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/*******************************************************************************
* Copyright (c) 2004 - 2006 Mylar committers 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
*******************************************************************************/
package org.eclipse.mylar.internal.tasks.ui.actions;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.IOpenListener;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.OpenEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.mylar.internal.tasks.ui.views.TaskElementLabelProvider;
import org.eclipse.mylar.tasks.core.AbstractQueryHit;
import org.eclipse.mylar.tasks.core.AbstractRepositoryQuery;
import org.eclipse.mylar.tasks.core.AbstractRepositoryTask;
import org.eclipse.mylar.tasks.core.ITask;
import org.eclipse.mylar.tasks.core.ITaskListElement;
import org.eclipse.mylar.tasks.core.TaskList;
import org.eclipse.mylar.tasks.ui.TasksUiPlugin;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.dialogs.SelectionStatusDialog;
/**
* @author Willian Mitsuda
* @author Mik Kersten
* @author Eugene Kuleshov
*/
public class TaskSelectionDialog extends SelectionStatusDialog {
/**
* Implements a {@link ViewFilter} based on content typed in the filter
* field
*/
private static class TaskFilter extends ViewerFilter {
private Pattern pattern;
public void setFilterText(String filterText) {
if (filterText.trim().equals("")) {
pattern = null;
} else {
filterText = filterText.replace("\\", "\\\\");
filterText = filterText.replace(".", "\\.");
filterText = filterText.replace("*", ".*");
filterText = filterText.replace("?", ".?");
pattern = Pattern.compile(filterText, Pattern.CASE_INSENSITIVE);
}
}
@Override
public boolean select(Viewer viewer, Object parentElement, Object element) {
if (pattern == null) {
return TasksUiPlugin.getTaskListManager().getTaskActivationHistory().getPreviousTasks().contains(
element);
}
if (element instanceof ITask) {
ITask task = (ITask) element;
String taskString = AbstractRepositoryTask.getTaskId(task.getHandleIdentifier()) + ": "
+ task.getSummary();
return pattern.matcher(taskString).find();
} else if (element instanceof AbstractQueryHit) {
AbstractQueryHit hit = (AbstractQueryHit) element;
String taskString = hit.getIdLabel() + ": " + hit.getSummary();
return pattern.matcher(taskString).find();
}
return false;
}
}
private TableViewer viewer;
private Button openInBrowserCheck;
private boolean openInBrowser;
public boolean getOpenInBrowser() {
return openInBrowser;
}
public void setOpenInBrowser(boolean openInBrowser) {
this.openInBrowser = openInBrowser;
}
public TaskSelectionDialog(Shell parent) {
super(parent);
setShellStyle(getShellStyle() | SWT.RESIZE);
}
private boolean showOpenInBrowserOption;
public void setShowOpenInBrowserOption(boolean showOpenInBrowserOption) {
this.showOpenInBrowserOption = showOpenInBrowserOption;
}
public boolean getShowOpenInBrowserOption() {
return showOpenInBrowserOption;
}
@Override
protected Control createDialogArea(Composite parent) {
Composite area = (Composite) super.createDialogArea(parent);
Label message = new Label(area, SWT.NONE);
message.setText("&Select a task to open (? = any character, * = any String):");
final Text filterText = new Text(area, SWT.SINGLE | SWT.BORDER);
filterText.setLayoutData(new GridData(SWT.FILL, SWT.DEFAULT, true, false));
Label matches = new Label(area, SWT.NONE);
matches.setText("&Matching tasks:");
viewer = new TableViewer(area, SWT.SINGLE | SWT.BORDER);
Control control = viewer.getControl();
GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true);
control.setLayoutData(gd);
gd.widthHint = 400;
gd.heightHint = 200;
if (showOpenInBrowserOption) {
openInBrowserCheck = new Button(area, SWT.CHECK);
openInBrowserCheck.setText("Open with &Browser");
openInBrowserCheck.setSelection(openInBrowser);
}
final TaskElementLabelProvider labelProvider = new TaskElementLabelProvider();
viewer.setLabelProvider(labelProvider);
viewer.setContentProvider(new ArrayContentProvider());
// Compute all existing tasks or query hits (if corresponding task does
// not exist yet...)
Set<ITaskListElement> allTasks = new HashSet<ITaskListElement>();
TaskList taskList = TasksUiPlugin.getTaskListManager().getTaskList();
allTasks.addAll(taskList.getAllTasks());
for (AbstractRepositoryQuery query : taskList.getQueries()) {
allTasks.addAll(query.getChildren());
// TODO: should not need to do this
for (AbstractQueryHit hit : query.getHits()) {
if (hit.getCorrespondingTask() == null) {
allTasks.add(hit);
}
}
}
// Compute the task navigation history (in recent-to-older order)
final List<ITask> taskHistory = new ArrayList<ITask>(TasksUiPlugin.getTaskListManager()
.getTaskActivationHistory().getPreviousTasks());
Collections.reverse(taskHistory);
// Compute the task set who will be presented on dialog; the trick to
// make the task history appear first on the list is to add them before
// all other tasks; being a LinkedHashSet, it will not be duplicated
// (this is VERY IMPORTANT)
Set<ITaskListElement> taskSet = new LinkedHashSet<ITaskListElement>(taskHistory);
taskSet.addAll(allTasks);
viewer.setInput(taskSet);
final TaskSelectionDialog.TaskFilter filter = new TaskSelectionDialog.TaskFilter();
viewer.addFilter(filter);
viewer.setComparator(new ViewerComparator() {
private ITask getCorrespondingTask(Object o) {
if (o instanceof ITask) {
return (ITask) o;
}
if (o instanceof AbstractQueryHit) {
AbstractQueryHit hit = (AbstractQueryHit) o;
return hit.getCorrespondingTask();
}
return null;
}
@Override
public int compare(Viewer viewer, Object e1, Object e2) {
ITask t1 = getCorrespondingTask(e1);
ITask t2 = getCorrespondingTask(e2);
boolean isInHistory1 = taskHistory.contains(t1);
boolean isInHistory2 = taskHistory.contains(t2);
// Being on task history takes precedence...
if (isInHistory1 && !isInHistory2) {
return -1;
}
if (!isInHistory1 && isInHistory2) {
return 1;
}
// Both are in task history; who is more recent?
if (isInHistory1 && isInHistory2) {
return taskHistory.indexOf(t1) - taskHistory.indexOf(t2);
}
// Both are not in task history; sort by description...
return labelProvider.getText(e1).compareTo(labelProvider.getText(e2));
}
});
viewer.addOpenListener(new IOpenListener() {
public void open(OpenEvent event) {
if (getOkButton().getEnabled()) {
okPressed();
}
}
});
filterText.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if (e.keyCode == SWT.ARROW_DOWN) {
viewer.getControl().setFocus();
}
}
});
filterText.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent e) {
filter.setFilterText(filterText.getText());
viewer.refresh(false);
Object first = viewer.getElementAt(0);
if (first != null) {
viewer.setSelection(new StructuredSelection(first));
}
}
});
IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
ISelection selection = window.getSelectionService().getSelection();
if (selection instanceof ITextSelection) {
String text = ((ITextSelection) selection).getText();
int n = text.indexOf('\n');
if (n > -1) {
text.substring(0, n);
}
filterText.setText(text);
filterText.setSelection(0, text.length());
}
return area;
}
@Override
protected void computeResult() {
setResult(((IStructuredSelection) viewer.getSelection()).toList());
}
@Override
public boolean close() {
if (openInBrowserCheck != null) {
openInBrowser = openInBrowserCheck.getSelection();
}
return super.close();
}
}
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