| /******************************************************************************* |
| * Copyright (c) 2000, 2017 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 |
| * |
| *******************************************************************************/ |
| package org.eclipse.dltk.internal.ui.dnd; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IAdaptable; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.MultiStatus; |
| import org.eclipse.dltk.core.IModelElement; |
| import org.eclipse.dltk.core.IModelStatusConstants; |
| import org.eclipse.dltk.internal.ui.DLTKUIMessages; |
| import org.eclipse.dltk.internal.ui.util.SWTUtil; |
| import org.eclipse.dltk.ui.DLTKUIPlugin; |
| import org.eclipse.jface.dialogs.ErrorDialog; |
| import org.eclipse.jface.util.TransferDragSourceListener; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.ISelectionProvider; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.swt.dnd.DND; |
| import org.eclipse.swt.dnd.DragSourceAdapter; |
| import org.eclipse.swt.dnd.DragSourceEvent; |
| import org.eclipse.swt.dnd.Transfer; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.ui.part.ResourceTransfer; |
| |
| /** |
| * A drag adapter that transfers the current selection as </code> |
| * IResource</code>. Only those elements in the selection are part of the |
| * transfer which can be converted into an <code>IResource |
| * </code>. |
| */ |
| public class ResourceTransferDragAdapter extends DragSourceAdapter |
| implements TransferDragSourceListener { |
| |
| private ISelectionProvider fProvider; |
| |
| /** |
| * Creates a new ResourceTransferDragAdapter for the given selection |
| * provider. |
| * |
| * @param provider |
| * the selection provider to access the viewer's selection |
| */ |
| public ResourceTransferDragAdapter(ISelectionProvider provider) { |
| fProvider = provider; |
| } |
| |
| @Override |
| public Transfer getTransfer() { |
| return ResourceTransfer.getInstance(); |
| } |
| |
| @Override |
| public void dragStart(DragSourceEvent event) { |
| event.doit = convertSelection().size() > 0; |
| } |
| |
| @Override |
| public void dragSetData(DragSourceEvent event) { |
| List<IResource> resources = convertSelection(); |
| event.data = resources.toArray(new IResource[resources.size()]); |
| } |
| |
| @Override |
| public void dragFinished(DragSourceEvent event) { |
| if (!event.doit) |
| return; |
| |
| if (event.detail == DND.DROP_MOVE) { |
| handleFinishedDropMove(event); |
| } |
| } |
| |
| private List<IResource> convertSelection() { |
| ISelection s = fProvider.getSelection(); |
| if (!(s instanceof IStructuredSelection)) |
| return Collections.emptyList(); |
| IStructuredSelection selection = (IStructuredSelection) s; |
| List<IResource> result = new ArrayList<>(selection.size()); |
| for (Iterator iter = selection.iterator(); iter.hasNext();) { |
| Object element = iter.next(); |
| IResource resource = null; |
| if (element instanceof IModelElement) { |
| // don't use IAdaptable as for members only the top level type |
| // adapts |
| resource = ((IModelElement) element).getResource(); |
| } else if (element instanceof IAdaptable) { |
| resource = ((IAdaptable) element).getAdapter(IResource.class); |
| } |
| if (resource != null) |
| result.add(resource); |
| } |
| return result; |
| } |
| |
| private void handleFinishedDropMove(DragSourceEvent event) { |
| MultiStatus status = new MultiStatus(DLTKUIPlugin.PLUGIN_ID, |
| IModelStatusConstants.INTERNAL_ERROR, |
| DLTKUIMessages.ResourceTransferDragAdapter_cannot_delete_resource, |
| null); |
| List<IResource> resources = convertSelection(); |
| for (Iterator<IResource> iter = resources.iterator(); iter.hasNext();) { |
| IResource resource = iter.next(); |
| try { |
| resource.delete(true, null); |
| } catch (CoreException e) { |
| status.add(e.getStatus()); |
| } |
| } |
| if (status.getChildren().length > 0) { |
| Shell parent = SWTUtil.getShell(event.widget); |
| ErrorDialog error = new ErrorDialog(parent, |
| DLTKUIMessages.ResourceTransferDragAdapter_moving_resource, |
| DLTKUIMessages.ResourceTransferDragAdapter_cannot_delete_files, |
| status, IStatus.ERROR); |
| error.open(); |
| } |
| } |
| } |