| /******************************************************************************* |
| * Copyright (c) 2006 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.ui.navigator.resources; |
| |
| import java.util.Iterator; |
| import java.util.LinkedHashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.core.runtime.IAdaptable; |
| import org.eclipse.core.runtime.IPath; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.swt.dnd.DragSourceEvent; |
| import org.eclipse.swt.dnd.FileTransfer; |
| import org.eclipse.swt.dnd.Transfer; |
| import org.eclipse.ui.navigator.CommonDragAdapterAssistant; |
| import org.eclipse.ui.navigator.INavigatorDnDService; |
| import org.eclipse.ui.part.ResourceTransfer; |
| import org.eclipse.ui.views.navigator.LocalSelectionTransfer; |
| |
| /** |
| * Clients may reference this class in the <b>dragAssistant</b> element of a |
| * <b>org.eclipse.ui.navigator.viewer</b> extension point. |
| * |
| * <p> |
| * Clients may not extend or instantiate this class for any purpose other than |
| * {@link INavigatorDnDService#bindDragAssistant(CommonDragAdapterAssistant)}. |
| * Clients may have no direct dependencies on the contract of this class. |
| * </p> |
| * |
| * @since 3.2 |
| * |
| */ |
| public final class ResourceDragAdapterAssistant extends |
| CommonDragAdapterAssistant { |
| |
| private static final boolean DEBUG = false; |
| |
| private static final Transfer[] SUPPORTED_TRANSFERS = new Transfer[] { |
| ResourceTransfer.getInstance(), |
| LocalSelectionTransfer.getInstance(), FileTransfer.getInstance() }; |
| |
| private static final Class IRESOURCE_TYPE = IResource.class; |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.navigator.CommonDragAdapterAssistant#getSupportedTransferTypes() |
| */ |
| public Transfer[] getSupportedTransferTypes() { |
| return SUPPORTED_TRANSFERS; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.ui.navigator.CommonDragAdapterAssistant#setDragData(org.eclipse.swt.dnd.DragSourceEvent, |
| * org.eclipse.jface.viewers.IStructuredSelection) |
| */ |
| public boolean setDragData(DragSourceEvent anEvent, |
| IStructuredSelection aSelection) { |
| |
| if (LocalSelectionTransfer.getInstance().isSupportedType( |
| anEvent.dataType)) { |
| anEvent.data = aSelection; |
| if (DEBUG) { |
| System.out |
| .println("ResourceDragAdapterAssistant.dragSetData set LocalSelectionTransfer"); //$NON-NLS-1$ |
| } |
| return true; |
| } else if (ResourceTransfer.getInstance().isSupportedType( |
| anEvent.dataType)) { |
| anEvent.data = getSelectedResources(aSelection); |
| if (DEBUG) { |
| System.out |
| .println("ResourceDragAdapterAssistant.dragSetData set ResourceTransfer"); //$NON-NLS-1$ |
| } |
| return true; |
| } else if (FileTransfer.getInstance().isSupportedType(anEvent.dataType)) { |
| |
| IResource[] resources = getSelectedResources(aSelection); |
| |
| // Get the path of each file and set as the drag data |
| final int length = resources.length; |
| int actualLength = 0; |
| String[] fileNames = new String[length]; |
| for (int i = 0; i < length; i++) { |
| IPath location = resources[i].getLocation(); |
| // location may be null. See bug 29491. |
| if (location != null) { |
| fileNames[actualLength++] = location.toOSString(); |
| } |
| } |
| if (actualLength > 0) { |
| // was one or more of the locations null? |
| if (actualLength < length) { |
| String[] tempFileNames = fileNames; |
| fileNames = new String[actualLength]; |
| for (int i = 0; i < actualLength; i++) |
| fileNames[i] = tempFileNames[i]; |
| } |
| anEvent.data = fileNames; |
| |
| if (DEBUG) |
| System.out |
| .println("ResourceDragAdapterAssistant.dragSetData set FileTransfer"); //$NON-NLS-1$ |
| return true; |
| } |
| } |
| return false; |
| |
| } |
| |
| private IResource[] getSelectedResources(IStructuredSelection aSelection) { |
| Set resources = new LinkedHashSet(); |
| IResource resource = null; |
| for (Iterator iter = aSelection.iterator(); iter.hasNext();) { |
| Object selected = iter.next(); |
| resource = adaptToResource(selected); |
| if (resource != null) { |
| resources.add(resource); |
| } |
| } |
| return (IResource[]) resources.toArray(new IResource[resources.size()]); |
| } |
| |
| private IResource adaptToResource(Object selected) { |
| IResource resource; |
| if (selected instanceof IResource) { |
| resource = (IResource) selected; |
| } else if (selected instanceof IAdaptable) { |
| resource = (IResource) ((IAdaptable) selected) |
| .getAdapter(IRESOURCE_TYPE); |
| } else { |
| resource = (IResource) Platform.getAdapterManager().getAdapter( |
| selected, IRESOURCE_TYPE); |
| } |
| return resource; |
| } |
| |
| } |