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/*******************************************************************************
* Copyright (c) 2004 - 2006 University Of British Columbia 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:
* University Of British Columbia - initial API and implementation
*******************************************************************************/
package org.eclipse.mylar.internal.tasklist.ui.views;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerDropAdapter;
import org.eclipse.mylar.core.util.MylarStatusHandler;
import org.eclipse.mylar.internal.tasklist.MylarTaskListPlugin;
import org.eclipse.mylar.internal.tasklist.Task;
import org.eclipse.mylar.internal.tasklist.TaskCategory;
import org.eclipse.mylar.internal.tasklist.ui.ITaskListElement;
import org.eclipse.mylar.tasklist.IQueryHit;
import org.eclipse.mylar.tasklist.ITask;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.TransferData;
/**
* @author Mik Kersten
* @author Robert Elves (added URL based task creation support)
*/
public class TaskListDropAdapter extends ViewerDropAdapter {
private Task newTask = null;
public TaskListDropAdapter(Viewer viewer) {
super(viewer);
setFeedbackEnabled(true);
}
@Override
public boolean performDrop(Object data) {
Object currentTarget = getCurrentTarget();
List<ITask> tasksToMove = new ArrayList<ITask>();
if (isUrl(data) && createTaskFromUrl(data)) {
tasksToMove.add(newTask);
} else {
ISelection selection = ((TreeViewer) getViewer()).getSelection();
for (Object selectedObject : ((IStructuredSelection) selection).toList()) {
ITask toMove = null;
if (selectedObject instanceof ITask) {
toMove = (ITask) selectedObject;
} else if (selectedObject instanceof IQueryHit) {
toMove = ((IQueryHit) selectedObject).getOrCreateCorrespondingTask();
}
if (toMove != null) {
tasksToMove.add(toMove);
}
}
}
for (ITask task : tasksToMove) {
if (currentTarget instanceof TaskCategory) {
MylarTaskListPlugin.getTaskListManager().moveToCategory((TaskCategory) currentTarget, task);
} else if (currentTarget instanceof ITask) {
ITask targetTask = (ITask) currentTarget;
if (targetTask.getCategory() == null) {
MylarTaskListPlugin.getTaskListManager().moveToRoot(task);
} else {
MylarTaskListPlugin.getTaskListManager().moveToCategory((TaskCategory) targetTask.getCategory(),
task);
}
} else if (currentTarget == null) {
MylarTaskListPlugin.getTaskListManager().moveToRoot(newTask);
}
}
// Make new task the current selection in the view
if (newTask != null) {
StructuredSelection ss = new StructuredSelection(newTask);
getViewer().setSelection(ss);
getViewer().refresh();
}
return true;
}
/**
* @return true if string is a http(s) url
*/
public boolean isUrl(Object data) {
String uri = "";
if (data instanceof String) {
uri = (String) data;
if ((uri.startsWith("http://") || uri.startsWith("https://"))) {
return true;
}
}
return false;
}
/**
* @param data
* string containing url and title separated by <quote>\n</quote>
* @return true if task succesfully created, false otherwise
*/
public boolean createTaskFromUrl(Object data) {
if (!(data instanceof String))
return false;
String[] urlTransfer = ((String) data).split("\n");
String url = "";
String urlTitle = "<retrieving from URL>";
if (urlTransfer.length > 0) {
url = urlTransfer[0];
} else {
return false;
}
// Removed in order to default to retrieving title from url rather than
// accepting what was sent by the brower's DnD code. (see bug 114401)
// If a Title is provided, use it.
// if (urlTransfer.length > 1) {
// urlTitle = urlTransfer[1];
// }
// if (urlTransfer.length < 2) { // no title provided
// retrieveTaskDescription(url);
// }
retrieveTaskDescription(url);
newTask = new Task(MylarTaskListPlugin.getTaskListManager().genUniqueTaskHandle(), urlTitle, true);
if (newTask == null) {
return false;
}
newTask.setPriority(MylarTaskListPlugin.PriorityLevel.P3.toString());
newTask.setUrl(url);
newTask.openTaskInEditor(true);
return true;
}
@Override
public boolean validateDrop(Object targetObject, int operation, TransferData transferType) {
Object selectedObject = ((IStructuredSelection) ((TreeViewer) getViewer()).getSelection()).getFirstElement();
if (selectedObject instanceof ITaskListElement && ((ITaskListElement) selectedObject).isDragAndDropEnabled()) {
if (getCurrentTarget() instanceof TaskCategory) {
return true;
} else if (getCurrentTarget() instanceof ITaskListElement
&& (getCurrentLocation() == ViewerDropAdapter.LOCATION_AFTER || getCurrentLocation() == ViewerDropAdapter.LOCATION_BEFORE)) {
return true;
} else {
return false;
}
}
return TextTransfer.getInstance().isSupportedType(transferType);
}
/**
* Attempts to set the task pageTitle to the title from the specified url
*/
protected void retrieveTaskDescription(final String url) {
try {
RetrieveTitleFromUrlJob job = new RetrieveTitleFromUrlJob(url) {
@Override
protected void setTitle(final String pageTitle) {
newTask.setDescription(pageTitle);
MylarTaskListPlugin.getTaskListManager().notifyTaskChanged(newTask);
}
};
job.schedule();
} catch (RuntimeException e) {
MylarStatusHandler.fail(e, "could not open task web page", false);
}
}
}
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