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/*******************************************************************************
* Copyright (c) 2004, 2012 Tasktop Technologies 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:
* Tasktop Technologies - initial API and implementation
* Maarten Meijer - improvements
* Robert Munteanu - fix for bug 359539
*******************************************************************************/
package org.eclipse.mylyn.internal.tasks.ui.editors;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.dialogs.IMessageProvider;
import org.eclipse.jface.util.LocalSelectionTransfer;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.mylyn.internal.tasks.core.data.FileTaskAttachmentSource;
import org.eclipse.mylyn.internal.tasks.core.data.TextTaskAttachmentSource;
import org.eclipse.mylyn.internal.tasks.ui.util.TasksUiInternal;
import org.eclipse.mylyn.internal.tasks.ui.wizards.NewAttachmentWizardDialog;
import org.eclipse.mylyn.tasks.core.ITask;
import org.eclipse.mylyn.tasks.ui.TaskDropListener.Operation;
import org.eclipse.mylyn.tasks.ui.editors.AbstractTaskEditorPage;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.DropTargetListener;
import org.eclipse.swt.dnd.FileTransfer;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.TransferData;
/**
* @author Mik Kersten
* @author Maarten Meijer
* @author Steffen Pingel
*/
public class TaskAttachmentDropListener implements DropTargetListener {
private final AbstractTaskEditorPage page;
public TaskAttachmentDropListener(AbstractTaskEditorPage page) {
this.page = page;
}
public void dragEnter(DropTargetEvent event) {
if (event.detail == DND.DROP_DEFAULT) {
if ((event.operations & DND.DROP_COPY) != 0) {
event.detail = DND.DROP_COPY;
} else {
event.detail = DND.DROP_NONE;
}
}
// will accept text but prefer to have files dropped
for (TransferData dataType : event.dataTypes) {
if (LocalSelectionTransfer.getTransfer().isSupportedType(dataType)
|| FileTransfer.getInstance().isSupportedType(dataType)) {
event.currentDataType = dataType;
// files and tasks should only be copied
if (event.detail != DND.DROP_COPY) {
event.detail = DND.DROP_NONE;
}
break;
}
}
}
public void dragOver(DropTargetEvent event) {
event.feedback = DND.FEEDBACK_SELECT | DND.FEEDBACK_SCROLL;
}
public void dragOperationChanged(DropTargetEvent event) {
if ((event.detail == DND.DROP_DEFAULT) || (event.operations & DND.DROP_COPY) != 0) {
event.detail = DND.DROP_COPY;
} else {
event.detail = DND.DROP_NONE;
}
// allow text to be moved but files should only be copied
if (FileTransfer.getInstance().isSupportedType(event.currentDataType)) {
if (event.detail != DND.DROP_COPY) {
event.detail = DND.DROP_NONE;
}
}
}
public void dragLeave(DropTargetEvent event) {
}
public void dropAccept(DropTargetEvent event) {
}
public void drop(DropTargetEvent event) {
if (LocalSelectionTransfer.getTransfer().isSupportedType(event.currentDataType)) {
TasksUiInternal.getTaskDropHandler().loadTaskDropListeners();
ISelection selection = LocalSelectionTransfer.getTransfer().getSelection();
List<ITask> tasksToMove = TasksUiInternal.getTasksFromSelection(selection);
if (!tasksToMove.isEmpty()) {
TasksUiInternal.getTaskDropHandler().fireTaskDropped(tasksToMove, page.getTask(),
Operation.DROP_ON_TASK_EDITOR);
} else {
attachFirstFile(getFilesFromSelection(selection));
}
}
if (TextTransfer.getInstance().isSupportedType(event.currentDataType)) {
String text = (String) event.data;
EditorUtil.openNewAttachmentWizard(page, null, new TextTaskAttachmentSource(text));
}
if (FileTransfer.getInstance().isSupportedType(event.currentDataType)) {
String[] files = (String[]) event.data;
attachFirstFile(files);
}
}
protected void attachFirstFile(String[] files) {
if (files != null && files.length > 0) {
File file = new File(files[0]);
NewAttachmentWizardDialog dialog = EditorUtil.openNewAttachmentWizard(page, null,
new FileTaskAttachmentSource(file));
if (files.length > 1) {
dialog.setMessage(
Messages.TaskAttachmentDropListener_Note_that_only_the_first_file_dragged_will_be_attached,
IMessageProvider.WARNING);
}
}
}
public static String[] getFilesFromSelection(ISelection selection) {
List<String> files = new ArrayList<String>();
if (selection instanceof IStructuredSelection) {
for (Object element : ((IStructuredSelection) selection).toList()) {
IResource resource = null;
if (element instanceof IResource) {
resource = (IResource) element;
} else if (element instanceof IAdaptable) {
IAdaptable adaptable = (IAdaptable) element;
resource = (IResource) adaptable.getAdapter(IResource.class);
}
if (resource != null && resource.getRawLocation() != null) {
files.add(resource.getRawLocation().toOSString());
}
}
}
return files.toArray(new String[files.size()]);
}
}
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