/*******************************************************************************
* Copyright (c) 2009 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
* Zend Technologies
*******************************************************************************/
package org.eclipse.php.internal.ui.dnd;
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.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.php.internal.ui.actions.IPHPMoveActionDelegator;
import org.eclipse.swt.dnd.DND;
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.internal.views.navigator.ResourceNavigatorMessages;
import org.eclipse.ui.part.ResourceTransfer;
import org.eclipse.ui.views.navigator.LocalSelectionTransfer;
import org.eclipse.ui.views.navigator.NavigatorDropAdapter;
/**
* Implements drop behaviour for drag and drop operations that land on the
* resource navigator.
*
* @since 2.0
*/
public class PHPNavigatorDropAdapter extends NavigatorDropAdapter {
/**
* A flag indicating that overwrites should always occur.
*/
private boolean alwaysOverwrite = false;
/**
* The last valid operation.
*/
private int lastValidOperation = DND.DROP_NONE;
private IPHPMoveActionDelegator fReorgMoveAction;
private static final String MOVE_ACTION_ID = "org.eclipse.php.ui.actions.Move"; //$NON-NLS-1$
/**
* Constructs a new drop adapter.
*
* @param viewer
* the navigator's viewer
*/
public PHPNavigatorDropAdapter(StructuredViewer viewer) {
super(viewer);
// fReorgMoveAction
// =(IPHPMoveActionDelegator)PHPActionDelegatorRegistry.getActionDelegator(MOVE_ACTION_ID);
}
/**
* 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 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 = PHPNavigatorDropAdapter.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);
fReorgMoveAction.setSources(sources);
fReorgMoveAction.setTarget(target);
ISelection selection = LocalSelectionTransfer.getInstance()
.getSelection();
if (selection instanceof IStructuredSelection) {
// fReorgMoveAction.setSelection((StructuredSelection) selection);
fReorgMoveAction.runDrop((IStructuredSelection) selection);
}
return problems;
}
/**
* 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();
}
}