| /******************************************************************************* |
| * Copyright (c) 2000, 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.ui.views.navigator; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| |
| import org.eclipse.core.resources.IContainer; |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.core.runtime.IAdaptable; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.MultiStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.jface.dialogs.ErrorDialog; |
| import org.eclipse.jface.dialogs.IDialogConstants; |
| import org.eclipse.jface.dialogs.MessageDialog; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.StructuredViewer; |
| import org.eclipse.osgi.util.NLS; |
| 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.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.ui.PlatformUI; |
| import org.eclipse.ui.actions.CopyFilesAndFoldersOperation; |
| import org.eclipse.ui.actions.MoveFilesAndFoldersOperation; |
| import org.eclipse.ui.actions.ReadOnlyStateChecker; |
| import org.eclipse.ui.dialogs.IOverwriteQuery; |
| import org.eclipse.ui.internal.views.navigator.ResourceNavigatorMessages; |
| import org.eclipse.ui.part.PluginDropAdapter; |
| import org.eclipse.ui.part.ResourceTransfer; |
| |
| /** |
| * Implements drop behaviour for drag and drop operations |
| * that land on the resource navigator. |
| * |
| * @since 2.0 |
| */ |
| public class NavigatorDropAdapter extends PluginDropAdapter implements |
| IOverwriteQuery { |
| |
| /** |
| * A flag indicating that overwrites should always occur. |
| */ |
| private boolean alwaysOverwrite = false; |
| |
| /** |
| * The last valid operation. |
| */ |
| private int lastValidOperation = DND.DROP_NONE; |
| |
| /** |
| * Constructs a new drop adapter. |
| * |
| * @param viewer the navigator's viewer |
| */ |
| public NavigatorDropAdapter(StructuredViewer viewer) { |
| super(viewer); |
| } |
| |
| /* |
| * @see org.eclipse.swt.dnd.DropTargetListener#dragEnter(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| public void dragEnter(DropTargetEvent event) { |
| if (FileTransfer.getInstance().isSupportedType(event.currentDataType) |
| && event.detail == DND.DROP_DEFAULT) { |
| // default to copy when dragging from outside Eclipse. Fixes bug 16308. |
| event.detail = DND.DROP_COPY; |
| } |
| super.dragEnter(event); |
| } |
| |
| /** |
| * Returns an error status with the given info. |
| */ |
| private IStatus error(String message) { |
| return error(message, null); |
| } |
| |
| /** |
| * Returns an error status with the given info. |
| */ |
| private IStatus error(String message, Throwable exception) { |
| return new Status(IStatus.ERROR, PlatformUI.PLUGIN_ID, 0, message, |
| exception); |
| } |
| |
| /** |
| * Returns the actual target of the drop, given the resource |
| * under the mouse. If the mouse target is a file, then the drop actually |
| * occurs in its parent. If the drop location is before or after the |
| * mouse target and feedback is enabled, the target is also the parent. |
| */ |
| private IContainer getActualTarget(IResource mouseTarget) { |
| /* if cursor is before or after mouseTarget, set target to parent */ |
| if (getFeedbackEnabled()) { |
| if (getCurrentLocation() == LOCATION_BEFORE |
| || getCurrentLocation() == LOCATION_AFTER) { |
| return mouseTarget.getParent(); |
| } |
| } |
| /* if cursor is on a file, return the parent */ |
| if (mouseTarget.getType() == IResource.FILE) { |
| return mouseTarget.getParent(); |
| } |
| /* otherwise the mouseTarget is the real target */ |
| return (IContainer) mouseTarget; |
| } |
| |
| /** |
| * Returns the display |
| */ |
| private Display getDisplay() { |
| return getViewer().getControl().getDisplay(); |
| } |
| |
| /** |
| * Returns the resource selection from the LocalSelectionTransfer. |
| * |
| * @return the resource selection from the LocalSelectionTransfer |
| */ |
| private IResource[] getSelectedResources() { |
| ArrayList selectedResources = new ArrayList(); |
| |
| ISelection selection = LocalSelectionTransfer.getInstance() |
| .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(o); |
| } |
| else if (o instanceof IAdaptable) { |
| IAdaptable a = (IAdaptable) o; |
| IResource r = (IResource) a.getAdapter(IResource.class); |
| if (r != null) { |
| selectedResources.add(r); |
| } |
| } |
| } |
| } |
| return (IResource[]) selectedResources.toArray(new IResource[selectedResources.size()]); |
| } |
| |
| /** |
| * Returns the shell |
| */ |
| private Shell getShell() { |
| return getViewer().getControl().getShell(); |
| } |
| |
| /** |
| * Returns an error status with the given info. |
| */ |
| private IStatus info(String message) { |
| return new Status(IStatus.INFO, PlatformUI.PLUGIN_ID, 0, message, null); |
| } |
| |
| /** |
| * Adds the given status to the list of problems. Discards |
| * OK statuses. If the status is a multi-status, only its children |
| * are added. |
| */ |
| private void mergeStatus(MultiStatus status, IStatus toMerge) { |
| if (!toMerge.isOK()) { |
| status.merge(toMerge); |
| } |
| } |
| |
| /** |
| * Returns an status indicating success. |
| */ |
| private IStatus ok() { |
| return new Status(IStatus.OK, PlatformUI.PLUGIN_ID, 0, |
| ResourceNavigatorMessages.DropAdapter_ok, null); |
| } |
| |
| /** |
| * Opens an error dialog if necessary. Takes care of |
| * complex rules necessary for making the error dialog look nice. |
| */ |
| private void openError(IStatus status) { |
| if (status == null) |
| return; |
| |
| String genericTitle = ResourceNavigatorMessages.DropAdapter_title; |
| int codes = IStatus.ERROR | IStatus.WARNING; |
| |
| //simple case: one error, not a multistatus |
| if (!status.isMultiStatus()) { |
| ErrorDialog |
| .openError(getShell(), genericTitle, null, status, codes); |
| return; |
| } |
| |
| //one error, single child of multistatus |
| IStatus[] children = status.getChildren(); |
| if (children.length == 1) { |
| ErrorDialog.openError(getShell(), status.getMessage(), null, |
| children[0], codes); |
| return; |
| } |
| //several problems |
| ErrorDialog.openError(getShell(), genericTitle, null, status, codes); |
| } |
| |
| /** |
| * Perform the drop. |
| * @see org.eclipse.swt.dnd.DropTargetListener#drop(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| public boolean performDrop(final Object data) { |
| alwaysOverwrite = false; |
| if (getCurrentTarget() == null || data == null) { |
| return false; |
| } |
| boolean result = false; |
| IStatus status = null; |
| IResource[] resources = null; |
| TransferData currentTransfer = getCurrentTransfer(); |
| if (LocalSelectionTransfer.getInstance().isSupportedType( |
| currentTransfer)) { |
| resources = getSelectedResources(); |
| } else if (ResourceTransfer.getInstance().isSupportedType( |
| currentTransfer)) { |
| resources = (IResource[]) data; |
| } else if (FileTransfer.getInstance().isSupportedType(currentTransfer)) { |
| status = performFileDrop(data); |
| result = status.isOK(); |
| } else { |
| result = NavigatorDropAdapter.super.performDrop(data); |
| } |
| if (resources != null && resources.length > 0) { |
| if (getCurrentOperation() == DND.DROP_COPY) |
| status = performResourceCopy(getShell(), resources); |
| else |
| status = performResourceMove(resources); |
| } |
| openError(status); |
| return result; |
| } |
| |
| /** |
| * Performs a drop using the FileTransfer transfer type. |
| */ |
| private IStatus performFileDrop(Object data) { |
| MultiStatus problems = new MultiStatus(PlatformUI.PLUGIN_ID, 0, |
| ResourceNavigatorMessages.DropAdapter_problemImporting, null); |
| mergeStatus(problems, validateTarget(getCurrentTarget(), |
| getCurrentTransfer())); |
| |
| final IContainer target = getActualTarget((IResource) getCurrentTarget()); |
| final String[] names = (String[]) data; |
| // Run the import operation asynchronously. |
| // Otherwise the drag source (e.g., Windows Explorer) will be blocked |
| // while the operation executes. Fixes bug 16478. |
| Display.getCurrent().asyncExec(new Runnable() { |
| public void run() { |
| getShell().forceActive(); |
| CopyFilesAndFoldersOperation operation = new CopyFilesAndFoldersOperation( |
| getShell()); |
| operation.copyFiles(names, target); |
| } |
| }); |
| return problems; |
| } |
| |
| /** |
| * Performs a resource copy |
| */ |
| private IStatus performResourceCopy(Shell shell, IResource[] sources) { |
| MultiStatus problems = new MultiStatus(PlatformUI.PLUGIN_ID, 1, |
| ResourceNavigatorMessages.DropAdapter_problemsMoving, null); |
| mergeStatus(problems, validateTarget(getCurrentTarget(), |
| getCurrentTransfer())); |
| |
| IContainer target = getActualTarget((IResource) getCurrentTarget()); |
| CopyFilesAndFoldersOperation operation = new CopyFilesAndFoldersOperation( |
| shell); |
| operation.copyResources(sources, target); |
| |
| return problems; |
| } |
| |
| /** |
| * Performs a resource move |
| */ |
| private IStatus performResourceMove(IResource[] sources) { |
| MultiStatus problems = new MultiStatus(PlatformUI.PLUGIN_ID, 1, |
| ResourceNavigatorMessages.DropAdapter_problemsMoving, null); |
| mergeStatus(problems, validateTarget(getCurrentTarget(), |
| getCurrentTransfer())); |
| |
| IContainer target = getActualTarget((IResource) getCurrentTarget()); |
| ReadOnlyStateChecker checker = new ReadOnlyStateChecker( |
| getShell(), |
| ResourceNavigatorMessages.MoveResourceAction_title, |
| ResourceNavigatorMessages.MoveResourceAction_checkMoveMessage); |
| sources = checker.checkReadOnlyResources(sources); |
| MoveFilesAndFoldersOperation operation = new MoveFilesAndFoldersOperation( |
| getShell()); |
| operation.copyResources(sources, target); |
| |
| return problems; |
| } |
| |
| /* |
| * @see org.eclipse.ui.dialogs.IOverwriteQuery#queryOverwrite(java.lang.String) |
| */ |
| public String queryOverwrite(String pathString) { |
| if (alwaysOverwrite) |
| return ALL; |
| |
| final String returnCode[] = { CANCEL }; |
| final String msg = NLS.bind(ResourceNavigatorMessages.DropAdapter_overwriteQuery, pathString); |
| final String[] options = { IDialogConstants.YES_LABEL, |
| IDialogConstants.YES_TO_ALL_LABEL, IDialogConstants.NO_LABEL, |
| IDialogConstants.CANCEL_LABEL }; |
| getDisplay().syncExec(new Runnable() { |
| public void run() { |
| MessageDialog dialog = new MessageDialog( |
| getShell(), |
| ResourceNavigatorMessages.DropAdapter_question, null, msg, MessageDialog.QUESTION, options, 0); |
| dialog.open(); |
| int returnVal = dialog.getReturnCode(); |
| String[] returnCodes = { YES, ALL, NO, CANCEL }; |
| returnCode[0] = returnVal < 0 ? CANCEL : returnCodes[returnVal]; |
| } |
| }); |
| if (returnCode[0] == ALL) |
| alwaysOverwrite = true; |
| return returnCode[0]; |
| } |
| |
| /** |
| * This method is used to notify the action that some aspect of |
| * the drop operation has changed. |
| */ |
| public boolean validateDrop(Object target, int dragOperation, |
| TransferData transferType) { |
| |
| if (dragOperation != DND.DROP_NONE) { |
| lastValidOperation = dragOperation; |
| } |
| if (FileTransfer.getInstance().isSupportedType(transferType) |
| && lastValidOperation != DND.DROP_COPY) { |
| // only allow copying when dragging from outside Eclipse |
| return false; |
| } |
| if (super.validateDrop(target, dragOperation, transferType)) { |
| return true; |
| } |
| return validateTarget(target, transferType).isOK(); |
| } |
| |
| /** |
| * Ensures that the drop target meets certain criteria |
| */ |
| private IStatus validateTarget(Object target, TransferData transferType) { |
| if (!(target instanceof IResource)) { |
| return info(ResourceNavigatorMessages.DropAdapter_targetMustBeResource); |
| } |
| IResource resource = (IResource) target; |
| if (!resource.isAccessible()) { |
| return error(ResourceNavigatorMessages.DropAdapter_canNotDropIntoClosedProject); |
| } |
| IContainer destination = getActualTarget(resource); |
| if (destination.getType() == IResource.ROOT) { |
| return error(ResourceNavigatorMessages.DropAdapter_resourcesCanNotBeSiblings); |
| } |
| String message = null; |
| // drag within Eclipse? |
| if (LocalSelectionTransfer.getInstance().isSupportedType(transferType)) { |
| IResource[] selectedResources = getSelectedResources(); |
| |
| if (selectedResources.length == 0) |
| message = ResourceNavigatorMessages.DropAdapter_dropOperationErrorOther; |
| else { |
| CopyFilesAndFoldersOperation operation; |
| if (lastValidOperation == DND.DROP_COPY) { |
| operation = new CopyFilesAndFoldersOperation(getShell()); |
| } else { |
| operation = new MoveFilesAndFoldersOperation(getShell()); |
| } |
| message = operation.validateDestination(destination, |
| selectedResources); |
| } |
| } // file import? |
| else if (FileTransfer.getInstance().isSupportedType(transferType)) { |
| String[] sourceNames = (String[]) FileTransfer.getInstance() |
| .nativeToJava(transferType); |
| if (sourceNames == null) { |
| // source names will be null on Linux. Use empty names to do destination validation. |
| // Fixes bug 29778 |
| sourceNames = new String[0]; |
| } |
| CopyFilesAndFoldersOperation copyOperation = new CopyFilesAndFoldersOperation( |
| getShell()); |
| message = copyOperation.validateImportDestination(destination, |
| sourceNames); |
| } |
| if (message != null) { |
| return error(message); |
| } |
| return ok(); |
| } |
| } |
