/*******************************************************************************
* Copyright (c) 2002, 2012 QNX Software Systems 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:
* QNX Software Systems - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.ui.dnd;
import org.eclipse.cdt.core.model.ICElement;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourceAttributes;
import org.eclipse.core.runtime.IAdaptable;
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;
/**
* FileTransferDropAdapter
*/
public class FileTransferDropAdapter extends CDTViewerDropAdapter implements TransferDropTargetListener {
public FileTransferDropAdapter(AbstractTreeViewer viewer) {
super(viewer, DND.FEEDBACK_SCROLL | DND.FEEDBACK_EXPAND);
}
//---- TransferDropTargetListener interface ---------------------------------------
@Override
public Transfer getTransfer() {
return FileTransfer.getInstance();
}
@Override
public boolean isEnabled(DropTargetEvent event) {
Object target= event.item != null ? event.item.getData() : null;
if (target == null) {
return false;
}
return target instanceof ICElement || target instanceof IResource;
}
//---- Actual DND -----------------------------------------------------------------
@Override
public void validateDrop(Object target, DropTargetEvent event, int operation) {
event.detail= DND.DROP_NONE;
boolean isContainer = false;
if (target instanceof IContainer) {
isContainer = true;
} else if (target instanceof IAdaptable) {
target = ((IAdaptable)target).getAdapter(IResource.class);
isContainer = target instanceof IContainer;
}
if (isContainer) {
IContainer container= (IContainer)target;
if (container.isAccessible()) {
ResourceAttributes attributes = container.getResourceAttributes();
if (attributes != null && !attributes.isReadOnly()) {
event.detail= DND.DROP_COPY;
}
}
}
}
@Override
public void drop(Object dropTarget, final DropTargetEvent event) {
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() {
@Override
public void run() {
getShell().forceActive();
new CopyFilesAndFoldersOperation(getShell()).copyFiles((String[]) data, target);
// Import always performs a copy.
event.detail= DND.DROP_COPY;
}
});
}
private IContainer getActualTarget(Object dropTarget) {
if (dropTarget instanceof IContainer) {
return (IContainer)dropTarget;
} else if (dropTarget instanceof ICElement) {
return getActualTarget(((ICElement)dropTarget).getResource());
}
return null;
}
Shell getShell() {
return getViewer().getControl().getShell();
}
}