyFilesAndFoldersOperation;
import org.eclipse.wst.jsdt.core.IJavaScriptElement;
import org.eclipse.wst.jsdt.core.IJavaScriptProject;
import org.eclipse.wst.jsdt.core.IPackageFragment;
import org.eclipse.wst.jsdt.core.IPackageFragmentRoot;
import org.eclipse.wst.jsdt.core.JavaScriptModelException;
import org.eclipse.wst.jsdt.internal.corext.util.Resources;
import org.eclipse.wst.jsdt.internal.ui.dnd.JdtViewerDropAdapter;
import org.eclipse.wst.jsdt.internal.ui.util.ExceptionHandler;
/**
* Adapter to handle file drop from other applications.
*/
class FileTransferDropAdapter extends JdtViewerDropAdapter implements TransferDropTargetListener {
FileTransferDropAdapter(AbstractTreeViewer viewer) {
super(viewer, DND.FEEDBACK_SCROLL | DND.FEEDBACK_EXPAND);
}
//---- TransferDropTargetListener interface ---------------------------------------
public Transfer getTransfer() {
return FileTransfer.getInstance();
}
public boolean isEnabled(DropTargetEvent event) {
Object target= event.item != null ? event.item.getData() : null;
if (target == null)
return false;
return target instanceof IJavaScriptElement || target instanceof IResource;
}
//---- Actual DND -----------------------------------------------------------------
public void validateDrop(Object target, DropTargetEvent event, int operation) {
event.detail= DND.DROP_NONE;
boolean isPackageFragment= target instanceof IPackageFragment;
boolean isJavaProject= target instanceof IJavaScriptProject;
boolean isPackageFragmentRoot= target instanceof IPackageFragmentRoot;
boolean isContainer= target instanceof IContainer;
if (!(isPackageFragment || isJavaProject || isPackageFragmentRoot || isContainer))
return;
if (isContainer) {
IContainer container= (IContainer)target;
if (container.isAccessible() && !Resources.isReadOnly(container))
event.detail= DND.DROP_COPY;
} else {
IJavaScriptElement element= (IJavaScriptElement)target;
if (!element.isReadOnly())
event.detail= DND.DROP_COPY;
}
return;
}
public void drop(Object dropTarget, final DropTargetEvent event) {
try {
int operation= event.detail;
event.detail= DND.DROP_NONE;
final Object data= event.data;
if (data == null || !(data instanceof String[]) || operation != DND.DROP_COPY)
return;
final IContainer target= getActualTarget(dropTarget);
if (target == null)
return;
// Run the import operation asynchronously.
// Otherwise the drag source (e.g., Windows Explorer) will be blocked
// while the operation executes. Fixes bug 35796.
Display.getCurrent().asyncExec(new Runnable() {
public void run() {
getShell().forceActive();
new CopyFilesAndFoldersOperation(getShell()).copyFiles((String[]) data, target);
// Import always performs a copy.
event.detail= DND.DROP_COPY;
}
});
} catch (JavaScriptModelException e) {
String title= PackagesMessages.DropAdapter_errorTitle;
String message= PackagesMessages.DropAdapter_errorMessage;
ExceptionHandler.handle(e, getShell(), title, message);
}
}
private IContainer getActualTarget(Object dropTarget) throws JavaScriptModelException{
if (dropTarget instanceof IContainer)
return (IContainer)dropTarget;
else if (dropTarget instanceof IJavaScriptElement)
return getActualTarget(((IJavaScriptElement)dropTarget).getCorrespondingResource());
return null;
}
private Shell getShell() {
return getViewer().getControl().getShell();
}
}