| /****************************************************************************** |
| * Copyright (c) 2005 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.gmf.runtime.common.ui.services.dnd.ide.drop; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| 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.FileTransfer; |
| import org.eclipse.swt.dnd.TransferData; |
| import org.eclipse.ui.views.navigator.NavigatorDropAdapter; |
| |
| import org.eclipse.gmf.runtime.common.core.command.ICommand; |
| import org.eclipse.gmf.runtime.common.ui.services.dnd.core.ITransferAgent; |
| import org.eclipse.gmf.runtime.common.ui.services.dnd.core.TransferId; |
| import org.eclipse.gmf.runtime.common.ui.services.dnd.drop.IDropTargetContext; |
| import org.eclipse.gmf.runtime.common.ui.services.dnd.drop.IDropTargetEvent; |
| import org.eclipse.gmf.runtime.common.ui.services.dnd.drop.IDropTargetListener; |
| import org.eclipse.gmf.runtime.common.ui.services.dnd.ide.core.IDETransferId; |
| |
| /** |
| * Concrete class that implements the IDropTargetListener. This class handles |
| * dropping resource elements. |
| * |
| * @author ldamus |
| */ |
| public class ResourceDropTargetListener |
| extends NavigatorDropAdapter |
| implements IDropTargetListener { |
| |
| /** |
| * Constructs a new drop listener for the given viewer. |
| * |
| * @param viewer |
| * the viewer |
| */ |
| public ResourceDropTargetListener(StructuredViewer viewer) { |
| super(viewer); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.IDropTargetListener#getExecutableContext(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| public ICommand getExecutableContext(DropTargetEvent event) { |
| return null; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.IDropTargetListener#canSupport(org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.IDropTargetContext, |
| * org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.IDropTargetEvent, |
| * org.eclipse.gmf.runtime.common.ui.internal.dnd.ITransferAgent) |
| */ |
| public boolean canSupport(IDropTargetContext context, |
| IDropTargetEvent currentEvent, ITransferAgent currentAgent) { |
| |
| Object target = context.getCurrentTarget(); |
| return (target instanceof IResource) |
| || ((target instanceof IAdaptable) && ((IAdaptable) target) |
| .getAdapter(IResource.class) != null); |
| |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.IDropTargetListener#setFeedback(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| public void setFeedback(DropTargetEvent event) { |
| |
| if (FileTransfer.getInstance().isSupportedType(event.currentDataType)) |
| // if dropping a file, make a copy gesture instead of move |
| if ((event.operations & DND.DROP_COPY) != 0) { |
| event.detail = DND.DROP_COPY; |
| } else { |
| event.detail = DND.DROP_NONE; |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.IDropTargetListener#getSupportingTransferIds() |
| */ |
| public String[] getSupportingTransferIds() { |
| return new String[] {IDETransferId.NAV_SELECTION_TRANSFER, |
| TransferId.FILE_TRANSFER}; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.swt.dnd.DropTargetListener#dropAccept(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| public void dropAccept(DropTargetEvent event) { |
| Object target = getCurrentTarget(); |
| if (!(target instanceof IResource)) { |
| if (target instanceof IAdaptable) { |
| target = ((IAdaptable) target).getAdapter(IResource.class); |
| } |
| } |
| if (!validateDrop(target, event.detail, event.currentDataType)) { |
| event.detail = DND.DROP_NONE; |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.views.navigator.NavigatorDropAdapter#validateDrop(java.lang.Object, |
| * int, org.eclipse.swt.dnd.TransferData) |
| */ |
| public boolean validateDrop(Object target, int dragOperation, |
| TransferData transferType) { |
| // adapt the target to IResource if necessary |
| Object adaptedTarget = target; |
| if (!(adaptedTarget instanceof IResource)) { |
| if (adaptedTarget instanceof IAdaptable) { |
| adaptedTarget = ((IAdaptable) target) |
| .getAdapter(IResource.class); |
| } |
| } |
| |
| if (LocalSelectionTransfer.getTransfer().isSupportedType(transferType)) { |
| // validate that the source is IResource, otherwise superclass's |
| // call fails |
| ISelection selection = LocalSelectionTransfer.getTransfer() |
| .getSelection(); |
| if (selection instanceof IStructuredSelection) { |
| List selectionList = ((IStructuredSelection) selection) |
| .toList(); |
| Iterator i = selectionList.iterator(); |
| while (i.hasNext()) { |
| if (!(i.next() instanceof IResource)) { |
| return false; |
| } |
| } |
| } |
| } |
| |
| return super.validateDrop(adaptedTarget, dragOperation, transferType); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.ViewerDropAdapter#getCurrentTarget() |
| */ |
| protected Object getCurrentTarget() { |
| Object target = super.getCurrentTarget(); |
| if (!(target instanceof IResource)) { |
| if (target instanceof IAdaptable) { |
| target = ((IAdaptable) target).getAdapter(IResource.class); |
| } |
| } |
| return target; |
| } |
| |
| } |