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/*******************************************************************************
* Copyright (c) 2002, 2015 QNX Software Systems and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* QNX Software Systems - Initial API and implementation
* Anton Leherbauer (Wind River Systems) - 151571 DND move on GTK
*******************************************************************************/
package org.eclipse.cdt.internal.ui.dnd;
import java.util.ArrayList;
import java.util.Iterator;
import org.eclipse.cdt.core.model.ICElement;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.util.LocalSelectionTransfer;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.actions.CopyFilesAndFoldersOperation;
import org.eclipse.ui.actions.MoveFilesAndFoldersOperation;
import org.eclipse.ui.actions.ReadOnlyStateChecker;
import org.eclipse.ui.part.ResourceTransfer;
/**
* ResourceTransferDropAdapter
*/
public class ResourceTransferDropAdapter extends CDTViewerDropAdapter implements TransferDropTargetListener {
/**
* @param viewer
*/
public ResourceTransferDropAdapter(StructuredViewer viewer) {
super(viewer, DND.FEEDBACK_SCROLL | DND.FEEDBACK_EXPAND);
}
/* (non-Javadoc)
* @see org.eclipse.cdt.internal.ui.drag.TransferDropTargetListener#getTransfer()
*/
@Override
public Transfer getTransfer() {
return ResourceTransfer.getInstance();
}
/* (non-Javadoc)
* @see org.eclipse.cdt.internal.ui.drag.TransferDropTargetListener#isEnabled(org.eclipse.swt.dnd.DropTargetEvent)
*/
@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;
}
@Override
public void validateDrop(Object target, DropTargetEvent event, int op) {
IContainer destination = getDestination(target);
if (destination == null) {
event.detail = DND.DROP_NONE;
} else {
IResource[] selectedResources = getSelectedResources();
if (selectedResources.length == 0) {
event.detail = DND.DROP_NONE;
} else {
if (op == DND.DROP_COPY) {
CopyFilesAndFoldersOperation operation = new CopyFilesAndFoldersOperation(getShell());
if (operation.validateDestination(destination, selectedResources) == null) {
event.detail = op;
}
} else {
MoveFilesAndFoldersOperation operation = new MoveFilesAndFoldersOperation(getShell());
if (operation.validateDestination(destination, selectedResources) == null) {
event.detail = DND.DROP_MOVE;
}
}
}
}
}
@Override
public void drop(Object dropTarget, final DropTargetEvent event) {
int op = event.detail;
event.detail = DND.DROP_NONE;
final Object data = event.data;
if (data == null || !(data instanceof IResource[]))
return;
final IContainer target = getDestination(dropTarget);
if (target == null) {
return;
}
IResource[] sources = (IResource[]) data;
if (op == DND.DROP_COPY) {
CopyFilesAndFoldersOperation operation = new CopyFilesAndFoldersOperation(getShell());
operation.copyResources(sources, target);
} else {
ReadOnlyStateChecker checker = new ReadOnlyStateChecker(getShell(), "Move Resource Action", //$NON-NLS-1$
"Move Resource Action");//$NON-NLS-1$
sources = checker.checkReadOnlyResources(sources);
MoveFilesAndFoldersOperation operation = new MoveFilesAndFoldersOperation(getShell());
operation.copyResources(sources, target);
}
}
private IContainer getDestination(Object dropTarget) {
if (dropTarget instanceof IContainer) {
return (IContainer) dropTarget;
} else if (dropTarget instanceof ICElement) {
return getDestination(((ICElement) dropTarget).getResource());
}
return null;
}
/**
* Returns the resource selection from the LocalSelectionTransfer.
*
* @return the resource selection from the LocalSelectionTransfer
*/
private IResource[] getSelectedResources() {
ArrayList<IResource> selectedResources = new ArrayList<IResource>();
ISelection selection = LocalSelectionTransfer.getTransfer().getSelection();
if (selection instanceof IStructuredSelection) {
IStructuredSelection ssel = (IStructuredSelection) selection;
for (Iterator<?> i = ssel.iterator(); i.hasNext();) {
Object o = i.next();
if (o instanceof IResource) {
selectedResources.add((IResource) o);
} else if (o instanceof IAdaptable) {
IAdaptable a = (IAdaptable) o;
IResource r = a.getAdapter(IResource.class);
if (r != null) {
selectedResources.add(r);
}
}
}
}
return selectedResources.toArray(new IResource[selectedResources.size()]);
}
/**
* Returns the shell
*/
protected Shell getShell() {
return getViewer().getControl().getShell();
}
}
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