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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.tasks.ui.views;
import java.io.File;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.jface.dialogs.MessageDialog;
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.context.core.ContextCorePlugin;
import org.eclipse.mylar.core.MylarStatusHandler;
import org.eclipse.mylar.internal.tasks.ui.ITasksUiConstants;
import org.eclipse.mylar.internal.tasks.ui.RetrieveTitleFromUrlJob;
import org.eclipse.mylar.internal.tasks.ui.actions.NewLocalTaskAction;
import org.eclipse.mylar.internal.tasks.ui.actions.TaskActivateAction;
import org.eclipse.mylar.tasks.core.AbstractRepositoryConnector;
import org.eclipse.mylar.tasks.core.AbstractRepositoryQuery;
import org.eclipse.mylar.tasks.core.DateRangeContainer;
import org.eclipse.mylar.tasks.core.ITask;
import org.eclipse.mylar.tasks.core.ITaskListElement;
import org.eclipse.mylar.tasks.core.Task;
import org.eclipse.mylar.tasks.core.TaskCategory;
import org.eclipse.mylar.tasks.core.TaskRepository;
import org.eclipse.mylar.tasks.ui.TaskTransfer;
import org.eclipse.mylar.tasks.ui.TasksUiPlugin;
import org.eclipse.mylar.tasks.ui.TasksUiUtil;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.FileTransfer;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.TransferData;
/**
* @author Mik Kersten
* @author Rob Elves (added URL based task creation support)
*/
public class TaskListDropAdapter extends ViewerDropAdapter {
private Task newTask = null;
private TransferData currentTransfer;
public TaskListDropAdapter(Viewer viewer) {
super(viewer);
setFeedbackEnabled(true);
}
@Override
public void dragOver(DropTargetEvent event) {
// support dragging from sources only supporting DROP_LINK
if (event.detail == DND.DROP_NONE && (event.operations & DND.DROP_LINK) == DND.DROP_LINK) {
event.detail = DND.DROP_LINK;
}
super.dragOver(event);
}
@Override
public boolean performDrop(Object data) {
Object currentTarget = getCurrentTarget();
List<ITask> tasksToMove = new ArrayList<ITask>();
ISelection selection = ((TreeViewer) getViewer()).getSelection();
if (isUrl(data) && createTaskFromUrl(data)) {
tasksToMove.add(newTask);
} else if (TaskTransfer.getInstance().isSupportedType(currentTransfer)) {
for (Object selectedObject : ((IStructuredSelection) selection).toList()) {
ITask toMove = null;
if (selectedObject instanceof ITask) {
toMove = (ITask) selectedObject;
}
if (toMove != null) {
tasksToMove.add(toMove);
}
}
} else if (data instanceof String && createTaskFromString((String) data)) {
tasksToMove.add(newTask);
} else if (FileTransfer.getInstance().isSupportedType(currentTransfer)) {
ITask targetTask = null;
if (getCurrentTarget() instanceof ITask) {
targetTask = (ITask) getCurrentTarget();
}
if (targetTask != null) {
final String[] names = (String[]) data;
boolean confirmed = MessageDialog.openConfirm(getViewer().getControl().getShell(),
ITasksUiConstants.TITLE_DIALOG, "Overwrite the context of the target task with the source's?");
if (confirmed) {
String path = names[0];
File file = new File(path);
if (ContextCorePlugin.getContextManager().isValidContextFile(file)) {
ContextCorePlugin.getContextManager().transferContextAndActivate(
targetTask.getHandleIdentifier(), file);
new TaskActivateAction().run(targetTask);
}
}
}
}
for (ITask task : tasksToMove) {
if (currentTarget instanceof TaskCategory) {
TasksUiPlugin.getTaskListManager().getTaskList().moveToContainer((TaskCategory) currentTarget, task);
} else if (currentTarget instanceof ITask) {
ITask targetTask = (ITask) currentTarget;
if (targetTask.getContainer() == null) {
TasksUiPlugin.getTaskListManager().getTaskList().moveToRoot(task);
} else {
TasksUiPlugin.getTaskListManager().getTaskList().moveToContainer(targetTask.getContainer(), task);
}
} else if (currentTarget instanceof DateRangeContainer) {
DateRangeContainer container = (DateRangeContainer)currentTarget;
Calendar newSchedule = Calendar.getInstance();
newSchedule.setTimeInMillis(container.getStart().getTimeInMillis());
TasksUiPlugin.getTaskListManager().setScheduledEndOfDay(newSchedule);
TasksUiPlugin.getTaskListManager().setScheduledFor(task, newSchedule.getTime());
} else if (currentTarget == null) {
TasksUiPlugin.getTaskListManager().getTaskList().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;
}
AbstractRepositoryConnector connector = TasksUiPlugin.getRepositoryManager().getConnectorForRepositoryTaskUrl(
url);
if (connector != null) {
String repositoryUrl = connector.getRepositoryUrlFromTaskUrl(url);
String id = connector.getTaskIdFromTaskUrl(url);
if (repositoryUrl == null || id == null) {
return false;
}
for (TaskRepository repository : TasksUiPlugin.getRepositoryManager().getRepositories(
connector.getRepositoryType())) {
if (repository.getUrl().equals(repositoryUrl)) {
try {
newTask = connector.createTaskFromExistingId(repository, id, new NullProgressMonitor());
// if (newTask instanceof AbstractRepositoryTask) {
// // TODO: encapsulate in abstract connector
// AbstractRepositoryTask repositoryTask = (AbstractRepositoryTask) newTask;
// TasksUiPlugin.getDefault().getTaskDataManager().push(
// RepositoryTaskHandleUtil.getHandle(repository.getUrl(), id),
// repositoryTask.getTaskData());
// }
TasksUiUtil.refreshAndOpenTaskListElement(newTask);
return true;
} catch (CoreException e) {
MylarStatusHandler.fail(e, "could not create task", false);
return false;
}
}
}
return false;
} else {
// 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(TasksUiPlugin.getTaskListManager().genUniqueTaskHandle(), urlTitle, true);
NewLocalTaskAction.scheduleNewTask(newTask);
if (newTask == null) {
return false;
}
newTask.setPriority(Task.PriorityLevel.P3.toString());
newTask.setTaskUrl(url);
// NOTE: setting boolean param as false so that we go directly to
// the
// browser tab as with a previously-created task
TasksUiUtil.openEditor(newTask, false);
return true;
}
}
public boolean createTaskFromString(String title) {
newTask = new Task(TasksUiPlugin.getTaskListManager().genUniqueTaskHandle(), title, true);
NewLocalTaskAction.scheduleNewTask(newTask);
if (newTask == null) {
return false;
} else {
newTask.setPriority(Task.PriorityLevel.P3.toString());
TasksUiUtil.openEditor(newTask, false);
return true;
}
}
@Override
public boolean validateDrop(Object targetObject, int operation, TransferData transferType) {
currentTransfer = transferType;
Object selectedObject = ((IStructuredSelection) ((TreeViewer) getViewer()).getSelection()).getFirstElement();
if (FileTransfer.getInstance().isSupportedType(currentTransfer)) {
if (getCurrentTarget() instanceof ITask) {
return true;
}
} else if (selectedObject != null && !(selectedObject instanceof AbstractRepositoryQuery)) {
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.setSummary(pageTitle);
TasksUiPlugin.getTaskListManager().getTaskList().notifyLocalInfoChanged(newTask);
}
};
job.schedule();
} catch (RuntimeException e) {
MylarStatusHandler.fail(e, "could not open task web page", false);
}
}
}
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